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Date: Mon, 8 Jun 2020 17:34:39 +0200
From: Vasily Gorbik <gor@...ux.ibm.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>,
Christian Borntraeger <borntraeger@...ibm.com>,
linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [GIT PULL] s390 patches for the 5.8 merge window
Hello Linus,
please pull s390 changes for 5.8. There are some common code changes to
pci code acked by Bjorn Helgaas:
https://lore.kernel.org/linux-pci/20200507155132.GA6568@bjorn-Precision-5520/
As well as MAINTAINERS file touched to add s390 specific pci documentation.
The following changes since commit ae83d0b416db002fe95601e7f97f64b59514d936:
Linux 5.7-rc2 (2020-04-19 14:35:30 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-5.8-1
for you to fetch changes up to bfa50e1427e4608ce6941d3d0855445fcaa7dbb7:
vfio-ccw: make vfio_ccw_regops variables declarations static (2020-06-04 13:45:51 +0200)
Please note 2 minor merge conflict resolutions below:
diff --cc arch/s390/kernel/smp.c
index 10dbb12eb14d,fc1041257c60..000000000000
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@@ -403,7 -404,12 +404,12 @@@ int smp_find_processor_id(u16 address
return -1;
}
+ void schedule_mcck_handler(void)
+ {
+ pcpu_ec_call(pcpu_devices + smp_processor_id(), ec_mcck_pending);
+ }
+
-bool arch_vcpu_is_preempted(int cpu)
+bool notrace arch_vcpu_is_preempted(int cpu)
{
if (test_cpu_flag_of(CIF_ENABLED_WAIT, cpu))
return false;
diff --cc arch/s390/kvm/vsie.c
index ef05b4e167fb,4fde24a1856e..000000000000
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@@ -1000,9 -1000,9 +1000,6 @@@ static int do_vsie_run(struct kvm_vcpu
handle_last_fault(vcpu, vsie_page);
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
- if (need_resched())
- schedule();
--
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
/* save current guest state of bp isolation override */
Thank you,
Vasily
----------------------------------------------------------------
s390 updates for the 5.8 merge window
- Add support for multi-function devices in pci code.
- Enable PF-VF linking for architectures using the
pdev->no_vf_scan flag (currently just s390).
- Add reipl from NVMe support.
- Get rid of critical section cleanup in entry.S.
- Refactor PNSO CHSC (perform network subchannel operation) in cio
and qeth.
- QDIO interrupts and error handling fixes and improvements, more
refactoring changes.
- Align ioremap() with generic code.
- Accept requests without the prefetch bit set in vfio-ccw.
- Enable path handling via two new regions in vfio-ccw.
- Other small fixes and improvements all over the code.
----------------------------------------------------------------
Alexander Schmidt (1):
s390/pci: Expose new port attribute for PCIe functions
Alexandra Winter (1):
s390/cio, s390/qeth: cleanup PNSO CHSC
Cornelia Huck (1):
vfio-ccw: document possible errors
David Hildenbrand (1):
s390: simplify memory notifier for protecting kdump crash kernel area
Eric Farman (3):
vfio-ccw: Refactor the unregister of the async regions
vfio-ccw: Refactor IRQ handlers
vfio-ccw: Add trace for CRW event
Farhan Ali (5):
vfio-ccw: Introduce new helper functions to free/destroy regions
vfio-ccw: Register a chp_event callback for vfio-ccw
vfio-ccw: Introduce a new schib region
vfio-ccw: Introduce a new CRW region
vfio-ccw: Wire up the CRW irq and CRW region
Gerald Schaefer (1):
Documentation/s390: Update / remove developerWorks web links
Harald Freudenberger (1):
s390/ap: introduce new ap function ap_get_qdev()
Jared Rossi (1):
vfio-ccw: Enable transparent CCW IPL from DASD
Jason J. Herne (2):
s390: nvme ipl
s390: nvme reipl
Julian Wiedmann (14):
s390/qdio: consistently restore the IRQ handler
s390/qdio: tear down thinint indicator after early error
s390/qdio: put thinint indicator after early error
s390/qdio: consolidate thinint init/exit
s390/qdio: do more fine-grained allocation roll-back
s390/qdio: roll-back after queue allocation error
s390/qdio: keep track of allocated queue count
s390/qdio: de-duplicate tiqdio_inbound_processing()
s390/qdio: remove always-true condition
s390/qdio: simplify overlap calculation on Input refill
s390/qdio: refactor ACK processing for primed SBALs
s390/qdio: add IRQ reduction for error SBALs
s390/qdio: fix up qdio_start_irq() kerneldoc
s390/qdio: remove q->first_to_kick
Masahiro Yamada (1):
s390: ptrace: hard-code "s390x" instead of UTS_MACHINE
Niklas Schnelle (3):
PCI/IOV: Introduce pci_iov_sysfs_link() function
s390/pci: create links between PFs and VFs
s390/pci: ioremap() align with generic code
Petr Tesarik (1):
s390/pci: Log new handle in clp_disable_fh()
Pierre Morel (11):
s390/pci: adaptation of iommu to multifunction
s390/pci: define kernel parameters for PCI multifunction
s390/pci: define RID and RID available
s390/pci: create zPCI bus
s390/pci: adapt events for zbus
s390/pci: Adding bus resource
s390/pci: Handling multifunctions
s390/pci: Do not disable PF when VFs exist
s390/pci: Documentation for zPCI
s390/pci: removes wrong PCI multifunction assignment
s390/pci: Documentation update for s390 PCI
Sven Schnelle (2):
s390: add machine check SIGP
s390: remove critical section cleanup from entry.S
Vasily Gorbik (2):
Merge tag 'vfio-ccw-20200603-v2' of https://git.kernel.org/.../kvms390/vfio-ccw into features
vfio-ccw: make vfio_ccw_regops variables declarations static
YueHaibing (2):
s390: Remove two unused inline functions
s390/cio: Remove unused inline function idset_sch_get_first
Documentation/admin-guide/kernel-parameters.txt | 2 +
Documentation/s390/index.rst | 1 +
Documentation/s390/pci.rst | 125 +++++++
Documentation/s390/vfio-ccw.rst | 100 ++++-
Documentation/s390/zfcpdump.rst | 4 +-
MAINTAINERS | 1 +
arch/s390/appldata/appldata_mem.c | 4 -
arch/s390/appldata/appldata_net_sum.c | 4 -
arch/s390/appldata/appldata_os.c | 4 -
arch/s390/include/asm/ccwdev.h | 5 +
arch/s390/include/asm/chsc.h | 62 ++++
arch/s390/include/asm/io.h | 2 +-
arch/s390/include/asm/ipl.h | 11 +
arch/s390/include/asm/nmi.h | 2 +-
arch/s390/include/asm/pci.h | 42 ++-
arch/s390/include/asm/pci_clp.h | 13 +-
arch/s390/include/asm/processor.h | 20 +-
arch/s390/include/asm/qdio.h | 33 --
arch/s390/include/asm/smp.h | 1 +
arch/s390/include/uapi/asm/ipl.h | 25 ++
arch/s390/kernel/Makefile | 5 -
arch/s390/kernel/entry.S | 464 ++++++------------------
arch/s390/kernel/ftrace.c | 16 -
arch/s390/kernel/idle.c | 14 +-
arch/s390/kernel/ipl.c | 209 +++++++++++
arch/s390/kernel/nmi.c | 23 +-
arch/s390/kernel/ptrace.c | 2 +-
arch/s390/kernel/setup.c | 16 +-
arch/s390/kernel/smp.c | 8 +
arch/s390/kvm/kvm-s390.c | 3 -
arch/s390/kvm/vsie.c | 2 -
arch/s390/lib/delay.c | 4 +-
arch/s390/pci/Makefile | 3 +-
arch/s390/pci/pci.c | 225 +++++-------
arch/s390/pci/pci_bus.c | 328 +++++++++++++++++
arch/s390/pci/pci_bus.h | 31 ++
arch/s390/pci/pci_clp.c | 8 +-
arch/s390/pci/pci_event.c | 39 +-
arch/s390/pci/pci_sysfs.c | 4 +-
drivers/iommu/s390-iommu.c | 8 +-
drivers/pci/hotplug/s390_pci_hpc.c | 16 +-
drivers/pci/iov.c | 39 +-
drivers/s390/cio/Makefile | 2 +-
drivers/s390/cio/chsc.c | 40 +-
drivers/s390/cio/chsc.h | 50 +--
drivers/s390/cio/device_ops.c | 23 ++
drivers/s390/cio/idset.c | 12 -
drivers/s390/cio/qdio.h | 16 +-
drivers/s390/cio/qdio_main.c | 299 ++++-----------
drivers/s390/cio/qdio_setup.c | 100 +++--
drivers/s390/cio/qdio_thinint.c | 61 ++--
drivers/s390/cio/vfio_ccw_chp.c | 148 ++++++++
drivers/s390/cio/vfio_ccw_cp.c | 19 +-
drivers/s390/cio/vfio_ccw_drv.c | 165 ++++++++-
drivers/s390/cio/vfio_ccw_ops.c | 65 +++-
drivers/s390/cio/vfio_ccw_private.h | 16 +
drivers/s390/cio/vfio_ccw_trace.c | 1 +
drivers/s390/cio/vfio_ccw_trace.h | 30 ++
drivers/s390/crypto/ap_bus.c | 94 +++--
drivers/s390/crypto/ap_bus.h | 25 +-
drivers/s390/crypto/ap_card.c | 47 ++-
drivers/s390/crypto/ap_queue.c | 10 +-
drivers/s390/net/qeth_l2_main.c | 198 +++++-----
include/linux/pci.h | 8 +
include/uapi/linux/vfio.h | 3 +
include/uapi/linux/vfio_ccw.h | 19 +
66 files changed, 2131 insertions(+), 1248 deletions(-)
create mode 100644 Documentation/s390/pci.rst
create mode 100644 arch/s390/include/asm/chsc.h
create mode 100644 arch/s390/pci/pci_bus.c
create mode 100644 arch/s390/pci/pci_bus.h
create mode 100644 drivers/s390/cio/vfio_ccw_chp.c
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index f2a93c8679e8..e6d4fb2e32d0 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3669,6 +3669,8 @@
may put more devices in an IOMMU group.
force_floating [S390] Force usage of floating interrupts.
nomio [S390] Do not use MIO instructions.
+ norid [S390] ignore the RID field and force use of
+ one PCI domain per PCI function
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.
diff --git a/Documentation/s390/index.rst b/Documentation/s390/index.rst
index f7af2061e406..cf71df5776b4 100644
--- a/Documentation/s390/index.rst
+++ b/Documentation/s390/index.rst
@@ -15,6 +15,7 @@ s390 Architecture
vfio-ccw
zfcpdump
common_io
+ pci
text_files
diff --git a/Documentation/s390/pci.rst b/Documentation/s390/pci.rst
new file mode 100644
index 000000000000..492850bff316
--- /dev/null
+++ b/Documentation/s390/pci.rst
@@ -0,0 +1,125 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========
+S/390 PCI
+=========
+
+Authors:
+ - Pierre Morel
+
+Copyright, IBM Corp. 2020
+
+
+Command line parameters and debugfs entries
+===========================================
+
+Command line parameters
+-----------------------
+
+* nomio
+
+ Do not use PCI Mapped I/O (MIO) instructions.
+
+* norid
+
+ Ignore the RID field and force use of one PCI domain per PCI function.
+
+debugfs entries
+---------------
+
+The S/390 debug feature (s390dbf) generates views to hold various debug results in sysfs directories of the form:
+
+ * /sys/kernel/debug/s390dbf/pci_*/
+
+For example:
+
+ - /sys/kernel/debug/s390dbf/pci_msg/sprintf
+ Holds messages from the processing of PCI events, like machine check handling
+ and setting of global functionality, like UID checking.
+
+ Change the level of logging to be more or less verbose by piping
+ a number between 0 and 6 to /sys/kernel/debug/s390dbf/pci_*/level. For
+ details, see the documentation on the S/390 debug feature at
+ Documentation/s390/s390dbf.rst.
+
+Sysfs entries
+=============
+
+Entries specific to zPCI functions and entries that hold zPCI information.
+
+* /sys/bus/pci/slots/XXXXXXXX
+
+ The slot entries are set up using the function identifier (FID) of the
+ PCI function.
+
+ - /sys/bus/pci/slots/XXXXXXXX/power
+
+ A physical function that currently supports a virtual function cannot be
+ powered off until all virtual functions are removed with:
+ echo 0 > /sys/bus/pci/devices/XXXX:XX:XX.X/sriov_numvf
+
+* /sys/bus/pci/devices/XXXX:XX:XX.X/
+
+ - function_id
+ A zPCI function identifier that uniquely identifies the function in the Z server.
+
+ - function_handle
+ Low-level identifier used for a configured PCI function.
+ It might be useful for debuging.
+
+ - pchid
+ Model-dependent location of the I/O adapter.
+
+ - pfgid
+ PCI function group ID, functions that share identical functionality
+ use a common identifier.
+ A PCI group defines interrupts, IOMMU, IOTLB, and DMA specifics.
+
+ - vfn
+ The virtual function number, from 1 to N for virtual functions,
+ 0 for physical functions.
+
+ - pft
+ The PCI function type
+
+ - port
+ The port corresponds to the physical port the function is attached to.
+ It also gives an indication of the physical function a virtual function
+ is attached to.
+
+ - uid
+ The unique identifier (UID) is defined when configuring an LPAR and is
+ unique in the LPAR.
+
+ - pfip/segmentX
+ The segments determine the isolation of a function.
+ They correspond to the physical path to the function.
+ The more the segments are different, the more the functions are isolated.
+
+Enumeration and hotplug
+=======================
+
+The PCI address consists of four parts: domain, bus, device and function,
+and is of this form: DDDD:BB:dd.f
+
+* When not using multi-functions (norid is set, or the firmware does not
+ support multi-functions):
+
+ - There is only one function per domain.
+
+ - The domain is set from the zPCI function's UID as defined during the
+ LPAR creation.
+
+* When using multi-functions (norid parameter is not set),
+ zPCI functions are addressed differently:
+
+ - There is still only one bus per domain.
+
+ - There can be up to 256 functions per bus.
+
+ - The domain part of the address of all functions for
+ a multi-Function device is set from the zPCI function's UID as defined
+ in the LPAR creation for the function zero.
+
+ - New functions will only be ready for use after the function zero
+ (the function with devfn 0) has been enumerated.
diff --git a/Documentation/s390/vfio-ccw.rst b/Documentation/s390/vfio-ccw.rst
index fca9c4f5bd9c..8aad08a8b8a5 100644
--- a/Documentation/s390/vfio-ccw.rst
+++ b/Documentation/s390/vfio-ccw.rst
@@ -204,15 +204,44 @@ definition of the region is::
__u32 ret_code;
} __packed;
+This region is always available.
+
While starting an I/O request, orb_area should be filled with the
guest ORB, and scsw_area should be filled with the SCSW of the Virtual
Subchannel.
irb_area stores the I/O result.
-ret_code stores a return code for each access of the region.
+ret_code stores a return code for each access of the region. The following
+values may occur:
+
+``0``
+ The operation was successful.
+
+``-EOPNOTSUPP``
+ The orb specified transport mode or an unidentified IDAW format, or the
+ scsw specified a function other than the start function.
+
+``-EIO``
+ A request was issued while the device was not in a state ready to accept
+ requests, or an internal error occurred.
+
+``-EBUSY``
+ The subchannel was status pending or busy, or a request is already active.
+
+``-EAGAIN``
+ A request was being processed, and the caller should retry.
+
+``-EACCES``
+ The channel path(s) used for the I/O were found to be not operational.
+
+``-ENODEV``
+ The device was found to be not operational.
+
+``-EINVAL``
+ The orb specified a chain longer than 255 ccws, or an internal error
+ occurred.
-This region is always available.
vfio-ccw cmd region
-------------------
@@ -231,6 +260,64 @@ This region is exposed via region type VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD.
Currently, CLEAR SUBCHANNEL and HALT SUBCHANNEL use this region.
+command specifies the command to be issued; ret_code stores a return code
+for each access of the region. The following values may occur:
+
+``0``
+ The operation was successful.
+
+``-ENODEV``
+ The device was found to be not operational.
+
+``-EINVAL``
+ A command other than halt or clear was specified.
+
+``-EIO``
+ A request was issued while the device was not in a state ready to accept
+ requests.
+
+``-EAGAIN``
+ A request was being processed, and the caller should retry.
+
+``-EBUSY``
+ The subchannel was status pending or busy while processing a halt request.
+
+vfio-ccw schib region
+---------------------
+
+The vfio-ccw schib region is used to return Subchannel-Information
+Block (SCHIB) data to userspace::
+
+ struct ccw_schib_region {
+ #define SCHIB_AREA_SIZE 52
+ __u8 schib_area[SCHIB_AREA_SIZE];
+ } __packed;
+
+This region is exposed via region type VFIO_REGION_SUBTYPE_CCW_SCHIB.
+
+Reading this region triggers a STORE SUBCHANNEL to be issued to the
+associated hardware.
+
+vfio-ccw crw region
+---------------------
+
+The vfio-ccw crw region is used to return Channel Report Word (CRW)
+data to userspace::
+
+ struct ccw_crw_region {
+ __u32 crw;
+ __u32 pad;
+ } __packed;
+
+This region is exposed via region type VFIO_REGION_SUBTYPE_CCW_CRW.
+
+Reading this region returns a CRW if one that is relevant for this
+subchannel (e.g. one reporting changes in channel path state) is
+pending, or all zeroes if not. If multiple CRWs are pending (including
+possibly chained CRWs), reading this region again will return the next
+one, until no more CRWs are pending and zeroes are returned. This is
+similar to how STORE CHANNEL REPORT WORD works.
+
vfio-ccw operation details
--------------------------
@@ -333,7 +420,14 @@ through DASD/ECKD device online in a guest now and use it as a block
device.
The current code allows the guest to start channel programs via
-START SUBCHANNEL, and to issue HALT SUBCHANNEL and CLEAR SUBCHANNEL.
+START SUBCHANNEL, and to issue HALT SUBCHANNEL, CLEAR SUBCHANNEL,
+and STORE SUBCHANNEL.
+
+Currently all channel programs are prefetched, regardless of the
+p-bit setting in the ORB. As a result, self modifying channel
+programs are not supported. For this reason, IPL has to be handled as
+a special case by a userspace/guest program; this has been implemented
+in QEMU's s390-ccw bios as of QEMU 4.1.
vfio-ccw supports classic (command mode) channel I/O only. Transport
mode (HPF) is not supported.
diff --git a/Documentation/s390/zfcpdump.rst b/Documentation/s390/zfcpdump.rst
index 54e8e7caf7e7..a61de7aa8778 100644
--- a/Documentation/s390/zfcpdump.rst
+++ b/Documentation/s390/zfcpdump.rst
@@ -46,5 +46,5 @@ initramfs with a user space application that writes the dump to a SCSI
partition.
For more information on how to use zfcpdump refer to the s390 'Using the Dump
-Tools book', which is available from
-http://www.ibm.com/developerworks/linux/linux390.
+Tools' book, which is available from IBM Knowledge Center:
+https://www.ibm.com/support/knowledgecenter/linuxonibm/liaaf/lnz_r_dt.html
diff --git a/MAINTAINERS b/MAINTAINERS
index b816a453b10e..1df86d6cd6c2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14662,6 +14662,7 @@ S: Supported
W: http://www.ibm.com/developerworks/linux/linux390/
F: arch/s390/pci/
F: drivers/pci/hotplug/s390_pci_hpc.c
+F: Documentation/s390/pci.rst
S390 VFIO AP DRIVER
M: Tony Krowiak <akrowiak@...ux.ibm.com>
diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
index e68136c3c23a..21c3147bd92a 100644
--- a/arch/s390/appldata/appldata_mem.c
+++ b/arch/s390/appldata/appldata_mem.c
@@ -29,10 +29,6 @@
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be
* updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_mem_data {
u64 timestamp;
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 8bc14b0d1def..59c282ca002f 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -25,10 +25,6 @@
* This is accessed as binary data by z/VM. If changes to it can't be avoided,
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_net_sum_data {
u64 timestamp;
diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c
index 8bf46d705957..5503217366ec 100644
--- a/arch/s390/appldata/appldata_os.c
+++ b/arch/s390/appldata/appldata_os.c
@@ -32,10 +32,6 @@
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be
* updated.
