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| author | Xiaochen Shen <xiaochen.shen@intel.com> | 2022-09-30 23:15:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 15:32:46 +0300 |
| commit | cc743a1d832d7ab1f9024e32f241724dfcd3bee7 (patch) | |
| tree | c49e9d0d080b0e2b522a0c9d3e177dfe910ab785 /Documentation | |
| parent | 0d0382b9c0d526fc643dc24a212a360b6ee19071 (diff) | |
| download | linux-cc743a1d832d7ab1f9024e32f241724dfcd3bee7.tar.xz | |
dmaengine: idxd: Make max batch size attributes in sysfs invisible for Intel IAA
[ Upstream commit 91123b37e8a99cc489d5bdcfebd1c25f29382504 ]
In current code, dev.max_batch_size and wq.max_batch_size attributes in
sysfs are exposed to user to show or update the values.
>From Intel IAA spec [1], Intel IAA does not support batch processing. So
these sysfs attributes should not be supported on IAA device.
Fix this issue by making the attributes of max_batch_size invisible in
sysfs through is_visible() filter when the device is IAA.
Add description in the ABI documentation to mention that the attributes
are not visible when the device does not support batch.
[1]: https://cdrdv2.intel.com/v1/dl/getContent/721858
Fixes: e7184b159dd3 ("dmaengine: idxd: add support for configurable max wq batch size")
Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver")
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20220930201528.18621-3-xiaochen.shen@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-dma-idxd | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index 8e2c2c405db2..69e2d9155e0d 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -22,6 +22,7 @@ Date: Oct 25, 2019 KernelVersion: 5.6.0 Contact: dmaengine@vger.kernel.org Description: The largest number of work descriptors in a batch. + It's not visible when the device does not support batch. What: /sys/bus/dsa/devices/dsa<m>/max_work_queues_size Date: Oct 25, 2019 @@ -205,6 +206,7 @@ KernelVersion: 5.10.0 Contact: dmaengine@vger.kernel.org Description: The max batch size for this workqueue. Cannot exceed device max batch size. Configurable parameter. + It's not visible when the device does not support batch. What: /sys/bus/dsa/devices/wq<m>.<n>/ats_disable Date: Nov 13, 2020 |