mainline inclusion
from mainline-v5.15
commit 6cfd9e62
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 6cfd9e62 dmaengine: idxd: assign MSIX vectors to each WQ rather than roundrobin.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

Deviation from upstream:
Merge commit da435aed dmaengine: idxd: fix array index when int_handles are being used.

--------------------------------

IOPS increased when changing MSIX vector to per WQ from roundrobin.
Allows descriptor to be completed by the submitter improves caching
locality.
Suggested-by: NKonstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Acked-by: NKonstantin Ananyev <konstantin.ananyev@intel.com>
Link: https://lore.kernel.org/r/162456717326.1130457.15258077196523268356.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.14
commit da435aed
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit da435aed dmaengine: idxd: fix array index when int_handles are being used.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The index to the irq vector should be local and has no relation to
the assigned interrupt handle. Assign the MSIX interrupt index that is
programmed for the descriptor. The interrupt handle only matters when it
comes to hardware descriptor programming.

Fixes: eb15e715 ("dmaengine: idxd: add interrupt handle request and release support")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162456176939.1121476.3366256009925001897.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.14
commit 8ba89a3c
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 8ba89a3c dmaengine: idxd: fix desc->vector that isn't being updated.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Missing update for desc->vector when the wq vector gets updated. This
causes the desc->vector to always be at 0.

Fixes: da435aed ("dmaengine: idxd: fix array index when int_handles are being used")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162628784374.353761.4736602409627820431.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.15
commit ac24a2dc
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit ac24a2dc dmaengine: idxd: add missing percpu ref put on failure.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

When enqcmds() fails, exit path is missing a percpu_ref_put(). This can
cause failure on shutdown path when the driver is attempting to quiesce the
wq. Add missing percpu_ref_put() call on the error exit path.

Fixes: 93a40a6d ("dmaengine: idxd: add percpu_ref to descriptor submission path")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162456170168.1121236.7240941044089212312.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.14
commit 25905f60
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 25905f60 dmaengine: idxd: Change license on idxd.h to LGPL.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

This file was given GPL-2.0 license. But LGPL-2.1 makes more sense
as it needs to be used by libraries outside of the kernel source tree.
Signed-off-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.14
commit 33f9f3c3
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 33f9f3c3 dmaengine: idxd: remove devm allocation for idxd->int_handles.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Allocation of idxd->int_handles was merged incorrectly for the 5.13 merge
window. The devm_kcalloc should've been regular kcalloc due to devm_*
removal series for the driver.

Fixes: eb15e715 ("dmaengine: idxd: add interrupt handle request and release support")
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162060710518.130816.11349798049329202863.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.14
commit 58cb138e
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 58cb138e dmaengine: idxd: Remove redundant variable cdev_ctx.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Variable cdev_ctx is set to '&ictx[wq->idxd->data->type]' but this
value is not used, hence it is a redundant assignment and can be
removed.

Clean up the following clang-analyzer warning:

drivers/dma/idxd/cdev.c:300:2: warning: Value stored to 'cdev_ctx' is
never read [clang-analyzer-deadcode.DeadStores].
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NJiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/1620298847-33127-1-git-send-email-jiapeng.chong@linux.alibaba.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 99b18e88
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 99b18e88 dmaengine: idxd: Fix missing error code in idxd_cdev_open().
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The error code is missing in this code scenario, add the error code
'-EINVAL' to the return value 'rc'.

Eliminate the follow smatch warning:

drivers/dma/idxd/cdev.c:113 idxd_cdev_open() warn: missing error code
'rc'.
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NJiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/1622628446-87909-1-git-send-email-jiapeng.chong@linux.alibaba.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit ddf742d4
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit ddf742d4 dmaengine: idxd: Add missing cleanup for early error out in probe call.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The probe call stack is missing some cleanup when things fail in the
middle. Add the appropriate cleanup routines to make sure we exit
gracefully.