- *
- * The record layout is documented in the Linux for zSeries Device Drivers
- * book:
- * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_os_per_cpu {
u32 per_cpu_user; /* timer ticks spent in user mode */
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
index 865ce1cb86d5..3cfe1eb89838 100644
--- a/arch/s390/include/asm/ccwdev.h
+++ b/arch/s390/include/asm/ccwdev.h
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
+#include <asm/chsc.h>
#include <asm/fcx.h>
#include <asm/irq.h>
#include <asm/schid.h>
@@ -236,4 +237,8 @@ extern void ccw_device_get_schid(struct ccw_device *, struct subchannel_id *);
struct channel_path_desc_fmt0 *ccw_device_get_chp_desc(struct ccw_device *, int);
u8 *ccw_device_get_util_str(struct ccw_device *cdev, int chp_idx);
+int ccw_device_pnso(struct ccw_device *cdev,
+ struct chsc_pnso_area *pnso_area,
+ struct chsc_pnso_resume_token resume_token,
+ int cnc);
#endif /* _S390_CCWDEV_H_ */
diff --git a/arch/s390/include/asm/chsc.h b/arch/s390/include/asm/chsc.h
new file mode 100644
index 000000000000..36ce2d25a5fc
--- /dev/null
+++ b/arch/s390/include/asm/chsc.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s): Alexandra Winter <wintera@...ux.ibm.com>
+ *
+ * Interface for Channel Subsystem Call
+ */
+#ifndef _ASM_S390_CHSC_H
+#define _ASM_S390_CHSC_H
+
+#include <uapi/asm/chsc.h>
+
+/**
+ * struct chsc_pnso_naid_l2 - network address information descriptor
+ * @nit: Network interface token
+ * @addr_lnid: network address and logical network id (VLAN ID)
+ */
+struct chsc_pnso_naid_l2 {
+ u64 nit;
+ struct { u8 mac[6]; u16 lnid; } addr_lnid;
+} __packed;
+
+struct chsc_pnso_resume_token {
+ u64 t1;
+ u64 t2;
+} __packed;
+
+struct chsc_pnso_naihdr {
+ struct chsc_pnso_resume_token resume_token;
+ u32:32;
+ u32 instance;
+ u32:24;
+ u8 naids;
+ u32 reserved[3];
+} __packed;
+
+struct chsc_pnso_area {
+ struct chsc_header request;
+ u8:2;
+ u8 m:1;
+ u8:5;
+ u8:2;
+ u8 ssid:2;
+ u8 fmt:4;
+ u16 sch;
+ u8:8;
+ u8 cssid;
+ u16:16;
+ u8 oc;
+ u32:24;
+ struct chsc_pnso_resume_token resume_token;
+ u32 n:1;
+ u32:31;
+ u32 reserved[3];
+ struct chsc_header response;
+ u32:32;
+ struct chsc_pnso_naihdr naihdr;
+ struct chsc_pnso_naid_l2 entries[0];
+} __packed __aligned(PAGE_SIZE);
+
+#endif /* _ASM_S390_CHSC_H */
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 5a16f500515a..da014e4f8113 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -26,7 +26,7 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
#define IO_SPACE_LIMIT 0
-void __iomem *ioremap(unsigned long offset, unsigned long size);
+void __iomem *ioremap(phys_addr_t addr, size_t size);
void iounmap(volatile void __iomem *addr);
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index b63bd66404b8..7d5cfdda5277 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -21,6 +21,7 @@ struct ipl_parameter_block {
struct ipl_pb0_common common;
struct ipl_pb0_fcp fcp;
struct ipl_pb0_ccw ccw;
+ struct ipl_pb0_nvme nvme;
char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
};
} __packed __aligned(PAGE_SIZE);
@@ -30,6 +31,11 @@ struct ipl_parameter_block {
#define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
sizeof(struct ipl_pb0_fcp))
#define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
+
+#define IPL_BP_NVME_LEN (sizeof(struct ipl_pl_hdr) + \
+ sizeof(struct ipl_pb0_nvme))
+#define IPL_BP0_NVME_LEN (sizeof(struct ipl_pb0_nvme))
+
#define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
sizeof(struct ipl_pb0_ccw))
#define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
@@ -59,6 +65,7 @@ enum ipl_type {
IPL_TYPE_FCP = 4,
IPL_TYPE_FCP_DUMP = 8,
IPL_TYPE_NSS = 16,
+ IPL_TYPE_NVME = 32,
};
struct ipl_info
@@ -73,6 +80,10 @@ struct ipl_info
u64 wwpn;
u64 lun;
} fcp;
+ struct {
+ u32 fid;
+ u32 nsid;
+ } nvme;
struct {
char name[NSS_NAME_SIZE + 1];
} nss;
diff --git a/arch/s390/include/asm/nmi.h b/arch/s390/include/asm/nmi.h
index b160da8fa14b..5afee80cff58 100644
--- a/arch/s390/include/asm/nmi.h
+++ b/arch/s390/include/asm/nmi.h
@@ -99,7 +99,7 @@ int nmi_alloc_per_cpu(struct lowcore *lc);
void nmi_free_per_cpu(struct lowcore *lc);
void s390_handle_mcck(void);
-void s390_do_machine_check(struct pt_regs *regs);
+int s390_do_machine_check(struct pt_regs *regs);
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NMI_H */
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 7485ee561fec..99b92c3e46b0 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -22,12 +22,17 @@ int pci_domain_nr(struct pci_bus *);
int pci_proc_domain(struct pci_bus *);
#define ZPCI_BUS_NR 0 /* default bus number */
-#define ZPCI_DEVFN 0 /* default device number */
#define ZPCI_NR_DMA_SPACES 1
#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
+#ifdef PCI
+#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
+# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
+#endif
+#endif /* PCI */
+
/* PCI Function Controls */
#define ZPCI_FC_FN_ENABLED 0x80
#define ZPCI_FC_ERROR 0x40
@@ -94,10 +99,26 @@ struct zpci_bar_struct {
struct s390_domain;
+#define ZPCI_FUNCTIONS_PER_BUS 256
+struct zpci_bus {
+ struct kref kref;
+ struct pci_bus *bus;
+ struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
+ struct list_head resources;
+ struct list_head bus_next;
+ struct resource bus_resource;
+ int pchid;
+ int domain_nr;
+ bool multifunction;
+ enum pci_bus_speed max_bus_speed;
+};
+
/* Private data per function */
struct zpci_dev {
- struct pci_bus *bus;
+ struct zpci_bus *zbus;
struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
+ struct list_head bus_next;
+ struct kref kref;
struct hotplug_slot hotplug_slot;
enum zpci_state state;
@@ -107,7 +128,12 @@ struct zpci_dev {
u16 pchid; /* physical channel ID */
u8 pfgid; /* function group ID */
u8 pft; /* pci function type */
- u16 domain;
+ u8 port;
+ u8 rid_available : 1;
+ u8 has_hp_slot : 1;
+ u8 is_physfn : 1;
+ u8 reserved : 5;
+ unsigned int devfn; /* DEVFN part of the RID*/
struct mutex lock;
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
@@ -167,6 +193,7 @@ static inline bool zdev_enabled(struct zpci_dev *zdev)
extern const struct attribute_group *zpci_attr_groups[];
extern unsigned int s390_pci_force_floating __initdata;
+extern unsigned int s390_pci_no_rid;
/* -----------------------------------------------------------------------------
Prototypes
@@ -227,7 +254,14 @@ static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
/* Helpers */
static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
{
- return pdev->sysdata;
+ struct zpci_bus *zbus = pdev->sysdata;
+
+ return zbus->function[pdev->devfn];
+}
+
+static inline struct zpci_dev *to_zpci_dev(struct device *dev)
+{
+ return to_zpci(to_pci_dev(dev));
}
struct zpci_dev *get_zdev_by_fid(u32);
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h
index bd2cb4ea7d93..eb51272dd2cc 100644
--- a/arch/s390/include/asm/pci_clp.h
+++ b/arch/s390/include/asm/pci_clp.h
@@ -93,7 +93,10 @@ struct clp_req_query_pci {
struct clp_rsp_query_pci {
struct clp_rsp_hdr hdr;
u16 vfn; /* virtual fn number */
- u16 : 6;
+ u16 : 3;
+ u16 rid_avail : 1;
+ u16 is_physfn : 1;
+ u16 reserved1 : 1;
u16 mio_addr_avail : 1;
u16 util_str_avail : 1; /* utility string available? */
u16 pfgid : 8; /* pci function group id */
@@ -102,12 +105,16 @@ struct clp_rsp_query_pci {
u16 pchid;
__le32 bar[PCI_STD_NUM_BARS];
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
- u32 : 16;
+ u16 : 12;
+ u16 port : 4;
u8 fmb_len;
u8 pft; /* pci function type */
u64 sdma; /* start dma as */
u64 edma; /* end dma as */
- u32 reserved[11];
+#define ZPCI_RID_MASK_DEVFN 0x00ff
+ u16 rid; /* BUS/DEVFN PCI address */
+ u16 reserved0;
+ u32 reserved[10];
u32 uid; /* user defined id */
u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
u32 reserved2[16];
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 555d148ccf32..962da04234af 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -14,17 +14,15 @@
#include <linux/bits.h>
-#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
-#define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */
-#define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */
-#define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */
-#define CIF_FPU 4 /* restore FPU registers */
-#define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */
-#define CIF_ENABLED_WAIT 6 /* in enabled wait state */
-#define CIF_MCCK_GUEST 7 /* machine check happening in guest */
-#define CIF_DEDICATED_CPU 8 /* this CPU is dedicated */
-
-#define _CIF_MCCK_PENDING BIT(CIF_MCCK_PENDING)
+#define CIF_ASCE_PRIMARY 0 /* primary asce needs fixup / uaccess */
+#define CIF_ASCE_SECONDARY 1 /* secondary asce needs fixup / uaccess */
+#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
+#define CIF_FPU 3 /* restore FPU registers */
+#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */
+#define CIF_ENABLED_WAIT 5 /* in enabled wait state */
+#define CIF_MCCK_GUEST 6 /* machine check happening in guest */
+#define CIF_DEDICATED_CPU 7 /* this CPU is dedicated */
+
#define _CIF_ASCE_PRIMARY BIT(CIF_ASCE_PRIMARY)
#define _CIF_ASCE_SECONDARY BIT(CIF_ASCE_SECONDARY)
#define _CIF_NOHZ_DELAY BIT(CIF_NOHZ_DELAY)
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 86a3796e9be8..e69dbf438f99 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -365,34 +365,6 @@ struct qdio_initialize {
struct qdio_outbuf_state *output_sbal_state_array;
};
-/**
- * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc()
- * @l3_ipv6_addr: entry contains IPv6 address
- * @l3_ipv4_addr: entry contains IPv4 address
- * @l2_addr_lnid: entry contains MAC address and VLAN ID
- */
-enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid};
-
-/**
- * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc()
- * @nit: Network interface token
- * @addr: Address of one of the three types
- *
- * The struct is passed to the callback function by qdio_brinfo_desc()
- */
-struct qdio_brinfo_entry_l3_ipv6 {
- u64 nit;
- struct { unsigned char _s6_addr[16]; } addr;
-} __packed;
-struct qdio_brinfo_entry_l3_ipv4 {
- u64 nit;
- struct { uint32_t _s_addr; } addr;
-} __packed;
-struct qdio_brinfo_entry_l2 {
- u64 nit;
- struct { u8 mac[6]; u16 lnid; } addr_lnid;
-} __packed;
-
#define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
#define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */
#define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */
@@ -423,10 +395,5 @@ extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr,
extern int qdio_shutdown(struct ccw_device *, int);
extern int qdio_free(struct ccw_device *);
extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
-extern int qdio_pnso_brinfo(struct subchannel_id schid,
- int cnc, u16 *response,
- void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
- void *entry),
- void *priv);
#endif /* __QDIO_H__ */
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index 231a51e870fe..7326f110d48c 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -58,5 +58,6 @@ extern int smp_rescan_cpus(void);
extern void __noreturn cpu_die(void);
extern void __cpu_die(unsigned int cpu);
extern int __cpu_disable(void);
+extern void schedule_mcck_handler(void);
#endif /* __ASM_SMP_H */
diff --git a/arch/s390/include/uapi/asm/ipl.h b/arch/s390/include/uapi/asm/ipl.h
index 451ba7d08905..d1ecd5d722a0 100644
--- a/arch/s390/include/uapi/asm/ipl.h
+++ b/arch/s390/include/uapi/asm/ipl.h
@@ -27,6 +27,7 @@ enum ipl_pbt {
IPL_PBT_FCP = 0,
IPL_PBT_SCP_DATA = 1,
IPL_PBT_CCW = 2,
+ IPL_PBT_NVME = 4,
};
/* IPL Parameter Block 0 with common fields */
@@ -67,6 +68,30 @@ struct ipl_pb0_fcp {
#define IPL_PB0_FCP_OPT_IPL 0x10
#define IPL_PB0_FCP_OPT_DUMP 0x20
+/* IPL Parameter Block 0 for NVMe */
+struct ipl_pb0_nvme {
+ __u32 len;
+ __u8 pbt;
+ __u8 reserved1[3];
+ __u8 loadparm[8];
+ __u8 reserved2[304];
+ __u8 opt;
+ __u8 reserved3[3];
+ __u32 fid;
+ __u8 reserved4[12];
+ __u32 nsid;
+ __u8 reserved5[4];
+ __u32 bootprog;
+ __u8 reserved6[12];
+ __u64 br_lba;
+ __u32 scp_data_len;
+ __u8 reserved7[260];
+ __u8 scp_data[];
+} __packed;
+
+#define IPL_PB0_NVME_OPT_IPL 0x10
+#define IPL_PB0_NVME_OPT_DUMP 0x20
+
/* IPL Parameter Block 0 for CCW */
struct ipl_pb0_ccw {
__u32 len;
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 75f26d775027..a8f136943deb 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -33,11 +33,6 @@ CFLAGS_stacktrace.o += -fno-optimize-sibling-calls
CFLAGS_dumpstack.o += -fno-optimize-sibling-calls
CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls
-#
-# Pass UTS_MACHINE for user_regset definition
-#
-CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
-
obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 3ae64914bd14..50ff6dd0f995 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -55,14 +55,11 @@ _TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
-_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \
- _CIF_ASCE_SECONDARY | _CIF_FPU)
+_CIF_WORK = (_CIF_ASCE_PRIMARY | _CIF_ASCE_SECONDARY | _CIF_FPU)
_PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART)
_LPP_OFFSET = __LC_LPP
-#define BASED(name) name-cleanup_critical(%r13)
-
.macro TRACE_IRQS_ON
#ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0
@@ -116,17 +113,39 @@ _LPP_OFFSET = __LC_LPP
.macro SWITCH_ASYNC savearea,timer
tmhh %r8,0x0001 # interrupting from user ?
jnz 2f
+#if IS_ENABLED(CONFIG_KVM)
lgr %r14,%r9
- cghi %r14,__LC_RETURN_LPSWE
- je 0f
- slg %r14,BASED(.Lcritical_start)
- clg %r14,BASED(.Lcritical_length)
- jhe 1f
-0:
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
+ jhe 0f
lghi %r11,\savearea # inside critical section, do cleanup
- brasl %r14,cleanup_critical
- tmhh %r8,0x0001 # retest problem state after cleanup
- jnz 2f
+ brasl %r14,.Lcleanup_sie
+#endif
+0: larl %r13,.Lpsw_idle_exit
+ cgr %r13,%r9
+ jne 1f
+
+ mvc __CLOCK_IDLE_EXIT(8,%r2), __LC_INT_CLOCK
+ mvc __TIMER_IDLE_EXIT(8,%r2), __LC_ASYNC_ENTER_TIMER
+ # account system time going idle
+ ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
+
+ lg %r13,__LC_STEAL_TIMER
+ alg %r13,__CLOCK_IDLE_ENTER(%r2)
+ slg %r13,__LC_LAST_UPDATE_CLOCK
+ stg %r13,__LC_STEAL_TIMER
+
+ mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
+
+ lg %r13,__LC_SYSTEM_TIMER
+ alg %r13,__LC_LAST_UPDATE_TIMER
+ slg %r13,__TIMER_IDLE_ENTER(%r2)
+ stg %r13,__LC_SYSTEM_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
+
+ nihh %r8,0xfcfd # clear wait state and irq bits
1: lg %r14,__LC_ASYNC_STACK # are we already on the target stack?
slgr %r14,%r15
srag %r14,%r14,STACK_SHIFT
@@ -152,12 +171,30 @@ _LPP_OFFSET = __LC_LPP
mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
.endm
- .macro REENABLE_IRQS
+ .macro RESTORE_SM_CLEAR_PER
stg %r8,__LC_RETURN_PSW
ni __LC_RETURN_PSW,0xbf
ssm __LC_RETURN_PSW
.endm
+ .macro ENABLE_INTS
+ stosm __SF_EMPTY(%r15),3
+ .endm
+
+ .macro ENABLE_INTS_TRACE
+ TRACE_IRQS_ON
+ ENABLE_INTS
+ .endm
+
+ .macro DISABLE_INTS
+ stnsm __SF_EMPTY(%r15),0xfc
+ .endm
+
+ .macro DISABLE_INTS_TRACE
+ DISABLE_INTS
+ TRACE_IRQS_OFF
+ .endm
+
.macro STCK savearea
#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
.insn s,0xb27c0000,\savearea # store clock fast
@@ -254,8 +291,6 @@ ENTRY(__switch_to)
BR_EX %r14
ENDPROC(__switch_to)
-.L__critical_start:
-
#if IS_ENABLED(CONFIG_KVM)
/*
* sie64a calling convention:
@@ -288,7 +323,6 @@ ENTRY(sie64a)
BPEXIT __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_entry:
sie 0(%r14)
-.Lsie_exit:
BPOFF
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
.Lsie_skip:
@@ -341,7 +375,6 @@ EXPORT_SYMBOL(sie_exit)
ENTRY(system_call)
stpt __LC_SYNC_ENTER_TIMER
-.Lsysc_stmg:
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
BPOFF
lg %r12,__LC_CURRENT
@@ -350,7 +383,6 @@ ENTRY(system_call)
.Lsysc_per:
lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
-.Lsysc_vtime:
UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
stmg %r0,%r7,__PT_R0(%r11)
@@ -358,6 +390,7 @@ ENTRY(system_call)
mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
stg %r14,__PT_FLAGS(%r11)
+ ENABLE_INTS
.Lsysc_do_svc:
# clear user controlled register to prevent speculative use
xgr %r0,%r0
@@ -393,26 +426,26 @@ ENTRY(system_call)
jnz .Lsysc_work
TSTMSK __TI_flags(%r12),_TIF_WORK
jnz .Lsysc_work # check for work
- TSTMSK __LC_CPU_FLAGS,_CIF_WORK
+ TSTMSK __LC_CPU_FLAGS,(_CIF_WORK-_CIF_FPU)
jnz .Lsysc_work
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
.Lsysc_restore:
+ DISABLE_INTS
+ TSTMSK __LC_CPU_FLAGS, _CIF_FPU
+ jz .Lsysc_skip_fpu
+ brasl %r14,load_fpu_regs
+.Lsysc_skip_fpu:
lg %r14,__LC_VDSO_PER_CPU
- lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
-.Lsysc_exit_timer:
stpt __LC_EXIT_TIMER
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
- lmg %r11,%r15,__PT_R11(%r11)
- b __LC_RETURN_LPSWE(%r0)
-.Lsysc_done:
+ lmg %r0,%r15,__PT_R0(%r11)
+ b __LC_RETURN_LPSWE
#
# One of the work bits is on. Find out which one.
#
.Lsysc_work:
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jo .Lsysc_mcck_pending
TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
jo .Lsysc_reschedule
TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL_RESTART
@@ -436,11 +469,9 @@ ENTRY(system_call)
jo .Lsysc_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
jo .Lsysc_notify_resume
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- jo .Lsysc_vxrs
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lsysc_asce
- j .Lsysc_return # beware of critical section cleanup
+ j .Lsysc_return
#
# _TIF_NEED_RESCHED is set, call schedule
@@ -449,13 +480,6 @@ ENTRY(system_call)
larl %r14,.Lsysc_return
jg schedule
-#
-# _CIF_MCCK_PENDING is set, call handler
-#
-.Lsysc_mcck_pending:
- larl %r14,.Lsysc_return
- jg s390_handle_mcck # TIF bit will be cleared by handler
-
#
# _CIF_ASCE_PRIMARY and/or _CIF_ASCE_SECONDARY set, load user space asce
#
@@ -475,12 +499,6 @@ ENTRY(system_call)
larl %r14,.Lsysc_return
jg set_fs_fixup
-#
-# CIF_FPU is set, restore floating-point controls and floating-point registers.
-#
-.Lsysc_vxrs:
- larl %r14,.Lsysc_return
- jg load_fpu_regs
#
# _TIF_SIGPENDING is set, call do_signal
@@ -564,7 +582,6 @@ ENTRY(system_call)
jnh .Lsysc_tracenogo
sllg %r8,%r2,3
lg %r9,0(%r8,%r10)
-.Lsysc_tracego:
lmg %r3,%r7,__PT_R3(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lg %r2,__PT_ORIG_GPR2(%r11)
@@ -585,8 +602,6 @@ ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15)
lg %r12,__LC_CURRENT
brasl %r14,schedule_tail
- TRACE_IRQS_ON
- ssm __LC_SVC_NEW_PSW # reenable interrupts
tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
jne .Lsysc_tracenogo
# it's a kernel thread
@@ -620,15 +635,16 @@ ENTRY(pgm_check_handler)
lghi %r10,1
0: lg %r12,__LC_CURRENT
lghi %r11,0
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_PGM_OLD_PSW
tmhh %r8,0x0001 # test problem state bit
jnz 3f # -> fault in user space
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in sie64a
lgr %r14,%r9
- slg %r14,BASED(.Lsie_critical_start)
- clg %r14,BASED(.Lsie_critical_length)
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
jhe 1f
lg %r14,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
@@ -680,7 +696,7 @@ ENTRY(pgm_check_handler)
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
-6: REENABLE_IRQS
+6: RESTORE_SM_CLEAR_PER
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
larl %r1,pgm_check_table
llgh %r10,__PT_INT_CODE+2(%r11)
@@ -702,7 +718,7 @@ ENTRY(pgm_check_handler)
# PER event in supervisor state, must be kprobes
#
.Lpgm_kprobe:
- REENABLE_IRQS
+ RESTORE_SM_CLEAR_PER
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_per_trap
@@ -713,11 +729,10 @@ ENTRY(pgm_check_handler)
#
.Lpgm_svcper:
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
- lghi %r13,__TASK_thread
larl %r14,.Lsysc_per
stg %r14,__LC_RETURN_PSW+8
lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
- lpswe __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
+ lpswe __LC_RETURN_PSW # branch to .Lsysc_per
ENDPROC(pgm_check_handler)
/*
@@ -729,7 +744,6 @@ ENTRY(io_int_handler)
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_IO_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
stmg %r0,%r7,__PT_R0(%r11)
@@ -749,7 +763,12 @@ ENTRY(io_int_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ
jo .Lio_restore
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tmhh %r8,0x300
+ jz 1f
TRACE_IRQS_OFF
+1:
+#endif
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
.Lio_loop:
lgr %r2,%r11 # pass pointer to pt_regs
@@ -767,25 +786,27 @@ ENTRY(io_int_handler)
j .Lio_loop
.Lio_return:
LOCKDEP_SYS_EXIT
- TRACE_IRQS_ON
-.Lio_tif:
TSTMSK __TI_flags(%r12),_TIF_WORK
jnz .Lio_work # there is work to do (signals etc.)
TSTMSK __LC_CPU_FLAGS,_CIF_WORK
jnz .Lio_work
.Lio_restore:
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tm __PT_PSW(%r11),3
+ jno 0f
+ TRACE_IRQS_ON
+0:
+#endif
lg %r14,__LC_VDSO_PER_CPU
- lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lio_exit_kernel
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
-.Lio_exit_timer:
stpt __LC_EXIT_TIMER
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
.Lio_exit_kernel:
- lmg %r11,%r15,__PT_R11(%r11)
- b __LC_RETURN_LPSWE(%r0)
+ lmg %r0,%r15,__PT_R0(%r11)
+ b __LC_RETURN_LPSWE
.Lio_done:
#
@@ -813,9 +834,6 @@ ENTRY(io_int_handler)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
- # TRACE_IRQS_ON already done at .Lio_return, call
- # TRACE_IRQS_OFF to keep things symmetrical
- TRACE_IRQS_OFF
brasl %r14,preempt_schedule_irq
j .Lio_return
#else
@@ -835,9 +853,6 @@ ENTRY(io_int_handler)
#
# One of the work bits is on. Find out which one.
#
-.Lio_work_tif:
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jo .Lio_mcck_pending
TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
jo .Lio_reschedule
#ifdef CONFIG_LIVEPATCH
@@ -854,15 +869,6 @@ ENTRY(io_int_handler)
jo .Lio_vxrs
TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
jnz .Lio_asce
- j .Lio_return # beware of critical section cleanup
-
-#
-# _CIF_MCCK_PENDING is set, call handler
-#
-.Lio_mcck_pending:
- # TRACE_IRQS_ON already done at .Lio_return
- brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
- TRACE_IRQS_OFF
j .Lio_return
#
@@ -895,23 +901,19 @@ ENTRY(io_int_handler)
# _TIF_GUARDED_STORAGE is set, call guarded_storage_load
#
.Lio_guarded_storage:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,gs_load_bc_cb
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
# _TIF_NEED_RESCHED is set, call schedule
#
.Lio_reschedule:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
brasl %r14,schedule # call scheduler
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
@@ -928,24 +930,20 @@ ENTRY(io_int_handler)
# _TIF_SIGPENDING or is set, call do_signal
#
.Lio_sigpending:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
#
# _TIF_NOTIFY_RESUME or is set, call do_notify_resume
#
.Lio_notify_resume:
- # TRACE_IRQS_ON already done at .Lio_return
- ssm __LC_SVC_NEW_PSW # reenable interrupts
+ ENABLE_INTS_TRACE
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_notify_resume
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- TRACE_IRQS_OFF
+ DISABLE_INTS_TRACE
j .Lio_return
ENDPROC(io_int_handler)
@@ -958,7 +956,6 @@ ENTRY(ext_int_handler)
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_EXT_OLD_PSW
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER
stmg %r0,%r7,__PT_R0(%r11)
@@ -981,7 +978,12 @@ ENTRY(ext_int_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ
jo .Lio_restore
+#if IS_ENABLED(CONFIG_TRACE_IRQFLAGS)
+ tmhh %r8,0x300
+ jz 1f
TRACE_IRQS_OFF
+1:
+#endif
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
lghi %r3,EXT_INTERRUPT
@@ -990,11 +992,11 @@ ENTRY(ext_int_handler)
ENDPROC(ext_int_handler)
/*
- * Load idle PSW. The second "half" of this function is in .Lcleanup_idle.
+ * Load idle PSW.
