Date:   Fri, 24 Mar 2023 12:02:43 -0700
From:   Shannon Nelson <shannon.nelson@....com>
To:     <shannon.nelson@....com>, <brett.creeley@....com>,
        <davem@...emloft.net>, <netdev@...r.kernel.org>, <kuba@...nel.org>
CC:     <drivers@...sando.io>, <leon@...nel.org>, <jiri@...nulli.us>
Subject: [PATCH v6 net-next 14/14] pds_core: Kconfig and pds_core.rst

Documentation and Kconfig hook for building the driver.

Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
 .../device_drivers/ethernet/amd/pds_core.rst  | 143 ++++++++++++++++++
 .../device_drivers/ethernet/index.rst         |   1 +
 MAINTAINERS                                   |   9 ++
 drivers/net/ethernet/amd/Kconfig              |  12 ++
 drivers/net/ethernet/amd/Makefile             |   1 +
 5 files changed, 166 insertions(+)
 create mode 100644 Documentation/networking/device_drivers/ethernet/amd/pds_core.rst

diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
new file mode 100644
index 000000000000..16ed45baa81b
--- /dev/null
+++ b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
@@ -0,0 +1,143 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+========================================================
+Linux Driver for the AMD/Pensando(R) DSC adapter family
+========================================================
+
+Copyright(c) 2023 Advanced Micro Devices, Inc
+
+Identifying the Adapter
+=======================
+
+To find if one or more AMD/Pensando PCI Core devices are installed on the
+host, check for the PCI devices::
+
+  # lspci -d 1dd8:100c
+  b5:00.0 Processing accelerators: Pensando Systems Device 100c
+  b6:00.0 Processing accelerators: Pensando Systems Device 100c
+
+If such devices are listed as above, then the pds_core.ko driver should find
+and configure them for use.  There should be log entries in the kernel
+messages such as these::
+
+  $ dmesg | grep pds_core
+  pds_core 0000:b5:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
+  pds_core 0000:b5:00.0: FW: 1.60.0-73
+  pds_core 0000:b6:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
+  pds_core 0000:b6:00.0: FW: 1.60.0-73
+
+Driver and firmware version information can be gathered with devlink::
+
+  $ devlink dev info pci/0000:b5:00.0
+  pci/0000:b5:00.0:
+    driver pds_core
+    serial_number FLM18420073
+    versions:
+        fixed:
+          asic.id 0x0
+          asic.rev 0x0
+        running:
+          fw 1.51.0-73
+        stored:
+          fw.goldfw 1.15.9-C-22
+          fw.mainfwa 1.60.0-73
+          fw.mainfwb 1.60.0-57
+
+
+Info versions
+=============
+
+The ``pds_core`` driver reports the following versions
+
+.. list-table:: devlink info versions implemented
+   :widths: 5 5 90
+
+   * - Name
+     - Type
+     - Description
+   * - ``fw``
+     - running
+     - Version of firmware running on the device
+   * - ``fw.goldfw``
+     - stored
+     - Version of firmware stored in the goldfw slot
+   * - ``fw.mainfwa``
+     - stored
+     - Version of firmware stored in the mainfwa slot
+   * - ``fw.mainfwb``
+     - stored
+     - Version of firmware stored in the mainfwb slot
+   * - ``asic.id``
+     - fixed
+     - The ASIC type for this device
+   * - ``asic.rev``
+     - fixed
+     - The revision of the ASIC for this device
+
+
+Parameters
+==========
+
+The ``pds_core`` driver implements the following generic
+parameters for controlling the functionality to be made available
+as auxiliary_bus devices.
+
+.. list-table:: Generic parameters implemented
+   :widths: 5 5 8 82
+
+   * - Name
+     - Mode
+     - Type
+     - Description
+   * - ``enable_vnet``
+     - runtime
+     - Boolean
+     - Enables vDPA functionality through an auxiliary_bus device
+
+
+Firmware Management
+===================
+
+The ``flash`` command can update a the DSC firmware.  The downloaded firmware
+will be saved into either of firmware bank 1 or bank 2, whichever is not
+currrently in use, and that bank will be then selected for the next boot.
+
+Health Reporters
+================
+
+The driver supports a devlink health reporter for FW status::
+
+  # devlink health show pci/0000:2b:00.0 reporter fw
+  pci/0000:2b:00.0:
+    reporter fw
+      state healthy error 0 recover 0
+
+
+Enabling the driver
+===================
+
+The driver is enabled via the standard kernel configuration system,
+using the make command::
+
+  make oldconfig/menuconfig/etc.
+
+The driver is located in the menu structure at:
+
+  -> Device Drivers
+    -> Network device support (NETDEVICES [=y])
+      -> Ethernet driver support
+        -> AMD devices
+          -> AMD/Pensando Ethernet PDS_CORE Support
+
+Support
+=======
+
+For general Linux networking support, please use the netdev mailing
+list, which is monitored by AMD/Pensando personnel::
+
+  netdev@...r.kernel.org
+
+For more specific support needs, please use the AMD/Pensando driver support
+email::
+
+  drivers@...sando.io
diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/Documentation/networking/device_drivers/ethernet/index.rst
index 6e9e7012d000..eaaf284e69e6 100644
--- a/Documentation/networking/device_drivers/ethernet/index.rst
+++ b/Documentation/networking/device_drivers/ethernet/index.rst
@@ -13,6 +13,7 @@ Contents:
    3com/3c509
    3com/vortex
    amazon/ena
+   amd/pds_core
    altera/altera_tse
    aquantia/atlantic
    chelsio/cxgb
diff --git a/MAINTAINERS b/MAINTAINERS
index 30ca644d704f..95b5f25a2c06 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1041,6 +1041,15 @@ F:	drivers/gpu/drm/amd/include/vi_structs.h
 F:	include/uapi/linux/kfd_ioctl.h
 F:	include/uapi/linux/kfd_sysfs.h
 
+AMD PDS CORE DRIVER
+M:	Shannon Nelson <shannon.nelson@....com>
+M:	Brett Creeley <brett.creeley@....com>
+M:	drivers@...sando.io
+L:	netdev@...r.kernel.org
+S:	Supported
+F:	Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
+F:	drivers/net/ethernet/amd/pds_core/
+
 AMD SPI DRIVER
 M:	Sanjay R Mehta <sanju.mehta@....com>
 S:	Maintained
diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index ab42f75b9413..235fcacef5c5 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -186,4 +186,16 @@ config AMD_XGBE_HAVE_ECC
 	bool
 	default n
 
+config PDS_CORE
+	tristate "AMD/Pensando Data Systems Core Device Support"
+	depends on 64BIT && PCI
+	help
+	  This enables the support for the AMD/Pensando Core device family of
+	  adapters.  More specific information on this driver can be
+	  found in
+	  <file:Documentation/networking/device_drivers/ethernet/amd/pds_core.rst>.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called pds_core.
+
 endif # NET_VENDOR_AMD
diff --git a/drivers/net/ethernet/amd/Makefile b/drivers/net/ethernet/amd/Makefile
index 42742afe9115..2dcfb84731e1 100644
--- a/drivers/net/ethernet/amd/Makefile
+++ b/drivers/net/ethernet/amd/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_PCNET32) += pcnet32.o
 obj-$(CONFIG_SUN3LANCE) += sun3lance.o
 obj-$(CONFIG_SUNLANCE) += sunlance.o
 obj-$(CONFIG_AMD_XGBE) += xgbe/
+obj-$(CONFIG_PDS_CORE) += pds_core/
-- 
2.17.1

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