Fixes: a39c7cd0 ("dmaengine: idxd: removal of pcim managed mmio mapping")
Reported-by: NNikhil Rao <nikhil.rao@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162197061707.392656.15760573520817310791.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 1c4841cc
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 1c4841cc dmaengine: idxd: add engine 'struct device' missing bus type assignment.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

engine 'struct device' setup is missing assigning the bus type. Add it to
dsa_bus_type.

Fixes: 75b91130 ("dmaengine: idxd: fix engine conf_dev lifetime")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161947841562.984844.17505646725993659651.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 74b2fc88
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 74b2fc88 dmaengine: idxd: Use cpu_feature_enabled().
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

When testing x86 feature bits, use cpu_feature_enabled() so that
build-disabled features can remain off, regardless of what CPUID says.

Fixes: 8e50d392 ("dmaengine: idxd: Add shared workqueue support")
Signed-off-by: NBorislav Petkov <bp@suse.de>
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Acked-By: NVinod Koul <vkoul@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 0bde4444
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 0bde4444 dmaengine: idxd: Enable IDXD performance monitor support.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add the code needed in the main IDXD driver to interface with the IDXD
perfmon implementation.

[ Based on work originally by Jing Lin. ]
Reviewed-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NKan Liang <kan.liang@linux.intel.com>
Signed-off-by: NTom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/a5564a5583911565d31c2af9234218c5166c4b2c.1619276133.git.zanussi@kernel.orgSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 81dd4d4d
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 81dd4d4d dmaengine: idxd: Add IDXD performance monitor support.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Implement the IDXD performance monitor capability (named 'perfmon' in
the DSA (Data Streaming Accelerator) spec [1]), which supports the
collection of information about key events occurring during DSA and
IAX (Intel Analytics Accelerator) device execution, to assist in
performance tuning and debugging.

The idxd perfmon support is implemented as part of the IDXD driver and
interfaces with the Linux perf framework.  It has several features in
common with the existing uncore pmu support:

  - it does not support sampling
  - does not support per-thread counting

However it also has some unique features not present in the core and
uncore support:

  - all general-purpose counters are identical, thus no event constraints
  - operation is always system-wide

While the core perf subsystem assumes that all counters are by default
per-cpu, the uncore pmus are socket-scoped and use a cpu mask to
restrict counting to one cpu from each socket.  IDXD counters use a
similar strategy but expand the scope even further; since IDXD
counters are system-wide and can be read from any cpu, the IDXD perf
driver picks a single cpu to do the work (with cpu hotplug notifiers
to choose a different cpu if the chosen one is taken off-line).

More specifically, the perf userspace tool by default opens a counter
for each cpu for an event.  However, if it finds a cpumask file
associated with the pmu under sysfs, as is the case with the uncore
pmus, it will open counters only on the cpus specified by the cpumask.
Since perfmon only needs to open a single counter per event for a
given IDXD device, the perfmon driver will create a sysfs cpumask file
for the device and insert the first cpu of the system into it.  When a
user uses perf to open an event, perf will open a single counter on
the cpu specified by the cpu mask.  This amounts to the default
system-wide rather than per-cpu counting mentioned previously for
perfmon pmu events.  In order to keep the cpu mask up-to-date, the
driver implements cpu hotplug support for multiple devices, as IDXD
usually enumerates and registers more than one idxd device.

The perfmon driver implements basic perfmon hardware capability
discovery and configuration, and is initialized by the IDXD driver's
probe function.  During initialization, the driver retrieves the total
number of supported performance counters, the pmu ID, and the device
type from idxd device, and registers itself under the Linux perf
framework.

The perf userspace tool can be used to monitor single or multiple
events depending on the given configuration, as well as event groups,
which are also supported by the perfmon driver.  The user configures
events using the perf tool command-line interface by specifying the
event and corresponding event category, along with an optional set of
filters that can be used to restrict counting to specific work queues,
traffic classes, page and transfer sizes, and engines (See [1] for
specifics).