*/
ENTRY(psw_idle)
stg %r3,__SF_EMPTY(%r15)
- larl %r1,.Lpsw_idle_lpsw+4
+ larl %r1,.Lpsw_idle_exit
stg %r1,__SF_EMPTY+8(%r15)
larl %r1,smp_cpu_mtid
llgf %r1,0(%r1)
@@ -1006,10 +1008,9 @@ ENTRY(psw_idle)
BPON
STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2)
-.Lpsw_idle_lpsw:
lpswe __SF_EMPTY(%r15)
+.Lpsw_idle_exit:
BR_EX %r14
-.Lpsw_idle_end:
ENDPROC(psw_idle)
/*
@@ -1020,6 +1021,7 @@ ENDPROC(psw_idle)
* of the register contents at return from io or a system call.
*/
ENTRY(save_fpu_regs)
+ stnsm __SF_EMPTY(%r15),0xfc
lg %r2,__LC_CURRENT
aghi %r2,__TASK_thread
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
@@ -1051,6 +1053,7 @@ ENTRY(save_fpu_regs)
.Lsave_fpu_regs_done:
oi __LC_CPU_FLAGS+7,_CIF_FPU
.Lsave_fpu_regs_exit:
+ ssm __SF_EMPTY(%r15)
BR_EX %r14
.Lsave_fpu_regs_end:
ENDPROC(save_fpu_regs)
@@ -1102,8 +1105,6 @@ load_fpu_regs:
.Lload_fpu_regs_end:
ENDPROC(load_fpu_regs)
-.L__critical_end:
-
/*
* Machine check handler routines
*/
@@ -1116,7 +1117,6 @@ ENTRY(mcck_int_handler)
lam %a0,%a15,__LC_AREGS_SAVE_AREA-4095(%r1) # validate acrs
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# validate gprs
lg %r12,__LC_CURRENT
- larl %r13,cleanup_critical
lmg %r8,%r9,__LC_MCK_OLD_PSW
TSTMSK __LC_MCCK_CODE,MCCK_CODE_SYSTEM_DAMAGE
jo .Lmcck_panic # yes -> rest of mcck code invalid
@@ -1202,15 +1202,13 @@ ENTRY(mcck_int_handler)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,s390_do_machine_check
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jno .Lmcck_return
+ cghi %r2,0
+ je .Lmcck_return
lg %r1,__LC_KERNEL_STACK # switch to kernel stack
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
- TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING
- jno .Lmcck_return
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
TRACE_IRQS_ON
@@ -1280,265 +1278,23 @@ ENTRY(stack_overflow)
ENDPROC(stack_overflow)
#endif
-ENTRY(cleanup_critical)
- cghi %r9,__LC_RETURN_LPSWE
- je .Lcleanup_lpswe
-#if IS_ENABLED(CONFIG_KVM)
- clg %r9,BASED(.Lcleanup_table_sie) # .Lsie_gmap
- jl 0f
- clg %r9,BASED(.Lcleanup_table_sie+8)# .Lsie_done
- jl .Lcleanup_sie
-#endif
- clg %r9,BASED(.Lcleanup_table) # system_call
- jl 0f
- clg %r9,BASED(.Lcleanup_table+8) # .Lsysc_do_svc
- jl .Lcleanup_system_call
- clg %r9,BASED(.Lcleanup_table+16) # .Lsysc_tif
- jl 0f
- clg %r9,BASED(.Lcleanup_table+24) # .Lsysc_restore
- jl .Lcleanup_sysc_tif
- clg %r9,BASED(.Lcleanup_table+32) # .Lsysc_done
- jl .Lcleanup_sysc_restore
- clg %r9,BASED(.Lcleanup_table+40) # .Lio_tif
- jl 0f
- clg %r9,BASED(.Lcleanup_table+48) # .Lio_restore
- jl .Lcleanup_io_tif
- clg %r9,BASED(.Lcleanup_table+56) # .Lio_done
- jl .Lcleanup_io_restore
- clg %r9,BASED(.Lcleanup_table+64) # psw_idle
- jl 0f
- clg %r9,BASED(.Lcleanup_table+72) # .Lpsw_idle_end
- jl .Lcleanup_idle
- clg %r9,BASED(.Lcleanup_table+80) # save_fpu_regs
- jl 0f
- clg %r9,BASED(.Lcleanup_table+88) # .Lsave_fpu_regs_end
- jl .Lcleanup_save_fpu_regs
- clg %r9,BASED(.Lcleanup_table+96) # load_fpu_regs
- jl 0f
- clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end
- jl .Lcleanup_load_fpu_regs
-0: BR_EX %r14,%r11
-ENDPROC(cleanup_critical)
-
- .align 8
-.Lcleanup_table:
- .quad system_call
- .quad .Lsysc_do_svc
- .quad .Lsysc_tif
- .quad .Lsysc_restore
- .quad .Lsysc_done
- .quad .Lio_tif
- .quad .Lio_restore
- .quad .Lio_done
- .quad psw_idle
- .quad .Lpsw_idle_end
- .quad save_fpu_regs
- .quad .Lsave_fpu_regs_end
- .quad load_fpu_regs
- .quad .Lload_fpu_regs_end
-
#if IS_ENABLED(CONFIG_KVM)
-.Lcleanup_table_sie:
- .quad .Lsie_gmap
- .quad .Lsie_done
-
.Lcleanup_sie:
- cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt?
- je 1f
- slg %r9,BASED(.Lsie_crit_mcck_start)
- clg %r9,BASED(.Lsie_crit_mcck_length)
- jh 1f
- oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
-1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+ cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt?
+ je 1f
+ larl %r13,.Lsie_entry
+ slgr %r9,%r13
+ larl %r13,.Lsie_skip
+ clgr %r9,%r13
+ jh 1f
+ oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
+1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
BR_EX %r14,%r11
-#endif
-.Lcleanup_system_call:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_system_call_insn)
- jh 0f
- mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: # check if stmg has been executed
- clg %r9,BASED(.Lcleanup_system_call_insn+8)
- jh 0f
- mvc __LC_SAVE_AREA_SYNC(64),0(%r11)
-0: # check if base register setup + TIF bit load has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+16)
- jhe 0f
- # set up saved register r12 task struct pointer
- stg %r12,32(%r11)
- # set up saved register r13 __TASK_thread offset
- mvc 40(8,%r11),BASED(.Lcleanup_system_call_const)
-0: # check if the user time update has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+24)
- jh 0f
- lg %r15,__LC_EXIT_TIMER
- slg %r15,__LC_SYNC_ENTER_TIMER
- alg %r15,__LC_USER_TIMER
- stg %r15,__LC_USER_TIMER
-0: # check if the system time update has been done
- clg %r9,BASED(.Lcleanup_system_call_insn+32)
- jh 0f
- lg %r15,__LC_LAST_UPDATE_TIMER
- slg %r15,__LC_EXIT_TIMER
- alg %r15,__LC_SYSTEM_TIMER
- stg %r15,__LC_SYSTEM_TIMER
-0: # update accounting time stamp
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
- BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
- # set up saved register r11
- lg %r15,__LC_KERNEL_STACK
- la %r9,STACK_FRAME_OVERHEAD(%r15)
- stg %r9,24(%r11) # r11 pt_regs pointer
- # fill pt_regs
- mvc __PT_R8(64,%r9),__LC_SAVE_AREA_SYNC
- stmg %r0,%r7,__PT_R0(%r9)
- mvc __PT_PSW(16,%r9),__LC_SVC_OLD_PSW
- mvc __PT_INT_CODE(4,%r9),__LC_SVC_ILC
- xc __PT_FLAGS(8,%r9),__PT_FLAGS(%r9)
- mvi __PT_FLAGS+7(%r9),_PIF_SYSCALL
- # setup saved register r15
- stg %r15,56(%r11) # r15 stack pointer
- # set new psw address and exit
- larl %r9,.Lsysc_do_svc
- BR_EX %r14,%r11
-.Lcleanup_system_call_insn:
- .quad system_call
- .quad .Lsysc_stmg
- .quad .Lsysc_per
- .quad .Lsysc_vtime+36
- .quad .Lsysc_vtime+42
-.Lcleanup_system_call_const:
- .quad __TASK_thread
-
-.Lcleanup_sysc_tif:
- larl %r9,.Lsysc_tif
- BR_EX %r14,%r11
-
-.Lcleanup_sysc_restore:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_sysc_restore_insn)
- jh 0f
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: clg %r9,BASED(.Lcleanup_sysc_restore_insn+8)
- je 1f
- lg %r9,24(%r11) # get saved pointer to pt_regs
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
- mvc 0(64,%r11),__PT_R8(%r9)
- lmg %r0,%r7,__PT_R0(%r9)
-.Lcleanup_lpswe:
-1: lmg %r8,%r9,__LC_RETURN_PSW
- BR_EX %r14,%r11
-.Lcleanup_sysc_restore_insn:
- .quad .Lsysc_exit_timer
- .quad .Lsysc_done - 4
-
-.Lcleanup_io_tif:
- larl %r9,.Lio_tif
- BR_EX %r14,%r11
-
-.Lcleanup_io_restore:
- # check if stpt has been executed
- clg %r9,BASED(.Lcleanup_io_restore_insn)
- jh 0f
- mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: clg %r9,BASED(.Lcleanup_io_restore_insn+8)
- je 1f
- lg %r9,24(%r11) # get saved r11 pointer to pt_regs
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
- mvc 0(64,%r11),__PT_R8(%r9)
- lmg %r0,%r7,__PT_R0(%r9)
-1: lmg %r8,%r9,__LC_RETURN_PSW
- BR_EX %r14,%r11
-.Lcleanup_io_restore_insn:
- .quad .Lio_exit_timer
- .quad .Lio_done - 4
-
-.Lcleanup_idle:
- ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
- # copy interrupt clock & cpu timer
- mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK
- mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER
- cghi %r11,__LC_SAVE_AREA_ASYNC
- je 0f
- mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK
- mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER
-0: # check if stck & stpt have been executed
- clg %r9,BASED(.Lcleanup_idle_insn)
- jhe 1f
- mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2)
- mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2)
-1: # calculate idle cycles
- clg %r9,BASED(.Lcleanup_idle_insn)
- jl 3f
- larl %r1,smp_cpu_mtid
- llgf %r1,0(%r1)
- ltgr %r1,%r1
- jz 3f
- .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15)
- larl %r3,mt_cycles
- ag %r3,__LC_PERCPU_OFFSET
- la %r4,__SF_EMPTY+16(%r15)
-2: lg %r0,0(%r3)
- slg %r0,0(%r4)
- alg %r0,64(%r4)
- stg %r0,0(%r3)
- la %r3,8(%r3)
- la %r4,8(%r4)
- brct %r1,2b
-3: # account system time going idle
- lg %r9,__LC_STEAL_TIMER
- alg %r9,__CLOCK_IDLE_ENTER(%r2)
- slg %r9,__LC_LAST_UPDATE_CLOCK
- stg %r9,__LC_STEAL_TIMER
- mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
- lg %r9,__LC_SYSTEM_TIMER
- alg %r9,__LC_LAST_UPDATE_TIMER
- slg %r9,__TIMER_IDLE_ENTER(%r2)
- stg %r9,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
- # prepare return psw
- nihh %r8,0xfcfd # clear irq & wait state bits
- lg %r9,48(%r11) # return from psw_idle
- BR_EX %r14,%r11
-.Lcleanup_idle_insn:
- .quad .Lpsw_idle_lpsw
-
-.Lcleanup_save_fpu_regs:
- larl %r9,save_fpu_regs
- BR_EX %r14,%r11
-
-.Lcleanup_load_fpu_regs:
- larl %r9,load_fpu_regs
- BR_EX %r14,%r11
-
-/*
- * Integer constants
- */
- .align 8
-.Lcritical_start:
- .quad .L__critical_start
-.Lcritical_length:
- .quad .L__critical_end - .L__critical_start
-#if IS_ENABLED(CONFIG_KVM)
-.Lsie_critical_start:
- .quad .Lsie_gmap
-.Lsie_critical_length:
- .quad .Lsie_done - .Lsie_gmap
-.Lsie_crit_mcck_start:
- .quad .Lsie_entry
-.Lsie_crit_mcck_length:
- .quad .Lsie_skip - .Lsie_entry
#endif
.section .rodata, "a"
#define SYSCALL(esame,emu) .quad __s390x_ ## esame
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 4cd9b1ada834..44e01dd1e624 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -72,22 +72,6 @@ static inline void ftrace_generate_orig_insn(struct ftrace_insn *insn)
#endif
}
-static inline void ftrace_generate_kprobe_nop_insn(struct ftrace_insn *insn)
-{
-#ifdef CONFIG_KPROBES
- insn->opc = BREAKPOINT_INSTRUCTION;
- insn->disp = KPROBE_ON_FTRACE_NOP;
-#endif
-}
-
-static inline void ftrace_generate_kprobe_call_insn(struct ftrace_insn *insn)
-{
-#ifdef CONFIG_KPROBES
- insn->opc = BREAKPOINT_INSTRUCTION;
- insn->disp = KPROBE_ON_FTRACE_CALL;
-#endif
-}
-
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index 8f8456816d83..0d7fbdfe995a 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -24,19 +24,19 @@ void enabled_wait(void)
{
struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
unsigned long long idle_time;
- unsigned long psw_mask;
+ unsigned long psw_mask, flags;
- trace_hardirqs_on();
/* Wait for external, I/O or machine check interrupt. */
psw_mask = PSW_KERNEL_BITS | PSW_MASK_WAIT | PSW_MASK_DAT |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
clear_cpu_flag(CIF_NOHZ_DELAY);
+ local_irq_save(flags);
/* Call the assembler magic in entry.S */
psw_idle(idle, psw_mask);
+ local_irq_restore(flags);
- trace_hardirqs_off();
/* Account time spent with enabled wait psw loaded as idle time. */
write_seqcount_begin(&idle->seqcount);
@@ -118,22 +118,16 @@ u64 arch_cpu_idle_time(int cpu)
void arch_cpu_idle_enter(void)
{
- local_mcck_disable();
}
void arch_cpu_idle(void)
{
- if (!test_cpu_flag(CIF_MCCK_PENDING))
- /* Halt the cpu and keep track of cpu time accounting. */
- enabled_wait();
+ enabled_wait();
local_irq_enable();
}
void arch_cpu_idle_exit(void)
{
- local_mcck_enable();
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
}
void arch_cpu_idle_dead(void)
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 4a71061974fd..ccea9a245867 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -39,6 +39,7 @@
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
+#define IPL_NVME_STR "nvme"
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
@@ -93,6 +94,8 @@ static char *ipl_type_str(enum ipl_type type)
return IPL_FCP_DUMP_STR;
case IPL_TYPE_NSS:
return IPL_NSS_STR;
+ case IPL_TYPE_NVME:
+ return IPL_NVME_STR;
case IPL_TYPE_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
@@ -133,6 +136,7 @@ static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_nvme;
static struct ipl_parameter_block *reipl_block_ccw;
static struct ipl_parameter_block *reipl_block_nss;
static struct ipl_parameter_block *reipl_block_actual;
@@ -261,6 +265,8 @@ static __init enum ipl_type get_ipl_type(void)
return IPL_TYPE_FCP_DUMP;
else
return IPL_TYPE_FCP;
+ case IPL_PBT_NVME:
+ return IPL_TYPE_NVME;
}
return IPL_TYPE_UNKNOWN;
}
@@ -317,6 +323,8 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj,
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
+ case IPL_TYPE_NVME:
+ return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
default:
return 0;
}
@@ -345,15 +353,35 @@ static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
+
+static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ unsigned int size = ipl_block.nvme.scp_data_len;
+ void *scp_data = &ipl_block.nvme.scp_data;
+
+ return memory_read_from_buffer(buf, count, &off, scp_data, size);
+}
+
static struct bin_attribute ipl_scp_data_attr =
__BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
+static struct bin_attribute ipl_nvme_scp_data_attr =
+ __BIN_ATTR(scp_data, S_IRUGO, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
+
static struct bin_attribute *ipl_fcp_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_scp_data_attr,
NULL,
};
+static struct bin_attribute *ipl_nvme_bin_attrs[] = {
+ &ipl_parameter_attr,
+ &ipl_nvme_scp_data_attr,
+ NULL,
+};
+
/* FCP ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
@@ -365,6 +393,16 @@ DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
(unsigned long long)ipl_block.fcp.br_lba);
+/* NVMe ipl device attributes */
+DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
+ (unsigned long long)ipl_block.nvme.fid);
+DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
+ (unsigned long long)ipl_block.nvme.nsid);
+DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
+ (unsigned long long)ipl_block.nvme.bootprog);
+DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
+ (unsigned long long)ipl_block.nvme.br_lba);
+
static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
@@ -399,6 +437,24 @@ static struct attribute_group ipl_fcp_attr_group = {
.bin_attrs = ipl_fcp_bin_attrs,
};
+static struct attribute *ipl_nvme_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ &sys_ipl_nvme_fid_attr.attr,
+ &sys_ipl_nvme_nsid_attr.attr,
+ &sys_ipl_nvme_bootprog_attr.attr,
+ &sys_ipl_nvme_br_lba_attr.attr,
+ &sys_ipl_ccw_loadparm_attr.attr,
+ &sys_ipl_secure_attr.attr,
+ &sys_ipl_has_secure_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_nvme_attr_group = {
+ .attrs = ipl_nvme_attrs,
+ .bin_attrs = ipl_nvme_bin_attrs,
+};
+
+
/* CCW ipl device attributes */
static struct attribute *ipl_ccw_attrs_vm[] = {
@@ -474,6 +530,9 @@ static int __init ipl_init(void)
case IPL_TYPE_FCP_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
break;
+ case IPL_TYPE_NVME:
+ rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
+ break;
default:
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_unknown_attr_group);
@@ -727,6 +786,93 @@ static struct attribute_group reipl_fcp_attr_group = {
static struct kobj_attribute sys_reipl_fcp_clear_attr =
__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
+/* NVME reipl device attributes */
+
+static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
+{
+ size_t size = reipl_block_nvme->nvme.scp_data_len;
+ void *scp_data = reipl_block_nvme->nvme.scp_data;
+
+ return memory_read_from_buffer(buf, count, &off, scp_data, size);
+}
+
+static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr,
+ char *buf, loff_t off, size_t count)
+{
+ size_t scpdata_len = count;
+ size_t padding;
+
+ if (off)
+ return -EINVAL;
+
+ memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
+ if (scpdata_len % 8) {
+ padding = 8 - (scpdata_len % 8);
+ memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
+ 0, padding);
+ scpdata_len += padding;
+ }
+
+ reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
+ reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
+ reipl_block_nvme->nvme.scp_data_len = scpdata_len;
+
+ return count;
+}
+
+static struct bin_attribute sys_reipl_nvme_scp_data_attr =
+ __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_nvme_scpdata_read,
+ reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
+
+static struct bin_attribute *reipl_nvme_bin_attrs[] = {
+ &sys_reipl_nvme_scp_data_attr,
+ NULL,
+};
+
+DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
+ reipl_block_nvme->nvme.fid);
+DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
+ reipl_block_nvme->nvme.nsid);
+DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
+ reipl_block_nvme->nvme.bootprog);
+DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
+ reipl_block_nvme->nvme.br_lba);
+
+/* nvme wrapper */
+static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return reipl_generic_loadparm_show(reipl_block_nvme, page);
+}
+
+static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
+}
+
+static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
+ __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nvme_loadparm_show,
+ reipl_nvme_loadparm_store);
+
+static struct attribute *reipl_nvme_attrs[] = {
+ &sys_reipl_nvme_fid_attr.attr,
+ &sys_reipl_nvme_nsid_attr.attr,
+ &sys_reipl_nvme_bootprog_attr.attr,
+ &sys_reipl_nvme_br_lba_attr.attr,
+ &sys_reipl_nvme_loadparm_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_nvme_attr_group = {
+ .attrs = reipl_nvme_attrs,
+ .bin_attrs = reipl_nvme_bin_attrs
+};
+
/* CCW reipl device attributes */
DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
@@ -891,6 +1037,9 @@ static int reipl_set_type(enum ipl_type type)
case IPL_TYPE_FCP:
reipl_block_actual = reipl_block_fcp;
break;
+ case IPL_TYPE_NVME:
+ reipl_block_actual = reipl_block_nvme;
+ break;
case IPL_TYPE_NSS:
reipl_block_actual = reipl_block_nss;
break;
@@ -917,6 +1066,8 @@ static ssize_t reipl_type_store(struct kobject *kobj,
rc = reipl_set_type(IPL_TYPE_CCW);
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_FCP);
+ else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
+ rc = reipl_set_type(IPL_TYPE_NVME);
else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_NSS);
return (rc != 0) ? rc : len;
@@ -927,6 +1078,7 @@ static struct kobj_attribute reipl_type_attr =
static struct kset *reipl_kset;
static struct kset *reipl_fcp_kset;
+static struct kset *reipl_nvme_kset;
static void __reipl_run(void *unused)
{
@@ -945,6 +1097,10 @@ static void __reipl_run(void *unused)
else
diag308(DIAG308_LOAD_NORMAL, NULL);
break;
+ case IPL_TYPE_NVME:
+ diag308(DIAG308_SET, reipl_block_nvme);
+ diag308(DIAG308_LOAD_CLEAR, NULL);
+ break;
case IPL_TYPE_NSS:
diag308(DIAG308_SET, reipl_block_nss);
diag308(DIAG308_LOAD_CLEAR, NULL);
@@ -1093,6 +1249,49 @@ static int __init reipl_fcp_init(void)
return rc;
}
+static int __init reipl_nvme_init(void)
+{
+ int rc;
+
+ reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!reipl_block_nvme)
+ return -ENOMEM;
+
+ /* sysfs: create kset for mixing attr group and bin attrs */
+ reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
+ &reipl_kset->kobj);
+ if (!reipl_nvme_kset) {
+ free_page((unsigned long) reipl_block_nvme);
+ return -ENOMEM;
+ }
+
+ rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
+ if (rc) {
+ kset_unregister(reipl_nvme_kset);
+ free_page((unsigned long) reipl_block_nvme);
+ return rc;
+ }
+
+ if (ipl_info.type == IPL_TYPE_NVME) {
+ memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
+ /*
+ * Fix loadparm: There are systems where the (SCSI) LOADPARM
+ * is invalid in the IPL parameter block, so take it
+ * always from sclp_ipl_info.
+ */
+ memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
+ LOADPARM_LEN);
+ } else {
+ reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
+ reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
+ reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
+ reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
+ reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
+ }
+ reipl_capabilities |= IPL_TYPE_NVME;
+ return 0;
+}
+
static int __init reipl_type_init(void)
{
enum ipl_type reipl_type = ipl_info.type;
@@ -1108,6 +1307,9 @@ static int __init reipl_type_init(void)
if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
memcpy(reipl_block_fcp, reipl_block, size);
reipl_type = IPL_TYPE_FCP;
+ } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
+ memcpy(reipl_block_nvme, reipl_block, size);
+ reipl_type = IPL_TYPE_NVME;
} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
memcpy(reipl_block_ccw, reipl_block, size);
reipl_type = IPL_TYPE_CCW;
@@ -1132,6 +1334,9 @@ static int __init reipl_init(void)
if (rc)
return rc;
rc = reipl_fcp_init();
+ if (rc)
+ return rc;
+ rc = reipl_nvme_init();
if (rc)
return rc;
rc = reipl_nss_init();
@@ -1750,6 +1955,10 @@ void __init setup_ipl(void)
ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
ipl_info.data.fcp.lun = ipl_block.fcp.lun;
break;
+ case IPL_TYPE_NVME:
+ ipl_info.data.nvme.fid = ipl_block.nvme.fid;
+ ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
+ break;
case IPL_TYPE_NSS:
case IPL_TYPE_UNKNOWN:
/* We have no info to copy */
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 0a487fae763e..86c8d5370e7f 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -148,7 +148,6 @@ void s390_handle_mcck(void)
local_mcck_disable();
mcck = *this_cpu_ptr(&cpu_mcck);
memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck));
- clear_cpu_flag(CIF_MCCK_PENDING);
local_mcck_enable();
local_irq_restore(flags);
@@ -333,7 +332,7 @@ NOKPROBE_SYMBOL(s390_backup_mcck_info);
/*
* machine check handler.
