drivers/gpu/drm/nouveau/nvkm/subdev/bios/npde.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/bios/npde.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/bios/npde.c
Extension
.c
Size
2024 bytes
Lines
60
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.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (nvbios_rd32(bios, data + 0x00)) {
		case 0x4544504e: /* NPDE */
			break;
		default:
			nvkm_debug(&bios->subdev,
				   "%08x: NPDE signature (%08x) unknown\n",
				   data, nvbios_rd32(bios, data + 0x00));
			data = 0;
			break;
		}
	}
	return data;
}

u32
nvbios_npdeTp(struct nvkm_bios *bios, u32 base, struct nvbios_npdeT *info)
{
	u32 data = nvbios_npdeTe(bios, base);
	memset(info, 0x00, sizeof(*info));
	if (data) {
		info->image_size = nvbios_rd16(bios, data + 0x08) * 512;
		info->last = nvbios_rd08(bios, data + 0x0a) & 0x80;
	}
	return data;
}

Annotation

Implementation Notes