drivers/gpu/drm/nouveau/include/nvkm/subdev/bus.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/include/nvkm/subdev/bus.h

Extension

.h

Size

1108 bytes

Lines

27

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/subdev.h

Detected Declarations

• struct nvkm_bus
• struct nvkm_hwsq

Annotated Snippet

struct nvkm_bus {
	const struct nvkm_bus_func *func;
	struct nvkm_subdev subdev;
};

/* interface to sequencer */
struct nvkm_hwsq;
int  nvkm_hwsq_init(struct nvkm_subdev *, struct nvkm_hwsq **);
int  nvkm_hwsq_fini(struct nvkm_hwsq **, bool exec);
void nvkm_hwsq_wr32(struct nvkm_hwsq *, u32 addr, u32 data);
void nvkm_hwsq_setf(struct nvkm_hwsq *, u8 flag, int data);
void nvkm_hwsq_wait(struct nvkm_hwsq *, u8 flag, u8 data);
void nvkm_hwsq_wait_vblank(struct nvkm_hwsq *);
void nvkm_hwsq_nsec(struct nvkm_hwsq *, u32 nsec);

int nv04_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
int nv31_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
int nv50_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
int g94_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
int gf100_bus_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_bus **);
#endif

Annotation

• Immediate include surface: `core/subdev.h`.
• Detected declarations: `struct nvkm_bus`, `struct nvkm_hwsq`.
• 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.