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Message-Id: <20210318093315.694404-1-gregkh@linuxfoundation.org>
Date: Thu, 18 Mar 2021 10:33:15 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-staging@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jakub Kicinski <kuba@...nel.org>,
Arnd Bergmann <arnd@...db.de>,
Johannes Berg <johannes@...solutions.net>,
Randy Dunlap <rdunlap@...radead.org>,
"David S. Miller" <davem@...emloft.net>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
Wang Hai <wanghai38@...wei.com>,
Lee Jones <lee.jones@...aro.org>,
Colin Ian King <colin.king@...onical.com>,
Anirudh Rayabharam <mail@...rudhrb.com>,
Kumar Kartikeya Dwivedi <memxor@...il.com>,
Hemansh Agnihotri <hemanshagnihotri27@...il.com>,
Ayush <ayush@...root.org>, Xin Tan <tanxin.ctf@...il.com>,
Xiyu Yang <xiyuyang19@...an.edu.cn>,
Shannon Nelson <snelson@...sando.io>
Subject: [PATCH] staging: wimax: delete from the tree.
As stated in f54ec58fee83 ("wimax: move out to staging"), the wimax code
is dead with no known users. It has stayed in staging for 5 months,
with no one willing to take up the codebase for maintance and support,
so let's just remove it entirely for now.
If someone comes along and wants to revive it, a simple revert of this
patch is a good place to start.
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Johannes Berg <johannes@...solutions.net>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Wang Hai <wanghai38@...wei.com>
Cc: Lee Jones <lee.jones@...aro.org>
Cc: Colin Ian King <colin.king@...onical.com>
Cc: Anirudh Rayabharam <mail@...rudhrb.com>
Cc: Kumar Kartikeya Dwivedi <memxor@...il.com>
Cc: Hemansh Agnihotri <hemanshagnihotri27@...il.com>
Cc: Ayush <ayush@...root.org>
Cc: Xin Tan <tanxin.ctf@...il.com>
Cc: Xiyu Yang <xiyuyang19@...an.edu.cn>
Cc: Shannon Nelson <snelson@...sando.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/Kconfig | 2 -
drivers/staging/Makefile | 1 -
.../staging/wimax/Documentation/i2400m.rst | 283 ---
drivers/staging/wimax/Documentation/index.rst | 19 -
drivers/staging/wimax/Documentation/wimax.rst | 89 -
drivers/staging/wimax/Kconfig | 47 -
drivers/staging/wimax/Makefile | 15 -
drivers/staging/wimax/TODO | 18 -
drivers/staging/wimax/debug-levels.h | 29 -
drivers/staging/wimax/debugfs.c | 38 -
drivers/staging/wimax/i2400m/Kconfig | 37 -
drivers/staging/wimax/i2400m/Makefile | 23 -
drivers/staging/wimax/i2400m/control.c | 1434 --------------
drivers/staging/wimax/i2400m/debug-levels.h | 32 -
drivers/staging/wimax/i2400m/debugfs.c | 253 ---
drivers/staging/wimax/i2400m/driver.c | 1003 ----------
drivers/staging/wimax/i2400m/fw.c | 1666 -----------------
drivers/staging/wimax/i2400m/i2400m-usb.h | 275 ---
drivers/staging/wimax/i2400m/i2400m.h | 970 ----------
.../staging/wimax/i2400m/linux-wimax-i2400m.h | 572 ------
drivers/staging/wimax/i2400m/netdev.c | 603 ------
drivers/staging/wimax/i2400m/op-rfkill.c | 196 --
drivers/staging/wimax/i2400m/rx.c | 1394 --------------
drivers/staging/wimax/i2400m/sysfs.c | 65 -
drivers/staging/wimax/i2400m/tx.c | 1015 ----------
.../staging/wimax/i2400m/usb-debug-levels.h | 28 -
drivers/staging/wimax/i2400m/usb-fw.c | 365 ----
drivers/staging/wimax/i2400m/usb-notif.c | 258 ---
drivers/staging/wimax/i2400m/usb-rx.c | 462 -----
drivers/staging/wimax/i2400m/usb-tx.c | 273 ---
drivers/staging/wimax/i2400m/usb.c | 765 --------
drivers/staging/wimax/id-table.c | 130 --
drivers/staging/wimax/linux-wimax-debug.h | 491 -----
drivers/staging/wimax/linux-wimax.h | 239 ---
drivers/staging/wimax/net-wimax.h | 503 -----
drivers/staging/wimax/op-msg.c | 391 ----
drivers/staging/wimax/op-reset.c | 108 --
drivers/staging/wimax/op-rfkill.c | 432 -----
drivers/staging/wimax/op-state-get.c | 52 -
drivers/staging/wimax/stack.c | 604 ------
drivers/staging/wimax/wimax-internal.h | 85 -
41 files changed, 15265 deletions(-)
delete mode 100644 drivers/staging/wimax/Documentation/i2400m.rst
delete mode 100644 drivers/staging/wimax/Documentation/index.rst
delete mode 100644 drivers/staging/wimax/Documentation/wimax.rst
delete mode 100644 drivers/staging/wimax/Kconfig
delete mode 100644 drivers/staging/wimax/Makefile
delete mode 100644 drivers/staging/wimax/TODO
delete mode 100644 drivers/staging/wimax/debug-levels.h
delete mode 100644 drivers/staging/wimax/debugfs.c
delete mode 100644 drivers/staging/wimax/i2400m/Kconfig
delete mode 100644 drivers/staging/wimax/i2400m/Makefile
delete mode 100644 drivers/staging/wimax/i2400m/control.c
delete mode 100644 drivers/staging/wimax/i2400m/debug-levels.h
delete mode 100644 drivers/staging/wimax/i2400m/debugfs.c
delete mode 100644 drivers/staging/wimax/i2400m/driver.c
delete mode 100644 drivers/staging/wimax/i2400m/fw.c
delete mode 100644 drivers/staging/wimax/i2400m/i2400m-usb.h
delete mode 100644 drivers/staging/wimax/i2400m/i2400m.h
delete mode 100644 drivers/staging/wimax/i2400m/linux-wimax-i2400m.h
delete mode 100644 drivers/staging/wimax/i2400m/netdev.c
delete mode 100644 drivers/staging/wimax/i2400m/op-rfkill.c
delete mode 100644 drivers/staging/wimax/i2400m/rx.c
delete mode 100644 drivers/staging/wimax/i2400m/sysfs.c
delete mode 100644 drivers/staging/wimax/i2400m/tx.c
delete mode 100644 drivers/staging/wimax/i2400m/usb-debug-levels.h
delete mode 100644 drivers/staging/wimax/i2400m/usb-fw.c
delete mode 100644 drivers/staging/wimax/i2400m/usb-notif.c
delete mode 100644 drivers/staging/wimax/i2400m/usb-rx.c
delete mode 100644 drivers/staging/wimax/i2400m/usb-tx.c
delete mode 100644 drivers/staging/wimax/i2400m/usb.c
delete mode 100644 drivers/staging/wimax/id-table.c
delete mode 100644 drivers/staging/wimax/linux-wimax-debug.h
delete mode 100644 drivers/staging/wimax/linux-wimax.h
delete mode 100644 drivers/staging/wimax/net-wimax.h
delete mode 100644 drivers/staging/wimax/op-msg.c
delete mode 100644 drivers/staging/wimax/op-reset.c
delete mode 100644 drivers/staging/wimax/op-rfkill.c
delete mode 100644 drivers/staging/wimax/op-state-get.c
delete mode 100644 drivers/staging/wimax/stack.c
delete mode 100644 drivers/staging/wimax/wimax-internal.h
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index efddc50c81f9..7b57b755bfa3 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -106,8 +106,6 @@ source "drivers/staging/kpc2000/Kconfig"
source "drivers/staging/qlge/Kconfig"
-source "drivers/staging/wimax/Kconfig"
-
source "drivers/staging/wfx/Kconfig"
source "drivers/staging/hikey9xx/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index e2e95a20081a..4350423f65aa 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -43,6 +43,5 @@ obj-$(CONFIG_XIL_AXIS_FIFO) += axis-fifo/
obj-$(CONFIG_FIELDBUS_DEV) += fieldbus/
obj-$(CONFIG_KPC2000) += kpc2000/
obj-$(CONFIG_QLGE) += qlge/
-obj-$(CONFIG_WIMAX) += wimax/
obj-$(CONFIG_WFX) += wfx/
obj-y += hikey9xx/
diff --git a/drivers/staging/wimax/Documentation/i2400m.rst b/drivers/staging/wimax/Documentation/i2400m.rst
deleted file mode 100644
index 194388c0c351..000000000000
--- a/drivers/staging/wimax/Documentation/i2400m.rst
+++ /dev/null
@@ -1,283 +0,0 @@
-.. include:: <isonum.txt>
-
-====================================================
-Driver for the Intel Wireless Wimax Connection 2400m
-====================================================
-
-:Copyright: |copy| 2008 Intel Corporation < linux-wimax@...el.com >
-
- This provides a driver for the Intel Wireless WiMAX Connection 2400m
- and a basic Linux kernel WiMAX stack.
-
-1. Requirements
-===============
-
- * Linux installation with Linux kernel 2.6.22 or newer (if building
- from a separate tree)
- * Intel i2400m Echo Peak or Baxter Peak; this includes the Intel
- Wireless WiMAX/WiFi Link 5x50 series.
- * build tools:
-
- + Linux kernel development package for the target kernel; to
- build against your currently running kernel, you need to have
- the kernel development package corresponding to the running
- image installed (usually if your kernel is named
- linux-VERSION, the development package is called
- linux-dev-VERSION or linux-headers-VERSION).
- + GNU C Compiler, make
-
-2. Compilation and installation
-===============================
-
-2.1. Compilation of the drivers included in the kernel
-------------------------------------------------------
-
- Configure the kernel; to enable the WiMAX drivers select Drivers >
- Networking Drivers > WiMAX device support. Enable all of them as
- modules (easier).
-
- If USB or SDIO are not enabled in the kernel configuration, the options
- to build the i2400m USB or SDIO drivers will not show. Enable said
- subsystems and go back to the WiMAX menu to enable the drivers.
-
- Compile and install your kernel as usual.
-
-2.2. Compilation of the drivers distributed as an standalone module
--------------------------------------------------------------------
-
- To compile::
-
- $ cd source/directory
- $ make
-
- Once built you can load and unload using the provided load.sh script;
- load.sh will load the modules, load.sh u will unload them.
-
- To install in the default kernel directories (and enable auto loading
- when the device is plugged)::
-
- $ make install
- $ depmod -a
-
- If your kernel development files are located in a non standard
- directory or if you want to build for a kernel that is not the
- currently running one, set KDIR to the right location::
-
- $ make KDIR=/path/to/kernel/dev/tree
-
- For more information, please contact linux-wimax@...el.com.
-
-3. Installing the firmware
---------------------------
-
- The firmware can be obtained from http://linuxwimax.org or might have
- been supplied with your hardware.
-
- It has to be installed in the target system::
-
- $ cp FIRMWAREFILE.sbcf /lib/firmware/i2400m-fw-BUSTYPE-1.3.sbcf
-
- * NOTE: if your firmware came in an .rpm or .deb file, just install
- it as normal, with the rpm (rpm -i FIRMWARE.rpm) or dpkg
- (dpkg -i FIRMWARE.deb) commands. No further action is needed.
- * BUSTYPE will be usb or sdio, depending on the hardware you have.
- Each hardware type comes with its own firmware and will not work
- with other types.
-
-4. Design
-=========
-
- This package contains two major parts: a WiMAX kernel stack and a
- driver for the Intel i2400m.
-
- The WiMAX stack is designed to provide for common WiMAX control
- services to current and future WiMAX devices from any vendor; please
- see README.wimax for details.
-
- The i2400m kernel driver is broken up in two main parts: the bus
- generic driver and the bus-specific drivers. The bus generic driver
- forms the drivercore and contain no knowledge of the actual method we
- use to connect to the device. The bus specific drivers are just the
- glue to connect the bus-generic driver and the device. Currently only
- USB and SDIO are supported. See drivers/net/wimax/i2400m/i2400m.h for
- more information.
-
- The bus generic driver is logically broken up in two parts: OS-glue and
- hardware-glue. The OS-glue interfaces with Linux. The hardware-glue
- interfaces with the device on using an interface provided by the
- bus-specific driver. The reason for this breakup is to be able to
- easily reuse the hardware-glue to write drivers for other OSes; note
- the hardware glue part is written as a native Linux driver; no
- abstraction layers are used, so to port to another OS, the Linux kernel
- API calls should be replaced with the target OS's.
-
-5. Usage
-========
-
- To load the driver, follow the instructions in the install section;
- once the driver is loaded, plug in the device (unless it is permanently
- plugged in). The driver will enumerate the device, upload the firmware
- and output messages in the kernel log (dmesg, /var/log/messages or
- /var/log/kern.log) such as::
-
- ...
- i2400m_usb 5-4:1.0: firmware interface version 8.0.0
- i2400m_usb 5-4:1.0: WiMAX interface wmx0 (00:1d:e1:01:94:2c) ready
-
- At this point the device is ready to work.
-
- Current versions require the Intel WiMAX Network Service in userspace
- to make things work. See the network service's README for instructions
- on how to scan, connect and disconnect.
-
-5.1. Module parameters
-----------------------
-
- Module parameters can be set at kernel or module load time or by
- echoing values::
-
- $ echo VALUE > /sys/module/MODULENAME/parameters/PARAMETERNAME
-
- To make changes permanent, for example, for the i2400m module, you can
- also create a file named /etc/modprobe.d/i2400m containing::
-
- options i2400m idle_mode_disabled=1
-
- To find which parameters are supported by a module, run::
-
- $ modinfo path/to/module.ko
-
- During kernel bootup (if the driver is linked in the kernel), specify
- the following to the kernel command line::
-
- i2400m.PARAMETER=VALUE
-
-5.1.1. i2400m: idle_mode_disabled
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- The i2400m module supports a parameter to disable idle mode. This
- parameter, once set, will take effect only when the device is
- reinitialized by the driver (eg: following a reset or a reconnect).
-
-5.2. Debug operations: debugfs entries
---------------------------------------
-
- The driver will register debugfs entries that allow the user to tweak
- debug settings. There are three main container directories where
- entries are placed, which correspond to the three blocks a i2400m WiMAX
- driver has:
-
- * /sys/kernel/debug/wimax:DEVNAME/ for the generic WiMAX stack
- controls
- * /sys/kernel/debug/wimax:DEVNAME/i2400m for the i2400m generic
- driver controls
- * /sys/kernel/debug/wimax:DEVNAME/i2400m-usb (or -sdio) for the
- bus-specific i2400m-usb or i2400m-sdio controls).
-
- Of course, if debugfs is mounted in a directory other than
- /sys/kernel/debug, those paths will change.
-
-5.2.1. Increasing debug output
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- The files named *dl_* indicate knobs for controlling the debug output
- of different submodules::
-
- # find /sys/kernel/debug/wimax\:wmx0 -name \*dl_\*
- /sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_tx
- /sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_rx
- /sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_notif
- /sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_fw
- /sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_usb
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_tx
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_rx
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_rfkill
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_netdev
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_fw
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_debugfs
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_driver
- /sys/kernel/debug/wimax:wmx0/i2400m/dl_control
- /sys/kernel/debug/wimax:wmx0/wimax_dl_stack
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_rfkill
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_reset
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_msg
- /sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
- /sys/kernel/debug/wimax:wmx0/wimax_dl_debugfs
-
- By reading the file you can obtain the current value of said debug
- level; by writing to it, you can set it.
-
- To increase the debug level of, for example, the i2400m's generic TX
- engine, just write::
-
- $ echo 3 > /sys/kernel/debug/wimax:wmx0/i2400m/dl_tx
-
- Increasing numbers yield increasing debug information; for details of
- what is printed and the available levels, check the source. The code
- uses 0 for disabled and increasing values until 8.
-
-5.2.2. RX and TX statistics
-^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- The i2400m/rx_stats and i2400m/tx_stats provide statistics about the
- data reception/delivery from the device::
-
- $ cat /sys/kernel/debug/wimax:wmx0/i2400m/rx_stats
- 45 1 3 34 3104 48 480
-
- The numbers reported are:
-
- * packets/RX-buffer: total, min, max
- * RX-buffers: total RX buffers received, accumulated RX buffer size
- in bytes, min size received, max size received
-
- Thus, to find the average buffer size received, divide accumulated
- RX-buffer / total RX-buffers.
-
- To clear the statistics back to 0, write anything to the rx_stats file::
-
- $ echo 1 > /sys/kernel/debug/wimax:wmx0/i2400m_rx_stats
-
- Likewise for TX.
-
- Note the packets this debug file refers to are not network packet, but
- packets in the sense of the device-specific protocol for communication
- to the host. See drivers/net/wimax/i2400m/tx.c.
-
-5.2.3. Tracing messages received from user space
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- To echo messages received from user space into the trace pipe that the
- i2400m driver creates, set the debug file i2400m/trace_msg_from_user to
- 1::
-
- $ echo 1 > /sys/kernel/debug/wimax:wmx0/i2400m/trace_msg_from_user
-
-5.2.4. Performing a device reset
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- By writing a 0, a 1 or a 2 to the file
- /sys/kernel/debug/wimax:wmx0/reset, the driver performs a warm (without
- disconnecting from the bus), cold (disconnecting from the bus) or bus
- (bus specific) reset on the device.
-
-5.2.5. Asking the device to enter power saving mode
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
- By writing any value to the /sys/kernel/debug/wimax:wmx0 file, the
- device will attempt to enter power saving mode.
-
-6. Troubleshooting
-==================
-
-6.1. Driver complains about ``i2400m-fw-usb-1.2.sbcf: request failed``
-----------------------------------------------------------------------
-
- If upon connecting the device, the following is output in the kernel
- log::
-
- i2400m_usb 5-4:1.0: fw i2400m-fw-usb-1.3.sbcf: request failed: -2
-
- This means that the driver cannot locate the firmware file named
- /lib/firmware/i2400m-fw-usb-1.2.sbcf. Check that the file is present in
- the right location.
diff --git a/drivers/staging/wimax/Documentation/index.rst b/drivers/staging/wimax/Documentation/index.rst
deleted file mode 100644
index fdf7c1f99ff5..000000000000
--- a/drivers/staging/wimax/Documentation/index.rst
+++ /dev/null
@@ -1,19 +0,0 @@
-.. SPDX-License-Identifier: GPL-2.0
-
-===============
-WiMAX subsystem
-===============
-
-.. toctree::
- :maxdepth: 2
-
- wimax
-
- i2400m
-
-.. only:: subproject and html
-
- Indices
- =======
-
- * :ref:`genindex`
diff --git a/drivers/staging/wimax/Documentation/wimax.rst b/drivers/staging/wimax/Documentation/wimax.rst
deleted file mode 100644
index 817ee8ba2732..000000000000
--- a/drivers/staging/wimax/Documentation/wimax.rst
+++ /dev/null
@@ -1,89 +0,0 @@
-.. include:: <isonum.txt>
-
-========================
-Linux kernel WiMAX stack
-========================
-
-:Copyright: |copy| 2008 Intel Corporation < linux-wimax@...el.com >
-
- This provides a basic Linux kernel WiMAX stack to provide a common
- control API for WiMAX devices, usable from kernel and user space.
-
-1. Design
-=========
-
- The WiMAX stack is designed to provide for common WiMAX control
- services to current and future WiMAX devices from any vendor.
-
- Because currently there is only one and we don't know what would be the
- common services, the APIs it currently provides are very minimal.
- However, it is done in such a way that it is easily extensible to
- accommodate future requirements.
-
- The stack works by embedding a struct wimax_dev in your device's
- control structures. This provides a set of callbacks that the WiMAX
- stack will call in order to implement control operations requested by
- the user. As well, the stack provides API functions that the driver
- calls to notify about changes of state in the device.
-
- The stack exports the API calls needed to control the device to user
- space using generic netlink as a marshalling mechanism. You can access
- them using your own code or use the wrappers provided for your
- convenience in libwimax (in the wimax-tools package).
-
- For detailed information on the stack, please see
- include/linux/wimax.h.
-
-2. Usage
-========
-
- For usage in a driver (registration, API, etc) please refer to the
- instructions in the header file include/linux/wimax.h.
-
- When a device is registered with the WiMAX stack, a set of debugfs
- files will appear in /sys/kernel/debug/wimax:wmxX can tweak for
- control.
-
-2.1. Obtaining debug information: debugfs entries
--------------------------------------------------
-
- The WiMAX stack is compiled, by default, with debug messages that can
- be used to diagnose issues. By default, said messages are disabled.
-
- The drivers will register debugfs entries that allow the user to tweak
- debug settings.
-
- Each driver, when registering with the stack, will cause a debugfs
- directory named wimax:DEVICENAME to be created; optionally, it might
- create more subentries below it.
-
-2.1.1. Increasing debug output
-------------------------------
-
- The files named *dl_* indicate knobs for controlling the debug output
- of different submodules of the WiMAX stack::
-
- # find /sys/kernel/debug/wimax\:wmx0 -name \*dl_\*
- /sys/kernel/debug/wimax:wmx0/wimax_dl_stack
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_rfkill
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_reset
- /sys/kernel/debug/wimax:wmx0/wimax_dl_op_msg
- /sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
- /sys/kernel/debug/wimax:wmx0/wimax_dl_debugfs
- /sys/kernel/debug/wimax:wmx0/.... # other driver specific files
-
- NOTE:
- Of course, if debugfs is mounted in a directory other than
- /sys/kernel/debug, those paths will change.
-
- By reading the file you can obtain the current value of said debug
- level; by writing to it, you can set it.
-
- To increase the debug level of, for example, the id-table submodule,
- just write:
-
- $ echo 3 > /sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
-
- Increasing numbers yield increasing debug information; for details of
- what is printed and the available levels, check the source. The code
- uses 0 for disabled and increasing values until 8.
diff --git a/drivers/staging/wimax/Kconfig b/drivers/staging/wimax/Kconfig
deleted file mode 100644
index 113c35072e2c..000000000000
--- a/drivers/staging/wimax/Kconfig
+++ /dev/null
@@ -1,47 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# WiMAX LAN device configuration
-#
-
-menuconfig WIMAX
- tristate "WiMAX Wireless Broadband support"
- depends on NET
- depends on RFKILL || !RFKILL
- help
-
- Select to configure support for devices that provide
- wireless broadband connectivity using the WiMAX protocol
- (IEEE 802.16).
-
- Please note that most of these devices require signing up
- for a service plan with a provider.
-
- The different WiMAX drivers can be enabled in the menu entry
-
- Device Drivers > Network device support > WiMAX Wireless
- Broadband devices
-
- If unsure, it is safe to select M (module).
-
-if WIMAX
-
-config WIMAX_DEBUG_LEVEL
- int "WiMAX debug level"
- depends on WIMAX
- default 8
- help
-
- Select the maximum debug verbosity level to be compiled into
- the WiMAX stack code.
-
- By default, debug messages are disabled at runtime and can
- be selectively enabled for different parts of the code using
- the sysfs debug-levels file.
-
- If set at zero, this will compile out all the debug code.
-
- It is recommended that it is left at 8.
-
-source "drivers/staging/wimax/i2400m/Kconfig"
-
-endif
diff --git a/drivers/staging/wimax/Makefile b/drivers/staging/wimax/Makefile
deleted file mode 100644
index 0e3f988656aa..000000000000
--- a/drivers/staging/wimax/Makefile
+++ /dev/null
@@ -1,15 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_WIMAX) += wimax.o
-
-wimax-y := \
- id-table.o \
- op-msg.o \
- op-reset.o \
- op-rfkill.o \
- op-state-get.o \
- stack.o
-
-wimax-$(CONFIG_DEBUG_FS) += debugfs.o
-
-obj-$(CONFIG_WIMAX_I2400M) += i2400m/
diff --git a/drivers/staging/wimax/TODO b/drivers/staging/wimax/TODO
deleted file mode 100644
index 26e4cb9e9599..000000000000
--- a/drivers/staging/wimax/TODO
+++ /dev/null
@@ -1,18 +0,0 @@
-There are no known users of this driver as of October 2020, and it will
-be removed unless someone turns out to still need it in future releases.
-
-According to https://en.wikipedia.org/wiki/List_of_WiMAX_networks, there
-have been many public wimax networks, but it appears that many of these
-have migrated to LTE or discontinued their service altogether. As most
-PCs and phones lack WiMAX hardware support, the remaining networks tend
-to use standalone routers. These almost certainly run Linux, but not a
-modern kernel or the mainline wimax driver stack.
-
-NetworkManager appears to have dropped userspace support in 2015
-https://bugzilla.gnome.org/show_bug.cgi?id=747846, the www.linuxwimax.org
-site had already shut down earlier.
-
-WiMax is apparently still being deployed on airport campus networks
-("AeroMACS"), but in a frequency band that was not supported by the old
-Intel 2400m (used in Sandy Bridge laptops and earlier), which is the
-only driver using the kernel's wimax stack.
diff --git a/drivers/staging/wimax/debug-levels.h b/drivers/staging/wimax/debug-levels.h
deleted file mode 100644
index b854802d1d00..000000000000
--- a/drivers/staging/wimax/debug-levels.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Linux WiMAX Stack
- * Debug levels control file for the wimax module
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-#ifndef __debug_levels__h__
-#define __debug_levels__h__
-
-/* Maximum compile and run time debug level for all submodules */
-#define D_MODULENAME wimax
-#define D_MASTER CONFIG_WIMAX_DEBUG_LEVEL
-
-#include "linux-wimax-debug.h"
-
-/* List of all the enabled modules */
-enum d_module {
- D_SUBMODULE_DECLARE(debugfs),
- D_SUBMODULE_DECLARE(id_table),
- D_SUBMODULE_DECLARE(op_msg),
- D_SUBMODULE_DECLARE(op_reset),
- D_SUBMODULE_DECLARE(op_rfkill),
- D_SUBMODULE_DECLARE(op_state_get),
- D_SUBMODULE_DECLARE(stack),
-};
-
-#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/staging/wimax/debugfs.c b/drivers/staging/wimax/debugfs.c
deleted file mode 100644
index e11bff61ffcf..000000000000
--- a/drivers/staging/wimax/debugfs.c
+++ /dev/null
@@ -1,38 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Debugfs support
- *
- * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-#include <linux/debugfs.h>
-#include "linux-wimax.h"
-#include "wimax-internal.h"
-
-#define D_SUBMODULE debugfs
-#include "debug-levels.h"
-
-void wimax_debugfs_add(struct wimax_dev *wimax_dev)
-{
- struct net_device *net_dev = wimax_dev->net_dev;
- struct dentry *dentry;
- char buf[128];
-
- snprintf(buf, sizeof(buf), "wimax:%s", net_dev->name);
- dentry = debugfs_create_dir(buf, NULL);
- wimax_dev->debugfs_dentry = dentry;
-
- d_level_register_debugfs("wimax_dl_", debugfs, dentry);
- d_level_register_debugfs("wimax_dl_", id_table, dentry);
- d_level_register_debugfs("wimax_dl_", op_msg, dentry);
- d_level_register_debugfs("wimax_dl_", op_reset, dentry);
- d_level_register_debugfs("wimax_dl_", op_rfkill, dentry);
- d_level_register_debugfs("wimax_dl_", op_state_get, dentry);
- d_level_register_debugfs("wimax_dl_", stack, dentry);
-}
-
-void wimax_debugfs_rm(struct wimax_dev *wimax_dev)
-{
- debugfs_remove_recursive(wimax_dev->debugfs_dentry);
-}
diff --git a/drivers/staging/wimax/i2400m/Kconfig b/drivers/staging/wimax/i2400m/Kconfig
deleted file mode 100644
index 843b905a26a3..000000000000
--- a/drivers/staging/wimax/i2400m/Kconfig
+++ /dev/null
@@ -1,37 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-
-config WIMAX_I2400M
- tristate
- depends on WIMAX
- select FW_LOADER
-
-comment "Enable USB support to see WiMAX USB drivers"
- depends on USB = n
-
-config WIMAX_I2400M_USB
- tristate "Intel Wireless WiMAX Connection 2400 over USB (including 5x50)"
- depends on WIMAX && USB
- select WIMAX_I2400M
- help
- Select if you have a device based on the Intel WiMAX
- Connection 2400 over USB (like any of the Intel Wireless
- WiMAX/WiFi Link 5x50 series).
-
- If unsure, it is safe to select M (module).
-
-config WIMAX_I2400M_DEBUG_LEVEL
- int "WiMAX i2400m debug level"
- depends on WIMAX_I2400M
- default 8
- help
-
- Select the maximum debug verbosity level to be compiled into
- the WiMAX i2400m driver code.
-
- By default, this is disabled at runtime and can be
- selectively enabled at runtime for different parts of the
- code using the sysfs debug-levels file.
-
- If set at zero, this will compile out all the debug code.
-
- It is recommended that it is left at 8.
diff --git a/drivers/staging/wimax/i2400m/Makefile b/drivers/staging/wimax/i2400m/Makefile
deleted file mode 100644
index b1db1eff0648..000000000000
--- a/drivers/staging/wimax/i2400m/Makefile
+++ /dev/null
@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_WIMAX_I2400M) += i2400m.o
-obj-$(CONFIG_WIMAX_I2400M_USB) += i2400m-usb.o
-
-i2400m-y := \
- control.o \
- driver.o \
- fw.o \
- op-rfkill.o \
- sysfs.o \
- netdev.o \
- tx.o \
- rx.o
-
-i2400m-$(CONFIG_DEBUG_FS) += debugfs.o
-
-i2400m-usb-y := \
- usb-fw.o \
- usb-notif.o \
- usb-tx.o \
- usb-rx.o \
- usb.o
diff --git a/drivers/staging/wimax/i2400m/control.c b/drivers/staging/wimax/i2400m/control.c
deleted file mode 100644
index b6b2788af162..000000000000
--- a/drivers/staging/wimax/i2400m/control.c
+++ /dev/null
@@ -1,1434 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Miscellaneous control functions for managing the device
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- * This is a collection of functions used to control the device (plus
- * a few helpers).
- *
- * There are utilities for handling TLV buffers, hooks on the device's
- * reports to act on device changes of state [i2400m_report_hook()],
- * on acks to commands [i2400m_msg_ack_hook()], a helper for sending
- * commands to the device and blocking until a reply arrives
- * [i2400m_msg_to_dev()], a few high level commands for manipulating
- * the device state, powersving mode and configuration plus the
- * routines to setup the device once communication is stablished with
- * it [i2400m_dev_initialize()].
- *
- * ROADMAP
- *
- * i2400m_dev_initialize() Called by i2400m_dev_start()
- * i2400m_set_init_config()
- * i2400m_cmd_get_state()
- * i2400m_dev_shutdown() Called by i2400m_dev_stop()
- * i2400m_reset()
- *
- * i2400m_{cmd,get,set}_*()
- * i2400m_msg_to_dev()
- * i2400m_msg_check_status()
- *
- * i2400m_report_hook() Called on reception of an event
- * i2400m_report_state_hook()
- * i2400m_tlv_buffer_walk()
- * i2400m_tlv_match()
- * i2400m_report_tlv_system_state()
- * i2400m_report_tlv_rf_switches_status()
- * i2400m_report_tlv_media_status()
- * i2400m_cmd_enter_powersave()
- *
- * i2400m_msg_ack_hook() Called on reception of a reply to a
- * command, get or set
- */
-
-#include <stdarg.h>
-#include "i2400m.h"
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include "linux-wimax-i2400m.h"
-#include <linux/export.h>
-#include <linux/moduleparam.h>
-
-
-#define D_SUBMODULE control
-#include "debug-levels.h"
-
-static int i2400m_idle_mode_disabled;/* 0 (idle mode enabled) by default */
-module_param_named(idle_mode_disabled, i2400m_idle_mode_disabled, int, 0644);
-MODULE_PARM_DESC(idle_mode_disabled,
- "If true, the device will not enable idle mode negotiation "
- "with the base station (when connected) to save power.");
-
-/* 0 (power saving enabled) by default */
-static int i2400m_power_save_disabled;
-module_param_named(power_save_disabled, i2400m_power_save_disabled, int, 0644);
-MODULE_PARM_DESC(power_save_disabled,
- "If true, the driver will not tell the device to enter "
- "power saving mode when it reports it is ready for it. "
- "False by default (so the device is told to do power "
- "saving).");
-
-static int i2400m_passive_mode; /* 0 (passive mode disabled) by default */
-module_param_named(passive_mode, i2400m_passive_mode, int, 0644);
-MODULE_PARM_DESC(passive_mode,
- "If true, the driver will not do any device setup "
- "and leave it up to user space, who must be properly "
- "setup.");
-
-
-/*
- * Return if a TLV is of a give type and size
- *
- * @tlv_hdr: pointer to the TLV
- * @tlv_type: type of the TLV we are looking for
- * @tlv_size: expected size of the TLV we are looking for (if -1,
- * don't check the size). This includes the header
- * Returns: 0 if the TLV matches
- * < 0 if it doesn't match at all
- * > 0 total TLV + payload size, if the type matches, but not
- * the size
- */
-static
-ssize_t i2400m_tlv_match(const struct i2400m_tlv_hdr *tlv,
- enum i2400m_tlv tlv_type, ssize_t tlv_size)
-{
- if (le16_to_cpu(tlv->type) != tlv_type) /* Not our type? skip */
- return -1;
- if (tlv_size != -1
- && le16_to_cpu(tlv->length) + sizeof(*tlv) != tlv_size) {
- size_t size = le16_to_cpu(tlv->length) + sizeof(*tlv);
- printk(KERN_WARNING "W: tlv type 0x%x mismatched because of "
- "size (got %zu vs %zd expected)\n",
- tlv_type, size, tlv_size);
- return size;
- }
- return 0;
-}
-
-
-/*
- * Given a buffer of TLVs, iterate over them
- *
- * @i2400m: device instance
- * @tlv_buf: pointer to the beginning of the TLV buffer
- * @buf_size: buffer size in bytes
- * @tlv_pos: seek position; this is assumed to be a pointer returned
- * by i2400m_tlv_buffer_walk() [and thus, validated]. The
- * TLV returned will be the one following this one.
- *
- * Usage:
- *
- * tlv_itr = NULL;
- * while (tlv_itr = i2400m_tlv_buffer_walk(i2400m, buf, size, tlv_itr)) {
- * ...
- * // Do stuff with tlv_itr, DON'T MODIFY IT
- * ...
- * }
- */
-static
-const struct i2400m_tlv_hdr *i2400m_tlv_buffer_walk(
- struct i2400m *i2400m,
- const void *tlv_buf, size_t buf_size,
- const struct i2400m_tlv_hdr *tlv_pos)
-{
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_tlv_hdr *tlv_top = tlv_buf + buf_size;
- size_t offset, length, avail_size;
- unsigned type;
-
- if (tlv_pos == NULL) /* Take the first one? */
- tlv_pos = tlv_buf;
- else /* Nope, the next one */
- tlv_pos = (void *) tlv_pos
- + le16_to_cpu(tlv_pos->length) + sizeof(*tlv_pos);
- if (tlv_pos == tlv_top) { /* buffer done */
- tlv_pos = NULL;
- goto error_beyond_end;
- }
- if (tlv_pos > tlv_top) {
- tlv_pos = NULL;
- WARN_ON(1);
- goto error_beyond_end;
- }
- offset = (void *) tlv_pos - (void *) tlv_buf;
- avail_size = buf_size - offset;
- if (avail_size < sizeof(*tlv_pos)) {
- dev_err(dev, "HW BUG? tlv_buf %p [%zu bytes], tlv @%zu: "
- "short header\n", tlv_buf, buf_size, offset);
- goto error_short_header;
- }
- type = le16_to_cpu(tlv_pos->type);
- length = le16_to_cpu(tlv_pos->length);
- if (avail_size < sizeof(*tlv_pos) + length) {
- dev_err(dev, "HW BUG? tlv_buf %p [%zu bytes], "
- "tlv type 0x%04x @%zu: "
- "short data (%zu bytes vs %zu needed)\n",
- tlv_buf, buf_size, type, offset, avail_size,
- sizeof(*tlv_pos) + length);
- goto error_short_header;
- }
-error_short_header:
-error_beyond_end:
- return tlv_pos;
-}
-
-
-/*
- * Find a TLV in a buffer of sequential TLVs
- *
- * @i2400m: device descriptor
- * @tlv_hdr: pointer to the first TLV in the sequence
- * @size: size of the buffer in bytes; all TLVs are assumed to fit
- * fully in the buffer (otherwise we'll complain).
- * @tlv_type: type of the TLV we are looking for
- * @tlv_size: expected size of the TLV we are looking for (if -1,
- * don't check the size). This includes the header
- *
- * Returns: NULL if the TLV is not found, otherwise a pointer to
- * it. If the sizes don't match, an error is printed and NULL
- * returned.
- */
-static
-const struct i2400m_tlv_hdr *i2400m_tlv_find(
- struct i2400m *i2400m,
- const struct i2400m_tlv_hdr *tlv_hdr, size_t size,
- enum i2400m_tlv tlv_type, ssize_t tlv_size)
-{
- ssize_t match;
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_tlv_hdr *tlv = NULL;
- while ((tlv = i2400m_tlv_buffer_walk(i2400m, tlv_hdr, size, tlv))) {
- match = i2400m_tlv_match(tlv, tlv_type, tlv_size);
- if (match == 0) /* found it :) */
- break;
- if (match > 0)
- dev_warn(dev, "TLV type 0x%04x found with size "
- "mismatch (%zu vs %zd needed)\n",
- tlv_type, match, tlv_size);
- }
- return tlv;
-}
-
-
-static const struct
-{
- char *msg;
- int errno;
-} ms_to_errno[I2400M_MS_MAX] = {
- [I2400M_MS_DONE_OK] = { "", 0 },
- [I2400M_MS_DONE_IN_PROGRESS] = { "", 0 },
- [I2400M_MS_INVALID_OP] = { "invalid opcode", -ENOSYS },
- [I2400M_MS_BAD_STATE] = { "invalid state", -EILSEQ },
- [I2400M_MS_ILLEGAL_VALUE] = { "illegal value", -EINVAL },
- [I2400M_MS_MISSING_PARAMS] = { "missing parameters", -ENOMSG },
- [I2400M_MS_VERSION_ERROR] = { "bad version", -EIO },
- [I2400M_MS_ACCESSIBILITY_ERROR] = { "accesibility error", -EIO },
- [I2400M_MS_BUSY] = { "busy", -EBUSY },
- [I2400M_MS_CORRUPTED_TLV] = { "corrupted TLV", -EILSEQ },
- [I2400M_MS_UNINITIALIZED] = { "uninitialized", -EILSEQ },
- [I2400M_MS_UNKNOWN_ERROR] = { "unknown error", -EIO },
- [I2400M_MS_PRODUCTION_ERROR] = { "production error", -EIO },
- [I2400M_MS_NO_RF] = { "no RF", -EIO },
- [I2400M_MS_NOT_READY_FOR_POWERSAVE] =
- { "not ready for powersave", -EACCES },
- [I2400M_MS_THERMAL_CRITICAL] = { "thermal critical", -EL3HLT },
-};
-
-
-/*
- * i2400m_msg_check_status - translate a message's status code
- *
- * @i2400m: device descriptor
- * @l3l4_hdr: message header
- * @strbuf: buffer to place a formatted error message (unless NULL).
- * @strbuf_size: max amount of available space; larger messages will
- * be truncated.
- *
- * Returns: errno code corresponding to the status code in @l3l4_hdr
- * and a message in @strbuf describing the error.
- */
-int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *l3l4_hdr,
- char *strbuf, size_t strbuf_size)
-{
- int result;
- enum i2400m_ms status = le16_to_cpu(l3l4_hdr->status);
- const char *str;
-
- if (status == 0)
- return 0;
- if (status >= ARRAY_SIZE(ms_to_errno)) {
- str = "unknown status code";
- result = -EBADR;
- } else {
- str = ms_to_errno[status].msg;
- result = ms_to_errno[status].errno;
- }
- if (strbuf)
- snprintf(strbuf, strbuf_size, "%s (%d)", str, status);
- return result;
-}
-
-
-/*
- * Act on a TLV System State reported by the device
- *
- * @i2400m: device descriptor
- * @ss: validated System State TLV
- */
-static
-void i2400m_report_tlv_system_state(struct i2400m *i2400m,
- const struct i2400m_tlv_system_state *ss)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- enum i2400m_system_state i2400m_state = le32_to_cpu(ss->state);
-
- d_fnstart(3, dev, "(i2400m %p ss %p [%u])\n", i2400m, ss, i2400m_state);
-
- if (i2400m->state != i2400m_state) {
- i2400m->state = i2400m_state;
- wake_up_all(&i2400m->state_wq);
- }
- switch (i2400m_state) {
- case I2400M_SS_UNINITIALIZED:
- case I2400M_SS_INIT:
- case I2400M_SS_CONFIG:
- case I2400M_SS_PRODUCTION:
- wimax_state_change(wimax_dev, WIMAX_ST_UNINITIALIZED);
- break;
-
- case I2400M_SS_RF_OFF:
- case I2400M_SS_RF_SHUTDOWN:
- wimax_state_change(wimax_dev, WIMAX_ST_RADIO_OFF);
- break;
-
- case I2400M_SS_READY:
- case I2400M_SS_STANDBY:
- case I2400M_SS_SLEEPACTIVE:
- wimax_state_change(wimax_dev, WIMAX_ST_READY);
- break;
-
- case I2400M_SS_CONNECTING:
- case I2400M_SS_WIMAX_CONNECTED:
- wimax_state_change(wimax_dev, WIMAX_ST_READY);
- break;
-
- case I2400M_SS_SCAN:
- case I2400M_SS_OUT_OF_ZONE:
- wimax_state_change(wimax_dev, WIMAX_ST_SCANNING);
- break;
-
- case I2400M_SS_IDLE:
- d_printf(1, dev, "entering BS-negotiated idle mode\n");
- fallthrough;
- case I2400M_SS_DISCONNECTING:
- case I2400M_SS_DATA_PATH_CONNECTED:
- wimax_state_change(wimax_dev, WIMAX_ST_CONNECTED);
- break;
-
- default:
- /* Huh? just in case, shut it down */
- dev_err(dev, "HW BUG? unknown state %u: shutting down\n",
- i2400m_state);
- i2400m_reset(i2400m, I2400M_RT_WARM);
- break;
- }
- d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n",
- i2400m, ss, i2400m_state);
-}
-
-
-/*
- * Parse and act on a TLV Media Status sent by the device
- *
- * @i2400m: device descriptor
- * @ms: validated Media Status TLV
- *
- * This will set the carrier up on down based on the device's link
- * report. This is done asides of what the WiMAX stack does based on
- * the device's state as sometimes we need to do a link-renew (the BS
- * wants us to renew a DHCP lease, for example).
- *
- * In fact, doc says that every time we get a link-up, we should do a
- * DHCP negotiation...
- */
-static
-void i2400m_report_tlv_media_status(struct i2400m *i2400m,
- const struct i2400m_tlv_media_status *ms)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct net_device *net_dev = wimax_dev->net_dev;
- enum i2400m_media_status status = le32_to_cpu(ms->media_status);
-
- d_fnstart(3, dev, "(i2400m %p ms %p [%u])\n", i2400m, ms, status);
-
- switch (status) {
- case I2400M_MEDIA_STATUS_LINK_UP:
- netif_carrier_on(net_dev);
- break;
- case I2400M_MEDIA_STATUS_LINK_DOWN:
- netif_carrier_off(net_dev);
- break;
- /*
- * This is the network telling us we need to retrain the DHCP
- * lease -- so far, we are trusting the WiMAX Network Service
- * in user space to pick this up and poke the DHCP client.
- */
- case I2400M_MEDIA_STATUS_LINK_RENEW:
- netif_carrier_on(net_dev);
- break;
- default:
- dev_err(dev, "HW BUG? unknown media status %u\n",
- status);
- }
- d_fnend(3, dev, "(i2400m %p ms %p [%u]) = void\n",
- i2400m, ms, status);
-}
-
-
-/*
- * Process a TLV from a 'state report'
- *
- * @i2400m: device descriptor
- * @tlv: pointer to the TLV header; it has been already validated for
- * consistent size.
- * @tag: for error messages
- *
- * Act on the TLVs from a 'state report'.
- */
-static
-void i2400m_report_state_parse_tlv(struct i2400m *i2400m,
- const struct i2400m_tlv_hdr *tlv,
- const char *tag)
-{
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_tlv_media_status *ms;
- const struct i2400m_tlv_system_state *ss;
- const struct i2400m_tlv_rf_switches_status *rfss;
-
- if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, sizeof(*ss))) {
- ss = container_of(tlv, typeof(*ss), hdr);
- d_printf(2, dev, "%s: system state TLV "
- "found (0x%04x), state 0x%08x\n",
- tag, I2400M_TLV_SYSTEM_STATE,
- le32_to_cpu(ss->state));
- i2400m_report_tlv_system_state(i2400m, ss);
- }
- if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, sizeof(*rfss))) {
- rfss = container_of(tlv, typeof(*rfss), hdr);
- d_printf(2, dev, "%s: RF status TLV "
- "found (0x%04x), sw 0x%02x hw 0x%02x\n",
- tag, I2400M_TLV_RF_STATUS,
- rfss->sw_rf_switch,
- rfss->hw_rf_switch);
- i2400m_report_tlv_rf_switches_status(i2400m, rfss);
- }
- if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, sizeof(*ms))) {
- ms = container_of(tlv, typeof(*ms), hdr);
- d_printf(2, dev, "%s: Media Status TLV: %u\n",
- tag, le32_to_cpu(ms->media_status));
- i2400m_report_tlv_media_status(i2400m, ms);
- }
-}
-
-
-/*
- * Parse a 'state report' and extract information
- *
- * @i2400m: device descriptor
- * @l3l4_hdr: pointer to message; it has been already validated for
- * consistent size.
- * @size: size of the message (header + payload). The header length
- * declaration is assumed to be congruent with @size (as in
- * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
- *
- * Walk over the TLVs in a report state and act on them.
- */
-static
-void i2400m_report_state_hook(struct i2400m *i2400m,
- const struct i2400m_l3l4_hdr *l3l4_hdr,
- size_t size, const char *tag)
-{
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_tlv_hdr *tlv;
- size_t tlv_size = le16_to_cpu(l3l4_hdr->length);
-
- d_fnstart(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n",
- i2400m, l3l4_hdr, size, tag);
- tlv = NULL;
-
- while ((tlv = i2400m_tlv_buffer_walk(i2400m, &l3l4_hdr->pl,
- tlv_size, tlv)))
- i2400m_report_state_parse_tlv(i2400m, tlv, tag);
- d_fnend(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n",
- i2400m, l3l4_hdr, size, tag);
-}
-
-
-/*
- * i2400m_report_hook - (maybe) act on a report
- *
- * @i2400m: device descriptor
- * @l3l4_hdr: pointer to message; it has been already validated for
- * consistent size.
- * @size: size of the message (header + payload). The header length
- * declaration is assumed to be congruent with @size (as in
- * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
- *
- * Extract information we might need (like carrien on/off) from a
- * device report.
- */
-void i2400m_report_hook(struct i2400m *i2400m,
- const struct i2400m_l3l4_hdr *l3l4_hdr, size_t size)
-{
- struct device *dev = i2400m_dev(i2400m);
- unsigned msg_type;
-
- d_fnstart(3, dev, "(i2400m %p l3l4_hdr %p size %zu)\n",
- i2400m, l3l4_hdr, size);
- /* Chew on the message, we might need some information from
- * here */
- msg_type = le16_to_cpu(l3l4_hdr->type);
- switch (msg_type) {
- case I2400M_MT_REPORT_STATE: /* carrier detection... */
- i2400m_report_state_hook(i2400m,
- l3l4_hdr, size, "REPORT STATE");
- break;
- /* If the device is ready for power save, then ask it to do
- * it. */
- case I2400M_MT_REPORT_POWERSAVE_READY: /* zzzzz */
- if (l3l4_hdr->status == cpu_to_le16(I2400M_MS_DONE_OK)) {
- if (i2400m_power_save_disabled)
- d_printf(1, dev, "ready for powersave, "
- "not requesting (disabled by module "
- "parameter)\n");
- else {
- d_printf(1, dev, "ready for powersave, "
- "requesting\n");
- i2400m_cmd_enter_powersave(i2400m);
- }
- }
- break;
- }
- d_fnend(3, dev, "(i2400m %p l3l4_hdr %p size %zu) = void\n",
- i2400m, l3l4_hdr, size);
-}
-
-
-/*
- * i2400m_msg_ack_hook - process cmd/set/get ack for internal status
- *
- * @i2400m: device descriptor
- * @l3l4_hdr: pointer to message; it has been already validated for
- * consistent size.
- * @size: size of the message
- *
- * Extract information we might need from acks to commands and act on
- * it. This is akin to i2400m_report_hook(). Note most of this
- * processing should be done in the function that calls the
- * command. This is here for some cases where it can't happen...
- */
-static void i2400m_msg_ack_hook(struct i2400m *i2400m,
- const struct i2400m_l3l4_hdr *l3l4_hdr,
- size_t size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- unsigned int ack_type;
- char strerr[32];
-
- /* Chew on the message, we might need some information from
- * here */
- ack_type = le16_to_cpu(l3l4_hdr->type);
- switch (ack_type) {
- case I2400M_MT_CMD_ENTER_POWERSAVE:
- /* This is just left here for the sake of example, as
- * the processing is done somewhere else. */
- if (0) {
- result = i2400m_msg_check_status(
- l3l4_hdr, strerr, sizeof(strerr));
- if (result >= 0)
- d_printf(1, dev, "ready for power save: %zd\n",
- size);
- }
- break;
- }
-}
-
-
-/*
- * i2400m_msg_size_check() - verify message size and header are congruent
- *
- * It is ok if the total message size is larger than the expected
- * size, as there can be padding.
- */
-int i2400m_msg_size_check(struct i2400m *i2400m,
- const struct i2400m_l3l4_hdr *l3l4_hdr,
- size_t msg_size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- size_t expected_size;
- d_fnstart(4, dev, "(i2400m %p l3l4_hdr %p msg_size %zu)\n",
- i2400m, l3l4_hdr, msg_size);
- if (msg_size < sizeof(*l3l4_hdr)) {
- dev_err(dev, "bad size for message header "
- "(expected at least %zu, got %zu)\n",
- (size_t) sizeof(*l3l4_hdr), msg_size);
- result = -EIO;
- goto error_hdr_size;
- }
- expected_size = le16_to_cpu(l3l4_hdr->length) + sizeof(*l3l4_hdr);
- if (msg_size < expected_size) {
- dev_err(dev, "bad size for message code 0x%04x (expected %zu, "
- "got %zu)\n", le16_to_cpu(l3l4_hdr->type),
- expected_size, msg_size);
- result = -EIO;
- } else
- result = 0;
-error_hdr_size:
- d_fnend(4, dev,
- "(i2400m %p l3l4_hdr %p msg_size %zu) = %d\n",
- i2400m, l3l4_hdr, msg_size, result);
- return result;
-}
-
-
-
-/*
- * Cancel a wait for a command ACK
- *
- * @i2400m: device descriptor
- * @code: [negative] errno code to cancel with (don't use
- * -EINPROGRESS)
- *
- * If there is an ack already filled out, free it.
- */
-void i2400m_msg_to_dev_cancel_wait(struct i2400m *i2400m, int code)
-{
- struct sk_buff *ack_skb;
- unsigned long flags;
-
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- ack_skb = i2400m->ack_skb;
- if (ack_skb && !IS_ERR(ack_skb))
- kfree_skb(ack_skb);
- i2400m->ack_skb = ERR_PTR(code);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-}
-
-
-/**
- * i2400m_msg_to_dev - Send a control message to the device and get a response
- *
- * @i2400m: device descriptor
- *
- * @buf: pointer to the buffer containing the message to be sent; it
- * has to start with a &struct i2400M_l3l4_hdr and then
- * followed by the payload. Once this function returns, the
- * buffer can be reused.
- *
- * @buf_len: buffer size
- *
- * Returns:
- *
- * Pointer to skb containing the ack message. You need to check the
- * pointer with IS_ERR(), as it might be an error code. Error codes
- * could happen because:
- *
- * - the message wasn't formatted correctly
- * - couldn't send the message
- * - failed waiting for a response
- * - the ack message wasn't formatted correctly
- *
- * The returned skb has been allocated with wimax_msg_to_user_alloc(),
- * it contains the response in a netlink attribute and is ready to be
- * passed up to user space with wimax_msg_to_user_send(). To access
- * the payload and its length, use wimax_msg_{data,len}() on the skb.
- *
- * The skb has to be freed with kfree_skb() once done.
- *
- * Description:
- *
- * This function delivers a message/command to the device and waits
- * for an ack to be received. The format is described in
- * linux/wimax/i2400m.h. In summary, a command/get/set is followed by an
- * ack.
- *
- * This function will not check the ack status, that's left up to the
- * caller. Once done with the ack skb, it has to be kfree_skb()ed.
- *
- * The i2400m handles only one message at the same time, thus we need
- * the mutex to exclude other players.
- *
- * We write the message and then wait for an answer to come back. The
- * RX path intercepts control messages and handles them in
- * i2400m_rx_ctl(). Reports (notifications) are (maybe) processed
- * locally and then forwarded (as needed) to user space on the WiMAX
- * stack message pipe. Acks are saved and passed back to us through an
- * skb in i2400m->ack_skb which is ready to be given to generic
- * netlink if need be.
- */
-struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m,
- const void *buf, size_t buf_len)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_l3l4_hdr *msg_l3l4_hdr;
- struct sk_buff *ack_skb;
- const struct i2400m_l3l4_hdr *ack_l3l4_hdr;
- size_t ack_len;
- int ack_timeout;
- unsigned msg_type;
- unsigned long flags;
-
- d_fnstart(3, dev, "(i2400m %p buf %p len %zu)\n",
- i2400m, buf, buf_len);
-
- rmb(); /* Make sure we see what i2400m_dev_reset_handle() */
- if (i2400m->boot_mode)
- return ERR_PTR(-EL3RST);
-
- msg_l3l4_hdr = buf;
- /* Check msg & payload consistency */
- result = i2400m_msg_size_check(i2400m, msg_l3l4_hdr, buf_len);
- if (result < 0)
- goto error_bad_msg;
- msg_type = le16_to_cpu(msg_l3l4_hdr->type);
- d_printf(1, dev, "CMD/GET/SET 0x%04x %zu bytes\n",
- msg_type, buf_len);
- d_dump(2, dev, buf, buf_len);
-
- /* Setup the completion, ack_skb ("we are waiting") and send
- * the message to the device */
- mutex_lock(&i2400m->msg_mutex);
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- i2400m->ack_skb = ERR_PTR(-EINPROGRESS);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- init_completion(&i2400m->msg_completion);
- result = i2400m_tx(i2400m, buf, buf_len, I2400M_PT_CTRL);
- if (result < 0) {
- dev_err(dev, "can't send message 0x%04x: %d\n",
- le16_to_cpu(msg_l3l4_hdr->type), result);
- goto error_tx;
- }
-
- /* Some commands take longer to execute because of crypto ops,
- * so we give them some more leeway on timeout */
- switch (msg_type) {
- case I2400M_MT_GET_TLS_OPERATION_RESULT:
- case I2400M_MT_CMD_SEND_EAP_RESPONSE:
- ack_timeout = 5 * HZ;
- break;
- default:
- ack_timeout = HZ;
- }
-
- if (unlikely(i2400m->trace_msg_from_user))
- wimax_msg(&i2400m->wimax_dev, "echo", buf, buf_len, GFP_KERNEL);
- /* The RX path in rx.c will put any response for this message
- * in i2400m->ack_skb and wake us up. If we cancel the wait,
- * we need to change the value of i2400m->ack_skb to something
- * not -EINPROGRESS so RX knows there is no one waiting. */
- result = wait_for_completion_interruptible_timeout(
- &i2400m->msg_completion, ack_timeout);
- if (result == 0) {
- dev_err(dev, "timeout waiting for reply to message 0x%04x\n",
- msg_type);
- result = -ETIMEDOUT;
- i2400m_msg_to_dev_cancel_wait(i2400m, result);
- goto error_wait_for_completion;
- } else if (result < 0) {
- dev_err(dev, "error waiting for reply to message 0x%04x: %d\n",
- msg_type, result);
- i2400m_msg_to_dev_cancel_wait(i2400m, result);
- goto error_wait_for_completion;
- }
-
- /* Pull out the ack data from i2400m->ack_skb -- see if it is
- * an error and act accordingly */
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- ack_skb = i2400m->ack_skb;
- if (IS_ERR(ack_skb))
- result = PTR_ERR(ack_skb);
- else
- result = 0;
- i2400m->ack_skb = NULL;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- if (result < 0)
- goto error_ack_status;
- ack_l3l4_hdr = wimax_msg_data_len(ack_skb, &ack_len);
-
- /* Check the ack and deliver it if it is ok */
- if (unlikely(i2400m->trace_msg_from_user))
- wimax_msg(&i2400m->wimax_dev, "echo",
- ack_l3l4_hdr, ack_len, GFP_KERNEL);
- result = i2400m_msg_size_check(i2400m, ack_l3l4_hdr, ack_len);
- if (result < 0) {
- dev_err(dev, "HW BUG? reply to message 0x%04x: %d\n",
- msg_type, result);
- goto error_bad_ack_len;
- }
- if (msg_type != le16_to_cpu(ack_l3l4_hdr->type)) {
- dev_err(dev, "HW BUG? bad reply 0x%04x to message 0x%04x\n",
- le16_to_cpu(ack_l3l4_hdr->type), msg_type);
- result = -EIO;
- goto error_bad_ack_type;
- }
- i2400m_msg_ack_hook(i2400m, ack_l3l4_hdr, ack_len);
- mutex_unlock(&i2400m->msg_mutex);
- d_fnend(3, dev, "(i2400m %p buf %p len %zu) = %p\n",
- i2400m, buf, buf_len, ack_skb);
- return ack_skb;
-
-error_bad_ack_type:
-error_bad_ack_len:
- kfree_skb(ack_skb);
-error_ack_status:
-error_wait_for_completion:
-error_tx:
- mutex_unlock(&i2400m->msg_mutex);
-error_bad_msg:
- d_fnend(3, dev, "(i2400m %p buf %p len %zu) = %d\n",
- i2400m, buf, buf_len, result);
- return ERR_PTR(result);
-}
-
-
-/*
- * Definitions for the Enter Power Save command
- *
- * The Enter Power Save command requests the device to go into power
- * saving mode. The device will ack or nak the command depending on it
- * being ready for it. If it acks, we tell the USB subsystem to
- *
- * As well, the device might request to go into power saving mode by
- * sending a report (REPORT_POWERSAVE_READY), in which case, we issue
- * this command. The hookups in the RX coder allow
- */
-enum {
- I2400M_WAKEUP_ENABLED = 0x01,
- I2400M_WAKEUP_DISABLED = 0x02,
- I2400M_TLV_TYPE_WAKEUP_MODE = 144,
-};
-
-struct i2400m_cmd_enter_power_save {
- struct i2400m_l3l4_hdr hdr;
- struct i2400m_tlv_hdr tlv;
- __le32 val;
-} __packed;
-
-
-/*
- * Request entering power save
- *
- * This command is (mainly) executed when the device indicates that it
- * is ready to go into powersave mode via a REPORT_POWERSAVE_READY.
- */
-int i2400m_cmd_enter_powersave(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_cmd_enter_power_save *cmd;
- char strerr[32];
-
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->hdr.type = cpu_to_le16(I2400M_MT_CMD_ENTER_POWERSAVE);
- cmd->hdr.length = cpu_to_le16(sizeof(*cmd) - sizeof(cmd->hdr));
- cmd->hdr.version = cpu_to_le16(I2400M_L3L4_VERSION);
- cmd->tlv.type = cpu_to_le16(I2400M_TLV_TYPE_WAKEUP_MODE);
- cmd->tlv.length = cpu_to_le16(sizeof(cmd->val));
- cmd->val = cpu_to_le32(I2400M_WAKEUP_ENABLED);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- result = PTR_ERR(ack_skb);
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'Enter power save' command: %d\n",
- result);
- goto error_msg_to_dev;
- }
- result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
- strerr, sizeof(strerr));
- if (result == -EACCES)
- d_printf(1, dev, "Cannot enter power save mode\n");
- else if (result < 0)
- dev_err(dev, "'Enter power save' (0x%04x) command failed: "
- "%d - %s\n", I2400M_MT_CMD_ENTER_POWERSAVE,
- result, strerr);
- else
- d_printf(1, dev, "device ready to power save\n");
- kfree_skb(ack_skb);
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_cmd_enter_powersave);
-
-
-/*
- * Definitions for getting device information
- */
-enum {
- I2400M_TLV_DETAILED_DEVICE_INFO = 140
-};
-
-/**
- * i2400m_get_device_info - Query the device for detailed device information
- *
- * @i2400m: device descriptor
- *
- * Returns: an skb whose skb->data points to a 'struct
- * i2400m_tlv_detailed_device_info'. When done, kfree_skb() it. The
- * skb is *guaranteed* to contain the whole TLV data structure.
- *
- * On error, IS_ERR(skb) is true and ERR_PTR(skb) is the error
- * code.
- */
-struct sk_buff *i2400m_get_device_info(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_l3l4_hdr *cmd;
- const struct i2400m_l3l4_hdr *ack;
- size_t ack_len;
- const struct i2400m_tlv_hdr *tlv;
- const struct i2400m_tlv_detailed_device_info *ddi;
- char strerr[32];
-
- ack_skb = ERR_PTR(-ENOMEM);
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->type = cpu_to_le16(I2400M_MT_GET_DEVICE_INFO);
- cmd->length = 0;
- cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'get device info' command: %ld\n",
- PTR_ERR(ack_skb));
- goto error_msg_to_dev;
- }
- ack = wimax_msg_data_len(ack_skb, &ack_len);
- result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
- if (result < 0) {
- dev_err(dev, "'get device info' (0x%04x) command failed: "
- "%d - %s\n", I2400M_MT_GET_DEVICE_INFO, result,
- strerr);
- goto error_cmd_failed;
- }
- tlv = i2400m_tlv_find(i2400m, ack->pl, ack_len - sizeof(*ack),
- I2400M_TLV_DETAILED_DEVICE_INFO, sizeof(*ddi));
- if (tlv == NULL) {
- dev_err(dev, "GET DEVICE INFO: "
- "detailed device info TLV not found (0x%04x)\n",
- I2400M_TLV_DETAILED_DEVICE_INFO);
- result = -EIO;
- goto error_no_tlv;
- }
- skb_pull(ack_skb, (void *) tlv - (void *) ack_skb->data);
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return ack_skb;
-
-error_no_tlv:
-error_cmd_failed:
- kfree_skb(ack_skb);
- kfree(cmd);
- return ERR_PTR(result);
-}
-
-
-/* Firmware interface versions we support */
-enum {
- I2400M_HDIv_MAJOR = 9,
- I2400M_HDIv_MINOR = 1,
- I2400M_HDIv_MINOR_2 = 2,
-};
-
-
-/**
- * i2400m_firmware_check - check firmware versions are compatible with
- * the driver
- *
- * @i2400m: device descriptor
- *
- * Returns: 0 if ok, < 0 errno code an error and a message in the
- * kernel log.
- *
- * Long function, but quite simple; first chunk launches the command
- * and double checks the reply for the right TLV. Then we process the
- * TLV (where the meat is).
- *
- * Once we process the TLV that gives us the firmware's interface
- * version, we encode it and save it in i2400m->fw_version for future
- * reference.
