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@xxxxxxx>
Suggested-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index 256b95232de5..b2033f8352f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -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;
}
--
2.34.1