With the configuration specified by the user, the perf tool issues a
system call passing that information to the kernel, which uses it to
initialize the specified event(s).  The event(s) are opened and
started, and following termination of the perf command, they're
stopped.  At that point, the perfmon driver will read the latest count
for the event(s), calculate the difference between the latest counter
values and previously tracked counter values, and display the final
incremental count as the event count for the cycle.  An overflow
handler registered on the IDXD irq path is used to account for counter
overflows, which are signaled by an overflow interrupt.

Below are a couple of examples of perf usage for monitoring DSA events.

The following monitors all events in the 'engine' category.  Becuuse
no filters are specified, this captures all engine events for the
workload, which in this case is 19 iterations of the work generated by
the kernel dmatest module.

Details describing the events can be found in Appendix D of [1],
Performance Monitoring Events, but briefly they are:

  event 0x1:  total input data processed, in 32-byte units
  event 0x2:  total data written, in 32-byte units
  event 0x4:  number of work descriptors that read the source
  event 0x8:  number of work descriptors that write the destination
  event 0x10: number of work descriptors dispatched from batch descriptors
  event 0x20: number of work descriptors dispatched from work queues

 # perf stat -e dsa0/event=0x1,event_category=0x1/,
                dsa0/event=0x2,event_category=0x1/,
		dsa0/event=0x4,event_category=0x1/,
		dsa0/event=0x8,event_category=0x1/,
		dsa0/event=0x10,event_category=0x1/,
		dsa0/event=0x20,event_category=0x1/
		  modprobe dmatest channel=dma0chan0 timeout=2000
		  iterations=19 run=1 wait=1

     Performance counter stats for 'system wide':

                 5,332      dsa0/event=0x1,event_category=0x1/
                 5,327      dsa0/event=0x2,event_category=0x1/
                    19      dsa0/event=0x4,event_category=0x1/
                    19      dsa0/event=0x8,event_category=0x1/
                     0      dsa0/event=0x10,event_category=0x1/
                    19      dsa0/event=0x20,event_category=0x1/

          21.977436186 seconds time elapsed

The command below illustrates filter usage with a simple example.  It
specifies that MEM_MOVE operations should be counted for the DSA
device dsa0 (event 0x8 corresponds to the EV_MEM_MOVE event - Number
of Memory Move Descriptors, which is part of event category 0x3 -
Operations. The detailed category and event IDs are available in
Appendix D, Performance Monitoring Events, of [1]).  In addition to
the event and event category, a number of filters are also specified
(the detailed filter values are available in Chapter 6.4 (Filter
Support) of [1]), which will restrict counting to only those events
that meet all of the filter criteria.  In this case, the filters
specify that only MEM_MOVE operations that are serviced by work queue
wq0 and specifically engine number engine0 and traffic class tc0
having sizes between 0 and 4k and page size of between 0 and 1G result
in a counter hit; anything else will be filtered out and not appear in
the final count.  Note that filters are optional - any filter not
specified is assumed to be all ones and will pass anything.

 # perf stat -e dsa0/filter_wq=0x1,filter_tc=0x1,filter_sz=0x7,
                filter_eng=0x1,event=0x8,event_category=0x3/
		  modprobe dmatest channel=dma0chan0 timeout=2000
		  iterations=19 run=1 wait=1

     Performance counter stats for 'system wide':

       19      dsa0/filter_wq=0x1,filter_tc=0x1,filter_sz=0x7,
               filter_eng=0x1,event=0x8,event_category=0x3/

          21.865914091 seconds time elapsed

The output above reflects that the unspecified workload resulted in
the counting of 19 MEM_MOVE operation events that met the filter
criteria.

