drivers/gpu/drm/nouveau/include/nvkm/engine/dma.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/include/nvkm/engine/dma.h

Extension

.h

Size

952 bytes

Lines

32

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• core/engine.h
• core/object.h

Detected Declarations

• struct nvkm_client
• struct nvkm_dmaobj
• struct nvkm_dma

Annotated Snippet

struct nvkm_dmaobj {
	const struct nvkm_dmaobj_func *func;
	struct nvkm_dma *dma;

	struct nvkm_object object;
	u32 target;
	u32 access;
	u64 start;
	u64 limit;
};

struct nvkm_dma {
	const struct nvkm_dma_func *func;
	struct nvkm_engine engine;
};

struct nvkm_dmaobj *nvkm_dmaobj_search(struct nvkm_client *, u64 object);

int nv04_dma_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_dma **);
int nv50_dma_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_dma **);
int gf100_dma_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_dma **);
int gf119_dma_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_dma **);
int gv100_dma_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_dma **);
#endif

Annotation

• Immediate include surface: `core/engine.h`, `core/object.h`.
• Detected declarations: `struct nvkm_client`, `struct nvkm_dmaobj`, `struct nvkm_dma`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.

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.