Gerd Hoffmann
2019-Jul-02 14:18 UTC
[PATCH v6 02/18] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.
Use drm_gem_reservation_object_wait() in virtio_gpu_wait_ioctl(). This also makes the ioctl run lockless. v5: handle lookup failure. v2: use reservation_object_test_signaled_rcu for VIRTGPU_WAIT_NOWAIT. Signed-off-by: Gerd Hoffmann <kraxel at redhat.com> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> --- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 28 ++++++++++++-------------- 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 1b50c34a29dc..c06dde541491 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -464,23 +464,21 @@ static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { struct drm_virtgpu_3d_wait *args = data; - struct drm_gem_object *gobj = NULL; - struct virtio_gpu_object *qobj = NULL; + struct drm_gem_object *obj; + long timeout = 15 * HZ; int ret; - bool nowait = false; - gobj = drm_gem_object_lookup(file, args->handle); - if (gobj == NULL) - return -ENOENT; - - qobj = gem_to_virtio_gpu_obj(gobj); - - if (args->flags & VIRTGPU_WAIT_NOWAIT) - nowait = true; - ret = virtio_gpu_object_wait(qobj, nowait); - - drm_gem_object_put_unlocked(gobj); - return ret; + if (args->flags & VIRTGPU_WAIT_NOWAIT) { + obj = drm_gem_object_lookup(file, args->handle); + if (obj == NULL) + return -ENOENT; + ret = reservation_object_test_signaled_rcu(obj->resv, true); + drm_gem_object_put_unlocked(obj); + return ret ? 0 : -EBUSY; + } + + return drm_gem_reservation_object_wait(file, args->handle, + true, timeout); } static int virtio_gpu_get_caps_ioctl(struct drm_device *dev, -- 2.18.1
Reasonably Related Threads
- [PATCH v5 02/12] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.
- [PATCH v4 02/12] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.
- [PATCH v4 02/12] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.
- [PATCH v2 02/12] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.
- [PATCH v4 02/12] drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.