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drm/virtio: add virtio_gpu_alloc_fence()

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Refactor fence creation, add fences to relevant GPU
operations and add cursor helper functions.

This removes the potential for allocation failures from the
cmd_submit and atomic_commit paths.
Now a fence will be allocated first and only after that
will we proceed with the rest of the execution.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20181112165157.32765-2-robert.foss@collabora.com
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Robert Foss
2018-11-12 17:51:54 +01:00
committed by Gerd Hoffmann
parent 2ae7f165c0
commit 9fdd90c0f4
5 changed files with 96 additions and 15 deletions
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2
drivers/gpu/drm/virtio/virtgpu_vq.c
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@@ -896,9 +896,9 @@ 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);
struct virtio_gpu_fence *fence;
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);