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| author |   Dave Jiang <dave.jiang@intel.com> | 2022-09-17 09:12:22 -0700 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2022-09-29 22:46:08 +0530 |
| commit | 7ca68fa3c8ab83dfa539f16c5b4b1aec2e33320d (patch) | |
| tree | d2297934d9f37825cbe31c848cad90b86a91a9e8 /Documentation/ABI/stable/sysfs-driver-dma-idxd | |
| parent | dmaengine: idxd: add configuration for concurrent work descriptor processing (diff) | |
| download | linux-dev-7ca68fa3c8ab83dfa539f16c5b4b1aec2e33320d.tar.xz linux-dev-7ca68fa3c8ab83dfa539f16c5b4b1aec2e33320d.zip | |
dmaengine: idxd: add configuration for concurrent batch descriptor processing
Add sysfs knob to allow control of the number of batch descriptors that can
be concurrently processed by an engine in the group as a fraction of the
Maximum Work Descriptors in Progress value specfied in ENGCAP register.
This control knob is part of toggle for QoS control.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20220917161222.2835172-6-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/ABI/stable/sysfs-driver-dma-idxd')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-dma-idxd | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd index 02a721a8ea68..8e2c2c405db2 100644 --- a/Documentation/ABI/stable/sysfs-driver-dma-idxd +++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd @@ -278,3 +278,15 @@ Description: Allows control of the number of work descriptors that can be 1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of the max value). It's visible only on platforms that support the capability. + +What: /sys/bus/dsa/devices/group<m>.<n>/batch_progress_limit +Date: Sept 14, 2022 +KernelVersion: 6.0.0 +Contact: dmaengine@vger.kernel.org +Description: Allows control of the number of batch descriptors that can be + concurrently processed by an engine in the group as a fraction + of the Maximum Batch Descriptors in Progress value specified in + the ENGCAP register. The acceptable values are 0 (default), + 1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of + the max value). It's visible only on platforms that support + the capability. |