- */
-int i2400m_firmware_check(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_l3l4_hdr *cmd;
- const struct i2400m_l3l4_hdr *ack;
- size_t ack_len;
- const struct i2400m_tlv_hdr *tlv;
- const struct i2400m_tlv_l4_message_versions *l4mv;
- char strerr[32];
- unsigned major, minor, branch;
-
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->type = cpu_to_le16(I2400M_MT_GET_LM_VERSION);
- cmd->length = 0;
- cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- if (IS_ERR(ack_skb)) {
- result = PTR_ERR(ack_skb);
- dev_err(dev, "Failed to issue 'get lm version' command: %-d\n",
- result);
- goto error_msg_to_dev;
- }
- ack = wimax_msg_data_len(ack_skb, &ack_len);
- result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
- if (result < 0) {
- dev_err(dev, "'get lm version' (0x%04x) command failed: "
- "%d - %s\n", I2400M_MT_GET_LM_VERSION, result,
- strerr);
- goto error_cmd_failed;
- }
- tlv = i2400m_tlv_find(i2400m, ack->pl, ack_len - sizeof(*ack),
- I2400M_TLV_L4_MESSAGE_VERSIONS, sizeof(*l4mv));
- if (tlv == NULL) {
- dev_err(dev, "get lm version: TLV not found (0x%04x)\n",
- I2400M_TLV_L4_MESSAGE_VERSIONS);
- result = -EIO;
- goto error_no_tlv;
- }
- l4mv = container_of(tlv, typeof(*l4mv), hdr);
- major = le16_to_cpu(l4mv->major);
- minor = le16_to_cpu(l4mv->minor);
- branch = le16_to_cpu(l4mv->branch);
- result = -EINVAL;
- if (major != I2400M_HDIv_MAJOR) {
- dev_err(dev, "unsupported major fw version "
- "%u.%u.%u\n", major, minor, branch);
- goto error_bad_major;
- }
- result = 0;
- if (minor > I2400M_HDIv_MINOR_2 || minor < I2400M_HDIv_MINOR)
- dev_warn(dev, "untested minor fw version %u.%u.%u\n",
- major, minor, branch);
- /* Yes, we ignore the branch -- we don't have to track it */
- i2400m->fw_version = major << 16 | minor;
- dev_info(dev, "firmware interface version %u.%u.%u\n",
- major, minor, branch);
-error_bad_major:
-error_no_tlv:
-error_cmd_failed:
- kfree_skb(ack_skb);
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return result;
-}
-
-
-/*
- * Send an DoExitIdle command to the device to ask it to go out of
- * basestation-idle mode.
- *
- * @i2400m: device descriptor
- *
- * This starts a renegotiation with the basestation that might involve
- * another crypto handshake with user space.
- *
- * Returns: 0 if ok, < 0 errno code on error.
- */
-int i2400m_cmd_exit_idle(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_l3l4_hdr *cmd;
- char strerr[32];
-
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->type = cpu_to_le16(I2400M_MT_CMD_EXIT_IDLE);
- cmd->length = 0;
- cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- result = PTR_ERR(ack_skb);
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'exit idle' command: %d\n",
- result);
- goto error_msg_to_dev;
- }
- result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
- strerr, sizeof(strerr));
- kfree_skb(ack_skb);
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return result;
-
-}
-
-
-/*
- * Query the device for its state, update the WiMAX stack's idea of it
- *
- * @i2400m: device descriptor
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * Executes a 'Get State' command and parses the returned
- * TLVs.
- *
- * Because this is almost identical to a 'Report State', we use
- * i2400m_report_state_hook() to parse the answer. This will set the
- * carrier state, as well as the RF Kill switches state.
- */
-static int i2400m_cmd_get_state(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_l3l4_hdr *cmd;
- const struct i2400m_l3l4_hdr *ack;
- size_t ack_len;
- char strerr[32];
-
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->type = cpu_to_le16(I2400M_MT_GET_STATE);
- cmd->length = 0;
- cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'get state' command: %ld\n",
- PTR_ERR(ack_skb));
- result = PTR_ERR(ack_skb);
- goto error_msg_to_dev;
- }
- ack = wimax_msg_data_len(ack_skb, &ack_len);
- result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
- if (result < 0) {
- dev_err(dev, "'get state' (0x%04x) command failed: "
- "%d - %s\n", I2400M_MT_GET_STATE, result, strerr);
- goto error_cmd_failed;
- }
- i2400m_report_state_hook(i2400m, ack, ack_len - sizeof(*ack),
- "GET STATE");
- result = 0;
- kfree_skb(ack_skb);
-error_cmd_failed:
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return result;
-}
-
-/**
- * Set basic configuration settings
- *
- * @i2400m: device descriptor
- * @arg: array of pointers to the TLV headers to send for
- * configuration (each followed by its payload).
- * TLV headers and payloads must be properly initialized, with the
- * right endianess (LE).
- * @args: number of pointers in the @arg array
- */
-static int i2400m_set_init_config(struct i2400m *i2400m,
- const struct i2400m_tlv_hdr **arg,
- size_t args)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct i2400m_l3l4_hdr *cmd;
- char strerr[32];
- unsigned argc, argsize, tlv_size;
- const struct i2400m_tlv_hdr *tlv_hdr;
- void *buf, *itr;
-
- d_fnstart(3, dev, "(i2400m %p arg %p args %zu)\n", i2400m, arg, args);
- result = 0;
- if (args == 0)
- goto none;
- /* Compute the size of all the TLVs, so we can alloc a
- * contiguous command block to copy them. */
- argsize = 0;
- for (argc = 0; argc < args; argc++) {
- tlv_hdr = arg[argc];
- argsize += sizeof(*tlv_hdr) + le16_to_cpu(tlv_hdr->length);
- }
- WARN_ON(argc >= 9); /* As per hw spec */
-
- /* Alloc the space for the command and TLVs*/
- result = -ENOMEM;
- buf = kzalloc(sizeof(*cmd) + argsize, GFP_KERNEL);
- if (buf == NULL)
- goto error_alloc;
- cmd = buf;
- cmd->type = cpu_to_le16(I2400M_MT_SET_INIT_CONFIG);
- cmd->length = cpu_to_le16(argsize);
- cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- /* Copy the TLVs */
- itr = buf + sizeof(*cmd);
- for (argc = 0; argc < args; argc++) {
- tlv_hdr = arg[argc];
- tlv_size = sizeof(*tlv_hdr) + le16_to_cpu(tlv_hdr->length);
- memcpy(itr, tlv_hdr, tlv_size);
- itr += tlv_size;
- }
-
- /* Send the message! */
- ack_skb = i2400m_msg_to_dev(i2400m, buf, sizeof(*cmd) + argsize);
- result = PTR_ERR(ack_skb);
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'init config' command: %d\n",
- result);
-
- goto error_msg_to_dev;
- }
- result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
- strerr, sizeof(strerr));
- if (result < 0)
- dev_err(dev, "'init config' (0x%04x) command failed: %d - %s\n",
- I2400M_MT_SET_INIT_CONFIG, result, strerr);
- kfree_skb(ack_skb);
-error_msg_to_dev:
- kfree(buf);
-error_alloc:
-none:
- d_fnend(3, dev, "(i2400m %p arg %p args %zu) = %d\n",
- i2400m, arg, args, result);
- return result;
-
-}
-
-/**
- * i2400m_set_idle_timeout - Set the device's idle mode timeout
- *
- * @i2400m: i2400m device descriptor
- *
- * @msecs: milliseconds for the timeout to enter idle mode. Between
- * 100 to 300000 (5m); 0 to disable. In increments of 100.
- *
- * After this @msecs of the link being idle (no data being sent or
- * received), the device will negotiate with the basestation entering
- * idle mode for saving power. The connection is maintained, but
- * getting out of it (done in tx.c) will require some negotiation,
- * possible crypto re-handshake and a possible DHCP re-lease.
- *
- * Only available if fw_version >= 0x00090002.
- *
- * Returns: 0 if ok, < 0 errno code on error.
- */
-int i2400m_set_idle_timeout(struct i2400m *i2400m, unsigned msecs)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct {
- struct i2400m_l3l4_hdr hdr;
- struct i2400m_tlv_config_idle_timeout cit;
- } *cmd;
- const struct i2400m_l3l4_hdr *ack;
- size_t ack_len;
- char strerr[32];
-
- result = -ENOSYS;
- if (i2400m_le_v1_3(i2400m))
- goto error_alloc;
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->hdr.type = cpu_to_le16(I2400M_MT_GET_STATE);
- cmd->hdr.length = cpu_to_le16(sizeof(*cmd) - sizeof(cmd->hdr));
- cmd->hdr.version = cpu_to_le16(I2400M_L3L4_VERSION);
-
- cmd->cit.hdr.type =
- cpu_to_le16(I2400M_TLV_CONFIG_IDLE_TIMEOUT);
- cmd->cit.hdr.length = cpu_to_le16(sizeof(cmd->cit.timeout));
- cmd->cit.timeout = cpu_to_le32(msecs);
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'set idle timeout' command: "
- "%ld\n", PTR_ERR(ack_skb));
- result = PTR_ERR(ack_skb);
- goto error_msg_to_dev;
- }
- ack = wimax_msg_data_len(ack_skb, &ack_len);
- result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
- if (result < 0) {
- dev_err(dev, "'set idle timeout' (0x%04x) command failed: "
- "%d - %s\n", I2400M_MT_GET_STATE, result, strerr);
- goto error_cmd_failed;
- }
- result = 0;
- kfree_skb(ack_skb);
-error_cmd_failed:
-error_msg_to_dev:
- kfree(cmd);
-error_alloc:
- return result;
-}
-
-
-/**
- * i2400m_dev_initialize - Initialize the device once communications are ready
- *
- * @i2400m: device descriptor
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * Configures the device to work the way we like it.
- *
- * At the point of this call, the device is registered with the WiMAX
- * and netdev stacks, firmware is uploaded and we can talk to the
- * device normally.
- */
-int i2400m_dev_initialize(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_tlv_config_idle_parameters idle_params;
- struct i2400m_tlv_config_idle_timeout idle_timeout;
- struct i2400m_tlv_config_d2h_data_format df;
- struct i2400m_tlv_config_dl_host_reorder dlhr;
- const struct i2400m_tlv_hdr *args[9];
- unsigned argc = 0;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- if (i2400m_passive_mode)
- goto out_passive;
- /* Disable idle mode? (enabled by default) */
- if (i2400m_idle_mode_disabled) {
- if (i2400m_le_v1_3(i2400m)) {
- idle_params.hdr.type =
- cpu_to_le16(I2400M_TLV_CONFIG_IDLE_PARAMETERS);
- idle_params.hdr.length = cpu_to_le16(
- sizeof(idle_params) - sizeof(idle_params.hdr));
- idle_params.idle_timeout = 0;
- idle_params.idle_paging_interval = 0;
- args[argc++] = &idle_params.hdr;
- } else {
- idle_timeout.hdr.type =
- cpu_to_le16(I2400M_TLV_CONFIG_IDLE_TIMEOUT);
- idle_timeout.hdr.length = cpu_to_le16(
- sizeof(idle_timeout) - sizeof(idle_timeout.hdr));
- idle_timeout.timeout = 0;
- args[argc++] = &idle_timeout.hdr;
- }
- }
- if (i2400m_ge_v1_4(i2400m)) {
- /* Enable extended RX data format? */
- df.hdr.type =
- cpu_to_le16(I2400M_TLV_CONFIG_D2H_DATA_FORMAT);
- df.hdr.length = cpu_to_le16(
- sizeof(df) - sizeof(df.hdr));
- df.format = 1;
- args[argc++] = &df.hdr;
-
- /* Enable RX data reordering?
- * (switch flipped in rx.c:i2400m_rx_setup() after fw upload) */
- if (i2400m->rx_reorder) {
- dlhr.hdr.type =
- cpu_to_le16(I2400M_TLV_CONFIG_DL_HOST_REORDER);
- dlhr.hdr.length = cpu_to_le16(
- sizeof(dlhr) - sizeof(dlhr.hdr));
- dlhr.reorder = 1;
- args[argc++] = &dlhr.hdr;
- }
- }
- result = i2400m_set_init_config(i2400m, args, argc);
- if (result < 0)
- goto error;
-out_passive:
- /*
- * Update state: Here it just calls a get state; parsing the
- * result (System State TLV and RF Status TLV [done in the rx
- * path hooks]) will set the hardware and software RF-Kill
- * status.
- */
- result = i2400m_cmd_get_state(i2400m);
-error:
- if (result < 0)
- dev_err(dev, "failed to initialize the device: %d\n", result);
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-}
-
-
-/**
- * i2400m_dev_shutdown - Shutdown a running device
- *
- * @i2400m: device descriptor
- *
- * Release resources acquired during the running of the device; in
- * theory, should also tell the device to go to sleep, switch off the
- * radio, all that, but at this point, in most cases (driver
- * disconnection, reset handling) we can't even talk to the device.
- */
-void i2400m_dev_shutdown(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
diff --git a/drivers/staging/wimax/i2400m/debug-levels.h b/drivers/staging/wimax/i2400m/debug-levels.h
deleted file mode 100644
index a317e9fbb734..000000000000
--- a/drivers/staging/wimax/i2400m/debug-levels.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Debug levels control file for the i2400m module
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-#ifndef __debug_levels__h__
-#define __debug_levels__h__
-
-/* Maximum compile and run time debug level for all submodules */
-#define D_MODULENAME i2400m
-#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
-
-#include "../linux-wimax-debug.h"
-
-/* List of all the enabled modules */
-enum d_module {
- D_SUBMODULE_DECLARE(control),
- D_SUBMODULE_DECLARE(driver),
- D_SUBMODULE_DECLARE(debugfs),
- D_SUBMODULE_DECLARE(fw),
- D_SUBMODULE_DECLARE(netdev),
- D_SUBMODULE_DECLARE(rfkill),
- D_SUBMODULE_DECLARE(rx),
- D_SUBMODULE_DECLARE(sysfs),
- D_SUBMODULE_DECLARE(tx),
-};
-
-
-#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/staging/wimax/i2400m/debugfs.c b/drivers/staging/wimax/i2400m/debugfs.c
deleted file mode 100644
index 1c640b41ea4c..000000000000
--- a/drivers/staging/wimax/i2400m/debugfs.c
+++ /dev/null
@@ -1,253 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Debugfs interfaces to manipulate driver and device information
- *
- * Copyright (C) 2007 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-
-#include <linux/debugfs.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/export.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE debugfs
-#include "debug-levels.h"
-
-static
-int debugfs_netdev_queue_stopped_get(void *data, u64 *val)
-{
- struct i2400m *i2400m = data;
- *val = netif_queue_stopped(i2400m->wimax_dev.net_dev);
- return 0;
-}
-DEFINE_DEBUGFS_ATTRIBUTE(fops_netdev_queue_stopped,
- debugfs_netdev_queue_stopped_get,
- NULL, "%llu\n");
-
-/*
- * We don't allow partial reads of this file, as then the reader would
- * get weirdly confused data as it is updated.
- *
- * So or you read it all or nothing; if you try to read with an offset
- * != 0, we consider you are done reading.
- */
-static
-ssize_t i2400m_rx_stats_read(struct file *filp, char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct i2400m *i2400m = filp->private_data;
- char buf[128];
- unsigned long flags;
-
- if (*ppos != 0)
- return 0;
- if (count < sizeof(buf))
- return -ENOSPC;
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
- i2400m->rx_pl_num, i2400m->rx_pl_min,
- i2400m->rx_pl_max, i2400m->rx_num,
- i2400m->rx_size_acc,
- i2400m->rx_size_min, i2400m->rx_size_max);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
-}
-
-
-/* Any write clears the stats */
-static
-ssize_t i2400m_rx_stats_write(struct file *filp, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct i2400m *i2400m = filp->private_data;
- unsigned long flags;
-
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- i2400m->rx_pl_num = 0;
- i2400m->rx_pl_max = 0;
- i2400m->rx_pl_min = UINT_MAX;
- i2400m->rx_num = 0;
- i2400m->rx_size_acc = 0;
- i2400m->rx_size_min = UINT_MAX;
- i2400m->rx_size_max = 0;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- return count;
-}
-
-static
-const struct file_operations i2400m_rx_stats_fops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = i2400m_rx_stats_read,
- .write = i2400m_rx_stats_write,
- .llseek = default_llseek,
-};
-
-
-/* See i2400m_rx_stats_read() */
-static
-ssize_t i2400m_tx_stats_read(struct file *filp, char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct i2400m *i2400m = filp->private_data;
- char buf[128];
- unsigned long flags;
-
- if (*ppos != 0)
- return 0;
- if (count < sizeof(buf))
- return -ENOSPC;
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
- i2400m->tx_pl_num, i2400m->tx_pl_min,
- i2400m->tx_pl_max, i2400m->tx_num,
- i2400m->tx_size_acc,
- i2400m->tx_size_min, i2400m->tx_size_max);
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
-}
-
-/* Any write clears the stats */
-static
-ssize_t i2400m_tx_stats_write(struct file *filp, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct i2400m *i2400m = filp->private_data;
- unsigned long flags;
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- i2400m->tx_pl_num = 0;
- i2400m->tx_pl_max = 0;
- i2400m->tx_pl_min = UINT_MAX;
- i2400m->tx_num = 0;
- i2400m->tx_size_acc = 0;
- i2400m->tx_size_min = UINT_MAX;
- i2400m->tx_size_max = 0;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- return count;
-}
-
-static
-const struct file_operations i2400m_tx_stats_fops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = i2400m_tx_stats_read,
- .write = i2400m_tx_stats_write,
- .llseek = default_llseek,
-};
-
-
-/* Write 1 to ask the device to go into suspend */
-static
-int debugfs_i2400m_suspend_set(void *data, u64 val)
-{
- int result;
- struct i2400m *i2400m = data;
- result = i2400m_cmd_enter_powersave(i2400m);
- if (result >= 0)
- result = 0;
- return result;
-}
-DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_suspend,
- NULL, debugfs_i2400m_suspend_set,
- "%llu\n");
-
-/*
- * Reset the device
- *
- * Write 0 to ask the device to soft reset, 1 to cold reset, 2 to bus
- * reset (as defined by enum i2400m_reset_type).
- */
-static
-int debugfs_i2400m_reset_set(void *data, u64 val)
-{
- int result;
- struct i2400m *i2400m = data;
- enum i2400m_reset_type rt = val;
- switch(rt) {
- case I2400M_RT_WARM:
- case I2400M_RT_COLD:
- case I2400M_RT_BUS:
- result = i2400m_reset(i2400m, rt);
- if (result >= 0)
- result = 0;
- break;
- default:
- result = -EINVAL;
- }
- return result;
-}
-DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_reset,
- NULL, debugfs_i2400m_reset_set,
- "%llu\n");
-
-void i2400m_debugfs_add(struct i2400m *i2400m)
-{
- struct dentry *dentry = i2400m->wimax_dev.debugfs_dentry;
-
- dentry = debugfs_create_dir("i2400m", dentry);
- i2400m->debugfs_dentry = dentry;
-
- d_level_register_debugfs("dl_", control, dentry);
- d_level_register_debugfs("dl_", driver, dentry);
- d_level_register_debugfs("dl_", debugfs, dentry);
- d_level_register_debugfs("dl_", fw, dentry);
- d_level_register_debugfs("dl_", netdev, dentry);
- d_level_register_debugfs("dl_", rfkill, dentry);
- d_level_register_debugfs("dl_", rx, dentry);
- d_level_register_debugfs("dl_", tx, dentry);
-
- debugfs_create_size_t("tx_in", 0400, dentry, &i2400m->tx_in);
- debugfs_create_size_t("tx_out", 0400, dentry, &i2400m->tx_out);
- debugfs_create_u32("state", 0600, dentry, &i2400m->state);
-
- /*
- * Trace received messages from user space
- *
- * In order to tap the bidirectional message stream in the
- * 'msg' pipe, user space can read from the 'msg' pipe;
- * however, due to limitations in libnl, we can't know what
- * the different applications are sending down to the kernel.
- *
- * So we have this hack where the driver will echo any message
- * received on the msg pipe from user space [through a call to
- * wimax_dev->op_msg_from_user() into
- * i2400m_op_msg_from_user()] into the 'trace' pipe that this
- * driver creates.
- *
- * So then, reading from both the 'trace' and 'msg' pipes in
- * user space will provide a full dump of the traffic.
- *
- * Write 1 to activate, 0 to clear.
- *
- * It is not really very atomic, but it is also not too
- * critical.
- */
- debugfs_create_u8("trace_msg_from_user", 0600, dentry,
- &i2400m->trace_msg_from_user);
-
- debugfs_create_file("netdev_queue_stopped", 0400, dentry, i2400m,
- &fops_netdev_queue_stopped);
-
- debugfs_create_file("rx_stats", 0600, dentry, i2400m,
- &i2400m_rx_stats_fops);
-
- debugfs_create_file("tx_stats", 0600, dentry, i2400m,
- &i2400m_tx_stats_fops);
-
- debugfs_create_file("suspend", 0200, dentry, i2400m,
- &fops_i2400m_suspend);
-
- debugfs_create_file("reset", 0200, dentry, i2400m, &fops_i2400m_reset);
-}
-
-void i2400m_debugfs_rm(struct i2400m *i2400m)
-{
- debugfs_remove_recursive(i2400m->debugfs_dentry);
-}
diff --git a/drivers/staging/wimax/i2400m/driver.c b/drivers/staging/wimax/i2400m/driver.c
deleted file mode 100644
index 8091106212f9..000000000000
--- a/drivers/staging/wimax/i2400m/driver.c
+++ /dev/null
@@ -1,1003 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Generic probe/disconnect, reset and message passing
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * See i2400m.h for driver documentation. This contains helpers for
- * the driver model glue [_setup()/_release()], handling device resets
- * [_dev_reset_handle()], and the backends for the WiMAX stack ops
- * reset [_op_reset()] and message from user [_op_msg_from_user()].
- *
- * ROADMAP:
- *
- * i2400m_op_msg_from_user()
- * i2400m_msg_to_dev()
- * wimax_msg_to_user_send()
- *
- * i2400m_op_reset()
- * i240m->bus_reset()
- *
- * i2400m_dev_reset_handle()
- * __i2400m_dev_reset_handle()
- * __i2400m_dev_stop()
- * __i2400m_dev_start()
- *
- * i2400m_setup()
- * i2400m->bus_setup()
- * i2400m_bootrom_init()
- * register_netdev()
- * wimax_dev_add()
- * i2400m_dev_start()
- * __i2400m_dev_start()
- * i2400m_dev_bootstrap()
- * i2400m_tx_setup()
- * i2400m->bus_dev_start()
- * i2400m_firmware_check()
- * i2400m_check_mac_addr()
- *
- * i2400m_release()
- * i2400m_dev_stop()
- * __i2400m_dev_stop()
- * i2400m_dev_shutdown()
- * i2400m->bus_dev_stop()
- * i2400m_tx_release()
- * i2400m->bus_release()
- * wimax_dev_rm()
- * unregister_netdev()
- */
-#include "i2400m.h"
-#include <linux/etherdevice.h>
-#include "linux-wimax-i2400m.h"
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/suspend.h>
-#include <linux/slab.h>
-
-#define D_SUBMODULE driver
-#include "debug-levels.h"
-
-
-static char i2400m_debug_params[128];
-module_param_string(debug, i2400m_debug_params, sizeof(i2400m_debug_params),
- 0644);
-MODULE_PARM_DESC(debug,
- "String of space-separated NAME:VALUE pairs, where NAMEs "
- "are the different debug submodules and VALUE are the "
- "initial debug value to set.");
-
-static char i2400m_barkers_params[128];
-module_param_string(barkers, i2400m_barkers_params,
- sizeof(i2400m_barkers_params), 0644);
-MODULE_PARM_DESC(barkers,
- "String of comma-separated 32-bit values; each is "
- "recognized as the value the device sends as a reboot "
- "signal; values are appended to a list--setting one value "
- "as zero cleans the existing list and starts a new one.");
-
-/*
- * WiMAX stack operation: relay a message from user space
- *
- * @wimax_dev: device descriptor
- * @pipe_name: named pipe the message is for
- * @msg_buf: pointer to the message bytes
- * @msg_len: length of the buffer
- * @genl_info: passed by the generic netlink layer
- *
- * The WiMAX stack will call this function when a message was received
- * from user space.
- *
- * For the i2400m, this is an L3L4 message, as specified in
- * include/linux/wimax/i2400m.h, and thus prefixed with a 'struct
- * i2400m_l3l4_hdr'. Driver (and device) expect the messages to be
- * coded in Little Endian.
- *
- * This function just verifies that the header declaration and the
- * payload are consistent and then deals with it, either forwarding it
- * to the device or processing it locally.
- *
- * In the i2400m, messages are basically commands that will carry an
- * ack, so we use i2400m_msg_to_dev() and then deliver the ack back to
- * user space. The rx.c code might intercept the response and use it
- * to update the driver's state, but then it will pass it on so it can
- * be relayed back to user space.
- *
- * Note that asynchronous events from the device are processed and
- * sent to user space in rx.c.
- */
-static
-int i2400m_op_msg_from_user(struct wimax_dev *wimax_dev,
- const char *pipe_name,
- const void *msg_buf, size_t msg_len,
- const struct genl_info *genl_info)
-{
- int result;
- struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
-
- d_fnstart(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p "
- "msg_len %zu genl_info %p)\n", wimax_dev, i2400m,
- msg_buf, msg_len, genl_info);
- ack_skb = i2400m_msg_to_dev(i2400m, msg_buf, msg_len);
- result = PTR_ERR(ack_skb);
- if (IS_ERR(ack_skb))
- goto error_msg_to_dev;
- result = wimax_msg_send(&i2400m->wimax_dev, ack_skb);
-error_msg_to_dev:
- d_fnend(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p msg_len %zu "
- "genl_info %p) = %d\n", wimax_dev, i2400m, msg_buf, msg_len,
- genl_info, result);
- return result;
-}
-
-
-/*
- * Context to wait for a reset to finalize
- */
-struct i2400m_reset_ctx {
- struct completion completion;
- int result;
-};
-
-
-/*
- * WiMAX stack operation: reset a device
- *
- * @wimax_dev: device descriptor
- *
- * See the documentation for wimax_reset() and wimax_dev->op_reset for
- * the requirements of this function. The WiMAX stack guarantees
- * serialization on calls to this function.
- *
- * Do a warm reset on the device; if it fails, resort to a cold reset
- * and return -ENODEV. On successful warm reset, we need to block
- * until it is complete.
- *
- * The bus-driver implementation of reset takes care of falling back
- * to cold reset if warm fails.
- */
-static
-int i2400m_op_reset(struct wimax_dev *wimax_dev)
-{
- int result;
- struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_reset_ctx ctx = {
- .completion = COMPLETION_INITIALIZER_ONSTACK(ctx.completion),
- .result = 0,
- };
-
- d_fnstart(4, dev, "(wimax_dev %p)\n", wimax_dev);
- mutex_lock(&i2400m->init_mutex);
- i2400m->reset_ctx = &ctx;
- mutex_unlock(&i2400m->init_mutex);
- result = i2400m_reset(i2400m, I2400M_RT_WARM);
- if (result < 0)
- goto out;
- result = wait_for_completion_timeout(&ctx.completion, 4*HZ);
- if (result == 0)
- result = -ETIMEDOUT;
- else if (result > 0)
- result = ctx.result;
- /* if result < 0, pass it on */
- mutex_lock(&i2400m->init_mutex);
- i2400m->reset_ctx = NULL;
- mutex_unlock(&i2400m->init_mutex);
-out:
- d_fnend(4, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
- return result;
-}
-
-
-/*
- * Check the MAC address we got from boot mode is ok
- *
- * @i2400m: device descriptor
- *
- * Returns: 0 if ok, < 0 errno code on error.
- */
-static
-int i2400m_check_mac_addr(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb;
- const struct i2400m_tlv_detailed_device_info *ddi;
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- skb = i2400m_get_device_info(i2400m);
- if (IS_ERR(skb)) {
- result = PTR_ERR(skb);
- dev_err(dev, "Cannot verify MAC address, error reading: %d\n",
- result);
- goto error;
- }
- /* Extract MAC address */
- ddi = (void *) skb->data;
- BUILD_BUG_ON(ETH_ALEN != sizeof(ddi->mac_address));
- d_printf(2, dev, "GET DEVICE INFO: mac addr %pM\n",
- ddi->mac_address);
- if (!memcmp(net_dev->perm_addr, ddi->mac_address,
- sizeof(ddi->mac_address)))
- goto ok;
- dev_warn(dev, "warning: device reports a different MAC address "
- "to that of boot mode's\n");
- dev_warn(dev, "device reports %pM\n", ddi->mac_address);
- dev_warn(dev, "boot mode reported %pM\n", net_dev->perm_addr);
- if (is_zero_ether_addr(ddi->mac_address))
- dev_err(dev, "device reports an invalid MAC address, "
- "not updating\n");
- else {
- dev_warn(dev, "updating MAC address\n");
- net_dev->addr_len = ETH_ALEN;
- memcpy(net_dev->perm_addr, ddi->mac_address, ETH_ALEN);
- memcpy(net_dev->dev_addr, ddi->mac_address, ETH_ALEN);
- }
-ok:
- result = 0;
- kfree_skb(skb);
-error:
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-}
-
-
-/**
- * __i2400m_dev_start - Bring up driver communication with the device
- *
- * @i2400m: device descriptor
- * @flags: boot mode flags
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * Uploads firmware and brings up all the resources needed to be able
- * to communicate with the device.
- *
- * The workqueue has to be setup early, at least before RX handling
- * (it's only real user for now) so it can process reports as they
- * arrive. We also want to destroy it if we retry, to make sure it is
- * flushed...easier like this.
- *
- * TX needs to be setup before the bus-specific code (otherwise on
- * shutdown, the bus-tx code could try to access it).
- */
-static
-int __i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri flags)
-{
- int result;
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct net_device *net_dev = wimax_dev->net_dev;
- struct device *dev = i2400m_dev(i2400m);
- int times = i2400m->bus_bm_retries;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
-retry:
- result = i2400m_dev_bootstrap(i2400m, flags);
- if (result < 0) {
- dev_err(dev, "cannot bootstrap device: %d\n", result);
- goto error_bootstrap;
- }
- result = i2400m_tx_setup(i2400m);
- if (result < 0)
- goto error_tx_setup;
- result = i2400m_rx_setup(i2400m);
- if (result < 0)
- goto error_rx_setup;
- i2400m->work_queue = create_singlethread_workqueue(wimax_dev->name);
- if (i2400m->work_queue == NULL) {
- result = -ENOMEM;
- dev_err(dev, "cannot create workqueue\n");
- goto error_create_workqueue;
- }
- if (i2400m->bus_dev_start) {
- result = i2400m->bus_dev_start(i2400m);
- if (result < 0)
- goto error_bus_dev_start;
- }
- i2400m->ready = 1;
- wmb(); /* see i2400m->ready's documentation */
- /* process pending reports from the device */
- queue_work(i2400m->work_queue, &i2400m->rx_report_ws);
- result = i2400m_firmware_check(i2400m); /* fw versions ok? */
- if (result < 0)
- goto error_fw_check;
- /* At this point is ok to send commands to the device */
- result = i2400m_check_mac_addr(i2400m);
- if (result < 0)
- goto error_check_mac_addr;
- result = i2400m_dev_initialize(i2400m);
- if (result < 0)
- goto error_dev_initialize;
-
- /* We don't want any additional unwanted error recovery triggered
- * from any other context so if anything went wrong before we come
- * here, let's keep i2400m->error_recovery untouched and leave it to
- * dev_reset_handle(). See dev_reset_handle(). */
-
- atomic_dec(&i2400m->error_recovery);
- /* Every thing works so far, ok, now we are ready to
- * take error recovery if it's required. */
-
- /* At this point, reports will come for the device and set it
- * to the right state if it is different than UNINITIALIZED */
- d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
- net_dev, i2400m, result);
- return result;
-
-error_dev_initialize:
-error_check_mac_addr:
-error_fw_check:
- i2400m->ready = 0;
- wmb(); /* see i2400m->ready's documentation */
- flush_workqueue(i2400m->work_queue);
- if (i2400m->bus_dev_stop)
- i2400m->bus_dev_stop(i2400m);
-error_bus_dev_start:
- destroy_workqueue(i2400m->work_queue);
-error_create_workqueue:
- i2400m_rx_release(i2400m);
-error_rx_setup:
- i2400m_tx_release(i2400m);
-error_tx_setup:
-error_bootstrap:
- if (result == -EL3RST && times-- > 0) {
- flags = I2400M_BRI_SOFT|I2400M_BRI_MAC_REINIT;
- goto retry;
- }
- d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
- net_dev, i2400m, result);
- return result;
-}
-
-
-static
-int i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri bm_flags)
-{
- int result = 0;
- mutex_lock(&i2400m->init_mutex); /* Well, start the device */
- if (i2400m->updown == 0) {
- result = __i2400m_dev_start(i2400m, bm_flags);
- if (result >= 0) {
- i2400m->updown = 1;
- i2400m->alive = 1;
- wmb();/* see i2400m->updown and i2400m->alive's doc */
- }
- }
- mutex_unlock(&i2400m->init_mutex);
- return result;
-}
-
-
-/**
- * i2400m_dev_stop - Tear down driver communication with the device
- *
- * @i2400m: device descriptor
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * Releases all the resources allocated to communicate with the
- * device. Note we cannot destroy the workqueue earlier as until RX is
- * fully destroyed, it could still try to schedule jobs.
- */
-static
-void __i2400m_dev_stop(struct i2400m *i2400m)
-{
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING);
- i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST);
- complete(&i2400m->msg_completion);
- i2400m_net_wake_stop(i2400m);
- i2400m_dev_shutdown(i2400m);
- /*
- * Make sure no report hooks are running *before* we stop the
- * communication infrastructure with the device.
- */
- i2400m->ready = 0; /* nobody can queue work anymore */
- wmb(); /* see i2400m->ready's documentation */
- flush_workqueue(i2400m->work_queue);
-
- if (i2400m->bus_dev_stop)
- i2400m->bus_dev_stop(i2400m);
- destroy_workqueue(i2400m->work_queue);
- i2400m_rx_release(i2400m);
- i2400m_tx_release(i2400m);
- wimax_state_change(wimax_dev, WIMAX_ST_DOWN);
- d_fnend(3, dev, "(i2400m %p) = 0\n", i2400m);
-}
-
-
-/*
- * Watch out -- we only need to stop if there is a need for it. The
- * device could have reset itself and failed to come up again (see
- * _i2400m_dev_reset_handle()).
- */
-static
-void i2400m_dev_stop(struct i2400m *i2400m)
-{
- mutex_lock(&i2400m->init_mutex);
- if (i2400m->updown) {
- __i2400m_dev_stop(i2400m);
- i2400m->updown = 0;
- i2400m->alive = 0;
- wmb(); /* see i2400m->updown and i2400m->alive's doc */
- }
- mutex_unlock(&i2400m->init_mutex);
-}
-
-
-/*
- * Listen to PM events to cache the firmware before suspend/hibernation
- *
- * When the device comes out of suspend, it might go into reset and
- * firmware has to be uploaded again. At resume, most of the times, we
- * can't load firmware images from disk, so we need to cache it.
- *
- * i2400m_fw_cache() will allocate a kobject and attach the firmware
- * to it; that way we don't have to worry too much about the fw loader
- * hitting a race condition.
- *
- * Note: modus operandi stolen from the Orinoco driver; thx.
- */
-static
-int i2400m_pm_notifier(struct notifier_block *notifier,
- unsigned long pm_event,
- void *unused)
-{
- struct i2400m *i2400m =
- container_of(notifier, struct i2400m, pm_notifier);
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p pm_event %lx)\n", i2400m, pm_event);
- switch (pm_event) {
- case PM_HIBERNATION_PREPARE:
- case PM_SUSPEND_PREPARE:
- i2400m_fw_cache(i2400m);
- break;
- case PM_POST_RESTORE:
- /* Restore from hibernation failed. We need to clean
- * up in exactly the same way, so fall through. */
- case PM_POST_HIBERNATION:
- case PM_POST_SUSPEND:
- i2400m_fw_uncache(i2400m);
- break;
-
- case PM_RESTORE_PREPARE:
- default:
- break;
- }
- d_fnend(3, dev, "(i2400m %p pm_event %lx) = void\n", i2400m, pm_event);
- return NOTIFY_DONE;
-}
-
-
-/*
- * pre-reset is called before a device is going on reset
- *
- * This has to be followed by a call to i2400m_post_reset(), otherwise
- * bad things might happen.
- */
-int i2400m_pre_reset(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- d_printf(1, dev, "pre-reset shut down\n");
-
- mutex_lock(&i2400m->init_mutex);
- if (i2400m->updown) {
- netif_tx_disable(i2400m->wimax_dev.net_dev);
- __i2400m_dev_stop(i2400m);
- /* down't set updown to zero -- this way
- * post_reset can restore properly */
- }
- mutex_unlock(&i2400m->init_mutex);
- if (i2400m->bus_release)
- i2400m->bus_release(i2400m);
- d_fnend(3, dev, "(i2400m %p) = 0\n", i2400m);
- return 0;
-}
-EXPORT_SYMBOL_GPL(i2400m_pre_reset);
-
-
-/*
- * Restore device state after a reset
- *
- * Do the work needed after a device reset to bring it up to the same
- * state as it was before the reset.
- *
- * NOTE: this requires i2400m->init_mutex taken
- */
-int i2400m_post_reset(struct i2400m *i2400m)
-{
- int result = 0;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- d_printf(1, dev, "post-reset start\n");
- if (i2400m->bus_setup) {
- result = i2400m->bus_setup(i2400m);
- if (result < 0) {
- dev_err(dev, "bus-specific setup failed: %d\n",
- result);
- goto error_bus_setup;
- }
- }
- mutex_lock(&i2400m->init_mutex);
- if (i2400m->updown) {
- result = __i2400m_dev_start(
- i2400m, I2400M_BRI_SOFT | I2400M_BRI_MAC_REINIT);
- if (result < 0)
- goto error_dev_start;
- }
- mutex_unlock(&i2400m->init_mutex);
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-
-error_dev_start:
- if (i2400m->bus_release)
- i2400m->bus_release(i2400m);
- /* even if the device was up, it could not be recovered, so we
- * mark it as down. */
- i2400m->updown = 0;
- wmb(); /* see i2400m->updown's documentation */
- mutex_unlock(&i2400m->init_mutex);
-error_bus_setup:
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_post_reset);
-
-
-/*
- * The device has rebooted; fix up the device and the driver
- *
- * Tear down the driver communication with the device, reload the
- * firmware and reinitialize the communication with the device.
- *
- * If someone calls a reset when the device's firmware is down, in
- * theory we won't see it because we are not listening. However, just
- * in case, leave the code to handle it.
- *
- * If there is a reset context, use it; this means someone is waiting
- * for us to tell him when the reset operation is complete and the
- * device is ready to rock again.
- *
- * NOTE: if we are in the process of bringing up or down the
- * communication with the device [running i2400m_dev_start() or
- * _stop()], don't do anything, let it fail and handle it.
- *
- * This function is ran always in a thread context
- *
- * This function gets passed, as payload to i2400m_work() a 'const
- * char *' ptr with a "reason" why the reset happened (for messages).
- */
-static
-void __i2400m_dev_reset_handle(struct work_struct *ws)
-{
- struct i2400m *i2400m = container_of(ws, struct i2400m, reset_ws);
- const char *reason = i2400m->reset_reason;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_reset_ctx *ctx = i2400m->reset_ctx;
- int result;
-
- d_fnstart(3, dev, "(ws %p i2400m %p reason %s)\n", ws, i2400m, reason);
-
- i2400m->boot_mode = 1;
- wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */
-
- result = 0;
- if (mutex_trylock(&i2400m->init_mutex) == 0) {
- /* We are still in i2400m_dev_start() [let it fail] or
- * i2400m_dev_stop() [we are shutting down anyway, so
- * ignore it] or we are resetting somewhere else. */
- dev_err(dev, "device rebooted somewhere else?\n");
- i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST);
- complete(&i2400m->msg_completion);
- goto out;
- }
-
- dev_err(dev, "%s: reinitializing driver\n", reason);
- rmb();
- if (i2400m->updown) {
- __i2400m_dev_stop(i2400m);
- i2400m->updown = 0;
- wmb(); /* see i2400m->updown's documentation */
- }
-
- if (i2400m->alive) {
- result = __i2400m_dev_start(i2400m,
- I2400M_BRI_SOFT | I2400M_BRI_MAC_REINIT);
- if (result < 0) {
- dev_err(dev, "%s: cannot start the device: %d\n",
- reason, result);
- result = -EUCLEAN;
- if (atomic_read(&i2400m->bus_reset_retries)
- >= I2400M_BUS_RESET_RETRIES) {
- result = -ENODEV;
- dev_err(dev, "tried too many times to "
- "reset the device, giving up\n");
- }
- }
- }
-
- if (i2400m->reset_ctx) {
- ctx->result = result;
- complete(&ctx->completion);
- }
- mutex_unlock(&i2400m->init_mutex);
- if (result == -EUCLEAN) {
- /*
- * We come here because the reset during operational mode
- * wasn't successfully done and need to proceed to a bus
- * reset. For the dev_reset_handle() to be able to handle
- * the reset event later properly, we restore boot_mode back
- * to the state before previous reset. ie: just like we are
- * issuing the bus reset for the first time
- */
- i2400m->boot_mode = 0;
- wmb();
-
- atomic_inc(&i2400m->bus_reset_retries);
- /* ops, need to clean up [w/ init_mutex not held] */
- result = i2400m_reset(i2400m, I2400M_RT_BUS);
- if (result >= 0)
- result = -ENODEV;
- } else {
- rmb();
- if (i2400m->alive) {
- /* great, we expect the device state up and
- * dev_start() actually brings the device state up */
- i2400m->updown = 1;
- wmb();
- atomic_set(&i2400m->bus_reset_retries, 0);
- }
- }
-out:
- d_fnend(3, dev, "(ws %p i2400m %p reason %s) = void\n",
- ws, i2400m, reason);
-}
-
-
-/*
- * i2400m_dev_reset_handle - Handle a device's reset in a thread context
- *
- * Schedule a device reset handling out on a thread context, so it
- * is safe to call from atomic context. We can't use the i2400m's
- * queue as we are going to destroy it and reinitialize it as part of
- * the driver bringup/bringup process.
- *
- * See __i2400m_dev_reset_handle() for details; that takes care of
- * reinitializing the driver to handle the reset, calling into the
- * bus-specific functions ops as needed.
- */
-int i2400m_dev_reset_handle(struct i2400m *i2400m, const char *reason)
-{
- i2400m->reset_reason = reason;
- return schedule_work(&i2400m->reset_ws);
-}
-EXPORT_SYMBOL_GPL(i2400m_dev_reset_handle);
-
-
-/*
- * The actual work of error recovery.
- *
- * The current implementation of error recovery is to trigger a bus reset.
- */
-static
-void __i2400m_error_recovery(struct work_struct *ws)
-{
- struct i2400m *i2400m = container_of(ws, struct i2400m, recovery_ws);
-
- i2400m_reset(i2400m, I2400M_RT_BUS);
-}
-
-/*
- * Schedule a work struct for error recovery.
- *
- * The intention of error recovery is to bring back the device to some
- * known state whenever TX sees -110 (-ETIMEOUT) on copying the data to
- * the device. The TX failure could mean a device bus stuck, so the current
- * error recovery implementation is to trigger a bus reset to the device
- * and hopefully it can bring back the device.
- *
- * The actual work of error recovery has to be in a thread context because
- * it is kicked off in the TX thread (i2400ms->tx_workqueue) which is to be
- * destroyed by the error recovery mechanism (currently a bus reset).
- *
- * Also, there may be already a queue of TX works that all hit
- * the -ETIMEOUT error condition because the device is stuck already.
- * Since bus reset is used as the error recovery mechanism and we don't
- * want consecutive bus resets simply because the multiple TX works
- * in the queue all hit the same device erratum, the flag "error_recovery"
- * is introduced for preventing unwanted consecutive bus resets.
- *
- * Error recovery shall only be invoked again if previous one was completed.
- * The flag error_recovery is set when error recovery mechanism is scheduled,
- * and is checked when we need to schedule another error recovery. If it is
- * in place already, then we shouldn't schedule another one.
- */
-void i2400m_error_recovery(struct i2400m *i2400m)
-{
- if (atomic_add_return(1, &i2400m->error_recovery) == 1)
- schedule_work(&i2400m->recovery_ws);
- else
- atomic_dec(&i2400m->error_recovery);
-}
-EXPORT_SYMBOL_GPL(i2400m_error_recovery);
-
-/*
- * Alloc the command and ack buffers for boot mode
- *
- * Get the buffers needed to deal with boot mode messages.
- */
-static
-int i2400m_bm_buf_alloc(struct i2400m *i2400m)
-{
- i2400m->bm_cmd_buf = kzalloc(I2400M_BM_CMD_BUF_SIZE, GFP_KERNEL);
- if (i2400m->bm_cmd_buf == NULL)
- goto error_bm_cmd_kzalloc;
- i2400m->bm_ack_buf = kzalloc(I2400M_BM_ACK_BUF_SIZE, GFP_KERNEL);
- if (i2400m->bm_ack_buf == NULL)
- goto error_bm_ack_buf_kzalloc;
- return 0;
-
-error_bm_ack_buf_kzalloc:
- kfree(i2400m->bm_cmd_buf);
-error_bm_cmd_kzalloc:
- return -ENOMEM;
-}
-
-
-/*
- * Free boot mode command and ack buffers.
- */
-static
-void i2400m_bm_buf_free(struct i2400m *i2400m)
-{
- kfree(i2400m->bm_ack_buf);
- kfree(i2400m->bm_cmd_buf);
-}
-
-
-/*
- * i2400m_init - Initialize a 'struct i2400m' from all zeroes
- *
- * This is a bus-generic API call.
- */
-void i2400m_init(struct i2400m *i2400m)
-{
- wimax_dev_init(&i2400m->wimax_dev);
-
- i2400m->boot_mode = 1;
- i2400m->rx_reorder = 1;
- init_waitqueue_head(&i2400m->state_wq);
-
- spin_lock_init(&i2400m->tx_lock);
- i2400m->tx_pl_min = UINT_MAX;
- i2400m->tx_size_min = UINT_MAX;
-
- spin_lock_init(&i2400m->rx_lock);
- i2400m->rx_pl_min = UINT_MAX;
- i2400m->rx_size_min = UINT_MAX;
- INIT_LIST_HEAD(&i2400m->rx_reports);
- INIT_WORK(&i2400m->rx_report_ws, i2400m_report_hook_work);
-
- mutex_init(&i2400m->msg_mutex);
- init_completion(&i2400m->msg_completion);
-
- mutex_init(&i2400m->init_mutex);
- /* wake_tx_ws is initialized in i2400m_tx_setup() */
-
- INIT_WORK(&i2400m->reset_ws, __i2400m_dev_reset_handle);
- INIT_WORK(&i2400m->recovery_ws, __i2400m_error_recovery);
-
- atomic_set(&i2400m->bus_reset_retries, 0);
-
- i2400m->alive = 0;
-
- /* initialize error_recovery to 1 for denoting we
- * are not yet ready to take any error recovery */
- atomic_set(&i2400m->error_recovery, 1);
-}
-EXPORT_SYMBOL_GPL(i2400m_init);
-
-
-int i2400m_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
-{
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
-
- /*
- * Make sure we stop TXs and down the carrier before
- * resetting; this is needed to avoid things like
- * i2400m_wake_tx() scheduling stuff in parallel.
- */
- if (net_dev->reg_state == NETREG_REGISTERED) {
- netif_tx_disable(net_dev);
- netif_carrier_off(net_dev);
- }
- return i2400m->bus_reset(i2400m, rt);
-}
-EXPORT_SYMBOL_GPL(i2400m_reset);
-
-
-/**
- * i2400m_setup - bus-generic setup function for the i2400m device
- *
- * @i2400m: device descriptor (bus-specific parts have been initialized)
- * @bm_flags: boot mode flags
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * Sets up basic device comunication infrastructure, boots the ROM to
- * read the MAC address, registers with the WiMAX and network stacks
- * and then brings up the device.
- */
-int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
-
- snprintf(wimax_dev->name, sizeof(wimax_dev->name),
- "i2400m-%s:%s", dev->bus->name, dev_name(dev));
-
- result = i2400m_bm_buf_alloc(i2400m);
- if (result < 0) {
- dev_err(dev, "cannot allocate bootmode scratch buffers\n");
- goto error_bm_buf_alloc;
- }
-
- if (i2400m->bus_setup) {
- result = i2400m->bus_setup(i2400m);
- if (result < 0) {
- dev_err(dev, "bus-specific setup failed: %d\n",
- result);
- goto error_bus_setup;
- }
- }
-
- result = i2400m_bootrom_init(i2400m, bm_flags);
- if (result < 0) {
- dev_err(dev, "read mac addr: bootrom init "
- "failed: %d\n", result);
- goto error_bootrom_init;
- }
- result = i2400m_read_mac_addr(i2400m);
- if (result < 0)
- goto error_read_mac_addr;
- eth_random_addr(i2400m->src_mac_addr);
-
- i2400m->pm_notifier.notifier_call = i2400m_pm_notifier;
- register_pm_notifier(&i2400m->pm_notifier);
-
- result = register_netdev(net_dev); /* Okey dokey, bring it up */
- if (result < 0) {
- dev_err(dev, "cannot register i2400m network device: %d\n",
- result);
- goto error_register_netdev;
- }
- netif_carrier_off(net_dev);
-
- i2400m->wimax_dev.op_msg_from_user = i2400m_op_msg_from_user;
- i2400m->wimax_dev.op_rfkill_sw_toggle = i2400m_op_rfkill_sw_toggle;
- i2400m->wimax_dev.op_reset = i2400m_op_reset;
-
- result = wimax_dev_add(&i2400m->wimax_dev, net_dev);
- if (result < 0)
- goto error_wimax_dev_add;
-
- /* Now setup all that requires a registered net and wimax device. */
- result = sysfs_create_group(&net_dev->dev.kobj, &i2400m_dev_attr_group);
- if (result < 0) {
- dev_err(dev, "cannot setup i2400m's sysfs: %d\n", result);
- goto error_sysfs_setup;
- }
-
- i2400m_debugfs_add(i2400m);
-
- result = i2400m_dev_start(i2400m, bm_flags);
- if (result < 0)
- goto error_dev_start;
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-
-error_dev_start:
- i2400m_debugfs_rm(i2400m);
- sysfs_remove_group(&i2400m->wimax_dev.net_dev->dev.kobj,
- &i2400m_dev_attr_group);
-error_sysfs_setup:
- wimax_dev_rm(&i2400m->wimax_dev);
-error_wimax_dev_add:
- unregister_netdev(net_dev);
-error_register_netdev:
- unregister_pm_notifier(&i2400m->pm_notifier);
-error_read_mac_addr:
-error_bootrom_init:
- if (i2400m->bus_release)
- i2400m->bus_release(i2400m);
-error_bus_setup:
- i2400m_bm_buf_free(i2400m);
-error_bm_buf_alloc:
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_setup);
-
-
-/*
- * i2400m_release - release the bus-generic driver resources
- *
- * Sends a disconnect message and undoes any setup done by i2400m_setup()
- */
-void i2400m_release(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- netif_stop_queue(i2400m->wimax_dev.net_dev);
-
- i2400m_dev_stop(i2400m);
-
- cancel_work_sync(&i2400m->reset_ws);
- cancel_work_sync(&i2400m->recovery_ws);
-
- i2400m_debugfs_rm(i2400m);
- sysfs_remove_group(&i2400m->wimax_dev.net_dev->dev.kobj,
- &i2400m_dev_attr_group);
- wimax_dev_rm(&i2400m->wimax_dev);
- unregister_netdev(i2400m->wimax_dev.net_dev);
- unregister_pm_notifier(&i2400m->pm_notifier);
- if (i2400m->bus_release)
- i2400m->bus_release(i2400m);
- i2400m_bm_buf_free(i2400m);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-EXPORT_SYMBOL_GPL(i2400m_release);
-
-
-/*
- * Debug levels control; see debug.h
- */
-struct d_level D_LEVEL[] = {
- D_SUBMODULE_DEFINE(control),
- D_SUBMODULE_DEFINE(driver),
- D_SUBMODULE_DEFINE(debugfs),
- D_SUBMODULE_DEFINE(fw),
- D_SUBMODULE_DEFINE(netdev),
- D_SUBMODULE_DEFINE(rfkill),
- D_SUBMODULE_DEFINE(rx),
- D_SUBMODULE_DEFINE(sysfs),
- D_SUBMODULE_DEFINE(tx),
-};
-size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
-
-
-static
-int __init i2400m_driver_init(void)
-{
- d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400m_debug_params,
- "i2400m.debug");
- return i2400m_barker_db_init(i2400m_barkers_params);
-}
-module_init(i2400m_driver_init);
-
-static
-void __exit i2400m_driver_exit(void)
-{
- i2400m_barker_db_exit();
-}
-module_exit(i2400m_driver_exit);
-
-MODULE_AUTHOR("Intel Corporation <linux-wimax@...el.com>");
-MODULE_DESCRIPTION("Intel 2400M WiMAX networking bus-generic driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/wimax/i2400m/fw.c b/drivers/staging/wimax/i2400m/fw.c
deleted file mode 100644
index 75df0716f388..000000000000
--- a/drivers/staging/wimax/i2400m/fw.c
+++ /dev/null
@@ -1,1666 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Firmware uploader
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- *
- * THE PROCEDURE
- *
- * The 2400m and derived devices work in two modes: boot-mode or
- * normal mode. In boot mode we can execute only a handful of commands
- * targeted at uploading the firmware and launching it.
- *
- * The 2400m enters boot mode when it is first connected to the
- * system, when it crashes and when you ask it to reboot. There are
- * two submodes of the boot mode: signed and non-signed. Signed takes
- * firmwares signed with a certain private key, non-signed takes any
- * firmware. Normal hardware takes only signed firmware.
- *
- * On boot mode, in USB, we write to the device using the bulk out
- * endpoint and read from it in the notification endpoint.
- *
- * Upon entrance to boot mode, the device sends (preceded with a few
- * zero length packets (ZLPs) on the notification endpoint in USB) a
- * reboot barker (4 le32 words with the same value). We ack it by
- * sending the same barker to the device. The device acks with a
- * reboot ack barker (4 le32 words with value I2400M_ACK_BARKER) and
- * then is fully booted. At this point we can upload the firmware.
- *
- * Note that different iterations of the device and EEPROM
- * configurations will send different [re]boot barkers; these are
- * collected in i2400m_barker_db along with the firmware
- * characteristics they require.
- *
- * This process is accomplished by the i2400m_bootrom_init()
- * function. All the device interaction happens through the
- * i2400m_bm_cmd() [boot mode command]. Special return values will
- * indicate if the device did reset during the process.
- *
- * After this, we read the MAC address and then (if needed)
- * reinitialize the device. We need to read it ahead of time because
- * in the future, we might not upload the firmware until userspace
- * 'ifconfig up's the device.
- *
- * We can then upload the firmware file. The file is composed of a BCF
- * header (basic data, keys and signatures) and a list of write
- * commands and payloads. Optionally more BCF headers might follow the
- * main payload. We first upload the header [i2400m_dnload_init()] and
- * then pass the commands and payloads verbatim to the i2400m_bm_cmd()
- * function [i2400m_dnload_bcf()]. Then we tell the device to jump to
- * the new firmware [i2400m_dnload_finalize()].
- *
- * Once firmware is uploaded, we are good to go :)
- *
- * When we don't know in which mode we are, we first try by sending a
- * warm reset request that will take us to boot-mode. If we time out
- * waiting for a reboot barker, that means maybe we are already in
- * boot mode, so we send a reboot barker.
- *
- * COMMAND EXECUTION
- *
- * This code (and process) is single threaded; for executing commands,
- * we post a URB to the notification endpoint, post the command, wait
- * for data on the notification buffer. We don't need to worry about
- * others as we know we are the only ones in there.
- *
- * BACKEND IMPLEMENTATION
- *
- * This code is bus-generic; the bus-specific driver provides back end
- * implementations to send a boot mode command to the device and to
- * read an acknolwedgement from it (or an asynchronous notification)
- * from it.
- *
- * FIRMWARE LOADING
- *
- * Note that in some cases, we can't just load a firmware file (for
- * example, when resuming). For that, we might cache the firmware
- * file. Thus, when doing the bootstrap, if there is a cache firmware
- * file, it is used; if not, loading from disk is attempted.
- *
- * ROADMAP
- *
- * i2400m_barker_db_init Called by i2400m_driver_init()
- * i2400m_barker_db_add
- *
- * i2400m_barker_db_exit Called by i2400m_driver_exit()
- *
- * i2400m_dev_bootstrap Called by __i2400m_dev_start()
- * request_firmware
- * i2400m_fw_bootstrap
- * i2400m_fw_check
- * i2400m_fw_hdr_check
- * i2400m_fw_dnload
- * release_firmware
- *
- * i2400m_fw_dnload
- * i2400m_bootrom_init
- * i2400m_bm_cmd
- * i2400m_reset
- * i2400m_dnload_init
- * i2400m_dnload_init_signed
- * i2400m_dnload_init_nonsigned
- * i2400m_download_chunk
- * i2400m_bm_cmd
- * i2400m_dnload_bcf
- * i2400m_bm_cmd
- * i2400m_dnload_finalize
- * i2400m_bm_cmd
- *
- * i2400m_bm_cmd
- * i2400m->bus_bm_cmd_send()
- * i2400m->bus_bm_wait_for_ack
- * __i2400m_bm_ack_verify
- * i2400m_is_boot_barker
- *
- * i2400m_bm_cmd_prepare Used by bus-drivers to prep
- * commands before sending
- *
- * i2400m_pm_notifier Called on Power Management events
- * i2400m_fw_cache
- * i2400m_fw_uncache
- */
-#include <linux/firmware.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/export.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE fw
-#include "debug-levels.h"
-
-
-static const __le32 i2400m_ACK_BARKER[4] = {
- cpu_to_le32(I2400M_ACK_BARKER),
- cpu_to_le32(I2400M_ACK_BARKER),
- cpu_to_le32(I2400M_ACK_BARKER),
- cpu_to_le32(I2400M_ACK_BARKER)
-};
-
-
-/**
- * Prepare a boot-mode command for delivery
- *
- * @cmd: pointer to bootrom header to prepare
- *
- * Computes checksum if so needed. After calling this function, DO NOT
- * modify the command or header as the checksum won't work anymore.
- *
- * We do it from here because some times we cannot do it in the
- * original context the command was sent (it is a const), so when we
- * copy it to our staging buffer, we add the checksum there.
- */
-void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *cmd)
-{
- if (i2400m_brh_get_use_checksum(cmd)) {
- int i;
- __le32 checksum = 0;
- const u32 *checksum_ptr = (void *) cmd->payload;
-
- for (i = 0; i < le32_to_cpu(cmd->data_size) / 4; i++)
- le32_add_cpu(&checksum, *checksum_ptr++);
-
- le32_add_cpu(&checksum, le32_to_cpu(cmd->command));
- le32_add_cpu(&checksum, le32_to_cpu(cmd->target_addr));
- le32_add_cpu(&checksum, le32_to_cpu(cmd->data_size));
-
- cmd->block_checksum = checksum;
- }
-}
-EXPORT_SYMBOL_GPL(i2400m_bm_cmd_prepare);
-
-
-/*
- * Database of known barkers.
- *
- * A barker is what the device sends indicating he is ready to be
- * bootloaded. Different versions of the device will send different
- * barkers. Depending on the barker, it might mean the device wants
- * some kind of firmware or the other.
- */
-static struct i2400m_barker_db {
- __le32 data[4];
-} *i2400m_barker_db;
-static size_t i2400m_barker_db_used, i2400m_barker_db_size;
-
-
-static
-int i2400m_zrealloc_2x(void **ptr, size_t *_count, size_t el_size,
- gfp_t gfp_flags)
-{
- size_t old_count = *_count,
- new_count = old_count ? 2 * old_count : 2,
- old_size = el_size * old_count,
- new_size = el_size * new_count;
- void *nptr = krealloc(*ptr, new_size, gfp_flags);
- if (nptr) {
- /* zero the other half or the whole thing if old_count
- * was zero */
- if (old_size == 0)
- memset(nptr, 0, new_size);
- else
- memset(nptr + old_size, 0, old_size);
- *_count = new_count;
- *ptr = nptr;
- return 0;
- } else
- return -ENOMEM;
-}
-
-
-/*
- * Add a barker to the database
- *
- * This cannot used outside of this module and only at at module_init
- * time. This is to avoid the need to do locking.
- */
-static
-int i2400m_barker_db_add(u32 barker_id)
-{
- int result;
-
- struct i2400m_barker_db *barker;
- if (i2400m_barker_db_used >= i2400m_barker_db_size) {
- result = i2400m_zrealloc_2x(
- (void **) &i2400m_barker_db, &i2400m_barker_db_size,
- sizeof(i2400m_barker_db[0]), GFP_KERNEL);
- if (result < 0)
- return result;
- }
- barker = i2400m_barker_db + i2400m_barker_db_used++;
- barker->data[0] = cpu_to_le32(barker_id);
- barker->data[1] = cpu_to_le32(barker_id);
- barker->data[2] = cpu_to_le32(barker_id);
- barker->data[3] = cpu_to_le32(barker_id);
- return 0;
-}
-
-
-void i2400m_barker_db_exit(void)
-{
- kfree(i2400m_barker_db);
- i2400m_barker_db = NULL;
- i2400m_barker_db_size = 0;
- i2400m_barker_db_used = 0;
-}
-
-
-/*
- * Helper function to add all the known stable barkers to the barker
- * database.
- */
-static
-int i2400m_barker_db_known_barkers(void)
-{
- int result;
-
- result = i2400m_barker_db_add(I2400M_NBOOT_BARKER);
- if (result < 0)
- goto error_add;
- result = i2400m_barker_db_add(I2400M_SBOOT_BARKER);
- if (result < 0)
- goto error_add;
- result = i2400m_barker_db_add(I2400M_SBOOT_BARKER_6050);
- if (result < 0)
- goto error_add;
-error_add:
- return result;
-}
-
-
-/*
- * Initialize the barker database
- *
- * This can only be used from the module_init function for this
- * module; this is to avoid the need to do locking.
- *
- * @options: command line argument with extra barkers to
- * recognize. This is a comma-separated list of 32-bit hex
- * numbers. They are appended to the existing list. Setting 0
- * cleans the existing list and starts a new one.
- */
-int i2400m_barker_db_init(const char *_options)
-{
- int result;
- char *options = NULL, *options_orig, *token;
-
- i2400m_barker_db = NULL;
- i2400m_barker_db_size = 0;
- i2400m_barker_db_used = 0;
-
- result = i2400m_barker_db_known_barkers();
- if (result < 0)
- goto error_add;
- /* parse command line options from i2400m.barkers */
- if (_options != NULL) {
- unsigned barker;
-
- options_orig = kstrdup(_options, GFP_KERNEL);
- if (options_orig == NULL) {
- result = -ENOMEM;
- goto error_parse;
- }
- options = options_orig;
-
- while ((token = strsep(&options, ",")) != NULL) {
- if (*token == '\0') /* eat joint commas */
- continue;
- if (sscanf(token, "%x", &barker) != 1
- || barker > 0xffffffff) {
- printk(KERN_ERR "%s: can't recognize "
- "i2400m.barkers value '%s' as "
- "a 32-bit number\n",
- __func__, token);
- result = -EINVAL;
- goto error_parse;
- }
- if (barker == 0) {
- /* clean list and start new */
- i2400m_barker_db_exit();
- continue;
- }
- result = i2400m_barker_db_add(barker);
- if (result < 0)
- goto error_parse_add;
- }
- kfree(options_orig);
- }
- return 0;
-
-error_parse_add:
-error_parse:
- kfree(options_orig);
-error_add:
- kfree(i2400m_barker_db);
- return result;
-}
-
-
-/*
- * Recognize a boot barker
- *
- * @buf: buffer where the boot barker.
- * @buf_size: size of the buffer (has to be 16 bytes). It is passed
- * here so the function can check it for the caller.
- *
- * Note that as a side effect, upon identifying the obtained boot
- * barker, this function will set i2400m->barker to point to the right
- * barker database entry. Subsequent calls to the function will result
- * in verifying that the same type of boot barker is returned when the
- * device [re]boots (as long as the same device instance is used).
- *
- * Return: 0 if @buf matches a known boot barker. -ENOENT if the
- * buffer in @buf doesn't match any boot barker in the database or
- * -EILSEQ if the buffer doesn't have the right size.
