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drm/virtio: move mapping teardown to virtio_gpu_cleanup_object()

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Stop sending DETACH_BACKING commands, that will happening anyway when
releasing resources via UNREF.  Handle guest-side cleanup in
virtio_gpu_cleanup_object(), called when the host finished processing
the UNREF command.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200207074638.26386-4-kraxel@redhat.com
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
This commit is contained in:
Gerd Hoffmann 2020-02-07 08:46:37 +01:00
parent 1ed5f698ad
commit 2fe4ca9d0e
3 changed files with 12 additions and 50 deletions
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14
drivers/gpu/drm/virtio/virtgpu_object.c
View file

@ -23,6 +23,7 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <linux/dma-mapping.h>
#include <linux/moduleparam.h>
#include "virtgpu_drv.h"
@ -65,6 +66,17 @@ void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
{
struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
if (bo->pages) {
if (bo->mapped) {
dma_unmap_sg(vgdev->vdev->dev.parent,
bo->pages->sgl, bo->mapped,
DMA_TO_DEVICE);
bo->mapped = 0;
}
sg_free_table(bo->pages);
bo->pages = NULL;
drm_gem_shmem_unpin(&bo->base.base);
}
virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
drm_gem_shmem_free_object(&bo->base.base);
}
@ -74,8 +86,6 @@ static void virtio_gpu_free_object(struct drm_gem_object *obj)
struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
if (bo->pages)
virtio_gpu_object_detach(vgdev, bo);
if (bo->created) {
virtio_gpu_cmd_unref_resource(vgdev, bo);
/* completion handler calls virtio_gpu_cleanup_object() */