On Tue, Apr 23, 2019 at 12:55:07PM +0100, Emil Velikov wrote: > On Tue, 23 Apr 2019 at 09:05, Gerd Hoffmann <[email protected]> wrote: > > > > Hi, > > > > > > The DRI3 code extensively uses prime_handle_to_fd and > > > > prime_fd_to_handle for self-import. > > > > The callbacks are not used for self-import. > > > Userspace converts from it's own handles to a dmabuf fd and vice-versa. > I assumed that's called self-import, is it not?
self-import is importing a dma-buf into the driver which created it. drm_gem_prime.c has a shortcut for that, it'll just increase the gem reference count instead of going though a full-blown export/import. The prime_handle_to_fd and prime_fd_to_handle callbacks are only needed for the non-self-import case, where the other driver needs/provides a scatter list. cheers, Gerd _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
