drm/amdgpu: use the TTM dummy page instead of allocating one
We have a global dummy page in TTM, use that one instead of allocating a
new one.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index 008eaee..137145d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -68,17 +68,15 @@
*/
static int amdgpu_gart_dummy_page_init(struct amdgpu_device *adev)
{
- if (adev->dummy_page.page)
+ struct page *dummy_page = adev->mman.bdev.glob->dummy_read_page;
+
+ if (adev->dummy_page_addr)
return 0;
- adev->dummy_page.page = alloc_page(GFP_DMA32 | GFP_KERNEL | __GFP_ZERO);
- if (adev->dummy_page.page == NULL)
- return -ENOMEM;
- adev->dummy_page.addr = pci_map_page(adev->pdev, adev->dummy_page.page,
- 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
- if (pci_dma_mapping_error(adev->pdev, adev->dummy_page.addr)) {
+ adev->dummy_page_addr = pci_map_page(adev->pdev, dummy_page, 0,
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ if (pci_dma_mapping_error(adev->pdev, adev->dummy_page_addr)) {
dev_err(&adev->pdev->dev, "Failed to DMA MAP the dummy page\n");
- __free_page(adev->dummy_page.page);
- adev->dummy_page.page = NULL;
+ adev->dummy_page_addr = 0;
return -ENOMEM;
}
return 0;
@@ -93,12 +91,11 @@ static int amdgpu_gart_dummy_page_init(struct amdgpu_device *adev)
*/
static void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
{
- if (adev->dummy_page.page == NULL)
+ if (!adev->dummy_page_addr)
return;
- pci_unmap_page(adev->pdev, adev->dummy_page.addr,
- PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
- __free_page(adev->dummy_page.page);
- adev->dummy_page.page = NULL;
+ pci_unmap_page(adev->pdev, adev->dummy_page_addr,
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ adev->dummy_page_addr = 0;
}
/**
@@ -236,7 +233,7 @@ int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
adev->gart.pages[p] = NULL;
#endif
- page_base = adev->dummy_page.addr;
+ page_base = adev->dummy_page_addr;
if (!adev->gart.ptr)
continue;
@@ -347,7 +344,7 @@ int amdgpu_gart_init(struct amdgpu_device *adev)
{
int r;
- if (adev->dummy_page.page)
+ if (adev->dummy_page_addr)
return 0;
/* We need PAGE_SIZE >= AMDGPU_GPU_PAGE_SIZE */