- */
-int i2400m_is_boot_barker(struct i2400m *i2400m,
- const void *buf, size_t buf_size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_barker_db *barker;
- int i;
-
- result = -ENOENT;
- if (buf_size != sizeof(i2400m_barker_db[i].data))
- return result;
-
- /* Short circuit if we have already discovered the barker
- * associated with the device. */
- if (i2400m->barker &&
- !memcmp(buf, i2400m->barker, sizeof(i2400m->barker->data)))
- return 0;
-
- for (i = 0; i < i2400m_barker_db_used; i++) {
- barker = &i2400m_barker_db[i];
- BUILD_BUG_ON(sizeof(barker->data) != 16);
- if (memcmp(buf, barker->data, sizeof(barker->data)))
- continue;
-
- if (i2400m->barker == NULL) {
- i2400m->barker = barker;
- d_printf(1, dev, "boot barker set to #%u/%08x\n",
- i, le32_to_cpu(barker->data[0]));
- if (barker->data[0] == le32_to_cpu(I2400M_NBOOT_BARKER))
- i2400m->sboot = 0;
- else
- i2400m->sboot = 1;
- } else if (i2400m->barker != barker) {
- dev_err(dev, "HW inconsistency: device "
- "reports a different boot barker "
- "than set (from %08x to %08x)\n",
- le32_to_cpu(i2400m->barker->data[0]),
- le32_to_cpu(barker->data[0]));
- result = -EIO;
- } else
- d_printf(2, dev, "boot barker confirmed #%u/%08x\n",
- i, le32_to_cpu(barker->data[0]));
- result = 0;
- break;
- }
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_is_boot_barker);
-
-
-/*
- * Verify the ack data received
- *
- * Given a reply to a boot mode command, chew it and verify everything
- * is ok.
- *
- * @opcode: opcode which generated this ack. For error messages.
- * @ack: pointer to ack data we received
- * @ack_size: size of that data buffer
- * @flags: I2400M_BM_CMD_* flags we called the command with.
- *
- * Way too long function -- maybe it should be further split
- */
-static
-ssize_t __i2400m_bm_ack_verify(struct i2400m *i2400m, int opcode,
- struct i2400m_bootrom_header *ack,
- size_t ack_size, int flags)
-{
- ssize_t result = -ENOMEM;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(8, dev, "(i2400m %p opcode %d ack %p size %zu)\n",
- i2400m, opcode, ack, ack_size);
- if (ack_size < sizeof(*ack)) {
- result = -EIO;
- dev_err(dev, "boot-mode cmd %d: HW BUG? notification didn't "
- "return enough data (%zu bytes vs %zu expected)\n",
- opcode, ack_size, sizeof(*ack));
- goto error_ack_short;
- }
- result = i2400m_is_boot_barker(i2400m, ack, ack_size);
- if (result >= 0) {
- result = -ERESTARTSYS;
- d_printf(6, dev, "boot-mode cmd %d: HW boot barker\n", opcode);
- goto error_reboot;
- }
- if (ack_size == sizeof(i2400m_ACK_BARKER)
- && memcmp(ack, i2400m_ACK_BARKER, sizeof(*ack)) == 0) {
- result = -EISCONN;
- d_printf(3, dev, "boot-mode cmd %d: HW reboot ack barker\n",
- opcode);
- goto error_reboot_ack;
- }
- result = 0;
- if (flags & I2400M_BM_CMD_RAW)
- goto out_raw;
- ack->data_size = le32_to_cpu(ack->data_size);
- ack->target_addr = le32_to_cpu(ack->target_addr);
- ack->block_checksum = le32_to_cpu(ack->block_checksum);
- d_printf(5, dev, "boot-mode cmd %d: notification for opcode %u "
- "response %u csum %u rr %u da %u\n",
- opcode, i2400m_brh_get_opcode(ack),
- i2400m_brh_get_response(ack),
- i2400m_brh_get_use_checksum(ack),
- i2400m_brh_get_response_required(ack),
- i2400m_brh_get_direct_access(ack));
- result = -EIO;
- if (i2400m_brh_get_signature(ack) != 0xcbbc) {
- dev_err(dev, "boot-mode cmd %d: HW BUG? wrong signature "
- "0x%04x\n", opcode, i2400m_brh_get_signature(ack));
- goto error_ack_signature;
- }
- if (opcode != -1 && opcode != i2400m_brh_get_opcode(ack)) {
- dev_err(dev, "boot-mode cmd %d: HW BUG? "
- "received response for opcode %u, expected %u\n",
- opcode, i2400m_brh_get_opcode(ack), opcode);
- goto error_ack_opcode;
- }
- if (i2400m_brh_get_response(ack) != 0) { /* failed? */
- dev_err(dev, "boot-mode cmd %d: error; hw response %u\n",
- opcode, i2400m_brh_get_response(ack));
- goto error_ack_failed;
- }
- if (ack_size < le32_to_cpu(ack->data_size) + sizeof(*ack)) {
- dev_err(dev, "boot-mode cmd %d: SW BUG "
- "driver provided only %zu bytes for %zu bytes "
- "of data\n", opcode, ack_size,
- (size_t) le32_to_cpu(ack->data_size) + sizeof(*ack));
- goto error_ack_short_buffer;
- }
- result = ack_size;
- /* Don't you love this stack of empty targets? Well, I don't
- * either, but it helps track exactly who comes in here and
- * why :) */
-error_ack_short_buffer:
-error_ack_failed:
-error_ack_opcode:
-error_ack_signature:
-out_raw:
-error_reboot_ack:
-error_reboot:
-error_ack_short:
- d_fnend(8, dev, "(i2400m %p opcode %d ack %p size %zu) = %d\n",
- i2400m, opcode, ack, ack_size, (int) result);
- return result;
-}
-
-
-/**
- * i2400m_bm_cmd - Execute a boot mode command
- *
- * @i2400m: device descriptor
- * @cmd: buffer containing the command data (pointing at the header).
- * This data can be ANYWHERE (for USB, we will copy it to an
- * specific buffer). Make sure everything is in proper little
- * endian.
- *
- * A raw buffer can be also sent, just cast it and set flags to
- * I2400M_BM_CMD_RAW.
- *
- * This function will generate a checksum for you if the
- * checksum bit in the command is set (unless I2400M_BM_CMD_RAW
- * is set).
- *
- * You can use the i2400m->bm_cmd_buf to stage your commands and
- * send them.
- *
- * If NULL, no command is sent (we just wait for an ack).
- *
- * @cmd_size: size of the command. Will be auto padded to the
- * bus-specific drivers padding requirements.
- *
- * @ack: buffer where to place the acknowledgement. If it is a regular
- * command response, all fields will be returned with the right,
- * native endianess.
- *
- * You *cannot* use i2400m->bm_ack_buf for this buffer.
- *
- * @ack_size: size of @ack, 16 aligned; you need to provide at least
- * sizeof(*ack) bytes and then enough to contain the return data
- * from the command
- *
- * @flags: see I2400M_BM_CMD_* above.
- *
- * Returns: bytes received by the notification; if < 0, an errno code
- * denoting an error or:
- *
- * -ERESTARTSYS The device has rebooted
- *
- * Executes a boot-mode command and waits for a response, doing basic
- * validation on it; if a zero length response is received, it retries
- * waiting for a response until a non-zero one is received (timing out
- * after %I2400M_BOOT_RETRIES retries).
- */
-static
-ssize_t i2400m_bm_cmd(struct i2400m *i2400m,
- const struct i2400m_bootrom_header *cmd, size_t cmd_size,
- struct i2400m_bootrom_header *ack, size_t ack_size,
- int flags)
-{
- ssize_t result, rx_bytes;
- struct device *dev = i2400m_dev(i2400m);
- int opcode = cmd == NULL ? -1 : i2400m_brh_get_opcode(cmd);
-
- d_fnstart(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu)\n",
- i2400m, cmd, cmd_size, ack, ack_size);
- BUG_ON(ack_size < sizeof(*ack));
- BUG_ON(i2400m->boot_mode == 0);
-
- if (cmd != NULL) { /* send the command */
- result = i2400m->bus_bm_cmd_send(i2400m, cmd, cmd_size, flags);
- if (result < 0)
- goto error_cmd_send;
- if ((flags & I2400M_BM_CMD_RAW) == 0)
- d_printf(5, dev,
- "boot-mode cmd %d csum %u rr %u da %u: "
- "addr 0x%04x size %u block csum 0x%04x\n",
- opcode, i2400m_brh_get_use_checksum(cmd),
- i2400m_brh_get_response_required(cmd),
- i2400m_brh_get_direct_access(cmd),
- cmd->target_addr, cmd->data_size,
- cmd->block_checksum);
- }
- result = i2400m->bus_bm_wait_for_ack(i2400m, ack, ack_size);
- if (result < 0) {
- dev_err(dev, "boot-mode cmd %d: error waiting for an ack: %d\n",
- opcode, (int) result); /* bah, %zd doesn't work */
- goto error_wait_for_ack;
- }
- rx_bytes = result;
- /* verify the ack and read more if necessary [result is the
- * final amount of bytes we get in the ack] */
- result = __i2400m_bm_ack_verify(i2400m, opcode, ack, ack_size, flags);
- if (result < 0)
- goto error_bad_ack;
- /* Don't you love this stack of empty targets? Well, I don't
- * either, but it helps track exactly who comes in here and
- * why :) */
- result = rx_bytes;
-error_bad_ack:
-error_wait_for_ack:
-error_cmd_send:
- d_fnend(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu) = %d\n",
- i2400m, cmd, cmd_size, ack, ack_size, (int) result);
- return result;
-}
-
-
-/**
- * i2400m_download_chunk - write a single chunk of data to the device's memory
- *
- * @i2400m: device descriptor
- * @chunk: the buffer to write
- * @__chunk_len: length of the buffer to write
- * @addr: address in the device memory space
- * @direct: bootrom write mode
- * @do_csum: should a checksum validation be performed
- */
-static int i2400m_download_chunk(struct i2400m *i2400m, const void *chunk,
- size_t __chunk_len, unsigned long addr,
- unsigned int direct, unsigned int do_csum)
-{
- int ret;
- size_t chunk_len = ALIGN(__chunk_len, I2400M_PL_ALIGN);
- struct device *dev = i2400m_dev(i2400m);
- struct {
- struct i2400m_bootrom_header cmd;
- u8 cmd_payload[];
- } __packed *buf;
- struct i2400m_bootrom_header ack;
-
- d_fnstart(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx "
- "direct %u do_csum %u)\n", i2400m, chunk, __chunk_len,
- addr, direct, do_csum);
- buf = i2400m->bm_cmd_buf;
- memcpy(buf->cmd_payload, chunk, __chunk_len);
- memset(buf->cmd_payload + __chunk_len, 0xad, chunk_len - __chunk_len);
-
- buf->cmd.command = i2400m_brh_command(I2400M_BRH_WRITE,
- __chunk_len & 0x3 ? 0 : do_csum,
- __chunk_len & 0xf ? 0 : direct);
- buf->cmd.target_addr = cpu_to_le32(addr);
- buf->cmd.data_size = cpu_to_le32(__chunk_len);
- ret = i2400m_bm_cmd(i2400m, &buf->cmd, sizeof(buf->cmd) + chunk_len,
- &ack, sizeof(ack), 0);
- if (ret >= 0)
- ret = 0;
- d_fnend(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx "
- "direct %u do_csum %u) = %d\n", i2400m, chunk, __chunk_len,
- addr, direct, do_csum, ret);
- return ret;
-}
-
-
-/*
- * Download a BCF file's sections to the device
- *
- * @i2400m: device descriptor
- * @bcf: pointer to firmware data (first header followed by the
- * payloads). Assumed verified and consistent.
- * @bcf_len: length (in bytes) of the @bcf buffer.
- *
- * Returns: < 0 errno code on error or the offset to the jump instruction.
- *
- * Given a BCF file, downloads each section (a command and a payload)
- * to the device's address space. Actually, it just executes each
- * command i the BCF file.
- *
- * The section size has to be aligned to 4 bytes AND the padding has
- * to be taken from the firmware file, as the signature takes it into
- * account.
- */
-static
-ssize_t i2400m_dnload_bcf(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf, size_t bcf_len)
-{
- ssize_t ret;
- struct device *dev = i2400m_dev(i2400m);
- size_t offset, /* iterator offset */
- data_size, /* Size of the data payload */
- section_size, /* Size of the whole section (cmd + payload) */
- section = 1;
- const struct i2400m_bootrom_header *bh;
- struct i2400m_bootrom_header ack;
-
- d_fnstart(3, dev, "(i2400m %p bcf %p bcf_len %zu)\n",
- i2400m, bcf, bcf_len);
- /* Iterate over the command blocks in the BCF file that start
- * after the header */
- offset = le32_to_cpu(bcf->header_len) * sizeof(u32);
- while (1) { /* start sending the file */
- bh = (void *) bcf + offset;
- data_size = le32_to_cpu(bh->data_size);
- section_size = ALIGN(sizeof(*bh) + data_size, 4);
- d_printf(7, dev,
- "downloading section #%zu (@%zu %zu B) to 0x%08x\n",
- section, offset, sizeof(*bh) + data_size,
- le32_to_cpu(bh->target_addr));
- /*
- * We look for JUMP cmd from the bootmode header,
- * either I2400M_BRH_SIGNED_JUMP for secure boot
- * or I2400M_BRH_JUMP for unsecure boot, the last chunk
- * should be the bootmode header with JUMP cmd.
- */
- if (i2400m_brh_get_opcode(bh) == I2400M_BRH_SIGNED_JUMP ||
- i2400m_brh_get_opcode(bh) == I2400M_BRH_JUMP) {
- d_printf(5, dev, "jump found @%zu\n", offset);
- break;
- }
- if (offset + section_size > bcf_len) {
- dev_err(dev, "fw %s: bad section #%zu, "
- "end (@%zu) beyond EOF (@%zu)\n",
- i2400m->fw_name, section,
- offset + section_size, bcf_len);
- ret = -EINVAL;
- goto error_section_beyond_eof;
- }
- __i2400m_msleep(20);
- ret = i2400m_bm_cmd(i2400m, bh, section_size,
- &ack, sizeof(ack), I2400M_BM_CMD_RAW);
- if (ret < 0) {
- dev_err(dev, "fw %s: section #%zu (@%zu %zu B) "
- "failed %d\n", i2400m->fw_name, section,
- offset, sizeof(*bh) + data_size, (int) ret);
- goto error_send;
- }
- offset += section_size;
- section++;
- }
- ret = offset;
-error_section_beyond_eof:
-error_send:
- d_fnend(3, dev, "(i2400m %p bcf %p bcf_len %zu) = %d\n",
- i2400m, bcf, bcf_len, (int) ret);
- return ret;
-}
-
-
-/*
- * Indicate if the device emitted a reboot barker that indicates
- * "signed boot"
- */
-static
-unsigned i2400m_boot_is_signed(struct i2400m *i2400m)
-{
- return likely(i2400m->sboot);
-}
-
-
-/*
- * Do the final steps of uploading firmware
- *
- * @bcf_hdr: BCF header we are actually using
- * @bcf: pointer to the firmware image (which matches the first header
- * that is followed by the actual payloads).
- * @offset: [byte] offset into @bcf for the command we need to send.
- *
- * Depending on the boot mode (signed vs non-signed), different
- * actions need to be taken.
- */
-static
-int i2400m_dnload_finalize(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf_hdr,
- const struct i2400m_bcf_hdr *bcf, size_t offset)
-{
- int ret = 0;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_bootrom_header *cmd, ack;
- struct {
- struct i2400m_bootrom_header cmd;
- u8 cmd_pl[0];
- } __packed *cmd_buf;
- size_t signature_block_offset, signature_block_size;
-
- d_fnstart(3, dev, "offset %zu\n", offset);
- cmd = (void *) bcf + offset;
- if (i2400m_boot_is_signed(i2400m) == 0) {
- struct i2400m_bootrom_header jump_ack;
- d_printf(1, dev, "unsecure boot, jumping to 0x%08x\n",
- le32_to_cpu(cmd->target_addr));
- cmd_buf = i2400m->bm_cmd_buf;
- memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd));
- cmd = &cmd_buf->cmd;
- /* now cmd points to the actual bootrom_header in cmd_buf */
- i2400m_brh_set_opcode(cmd, I2400M_BRH_JUMP);
- cmd->data_size = 0;
- ret = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
- &jump_ack, sizeof(jump_ack), 0);
- } else {
- d_printf(1, dev, "secure boot, jumping to 0x%08x\n",
- le32_to_cpu(cmd->target_addr));
- cmd_buf = i2400m->bm_cmd_buf;
- memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd));
- signature_block_offset =
- sizeof(*bcf_hdr)
- + le32_to_cpu(bcf_hdr->key_size) * sizeof(u32)
- + le32_to_cpu(bcf_hdr->exponent_size) * sizeof(u32);
- signature_block_size =
- le32_to_cpu(bcf_hdr->modulus_size) * sizeof(u32);
- memcpy(cmd_buf->cmd_pl,
- (void *) bcf_hdr + signature_block_offset,
- signature_block_size);
- ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd,
- sizeof(cmd_buf->cmd) + signature_block_size,
- &ack, sizeof(ack), I2400M_BM_CMD_RAW);
- }
- d_fnend(3, dev, "returning %d\n", ret);
- return ret;
-}
-
-
-/**
- * i2400m_bootrom_init - Reboots a powered device into boot mode
- *
- * @i2400m: device descriptor
- * @flags:
- * I2400M_BRI_SOFT: a reboot barker has been seen
- * already, so don't wait for it.
- *
- * I2400M_BRI_NO_REBOOT: Don't send a reboot command, but wait
- * for a reboot barker notification. This is a one shot; if
- * the state machine needs to send a reboot command it will.
- *
- * Returns:
- *
- * < 0 errno code on error, 0 if ok.
- *
- * Description:
- *
- * Tries hard enough to put the device in boot-mode. There are two
- * main phases to this:
- *
- * a. (1) send a reboot command and (2) get a reboot barker
- *
- * b. (1) echo/ack the reboot sending the reboot barker back and (2)
- * getting an ack barker in return
- *
- * We want to skip (a) in some cases [soft]. The state machine is
- * horrible, but it is basically: on each phase, send what has to be
- * sent (if any), wait for the answer and act on the answer. We might
- * have to backtrack and retry, so we keep a max tries counter for
- * that.
- *
- * It sucks because we don't know ahead of time which is going to be
- * the reboot barker (the device might send different ones depending
- * on its EEPROM config) and once the device reboots and waits for the
- * echo/ack reboot barker being sent back, it doesn't understand
- * anything else. So we can be left at the point where we don't know
- * what to send to it -- cold reset and bus reset seem to have little
- * effect. So the function iterates (in this case) through all the
- * known barkers and tries them all until an ACK is
- * received. Otherwise, it gives up.
- *
- * If we get a timeout after sending a warm reset, we do it again.
- */
-int i2400m_bootrom_init(struct i2400m *i2400m, enum i2400m_bri flags)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_bootrom_header *cmd;
- struct i2400m_bootrom_header ack;
- int count = i2400m->bus_bm_retries;
- int ack_timeout_cnt = 1;
- unsigned i;
-
- BUILD_BUG_ON(sizeof(*cmd) != sizeof(i2400m_barker_db[0].data));
- BUILD_BUG_ON(sizeof(ack) != sizeof(i2400m_ACK_BARKER));
-
- d_fnstart(4, dev, "(i2400m %p flags 0x%08x)\n", i2400m, flags);
- result = -ENOMEM;
- cmd = i2400m->bm_cmd_buf;
- if (flags & I2400M_BRI_SOFT)
- goto do_reboot_ack;
-do_reboot:
- ack_timeout_cnt = 1;
- if (--count < 0)
- goto error_timeout;
- d_printf(4, dev, "device reboot: reboot command [%d # left]\n",
- count);
- if ((flags & I2400M_BRI_NO_REBOOT) == 0)
- i2400m_reset(i2400m, I2400M_RT_WARM);
- result = i2400m_bm_cmd(i2400m, NULL, 0, &ack, sizeof(ack),
- I2400M_BM_CMD_RAW);
- flags &= ~I2400M_BRI_NO_REBOOT;
- switch (result) {
- case -ERESTARTSYS:
- /*
- * at this point, i2400m_bm_cmd(), through
- * __i2400m_bm_ack_process(), has updated
- * i2400m->barker and we are good to go.
- */
- d_printf(4, dev, "device reboot: got reboot barker\n");
- break;
- case -EISCONN: /* we don't know how it got here...but we follow it */
- d_printf(4, dev, "device reboot: got ack barker - whatever\n");
- goto do_reboot;
- case -ETIMEDOUT:
- /*
- * Device has timed out, we might be in boot mode
- * already and expecting an ack; if we don't know what
- * the barker is, we just send them all. Cold reset
- * and bus reset don't work. Beats me.
- */
- if (i2400m->barker != NULL) {
- dev_err(dev, "device boot: reboot barker timed out, "
- "trying (set) %08x echo/ack\n",
- le32_to_cpu(i2400m->barker->data[0]));
- goto do_reboot_ack;
- }
- for (i = 0; i < i2400m_barker_db_used; i++) {
- struct i2400m_barker_db *barker = &i2400m_barker_db[i];
- memcpy(cmd, barker->data, sizeof(barker->data));
- result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
- &ack, sizeof(ack),
- I2400M_BM_CMD_RAW);
- if (result == -EISCONN) {
- dev_warn(dev, "device boot: got ack barker "
- "after sending echo/ack barker "
- "#%d/%08x; rebooting j.i.c.\n",
- i, le32_to_cpu(barker->data[0]));
- flags &= ~I2400M_BRI_NO_REBOOT;
- goto do_reboot;
- }
- }
- dev_err(dev, "device boot: tried all the echo/acks, could "
- "not get device to respond; giving up");
- result = -ESHUTDOWN;
- case -EPROTO:
- case -ESHUTDOWN: /* dev is gone */
- case -EINTR: /* user cancelled */
- goto error_dev_gone;
- default:
- dev_err(dev, "device reboot: error %d while waiting "
- "for reboot barker - rebooting\n", result);
- d_dump(1, dev, &ack, result);
- goto do_reboot;
- }
- /* At this point we ack back with 4 REBOOT barkers and expect
- * 4 ACK barkers. This is ugly, as we send a raw command --
- * hence the cast. _bm_cmd() will catch the reboot ack
- * notification and report it as -EISCONN. */
-do_reboot_ack:
- d_printf(4, dev, "device reboot ack: sending ack [%d # left]\n", count);
- memcpy(cmd, i2400m->barker->data, sizeof(i2400m->barker->data));
- result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
- &ack, sizeof(ack), I2400M_BM_CMD_RAW);
- switch (result) {
- case -ERESTARTSYS:
- d_printf(4, dev, "reboot ack: got reboot barker - retrying\n");
- if (--count < 0)
- goto error_timeout;
- goto do_reboot_ack;
- case -EISCONN:
- d_printf(4, dev, "reboot ack: got ack barker - good\n");
- break;
- case -ETIMEDOUT: /* no response, maybe it is the other type? */
- if (ack_timeout_cnt-- < 0) {
- d_printf(4, dev, "reboot ack timedout: retrying\n");
- goto do_reboot_ack;
- } else {
- dev_err(dev, "reboot ack timedout too long: "
- "trying reboot\n");
- goto do_reboot;
- }
- break;
- case -EPROTO:
- case -ESHUTDOWN: /* dev is gone */
- goto error_dev_gone;
- default:
- dev_err(dev, "device reboot ack: error %d while waiting for "
- "reboot ack barker - rebooting\n", result);
- goto do_reboot;
- }
- d_printf(2, dev, "device reboot ack: got ack barker - boot done\n");
- result = 0;
-exit_timeout:
-error_dev_gone:
- d_fnend(4, dev, "(i2400m %p flags 0x%08x) = %d\n",
- i2400m, flags, result);
- return result;
-
-error_timeout:
- dev_err(dev, "Timed out waiting for reboot ack\n");
- result = -ETIMEDOUT;
- goto exit_timeout;
-}
-
-
-/*
- * Read the MAC addr
- *
- * The position this function reads is fixed in device memory and
- * always available, even without firmware.
- *
- * Note we specify we want to read only six bytes, but provide space
- * for 16, as we always get it rounded up.
- */
-int i2400m_read_mac_addr(struct i2400m *i2400m)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct i2400m_bootrom_header *cmd;
- struct {
- struct i2400m_bootrom_header ack;
- u8 ack_pl[16];
- } __packed ack_buf;
-
- d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
- cmd = i2400m->bm_cmd_buf;
- cmd->command = i2400m_brh_command(I2400M_BRH_READ, 0, 1);
- cmd->target_addr = cpu_to_le32(0x00203fe8);
- cmd->data_size = cpu_to_le32(6);
- result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
- &ack_buf.ack, sizeof(ack_buf), 0);
- if (result < 0) {
- dev_err(dev, "BM: read mac addr failed: %d\n", result);
- goto error_read_mac;
- }
- d_printf(2, dev, "mac addr is %pM\n", ack_buf.ack_pl);
- if (i2400m->bus_bm_mac_addr_impaired == 1) {
- ack_buf.ack_pl[0] = 0x00;
- ack_buf.ack_pl[1] = 0x16;
- ack_buf.ack_pl[2] = 0xd3;
- get_random_bytes(&ack_buf.ack_pl[3], 3);
- dev_err(dev, "BM is MAC addr impaired, faking MAC addr to "
- "mac addr is %pM\n", ack_buf.ack_pl);
- result = 0;
- }
- net_dev->addr_len = ETH_ALEN;
- memcpy(net_dev->dev_addr, ack_buf.ack_pl, ETH_ALEN);
-error_read_mac:
- d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-}
-
-
-/*
- * Initialize a non signed boot
- *
- * This implies sending some magic values to the device's memory. Note
- * we convert the values to little endian in the same array
- * declaration.
- */
-static
-int i2400m_dnload_init_nonsigned(struct i2400m *i2400m)
-{
- unsigned i = 0;
- int ret = 0;
- struct device *dev = i2400m_dev(i2400m);
- d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
- if (i2400m->bus_bm_pokes_table) {
- while (i2400m->bus_bm_pokes_table[i].address) {
- ret = i2400m_download_chunk(
- i2400m,
- &i2400m->bus_bm_pokes_table[i].data,
- sizeof(i2400m->bus_bm_pokes_table[i].data),
- i2400m->bus_bm_pokes_table[i].address, 1, 1);
- if (ret < 0)
- break;
- i++;
- }
- }
- d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret);
- return ret;
-}
-
-
-/*
- * Initialize the signed boot process
- *
- * @i2400m: device descriptor
- *
- * @bcf_hdr: pointer to the firmware header; assumes it is fully in
- * memory (it has gone through basic validation).
- *
- * Returns: 0 if ok, < 0 errno code on error, -ERESTARTSYS if the hw
- * rebooted.
- *
- * This writes the firmware BCF header to the device using the
- * HASH_PAYLOAD_ONLY command.
- */
-static
-int i2400m_dnload_init_signed(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf_hdr)
-{
- int ret;
- struct device *dev = i2400m_dev(i2400m);
- struct {
- struct i2400m_bootrom_header cmd;
- struct i2400m_bcf_hdr cmd_pl;
- } __packed *cmd_buf;
- struct i2400m_bootrom_header ack;
-
- d_fnstart(5, dev, "(i2400m %p bcf_hdr %p)\n", i2400m, bcf_hdr);
- cmd_buf = i2400m->bm_cmd_buf;
- cmd_buf->cmd.command =
- i2400m_brh_command(I2400M_BRH_HASH_PAYLOAD_ONLY, 0, 0);
- cmd_buf->cmd.target_addr = 0;
- cmd_buf->cmd.data_size = cpu_to_le32(sizeof(cmd_buf->cmd_pl));
- memcpy(&cmd_buf->cmd_pl, bcf_hdr, sizeof(*bcf_hdr));
- ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd, sizeof(*cmd_buf),
- &ack, sizeof(ack), 0);
- if (ret >= 0)
- ret = 0;
- d_fnend(5, dev, "(i2400m %p bcf_hdr %p) = %d\n", i2400m, bcf_hdr, ret);
- return ret;
-}
-
-
-/*
- * Initialize the firmware download at the device size
- *
- * Multiplex to the one that matters based on the device's mode
- * (signed or non-signed).
- */
-static
-int i2400m_dnload_init(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf_hdr)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
-
- if (i2400m_boot_is_signed(i2400m)) {
- d_printf(1, dev, "signed boot\n");
- result = i2400m_dnload_init_signed(i2400m, bcf_hdr);
- if (result == -ERESTARTSYS)
- return result;
- if (result < 0)
- dev_err(dev, "firmware %s: signed boot download "
- "initialization failed: %d\n",
- i2400m->fw_name, result);
- } else {
- /* non-signed boot process without pokes */
- d_printf(1, dev, "non-signed boot\n");
- result = i2400m_dnload_init_nonsigned(i2400m);
- if (result == -ERESTARTSYS)
- return result;
- if (result < 0)
- dev_err(dev, "firmware %s: non-signed download "
- "initialization failed: %d\n",
- i2400m->fw_name, result);
- }
- return result;
-}
-
-
-/*
- * Run consistency tests on the firmware file and load up headers
- *
- * Check for the firmware being made for the i2400m device,
- * etc...These checks are mostly informative, as the device will make
- * them too; but the driver's response is more informative on what
- * went wrong.
- *
- * This will also look at all the headers present on the firmware
- * file, and update i2400m->fw_bcf_hdr to point to them.
- */
-static
-int i2400m_fw_hdr_check(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf_hdr,
- size_t index, size_t offset)
-{
- struct device *dev = i2400m_dev(i2400m);
-
- unsigned module_type, header_len, major_version, minor_version,
- module_id, module_vendor, date, size;
-
- module_type = le32_to_cpu(bcf_hdr->module_type);
- header_len = sizeof(u32) * le32_to_cpu(bcf_hdr->header_len);
- major_version = (le32_to_cpu(bcf_hdr->header_version) & 0xffff0000)
- >> 16;
- minor_version = le32_to_cpu(bcf_hdr->header_version) & 0x0000ffff;
- module_id = le32_to_cpu(bcf_hdr->module_id);
- module_vendor = le32_to_cpu(bcf_hdr->module_vendor);
- date = le32_to_cpu(bcf_hdr->date);
- size = sizeof(u32) * le32_to_cpu(bcf_hdr->size);
-
- d_printf(1, dev, "firmware %s #%zd@...zx: BCF header "
- "type:vendor:id 0x%x:%x:%x v%u.%u (%u/%u B) built %08x\n",
- i2400m->fw_name, index, offset,
- module_type, module_vendor, module_id,
- major_version, minor_version, header_len, size, date);
-
- /* Hard errors */
- if (major_version != 1) {
- dev_err(dev, "firmware %s #%zd@...zx: major header version "
- "v%u.%u not supported\n",
- i2400m->fw_name, index, offset,
- major_version, minor_version);
- return -EBADF;
- }
-
- if (module_type != 6) { /* built for the right hardware? */
- dev_err(dev, "firmware %s #%zd@...zx: unexpected module "
- "type 0x%x; aborting\n",
- i2400m->fw_name, index, offset,
- module_type);
- return -EBADF;
- }
-
- if (module_vendor != 0x8086) {
- dev_err(dev, "firmware %s #%zd@...zx: unexpected module "
- "vendor 0x%x; aborting\n",
- i2400m->fw_name, index, offset, module_vendor);
- return -EBADF;
- }
-
- if (date < 0x20080300)
- dev_warn(dev, "firmware %s #%zd@...zx: build date %08x "
- "too old; unsupported\n",
- i2400m->fw_name, index, offset, date);
- return 0;
-}
-
-
-/*
- * Run consistency tests on the firmware file and load up headers
- *
- * Check for the firmware being made for the i2400m device,
- * etc...These checks are mostly informative, as the device will make
- * them too; but the driver's response is more informative on what
- * went wrong.
- *
- * This will also look at all the headers present on the firmware
- * file, and update i2400m->fw_hdrs to point to them.
- */
-static
-int i2400m_fw_check(struct i2400m *i2400m, const void *bcf, size_t bcf_size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- size_t headers = 0;
- const struct i2400m_bcf_hdr *bcf_hdr;
- const void *itr, *next, *top;
- size_t slots = 0, used_slots = 0;
-
- for (itr = bcf, top = itr + bcf_size;
- itr < top;
- headers++, itr = next) {
- size_t leftover, offset, header_len, size;
-
- leftover = top - itr;
- offset = itr - bcf;
- if (leftover <= sizeof(*bcf_hdr)) {
- dev_err(dev, "firmware %s: %zu B left at @%zx, "
- "not enough for BCF header\n",
- i2400m->fw_name, leftover, offset);
- break;
- }
- bcf_hdr = itr;
- /* Only the first header is supposed to be followed by
- * payload */
- header_len = sizeof(u32) * le32_to_cpu(bcf_hdr->header_len);
- size = sizeof(u32) * le32_to_cpu(bcf_hdr->size);
- if (headers == 0)
- next = itr + size;
- else
- next = itr + header_len;
-
- result = i2400m_fw_hdr_check(i2400m, bcf_hdr, headers, offset);
- if (result < 0)
- continue;
- if (used_slots + 1 >= slots) {
- /* +1 -> we need to account for the one we'll
- * occupy and at least an extra one for
- * always being NULL */
- result = i2400m_zrealloc_2x(
- (void **) &i2400m->fw_hdrs, &slots,
- sizeof(i2400m->fw_hdrs[0]),
- GFP_KERNEL);
- if (result < 0)
- goto error_zrealloc;
- }
- i2400m->fw_hdrs[used_slots] = bcf_hdr;
- used_slots++;
- }
- if (headers == 0) {
- dev_err(dev, "firmware %s: no usable headers found\n",
- i2400m->fw_name);
- result = -EBADF;
- } else
- result = 0;
-error_zrealloc:
- return result;
-}
-
-
-/*
- * Match a barker to a BCF header module ID
- *
- * The device sends a barker which tells the firmware loader which
- * header in the BCF file has to be used. This does the matching.
- */
-static
-unsigned i2400m_bcf_hdr_match(struct i2400m *i2400m,
- const struct i2400m_bcf_hdr *bcf_hdr)
-{
- u32 barker = le32_to_cpu(i2400m->barker->data[0])
- & 0x7fffffff;
- u32 module_id = le32_to_cpu(bcf_hdr->module_id)
- & 0x7fffffff; /* high bit used for something else */
-
- /* special case for 5x50 */
- if (barker == I2400M_SBOOT_BARKER && module_id == 0)
- return 1;
- if (module_id == barker)
- return 1;
- return 0;
-}
-
-static
-const struct i2400m_bcf_hdr *i2400m_bcf_hdr_find(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_bcf_hdr **bcf_itr, *bcf_hdr;
- unsigned i = 0;
- u32 barker = le32_to_cpu(i2400m->barker->data[0]);
-
- d_printf(2, dev, "finding BCF header for barker %08x\n", barker);
- if (barker == I2400M_NBOOT_BARKER) {
- bcf_hdr = i2400m->fw_hdrs[0];
- d_printf(1, dev, "using BCF header #%u/%08x for non-signed "
- "barker\n", 0, le32_to_cpu(bcf_hdr->module_id));
- return bcf_hdr;
- }
- for (bcf_itr = i2400m->fw_hdrs; *bcf_itr != NULL; bcf_itr++, i++) {
- bcf_hdr = *bcf_itr;
- if (i2400m_bcf_hdr_match(i2400m, bcf_hdr)) {
- d_printf(1, dev, "hit on BCF hdr #%u/%08x\n",
- i, le32_to_cpu(bcf_hdr->module_id));
- return bcf_hdr;
- } else
- d_printf(1, dev, "miss on BCF hdr #%u/%08x\n",
- i, le32_to_cpu(bcf_hdr->module_id));
- }
- dev_err(dev, "cannot find a matching BCF header for barker %08x\n",
- barker);
- return NULL;
-}
-
-
-/*
- * Download the firmware to the device
- *
- * @i2400m: device descriptor
- * @bcf: pointer to loaded (and minimally verified for consistency)
- * firmware
- * @bcf_size: size of the @bcf buffer (header plus payloads)
- *
- * The process for doing this is described in this file's header.
- *
- * Note we only reinitialize boot-mode if the flags say so. Some hw
- * iterations need it, some don't. In any case, if we loop, we always
- * need to reinitialize the boot room, hence the flags modification.
- */
-static
-int i2400m_fw_dnload(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf,
- size_t fw_size, enum i2400m_bri flags)
-{
- int ret = 0;
- struct device *dev = i2400m_dev(i2400m);
- int count = i2400m->bus_bm_retries;
- const struct i2400m_bcf_hdr *bcf_hdr;
- size_t bcf_size;
-
- d_fnstart(5, dev, "(i2400m %p bcf %p fw size %zu)\n",
- i2400m, bcf, fw_size);
- i2400m->boot_mode = 1;
- wmb(); /* Make sure other readers see it */
-hw_reboot:
- if (count-- == 0) {
- ret = -ERESTARTSYS;
- dev_err(dev, "device rebooted too many times, aborting\n");
- goto error_too_many_reboots;
- }
- if (flags & I2400M_BRI_MAC_REINIT) {
- ret = i2400m_bootrom_init(i2400m, flags);
- if (ret < 0) {
- dev_err(dev, "bootrom init failed: %d\n", ret);
- goto error_bootrom_init;
- }
- }
- flags |= I2400M_BRI_MAC_REINIT;
-
- /*
- * Initialize the download, push the bytes to the device and
- * then jump to the new firmware. Note @ret is passed with the
- * offset of the jump instruction to _dnload_finalize()
- *
- * Note we need to use the BCF header in the firmware image
- * that matches the barker that the device sent when it
- * rebooted, so it has to be passed along.
- */
- ret = -EBADF;
- bcf_hdr = i2400m_bcf_hdr_find(i2400m);
- if (bcf_hdr == NULL)
- goto error_bcf_hdr_find;
-
- ret = i2400m_dnload_init(i2400m, bcf_hdr);
- if (ret == -ERESTARTSYS)
- goto error_dev_rebooted;
- if (ret < 0)
- goto error_dnload_init;
-
- /*
- * bcf_size refers to one header size plus the fw sections size
- * indicated by the header,ie. if there are other extended headers
- * at the tail, they are not counted
- */
- bcf_size = sizeof(u32) * le32_to_cpu(bcf_hdr->size);
- ret = i2400m_dnload_bcf(i2400m, bcf, bcf_size);
- if (ret == -ERESTARTSYS)
- goto error_dev_rebooted;
- if (ret < 0) {
- dev_err(dev, "fw %s: download failed: %d\n",
- i2400m->fw_name, ret);
- goto error_dnload_bcf;
- }
-
- ret = i2400m_dnload_finalize(i2400m, bcf_hdr, bcf, ret);
- if (ret == -ERESTARTSYS)
- goto error_dev_rebooted;
- if (ret < 0) {
- dev_err(dev, "fw %s: "
- "download finalization failed: %d\n",
- i2400m->fw_name, ret);
- goto error_dnload_finalize;
- }
-
- d_printf(2, dev, "fw %s successfully uploaded\n",
- i2400m->fw_name);
- i2400m->boot_mode = 0;
- wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */
-error_dnload_finalize:
-error_dnload_bcf:
-error_dnload_init:
-error_bcf_hdr_find:
-error_bootrom_init:
-error_too_many_reboots:
- d_fnend(5, dev, "(i2400m %p bcf %p size %zu) = %d\n",
- i2400m, bcf, fw_size, ret);
- return ret;
-
-error_dev_rebooted:
- dev_err(dev, "device rebooted, %d tries left\n", count);
- /* we got the notification already, no need to wait for it again */
- flags |= I2400M_BRI_SOFT;
- goto hw_reboot;
-}
-
-static
-int i2400m_fw_bootstrap(struct i2400m *i2400m, const struct firmware *fw,
- enum i2400m_bri flags)
-{
- int ret;
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_bcf_hdr *bcf; /* Firmware data */
-
- d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
- bcf = (void *) fw->data;
- ret = i2400m_fw_check(i2400m, bcf, fw->size);
- if (ret >= 0)
- ret = i2400m_fw_dnload(i2400m, bcf, fw->size, flags);
- if (ret < 0)
- dev_err(dev, "%s: cannot use: %d, skipping\n",
- i2400m->fw_name, ret);
- kfree(i2400m->fw_hdrs);
- i2400m->fw_hdrs = NULL;
- d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret);
- return ret;
-}
-
-
-/* Refcounted container for firmware data */
-struct i2400m_fw {
- struct kref kref;
- const struct firmware *fw;
-};
-
-
-static
-void i2400m_fw_destroy(struct kref *kref)
-{
- struct i2400m_fw *i2400m_fw =
- container_of(kref, struct i2400m_fw, kref);
- release_firmware(i2400m_fw->fw);
- kfree(i2400m_fw);
-}
-
-
-static
-struct i2400m_fw *i2400m_fw_get(struct i2400m_fw *i2400m_fw)
-{
- if (i2400m_fw != NULL && i2400m_fw != (void *) ~0)
- kref_get(&i2400m_fw->kref);
- return i2400m_fw;
-}
-
-
-static
-void i2400m_fw_put(struct i2400m_fw *i2400m_fw)
-{
- kref_put(&i2400m_fw->kref, i2400m_fw_destroy);
-}
-
-
-/**
- * i2400m_dev_bootstrap - Bring the device to a known state and upload firmware
- *
- * @i2400m: device descriptor
- * @flags:
- * I2400M_BRI_SOFT: a reboot barker has been seen
- * already, so don't wait for it.
- *
- * I2400M_BRI_NO_REBOOT: Don't send a reboot command, but wait
- * for a reboot barker notification. This is a one shot; if
- * the state machine needs to send a reboot command it will.
- *
- * Returns: >= 0 if ok, < 0 errno code on error.
- *
- * This sets up the firmware upload environment, loads the firmware
- * file from disk, verifies and then calls the firmware upload process
- * per se.
- *
- * Can be called either from probe, or after a warm reset. Can not be
- * called from within an interrupt. All the flow in this code is
- * single-threade; all I/Os are synchronous.
- */
-int i2400m_dev_bootstrap(struct i2400m *i2400m, enum i2400m_bri flags)
-{
- int ret, itr;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_fw *i2400m_fw;
- const struct firmware *fw;
- const char *fw_name;
-
- d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
-
- ret = -ENODEV;
- spin_lock(&i2400m->rx_lock);
- i2400m_fw = i2400m_fw_get(i2400m->fw_cached);
- spin_unlock(&i2400m->rx_lock);
- if (i2400m_fw == (void *) ~0) {
- dev_err(dev, "can't load firmware now!");
- goto out;
- } else if (i2400m_fw != NULL) {
- dev_info(dev, "firmware %s: loading from cache\n",
- i2400m->fw_name);
- ret = i2400m_fw_bootstrap(i2400m, i2400m_fw->fw, flags);
- i2400m_fw_put(i2400m_fw);
- goto out;
- }
-
- /* Load firmware files to memory. */
- for (itr = 0, ret = -ENOENT; ; itr++) {
- fw_name = i2400m->bus_fw_names[itr];
- if (fw_name == NULL) {
- dev_err(dev, "Could not find a usable firmware image\n");
- break;
- }
- d_printf(1, dev, "trying firmware %s (%d)\n", fw_name, itr);
- ret = request_firmware(&fw, fw_name, dev);
- if (ret < 0) {
- dev_err(dev, "fw %s: cannot load file: %d\n",
- fw_name, ret);
- continue;
- }
- i2400m->fw_name = fw_name;
- ret = i2400m_fw_bootstrap(i2400m, fw, flags);
- release_firmware(fw);
- if (ret >= 0) /* firmware loaded successfully */
- break;
- i2400m->fw_name = NULL;
- }
-out:
- d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret);
- return ret;
-}
-EXPORT_SYMBOL_GPL(i2400m_dev_bootstrap);
-
-
-void i2400m_fw_cache(struct i2400m *i2400m)
-{
- int result;
- struct i2400m_fw *i2400m_fw;
- struct device *dev = i2400m_dev(i2400m);
-
- /* if there is anything there, free it -- now, this'd be weird */
- spin_lock(&i2400m->rx_lock);
- i2400m_fw = i2400m->fw_cached;
- spin_unlock(&i2400m->rx_lock);
- if (i2400m_fw != NULL && i2400m_fw != (void *) ~0) {
- i2400m_fw_put(i2400m_fw);
- WARN(1, "%s:%u: still cached fw still present?\n",
- __func__, __LINE__);
- }
-
- if (i2400m->fw_name == NULL) {
- dev_err(dev, "firmware n/a: can't cache\n");
- i2400m_fw = (void *) ~0;
- goto out;
- }
-
- i2400m_fw = kzalloc(sizeof(*i2400m_fw), GFP_ATOMIC);
- if (i2400m_fw == NULL)
- goto out;
- kref_init(&i2400m_fw->kref);
- result = request_firmware(&i2400m_fw->fw, i2400m->fw_name, dev);
- if (result < 0) {
- dev_err(dev, "firmware %s: failed to cache: %d\n",
- i2400m->fw_name, result);
- kfree(i2400m_fw);
- i2400m_fw = (void *) ~0;
- } else
- dev_info(dev, "firmware %s: cached\n", i2400m->fw_name);
-out:
- spin_lock(&i2400m->rx_lock);
- i2400m->fw_cached = i2400m_fw;
- spin_unlock(&i2400m->rx_lock);
-}
-
-
-void i2400m_fw_uncache(struct i2400m *i2400m)
-{
- struct i2400m_fw *i2400m_fw;
-
- spin_lock(&i2400m->rx_lock);
- i2400m_fw = i2400m->fw_cached;
- i2400m->fw_cached = NULL;
- spin_unlock(&i2400m->rx_lock);
-
- if (i2400m_fw != NULL && i2400m_fw != (void *) ~0)
- i2400m_fw_put(i2400m_fw);
-}
-
diff --git a/drivers/staging/wimax/i2400m/i2400m-usb.h b/drivers/staging/wimax/i2400m/i2400m-usb.h
deleted file mode 100644
index eff4f464a23e..000000000000
--- a/drivers/staging/wimax/i2400m/i2400m-usb.h
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * USB-specific i2400m driver definitions
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- *
- *
- * This driver implements the bus-specific part of the i2400m for
- * USB. Check i2400m.h for a generic driver description.
- *
- * ARCHITECTURE
- *
- * This driver listens to notifications sent from the notification
- * endpoint (in usb-notif.c); when data is ready to read, the code in
- * there schedules a read from the device (usb-rx.c) and then passes
- * the data to the generic RX code (rx.c).
- *
- * When the generic driver needs to send data (network or control), it
- * queues up in the TX FIFO (tx.c) and that will notify the driver
- * through the i2400m->bus_tx_kick() callback
- * (usb-tx.c:i2400mu_bus_tx_kick) which will send the items in the
- * FIFO queue.
- *
- * This driver, as well, implements the USB-specific ops for the generic
- * driver to be able to setup/teardown communication with the device
- * [i2400m_bus_dev_start() and i2400m_bus_dev_stop()], reseting the
- * device [i2400m_bus_reset()] and performing firmware upload
- * [i2400m_bus_bm_cmd() and i2400_bus_bm_wait_for_ack()].
- */
-
-#ifndef __I2400M_USB_H__
-#define __I2400M_USB_H__
-
-#include "i2400m.h"
-#include <linux/kthread.h>
-
-
-/*
- * Error Density Count: cheapo error density (over time) counter
- *
- * Originally by Reinette Chatre <reinette.chatre@...el.com>
- *
- * Embed an 'struct edc' somewhere. Each time there is a soft or
- * retryable error, call edc_inc() and check if the error top
- * watermark has been reached.
- */
-enum {
- EDC_MAX_ERRORS = 10,
- EDC_ERROR_TIMEFRAME = HZ,
-};
-
-/* error density counter */
-struct edc {
- unsigned long timestart;
- u16 errorcount;
-};
-
-struct i2400m_endpoint_cfg {
- unsigned char bulk_out;
- unsigned char notification;
- unsigned char reset_cold;
- unsigned char bulk_in;
-};
-
-static inline void edc_init(struct edc *edc)
-{
- edc->timestart = jiffies;
-}
-
-/**
- * edc_inc - report a soft error and check if we are over the watermark
- *
- * @edc: pointer to error density counter.
- * @max_err: maximum number of errors we can accept over the timeframe
- * @timeframe: length of the timeframe (in jiffies).
- *
- * Returns: !0 1 if maximum acceptable errors per timeframe has been
- * exceeded. 0 otherwise.
- *
- * This is way to determine if the number of acceptable errors per time
- * period has been exceeded. It is not accurate as there are cases in which
- * this scheme will not work, for example if there are periodic occurrences
- * of errors that straddle updates to the start time. This scheme is
- * sufficient for our usage.
- *
- * To use, embed a 'struct edc' somewhere, initialize it with
- * edc_init() and when an error hits:
- *
- * if (do_something_fails_with_a_soft_error) {
- * if (edc_inc(&my->edc, MAX_ERRORS, MAX_TIMEFRAME))
- * Ops, hard error, do something about it
- * else
- * Retry or ignore, depending on whatever
- * }
- */
-static inline int edc_inc(struct edc *edc, u16 max_err, u16 timeframe)
-{
- unsigned long now;
-
- now = jiffies;
- if (time_after(now, edc->timestart + timeframe)) {
- edc->errorcount = 1;
- edc->timestart = now;
- } else if (++edc->errorcount > max_err) {
- edc->errorcount = 0;
- edc->timestart = now;
- return 1;
- }
- return 0;
-}
-
-/* Host-Device interface for USB */
-enum {
- I2400M_USB_BOOT_RETRIES = 3,
- I2400MU_MAX_NOTIFICATION_LEN = 256,
- I2400MU_BLK_SIZE = 16,
- I2400MU_PL_SIZE_MAX = 0x3EFF,
-
- /* Device IDs */
- USB_DEVICE_ID_I6050 = 0x0186,
- USB_DEVICE_ID_I6050_2 = 0x0188,
- USB_DEVICE_ID_I6150 = 0x07d6,
- USB_DEVICE_ID_I6150_2 = 0x07d7,
- USB_DEVICE_ID_I6150_3 = 0x07d9,
- USB_DEVICE_ID_I6250 = 0x0187,
-};
-
-
-/**
- * struct i2400mu - descriptor for a USB connected i2400m
- *
- * @i2400m: bus-generic i2400m implementation; has to be first (see
- * it's documentation in i2400m.h).
- *
- * @usb_dev: pointer to our USB device
- *
- * @usb_iface: pointer to our USB interface
- *
- * @urb_edc: error density counter; used to keep a density-on-time tab
- * on how many soft (retryable or ignorable) errors we get. If we
- * go over the threshold, we consider the bus transport is failing
- * too much and reset.
- *
- * @notif_urb: URB for receiving notifications from the device.
- *
- * @tx_kthread: thread we use for data TX. We use a thread because in
- * order to do deep power saving and put the device to sleep, we
- * need to call usb_autopm_*() [blocking functions].
- *
- * @tx_wq: waitqueue for the TX kthread to sleep when there is no data
- * to be sent; when more data is available, it is woken up by
- * i2400mu_bus_tx_kick().
- *
- * @rx_kthread: thread we use for data RX. We use a thread because in
- * order to do deep power saving and put the device to sleep, we
- * need to call usb_autopm_*() [blocking functions].
- *
- * @rx_wq: waitqueue for the RX kthread to sleep when there is no data
- * to receive. When data is available, it is woken up by
- * usb-notif.c:i2400mu_notification_grok().
- *
- * @rx_pending_count: number of rx-data-ready notifications that were
- * still not handled by the RX kthread.
- *
- * @rx_size: current RX buffer size that is being used.
- *
- * @rx_size_acc: accumulator of the sizes of the previous read
- * transactions.
- *
- * @rx_size_cnt: number of read transactions accumulated in
- * @rx_size_acc.
- *
- * @do_autopm: disable(0)/enable(>0) calling the
- * usb_autopm_get/put_interface() barriers when executing
- * commands. See doc in i2400mu_suspend() for more information.
- *
- * @rx_size_auto_shrink: if true, the rx_size is shrunk
- * automatically based on the average size of the received
- * transactions. This allows the receive code to allocate smaller
- * chunks of memory and thus reduce pressure on the memory
- * allocator by not wasting so much space. By default it is
- * enabled.
- *
- * @debugfs_dentry: hookup for debugfs files.
- * These have to be in a separate directory, a child of
- * (wimax_dev->debugfs_dentry) so they can be removed when the
- * module unloads, as we don't keep each dentry.
- */
-struct i2400mu {
- struct i2400m i2400m; /* FIRST! See doc */
-
- struct usb_device *usb_dev;
- struct usb_interface *usb_iface;
- struct edc urb_edc; /* Error density counter */
- struct i2400m_endpoint_cfg endpoint_cfg;
-
- struct urb *notif_urb;
- struct task_struct *tx_kthread;
- wait_queue_head_t tx_wq;
-
- struct task_struct *rx_kthread;
- wait_queue_head_t rx_wq;
- atomic_t rx_pending_count;
- size_t rx_size, rx_size_acc, rx_size_cnt;
- atomic_t do_autopm;
- u8 rx_size_auto_shrink;
-
- struct dentry *debugfs_dentry;
- unsigned i6050:1; /* 1 if this is a 6050 based SKU */
-};
-
-
-static inline
-void i2400mu_init(struct i2400mu *i2400mu)
-{
- i2400m_init(&i2400mu->i2400m);
- edc_init(&i2400mu->urb_edc);
- init_waitqueue_head(&i2400mu->tx_wq);
- atomic_set(&i2400mu->rx_pending_count, 0);
- init_waitqueue_head(&i2400mu->rx_wq);
- i2400mu->rx_size = PAGE_SIZE - sizeof(struct skb_shared_info);
- atomic_set(&i2400mu->do_autopm, 1);
- i2400mu->rx_size_auto_shrink = 1;
-}
-
-int i2400mu_notification_setup(struct i2400mu *);
-void i2400mu_notification_release(struct i2400mu *);
-
-int i2400mu_rx_setup(struct i2400mu *);
-void i2400mu_rx_release(struct i2400mu *);
-void i2400mu_rx_kick(struct i2400mu *);
-
-int i2400mu_tx_setup(struct i2400mu *);
-void i2400mu_tx_release(struct i2400mu *);
-void i2400mu_bus_tx_kick(struct i2400m *);
-
-ssize_t i2400mu_bus_bm_cmd_send(struct i2400m *,
- const struct i2400m_bootrom_header *, size_t,
- int);
-ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *,
- struct i2400m_bootrom_header *, size_t);
-#endif /* #ifndef __I2400M_USB_H__ */
diff --git a/drivers/staging/wimax/i2400m/i2400m.h b/drivers/staging/wimax/i2400m/i2400m.h
deleted file mode 100644
index de22cc6f2c5c..000000000000
--- a/drivers/staging/wimax/i2400m/i2400m.h
+++ /dev/null
@@ -1,970 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Declarations for bus-generic internal APIs
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- *
- *
- * GENERAL DRIVER ARCHITECTURE
- *
- * The i2400m driver is split in the following two major parts:
- *
- * - bus specific driver
- * - bus generic driver (this part)
- *
- * The bus specific driver sets up stuff specific to the bus the
- * device is connected to (USB, PCI, tam-tam...non-authoritative
- * nor binding list) which is basically the device-model management
- * (probe/disconnect, etc), moving data from device to kernel and
- * back, doing the power saving details and reseting the device.
- *
- * For details on each bus-specific driver, see it's include file,
- * i2400m-BUSNAME.h
- *
- * The bus-generic functionality break up is:
- *
- * - Firmware upload: fw.c - takes care of uploading firmware to the
- * device. bus-specific driver just needs to provides a way to
- * execute boot-mode commands and to reset the device.
- *
- * - RX handling: rx.c - receives data from the bus-specific code and
- * feeds it to the network or WiMAX stack or uses it to modify
- * the driver state. bus-specific driver only has to receive
- * frames and pass them to this module.
- *
- * - TX handling: tx.c - manages the TX FIFO queue and provides means
- * for the bus-specific TX code to pull data from the FIFO
- * queue. bus-specific code just pulls frames from this module
- * to sends them to the device.
- *
- * - netdev glue: netdev.c - interface with Linux networking
- * stack. Pass around data frames, and configure when the
- * device is up and running or shutdown (through ifconfig up /
- * down). Bus-generic only.
- *
- * - control ops: control.c - implements various commands for
- * controlling the device. bus-generic only.
- *
- * - device model glue: driver.c - implements helpers for the
- * device-model glue done by the bus-specific layer
- * (setup/release the driver resources), turning the device on
- * and off, handling the device reboots/resets and a few simple
- * WiMAX stack ops.
- *
- * Code is also broken up in linux-glue / device-glue.
- *
- * Linux glue contains functions that deal mostly with gluing with the
- * rest of the Linux kernel.
- *
- * Device-glue are functions that deal mostly with the way the device
- * does things and talk the device's language.
- *
- * device-glue code is licensed BSD so other open source OSes can take
- * it to implement their drivers.
- *
- *
- * APIs AND HEADER FILES
- *
- * This bus generic code exports three APIs:
- *
- * - HDI (host-device interface) definitions common to all busses
- * (include/linux/wimax/i2400m.h); these can be also used by user
- * space code.
- * - internal API for the bus-generic code
- * - external API for the bus-specific drivers
- *
- *
- * LIFE CYCLE:
- *
- * When the bus-specific driver probes, it allocates a network device
- * with enough space for it's data structue, that must contain a
- * &struct i2400m at the top.
- *
- * On probe, it needs to fill the i2400m members marked as [fill], as
- * well as i2400m->wimax_dev.net_dev and call i2400m_setup(). The
- * i2400m driver will only register with the WiMAX and network stacks;
- * the only access done to the device is to read the MAC address so we
- * can register a network device.
- *
- * The high-level call flow is:
- *
- * bus_probe()
- * i2400m_setup()
- * i2400m->bus_setup()
- * boot rom initialization / read mac addr
- * network / WiMAX stacks registration
- * i2400m_dev_start()
- * i2400m->bus_dev_start()
- * i2400m_dev_initialize()
- *
- * The reverse applies for a disconnect() call:
- *
- * bus_disconnect()
- * i2400m_release()
- * i2400m_dev_stop()
- * i2400m_dev_shutdown()
- * i2400m->bus_dev_stop()
- * network / WiMAX stack unregistration
- * i2400m->bus_release()
- *
- * At this point, control and data communications are possible.
- *
- * While the device is up, it might reset. The bus-specific driver has
- * to catch that situation and call i2400m_dev_reset_handle() to deal
- * with it (reset the internal driver structures and go back to square
- * one).
- */
-
-#ifndef __I2400M_H__
-#define __I2400M_H__
-
-#include <linux/usb.h>
-#include <linux/netdevice.h>
-#include <linux/completion.h>
-#include <linux/rwsem.h>
-#include <linux/atomic.h>
-#include "../net-wimax.h"
-#include "linux-wimax-i2400m.h"
-#include <asm/byteorder.h>
-
-enum {
-/* netdev interface */
- /*
- * Out of NWG spec (R1_v1.2.2), 3.3.3 ASN Bearer Plane MTU Size
- *
- * The MTU is 1400 or less
- */
- I2400M_MAX_MTU = 1400,
-};
-
-/* Misc constants */
-enum {
- /* Size of the Boot Mode Command buffer */
- I2400M_BM_CMD_BUF_SIZE = 16 * 1024,
- I2400M_BM_ACK_BUF_SIZE = 256,
-};
-
-enum {
- /* Maximum number of bus reset can be retried */
- I2400M_BUS_RESET_RETRIES = 3,
-};
-
-/**
- * struct i2400m_poke_table - Hardware poke table for the Intel 2400m
- *
- * This structure will be used to create a device specific poke table
- * to put the device in a consistent state at boot time.
- *
- * @address: The device address to poke
- *
- * @data: The data value to poke to the device address
- *
- */
-struct i2400m_poke_table{
- __le32 address;
- __le32 data;
-};
-
-#define I2400M_FW_POKE(a, d) { \
- .address = cpu_to_le32(a), \
- .data = cpu_to_le32(d) \
-}
-
-
-/**
- * i2400m_reset_type - methods to reset a device
- *
- * @I2400M_RT_WARM: Reset without device disconnection, device handles
- * are kept valid but state is back to power on, with firmware
- * re-uploaded.
- * @I2400M_RT_COLD: Tell the device to disconnect itself from the bus
- * and reconnect. Renders all device handles invalid.
- * @I2400M_RT_BUS: Tells the bus to reset the device; last measure
- * used when both types above don't work.
- */
-enum i2400m_reset_type {
- I2400M_RT_WARM, /* first measure */
- I2400M_RT_COLD, /* second measure */
- I2400M_RT_BUS, /* call in artillery */
-};
-
-struct i2400m_reset_ctx;
-struct i2400m_roq;
-struct i2400m_barker_db;
-
-/**
- * struct i2400m - descriptor for an Intel 2400m
- *
- * Members marked with [fill] must be filled out/initialized before
- * calling i2400m_setup().
- *
- * Note the @bus_setup/@..._release, @bus_dev_start/@..._dev_release
- * call pairs are very much doing almost the same, and depending on
- * the underlying bus, some stuff has to be put in one or the
- * other. The idea of setup/release is that they setup the minimal
- * amount needed for loading firmware, where us dev_start/stop setup
- * the rest needed to do full data/control traffic.
- *
- * @bus_tx_block_size: [fill] USB imposes a 16 block size, but other
- * busses will differ. So we have a tx_blk_size variable that the
- * bus layer sets to tell the engine how much of that we need.
- *
- * @bus_tx_room_min: [fill] Minimum room required while allocating
- * TX queue's buffer space for message header. USB requires
- * 16 bytes. Refer to bus specific driver code for details.
- *
- * @bus_pl_size_max: [fill] Maximum payload size.
- *
- * @bus_setup: [optional fill] Function called by the bus-generic code
- * [i2400m_setup()] to setup the basic bus-specific communications
- * to the the device needed to load firmware. See LIFE CYCLE above.
- *
- * NOTE: Doesn't need to upload the firmware, as that is taken
- * care of by the bus-generic code.
- *
- * @bus_release: [optional fill] Function called by the bus-generic
- * code [i2400m_release()] to shutdown the basic bus-specific
- * communications to the the device needed to load firmware. See
- * LIFE CYCLE above.
- *
- * This function does not need to reset the device, just tear down
- * all the host resources created to handle communication with
- * the device.
- *
- * @bus_dev_start: [optional fill] Function called by the bus-generic
- * code [i2400m_dev_start()] to do things needed to start the
- * device. See LIFE CYCLE above.
- *
- * NOTE: Doesn't need to upload the firmware, as that is taken
- * care of by the bus-generic code.
- *
- * @bus_dev_stop: [optional fill] Function called by the bus-generic
- * code [i2400m_dev_stop()] to do things needed for stopping the
- * device. See LIFE CYCLE above.
- *
- * This function does not need to reset the device, just tear down
- * all the host resources created to handle communication with
- * the device.
- *
- * @bus_tx_kick: [fill] Function called by the bus-generic code to let
- * the bus-specific code know that there is data available in the
- * TX FIFO for transmission to the device.
- *
- * This function cannot sleep.
- *
- * @bus_reset: [fill] Function called by the bus-generic code to reset
- * the device in in various ways. Doesn't need to wait for the
- * reset to finish.
- *
- * If warm or cold reset fail, this function is expected to do a
- * bus-specific reset (eg: USB reset) to get the device to a
- * working state (even if it implies device disconecction).
- *
- * Note the warm reset is used by the firmware uploader to
- * reinitialize the device.
- *
- * IMPORTANT: this is called very early in the device setup
- * process, so it cannot rely on common infrastructure being laid
- * out.
- *
- * IMPORTANT: don't call reset on RT_BUS with i2400m->init_mutex
- * held, as the .pre/.post reset handlers will deadlock.
- *
- * @bus_bm_retries: [fill] How many times shall a firmware upload /
- * device initialization be retried? Different models of the same
- * device might need different values, hence it is set by the
- * bus-specific driver. Note this value is used in two places,
- * i2400m_fw_dnload() and __i2400m_dev_start(); they won't become
- * multiplicative (__i2400m_dev_start() calling N times
- * i2400m_fw_dnload() and this trying N times to download the
- * firmware), as if __i2400m_dev_start() only retries if the
- * firmware crashed while initializing the device (not in a
- * general case).
- *
- * @bus_bm_cmd_send: [fill] Function called to send a boot-mode
- * command. Flags are defined in 'enum i2400m_bm_cmd_flags'. This
- * is synchronous and has to return 0 if ok or < 0 errno code in
- * any error condition.
- *
- * @bus_bm_wait_for_ack: [fill] Function called to wait for a
- * boot-mode notification (that can be a response to a previously
- * issued command or an asynchronous one). Will read until all the
- * indicated size is read or timeout. Reading more or less data
- * than asked for is an error condition. Return 0 if ok, < 0 errno
- * code on error.
- *
- * The caller to this function will check if the response is a
- * barker that indicates the device going into reset mode.
