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drm/amdgpu: Added a few comments for gart

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Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Christian Konig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Oak Zeng 2018-10-23 22:58:04 -04:00 committed by Alex Deucher
parent afd545f673
commit 5dcb668d9a
2 changed files with 3 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
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@ -259,6 +259,8 @@ int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
* @offset: offset into the GPU's gart aperture
* @pages: number of pages to bind
* @dma_addr: DMA addresses of pages
* @flags: page table entry flags
* @dst: CPU address of the gart table
*
* Map the dma_addresses into GART entries (all asics).
* Returns 0 for success, -EINVAL for failure.

1
drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
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@ -41,6 +41,7 @@ struct amdgpu_bo;
struct amdgpu_gart {
struct amdgpu_bo *bo;
/* CPU kmapped address of gart table */
void *ptr;
unsigned num_gpu_pages;
unsigned num_cpu_pages;