On Fri, 2017-08-18 at 18:21 +0800, Tina Zhang wrote: > +/** > + * VFIO_DEVICE_QUERY_GFX_PLANE - _IOW(VFIO_TYPE, VFIO_BASE + 14, > struct vfio_device_query_gfx_plane) > + * > + * Set the drm_plane_type and flags, then retrieve information about > the gfx plane. > + * > + * flags: > + * VFIO_GFX_PLANE_TYPE_PROBE and VFIO_GFX_PLANE_TYPE_DMABUF are > set to ask if the mdev > + * supports dma-buf. 0 on support, -EINVAL on no support for > dma-buf. > + * VFIO_GFX_PLANE_TYPE_PROBE and VFIO_GFX_PLANE_TYPE_REGION are > set to ask if the mdev > + * supports region. 0 on support, -EINVAL on no support for > region. > + * VFIO_GFX_PLANE_TYPE_DMABUF or VFIO_GFX_PLANE_TYPE_REGION is > set with each call to > + * query the plane info. > + * Others are invalid and return -EINVAL. > + * > + * Return: 0 on success, -ENODEV with all out fields zero on mdev > device initialization, Do you mean PROBE calls here? The behavior in case the guest driver hasn't yet initialized the plane should be documented here too. cheers, Gerd _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
