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Date: Fri, 15 Mar 2019 13:07:29 -0700 From: Laura Abbott <labbott@...hat.com> To: John Stultz <john.stultz@...aro.org>, Benjamin Gaignard <benjamin.gaignard@...aro.org> Cc: lkml <linux-kernel@...r.kernel.org>, Greg KH <gregkh@...uxfoundation.org>, Sumit Semwal <sumit.semwal@...aro.org>, Liam Mark <lmark@...eaurora.org>, Brian Starkey <Brian.Starkey@....com>, "Andrew F . Davis" <afd@...com>, Chenbo Feng <fengc@...gle.com>, Alistair Strachan <astrachan@...gle.com>, ML dri-devel <dri-devel@...ts.freedesktop.org> Subject: Re: [RFC][PATCH 5/5 v2] kselftests: Add dma-heap test On 3/6/19 9:01 AM, John Stultz wrote: > On Wed, Mar 6, 2019 at 8:14 AM Benjamin Gaignard > <benjamin.gaignard@...aro.org> wrote: >> Le mar. 5 mars 2019 à 21:54, John Stultz <john.stultz@...aro.org> a écrit : >>> + >>> + 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 > There's the vgem driver in drm. I did some work to clean that up so it could take an import af33a9190d02 ("drm/vgem: Enable dmabuf import interfaces") . I mostly used it for private tests and never ended up upstreaming any of the tests. Thanks, Laura
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