Re: [RFC][PATCH 5/5 v2] kselftests: Add dma-heap test

[John Stultz]

On Wed, Mar 6, 2019 at 8:14 AM Benjamin Gaignard
<benjamin.gaignard@xxxxxxxxxx> wrote:
> Le mar. 5 mars 2019 Ã 21:54, John Stultz <john.stultz@xxxxxxxxxx> a Ãcrit :
> > +
> > +       printf("Allocating 1 MEG\n");
> > +       ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
> > +       if (ret)
> > +               goto out;
> > +
> > +       /* DO SOMETHING WITH THE DMABUF HERE? */
>
> You can do a call to mmap and write a pattern in the buffer.

Yea. I can also do some invalid allocations to make sure things fail properly.

But I was talking a bit w/ Sumit about the lack of any general dmabuf
tests, and am curious if we need to have a importer device driver that
can validate its a real dmabuf and exercise more of the dmabuf ops.

thanks
-john