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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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46
drivers/gpu/drm/virtio/virtgpu_vq.c
View file

@ -548,22 +548,6 @@ void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
static void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
uint32_t resource_id,
struct virtio_gpu_fence *fence)
{
struct virtio_gpu_resource_detach_backing *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING);
cmd_p->resource_id = cpu_to_le32(resource_id);
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);
}
void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
uint32_t scanout_id, uint32_t resource_id,
uint32_t width, uint32_t height,
@ -1158,36 +1142,6 @@ int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
return 0;
}
void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *obj)
{
bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
if (WARN_ON_ONCE(!obj->pages))
return;
if (use_dma_api && obj->mapped) {
struct virtio_gpu_fence *fence = virtio_gpu_fence_alloc(vgdev);
/* detach backing and wait for the host process it ... */
virtio_gpu_cmd_resource_inval_backing(vgdev, obj->hw_res_handle, fence);
dma_fence_wait(&fence->f, true);
dma_fence_put(&fence->f);
/* ... then tear down iommu mappings */
dma_unmap_sg(vgdev->vdev->dev.parent,
obj->pages->sgl, obj->mapped,
DMA_TO_DEVICE);
obj->mapped = 0;
} else {
virtio_gpu_cmd_resource_inval_backing(vgdev, obj->hw_res_handle, NULL);
}
sg_free_table(obj->pages);
obj->pages = NULL;
drm_gem_shmem_unpin(&obj->base.base);
}
void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
struct virtio_gpu_output *output)
{