- *
- * @bus_fw_names: [fill] a NULL-terminated array with the names of the
- * firmware images to try loading. This is made a list so we can
- * support backward compatibility of firmware releases (eg: if we
- * can't find the default v1.4, we try v1.3). In general, the name
- * should be i2400m-fw-X-VERSION.sbcf, where X is the bus name.
- * The list is tried in order and the first one that loads is
- * used. The fw loader will set i2400m->fw_name to point to the
- * active firmware image.
- *
- * @bus_bm_mac_addr_impaired: [fill] Set to true if the device's MAC
- * address provided in boot mode is kind of broken and needs to
- * be re-read later on.
- *
- * @bus_bm_pokes_table: [fill/optional] A table of device addresses
- * and values that will be poked at device init time to move the
- * device to the correct state for the type of boot/firmware being
- * used. This table MUST be terminated with (0x000000,
- * 0x00000000) or bad things will happen.
- *
- *
- * @wimax_dev: WiMAX generic device for linkage into the kernel WiMAX
- * stack. Due to the way a net_device is allocated, we need to
- * force this to be the first field so that we can get from
- * netdev_priv() the right pointer.
- *
- * @updown: the device is up and ready for transmitting control and
- * data packets. This implies @ready (communication infrastructure
- * with the device is ready) and the device's firmware has been
- * loaded and the device initialized.
- *
- * Write to it only inside a i2400m->init_mutex protected area
- * followed with a wmb(); rmb() before accesing (unless locked
- * inside i2400m->init_mutex). Read access can be loose like that
- * [just using rmb()] because the paths that use this also do
- * other error checks later on.
- *
- * @ready: Communication infrastructure with the device is ready, data
- * frames can start to be passed around (this is lighter than
- * using the WiMAX state for certain hot paths).
- *
- * Write to it only inside a i2400m->init_mutex protected area
- * followed with a wmb(); rmb() before accesing (unless locked
- * inside i2400m->init_mutex). Read access can be loose like that
- * [just using rmb()] because the paths that use this also do
- * other error checks later on.
- *
- * @rx_reorder: 1 if RX reordering is enabled; this can only be
- * set at probe time.
- *
- * @state: device's state (as reported by it)
- *
- * @state_wq: waitqueue that is woken up whenever the state changes
- *
- * @tx_lock: spinlock to protect TX members
- *
- * @tx_buf: FIFO buffer for TX; we queue data here
- *
- * @tx_in: FIFO index for incoming data. Note this doesn't wrap around
- * and it is always greater than @tx_out.
- *
- * @tx_out: FIFO index for outgoing data
- *
- * @tx_msg: current TX message that is active in the FIFO for
- * appending payloads.
- *
- * @tx_sequence: current sequence number for TX messages from the
- * device to the host.
- *
- * @tx_msg_size: size of the current message being transmitted by the
- * bus-specific code.
- *
- * @tx_pl_num: total number of payloads sent
- *
- * @tx_pl_max: maximum number of payloads sent in a TX message
- *
- * @tx_pl_min: minimum number of payloads sent in a TX message
- *
- * @tx_num: number of TX messages sent
- *
- * @tx_size_acc: number of bytes in all TX messages sent
- * (this is different to net_dev's statistics as it also counts
- * control messages).
- *
- * @tx_size_min: smallest TX message sent.
- *
- * @tx_size_max: biggest TX message sent.
- *
- * @rx_lock: spinlock to protect RX members and rx_roq_refcount.
- *
- * @rx_pl_num: total number of payloads received
- *
- * @rx_pl_max: maximum number of payloads received in a RX message
- *
- * @rx_pl_min: minimum number of payloads received in a RX message
- *
- * @rx_num: number of RX messages received
- *
- * @rx_size_acc: number of bytes in all RX messages received
- * (this is different to net_dev's statistics as it also counts
- * control messages).
- *
- * @rx_size_min: smallest RX message received.
- *
- * @rx_size_max: buggest RX message received.
- *
- * @rx_roq: RX ReOrder queues. (fw >= v1.4) When packets are received
- * out of order, the device will ask the driver to hold certain
- * packets until the ones that are received out of order can be
- * delivered. Then the driver can release them to the host. See
- * drivers/net/i2400m/rx.c for details.
- *
- * @rx_roq_refcount: refcount rx_roq. This refcounts any access to
- * rx_roq thus preventing rx_roq being destroyed when rx_roq
- * is being accessed. rx_roq_refcount is protected by rx_lock.
- *
- * @rx_reports: reports received from the device that couldn't be
- * processed because the driver wasn't still ready; when ready,
- * they are pulled from here and chewed.
- *
- * @rx_reports_ws: Work struct used to kick a scan of the RX reports
- * list and to process each.
- *
- * @src_mac_addr: MAC address used to make ethernet packets be coming
- * from. This is generated at i2400m_setup() time and used during
- * the life cycle of the instance. See i2400m_fake_eth_header().
- *
- * @init_mutex: Mutex used for serializing the device bringup
- * sequence; this way if the device reboots in the middle, we
- * don't try to do a bringup again while we are tearing down the
- * one that failed.
- *
- * Can't reuse @msg_mutex because from within the bringup sequence
- * we need to send messages to the device and thus use @msg_mutex.
- *
- * @msg_mutex: mutex used to send control commands to the device (we
- * only allow one at a time, per host-device interface design).
- *
- * @msg_completion: used to wait for an ack to a control command sent
- * to the device.
- *
- * @ack_skb: used to store the actual ack to a control command if the
- * reception of the command was successful. Otherwise, a ERR_PTR()
- * errno code that indicates what failed with the ack reception.
- *
- * Only valid after @msg_completion is woken up. Only updateable
- * if @msg_completion is armed. Only touched by
- * i2400m_msg_to_dev().
- *
- * Protected by @rx_lock. In theory the command execution flow is
- * sequential, but in case the device sends an out-of-phase or
- * very delayed response, we need to avoid it trampling current
- * execution.
- *
- * @bm_cmd_buf: boot mode command buffer for composing firmware upload
- * commands.
- *
- * USB can't r/w to stack, vmalloc, etc...as well, we end up
- * having to alloc/free a lot to compose commands, so we use these
- * for stagging and not having to realloc all the time.
- *
- * This assumes the code always runs serialized. Only one thread
- * can call i2400m_bm_cmd() at the same time.
- *
- * @bm_ack_buf: boot mode acknoledge buffer for staging reception of
- * responses to commands.
- *
- * See @bm_cmd_buf.
- *
- * @work_queue: work queue for processing device reports. This
- * workqueue cannot be used for processing TX or RX to the device,
- * as from it we'll process device reports, which might require
- * further communication with the device.
- *
- * @debugfs_dentry: hookup for debugfs files.
- * These have to be in a separate directory, a child of
- * (wimax_dev->debugfs_dentry) so they can be removed when the
- * module unloads, as we don't keep each dentry.
- *
- * @fw_name: name of the firmware image that is currently being used.
- *
- * @fw_version: version of the firmware interface, Major.minor,
- * encoded in the high word and low word (major << 16 | minor).
- *
- * @fw_hdrs: NULL terminated array of pointers to the firmware
- * headers. This is only available during firmware load time.
- *
- * @fw_cached: Used to cache firmware when the system goes to
- * suspend/standby/hibernation (as on resume we can't read it). If
- * NULL, no firmware was cached, read it. If ~0, you can't read
- * any firmware files (the system still didn't come out of suspend
- * and failed to cache one), so abort; otherwise, a valid cached
- * firmware to be used. Access to this variable is protected by
- * the spinlock i2400m->rx_lock.
- *
- * @barker: barker type that the device uses; this is initialized by
- * i2400m_is_boot_barker() the first time it is called. Then it
- * won't change during the life cycle of the device and every time
- * a boot barker is received, it is just verified for it being the
- * same.
- *
- * @pm_notifier: used to register for PM events
- *
- * @bus_reset_retries: counter for the number of bus resets attempted for
- * this boot. It's not for tracking the number of bus resets during
- * the whole driver life cycle (from insmod to rmmod) but for the
- * number of dev_start() executed until dev_start() returns a success
- * (ie: a good boot means a dev_stop() followed by a successful
- * dev_start()). dev_reset_handler() increments this counter whenever
- * it is triggering a bus reset. It checks this counter to decide if a
- * subsequent bus reset should be retried. dev_reset_handler() retries
- * the bus reset until dev_start() succeeds or the counter reaches
- * I2400M_BUS_RESET_RETRIES. The counter is cleared to 0 in
- * dev_reset_handle() when dev_start() returns a success,
- * ie: a successul boot is completed.
- *
- * @alive: flag to denote if the device *should* be alive. This flag is
- * everything like @updown (see doc for @updown) except reflecting
- * the device state *we expect* rather than the actual state as denoted
- * by @updown. It is set 1 whenever @updown is set 1 in dev_start().
- * Then the device is expected to be alive all the time
- * (i2400m->alive remains 1) until the driver is removed. Therefore
- * all the device reboot events detected can be still handled properly
- * by either dev_reset_handle() or .pre_reset/.post_reset as long as
- * the driver presents. It is set 0 along with @updown in dev_stop().
- *
- * @error_recovery: flag to denote if we are ready to take an error recovery.
- * 0 for ready to take an error recovery; 1 for not ready. It is
- * initialized to 1 while probe() since we don't tend to take any error
- * recovery during probe(). It is decremented by 1 whenever dev_start()
- * succeeds to indicate we are ready to take error recovery from now on.
- * It is checked every time we wanna schedule an error recovery. If an
- * error recovery is already in place (error_recovery was set 1), we
- * should not schedule another one until the last one is done.
- */
-struct i2400m {
- struct wimax_dev wimax_dev; /* FIRST! See doc */
-
- unsigned updown:1; /* Network device is up or down */
- unsigned boot_mode:1; /* is the device in boot mode? */
- unsigned sboot:1; /* signed or unsigned fw boot */
- unsigned ready:1; /* Device comm infrastructure ready */
- unsigned rx_reorder:1; /* RX reorder is enabled */
- u8 trace_msg_from_user; /* echo rx msgs to 'trace' pipe */
- /* typed u8 so /sys/kernel/debug/u8 can tweak */
- enum i2400m_system_state state;
- wait_queue_head_t state_wq; /* Woken up when on state updates */
-
- size_t bus_tx_block_size;
- size_t bus_tx_room_min;
- size_t bus_pl_size_max;
- unsigned bus_bm_retries;
-
- int (*bus_setup)(struct i2400m *);
- int (*bus_dev_start)(struct i2400m *);
- void (*bus_dev_stop)(struct i2400m *);
- void (*bus_release)(struct i2400m *);
- void (*bus_tx_kick)(struct i2400m *);
- int (*bus_reset)(struct i2400m *, enum i2400m_reset_type);
- ssize_t (*bus_bm_cmd_send)(struct i2400m *,
- const struct i2400m_bootrom_header *,
- size_t, int flags);
- ssize_t (*bus_bm_wait_for_ack)(struct i2400m *,
- struct i2400m_bootrom_header *, size_t);
- const char **bus_fw_names;
- unsigned bus_bm_mac_addr_impaired:1;
- const struct i2400m_poke_table *bus_bm_pokes_table;
-
- spinlock_t tx_lock; /* protect TX state */
- void *tx_buf;
- size_t tx_in, tx_out;
- struct i2400m_msg_hdr *tx_msg;
- size_t tx_sequence, tx_msg_size;
- /* TX stats */
- unsigned tx_pl_num, tx_pl_max, tx_pl_min,
- tx_num, tx_size_acc, tx_size_min, tx_size_max;
-
- /* RX stuff */
- /* protect RX state and rx_roq_refcount */
- spinlock_t rx_lock;
- unsigned rx_pl_num, rx_pl_max, rx_pl_min,
- rx_num, rx_size_acc, rx_size_min, rx_size_max;
- struct i2400m_roq *rx_roq; /* access is refcounted */
- struct kref rx_roq_refcount; /* refcount access to rx_roq */
- u8 src_mac_addr[ETH_HLEN];
- struct list_head rx_reports; /* under rx_lock! */
- struct work_struct rx_report_ws;
-
- struct mutex msg_mutex; /* serialize command execution */
- struct completion msg_completion;
- struct sk_buff *ack_skb; /* protected by rx_lock */
-
- void *bm_ack_buf; /* for receiving acks over USB */
- void *bm_cmd_buf; /* for issuing commands over USB */
-
- struct workqueue_struct *work_queue;
-
- struct mutex init_mutex; /* protect bringup seq */
- struct i2400m_reset_ctx *reset_ctx; /* protected by init_mutex */
-
- struct work_struct wake_tx_ws;
- struct sk_buff *wake_tx_skb;
-
- struct work_struct reset_ws;
- const char *reset_reason;
-
- struct work_struct recovery_ws;
-
- struct dentry *debugfs_dentry;
- const char *fw_name; /* name of the current firmware image */
- unsigned long fw_version; /* version of the firmware interface */
- const struct i2400m_bcf_hdr **fw_hdrs;
- struct i2400m_fw *fw_cached; /* protected by rx_lock */
- struct i2400m_barker_db *barker;
-
- struct notifier_block pm_notifier;
-
- /* counting bus reset retries in this boot */
- atomic_t bus_reset_retries;
-
- /* if the device is expected to be alive */
- unsigned alive;
-
- /* 0 if we are ready for error recovery; 1 if not ready */
- atomic_t error_recovery;
-
-};
-
-
-/*
- * Bus-generic internal APIs
- * -------------------------
- */
-
-static inline
-struct i2400m *wimax_dev_to_i2400m(struct wimax_dev *wimax_dev)
-{
- return container_of(wimax_dev, struct i2400m, wimax_dev);
-}
-
-static inline
-struct i2400m *net_dev_to_i2400m(struct net_device *net_dev)
-{
- return wimax_dev_to_i2400m(netdev_priv(net_dev));
-}
-
-/*
- * Boot mode support
- */
-
-/**
- * i2400m_bm_cmd_flags - flags to i2400m_bm_cmd()
- *
- * @I2400M_BM_CMD_RAW: send the command block as-is, without doing any
- * extra processing for adding CRC.
- */
-enum i2400m_bm_cmd_flags {
- I2400M_BM_CMD_RAW = 1 << 2,
-};
-
-/**
- * i2400m_bri - Boot-ROM indicators
- *
- * Flags for i2400m_bootrom_init() and i2400m_dev_bootstrap() [which
- * are passed from things like i2400m_setup()]. Can be combined with
- * |.
- *
- * @I2400M_BRI_SOFT: The device rebooted already and a reboot
- * barker received, proceed directly to ack the boot sequence.
- * @I2400M_BRI_NO_REBOOT: Do not reboot the device and proceed
- * directly to wait for a reboot barker from the device.
- * @I2400M_BRI_MAC_REINIT: We need to reinitialize the boot
- * rom after reading the MAC address. This is quite a dirty hack,
- * if you ask me -- the device requires the bootrom to be
- * initialized after reading the MAC address.
- */
-enum i2400m_bri {
- I2400M_BRI_SOFT = 1 << 1,
- I2400M_BRI_NO_REBOOT = 1 << 2,
- I2400M_BRI_MAC_REINIT = 1 << 3,
-};
-
-void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *);
-int i2400m_dev_bootstrap(struct i2400m *, enum i2400m_bri);
-int i2400m_read_mac_addr(struct i2400m *);
-int i2400m_bootrom_init(struct i2400m *, enum i2400m_bri);
-int i2400m_is_boot_barker(struct i2400m *, const void *, size_t);
-static inline
-int i2400m_is_d2h_barker(const void *buf)
-{
- const __le32 *barker = buf;
- return le32_to_cpu(*barker) == I2400M_D2H_MSG_BARKER;
-}
-void i2400m_unknown_barker(struct i2400m *, const void *, size_t);
-
-/* Make/grok boot-rom header commands */
-
-static inline
-__le32 i2400m_brh_command(enum i2400m_brh_opcode opcode, unsigned use_checksum,
- unsigned direct_access)
-{
- return cpu_to_le32(
- I2400M_BRH_SIGNATURE
- | (direct_access ? I2400M_BRH_DIRECT_ACCESS : 0)
- | I2400M_BRH_RESPONSE_REQUIRED /* response always required */
- | (use_checksum ? I2400M_BRH_USE_CHECKSUM : 0)
- | (opcode & I2400M_BRH_OPCODE_MASK));
-}
-
-static inline
-void i2400m_brh_set_opcode(struct i2400m_bootrom_header *hdr,
- enum i2400m_brh_opcode opcode)
-{
- hdr->command = cpu_to_le32(
- (le32_to_cpu(hdr->command) & ~I2400M_BRH_OPCODE_MASK)
- | (opcode & I2400M_BRH_OPCODE_MASK));
-}
-
-static inline
-unsigned i2400m_brh_get_opcode(const struct i2400m_bootrom_header *hdr)
-{
- return le32_to_cpu(hdr->command) & I2400M_BRH_OPCODE_MASK;
-}
-
-static inline
-unsigned i2400m_brh_get_response(const struct i2400m_bootrom_header *hdr)
-{
- return (le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_MASK)
- >> I2400M_BRH_RESPONSE_SHIFT;
-}
-
-static inline
-unsigned i2400m_brh_get_use_checksum(const struct i2400m_bootrom_header *hdr)
-{
- return le32_to_cpu(hdr->command) & I2400M_BRH_USE_CHECKSUM;
-}
-
-static inline
-unsigned i2400m_brh_get_response_required(
- const struct i2400m_bootrom_header *hdr)
-{
- return le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_REQUIRED;
-}
-
-static inline
-unsigned i2400m_brh_get_direct_access(const struct i2400m_bootrom_header *hdr)
-{
- return le32_to_cpu(hdr->command) & I2400M_BRH_DIRECT_ACCESS;
-}
-
-static inline
-unsigned i2400m_brh_get_signature(const struct i2400m_bootrom_header *hdr)
-{
- return (le32_to_cpu(hdr->command) & I2400M_BRH_SIGNATURE_MASK)
- >> I2400M_BRH_SIGNATURE_SHIFT;
-}
-
-
-/*
- * Driver / device setup and internal functions
- */
-void i2400m_init(struct i2400m *);
-int i2400m_reset(struct i2400m *, enum i2400m_reset_type);
-void i2400m_netdev_setup(struct net_device *net_dev);
-int i2400m_sysfs_setup(struct device_driver *);
-void i2400m_sysfs_release(struct device_driver *);
-int i2400m_tx_setup(struct i2400m *);
-void i2400m_wake_tx_work(struct work_struct *);
-void i2400m_tx_release(struct i2400m *);
-
-int i2400m_rx_setup(struct i2400m *);
-void i2400m_rx_release(struct i2400m *);
-
-void i2400m_fw_cache(struct i2400m *);
-void i2400m_fw_uncache(struct i2400m *);
-
-void i2400m_net_rx(struct i2400m *, struct sk_buff *, unsigned, const void *,
- int);
-void i2400m_net_erx(struct i2400m *, struct sk_buff *, enum i2400m_cs);
-void i2400m_net_wake_stop(struct i2400m *);
-enum i2400m_pt;
-int i2400m_tx(struct i2400m *, const void *, size_t, enum i2400m_pt);
-
-#ifdef CONFIG_DEBUG_FS
-void i2400m_debugfs_add(struct i2400m *);
-void i2400m_debugfs_rm(struct i2400m *);
-#else
-static inline void i2400m_debugfs_add(struct i2400m *i2400m) {}
-static inline void i2400m_debugfs_rm(struct i2400m *i2400m) {}
-#endif
-
-/* Initialize/shutdown the device */
-int i2400m_dev_initialize(struct i2400m *);
-void i2400m_dev_shutdown(struct i2400m *);
-
-extern struct attribute_group i2400m_dev_attr_group;
-
-
-/* HDI message's payload description handling */
-
-static inline
-size_t i2400m_pld_size(const struct i2400m_pld *pld)
-{
- return I2400M_PLD_SIZE_MASK & le32_to_cpu(pld->val);
-}
-
-static inline
-enum i2400m_pt i2400m_pld_type(const struct i2400m_pld *pld)
-{
- return (I2400M_PLD_TYPE_MASK & le32_to_cpu(pld->val))
- >> I2400M_PLD_TYPE_SHIFT;
-}
-
-static inline
-void i2400m_pld_set(struct i2400m_pld *pld, size_t size,
- enum i2400m_pt type)
-{
- pld->val = cpu_to_le32(
- ((type << I2400M_PLD_TYPE_SHIFT) & I2400M_PLD_TYPE_MASK)
- | (size & I2400M_PLD_SIZE_MASK));
-}
-
-
-/*
- * API for the bus-specific drivers
- * --------------------------------
- */
-
-static inline
-struct i2400m *i2400m_get(struct i2400m *i2400m)
-{
- dev_hold(i2400m->wimax_dev.net_dev);
- return i2400m;
-}
-
-static inline
-void i2400m_put(struct i2400m *i2400m)
-{
- dev_put(i2400m->wimax_dev.net_dev);
-}
-
-int i2400m_dev_reset_handle(struct i2400m *, const char *);
-int i2400m_pre_reset(struct i2400m *);
-int i2400m_post_reset(struct i2400m *);
-void i2400m_error_recovery(struct i2400m *);
-
-/*
- * _setup()/_release() are called by the probe/disconnect functions of
- * the bus-specific drivers.
- */
-int i2400m_setup(struct i2400m *, enum i2400m_bri bm_flags);
-void i2400m_release(struct i2400m *);
-
-int i2400m_rx(struct i2400m *, struct sk_buff *);
-struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *, size_t *);
-void i2400m_tx_msg_sent(struct i2400m *);
-
-
-/*
- * Utility functions
- */
-
-static inline
-struct device *i2400m_dev(struct i2400m *i2400m)
-{
- return i2400m->wimax_dev.net_dev->dev.parent;
-}
-
-int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *, char *, size_t);
-int i2400m_msg_size_check(struct i2400m *, const struct i2400m_l3l4_hdr *,
- size_t);
-struct sk_buff *i2400m_msg_to_dev(struct i2400m *, const void *, size_t);
-void i2400m_msg_to_dev_cancel_wait(struct i2400m *, int);
-void i2400m_report_hook(struct i2400m *, const struct i2400m_l3l4_hdr *,
- size_t);
-void i2400m_report_hook_work(struct work_struct *);
-int i2400m_cmd_enter_powersave(struct i2400m *);
-int i2400m_cmd_exit_idle(struct i2400m *);
-struct sk_buff *i2400m_get_device_info(struct i2400m *);
-int i2400m_firmware_check(struct i2400m *);
-int i2400m_set_idle_timeout(struct i2400m *, unsigned);
-
-static inline
-struct usb_endpoint_descriptor *usb_get_epd(struct usb_interface *iface, int ep)
-{
- return &iface->cur_altsetting->endpoint[ep].desc;
-}
-
-int i2400m_op_rfkill_sw_toggle(struct wimax_dev *, enum wimax_rf_state);
-void i2400m_report_tlv_rf_switches_status(struct i2400m *,
- const struct i2400m_tlv_rf_switches_status *);
-
-/*
- * Helpers for firmware backwards compatibility
- *
- * As we aim to support at least the firmware version that was
- * released with the previous kernel/driver release, some code will be
- * conditionally executed depending on the firmware version. On each
- * release, the code to support fw releases past the last two ones
- * will be purged.
- *
- * By making it depend on this macros, it is easier to keep it a tab
- * on what has to go and what not.
- */
-static inline
-unsigned i2400m_le_v1_3(struct i2400m *i2400m)
-{
- /* running fw is lower or v1.3 */
- return i2400m->fw_version <= 0x00090001;
-}
-
-static inline
-unsigned i2400m_ge_v1_4(struct i2400m *i2400m)
-{
- /* running fw is higher or v1.4 */
- return i2400m->fw_version >= 0x00090002;
-}
-
-
-/*
- * Do a millisecond-sleep for allowing wireshark to dump all the data
- * packets. Used only for debugging.
- */
-static inline
-void __i2400m_msleep(unsigned ms)
-{
-#if 1
-#else
- msleep(ms);
-#endif
-}
-
-
-/* module initialization helpers */
-int i2400m_barker_db_init(const char *);
-void i2400m_barker_db_exit(void);
-
-
-
-#endif /* #ifndef __I2400M_H__ */
diff --git a/drivers/staging/wimax/i2400m/linux-wimax-i2400m.h b/drivers/staging/wimax/i2400m/linux-wimax-i2400m.h
deleted file mode 100644
index fd198bc24a3c..000000000000
--- a/drivers/staging/wimax/i2400m/linux-wimax-i2400m.h
+++ /dev/null
@@ -1,572 +0,0 @@
-/*
- * Intel Wireless WiMax Connection 2400m
- * Host-Device protocol interface definitions
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- *
- * This header defines the data structures and constants used to
- * communicate with the device.
- *
- * BOOTMODE/BOOTROM/FIRMWARE UPLOAD PROTOCOL
- *
- * The firmware upload protocol is quite simple and only requires a
- * handful of commands. See drivers/net/wimax/i2400m/fw.c for more
- * details.
- *
- * The BCF data structure is for the firmware file header.
- *
- *
- * THE DATA / CONTROL PROTOCOL
- *
- * This is the normal protocol spoken with the device once the
- * firmware is uploaded. It transports data payloads and control
- * messages back and forth.
- *
- * It consists 'messages' that pack one or more payloads each. The
- * format is described in detail in drivers/net/wimax/i2400m/rx.c and
- * tx.c.
- *
- *
- * THE L3L4 PROTOCOL
- *
- * The term L3L4 refers to Layer 3 (the device), Layer 4 (the
- * driver/host software).
- *
- * This is the control protocol used by the host to control the i2400m
- * device (scan, connect, disconnect...). This is sent to / received
- * as control frames. These frames consist of a header and zero or
- * more TLVs with information. We call each control frame a "message".
- *
- * Each message is composed of:
- *
- * HEADER
- * [TLV0 + PAYLOAD0]
- * [TLV1 + PAYLOAD1]
- * [...]
- * [TLVN + PAYLOADN]
- *
- * The HEADER is defined by 'struct i2400m_l3l4_hdr'. The payloads are
- * defined by a TLV structure (Type Length Value) which is a 'header'
- * (struct i2400m_tlv_hdr) and then the payload.
- *
- * All integers are represented as Little Endian.
- *
- * - REQUESTS AND EVENTS
- *
- * The requests can be clasified as follows:
- *
- * COMMAND: implies a request from the host to the device requesting
- * an action being performed. The device will reply with a
- * message (with the same type as the command), status and
- * no (TLV) payload. Execution of a command might cause
- * events (of different type) to be sent later on as
- * device's state changes.
- *
- * GET/SET: similar to COMMAND, but will not cause other
- * EVENTs. The reply, in the case of GET, will contain
- * TLVs with the requested information.
- *
- * EVENT: asynchronous messages sent from the device, maybe as a
- * consequence of previous COMMANDs but disassociated from
- * them.
- *
- * Only one request might be pending at the same time (ie: don't
- * parallelize nor post another GET request before the previous
- * COMMAND has been acknowledged with it's corresponding reply by the
- * device).
- *
- * The different requests and their formats are described below:
- *
- * I2400M_MT_* Message types
- * I2400M_MS_* Message status (for replies, events)
- * i2400m_tlv_* TLVs
- *
- * data types are named 'struct i2400m_msg_OPNAME', OPNAME matching the
- * operation.
- */
-
-#ifndef __LINUX__WIMAX__I2400M_H__
-#define __LINUX__WIMAX__I2400M_H__
-
-#include <linux/types.h>
-#include <linux/if_ether.h>
-
-/*
- * Host Device Interface (HDI) common to all busses
- */
-
-/* Boot-mode (firmware upload mode) commands */
-
-/* Header for the firmware file */
-struct i2400m_bcf_hdr {
- __le32 module_type;
- __le32 header_len;
- __le32 header_version;
- __le32 module_id;
- __le32 module_vendor;
- __le32 date; /* BCD YYYMMDD */
- __le32 size; /* in dwords */
- __le32 key_size; /* in dwords */
- __le32 modulus_size; /* in dwords */
- __le32 exponent_size; /* in dwords */
- __u8 reserved[88];
-} __attribute__ ((packed));
-
-/* Boot mode opcodes */
-enum i2400m_brh_opcode {
- I2400M_BRH_READ = 1,
- I2400M_BRH_WRITE = 2,
- I2400M_BRH_JUMP = 3,
- I2400M_BRH_SIGNED_JUMP = 8,
- I2400M_BRH_HASH_PAYLOAD_ONLY = 9,
-};
-
-/* Boot mode command masks and stuff */
-enum i2400m_brh {
- I2400M_BRH_SIGNATURE = 0xcbbc0000,
- I2400M_BRH_SIGNATURE_MASK = 0xffff0000,
- I2400M_BRH_SIGNATURE_SHIFT = 16,
- I2400M_BRH_OPCODE_MASK = 0x0000000f,
- I2400M_BRH_RESPONSE_MASK = 0x000000f0,
- I2400M_BRH_RESPONSE_SHIFT = 4,
- I2400M_BRH_DIRECT_ACCESS = 0x00000400,
- I2400M_BRH_RESPONSE_REQUIRED = 0x00000200,
- I2400M_BRH_USE_CHECKSUM = 0x00000100,
-};
-
-
-/**
- * i2400m_bootrom_header - Header for a boot-mode command
- *
- * @cmd: the above command descriptor
- * @target_addr: where on the device memory should the action be performed.
- * @data_size: for read/write, amount of data to be read/written
- * @block_checksum: checksum value (if applicable)
- * @payload: the beginning of data attached to this header
- */
-struct i2400m_bootrom_header {
- __le32 command; /* Compose with enum i2400_brh */
- __le32 target_addr;
- __le32 data_size;
- __le32 block_checksum;
- char payload[0];
-} __attribute__ ((packed));
-
-
-/*
- * Data / control protocol
- */
-
-/* Packet types for the host-device interface */
-enum i2400m_pt {
- I2400M_PT_DATA = 0,
- I2400M_PT_CTRL,
- I2400M_PT_TRACE, /* For device debug */
- I2400M_PT_RESET_WARM, /* device reset */
- I2400M_PT_RESET_COLD, /* USB[transport] reset, like reconnect */
- I2400M_PT_EDATA, /* Extended RX data */
- I2400M_PT_ILLEGAL
-};
-
-
-/*
- * Payload for a data packet
- *
- * This is prefixed to each and every outgoing DATA type.
- */
-struct i2400m_pl_data_hdr {
- __le32 reserved;
-} __attribute__((packed));
-
-
-/*
- * Payload for an extended data packet
- *
- * New in fw v1.4
- *
- * @reorder: if this payload has to be reorder or not (and how)
- * @cs: the type of data in the packet, as defined per (802.16e
- * T11.13.19.1). Currently only 2 (IPv4 packet) supported.
- *
- * This is prefixed to each and every INCOMING DATA packet.
- */
-struct i2400m_pl_edata_hdr {
- __le32 reorder; /* bits defined in i2400m_ro */
- __u8 cs;
- __u8 reserved[11];
-} __attribute__((packed));
-
-enum i2400m_cs {
- I2400M_CS_IPV4_0 = 0,
- I2400M_CS_IPV4 = 2,
-};
-
-enum i2400m_ro {
- I2400M_RO_NEEDED = 0x01,
- I2400M_RO_TYPE = 0x03,
- I2400M_RO_TYPE_SHIFT = 1,
- I2400M_RO_CIN = 0x0f,
- I2400M_RO_CIN_SHIFT = 4,
- I2400M_RO_FBN = 0x07ff,
- I2400M_RO_FBN_SHIFT = 8,
- I2400M_RO_SN = 0x07ff,
- I2400M_RO_SN_SHIFT = 21,
-};
-
-enum i2400m_ro_type {
- I2400M_RO_TYPE_RESET = 0,
- I2400M_RO_TYPE_PACKET,
- I2400M_RO_TYPE_WS,
- I2400M_RO_TYPE_PACKET_WS,
-};
-
-
-/* Misc constants */
-enum {
- I2400M_PL_ALIGN = 16, /* Payload data size alignment */
- I2400M_PL_SIZE_MAX = 0x3EFF,
- I2400M_MAX_PLS_IN_MSG = 60,
- /* protocol barkers: sync sequences; for notifications they
- * are sent in groups of four. */
- I2400M_H2D_PREVIEW_BARKER = 0xcafe900d,
- I2400M_COLD_RESET_BARKER = 0xc01dc01d,
- I2400M_WARM_RESET_BARKER = 0x50f750f7,
- I2400M_NBOOT_BARKER = 0xdeadbeef,
- I2400M_SBOOT_BARKER = 0x0ff1c1a1,
- I2400M_SBOOT_BARKER_6050 = 0x80000001,
- I2400M_ACK_BARKER = 0xfeedbabe,
- I2400M_D2H_MSG_BARKER = 0xbeefbabe,
-};
-
-
-/*
- * Hardware payload descriptor
- *
- * Bitfields encoded in a struct to enforce typing semantics.
- *
- * Look in rx.c and tx.c for a full description of the format.
- */
-struct i2400m_pld {
- __le32 val;
-} __attribute__ ((packed));
-
-#define I2400M_PLD_SIZE_MASK 0x00003fff
-#define I2400M_PLD_TYPE_SHIFT 16
-#define I2400M_PLD_TYPE_MASK 0x000f0000
-
-/*
- * Header for a TX message or RX message
- *
- * @barker: preamble
- * @size: used for management of the FIFO queue buffer; before
- * sending, this is converted to be a real preamble. This
- * indicates the real size of the TX message that starts at this
- * point. If the highest bit is set, then this message is to be
- * skipped.
- * @sequence: sequence number of this message
- * @offset: offset where the message itself starts -- see the comments
- * in the file header about message header and payload descriptor
- * alignment.
- * @num_pls: number of payloads in this message
- * @padding: amount of padding bytes at the end of the message to make
- * it be of block-size aligned
- *
- * Look in rx.c and tx.c for a full description of the format.
- */
-struct i2400m_msg_hdr {
- union {
- __le32 barker;
- __u32 size; /* same size type as barker!! */
- };
- union {
- __le32 sequence;
- __u32 offset; /* same size type as barker!! */
- };
- __le16 num_pls;
- __le16 rsv1;
- __le16 padding;
- __le16 rsv2;
- struct i2400m_pld pld[0];
-} __attribute__ ((packed));
-
-
-
-/*
- * L3/L4 control protocol
- */
-
-enum {
- /* Interface version */
- I2400M_L3L4_VERSION = 0x0100,
-};
-
-/* Message types */
-enum i2400m_mt {
- I2400M_MT_RESERVED = 0x0000,
- I2400M_MT_INVALID = 0xffff,
- I2400M_MT_REPORT_MASK = 0x8000,
-
- I2400M_MT_GET_SCAN_RESULT = 0x4202,
- I2400M_MT_SET_SCAN_PARAM = 0x4402,
- I2400M_MT_CMD_RF_CONTROL = 0x4602,
- I2400M_MT_CMD_SCAN = 0x4603,
- I2400M_MT_CMD_CONNECT = 0x4604,
- I2400M_MT_CMD_DISCONNECT = 0x4605,
- I2400M_MT_CMD_EXIT_IDLE = 0x4606,
- I2400M_MT_GET_LM_VERSION = 0x5201,
- I2400M_MT_GET_DEVICE_INFO = 0x5202,
- I2400M_MT_GET_LINK_STATUS = 0x5203,
- I2400M_MT_GET_STATISTICS = 0x5204,
- I2400M_MT_GET_STATE = 0x5205,
- I2400M_MT_GET_MEDIA_STATUS = 0x5206,
- I2400M_MT_SET_INIT_CONFIG = 0x5404,
- I2400M_MT_CMD_INIT = 0x5601,
- I2400M_MT_CMD_TERMINATE = 0x5602,
- I2400M_MT_CMD_MODE_OF_OP = 0x5603,
- I2400M_MT_CMD_RESET_DEVICE = 0x5604,
- I2400M_MT_CMD_MONITOR_CONTROL = 0x5605,
- I2400M_MT_CMD_ENTER_POWERSAVE = 0x5606,
- I2400M_MT_GET_TLS_OPERATION_RESULT = 0x6201,
- I2400M_MT_SET_EAP_SUCCESS = 0x6402,
- I2400M_MT_SET_EAP_FAIL = 0x6403,
- I2400M_MT_SET_EAP_KEY = 0x6404,
- I2400M_MT_CMD_SEND_EAP_RESPONSE = 0x6602,
- I2400M_MT_REPORT_SCAN_RESULT = 0xc002,
- I2400M_MT_REPORT_STATE = 0xd002,
- I2400M_MT_REPORT_POWERSAVE_READY = 0xd005,
- I2400M_MT_REPORT_EAP_REQUEST = 0xe002,
- I2400M_MT_REPORT_EAP_RESTART = 0xe003,
- I2400M_MT_REPORT_ALT_ACCEPT = 0xe004,
- I2400M_MT_REPORT_KEY_REQUEST = 0xe005,
-};
-
-
-/*
- * Message Ack Status codes
- *
- * When a message is replied-to, this status is reported.
- */
-enum i2400m_ms {
- I2400M_MS_DONE_OK = 0,
- I2400M_MS_DONE_IN_PROGRESS = 1,
- I2400M_MS_INVALID_OP = 2,
- I2400M_MS_BAD_STATE = 3,
- I2400M_MS_ILLEGAL_VALUE = 4,
- I2400M_MS_MISSING_PARAMS = 5,
- I2400M_MS_VERSION_ERROR = 6,
- I2400M_MS_ACCESSIBILITY_ERROR = 7,
- I2400M_MS_BUSY = 8,
- I2400M_MS_CORRUPTED_TLV = 9,
- I2400M_MS_UNINITIALIZED = 10,
- I2400M_MS_UNKNOWN_ERROR = 11,
- I2400M_MS_PRODUCTION_ERROR = 12,
- I2400M_MS_NO_RF = 13,
- I2400M_MS_NOT_READY_FOR_POWERSAVE = 14,
- I2400M_MS_THERMAL_CRITICAL = 15,
- I2400M_MS_MAX
-};
-
-
-/**
- * i2400m_tlv - enumeration of the different types of TLVs
- *
- * TLVs stand for type-length-value and are the header for a payload
- * composed of almost anything. Each payload has a type assigned
- * and a length.
- */
-enum i2400m_tlv {
- I2400M_TLV_L4_MESSAGE_VERSIONS = 129,
- I2400M_TLV_SYSTEM_STATE = 141,
- I2400M_TLV_MEDIA_STATUS = 161,
- I2400M_TLV_RF_OPERATION = 162,
- I2400M_TLV_RF_STATUS = 163,
- I2400M_TLV_DEVICE_RESET_TYPE = 132,
- I2400M_TLV_CONFIG_IDLE_PARAMETERS = 601,
- I2400M_TLV_CONFIG_IDLE_TIMEOUT = 611,
- I2400M_TLV_CONFIG_D2H_DATA_FORMAT = 614,
- I2400M_TLV_CONFIG_DL_HOST_REORDER = 615,
-};
-
-
-struct i2400m_tlv_hdr {
- __le16 type;
- __le16 length; /* payload's */
- __u8 pl[0];
-} __attribute__((packed));
-
-
-struct i2400m_l3l4_hdr {
- __le16 type;
- __le16 length; /* payload's */
- __le16 version;
- __le16 resv1;
- __le16 status;
- __le16 resv2;
- struct i2400m_tlv_hdr pl[0];
-} __attribute__((packed));
-
-
-/**
- * i2400m_system_state - different states of the device
- */
-enum i2400m_system_state {
- I2400M_SS_UNINITIALIZED = 1,
- I2400M_SS_INIT,
- I2400M_SS_READY,
- I2400M_SS_SCAN,
- I2400M_SS_STANDBY,
- I2400M_SS_CONNECTING,
- I2400M_SS_WIMAX_CONNECTED,
- I2400M_SS_DATA_PATH_CONNECTED,
- I2400M_SS_IDLE,
- I2400M_SS_DISCONNECTING,
- I2400M_SS_OUT_OF_ZONE,
- I2400M_SS_SLEEPACTIVE,
- I2400M_SS_PRODUCTION,
- I2400M_SS_CONFIG,
- I2400M_SS_RF_OFF,
- I2400M_SS_RF_SHUTDOWN,
- I2400M_SS_DEVICE_DISCONNECT,
- I2400M_SS_MAX,
-};
-
-
-/**
- * i2400m_tlv_system_state - report on the state of the system
- *
- * @state: see enum i2400m_system_state
- */
-struct i2400m_tlv_system_state {
- struct i2400m_tlv_hdr hdr;
- __le32 state;
-} __attribute__((packed));
-
-
-struct i2400m_tlv_l4_message_versions {
- struct i2400m_tlv_hdr hdr;
- __le16 major;
- __le16 minor;
- __le16 branch;
- __le16 reserved;
-} __attribute__((packed));
-
-
-struct i2400m_tlv_detailed_device_info {
- struct i2400m_tlv_hdr hdr;
- __u8 reserved1[400];
- __u8 mac_address[ETH_ALEN];
- __u8 reserved2[2];
-} __attribute__((packed));
-
-
-enum i2400m_rf_switch_status {
- I2400M_RF_SWITCH_ON = 1,
- I2400M_RF_SWITCH_OFF = 2,
-};
-
-struct i2400m_tlv_rf_switches_status {
- struct i2400m_tlv_hdr hdr;
- __u8 sw_rf_switch; /* 1 ON, 2 OFF */
- __u8 hw_rf_switch; /* 1 ON, 2 OFF */
- __u8 reserved[2];
-} __attribute__((packed));
-
-
-enum {
- i2400m_rf_operation_on = 1,
- i2400m_rf_operation_off = 2
-};
-
-struct i2400m_tlv_rf_operation {
- struct i2400m_tlv_hdr hdr;
- __le32 status; /* 1 ON, 2 OFF */
-} __attribute__((packed));
-
-
-enum i2400m_tlv_reset_type {
- I2400M_RESET_TYPE_COLD = 1,
- I2400M_RESET_TYPE_WARM
-};
-
-struct i2400m_tlv_device_reset_type {
- struct i2400m_tlv_hdr hdr;
- __le32 reset_type;
-} __attribute__((packed));
-
-
-struct i2400m_tlv_config_idle_parameters {
- struct i2400m_tlv_hdr hdr;
- __le32 idle_timeout; /* 100 to 300000 ms [5min], 100 increments
- * 0 disabled */
- __le32 idle_paging_interval; /* frames */
-} __attribute__((packed));
-
-
-enum i2400m_media_status {
- I2400M_MEDIA_STATUS_LINK_UP = 1,
- I2400M_MEDIA_STATUS_LINK_DOWN,
- I2400M_MEDIA_STATUS_LINK_RENEW,
-};
-
-struct i2400m_tlv_media_status {
- struct i2400m_tlv_hdr hdr;
- __le32 media_status;
-} __attribute__((packed));
-
-
-/* New in v1.4 */
-struct i2400m_tlv_config_idle_timeout {
- struct i2400m_tlv_hdr hdr;
- __le32 timeout; /* 100 to 300000 ms [5min], 100 increments
- * 0 disabled */
-} __attribute__((packed));
-
-/* New in v1.4 -- for backward compat, will be removed */
-struct i2400m_tlv_config_d2h_data_format {
- struct i2400m_tlv_hdr hdr;
- __u8 format; /* 0 old format, 1 enhanced */
- __u8 reserved[3];
-} __attribute__((packed));
-
-/* New in v1.4 */
-struct i2400m_tlv_config_dl_host_reorder {
- struct i2400m_tlv_hdr hdr;
- __u8 reorder; /* 0 disabled, 1 enabled */
- __u8 reserved[3];
-} __attribute__((packed));
-
-
-#endif /* #ifndef __LINUX__WIMAX__I2400M_H__ */
diff --git a/drivers/staging/wimax/i2400m/netdev.c b/drivers/staging/wimax/i2400m/netdev.c
deleted file mode 100644
index 5b53e59084c8..000000000000
--- a/drivers/staging/wimax/i2400m/netdev.c
+++ /dev/null
@@ -1,603 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Glue with the networking stack
- *
- * Copyright (C) 2007 Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This implements an ethernet device for the i2400m.
- *
- * We fake being an ethernet device to simplify the support from user
- * space and from the other side. The world is (sadly) configured to
- * take in only Ethernet devices...
- *
- * Because of this, when using firmwares <= v1.3, there is an
- * copy-each-rxed-packet overhead on the RX path. Each IP packet has
- * to be reallocated to add an ethernet header (as there is no space
- * in what we get from the device). This is a known drawback and
- * firmwares >= 1.4 add header space that can be used to insert the
- * ethernet header without having to reallocate and copy.
- *
- * TX error handling is tricky; because we have to FIFO/queue the
- * buffers for transmission (as the hardware likes it aggregated), we
- * just give the skb to the TX subsystem and by the time it is
- * transmitted, we have long forgotten about it. So we just don't care
- * too much about it.
- *
- * Note that when the device is in idle mode with the basestation, we
- * need to negotiate coming back up online. That involves negotiation
- * and possible user space interaction. Thus, we defer to a workqueue
- * to do all that. By default, we only queue a single packet and drop
- * the rest, as potentially the time to go back from idle to normal is
- * long.
- *
- * ROADMAP
- *
- * i2400m_open Called on ifconfig up
- * i2400m_stop Called on ifconfig down
- *
- * i2400m_hard_start_xmit Called by the network stack to send a packet
- * i2400m_net_wake_tx Wake up device from basestation-IDLE & TX
- * i2400m_wake_tx_work
- * i2400m_cmd_exit_idle
- * i2400m_tx
- * i2400m_net_tx TX a data frame
- * i2400m_tx
- *
- * i2400m_change_mtu Called on ifconfig mtu XXX
- *
- * i2400m_tx_timeout Called when the device times out
- *
- * i2400m_net_rx Called by the RX code when a data frame is
- * available (firmware <= 1.3)
- * i2400m_net_erx Called by the RX code when a data frame is
- * available (firmware >= 1.4).
- * i2400m_netdev_setup Called to setup all the netdev stuff from
- * alloc_netdev.
- */
-#include <linux/if_arp.h>
-#include <linux/slab.h>
-#include <linux/netdevice.h>
-#include <linux/ethtool.h>
-#include <linux/export.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE netdev
-#include "debug-levels.h"
-
-enum {
-/* netdev interface */
- /* 20 secs? yep, this is the maximum timeout that the device
- * might take to get out of IDLE / negotiate it with the base
- * station. We add 1sec for good measure. */
- I2400M_TX_TIMEOUT = 21 * HZ,
- /*
- * Experimentation has determined that, 20 to be a good value
- * for minimizing the jitter in the throughput.
- */
- I2400M_TX_QLEN = 20,
-};
-
-
-static
-int i2400m_open(struct net_device *net_dev)
-{
- int result;
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
- /* Make sure we wait until init is complete... */
- mutex_lock(&i2400m->init_mutex);
- if (i2400m->updown)
- result = 0;
- else
- result = -EBUSY;
- mutex_unlock(&i2400m->init_mutex);
- d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
- net_dev, i2400m, result);
- return result;
-}
-
-
-static
-int i2400m_stop(struct net_device *net_dev)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
- i2400m_net_wake_stop(i2400m);
- d_fnend(3, dev, "(net_dev %p [i2400m %p]) = 0\n", net_dev, i2400m);
- return 0;
-}
-
-
-/*
- * Wake up the device and transmit a held SKB, then restart the net queue
- *
- * When the device goes into basestation-idle mode, we need to tell it
- * to exit that mode; it will negotiate with the base station, user
- * space may have to intervene to rehandshake crypto and then tell us
- * when it is ready to transmit the packet we have "queued". Still we
- * need to give it sometime after it reports being ok.
- *
- * On error, there is not much we can do. If the error was on TX, we
- * still wake the queue up to see if the next packet will be luckier.
- *
- * If _cmd_exit_idle() fails...well, it could be many things; most
- * commonly it is that something else took the device out of IDLE mode
- * (for example, the base station). In that case we get an -EILSEQ and
- * we are just going to ignore that one. If the device is back to
- * connected, then fine -- if it is someother state, the packet will
- * be dropped anyway.
- */
-void i2400m_wake_tx_work(struct work_struct *ws)
-{
- int result;
- struct i2400m *i2400m = container_of(ws, struct i2400m, wake_tx_ws);
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb;
- unsigned long flags;
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- skb = i2400m->wake_tx_skb;
- i2400m->wake_tx_skb = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- d_fnstart(3, dev, "(ws %p i2400m %p skb %p)\n", ws, i2400m, skb);
- result = -EINVAL;
- if (skb == NULL) {
- dev_err(dev, "WAKE&TX: skb disappeared!\n");
- goto out_put;
- }
- /* If we have, somehow, lost the connection after this was
- * queued, don't do anything; this might be the device got
- * reset or just disconnected. */
- if (unlikely(!netif_carrier_ok(net_dev)))
- goto out_kfree;
- result = i2400m_cmd_exit_idle(i2400m);
- if (result == -EILSEQ)
- result = 0;
- if (result < 0) {
- dev_err(dev, "WAKE&TX: device didn't get out of idle: "
- "%d - resetting\n", result);
- i2400m_reset(i2400m, I2400M_RT_BUS);
- goto error;
- }
- result = wait_event_timeout(i2400m->state_wq,
- i2400m->state != I2400M_SS_IDLE,
- net_dev->watchdog_timeo - HZ/2);
- if (result == 0)
- result = -ETIMEDOUT;
- if (result < 0) {
- dev_err(dev, "WAKE&TX: error waiting for device to exit IDLE: "
- "%d - resetting\n", result);
- i2400m_reset(i2400m, I2400M_RT_BUS);
- goto error;
- }
- msleep(20); /* device still needs some time or it drops it */
- result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
-error:
- netif_wake_queue(net_dev);
-out_kfree:
- kfree_skb(skb); /* refcount transferred by _hard_start_xmit() */
-out_put:
- i2400m_put(i2400m);
- d_fnend(3, dev, "(ws %p i2400m %p skb %p) = void [%d]\n",
- ws, i2400m, skb, result);
-}
-
-
-/*
- * Prepare the data payload TX header
- *
- * The i2400m expects a 4 byte header in front of a data packet.
- *
- * Because we pretend to be an ethernet device, this packet comes with
- * an ethernet header. Pull it and push our header.
- */
-static
-void i2400m_tx_prep_header(struct sk_buff *skb)
-{
- struct i2400m_pl_data_hdr *pl_hdr;
- skb_pull(skb, ETH_HLEN);
- pl_hdr = skb_push(skb, sizeof(*pl_hdr));
- pl_hdr->reserved = 0;
-}
-
-
-
-/*
- * Cleanup resources acquired during i2400m_net_wake_tx()
- *
- * This is called by __i2400m_dev_stop and means we have to make sure
- * the workqueue is flushed from any pending work.
- */
-void i2400m_net_wake_stop(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *wake_tx_skb;
- unsigned long flags;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- /*
- * See i2400m_hard_start_xmit(), references are taken there and
- * here we release them if the packet was still pending.
- */
- cancel_work_sync(&i2400m->wake_tx_ws);
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- wake_tx_skb = i2400m->wake_tx_skb;
- i2400m->wake_tx_skb = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- if (wake_tx_skb) {
- i2400m_put(i2400m);
- kfree_skb(wake_tx_skb);
- }
-
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-
-/*
- * TX an skb to an idle device
- *
- * When the device is in basestation-idle mode, we need to wake it up
- * and then TX. So we queue a work_struct for doing so.
- *
- * We need to get an extra ref for the skb (so it is not dropped), as
- * well as be careful not to queue more than one request (won't help
- * at all). If more than one request comes or there are errors, we
- * just drop the packets (see i2400m_hard_start_xmit()).
- */
-static
-int i2400m_net_wake_tx(struct i2400m *i2400m, struct net_device *net_dev,
- struct sk_buff *skb)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- unsigned long flags;
-
- d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
- if (net_ratelimit()) {
- d_printf(3, dev, "WAKE&NETTX: "
- "skb %p sending %d bytes to radio\n",
- skb, skb->len);
- d_dump(4, dev, skb->data, skb->len);
- }
- /* We hold a ref count for i2400m and skb, so when
- * stopping() the device, we need to cancel that work
- * and if pending, release those resources. */
- result = 0;
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- if (!i2400m->wake_tx_skb) {
- netif_stop_queue(net_dev);
- i2400m_get(i2400m);
- i2400m->wake_tx_skb = skb_get(skb); /* transfer ref count */
- i2400m_tx_prep_header(skb);
- result = schedule_work(&i2400m->wake_tx_ws);
- WARN_ON(result == 0);
- }
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- if (result == 0) {
- /* Yes, this happens even if we stopped the
- * queue -- blame the queue disciplines that
- * queue without looking -- I guess there is a reason
- * for that. */
- if (net_ratelimit())
- d_printf(1, dev, "NETTX: device exiting idle, "
- "dropping skb %p, queue running %d\n",
- skb, netif_queue_stopped(net_dev));
- result = -EBUSY;
- }
- d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
- return result;
-}
-
-
-/*
- * Transmit a packet to the base station on behalf of the network stack.
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * We need to pull the ethernet header and add the hardware header,
- * which is currently set to all zeroes and reserved.
- */
-static
-int i2400m_net_tx(struct i2400m *i2400m, struct net_device *net_dev,
- struct sk_buff *skb)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p net_dev %p skb %p)\n",
- i2400m, net_dev, skb);
- /* FIXME: check eth hdr, only IPv4 is routed by the device as of now */
- netif_trans_update(net_dev);
- i2400m_tx_prep_header(skb);
- d_printf(3, dev, "NETTX: skb %p sending %d bytes to radio\n",
- skb, skb->len);
- d_dump(4, dev, skb->data, skb->len);
- result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
- d_fnend(3, dev, "(i2400m %p net_dev %p skb %p) = %d\n",
- i2400m, net_dev, skb, result);
- return result;
-}
-
-
-/*
- * Transmit a packet to the base station on behalf of the network stack
- *
- *
- * Returns: NETDEV_TX_OK (always, even in case of error)
- *
- * In case of error, we just drop it. Reasons:
- *
- * - we add a hw header to each skb, and if the network stack
- * retries, we have no way to know if that skb has it or not.
- *
- * - network protocols have their own drop-recovery mechanisms
- *
- * - there is not much else we can do
- *
- * If the device is idle, we need to wake it up; that is an operation
- * that will sleep. See i2400m_net_wake_tx() for details.
- */
-static
-netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
- struct net_device *net_dev)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct device *dev = i2400m_dev(i2400m);
- int result = -1;
-
- d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
-
- if (skb_cow_head(skb, 0))
- goto drop;
-
- if (i2400m->state == I2400M_SS_IDLE)
- result = i2400m_net_wake_tx(i2400m, net_dev, skb);
- else
- result = i2400m_net_tx(i2400m, net_dev, skb);
- if (result < 0) {
-drop:
- net_dev->stats.tx_dropped++;
- } else {
- net_dev->stats.tx_packets++;
- net_dev->stats.tx_bytes += skb->len;
- }
- dev_kfree_skb(skb);
- d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
- return NETDEV_TX_OK;
-}
-
-
-static
-void i2400m_tx_timeout(struct net_device *net_dev, unsigned int txqueue)
-{
- /*
- * We might want to kick the device
- *
- * There is not much we can do though, as the device requires
- * that we send the data aggregated. By the time we receive
- * this, there might be data pending to be sent or not...
- */
- net_dev->stats.tx_errors++;
-}
-
-
-/*
- * Create a fake ethernet header
- *
- * For emulating an ethernet device, every received IP header has to
- * be prefixed with an ethernet header. Fake it with the given
- * protocol.
- */
-static
-void i2400m_rx_fake_eth_header(struct net_device *net_dev,
- void *_eth_hdr, __be16 protocol)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct ethhdr *eth_hdr = _eth_hdr;
-
- memcpy(eth_hdr->h_dest, net_dev->dev_addr, sizeof(eth_hdr->h_dest));
- memcpy(eth_hdr->h_source, i2400m->src_mac_addr,
- sizeof(eth_hdr->h_source));
- eth_hdr->h_proto = protocol;
-}
-
-
-/*
- * i2400m_net_rx - pass a network packet to the stack
- *
- * @i2400m: device instance
- * @skb_rx: the skb where the buffer pointed to by @buf is
- * @i: 1 if payload is the only one
- * @buf: pointer to the buffer containing the data
- * @len: buffer's length
- *
- * This is only used now for the v1.3 firmware. It will be deprecated
- * in >= 2.6.31.
- *
- * Note that due to firmware limitations, we don't have space to add
- * an ethernet header, so we need to copy each packet. Firmware
- * versions >= v1.4 fix this [see i2400m_net_erx()].
- *
- * We just clone the skb and set it up so that it's skb->data pointer
- * points to "buf" and it's length.
- *
- * Note that if the payload is the last (or the only one) in a
- * multi-payload message, we don't clone the SKB but just reuse it.
- *
- * This function is normally run from a thread context. However, we
- * still use netif_rx() instead of netif_receive_skb() as was
- * recommended in the mailing list. Reason is in some stress tests
- * when sending/receiving a lot of data we seem to hit a softlock in
- * the kernel's TCP implementation [aroudn tcp_delay_timer()]. Using
- * netif_rx() took care of the issue.
- *
- * This is, of course, still open to do more research on why running
- * with netif_receive_skb() hits this softlock. FIXME.
- *
- * FIXME: currently we don't do any efforts at distinguishing if what
- * we got was an IPv4 or IPv6 header, to setup the protocol field
- * correctly.
- */
-void i2400m_net_rx(struct i2400m *i2400m, struct sk_buff *skb_rx,
- unsigned i, const void *buf, int buf_len)
-{
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb;
-
- d_fnstart(2, dev, "(i2400m %p buf %p buf_len %d)\n",
- i2400m, buf, buf_len);
- if (i) {
- skb = skb_get(skb_rx);
- d_printf(2, dev, "RX: reusing first payload skb %p\n", skb);
- skb_pull(skb, buf - (void *) skb->data);
- skb_trim(skb, (void *) skb_end_pointer(skb) - buf);
- } else {
- /* Yes, this is bad -- a lot of overhead -- see
- * comments at the top of the file */
- skb = __netdev_alloc_skb(net_dev, buf_len, GFP_KERNEL);
- if (skb == NULL) {
- dev_err(dev, "NETRX: no memory to realloc skb\n");
- net_dev->stats.rx_dropped++;
- goto error_skb_realloc;
- }
- skb_put_data(skb, buf, buf_len);
- }
- i2400m_rx_fake_eth_header(i2400m->wimax_dev.net_dev,
- skb->data - ETH_HLEN,
- cpu_to_be16(ETH_P_IP));
- skb_set_mac_header(skb, -ETH_HLEN);
- skb->dev = i2400m->wimax_dev.net_dev;
- skb->protocol = htons(ETH_P_IP);
- net_dev->stats.rx_packets++;
- net_dev->stats.rx_bytes += buf_len;
- d_printf(3, dev, "NETRX: receiving %d bytes to network stack\n",
- buf_len);
- d_dump(4, dev, buf, buf_len);
- netif_rx_ni(skb); /* see notes in function header */
-error_skb_realloc:
- d_fnend(2, dev, "(i2400m %p buf %p buf_len %d) = void\n",
- i2400m, buf, buf_len);
-}
-
-
-/*
- * i2400m_net_erx - pass a network packet to the stack (extended version)
- *
- * @i2400m: device descriptor
- * @skb: the skb where the packet is - the skb should be set to point
- * at the IP packet; this function will add ethernet headers if
- * needed.
- * @cs: packet type
- *
- * This is only used now for firmware >= v1.4. Note it is quite
- * similar to i2400m_net_rx() (used only for v1.3 firmware).
- *
- * This function is normally run from a thread context. However, we
- * still use netif_rx() instead of netif_receive_skb() as was
- * recommended in the mailing list. Reason is in some stress tests
- * when sending/receiving a lot of data we seem to hit a softlock in
- * the kernel's TCP implementation [aroudn tcp_delay_timer()]. Using
- * netif_rx() took care of the issue.
- *
- * This is, of course, still open to do more research on why running
- * with netif_receive_skb() hits this softlock. FIXME.
- */
-void i2400m_net_erx(struct i2400m *i2400m, struct sk_buff *skb,
- enum i2400m_cs cs)
-{
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(2, dev, "(i2400m %p skb %p [%u] cs %d)\n",
- i2400m, skb, skb->len, cs);
- switch (cs) {
- case I2400M_CS_IPV4_0:
- case I2400M_CS_IPV4:
- i2400m_rx_fake_eth_header(i2400m->wimax_dev.net_dev,
- skb->data - ETH_HLEN,
- cpu_to_be16(ETH_P_IP));
- skb_set_mac_header(skb, -ETH_HLEN);
- skb->dev = i2400m->wimax_dev.net_dev;
- skb->protocol = htons(ETH_P_IP);
- net_dev->stats.rx_packets++;
- net_dev->stats.rx_bytes += skb->len;
- break;
- default:
- dev_err(dev, "ERX: BUG? CS type %u unsupported\n", cs);
- goto error;
-
- }
- d_printf(3, dev, "ERX: receiving %d bytes to the network stack\n",
- skb->len);
- d_dump(4, dev, skb->data, skb->len);
- netif_rx_ni(skb); /* see notes in function header */
-error:
- d_fnend(2, dev, "(i2400m %p skb %p [%u] cs %d) = void\n",
- i2400m, skb, skb->len, cs);
-}
-
-static const struct net_device_ops i2400m_netdev_ops = {
- .ndo_open = i2400m_open,
- .ndo_stop = i2400m_stop,
- .ndo_start_xmit = i2400m_hard_start_xmit,
- .ndo_tx_timeout = i2400m_tx_timeout,
-};
-
-static void i2400m_get_drvinfo(struct net_device *net_dev,
- struct ethtool_drvinfo *info)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
-
- strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
- strscpy(info->fw_version, i2400m->fw_name ? : "",
- sizeof(info->fw_version));
- if (net_dev->dev.parent)
- strscpy(info->bus_info, dev_name(net_dev->dev.parent),
- sizeof(info->bus_info));
-}
-
-static const struct ethtool_ops i2400m_ethtool_ops = {
- .get_drvinfo = i2400m_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-/*
- * i2400m_netdev_setup - Setup setup @net_dev's i2400m private data
- *
- * Called by alloc_netdev()
- */
-void i2400m_netdev_setup(struct net_device *net_dev)
-{
- d_fnstart(3, NULL, "(net_dev %p)\n", net_dev);
- ether_setup(net_dev);
- net_dev->mtu = I2400M_MAX_MTU;
- net_dev->min_mtu = 0;
- net_dev->max_mtu = I2400M_MAX_MTU;
- net_dev->tx_queue_len = I2400M_TX_QLEN;
- net_dev->features =
- NETIF_F_VLAN_CHALLENGED
- | NETIF_F_HIGHDMA;
- net_dev->flags =
- IFF_NOARP /* i2400m is apure IP device */
- & (~IFF_BROADCAST /* i2400m is P2P */
- & ~IFF_MULTICAST);
- net_dev->watchdog_timeo = I2400M_TX_TIMEOUT;
- net_dev->netdev_ops = &i2400m_netdev_ops;
- net_dev->ethtool_ops = &i2400m_ethtool_ops;
- d_fnend(3, NULL, "(net_dev %p) = void\n", net_dev);
-}
-EXPORT_SYMBOL_GPL(i2400m_netdev_setup);
-
diff --git a/drivers/staging/wimax/i2400m/op-rfkill.c b/drivers/staging/wimax/i2400m/op-rfkill.c
deleted file mode 100644
index 0f438ae6a8a2..000000000000
--- a/drivers/staging/wimax/i2400m/op-rfkill.c
+++ /dev/null
@@ -1,196 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Implement backend for the WiMAX stack rfkill support
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * The WiMAX kernel stack integrates into RF-Kill and keeps the
- * switches's status. We just need to:
- *
- * - report changes in the HW RF Kill switch [with
- * wimax_rfkill_{sw,hw}_report(), which happens when we detect those
- * indications coming through hardware reports]. We also do it on
- * initialization to let the stack know the initial HW state.
- *
- * - implement indications from the stack to change the SW RF Kill
- * switch (coming from sysfs, the wimax stack or user space).
