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

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c
Extension
.c
Size
3350 bytes
Lines
103
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

if (data) {
			*ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
			*hdr = nvbios_rd08(bios, data + 0x01);
			*len = nvbios_rd08(bios, data + 0x02);
			*cnt = nvbios_rd08(bios, data + 0x03);
		}
	}

	return data;
}

u32
nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
{
	u8  cnt, len;
	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
	if (data && idx < cnt) {
		data = data + *hdr + (idx * len);
		*hdr = len;
		return data;
	}
	return 0;
}

u32
nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
	     struct nvbios_pmuE *info)
{
	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
	if (data) {
		info->type = nvbios_rd08(bios, data + 0x00);
		info->data = nvbios_rd32(bios, data + 0x02);
	}
	return data;
}

bool
nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
{
	struct nvbios_pmuE pmuE;
	u8  ver, hdr, idx = 0;
	u32 data;
	memset(info, 0x00, sizeof(*info));
	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
		if (pmuE.type == type && (data = pmuE.data)) {
			info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
			info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
			info->boot_addr     = data + 0x30;
			info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
					      nvbios_rd32(bios, data + 0x18);
			info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
					      nvbios_rd32(bios, data + 0x18);
			info->code_addr     = info->boot_addr + info->boot_size;
			info->code_addr_pmu = info->boot_addr_pmu +
					      info->boot_size;
			info->code_size     = nvbios_rd32(bios, data + 0x20);
			info->data_addr     = data + 0x30 +
					      nvbios_rd32(bios, data + 0x24);
			info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
			info->data_size     = nvbios_rd32(bios, data + 0x2c);
			return true;
		}
	}
	return false;
}

Annotation

Implementation Notes