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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1424 bytes

Lines

46

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_volt

Annotated Snippet

struct nvkm_volt {
	const struct nvkm_volt_func *func;
	struct nvkm_subdev subdev;

	u8 vid_mask;
	u8 vid_nr;
	struct {
		u32 uv;
		u8 vid;
	} vid[256];

	u32 max_uv;
	u32 min_uv;

	/*
	 * These are fully functional map entries creating a sw ceiling for
	 * the voltage. These all can describe different kind of curves, so
	 * that for any given temperature a different one can return the lowest
	 * value of all three.
	 */
	u8 max0_id;
	u8 max1_id;
	u8 max2_id;

	int speedo;
};

int nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temperature);
int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
int nvkm_volt_get(struct nvkm_volt *);
int nvkm_volt_set_id(struct nvkm_volt *, u8 id, u8 min_id, u8 temp,
		     int condition);

int nv40_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
int gf100_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
int gf117_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
int gk104_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
int gk20a_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
int gm20b_volt_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_volt **);
#endif

Annotation

• Immediate include surface: `core/subdev.h`.
• Detected declarations: `struct nvkm_volt`.
• 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.