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

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Message-Id: <20230119004143.968942-1-dmitry.osipenko@collabora.com>
Date:   Thu, 19 Jan 2023 03:41:42 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     David Airlie <airlied@...hat.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Rob Clark <robdclark@...il.com>,
        Marek Olšák <maraeo@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com, virtualization@...ts.linux-foundation.org
Subject: [PATCH v1 0/1] Add sync object UAPI support to VirtIO-GPU driver

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(-)

-- 
2.39.0