*/
-void notrace s390_do_machine_check(struct pt_regs *regs)
+int notrace s390_do_machine_check(struct pt_regs *regs)
{
static int ipd_count;
static DEFINE_SPINLOCK(ipd_lock);
@@ -342,6 +341,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
unsigned long long tmp;
union mci mci;
unsigned long mcck_dam_code;
+ int mcck_pending = 0;
nmi_enter();
inc_irq_stat(NMI_NMI);
@@ -400,7 +400,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
*/
mcck->kill_task = 1;
mcck->mcck_code = mci.val;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -420,8 +420,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
mcck->stp_queue |= stp_sync_check();
if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND))
mcck->stp_queue |= stp_island_check();
- if (mcck->stp_queue)
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -442,12 +441,12 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
if (mci.cp) {
/* Channel report word pending */
mcck->channel_report = 1;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
if (mci.w) {
/* Warning pending */
mcck->warning = 1;
- set_cpu_flag(CIF_MCCK_PENDING);
+ mcck_pending = 1;
}
/*
@@ -462,7 +461,17 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
*((long *)(regs->gprs[15] + __SF_SIE_REASON)) = -EINTR;
}
clear_cpu_flag(CIF_MCCK_GUEST);
+
+ if (user_mode(regs) && mcck_pending) {
+ nmi_exit();
+ return 1;
+ }
+
+ if (mcck_pending)
+ schedule_mcck_handler();
+
nmi_exit();
+ return 0;
}
NOKPROBE_SYMBOL(s390_do_machine_check);
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 58faa12542a1..994a8b86edae 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -1416,7 +1416,7 @@ static const struct user_regset s390_regsets[] = {
};
static const struct user_regset_view user_s390_view = {
- .name = UTS_MACHINE,
+ .name = "s390x",
.e_machine = EM_S390,
.regsets = s390_regsets,
.n = ARRAY_SIZE(s390_regsets)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 36445dd40fdb..f432b57438f9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -384,8 +384,7 @@ static void __init setup_lowcore_dat_off(void)
lc->restart_psw.addr = (unsigned long) restart_int_handler;
lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->external_new_psw.addr = (unsigned long) ext_int_handler;
- lc->svc_new_psw.mask = PSW_KERNEL_BITS |
- PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
+ lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->svc_new_psw.addr = (unsigned long) system_call;
lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
@@ -597,9 +596,10 @@ static void __init setup_memory_end(void)
#ifdef CONFIG_CRASH_DUMP
/*
- * When kdump is enabled, we have to ensure that no memory from
- * the area [0 - crashkernel memory size] and
- * [crashk_res.start - crashk_res.end] is set offline.
+ * When kdump is enabled, we have to ensure that no memory from the area
+ * [0 - crashkernel memory size] is set offline - it will be exchanged with
+ * the crashkernel memory region when kdump is triggered. The crashkernel
+ * memory region can never get offlined (pages are unmovable).
*/
static int kdump_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
@@ -610,11 +610,7 @@ static int kdump_mem_notifier(struct notifier_block *nb,
return NOTIFY_OK;
if (arg->start_pfn < PFN_DOWN(resource_size(&crashk_res)))
return NOTIFY_BAD;
- if (arg->start_pfn > PFN_DOWN(crashk_res.end))
- return NOTIFY_OK;
- if (arg->start_pfn + arg->nr_pages - 1 < PFN_DOWN(crashk_res.start))
- return NOTIFY_OK;
- return NOTIFY_BAD;
+ return NOTIFY_OK;
}
static struct notifier_block kdump_mem_nb = {
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 7eaabbab2213..fc1041257c60 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -61,6 +61,7 @@ enum {
ec_schedule = 0,
ec_call_function_single,
ec_stop_cpu,
+ ec_mcck_pending,
};
enum {
@@ -403,6 +404,11 @@ int smp_find_processor_id(u16 address)
return -1;
}
+void schedule_mcck_handler(void)
+{
+ pcpu_ec_call(pcpu_devices + smp_processor_id(), ec_mcck_pending);
+}
+
bool arch_vcpu_is_preempted(int cpu)
{
if (test_cpu_flag_of(CIF_ENABLED_WAIT, cpu))
@@ -497,6 +503,8 @@ static void smp_handle_ext_call(void)
scheduler_ipi();
if (test_bit(ec_call_function_single, &bits))
generic_smp_call_function_single_interrupt();
+ if (test_bit(ec_mcck_pending, &bits))
+ s390_handle_mcck();
}
static void do_ext_call_interrupt(struct ext_code ext_code,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 19a81024fe16..5722daf0b603 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -3995,9 +3995,6 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
if (need_resched())
schedule();
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
-
if (!kvm_is_ucontrol(vcpu->kvm)) {
rc = kvm_s390_deliver_pending_interrupts(vcpu);
if (rc)
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 4f6c22d72072..4fde24a1856e 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -1002,8 +1002,6 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
if (need_resched())
schedule();
- if (test_cpu_flag(CIF_MCCK_PENDING))
- s390_handle_mcck();
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index d4aa10795605..daca7bad66de 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -33,7 +33,7 @@ EXPORT_SYMBOL(__delay);
static void __udelay_disabled(unsigned long long usecs)
{
- unsigned long cr0, cr0_new, psw_mask;
+ unsigned long cr0, cr0_new, psw_mask, flags;
struct s390_idle_data idle;
u64 end;
@@ -45,7 +45,9 @@ static void __udelay_disabled(unsigned long long usecs)
psw_mask = __extract_psw() | PSW_MASK_EXT | PSW_MASK_WAIT;
set_clock_comparator(end);
set_cpu_flag(CIF_IGNORE_IRQ);
+ local_irq_save(flags);
psw_idle(&idle, psw_mask);
+ local_irq_restore(flags);
clear_cpu_flag(CIF_IGNORE_IRQ);
set_clock_comparator(S390_lowcore.clock_comparator);
__ctl_load(cr0, 0, 0);
diff --git a/arch/s390/pci/Makefile b/arch/s390/pci/Makefile
index 748626a33028..b4e3c84772a1 100644
--- a/arch/s390/pci/Makefile
+++ b/arch/s390/pci/Makefile
@@ -4,4 +4,5 @@
#
obj-$(CONFIG_PCI) += pci.o pci_irq.o pci_dma.o pci_clp.o pci_sysfs.o \
- pci_event.o pci_debug.o pci_insn.o pci_mmio.o
+ pci_event.o pci_debug.o pci_insn.o pci_mmio.o \
+ pci_bus.o
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 94ca121933de..3902c9f6f2d6 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -36,18 +36,21 @@
#include <asm/pci_clp.h>
#include <asm/pci_dma.h>
+#include "pci_bus.h"
+
/* list of all detected zpci devices */
static LIST_HEAD(zpci_list);
static DEFINE_SPINLOCK(zpci_list_lock);
static DECLARE_BITMAP(zpci_domain, ZPCI_DOMAIN_BITMAP_SIZE);
static DEFINE_SPINLOCK(zpci_domain_lock);
-static unsigned int zpci_num_domains_allocated;
#define ZPCI_IOMAP_ENTRIES \
min(((unsigned long) ZPCI_NR_DEVICES * PCI_STD_NUM_BARS / 2), \
ZPCI_IOMAP_MAX_ENTRIES)
+unsigned int s390_pci_no_rid;
+
static DEFINE_SPINLOCK(zpci_iomap_lock);
static unsigned long *zpci_iomap_bitmap;
struct zpci_iomap_entry *zpci_iomap_start;
@@ -88,17 +91,12 @@ void zpci_remove_reserved_devices(void)
spin_unlock(&zpci_list_lock);
list_for_each_entry_safe(zdev, tmp, &remove, entry)
- zpci_remove_device(zdev);
-}
-
-static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
-{
- return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
+ zpci_zdev_put(zdev);
}
int pci_domain_nr(struct pci_bus *bus)
{
- return ((struct zpci_dev *) bus->sysdata)->domain;
+ return ((struct zpci_bus *) bus->sysdata)->domain_nr;
}
EXPORT_SYMBOL_GPL(pci_domain_nr);
@@ -228,28 +226,29 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
zpci_memcpy_toio(to, from, count);
}
-void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
+void __iomem *ioremap(phys_addr_t addr, size_t size)
{
+ unsigned long offset, vaddr;
struct vm_struct *area;
- unsigned long offset;
+ phys_addr_t last_addr;
- if (!size)
+ last_addr = addr + size - 1;
+ if (!size || last_addr < addr)
return NULL;
if (!static_branch_unlikely(&have_mio))
- return (void __iomem *) ioaddr;
+ return (void __iomem *) addr;
- offset = ioaddr & ~PAGE_MASK;
- ioaddr &= PAGE_MASK;
+ offset = addr & ~PAGE_MASK;
+ addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
- if (ioremap_page_range((unsigned long) area->addr,
- (unsigned long) area->addr + size,
- ioaddr, PAGE_KERNEL)) {
- vunmap(area->addr);
+ vaddr = (unsigned long) area->addr;
+ if (ioremap_page_range(vaddr, vaddr + size, addr, PAGE_KERNEL)) {
+ free_vm_area(area);
return NULL;
}
return (void __iomem *) ((unsigned long) area->addr + offset);
@@ -373,29 +372,17 @@ EXPORT_SYMBOL(pci_iounmap);
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_load(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_load(zdev, where, val, size) : -ENODEV;
}
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
- int ret;
+ struct zpci_dev *zdev = get_zdev_by_bus(bus, devfn);
- if (!zdev || devfn != ZPCI_DEVFN)
- ret = -ENODEV;
- else
- ret = zpci_cfg_store(zdev, where, val, size);
-
- return ret;
+ return (zdev) ? zpci_cfg_store(zdev, where, val, size) : -ENODEV;
}
static struct pci_ops pci_root_ops = {
@@ -506,15 +493,15 @@ static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
return r;
}
-static int zpci_setup_bus_resources(struct zpci_dev *zdev,
- struct list_head *resources)
+int zpci_setup_bus_resources(struct zpci_dev *zdev,
+ struct list_head *resources)
{
unsigned long addr, size, flags;
struct resource *res;
int i, entry;
snprintf(zdev->res_name, sizeof(zdev->res_name),
- "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
+ "PCI Bus %04x:%02x", zdev->uid, ZPCI_BUS_NR);
for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (!zdev->bars[i].size)
@@ -608,98 +595,53 @@ void pcibios_disable_device(struct pci_dev *pdev)
zpci_debug_exit_device(zdev);
}
-static int zpci_alloc_domain(struct zpci_dev *zdev)
+static int __zpci_register_domain(int domain)
{
spin_lock(&zpci_domain_lock);
- if (zpci_num_domains_allocated > (ZPCI_NR_DEVICES - 1)) {
+ if (test_bit(domain, zpci_domain)) {
spin_unlock(&zpci_domain_lock);
- pr_err("Adding PCI function %08x failed because the configured limit of %d is reached\n",
- zdev->fid, ZPCI_NR_DEVICES);
- return -ENOSPC;
+ pr_err("Domain %04x is already assigned\n", domain);
+ return -EEXIST;
}
+ set_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
+ return domain;
+}
- if (zpci_unique_uid) {
- zdev->domain = (u16) zdev->uid;
- if (zdev->domain == 0) {
- pr_warn("UID checking is active but no UID is set for PCI function %08x, so automatic domain allocation is used instead\n",
- zdev->fid);
- update_uid_checking(false);
- goto auto_allocate;
- }
+static int __zpci_alloc_domain(void)
+{
+ int domain;
- if (test_bit(zdev->domain, zpci_domain)) {
- spin_unlock(&zpci_domain_lock);
- pr_err("Adding PCI function %08x failed because domain %04x is already assigned\n",
- zdev->fid, zdev->domain);
- return -EEXIST;
- }
- set_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated++;
- spin_unlock(&zpci_domain_lock);
- return 0;
- }
-auto_allocate:
+ spin_lock(&zpci_domain_lock);
/*
* We can always auto allocate domains below ZPCI_NR_DEVICES.
* There is either a free domain or we have reached the maximum in
* which case we would have bailed earlier.
*/
- zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
- set_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated++;
+ domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
+ set_bit(domain, zpci_domain);
spin_unlock(&zpci_domain_lock);
- return 0;
+ return domain;
}
-static void zpci_free_domain(struct zpci_dev *zdev)
+int zpci_alloc_domain(int domain)
{
- spin_lock(&zpci_domain_lock);
- clear_bit(zdev->domain, zpci_domain);
- zpci_num_domains_allocated--;
- spin_unlock(&zpci_domain_lock);
+ if (zpci_unique_uid) {
+ if (domain)
+ return __zpci_register_domain(domain);
+ pr_warn("UID checking was active but no UID is provided: switching to automatic domain allocation\n");
+ update_uid_checking(false);
+ }
+ return __zpci_alloc_domain();
}
-void pcibios_remove_bus(struct pci_bus *bus)
+void zpci_free_domain(int domain)
{
- struct zpci_dev *zdev = get_zdev_by_bus(bus);
-
- zpci_exit_slot(zdev);
- zpci_cleanup_bus_resources(zdev);
- zpci_destroy_iommu(zdev);
- zpci_free_domain(zdev);
-
- spin_lock(&zpci_list_lock);
- list_del(&zdev->entry);
- spin_unlock(&zpci_list_lock);
-
- zpci_dbg(3, "rem fid:%x\n", zdev->fid);
- kfree(zdev);
+ spin_lock(&zpci_domain_lock);
+ clear_bit(domain, zpci_domain);
+ spin_unlock(&zpci_domain_lock);
}
-static int zpci_scan_bus(struct zpci_dev *zdev)
-{
- LIST_HEAD(resources);
- int ret;
-
- ret = zpci_setup_bus_resources(zdev, &resources);
- if (ret)
- goto error;
-
- zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
- zdev, &resources);
- if (!zdev->bus) {
- ret = -EIO;
- goto error;
- }
- zdev->bus->max_bus_speed = zdev->max_bus_speed;
- pci_bus_add_devices(zdev->bus);
- return 0;
-
-error:
- zpci_cleanup_bus_resources(zdev);
- pci_free_resource_list(&resources);
- return ret;
-}
int zpci_enable_device(struct zpci_dev *zdev)
{
@@ -734,13 +676,15 @@ int zpci_create_device(struct zpci_dev *zdev)
{
int rc;
- rc = zpci_alloc_domain(zdev);
- if (rc)
- goto out;
+ kref_init(&zdev->kref);
+
+ spin_lock(&zpci_list_lock);
+ list_add_tail(&zdev->entry, &zpci_list);
+ spin_unlock(&zpci_list_lock);
rc = zpci_init_iommu(zdev);
if (rc)
- goto out_free;
+ goto out;
mutex_init(&zdev->lock);
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
@@ -748,36 +692,59 @@ int zpci_create_device(struct zpci_dev *zdev)
if (rc)
goto out_destroy_iommu;
}
- rc = zpci_scan_bus(zdev);
+
+ rc = zpci_bus_device_register(zdev, &pci_root_ops);
if (rc)
goto out_disable;
- spin_lock(&zpci_list_lock);
- list_add_tail(&zdev->entry, &zpci_list);
- spin_unlock(&zpci_list_lock);
-
- zpci_init_slot(zdev);
-
return 0;
out_disable:
if (zdev->state == ZPCI_FN_STATE_ONLINE)
zpci_disable_device(zdev);
+
out_destroy_iommu:
zpci_destroy_iommu(zdev);
-out_free:
- zpci_free_domain(zdev);
out:
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
return rc;
}
-void zpci_remove_device(struct zpci_dev *zdev)
+void zpci_release_device(struct kref *kref)
{
- if (!zdev->bus)
- return;
+ struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
+
+ if (zdev->zbus->bus) {
+ struct pci_dev *pdev;
+
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
+ if (pdev)
+ pci_stop_and_remove_bus_device_locked(pdev);
+ }
+
+ switch (zdev->state) {
+ case ZPCI_FN_STATE_ONLINE:
+ case ZPCI_FN_STATE_CONFIGURED:
+ zpci_disable_device(zdev);
+ fallthrough;
+ case ZPCI_FN_STATE_STANDBY:
+ if (zdev->has_hp_slot)
+ zpci_exit_slot(zdev);
+ zpci_cleanup_bus_resources(zdev);
+ zpci_bus_device_unregister(zdev);
+ zpci_destroy_iommu(zdev);
+ fallthrough;
+ default:
+ break;
+ }
- pci_stop_root_bus(zdev->bus);
- pci_remove_root_bus(zdev->bus);
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zpci_dbg(3, "rem fid:%x\n", zdev->fid);
+ kfree(zdev);
}
int zpci_report_error(struct pci_dev *pdev,
@@ -844,6 +811,10 @@ char * __init pcibios_setup(char *str)
s390_pci_force_floating = 1;
return NULL;
}
+ if (!strcmp(str, "norid")) {
+ s390_pci_no_rid = 1;
+ return NULL;
+ }
return str;
}
diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
new file mode 100644
index 000000000000..642a99384688
--- /dev/null
+++ b/arch/s390/pci/pci_bus.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s):
+ * Pierre Morel <pmorel@...ux.ibm.com>
+ *
+ */
+
+#define KMSG_COMPONENT "zpci"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/jump_label.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+
+#include <asm/pci_clp.h>
+#include <asm/pci_dma.h>
+
+#include "pci_bus.h"
+
+static LIST_HEAD(zbus_list);
+static DEFINE_SPINLOCK(zbus_list_lock);
+static int zpci_nb_devices;
+
+/* zpci_bus_scan
+ * @zbus: the zbus holding the zdevices
+ * @ops: the pci operations
+ *
+ * The domain number must be set before pci_scan_root_bus is called.
+ * This function can be called once the domain is known, hence
+ * when the function_0 is dicovered.
+ */
+static int zpci_bus_scan(struct zpci_bus *zbus, int domain, struct pci_ops *ops)
+{
+ struct pci_bus *bus;
+ int rc;
+
+ rc = zpci_alloc_domain(domain);
+ if (rc < 0)
+ return rc;
+ zbus->domain_nr = rc;
+
+ bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, ops, zbus, &zbus->resources);
+ if (!bus) {
+ zpci_free_domain(zbus->domain_nr);
+ return -EFAULT;
+ }
+
+ zbus->bus = bus;
+ pci_bus_add_devices(bus);
+ return 0;
+}
+
+static void zpci_bus_release(struct kref *kref)
+{
+ struct zpci_bus *zbus = container_of(kref, struct zpci_bus, kref);
+
+ if (zbus->bus) {
+ pci_lock_rescan_remove();
+ pci_stop_root_bus(zbus->bus);
+
+ zpci_free_domain(zbus->domain_nr);
+ pci_free_resource_list(&zbus->resources);
+
+ pci_remove_root_bus(zbus->bus);
+ pci_unlock_rescan_remove();
+ }
+
+ spin_lock(&zbus_list_lock);
+ list_del(&zbus->bus_next);
+ spin_unlock(&zbus_list_lock);
+ kfree(zbus);
+}
+
+static void zpci_bus_put(struct zpci_bus *zbus)
+{
+ kref_put(&zbus->kref, zpci_bus_release);
+}
+
+static struct zpci_bus *zpci_bus_get(int pchid)
+{
+ struct zpci_bus *zbus;
+
+ spin_lock(&zbus_list_lock);
+ list_for_each_entry(zbus, &zbus_list, bus_next) {
+ if (pchid == zbus->pchid) {
+ kref_get(&zbus->kref);
+ goto out_unlock;
+ }
+ }
+ zbus = NULL;
+out_unlock:
+ spin_unlock(&zbus_list_lock);
+ return zbus;
+}
+
+static struct zpci_bus *zpci_bus_alloc(int pchid)
+{
+ struct zpci_bus *zbus;
+
+ zbus = kzalloc(sizeof(*zbus), GFP_KERNEL);
+ if (!zbus)
+ return NULL;
+
+ zbus->pchid = pchid;
+ INIT_LIST_HEAD(&zbus->bus_next);
+ spin_lock(&zbus_list_lock);
+ list_add_tail(&zbus->bus_next, &zbus_list);
+ spin_unlock(&zbus_list_lock);
+
+ kref_init(&zbus->kref);
+ INIT_LIST_HEAD(&zbus->resources);
+
+ zbus->bus_resource.start = 0;
+ zbus->bus_resource.end = ZPCI_BUS_NR;
+ zbus->bus_resource.flags = IORESOURCE_BUS;
+ pci_add_resource(&zbus->resources, &zbus->bus_resource);
+
+ return zbus;
+}
+
+#ifdef CONFIG_PCI_IOV
+static int zpci_bus_link_virtfn(struct pci_dev *pdev,
+ struct pci_dev *virtfn, int vfid)
+{
+ int rc;
+
+ virtfn->physfn = pci_dev_get(pdev);
+ rc = pci_iov_sysfs_link(pdev, virtfn, vfid);
+ if (rc) {
+ pci_dev_put(pdev);
+ virtfn->physfn = NULL;
+ return rc;
+ }
+ return 0;
+}
+
+static int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
+ struct pci_dev *virtfn, int vfn)
+{
+ int i, cand_devfn;
+ struct zpci_dev *zdev;
+ struct pci_dev *pdev;
+ int vfid = vfn - 1; /* Linux' vfid's start at 0 vfn at 1*/
+ int rc = 0;
+
+ virtfn->is_virtfn = 1;
+ virtfn->multifunction = 0;
+ WARN_ON(vfid < 0);
+ /* If the parent PF for the given VF is also configured in the
+ * instance, it must be on the same zbus.
+ * We can then identify the parent PF by checking what
+ * devfn the VF would have if it belonged to that PF using the PF's
+ * stride and offset. Only if this candidate devfn matches the
+ * actual devfn will we link both functions.
