diff options
| author | Gurchetan Singh <[email protected]> | 2021-11-22 15:22:09 -0800 |
|---|---|---|
| committer | Gerd Hoffmann <[email protected]> | 2021-11-29 11:46:32 +0100 |
| commit | 7e78781df491e4beb475bac22e6c44236a5002d7 (patch) | |
| tree | 2c1717c4b609d95cfa652348c467de517e2ddee8 /include/uapi | |
| parent | e048834c209a02e3776bcc47d43c6d863e3a67ca (diff) | |
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 <[email protected]>
Signed-off-by: Gurchetan Singh <[email protected]>
Reviewed-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Gerd Hoffmann <[email protected]>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/drm/virtgpu_drm.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index a13e20cc66b4..0512fde5e697 100644 --- a/include/uapi/drm/virtgpu_drm.h +++ b/include/uapi/drm/virtgpu_drm.h @@ -196,6 +196,13 @@ struct drm_virtgpu_context_init { __u64 ctx_set_params; }; +/* + * Event code that's given when VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK is in + * effect. The event size is sizeof(drm_event), since there is no additional + * payload. + */ +#define VIRTGPU_EVENT_FENCE_SIGNALED 0x90000000 + #define DRM_IOCTL_VIRTGPU_MAP \ DRM_IOWR(DRM_COMMAND_BASE + DRM_VIRTGPU_MAP, struct drm_virtgpu_map) |