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

Source file repositories/reference/linux-study-clean/Documentation/ABI/stable/sysfs-driver-dma-ioatdma

File Facts

System: Linux kernel
Corpus path: Documentation/ABI/stable/sysfs-driver-dma-ioatdma
Extension: [no extension]
Size: 1300 bytes
Lines: 31
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: Documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

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.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.