drivers/gpu/drm/nouveau/nvkm/subdev/bios/boost.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/bios/boost.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/bios/boost.c- Extension
.c- Size
- 3628 bytes
- Lines
- 127
- 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
subdev/bios.hsubdev/bios/bit.hsubdev/bios/boost.h
Detected Declarations
function filesfunction nvbios_boostEefunction nvbios_boostEpfunction nvbios_boostEmfunction nvbios_boostSefunction nvbios_boostSp
Annotated Snippet
if (boost) {
*ver = nvbios_rd08(bios, boost + 0);
switch (*ver) {
case 0x11:
*hdr = nvbios_rd08(bios, boost + 1);
*cnt = nvbios_rd08(bios, boost + 5);
*len = nvbios_rd08(bios, boost + 2);
*snr = nvbios_rd08(bios, boost + 4);
*ssz = nvbios_rd08(bios, boost + 3);
return boost;
default:
break;
}
}
}
return 0;
}
u32
nvbios_boostEe(struct nvkm_bios *bios, int idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
u8 snr, ssz;
u32 data = nvbios_boostTe(bios, ver, hdr, cnt, len, &snr, &ssz);
if (data && idx < *cnt) {
data = data + *hdr + (idx * (*len + (snr * ssz)));
*hdr = *len;
*cnt = snr;
*len = ssz;
return data;
}
return 0;
}
u32
nvbios_boostEp(struct nvkm_bios *bios, int idx,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
{
u32 data = nvbios_boostEe(bios, idx, ver, hdr, cnt, len);
memset(info, 0x00, sizeof(*info));
if (data) {
info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5;
info->min = nvbios_rd16(bios, data + 0x02) * 1000;
info->max = nvbios_rd16(bios, data + 0x04) * 1000;
}
return data;
}
u32
nvbios_boostEm(struct nvkm_bios *bios, u8 pstate,
u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
{
u32 data, idx = 0;
while ((data = nvbios_boostEp(bios, idx++, ver, hdr, cnt, len, info))) {
if (info->pstate == pstate)
break;
}
return data;
}
u32
nvbios_boostSe(struct nvkm_bios *bios, int idx,
u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len)
{
if (data && idx < cnt) {
data = data + *hdr + (idx * len);
*hdr = len;
return data;
}
return 0;
}
u32
nvbios_boostSp(struct nvkm_bios *bios, int idx,
u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len,
struct nvbios_boostS *info)
{
data = nvbios_boostSe(bios, idx, data, ver, hdr, cnt, len);
memset(info, 0x00, sizeof(*info));
if (data) {
info->domain = nvbios_rd08(bios, data + 0x00);
info->percent = nvbios_rd08(bios, data + 0x01);
info->min = nvbios_rd16(bios, data + 0x02) * 1000;
info->max = nvbios_rd16(bios, data + 0x04) * 1000;
}
return data;
}
Annotation
- Immediate include surface: `subdev/bios.h`, `subdev/bios/bit.h`, `subdev/bios/boost.h`.
- Detected declarations: `function files`, `function nvbios_boostEe`, `function nvbios_boostEp`, `function nvbios_boostEm`, `function nvbios_boostSe`, `function nvbios_boostSp`.
- 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.