[1]: https://software.intel.com/content/www/us/en/develop/download/intel-data-streaming-accelerator-preliminary-architecture-specification.html

[ Based on work originally by Jing Lin. ]
Reviewed-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NKan Liang <kan.liang@linux.intel.com>
Signed-off-by: NTom Zanussi <tom.zanussi@linux.intel.com>
Link: https://lore.kernel.org/r/0c5080a7d541904c4ad42b848c76a1ce056ddac7.1619276133.git.zanussi@kernel.orgSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit a1610461
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit a1610461 dmaengine: idxd: remove MSIX masking for interrupt handlers.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Remove interrupt masking and just let the hard irq handler keep
firing for new events. This is less of a performance impact vs
the MMIO readback inside the pci_msi_{mask,unmas}_irq(). Especially
with a loaded system those flushes can be stuck behind large amounts
of MMIO writes to flush. When guest kernel is running on top of VFIO
mdev, mask/unmask causes a vmexit each time and is not desirable.
Suggested-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NDan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161894523436.3210025.1834640110556139277.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 53b2ee7f
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 53b2ee7f dmaengine: idxd: device cmd should use dedicated lock.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Create a dedicated lock for device command operations. Put the device
command operation under finer grained locking instead of using the
idxd->dev_lock.
Suggested-by: NSanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894525685.3210132.16160045731436382560.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 5b0c68c4
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 5b0c68c4 dmaengine: idxd: support reporting of halt interrupt.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Unmask the halt error interrupt so it gets reported to the interrupt
handler. When halt state interrupt is received, quiesce the kernel
WQs and unmap the portals to stop submission.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894441167.3202472.9485946398140619501.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit cf5f86a7
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit cf5f86a7 dmaengine: idxd: enable SVA feature for IOMMU.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Enable IOMMU_DEV_FEAT_SVA before attempt to bind pasid. This is needed
according to iommu_sva_bind_device() comment. Currently Intel IOMMU code
does this before bind call. It really needs to be controlled by the driver.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894440621.3202472.17644507396206848134.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 8241571f
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 8241571f dmaengine: idxd: convert sprintf() to sysfs_emit() for all usages.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Convert sprintf() to sysfs_emit() in order to check buffer overrun on sysfs
outputs.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894440044.3202472.13926639619695319753.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit eb15e715
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit eb15e715 dmaengine: idxd: add interrupt handle request and release support.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

DSA spec states that when Request Interrupt Handle and Release Interrupt
Handle command bits are set in the CMDCAP register, these device commands
must be supported by the driver.

The interrupt handle is programmed in a descriptor. When Request Interrupt
Handle is not supported, the interrupt handle is the index of the desired
entry in the MSI-X table. When the command is supported, driver must use
the command to obtain a handle to be programmed in the submitted
descriptor.

A requested handle may be revoked. After the handle is revoked, any use of
the handle will result in Invalid Interrupt Handle error.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894439422.3202472.17579543737810265471.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 8c66bbdc
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 8c66bbdc dmaengine: idxd: add support for readonly config mode.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The read-only configuration mode is defined by the DSA spec as a mode of
the device WQ configuration. When GENCAP register bit 31 is set to 0,
the device is in RO mode and group configuration and some fields of the
workqueue configuration registers are read-only and reflect the fixed
configuration of the device. Add support for RO mode. The driver will
load the values from the registers directly setup all the internally
cached data structures based on the device configuration.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894438847.3202472.6317563824045432727.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 93a40a6d
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 93a40a6d dmaengine: idxd: add percpu_ref to descriptor submission path.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Current submission path has no way to restrict the submitter from
stop submiting on shutdown path or wq disable path. This provides a way to
quiesce the submission path.

Modeling after 'struct reqeust_queue' usage of percpu_ref. One of the
abilities of per_cpu reference counting is the ability to stop new
references from being taken while awaiting outstanding references to be
dropped. On wq shutdown, we want to block any new submissions to the kernel
workqueue and quiesce before disabling. The percpu_ref allows us to block
any new submissions and wait for any current submission calls to finish
submitting to the workqueue.