- */
-#include "i2400m.h"
-#include "linux-wimax-i2400m.h"
-#include <linux/slab.h>
-
-
-
-#define D_SUBMODULE rfkill
-#include "debug-levels.h"
-
-/*
- * Return true if the i2400m radio is in the requested wimax_rf_state state
- *
- */
-static
-int i2400m_radio_is(struct i2400m *i2400m, enum wimax_rf_state state)
-{
- if (state == WIMAX_RF_OFF)
- return i2400m->state == I2400M_SS_RF_OFF
- || i2400m->state == I2400M_SS_RF_SHUTDOWN;
- else if (state == WIMAX_RF_ON)
- /* state == WIMAX_RF_ON */
- return i2400m->state != I2400M_SS_RF_OFF
- && i2400m->state != I2400M_SS_RF_SHUTDOWN;
- else {
- BUG();
- return -EINVAL; /* shut gcc warnings on certain arches */
- }
-}
-
-
-/*
- * WiMAX stack operation: implement SW RFKill toggling
- *
- * @wimax_dev: device descriptor
- * @skb: skb where the message has been received; skb->data is
- * expected to point to the message payload.
- * @genl_info: passed by the generic netlink layer
- *
- * Generic Netlink will call this function when a message is sent from
- * userspace to change the software RF-Kill switch status.
- *
- * This function will set the device's software RF-Kill switch state to
- * match what is requested.
- *
- * NOTE: the i2400m has a strict state machine; we can only set the
- * RF-Kill switch when it is on, the HW RF-Kill is on and the
- * device is initialized. So we ignore errors steaming from not
- * being in the right state (-EILSEQ).
- */
-int i2400m_op_rfkill_sw_toggle(struct wimax_dev *wimax_dev,
- enum wimax_rf_state state)
-{
- int result;
- struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *ack_skb;
- struct {
- struct i2400m_l3l4_hdr hdr;
- struct i2400m_tlv_rf_operation sw_rf;
- } __packed *cmd;
- char strerr[32];
-
- d_fnstart(4, dev, "(wimax_dev %p state %d)\n", wimax_dev, state);
-
- result = -ENOMEM;
- cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
- if (cmd == NULL)
- goto error_alloc;
- cmd->hdr.type = cpu_to_le16(I2400M_MT_CMD_RF_CONTROL);
- cmd->hdr.length = cpu_to_le16(sizeof(cmd->sw_rf));
- cmd->hdr.version = cpu_to_le16(I2400M_L3L4_VERSION);
- cmd->sw_rf.hdr.type = cpu_to_le16(I2400M_TLV_RF_OPERATION);
- cmd->sw_rf.hdr.length = cpu_to_le16(sizeof(cmd->sw_rf.status));
- switch (state) {
- case WIMAX_RF_OFF: /* RFKILL ON, radio OFF */
- cmd->sw_rf.status = cpu_to_le32(2);
- break;
- case WIMAX_RF_ON: /* RFKILL OFF, radio ON */
- cmd->sw_rf.status = cpu_to_le32(1);
- break;
- default:
- BUG();
- }
-
- ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
- result = PTR_ERR(ack_skb);
- if (IS_ERR(ack_skb)) {
- dev_err(dev, "Failed to issue 'RF Control' command: %d\n",
- result);
- goto error_msg_to_dev;
- }
- result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
- strerr, sizeof(strerr));
- if (result < 0) {
- dev_err(dev, "'RF Control' (0x%04x) command failed: %d - %s\n",
- I2400M_MT_CMD_RF_CONTROL, result, strerr);
- goto error_cmd;
- }
-
- /* Now we wait for the state to change to RADIO_OFF or RADIO_ON */
- result = wait_event_timeout(
- i2400m->state_wq, i2400m_radio_is(i2400m, state),
- 5 * HZ);
- if (result == 0)
- result = -ETIMEDOUT;
- if (result < 0)
- dev_err(dev, "Error waiting for device to toggle RF state: "
- "%d\n", result);
- result = 0;
-error_cmd:
- kfree_skb(ack_skb);
-error_msg_to_dev:
-error_alloc:
- d_fnend(4, dev, "(wimax_dev %p state %d) = %d\n",
- wimax_dev, state, result);
- kfree(cmd);
- return result;
-}
-
-
-/*
- * Inform the WiMAX stack of changes in the RF Kill switches reported
- * by the device
- *
- * @i2400m: device descriptor
- * @rfss: TLV for RF Switches status; already validated
- *
- * NOTE: the reports on RF switch status cannot be trusted
- * or used until the device is in a state of RADIO_OFF
- * or greater.
- */
-void i2400m_report_tlv_rf_switches_status(
- struct i2400m *i2400m,
- const struct i2400m_tlv_rf_switches_status *rfss)
-{
- struct device *dev = i2400m_dev(i2400m);
- enum i2400m_rf_switch_status hw, sw;
- enum wimax_st wimax_state;
-
- sw = rfss->sw_rf_switch;
- hw = rfss->hw_rf_switch;
-
- d_fnstart(3, dev, "(i2400m %p rfss %p [hw %u sw %u])\n",
- i2400m, rfss, hw, sw);
- /* We only process rw switch evens when the device has been
- * fully initialized */
- wimax_state = wimax_state_get(&i2400m->wimax_dev);
- if (wimax_state < WIMAX_ST_RADIO_OFF) {
- d_printf(3, dev, "ignoring RF switches report, state %u\n",
- wimax_state);
- goto out;
- }
- switch (sw) {
- case I2400M_RF_SWITCH_ON: /* RF Kill disabled (radio on) */
- wimax_report_rfkill_sw(&i2400m->wimax_dev, WIMAX_RF_ON);
- break;
- case I2400M_RF_SWITCH_OFF: /* RF Kill enabled (radio off) */
- wimax_report_rfkill_sw(&i2400m->wimax_dev, WIMAX_RF_OFF);
- break;
- default:
- dev_err(dev, "HW BUG? Unknown RF SW state 0x%x\n", sw);
- }
-
- switch (hw) {
- case I2400M_RF_SWITCH_ON: /* RF Kill disabled (radio on) */
- wimax_report_rfkill_hw(&i2400m->wimax_dev, WIMAX_RF_ON);
- break;
- case I2400M_RF_SWITCH_OFF: /* RF Kill enabled (radio off) */
- wimax_report_rfkill_hw(&i2400m->wimax_dev, WIMAX_RF_OFF);
- break;
- default:
- dev_err(dev, "HW BUG? Unknown RF HW state 0x%x\n", hw);
- }
-out:
- d_fnend(3, dev, "(i2400m %p rfss %p [hw %u sw %u]) = void\n",
- i2400m, rfss, hw, sw);
-}
diff --git a/drivers/staging/wimax/i2400m/rx.c b/drivers/staging/wimax/i2400m/rx.c
deleted file mode 100644
index 702a1e2fabcd..000000000000
--- a/drivers/staging/wimax/i2400m/rx.c
+++ /dev/null
@@ -1,1394 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Handle incoming traffic and deliver it to the control or data planes
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Use skb_clone(), break up processing in chunks
- * - Split transport/device specific
- * - Make buffer size dynamic to exert less memory pressure
- * - RX reorder support
- *
- * This handles the RX path.
- *
- * We receive an RX message from the bus-specific driver, which
- * contains one or more payloads that have potentially different
- * destinataries (data or control paths).
- *
- * So we just take that payload from the transport specific code in
- * the form of an skb, break it up in chunks (a cloned skb each in the
- * case of network packets) and pass it to netdev or to the
- * command/ack handler (and from there to the WiMAX stack).
- *
- * PROTOCOL FORMAT
- *
- * The format of the buffer is:
- *
- * HEADER (struct i2400m_msg_hdr)
- * PAYLOAD DESCRIPTOR 0 (struct i2400m_pld)
- * PAYLOAD DESCRIPTOR 1
- * ...
- * PAYLOAD DESCRIPTOR N
- * PAYLOAD 0 (raw bytes)
- * PAYLOAD 1
- * ...
- * PAYLOAD N
- *
- * See tx.c for a deeper description on alignment requirements and
- * other fun facts of it.
- *
- * DATA PACKETS
- *
- * In firmwares <= v1.3, data packets have no header for RX, but they
- * do for TX (currently unused).
- *
- * In firmware >= 1.4, RX packets have an extended header (16
- * bytes). This header conveys information for management of host
- * reordering of packets (the device offloads storage of the packets
- * for reordering to the host). Read below for more information.
- *
- * The header is used as dummy space to emulate an ethernet header and
- * thus be able to act as an ethernet device without having to reallocate.
- *
- * DATA RX REORDERING
- *
- * Starting in firmware v1.4, the device can deliver packets for
- * delivery with special reordering information; this allows it to
- * more effectively do packet management when some frames were lost in
- * the radio traffic.
- *
- * Thus, for RX packets that come out of order, the device gives the
- * driver enough information to queue them properly and then at some
- * point, the signal to deliver the whole (or part) of the queued
- * packets to the networking stack. There are 16 such queues.
- *
- * This only happens when a packet comes in with the "need reorder"
- * flag set in the RX header. When such bit is set, the following
- * operations might be indicated:
- *
- * - reset queue: send all queued packets to the OS
- *
- * - queue: queue a packet
- *
- * - update ws: update the queue's window start and deliver queued
- * packets that meet the criteria
- *
- * - queue & update ws: queue a packet, update the window start and
- * deliver queued packets that meet the criteria
- *
- * (delivery criteria: the packet's [normalized] sequence number is
- * lower than the new [normalized] window start).
- *
- * See the i2400m_roq_*() functions for details.
- *
- * ROADMAP
- *
- * i2400m_rx
- * i2400m_rx_msg_hdr_check
- * i2400m_rx_pl_descr_check
- * i2400m_rx_payload
- * i2400m_net_rx
- * i2400m_rx_edata
- * i2400m_net_erx
- * i2400m_roq_reset
- * i2400m_net_erx
- * i2400m_roq_queue
- * __i2400m_roq_queue
- * i2400m_roq_update_ws
- * __i2400m_roq_update_ws
- * i2400m_net_erx
- * i2400m_roq_queue_update_ws
- * __i2400m_roq_queue
- * __i2400m_roq_update_ws
- * i2400m_net_erx
- * i2400m_rx_ctl
- * i2400m_msg_size_check
- * i2400m_report_hook_work [in a workqueue]
- * i2400m_report_hook
- * wimax_msg_to_user
- * i2400m_rx_ctl_ack
- * wimax_msg_to_user_alloc
- * i2400m_rx_trace
- * i2400m_msg_size_check
- * wimax_msg
- */
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/if_arp.h>
-#include <linux/netdevice.h>
-#include <linux/workqueue.h>
-#include <linux/export.h>
-#include <linux/moduleparam.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE rx
-#include "debug-levels.h"
-
-static int i2400m_rx_reorder_disabled; /* 0 (rx reorder enabled) by default */
-module_param_named(rx_reorder_disabled, i2400m_rx_reorder_disabled, int, 0644);
-MODULE_PARM_DESC(rx_reorder_disabled,
- "If true, RX reordering will be disabled.");
-
-struct i2400m_report_hook_args {
- struct sk_buff *skb_rx;
- const struct i2400m_l3l4_hdr *l3l4_hdr;
- size_t size;
- struct list_head list_node;
-};
-
-
-/*
- * Execute i2400m_report_hook in a workqueue
- *
- * Goes over the list of queued reports in i2400m->rx_reports and
- * processes them.
- *
- * NOTE: refcounts on i2400m are not needed because we flush the
- * workqueue this runs on (i2400m->work_queue) before destroying
- * i2400m.
- */
-void i2400m_report_hook_work(struct work_struct *ws)
-{
- struct i2400m *i2400m = container_of(ws, struct i2400m, rx_report_ws);
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_report_hook_args *args, *args_next;
- LIST_HEAD(list);
- unsigned long flags;
-
- while (1) {
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- list_splice_init(&i2400m->rx_reports, &list);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- if (list_empty(&list))
- break;
- else
- d_printf(1, dev, "processing queued reports\n");
- list_for_each_entry_safe(args, args_next, &list, list_node) {
- d_printf(2, dev, "processing queued report %p\n", args);
- i2400m_report_hook(i2400m, args->l3l4_hdr, args->size);
- kfree_skb(args->skb_rx);
- list_del(&args->list_node);
- kfree(args);
- }
- }
-}
-
-
-/*
- * Flush the list of queued reports
- */
-static
-void i2400m_report_hook_flush(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_report_hook_args *args, *args_next;
- LIST_HEAD(list);
- unsigned long flags;
-
- d_printf(1, dev, "flushing queued reports\n");
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- list_splice_init(&i2400m->rx_reports, &list);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- list_for_each_entry_safe(args, args_next, &list, list_node) {
- d_printf(2, dev, "flushing queued report %p\n", args);
- kfree_skb(args->skb_rx);
- list_del(&args->list_node);
- kfree(args);
- }
-}
-
-
-/*
- * Queue a report for later processing
- *
- * @i2400m: device descriptor
- * @skb_rx: skb that contains the payload (for reference counting)
- * @l3l4_hdr: pointer to the control
- * @size: size of the message
- */
-static
-void i2400m_report_hook_queue(struct i2400m *i2400m, struct sk_buff *skb_rx,
- const void *l3l4_hdr, size_t size)
-{
- struct device *dev = i2400m_dev(i2400m);
- unsigned long flags;
- struct i2400m_report_hook_args *args;
-
- args = kzalloc(sizeof(*args), GFP_NOIO);
- if (args) {
- args->skb_rx = skb_get(skb_rx);
- args->l3l4_hdr = l3l4_hdr;
- args->size = size;
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- list_add_tail(&args->list_node, &i2400m->rx_reports);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- d_printf(2, dev, "queued report %p\n", args);
- rmb(); /* see i2400m->ready's documentation */
- if (likely(i2400m->ready)) /* only send if up */
- queue_work(i2400m->work_queue, &i2400m->rx_report_ws);
- } else {
- if (printk_ratelimit())
- dev_err(dev, "%s:%u: Can't allocate %zu B\n",
- __func__, __LINE__, sizeof(*args));
- }
-}
-
-
-/*
- * Process an ack to a command
- *
- * @i2400m: device descriptor
- * @payload: pointer to message
- * @size: size of the message
- *
- * Pass the acknodledgment (in an skb) to the thread that is waiting
- * for it in i2400m->msg_completion.
- *
- * We need to coordinate properly with the thread waiting for the
- * ack. Check if it is waiting or if it is gone. We loose the spinlock
- * to avoid allocating on atomic contexts (yeah, could use GFP_ATOMIC,
- * but this is not so speed critical).
- */
-static
-void i2400m_rx_ctl_ack(struct i2400m *i2400m,
- const void *payload, size_t size)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- unsigned long flags;
- struct sk_buff *ack_skb;
-
- /* Anyone waiting for an answer? */
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- if (i2400m->ack_skb != ERR_PTR(-EINPROGRESS)) {
- dev_err(dev, "Huh? reply to command with no waiters\n");
- goto error_no_waiter;
- }
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-
- ack_skb = wimax_msg_alloc(wimax_dev, NULL, payload, size, GFP_KERNEL);
-
- /* Check waiter didn't time out waiting for the answer... */
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- if (i2400m->ack_skb != ERR_PTR(-EINPROGRESS)) {
- d_printf(1, dev, "Huh? waiter for command reply cancelled\n");
- goto error_waiter_cancelled;
- }
- if (IS_ERR(ack_skb))
- dev_err(dev, "CMD/GET/SET ack: cannot allocate SKB\n");
- i2400m->ack_skb = ack_skb;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- complete(&i2400m->msg_completion);
- return;
-
-error_waiter_cancelled:
- if (!IS_ERR(ack_skb))
- kfree_skb(ack_skb);
-error_no_waiter:
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-}
-
-
-/*
- * Receive and process a control payload
- *
- * @i2400m: device descriptor
- * @skb_rx: skb that contains the payload (for reference counting)
- * @payload: pointer to message
- * @size: size of the message
- *
- * There are two types of control RX messages: reports (asynchronous,
- * like your every day interrupts) and 'acks' (reponses to a command,
- * get or set request).
- *
- * If it is a report, we run hooks on it (to extract information for
- * things we need to do in the driver) and then pass it over to the
- * WiMAX stack to send it to user space.
- *
- * NOTE: report processing is done in a workqueue specific to the
- * generic driver, to avoid deadlocks in the system.
- *
- * If it is not a report, it is an ack to a previously executed
- * command, set or get, so wake up whoever is waiting for it from
- * i2400m_msg_to_dev(). i2400m_rx_ctl_ack() takes care of that.
- *
- * Note that the sizes we pass to other functions from here are the
- * sizes of the _l3l4_hdr + payload, not full buffer sizes, as we have
- * verified in _msg_size_check() that they are congruent.
- *
- * For reports: We can't clone the original skb where the data is
- * because we need to send this up via netlink; netlink has to add
- * headers and we can't overwrite what's preceding the payload...as
- * it is another message. So we just dup them.
- */
-static
-void i2400m_rx_ctl(struct i2400m *i2400m, struct sk_buff *skb_rx,
- const void *payload, size_t size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_l3l4_hdr *l3l4_hdr = payload;
- unsigned msg_type;
-
- result = i2400m_msg_size_check(i2400m, l3l4_hdr, size);
- if (result < 0) {
- dev_err(dev, "HW BUG? device sent a bad message: %d\n",
- result);
- goto error_check;
- }
- msg_type = le16_to_cpu(l3l4_hdr->type);
- d_printf(1, dev, "%s 0x%04x: %zu bytes\n",
- msg_type & I2400M_MT_REPORT_MASK ? "REPORT" : "CMD/SET/GET",
- msg_type, size);
- d_dump(2, dev, l3l4_hdr, size);
- if (msg_type & I2400M_MT_REPORT_MASK) {
- /*
- * Process each report
- *
- * - has to be ran serialized as well
- *
- * - the handling might force the execution of
- * commands. That might cause reentrancy issues with
- * bus-specific subdrivers and workqueues, so the we
- * run it in a separate workqueue.
- *
- * - when the driver is not yet ready to handle them,
- * they are queued and at some point the queue is
- * restarted [NOTE: we can't queue SKBs directly, as
- * this might be a piece of a SKB, not the whole
- * thing, and this is cheaper than cloning the
- * SKB].
- *
- * Note we don't do refcounting for the device
- * structure; this is because before destroying
- * 'i2400m', we make sure to flush the
- * i2400m->work_queue, so there are no issues.
- */
- i2400m_report_hook_queue(i2400m, skb_rx, l3l4_hdr, size);
- if (unlikely(i2400m->trace_msg_from_user))
- wimax_msg(&i2400m->wimax_dev, "echo",
- l3l4_hdr, size, GFP_KERNEL);
- result = wimax_msg(&i2400m->wimax_dev, NULL, l3l4_hdr, size,
- GFP_KERNEL);
- if (result < 0)
- dev_err(dev, "error sending report to userspace: %d\n",
- result);
- } else /* an ack to a CMD, GET or SET */
- i2400m_rx_ctl_ack(i2400m, payload, size);
-error_check:
- return;
-}
-
-
-/*
- * Receive and send up a trace
- *
- * @i2400m: device descriptor
- * @skb_rx: skb that contains the trace (for reference counting)
- * @payload: pointer to trace message inside the skb
- * @size: size of the message
- *
- * THe i2400m might produce trace information (diagnostics) and we
- * send them through a different kernel-to-user pipe (to avoid
- * clogging it).
- *
- * As in i2400m_rx_ctl(), we can't clone the original skb where the
- * data is because we need to send this up via netlink; netlink has to
- * add headers and we can't overwrite what's preceding the
- * payload...as it is another message. So we just dup them.
- */
-static
-void i2400m_rx_trace(struct i2400m *i2400m,
- const void *payload, size_t size)
-{
- int result;
- struct device *dev = i2400m_dev(i2400m);
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- const struct i2400m_l3l4_hdr *l3l4_hdr = payload;
- unsigned msg_type;
-
- result = i2400m_msg_size_check(i2400m, l3l4_hdr, size);
- if (result < 0) {
- dev_err(dev, "HW BUG? device sent a bad trace message: %d\n",
- result);
- goto error_check;
- }
- msg_type = le16_to_cpu(l3l4_hdr->type);
- d_printf(1, dev, "Trace %s 0x%04x: %zu bytes\n",
- msg_type & I2400M_MT_REPORT_MASK ? "REPORT" : "CMD/SET/GET",
- msg_type, size);
- d_dump(2, dev, l3l4_hdr, size);
- result = wimax_msg(wimax_dev, "trace", l3l4_hdr, size, GFP_KERNEL);
- if (result < 0)
- dev_err(dev, "error sending trace to userspace: %d\n",
- result);
-error_check:
- return;
-}
-
-
-/*
- * Reorder queue data stored on skb->cb while the skb is queued in the
- * reorder queues.
- */
-struct i2400m_roq_data {
- unsigned sn; /* Serial number for the skb */
- enum i2400m_cs cs; /* packet type for the skb */
-};
-
-
-/*
- * ReOrder Queue
- *
- * @ws: Window Start; sequence number where the current window start
- * is for this queue
- * @queue: the skb queue itself
- * @log: circular ring buffer used to log information about the
- * reorder process in this queue that can be displayed in case of
- * error to help diagnose it.
- *
- * This is the head for a list of skbs. In the skb->cb member of the
- * skb when queued here contains a 'struct i2400m_roq_data' were we
- * store the sequence number (sn) and the cs (packet type) coming from
- * the RX payload header from the device.
- */
-struct i2400m_roq {
- unsigned ws;
- struct sk_buff_head queue;
- struct i2400m_roq_log *log;
-};
-
-
-static
-void __i2400m_roq_init(struct i2400m_roq *roq)
-{
- roq->ws = 0;
- skb_queue_head_init(&roq->queue);
-}
-
-
-static
-unsigned __i2400m_roq_index(struct i2400m *i2400m, struct i2400m_roq *roq)
-{
- return ((unsigned long) roq - (unsigned long) i2400m->rx_roq)
- / sizeof(*roq);
-}
-
-
-/*
- * Normalize a sequence number based on the queue's window start
- *
- * nsn = (sn - ws) % 2048
- *
- * Note that if @sn < @roq->ws, we still need a positive number; %'s
- * sign is implementation specific, so we normalize it by adding 2048
- * to bring it to be positive.
- */
-static
-unsigned __i2400m_roq_nsn(struct i2400m_roq *roq, unsigned sn)
-{
- int r;
- r = ((int) sn - (int) roq->ws) % 2048;
- if (r < 0)
- r += 2048;
- return r;
-}
-
-
-/*
- * Circular buffer to keep the last N reorder operations
- *
- * In case something fails, dumb then to try to come up with what
- * happened.
- */
-enum {
- I2400M_ROQ_LOG_LENGTH = 32,
-};
-
-struct i2400m_roq_log {
- struct i2400m_roq_log_entry {
- enum i2400m_ro_type type;
- unsigned ws, count, sn, nsn, new_ws;
- } entry[I2400M_ROQ_LOG_LENGTH];
- unsigned in, out;
-};
-
-
-/* Print a log entry */
-static
-void i2400m_roq_log_entry_print(struct i2400m *i2400m, unsigned index,
- unsigned e_index,
- struct i2400m_roq_log_entry *e)
-{
- struct device *dev = i2400m_dev(i2400m);
-
- switch(e->type) {
- case I2400M_RO_TYPE_RESET:
- dev_err(dev, "q#%d reset ws %u cnt %u sn %u/%u"
- " - new nws %u\n",
- index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
- break;
- case I2400M_RO_TYPE_PACKET:
- dev_err(dev, "q#%d queue ws %u cnt %u sn %u/%u\n",
- index, e->ws, e->count, e->sn, e->nsn);
- break;
- case I2400M_RO_TYPE_WS:
- dev_err(dev, "q#%d update_ws ws %u cnt %u sn %u/%u"
- " - new nws %u\n",
- index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
- break;
- case I2400M_RO_TYPE_PACKET_WS:
- dev_err(dev, "q#%d queue_update_ws ws %u cnt %u sn %u/%u"
- " - new nws %u\n",
- index, e->ws, e->count, e->sn, e->nsn, e->new_ws);
- break;
- default:
- dev_err(dev, "q#%d BUG? entry %u - unknown type %u\n",
- index, e_index, e->type);
- break;
- }
-}
-
-
-static
-void i2400m_roq_log_add(struct i2400m *i2400m,
- struct i2400m_roq *roq, enum i2400m_ro_type type,
- unsigned ws, unsigned count, unsigned sn,
- unsigned nsn, unsigned new_ws)
-{
- struct i2400m_roq_log_entry *e;
- unsigned cnt_idx;
- int index = __i2400m_roq_index(i2400m, roq);
-
- /* if we run out of space, we eat from the end */
- if (roq->log->in - roq->log->out == I2400M_ROQ_LOG_LENGTH)
- roq->log->out++;
- cnt_idx = roq->log->in++ % I2400M_ROQ_LOG_LENGTH;
- e = &roq->log->entry[cnt_idx];
-
- e->type = type;
- e->ws = ws;
- e->count = count;
- e->sn = sn;
- e->nsn = nsn;
- e->new_ws = new_ws;
-
- if (d_test(1))
- i2400m_roq_log_entry_print(i2400m, index, cnt_idx, e);
-}
-
-
-/* Dump all the entries in the FIFO and reinitialize it */
-static
-void i2400m_roq_log_dump(struct i2400m *i2400m, struct i2400m_roq *roq)
-{
- unsigned cnt, cnt_idx;
- struct i2400m_roq_log_entry *e;
- int index = __i2400m_roq_index(i2400m, roq);
-
- BUG_ON(roq->log->out > roq->log->in);
- for (cnt = roq->log->out; cnt < roq->log->in; cnt++) {
- cnt_idx = cnt % I2400M_ROQ_LOG_LENGTH;
- e = &roq->log->entry[cnt_idx];
- i2400m_roq_log_entry_print(i2400m, index, cnt_idx, e);
- memset(e, 0, sizeof(*e));
- }
- roq->log->in = roq->log->out = 0;
-}
-
-
-/*
- * Backbone for the queuing of an skb (by normalized sequence number)
- *
- * @i2400m: device descriptor
- * @roq: reorder queue where to add
- * @skb: the skb to add
- * @sn: the sequence number of the skb
- * @nsn: the normalized sequence number of the skb (pre-computed by the
- * caller from the @sn and @roq->ws).
- *
- * We try first a couple of quick cases:
- *
- * - the queue is empty
- * - the skb would be appended to the queue
- *
- * These will be the most common operations.
- *
- * If these fail, then we have to do a sorted insertion in the queue,
- * which is the slowest path.
- *
- * We don't have to acquire a reference count as we are going to own it.
- */
-static
-void __i2400m_roq_queue(struct i2400m *i2400m, struct i2400m_roq *roq,
- struct sk_buff *skb, unsigned sn, unsigned nsn)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb_itr;
- struct i2400m_roq_data *roq_data_itr, *roq_data;
- unsigned nsn_itr;
-
- d_fnstart(4, dev, "(i2400m %p roq %p skb %p sn %u nsn %u)\n",
- i2400m, roq, skb, sn, nsn);
-
- roq_data = (struct i2400m_roq_data *) &skb->cb;
- BUILD_BUG_ON(sizeof(*roq_data) > sizeof(skb->cb));
- roq_data->sn = sn;
- d_printf(3, dev, "ERX: roq %p [ws %u] nsn %d sn %u\n",
- roq, roq->ws, nsn, roq_data->sn);
-
- /* Queues will be empty on not-so-bad environments, so try
- * that first */
- if (skb_queue_empty(&roq->queue)) {
- d_printf(2, dev, "ERX: roq %p - first one\n", roq);
- __skb_queue_head(&roq->queue, skb);
- goto out;
- }
- /* Now try append, as most of the operations will be that */
- skb_itr = skb_peek_tail(&roq->queue);
- roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
- nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
- /* NSN bounds assumed correct (checked when it was queued) */
- if (nsn >= nsn_itr) {
- d_printf(2, dev, "ERX: roq %p - appended after %p (nsn %d sn %u)\n",
- roq, skb_itr, nsn_itr, roq_data_itr->sn);
- __skb_queue_tail(&roq->queue, skb);
- goto out;
- }
- /* None of the fast paths option worked. Iterate to find the
- * right spot where to insert the packet; we know the queue is
- * not empty, so we are not the first ones; we also know we
- * are not going to be the last ones. The list is sorted, so
- * we have to insert before the the first guy with an nsn_itr
- * greater that our nsn. */
- skb_queue_walk(&roq->queue, skb_itr) {
- roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
- nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
- /* NSN bounds assumed correct (checked when it was queued) */
- if (nsn_itr > nsn) {
- d_printf(2, dev, "ERX: roq %p - queued before %p "
- "(nsn %d sn %u)\n", roq, skb_itr, nsn_itr,
- roq_data_itr->sn);
- __skb_queue_before(&roq->queue, skb_itr, skb);
- goto out;
- }
- }
- /* If we get here, that is VERY bad -- print info to help
- * diagnose and crash it */
- dev_err(dev, "SW BUG? failed to insert packet\n");
- dev_err(dev, "ERX: roq %p [ws %u] skb %p nsn %d sn %u\n",
- roq, roq->ws, skb, nsn, roq_data->sn);
- skb_queue_walk(&roq->queue, skb_itr) {
- roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
- nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
- /* NSN bounds assumed correct (checked when it was queued) */
- dev_err(dev, "ERX: roq %p skb_itr %p nsn %d sn %u\n",
- roq, skb_itr, nsn_itr, roq_data_itr->sn);
- }
- BUG();
-out:
- d_fnend(4, dev, "(i2400m %p roq %p skb %p sn %u nsn %d) = void\n",
- i2400m, roq, skb, sn, nsn);
-}
-
-
-/*
- * Backbone for the update window start operation
- *
- * @i2400m: device descriptor
- * @roq: Reorder queue
- * @sn: New sequence number
- *
- * Updates the window start of a queue; when doing so, it must deliver
- * to the networking stack all the queued skb's whose normalized
- * sequence number is lower than the new normalized window start.
- */
-static
-unsigned __i2400m_roq_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
- unsigned sn)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb_itr, *tmp_itr;
- struct i2400m_roq_data *roq_data_itr;
- unsigned new_nws, nsn_itr;
-
- new_nws = __i2400m_roq_nsn(roq, sn);
- /*
- * For type 2(update_window_start) rx messages, there is no
- * need to check if the normalized sequence number is greater 1023.
- * Simply insert and deliver all packets to the host up to the
- * window start.
- */
- skb_queue_walk_safe(&roq->queue, skb_itr, tmp_itr) {
- roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
- nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
- /* NSN bounds assumed correct (checked when it was queued) */
- if (nsn_itr < new_nws) {
- d_printf(2, dev, "ERX: roq %p - release skb %p "
- "(nsn %u/%u new nws %u)\n",
- roq, skb_itr, nsn_itr, roq_data_itr->sn,
- new_nws);
- __skb_unlink(skb_itr, &roq->queue);
- i2400m_net_erx(i2400m, skb_itr, roq_data_itr->cs);
- }
- else
- break; /* rest of packets all nsn_itr > nws */
- }
- roq->ws = sn;
- return new_nws;
-}
-
-
-/*
- * Reset a queue
- *
- * @i2400m: device descriptor
- * @cin: Queue Index
- *
- * Deliver all the packets and reset the window-start to zero. Name is
- * kind of misleading.
- */
-static
-void i2400m_roq_reset(struct i2400m *i2400m, struct i2400m_roq *roq)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct sk_buff *skb_itr, *tmp_itr;
- struct i2400m_roq_data *roq_data_itr;
-
- d_fnstart(2, dev, "(i2400m %p roq %p)\n", i2400m, roq);
- i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_RESET,
- roq->ws, skb_queue_len(&roq->queue),
- ~0, ~0, 0);
- skb_queue_walk_safe(&roq->queue, skb_itr, tmp_itr) {
- roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
- d_printf(2, dev, "ERX: roq %p - release skb %p (sn %u)\n",
- roq, skb_itr, roq_data_itr->sn);
- __skb_unlink(skb_itr, &roq->queue);
- i2400m_net_erx(i2400m, skb_itr, roq_data_itr->cs);
- }
- roq->ws = 0;
- d_fnend(2, dev, "(i2400m %p roq %p) = void\n", i2400m, roq);
-}
-
-
-/*
- * Queue a packet
- *
- * @i2400m: device descriptor
- * @cin: Queue Index
- * @skb: containing the packet data
- * @fbn: First block number of the packet in @skb
- * @lbn: Last block number of the packet in @skb
- *
- * The hardware is asking the driver to queue a packet for later
- * delivery to the networking stack.
- */
-static
-void i2400m_roq_queue(struct i2400m *i2400m, struct i2400m_roq *roq,
- struct sk_buff *skb, unsigned lbn)
-{
- struct device *dev = i2400m_dev(i2400m);
- unsigned nsn, len;
-
- d_fnstart(2, dev, "(i2400m %p roq %p skb %p lbn %u) = void\n",
- i2400m, roq, skb, lbn);
- len = skb_queue_len(&roq->queue);
- nsn = __i2400m_roq_nsn(roq, lbn);
- if (unlikely(nsn >= 1024)) {
- dev_err(dev, "SW BUG? queue nsn %d (lbn %u ws %u)\n",
- nsn, lbn, roq->ws);
- i2400m_roq_log_dump(i2400m, roq);
- i2400m_reset(i2400m, I2400M_RT_WARM);
- } else {
- __i2400m_roq_queue(i2400m, roq, skb, lbn, nsn);
- i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET,
- roq->ws, len, lbn, nsn, ~0);
- }
- d_fnend(2, dev, "(i2400m %p roq %p skb %p lbn %u) = void\n",
- i2400m, roq, skb, lbn);
-}
-
-
-/*
- * Update the window start in a reorder queue and deliver all skbs
- * with a lower window start
- *
- * @i2400m: device descriptor
- * @roq: Reorder queue
- * @sn: New sequence number
- */
-static
-void i2400m_roq_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
- unsigned sn)
-{
- struct device *dev = i2400m_dev(i2400m);
- unsigned old_ws, nsn, len;
-
- d_fnstart(2, dev, "(i2400m %p roq %p sn %u)\n", i2400m, roq, sn);
- old_ws = roq->ws;
- len = skb_queue_len(&roq->queue);
- nsn = __i2400m_roq_update_ws(i2400m, roq, sn);
- i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_WS,
- old_ws, len, sn, nsn, roq->ws);
- d_fnstart(2, dev, "(i2400m %p roq %p sn %u) = void\n", i2400m, roq, sn);
-}
-
-
-/*
- * Queue a packet and update the window start
- *
- * @i2400m: device descriptor
- * @cin: Queue Index
- * @skb: containing the packet data
- * @fbn: First block number of the packet in @skb
- * @sn: Last block number of the packet in @skb
- *
- * Note that unlike i2400m_roq_update_ws(), which sets the new window
- * start to @sn, in here we'll set it to @sn + 1.
- */
-static
-void i2400m_roq_queue_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
- struct sk_buff *skb, unsigned sn)
-{
- struct device *dev = i2400m_dev(i2400m);
- unsigned nsn, old_ws, len;
-
- d_fnstart(2, dev, "(i2400m %p roq %p skb %p sn %u)\n",
- i2400m, roq, skb, sn);
- len = skb_queue_len(&roq->queue);
- nsn = __i2400m_roq_nsn(roq, sn);
- /*
- * For type 3(queue_update_window_start) rx messages, there is no
- * need to check if the normalized sequence number is greater 1023.
- * Simply insert and deliver all packets to the host up to the
- * window start.
- */
- old_ws = roq->ws;
- /* If the queue is empty, don't bother as we'd queue
- * it and immediately unqueue it -- just deliver it.
- */
- if (len == 0) {
- struct i2400m_roq_data *roq_data;
- roq_data = (struct i2400m_roq_data *) &skb->cb;
- i2400m_net_erx(i2400m, skb, roq_data->cs);
- } else
- __i2400m_roq_queue(i2400m, roq, skb, sn, nsn);
-
- __i2400m_roq_update_ws(i2400m, roq, sn + 1);
- i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET_WS,
- old_ws, len, sn, nsn, roq->ws);
-
- d_fnend(2, dev, "(i2400m %p roq %p skb %p sn %u) = void\n",
- i2400m, roq, skb, sn);
-}
-
-
-/*
- * This routine destroys the memory allocated for rx_roq, when no
- * other thread is accessing it. Access to rx_roq is refcounted by
- * rx_roq_refcount, hence memory allocated must be destroyed when
- * rx_roq_refcount becomes zero. This routine gets executed when
- * rx_roq_refcount becomes zero.
- */
-static void i2400m_rx_roq_destroy(struct kref *ref)
-{
- unsigned itr;
- struct i2400m *i2400m
- = container_of(ref, struct i2400m, rx_roq_refcount);
- for (itr = 0; itr < I2400M_RO_CIN + 1; itr++)
- __skb_queue_purge(&i2400m->rx_roq[itr].queue);
- kfree(i2400m->rx_roq[0].log);
- kfree(i2400m->rx_roq);
- i2400m->rx_roq = NULL;
-}
-
-/*
- * Receive and send up an extended data packet
- *
- * @i2400m: device descriptor
- * @skb_rx: skb that contains the extended data packet
- * @single_last: 1 if the payload is the only one or the last one of
- * the skb.
- * @payload: pointer to the packet's data inside the skb
- * @size: size of the payload
- *
- * Starting in v1.4 of the i2400m's firmware, the device can send data
- * packets to the host in an extended format that; this incudes a 16
- * byte header (struct i2400m_pl_edata_hdr). Using this header's space
- * we can fake ethernet headers for ethernet device emulation without
- * having to copy packets around.
- *
- * This function handles said path.
- *
- *
- * Receive and send up an extended data packet that requires no reordering
- *
- * @i2400m: device descriptor
- * @skb_rx: skb that contains the extended data packet
- * @single_last: 1 if the payload is the only one or the last one of
- * the skb.
- * @payload: pointer to the packet's data (past the actual extended
- * data payload header).
- * @size: size of the payload
- *
- * Pass over to the networking stack a data packet that might have
- * reordering requirements.
- *
- * This needs to the decide if the skb in which the packet is
- * contained can be reused or if it needs to be cloned. Then it has to
- * be trimmed in the edges so that the beginning is the space for eth
- * header and then pass it to i2400m_net_erx() for the stack
- *
- * Assumes the caller has verified the sanity of the payload (size,
- * etc) already.
- */
-static
-void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
- unsigned single_last, const void *payload, size_t size)
-{
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_pl_edata_hdr *hdr = payload;
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct sk_buff *skb;
- enum i2400m_cs cs;
- u32 reorder;
- unsigned ro_needed, ro_type, ro_cin, ro_sn;
- struct i2400m_roq *roq;
- struct i2400m_roq_data *roq_data;
- unsigned long flags;
-
- BUILD_BUG_ON(ETH_HLEN > sizeof(*hdr));
-
- d_fnstart(2, dev, "(i2400m %p skb_rx %p single %u payload %p "
- "size %zu)\n", i2400m, skb_rx, single_last, payload, size);
- if (size < sizeof(*hdr)) {
- dev_err(dev, "ERX: HW BUG? message with short header (%zu "
- "vs %zu bytes expected)\n", size, sizeof(*hdr));
- goto error;
- }
-
- if (single_last) {
- skb = skb_get(skb_rx);
- d_printf(3, dev, "ERX: skb %p reusing\n", skb);
- } else {
- skb = skb_clone(skb_rx, GFP_KERNEL);
- if (skb == NULL) {
- dev_err(dev, "ERX: no memory to clone skb\n");
- net_dev->stats.rx_dropped++;
- goto error_skb_clone;
- }
- d_printf(3, dev, "ERX: skb %p cloned from %p\n", skb, skb_rx);
- }
- /* now we have to pull and trim so that the skb points to the
- * beginning of the IP packet; the netdev part will add the
- * ethernet header as needed - we know there is enough space
- * because we checked in i2400m_rx_edata(). */
- skb_pull(skb, payload + sizeof(*hdr) - (void *) skb->data);
- skb_trim(skb, (void *) skb_end_pointer(skb) - payload - sizeof(*hdr));
-
- reorder = le32_to_cpu(hdr->reorder);
- ro_needed = reorder & I2400M_RO_NEEDED;
- cs = hdr->cs;
- if (ro_needed) {
- ro_type = (reorder >> I2400M_RO_TYPE_SHIFT) & I2400M_RO_TYPE;
- ro_cin = (reorder >> I2400M_RO_CIN_SHIFT) & I2400M_RO_CIN;
- ro_sn = (reorder >> I2400M_RO_SN_SHIFT) & I2400M_RO_SN;
-
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- if (i2400m->rx_roq == NULL) {
- kfree_skb(skb); /* rx_roq is already destroyed */
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- goto error;
- }
- roq = &i2400m->rx_roq[ro_cin];
- kref_get(&i2400m->rx_roq_refcount);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-
- roq_data = (struct i2400m_roq_data *) &skb->cb;
- roq_data->sn = ro_sn;
- roq_data->cs = cs;
- d_printf(2, dev, "ERX: reorder needed: "
- "type %u cin %u [ws %u] sn %u/%u len %zuB\n",
- ro_type, ro_cin, roq->ws, ro_sn,
- __i2400m_roq_nsn(roq, ro_sn), size);
- d_dump(2, dev, payload, size);
- switch(ro_type) {
- case I2400M_RO_TYPE_RESET:
- i2400m_roq_reset(i2400m, roq);
- kfree_skb(skb); /* no data here */
- break;
- case I2400M_RO_TYPE_PACKET:
- i2400m_roq_queue(i2400m, roq, skb, ro_sn);
- break;
- case I2400M_RO_TYPE_WS:
- i2400m_roq_update_ws(i2400m, roq, ro_sn);
- kfree_skb(skb); /* no data here */
- break;
- case I2400M_RO_TYPE_PACKET_WS:
- i2400m_roq_queue_update_ws(i2400m, roq, skb, ro_sn);
- break;
- default:
- dev_err(dev, "HW BUG? unknown reorder type %u\n", ro_type);
- }
-
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- kref_put(&i2400m->rx_roq_refcount, i2400m_rx_roq_destroy);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- }
- else
- i2400m_net_erx(i2400m, skb, cs);
-error_skb_clone:
-error:
- d_fnend(2, dev, "(i2400m %p skb_rx %p single %u payload %p "
- "size %zu) = void\n", i2400m, skb_rx, single_last, payload, size);
-}
-
-
-/*
- * Act on a received payload
- *
- * @i2400m: device instance
- * @skb_rx: skb where the transaction was received
- * @single_last: 1 this is the only payload or the last one (so the
- * skb can be reused instead of cloned).
- * @pld: payload descriptor
- * @payload: payload data
- *
- * Upon reception of a payload, look at its guts in the payload
- * descriptor and decide what to do with it. If it is a single payload
- * skb or if the last skb is a data packet, the skb will be referenced
- * and modified (so it doesn't have to be cloned).
- */
-static
-void i2400m_rx_payload(struct i2400m *i2400m, struct sk_buff *skb_rx,
- unsigned single_last, const struct i2400m_pld *pld,
- const void *payload)
-{
- struct device *dev = i2400m_dev(i2400m);
- size_t pl_size = i2400m_pld_size(pld);
- enum i2400m_pt pl_type = i2400m_pld_type(pld);
-
- d_printf(7, dev, "RX: received payload type %u, %zu bytes\n",
- pl_type, pl_size);
- d_dump(8, dev, payload, pl_size);
-
- switch (pl_type) {
- case I2400M_PT_DATA:
- d_printf(3, dev, "RX: data payload %zu bytes\n", pl_size);
- i2400m_net_rx(i2400m, skb_rx, single_last, payload, pl_size);
- break;
- case I2400M_PT_CTRL:
- i2400m_rx_ctl(i2400m, skb_rx, payload, pl_size);
- break;
- case I2400M_PT_TRACE:
- i2400m_rx_trace(i2400m, payload, pl_size);
- break;
- case I2400M_PT_EDATA:
- d_printf(3, dev, "ERX: data payload %zu bytes\n", pl_size);
- i2400m_rx_edata(i2400m, skb_rx, single_last, payload, pl_size);
- break;
- default: /* Anything else shouldn't come to the host */
- if (printk_ratelimit())
- dev_err(dev, "RX: HW BUG? unexpected payload type %u\n",
- pl_type);
- }
-}
-
-
-/*
- * Check a received transaction's message header
- *
- * @i2400m: device descriptor
- * @msg_hdr: message header
- * @buf_size: size of the received buffer
- *
- * Check that the declarations done by a RX buffer message header are
- * sane and consistent with the amount of data that was received.
- */
-static
-int i2400m_rx_msg_hdr_check(struct i2400m *i2400m,
- const struct i2400m_msg_hdr *msg_hdr,
- size_t buf_size)
-{
- int result = -EIO;
- struct device *dev = i2400m_dev(i2400m);
- if (buf_size < sizeof(*msg_hdr)) {
- dev_err(dev, "RX: HW BUG? message with short header (%zu "
- "vs %zu bytes expected)\n", buf_size, sizeof(*msg_hdr));
- goto error;
- }
- if (msg_hdr->barker != cpu_to_le32(I2400M_D2H_MSG_BARKER)) {
- dev_err(dev, "RX: HW BUG? message received with unknown "
- "barker 0x%08x (buf_size %zu bytes)\n",
- le32_to_cpu(msg_hdr->barker), buf_size);
- goto error;
- }
- if (msg_hdr->num_pls == 0) {
- dev_err(dev, "RX: HW BUG? zero payload packets in message\n");
- goto error;
- }
- if (le16_to_cpu(msg_hdr->num_pls) > I2400M_MAX_PLS_IN_MSG) {
- dev_err(dev, "RX: HW BUG? message contains more payload "
- "than maximum; ignoring.\n");
- goto error;
- }
- result = 0;
-error:
- return result;
-}
-
-
-/*
- * Check a payload descriptor against the received data
- *
- * @i2400m: device descriptor
- * @pld: payload descriptor
- * @pl_itr: offset (in bytes) in the received buffer the payload is
- * located
- * @buf_size: size of the received buffer
- *
- * Given a payload descriptor (part of a RX buffer), check it is sane
- * and that the data it declares fits in the buffer.
- */
-static
-int i2400m_rx_pl_descr_check(struct i2400m *i2400m,
- const struct i2400m_pld *pld,
- size_t pl_itr, size_t buf_size)
-{
- int result = -EIO;
- struct device *dev = i2400m_dev(i2400m);
- size_t pl_size = i2400m_pld_size(pld);
- enum i2400m_pt pl_type = i2400m_pld_type(pld);
-
- if (pl_size > i2400m->bus_pl_size_max) {
- dev_err(dev, "RX: HW BUG? payload @%zu: size %zu is "
- "bigger than maximum %zu; ignoring message\n",
- pl_itr, pl_size, i2400m->bus_pl_size_max);
- goto error;
- }
- if (pl_itr + pl_size > buf_size) { /* enough? */
- dev_err(dev, "RX: HW BUG? payload @%zu: size %zu "
- "goes beyond the received buffer "
- "size (%zu bytes); ignoring message\n",
- pl_itr, pl_size, buf_size);
- goto error;
- }
- if (pl_type >= I2400M_PT_ILLEGAL) {
- dev_err(dev, "RX: HW BUG? illegal payload type %u; "
- "ignoring message\n", pl_type);
- goto error;
- }
- result = 0;
-error:
- return result;
-}
-
-
-/**
- * i2400m_rx - Receive a buffer of data from the device
- *
- * @i2400m: device descriptor
- * @skb: skbuff where the data has been received
- *
- * Parse in a buffer of data that contains an RX message sent from the
- * device. See the file header for the format. Run all checks on the
- * buffer header, then run over each payload's descriptors, verify
- * their consistency and act on each payload's contents. If
- * everything is successful, update the device's statistics.
- *
- * Note: You need to set the skb to contain only the length of the
- * received buffer; for that, use skb_trim(skb, RECEIVED_SIZE).
- *
- * Returns:
- *
- * 0 if ok, < 0 errno on error
- *
- * If ok, this function owns now the skb and the caller DOESN'T have
- * to run kfree_skb() on it. However, on error, the caller still owns
- * the skb and it is responsible for releasing it.
- */
-int i2400m_rx(struct i2400m *i2400m, struct sk_buff *skb)
-{
- int i, result;
- struct device *dev = i2400m_dev(i2400m);
- const struct i2400m_msg_hdr *msg_hdr;
- size_t pl_itr, pl_size;
- unsigned long flags;
- unsigned num_pls, single_last, skb_len;
-
- skb_len = skb->len;
- d_fnstart(4, dev, "(i2400m %p skb %p [size %u])\n",
- i2400m, skb, skb_len);
- msg_hdr = (void *) skb->data;
- result = i2400m_rx_msg_hdr_check(i2400m, msg_hdr, skb_len);
- if (result < 0)
- goto error_msg_hdr_check;
- result = -EIO;
- num_pls = le16_to_cpu(msg_hdr->num_pls);
- /* Check payload descriptor(s) */
- pl_itr = struct_size(msg_hdr, pld, num_pls);
- pl_itr = ALIGN(pl_itr, I2400M_PL_ALIGN);
- if (pl_itr > skb_len) { /* got all the payload descriptors? */
- dev_err(dev, "RX: HW BUG? message too short (%u bytes) for "
- "%u payload descriptors (%zu each, total %zu)\n",
- skb_len, num_pls, sizeof(msg_hdr->pld[0]), pl_itr);
- goto error_pl_descr_short;
- }
- /* Walk each payload payload--check we really got it */
- for (i = 0; i < num_pls; i++) {
- /* work around old gcc warnings */
- pl_size = i2400m_pld_size(&msg_hdr->pld[i]);
- result = i2400m_rx_pl_descr_check(i2400m, &msg_hdr->pld[i],
- pl_itr, skb_len);
- if (result < 0)
- goto error_pl_descr_check;
- single_last = num_pls == 1 || i == num_pls - 1;
- i2400m_rx_payload(i2400m, skb, single_last, &msg_hdr->pld[i],
- skb->data + pl_itr);
- pl_itr += ALIGN(pl_size, I2400M_PL_ALIGN);
- cond_resched(); /* Don't monopolize */
- }
- kfree_skb(skb);
- /* Update device statistics */
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- i2400m->rx_pl_num += i;
- if (i > i2400m->rx_pl_max)
- i2400m->rx_pl_max = i;
- if (i < i2400m->rx_pl_min)
- i2400m->rx_pl_min = i;
- i2400m->rx_num++;
- i2400m->rx_size_acc += skb_len;
- if (skb_len < i2400m->rx_size_min)
- i2400m->rx_size_min = skb_len;
- if (skb_len > i2400m->rx_size_max)
- i2400m->rx_size_max = skb_len;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-error_pl_descr_check:
-error_pl_descr_short:
-error_msg_hdr_check:
- d_fnend(4, dev, "(i2400m %p skb %p [size %u]) = %d\n",
- i2400m, skb, skb_len, result);
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_rx);
-
-
-void i2400m_unknown_barker(struct i2400m *i2400m,
- const void *buf, size_t size)
-{
- struct device *dev = i2400m_dev(i2400m);
- char prefix[64];
- const __le32 *barker = buf;
- dev_err(dev, "RX: HW BUG? unknown barker %08x, "
- "dropping %zu bytes\n", le32_to_cpu(*barker), size);
- snprintf(prefix, sizeof(prefix), "%s %s: ",
- dev_driver_string(dev), dev_name(dev));
- if (size > 64) {
- print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
- 8, 4, buf, 64, 0);
- printk(KERN_ERR "%s... (only first 64 bytes "
- "dumped)\n", prefix);
- } else
- print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
- 8, 4, buf, size, 0);
-}
-EXPORT_SYMBOL(i2400m_unknown_barker);
-
-
-/*
- * Initialize the RX queue and infrastructure
- *
- * This sets up all the RX reordering infrastructures, which will not
- * be used if reordering is not enabled or if the firmware does not
- * support it. The device is told to do reordering in
- * i2400m_dev_initialize(), where it also looks at the value of the
- * i2400m->rx_reorder switch before taking a decission.
- *
- * Note we allocate the roq queues in one chunk and the actual logging
- * support for it (logging) in another one and then we setup the
- * pointers from the first to the last.
- */
-int i2400m_rx_setup(struct i2400m *i2400m)
-{
- int result = 0;
-
- i2400m->rx_reorder = i2400m_rx_reorder_disabled? 0 : 1;
- if (i2400m->rx_reorder) {
- unsigned itr;
- struct i2400m_roq_log *rd;
-
- result = -ENOMEM;
-
- i2400m->rx_roq = kcalloc(I2400M_RO_CIN + 1,
- sizeof(i2400m->rx_roq[0]), GFP_KERNEL);
- if (i2400m->rx_roq == NULL)
- goto error_roq_alloc;
-
- rd = kcalloc(I2400M_RO_CIN + 1, sizeof(*i2400m->rx_roq[0].log),
- GFP_KERNEL);
- if (rd == NULL) {
- result = -ENOMEM;
- goto error_roq_log_alloc;
- }
-
- for(itr = 0; itr < I2400M_RO_CIN + 1; itr++) {
- __i2400m_roq_init(&i2400m->rx_roq[itr]);
- i2400m->rx_roq[itr].log = &rd[itr];
- }
- kref_init(&i2400m->rx_roq_refcount);
- }
- return 0;
-
-error_roq_log_alloc:
- kfree(i2400m->rx_roq);
-error_roq_alloc:
- return result;
-}
-
-
-/* Tear down the RX queue and infrastructure */
-void i2400m_rx_release(struct i2400m *i2400m)
-{
- unsigned long flags;
-
- if (i2400m->rx_reorder) {
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- kref_put(&i2400m->rx_roq_refcount, i2400m_rx_roq_destroy);
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- }
- /* at this point, nothing can be received... */
- i2400m_report_hook_flush(i2400m);
-}
diff --git a/drivers/staging/wimax/i2400m/sysfs.c b/drivers/staging/wimax/i2400m/sysfs.c
deleted file mode 100644
index 895ee265909b..000000000000
--- a/drivers/staging/wimax/i2400m/sysfs.c
+++ /dev/null
@@ -1,65 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Sysfs interfaces to show driver and device information
- *
- * Copyright (C) 2007 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE sysfs
-#include "debug-levels.h"
-
-
-/*
- * Set the idle timeout (msecs)
- *
- * FIXME: eventually this should be a common WiMAX stack method, but
- * would like to wait to see how other devices manage it.
- */
-static
-ssize_t i2400m_idle_timeout_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t size)
-{
- ssize_t result;
- struct i2400m *i2400m = net_dev_to_i2400m(to_net_dev(dev));
- unsigned val;
-
- result = -EINVAL;
- if (sscanf(buf, "%u\n", &val) != 1)
- goto error_no_unsigned;
- if (val != 0 && (val < 100 || val > 300000 || val % 100 != 0)) {
- dev_err(dev, "idle_timeout: %u: invalid msecs specification; "
- "valid values are 0, 100-300000 in 100 increments\n",
- val);
- goto error_bad_value;
- }
- result = i2400m_set_idle_timeout(i2400m, val);
- if (result >= 0)
- result = size;
-error_no_unsigned:
-error_bad_value:
- return result;
-}
-
-static
-DEVICE_ATTR_WO(i2400m_idle_timeout);
-
-static
-struct attribute *i2400m_dev_attrs[] = {
- &dev_attr_i2400m_idle_timeout.attr,
- NULL,
-};
-
-struct attribute_group i2400m_dev_attr_group = {
- .name = NULL, /* we want them in the same directory */
- .attrs = i2400m_dev_attrs,
-};
diff --git a/drivers/staging/wimax/i2400m/tx.c b/drivers/staging/wimax/i2400m/tx.c
deleted file mode 100644
index aab37612745f..000000000000
--- a/drivers/staging/wimax/i2400m/tx.c
+++ /dev/null
@@ -1,1015 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Generic (non-bus specific) TX handling
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Rewritten to use a single FIFO to lower the memory allocation
- * pressure and optimize cache hits when copying to the queue, as
- * well as splitting out bus-specific code.
- *
- *
- * Implements data transmission to the device; this is done through a
- * software FIFO, as data/control frames can be coalesced (while the
- * device is reading the previous tx transaction, others accumulate).
- *
- * A FIFO is used because at the end it is resource-cheaper that trying
- * to implement scatter/gather over USB. As well, most traffic is going
- * to be download (vs upload).
- *
- * The format for sending/receiving data to/from the i2400m is
- * described in detail in rx.c:PROTOCOL FORMAT. In here we implement
- * the transmission of that. This is split between a bus-independent
- * part that just prepares everything and a bus-specific part that
- * does the actual transmission over the bus to the device (in the
- * bus-specific driver).
- *
- *
- * The general format of a device-host transaction is MSG-HDR, PLD1,
- * PLD2...PLDN, PL1, PL2,...PLN, PADDING.
- *
- * Because we need the send payload descriptors and then payloads and
- * because it is kind of expensive to do scatterlists in USB (one URB
- * per node), it becomes cheaper to append all the data to a FIFO
- * (copying to a FIFO potentially in cache is cheaper).
- *
- * Then the bus-specific code takes the parts of that FIFO that are
- * written and passes them to the device.
- *
- * So the concepts to keep in mind there are:
- *
- * We use a FIFO to queue the data in a linear buffer. We first append
- * a MSG-HDR, space for I2400M_TX_PLD_MAX payload descriptors and then
- * go appending payloads until we run out of space or of payload
- * descriptors. Then we append padding to make the whole transaction a
- * multiple of i2400m->bus_tx_block_size (as defined by the bus layer).
- *
- * - A TX message: a combination of a message header, payload
- * descriptors and payloads.
- *
- * Open: it is marked as active (i2400m->tx_msg is valid) and we
- * can keep adding payloads to it.
- *
- * Closed: we are not appending more payloads to this TX message
- * (exhausted space in the queue, too many payloads or
- * whichever). We have appended padding so the whole message
- * length is aligned to i2400m->bus_tx_block_size (as set by the
- * bus/transport layer).
- *
- * - Most of the time we keep a TX message open to which we append
- * payloads.
- *
- * - If we are going to append and there is no more space (we are at
- * the end of the FIFO), we close the message, mark the rest of the
- * FIFO space unusable (skip_tail), create a new message at the
- * beginning of the FIFO (if there is space) and append the message
- * there.
- *
- * This is because we need to give linear TX messages to the bus
- * engine. So we don't write a message to the remaining FIFO space
- * until the tail and continue at the head of it.
- *
- * - We overload one of the fields in the message header to use it as
- * 'size' of the TX message, so we can iterate over them. It also
- * contains a flag that indicates if we have to skip it or not.
- * When we send the buffer, we update that to its real on-the-wire
- * value.
- *
- * - The MSG-HDR PLD1...PLD2 stuff has to be a size multiple of 16.
- *
- * It follows that if MSG-HDR says we have N messages, the whole
- * header + descriptors is 16 + 4*N; for those to be a multiple of
- * 16, it follows that N can be 4, 8, 12, ... (32, 48, 64, 80...
- * bytes).
- *
- * So if we have only 1 payload, we have to submit a header that in
- * all truth has space for 4.
- *
- * The implication is that we reserve space for 12 (64 bytes); but
- * if we fill up only (eg) 2, our header becomes 32 bytes only. So
- * the TX engine has to shift those 32 bytes of msg header and 2
- * payloads and padding so that right after it the payloads start
- * and the TX engine has to know about that.
- *
- * It is cheaper to move the header up than the whole payloads down.
- *
- * We do this in i2400m_tx_close(). See 'i2400m_msg_hdr->offset'.
- *
- * - Each payload has to be size-padded to 16 bytes; before appending
- * it, we just do it.
- *
- * - The whole message has to be padded to i2400m->bus_tx_block_size;
- * we do this at close time. Thus, when reserving space for the
- * payload, we always make sure there is also free space for this
- * padding that sooner or later will happen.
- *
- * When we append a message, we tell the bus specific code to kick in
- * TXs. It will TX (in parallel) until the buffer is exhausted--hence
- * the lockin we do. The TX code will only send a TX message at the
- * time (which remember, might contain more than one payload). Of
- * course, when the bus-specific driver attempts to TX a message that
- * is still open, it gets closed first.
- *
- * Gee, this is messy; well a picture. In the example below we have a
- * partially full FIFO, with a closed message ready to be delivered
- * (with a moved message header to make sure it is size-aligned to
- * 16), TAIL room that was unusable (and thus is marked with a message
- * header that says 'skip this') and at the head of the buffer, an
- * incomplete message with a couple of payloads.
- *
- * N ___________________________________________________
- * | |
- * | TAIL room |
- * | |
- * | msg_hdr to skip (size |= 0x80000) |
- * |---------------------------------------------------|-------
- * | | /|\
- * | | |
- * | TX message padding | |
- * | | |
- * | | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
- * | | |
- * | payload 1 | |
- * | | N * tx_block_size
- * | | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
- * | | |
- * | payload 1 | |
- * | | |
- * | | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -|- -|- - - -
- * | padding 3 /|\ | | /|\
- * | padding 2 | | | |
- * | pld 1 32 bytes (2 * 16) | | |
- * | pld 0 | | | |
- * | moved msg_hdr \|/ | \|/ |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -|- - - |
- * | | _PLD_SIZE
- * | unused | |
- * | | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
- * | msg_hdr (size X) [this message is closed] | \|/
- * |===================================================|========== <=== OUT
- * | |
- * | |
- * | |
- * | Free rooom |
- * | |
- * | |
- * | |
- * | |
- * | |
- * | |
- * | |
- * | |
- * | |
- * |===================================================|========== <=== IN
- * | |
- * | |
- * | |
- * | |
- * | payload 1 |
- * | |
- * | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -|
- * | |
- * | payload 0 |
- * | |
- * | |
- * |- - - - - - - - - - - - - - - - - - - - - - - - - -|
- * | pld 11 /|\ |
- * | ... | |
- * | pld 1 64 bytes (2 * 16) |
- * | pld 0 | |
- * | msg_hdr (size X) \|/ [message is open] |
- * 0 ---------------------------------------------------
- *
- *
- * ROADMAP
- *
- * i2400m_tx_setup() Called by i2400m_setup
- * i2400m_tx_release() Called by i2400m_release()
- *
- * i2400m_tx() Called to send data or control frames
- * i2400m_tx_fifo_push() Allocates append-space in the FIFO
- * i2400m_tx_new() Opens a new message in the FIFO
- * i2400m_tx_fits() Checks if a new payload fits in the message
- * i2400m_tx_close() Closes an open message in the FIFO
- * i2400m_tx_skip_tail() Marks unusable FIFO tail space
- * i2400m->bus_tx_kick()
- *
- * Now i2400m->bus_tx_kick() is the the bus-specific driver backend
- * implementation; that would do:
- *
- * i2400m->bus_tx_kick()
- * i2400m_tx_msg_get() Gets first message ready to go
- * ...sends it...
- * i2400m_tx_msg_sent() Ack the message is sent; repeat from
- * _tx_msg_get() until it returns NULL
- * (FIFO empty).
- */
-#include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include "i2400m.h"
-
-
-#define D_SUBMODULE tx
-#include "debug-levels.h"
-
-enum {
- /**
- * TX Buffer size
- *
- * Doc says maximum transaction is 16KiB. If we had 16KiB en
- * route and 16KiB being queued, it boils down to needing
- * 32KiB.
- * 32KiB is insufficient for 1400 MTU, hence increasing
- * tx buffer size to 64KiB.
- */
- I2400M_TX_BUF_SIZE = 65536,
- /**
- * Message header and payload descriptors have to be 16
- * aligned (16 + 4 * N = 16 * M). If we take that average sent
- * packets are MTU size (~1400-~1500) it follows that we could
- * fit at most 10-11 payloads in one transaction. To meet the
- * alignment requirement, that means we need to leave space
- * for 12 (64 bytes). To simplify, we leave space for that. If
- * at the end there are less, we pad up to the nearest
- * multiple of 16.
- */
- /*
- * According to Intel Wimax i3200, i5x50 and i6x50 specification
- * documents, the maximum number of payloads per message can be
- * up to 60. Increasing the number of payloads to 60 per message
- * helps to accommodate smaller payloads in a single transaction.
- */
- I2400M_TX_PLD_MAX = 60,
- I2400M_TX_PLD_SIZE = sizeof(struct i2400m_msg_hdr)
- + I2400M_TX_PLD_MAX * sizeof(struct i2400m_pld),
- I2400M_TX_SKIP = 0x80000000,
- /*
- * According to Intel Wimax i3200, i5x50 and i6x50 specification
- * documents, the maximum size of each message can be up to 16KiB.
