On Thursday, March 2nd, 2023 at 14:21, Christian König <christian.koenig@xxxxxxx> wrote: > Am 02.03.23 um 11:14 schrieb Simon Ser: > > > On Thursday, March 2nd, 2023 at 08:11, Christian König christian.koenig@xxxxxxx wrote: > > > > > Am 01.03.23 um 23:29 schrieb Simon Ser: > > > > > > > We don't populate gem_prime_import_sg_table so only DMA-BUFs > > > > exported from our own device can be imported. Still, this is useful > > > > to user-space. > > > > But what happens if one of your BOs is imported into another device? > > > > Is there a way to make this fail, always? > > Well you could return an error from the attach callback if I'm not > completely mistaken. Hmm, but with GEM helpers this is handled by drm_gem_map_attach(). That function calls drm_gem_object_funcs.pin but doesn't pass along the dma_buf_attachment so there no way to reject the attach based on the other device there… Would it be unreasonable to add a drm_driver.gem_prime_attach hook? Or is there a better way to implement this?
