[v1,0/1] Add sync object UAPI support to VirtIO-GPU driver

Message

Dmitry Osipenko Jan. 19, 2023, 12:41 a.m. UTC

We have multiple Vulkan context types that are awaiting for the addition
of the sync object DRM UAPI support to the VirtIO-GPU kernel driver:

 1. Venus context
 2. Native contexts (virtio-freedreno, virtio-intel, virtio-amdgpu)

Mesa core supports DRM sync object UAPI, providing Vulkan drivers with a
generic fencing implementation that we want to utilize.

This patch adds initial sync objects support. It creates fundament for a
further fencing improvements. Later on we will want to extend the VirtIO-GPU
fencing API with passing fence IDs to host for waiting, it will be a new
additional VirtIO-GPU IOCTL and more. Today we have several VirtIO-GPU context
drivers in works that require VirtIO-GPU to support sync objects UAPI.

The patch is heavily inspired by the sync object UAPI implementation of the
MSM driver.

Dmitry Osipenko (1):
  drm/virtio: Support sync objects

 drivers/gpu/drm/virtio/virtgpu_drv.c   |   3 +-
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 223 ++++++++++++++++++++++++-
 include/uapi/drm/virtgpu_drm.h         |  16 +-
 3 files changed, 239 insertions(+), 3 deletions(-)