- */
- I2400M_TX_MSG_SIZE = 16384,
-};
-
-#define TAIL_FULL ((void *)~(unsigned long)NULL)
-
-/*
- * Calculate how much tail room is available
- *
- * Note the trick here. This path is ONLY called for Case A (see
- * i2400m_tx_fifo_push() below), where we have:
- *
- * Case A
- * N ___________
- * | tail room |
- * | |
- * |<- IN ->|
- * | |
- * | data |
- * | |
- * |<- OUT ->|
- * | |
- * | head room |
- * 0 -----------
- *
- * When calculating the tail_room, tx_in might get to be zero if
- * i2400m->tx_in is right at the end of the buffer (really full
- * buffer) if there is no head room. In this case, tail_room would be
- * I2400M_TX_BUF_SIZE, although it is actually zero. Hence the final
- * mod (%) operation. However, when doing this kind of optimization,
- * i2400m->tx_in being zero would fail, so we treat is an a special
- * case.
- */
-static inline
-size_t __i2400m_tx_tail_room(struct i2400m *i2400m)
-{
- size_t tail_room;
- size_t tx_in;
-
- if (unlikely(i2400m->tx_in == 0))
- return I2400M_TX_BUF_SIZE;
- tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE;
- tail_room = I2400M_TX_BUF_SIZE - tx_in;
- tail_room %= I2400M_TX_BUF_SIZE;
- return tail_room;
-}
-
-
-/*
- * Allocate @size bytes in the TX fifo, return a pointer to it
- *
- * @i2400m: device descriptor
- * @size: size of the buffer we need to allocate
- * @padding: ensure that there is at least this many bytes of free
- * contiguous space in the fifo. This is needed because later on
- * we might need to add padding.
- * @try_head: specify either to allocate head room or tail room space
- * in the TX FIFO. This boolean is required to avoids a system hang
- * due to an infinite loop caused by i2400m_tx_fifo_push().
- * The caller must always try to allocate tail room space first by
- * calling this routine with try_head = 0. In case if there
- * is not enough tail room space but there is enough head room space,
- * (i2400m_tx_fifo_push() returns TAIL_FULL) try to allocate head
- * room space, by calling this routine again with try_head = 1.
- *
- * Returns:
- *
- * Pointer to the allocated space. NULL if there is no
- * space. TAIL_FULL if there is no space at the tail but there is at
- * the head (Case B below).
- *
- * These are the two basic cases we need to keep an eye for -- it is
- * much better explained in linux/kernel/kfifo.c, but this code
- * basically does the same. No rocket science here.
- *
- * Case A Case B
- * N ___________ ___________
- * | tail room | | data |
- * | | | |
- * |<- IN ->| |<- OUT ->|
- * | | | |
- * | data | | room |
- * | | | |
- * |<- OUT ->| |<- IN ->|
- * | | | |
- * | head room | | data |
- * 0 ----------- -----------
- *
- * We allocate only *contiguous* space.
- *
- * We can allocate only from 'room'. In Case B, it is simple; in case
- * A, we only try from the tail room; if it is not enough, we just
- * fail and return TAIL_FULL and let the caller figure out if we wants to
- * skip the tail room and try to allocate from the head.
- *
- * There is a corner case, wherein i2400m_tx_new() can get into
- * an infinite loop calling i2400m_tx_fifo_push().
- * In certain situations, tx_in would have reached on the top of TX FIFO
- * and i2400m_tx_tail_room() returns 0, as described below:
- *
- * N ___________ tail room is zero
- * |<- IN ->|
- * | |
- * | |
- * | |
- * | data |
- * |<- OUT ->|
- * | |
- * | |
- * | head room |
- * 0 -----------
- * During such a time, where tail room is zero in the TX FIFO and if there
- * is a request to add a payload to TX FIFO, which calls:
- * i2400m_tx()
- * ->calls i2400m_tx_close()
- * ->calls i2400m_tx_skip_tail()
- * goto try_new;
- * ->calls i2400m_tx_new()
- * |----> [try_head:]
- * infinite loop | ->calls i2400m_tx_fifo_push()
- * | if (tail_room < needed)
- * | if (head_room => needed)
- * | return TAIL_FULL;
- * |<---- goto try_head;
- *
- * i2400m_tx() calls i2400m_tx_close() to close the message, since there
- * is no tail room to accommodate the payload and calls
- * i2400m_tx_skip_tail() to skip the tail space. Now i2400m_tx() calls
- * i2400m_tx_new() to allocate space for new message header calling
- * i2400m_tx_fifo_push() that returns TAIL_FULL, since there is no tail space
- * to accommodate the message header, but there is enough head space.
- * The i2400m_tx_new() keeps re-retrying by calling i2400m_tx_fifo_push()
- * ending up in a loop causing system freeze.
- *
- * This corner case is avoided by using a try_head boolean,
- * as an argument to i2400m_tx_fifo_push().
- *
- * Note:
- *
- * Assumes i2400m->tx_lock is taken, and we use that as a barrier
- *
- * The indexes keep increasing and we reset them to zero when we
- * pop data off the queue
- */
-static
-void *i2400m_tx_fifo_push(struct i2400m *i2400m, size_t size,
- size_t padding, bool try_head)
-{
- struct device *dev = i2400m_dev(i2400m);
- size_t room, tail_room, needed_size;
- void *ptr;
-
- needed_size = size + padding;
- room = I2400M_TX_BUF_SIZE - (i2400m->tx_in - i2400m->tx_out);
- if (room < needed_size) { /* this takes care of Case B */
- d_printf(2, dev, "fifo push %zu/%zu: no space\n",
- size, padding);
- return NULL;
- }
- /* Is there space at the tail? */
- tail_room = __i2400m_tx_tail_room(i2400m);
- if (!try_head && tail_room < needed_size) {
- /*
- * If the tail room space is not enough to push the message
- * in the TX FIFO, then there are two possibilities:
- * 1. There is enough head room space to accommodate
- * this message in the TX FIFO.
- * 2. There is not enough space in the head room and
- * in tail room of the TX FIFO to accommodate the message.
- * In the case (1), return TAIL_FULL so that the caller
- * can figure out, if the caller wants to push the message
- * into the head room space.
- * In the case (2), return NULL, indicating that the TX FIFO
- * cannot accommodate the message.
- */
- if (room - tail_room >= needed_size) {
- d_printf(2, dev, "fifo push %zu/%zu: tail full\n",
- size, padding);
- return TAIL_FULL; /* There might be head space */
- } else {
- d_printf(2, dev, "fifo push %zu/%zu: no head space\n",
- size, padding);
- return NULL; /* There is no space */
- }
- }
- ptr = i2400m->tx_buf + i2400m->tx_in % I2400M_TX_BUF_SIZE;
- d_printf(2, dev, "fifo push %zu/%zu: at @%zu\n", size, padding,
- i2400m->tx_in % I2400M_TX_BUF_SIZE);
- i2400m->tx_in += size;
- return ptr;
-}
-
-
-/*
- * Mark the tail of the FIFO buffer as 'to-skip'
- *
- * We should never hit the BUG_ON() because all the sizes we push to
- * the FIFO are padded to be a multiple of 16 -- the size of *msg
- * (I2400M_PL_PAD for the payloads, I2400M_TX_PLD_SIZE for the
- * header).
- *
- * Tail room can get to be zero if a message was opened when there was
- * space only for a header. _tx_close() will mark it as to-skip (as it
- * will have no payloads) and there will be no more space to flush, so
- * nothing has to be done here. This is probably cheaper than ensuring
- * in _tx_new() that there is some space for payloads...as we could
- * always possibly hit the same problem if the payload wouldn't fit.
- *
- * Note:
- *
- * Assumes i2400m->tx_lock is taken, and we use that as a barrier
- *
- * This path is only taken for Case A FIFO situations [see
- * i2400m_tx_fifo_push()]
- */
-static
-void i2400m_tx_skip_tail(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- size_t tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE;
- size_t tail_room = __i2400m_tx_tail_room(i2400m);
- struct i2400m_msg_hdr *msg = i2400m->tx_buf + tx_in;
- if (unlikely(tail_room == 0))
- return;
- BUG_ON(tail_room < sizeof(*msg));
- msg->size = tail_room | I2400M_TX_SKIP;
- d_printf(2, dev, "skip tail: skipping %zu bytes @%zu\n",
- tail_room, tx_in);
- i2400m->tx_in += tail_room;
-}
-
-
-/*
- * Check if a skb will fit in the TX queue's current active TX
- * message (if there are still descriptors left unused).
- *
- * Returns:
- * 0 if the message won't fit, 1 if it will.
- *
- * Note:
- *
- * Assumes a TX message is active (i2400m->tx_msg).
- *
- * Assumes i2400m->tx_lock is taken, and we use that as a barrier
- */
-static
-unsigned i2400m_tx_fits(struct i2400m *i2400m)
-{
- struct i2400m_msg_hdr *msg_hdr = i2400m->tx_msg;
- return le16_to_cpu(msg_hdr->num_pls) < I2400M_TX_PLD_MAX;
-
-}
-
-
-/*
- * Start a new TX message header in the queue.
- *
- * Reserve memory from the base FIFO engine and then just initialize
- * the message header.
- *
- * We allocate the biggest TX message header we might need (one that'd
- * fit I2400M_TX_PLD_MAX payloads) -- when it is closed it will be
- * 'ironed it out' and the unneeded parts removed.
- *
- * NOTE:
- *
- * Assumes that the previous message is CLOSED (eg: either
- * there was none or 'i2400m_tx_close()' was called on it).
- *
- * Assumes i2400m->tx_lock is taken, and we use that as a barrier
- */
-static
-void i2400m_tx_new(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_msg_hdr *tx_msg;
- bool try_head = false;
- BUG_ON(i2400m->tx_msg != NULL);
- /*
- * In certain situations, TX queue might have enough space to
- * accommodate the new message header I2400M_TX_PLD_SIZE, but
- * might not have enough space to accommodate the payloads.
- * Adding bus_tx_room_min padding while allocating a new TX message
- * increases the possibilities of including at least one payload of the
- * size <= bus_tx_room_min.
- */
-try_head:
- tx_msg = i2400m_tx_fifo_push(i2400m, I2400M_TX_PLD_SIZE,
- i2400m->bus_tx_room_min, try_head);
- if (tx_msg == NULL)
- goto out;
- else if (tx_msg == TAIL_FULL) {
- i2400m_tx_skip_tail(i2400m);
- d_printf(2, dev, "new TX message: tail full, trying head\n");
- try_head = true;
- goto try_head;
- }
- memset(tx_msg, 0, I2400M_TX_PLD_SIZE);
- tx_msg->size = I2400M_TX_PLD_SIZE;
-out:
- i2400m->tx_msg = tx_msg;
- d_printf(2, dev, "new TX message: %p @%zu\n",
- tx_msg, (void *) tx_msg - i2400m->tx_buf);
-}
-
-
-/*
- * Finalize the current TX message header
- *
- * Sets the message header to be at the proper location depending on
- * how many descriptors we have (check documentation at the file's
- * header for more info on that).
- *
- * Appends padding bytes to make sure the whole TX message (counting
- * from the 'relocated' message header) is aligned to
- * tx_block_size. We assume the _append() code has left enough space
- * in the FIFO for that. If there are no payloads, just pass, as it
- * won't be transferred.
- *
- * The amount of padding bytes depends on how many payloads are in the
- * TX message, as the "msg header and payload descriptors" will be
- * shifted up in the buffer.
- */
-static
-void i2400m_tx_close(struct i2400m *i2400m)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_msg_hdr *tx_msg = i2400m->tx_msg;
- struct i2400m_msg_hdr *tx_msg_moved;
- size_t aligned_size, padding, hdr_size;
- void *pad_buf;
- unsigned num_pls;
-
- if (tx_msg->size & I2400M_TX_SKIP) /* a skipper? nothing to do */
- goto out;
- num_pls = le16_to_cpu(tx_msg->num_pls);
- /* We can get this situation when a new message was started
- * and there was no space to add payloads before hitting the
- tail (and taking padding into consideration). */
- if (num_pls == 0) {
- tx_msg->size |= I2400M_TX_SKIP;
- goto out;
- }
- /* Relocate the message header
- *
- * Find the current header size, align it to 16 and if we need
- * to move it so the tail is next to the payloads, move it and
- * set the offset.
- *
- * If it moved, this header is good only for transmission; the
- * original one (it is kept if we moved) is still used to
- * figure out where the next TX message starts (and where the
- * offset to the moved header is).
- */
- hdr_size = struct_size(tx_msg, pld, le16_to_cpu(tx_msg->num_pls));
- hdr_size = ALIGN(hdr_size, I2400M_PL_ALIGN);
- tx_msg->offset = I2400M_TX_PLD_SIZE - hdr_size;
- tx_msg_moved = (void *) tx_msg + tx_msg->offset;
- memmove(tx_msg_moved, tx_msg, hdr_size);
- tx_msg_moved->size -= tx_msg->offset;
- /*
- * Now figure out how much we have to add to the (moved!)
- * message so the size is a multiple of i2400m->bus_tx_block_size.
- */
- aligned_size = ALIGN(tx_msg_moved->size, i2400m->bus_tx_block_size);
- padding = aligned_size - tx_msg_moved->size;
- if (padding > 0) {
- pad_buf = i2400m_tx_fifo_push(i2400m, padding, 0, 0);
- if (WARN_ON(pad_buf == NULL || pad_buf == TAIL_FULL)) {
- /* This should not happen -- append should verify
- * there is always space left at least to append
- * tx_block_size */
- dev_err(dev,
- "SW BUG! Possible data leakage from memory the "
- "device should not read for padding - "
- "size %lu aligned_size %zu tx_buf %p in "
- "%zu out %zu\n",
- (unsigned long) tx_msg_moved->size,
- aligned_size, i2400m->tx_buf, i2400m->tx_in,
- i2400m->tx_out);
- } else
- memset(pad_buf, 0xad, padding);
- }
- tx_msg_moved->padding = cpu_to_le16(padding);
- tx_msg_moved->size += padding;
- if (tx_msg != tx_msg_moved)
- tx_msg->size += padding;
-out:
- i2400m->tx_msg = NULL;
-}
-
-
-/**
- * i2400m_tx - send the data in a buffer to the device
- *
- * @i2400m: device descriptor
- *
- * @buf: pointer to the buffer to transmit
- *
- * @buf_len: buffer size
- *
- * @pl_type: type of the payload we are sending.
- *
- * Returns:
- * 0 if ok, < 0 errno code on error (-ENOSPC, if there is no more
- * room for the message in the queue).
- *
- * Appends the buffer to the TX FIFO and notifies the bus-specific
- * part of the driver that there is new data ready to transmit.
- * Once this function returns, the buffer has been copied, so it can
- * be reused.
- *
- * The steps followed to append are explained in detail in the file
- * header.
- *
- * Whenever we write to a message, we increase msg->size, so it
- * reflects exactly how big the message is. This is needed so that if
- * we concatenate two messages before they can be sent, the code that
- * sends the messages can find the boundaries (and it will replace the
- * size with the real barker before sending).
- *
- * Note:
- *
- * Cold and warm reset payloads need to be sent as a single
- * payload, so we handle that.
- */
-int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len,
- enum i2400m_pt pl_type)
-{
- int result = -ENOSPC;
- struct device *dev = i2400m_dev(i2400m);
- unsigned long flags;
- size_t padded_len;
- void *ptr;
- bool try_head = false;
- unsigned is_singleton = pl_type == I2400M_PT_RESET_WARM
- || pl_type == I2400M_PT_RESET_COLD;
-
- d_fnstart(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u)\n",
- i2400m, buf, buf_len, pl_type);
- padded_len = ALIGN(buf_len, I2400M_PL_ALIGN);
- d_printf(5, dev, "padded_len %zd buf_len %zd\n", padded_len, buf_len);
- /* If there is no current TX message, create one; if the
- * current one is out of payload slots or we have a singleton,
- * close it and start a new one */
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- /* If tx_buf is NULL, device is shutdown */
- if (i2400m->tx_buf == NULL) {
- result = -ESHUTDOWN;
- goto error_tx_new;
- }
-try_new:
- if (unlikely(i2400m->tx_msg == NULL))
- i2400m_tx_new(i2400m);
- else if (unlikely(!i2400m_tx_fits(i2400m)
- || (is_singleton && i2400m->tx_msg->num_pls != 0))) {
- d_printf(2, dev, "closing TX message (fits %u singleton "
- "%u num_pls %u)\n", i2400m_tx_fits(i2400m),
- is_singleton, i2400m->tx_msg->num_pls);
- i2400m_tx_close(i2400m);
- i2400m_tx_new(i2400m);
- }
- if (i2400m->tx_msg == NULL)
- goto error_tx_new;
- /*
- * Check if this skb will fit in the TX queue's current active
- * TX message. The total message size must not exceed the maximum
- * size of each message I2400M_TX_MSG_SIZE. If it exceeds,
- * close the current message and push this skb into the new message.
- */
- if (i2400m->tx_msg->size + padded_len > I2400M_TX_MSG_SIZE) {
- d_printf(2, dev, "TX: message too big, going new\n");
- i2400m_tx_close(i2400m);
- i2400m_tx_new(i2400m);
- }
- if (i2400m->tx_msg == NULL)
- goto error_tx_new;
- /* So we have a current message header; now append space for
- * the message -- if there is not enough, try the head */
- ptr = i2400m_tx_fifo_push(i2400m, padded_len,
- i2400m->bus_tx_block_size, try_head);
- if (ptr == TAIL_FULL) { /* Tail is full, try head */
- d_printf(2, dev, "pl append: tail full\n");
- i2400m_tx_close(i2400m);
- i2400m_tx_skip_tail(i2400m);
- try_head = true;
- goto try_new;
- } else if (ptr == NULL) { /* All full */
- result = -ENOSPC;
- d_printf(2, dev, "pl append: all full\n");
- } else { /* Got space, copy it, set padding */
- struct i2400m_msg_hdr *tx_msg = i2400m->tx_msg;
- unsigned num_pls = le16_to_cpu(tx_msg->num_pls);
- memcpy(ptr, buf, buf_len);
- memset(ptr + buf_len, 0xad, padded_len - buf_len);
- i2400m_pld_set(&tx_msg->pld[num_pls], buf_len, pl_type);
- d_printf(3, dev, "pld 0x%08x (type 0x%1x len 0x%04zx\n",
- le32_to_cpu(tx_msg->pld[num_pls].val),
- pl_type, buf_len);
- tx_msg->num_pls = cpu_to_le16(num_pls + 1);
- tx_msg->size += padded_len;
- d_printf(2, dev, "TX: appended %zu b (up to %u b) pl #%u\n",
- padded_len, tx_msg->size, num_pls+1);
- d_printf(2, dev,
- "TX: appended hdr @%zu %zu b pl #%u @%zu %zu/%zu b\n",
- (void *)tx_msg - i2400m->tx_buf, (size_t)tx_msg->size,
- num_pls+1, ptr - i2400m->tx_buf, buf_len, padded_len);
- result = 0;
- if (is_singleton)
- i2400m_tx_close(i2400m);
- }
-error_tx_new:
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- /* kick in most cases, except when the TX subsys is down, as
- * it might free space */
- if (likely(result != -ESHUTDOWN))
- i2400m->bus_tx_kick(i2400m);
- d_fnend(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u) = %d\n",
- i2400m, buf, buf_len, pl_type, result);
- return result;
-}
-EXPORT_SYMBOL_GPL(i2400m_tx);
-
-
-/**
- * i2400m_tx_msg_get - Get the first TX message in the FIFO to start sending it
- *
- * @i2400m: device descriptors
- * @bus_size: where to place the size of the TX message
- *
- * Called by the bus-specific driver to get the first TX message at
- * the FIF that is ready for transmission.
- *
- * It sets the state in @i2400m to indicate the bus-specific driver is
- * transferring that message (i2400m->tx_msg_size).
- *
- * Once the transfer is completed, call i2400m_tx_msg_sent().
- *
- * Notes:
- *
- * The size of the TX message to be transmitted might be smaller than
- * that of the TX message in the FIFO (in case the header was
- * shorter). Hence, we copy it in @bus_size, for the bus layer to
- * use. We keep the message's size in i2400m->tx_msg_size so that
- * when the bus later is done transferring we know how much to
- * advance the fifo.
- *
- * We collect statistics here as all the data is available and we
- * assume it is going to work [see i2400m_tx_msg_sent()].
- */
-struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *i2400m,
- size_t *bus_size)
-{
- struct device *dev = i2400m_dev(i2400m);
- struct i2400m_msg_hdr *tx_msg, *tx_msg_moved;
- unsigned long flags, pls;
-
- d_fnstart(3, dev, "(i2400m %p bus_size %p)\n", i2400m, bus_size);
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- tx_msg_moved = NULL;
- if (i2400m->tx_buf == NULL)
- goto out_unlock;
-skip:
- tx_msg_moved = NULL;
- if (i2400m->tx_in == i2400m->tx_out) { /* Empty FIFO? */
- i2400m->tx_in = 0;
- i2400m->tx_out = 0;
- d_printf(2, dev, "TX: FIFO empty: resetting\n");
- goto out_unlock;
- }
- tx_msg = i2400m->tx_buf + i2400m->tx_out % I2400M_TX_BUF_SIZE;
- if (tx_msg->size & I2400M_TX_SKIP) { /* skip? */
- d_printf(2, dev, "TX: skip: msg @%zu (%zu b)\n",
- i2400m->tx_out % I2400M_TX_BUF_SIZE,
- (size_t) tx_msg->size & ~I2400M_TX_SKIP);
- i2400m->tx_out += tx_msg->size & ~I2400M_TX_SKIP;
- goto skip;
- }
-
- if (tx_msg->num_pls == 0) { /* No payloads? */
- if (tx_msg == i2400m->tx_msg) { /* open, we are done */
- d_printf(2, dev,
- "TX: FIFO empty: open msg w/o payloads @%zu\n",
- (void *) tx_msg - i2400m->tx_buf);
- tx_msg = NULL;
- goto out_unlock;
- } else { /* closed, skip it */
- d_printf(2, dev,
- "TX: skip msg w/o payloads @%zu (%zu b)\n",
- (void *) tx_msg - i2400m->tx_buf,
- (size_t) tx_msg->size);
- i2400m->tx_out += tx_msg->size & ~I2400M_TX_SKIP;
- goto skip;
- }
- }
- if (tx_msg == i2400m->tx_msg) /* open msg? */
- i2400m_tx_close(i2400m);
-
- /* Now we have a valid TX message (with payloads) to TX */
- tx_msg_moved = (void *) tx_msg + tx_msg->offset;
- i2400m->tx_msg_size = tx_msg->size;
- *bus_size = tx_msg_moved->size;
- d_printf(2, dev, "TX: pid %d msg hdr at @%zu offset +@%zu "
- "size %zu bus_size %zu\n",
- current->pid, (void *) tx_msg - i2400m->tx_buf,
- (size_t) tx_msg->offset, (size_t) tx_msg->size,
- (size_t) tx_msg_moved->size);
- tx_msg_moved->barker = cpu_to_le32(I2400M_H2D_PREVIEW_BARKER);
- tx_msg_moved->sequence = cpu_to_le32(i2400m->tx_sequence++);
-
- pls = le16_to_cpu(tx_msg_moved->num_pls);
- i2400m->tx_pl_num += pls; /* Update stats */
- if (pls > i2400m->tx_pl_max)
- i2400m->tx_pl_max = pls;
- if (pls < i2400m->tx_pl_min)
- i2400m->tx_pl_min = pls;
- i2400m->tx_num++;
- i2400m->tx_size_acc += *bus_size;
- if (*bus_size < i2400m->tx_size_min)
- i2400m->tx_size_min = *bus_size;
- if (*bus_size > i2400m->tx_size_max)
- i2400m->tx_size_max = *bus_size;
-out_unlock:
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- d_fnstart(3, dev, "(i2400m %p bus_size %p [%zu]) = %p\n",
- i2400m, bus_size, *bus_size, tx_msg_moved);
- return tx_msg_moved;
-}
-EXPORT_SYMBOL_GPL(i2400m_tx_msg_get);
-
-
-/**
- * i2400m_tx_msg_sent - indicate the transmission of a TX message
- *
- * @i2400m: device descriptor
- *
- * Called by the bus-specific driver when a message has been sent;
- * this pops it from the FIFO; and as there is space, start the queue
- * in case it was stopped.
- *
- * Should be called even if the message send failed and we are
- * dropping this TX message.
- */
-void i2400m_tx_msg_sent(struct i2400m *i2400m)
-{
- unsigned n;
- unsigned long flags;
- struct device *dev = i2400m_dev(i2400m);
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- if (i2400m->tx_buf == NULL)
- goto out_unlock;
- i2400m->tx_out += i2400m->tx_msg_size;
- d_printf(2, dev, "TX: sent %zu b\n", (size_t) i2400m->tx_msg_size);
- i2400m->tx_msg_size = 0;
- BUG_ON(i2400m->tx_out > i2400m->tx_in);
- /* level them FIFO markers off */
- n = i2400m->tx_out / I2400M_TX_BUF_SIZE;
- i2400m->tx_out %= I2400M_TX_BUF_SIZE;
- i2400m->tx_in -= n * I2400M_TX_BUF_SIZE;
-out_unlock:
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-EXPORT_SYMBOL_GPL(i2400m_tx_msg_sent);
-
-
-/**
- * i2400m_tx_setup - Initialize the TX queue and infrastructure
- *
- * @i2400m: device descriptor
- *
- * Make sure we reset the TX sequence to zero, as when this function
- * is called, the firmware has been just restarted. Same rational
- * for tx_in, tx_out, tx_msg_size and tx_msg. We reset them since
- * the memory for TX queue is reallocated.
- */
-int i2400m_tx_setup(struct i2400m *i2400m)
-{
- int result = 0;
- void *tx_buf;
- unsigned long flags;
-
- /* Do this here only once -- can't do on
- * i2400m_hard_start_xmit() as we'll cause race conditions if
- * the WS was scheduled on another CPU */
- INIT_WORK(&i2400m->wake_tx_ws, i2400m_wake_tx_work);
-
- tx_buf = kmalloc(I2400M_TX_BUF_SIZE, GFP_ATOMIC);
- if (tx_buf == NULL) {
- result = -ENOMEM;
- goto error_kmalloc;
- }
-
- /*
- * Fail the build if we can't fit at least two maximum size messages
- * on the TX FIFO [one being delivered while one is constructed].
- */
- BUILD_BUG_ON(2 * I2400M_TX_MSG_SIZE > I2400M_TX_BUF_SIZE);
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- i2400m->tx_sequence = 0;
- i2400m->tx_in = 0;
- i2400m->tx_out = 0;
- i2400m->tx_msg_size = 0;
- i2400m->tx_msg = NULL;
- i2400m->tx_buf = tx_buf;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- /* Huh? the bus layer has to define this... */
- BUG_ON(i2400m->bus_tx_block_size == 0);
-error_kmalloc:
- return result;
-
-}
-
-
-/*
- * i2400m_tx_release - Tear down the TX queue and infrastructure
- */
-void i2400m_tx_release(struct i2400m *i2400m)
-{
- unsigned long flags;
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- kfree(i2400m->tx_buf);
- i2400m->tx_buf = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-}
diff --git a/drivers/staging/wimax/i2400m/usb-debug-levels.h b/drivers/staging/wimax/i2400m/usb-debug-levels.h
deleted file mode 100644
index 8fd0111560f6..000000000000
--- a/drivers/staging/wimax/i2400m/usb-debug-levels.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Debug levels control file for the i2400m-usb module
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-#ifndef __debug_levels__h__
-#define __debug_levels__h__
-
-/* Maximum compile and run time debug level for all submodules */
-#define D_MODULENAME i2400m_usb
-#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
-
-#include "../linux-wimax-debug.h"
-
-/* List of all the enabled modules */
-enum d_module {
- D_SUBMODULE_DECLARE(usb),
- D_SUBMODULE_DECLARE(fw),
- D_SUBMODULE_DECLARE(notif),
- D_SUBMODULE_DECLARE(rx),
- D_SUBMODULE_DECLARE(tx),
-};
-
-
-#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/staging/wimax/i2400m/usb-fw.c b/drivers/staging/wimax/i2400m/usb-fw.c
deleted file mode 100644
index 27ab233650d5..000000000000
--- a/drivers/staging/wimax/i2400m/usb-fw.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Firmware uploader's USB specifics
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - bus generic/specific split
- *
- * THE PROCEDURE
- *
- * See fw.c for the generic description of this procedure.
- *
- * This file implements only the USB specifics. It boils down to how
- * to send a command and waiting for an acknowledgement from the
- * device.
- *
- * This code (and process) is single threaded. It assumes it is the
- * only thread poking around (guaranteed by fw.c).
- *
- * COMMAND EXECUTION
- *
- * A write URB is posted with the buffer to the bulk output endpoint.
- *
- * ACK RECEPTION
- *
- * We just post a URB to the notification endpoint and wait for
- * data. We repeat until we get all the data we expect (as indicated
- * by the call from the bus generic code).
- *
- * The data is not read from the bulk in endpoint for boot mode.
- *
- * ROADMAP
- *
- * i2400mu_bus_bm_cmd_send
- * i2400m_bm_cmd_prepare...
- * i2400mu_tx_bulk_out
- *
- * i2400mu_bus_bm_wait_for_ack
- * i2400m_notif_submit
- */
-#include <linux/usb.h>
-#include <linux/gfp.h>
-#include "i2400m-usb.h"
-
-
-#define D_SUBMODULE fw
-#include "usb-debug-levels.h"
-
-
-/*
- * Synchronous write to the device
- *
- * Takes care of updating EDC counts and thus, handle device errors.
- */
-static
-ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
-{
- int result;
- struct device *dev = &i2400mu->usb_iface->dev;
- int len;
- struct usb_endpoint_descriptor *epd;
- int pipe, do_autopm = 1;
-
- result = usb_autopm_get_interface(i2400mu->usb_iface);
- if (result < 0) {
- dev_err(dev, "BM-CMD: can't get autopm: %d\n", result);
- do_autopm = 0;
- }
- epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_out);
- pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
-retry:
- result = usb_bulk_msg(i2400mu->usb_dev, pipe, buf, buf_size, &len, 200);
- switch (result) {
- case 0:
- if (len != buf_size) {
- dev_err(dev, "BM-CMD: short write (%u B vs %zu "
- "expected)\n", len, buf_size);
- result = -EIO;
- break;
- }
- result = len;
- break;
- case -EPIPE:
- /*
- * Stall -- maybe the device is choking with our
- * requests. Clear it and give it some time. If they
- * happen to often, it might be another symptom, so we
- * reset.
- *
- * No error handling for usb_clear_halt(0; if it
- * works, the retry works; if it fails, this switch
- * does the error handling for us.
- */
- if (edc_inc(&i2400mu->urb_edc,
- 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "BM-CMD: too many stalls in "
- "URB; resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- } else {
- usb_clear_halt(i2400mu->usb_dev, pipe);
- msleep(10); /* give the device some time */
- goto retry;
- }
- fallthrough;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* just ignore it */
- case -ESHUTDOWN: /* and exit */
- case -ECONNRESET:
- result = -ESHUTDOWN;
- break;
- case -ETIMEDOUT: /* bah... */
- break;
- default: /* any other? */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "BM-CMD: maximum errors in "
- "URB exceeded; resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- result = -ENODEV;
- break;
- }
- dev_err(dev, "BM-CMD: URB error %d, retrying\n",
- result);
- goto retry;
- }
- if (do_autopm)
- usb_autopm_put_interface(i2400mu->usb_iface);
- return result;
-}
-
-
-/*
- * Send a boot-mode command over the bulk-out pipe
- *
- * Command can be a raw command, which requires no preparation (and
- * which might not even be following the command format). Checks that
- * the right amount of data was transferred.
- *
- * To satisfy USB requirements (no onstack, vmalloc or in data segment
- * buffers), we copy the command to i2400m->bm_cmd_buf and send it from
- * there.
- *
- * @flags: pass thru from i2400m_bm_cmd()
- * @return: cmd_size if ok, < 0 errno code on error.
- */
-ssize_t i2400mu_bus_bm_cmd_send(struct i2400m *i2400m,
- const struct i2400m_bootrom_header *_cmd,
- size_t cmd_size, int flags)
-{
- ssize_t result;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
- struct i2400m_bootrom_header *cmd;
- size_t cmd_size_a = ALIGN(cmd_size, 16); /* USB restriction */
-
- d_fnstart(8, dev, "(i2400m %p cmd %p size %zu)\n",
- i2400m, _cmd, cmd_size);
- result = -E2BIG;
- if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
- goto error_too_big;
- if (_cmd != i2400m->bm_cmd_buf)
- memmove(i2400m->bm_cmd_buf, _cmd, cmd_size);
- cmd = i2400m->bm_cmd_buf;
- if (cmd_size_a > cmd_size) /* Zero pad space */
- memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
- if ((flags & I2400M_BM_CMD_RAW) == 0) {
- if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
- dev_warn(dev, "SW BUG: response_required == 0\n");
- i2400m_bm_cmd_prepare(cmd);
- }
- result = i2400mu_tx_bulk_out(i2400mu, i2400m->bm_cmd_buf, cmd_size);
- if (result < 0) {
- dev_err(dev, "boot-mode cmd %d: cannot send: %zd\n",
- opcode, result);
- goto error_cmd_send;
- }
- if (result != cmd_size) { /* all was transferred? */
- dev_err(dev, "boot-mode cmd %d: incomplete transfer "
- "(%zd vs %zu submitted)\n", opcode, result, cmd_size);
- result = -EIO;
- goto error_cmd_size;
- }
-error_cmd_size:
-error_cmd_send:
-error_too_big:
- d_fnend(8, dev, "(i2400m %p cmd %p size %zu) = %zd\n",
- i2400m, _cmd, cmd_size, result);
- return result;
-}
-
-
-static
-void __i2400mu_bm_notif_cb(struct urb *urb)
-{
- complete(urb->context);
-}
-
-
-/*
- * submit a read to the notification endpoint
- *
- * @i2400m: device descriptor
- * @urb: urb to use
- * @completion: completion variable to complete when done
- *
- * Data is always read to i2400m->bm_ack_buf
- */
-static
-int i2400mu_notif_submit(struct i2400mu *i2400mu, struct urb *urb,
- struct completion *completion)
-{
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct usb_endpoint_descriptor *epd;
- int pipe;
-
- epd = usb_get_epd(i2400mu->usb_iface,
- i2400mu->endpoint_cfg.notification);
- pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
- usb_fill_int_urb(urb, i2400mu->usb_dev, pipe,
- i2400m->bm_ack_buf, I2400M_BM_ACK_BUF_SIZE,
- __i2400mu_bm_notif_cb, completion,
- epd->bInterval);
- return usb_submit_urb(urb, GFP_KERNEL);
-}
-
-
-/*
- * Read an ack from the notification endpoint
- *
- * @i2400m:
- * @_ack: pointer to where to store the read data
- * @ack_size: how many bytes we should read
- *
- * Returns: < 0 errno code on error; otherwise, amount of received bytes.
- *
- * Submits a notification read, appends the read data to the given ack
- * buffer and then repeats (until @ack_size bytes have been
- * received).
- */
-ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *i2400m,
- struct i2400m_bootrom_header *_ack,
- size_t ack_size)
-{
- ssize_t result = -ENOMEM;
- struct device *dev = i2400m_dev(i2400m);
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- struct urb notif_urb;
- void *ack = _ack;
- size_t offset, len;
- long val;
- int do_autopm = 1;
- DECLARE_COMPLETION_ONSTACK(notif_completion);
-
- d_fnstart(8, dev, "(i2400m %p ack %p size %zu)\n",
- i2400m, ack, ack_size);
- BUG_ON(_ack == i2400m->bm_ack_buf);
- result = usb_autopm_get_interface(i2400mu->usb_iface);
- if (result < 0) {
- dev_err(dev, "BM-ACK: can't get autopm: %d\n", (int) result);
- do_autopm = 0;
- }
- usb_init_urb(¬if_urb); /* ready notifications */
- usb_get_urb(¬if_urb);
- offset = 0;
- while (offset < ack_size) {
- init_completion(¬if_completion);
- result = i2400mu_notif_submit(i2400mu, ¬if_urb,
- ¬if_completion);
- if (result < 0)
- goto error_notif_urb_submit;
- val = wait_for_completion_interruptible_timeout(
- ¬if_completion, HZ);
- if (val == 0) {
- result = -ETIMEDOUT;
- usb_kill_urb(¬if_urb); /* Timedout */
- goto error_notif_wait;
- }
- if (val == -ERESTARTSYS) {
- result = -EINTR; /* Interrupted */
- usb_kill_urb(¬if_urb);
- goto error_notif_wait;
- }
- result = notif_urb.status; /* How was the ack? */
- switch (result) {
- case 0:
- break;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* just ignore it */
- case -ESHUTDOWN: /* and exit */
- case -ECONNRESET:
- result = -ESHUTDOWN;
- goto error_dev_gone;
- default: /* any other? */
- usb_kill_urb(¬if_urb); /* Timedout */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
- goto error_exceeded;
- dev_err(dev, "BM-ACK: URB error %d, "
- "retrying\n", notif_urb.status);
- continue; /* retry */
- }
- if (notif_urb.actual_length == 0) {
- d_printf(6, dev, "ZLP received, retrying\n");
- continue;
- }
- /* Got data, append it to the buffer */
- len = min(ack_size - offset, (size_t) notif_urb.actual_length);
- memcpy(ack + offset, i2400m->bm_ack_buf, len);
- offset += len;
- }
- result = offset;
-error_notif_urb_submit:
-error_notif_wait:
-error_dev_gone:
-out:
- if (do_autopm)
- usb_autopm_put_interface(i2400mu->usb_iface);
- d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %ld\n",
- i2400m, ack, ack_size, (long) result);
- usb_put_urb(¬if_urb);
- return result;
-
-error_exceeded:
- dev_err(dev, "bm: maximum errors in notification URB exceeded; "
- "resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- goto out;
-}
diff --git a/drivers/staging/wimax/i2400m/usb-notif.c b/drivers/staging/wimax/i2400m/usb-notif.c
deleted file mode 100644
index 5d429f816125..000000000000
--- a/drivers/staging/wimax/i2400m/usb-notif.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m over USB
- * Notification handling
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- *
- * The notification endpoint is active when the device is not in boot
- * mode; in here we just read and get notifications; based on those,
- * we act to either reinitialize the device after a reboot or to
- * submit a RX request.
- *
- * ROADMAP
- *
- * i2400mu_usb_notification_setup()
- *
- * i2400mu_usb_notification_release()
- *
- * i2400mu_usb_notification_cb() Called when a URB is ready
- * i2400mu_notif_grok()
- * i2400m_is_boot_barker()
- * i2400m_dev_reset_handle()
- * i2400mu_rx_kick()
- */
-#include <linux/usb.h>
-#include <linux/slab.h>
-#include "i2400m-usb.h"
-
-
-#define D_SUBMODULE notif
-#include "usb-debug-levels.h"
-
-
-static const
-__le32 i2400m_ZERO_BARKER[4] = { 0, 0, 0, 0 };
-
-
-/*
- * Process a received notification
- *
- * In normal operation mode, we can only receive two types of payloads
- * on the notification endpoint:
- *
- * - a reboot barker, we do a bootstrap (the device has reseted).
- *
- * - a block of zeroes: there is pending data in the IN endpoint
- */
-static
-int i2400mu_notification_grok(struct i2400mu *i2400mu, const void *buf,
- size_t buf_len)
-{
- int ret;
- struct device *dev = &i2400mu->usb_iface->dev;
- struct i2400m *i2400m = &i2400mu->i2400m;
-
- d_fnstart(4, dev, "(i2400m %p buf %p buf_len %zu)\n",
- i2400mu, buf, buf_len);
- ret = -EIO;
- if (buf_len < sizeof(i2400m_ZERO_BARKER))
- /* Not a bug, just ignore */
- goto error_bad_size;
- ret = 0;
- if (!memcmp(i2400m_ZERO_BARKER, buf, sizeof(i2400m_ZERO_BARKER))) {
- i2400mu_rx_kick(i2400mu);
- goto out;
- }
- ret = i2400m_is_boot_barker(i2400m, buf, buf_len);
- if (unlikely(ret >= 0))
- ret = i2400m_dev_reset_handle(i2400m, "device rebooted");
- else /* Unknown or unexpected data in the notif message */
- i2400m_unknown_barker(i2400m, buf, buf_len);
-error_bad_size:
-out:
- d_fnend(4, dev, "(i2400m %p buf %p buf_len %zu) = %d\n",
- i2400mu, buf, buf_len, ret);
- return ret;
-}
-
-
-/*
- * URB callback for the notification endpoint
- *
- * @urb: the urb received from the notification endpoint
- *
- * This function will just process the USB side of the transaction,
- * checking everything is fine, pass the processing to
- * i2400m_notification_grok() and resubmit the URB.
- */
-static
-void i2400mu_notification_cb(struct urb *urb)
-{
- int ret;
- struct i2400mu *i2400mu = urb->context;
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(4, dev, "(urb %p status %d actual_length %d)\n",
- urb, urb->status, urb->actual_length);
- ret = urb->status;
- switch (ret) {
- case 0:
- ret = i2400mu_notification_grok(i2400mu, urb->transfer_buffer,
- urb->actual_length);
- if (ret == -EIO && edc_inc(&i2400mu->urb_edc, EDC_MAX_ERRORS,
- EDC_ERROR_TIMEFRAME))
- goto error_exceeded;
- if (ret == -ENOMEM) /* uff...power cycle? shutdown? */
- goto error_exceeded;
- break;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* ditto */
- case -ESHUTDOWN: /* URB killed */
- case -ECONNRESET: /* disconnection */
- goto out; /* Notify around */
- default: /* Some error? */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
- goto error_exceeded;
- dev_err(dev, "notification: URB error %d, retrying\n",
- urb->status);
- }
- usb_mark_last_busy(i2400mu->usb_dev);
- ret = usb_submit_urb(i2400mu->notif_urb, GFP_ATOMIC);
- switch (ret) {
- case 0:
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* ditto */
- case -ESHUTDOWN: /* URB killed */
- case -ECONNRESET: /* disconnection */
- break; /* just ignore */
- default: /* Some error? */
- dev_err(dev, "notification: cannot submit URB: %d\n", ret);
- goto error_submit;
- }
- d_fnend(4, dev, "(urb %p status %d actual_length %d) = void\n",
- urb, urb->status, urb->actual_length);
- return;
-
-error_exceeded:
- dev_err(dev, "maximum errors in notification URB exceeded; "
- "resetting device\n");
-error_submit:
- usb_queue_reset_device(i2400mu->usb_iface);
-out:
- d_fnend(4, dev, "(urb %p status %d actual_length %d) = void\n",
- urb, urb->status, urb->actual_length);
-}
-
-
-/*
- * setup the notification endpoint
- *
- * @i2400m: device descriptor
- *
- * This procedure prepares the notification urb and handler for receiving
- * unsolicited barkers from the device.
- */
-int i2400mu_notification_setup(struct i2400mu *i2400mu)
-{
- struct device *dev = &i2400mu->usb_iface->dev;
- int usb_pipe, ret = 0;
- struct usb_endpoint_descriptor *epd;
- char *buf;
-
- d_fnstart(4, dev, "(i2400m %p)\n", i2400mu);
- buf = kmalloc(I2400MU_MAX_NOTIFICATION_LEN, GFP_KERNEL | GFP_DMA);
- if (buf == NULL) {
- ret = -ENOMEM;
- goto error_buf_alloc;
- }
-
- i2400mu->notif_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!i2400mu->notif_urb) {
- ret = -ENOMEM;
- goto error_alloc_urb;
- }
- epd = usb_get_epd(i2400mu->usb_iface,
- i2400mu->endpoint_cfg.notification);
- usb_pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
- usb_fill_int_urb(i2400mu->notif_urb, i2400mu->usb_dev, usb_pipe,
- buf, I2400MU_MAX_NOTIFICATION_LEN,
- i2400mu_notification_cb, i2400mu, epd->bInterval);
- ret = usb_submit_urb(i2400mu->notif_urb, GFP_KERNEL);
- if (ret != 0) {
- dev_err(dev, "notification: cannot submit URB: %d\n", ret);
- goto error_submit;
- }
- d_fnend(4, dev, "(i2400m %p) = %d\n", i2400mu, ret);
- return ret;
-
-error_submit:
- usb_free_urb(i2400mu->notif_urb);
-error_alloc_urb:
- kfree(buf);
-error_buf_alloc:
- d_fnend(4, dev, "(i2400m %p) = %d\n", i2400mu, ret);
- return ret;
-}
-
-
-/*
- * Tear down of the notification mechanism
- *
- * @i2400m: device descriptor
- *
- * Kill the interrupt endpoint urb, free any allocated resources.
- *
- * We need to check if we have done it before as for example,
- * _suspend() call this; if after a suspend() we get a _disconnect()
- * (as the case is when hibernating), nothing bad happens.
- */
-void i2400mu_notification_release(struct i2400mu *i2400mu)
-{
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
- if (i2400mu->notif_urb != NULL) {
- usb_kill_urb(i2400mu->notif_urb);
- kfree(i2400mu->notif_urb->transfer_buffer);
- usb_free_urb(i2400mu->notif_urb);
- i2400mu->notif_urb = NULL;
- }
- d_fnend(4, dev, "(i2400mu %p)\n", i2400mu);
-}
diff --git a/drivers/staging/wimax/i2400m/usb-rx.c b/drivers/staging/wimax/i2400m/usb-rx.c
deleted file mode 100644
index 5b64bda7d9e7..000000000000
--- a/drivers/staging/wimax/i2400m/usb-rx.c
+++ /dev/null
@@ -1,462 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * USB RX handling
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Use skb_clone(), break up processing in chunks
- * - Split transport/device specific
- * - Make buffer size dynamic to exert less memory pressure
- *
- *
- * This handles the RX path on USB.
- *
- * When a notification is received that says 'there is RX data ready',
- * we call i2400mu_rx_kick(); that wakes up the RX kthread, which
- * reads a buffer from USB and passes it to i2400m_rx() in the generic
- * handling code. The RX buffer has an specific format that is
- * described in rx.c.
- *
- * We use a kernel thread in a loop because:
- *
- * - we want to be able to call the USB power management get/put
- * functions (blocking) before each transaction.
- *
- * - We might get a lot of notifications and we don't want to submit
- * a zillion reads; by serializing, we are throttling.
- *
- * - RX data processing can get heavy enough so that it is not
- * appropriate for doing it in the USB callback; thus we run it in a
- * process context.
- *
- * We provide a read buffer of an arbitrary size (short of a page); if
- * the callback reports -EOVERFLOW, it means it was too small, so we
- * just double the size and retry (being careful to append, as
- * sometimes the device provided some data). Every now and then we
- * check if the average packet size is smaller than the current packet
- * size and if so, we halve it. At the end, the size of the
- * preallocated buffer should be following the average received
- * transaction size, adapting dynamically to it.
- *
- * ROADMAP
- *
- * i2400mu_rx_kick() Called from notif.c when we get a
- * 'data ready' notification
- * i2400mu_rxd() Kernel RX daemon
- * i2400mu_rx() Receive USB data
- * i2400m_rx() Send data to generic i2400m RX handling
- *
- * i2400mu_rx_setup() called from i2400mu_bus_dev_start()
- *
- * i2400mu_rx_release() called from i2400mu_bus_dev_stop()
- */
-#include <linux/workqueue.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include "i2400m-usb.h"
-
-
-#define D_SUBMODULE rx
-#include "usb-debug-levels.h"
-
-/*
- * Dynamic RX size
- *
- * We can't let the rx_size be a multiple of 512 bytes (the RX
- * endpoint's max packet size). On some USB host controllers (we
- * haven't been able to fully characterize which), if the device is
- * about to send (for example) X bytes and we only post a buffer to
- * receive n*512, it will fail to mark that as babble (so that
- * i2400mu_rx() [case -EOVERFLOW] can resize the buffer and get the
- * rest).
- *
- * So on growing or shrinking, if it is a multiple of the
- * maxpacketsize, we remove some (instead of incresing some, so in a
- * buddy allocator we try to waste less space).
- *
- * Note we also need a hook for this on i2400mu_rx() -- when we do the
- * first read, we are sure we won't hit this spot because
- * i240mm->rx_size has been set properly. However, if we have to
- * double because of -EOVERFLOW, when we launch the read to get the
- * rest of the data, we *have* to make sure that also is not a
- * multiple of the max_pkt_size.
- */
-
-static
-size_t i2400mu_rx_size_grow(struct i2400mu *i2400mu)
-{
- struct device *dev = &i2400mu->usb_iface->dev;
- size_t rx_size;
- const size_t max_pkt_size = 512;
-
- rx_size = 2 * i2400mu->rx_size;
- if (rx_size % max_pkt_size == 0) {
- rx_size -= 8;
- d_printf(1, dev,
- "RX: expected size grew to %zu [adjusted -8] "
- "from %zu\n",
- rx_size, i2400mu->rx_size);
- } else
- d_printf(1, dev,
- "RX: expected size grew to %zu from %zu\n",
- rx_size, i2400mu->rx_size);
- return rx_size;
-}
-
-
-static
-void i2400mu_rx_size_maybe_shrink(struct i2400mu *i2400mu)
-{
- const size_t max_pkt_size = 512;
- struct device *dev = &i2400mu->usb_iface->dev;
-
- if (unlikely(i2400mu->rx_size_cnt >= 100
- && i2400mu->rx_size_auto_shrink)) {
- size_t avg_rx_size =
- i2400mu->rx_size_acc / i2400mu->rx_size_cnt;
- size_t new_rx_size = i2400mu->rx_size / 2;
- if (avg_rx_size < new_rx_size) {
- if (new_rx_size % max_pkt_size == 0) {
- new_rx_size -= 8;
- d_printf(1, dev,
- "RX: expected size shrank to %zu "
- "[adjusted -8] from %zu\n",
- new_rx_size, i2400mu->rx_size);
- } else
- d_printf(1, dev,
- "RX: expected size shrank to %zu "
- "from %zu\n",
- new_rx_size, i2400mu->rx_size);
- i2400mu->rx_size = new_rx_size;
- i2400mu->rx_size_cnt = 0;
- i2400mu->rx_size_acc = i2400mu->rx_size;
- }
- }
-}
-
-/*
- * Receive a message with payloads from the USB bus into an skb
- *
- * @i2400mu: USB device descriptor
- * @rx_skb: skb where to place the received message
- *
- * Deals with all the USB-specifics of receiving, dynamically
- * increasing the buffer size if so needed. Returns the payload in the
- * skb, ready to process. On a zero-length packet, we retry.
- *
- * On soft USB errors, we retry (until they become too frequent and
- * then are promoted to hard); on hard USB errors, we reset the
- * device. On other errors (skb realloacation, we just drop it and
- * hope for the next invocation to solve it).
- *
- * Returns: pointer to the skb if ok, ERR_PTR on error.
- * NOTE: this function might realloc the skb (if it is too small),
- * so always update with the one returned.
- * ERR_PTR() is < 0 on error.
- * Will return NULL if it cannot reallocate -- this can be
- * considered a transient retryable error.
- */
-static
-struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
-{
- int result = 0;
- struct device *dev = &i2400mu->usb_iface->dev;
- int usb_pipe, read_size, rx_size, do_autopm;
- struct usb_endpoint_descriptor *epd;
- const size_t max_pkt_size = 512;
-
- d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
- do_autopm = atomic_read(&i2400mu->do_autopm);
- result = do_autopm ?
- usb_autopm_get_interface(i2400mu->usb_iface) : 0;
- if (result < 0) {
- dev_err(dev, "RX: can't get autopm: %d\n", result);
- do_autopm = 0;
- }
- epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_in);
- usb_pipe = usb_rcvbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
-retry:
- rx_size = skb_end_pointer(rx_skb) - rx_skb->data - rx_skb->len;
- if (unlikely(rx_size % max_pkt_size == 0)) {
- rx_size -= 8;
- d_printf(1, dev, "RX: rx_size adapted to %d [-8]\n", rx_size);
- }
- result = usb_bulk_msg(
- i2400mu->usb_dev, usb_pipe, rx_skb->data + rx_skb->len,
- rx_size, &read_size, 200);
- usb_mark_last_busy(i2400mu->usb_dev);
- switch (result) {
- case 0:
- if (read_size == 0)
- goto retry; /* ZLP, just resubmit */
- skb_put(rx_skb, read_size);
- break;
- case -EPIPE:
- /*
- * Stall -- maybe the device is choking with our
- * requests. Clear it and give it some time. If they
- * happen to often, it might be another symptom, so we
- * reset.
- *
- * No error handling for usb_clear_halt(0; if it
- * works, the retry works; if it fails, this switch
- * does the error handling for us.
- */
- if (edc_inc(&i2400mu->urb_edc,
- 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "BM-CMD: too many stalls in "
- "URB; resetting device\n");
- goto do_reset;
- }
- usb_clear_halt(i2400mu->usb_dev, usb_pipe);
- msleep(10); /* give the device some time */
- goto retry;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* just ignore it */
- case -ESHUTDOWN:
- case -ECONNRESET:
- break;
- case -EOVERFLOW: { /* too small, reallocate */
- struct sk_buff *new_skb;
- rx_size = i2400mu_rx_size_grow(i2400mu);
- if (rx_size <= (1 << 16)) /* cap it */
- i2400mu->rx_size = rx_size;
- else if (printk_ratelimit()) {
- dev_err(dev, "BUG? rx_size up to %d\n", rx_size);
- result = -EINVAL;
- goto out;
- }
- skb_put(rx_skb, read_size);
- new_skb = skb_copy_expand(rx_skb, 0, rx_size - rx_skb->len,
- GFP_KERNEL);
- if (new_skb == NULL) {
- kfree_skb(rx_skb);
- rx_skb = NULL;
- goto out; /* drop it...*/
- }
- kfree_skb(rx_skb);
- rx_skb = new_skb;
- i2400mu->rx_size_cnt = 0;
- i2400mu->rx_size_acc = i2400mu->rx_size;
- d_printf(1, dev, "RX: size changed to %d, received %d, "
- "copied %d, capacity %ld\n",
- rx_size, read_size, rx_skb->len,
- (long) skb_end_offset(new_skb));
- goto retry;
- }
- /* In most cases, it happens due to the hardware scheduling a
- * read when there was no data - unfortunately, we have no way
- * to tell this timeout from a USB timeout. So we just ignore
- * it. */
- case -ETIMEDOUT:
- dev_err(dev, "RX: timeout: %d\n", result);
- result = 0;
- break;
- default: /* Any error */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
- goto error_reset;
- dev_err(dev, "RX: error receiving URB: %d, retrying\n", result);
- goto retry;
- }
-out:
- if (do_autopm)
- usb_autopm_put_interface(i2400mu->usb_iface);
- d_fnend(4, dev, "(i2400mu %p) = %p\n", i2400mu, rx_skb);
- return rx_skb;
-
-error_reset:
- dev_err(dev, "RX: maximum errors in URB exceeded; "
- "resetting device\n");
-do_reset:
- usb_queue_reset_device(i2400mu->usb_iface);
- rx_skb = ERR_PTR(result);
- goto out;
-}
-
-
-/*
- * Kernel thread for USB reception of data
- *
- * This thread waits for a kick; once kicked, it will allocate an skb
- * and receive a single message to it from USB (using
- * i2400mu_rx()). Once received, it is passed to the generic i2400m RX
- * code for processing.
- *
- * When done processing, it runs some dirty statistics to verify if
- * the last 100 messages received were smaller than half of the
- * current RX buffer size. In that case, the RX buffer size is
- * halved. This will helps lowering the pressure on the memory
- * allocator.
- *
- * Hard errors force the thread to exit.
- */
-static
-int i2400mu_rxd(void *_i2400mu)
-{
- int result = 0;
- struct i2400mu *i2400mu = _i2400mu;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- size_t pending;
- int rx_size;
- struct sk_buff *rx_skb;
- unsigned long flags;
-
- d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- BUG_ON(i2400mu->rx_kthread != NULL);
- i2400mu->rx_kthread = current;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- while (1) {
- d_printf(2, dev, "RX: waiting for messages\n");
- pending = 0;
- wait_event_interruptible(
- i2400mu->rx_wq,
- (kthread_should_stop() /* check this first! */
- || (pending = atomic_read(&i2400mu->rx_pending_count)))
- );
- if (kthread_should_stop())
- break;
- if (pending == 0)
- continue;
- rx_size = i2400mu->rx_size;
- d_printf(2, dev, "RX: reading up to %d bytes\n", rx_size);
- rx_skb = __netdev_alloc_skb(net_dev, rx_size, GFP_KERNEL);
- if (rx_skb == NULL) {
- dev_err(dev, "RX: can't allocate skb [%d bytes]\n",
- rx_size);
- msleep(50); /* give it some time? */
- continue;
- }
-
- /* Receive the message with the payloads */
- rx_skb = i2400mu_rx(i2400mu, rx_skb);
- result = PTR_ERR(rx_skb);
- if (IS_ERR(rx_skb))
- goto out;
- atomic_dec(&i2400mu->rx_pending_count);
- if (rx_skb == NULL || rx_skb->len == 0) {
- /* some "ignorable" condition */
- kfree_skb(rx_skb);
- continue;
- }
-
- /* Deliver the message to the generic i2400m code */
- i2400mu->rx_size_cnt++;
- i2400mu->rx_size_acc += rx_skb->len;
- result = i2400m_rx(i2400m, rx_skb);
- if (result == -EIO
- && edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- goto error_reset;
- }
-
- /* Maybe adjust RX buffer size */
- i2400mu_rx_size_maybe_shrink(i2400mu);
- }
- result = 0;
-out:
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- i2400mu->rx_kthread = NULL;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- d_fnend(4, dev, "(i2400mu %p) = %d\n", i2400mu, result);
- return result;
-
-error_reset:
- dev_err(dev, "RX: maximum errors in received buffer exceeded; "
- "resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- goto out;
-}
-
-
-/*
- * Start reading from the device
- *
- * @i2400m: device instance
- *
- * Notify the RX thread that there is data pending.
- */
-void i2400mu_rx_kick(struct i2400mu *i2400mu)
-{
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(3, dev, "(i2400mu %p)\n", i2400m);
- atomic_inc(&i2400mu->rx_pending_count);
- wake_up_all(&i2400mu->rx_wq);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-
-int i2400mu_rx_setup(struct i2400mu *i2400mu)
-{
- int result = 0;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct task_struct *kthread;
-
- kthread = kthread_run(i2400mu_rxd, i2400mu, "%s-rx",
- wimax_dev->name);
- /* the kthread function sets i2400mu->rx_thread */
- if (IS_ERR(kthread)) {
- result = PTR_ERR(kthread);
- dev_err(dev, "RX: cannot start thread: %d\n", result);
- }
- return result;
-}
-
-
-void i2400mu_rx_release(struct i2400mu *i2400mu)
-{
- unsigned long flags;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = i2400m_dev(i2400m);
- struct task_struct *kthread;
-
- spin_lock_irqsave(&i2400m->rx_lock, flags);
- kthread = i2400mu->rx_kthread;
- i2400mu->rx_kthread = NULL;
- spin_unlock_irqrestore(&i2400m->rx_lock, flags);
- if (kthread)
- kthread_stop(kthread);
- else
- d_printf(1, dev, "RX: kthread had already exited\n");
-}
-
diff --git a/drivers/staging/wimax/i2400m/usb-tx.c b/drivers/staging/wimax/i2400m/usb-tx.c
deleted file mode 100644
index 3ba9d70cca1b..000000000000
--- a/drivers/staging/wimax/i2400m/usb-tx.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * USB specific TX handling
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- * - Initial implementation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Split transport/device specific
- *
- *
- * Takes the TX messages in the i2400m's driver TX FIFO and sends them
- * to the device until there are no more.
- *
- * If we fail sending the message, we just drop it. There isn't much
- * we can do at this point. We could also retry, but the USB stack has
- * already retried and still failed, so there is not much of a
- * point. As well, most of the traffic is network, which has recovery
- * methods for dropped packets.
- *
- * For sending we just obtain a FIFO buffer to send, send it to the
- * USB bulk out, tell the TX FIFO code we have sent it; query for
- * another one, etc... until done.
- *
- * We use a thread so we can call usb_autopm_enable() and
- * usb_autopm_disable() for each transaction; this way when the device
- * goes idle, it will suspend. It also has less overhead than a
- * dedicated workqueue, as it is being used for a single task.
- *
- * ROADMAP
- *
- * i2400mu_tx_setup()
- * i2400mu_tx_release()
- *
- * i2400mu_bus_tx_kick() - Called by the tx.c code when there
- * is new data in the FIFO.
- * i2400mu_txd()
- * i2400m_tx_msg_get()
- * i2400m_tx_msg_sent()
- */
-#include "i2400m-usb.h"
-
-
-#define D_SUBMODULE tx
-#include "usb-debug-levels.h"
-
-
-/*
- * Get the next TX message in the TX FIFO and send it to the device
- *
- * Note that any iteration consumes a message to be sent, no matter if
- * it succeeds or fails (we have no real way to retry or complain).
- *
- * Return: 0 if ok, < 0 errno code on hard error.
- */
-static
-int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
- size_t tx_msg_size)
-{
- int result = 0;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
- int usb_pipe, sent_size, do_autopm;
- struct usb_endpoint_descriptor *epd;
-
- d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
- do_autopm = atomic_read(&i2400mu->do_autopm);
- result = do_autopm ?
- usb_autopm_get_interface(i2400mu->usb_iface) : 0;
- if (result < 0) {
- dev_err(dev, "TX: can't get autopm: %d\n", result);
- do_autopm = 0;
- }
- epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_out);
- usb_pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
-retry:
- result = usb_bulk_msg(i2400mu->usb_dev, usb_pipe,
- tx_msg, tx_msg_size, &sent_size, 200);
- usb_mark_last_busy(i2400mu->usb_dev);
- switch (result) {
- case 0:
- if (sent_size != tx_msg_size) { /* Too short? drop it */
- dev_err(dev, "TX: short write (%d B vs %zu "
- "expected)\n", sent_size, tx_msg_size);
- result = -EIO;
- }
- break;
- case -EPIPE:
- /*
- * Stall -- maybe the device is choking with our
- * requests. Clear it and give it some time. If they
- * happen to often, it might be another symptom, so we
- * reset.
- *
- * No error handling for usb_clear_halt(0; if it
- * works, the retry works; if it fails, this switch
- * does the error handling for us.
- */
- if (edc_inc(&i2400mu->urb_edc,
- 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "BM-CMD: too many stalls in "
- "URB; resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- } else {
- usb_clear_halt(i2400mu->usb_dev, usb_pipe);
- msleep(10); /* give the device some time */
- goto retry;
- }
- fallthrough;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* just ignore it */
- case -ESHUTDOWN: /* and exit */
- case -ECONNRESET:
- result = -ESHUTDOWN;
- break;
- default: /* Some error? */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "TX: maximum errors in URB "
- "exceeded; resetting device\n");
- usb_queue_reset_device(i2400mu->usb_iface);
- } else {
- dev_err(dev, "TX: cannot send URB; retrying. "
- "tx_msg @%zu %zu B [%d sent]: %d\n",
- (void *) tx_msg - i2400m->tx_buf,
- tx_msg_size, sent_size, result);
- goto retry;
- }
- }
- if (do_autopm)
- usb_autopm_put_interface(i2400mu->usb_iface);
- d_fnend(4, dev, "(i2400mu %p) = result\n", i2400mu);
- return result;
-}
-
-
-/*
- * Get the next TX message in the TX FIFO and send it to the device
- *
- * Note we exit the loop if i2400mu_tx() fails; that function only
- * fails on hard error (failing to tx a buffer not being one of them,
- * see its doc).
- *
- * Return: 0
- */
-static
-int i2400mu_txd(void *_i2400mu)
-{
- struct i2400mu *i2400mu = _i2400mu;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
- struct i2400m_msg_hdr *tx_msg;
- size_t tx_msg_size;
- unsigned long flags;
-
- d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- BUG_ON(i2400mu->tx_kthread != NULL);
- i2400mu->tx_kthread = current;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- while (1) {
- d_printf(2, dev, "TX: waiting for messages\n");
- tx_msg = NULL;
- wait_event_interruptible(
- i2400mu->tx_wq,
- (kthread_should_stop() /* check this first! */
- || (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size)))
- );
- if (kthread_should_stop())
- break;
- WARN_ON(tx_msg == NULL); /* should not happen...*/
- d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
- d_dump(5, dev, tx_msg, tx_msg_size);
- /* Yeah, we ignore errors ... not much we can do */
- i2400mu_tx(i2400mu, tx_msg, tx_msg_size);
- i2400m_tx_msg_sent(i2400m); /* ack it, advance the FIFO */
- }
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- i2400mu->tx_kthread = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- d_fnend(4, dev, "(i2400mu %p)\n", i2400mu);
- return 0;
-}
-
-
-/*
- * i2400m TX engine notifies us that there is data in the FIFO ready
- * for TX
- *
- * If there is a URB in flight, don't do anything; when it finishes,
- * it will see there is data in the FIFO and send it. Else, just
- * submit a write.
