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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1778 bytes

Lines

49

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
• core/mm.h

Detected Declarations

• struct nvkm_ltc

Annotated Snippet

struct nvkm_ltc {
	const struct nvkm_ltc_func *func;
	struct nvkm_subdev subdev;

	u32 ltc_nr;
	u32 lts_nr;

	struct mutex mutex; /* serialises CBC operations */
	u32 num_tags;
	u32 tag_base;
	struct nvkm_memory *tag_ram;

	int zbc_color_min;
	int zbc_color_max;
	u32 zbc_color[NVKM_LTC_MAX_ZBC_COLOR_CNT][4];
	int zbc_depth_min;
	int zbc_depth_max;
	u32 zbc_depth[NVKM_LTC_MAX_ZBC_DEPTH_CNT];
	u32 zbc_stencil[NVKM_LTC_MAX_ZBC_DEPTH_CNT];
};

void nvkm_ltc_tags_clear(struct nvkm_device *, u32 first, u32 count);

int nvkm_ltc_zbc_color_get(struct nvkm_ltc *, int index, const u32[4]);
int nvkm_ltc_zbc_depth_get(struct nvkm_ltc *, int index, const u32);
int nvkm_ltc_zbc_stencil_get(struct nvkm_ltc *, int index, const u32);

void nvkm_ltc_invalidate(struct nvkm_ltc *);
void nvkm_ltc_flush(struct nvkm_ltc *);

int gf100_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gk104_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gm107_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gm200_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gp100_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gp102_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int gp10b_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
int ga102_ltc_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_ltc **);
#endif

Annotation

• Immediate include surface: `core/subdev.h`, `core/mm.h`.
• Detected declarations: `struct nvkm_ltc`.
• 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.