+ */
+ for (i = 0; i < ZPCI_FUNCTIONS_PER_BUS; i++) {
+ zdev = zbus->function[i];
+ if (zdev && zdev->is_physfn) {
+ pdev = pci_get_slot(zbus->bus, zdev->devfn);
+ cand_devfn = pci_iov_virtfn_devfn(pdev, vfid);
+ if (cand_devfn == virtfn->devfn) {
+ rc = zpci_bus_link_virtfn(pdev, virtfn, vfid);
+ break;
+ }
+ }
+ }
+ return rc;
+}
+#else
+static inline int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
+ struct pci_dev *virtfn, int vfn)
+{
+ virtfn->is_virtfn = 1;
+ virtfn->multifunction = 0;
+ return 0;
+}
+#endif
+
+static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
+{
+ struct pci_bus *bus;
+ struct resource_entry *window, *n;
+ struct resource *res;
+ struct pci_dev *pdev;
+ int rc;
+
+ bus = zbus->bus;
+ if (!bus)
+ return -EINVAL;
+
+ pdev = pci_get_slot(bus, zdev->devfn);
+ if (pdev) {
+ /* Device is already known. */
+ pci_dev_put(pdev);
+ return 0;
+ }
+
+ rc = zpci_init_slot(zdev);
+ if (rc)
+ return rc;
+ zdev->has_hp_slot = 1;
+
+ resource_list_for_each_entry_safe(window, n, &zbus->resources) {
+ res = window->res;
+ pci_bus_add_resource(bus, res, 0);
+ }
+
+ pdev = pci_scan_single_device(bus, zdev->devfn);
+ if (pdev) {
+ if (!zdev->is_physfn) {
+ rc = zpci_bus_setup_virtfn(zbus, pdev, zdev->vfn);
+ if (rc)
+ goto failed_with_pdev;
+ }
+ pci_bus_add_device(pdev);
+ }
+ return 0;
+
+failed_with_pdev:
+ pci_stop_and_remove_bus_device(pdev);
+ pci_dev_put(pdev);
+ return rc;
+}
+
+static void zpci_bus_add_devices(struct zpci_bus *zbus)
+{
+ int i;
+
+ for (i = 1; i < ZPCI_FUNCTIONS_PER_BUS; i++)
+ if (zbus->function[i])
+ zpci_bus_add_device(zbus, zbus->function[i]);
+
+ pci_lock_rescan_remove();
+ pci_bus_add_devices(zbus->bus);
+ pci_unlock_rescan_remove();
+}
+
+int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops)
+{
+ struct zpci_bus *zbus = NULL;
+ int rc = -EBADF;
+
+ if (zpci_nb_devices == ZPCI_NR_DEVICES) {
+ pr_warn("Adding PCI function %08x failed because the configured limit of %d is reached\n",
+ zdev->fid, ZPCI_NR_DEVICES);
+ return -ENOSPC;
+ }
+ zpci_nb_devices++;
+
+ if (zdev->devfn >= ZPCI_FUNCTIONS_PER_BUS)
+ return -EINVAL;
+
+ if (!s390_pci_no_rid && zdev->rid_available)
+ zbus = zpci_bus_get(zdev->pchid);
+
+ if (!zbus) {
+ zbus = zpci_bus_alloc(zdev->pchid);
+ if (!zbus)
+ return -ENOMEM;
+ }
+
+ zdev->zbus = zbus;
+ if (zbus->function[zdev->devfn]) {
+ pr_err("devfn %04x is already assigned\n", zdev->devfn);
+ goto error; /* rc already set */
+ }
+ zbus->function[zdev->devfn] = zdev;
+
+ zpci_setup_bus_resources(zdev, &zbus->resources);
+
+ if (zbus->bus) {
+ if (!zbus->multifunction) {
+ WARN_ONCE(1, "zbus is not multifunction\n");
+ goto error_bus;
+ }
+ if (!zdev->rid_available) {
+ WARN_ONCE(1, "rid_available not set for multifunction\n");
+ goto error_bus;
+ }
+ rc = zpci_bus_add_device(zbus, zdev);
+ if (rc)
+ goto error_bus;
+ } else if (zdev->devfn == 0) {
+ if (zbus->multifunction && !zdev->rid_available) {
+ WARN_ONCE(1, "rid_available not set on function 0 for multifunction\n");
+ goto error_bus;
+ }
+ rc = zpci_bus_scan(zbus, (u16)zdev->uid, ops);
+ if (rc)
+ goto error_bus;
+ zpci_bus_add_devices(zbus);
+ rc = zpci_init_slot(zdev);
+ if (rc)
+ goto error_bus;
+ zdev->has_hp_slot = 1;
+ zbus->multifunction = zdev->rid_available;
+ zbus->max_bus_speed = zdev->max_bus_speed;
+ } else {
+ zbus->multifunction = 1;
+ }
+
+ return 0;
+
+error_bus:
+ zpci_nb_devices--;
+ zbus->function[zdev->devfn] = NULL;
+error:
+ pr_err("Adding PCI function %08x failed\n", zdev->fid);
+ zpci_bus_put(zbus);
+ return rc;
+}
+
+void zpci_bus_device_unregister(struct zpci_dev *zdev)
+{
+ struct zpci_bus *zbus = zdev->zbus;
+
+ zpci_nb_devices--;
+ zbus->function[zdev->devfn] = NULL;
+ zpci_bus_put(zbus);
+}
diff --git a/arch/s390/pci/pci_bus.h b/arch/s390/pci/pci_bus.h
new file mode 100644
index 000000000000..89be3c354b7b
--- /dev/null
+++ b/arch/s390/pci/pci_bus.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s):
+ * Pierre Morel <pmorel@...ux.ibm.com>
+ *
+ */
+
+int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops);
+void zpci_bus_device_unregister(struct zpci_dev *zdev);
+int zpci_bus_init(void);
+
+void zpci_release_device(struct kref *kref);
+static inline void zpci_zdev_put(struct zpci_dev *zdev)
+{
+ kref_put(&zdev->kref, zpci_release_device);
+}
+
+int zpci_alloc_domain(int domain);
+void zpci_free_domain(int domain);
+int zpci_setup_bus_resources(struct zpci_dev *zdev,
+ struct list_head *resources);
+
+static inline struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus,
+ unsigned int devfn)
+{
+ struct zpci_bus *zbus = bus->sysdata;
+
+ return (devfn >= ZPCI_FUNCTIONS_PER_BUS) ? NULL : zbus->function[devfn];
+}
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index ea794ae755ae..7e735f41a0a6 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -155,8 +155,13 @@ static int clp_store_query_pci_fn(struct zpci_dev *zdev,
zdev->pfgid = response->pfgid;
zdev->pft = response->pft;
zdev->vfn = response->vfn;
+ zdev->port = response->port;
zdev->uid = response->uid;
zdev->fmb_length = sizeof(u32) * response->fmb_len;
+ zdev->rid_available = response->rid_avail;
+ zdev->is_physfn = response->is_physfn;
+ if (!s390_pci_no_rid && zdev->rid_available)
+ zdev->devfn = response->rid & ZPCI_RID_MASK_DEVFN;
memcpy(zdev->pfip, response->pfip, sizeof(zdev->pfip));
if (response->util_str_avail) {
@@ -309,14 +314,13 @@ int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
int clp_disable_fh(struct zpci_dev *zdev)
{
- u32 fh = zdev->fh;
int rc;
if (!zdev_enabled(zdev))
return 0;
rc = clp_set_pci_fn(zdev, 0, CLP_SET_DISABLE_PCI_FN);
- zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+ zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
return rc;
}
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 8d6ee4af4230..08e1d619398e 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -14,6 +14,8 @@
#include <asm/pci_debug.h>
#include <asm/sclp.h>
+#include "pci_bus.h"
+
/* Content Code Description for PCI Function Error */
struct zpci_ccdf_err {
u32 reserved1;
@@ -53,7 +55,7 @@ static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
zpci_err_hex(ccdf, sizeof(*ccdf));
if (zdev)
- pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
@@ -78,36 +80,28 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
enum zpci_state state;
int ret;
- if (zdev)
- pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
+ if (zdev && zdev->zbus && zdev->zbus->bus)
+ pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
- pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
- pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
zpci_err("avail CCDF:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
switch (ccdf->pec) {
case 0x0301: /* Reserved|Standby -> Configured */
if (!zdev) {
- ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
- if (ret)
- break;
- zdev = get_zdev_by_fid(ccdf->fid);
- }
- if (!zdev || zdev->state != ZPCI_FN_STATE_STANDBY)
+ ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 1);
break;
- zdev->state = ZPCI_FN_STATE_CONFIGURED;
+ }
zdev->fh = ccdf->fh;
- ret = zpci_enable_device(zdev);
- if (ret)
- break;
- pci_lock_rescan_remove();
- pci_rescan_bus(zdev->bus);
- pci_unlock_rescan_remove();
+ zdev->state = ZPCI_FN_STATE_CONFIGURED;
+ zpci_create_device(zdev);
break;
case 0x0302: /* Reserved -> Standby */
- if (!zdev)
+ if (!zdev) {
clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
+ break;
+ }
+ zdev->fh = ccdf->fh;
break;
case 0x0303: /* Deconfiguration requested */
if (!zdev)
@@ -135,12 +129,10 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
pci_stop_and_remove_bus_device_locked(pdev);
}
- zdev->fh = ccdf->fh;
- zpci_disable_device(zdev);
zdev->state = ZPCI_FN_STATE_STANDBY;
if (!clp_get_state(ccdf->fid, &state) &&
state == ZPCI_FN_STATE_RESERVED) {
- zpci_remove_device(zdev);
+ zpci_zdev_put(zdev);
}
break;
case 0x0306: /* 0x308 or 0x302 for multiple devices */
@@ -149,12 +141,11 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
case 0x0308: /* Standby -> Reserved */
if (!zdev)
break;
- zpci_remove_device(zdev);
+ zpci_zdev_put(zdev);
break;
default:
break;
}
- pci_dev_put(pdev);
}
void zpci_event_availability(void *data)
diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c
index 215f17437a4f..5c028bee91b9 100644
--- a/arch/s390/pci/pci_sysfs.c
+++ b/arch/s390/pci/pci_sysfs.c
@@ -33,6 +33,7 @@ zpci_attr(pchid, "0x%04x\n", pchid);
zpci_attr(pfgid, "0x%02x\n", pfgid);
zpci_attr(vfn, "0x%04x\n", vfn);
zpci_attr(pft, "0x%02x\n", pft);
+zpci_attr(port, "%d\n", port);
zpci_attr(uid, "0x%x\n", uid);
zpci_attr(segment0, "0x%02x\n", pfip[0]);
zpci_attr(segment1, "0x%02x\n", pfip[1]);
@@ -88,7 +89,7 @@ static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
ret = zpci_enable_device(zdev);
if (ret)
goto out;
- pci_rescan_bus(zdev->bus);
+ pci_rescan_bus(zdev->zbus->bus);
}
out:
pci_unlock_rescan_remove();
@@ -142,6 +143,7 @@ static struct attribute *zpci_dev_attrs[] = {
&dev_attr_pchid.attr,
&dev_attr_pfgid.attr,
&dev_attr_pft.attr,
+ &dev_attr_port.attr,
&dev_attr_vfn.attr,
&dev_attr_uid.attr,
&dev_attr_recover.attr,
diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index 1137f3ddcb85..c60d5c776fc6 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -87,7 +87,7 @@ static int s390_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct s390_domain *s390_domain = to_s390_domain(domain);
- struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
+ struct zpci_dev *zdev = to_zpci_dev(dev);
struct s390_domain_device *domain_device;
unsigned long flags;
int rc;
@@ -139,7 +139,7 @@ static void s390_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
struct s390_domain *s390_domain = to_s390_domain(domain);
- struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
+ struct zpci_dev *zdev = to_zpci_dev(dev);
struct s390_domain_device *domain_device, *tmp;
unsigned long flags;
int found = 0;
@@ -169,7 +169,7 @@ static void s390_iommu_detach_device(struct iommu_domain *domain,
static int s390_iommu_add_device(struct device *dev)
{
struct iommu_group *group = iommu_group_get_for_dev(dev);
- struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
+ struct zpci_dev *zdev = to_zpci_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
@@ -182,7 +182,7 @@ static int s390_iommu_add_device(struct device *dev)
static void s390_iommu_remove_device(struct device *dev)
{
- struct zpci_dev *zdev = to_pci_dev(dev)->sysdata;
+ struct zpci_dev *zdev = to_zpci_dev(dev);
struct iommu_domain *domain;
/*
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index 39295d88f670..b59f84918fe0 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -52,6 +52,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
{
struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
hotplug_slot);
+ struct zpci_bus *zbus = zdev->zbus;
int rc;
if (zdev->state != ZPCI_FN_STATE_STANDBY)
@@ -65,9 +66,9 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
if (rc)
goto out_deconfigure;
- pci_scan_slot(zdev->bus, ZPCI_DEVFN);
+ pci_scan_slot(zbus->bus, zdev->devfn);
pci_lock_rescan_remove();
- pci_bus_add_devices(zdev->bus);
+ pci_bus_add_devices(zbus->bus);
pci_unlock_rescan_remove();
return rc;
@@ -82,13 +83,17 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
hotplug_slot);
struct pci_dev *pdev;
+ struct zpci_bus *zbus = zdev->zbus;
int rc;
if (!zpci_fn_configured(zdev->state))
return -EIO;
- pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
+ pdev = pci_get_slot(zbus->bus, zdev->devfn);
if (pdev) {
+ if (pci_num_vf(pdev))
+ return -EBUSY;
+
pci_stop_and_remove_bus_device_locked(pdev);
pci_dev_put(pdev);
}
@@ -133,12 +138,13 @@ static const struct hotplug_slot_ops s390_hotplug_slot_ops = {
int zpci_init_slot(struct zpci_dev *zdev)
{
char name[SLOT_NAME_SIZE];
+ struct zpci_bus *zbus = zdev->zbus;
zdev->hotplug_slot.ops = &s390_hotplug_slot_ops;
snprintf(name, SLOT_NAME_SIZE, "%08x", zdev->fid);
- return pci_hp_register(&zdev->hotplug_slot, zdev->bus,
- ZPCI_DEVFN, name);
+ return pci_hp_register(&zdev->hotplug_slot, zbus->bus,
+ zdev->devfn, name);
}
void zpci_exit_slot(struct zpci_dev *zdev)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 4d1f392b05f9..b37e08c4f9d1 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -133,12 +133,35 @@ static void pci_read_vf_config_common(struct pci_dev *virtfn)
&physfn->sriov->subsystem_device);
}
+int pci_iov_sysfs_link(struct pci_dev *dev,
+ struct pci_dev *virtfn, int id)
+{
+ char buf[VIRTFN_ID_LEN];
+ int rc;
+
+ sprintf(buf, "virtfn%u", id);
+ rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
+ if (rc)
+ goto failed;
+ rc = sysfs_create_link(&virtfn->dev.kobj, &dev->dev.kobj, "physfn");
+ if (rc)
+ goto failed1;
+
+ kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE);
+
+ return 0;
+
+failed1:
+ sysfs_remove_link(&dev->dev.kobj, buf);
+failed:
+ return rc;
+}
+
int pci_iov_add_virtfn(struct pci_dev *dev, int id)
{
int i;
int rc = -ENOMEM;
u64 size;
- char buf[VIRTFN_ID_LEN];
struct pci_dev *virtfn;
struct resource *res;
struct pci_sriov *iov = dev->sriov;
@@ -182,23 +205,14 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id)
}
pci_device_add(virtfn, virtfn->bus);
-
- sprintf(buf, "virtfn%u", id);
- rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
+ rc = pci_iov_sysfs_link(dev, virtfn, id);
if (rc)
goto failed1;
- rc = sysfs_create_link(&virtfn->dev.kobj, &dev->dev.kobj, "physfn");
- if (rc)
- goto failed2;
-
- kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE);
pci_bus_add_device(virtfn);
return 0;
-failed2:
- sysfs_remove_link(&dev->dev.kobj, buf);
failed1:
pci_stop_and_remove_bus_device(virtfn);
pci_dev_put(dev);
@@ -557,9 +571,6 @@ static void sriov_del_vfs(struct pci_dev *dev)
struct pci_sriov *iov = dev->sriov;
int i;
- if (dev->no_vf_scan)
- return;
-
for (i = 0; i < iov->num_VFs; i++)
pci_iov_remove_virtfn(dev, i);
}
diff --git a/drivers/s390/cio/Makefile b/drivers/s390/cio/Makefile
index 23eae4188876..a9235f111e79 100644
--- a/drivers/s390/cio/Makefile
+++ b/drivers/s390/cio/Makefile
@@ -21,5 +21,5 @@ qdio-objs := qdio_main.o qdio_thinint.o qdio_debug.o qdio_setup.o
obj-$(CONFIG_QDIO) += qdio.o
vfio_ccw-objs += vfio_ccw_drv.o vfio_ccw_cp.o vfio_ccw_ops.o vfio_ccw_fsm.o \
- vfio_ccw_async.o vfio_ccw_trace.o
+ vfio_ccw_async.o vfio_ccw_trace.o vfio_ccw_chp.o
obj-$(CONFIG_VFIO_CCW) += vfio_ccw.o
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 1ca73c2e5a8f..c314e9495c1b 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -57,6 +57,7 @@ int chsc_error_from_response(int response)
case 0x0104:
return -EINVAL;
case 0x0004:
+ case 0x0106: /* "Wrong Channel Parm" for the op 0x003d */
return -EOPNOTSUPP;
case 0x000b:
case 0x0107: /* "Channel busy" for the op 0x003d */
@@ -1336,36 +1337,35 @@ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
EXPORT_SYMBOL_GPL(chsc_scm_info);
/**
- * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
+ * chsc_pnso() - Perform Network-Subchannel Operation
* @schid: id of the subchannel on which PNSO is performed
- * @brinfo_area: request and response block for the operation
+ * @pnso_area: request and response block for the operation
* @resume_token: resume token for multiblock response
* @cnc: Boolean change-notification control
*
- * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
+ * pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
*
* Returns 0 on success.
*/
-int chsc_pnso_brinfo(struct subchannel_id schid,
- struct chsc_pnso_area *brinfo_area,
- struct chsc_brinfo_resume_token resume_token,
- int cnc)
+int chsc_pnso(struct subchannel_id schid,
+ struct chsc_pnso_area *pnso_area,
+ struct chsc_pnso_resume_token resume_token,
+ int cnc)
{
- memset(brinfo_area, 0, sizeof(*brinfo_area));
- brinfo_area->request.length = 0x0030;
- brinfo_area->request.code = 0x003d; /* network-subchannel operation */
- brinfo_area->m = schid.m;
- brinfo_area->ssid = schid.ssid;
- brinfo_area->sch = schid.sch_no;
- brinfo_area->cssid = schid.cssid;
- brinfo_area->oc = 0; /* Store-network-bridging-information list */
- brinfo_area->resume_token = resume_token;
- brinfo_area->n = (cnc != 0);
- if (chsc(brinfo_area))
+ memset(pnso_area, 0, sizeof(*pnso_area));
+ pnso_area->request.length = 0x0030;
+ pnso_area->request.code = 0x003d; /* network-subchannel operation */
+ pnso_area->m = schid.m;
+ pnso_area->ssid = schid.ssid;
+ pnso_area->sch = schid.sch_no;
+ pnso_area->cssid = schid.cssid;
+ pnso_area->oc = 0; /* Store-network-bridging-information list */
+ pnso_area->resume_token = resume_token;
+ pnso_area->n = (cnc != 0);
+ if (chsc(pnso_area))
return -EIO;
- return chsc_error_from_response(brinfo_area->response.code);
+ return chsc_error_from_response(pnso_area->response.code);
}
-EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
int chsc_sgib(u32 origin)
{
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 34de6d77442c..7ecf7e4c402e 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -205,52 +205,10 @@ struct chsc_scm_info {
int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
-struct chsc_brinfo_resume_token {
- u64 t1;
- u64 t2;
-} __packed;
-
-struct chsc_brinfo_naihdr {
- struct chsc_brinfo_resume_token resume_token;
- u32:32;
- u32 instance;
- u32:24;
- u8 naids;
- u32 reserved[3];
-} __packed;
-
-struct chsc_pnso_area {
- struct chsc_header request;
- u8:2;
- u8 m:1;
- u8:5;
- u8:2;
- u8 ssid:2;
- u8 fmt:4;
- u16 sch;
- u8:8;
- u8 cssid;
- u16:16;
- u8 oc;
- u32:24;
- struct chsc_brinfo_resume_token resume_token;
- u32 n:1;
- u32:31;
- u32 reserved[3];
- struct chsc_header response;
- u32:32;
- struct chsc_brinfo_naihdr naihdr;
- union {
- struct qdio_brinfo_entry_l3_ipv6 l3_ipv6[0];
- struct qdio_brinfo_entry_l3_ipv4 l3_ipv4[0];
- struct qdio_brinfo_entry_l2 l2[0];
- } entries;
-} __packed __aligned(PAGE_SIZE);
-
-int chsc_pnso_brinfo(struct subchannel_id schid,
- struct chsc_pnso_area *brinfo_area,
- struct chsc_brinfo_resume_token resume_token,
- int cnc);
+int chsc_pnso(struct subchannel_id schid,
+ struct chsc_pnso_area *pnso_area,
+ struct chsc_pnso_resume_token resume_token,
+ int cnc);
int __init chsc_get_cssid(int idx);
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index ccecf6b9504e..963fcc9054c6 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -710,6 +710,29 @@ void ccw_device_get_schid(struct ccw_device *cdev, struct subchannel_id *schid)
}
EXPORT_SYMBOL_GPL(ccw_device_get_schid);
+/**
+ * ccw_device_pnso() - Perform Network-Subchannel Operation
+ * @cdev: device on which PNSO is performed
+ * @pnso_area: request and response block for the operation
+ * @resume_token: resume token for multiblock response
+ * @cnc: Boolean change-notification control
+ *
+ * pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
+ *
+ * Returns 0 on success.
+ */
+int ccw_device_pnso(struct ccw_device *cdev,
+ struct chsc_pnso_area *pnso_area,
+ struct chsc_pnso_resume_token resume_token,
+ int cnc)
+{
+ struct subchannel_id schid;
+
+ ccw_device_get_schid(cdev, &schid);
+ return chsc_pnso(schid, pnso_area, resume_token, cnc);
+}
+EXPORT_SYMBOL_GPL(ccw_device_pnso);
+
/*
* Allocate zeroed dma coherent 31 bit addressable memory using
* the subchannels dma pool. Maximal size of allocation supported
diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index 77d0ea7b381b..45f9c0736be4 100644
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -59,18 +59,6 @@ static inline int idset_contains(struct idset *set, int ssid, int id)
return test_bit(ssid * set->num_id + id, set->bitmap);
}
-static inline int idset_get_first(struct idset *set, int *ssid, int *id)
-{
- int bitnum;
-
- bitnum = find_first_bit(set->bitmap, set->num_ssid * set->num_id);
- if (bitnum >= set->num_ssid * set->num_id)
- return 0;
- *ssid = bitnum / set->num_id;
- *id = bitnum % set->num_id;
- return 1;
-}
-
struct idset *idset_sch_new(void)
{
return idset_new(max_ssid + 1, __MAX_SUBCHANNEL + 1);
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index b8453b594679..eb13c479e11d 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -221,9 +221,6 @@ struct qdio_q {
*/
int first_to_check;
- /* beginning position for calling the program */
- int first_to_kick;
-
/* number of buffers in use by the adapter */
atomic_t nr_buf_used;
@@ -292,6 +289,8 @@ struct qdio_irq {
struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
+ unsigned int max_input_qs;
+ unsigned int max_output_qs;
void (*irq_poll)(struct ccw_device *cdev, unsigned long data);
unsigned long poll_state;
@@ -364,16 +363,13 @@ static inline int multicast_outbound(struct qdio_q *q)
extern u64 last_ai_time;
/* prototypes for thin interrupt */
-void qdio_setup_thinint(struct qdio_irq *irq_ptr);
int qdio_establish_thinint(struct qdio_irq *irq_ptr);
void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
void tiqdio_add_device(struct qdio_irq *irq_ptr);
void tiqdio_remove_device(struct qdio_irq *irq_ptr);
void tiqdio_inbound_processing(unsigned long q);
-int tiqdio_allocate_memory(void);
-void tiqdio_free_memory(void);
-int tiqdio_register_thinints(void);
-void tiqdio_unregister_thinints(void);
+int qdio_thinint_init(void);
+void qdio_thinint_exit(void);
int test_nonshared_ind(struct qdio_irq *);
/* prototypes for setup */
@@ -389,8 +385,10 @@ int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
struct subchannel_id *schid,
struct qdio_ssqd_desc *data);
int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data);
+void qdio_shutdown_irq(struct qdio_irq *irq);
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr);
-void qdio_release_memory(struct qdio_irq *irq_ptr);
+void qdio_free_queues(struct qdio_irq *irq_ptr);
+void qdio_free_async_data(struct qdio_irq *irq_ptr);
int qdio_setup_init(void);
void qdio_setup_exit(void);
int qdio_enable_async_operation(struct qdio_output_q *q);
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index bcc3ab14e72d..610c05f59589 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -143,7 +143,7 @@ static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE, q->nr,
- q->first_to_kick, count, q->irq_ptr->int_parm);
+ q->first_to_check, count, q->irq_ptr->int_parm);
return 0;
}
}
@@ -191,7 +191,7 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE, q->nr,
- q->first_to_kick, count, q->irq_ptr->int_parm);
+ q->first_to_check, count, q->irq_ptr->int_parm);
return 0;
}
}
@@ -438,15 +438,12 @@ static void process_buffer_error(struct qdio_q *q, unsigned int start,
q->sbal[start]->element[15].sflags);
}
-static inline void inbound_primed(struct qdio_q *q, unsigned int start,
- int count)
+static inline void inbound_handle_work(struct qdio_q *q, unsigned int start,
+ int count, bool auto_ack)
{
int new;
- DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim:%1d %02x", q->nr, count);
-
- /* for QEBSM the ACK was already set by EQBS */
- if (is_qebsm(q)) {
+ if (auto_ack) {
if (!q->u.in.ack_count) {
q->u.in.ack_count = count;
q->u.in.ack_start = start;
@@ -466,15 +463,14 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start,
* or by the next inbound run.