- */
-void i2400mu_bus_tx_kick(struct i2400m *i2400m)
-{
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
- wake_up_all(&i2400mu->tx_wq);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-
-int i2400mu_tx_setup(struct i2400mu *i2400mu)
-{
- int result = 0;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = &i2400mu->usb_iface->dev;
- struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
- struct task_struct *kthread;
-
- kthread = kthread_run(i2400mu_txd, i2400mu, "%s-tx",
- wimax_dev->name);
- /* the kthread function sets i2400mu->tx_thread */
- if (IS_ERR(kthread)) {
- result = PTR_ERR(kthread);
- dev_err(dev, "TX: cannot start thread: %d\n", result);
- }
- return result;
-}
-
-void i2400mu_tx_release(struct i2400mu *i2400mu)
-{
- unsigned long flags;
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct device *dev = i2400m_dev(i2400m);
- struct task_struct *kthread;
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- kthread = i2400mu->tx_kthread;
- i2400mu->tx_kthread = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- if (kthread)
- kthread_stop(kthread);
- else
- d_printf(1, dev, "TX: kthread had already exited\n");
-}
diff --git a/drivers/staging/wimax/i2400m/usb.c b/drivers/staging/wimax/i2400m/usb.c
deleted file mode 100644
index 481b1ccde983..000000000000
--- a/drivers/staging/wimax/i2400m/usb.c
+++ /dev/null
@@ -1,765 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Linux driver model glue for USB device, reset & fw upload
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * Yanir Lubetkin <yanirx.lubetkin@...el.com>
- *
- * See i2400m-usb.h for a general description of this driver.
- *
- * This file implements driver model glue, and hook ups for the
- * generic driver to implement the bus-specific functions (device
- * communication setup/tear down, firmware upload and resetting).
- *
- * ROADMAP
- *
- * i2400mu_probe()
- * alloc_netdev()...
- * i2400mu_netdev_setup()
- * i2400mu_init()
- * i2400m_netdev_setup()
- * i2400m_setup()...
- *
- * i2400mu_disconnect
- * i2400m_release()
- * free_netdev()
- *
- * i2400mu_suspend()
- * i2400m_cmd_enter_powersave()
- * i2400mu_notification_release()
- *
- * i2400mu_resume()
- * i2400mu_notification_setup()
- *
- * i2400mu_bus_dev_start() Called by i2400m_dev_start() [who is
- * i2400mu_tx_setup() called by i2400m_setup()]
- * i2400mu_rx_setup()
- * i2400mu_notification_setup()
- *
- * i2400mu_bus_dev_stop() Called by i2400m_dev_stop() [who is
- * i2400mu_notification_release() called by i2400m_release()]
- * i2400mu_rx_release()
- * i2400mu_tx_release()
- *
- * i2400mu_bus_reset() Called by i2400m_reset
- * __i2400mu_reset()
- * __i2400mu_send_barker()
- * usb_reset_device()
- */
-#include "i2400m-usb.h"
-#include "linux-wimax-i2400m.h"
-#include <linux/debugfs.h>
-#include <linux/ethtool.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-
-
-#define D_SUBMODULE usb
-#include "usb-debug-levels.h"
-
-static char i2400mu_debug_params[128];
-module_param_string(debug, i2400mu_debug_params, sizeof(i2400mu_debug_params),
- 0644);
-MODULE_PARM_DESC(debug,
- "String of space-separated NAME:VALUE pairs, where NAMEs "
- "are the different debug submodules and VALUE are the "
- "initial debug value to set.");
-
-/* Our firmware file name */
-static const char *i2400mu_bus_fw_names_5x50[] = {
-#define I2400MU_FW_FILE_NAME_v1_5 "i2400m-fw-usb-1.5.sbcf"
- I2400MU_FW_FILE_NAME_v1_5,
-#define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf"
- I2400MU_FW_FILE_NAME_v1_4,
- NULL,
-};
-
-
-static const char *i2400mu_bus_fw_names_6050[] = {
-#define I6050U_FW_FILE_NAME_v1_5 "i6050-fw-usb-1.5.sbcf"
- I6050U_FW_FILE_NAME_v1_5,
- NULL,
-};
-
-
-static
-int i2400mu_bus_dev_start(struct i2400m *i2400m)
-{
- int result;
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- result = i2400mu_tx_setup(i2400mu);
- if (result < 0)
- goto error_usb_tx_setup;
- result = i2400mu_rx_setup(i2400mu);
- if (result < 0)
- goto error_usb_rx_setup;
- result = i2400mu_notification_setup(i2400mu);
- if (result < 0)
- goto error_notif_setup;
- d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
- return result;
-
-error_notif_setup:
- i2400mu_rx_release(i2400mu);
-error_usb_rx_setup:
- i2400mu_tx_release(i2400mu);
-error_usb_tx_setup:
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
- return result;
-}
-
-
-static
-void i2400mu_bus_dev_stop(struct i2400m *i2400m)
-{
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- struct device *dev = &i2400mu->usb_iface->dev;
-
- d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
- i2400mu_notification_release(i2400mu);
- i2400mu_rx_release(i2400mu);
- i2400mu_tx_release(i2400mu);
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-
-/*
- * Sends a barker buffer to the device
- *
- * This helper will allocate a kmalloced buffer and use it to transmit
- * (then free it). Reason for this is that other arches cannot use
- * stack/vmalloc/text areas for DMA transfers.
- *
- * Error recovery here is simpler: anything is considered a hard error
- * and will move the reset code to use a last-resort bus-based reset.
- */
-static
-int __i2400mu_send_barker(struct i2400mu *i2400mu,
- const __le32 *barker,
- size_t barker_size,
- unsigned endpoint)
-{
- struct usb_endpoint_descriptor *epd = NULL;
- int pipe, actual_len, ret;
- struct device *dev = &i2400mu->usb_iface->dev;
- void *buffer;
- int do_autopm = 1;
-
- ret = usb_autopm_get_interface(i2400mu->usb_iface);
- if (ret < 0) {
- dev_err(dev, "RESET: can't get autopm: %d\n", ret);
- do_autopm = 0;
- }
- ret = -ENOMEM;
- buffer = kmalloc(barker_size, GFP_KERNEL);
- if (buffer == NULL)
- goto error_kzalloc;
- epd = usb_get_epd(i2400mu->usb_iface, endpoint);
- pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
- memcpy(buffer, barker, barker_size);
-retry:
- ret = usb_bulk_msg(i2400mu->usb_dev, pipe, buffer, barker_size,
- &actual_len, 200);
- switch (ret) {
- case 0:
- if (actual_len != barker_size) { /* Too short? drop it */
- dev_err(dev, "E: %s: short write (%d B vs %zu "
- "expected)\n",
- __func__, actual_len, barker_size);
- ret = -EIO;
- }
- break;
- case -EPIPE:
- /*
- * Stall -- maybe the device is choking with our
- * requests. Clear it and give it some time. If they
- * happen to often, it might be another symptom, so we
- * reset.
- *
- * No error handling for usb_clear_halt(0; if it
- * works, the retry works; if it fails, this switch
- * does the error handling for us.
- */
- if (edc_inc(&i2400mu->urb_edc,
- 10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "E: %s: too many stalls in "
- "URB; resetting device\n", __func__);
- usb_queue_reset_device(i2400mu->usb_iface);
- /* fallthrough */
- } else {
- usb_clear_halt(i2400mu->usb_dev, pipe);
- msleep(10); /* give the device some time */
- goto retry;
- }
- fallthrough;
- case -EINVAL: /* while removing driver */
- case -ENODEV: /* dev disconnect ... */
- case -ENOENT: /* just ignore it */
- case -ESHUTDOWN: /* and exit */
- case -ECONNRESET:
- ret = -ESHUTDOWN;
- break;
- default: /* Some error? */
- if (edc_inc(&i2400mu->urb_edc,
- EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
- dev_err(dev, "E: %s: maximum errors in URB "
- "exceeded; resetting device\n",
- __func__);
- usb_queue_reset_device(i2400mu->usb_iface);
- } else {
- dev_warn(dev, "W: %s: cannot send URB: %d\n",
- __func__, ret);
- goto retry;
- }
- }
- kfree(buffer);
-error_kzalloc:
- if (do_autopm)
- usb_autopm_put_interface(i2400mu->usb_iface);
- return ret;
-}
-
-
-/*
- * Reset a device at different levels (warm, cold or bus)
- *
- * @i2400m: device descriptor
- * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
- *
- * Warm and cold resets get a USB reset if they fail.
- *
- * Warm reset:
- *
- * The device will be fully reset internally, but won't be
- * disconnected from the USB bus (so no reenumeration will
- * happen). Firmware upload will be necessary.
- *
- * The device will send a reboot barker in the notification endpoint
- * that will trigger the driver to reinitialize the state
- * automatically from notif.c:i2400m_notification_grok() into
- * i2400m_dev_bootstrap_delayed().
- *
- * Cold and bus (USB) reset:
- *
- * The device will be fully reset internally, disconnected from the
- * USB bus an a reenumeration will happen. Firmware upload will be
- * necessary. Thus, we don't do any locking or struct
- * reinitialization, as we are going to be fully disconnected and
- * reenumerated.
- *
- * Note we need to return -ENODEV if a warm reset was requested and we
- * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
- * and wimax_dev->op_reset.
- *
- * WARNING: no driver state saved/fixed
- */
-static
-int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
-{
- int result;
- struct i2400mu *i2400mu =
- container_of(i2400m, struct i2400mu, i2400m);
- struct device *dev = i2400m_dev(i2400m);
- static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
- cpu_to_le32(I2400M_WARM_RESET_BARKER),
- cpu_to_le32(I2400M_WARM_RESET_BARKER),
- cpu_to_le32(I2400M_WARM_RESET_BARKER),
- cpu_to_le32(I2400M_WARM_RESET_BARKER),
- };
- static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
- cpu_to_le32(I2400M_COLD_RESET_BARKER),
- cpu_to_le32(I2400M_COLD_RESET_BARKER),
- cpu_to_le32(I2400M_COLD_RESET_BARKER),
- cpu_to_le32(I2400M_COLD_RESET_BARKER),
- };
-
- d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
- if (rt == I2400M_RT_WARM)
- result = __i2400mu_send_barker(
- i2400mu, i2400m_WARM_BOOT_BARKER,
- sizeof(i2400m_WARM_BOOT_BARKER),
- i2400mu->endpoint_cfg.bulk_out);
- else if (rt == I2400M_RT_COLD)
- result = __i2400mu_send_barker(
- i2400mu, i2400m_COLD_BOOT_BARKER,
- sizeof(i2400m_COLD_BOOT_BARKER),
- i2400mu->endpoint_cfg.reset_cold);
- else if (rt == I2400M_RT_BUS) {
- result = usb_reset_device(i2400mu->usb_dev);
- switch (result) {
- case 0:
- case -EINVAL: /* device is gone */
- case -ENODEV:
- case -ENOENT:
- case -ESHUTDOWN:
- result = 0;
- break; /* We assume the device is disconnected */
- default:
- dev_err(dev, "USB reset failed (%d), giving up!\n",
- result);
- }
- } else {
- result = -EINVAL; /* shut gcc up in certain arches */
- BUG();
- }
- if (result < 0
- && result != -EINVAL /* device is gone */
- && rt != I2400M_RT_BUS) {
- /*
- * Things failed -- resort to lower level reset, that
- * we queue in another context; the reason for this is
- * that the pre and post reset functionality requires
- * the i2400m->init_mutex; RT_WARM and RT_COLD can
- * come from areas where i2400m->init_mutex is taken.
- */
- dev_err(dev, "%s reset failed (%d); trying USB reset\n",
- rt == I2400M_RT_WARM ? "warm" : "cold", result);
- usb_queue_reset_device(i2400mu->usb_iface);
- result = -ENODEV;
- }
- d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
- return result;
-}
-
-static void i2400mu_get_drvinfo(struct net_device *net_dev,
- struct ethtool_drvinfo *info)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- struct usb_device *udev = i2400mu->usb_dev;
-
- strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
- strscpy(info->fw_version, i2400m->fw_name ? : "",
- sizeof(info->fw_version));
- usb_make_path(udev, info->bus_info, sizeof(info->bus_info));
-}
-
-static const struct ethtool_ops i2400mu_ethtool_ops = {
- .get_drvinfo = i2400mu_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-static
-void i2400mu_netdev_setup(struct net_device *net_dev)
-{
- struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
- struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- i2400mu_init(i2400mu);
- i2400m_netdev_setup(net_dev);
- net_dev->ethtool_ops = &i2400mu_ethtool_ops;
-}
-
-
-/*
- * Debug levels control; see debug.h
- */
-struct d_level D_LEVEL[] = {
- D_SUBMODULE_DEFINE(usb),
- D_SUBMODULE_DEFINE(fw),
- D_SUBMODULE_DEFINE(notif),
- D_SUBMODULE_DEFINE(rx),
- D_SUBMODULE_DEFINE(tx),
-};
-size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
-
-static
-void i2400mu_debugfs_add(struct i2400mu *i2400mu)
-{
- struct dentry *dentry = i2400mu->i2400m.wimax_dev.debugfs_dentry;
-
- dentry = debugfs_create_dir("i2400m-usb", dentry);
- i2400mu->debugfs_dentry = dentry;
-
- d_level_register_debugfs("dl_", usb, dentry);
- d_level_register_debugfs("dl_", fw, dentry);
- d_level_register_debugfs("dl_", notif, dentry);
- d_level_register_debugfs("dl_", rx, dentry);
- d_level_register_debugfs("dl_", tx, dentry);
-
- /* Don't touch these if you don't know what you are doing */
- debugfs_create_u8("rx_size_auto_shrink", 0600, dentry,
- &i2400mu->rx_size_auto_shrink);
-
- debugfs_create_size_t("rx_size", 0600, dentry, &i2400mu->rx_size);
-}
-
-
-static struct device_type i2400mu_type = {
- .name = "wimax",
-};
-
-/*
- * Probe a i2400m interface and register it
- *
- * @iface: USB interface to link to
- * @id: USB class/subclass/protocol id
- * @returns: 0 if ok, < 0 errno code on error.
- *
- * Alloc a net device, initialize the bus-specific details and then
- * calls the bus-generic initialization routine. That will register
- * the wimax and netdev devices, upload the firmware [using
- * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
- * communication with the device and then will start to talk to it to
- * finnish setting it up.
- */
-static
-int i2400mu_probe(struct usb_interface *iface,
- const struct usb_device_id *id)
-{
- int result;
- struct net_device *net_dev;
- struct device *dev = &iface->dev;
- struct i2400m *i2400m;
- struct i2400mu *i2400mu;
- struct usb_device *usb_dev = interface_to_usbdev(iface);
-
- if (iface->cur_altsetting->desc.bNumEndpoints < 4)
- return -ENODEV;
-
- if (usb_dev->speed != USB_SPEED_HIGH)
- dev_err(dev, "device not connected as high speed\n");
-
- /* Allocate instance [calls i2400m_netdev_setup() on it]. */
- result = -ENOMEM;
- net_dev = alloc_netdev(sizeof(*i2400mu), "wmx%d", NET_NAME_UNKNOWN,
- i2400mu_netdev_setup);
- if (net_dev == NULL) {
- dev_err(dev, "no memory for network device instance\n");
- goto error_alloc_netdev;
- }
- SET_NETDEV_DEV(net_dev, dev);
- SET_NETDEV_DEVTYPE(net_dev, &i2400mu_type);
- i2400m = net_dev_to_i2400m(net_dev);
- i2400mu = container_of(i2400m, struct i2400mu, i2400m);
- i2400m->wimax_dev.net_dev = net_dev;
- i2400mu->usb_dev = usb_get_dev(usb_dev);
- i2400mu->usb_iface = iface;
- usb_set_intfdata(iface, i2400mu);
-
- i2400m->bus_tx_block_size = I2400MU_BLK_SIZE;
- /*
- * Room required in the Tx queue for USB message to accommodate
- * a smallest payload while allocating header space is 16 bytes.
- * Adding this room for the new tx message increases the
- * possibilities of including any payload with size <= 16 bytes.
- */
- i2400m->bus_tx_room_min = I2400MU_BLK_SIZE;
- i2400m->bus_pl_size_max = I2400MU_PL_SIZE_MAX;
- i2400m->bus_setup = NULL;
- i2400m->bus_dev_start = i2400mu_bus_dev_start;
- i2400m->bus_dev_stop = i2400mu_bus_dev_stop;
- i2400m->bus_release = NULL;
- i2400m->bus_tx_kick = i2400mu_bus_tx_kick;
- i2400m->bus_reset = i2400mu_bus_reset;
- i2400m->bus_bm_retries = I2400M_USB_BOOT_RETRIES;
- i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send;
- i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack;
- i2400m->bus_bm_mac_addr_impaired = 0;
-
- switch (id->idProduct) {
- case USB_DEVICE_ID_I6050:
- case USB_DEVICE_ID_I6050_2:
- case USB_DEVICE_ID_I6150:
- case USB_DEVICE_ID_I6150_2:
- case USB_DEVICE_ID_I6150_3:
- case USB_DEVICE_ID_I6250:
- i2400mu->i6050 = 1;
- break;
- default:
- break;
- }
-
- if (i2400mu->i6050) {
- i2400m->bus_fw_names = i2400mu_bus_fw_names_6050;
- i2400mu->endpoint_cfg.bulk_out = 0;
- i2400mu->endpoint_cfg.notification = 3;
- i2400mu->endpoint_cfg.reset_cold = 2;
- i2400mu->endpoint_cfg.bulk_in = 1;
- } else {
- i2400m->bus_fw_names = i2400mu_bus_fw_names_5x50;
- i2400mu->endpoint_cfg.bulk_out = 0;
- i2400mu->endpoint_cfg.notification = 1;
- i2400mu->endpoint_cfg.reset_cold = 2;
- i2400mu->endpoint_cfg.bulk_in = 3;
- }
-#ifdef CONFIG_PM
- iface->needs_remote_wakeup = 1; /* autosuspend (15s delay) */
- device_init_wakeup(dev, 1);
- pm_runtime_set_autosuspend_delay(&usb_dev->dev, 15000);
- usb_enable_autosuspend(usb_dev);
-#endif
-
- result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT);
- if (result < 0) {
- dev_err(dev, "cannot setup device: %d\n", result);
- goto error_setup;
- }
- i2400mu_debugfs_add(i2400mu);
- return 0;
-
-error_setup:
- usb_set_intfdata(iface, NULL);
- usb_put_dev(i2400mu->usb_dev);
- free_netdev(net_dev);
-error_alloc_netdev:
- return result;
-}
-
-
-/*
- * Disconnect a i2400m from the system.
- *
- * i2400m_stop() has been called before, so al the rx and tx contexts
- * have been taken down already. Make sure the queue is stopped,
- * unregister netdev and i2400m, free and kill.
- */
-static
-void i2400mu_disconnect(struct usb_interface *iface)
-{
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- struct i2400m *i2400m = &i2400mu->i2400m;
- struct net_device *net_dev = i2400m->wimax_dev.net_dev;
- struct device *dev = &iface->dev;
-
- d_fnstart(3, dev, "(iface %p i2400m %p)\n", iface, i2400m);
-
- debugfs_remove_recursive(i2400mu->debugfs_dentry);
- i2400m_release(i2400m);
- usb_set_intfdata(iface, NULL);
- usb_put_dev(i2400mu->usb_dev);
- free_netdev(net_dev);
- d_fnend(3, dev, "(iface %p i2400m %p) = void\n", iface, i2400m);
-}
-
-
-/*
- * Get the device ready for USB port or system standby and hibernation
- *
- * USB port and system standby are handled the same.
- *
- * When the system hibernates, the USB device is powered down and then
- * up, so we don't really have to do much here, as it will be seen as
- * a reconnect. Still for simplicity we consider this case the same as
- * suspend, so that the device has a chance to do notify the base
- * station (if connected).
- *
- * So at the end, the three cases require common handling.
- *
- * If at the time of this call the device's firmware is not loaded,
- * nothing has to be done. Note we can be "loose" about not reading
- * i2400m->updown under i2400m->init_mutex. If it happens to change
- * inmediately, other parts of the call flow will fail and effectively
- * catch it.
- *
- * If the firmware is loaded, we need to:
- *
- * - tell the device to go into host interface power save mode, wait
- * for it to ack
- *
- * This is quite more interesting than it is; we need to execute a
- * command, but this time, we don't want the code in usb-{tx,rx}.c
- * to call the usb_autopm_get/put_interface() barriers as it'd
- * deadlock, so we need to decrement i2400mu->do_autopm, that acts
- * as a poor man's semaphore. Ugly, but it works.
- *
- * As well, the device might refuse going to sleep for whichever
- * reason. In this case we just fail. For system suspend/hibernate,
- * we *can't* fail. We check PMSG_IS_AUTO to see if the
- * suspend call comes from the USB stack or from the system and act
- * in consequence.
- *
- * - stop the notification endpoint polling
- */
-static
-int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
-{
- int result = 0;
- struct device *dev = &iface->dev;
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- unsigned is_autosuspend = 0;
- struct i2400m *i2400m = &i2400mu->i2400m;
-
-#ifdef CONFIG_PM
- if (PMSG_IS_AUTO(pm_msg))
- is_autosuspend = 1;
-#endif
-
- d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event);
- rmb(); /* see i2400m->updown's documentation */
- if (i2400m->updown == 0)
- goto no_firmware;
- if (i2400m->state == I2400M_SS_DATA_PATH_CONNECTED && is_autosuspend) {
- /* ugh -- the device is connected and this suspend
- * request is an autosuspend one (not a system standby
- * / hibernate).
- *
- * The only way the device can go to standby is if the
- * link with the base station is in IDLE mode; that
- * were the case, we'd be in status
- * I2400M_SS_CONNECTED_IDLE. But we are not.
- *
- * If we *tell* him to go power save now, it'll reset
- * as a precautionary measure, so if this is an
- * autosuspend thing, say no and it'll come back
- * later, when the link is IDLE
- */
- result = -EBADF;
- d_printf(1, dev, "fw up, link up, not-idle, autosuspend: "
- "not entering powersave\n");
- goto error_not_now;
- }
- d_printf(1, dev, "fw up: entering powersave\n");
- atomic_dec(&i2400mu->do_autopm);
- result = i2400m_cmd_enter_powersave(i2400m);
- atomic_inc(&i2400mu->do_autopm);
- if (result < 0 && !is_autosuspend) {
- /* System suspend, can't fail */
- dev_err(dev, "failed to suspend, will reset on resume\n");
- result = 0;
- }
- if (result < 0)
- goto error_enter_powersave;
- i2400mu_notification_release(i2400mu);
- d_printf(1, dev, "powersave requested\n");
-error_enter_powersave:
-error_not_now:
-no_firmware:
- d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n",
- iface, pm_msg.event, result);
- return result;
-}
-
-
-static
-int i2400mu_resume(struct usb_interface *iface)
-{
- int ret = 0;
- struct device *dev = &iface->dev;
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- struct i2400m *i2400m = &i2400mu->i2400m;
-
- d_fnstart(3, dev, "(iface %p)\n", iface);
- rmb(); /* see i2400m->updown's documentation */
- if (i2400m->updown == 0) {
- d_printf(1, dev, "fw was down, no resume needed\n");
- goto out;
- }
- d_printf(1, dev, "fw was up, resuming\n");
- i2400mu_notification_setup(i2400mu);
- /* USB has flow control, so we don't need to give it time to
- * come back; otherwise, we'd use something like a get-state
- * command... */
-out:
- d_fnend(3, dev, "(iface %p) = %d\n", iface, ret);
- return ret;
-}
-
-
-static
-int i2400mu_reset_resume(struct usb_interface *iface)
-{
- int result;
- struct device *dev = &iface->dev;
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- struct i2400m *i2400m = &i2400mu->i2400m;
-
- d_fnstart(3, dev, "(iface %p)\n", iface);
- result = i2400m_dev_reset_handle(i2400m, "device reset on resume");
- d_fnend(3, dev, "(iface %p) = %d\n", iface, result);
- return result < 0 ? result : 0;
-}
-
-
-/*
- * Another driver or user space is triggering a reset on the device
- * which contains the interface passed as an argument. Cease IO and
- * save any device state you need to restore.
- *
- * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if
- * you are in atomic context.
- */
-static
-int i2400mu_pre_reset(struct usb_interface *iface)
-{
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- return i2400m_pre_reset(&i2400mu->i2400m);
-}
-
-
-/*
- * The reset has completed. Restore any saved device state and begin
- * using the device again.
- *
- * If you need to allocate memory here, use GFP_NOIO or GFP_ATOMIC, if
- * you are in atomic context.
- */
-static
-int i2400mu_post_reset(struct usb_interface *iface)
-{
- struct i2400mu *i2400mu = usb_get_intfdata(iface);
- return i2400m_post_reset(&i2400mu->i2400m);
-}
-
-
-static
-struct usb_device_id i2400mu_id_table[] = {
- { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050) },
- { USB_DEVICE(0x8086, USB_DEVICE_ID_I6050_2) },
- { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150) },
- { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_2) },
- { USB_DEVICE(0x8087, USB_DEVICE_ID_I6150_3) },
- { USB_DEVICE(0x8086, USB_DEVICE_ID_I6250) },
- { USB_DEVICE(0x8086, 0x0181) },
- { USB_DEVICE(0x8086, 0x1403) },
- { USB_DEVICE(0x8086, 0x1405) },
- { USB_DEVICE(0x8086, 0x0180) },
- { USB_DEVICE(0x8086, 0x0182) },
- { USB_DEVICE(0x8086, 0x1406) },
- { USB_DEVICE(0x8086, 0x1403) },
- { },
-};
-MODULE_DEVICE_TABLE(usb, i2400mu_id_table);
-
-
-static
-struct usb_driver i2400mu_driver = {
- .name = KBUILD_MODNAME,
- .suspend = i2400mu_suspend,
- .resume = i2400mu_resume,
- .reset_resume = i2400mu_reset_resume,
- .probe = i2400mu_probe,
- .disconnect = i2400mu_disconnect,
- .pre_reset = i2400mu_pre_reset,
- .post_reset = i2400mu_post_reset,
- .id_table = i2400mu_id_table,
- .supports_autosuspend = 1,
-};
-
-static
-int __init i2400mu_driver_init(void)
-{
- d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400mu_debug_params,
- "i2400m_usb.debug");
- return usb_register(&i2400mu_driver);
-}
-module_init(i2400mu_driver_init);
-
-
-static
-void __exit i2400mu_driver_exit(void)
-{
- usb_deregister(&i2400mu_driver);
-}
-module_exit(i2400mu_driver_exit);
-
-MODULE_AUTHOR("Intel Corporation <linux-wimax@...el.com>");
-MODULE_DESCRIPTION("Driver for USB based Intel Wireless WiMAX Connection 2400M "
- "(5x50 & 6050)");
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_5);
-MODULE_FIRMWARE(I6050U_FW_FILE_NAME_v1_5);
diff --git a/drivers/staging/wimax/id-table.c b/drivers/staging/wimax/id-table.c
deleted file mode 100644
index 0e6f4aa87bc9..000000000000
--- a/drivers/staging/wimax/id-table.c
+++ /dev/null
@@ -1,130 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Mappping of generic netlink family IDs to net devices
- *
- * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * We assign a single generic netlink family ID to each device (to
- * simplify lookup).
- *
- * We need a way to map family ID to a wimax_dev pointer.
- *
- * The idea is to use a very simple lookup. Using a netlink attribute
- * with (for example) the interface name implies a heavier search over
- * all the network devices; seemed kind of a waste given that we know
- * we are looking for a WiMAX device and that most systems will have
- * just a single WiMAX adapter.
- *
- * We put all the WiMAX devices in the system in a linked list and
- * match the generic link family ID against the list.
- *
- * By using a linked list, the case of a single adapter in the system
- * becomes (almost) no overhead, while still working for many more. If
- * it ever goes beyond two, I'll be surprised.
- */
-#include <linux/device.h>
-#include <net/genetlink.h>
-#include <linux/netdevice.h>
-#include <linux/list.h>
-#include "linux-wimax.h"
-#include "wimax-internal.h"
-
-
-#define D_SUBMODULE id_table
-#include "debug-levels.h"
-
-
-static DEFINE_SPINLOCK(wimax_id_table_lock);
-static struct list_head wimax_id_table = LIST_HEAD_INIT(wimax_id_table);
-
-
-/*
- * wimax_id_table_add - add a gennetlink familiy ID / wimax_dev mapping
- *
- * @wimax_dev: WiMAX device descriptor to associate to the Generic
- * Netlink family ID.
- *
- * Look for an empty spot in the ID table; if none found, double the
- * table's size and get the first spot.
- */
-void wimax_id_table_add(struct wimax_dev *wimax_dev)
-{
- d_fnstart(3, NULL, "(wimax_dev %p)\n", wimax_dev);
- spin_lock(&wimax_id_table_lock);
- list_add(&wimax_dev->id_table_node, &wimax_id_table);
- spin_unlock(&wimax_id_table_lock);
- d_fnend(3, NULL, "(wimax_dev %p)\n", wimax_dev);
-}
-
-
-/*
- * wimax_get_netdev_by_info - lookup a wimax_dev from the gennetlink info
- *
- * The generic netlink family ID has been filled out in the
- * nlmsghdr->nlmsg_type field, so we pull it from there, look it up in
- * the mapping table and reference the wimax_dev.
- *
- * When done, the reference should be dropped with
- * 'dev_put(wimax_dev->net_dev)'.
- */
-struct wimax_dev *wimax_dev_get_by_genl_info(
- struct genl_info *info, int ifindex)
-{
- struct wimax_dev *wimax_dev = NULL;
-
- d_fnstart(3, NULL, "(info %p ifindex %d)\n", info, ifindex);
- spin_lock(&wimax_id_table_lock);
- list_for_each_entry(wimax_dev, &wimax_id_table, id_table_node) {
- if (wimax_dev->net_dev->ifindex == ifindex) {
- dev_hold(wimax_dev->net_dev);
- goto found;
- }
- }
- wimax_dev = NULL;
- d_printf(1, NULL, "wimax: no devices found with ifindex %d\n",
- ifindex);
-found:
- spin_unlock(&wimax_id_table_lock);
- d_fnend(3, NULL, "(info %p ifindex %d) = %p\n",
- info, ifindex, wimax_dev);
- return wimax_dev;
-}
-
-
-/*
- * wimax_id_table_rm - Remove a gennetlink familiy ID / wimax_dev mapping
- *
- * @id: family ID to remove from the table
- */
-void wimax_id_table_rm(struct wimax_dev *wimax_dev)
-{
- spin_lock(&wimax_id_table_lock);
- list_del_init(&wimax_dev->id_table_node);
- spin_unlock(&wimax_id_table_lock);
-}
-
-
-/*
- * Release the gennetlink family id / mapping table
- *
- * On debug, verify that the table is empty upon removal. We want the
- * code always compiled, to ensure it doesn't bit rot. It will be
- * compiled out if CONFIG_BUG is disabled.
- */
-void wimax_id_table_release(void)
-{
- struct wimax_dev *wimax_dev;
-
-#ifndef CONFIG_BUG
- return;
-#endif
- spin_lock(&wimax_id_table_lock);
- list_for_each_entry(wimax_dev, &wimax_id_table, id_table_node) {
- pr_err("BUG: %s wimax_dev %p ifindex %d not cleared\n",
- __func__, wimax_dev, wimax_dev->net_dev->ifindex);
- WARN_ON(1);
- }
- spin_unlock(&wimax_id_table_lock);
-}
diff --git a/drivers/staging/wimax/linux-wimax-debug.h b/drivers/staging/wimax/linux-wimax-debug.h
deleted file mode 100644
index 5b5ec405143b..000000000000
--- a/drivers/staging/wimax/linux-wimax-debug.h
+++ /dev/null
@@ -1,491 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Linux WiMAX
- * Collection of tools to manage debug operations.
- *
- * Copyright (C) 2005-2007 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * Don't #include this file directly, read on!
- *
- * EXECUTING DEBUGGING ACTIONS OR NOT
- *
- * The main thing this framework provides is decission power to take a
- * debug action (like printing a message) if the current debug level
- * allows it.
- *
- * The decission power is at two levels: at compile-time (what does
- * not make it is compiled out) and at run-time. The run-time
- * selection is done per-submodule (as they are declared by the user
- * of the framework).
- *
- * A call to d_test(L) (L being the target debug level) returns true
- * if the action should be taken because the current debug levels
- * allow it (both compile and run time).
- *
- * It follows that a call to d_test() that can be determined to be
- * always false at compile time will get the code depending on it
- * compiled out by optimization.
- *
- * DEBUG LEVELS
- *
- * It is up to the caller to define how much a debugging level is.
- *
- * Convention sets 0 as "no debug" (so an action marked as debug level 0
- * will always be taken). The increasing debug levels are used for
- * increased verbosity.
- *
- * USAGE
- *
- * Group the code in modules and submodules inside each module [which
- * in most cases maps to Linux modules and .c files that compose
- * those].
- *
- * For each module, there is:
- *
- * - a MODULENAME (single word, legal C identifier)
- *
- * - a debug-levels.h header file that declares the list of
- * submodules and that is included by all .c files that use
- * the debugging tools. The file name can be anything.
- *
- * - some (optional) .c code to manipulate the runtime debug levels
- * through debugfs.
- *
- * The debug-levels.h file would look like:
- *
- * #ifndef __debug_levels__h__
- * #define __debug_levels__h__
- *
- * #define D_MODULENAME modulename
- * #define D_MASTER 10
- *
- * #include "linux-wimax-debug.h"
- *
- * enum d_module {
- * D_SUBMODULE_DECLARE(submodule_1),
- * D_SUBMODULE_DECLARE(submodule_2),
- * ...
- * D_SUBMODULE_DECLARE(submodule_N)
- * };
- *
- * #endif
- *
- * D_MASTER is the maximum compile-time debug level; any debug actions
- * above this will be out. D_MODULENAME is the module name (legal C
- * identifier), which has to be unique for each module (to avoid
- * namespace collisions during linkage). Note those #defines need to
- * be done before #including debug.h
- *
- * We declare N different submodules whose debug level can be
- * independently controlled during runtime.
- *
- * In a .c file of the module (and only in one of them), define the
- * following code:
- *
- * struct d_level D_LEVEL[] = {
- * D_SUBMODULE_DEFINE(submodule_1),
- * D_SUBMODULE_DEFINE(submodule_2),
- * ...
- * D_SUBMODULE_DEFINE(submodule_N),
- * };
- * size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
- *
- * Externs for d_level_MODULENAME and d_level_size_MODULENAME are used
- * and declared in this file using the D_LEVEL and D_LEVEL_SIZE macros
- * #defined also in this file.
- *
- * To manipulate from user space the levels, create a debugfs dentry
- * and then register each submodule with:
- *
- * d_level_register_debugfs("PREFIX_", submodule_X, parent);
- *
- * Where PREFIX_ is a name of your chosing. This will create debugfs
- * file with a single numeric value that can be use to tweak it. To
- * remove the entires, just use debugfs_remove_recursive() on 'parent'.
- *
- * NOTE: remember that even if this will show attached to some
- * particular instance of a device, the settings are *global*.
- *
- * On each submodule (for example, .c files), the debug infrastructure
- * should be included like this:
- *
- * #define D_SUBMODULE submodule_x // matches one in debug-levels.h
- * #include "debug-levels.h"
- *
- * after #including all your include files.
- *
- * Now you can use the d_*() macros below [d_test(), d_fnstart(),
- * d_fnend(), d_printf(), d_dump()].
- *
- * If their debug level is greater than D_MASTER, they will be
- * compiled out.
- *
- * If their debug level is lower or equal than D_MASTER but greater
- * than the current debug level of their submodule, they'll be
- * ignored.
- *
- * Otherwise, the action will be performed.
- */
-#ifndef __debug__h__
-#define __debug__h__
-
-#include <linux/types.h>
-#include <linux/slab.h>
-
-struct device;
-
-/* Backend stuff */
-
-/*
- * Debug backend: generate a message header from a 'struct device'
- *
- * @head: buffer where to place the header
- * @head_size: length of @head
- * @dev: pointer to device used to generate a header from. If NULL,
- * an empty ("") header is generated.
- */
-static inline
-void __d_head(char *head, size_t head_size,
- struct device *dev)
-{
- if (dev == NULL)
- head[0] = 0;
- else if ((unsigned long)dev < 4096) {
- printk(KERN_ERR "E: Corrupt dev %p\n", dev);
- WARN_ON(1);
- } else
- snprintf(head, head_size, "%s %s: ",
- dev_driver_string(dev), dev_name(dev));
-}
-
-
-/*
- * Debug backend: log some message if debugging is enabled
- *
- * @l: intended debug level
- * @tag: tag to prefix the message with
- * @dev: 'struct device' associated to this message
- * @f: printf-like format and arguments
- *
- * Note this is optimized out if it doesn't pass the compile-time
- * check; however, it is *always* compiled. This is useful to make
- * sure the printf-like formats and variables are always checked and
- * they don't get bit rot if you have all the debugging disabled.
- */
-#define _d_printf(l, tag, dev, f, a...) \
-do { \
- char head[64]; \
- if (!d_test(l)) \
- break; \
- __d_head(head, sizeof(head), dev); \
- printk(KERN_ERR "%s%s%s: " f, head, __func__, tag, ##a); \
-} while (0)
-
-
-/*
- * CPP syntactic sugar to generate A_B like symbol names when one of
- * the arguments is a preprocessor #define.
- */
-#define __D_PASTE__(varname, modulename) varname##_##modulename
-#define __D_PASTE(varname, modulename) (__D_PASTE__(varname, modulename))
-#define _D_SUBMODULE_INDEX(_name) (D_SUBMODULE_DECLARE(_name))
-
-
-/*
- * Store a submodule's runtime debug level and name
- */
-struct d_level {
- u8 level;
- const char *name;
-};
-
-
-/*
- * List of available submodules and their debug levels
- *
- * We call them d_level_MODULENAME and d_level_size_MODULENAME; the
- * macros D_LEVEL and D_LEVEL_SIZE contain the name already for
- * convenience.
- *
- * This array and the size are defined on some .c file that is part of
- * the current module.
- */
-#define D_LEVEL __D_PASTE(d_level, D_MODULENAME)
-#define D_LEVEL_SIZE __D_PASTE(d_level_size, D_MODULENAME)
-
-extern struct d_level D_LEVEL[];
-extern size_t D_LEVEL_SIZE;
-
-
-/*
- * Frontend stuff
- *
- *
- * Stuff you need to declare prior to using the actual "debug" actions
- * (defined below).
- */
-
-#ifndef D_MODULENAME
-#error D_MODULENAME is not defined in your debug-levels.h file
-/**
- * D_MODULE - Name of the current module
- *
- * #define in your module's debug-levels.h, making sure it is
- * unique. This has to be a legal C identifier.
- */
-#define D_MODULENAME undefined_modulename
-#endif
-
-
-#ifndef D_MASTER
-#warning D_MASTER not defined, but debug.h included! [see docs]
-/**
- * D_MASTER - Compile time maximum debug level
- *
- * #define in your debug-levels.h file to the maximum debug level the
- * runtime code will be allowed to have. This allows you to provide a
- * main knob.
- *
- * Anything above that level will be optimized out of the compile.
- *
- * Defaults to zero (no debug code compiled in).
- *
- * Maximum one definition per module (at the debug-levels.h file).
- */
-#define D_MASTER 0
-#endif
-
-#ifndef D_SUBMODULE
-#error D_SUBMODULE not defined, but debug.h included! [see docs]
-/**
- * D_SUBMODULE - Name of the current submodule
- *
- * #define in your submodule .c file before #including debug-levels.h
- * to the name of the current submodule as previously declared and
- * defined with D_SUBMODULE_DECLARE() (in your module's
- * debug-levels.h) and D_SUBMODULE_DEFINE().
- *
- * This is used to provide runtime-control over the debug levels.
- *
- * Maximum one per .c file! Can be shared among different .c files
- * (meaning they belong to the same submodule categorization).
- */
-#define D_SUBMODULE undefined_module
-#endif
-
-
-/**
- * D_SUBMODULE_DECLARE - Declare a submodule for runtime debug level control
- *
- * @_name: name of the submodule, restricted to the chars that make up a
- * valid C identifier ([a-zA-Z0-9_]).
- *
- * Declare in the module's debug-levels.h header file as:
- *
- * enum d_module {
- * D_SUBMODULE_DECLARE(submodule_1),
- * D_SUBMODULE_DECLARE(submodule_2),
- * D_SUBMODULE_DECLARE(submodule_3),
- * };
- *
- * Some corresponding .c file needs to have a matching
- * D_SUBMODULE_DEFINE().
- */
-#define D_SUBMODULE_DECLARE(_name) __D_SUBMODULE_##_name
-
-
-/**
- * D_SUBMODULE_DEFINE - Define a submodule for runtime debug level control
- *
- * @_name: name of the submodule, restricted to the chars that make up a
- * valid C identifier ([a-zA-Z0-9_]).
- *
- * Use once per module (in some .c file) as:
- *
- * static
- * struct d_level d_level_SUBMODULENAME[] = {
- * D_SUBMODULE_DEFINE(submodule_1),
- * D_SUBMODULE_DEFINE(submodule_2),
- * D_SUBMODULE_DEFINE(submodule_3),
- * };
- * size_t d_level_size_SUBDMODULENAME = ARRAY_SIZE(d_level_SUBDMODULENAME);
- *
- * Matching D_SUBMODULE_DECLARE()s have to be present in a
- * debug-levels.h header file.
- */
-#define D_SUBMODULE_DEFINE(_name) \
-[__D_SUBMODULE_##_name] = { \
- .level = 0, \
- .name = #_name \
-}
-
-
-
-/* The actual "debug" operations */
-
-
-/**
- * d_test - Returns true if debugging should be enabled
- *
- * @l: intended debug level (unsigned)
- *
- * If the master debug switch is enabled and the current settings are
- * higher or equal to the requested level, then debugging
- * output/actions should be enabled.
- *
- * NOTE:
- *
- * This needs to be coded so that it can be evaluated in compile
- * time; this is why the ugly BUG_ON() is placed in there, so the
- * D_MASTER evaluation compiles all out if it is compile-time false.
- */
-#define d_test(l) \
-({ \
- unsigned __l = l; /* type enforcer */ \
- (D_MASTER) >= __l \
- && ({ \
- BUG_ON(_D_SUBMODULE_INDEX(D_SUBMODULE) >= D_LEVEL_SIZE);\
- D_LEVEL[_D_SUBMODULE_INDEX(D_SUBMODULE)].level >= __l; \
- }); \
-})
-
-
-/**
- * d_fnstart - log message at function start if debugging enabled
- *
- * @l: intended debug level
- * @_dev: 'struct device' pointer, NULL if none (for context)
- * @f: printf-like format and arguments
- */
-#define d_fnstart(l, _dev, f, a...) _d_printf(l, " FNSTART", _dev, f, ## a)
-
-
-/**
- * d_fnend - log message at function end if debugging enabled
- *
- * @l: intended debug level
- * @_dev: 'struct device' pointer, NULL if none (for context)
- * @f: printf-like format and arguments
- */
-#define d_fnend(l, _dev, f, a...) _d_printf(l, " FNEND", _dev, f, ## a)
-
-
-/**
- * d_printf - log message if debugging enabled
- *
- * @l: intended debug level
- * @_dev: 'struct device' pointer, NULL if none (for context)
- * @f: printf-like format and arguments
- */
-#define d_printf(l, _dev, f, a...) _d_printf(l, "", _dev, f, ## a)
-
-
-/**
- * d_dump - log buffer hex dump if debugging enabled
- *
- * @l: intended debug level
- * @_dev: 'struct device' pointer, NULL if none (for context)
- * @f: printf-like format and arguments
- */
-#define d_dump(l, dev, ptr, size) \
-do { \
- char head[64]; \
- if (!d_test(l)) \
- break; \
- __d_head(head, sizeof(head), dev); \
- print_hex_dump(KERN_ERR, head, 0, 16, 1, \
- ((void *) ptr), (size), 0); \
-} while (0)
-
-
-/**
- * Export a submodule's debug level over debugfs as PREFIXSUBMODULE
- *
- * @prefix: string to prefix the name with
- * @submodule: name of submodule (not a string, just the name)
- * @dentry: debugfs parent dentry
- *
- * For removing, just use debugfs_remove_recursive() on the parent.
- */
-#define d_level_register_debugfs(prefix, name, parent) \
-({ \
- debugfs_create_u8( \
- prefix #name, 0600, parent, \
- &(D_LEVEL[__D_SUBMODULE_ ## name].level)); \
-})
-
-
-static inline
-void d_submodule_set(struct d_level *d_level, size_t d_level_size,
- const char *submodule, u8 level, const char *tag)
-{
- struct d_level *itr, *top;
- int index = -1;
-
- for (itr = d_level, top = itr + d_level_size; itr < top; itr++) {
- index++;
- if (itr->name == NULL) {
- printk(KERN_ERR "%s: itr->name NULL?? (%p, #%d)\n",
- tag, itr, index);
- continue;
- }
- if (!strcmp(itr->name, submodule)) {
- itr->level = level;
- return;
- }
- }
- printk(KERN_ERR "%s: unknown submodule %s\n", tag, submodule);
-}
-
-
-/**
- * d_parse_params - Parse a string with debug parameters from the
- * command line
- *
- * @d_level: level structure (D_LEVEL)
- * @d_level_size: number of items in the level structure
- * (D_LEVEL_SIZE).
- * @_params: string with the parameters; this is a space (not tab!)
- * separated list of NAME:VALUE, where value is the debug level
- * and NAME is the name of the submodule.
- * @tag: string for error messages (example: MODULE.ARGNAME).
- */
-static inline
-void d_parse_params(struct d_level *d_level, size_t d_level_size,
- const char *_params, const char *tag)
-{
- char submodule[130], *params, *params_orig, *token, *colon;
- unsigned level, tokens;
-
- if (_params == NULL)
- return;
- params_orig = kstrdup(_params, GFP_KERNEL);
- params = params_orig;
- while (1) {
- token = strsep(¶ms, " ");
- if (token == NULL)
- break;
- if (*token == '\0') /* eat joint spaces */
- continue;
- /* kernel's sscanf %s eats until whitespace, so we
- * replace : by \n so it doesn't get eaten later by
- * strsep */
- colon = strchr(token, ':');
- if (colon != NULL)
- *colon = '\n';
- tokens = sscanf(token, "%s\n%u", submodule, &level);
- if (colon != NULL)
- *colon = ':'; /* set back, for error messages */
- if (tokens == 2)
- d_submodule_set(d_level, d_level_size,
- submodule, level, tag);
- else
- printk(KERN_ERR "%s: can't parse '%s' as a "
- "SUBMODULE:LEVEL (%d tokens)\n",
- tag, token, tokens);
- }
- kfree(params_orig);
-}
-
-#endif /* #ifndef __debug__h__ */
diff --git a/drivers/staging/wimax/linux-wimax.h b/drivers/staging/wimax/linux-wimax.h
deleted file mode 100644
index 9f6b77af2f6d..000000000000
--- a/drivers/staging/wimax/linux-wimax.h
+++ /dev/null
@@ -1,239 +0,0 @@
-/*
- * Linux WiMax
- * API for user space
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- * - Initial implementation
- *
- *
- * This file declares the user/kernel protocol that is spoken over
- * Generic Netlink, as well as any type declaration that is to be used
- * by kernel and user space.
- *
- * It is intended for user space to clone it verbatim to use it as a
- * primary reference for definitions.
- *
- * Stuff intended for kernel usage as well as full protocol and stack
- * documentation is rooted in include/net/wimax.h.
- */
-
-#ifndef __LINUX__WIMAX_H__
-#define __LINUX__WIMAX_H__
-
-#include <linux/types.h>
-
-enum {
- /**
- * Version of the interface (unsigned decimal, MMm, max 25.5)
- * M - Major: change if removing or modifying an existing call.
- * m - minor: change when adding a new call
- */
- WIMAX_GNL_VERSION = 01,
- /* Generic NetLink attributes */
- WIMAX_GNL_ATTR_INVALID = 0x00,
- WIMAX_GNL_ATTR_MAX = 10,
-};
-
-
-/*
- * Generic NetLink operations
- *
- * Most of these map to an API call; _OP_ stands for operation, _RP_
- * for reply and _RE_ for report (aka: signal).
- */
-enum {
- WIMAX_GNL_OP_MSG_FROM_USER, /* User to kernel message */
- WIMAX_GNL_OP_MSG_TO_USER, /* Kernel to user message */
- WIMAX_GNL_OP_RFKILL, /* Run wimax_rfkill() */
- WIMAX_GNL_OP_RESET, /* Run wimax_rfkill() */
- WIMAX_GNL_RE_STATE_CHANGE, /* Report: status change */
- WIMAX_GNL_OP_STATE_GET, /* Request for current state */
-};
-
-
-/* Message from user / to user */
-enum {
- WIMAX_GNL_MSG_IFIDX = 1,
- WIMAX_GNL_MSG_PIPE_NAME,
- WIMAX_GNL_MSG_DATA,
-};
-
-
-/*
- * wimax_rfkill()
- *
- * The state of the radio (ON/OFF) is mapped to the rfkill subsystem's
- * switch state (DISABLED/ENABLED).
- */
-enum wimax_rf_state {
- WIMAX_RF_OFF = 0, /* Radio is off, rfkill on/enabled */
- WIMAX_RF_ON = 1, /* Radio is on, rfkill off/disabled */
- WIMAX_RF_QUERY = 2,
-};
-
-/* Attributes */
-enum {
- WIMAX_GNL_RFKILL_IFIDX = 1,
- WIMAX_GNL_RFKILL_STATE,
-};
-
-
-/* Attributes for wimax_reset() */
-enum {
- WIMAX_GNL_RESET_IFIDX = 1,
-};
-
-/* Attributes for wimax_state_get() */
-enum {
- WIMAX_GNL_STGET_IFIDX = 1,
-};
-
-/*
- * Attributes for the Report State Change
- *
- * For now we just have the old and new states; new attributes might
- * be added later on.
- */
-enum {
- WIMAX_GNL_STCH_IFIDX = 1,
- WIMAX_GNL_STCH_STATE_OLD,
- WIMAX_GNL_STCH_STATE_NEW,
-};
-
-
-/**
- * enum wimax_st - The different states of a WiMAX device
- * @__WIMAX_ST_NULL: The device structure has been allocated and zeroed,
- * but still wimax_dev_add() hasn't been called. There is no state.
- *
- * @WIMAX_ST_DOWN: The device has been registered with the WiMAX and
- * networking stacks, but it is not initialized (normally that is
- * done with 'ifconfig DEV up' [or equivalent], which can upload
- * firmware and enable communications with the device).
- * In this state, the device is powered down and using as less
- * power as possible.
- * This state is the default after a call to wimax_dev_add(). It
- * is ok to have drivers move directly to %WIMAX_ST_UNINITIALIZED
- * or %WIMAX_ST_RADIO_OFF in _probe() after the call to
- * wimax_dev_add().
- * It is recommended that the driver leaves this state when
- * calling 'ifconfig DEV up' and enters it back on 'ifconfig DEV
- * down'.
- *
- * @__WIMAX_ST_QUIESCING: The device is being torn down, so no API
- * operations are allowed to proceed except the ones needed to
- * complete the device clean up process.
- *
- * @WIMAX_ST_UNINITIALIZED: [optional] Communication with the device
- * is setup, but the device still requires some configuration
- * before being operational.
- * Some WiMAX API calls might work.
- *
- * @WIMAX_ST_RADIO_OFF: The device is fully up; radio is off (wether
- * by hardware or software switches).
- * It is recommended to always leave the device in this state
- * after initialization.
- *
- * @WIMAX_ST_READY: The device is fully up and radio is on.
- *
- * @WIMAX_ST_SCANNING: [optional] The device has been instructed to
- * scan. In this state, the device cannot be actively connected to
- * a network.
- *
- * @WIMAX_ST_CONNECTING: The device is connecting to a network. This
- * state exists because in some devices, the connect process can
- * include a number of negotiations between user space, kernel
- * space and the device. User space needs to know what the device
- * is doing. If the connect sequence in a device is atomic and
- * fast, the device can transition directly to CONNECTED
- *
- * @WIMAX_ST_CONNECTED: The device is connected to a network.
- *
- * @__WIMAX_ST_INVALID: This is an invalid state used to mark the
- * maximum numeric value of states.
- *
- * Description:
- *
- * Transitions from one state to another one are atomic and can only
- * be caused in kernel space with wimax_state_change(). To read the
- * state, use wimax_state_get().
- *
- * States starting with __ are internal and shall not be used or
- * referred to by drivers or userspace. They look ugly, but that's the
- * point -- if any use is made non-internal to the stack, it is easier
- * to catch on review.
- *
- * All API operations [with well defined exceptions] will take the
- * device mutex before starting and then check the state. If the state
- * is %__WIMAX_ST_NULL, %WIMAX_ST_DOWN, %WIMAX_ST_UNINITIALIZED or
- * %__WIMAX_ST_QUIESCING, it will drop the lock and quit with
- * -%EINVAL, -%ENOMEDIUM, -%ENOTCONN or -%ESHUTDOWN.
- *
- * The order of the definitions is important, so we can do numerical
- * comparisons (eg: < %WIMAX_ST_RADIO_OFF means the device is not ready
- * to operate).
- */
-/*
- * The allowed state transitions are described in the table below
- * (states in rows can go to states in columns where there is an X):
- *
- * UNINI RADIO READY SCAN CONNEC CONNEC
- * NULL DOWN QUIESCING TIALIZED OFF NING TING TED
- * NULL - x
- * DOWN - x x x
- * QUIESCING x -
- * UNINITIALIZED x - x
- * RADIO_OFF x - x
- * READY x x - x x x
- * SCANNING x x x - x x
- * CONNECTING x x x x - x
- * CONNECTED x x x -
- *
- * This table not available in kernel-doc because the formatting messes it up.
- */
- enum wimax_st {
- __WIMAX_ST_NULL = 0,
- WIMAX_ST_DOWN,
- __WIMAX_ST_QUIESCING,
- WIMAX_ST_UNINITIALIZED,
- WIMAX_ST_RADIO_OFF,
- WIMAX_ST_READY,
- WIMAX_ST_SCANNING,
- WIMAX_ST_CONNECTING,
- WIMAX_ST_CONNECTED,
- __WIMAX_ST_INVALID /* Always keep last */
-};
-
-
-#endif /* #ifndef __LINUX__WIMAX_H__ */
diff --git a/drivers/staging/wimax/net-wimax.h b/drivers/staging/wimax/net-wimax.h
deleted file mode 100644
index f578e345e2bd..000000000000
--- a/drivers/staging/wimax/net-wimax.h
+++ /dev/null
@@ -1,503 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Linux WiMAX
- * Kernel space API for accessing WiMAX devices
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * The WiMAX stack provides an API for controlling and managing the
- * system's WiMAX devices. This API affects the control plane; the
- * data plane is accessed via the network stack (netdev).
- *
- * Parts of the WiMAX stack API and notifications are exported to
- * user space via Generic Netlink. In user space, libwimax (part of
- * the wimax-tools package) provides a shim layer for accessing those
- * calls.
- *
- * The API is standarized for all WiMAX devices and different drivers
- * implement the backend support for it. However, device-specific
- * messaging pipes are provided that can be used to issue commands and
- * receive notifications in free form.
- *
- * Currently the messaging pipes are the only means of control as it
- * is not known (due to the lack of more devices in the market) what
- * will be a good abstraction layer. Expect this to change as more
- * devices show in the market. This API is designed to be growable in
- * order to address this problem.
- *
- * USAGE
- *
- * Embed a `struct wimax_dev` at the beginning of the device's
- * private structure, initialize and register it. For details, see
- * `struct wimax_dev`s documentation.
- *
- * Once this is done, wimax-tools's libwimaxll can be used to
- * communicate with the driver from user space. You user space
- * application does not have to forcibily use libwimaxll and can talk
- * the generic netlink protocol directly if desired.
- *
- * Remember this is a very low level API that will to provide all of
- * WiMAX features. Other daemons and services running in user space
- * are the expected clients of it. They offer a higher level API that
- * applications should use (an example of this is the Intel's WiMAX
- * Network Service for the i2400m).
- *
- * DESIGN
- *
- * Although not set on final stone, this very basic interface is
- * mostly completed. Remember this is meant to grow as new common
- * operations are decided upon. New operations will be added to the
- * interface, intent being on keeping backwards compatibility as much
- * as possible.
- *
- * This layer implements a set of calls to control a WiMAX device,
- * exposing a frontend to the rest of the kernel and user space (via
- * generic netlink) and a backend implementation in the driver through
- * function pointers.
- *
- * WiMAX devices have a state, and a kernel-only API allows the
- * drivers to manipulate that state. State transitions are atomic, and
- * only some of them are allowed (see `enum wimax_st`).
- *
- * Most API calls will set the state automatically; in most cases
- * drivers have to only report state changes due to external
- * conditions.
- *
- * All API operations are 'atomic', serialized through a mutex in the
- * `struct wimax_dev`.
- *
- * EXPORTING TO USER SPACE THROUGH GENERIC NETLINK
- *
- * The API is exported to user space using generic netlink (other
- * methods can be added as needed).
- *
- * There is a Generic Netlink Family named "WiMAX", where interfaces
- * supporting the WiMAX interface receive commands and broadcast their
- * signals over a multicast group named "msg".
- *
- * Mapping to the source/destination interface is done by an interface
- * index attribute.
- *
- * For user-to-kernel traffic (commands) we use a function call
- * marshalling mechanism, where a message X with attributes A, B, C
- * sent from user space to kernel space means executing the WiMAX API
- * call wimax_X(A, B, C), sending the results back as a message.
- *
- * Kernel-to-user (notifications or signals) communication is sent
- * over multicast groups. This allows to have multiple applications
- * monitoring them.
- *
- * Each command/signal gets assigned it's own attribute policy. This
- * way the validator will verify that all the attributes in there are
- * only the ones that should be for each command/signal. Thing of an
- * attribute mapping to a type+argumentname for each command/signal.
- *
- * If we had a single policy for *all* commands/signals, after running
- * the validator we'd have to check "does this attribute belong in
- * here"? for each one. It can be done manually, but it's just easier
- * to have the validator do that job with multiple policies. As well,
- * it makes it easier to later expand each command/signal signature
- * without affecting others and keeping the namespace more or less
- * sane. Not that it is too complicated, but it makes it even easier.
- *
- * No state information is maintained in the kernel for each user
- * space connection (the connection is stateless).
- *
- * TESTING FOR THE INTERFACE AND VERSIONING
- *
- * If network interface X is a WiMAX device, there will be a Generic
- * Netlink family named "WiMAX X" and the device will present a
- * "wimax" directory in it's network sysfs directory
- * (/sys/class/net/DEVICE/wimax) [used by HAL].
- *
- * The inexistence of any of these means the device does not support
- * this WiMAX API.
- *
- * By querying the generic netlink controller, versioning information
- * and the multicast groups available can be found. Applications using
- * the interface can either rely on that or use the generic netlink
- * controller to figure out which generic netlink commands/signals are
- * supported.
- *
- * NOTE: this versioning is a last resort to avoid hard
- * incompatibilities. It is the intention of the design of this
- * stack not to introduce backward incompatible changes.
- *
- * The version code has to fit in one byte (restrictions imposed by
- * generic netlink); we use `version / 10` for the major version and
- * `version % 10` for the minor. This gives 9 minors for each major
- * and 25 majors.
- *
- * The version change protocol is as follow:
- *
- * - Major versions: needs to be increased if an existing message/API
- * call is changed or removed. Doesn't need to be changed if a new
- * message is added.
- *
- * - Minor version: needs to be increased if new messages/API calls are
- * being added or some other consideration that doesn't impact the
- * user-kernel interface too much (like some kind of bug fix) and
- * that is kind of left up in the air to common sense.
- *
- * User space code should not try to work if the major version it was
- * compiled for differs from what the kernel offers. As well, if the
- * minor version of the kernel interface is lower than the one user
- * space is expecting (the one it was compiled for), the kernel
- * might be missing API calls; user space shall be ready to handle
- * said condition. Use the generic netlink controller operations to
- * find which ones are supported and which not.
- *
- * libwimaxll:wimaxll_open() takes care of checking versions.
- *
- * THE OPERATIONS:
- *
- * Each operation is defined in its on file (drivers/net/wimax/op-*.c)
- * for clarity. The parts needed for an operation are:
- *
- * - a function pointer in `struct wimax_dev`: optional, as the
- * operation might be implemented by the stack and not by the
- * driver.
- *
- * All function pointers are named wimax_dev->op_*(), and drivers
- * must implement them except where noted otherwise.
- *
- * - When exported to user space, a `struct nla_policy` to define the
- * attributes of the generic netlink command and a `struct genl_ops`
- * to define the operation.
- *
- * All the declarations for the operation codes (WIMAX_GNL_OP_<NAME>)
- * and generic netlink attributes (WIMAX_GNL_<NAME>_*) are declared in
- * include/linux/wimax.h; this file is intended to be cloned by user
- * space to gain access to those declarations.
- *
- * A few caveats to remember:
- *
- * - Need to define attribute numbers starting in 1; otherwise it
- * fails.
- *
- * - the `struct genl_family` requires a maximum attribute id; when
- * defining the `struct nla_policy` for each message, it has to have
- * an array size of WIMAX_GNL_ATTR_MAX+1.
- *
- * The op_*() function pointers will not be called if the wimax_dev is
- * in a state <= %WIMAX_ST_UNINITIALIZED. The exception is:
- *
- * - op_reset: can be called at any time after wimax_dev_add() has
- * been called.
- *
- * THE PIPE INTERFACE:
- *
- * This interface is kept intentionally simple. The driver can send
- * and receive free-form messages to/from user space through a
- * pipe. See drivers/net/wimax/op-msg.c for details.
- *
- * The kernel-to-user messages are sent with
- * wimax_msg(). user-to-kernel messages are delivered via
- * wimax_dev->op_msg_from_user().
- *
- * RFKILL:
- *
- * RFKILL support is built into the wimax_dev layer; the driver just
- * needs to call wimax_report_rfkill_{hw,sw}() to inform of changes in
- * the hardware or software RF kill switches. When the stack wants to
- * turn the radio off, it will call wimax_dev->op_rfkill_sw_toggle(),
- * which the driver implements.
- *
- * User space can set the software RF Kill switch by calling
- * wimax_rfkill().
- *
- * The code for now only supports devices that don't require polling;
- * If the device needs to be polled, create a self-rearming delayed
- * work struct for polling or look into adding polled support to the
- * WiMAX stack.
- *
- * When initializing the hardware (_probe), after calling
- * wimax_dev_add(), query the device for it's RF Kill switches status
- * and feed it back to the WiMAX stack using
- * wimax_report_rfkill_{hw,sw}(). If any switch is missing, always
- * report it as ON.
- *
- * NOTE: the wimax stack uses an inverted terminology to that of the
- * RFKILL subsystem:
- *
- * - ON: radio is ON, RFKILL is DISABLED or OFF.
- * - OFF: radio is OFF, RFKILL is ENABLED or ON.
- *
- * MISCELLANEOUS OPS:
- *
- * wimax_reset() can be used to reset the device to power on state; by
- * default it issues a warm reset that maintains the same device
- * node. If that is not possible, it falls back to a cold reset
- * (device reconnect). The driver implements the backend to this
- * through wimax_dev->op_reset().
- */
-
-#ifndef __NET__WIMAX_H__
-#define __NET__WIMAX_H__
-
-#include "linux-wimax.h"
-#include <net/genetlink.h>
-#include <linux/netdevice.h>
-
-struct net_device;
-struct genl_info;
-struct wimax_dev;
-
-/**
- * struct wimax_dev - Generic WiMAX device
- *
- * @net_dev: [fill] Pointer to the &struct net_device this WiMAX
- * device implements.
- *
- * @op_msg_from_user: [fill] Driver-specific operation to
- * handle a raw message from user space to the driver. The
- * driver can send messages to user space using with
- * wimax_msg_to_user().
