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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1365 bytes

Lines

41

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_memory
• struct nvkm_instmem

Annotated Snippet

struct nvkm_instmem {
	const struct nvkm_instmem_func *func;
	struct nvkm_subdev subdev;

	bool suspend;

	spinlock_t lock;
	struct list_head list;
	struct list_head boot;
	u32 reserved;

	/* <=nv4x: protects NV_PRAMIN/BAR2 MM
	 * >=nv50: protects BAR2 MM & LRU
	 */
	struct mutex mutex;

	struct nvkm_memory *vbios;
	struct nvkm_ramht  *ramht;
	struct nvkm_memory *ramro;
	struct nvkm_memory *ramfc;
};

u32 nvkm_instmem_rd32(struct nvkm_instmem *, u32 addr);
void nvkm_instmem_wr32(struct nvkm_instmem *, u32 addr, u32 data);
int nvkm_instobj_new(struct nvkm_instmem *, u32 size, u32 align, bool zero, bool preserve,
		     struct nvkm_memory **);
int nvkm_instobj_wrap(struct nvkm_device *, struct nvkm_memory *, struct nvkm_memory **);

int nv04_instmem_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_instmem **);
int nv40_instmem_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_instmem **);
int nv50_instmem_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_instmem **);
int gk20a_instmem_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_instmem **);
int gh100_instmem_new(struct nvkm_device *, enum nvkm_subdev_type, int, struct nvkm_instmem **);
#endif

Annotation

• Immediate include surface: `core/subdev.h`.
• Detected declarations: `struct nvkm_memory`, `struct nvkm_instmem`.
• 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.