A percpu_ref is embedded in each idxd_wq context to allow control for
individual wq. The wq->wq_active counter is elevated before calling
movdir64b() or enqcmds() to submit a descriptor to the wq and dropped once
the submission call completes. The function is gated by
percpu_ref_tryget_live(). On shutdown with percpu_ref_kill() called, any
new submission would be blocked from acquiring a ref and failed. Once all
references are dropped for the wq, shutdown can continue.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894438293.3202472.14894701611500822232.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 435b512d
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 435b512d dmaengine: idxd: remove detection of device type.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Move all static data type for per device type to an idxd_driver_data data
structure. The data can be attached to the pci_device_id and provided by
the pci probe function. This removes a lot of unnecessary type detection
and setup code.
Suggested-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852988924.2203940.2787590808682466398.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 4b73e4eb
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 4b73e4eb dmaengine: idxd: iax bus removal.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

There is no need to have an additional bus for the IAX device. The removal
of IAX will change user ABI as /sys/bus/iax will no longer exist.
The iax device will be moved to the dsa bus. The device id for dsa and
iax will now be combined rather than unique for each device type in order
to accommodate the iax devices. This is in preparation for fixing the
sub-driver code for idxd. There's no hardware deployment for Sapphire
Rapids platform yet, which means that users have no reason to have
developed scripts against this ABI. There is some exposure to
released versions of accel-config, but those are being fixed up and
an accel-config upgrade is reasonable to get IAX support. As far as
accel-config is concerned IAX support starts when these devices appear
under /sys/bus/dsa, and old accel-config just assumes that an empty /
missing /sys/bus/iax just means a lack of platform support.

Fixes: f25b4638 ("dmaengine: idxd: add IAX configuration support in the IDXD driver")
Suggested-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852988298.2203940.4529909758034944428.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit defe49f9
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit defe49f9 dmaengine: idxd: fix group conf_dev lifetime.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Remove devm_* allocation and fix group->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
group->conf_dev destruction time.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852987144.2203940.8830315575880047.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 75b91130
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 75b91130 dmaengine: idxd: fix engine conf_dev lifetime.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Remove devm_* allocation and fix engine->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
engine conf_dev destruction time.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852986460.2203940.16603218225412118431.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 7c5dd23e
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 7c5dd23e dmaengine: idxd: fix wq conf_dev 'struct device' lifetime.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Remove devm_* allocation and fix wq->conf_dev 'struct device' lifetime.
Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE. Add release
functions in order to free the allocated memory for the wq context at
device destruction time.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852985907.2203940.6840120734115043753.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 47c16ac2
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 47c16ac2 dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Fix idxd->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
appropriate time.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852985319.2203940.4650791514462735368.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit f7f77398
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit f7f77398 dmaengine: idxd: use ida for device instance enumeration.
Incremental backporting patches for DSA/IAX on Intel Xeon platform.

--------------------------------

The idr is only used for an device id, never to lookup context from that
id. Switch to plain ida.

Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852984730.2203940.15032482460902003819.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit a39c7cd0
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit a39c7cd0 dmaengine: idxd: removal of pcim managed mmio mapping.
Incremental backporting patches for DSA/IAX on Intel Xeon platform.

--------------------------------

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Remove pcim_* management of the PCI device
and the ioremap of MMIO BAR and replace with unmanaged versions. This is
for consistency of removing all the pcim/devm based calls.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NDan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852984150.2203940.8043988289748519056.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.13
commit 5fc8e85f
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 5fc8e85f dmaengine: idxd: cleanup pci interrupt vector allocation management.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Remove devm managed pci interrupt vectors
and replace with unmanged allocators.
Reported-by: NJason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NDan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161852983563.2203940.8116028229124776669.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.12
commit 6df0e6c5
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 6df0e6c5 dmaengine: idxd: clear MSIX permission entry on shutdown.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add disabling/clearing of MSIX permission entries on device shutdown to
mirror the enabling of the MSIX entries on probe. Current code left the
MSIX enabled and the pasid entries still programmed at device shutdown.

