On Thu, May 14, 2020 at 12:45 AM Daniel Vetter <daniel@xxxxxxxx> wrote: > On Wed, Mar 11, 2020 at 12:20 PM David Stevens <stevensd@xxxxxxxxxxxx> wrote: > > > > This change adds a new dma-buf operation that allows dma-bufs to be used > > by virtio drivers to share exported objects. The new operation allows > > the importing driver to query the exporting driver for the UUID which > > identifies the underlying exported object. > > > > Signed-off-by: David Stevens <stevensd@xxxxxxxxxxxx> > > Adding Tomasz Figa, I've discussed this with him at elce last year I > think. Just to make sure. > > Bunch of things: > - obviously we need the users of this in a few drivers, can't really > review anything stand-alone Here is a link to the usage of this feature by the currently under development virtio-video driver: https://markmail.org/thread/j4xlqaaim266qpks > - adding very specific ops to the generic interface is rather awkward, > eventually everyone wants that and we end up in a mess. I think the > best solution here would be if we create a struct virtio_dma_buf which > subclasses dma-buf, add a (hopefully safe) runtime upcasting > functions, and then a virtio_dma_buf_get_uuid() function. Just storing > the uuid should be doable (assuming this doesn't change during the > lifetime of the buffer), so no need for a callback. So you would prefer a solution similar to the original version of this patchset? https://markmail.org/message/z7if4u56q5fmaok4 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
