drivers/gpu/drm/nouveau/nvkm/subdev/fb/nv41.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/nvkm/subdev/fb/nv41.c

Extension

.c

Size

2164 bytes

Lines

63

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

• priv.h
• ram.h

Detected Declarations

• function Copyright
• function nv41_fb_init
• function nv41_fb_new

Annotated Snippet

#include "priv.h"
#include "ram.h"

void
nv41_fb_tile_prog(struct nvkm_fb *fb, int i, struct nvkm_fb_tile *tile)
{
	struct nvkm_device *device = fb->subdev.device;
	nvkm_wr32(device, 0x100604 + (i * 0x10), tile->limit);
	nvkm_wr32(device, 0x100608 + (i * 0x10), tile->pitch);
	nvkm_wr32(device, 0x100600 + (i * 0x10), tile->addr);
	nvkm_rd32(device, 0x100600 + (i * 0x10));
	nvkm_wr32(device, 0x100700 + (i * 0x04), tile->zcomp);
}

void
nv41_fb_init(struct nvkm_fb *fb)
{
	nvkm_wr32(fb->subdev.device, 0x100800, 0x00000001);
}

static const struct nvkm_fb_func
nv41_fb = {
	.tags = nv20_fb_tags,
	.init = nv41_fb_init,
	.tile.regions = 12,
	.tile.init = nv30_fb_tile_init,
	.tile.comp = nv40_fb_tile_comp,
	.tile.fini = nv20_fb_tile_fini,
	.tile.prog = nv41_fb_tile_prog,
	.ram_new = nv41_ram_new,
};

int
nv41_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
{
	return nvkm_fb_new_(&nv41_fb, device, type, inst, pfb);
}

Annotation

• Immediate include surface: `priv.h`, `ram.h`.
• Detected declarations: `function Copyright`, `function nv41_fb_init`, `function nv41_fb_new`.
• 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.