[PATCH v4 0/4] virgl: fence fd support

[Robert Foss <robert.foss@collabora.com>]

This series implements fence support for drm/virtio and
has been tested using qemu, kmscube and the below branches.

Rob Herring solved a reference counting issue and
suggested a context check for the execbuf ioctl, his
changes have been included in the below commits to
keep the tree working at all commits.


The linux series can be found here:
https://gitlab.collabora.com/robertfoss/linux/commits/virtio_fences_v4

As for mesa, the branch can be found here:
https://gitlab.collabora.com/robertfoss/mesa/commits/virtio_fences_v3



Changes since v3:
 - Rebased on drm-misc-next
 - drm/virtio: add virtio_gpu_alloc_fence()
   - Gerd: Clarified and extended commit message
   - Emil: Fixed whitespace issue
   - Emil: Changed label name from fail_fence to fail_backoff
   - Emil: Remove special case for !fence->drv in virtio_gpu_fence_cleanup()
 - drm/virtio: add uapi for in and out explicit fences
   - Emil: Added r-b
   - Emil: Move fence_fd assignment to after sanity checks
 - drm/virtio: add in-fences support for explicit synchronization
   - Move all in_fence handling to the same VIRTGPU_EXECBUF_FENCE_FD_IN block
   - Emil: Make sure to always call dma_fence_put()
   - Emil: Added r-b
 - drm/virtio: add out-fences support for explicit synchronization
   - Emil: Combine with in-fences patch
 -  drm/virtio: bump driver version after explicit synchronization addition
   - Emil: Added r-b

Changes since v2:
 - drm/virtio: add virtio_gpu_alloc_fence()
   - Forward port and fix compilation issues
 - drm/virtio: add uapi for in and out explicit fences
   - Check exbuf->flags for unsupported flags
 - drm/virtio: add in-fences support for explicit synchronization



Gustavo Padovan (1):
  drm/virtio: bump driver version after explicit synchronization
    addition

Robert Foss (3):
  drm/virtio: add virtio_gpu_alloc_fence()
  drm/virtio: add uapi for in and out explicit fences
  drm/virtio: add in/out fence support for explicit synchronization

 drivers/gpu/drm/virtio/virtgpu_drv.h   |   8 +-
 drivers/gpu/drm/virtio/virtgpu_fence.c |  29 +++++--
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 108 +++++++++++++++++++++----
 drivers/gpu/drm/virtio/virtgpu_plane.c |  46 +++++++++--
 drivers/gpu/drm/virtio/virtgpu_vq.c    |   2 +-
 include/uapi/drm/virtgpu_drm.h         |  13 ++-
 6 files changed, 173 insertions(+), 33 deletions(-)

-- 
2.17.1