*/
new = add_buf(start, count - 1);
- if (q->u.in.ack_count) {
- /* reset the previous ACK but first set the new one */
- set_buf_state(q, new, SLSB_P_INPUT_ACK);
- set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
- } else {
- q->u.in.ack_count = 1;
- set_buf_state(q, new, SLSB_P_INPUT_ACK);
- }
+ set_buf_state(q, new, SLSB_P_INPUT_ACK);
+
+ /* delete the previous ACKs */
+ if (q->u.in.ack_count)
+ set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
+ q->u.in.ack_count);
+ q->u.in.ack_count = 1;
q->u.in.ack_start = new;
count--;
if (!count)
@@ -508,19 +504,21 @@ static int get_inbound_buffer_frontier(struct qdio_q *q, unsigned int start)
switch (state) {
case SLSB_P_INPUT_PRIMED:
- inbound_primed(q, start, count);
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim:%1d %02x", q->nr,
+ count);
+
+ inbound_handle_work(q, start, count, is_qebsm(q));
if (atomic_sub_return(count, &q->nr_buf_used) == 0)
qperf_inc(q, inbound_queue_full);
if (q->irq_ptr->perf_stat_enabled)
account_sbals(q, count);
return count;
case SLSB_P_INPUT_ERROR:
+ DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in err:%1d %02x", q->nr,
+ count);
+
process_buffer_error(q, start, count);
- /*
- * Interrupts may be avoided as long as the error is present
- * so change the buffer state immediately to avoid starvation.
- */
- set_buf_states(q, start, SLSB_P_INPUT_NOT_INIT, count);
+ inbound_handle_work(q, start, count, false);
if (atomic_sub_return(count, &q->nr_buf_used) == 0)
qperf_inc(q, inbound_queue_full);
if (q->irq_ptr->perf_stat_enabled)
@@ -624,10 +622,9 @@ static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
return phys_aob;
}
-static void qdio_kick_handler(struct qdio_q *q, unsigned int count)
+static void qdio_kick_handler(struct qdio_q *q, unsigned int start,
+ unsigned int count)
{
- int start = q->first_to_kick;
-
if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
return;
@@ -644,7 +641,6 @@ static void qdio_kick_handler(struct qdio_q *q, unsigned int count)
q->irq_ptr->int_parm);
/* for the next time */
- q->first_to_kick = add_buf(start, count);
q->qdio_error = 0;
}
@@ -668,9 +664,9 @@ static void __qdio_inbound_processing(struct qdio_q *q)
if (count == 0)
return;
+ qdio_kick_handler(q, start, count);
start = add_buf(start, count);
q->first_to_check = start;
- qdio_kick_handler(q, count);
if (!qdio_inbound_q_done(q, start)) {
/* means poll time is not yet over */
@@ -826,7 +822,7 @@ static void __qdio_outbound_processing(struct qdio_q *q)
count = qdio_outbound_q_moved(q, start);
if (count) {
q->first_to_check = add_buf(start, count);
- qdio_kick_handler(q, count);
+ qdio_kick_handler(q, start, count);
}
if (queue_type(q) == QDIO_ZFCP_QFMT && !pci_out_supported(q->irq_ptr) &&
@@ -880,47 +876,17 @@ static inline void qdio_check_outbound_pci_queues(struct qdio_irq *irq)
qdio_tasklet_schedule(out);
}
-static void __tiqdio_inbound_processing(struct qdio_q *q)
+void tiqdio_inbound_processing(unsigned long data)
{
- unsigned int start = q->first_to_check;
- int count;
+ struct qdio_q *q = (struct qdio_q *)data;
- qperf_inc(q, tasklet_inbound);
if (need_siga_sync(q) && need_siga_sync_after_ai(q))
qdio_sync_queues(q);
/* The interrupt could be caused by a PCI request: */
qdio_check_outbound_pci_queues(q->irq_ptr);
- count = qdio_inbound_q_moved(q, start);
- if (count == 0)
- return;
-
- start = add_buf(start, count);
- q->first_to_check = start;
- qdio_kick_handler(q, count);
-
- if (!qdio_inbound_q_done(q, start)) {
- qperf_inc(q, tasklet_inbound_resched);
- if (!qdio_tasklet_schedule(q))
- return;
- }
-
- qdio_stop_polling(q);
- /*
- * We need to check again to not lose initiative after
- * resetting the ACK state.
- */
- if (!qdio_inbound_q_done(q, start)) {
- qperf_inc(q, tasklet_inbound_resched2);
- qdio_tasklet_schedule(q);
- }
-}
-
-void tiqdio_inbound_processing(unsigned long data)
-{
- struct qdio_q *q = (struct qdio_q *)data;
- __tiqdio_inbound_processing(q);
+ __qdio_inbound_processing(q);
}
static inline void qdio_set_state(struct qdio_irq *irq_ptr,
@@ -977,7 +943,6 @@ static void qdio_handle_activate_check(struct ccw_device *cdev,
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
struct qdio_q *q;
- int count;
DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no);
DBF_ERROR("intp :%lx", intparm);
@@ -992,9 +957,8 @@ static void qdio_handle_activate_check(struct ccw_device *cdev,
goto no_handler;
}
- count = sub_buf(q->first_to_check, q->first_to_kick);
q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE,
- q->nr, q->first_to_kick, count, irq_ptr->int_parm);
+ q->nr, q->first_to_check, 0, irq_ptr->int_parm);
no_handler:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
/*
@@ -1154,35 +1118,27 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
/* cleanup subchannel */
spin_lock_irq(get_ccwdev_lock(cdev));
-
+ qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
if (how & QDIO_FLAG_CLEANUP_USING_CLEAR)
rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
else
/* default behaviour is halt */
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
+ spin_unlock_irq(get_ccwdev_lock(cdev));
if (rc) {
DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4d", rc);
goto no_cleanup;
}
- qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
- spin_unlock_irq(get_ccwdev_lock(cdev));
wait_event_interruptible_timeout(cdev->private->wait_q,
irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
irq_ptr->state == QDIO_IRQ_STATE_ERR,
10 * HZ);
- spin_lock_irq(get_ccwdev_lock(cdev));
no_cleanup:
qdio_shutdown_thinint(irq_ptr);
-
- /* restore interrupt handler */
- if ((void *)cdev->handler == (void *)qdio_int_handler) {
- cdev->handler = irq_ptr->orig_handler;
- cdev->private->intparm = 0;
- }
- spin_unlock_irq(get_ccwdev_lock(cdev));
+ qdio_shutdown_irq(irq_ptr);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
mutex_unlock(&irq_ptr->setup_mutex);
@@ -1213,7 +1169,11 @@ int qdio_free(struct ccw_device *cdev)
cdev->private->qdio_data = NULL;
mutex_unlock(&irq_ptr->setup_mutex);
- qdio_release_memory(irq_ptr);
+ qdio_free_async_data(irq_ptr);
+ qdio_free_queues(irq_ptr);
+ free_page((unsigned long) irq_ptr->qdr);
+ free_page(irq_ptr->chsc_page);
+ free_page((unsigned long) irq_ptr);
return 0;
}
EXPORT_SYMBOL_GPL(qdio_free);
@@ -1229,6 +1189,7 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
{
struct subchannel_id schid;
struct qdio_irq *irq_ptr;
+ int rc = -ENOMEM;
ccw_device_get_schid(cdev, &schid);
DBF_EVENT("qallocate:%4x", schid.sch_no);
@@ -1240,12 +1201,12 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
/* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr)
- goto out_err;
+ return -ENOMEM;
irq_ptr->cdev = cdev;
mutex_init(&irq_ptr->setup_mutex);
if (qdio_allocate_dbf(irq_ptr))
- goto out_rel;
+ goto err_dbf;
DBF_DEV_EVENT(DBF_ERR, irq_ptr, "alloc niq:%1u noq:%1u", no_input_qs,
no_output_qs);
@@ -1258,24 +1219,30 @@ int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
*/
irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL);
if (!irq_ptr->chsc_page)
- goto out_rel;
+ goto err_chsc;
/* qdr is used in ccw1.cda which is u32 */
irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!irq_ptr->qdr)
- goto out_rel;
+ goto err_qdr;
- if (qdio_allocate_qs(irq_ptr, no_input_qs, no_output_qs))
- goto out_rel;
+ rc = qdio_allocate_qs(irq_ptr, no_input_qs, no_output_qs);
+ if (rc)
+ goto err_queues;
INIT_LIST_HEAD(&irq_ptr->entry);
cdev->private->qdio_data = irq_ptr;
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
return 0;
-out_rel:
- qdio_release_memory(irq_ptr);
-out_err:
- return -ENOMEM;
+
+err_queues:
+ free_page((unsigned long) irq_ptr->qdr);
+err_qdr:
+ free_page(irq_ptr->chsc_page);
+err_chsc:
+err_dbf:
+ free_page((unsigned long) irq_ptr);
+ return rc;
}
EXPORT_SYMBOL_GPL(qdio_allocate);
@@ -1338,6 +1305,10 @@ int qdio_establish(struct ccw_device *cdev,
if (!irq_ptr)
return -ENODEV;
+ if (init_data->no_input_qs > irq_ptr->max_input_qs ||
+ init_data->no_output_qs > irq_ptr->max_output_qs)
+ return -EINVAL;
+
if ((init_data->no_input_qs && !init_data->input_handler) ||
(init_data->no_output_qs && !init_data->output_handler))
return -EINVAL;
@@ -1352,8 +1323,8 @@ int qdio_establish(struct ccw_device *cdev,
rc = qdio_establish_thinint(irq_ptr);
if (rc) {
+ qdio_shutdown_irq(irq_ptr);
mutex_unlock(&irq_ptr->setup_mutex);
- qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
return rc;
}
@@ -1371,8 +1342,9 @@ int qdio_establish(struct ccw_device *cdev,
if (rc) {
DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no);
DBF_ERROR("rc:%4x", rc);
+ qdio_shutdown_thinint(irq_ptr);
+ qdio_shutdown_irq(irq_ptr);
mutex_unlock(&irq_ptr->setup_mutex);
- qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
return rc;
}
@@ -1460,25 +1432,6 @@ int qdio_activate(struct ccw_device *cdev)
}
EXPORT_SYMBOL_GPL(qdio_activate);
-static inline int buf_in_between(int bufnr, int start, int count)
-{
- int end = add_buf(start, count);
-
- if (end > start) {
- if (bufnr >= start && bufnr < end)
- return 1;
- else
- return 0;
- }
-
- /* wrap-around case */
- if ((bufnr >= start && bufnr <= QDIO_MAX_BUFFERS_PER_Q) ||
- (bufnr < end))
- return 1;
- else
- return 0;
-}
-
/**
* handle_inbound - reset processed input buffers
* @q: queue containing the buffers
@@ -1489,36 +1442,18 @@ static inline int buf_in_between(int bufnr, int start, int count)
static int handle_inbound(struct qdio_q *q, unsigned int callflags,
int bufnr, int count)
{
- int diff;
+ int overlap;
qperf_inc(q, inbound_call);
- if (!q->u.in.ack_count)
- goto set;
-
- /* protect against stop polling setting an ACK for an emptied slsb */
- if (count == QDIO_MAX_BUFFERS_PER_Q) {
- /* overwriting everything, just delete polling status */
- q->u.in.ack_count = 0;
- goto set;
- } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) {
- if (is_qebsm(q)) {
- /* partial overwrite, just update ack_start */
- diff = add_buf(bufnr, count);
- diff = sub_buf(diff, q->u.in.ack_start);
- q->u.in.ack_count -= diff;
- if (q->u.in.ack_count <= 0) {
- q->u.in.ack_count = 0;
- goto set;
- }
- q->u.in.ack_start = add_buf(q->u.in.ack_start, diff);
- } else {
- /* the only ACK will be deleted */
- q->u.in.ack_count = 0;
- }
+ /* If any ACKed SBALs are returned to HW, adjust ACK tracking: */
+ overlap = min(count - sub_buf(q->u.in.ack_start, bufnr),
+ q->u.in.ack_count);
+ if (overlap > 0) {
+ q->u.in.ack_start = add_buf(q->u.in.ack_start, overlap);
+ q->u.in.ack_count -= overlap;
}
-set:
count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count);
atomic_add(count, &q->nr_buf_used);
@@ -1627,7 +1562,7 @@ int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
EXPORT_SYMBOL_GPL(do_QDIO);
/**
- * qdio_start_irq - process input buffers
+ * qdio_start_irq - enable interrupt processing for the device
* @cdev: associated ccw_device for the qdio subchannel
*
* Return codes
@@ -1770,94 +1705,6 @@ int qdio_stop_irq(struct ccw_device *cdev)
}
EXPORT_SYMBOL(qdio_stop_irq);
-/**
- * qdio_pnso_brinfo() - perform network subchannel op #0 - bridge info.
- * @schid: Subchannel ID.
- * @cnc: Boolean Change-Notification Control
- * @response: Response code will be stored at this address
- * @cb: Callback function will be executed for each element
- * of the address list
- * @priv: Pointer to pass to the callback function.
- *
- * Performs "Store-network-bridging-information list" operation and calls
- * the callback function for every entry in the list. If "change-
- * notification-control" is set, further changes in the address list
- * will be reported via the IPA command.
- */
-int qdio_pnso_brinfo(struct subchannel_id schid,
- int cnc, u16 *response,
- void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
- void *entry),
- void *priv)
-{
- struct chsc_pnso_area *rr;
- int rc;
- u32 prev_instance = 0;
- int isfirstblock = 1;
- int i, size, elems;
-
- rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
- if (rr == NULL)
- return -ENOMEM;
- do {
- /* on the first iteration, naihdr.resume_token will be zero */
- rc = chsc_pnso_brinfo(schid, rr, rr->naihdr.resume_token, cnc);
- if (rc != 0 && rc != -EBUSY)
- goto out;
- if (rr->response.code != 1) {
- rc = -EIO;
- continue;
- } else
- rc = 0;
-
- if (cb == NULL)
- continue;
-
- size = rr->naihdr.naids;
- elems = (rr->response.length -
- sizeof(struct chsc_header) -
- sizeof(struct chsc_brinfo_naihdr)) /
- size;
-
- if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
- /* Inform the caller that they need to scrap */
- /* the data that was already reported via cb */
- rc = -EAGAIN;
- break;
- }
- isfirstblock = 0;
- prev_instance = rr->naihdr.instance;
- for (i = 0; i < elems; i++)
- switch (size) {
- case sizeof(struct qdio_brinfo_entry_l3_ipv6):
- (*cb)(priv, l3_ipv6_addr,
- &rr->entries.l3_ipv6[i]);
- break;
- case sizeof(struct qdio_brinfo_entry_l3_ipv4):
- (*cb)(priv, l3_ipv4_addr,
- &rr->entries.l3_ipv4[i]);
- break;
- case sizeof(struct qdio_brinfo_entry_l2):
- (*cb)(priv, l2_addr_lnid,
- &rr->entries.l2[i]);
- break;
- default:
- WARN_ON_ONCE(1);
- rc = -EIO;
- goto out;
- }
- } while (rr->response.code == 0x0107 || /* channel busy */
- (rr->response.code == 1 && /* list stored */
- /* resume token is non-zero => list incomplete */
- (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
- (*response) = rr->response.code;
-
-out:
- free_page((unsigned long)rr);
- return rc;
-}
-EXPORT_SYMBOL_GPL(qdio_pnso_brinfo);
-
static int __init init_QDIO(void)
{
int rc;
@@ -1868,16 +1715,11 @@ static int __init init_QDIO(void)
rc = qdio_setup_init();
if (rc)
goto out_debug;
- rc = tiqdio_allocate_memory();
+ rc = qdio_thinint_init();
if (rc)
goto out_cache;
- rc = tiqdio_register_thinints();
- if (rc)
- goto out_ti;
return 0;
-out_ti:
- tiqdio_free_memory();
out_cache:
qdio_setup_exit();
out_debug:
@@ -1887,8 +1729,7 @@ static int __init init_QDIO(void)
static void __exit exit_QDIO(void)
{
- tiqdio_unregister_thinints();
- tiqdio_free_memory();
+ qdio_thinint_exit();
qdio_setup_exit();
qdio_debug_exit();
}
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 3083edd61f0c..2c5cc6ec668e 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -135,6 +135,27 @@ static void set_impl_params(struct qdio_irq *irq_ptr,
}
}
+static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
+{
+ struct qdio_q *q;
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ q = queues[i];
+ free_page((unsigned long) q->slib);
+ kmem_cache_free(qdio_q_cache, q);
+ }
+}
+
+void qdio_free_queues(struct qdio_irq *irq_ptr)
+{
+ __qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
+ irq_ptr->max_input_qs = 0;
+
+ __qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
+ irq_ptr->max_output_qs = 0;
+}
+
static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
{
struct qdio_q *q;
@@ -142,12 +163,15 @@ static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
for (i = 0; i < nr_queues; i++) {
q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
- if (!q)
+ if (!q) {
+ __qdio_free_queues(irq_ptr_qs, i);
return -ENOMEM;
+ }
q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
if (!q->slib) {
kmem_cache_free(qdio_q_cache, q);
+ __qdio_free_queues(irq_ptr_qs, i);
return -ENOMEM;
}
irq_ptr_qs[i] = q;
@@ -162,8 +186,16 @@ int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs
rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
if (rc)
return rc;
+
rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
- return rc;
+ if (rc) {
+ __qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
+ return rc;
+ }
+
+ irq_ptr->max_input_qs = nr_input_qs;
+ irq_ptr->max_output_qs = nr_output_qs;
+ return 0;
}
static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
@@ -347,45 +379,28 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
}
-void qdio_release_memory(struct qdio_irq *irq_ptr)
+void qdio_free_async_data(struct qdio_irq *irq_ptr)
{
struct qdio_q *q;
int i;
- /*
- * Must check queue array manually since irq_ptr->nr_input_queues /
- * irq_ptr->nr_input_queues may not yet be set.
