amdgpu_vram_mgr_vis_size
usage += amdgpu_vram_mgr_vis_size(adev, block);
vis_usage = amdgpu_vram_mgr_vis_size(adev, block);
vis_usage += amdgpu_vram_mgr_vis_size(adev, block);
vis_usage += amdgpu_vram_mgr_vis_size(adev, block);