[PATCH v1 4/5] drm/virtio: Import prime buffers from other devices as guest blobs

[Dmitry Osipenko]

On 6/24/24 09:43, Vivek Kasireddy wrote:
> +static void virtgpu_dma_buf_move_notify(struct dma_buf_attachment *attach)
> +{
> +	struct drm_gem_object *obj = attach->importer_priv;
> +	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
> +	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
> +
> +	if (bo->created) {
> +		virtio_gpu_cmd_resource_detach_backing(vgdev,
> +						       bo->hw_res_handle);
> +		if (bo->sgt)
> +			dma_buf_unmap_attachment(attach, bo->sgt,
> +						 DMA_BIDIRECTIONAL);
> +
> +		bo->sgt = NULL;
> +	}

BO detachment should be fenced, AFAICT. See
virtio_gpu_detach_object_fenced() in [1] for example.

[1]
https://lore.kernel.org/lkml/20240105184624.508603-1-dmitry.osipenko@collabora.com/T/#me62dca570fdae39c41bdf0867c9908ef62d5cc2e


BTW, for next version please correct the list of emails recipients. I
got only patch 0 in my inbox, for patches 1-5 only Gerd Hoffmann is CC'ed.

-- 
Best regards,
Dmitry