- */
- for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
- q = irq_ptr->input_qs[i];
- if (q) {
- free_page((unsigned long) q->slib);
- kmem_cache_free(qdio_q_cache, q);
- }
- }
- for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
+ for (i = 0; i < irq_ptr->max_output_qs; i++) {
q = irq_ptr->output_qs[i];
- if (q) {
- if (q->u.out.use_cq) {
- int n;
-
- for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
- struct qaob *aob = q->u.out.aobs[n];
- if (aob) {
- qdio_release_aob(aob);
- q->u.out.aobs[n] = NULL;
- }
- }
+ if (q->u.out.use_cq) {
+ unsigned int n;
+
+ for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; n++) {
+ struct qaob *aob = q->u.out.aobs[n];
- qdio_disable_async_operation(&q->u.out);
+ if (aob) {
+ qdio_release_aob(aob);
+ q->u.out.aobs[n] = NULL;
+ }
}
- free_page((unsigned long) q->slib);
- kmem_cache_free(qdio_q_cache, q);
+
+ qdio_disable_async_operation(&q->u.out);
}
}
- free_page((unsigned long) irq_ptr->qdr);
- free_page(irq_ptr->chsc_page);
- free_page((unsigned long) irq_ptr);
}
static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
@@ -480,7 +495,6 @@ int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
}
setup_qib(irq_ptr, init_data);
- qdio_setup_thinint(irq_ptr);
set_impl_params(irq_ptr, init_data->qib_param_field_format,
init_data->qib_param_field,
init_data->input_slib_elements,
@@ -491,6 +505,12 @@ int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
/* qdr, qib, sls, slsbs, slibs, sbales are filled now */
+ /* set our IRQ handler */
+ spin_lock_irq(get_ccwdev_lock(cdev));
+ irq_ptr->orig_handler = cdev->handler;
+ cdev->handler = qdio_int_handler;
+ spin_unlock_irq(get_ccwdev_lock(cdev));
+
/* get qdio commands */
ciw = ccw_device_get_ciw(cdev, CIW_TYPE_EQUEUE);
if (!ciw) {
@@ -506,12 +526,18 @@ int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
}
irq_ptr->aqueue = *ciw;
- /* set new interrupt handler */
+ return 0;
+}
+
+void qdio_shutdown_irq(struct qdio_irq *irq)
+{
+ struct ccw_device *cdev = irq->cdev;
+
+ /* restore IRQ handler */
spin_lock_irq(get_ccwdev_lock(cdev));
- irq_ptr->orig_handler = cdev->handler;
- cdev->handler = qdio_int_handler;
+ cdev->handler = irq->orig_handler;
+ cdev->private->intparm = 0;
spin_unlock_irq(get_ccwdev_lock(cdev));
- return 0;
}
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index ae50373617cd..7a440e4328cd 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -197,47 +197,21 @@ static int set_subchannel_ind(struct qdio_irq *irq_ptr, int reset)
return rc;
}
-/* allocate non-shared indicators and shared indicator */
-int __init tiqdio_allocate_memory(void)
-{
- q_indicators = kcalloc(TIQDIO_NR_INDICATORS,
- sizeof(struct indicator_t),
- GFP_KERNEL);
- if (!q_indicators)
- return -ENOMEM;
- return 0;
-}
-
-void tiqdio_free_memory(void)
-{
- kfree(q_indicators);
-}
-
-int __init tiqdio_register_thinints(void)
+int qdio_establish_thinint(struct qdio_irq *irq_ptr)
{
int rc;
- rc = register_adapter_interrupt(&tiqdio_airq);
- if (rc) {
- DBF_EVENT("RTI:%x", rc);
- return rc;
- }
- return 0;
-}
-
-int qdio_establish_thinint(struct qdio_irq *irq_ptr)
-{
if (!is_thinint_irq(irq_ptr))
return 0;
- return set_subchannel_ind(irq_ptr, 0);
-}
-void qdio_setup_thinint(struct qdio_irq *irq_ptr)
-{
- if (!is_thinint_irq(irq_ptr))
- return;
irq_ptr->dsci = get_indicator();
DBF_HEX(&irq_ptr->dsci, sizeof(void *));
+
+ rc = set_subchannel_ind(irq_ptr, 0);
+ if (rc)
+ put_indicator(irq_ptr->dsci);
+
+ return rc;
}
void qdio_shutdown_thinint(struct qdio_irq *irq_ptr)
@@ -250,8 +224,27 @@ void qdio_shutdown_thinint(struct qdio_irq *irq_ptr)
put_indicator(irq_ptr->dsci);
}
-void __exit tiqdio_unregister_thinints(void)
+int __init qdio_thinint_init(void)
+{
+ int rc;
+
+ q_indicators = kcalloc(TIQDIO_NR_INDICATORS, sizeof(struct indicator_t),
+ GFP_KERNEL);
+ if (!q_indicators)
+ return -ENOMEM;
+
+ rc = register_adapter_interrupt(&tiqdio_airq);
+ if (rc) {
+ DBF_EVENT("RTI:%x", rc);
+ kfree(q_indicators);
+ return rc;
+ }
+ return 0;
+}
+
+void __exit qdio_thinint_exit(void)
{
WARN_ON(!list_empty(&tiq_list));
unregister_adapter_interrupt(&tiqdio_airq);
+ kfree(q_indicators);
}
diff --git a/drivers/s390/cio/vfio_ccw_chp.c b/drivers/s390/cio/vfio_ccw_chp.c
new file mode 100644
index 000000000000..a646fc81c872
--- /dev/null
+++ b/drivers/s390/cio/vfio_ccw_chp.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Channel path related status regions for vfio_ccw
+ *
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s): Farhan Ali <alifm@...ux.ibm.com>
+ * Eric Farman <farman@...ux.ibm.com>
+ */
+
+#include <linux/vfio.h>
+#include "vfio_ccw_private.h"
+
+static ssize_t vfio_ccw_schib_region_read(struct vfio_ccw_private *private,
+ char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ unsigned int i = VFIO_CCW_OFFSET_TO_INDEX(*ppos) - VFIO_CCW_NUM_REGIONS;
+ loff_t pos = *ppos & VFIO_CCW_OFFSET_MASK;
+ struct ccw_schib_region *region;
+ int ret;
+
+ if (pos + count > sizeof(*region))
+ return -EINVAL;
+
+ mutex_lock(&private->io_mutex);
+ region = private->region[i].data;
+
+ if (cio_update_schib(private->sch)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ memcpy(region, &private->sch->schib, sizeof(*region));
+
+ if (copy_to_user(buf, (void *)region + pos, count)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ ret = count;
+
+out:
+ mutex_unlock(&private->io_mutex);
+ return ret;
+}
+
+static ssize_t vfio_ccw_schib_region_write(struct vfio_ccw_private *private,
+ const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ return -EINVAL;
+}
+
+
+static void vfio_ccw_schib_region_release(struct vfio_ccw_private *private,
+ struct vfio_ccw_region *region)
+{
+
+}
+
+static const struct vfio_ccw_regops vfio_ccw_schib_region_ops = {
+ .read = vfio_ccw_schib_region_read,
+ .write = vfio_ccw_schib_region_write,
+ .release = vfio_ccw_schib_region_release,
+};
+
+int vfio_ccw_register_schib_dev_regions(struct vfio_ccw_private *private)
+{
+ return vfio_ccw_register_dev_region(private,
+ VFIO_REGION_SUBTYPE_CCW_SCHIB,
+ &vfio_ccw_schib_region_ops,
+ sizeof(struct ccw_schib_region),
+ VFIO_REGION_INFO_FLAG_READ,
+ private->schib_region);
+}
+
+static ssize_t vfio_ccw_crw_region_read(struct vfio_ccw_private *private,
+ char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ unsigned int i = VFIO_CCW_OFFSET_TO_INDEX(*ppos) - VFIO_CCW_NUM_REGIONS;
+ loff_t pos = *ppos & VFIO_CCW_OFFSET_MASK;
+ struct ccw_crw_region *region;
+ struct vfio_ccw_crw *crw;
+ int ret;
+
+ if (pos + count > sizeof(*region))
+ return -EINVAL;
+
+ crw = list_first_entry_or_null(&private->crw,
+ struct vfio_ccw_crw, next);
+
+ if (crw)
+ list_del(&crw->next);
+
+ mutex_lock(&private->io_mutex);
+ region = private->region[i].data;
+
+ if (crw)
+ memcpy(®ion->crw, &crw->crw, sizeof(region->crw));
+
+ if (copy_to_user(buf, (void *)region + pos, count))
+ ret = -EFAULT;
+ else
+ ret = count;
+
+ region->crw = 0;
+
+ mutex_unlock(&private->io_mutex);
+
+ kfree(crw);
+
+ /* Notify the guest if more CRWs are on our queue */
+ if (!list_empty(&private->crw) && private->crw_trigger)
+ eventfd_signal(private->crw_trigger, 1);
+
+ return ret;
+}
+
+static ssize_t vfio_ccw_crw_region_write(struct vfio_ccw_private *private,
+ const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ return -EINVAL;
+}
+
+static void vfio_ccw_crw_region_release(struct vfio_ccw_private *private,
+ struct vfio_ccw_region *region)
+{
+
+}
+
+static const struct vfio_ccw_regops vfio_ccw_crw_region_ops = {
+ .read = vfio_ccw_crw_region_read,
+ .write = vfio_ccw_crw_region_write,
+ .release = vfio_ccw_crw_region_release,
+};
+
+int vfio_ccw_register_crw_dev_regions(struct vfio_ccw_private *private)
+{
+ return vfio_ccw_register_dev_region(private,
+ VFIO_REGION_SUBTYPE_CCW_CRW,
+ &vfio_ccw_crw_region_ops,
+ sizeof(struct ccw_crw_region),
+ VFIO_REGION_INFO_FLAG_READ,
+ private->crw_region);
+}
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c
index 3645d1720c4b..b9febc581b1f 100644
--- a/drivers/s390/cio/vfio_ccw_cp.c
+++ b/drivers/s390/cio/vfio_ccw_cp.c
@@ -8,6 +8,7 @@
* Xiao Feng Ren <renxiaof@...ux.vnet.ibm.com>
*/
+#include <linux/ratelimit.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/iommu.h>
@@ -625,23 +626,27 @@ static int ccwchain_fetch_one(struct ccwchain *chain,
* the target channel program from @orb->cmd.iova to the new ccwchain(s).
*
* Limitations:
- * 1. Supports only prefetch enabled mode.
- * 2. Supports idal(c64) ccw chaining.
- * 3. Supports 4k idaw.
+ * 1. Supports idal(c64) ccw chaining.
+ * 2. Supports 4k idaw.
*
* Returns:
* %0 on success and a negative error value on failure.
*/
int cp_init(struct channel_program *cp, struct device *mdev, union orb *orb)
{
+ /* custom ratelimit used to avoid flood during guest IPL */
+ static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 1);
int ret;
/*
- * XXX:
- * Only support prefetch enable mode now.
+ * We only support prefetching the channel program. We assume all channel
+ * programs executed by supported guests likewise support prefetching.
+ * Executing a channel program that does not specify prefetching will
+ * typically not cause an error, but a warning is issued to help identify
+ * the problem if something does break.
*/
- if (!orb->cmd.pfch)
- return -EOPNOTSUPP;
+ if (!orb->cmd.pfch && __ratelimit(&ratelimit_state))
+ dev_warn(mdev, "Prefetching channel program even though prefetch not specified in ORB");
INIT_LIST_HEAD(&cp->ccwchain_list);
memcpy(&cp->orb, orb, sizeof(*orb));
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 339a6bc0339b..8c625b530035 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -19,6 +19,7 @@
#include <asm/isc.h>
+#include "chp.h"
#include "ioasm.h"
#include "css.h"
#include "vfio_ccw_private.h"
@@ -26,6 +27,8 @@
struct workqueue_struct *vfio_ccw_work_q;
static struct kmem_cache *vfio_ccw_io_region;
static struct kmem_cache *vfio_ccw_cmd_region;
+static struct kmem_cache *vfio_ccw_schib_region;
+static struct kmem_cache *vfio_ccw_crw_region;
debug_info_t *vfio_ccw_debug_msg_id;
debug_info_t *vfio_ccw_debug_trace_id;
@@ -105,6 +108,16 @@ static void vfio_ccw_sch_io_todo(struct work_struct *work)
eventfd_signal(private->io_trigger, 1);
}
+static void vfio_ccw_crw_todo(struct work_struct *work)
+{
+ struct vfio_ccw_private *private;
+
+ private = container_of(work, struct vfio_ccw_private, crw_work);
+
+ if (!list_empty(&private->crw) && private->crw_trigger)
+ eventfd_signal(private->crw_trigger, 1);
+}
+
/*
* Css driver callbacks
*/
@@ -116,6 +129,18 @@ static void vfio_ccw_sch_irq(struct subchannel *sch)
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT);
}
+static void vfio_ccw_free_regions(struct vfio_ccw_private *private)
+{
+ if (private->crw_region)
+ kmem_cache_free(vfio_ccw_crw_region, private->crw_region);
+ if (private->schib_region)
+ kmem_cache_free(vfio_ccw_schib_region, private->schib_region);
+ if (private->cmd_region)
+ kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
+ if (private->io_region)
+ kmem_cache_free(vfio_ccw_io_region, private->io_region);
+}
+
static int vfio_ccw_sch_probe(struct subchannel *sch)
{
struct pmcw *pmcw = &sch->schib.pmcw;
@@ -147,6 +172,18 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
if (!private->cmd_region)
goto out_free;
+ private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region,
+ GFP_KERNEL | GFP_DMA);
+
+ if (!private->schib_region)
+ goto out_free;
+
+ private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region,
+ GFP_KERNEL | GFP_DMA);
+
+ if (!private->crw_region)
+ goto out_free;
+
private->sch = sch;
dev_set_drvdata(&sch->dev, private);
mutex_init(&private->io_mutex);
@@ -159,7 +196,9 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
if (ret)
goto out_free;
+ INIT_LIST_HEAD(&private->crw);
INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo);
+ INIT_WORK(&private->crw_work, vfio_ccw_crw_todo);
atomic_set(&private->avail, 1);
private->state = VFIO_CCW_STATE_STANDBY;
@@ -181,10 +220,7 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
cio_disable_subchannel(sch);
out_free:
dev_set_drvdata(&sch->dev, NULL);
- if (private->cmd_region)
- kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
- if (private->io_region)
- kmem_cache_free(vfio_ccw_io_region, private->io_region);
+ vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
return ret;
@@ -193,15 +229,20 @@ static int vfio_ccw_sch_probe(struct subchannel *sch)
static int vfio_ccw_sch_remove(struct subchannel *sch)
{
struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
+ struct vfio_ccw_crw *crw, *temp;
vfio_ccw_sch_quiesce(sch);
+ list_for_each_entry_safe(crw, temp, &private->crw, next) {
+ list_del(&crw->next);
+ kfree(crw);
+ }
+
vfio_ccw_mdev_unreg(sch);
dev_set_drvdata(&sch->dev, NULL);
- kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region);
- kmem_cache_free(vfio_ccw_io_region, private->io_region);
+ vfio_ccw_free_regions(private);
kfree(private->cp.guest_cp);
kfree(private);
@@ -258,6 +299,83 @@ static int vfio_ccw_sch_event(struct subchannel *sch, int process)
return rc;
}
+static void vfio_ccw_queue_crw(struct vfio_ccw_private *private,
+ unsigned int rsc,
+ unsigned int erc,
+ unsigned int rsid)
+{
+ struct vfio_ccw_crw *crw;
+
+ /*
+ * If unable to allocate a CRW, just drop the event and
+ * carry on. The guest will either see a later one or
+ * learn when it issues its own store subchannel.
+ */
+ crw = kzalloc(sizeof(*crw), GFP_ATOMIC);
+ if (!crw)
+ return;
+
+ /*
+ * Build the CRW based on the inputs given to us.
+ */
+ crw->crw.rsc = rsc;
+ crw->crw.erc = erc;
+ crw->crw.rsid = rsid;
+
+ list_add_tail(&crw->next, &private->crw);
+ queue_work(vfio_ccw_work_q, &private->crw_work);
+}
+
+static int vfio_ccw_chp_event(struct subchannel *sch,
+ struct chp_link *link, int event)
+{
+ struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
+ int mask = chp_ssd_get_mask(&sch->ssd_info, link);
+ int retry = 255;
+
+ if (!private || !mask)
+ return 0;
+
+ trace_vfio_ccw_chp_event(private->sch->schid, mask, event);
+ VFIO_CCW_MSG_EVENT(2, "%pUl (%x.%x.%04x): mask=0x%x event=%d\n",
+ mdev_uuid(private->mdev), sch->schid.cssid,
+ sch->schid.ssid, sch->schid.sch_no,
+ mask, event);
+
+ if (cio_update_schib(sch))
+ return -ENODEV;
+
+ switch (event) {
+ case CHP_VARY_OFF:
+ /* Path logically turned off */
+ sch->opm &= ~mask;
+ sch->lpm &= ~mask;
+ if (sch->schib.pmcw.lpum & mask)
+ cio_cancel_halt_clear(sch, &retry);
+ break;
+ case CHP_OFFLINE:
+ /* Path is gone */
+ if (sch->schib.pmcw.lpum & mask)
+ cio_cancel_halt_clear(sch, &retry);
+ vfio_ccw_queue_crw(private, CRW_RSC_CPATH, CRW_ERC_PERRN,
+ link->chpid.id);
+ break;
+ case CHP_VARY_ON:
+ /* Path logically turned on */
+ sch->opm |= mask;
+ sch->lpm |= mask;
+ break;
+ case CHP_ONLINE:
+ /* Path became available */
+ sch->lpm |= mask & sch->opm;
+ vfio_ccw_queue_crw(private, CRW_RSC_CPATH, CRW_ERC_INIT,
+ link->chpid.id);
+ break;
+ }
+
+ return 0;
+}
+
static struct css_device_id vfio_ccw_sch_ids[] = {
{ .match_flags = 0x1, .type = SUBCHANNEL_TYPE_IO, },
{ /* end of list */ },
@@ -275,6 +393,7 @@ static struct css_driver vfio_ccw_sch_driver = {
.remove = vfio_ccw_sch_remove,
.shutdown = vfio_ccw_sch_shutdown,
.sch_event = vfio_ccw_sch_event,
+ .chp_event = vfio_ccw_chp_event,
};
static int __init vfio_ccw_debug_init(void)
@@ -304,6 +423,14 @@ static void vfio_ccw_debug_exit(void)
debug_unregister(vfio_ccw_debug_trace_id);
}
+static void vfio_ccw_destroy_regions(void)
+{
+ kmem_cache_destroy(vfio_ccw_crw_region);
+ kmem_cache_destroy(vfio_ccw_schib_region);
+ kmem_cache_destroy(vfio_ccw_cmd_region);
+ kmem_cache_destroy(vfio_ccw_io_region);
+}
+
static int __init vfio_ccw_sch_init(void)
{
int ret;
@@ -336,6 +463,26 @@ static int __init vfio_ccw_sch_init(void)
goto out_err;
}
+ vfio_ccw_schib_region = kmem_cache_create_usercopy("vfio_ccw_schib_region",
+ sizeof(struct ccw_schib_region), 0,
+ SLAB_ACCOUNT, 0,
+ sizeof(struct ccw_schib_region), NULL);
+
+ if (!vfio_ccw_schib_region) {
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
+ vfio_ccw_crw_region = kmem_cache_create_usercopy("vfio_ccw_crw_region",
+ sizeof(struct ccw_crw_region), 0,
+ SLAB_ACCOUNT, 0,
+ sizeof(struct ccw_crw_region), NULL);
+
+ if (!vfio_ccw_crw_region) {
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
isc_register(VFIO_CCW_ISC);
ret = css_driver_register(&vfio_ccw_sch_driver);
if (ret) {
@@ -346,8 +493,7 @@ static int __init vfio_ccw_sch_init(void)
return ret;
out_err:
- kmem_cache_destroy(vfio_ccw_cmd_region);
- kmem_cache_destroy(vfio_ccw_io_region);
+ vfio_ccw_destroy_regions();
destroy_workqueue(vfio_ccw_work_q);
vfio_ccw_debug_exit();
return ret;
@@ -357,8 +503,7 @@ static void __exit vfio_ccw_sch_exit(void)
{
css_driver_unregister(&vfio_ccw_sch_driver);
isc_unregister(VFIO_CCW_ISC);
- kmem_cache_destroy(vfio_ccw_io_region);
- kmem_cache_destroy(vfio_ccw_cmd_region);
+ vfio_ccw_destroy_regions();
destroy_workqueue(vfio_ccw_work_q);
vfio_ccw_debug_exit();
}
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c
index f0d71ab77c50..8b3ed5b45277 100644
--- a/drivers/s390/cio/vfio_ccw_ops.c
+++ b/drivers/s390/cio/vfio_ccw_ops.c
@@ -172,8 +172,22 @@ static int vfio_ccw_mdev_open(struct mdev_device *mdev)
ret = vfio_ccw_register_async_dev_regions(private);
if (ret)
- vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
- &private->nb);
+ goto out_unregister;
+
+ ret = vfio_ccw_register_schib_dev_regions(private);
+ if (ret)
+ goto out_unregister;
+
+ ret = vfio_ccw_register_crw_dev_regions(private);
+ if (ret)
+ goto out_unregister;
+
+ return ret;
+
+out_unregister:
+ vfio_ccw_unregister_dev_regions(private);
+ vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
+ &private->nb);
return ret;
}
@@ -181,7 +195,6 @@ static void vfio_ccw_mdev_release(struct mdev_device *mdev)
{
struct vfio_ccw_private *private =
dev_get_drvdata(mdev_parent_dev(mdev));
- int i;
if ((private->state != VFIO_CCW_STATE_NOT_OPER) &&
(private->state != VFIO_CCW_STATE_STANDBY)) {
@@ -191,15 +204,9 @@ static void vfio_ccw_mdev_release(struct mdev_device *mdev)
}
cp_free(&private->cp);
+ vfio_ccw_unregister_dev_regions(private);
vfio_unregister_notifier(mdev_dev(mdev), VFIO_IOMMU_NOTIFY,
&private->nb);
-
- for (i = 0; i < private->num_regions; i++)
- private->region[i].ops->release(private, &private->region[i]);
-
- private->num_regions = 0;
- kfree(private->region);
- private->region = NULL;
}
static ssize_t vfio_ccw_mdev_read_io_region(struct vfio_ccw_private *private,
@@ -384,17 +391,22 @@ static int vfio_ccw_mdev_get_region_info(struct vfio_region_info *info,
static int vfio_ccw_mdev_get_irq_info(struct vfio_irq_info *info)
{
- if (info->index != VFIO_CCW_IO_IRQ_INDEX)
+ switch (info->index) {
+ case VFIO_CCW_IO_IRQ_INDEX:
+ case VFIO_CCW_CRW_IRQ_INDEX:
+ info->count = 1;
+ info->flags = VFIO_IRQ_INFO_EVENTFD;
+ break;
+ default:
return -EINVAL;
-
- info->count = 1;
- info->flags = VFIO_IRQ_INFO_EVENTFD;
+ }
return 0;
}
static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev,
uint32_t flags,
+ uint32_t index,
void __user *data)
{
struct vfio_ccw_private *private;
@@ -404,7 +416,17 @@ static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev,
return -EINVAL;
private = dev_get_drvdata(mdev_parent_dev(mdev));
- ctx = &private->io_trigger;
+
+ switch (index) {
+ case VFIO_CCW_IO_IRQ_INDEX:
+ ctx = &private->io_trigger;
+ break;
+ case VFIO_CCW_CRW_IRQ_INDEX:
+ ctx = &private->crw_trigger;
+ break;
+ default:
+ return -EINVAL;
+ }
switch (flags & VFIO_IRQ_SET_DATA_TYPE_MASK) {
case VFIO_IRQ_SET_DATA_NONE:
@@ -482,6 +504,17 @@ int vfio_ccw_register_dev_region(struct vfio_ccw_private *private,
return 0;
}
+void vfio_ccw_unregister_dev_regions(struct vfio_ccw_private *private)
+{
+ int i;
+
+ for (i = 0; i < private->num_regions; i++)
+ private->region[i].ops->release(private, &private->region[i]);
+ private->num_regions = 0;
+ kfree(private->region);
+ private->region = NULL;
+}
+
static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
unsigned int cmd,
unsigned long arg)
@@ -565,7 +598,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
return ret;
data = (void __user *)(arg + minsz);
- return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, data);
+ return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, hdr.index, data);
}
case VFIO_DEVICE_RESET:
return vfio_ccw_mdev_reset(mdev);
diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h
index 9b9bb4982972..8723156b29ea 100644
--- a/drivers/s390/cio/vfio_ccw_private.h
+++ b/drivers/s390/cio/vfio_ccw_private.h
@@ -17,6 +17,7 @@
#include <linux/eventfd.h>
#include <linux/workqueue.h>
#include <linux/vfio_ccw.h>
+#include <asm/crw.h>
#include <asm/debug.h>
#include "css.h"
@@ -53,8 +54,16 @@ int vfio_ccw_register_dev_region(struct vfio_ccw_private *private,
unsigned int subtype,
const struct vfio_ccw_regops *ops,
size_t size, u32 flags, void *data);
+void vfio_ccw_unregister_dev_regions(struct vfio_ccw_private *private);
int vfio_ccw_register_async_dev_regions(struct vfio_ccw_private *private);
+int vfio_ccw_register_schib_dev_regions(struct vfio_ccw_private *private);
+int vfio_ccw_register_crw_dev_regions(struct vfio_ccw_private *private);
+
+struct vfio_ccw_crw {
+ struct list_head next;
+ struct crw crw;
+};
/**
* struct vfio_ccw_private
@@ -68,6 +77,8 @@ int vfio_ccw_register_async_dev_regions(struct vfio_ccw_private *private);
* @io_mutex: protect against concurrent update of I/O regions
* @region: additional regions for other subchannel operations
* @cmd_region: MMIO region for asynchronous I/O commands other than START
+ * @schib_region: MMIO region for SCHIB information
+ * @crw_region: MMIO region for getting channel report words
* @num_regions: number of additional regions
* @cp: channel program for the current I/O operation
* @irb: irb info received from interrupt
@@ -86,14 +97,19 @@ struct vfio_ccw_private {
struct mutex io_mutex;
struct vfio_ccw_region *region;
struct ccw_cmd_region *cmd_region;
+ struct ccw_schib_region *schib_region;
+ struct ccw_crw_region *crw_region;
int num_regions;
struct channel_program cp;
struct irb irb;
union scsw scsw;
+ struct list_head crw;
struct eventfd_ctx *io_trigger;
+ struct eventfd_ctx *crw_trigger;
struct work_struct io_work;
+ struct work_struct crw_work;
} __aligned(8);
extern int vfio_ccw_mdev_reg(struct subchannel *sch);
diff --git a/drivers/s390/cio/vfio_ccw_trace.c b/drivers/s390/cio/vfio_ccw_trace.c
index 8c671d2519f6..4a0205905afc 100644
--- a/drivers/s390/cio/vfio_ccw_trace.c
+++ b/drivers/s390/cio/vfio_ccw_trace.c
@@ -9,6 +9,7 @@
#define CREATE_TRACE_POINTS
#include "vfio_ccw_trace.h"
+EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_chp_event);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_async_request);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_event);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_io_request);
diff --git a/drivers/s390/cio/vfio_ccw_trace.h b/drivers/s390/cio/vfio_ccw_trace.h
index f5d31887d413..62fb30598d47 100644
--- a/drivers/s390/cio/vfio_ccw_trace.h
+++ b/drivers/s390/cio/vfio_ccw_trace.h
@@ -17,6 +17,36 @@
#include <linux/tracepoint.h>
+TRACE_EVENT(vfio_ccw_chp_event,
+ TP_PROTO(struct subchannel_id schid,
+ int mask,
+ int event),
+ TP_ARGS(schid, mask, event),
+
+ TP_STRUCT__entry(
+ __field(u8, cssid)
+ __field(u8, ssid)
+ __field(u16, sch_no)
+ __field(int, mask)
+ __field(int, event)
+ ),
+
+ TP_fast_assign(
+ __entry->cssid = schid.cssid;
+ __entry->ssid = schid.ssid;
+ __entry->sch_no = schid.sch_no;
+ __entry->mask = mask;
+ __entry->event = event;
+ ),
+
+ TP_printk("schid=%x.%x.%04x mask=0x%x event=%d",
+ __entry->cssid,
+ __entry->ssid,
+ __entry->sch_no,
+ __entry->mask,
+ __entry->event)
+);
+
TRACE_EVENT(vfio_ccw_fsm_async_request,
TP_PROTO(struct subchannel_id schid,
int command,
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 35064443e748..e71ca4a719a5 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -62,8 +62,10 @@ MODULE_PARM_DESC(aqmask, "AP bus domain mask.");
static struct device *ap_root_device;
-DEFINE_SPINLOCK(ap_list_lock);
-LIST_HEAD(ap_card_list);
+/* Hashtable of all queue devices on the AP bus */
+DEFINE_HASHTABLE(ap_queues, 8);
+/* lock used for the ap_queues hashtable */
+DEFINE_SPINLOCK(ap_queues_lock);
/* Default permissions (ioctl, card and domain masking) */
struct ap_perms ap_perms;
@@ -414,7 +416,7 @@ static void ap_interrupt_handler(struct airq_struct *airq, bool floating)
*/
static void ap_tasklet_fn(unsigned long dummy)
{
- struct ap_card *ac;
+ int bkt;
struct ap_queue *aq;
enum ap_wait wait = AP_WAIT_NONE;
@@ -425,34 +427,30 @@ static void ap_tasklet_fn(unsigned long dummy)
if (ap_using_interrupts())
xchg(ap_airq.lsi_ptr, 0);
- spin_lock_bh(&ap_list_lock);
- for_each_ap_card(ac) {
- for_each_ap_queue(aq, ac) {
- spin_lock_bh(&aq->lock);
- wait = min(wait, ap_sm_event_loop(aq, AP_EVENT_POLL));
- spin_unlock_bh(&aq->lock);
- }
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ spin_lock_bh(&aq->lock);
+ wait = min(wait, ap_sm_event_loop(aq, AP_EVENT_POLL));
+ spin_unlock_bh(&aq->lock);
}
- spin_unlock_bh(&ap_list_lock);
+ spin_unlock_bh(&ap_queues_lock);
ap_wait(wait);
}
static int ap_pending_requests(void)
{
- struct ap_card *ac;
+ int bkt;
struct ap_queue *aq;
- spin_lock_bh(&ap_list_lock);
- for_each_ap_card(ac) {
- for_each_ap_queue(aq, ac) {
- if (aq->queue_count == 0)
- continue;
- spin_unlock_bh(&ap_list_lock);
- return 1;
- }
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ if (aq->queue_count == 0)
+ continue;
+ spin_unlock_bh(&ap_queues_lock);
+ return 1;
}
- spin_unlock_bh(&ap_list_lock);
+ spin_unlock_bh(&ap_queues_lock);
return 0;
}
@@ -683,24 +681,20 @@ static int ap_device_probe(struct device *dev)
}
/* Add queue/card to list of active queues/cards */
- spin_lock_bh(&ap_list_lock);
- if (is_card_dev(dev))
- list_add(&to_ap_card(dev)->list, &ap_card_list);
- else
- list_add(&to_ap_queue(dev)->list,
- &to_ap_queue(dev)->card->queues);
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_add(ap_queues, &to_ap_queue(dev)->hnode,
+ to_ap_queue(dev)->qid);
+ spin_unlock_bh(&ap_queues_lock);
ap_dev->drv = ap_drv;
rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
if (rc) {
- spin_lock_bh(&ap_list_lock);
- if (is_card_dev(dev))
- list_del_init(&to_ap_card(dev)->list);
- else
- list_del_init(&to_ap_queue(dev)->list);
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_del(&to_ap_queue(dev)->hnode);
+ spin_unlock_bh(&ap_queues_lock);
ap_dev->drv = NULL;
}
@@ -725,16 +719,33 @@ static int ap_device_remove(struct device *dev)
ap_queue_remove(to_ap_queue(dev));
/* Remove queue/card from list of active queues/cards */
- spin_lock_bh(&ap_list_lock);
- if (is_card_dev(dev))
- list_del_init(&to_ap_card(dev)->list);
- else
- list_del_init(&to_ap_queue(dev)->list);
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_del(&to_ap_queue(dev)->hnode);
+ spin_unlock_bh(&ap_queues_lock);
return 0;
}
+struct ap_queue *ap_get_qdev(ap_qid_t qid)
+{
+ int bkt;
+ struct ap_queue *aq;
+
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ if (aq->qid == qid) {
+ get_device(&aq->ap_dev.device);
+ spin_unlock_bh(&ap_queues_lock);
+ return aq;
+ }
+ }
+ spin_unlock_bh(&ap_queues_lock);
+
+ return NULL;
+}
+EXPORT_SYMBOL(ap_get_qdev);
+
int ap_driver_register(struct ap_driver *ap_drv, struct module *owner,
char *name)
{
@@ -1506,6 +1517,9 @@ static int __init ap_module_init(void)
return -ENODEV;
}
+ /* init ap_queue hashtable */
+ hash_init(ap_queues);
+
/* set up the AP permissions (ioctls, ap and aq masks) */
ap_perms_init();
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 8e8e37b6c0ee..053cc34d2ca2 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -15,6 +15,7 @@
#include <linux/device.h>
#include <linux/types.h>
+#include <linux/hashtable.h>
#include <asm/isc.h>
#include <asm/ap.h>
@@ -27,8 +28,8 @@
extern int ap_domain_index;
-extern spinlock_t ap_list_lock;
-extern struct list_head ap_card_list;
+extern DECLARE_HASHTABLE(ap_queues, 8);
+extern spinlock_t ap_queues_lock;
static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
{
@@ -152,8 +153,6 @@ struct ap_device {
struct ap_card {
struct ap_device ap_dev;
- struct list_head list; /* Private list of AP cards. */
- struct list_head queues; /* List of assoc. AP queues */
void *private; /* ap driver private pointer. */
int raw_hwtype; /* AP raw hardware type. */
unsigned int functions; /* AP device function bitfield. */
@@ -166,7 +165,7 @@ struct ap_card {
struct ap_queue {
struct ap_device ap_dev;
- struct list_head list; /* Private list of AP queues. */
+ struct hlist_node hnode; /* Node for the ap_queues hashtable */
struct ap_card *card; /* Ptr to assoc. AP card. */
spinlock_t lock; /* Per device lock. */
void *private; /* ap driver private pointer. */
@@ -223,12 +222,6 @@ static inline void ap_release_message(struct ap_message *ap_msg)
kzfree(ap_msg->private);
}
-#define for_each_ap_card(_ac) \
- list_for_each_entry(_ac, &ap_card_list, list)
-
-#define for_each_ap_queue(_aq, _ac) \
- list_for_each_entry(_aq, &(_ac)->queues, list)
-
/*
* Note: don't use ap_send/ap_recv after using ap_queue_message
* for the first time. Otherwise the ap message queue will get
@@ -269,6 +262,16 @@ struct ap_perms {
extern struct ap_perms ap_perms;
extern struct mutex ap_perms_mutex;
+/*
+ * Get ap_queue device for this qid.
