On Tue, Mar 14, 2017 at 01:30:30PM -0700, Laura Abbott wrote: > On 03/14/2017 01:13 PM, Daniel Vetter wrote: > > On Tue, Mar 14, 2017 at 01:04:19PM -0700, Laura Abbott wrote: > >> > >> dma-buf is designed to share buffers. Sharing means that there needs to > >> be another subsystem to accept those buffers. Introduce a simple test > >> module to act as a dummy system to accept dma_bufs from elsewhere. The > >> goal is to provide a very simple interface to validate exported buffers > >> do something reasonable. This is based on ion_test.c that existed for > >> the Ion framework. > >> > >> Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx> > >> --- > >> This is basically a drop in of what was available as > >> drivers/staging/android/ion/ion_test.c. Given it has no Ion specific > >> parts it might be useful as a more general test module. RFC mostly > >> to see if this is generally useful or not. > > > > We already have a test dma-buf driver, which also handles reservation > > objects and can create fences to provoke signalling races an all kinds of > > other fun. It's drivers/gpu/drm/vgem. > > > > If there's anything missing in there, patches very much welcome. > > -Daniel > > > > Thanks for that pointer. It certainly looks more complete vs. allocating > a platform_device. I'll look and see if there's anything that needs > extension. Plus this means I can probably delete more code from Ion (woo) \o/ for less code! btw for the tests, I think we should really hard to either get them into kselftests or igt. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
