drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/amd/amdgpu/amdgpu_hdp.c- Extension
.c- Size
- 2891 bytes
- Lines
- 85
- 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.huapi/linux/kfd_ioctl.h
Detected Declarations
function filesfunction amdgpu_hdp_generic_flushfunction amdgpu_hdp_invalidatefunction amdgpu_hdp_flush
Annotated Snippet
#include "amdgpu.h"
#include "amdgpu_ras.h"
#include <uapi/linux/kfd_ioctl.h>
int amdgpu_hdp_ras_sw_init(struct amdgpu_device *adev)
{
int err;
struct amdgpu_hdp_ras *ras;
if (!adev->hdp.ras)
return 0;
ras = adev->hdp.ras;
err = amdgpu_ras_register_ras_block(adev, &ras->ras_block);
if (err) {
dev_err(adev->dev, "Failed to register hdp ras block!\n");
return err;
}
strcpy(ras->ras_block.ras_comm.name, "hdp");
ras->ras_block.ras_comm.block = AMDGPU_RAS_BLOCK__HDP;
ras->ras_block.ras_comm.type = AMDGPU_RAS_ERROR__MULTI_UNCORRECTABLE;
adev->hdp.ras_if = &ras->ras_block.ras_comm;
/* hdp ras follows amdgpu_ras_block_late_init_default for late init */
return 0;
}
void amdgpu_hdp_generic_flush(struct amdgpu_device *adev,
struct amdgpu_ring *ring)
{
if (!ring || !ring->funcs->emit_wreg) {
WREG32((adev->rmmio_remap.reg_offset +
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >>
2,
0);
if (adev->nbio.funcs->get_memsize)
adev->nbio.funcs->get_memsize(adev);
} else {
amdgpu_ring_emit_wreg(ring,
(adev->rmmio_remap.reg_offset +
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >>
2,
0);
}
}
void amdgpu_hdp_invalidate(struct amdgpu_device *adev, struct amdgpu_ring *ring)
{
if (adev->asic_funcs && adev->asic_funcs->invalidate_hdp)
adev->asic_funcs->invalidate_hdp(adev, ring);
else if (adev->hdp.funcs && adev->hdp.funcs->invalidate_hdp)
adev->hdp.funcs->invalidate_hdp(adev, ring);
}
void amdgpu_hdp_flush(struct amdgpu_device *adev, struct amdgpu_ring *ring)
{
if (adev->asic_funcs && adev->asic_funcs->flush_hdp)
adev->asic_funcs->flush_hdp(adev, ring);
else if (adev->hdp.funcs && adev->hdp.funcs->flush_hdp)
adev->hdp.funcs->flush_hdp(adev, ring);
}
Annotation
- Immediate include surface: `amdgpu.h`, `amdgpu_ras.h`, `uapi/linux/kfd_ioctl.h`.
- Detected declarations: `function files`, `function amdgpu_hdp_generic_flush`, `function amdgpu_hdp_invalidate`, `function amdgpu_hdp_flush`.
- 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.