From: Prike Liang Date: Thu, 24 Oct 2024 08:51:05 +0000 (+0800) Subject: drm/amdgpu: Fix dummy_read_page overlapping mappings X-Git-Tag: microblaze-v6.16~490^2~9^2~17 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=b78612939de33ffd247f3d39eaca7fb2648801ba;p=linux-2.6-microblaze.git drm/amdgpu: Fix dummy_read_page overlapping mappings 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 Suggested-by: Christian König Reviewed-by: Christian König Signed-off-by: Alex Deucher --- 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; }