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drm/amdgpu: Fix dummy_read_page overlapping mappings

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Use the dma_map_page_attrs() with DMA_ATTR_SKIP_CPU_SYNC
attribute setting to handle the dummy page overlapping
mappings.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Prike Liang 2024-10-24 16:51:05 +08:00 committed by Alex Deucher
parent afe260df55
commit b78612939d
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
View File

@ -78,8 +78,9 @@ static int amdgpu_gart_dummy_page_init(struct amdgpu_device *adev)
if (adev->dummy_page_addr)
return 0;
adev->dummy_page_addr = dma_map_page(&adev->pdev->dev, dummy_page, 0,
PAGE_SIZE, DMA_BIDIRECTIONAL);
adev->dummy_page_addr = dma_map_page_attrs(&adev->pdev->dev, dummy_page, 0,
PAGE_SIZE, DMA_BIDIRECTIONAL,
DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(&adev->pdev->dev, adev->dummy_page_addr)) {
dev_err(&adev->pdev->dev, "Failed to DMA MAP the dummy page\n");
adev->dummy_page_addr = 0;
@ -99,8 +100,9 @@ void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
{
if (!adev->dummy_page_addr)
return;
dma_unmap_page(&adev->pdev->dev, adev->dummy_page_addr, PAGE_SIZE,
DMA_BIDIRECTIONAL);
dma_unmap_page_attrs(&adev->pdev->dev, adev->dummy_page_addr, PAGE_SIZE,
DMA_BIDIRECTIONAL,
DMA_ATTR_SKIP_CPU_SYNC);
adev->dummy_page_addr = 0;
}