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1What: /sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/cap2Date: December 3, 20093KernelVersion: 2.6.324Contact: dmaengine@vger.kernel.org5Description: Capabilities the DMA supports.Currently there are DMA_PQ, DMA_PQ_VAL,6 DMA_XOR,DMA_XOR_VAL,DMA_INTERRUPT.7 8What: /sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/ring_active9Date: December 3, 200910KernelVersion: 2.6.3211Contact: dmaengine@vger.kernel.org12Description: The number of descriptors active in the ring.13 14What: /sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/ring_size15Date: December 3, 200916KernelVersion: 2.6.3217Contact: dmaengine@vger.kernel.org18Description: Descriptor ring size, total number of descriptors available.19 20What: /sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/version21Date: December 3, 200922KernelVersion: 2.6.3223Contact: dmaengine@vger.kernel.org24Description: Version of ioatdma device.25 26What: /sys/devices/pciXXXX:XX/0000:XX:XX.X/dma/dma<n>chan<n>/quickdata/intr_coalesce27Date: August 8, 201728KernelVersion: 4.1429Contact: dmaengine@vger.kernel.org30Description: Tune-able interrupt delay value per channel basis.31