Fixes: 8e50d392 ("dmaengine: idxd: Add shared workqueue support")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161824457969.882533.6020239898682672311.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.12
commit 03d939c7
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 03d939c7 dmaengine: idxd: add module parameter to force disable of SVA.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add a module parameter that overrides the SVA feature enabling. This keeps
the driver in legacy mode even when intel_iommu=sm_on is set. In this mode,
the descriptor fields must be programmed with dma_addr_t from the Linux DMA
API for source, destination, and completion descriptors.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161134110457.4005461.13171197785259115852.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.12
commit 6ae58d87
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 6ae58d87 x86/asm: Annotate movdir64b()'s dst argument with __iomem.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add a missing __iomem annotation to address a sparse warning. The caller
is expected to pass an __iomem annotated pointer to this function. The
current usages send a 64-bytes command descriptor to an MMIO location
(portal) on a device for consumption. When future usages for the
MOVDIR64B instruction warrant a separate variant of a memory to memory
operation, the argument annotation can be revisited.

Also, from the comment in movdir64b() @__dst must be supplied as an
lvalue because this tells the compiler what the object is (its size) the
instruction accesses. I.e., not the pointers but what they point to,
thus the deref'ing '*'."

The actual sparse warning is:

  sparse warnings: (new ones prefixed by >>)
     drivers/dma/idxd/submit.c: note: in included file (through include/linux/io.h, include/linux/pci.h):
  >> arch/x86/include/asm/io.h:422:27: sparse: sparse: incorrect type in \
     argument 1 (different address spaces)
		   @@     expected void *dst
		   @@     got void [noderef] __iomem *dst @@
     arch/x86/include/asm/io.h:422:27: sparse:     expected void *dst
     arch/x86/include/asm/io.h:422:27: sparse:     got void [noderef] __iomem *dst

 [ bp: Massage commit message. ]

Fixes: 0888e103 ("x86/asm: Carve out a generic movdir64b() helper for general usage")
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Reviewed-by: NBen Widawsky <ben.widawsky@intel.com>
Reviewed-by: NDan Williams <dan.j.williams@intel.com>
Link: https://lkml.kernel.org/r/161003787823.4062451.6564503265464317197.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.12
commit e2fcd6e4
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit e2fcd6e4 dma: idxd: use DEFINE_MUTEX() for mutex lock.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Acked-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20201224132254.30961-1-zhengyongjun3@huawei.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit 16e19e11
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 16e19e11 dmaengine: idxd: Fix list corruption in description completion.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Sanjay reported the following kernel splat after running dmatest for stress
testing. The current code is giving up the spinlock in the middle of
a completion list walk, and that opens up opportunity for list corruption
if another thread touches the list at the same time. In order to make sure
the list is always protected, the hardware completed descriptors will be
put on a local list to be completed with callbacks from the outside of
the list lock.

