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drm/amdgpu: Make amdgpu_vram_mgr_bo_invisible_size always accurate 

Even BOs with AMDGPU_GEM_CREATE_NO_CPU_ACCESS may end up at least
partially in CPU visible VRAM, in particular when all VRAM is visible.

v2:
* Don't take VRAM mgr spinlock, not needed (Christian König)
* Make loop logic simpler and clearer.

Cc: stable@vger.kernel.org
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer 2018-06-14 13:02:07 +02:00 committed by Alex Deucher
parent 5e9244ff58
commit 7303b39e46
1 changed files with 18 additions and 2 deletions
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20
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
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@ -106,10 +106,26 @@ static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
*/
u64 amdgpu_vram_mgr_bo_invisible_size(struct amdgpu_bo *bo)
{
if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_mem_reg *mem = &bo->tbo.mem;
struct drm_mm_node *nodes = mem->mm_node;
unsigned pages = mem->num_pages;
u64 usage = 0;
if (adev->gmc.visible_vram_size == adev->gmc.real_vram_size)
return 0;
if (mem->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
return amdgpu_bo_size(bo);
return 0;
while (nodes && pages) {
usage += nodes->size << PAGE_SHIFT;
usage -= amdgpu_vram_mgr_vis_size(adev, nodes);
pages -= nodes->size;
++nodes;
}
return usage;
}
/**