+ * Returns ptr to the struct ap_queue device or NULL if there
+ * was no ap_queue device with this qid found. When something is
+ * found, the reference count of the embedded device is increased.
+ * So the caller has to decrease the reference count after use
+ * with a call to put_device(&aq->ap_dev.device).
+ */
+struct ap_queue *ap_get_qdev(ap_qid_t qid);
+
/*
* check APQN for owned/reserved by ap bus and default driver(s).
* Checks if this APQN is or will be in use by the ap bus
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index 0a39dfdb6a1d..6588713319ba 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -66,9 +66,9 @@ static ssize_t request_count_show(struct device *dev,
u64 req_cnt;
req_cnt = 0;
- spin_lock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
req_cnt = atomic64_read(&ac->total_request_count);
- spin_unlock_bh(&ap_list_lock);
+ spin_unlock_bh(&ap_queues_lock);
return scnprintf(buf, PAGE_SIZE, "%llu\n", req_cnt);
}
@@ -76,13 +76,15 @@ static ssize_t request_count_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ap_card *ac = to_ap_card(dev);
+ int bkt;
struct ap_queue *aq;
+ struct ap_card *ac = to_ap_card(dev);
- spin_lock_bh(&ap_list_lock);
- for_each_ap_queue(aq, ac)
- aq->total_request_count = 0;
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode)
+ if (ac == aq->card)
+ aq->total_request_count = 0;
+ spin_unlock_bh(&ap_queues_lock);
atomic64_set(&ac->total_request_count, 0);
return count;
@@ -93,15 +95,17 @@ static DEVICE_ATTR_RW(request_count);
static ssize_t requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct ap_card *ac = to_ap_card(dev);
+ int bkt;
struct ap_queue *aq;
unsigned int reqq_cnt;
+ struct ap_card *ac = to_ap_card(dev);
reqq_cnt = 0;
- spin_lock_bh(&ap_list_lock);
- for_each_ap_queue(aq, ac)
- reqq_cnt += aq->requestq_count;
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode)
+ if (ac == aq->card)
+ reqq_cnt += aq->requestq_count;
+ spin_unlock_bh(&ap_queues_lock);
return scnprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt);
}
@@ -110,15 +114,17 @@ static DEVICE_ATTR_RO(requestq_count);
static ssize_t pendingq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct ap_card *ac = to_ap_card(dev);
+ int bkt;
struct ap_queue *aq;
unsigned int penq_cnt;
+ struct ap_card *ac = to_ap_card(dev);
penq_cnt = 0;
- spin_lock_bh(&ap_list_lock);
- for_each_ap_queue(aq, ac)
- penq_cnt += aq->pendingq_count;
- spin_unlock_bh(&ap_list_lock);
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode)
+ if (ac == aq->card)
+ penq_cnt += aq->pendingq_count;
+ spin_unlock_bh(&ap_queues_lock);
return scnprintf(buf, PAGE_SIZE, "%d\n", penq_cnt);
}
@@ -163,11 +169,6 @@ static void ap_card_device_release(struct device *dev)
{
struct ap_card *ac = to_ap_card(dev);
- if (!list_empty(&ac->list)) {
- spin_lock_bh(&ap_list_lock);
- list_del_init(&ac->list);
- spin_unlock_bh(&ap_list_lock);
- }
kfree(ac);
}
@@ -179,8 +180,6 @@ struct ap_card *ap_card_create(int id, int queue_depth, int raw_type,
ac = kzalloc(sizeof(*ac), GFP_KERNEL);
if (!ac)
return NULL;
- INIT_LIST_HEAD(&ac->list);
- INIT_LIST_HEAD(&ac->queues);
ac->ap_dev.device.release = ap_card_device_release;
ac->ap_dev.device.type = &ap_card_type;
ac->ap_dev.device_type = comp_type;
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 0eaf1d04e8df..73b077dca3e6 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -568,11 +568,10 @@ static void ap_queue_device_release(struct device *dev)
{
struct ap_queue *aq = to_ap_queue(dev);
- if (!list_empty(&aq->list)) {
- spin_lock_bh(&ap_list_lock);
- list_del_init(&aq->list);
- spin_unlock_bh(&ap_list_lock);
- }
+ spin_lock_bh(&ap_queues_lock);
+ hash_del(&aq->hnode);
+ spin_unlock_bh(&ap_queues_lock);
+
kfree(aq);
}
@@ -590,7 +589,6 @@ struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type)
aq->state = AP_STATE_UNBOUND;
aq->interrupt = AP_INTR_DISABLED;
spin_lock_init(&aq->lock);
- INIT_LIST_HEAD(&aq->list);
INIT_LIST_HEAD(&aq->pendingq);
INIT_LIST_HEAD(&aq->requestq);
timer_setup(&aq->timeout, ap_request_timeout, 0);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 0bd5b09e7a22..f60b865c73ad 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -20,6 +20,7 @@
#include <linux/list.h>
#include <linux/hash.h>
#include <linux/hashtable.h>
+#include <asm/chsc.h>
#include <asm/setup.h>
#include "qeth_core.h"
#include "qeth_l2.h"
@@ -27,8 +28,8 @@
static void qeth_bridgeport_query_support(struct qeth_card *card);
static void qeth_bridge_state_change(struct qeth_card *card,
struct qeth_ipa_cmd *cmd);
-static void qeth_bridge_host_event(struct qeth_card *card,
- struct qeth_ipa_cmd *cmd);
+static void qeth_addr_change_event(struct qeth_card *card,
+ struct qeth_ipa_cmd *cmd);
static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
static void qeth_l2_vnicc_init(struct qeth_card *card);
static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
@@ -628,6 +629,72 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
schedule_work(&card->rx_mode_work);
}
+/**
+ * qeth_l2_pnso() - perform network subchannel operation
+ * @card: qeth_card structure pointer
+ * @cnc: Boolean Change-Notification Control
+ * @cb: Callback function will be executed for each element
+ * of the address list
+ * @priv: Pointer to pass to the callback function.
+ *
+ * Collects network information in a network address list and calls the
+ * callback function for every entry in the list. If "change-notification-
+ * control" is set, further changes in the address list will be reported
+ * via the IPA command.
+ */
+static int qeth_l2_pnso(struct qeth_card *card, int cnc,
+ void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
+ void *priv)
+{
+ struct ccw_device *ddev = CARD_DDEV(card);
+ struct chsc_pnso_area *rr;
+ u32 prev_instance = 0;
+ int isfirstblock = 1;
+ int i, size, elems;
+ int rc;
+
+ QETH_CARD_TEXT(card, 2, "PNSO");
+ rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
+ if (rr == NULL)
+ return -ENOMEM;
+ do {
+ /* on the first iteration, naihdr.resume_token will be zero */
+ rc = ccw_device_pnso(ddev, rr, rr->naihdr.resume_token, cnc);
+ if (rc)
+ continue;
+ if (cb == NULL)
+ continue;
+
+ size = rr->naihdr.naids;
+ if (size != sizeof(struct chsc_pnso_naid_l2)) {
+ WARN_ON_ONCE(1);
+ continue;
+ }
+
+ elems = (rr->response.length - sizeof(struct chsc_header) -
+ sizeof(struct chsc_pnso_naihdr)) / size;
+
+ if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
+ /* Inform the caller that they need to scrap */
+ /* the data that was already reported via cb */
+ rc = -EAGAIN;
+ break;
+ }
+ isfirstblock = 0;
+ prev_instance = rr->naihdr.instance;
+ for (i = 0; i < elems; i++)
+ (*cb)(priv, &rr->entries[i]);
+ } while ((rc == -EBUSY) || (!rc && /* list stored */
+ /* resume token is non-zero => list incomplete */
+ (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
+
+ if (rc)
+ QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
+
+ free_page((unsigned long)rr);
+ return rc;
+}
+
static const struct net_device_ops qeth_l2_netdev_ops = {
.ndo_open = qeth_open,
.ndo_stop = qeth_stop,
@@ -854,7 +921,7 @@ static int qeth_l2_control_event(struct qeth_card *card,
} else
return 1;
case IPA_CMD_ADDRESS_CHANGE_NOTIF:
- qeth_bridge_host_event(card, cmd);
+ qeth_addr_change_event(card, cmd);
return 0;
default:
return 1;
@@ -971,8 +1038,10 @@ enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
* for all currently registered addresses.
*/
static void qeth_bridge_emit_host_event(struct qeth_card *card,
- enum qeth_an_event_type evtype,
- u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
+ enum qeth_an_event_type evtype,
+ u8 code,
+ struct net_if_token *token,
+ struct mac_addr_lnid *addr_lnid)
{
char str[7][32];
char *env[8];
@@ -1089,74 +1158,76 @@ static void qeth_bridge_state_change(struct qeth_card *card,
queue_work(card->event_wq, &data->worker);
}
-struct qeth_bridge_host_data {
+struct qeth_addr_change_data {
struct work_struct worker;
struct qeth_card *card;
- struct qeth_ipacmd_addr_change hostevs;
+ struct qeth_ipacmd_addr_change ac_event;
};
-static void qeth_bridge_host_event_worker(struct work_struct *work)
+static void qeth_addr_change_event_worker(struct work_struct *work)
{
- struct qeth_bridge_host_data *data =
- container_of(work, struct qeth_bridge_host_data, worker);
+ struct qeth_addr_change_data *data =
+ container_of(work, struct qeth_addr_change_data, worker);
int i;
- if (data->hostevs.lost_event_mask) {
+ QETH_CARD_TEXT(data->card, 4, "adrchgew");
+ if (data->ac_event.lost_event_mask) {
dev_info(&data->card->gdev->dev,
-"Address notification from the Bridge Port stopped %s (%s)\n",
- data->card->dev->name,
- (data->hostevs.lost_event_mask == 0x01)
+ "Address change notification stopped on %s (%s)\n",
+ data->card->dev->name,
+ (data->ac_event.lost_event_mask == 0x01)
? "Overflow"
- : (data->hostevs.lost_event_mask == 0x02)
+ : (data->ac_event.lost_event_mask == 0x02)
? "Bridge port state change"
: "Unknown reason");
mutex_lock(&data->card->sbp_lock);
data->card->options.sbp.hostnotification = 0;
mutex_unlock(&data->card->sbp_lock);
qeth_bridge_emit_host_event(data->card, anev_abort,
- 0, NULL, NULL);
+ 0, NULL, NULL);
} else
- for (i = 0; i < data->hostevs.num_entries; i++) {
+ for (i = 0; i < data->ac_event.num_entries; i++) {
struct qeth_ipacmd_addr_change_entry *entry =
- &data->hostevs.entry[i];
+ &data->ac_event.entry[i];
qeth_bridge_emit_host_event(data->card,
- anev_reg_unreg,
- entry->change_code,
- &entry->token, &entry->addr_lnid);
+ anev_reg_unreg,
+ entry->change_code,
+ &entry->token,
+ &entry->addr_lnid);
}
kfree(data);
}
-static void qeth_bridge_host_event(struct qeth_card *card,
- struct qeth_ipa_cmd *cmd)
+static void qeth_addr_change_event(struct qeth_card *card,
+ struct qeth_ipa_cmd *cmd)
{
struct qeth_ipacmd_addr_change *hostevs =
&cmd->data.addrchange;
- struct qeth_bridge_host_data *data;
+ struct qeth_addr_change_data *data;
int extrasize;
- QETH_CARD_TEXT(card, 2, "brhostev");
+ QETH_CARD_TEXT(card, 4, "adrchgev");
if (cmd->hdr.return_code != 0x0000) {
if (cmd->hdr.return_code == 0x0010) {
if (hostevs->lost_event_mask == 0x00)
hostevs->lost_event_mask = 0xff;
} else {
- QETH_CARD_TEXT_(card, 2, "BPHe%04x",
+ QETH_CARD_TEXT_(card, 2, "ACHN%04x",
cmd->hdr.return_code);
return;
}
}
extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
hostevs->num_entries;
- data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
- GFP_ATOMIC);
+ data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
+ GFP_ATOMIC);
if (!data) {
- QETH_CARD_TEXT(card, 2, "BPHalloc");
+ QETH_CARD_TEXT(card, 2, "ACNalloc");
return;
}
- INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
+ INIT_WORK(&data->worker, qeth_addr_change_event_worker);
data->card = card;
- memcpy(&data->hostevs, hostevs,
+ memcpy(&data->ac_event, hostevs,
sizeof(struct qeth_ipacmd_addr_change) + extrasize);
queue_work(card->event_wq, &data->worker);
}
@@ -1446,63 +1517,18 @@ int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
}
-/**
- * qeth_anset_makerc() - derive "traditional" error from hardware codes.
- * @card: qeth_card structure pointer, for debug messages.
- *
- * Returns negative errno-compatible error indication or 0 on success.
- */
-static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
-{
- int rc;
-
- if (pnso_rc == 0)
- switch (response) {
- case 0x0001:
- rc = 0;
- break;
- case 0x0004:
- case 0x0100:
- case 0x0106:
- rc = -EOPNOTSUPP;
- dev_err(&card->gdev->dev,
- "Setting address notification failed\n");
- break;
- case 0x0107:
- rc = -EAGAIN;
- break;
- default:
- rc = -EIO;
- }
- else
- rc = -EIO;
-
- if (rc) {
- QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
- QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
- }
- return rc;
-}
-
static void qeth_bridgeport_an_set_cb(void *priv,
- enum qdio_brinfo_entry_type type, void *entry)
+ struct chsc_pnso_naid_l2 *entry)
{
struct qeth_card *card = (struct qeth_card *)priv;
- struct qdio_brinfo_entry_l2 *l2entry;
u8 code;
- if (type != l2_addr_lnid) {
- WARN_ON_ONCE(1);
- return;
- }
-
- l2entry = (struct qdio_brinfo_entry_l2 *)entry;
code = IPA_ADDR_CHANGE_CODE_MACADDR;
- if (l2entry->addr_lnid.lnid < VLAN_N_VID)
+ if (entry->addr_lnid.lnid < VLAN_N_VID)
code |= IPA_ADDR_CHANGE_CODE_VLANID;
qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
- (struct net_if_token *)&l2entry->nit,
- (struct mac_addr_lnid *)&l2entry->addr_lnid);
+ (struct net_if_token *)&entry->nit,
+ (struct mac_addr_lnid *)&entry->addr_lnid);
}
/**
@@ -1518,22 +1544,16 @@ static void qeth_bridgeport_an_set_cb(void *priv,
int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
{
int rc;
- u16 response;
- struct ccw_device *ddev;
- struct subchannel_id schid;
if (!card->options.sbp.supported_funcs)
return -EOPNOTSUPP;
- ddev = CARD_DDEV(card);
- ccw_device_get_schid(ddev, &schid);
if (enable) {
qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
- rc = qdio_pnso_brinfo(schid, 1, &response,
- qeth_bridgeport_an_set_cb, card);
+ rc = qeth_l2_pnso(card, 1, qeth_bridgeport_an_set_cb, card);
} else
- rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
- return qeth_anset_makerc(card, rc, response);
+ rc = qeth_l2_pnso(card, 0, NULL, NULL);
+ return rc;
}
static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 83ce1cdf5676..93a063a7d7f9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2048,6 +2048,8 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
+
+int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
int pci_iov_add_virtfn(struct pci_dev *dev, int id);
void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
int pci_num_vf(struct pci_dev *dev);
@@ -2073,6 +2075,12 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
}
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{ return -ENODEV; }
+
+static inline int pci_iov_sysfs_link(struct pci_dev *dev,
+ struct pci_dev *virtfn, int id)
+{
+ return -ENODEV;
+}
static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
{
return -ENOSYS;
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 015516bcfaa3..907758cf6d60 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -378,6 +378,8 @@ struct vfio_region_gfx_edid {
/* sub-types for VFIO_REGION_TYPE_CCW */
#define VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD (1)
+#define VFIO_REGION_SUBTYPE_CCW_SCHIB (2)
+#define VFIO_REGION_SUBTYPE_CCW_CRW (3)
/*
* The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
@@ -577,6 +579,7 @@ enum {
enum {
VFIO_CCW_IO_IRQ_INDEX,
+ VFIO_CCW_CRW_IRQ_INDEX,
VFIO_CCW_NUM_IRQS
};
diff --git a/include/uapi/linux/vfio_ccw.h b/include/uapi/linux/vfio_ccw.h
index cbecbf0cd54f..aa04f3aa6db0 100644
--- a/include/uapi/linux/vfio_ccw.h
+++ b/include/uapi/linux/vfio_ccw.h
@@ -34,4 +34,23 @@ struct ccw_cmd_region {
__u32 ret_code;
} __packed;
+/*
+ * Used for processing commands that read the subchannel-information block
+ * Reading this region triggers a stsch() to hardware
+ * Note: this is controlled by a capability
+ */
+struct ccw_schib_region {
+#define SCHIB_AREA_SIZE 52
+ __u8 schib_area[SCHIB_AREA_SIZE];
+} __packed;
+
+/*
+ * Used for returning a Channel Report Word to userspace.
+ * Note: this is controlled by a capability
+ */
+struct ccw_crw_region {
+ __u32 crw;
+ __u32 pad;
+} __packed;
+
#endif
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