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SubjectRe: [RFC][PATCH 5/5 v2] kselftests: Add dma-heap test
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On 3/6/19 9:01 AM, John Stultz wrote:
> On Wed, Mar 6, 2019 at 8:14 AM Benjamin Gaignard
> <benjamin.gaignard@linaro.org> wrote:
>> Le mar. 5 mars 2019 à 21:54, John Stultz <john.stultz@linaro.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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