diff options
| author | Gurchetan Singh <gurchetansingh@chromium.org> | 2021-11-23 02:22:09 +0300 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2021-11-29 13:46:32 +0300 |
| commit | 7e78781df491e4beb475bac22e6c44236a5002d7 (patch) | |
| tree | 2c1717c4b609d95cfa652348c467de517e2ddee8 /drivers/gpu | |
| parent | e048834c209a02e3776bcc47d43c6d863e3a67ca (diff) | |
| download | linux-7e78781df491e4beb475bac22e6c44236a5002d7.tar.xz | |
drm/virtgpu api: define a dummy fence signaled event
The current virtgpu implementation of poll(..) drops events
when VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK is enabled (otherwise
it's like a normal DRM driver).
This is because paravirtualized userspaces receives responses in a
buffer of type BLOB_MEM_GUEST, not by read(..).
To be in line with other DRM drivers and avoid specialized behavior,
it is possible to define a dummy event for virtgpu. Paravirtualized
userspace will now have to call read(..) on the DRM fd to receive the
dummy event.
Fixes: b10790434cf2 ("drm/virtgpu api: create context init feature")
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20211122232210.602-2-gurchetansingh@google.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_ioctl.c | 2 |
2 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index e0265fe74aa5..0a194aaad419 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -138,7 +138,6 @@ struct virtio_gpu_fence_driver { spinlock_t lock; }; -#define VIRTGPU_EVENT_FENCE_SIGNALED_INTERNAL 0x10000000 struct virtio_gpu_fence_event { struct drm_pending_event base; struct drm_event event; diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 5618a1d5879c..3607646d3229 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -54,7 +54,7 @@ static int virtio_gpu_fence_event_create(struct drm_device *dev, if (!e) return -ENOMEM; - e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED_INTERNAL; + e->event.type = VIRTGPU_EVENT_FENCE_SIGNALED; e->event.length = sizeof(e->event); ret = drm_event_reserve_init(dev, file, &e->base, &e->event); |