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Commit 2e442003 authored by Ujjal Singh's avatar Ujjal Singh Committed by Vinod Koul
Browse files

dmaengine: ioatdma: Add ABI document 



ABI document added to describe all sysfs variables
for dma

Signed-off-by: default avatarUjjal Singh <ujjal.singh@intel.com>
Acked-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 01fa2fae

Documentation/ABI/stable/sysfs-driver-dma-ioatdma

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What:           sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/cap

Date:           December 3, 2009

KernelVersion:  2.6.32

Contact:        dmaengine@vger.kernel.org

Description:	Capabilities the DMA supports.Currently there are DMA_PQ, DMA_PQ_VAL,

		DMA_XOR,DMA_XOR_VAL,DMA_INTERRUPT.



What:           sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/ring_active

Date:           December 3, 2009

KernelVersion:  2.6.32

Contact:        dmaengine@vger.kernel.org

Description:	The number of descriptors active in the ring.



What:           sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/ring_size

Date:           December 3, 2009

KernelVersion:  2.6.32

Contact:        dmaengine@vger.kernel.org

Description:	Descriptor ring size, total number of descriptors available.



What:           sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/version

Date:           December 3, 2009

KernelVersion:  2.6.32

Contact:        dmaengine@vger.kernel.org

Description:	Version of ioatdma device.



What:           sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/intr_coalesce

Date:           August 8, 2017

KernelVersion:  4.14

Contact:        dmaengine@vger.kernel.org

Description:	Tune-able interrupt delay value per channel basis.