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.

Dependency Surface

Detected Declarations

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

Implementation Notes