drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c- Extension
.c- Size
- 3004 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.
- 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
Detected Declarations
function filesfunction gf100_pcie_set_versionfunction gf100_pcie_versionfunction gf100_pcie_set_cap_speedfunction gf100_pcie_cap_speedfunction gf100_pcie_initfunction gf100_pcie_set_linkfunction gf100_pci_new
Annotated Snippet
#include "priv.h"
static void
gf100_pci_msi_rearm(struct nvkm_pci *pci)
{
nvkm_pci_wr08(pci, 0x0704, 0xff);
}
void
gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
{
struct nvkm_device *device = pci->subdev.device;
nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
}
int
gf100_pcie_version(struct nvkm_pci *pci)
{
struct nvkm_device *device = pci->subdev.device;
return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
}
void
gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
{
struct nvkm_device *device = pci->subdev.device;
nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
}
int
gf100_pcie_cap_speed(struct nvkm_pci *pci)
{
struct nvkm_device *device = pci->subdev.device;
u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
if (punits_pci_cap_speed == 0x80)
return 1;
return 0;
}
int
gf100_pcie_init(struct nvkm_pci *pci)
{
bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
gf100_pcie_set_cap_speed(pci, full_speed);
return 0;
}
int
gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
{
gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
g84_pcie_set_link_speed(pci, speed);
return 0;
}
static const struct nvkm_pci_func
gf100_pci_func = {
.cfg = { .addr = 0x088000, .size = 0x1000 },
.init = g84_pci_init,
.msi_rearm = gf100_pci_msi_rearm,
.pcie.init = gf100_pcie_init,
.pcie.set_link = gf100_pcie_set_link,
.pcie.max_speed = g84_pcie_max_speed,
.pcie.cur_speed = g84_pcie_cur_speed,
.pcie.set_version = gf100_pcie_set_version,
.pcie.version = gf100_pcie_version,
.pcie.version_supported = g92_pcie_version_supported,
};
int
gf100_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_pci **ppci)
{
return nvkm_pci_new_(&gf100_pci_func, device, type, inst, ppci);
}
Annotation
- Immediate include surface: `priv.h`.
- Detected declarations: `function files`, `function gf100_pcie_set_version`, `function gf100_pcie_version`, `function gf100_pcie_set_cap_speed`, `function gf100_pcie_cap_speed`, `function gf100_pcie_init`, `function gf100_pcie_set_link`, `function gf100_pci_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.