drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c- Extension
.c- Size
- 2903 bytes
- Lines
- 97
- 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
amdgpu.hamdgpu_ras.h
Detected Declarations
function Copyrightfunction amdgpu_nbio_get_pcie_replay_countfunction amdgpu_nbio_is_replay_cnt_supportedfunction amdgpu_nbio_ras_late_initfunction amdgpu_nbio_program_aspm
Annotated Snippet
#include "amdgpu.h"
#include "amdgpu_ras.h"
int amdgpu_nbio_ras_sw_init(struct amdgpu_device *adev)
{
int err;
struct amdgpu_nbio_ras *ras;
if (!adev->nbio.ras)
return 0;
ras = adev->nbio.ras;
err = amdgpu_ras_register_ras_block(adev, &ras->ras_block);
if (err) {
dev_err(adev->dev, "Failed to register pcie_bif ras block!\n");
return err;
}
strcpy(ras->ras_block.ras_comm.name, "pcie_bif");
ras->ras_block.ras_comm.block = AMDGPU_RAS_BLOCK__PCIE_BIF;
ras->ras_block.ras_comm.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
adev->nbio.ras_if = &ras->ras_block.ras_comm;
return 0;
}
u64 amdgpu_nbio_get_pcie_replay_count(struct amdgpu_device *adev)
{
if (adev->nbio.funcs && adev->nbio.funcs->get_pcie_replay_count)
return adev->nbio.funcs->get_pcie_replay_count(adev);
return 0;
}
bool amdgpu_nbio_is_replay_cnt_supported(struct amdgpu_device *adev)
{
if (amdgpu_sriov_vf(adev) || !adev->asic_funcs ||
!adev->asic_funcs->get_pcie_replay_count ||
(!adev->nbio.funcs || !adev->nbio.funcs->get_pcie_replay_count))
return false;
return true;
}
int amdgpu_nbio_ras_late_init(struct amdgpu_device *adev, struct ras_common_if *ras_block)
{
int r;
r = amdgpu_ras_block_late_init(adev, ras_block);
if (r)
return r;
if (amdgpu_ras_is_supported(adev, ras_block->block)) {
r = amdgpu_irq_get(adev, &adev->nbio.ras_controller_irq, 0);
if (r)
goto late_fini;
r = amdgpu_irq_get(adev, &adev->nbio.ras_err_event_athub_irq, 0);
if (r)
goto late_fini;
}
return 0;
late_fini:
amdgpu_ras_block_late_fini(adev, ras_block);
return r;
}
void amdgpu_nbio_program_aspm(struct amdgpu_device *adev)
{
if (!amdgpu_device_should_use_aspm(adev))
return;
if (adev->nbio.funcs->program_aspm)
adev->nbio.funcs->program_aspm(adev);
}
Annotation
- Immediate include surface: `amdgpu.h`, `amdgpu_ras.h`.
- Detected declarations: `function Copyright`, `function amdgpu_nbio_get_pcie_replay_count`, `function amdgpu_nbio_is_replay_cnt_supported`, `function amdgpu_nbio_ras_late_init`, `function amdgpu_nbio_program_aspm`.
- 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.