- *
- * @op_rfkill_sw_toggle: [fill] Driver-specific operation to act on
- * userspace (or any other agent) requesting the WiMAX device to
- * change the RF Kill software switch (WIMAX_RF_ON or
- * WIMAX_RF_OFF).
- * If such hardware support is not present, it is assumed the
- * radio cannot be switched off and it is always on (and the stack
- * will error out when trying to switch it off). In such case,
- * this function pointer can be left as NULL.
- *
- * @op_reset: [fill] Driver specific operation to reset the
- * device.
- * This operation should always attempt first a warm reset that
- * does not disconnect the device from the bus and return 0.
- * If that fails, it should resort to some sort of cold or bus
- * reset (even if it implies a bus disconnection and device
- * disappearance). In that case, -ENODEV should be returned to
- * indicate the device is gone.
- * This operation has to be synchronous, and return only when the
- * reset is complete. In case of having had to resort to bus/cold
- * reset implying a device disconnection, the call is allowed to
- * return immediately.
- * NOTE: wimax_dev->mutex is NOT locked when this op is being
- * called; however, wimax_dev->mutex_reset IS locked to ensure
- * serialization of calls to wimax_reset().
- * See wimax_reset()'s documentation.
- *
- * @name: [fill] A way to identify this device. We need to register a
- * name with many subsystems (rfkill, workqueue creation, etc).
- * We can't use the network device name as that
- * might change and in some instances we don't know it yet (until
- * we don't call register_netdev()). So we generate an unique one
- * using the driver name and device bus id, place it here and use
- * it across the board. Recommended naming:
- * DRIVERNAME-BUSNAME:BUSID (dev->bus->name, dev->bus_id).
- *
- * @id_table_node: [private] link to the list of wimax devices kept by
- * id-table.c. Protected by it's own spinlock.
- *
- * @mutex: [private] Serializes all concurrent access and execution of
- * operations.
- *
- * @mutex_reset: [private] Serializes reset operations. Needs to be a
- * different mutex because as part of the reset operation, the
- * driver has to call back into the stack to do things such as
- * state change, that require wimax_dev->mutex.
- *
- * @state: [private] Current state of the WiMAX device.
- *
- * @rfkill: [private] integration into the RF-Kill infrastructure.
- *
- * @rf_sw: [private] State of the software radio switch (OFF/ON)
- *
- * @rf_hw: [private] State of the hardware radio switch (OFF/ON)
- *
- * @debugfs_dentry: [private] Used to hook up a debugfs entry. This
- * shows up in the debugfs root as wimax\:DEVICENAME.
- *
- * Description:
- * This structure defines a common interface to access all WiMAX
- * devices from different vendors and provides a common API as well as
- * a free-form device-specific messaging channel.
- *
- * Usage:
- * 1. Embed a &struct wimax_dev at *the beginning* the network
- * device structure so that netdev_priv() points to it.
- *
- * 2. memset() it to zero
- *
- * 3. Initialize with wimax_dev_init(). This will leave the WiMAX
- * device in the %__WIMAX_ST_NULL state.
- *
- * 4. Fill all the fields marked with [fill]; once called
- * wimax_dev_add(), those fields CANNOT be modified.
- *
- * 5. Call wimax_dev_add() *after* registering the network
- * device. This will leave the WiMAX device in the %WIMAX_ST_DOWN
- * state.
- * Protect the driver's net_device->open() against succeeding if
- * the wimax device state is lower than %WIMAX_ST_DOWN.
- *
- * 6. Select when the device is going to be turned on/initialized;
- * for example, it could be initialized on 'ifconfig up' (when the
- * netdev op 'open()' is called on the driver).
- *
- * When the device is initialized (at `ifconfig up` time, or right
- * after calling wimax_dev_add() from _probe(), make sure the
- * following steps are taken
- *
- * a. Move the device to %WIMAX_ST_UNINITIALIZED. This is needed so
- * some API calls that shouldn't work until the device is ready
- * can be blocked.
- *
- * b. Initialize the device. Make sure to turn the SW radio switch
- * off and move the device to state %WIMAX_ST_RADIO_OFF when
- * done. When just initialized, a device should be left in RADIO
- * OFF state until user space devices to turn it on.
- *
- * c. Query the device for the state of the hardware rfkill switch
- * and call wimax_rfkill_report_hw() and wimax_rfkill_report_sw()
- * as needed. See below.
- *
- * wimax_dev_rm() undoes before unregistering the network device. Once
- * wimax_dev_add() is called, the driver can get called on the
- * wimax_dev->op_* function pointers
- *
- * CONCURRENCY:
- *
- * The stack provides a mutex for each device that will disallow API
- * calls happening concurrently; thus, op calls into the driver
- * through the wimax_dev->op*() function pointers will always be
- * serialized and *never* concurrent.
- *
- * For locking, take wimax_dev->mutex is taken; (most) operations in
- * the API have to check for wimax_dev_is_ready() to return 0 before
- * continuing (this is done internally).
- *
- * REFERENCE COUNTING:
- *
- * The WiMAX device is reference counted by the associated network
- * device. The only operation that can be used to reference the device
- * is wimax_dev_get_by_genl_info(), and the reference it acquires has
- * to be released with dev_put(wimax_dev->net_dev).
- *
- * RFKILL:
- *
- * At startup, both HW and SW radio switchess are assumed to be off.
- *
- * At initialization time [after calling wimax_dev_add()], have the
- * driver query the device for the status of the software and hardware
- * RF kill switches and call wimax_report_rfkill_hw() and
- * wimax_rfkill_report_sw() to indicate their state. If any is
- * missing, just call it to indicate it is ON (radio always on).
- *
- * Whenever the driver detects a change in the state of the RF kill
- * switches, it should call wimax_report_rfkill_hw() or
- * wimax_report_rfkill_sw() to report it to the stack.
- */
-struct wimax_dev {
- struct net_device *net_dev;
- struct list_head id_table_node;
- struct mutex mutex; /* Protects all members and API calls */
- struct mutex mutex_reset;
- enum wimax_st state;
-
- int (*op_msg_from_user)(struct wimax_dev *wimax_dev,
- const char *,
- const void *, size_t,
- const struct genl_info *info);
- int (*op_rfkill_sw_toggle)(struct wimax_dev *wimax_dev,
- enum wimax_rf_state);
- int (*op_reset)(struct wimax_dev *wimax_dev);
-
- struct rfkill *rfkill;
- unsigned int rf_hw;
- unsigned int rf_sw;
- char name[32];
-
- struct dentry *debugfs_dentry;
-};
-
-
-
-/*
- * WiMAX stack public API for device drivers
- * -----------------------------------------
- *
- * These functions are not exported to user space.
- */
-void wimax_dev_init(struct wimax_dev *);
-int wimax_dev_add(struct wimax_dev *, struct net_device *);
-void wimax_dev_rm(struct wimax_dev *);
-
-static inline
-struct wimax_dev *net_dev_to_wimax(struct net_device *net_dev)
-{
- return netdev_priv(net_dev);
-}
-
-static inline
-struct device *wimax_dev_to_dev(struct wimax_dev *wimax_dev)
-{
- return wimax_dev->net_dev->dev.parent;
-}
-
-void wimax_state_change(struct wimax_dev *, enum wimax_st);
-enum wimax_st wimax_state_get(struct wimax_dev *);
-
-/*
- * Radio Switch state reporting.
- *
- * enum wimax_rf_state is declared in linux/wimax.h so the exports
- * to user space can use it.
- */
-void wimax_report_rfkill_hw(struct wimax_dev *, enum wimax_rf_state);
-void wimax_report_rfkill_sw(struct wimax_dev *, enum wimax_rf_state);
-
-
-/*
- * Free-form messaging to/from user space
- *
- * Sending a message:
- *
- * wimax_msg(wimax_dev, pipe_name, buf, buf_size, GFP_KERNEL);
- *
- * Broken up:
- *
- * skb = wimax_msg_alloc(wimax_dev, pipe_name, buf_size, GFP_KERNEL);
- * ...fill up skb...
- * wimax_msg_send(wimax_dev, pipe_name, skb);
- *
- * Be sure not to modify skb->data in the middle (ie: don't use
- * skb_push()/skb_pull()/skb_reserve() on the skb).
- *
- * "pipe_name" is any string, that can be interpreted as the name of
- * the pipe or recipient; the interpretation of it is driver
- * specific, so the recipient can multiplex it as wished. It can be
- * NULL, it won't be used - an example is using a "diagnostics" tag to
- * send diagnostics information that a device-specific diagnostics
- * tool would be interested in.
- */
-struct sk_buff *wimax_msg_alloc(struct wimax_dev *, const char *, const void *,
- size_t, gfp_t);
-int wimax_msg_send(struct wimax_dev *, struct sk_buff *);
-int wimax_msg(struct wimax_dev *, const char *, const void *, size_t, gfp_t);
-
-const void *wimax_msg_data_len(struct sk_buff *, size_t *);
-const void *wimax_msg_data(struct sk_buff *);
-ssize_t wimax_msg_len(struct sk_buff *);
-
-
-/*
- * WiMAX stack user space API
- * --------------------------
- *
- * This API is what gets exported to user space for general
- * operations. As well, they can be called from within the kernel,
- * (with a properly referenced `struct wimax_dev`).
- *
- * Properly referenced means: the 'struct net_device' that embeds the
- * device's control structure and (as such) the 'struct wimax_dev' is
- * referenced by the caller.
- */
-int wimax_rfkill(struct wimax_dev *, enum wimax_rf_state);
-int wimax_reset(struct wimax_dev *);
-
-#endif /* #ifndef __NET__WIMAX_H__ */
diff --git a/drivers/staging/wimax/op-msg.c b/drivers/staging/wimax/op-msg.c
deleted file mode 100644
index e20ac7d84e82..000000000000
--- a/drivers/staging/wimax/op-msg.c
+++ /dev/null
@@ -1,391 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Generic messaging interface between userspace and driver/device
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This implements a direct communication channel between user space and
- * the driver/device, by which free form messages can be sent back and
- * forth.
- *
- * This is intended for device-specific features, vendor quirks, etc.
- *
- * See include/net/wimax.h
- *
- * GENERIC NETLINK ENCODING AND CAPACITY
- *
- * A destination "pipe name" is added to each message; it is up to the
- * drivers to assign or use those names (if using them at all).
- *
- * Messages are encoded as a binary netlink attribute using nla_put()
- * using type NLA_UNSPEC (as some versions of libnl still in
- * deployment don't yet understand NLA_BINARY).
- *
- * The maximum capacity of this transport is PAGESIZE per message (so
- * the actual payload will be bit smaller depending on the
- * netlink/generic netlink attributes and headers).
- *
- * RECEPTION OF MESSAGES
- *
- * When a message is received from user space, it is passed verbatim
- * to the driver calling wimax_dev->op_msg_from_user(). The return
- * value from this function is passed back to user space as an ack
- * over the generic netlink protocol.
- *
- * The stack doesn't do any processing or interpretation of these
- * messages.
- *
- * SENDING MESSAGES
- *
- * Messages can be sent with wimax_msg().
- *
- * If the message delivery needs to happen on a different context to
- * that of its creation, wimax_msg_alloc() can be used to get a
- * pointer to the message that can be delivered later on with
- * wimax_msg_send().
- *
- * ROADMAP
- *
- * wimax_gnl_doit_msg_from_user() Process a message from user space
- * wimax_dev_get_by_genl_info()
- * wimax_dev->op_msg_from_user() Delivery of message to the driver
- *
- * wimax_msg() Send a message to user space
- * wimax_msg_alloc()
- * wimax_msg_send()
- */
-#include <linux/device.h>
-#include <linux/slab.h>
-#include <net/genetlink.h>
-#include <linux/netdevice.h>
-#include "linux-wimax.h"
-#include <linux/security.h>
-#include <linux/export.h>
-#include "wimax-internal.h"
-
-
-#define D_SUBMODULE op_msg
-#include "debug-levels.h"
-
-
-/**
- * wimax_msg_alloc - Create a new skb for sending a message to userspace
- *
- * @wimax_dev: WiMAX device descriptor
- * @pipe_name: "named pipe" the message will be sent to
- * @msg: pointer to the message data to send
- * @size: size of the message to send (in bytes), including the header.
- * @gfp_flags: flags for memory allocation.
- *
- * Returns: %0 if ok, negative errno code on error
- *
- * Description:
- *
- * Allocates an skb that will contain the message to send to user
- * space over the messaging pipe and initializes it, copying the
- * payload.
- *
- * Once this call is done, you can deliver it with
- * wimax_msg_send().
- *
- * IMPORTANT:
- *
- * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
- * wimax_msg_send() depends on skb->data being placed at the
- * beginning of the user message.
- *
- * Unlike other WiMAX stack calls, this call can be used way early,
- * even before wimax_dev_add() is called, as long as the
- * wimax_dev->net_dev pointer is set to point to a proper
- * net_dev. This is so that drivers can use it early in case they need
- * to send stuff around or communicate with user space.
- */
-struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
- const char *pipe_name,
- const void *msg, size_t size,
- gfp_t gfp_flags)
-{
- int result;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- size_t msg_size;
- void *genl_msg;
- struct sk_buff *skb;
-
- msg_size = nla_total_size(size)
- + nla_total_size(sizeof(u32))
- + (pipe_name ? nla_total_size(strlen(pipe_name)) : 0);
- result = -ENOMEM;
- skb = genlmsg_new(msg_size, gfp_flags);
- if (skb == NULL)
- goto error_new;
- genl_msg = genlmsg_put(skb, 0, 0, &wimax_gnl_family,
- 0, WIMAX_GNL_OP_MSG_TO_USER);
- if (genl_msg == NULL) {
- dev_err(dev, "no memory to create generic netlink message\n");
- goto error_genlmsg_put;
- }
- result = nla_put_u32(skb, WIMAX_GNL_MSG_IFIDX,
- wimax_dev->net_dev->ifindex);
- if (result < 0) {
- dev_err(dev, "no memory to add ifindex attribute\n");
- goto error_nla_put;
- }
- if (pipe_name) {
- result = nla_put_string(skb, WIMAX_GNL_MSG_PIPE_NAME,
- pipe_name);
- if (result < 0) {
- dev_err(dev, "no memory to add pipe_name attribute\n");
- goto error_nla_put;
- }
- }
- result = nla_put(skb, WIMAX_GNL_MSG_DATA, size, msg);
- if (result < 0) {
- dev_err(dev, "no memory to add payload (msg %p size %zu) in "
- "attribute: %d\n", msg, size, result);
- goto error_nla_put;
- }
- genlmsg_end(skb, genl_msg);
- return skb;
-
-error_nla_put:
-error_genlmsg_put:
-error_new:
- nlmsg_free(skb);
- return ERR_PTR(result);
-}
-EXPORT_SYMBOL_GPL(wimax_msg_alloc);
-
-
-/**
- * wimax_msg_data_len - Return a pointer and size of a message's payload
- *
- * @msg: Pointer to a message created with wimax_msg_alloc()
- * @size: Pointer to where to store the message's size
- *
- * Returns the pointer to the message data.
- */
-const void *wimax_msg_data_len(struct sk_buff *msg, size_t *size)
-{
- struct nlmsghdr *nlh = (void *) msg->head;
- struct nlattr *nla;
-
- nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
- WIMAX_GNL_MSG_DATA);
- if (nla == NULL) {
- pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n");
- return NULL;
- }
- *size = nla_len(nla);
- return nla_data(nla);
-}
-EXPORT_SYMBOL_GPL(wimax_msg_data_len);
-
-
-/**
- * wimax_msg_data - Return a pointer to a message's payload
- *
- * @msg: Pointer to a message created with wimax_msg_alloc()
- */
-const void *wimax_msg_data(struct sk_buff *msg)
-{
- struct nlmsghdr *nlh = (void *) msg->head;
- struct nlattr *nla;
-
- nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
- WIMAX_GNL_MSG_DATA);
- if (nla == NULL) {
- pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n");
- return NULL;
- }
- return nla_data(nla);
-}
-EXPORT_SYMBOL_GPL(wimax_msg_data);
-
-
-/**
- * wimax_msg_len - Return a message's payload length
- *
- * @msg: Pointer to a message created with wimax_msg_alloc()
- */
-ssize_t wimax_msg_len(struct sk_buff *msg)
-{
- struct nlmsghdr *nlh = (void *) msg->head;
- struct nlattr *nla;
-
- nla = nlmsg_find_attr(nlh, sizeof(struct genlmsghdr),
- WIMAX_GNL_MSG_DATA);
- if (nla == NULL) {
- pr_err("Cannot find attribute WIMAX_GNL_MSG_DATA\n");
- return -EINVAL;
- }
- return nla_len(nla);
-}
-EXPORT_SYMBOL_GPL(wimax_msg_len);
-
-
-/**
- * wimax_msg_send - Send a pre-allocated message to user space
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * @skb: &struct sk_buff returned by wimax_msg_alloc(). Note the
- * ownership of @skb is transferred to this function.
- *
- * Returns: 0 if ok, < 0 errno code on error
- *
- * Description:
- *
- * Sends a free-form message that was preallocated with
- * wimax_msg_alloc() and filled up.
- *
- * Assumes that once you pass an skb to this function for sending, it
- * owns it and will release it when done (on success).
- *
- * IMPORTANT:
- *
- * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
- * wimax_msg_send() depends on skb->data being placed at the
- * beginning of the user message.
- *
- * Unlike other WiMAX stack calls, this call can be used way early,
- * even before wimax_dev_add() is called, as long as the
- * wimax_dev->net_dev pointer is set to point to a proper
- * net_dev. This is so that drivers can use it early in case they need
- * to send stuff around or communicate with user space.
- */
-int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
-{
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- void *msg = skb->data;
- size_t size = skb->len;
- might_sleep();
-
- d_printf(1, dev, "CTX: wimax msg, %zu bytes\n", size);
- d_dump(2, dev, msg, size);
- genlmsg_multicast(&wimax_gnl_family, skb, 0, 0, GFP_KERNEL);
- d_printf(1, dev, "CTX: genl multicast done\n");
- return 0;
-}
-EXPORT_SYMBOL_GPL(wimax_msg_send);
-
-
-/**
- * wimax_msg - Send a message to user space
- *
- * @wimax_dev: WiMAX device descriptor (properly referenced)
- * @pipe_name: "named pipe" the message will be sent to
- * @buf: pointer to the message to send.
- * @size: size of the buffer pointed to by @buf (in bytes).
- * @gfp_flags: flags for memory allocation.
- *
- * Returns: %0 if ok, negative errno code on error.
- *
- * Description:
- *
- * Sends a free-form message to user space on the device @wimax_dev.
- *
- * NOTES:
- *
- * Once the @skb is given to this function, who will own it and will
- * release it when done (unless it returns error).
- */
-int wimax_msg(struct wimax_dev *wimax_dev, const char *pipe_name,
- const void *buf, size_t size, gfp_t gfp_flags)
-{
- int result = -ENOMEM;
- struct sk_buff *skb;
-
- skb = wimax_msg_alloc(wimax_dev, pipe_name, buf, size, gfp_flags);
- if (IS_ERR(skb))
- result = PTR_ERR(skb);
- else
- result = wimax_msg_send(wimax_dev, skb);
- return result;
-}
-EXPORT_SYMBOL_GPL(wimax_msg);
-
-/*
- * Relays a message from user space to the driver
- *
- * The skb is passed to the driver-specific function with the netlink
- * and generic netlink headers already stripped.
- *
- * This call will block while handling/relaying the message.
- */
-int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info)
-{
- int result, ifindex;
- struct wimax_dev *wimax_dev;
- struct device *dev;
- struct nlmsghdr *nlh = info->nlhdr;
- char *pipe_name;
- void *msg_buf;
- size_t msg_len;
-
- might_sleep();
- d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
- result = -ENODEV;
- if (info->attrs[WIMAX_GNL_MSG_IFIDX] == NULL) {
- pr_err("WIMAX_GNL_MSG_FROM_USER: can't find IFIDX attribute\n");
- goto error_no_wimax_dev;
- }
- ifindex = nla_get_u32(info->attrs[WIMAX_GNL_MSG_IFIDX]);
- wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
- if (wimax_dev == NULL)
- goto error_no_wimax_dev;
- dev = wimax_dev_to_dev(wimax_dev);
-
- /* Unpack arguments */
- result = -EINVAL;
- if (info->attrs[WIMAX_GNL_MSG_DATA] == NULL) {
- dev_err(dev, "WIMAX_GNL_MSG_FROM_USER: can't find MSG_DATA "
- "attribute\n");
- goto error_no_data;
- }
- msg_buf = nla_data(info->attrs[WIMAX_GNL_MSG_DATA]);
- msg_len = nla_len(info->attrs[WIMAX_GNL_MSG_DATA]);
-
- if (info->attrs[WIMAX_GNL_MSG_PIPE_NAME] == NULL)
- pipe_name = NULL;
- else {
- struct nlattr *attr = info->attrs[WIMAX_GNL_MSG_PIPE_NAME];
- size_t attr_len = nla_len(attr);
- /* libnl-1.1 does not yet support NLA_NUL_STRING */
- result = -ENOMEM;
- pipe_name = kstrndup(nla_data(attr), attr_len + 1, GFP_KERNEL);
- if (pipe_name == NULL)
- goto error_alloc;
- pipe_name[attr_len] = 0;
- }
- mutex_lock(&wimax_dev->mutex);
- result = wimax_dev_is_ready(wimax_dev);
- if (result == -ENOMEDIUM)
- result = 0;
- if (result < 0)
- goto error_not_ready;
- result = -ENOSYS;
- if (wimax_dev->op_msg_from_user == NULL)
- goto error_noop;
-
- d_printf(1, dev,
- "CRX: nlmsghdr len %u type %u flags 0x%04x seq 0x%x pid %u\n",
- nlh->nlmsg_len, nlh->nlmsg_type, nlh->nlmsg_flags,
- nlh->nlmsg_seq, nlh->nlmsg_pid);
- d_printf(1, dev, "CRX: wimax message %zu bytes\n", msg_len);
- d_dump(2, dev, msg_buf, msg_len);
-
- result = wimax_dev->op_msg_from_user(wimax_dev, pipe_name,
- msg_buf, msg_len, info);
-error_noop:
-error_not_ready:
- mutex_unlock(&wimax_dev->mutex);
-error_alloc:
- kfree(pipe_name);
-error_no_data:
- dev_put(wimax_dev->net_dev);
-error_no_wimax_dev:
- d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
- return result;
-}
diff --git a/drivers/staging/wimax/op-reset.c b/drivers/staging/wimax/op-reset.c
deleted file mode 100644
index b3f000cbe112..000000000000
--- a/drivers/staging/wimax/op-reset.c
+++ /dev/null
@@ -1,108 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Implement and export a method for resetting a WiMAX device
- *
- * Copyright (C) 2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This implements a simple synchronous call to reset a WiMAX device.
- *
- * Resets aim at being warm, keeping the device handles active;
- * however, when that fails, it falls back to a cold reset (that will
- * disconnect and reconnect the device).
- */
-
-#include "net-wimax.h"
-#include <net/genetlink.h>
-#include "linux-wimax.h"
-#include <linux/security.h>
-#include <linux/export.h>
-#include "wimax-internal.h"
-
-#define D_SUBMODULE op_reset
-#include "debug-levels.h"
-
-
-/**
- * wimax_reset - Reset a WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * Returns:
- *
- * %0 if ok and a warm reset was done (the device still exists in
- * the system).
- *
- * -%ENODEV if a cold/bus reset had to be done (device has
- * disconnected and reconnected, so current handle is not valid
- * any more).
- *
- * -%EINVAL if the device is not even registered.
- *
- * Any other negative error code shall be considered as
- * non-recoverable.
- *
- * Description:
- *
- * Called when wanting to reset the device for any reason. Device is
- * taken back to power on status.
- *
- * This call blocks; on successful return, the device has completed the
- * reset process and is ready to operate.
- */
-int wimax_reset(struct wimax_dev *wimax_dev)
-{
- int result = -EINVAL;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_st state;
-
- might_sleep();
- d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
- mutex_lock(&wimax_dev->mutex);
- dev_hold(wimax_dev->net_dev);
- state = wimax_dev->state;
- mutex_unlock(&wimax_dev->mutex);
-
- if (state >= WIMAX_ST_DOWN) {
- mutex_lock(&wimax_dev->mutex_reset);
- result = wimax_dev->op_reset(wimax_dev);
- mutex_unlock(&wimax_dev->mutex_reset);
- }
- dev_put(wimax_dev->net_dev);
-
- d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
- return result;
-}
-EXPORT_SYMBOL(wimax_reset);
-
-
-/*
- * Exporting to user space over generic netlink
- *
- * Parse the reset command from user space, return error code.
- *
- * No attributes.
- */
-int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info)
-{
- int result, ifindex;
- struct wimax_dev *wimax_dev;
-
- d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
- result = -ENODEV;
- if (info->attrs[WIMAX_GNL_RESET_IFIDX] == NULL) {
- pr_err("WIMAX_GNL_OP_RFKILL: can't find IFIDX attribute\n");
- goto error_no_wimax_dev;
- }
- ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RESET_IFIDX]);
- wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
- if (wimax_dev == NULL)
- goto error_no_wimax_dev;
- /* Execute the operation and send the result back to user space */
- result = wimax_reset(wimax_dev);
- dev_put(wimax_dev->net_dev);
-error_no_wimax_dev:
- d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
- return result;
-}
diff --git a/drivers/staging/wimax/op-rfkill.c b/drivers/staging/wimax/op-rfkill.c
deleted file mode 100644
index 52612ed09183..000000000000
--- a/drivers/staging/wimax/op-rfkill.c
+++ /dev/null
@@ -1,432 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * RF-kill framework integration
- *
- * Copyright (C) 2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This integrates into the Linux Kernel rfkill susbystem so that the
- * drivers just have to do the bare minimal work, which is providing a
- * method to set the software RF-Kill switch and to report changes in
- * the software and hardware switch status.
- *
- * A non-polled generic rfkill device is embedded into the WiMAX
- * subsystem's representation of a device.
- *
- * FIXME: Need polled support? Let drivers provide a poll routine
- * and hand it to rfkill ops then?
- *
- * All device drivers have to do is after wimax_dev_init(), call
- * wimax_report_rfkill_hw() and wimax_report_rfkill_sw() to update
- * initial state and then every time it changes. See wimax.h:struct
- * wimax_dev for more information.
- *
- * ROADMAP
- *
- * wimax_gnl_doit_rfkill() User space calling wimax_rfkill()
- * wimax_rfkill() Kernel calling wimax_rfkill()
- * __wimax_rf_toggle_radio()
- *
- * wimax_rfkill_set_radio_block() RF-Kill subsystem calling
- * __wimax_rf_toggle_radio()
- *
- * __wimax_rf_toggle_radio()
- * wimax_dev->op_rfkill_sw_toggle() Driver backend
- * __wimax_state_change()
- *
- * wimax_report_rfkill_sw() Driver reports state change
- * __wimax_state_change()
- *
- * wimax_report_rfkill_hw() Driver reports state change
- * __wimax_state_change()
- *
- * wimax_rfkill_add() Initialize/shutdown rfkill support
- * wimax_rfkill_rm() [called by wimax_dev_add/rm()]
- */
-
-#include "net-wimax.h"
-#include <net/genetlink.h>
-#include "linux-wimax.h"
-#include <linux/security.h>
-#include <linux/rfkill.h>
-#include <linux/export.h>
-#include "wimax-internal.h"
-
-#define D_SUBMODULE op_rfkill
-#include "debug-levels.h"
-
-/**
- * wimax_report_rfkill_hw - Reports changes in the hardware RF switch
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * @state: New state of the RF Kill switch. %WIMAX_RF_ON radio on,
- * %WIMAX_RF_OFF radio off.
- *
- * When the device detects a change in the state of thehardware RF
- * switch, it must call this function to let the WiMAX kernel stack
- * know that the state has changed so it can be properly propagated.
- *
- * The WiMAX stack caches the state (the driver doesn't need to). As
- * well, as the change is propagated it will come back as a request to
- * change the software state to mirror the hardware state.
- *
- * If the device doesn't have a hardware kill switch, just report
- * it on initialization as always on (%WIMAX_RF_ON, radio on).
- */
-void wimax_report_rfkill_hw(struct wimax_dev *wimax_dev,
- enum wimax_rf_state state)
-{
- int result;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_st wimax_state;
-
- d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
- BUG_ON(state == WIMAX_RF_QUERY);
- BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF);
-
- mutex_lock(&wimax_dev->mutex);
- result = wimax_dev_is_ready(wimax_dev);
- if (result < 0)
- goto error_not_ready;
-
- if (state != wimax_dev->rf_hw) {
- wimax_dev->rf_hw = state;
- if (wimax_dev->rf_hw == WIMAX_RF_ON &&
- wimax_dev->rf_sw == WIMAX_RF_ON)
- wimax_state = WIMAX_ST_READY;
- else
- wimax_state = WIMAX_ST_RADIO_OFF;
-
- result = rfkill_set_hw_state(wimax_dev->rfkill,
- state == WIMAX_RF_OFF);
-
- __wimax_state_change(wimax_dev, wimax_state);
- }
-error_not_ready:
- mutex_unlock(&wimax_dev->mutex);
- d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n",
- wimax_dev, state, result);
-}
-EXPORT_SYMBOL_GPL(wimax_report_rfkill_hw);
-
-
-/**
- * wimax_report_rfkill_sw - Reports changes in the software RF switch
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * @state: New state of the RF kill switch. %WIMAX_RF_ON radio on,
- * %WIMAX_RF_OFF radio off.
- *
- * Reports changes in the software RF switch state to the WiMAX stack.
- *
- * The main use is during initialization, so the driver can query the
- * device for its current software radio kill switch state and feed it
- * to the system.
- *
- * On the side, the device does not change the software state by
- * itself. In practice, this can happen, as the device might decide to
- * switch (in software) the radio off for different reasons.
- */
-void wimax_report_rfkill_sw(struct wimax_dev *wimax_dev,
- enum wimax_rf_state state)
-{
- int result;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_st wimax_state;
-
- d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
- BUG_ON(state == WIMAX_RF_QUERY);
- BUG_ON(state != WIMAX_RF_ON && state != WIMAX_RF_OFF);
-
- mutex_lock(&wimax_dev->mutex);
- result = wimax_dev_is_ready(wimax_dev);
- if (result < 0)
- goto error_not_ready;
-
- if (state != wimax_dev->rf_sw) {
- wimax_dev->rf_sw = state;
- if (wimax_dev->rf_hw == WIMAX_RF_ON &&
- wimax_dev->rf_sw == WIMAX_RF_ON)
- wimax_state = WIMAX_ST_READY;
- else
- wimax_state = WIMAX_ST_RADIO_OFF;
- __wimax_state_change(wimax_dev, wimax_state);
- rfkill_set_sw_state(wimax_dev->rfkill, state == WIMAX_RF_OFF);
- }
-error_not_ready:
- mutex_unlock(&wimax_dev->mutex);
- d_fnend(3, dev, "(wimax_dev %p state %u) = void [%d]\n",
- wimax_dev, state, result);
-}
-EXPORT_SYMBOL_GPL(wimax_report_rfkill_sw);
-
-
-/*
- * Callback for the RF Kill toggle operation
- *
- * This function is called by:
- *
- * - The rfkill subsystem when the RF-Kill key is pressed in the
- * hardware and the driver notifies through
- * wimax_report_rfkill_hw(). The rfkill subsystem ends up calling back
- * here so the software RF Kill switch state is changed to reflect
- * the hardware switch state.
- *
- * - When the user sets the state through sysfs' rfkill/state file
- *
- * - When the user calls wimax_rfkill().
- *
- * This call blocks!
- *
- * WARNING! When we call rfkill_unregister(), this will be called with
- * state 0!
- *
- * WARNING: wimax_dev must be locked
- */
-static
-int __wimax_rf_toggle_radio(struct wimax_dev *wimax_dev,
- enum wimax_rf_state state)
-{
- int result = 0;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_st wimax_state;
-
- might_sleep();
- d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
- if (wimax_dev->rf_sw == state)
- goto out_no_change;
- if (wimax_dev->op_rfkill_sw_toggle != NULL)
- result = wimax_dev->op_rfkill_sw_toggle(wimax_dev, state);
- else if (state == WIMAX_RF_OFF) /* No op? can't turn off */
- result = -ENXIO;
- else /* No op? can turn on */
- result = 0; /* should never happen tho */
- if (result >= 0) {
- result = 0;
- wimax_dev->rf_sw = state;
- wimax_state = state == WIMAX_RF_ON ?
- WIMAX_ST_READY : WIMAX_ST_RADIO_OFF;
- __wimax_state_change(wimax_dev, wimax_state);
- }
-out_no_change:
- d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n",
- wimax_dev, state, result);
- return result;
-}
-
-
-/*
- * Translate from rfkill state to wimax state
- *
- * NOTE: Special state handling rules here
- *
- * Just pretend the call didn't happen if we are in a state where
- * we know for sure it cannot be handled (WIMAX_ST_DOWN or
- * __WIMAX_ST_QUIESCING). rfkill() needs it to register and
- * unregister, as it will run this path.
- *
- * NOTE: This call will block until the operation is completed.
- */
-static int wimax_rfkill_set_radio_block(void *data, bool blocked)
-{
- int result;
- struct wimax_dev *wimax_dev = data;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_rf_state rf_state;
-
- d_fnstart(3, dev, "(wimax_dev %p blocked %u)\n", wimax_dev, blocked);
- rf_state = WIMAX_RF_ON;
- if (blocked)
- rf_state = WIMAX_RF_OFF;
- mutex_lock(&wimax_dev->mutex);
- if (wimax_dev->state <= __WIMAX_ST_QUIESCING)
- result = 0;
- else
- result = __wimax_rf_toggle_radio(wimax_dev, rf_state);
- mutex_unlock(&wimax_dev->mutex);
- d_fnend(3, dev, "(wimax_dev %p blocked %u) = %d\n",
- wimax_dev, blocked, result);
- return result;
-}
-
-static const struct rfkill_ops wimax_rfkill_ops = {
- .set_block = wimax_rfkill_set_radio_block,
-};
-
-/**
- * wimax_rfkill - Set the software RF switch state for a WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * @state: New RF state.
- *
- * Returns:
- *
- * >= 0 toggle state if ok, < 0 errno code on error. The toggle state
- * is returned as a bitmap, bit 0 being the hardware RF state, bit 1
- * the software RF state.
- *
- * 0 means disabled (%WIMAX_RF_ON, radio on), 1 means enabled radio
- * off (%WIMAX_RF_OFF).
- *
- * Description:
- *
- * Called by the user when he wants to request the WiMAX radio to be
- * switched on (%WIMAX_RF_ON) or off (%WIMAX_RF_OFF). With
- * %WIMAX_RF_QUERY, just the current state is returned.
- *
- * NOTE:
- *
- * This call will block until the operation is complete.
- */
-int wimax_rfkill(struct wimax_dev *wimax_dev, enum wimax_rf_state state)
-{
- int result;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
-
- d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
- mutex_lock(&wimax_dev->mutex);
- result = wimax_dev_is_ready(wimax_dev);
- if (result < 0) {
- /* While initializing, < 1.4.3 wimax-tools versions use
- * this call to check if the device is a valid WiMAX
- * device; so we allow it to proceed always,
- * considering the radios are all off.
- */
- if (result == -ENOMEDIUM && state == WIMAX_RF_QUERY)
- result = WIMAX_RF_OFF << 1 | WIMAX_RF_OFF;
- goto error_not_ready;
- }
- switch (state) {
- case WIMAX_RF_ON:
- case WIMAX_RF_OFF:
- result = __wimax_rf_toggle_radio(wimax_dev, state);
- if (result < 0)
- goto error;
- rfkill_set_sw_state(wimax_dev->rfkill, state == WIMAX_RF_OFF);
- break;
- case WIMAX_RF_QUERY:
- break;
- default:
- result = -EINVAL;
- goto error;
- }
- result = wimax_dev->rf_sw << 1 | wimax_dev->rf_hw;
-error:
-error_not_ready:
- mutex_unlock(&wimax_dev->mutex);
- d_fnend(3, dev, "(wimax_dev %p state %u) = %d\n",
- wimax_dev, state, result);
- return result;
-}
-EXPORT_SYMBOL(wimax_rfkill);
-
-
-/*
- * Register a new WiMAX device's RF Kill support
- *
- * WARNING: wimax_dev->mutex must be unlocked
- */
-int wimax_rfkill_add(struct wimax_dev *wimax_dev)
-{
- int result;
- struct rfkill *rfkill;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
-
- d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
- /* Initialize RF Kill */
- result = -ENOMEM;
- rfkill = rfkill_alloc(wimax_dev->name, dev, RFKILL_TYPE_WIMAX,
- &wimax_rfkill_ops, wimax_dev);
- if (rfkill == NULL)
- goto error_rfkill_allocate;
-
- d_printf(1, dev, "rfkill %p\n", rfkill);
-
- wimax_dev->rfkill = rfkill;
-
- rfkill_init_sw_state(rfkill, 1);
- result = rfkill_register(wimax_dev->rfkill);
- if (result < 0)
- goto error_rfkill_register;
-
- /* If there is no SW toggle op, SW RFKill is always on */
- if (wimax_dev->op_rfkill_sw_toggle == NULL)
- wimax_dev->rf_sw = WIMAX_RF_ON;
-
- d_fnend(3, dev, "(wimax_dev %p) = 0\n", wimax_dev);
- return 0;
-
-error_rfkill_register:
- rfkill_destroy(wimax_dev->rfkill);
-error_rfkill_allocate:
- d_fnend(3, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
- return result;
-}
-
-
-/*
- * Deregister a WiMAX device's RF Kill support
- *
- * Ick, we can't call rfkill_free() after rfkill_unregister()...oh
- * well.
- *
- * WARNING: wimax_dev->mutex must be unlocked
- */
-void wimax_rfkill_rm(struct wimax_dev *wimax_dev)
-{
- struct device *dev = wimax_dev_to_dev(wimax_dev);
-
- d_fnstart(3, dev, "(wimax_dev %p)\n", wimax_dev);
- rfkill_unregister(wimax_dev->rfkill);
- rfkill_destroy(wimax_dev->rfkill);
- d_fnend(3, dev, "(wimax_dev %p)\n", wimax_dev);
-}
-
-
-/*
- * Exporting to user space over generic netlink
- *
- * Parse the rfkill command from user space, return a combination
- * value that describe the states of the different toggles.
- *
- * Only one attribute: the new state requested (on, off or no change,
- * just query).
- */
-
-int wimax_gnl_doit_rfkill(struct sk_buff *skb, struct genl_info *info)
-{
- int result, ifindex;
- struct wimax_dev *wimax_dev;
- struct device *dev;
- enum wimax_rf_state new_state;
-
- d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
- result = -ENODEV;
- if (info->attrs[WIMAX_GNL_RFKILL_IFIDX] == NULL) {
- pr_err("WIMAX_GNL_OP_RFKILL: can't find IFIDX attribute\n");
- goto error_no_wimax_dev;
- }
- ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_IFIDX]);
- wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
- if (wimax_dev == NULL)
- goto error_no_wimax_dev;
- dev = wimax_dev_to_dev(wimax_dev);
- result = -EINVAL;
- if (info->attrs[WIMAX_GNL_RFKILL_STATE] == NULL) {
- dev_err(dev, "WIMAX_GNL_RFKILL: can't find RFKILL_STATE attribute\n");
- goto error_no_pid;
- }
- new_state = nla_get_u32(info->attrs[WIMAX_GNL_RFKILL_STATE]);
-
- /* Execute the operation and send the result back to user space */
- result = wimax_rfkill(wimax_dev, new_state);
-error_no_pid:
- dev_put(wimax_dev->net_dev);
-error_no_wimax_dev:
- d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
- return result;
-}
diff --git a/drivers/staging/wimax/op-state-get.c b/drivers/staging/wimax/op-state-get.c
deleted file mode 100644
index c5bfbed505f5..000000000000
--- a/drivers/staging/wimax/op-state-get.c
+++ /dev/null
@@ -1,52 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Implement and export a method for getting a WiMAX device current state
- *
- * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@...tonika.lt>
- *
- * Based on previous WiMAX core work by:
- * Copyright (C) 2008 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- */
-
-#include "net-wimax.h"
-#include <net/genetlink.h>
-#include "linux-wimax.h"
-#include <linux/security.h>
-#include "wimax-internal.h"
-
-#define D_SUBMODULE op_state_get
-#include "debug-levels.h"
-
-
-/*
- * Exporting to user space over generic netlink
- *
- * Parse the state get command from user space, return a combination
- * value that describe the current state.
- *
- * No attributes.
- */
-int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
-{
- int result, ifindex;
- struct wimax_dev *wimax_dev;
-
- d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
- result = -ENODEV;
- if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
- pr_err("WIMAX_GNL_OP_STATE_GET: can't find IFIDX attribute\n");
- goto error_no_wimax_dev;
- }
- ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
- wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
- if (wimax_dev == NULL)
- goto error_no_wimax_dev;
- /* Execute the operation and send the result back to user space */
- result = wimax_state_get(wimax_dev);
- dev_put(wimax_dev->net_dev);
-error_no_wimax_dev:
- d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
- return result;
-}
diff --git a/drivers/staging/wimax/stack.c b/drivers/staging/wimax/stack.c
deleted file mode 100644
index 485c02230eb2..000000000000
--- a/drivers/staging/wimax/stack.c
+++ /dev/null
@@ -1,604 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Linux WiMAX
- * Initialization, addition and removal of wimax devices
- *
- * Copyright (C) 2005-2006 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This implements:
- *
- * - basic life cycle of 'struct wimax_dev' [wimax_dev_*()]; on
- * addition/registration initialize all subfields and allocate
- * generic netlink resources for user space communication. On
- * removal/unregistration, undo all that.
- *
- * - device state machine [wimax_state_change()] and support to send
- * reports to user space when the state changes
- * [wimax_gnl_re_state_change*()].
- *
- * See include/net/wimax.h for rationales and design.
- *
- * ROADMAP
- *
- * [__]wimax_state_change() Called by drivers to update device's state
- * wimax_gnl_re_state_change_alloc()
- * wimax_gnl_re_state_change_send()
- *
- * wimax_dev_init() Init a device
- * wimax_dev_add() Register
- * wimax_rfkill_add()
- * wimax_gnl_add() Register all the generic netlink resources.
- * wimax_id_table_add()
- * wimax_dev_rm() Unregister
- * wimax_id_table_rm()
- * wimax_gnl_rm()
- * wimax_rfkill_rm()
- */
-#include <linux/device.h>
-#include <linux/gfp.h>
-#include <net/genetlink.h>
-#include <linux/netdevice.h>
-#include "linux-wimax.h"
-#include <linux/module.h>
-#include "wimax-internal.h"
-
-
-#define D_SUBMODULE stack
-#include "debug-levels.h"
-
-static char wimax_debug_params[128];
-module_param_string(debug, wimax_debug_params, sizeof(wimax_debug_params),
- 0644);
-MODULE_PARM_DESC(debug,
- "String of space-separated NAME:VALUE pairs, where NAMEs "
- "are the different debug submodules and VALUE are the "
- "initial debug value to set.");
-
-/*
- * Allocate a Report State Change message
- *
- * @header: save it, you need it for _send()
- *
- * Creates and fills a basic state change message; different code
- * paths can then add more attributes to the message as needed.
- *
- * Use wimax_gnl_re_state_change_send() to send the returned skb.
- *
- * Returns: skb with the genl message if ok, IS_ERR() ptr on error
- * with an errno code.
- */
-static
-struct sk_buff *wimax_gnl_re_state_change_alloc(
- struct wimax_dev *wimax_dev,
- enum wimax_st new_state, enum wimax_st old_state,
- void **header)
-{
- int result;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- void *data;
- struct sk_buff *report_skb;
-
- d_fnstart(3, dev, "(wimax_dev %p new_state %u old_state %u)\n",
- wimax_dev, new_state, old_state);
- result = -ENOMEM;
- report_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (report_skb == NULL) {
- dev_err(dev, "RE_STCH: can't create message\n");
- goto error_new;
- }
- /* FIXME: sending a group ID as the seq is wrong */
- data = genlmsg_put(report_skb, 0, wimax_gnl_family.mcgrp_offset,
- &wimax_gnl_family, 0, WIMAX_GNL_RE_STATE_CHANGE);
- if (data == NULL) {
- dev_err(dev, "RE_STCH: can't put data into message\n");
- goto error_put;
- }
- *header = data;
-
- result = nla_put_u8(report_skb, WIMAX_GNL_STCH_STATE_OLD, old_state);
- if (result < 0) {
- dev_err(dev, "RE_STCH: Error adding OLD attr: %d\n", result);
- goto error_put;
- }
- result = nla_put_u8(report_skb, WIMAX_GNL_STCH_STATE_NEW, new_state);
- if (result < 0) {
- dev_err(dev, "RE_STCH: Error adding NEW attr: %d\n", result);
- goto error_put;
- }
- result = nla_put_u32(report_skb, WIMAX_GNL_STCH_IFIDX,
- wimax_dev->net_dev->ifindex);
- if (result < 0) {
- dev_err(dev, "RE_STCH: Error adding IFINDEX attribute\n");
- goto error_put;
- }
- d_fnend(3, dev, "(wimax_dev %p new_state %u old_state %u) = %p\n",
- wimax_dev, new_state, old_state, report_skb);
- return report_skb;
-
-error_put:
- nlmsg_free(report_skb);
-error_new:
- d_fnend(3, dev, "(wimax_dev %p new_state %u old_state %u) = %d\n",
- wimax_dev, new_state, old_state, result);
- return ERR_PTR(result);
-}
-
-
-/*
- * Send a Report State Change message (as created with _alloc).
- *
- * @report_skb: as returned by wimax_gnl_re_state_change_alloc()
- * @header: as returned by wimax_gnl_re_state_change_alloc()
- *
- * Returns: 0 if ok, < 0 errno code on error.
- *
- * If the message is NULL, pretend it didn't happen.
- */
-static
-int wimax_gnl_re_state_change_send(
- struct wimax_dev *wimax_dev, struct sk_buff *report_skb,
- void *header)
-{
- int result = 0;
- struct device *dev = wimax_dev_to_dev(wimax_dev);
-
- d_fnstart(3, dev, "(wimax_dev %p report_skb %p)\n",
- wimax_dev, report_skb);
- if (report_skb == NULL) {
- result = -ENOMEM;
- goto out;
- }
- genlmsg_end(report_skb, header);
- genlmsg_multicast(&wimax_gnl_family, report_skb, 0, 0, GFP_KERNEL);
-out:
- d_fnend(3, dev, "(wimax_dev %p report_skb %p) = %d\n",
- wimax_dev, report_skb, result);
- return result;
-}
-
-
-static
-void __check_new_state(enum wimax_st old_state, enum wimax_st new_state,
- unsigned int allowed_states_bm)
-{
- if (WARN_ON(((1 << new_state) & allowed_states_bm) == 0)) {
- pr_err("SW BUG! Forbidden state change %u -> %u\n",
- old_state, new_state);
- }
-}
-
-
-/*
- * Set the current state of a WiMAX device [unlocking version of
- * wimax_state_change().
- */
-void __wimax_state_change(struct wimax_dev *wimax_dev, enum wimax_st new_state)
-{
- struct device *dev = wimax_dev_to_dev(wimax_dev);
- enum wimax_st old_state = wimax_dev->state;
- struct sk_buff *stch_skb;
- void *header;
-
- d_fnstart(3, dev, "(wimax_dev %p new_state %u [old %u])\n",
- wimax_dev, new_state, old_state);
-
- if (WARN_ON(new_state >= __WIMAX_ST_INVALID)) {
- dev_err(dev, "SW BUG: requesting invalid state %u\n",
- new_state);
- goto out;
- }
- if (old_state == new_state)
- goto out;
- header = NULL; /* gcc complains? can't grok why */
- stch_skb = wimax_gnl_re_state_change_alloc(
- wimax_dev, new_state, old_state, &header);
-
- /* Verify the state transition and do exit-from-state actions */
- switch (old_state) {
- case __WIMAX_ST_NULL:
- __check_new_state(old_state, new_state,
- 1 << WIMAX_ST_DOWN);
- break;
- case WIMAX_ST_DOWN:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_UNINITIALIZED
- | 1 << WIMAX_ST_RADIO_OFF);
- break;
- case __WIMAX_ST_QUIESCING:
- __check_new_state(old_state, new_state, 1 << WIMAX_ST_DOWN);
- break;
- case WIMAX_ST_UNINITIALIZED:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_RADIO_OFF);
- break;
- case WIMAX_ST_RADIO_OFF:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_READY);
- break;
- case WIMAX_ST_READY:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_RADIO_OFF
- | 1 << WIMAX_ST_SCANNING
- | 1 << WIMAX_ST_CONNECTING
- | 1 << WIMAX_ST_CONNECTED);
- break;
- case WIMAX_ST_SCANNING:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_RADIO_OFF
- | 1 << WIMAX_ST_READY
- | 1 << WIMAX_ST_CONNECTING
- | 1 << WIMAX_ST_CONNECTED);
- break;
- case WIMAX_ST_CONNECTING:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_RADIO_OFF
- | 1 << WIMAX_ST_READY
- | 1 << WIMAX_ST_SCANNING
- | 1 << WIMAX_ST_CONNECTED);
- break;
- case WIMAX_ST_CONNECTED:
- __check_new_state(old_state, new_state,
- 1 << __WIMAX_ST_QUIESCING
- | 1 << WIMAX_ST_RADIO_OFF
- | 1 << WIMAX_ST_READY);
- netif_tx_disable(wimax_dev->net_dev);
- netif_carrier_off(wimax_dev->net_dev);
- break;
- case __WIMAX_ST_INVALID:
- default:
- dev_err(dev, "SW BUG: wimax_dev %p is in unknown state %u\n",
- wimax_dev, wimax_dev->state);
- WARN_ON(1);
- goto out;
- }
-
- /* Execute the actions of entry to the new state */
- switch (new_state) {
- case __WIMAX_ST_NULL:
- dev_err(dev, "SW BUG: wimax_dev %p entering NULL state "
- "from %u\n", wimax_dev, wimax_dev->state);
- WARN_ON(1); /* Nobody can enter this state */
- break;
- case WIMAX_ST_DOWN:
- break;
- case __WIMAX_ST_QUIESCING:
- break;
- case WIMAX_ST_UNINITIALIZED:
- break;
- case WIMAX_ST_RADIO_OFF:
- break;
- case WIMAX_ST_READY:
- break;
- case WIMAX_ST_SCANNING:
- break;
- case WIMAX_ST_CONNECTING:
- break;
- case WIMAX_ST_CONNECTED:
- netif_carrier_on(wimax_dev->net_dev);
- netif_wake_queue(wimax_dev->net_dev);
- break;
- case __WIMAX_ST_INVALID:
- default:
- BUG();
- }
- __wimax_state_set(wimax_dev, new_state);
- if (!IS_ERR(stch_skb))
- wimax_gnl_re_state_change_send(wimax_dev, stch_skb, header);
-out:
- d_fnend(3, dev, "(wimax_dev %p new_state %u [old %u]) = void\n",
- wimax_dev, new_state, old_state);
-}
-
-
-/**
- * wimax_state_change - Set the current state of a WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor (properly referenced)
- * @new_state: New state to switch to
- *
- * This implements the state changes for the wimax devices. It will
- *
- * - verify that the state transition is legal (for now it'll just
- * print a warning if not) according to the table in
- * linux/wimax.h's documentation for 'enum wimax_st'.
- *
- * - perform the actions needed for leaving the current state and
- * whichever are needed for entering the new state.
- *
- * - issue a report to user space indicating the new state (and an
- * optional payload with information about the new state).
- *
- * NOTE: @wimax_dev must be locked
- */
-void wimax_state_change(struct wimax_dev *wimax_dev, enum wimax_st new_state)
-{
- /*
- * A driver cannot take the wimax_dev out of the
- * __WIMAX_ST_NULL state unless by calling wimax_dev_add(). If
- * the wimax_dev's state is still NULL, we ignore any request
- * to change its state because it means it hasn't been yet
- * registered.
- *
- * There is no need to complain about it, as routines that
- * call this might be shared from different code paths that
- * are called before or after wimax_dev_add() has done its
- * job.
- */
- mutex_lock(&wimax_dev->mutex);
- if (wimax_dev->state > __WIMAX_ST_NULL)
- __wimax_state_change(wimax_dev, new_state);
- mutex_unlock(&wimax_dev->mutex);
-}
-EXPORT_SYMBOL_GPL(wimax_state_change);
-
-
-/**
- * wimax_state_get() - Return the current state of a WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * Returns: Current state of the device according to its driver.
- */
-enum wimax_st wimax_state_get(struct wimax_dev *wimax_dev)
-{
- enum wimax_st state;
-
- mutex_lock(&wimax_dev->mutex);
- state = wimax_dev->state;
- mutex_unlock(&wimax_dev->mutex);
- return state;
-}
-EXPORT_SYMBOL_GPL(wimax_state_get);
-
-
-/**
- * wimax_dev_init - initialize a newly allocated instance
- *
- * @wimax_dev: WiMAX device descriptor to initialize.
- *
- * Initializes fields of a freshly allocated @wimax_dev instance. This
- * function assumes that after allocation, the memory occupied by
- * @wimax_dev was zeroed.
- */
-void wimax_dev_init(struct wimax_dev *wimax_dev)
-{
- INIT_LIST_HEAD(&wimax_dev->id_table_node);
- __wimax_state_set(wimax_dev, __WIMAX_ST_NULL);
- mutex_init(&wimax_dev->mutex);
- mutex_init(&wimax_dev->mutex_reset);
-}
-EXPORT_SYMBOL_GPL(wimax_dev_init);
-
-/*
- * There are multiple enums reusing the same values, adding
- * others is only possible if they use a compatible policy.
- */
-static const struct nla_policy wimax_gnl_policy[WIMAX_GNL_ATTR_MAX + 1] = {
- /*
- * WIMAX_GNL_RESET_IFIDX, WIMAX_GNL_RFKILL_IFIDX,
- * WIMAX_GNL_STGET_IFIDX, WIMAX_GNL_MSG_IFIDX
- */
- [1] = { .type = NLA_U32, },
- /*
- * WIMAX_GNL_RFKILL_STATE, WIMAX_GNL_MSG_PIPE_NAME
- */
- [2] = { .type = NLA_U32, }, /* enum wimax_rf_state */
- /*
- * WIMAX_GNL_MSG_DATA
- */
- [3] = { .type = NLA_UNSPEC, }, /* libnl doesn't grok BINARY yet */
-};
-
-static const struct genl_small_ops wimax_gnl_ops[] = {
- {
- .cmd = WIMAX_GNL_OP_MSG_FROM_USER,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_ADMIN_PERM,
- .doit = wimax_gnl_doit_msg_from_user,
- },
- {
- .cmd = WIMAX_GNL_OP_RESET,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_ADMIN_PERM,
- .doit = wimax_gnl_doit_reset,
- },
- {
- .cmd = WIMAX_GNL_OP_RFKILL,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_ADMIN_PERM,
- .doit = wimax_gnl_doit_rfkill,
- },
- {
- .cmd = WIMAX_GNL_OP_STATE_GET,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_ADMIN_PERM,
- .doit = wimax_gnl_doit_state_get,
- },
-};
-
-
-static
-size_t wimax_addr_scnprint(char *addr_str, size_t addr_str_size,
- unsigned char *addr, size_t addr_len)
-{
- unsigned int cnt, total;
-
- for (total = cnt = 0; cnt < addr_len; cnt++)
- total += scnprintf(addr_str + total, addr_str_size - total,
- "%02x%c", addr[cnt],
- cnt == addr_len - 1 ? '\0' : ':');
- return total;
-}
-
-
-/**
- * wimax_dev_add - Register a new WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor (as embedded in your @net_dev's
- * priv data). You must have called wimax_dev_init() on it before.
- *
- * @net_dev: net device the @wimax_dev is associated with. The
- * function expects SET_NETDEV_DEV() and register_netdev() were
- * already called on it.
- *
- * Registers the new WiMAX device, sets up the user-kernel control
- * interface (generic netlink) and common WiMAX infrastructure.
- *
- * Note that the parts that will allow interaction with user space are
- * setup at the very end, when the rest is in place, as once that
- * happens, the driver might get user space control requests via
- * netlink or from debugfs that might translate into calls into
- * wimax_dev->op_*().
- */
-int wimax_dev_add(struct wimax_dev *wimax_dev, struct net_device *net_dev)
-{
- int result;
- struct device *dev = net_dev->dev.parent;
- char addr_str[32];
-
- d_fnstart(3, dev, "(wimax_dev %p net_dev %p)\n", wimax_dev, net_dev);
-
- /* Do the RFKILL setup before locking, as RFKILL will call
- * into our functions.
- */
- wimax_dev->net_dev = net_dev;
- result = wimax_rfkill_add(wimax_dev);
- if (result < 0)
- goto error_rfkill_add;
-
- /* Set up user-space interaction */
- mutex_lock(&wimax_dev->mutex);
- wimax_id_table_add(wimax_dev);
- wimax_debugfs_add(wimax_dev);
-
- __wimax_state_set(wimax_dev, WIMAX_ST_DOWN);
- mutex_unlock(&wimax_dev->mutex);
-
- wimax_addr_scnprint(addr_str, sizeof(addr_str),
- net_dev->dev_addr, net_dev->addr_len);
- dev_err(dev, "WiMAX interface %s (%s) ready\n",
- net_dev->name, addr_str);
- d_fnend(3, dev, "(wimax_dev %p net_dev %p) = 0\n", wimax_dev, net_dev);
- return 0;
-
-error_rfkill_add:
- d_fnend(3, dev, "(wimax_dev %p net_dev %p) = %d\n",
- wimax_dev, net_dev, result);
- return result;
-}
-EXPORT_SYMBOL_GPL(wimax_dev_add);
-
-
-/**
- * wimax_dev_rm - Unregister an existing WiMAX device
- *
- * @wimax_dev: WiMAX device descriptor
- *
- * Unregisters a WiMAX device previously registered for use with
- * wimax_add_rm().
- *
- * IMPORTANT! Must call before calling unregister_netdev().
- *
- * After this function returns, you will not get any more user space
- * control requests (via netlink or debugfs) and thus to wimax_dev->ops.
- *
- * Reentrancy control is ensured by setting the state to
- * %__WIMAX_ST_QUIESCING. rfkill operations coming through
- * wimax_*rfkill*() will be stopped by the quiescing state; ops coming
- * from the rfkill subsystem will be stopped by the support being
- * removed by wimax_rfkill_rm().
- */
-void wimax_dev_rm(struct wimax_dev *wimax_dev)
-{
- d_fnstart(3, NULL, "(wimax_dev %p)\n", wimax_dev);
-
- mutex_lock(&wimax_dev->mutex);
- __wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING);
- wimax_debugfs_rm(wimax_dev);
- wimax_id_table_rm(wimax_dev);
- __wimax_state_change(wimax_dev, WIMAX_ST_DOWN);
- mutex_unlock(&wimax_dev->mutex);
- wimax_rfkill_rm(wimax_dev);
- d_fnend(3, NULL, "(wimax_dev %p) = void\n", wimax_dev);
-}
-EXPORT_SYMBOL_GPL(wimax_dev_rm);
-
-
-/* Debug framework control of debug levels */
-struct d_level D_LEVEL[] = {
- D_SUBMODULE_DEFINE(debugfs),
- D_SUBMODULE_DEFINE(id_table),
- D_SUBMODULE_DEFINE(op_msg),
- D_SUBMODULE_DEFINE(op_reset),
- D_SUBMODULE_DEFINE(op_rfkill),
- D_SUBMODULE_DEFINE(op_state_get),
- D_SUBMODULE_DEFINE(stack),
-};
-size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
-
-
-static const struct genl_multicast_group wimax_gnl_mcgrps[] = {
- { .name = "msg", },
-};
-
-struct genl_family wimax_gnl_family __ro_after_init = {
- .name = "WiMAX",
- .version = WIMAX_GNL_VERSION,
- .hdrsize = 0,
- .maxattr = WIMAX_GNL_ATTR_MAX,
- .policy = wimax_gnl_policy,
- .module = THIS_MODULE,
- .small_ops = wimax_gnl_ops,
- .n_small_ops = ARRAY_SIZE(wimax_gnl_ops),
- .mcgrps = wimax_gnl_mcgrps,
- .n_mcgrps = ARRAY_SIZE(wimax_gnl_mcgrps),
-};
-
-
-
-/* Shutdown the wimax stack */
-static
-int __init wimax_subsys_init(void)
-{
- int result;
-
- d_fnstart(4, NULL, "()\n");
- d_parse_params(D_LEVEL, D_LEVEL_SIZE, wimax_debug_params,
- "wimax.debug");
-
- result = genl_register_family(&wimax_gnl_family);
- if (unlikely(result < 0)) {
- pr_err("cannot register generic netlink family: %d\n", result);
- goto error_register_family;
- }
-
- d_fnend(4, NULL, "() = 0\n");
- return 0;
-
-error_register_family:
- d_fnend(4, NULL, "() = %d\n", result);
- return result;
-
-}
-module_init(wimax_subsys_init);
-
-
-/* Shutdown the wimax stack */
-static
-void __exit wimax_subsys_exit(void)
-{
- wimax_id_table_release();
- genl_unregister_family(&wimax_gnl_family);
-}
-module_exit(wimax_subsys_exit);
-
-MODULE_AUTHOR("Intel Corporation <linux-wimax@...el.com>");
-MODULE_DESCRIPTION("Linux WiMAX stack");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/wimax/wimax-internal.h b/drivers/staging/wimax/wimax-internal.h
deleted file mode 100644
index a6b6990642a1..000000000000
--- a/drivers/staging/wimax/wimax-internal.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Linux WiMAX
- * Internal API for kernel space WiMAX stack
- *
- * Copyright (C) 2007 Intel Corporation <linux-wimax@...el.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>
- *
- * This header file is for declarations and definitions internal to
- * the WiMAX stack. For public APIs and documentation, see
- * include/net/wimax.h and include/linux/wimax.h.
- */
-
-#ifndef __WIMAX_INTERNAL_H__
-#define __WIMAX_INTERNAL_H__
-#ifdef __KERNEL__
-
-#ifdef pr_fmt
-#undef pr_fmt
-#endif
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/device.h>
-#include "net-wimax.h"
-
-
-/*
- * Decide if a (locked) device is ready for use
- *
- * Before using the device structure, it must be locked
- * (wimax_dev->mutex). As well, most operations need to call this
- * function to check if the state is the right one.
- *
- * An error value will be returned if the state is not the right
- * one. In that case, the caller should not attempt to use the device
- * and just unlock it.
- */
-static inline __must_check
-int wimax_dev_is_ready(struct wimax_dev *wimax_dev)
-{
- if (wimax_dev->state == __WIMAX_ST_NULL)
- return -EINVAL; /* Device is not even registered! */
- if (wimax_dev->state == WIMAX_ST_DOWN)
- return -ENOMEDIUM;
- if (wimax_dev->state == __WIMAX_ST_QUIESCING)
- return -ESHUTDOWN;
- return 0;
-}
-
-
-static inline
-void __wimax_state_set(struct wimax_dev *wimax_dev, enum wimax_st state)
-{
- wimax_dev->state = state;
-}
-void __wimax_state_change(struct wimax_dev *, enum wimax_st);
-
-#ifdef CONFIG_DEBUG_FS
-void wimax_debugfs_add(struct wimax_dev *);
-void wimax_debugfs_rm(struct wimax_dev *);
-#else
-static inline void wimax_debugfs_add(struct wimax_dev *wimax_dev) {}
-static inline void wimax_debugfs_rm(struct wimax_dev *wimax_dev) {}
-#endif
-
-void wimax_id_table_add(struct wimax_dev *);
-struct wimax_dev *wimax_dev_get_by_genl_info(struct genl_info *, int);
-void wimax_id_table_rm(struct wimax_dev *);
-void wimax_id_table_release(void);
-
-int wimax_rfkill_add(struct wimax_dev *);
-void wimax_rfkill_rm(struct wimax_dev *);
-
-/* generic netlink */
-extern struct genl_family wimax_gnl_family;
-
-/* ops */
-int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info);
-int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info);
-int wimax_gnl_doit_rfkill(struct sk_buff *skb, struct genl_info *info);
-int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info);
-
-#endif /* #ifdef __KERNEL__ */
-#endif /* #ifndef __WIMAX_INTERNAL_H__ */
--
2.30.2
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