amdgpu_vram_mgr_vis_usage
amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
ui64 = amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man);
amdgpu_vram_mgr_vis_usage(man) >> 20);