kernel: general protection fault, probably for non-canonical address 0xdead000000000100: 0000 [#1] SMP NOPTI
kernel: CPU: 62 PID: 1814 Comm: irq/89-idxd-por Tainted: G        W         5.10.0-intel-next_10_16+ #1
kernel: Hardware name: Intel Corporation ArcherCity/ArcherCity, BIOS EGSDCRB1.SBT.4915.D02.2012070418 12/07/2020
kernel: RIP: 0010:irq_process_work_list+0xcd/0x170 [idxd]
kernel: Code: e8 18 65 5c d3 8b 45 d4 85 c0 75 b3 4c 89 f7 e8 b9 fe ff ff 84 c0 74 bf 4c 89 e7 e8 dd 6b 5c d3 49 8b 3f 49 8b 4f 08 48 89 c6 <48> 89 4f 08 48 89 39 4c 89 e7 48 b9 00 01 00 00 00 00 ad de 49 89
kernel: RSP: 0018:ff256768c4353df8 EFLAGS: 00010046
kernel: RAX: 0000000000000202 RBX: dead000000000100 RCX: dead000000000122
kernel: RDX: 0000000000000001 RSI: 0000000000000202 RDI: dead000000000100
kernel: RBP: ff256768c4353e40 R08: 0000000000000001 R09: 0000000000000000
kernel: R10: 0000000000000000 R11: 00000000ffffffff R12: ff1fdf9fd06b3e48
kernel: R13: 0000000000000005 R14: ff1fdf9fc4275980 R15: ff1fdf9fc4275a00
kernel: FS:  0000000000000000(0000) GS:ff1fdfa32f880000(0000) knlGS:0000000000000000
kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 00007f87f24012a0 CR3: 000000010f630004 CR4: 0000000003771ee0
kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kernel: DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400
kernel: PKRU: 55555554
kernel: Call Trace:
kernel: ? irq_thread+0xa9/0x1b0
kernel: idxd_wq_thread+0x34/0x90 [idxd]
kernel: irq_thread_fn+0x24/0x60
kernel: irq_thread+0x10f/0x1b0
kernel: ? irq_forced_thread_fn+0x80/0x80
kernel: ? wake_threads_waitq+0x30/0x30
kernel: ? irq_thread_check_affinity+0xe0/0xe0
kernel: kthread+0x142/0x160
kernel: ? kthread_park+0x90/0x90
kernel: ret_from_fork+0x1f/0x30
kernel: Modules linked in: idxd_ktest dmatest intel_rapl_msr idxd_mdev iTCO_wdt vfio_pci vfio_virqfd iTCO_vendor_support intel_rapl_common i10nm_edac nfit x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper rapl msr pcspkr snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg ofpart snd_hda_codec snd_hda_core snd_hwdep cmdlinepart snd_seq snd_seq_device idxd snd_pcm intel_spi_pci intel_spi snd_timer spi_nor input_leds joydev snd i2c_i801 mtd soundcore i2c_smbus mei_me mei i2c_ismt ipmi_ssif acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler mac_hid sunrpc nls_iso8859_1 sch_fq_codel ip_tables x_tables xfs libcrc32c ast drm_vram_helper drm_ttm_helper ttm igc wmi pinctrl_sunrisepoint hid_generic usbmouse usbkbd usbhid hid
kernel: ---[ end trace cd5ca950ef0db25f ]---
Reported-by: NSanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Tested-by: NSanjay Kumar <sanjay.k.kumar@intel.com>
Fixes: e4f4d8cd ("dmaengine: idxd: Clean up descriptors with fault error")
Link: https://lore.kernel.org/r/161074757267.2183951.17912830858060607266.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit f25b4638
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit f25b4638 dmaengine: idxd: add IAX configuration support in the IDXD driver.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add support to allow configuration of Intel Analytics Accelerator (IAX) in
addition to the Intel Data Streaming Accelerator (DSA). The IAX hardware
has the same configuration interface as DSA. The main difference
is the type of operations it performs. We can support the DSA and
IAX devices on the same driver with some tweaks.

IAX has a 64B completion record that needs to be 64B aligned, as opposed to
a 32B completion record that is 32B aligned for DSA. IAX also does not
support token management.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160564555488.1834439.4261958859935360473.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit 92de5fa2
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 92de5fa2 dmaengine: idxd: add ATS disable knob for work queues.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

With the DSA spec 1.1 update, a knob to disable ATS for individually is
introduced. Add enabling code to allow a system admin to make the
configuration through sysfs.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160530810593.1288392.2561048329116529566.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit 2f8417a9
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 2f8417a9 dmaengine: idxd: define table offset multiplier.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Convert table offset multiplier magic number to a define.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160407311690.839435.6941865731867828234.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit 5a712701
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 5a712701 dmaengine: idxd: Update calculation of group offset to be more readable.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Create helper macros to make group offset calculation more readable.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160407294683.839093.10740868559754142070.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

mainline inclusion
from mainline-v5.11
commit 4749f51d
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit 4749f51d dmaengine: idxd: Add ABI documentation for shared wq.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

Add the sysfs attribute bits in ABI/stable for shared wq support.
Signed-off-by: NJing Lin <jing.lin@intel.com>
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NTony Luck <tony.luck@intel.com>
Reviewed-by: NDan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/160382008649.3911367.10851752182908509837.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>