linux-kernel - [PATCH v3 0/4] Support virtio cross-device resources

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Date:   Wed, 11 Mar 2020 20:20:00 +0900
From:   David Stevens <stevensd@...omium.org>
To:     Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>
Cc:     Daniel Vetter <daniel@...ll.ch>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Stevens <stevensd@...omium.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org,
        virtio-dev@...ts.oasis-open.org
Subject: [PATCH v3 0/4] Support virtio cross-device resources

This patchset implements the current proposal for virtio cross-device
resource sharing [1], with minor changes based on recent comments. It
is expected that this will be used to import virtio resources into the
virtio-video driver currently under discussion [2].

This patchset adds a new hook to dma-buf, for querying the dma-buf's
underlying virtio UUID. This hook is then plumbed through DRM PRIME
buffers, and finally implemented in virtgpu.

[1] https://markmail.org/thread/jsaoqy7phrqdcpqu
[2] https://markmail.org/thread/p5d3k566srtdtute

v2 -> v3 changes:
 - Remove ifdefs.
 - Simplify virtgpu_gem_prime_export as it can only be called once.
 - Use virtio_gpu_vbuffer's objs field instead of abusing data_buf.

David Stevens (4):
  dma-buf: add support for virtio exported objects
  drm/prime: add support for virtio exported objects
  virtio-gpu: add VIRTIO_GPU_F_RESOURCE_UUID feature
  drm/virtio: Support virtgpu exported resources

 drivers/dma-buf/dma-buf.c              | 12 ++++++
 drivers/gpu/drm/drm_prime.c            | 23 +++++++++++
 drivers/gpu/drm/virtio/virtgpu_drv.c   |  3 ++
 drivers/gpu/drm/virtio/virtgpu_drv.h   | 18 +++++++++
 drivers/gpu/drm/virtio/virtgpu_kms.c   |  4 ++
 drivers/gpu/drm/virtio/virtgpu_prime.c | 41 +++++++++++++++++--
 drivers/gpu/drm/virtio/virtgpu_vq.c    | 55 ++++++++++++++++++++++++++
 include/drm/drm_drv.h                  | 10 +++++
 include/linux/dma-buf.h                | 18 +++++++++
 include/uapi/linux/virtio_gpu.h        | 19 +++++++++
 10 files changed, 200 insertions(+), 3 deletions(-)

-- 
2.25.1.481.gfbce0eb801-goog