LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Rob Clark <robdclark@gmail.com>
To: "Rob Clark" <robdclark@gmail.com>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	"moderated list:DMA BUFFER SHARING FRAMEWORK"
	<linaro-mm-sig@lists.linaro.org>,
	"Christian König" <ckoenig.leichtzumerken@gmail.com>,
	"Michel Dänzer" <michel@daenzer.net>,
	"Pekka Paalanen" <ppaalanen@gmail.com>,
	"Rob Clark" <robdclark@chromium.org>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	"Gustavo Padovan" <gustavo@padovan.org>,
	"Christian König" <christian.koenig@amd.com>,
	"open list:SYNC FILE FRAMEWORK" <linux-media@vger.kernel.org>,
	"open list" <linux-kernel@vger.kernel.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH v3 7/9] dma-buf/fence-chain: Add fence deadline support
Date: Wed, 8 Sep 2021 11:19:15 -0700	[thread overview]
Message-ID: <CAF6AEGs3DhSKhDkft58VqkM6GwMMSq87GZkQAaPf_LLavDdacA@mail.gmail.com> (raw)
In-Reply-To: <YTj4yPk1YuFk3oeL@phenom.ffwll.local>

On Wed, Sep 8, 2021 at 10:54 AM Daniel Vetter <daniel@ffwll.ch> wrote:
>
> On Fri, Sep 03, 2021 at 11:47:58AM -0700, Rob Clark wrote:
> > From: Rob Clark <robdclark@chromium.org>
> >
> > Signed-off-by: Rob Clark <robdclark@chromium.org>
> > ---
> >  drivers/dma-buf/dma-fence-chain.c | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> >
> > diff --git a/drivers/dma-buf/dma-fence-chain.c b/drivers/dma-buf/dma-fence-chain.c
> > index 1b4cb3e5cec9..736a9ad3ea6d 100644
> > --- a/drivers/dma-buf/dma-fence-chain.c
> > +++ b/drivers/dma-buf/dma-fence-chain.c
> > @@ -208,6 +208,18 @@ static void dma_fence_chain_release(struct dma_fence *fence)
> >       dma_fence_free(fence);
> >  }
> >
> > +
> > +static void dma_fence_chain_set_deadline(struct dma_fence *fence,
> > +                                      ktime_t deadline)
> > +{
> > +     dma_fence_chain_for_each(fence, fence) {
> > +             struct dma_fence_chain *chain = to_dma_fence_chain(fence);
> > +             struct dma_fence *f = chain ? chain->fence : fence;
>
> Doesn't this just end up calling set_deadline on a chain, potenetially
> resulting in recursion? Also I don't think this should ever happen, why
> did you add that?

Tbh the fence-chain was the part I was a bit fuzzy about, and the main
reason I added igt tests.  The iteration is similar to how, for ex,
dma_fence_chain_signaled() work, and according to the igt test it does
what was intended

BR,
-R

> -Daniel
>
> > +
> > +             dma_fence_set_deadline(f, deadline);
> > +     }
> > +}
> > +
> >  const struct dma_fence_ops dma_fence_chain_ops = {
> >       .use_64bit_seqno = true,
> >       .get_driver_name = dma_fence_chain_get_driver_name,
> > @@ -215,6 +227,7 @@ const struct dma_fence_ops dma_fence_chain_ops = {
> >       .enable_signaling = dma_fence_chain_enable_signaling,
> >       .signaled = dma_fence_chain_signaled,
> >       .release = dma_fence_chain_release,
> > +     .set_deadline = dma_fence_chain_set_deadline,
> >  };
> >  EXPORT_SYMBOL(dma_fence_chain_ops);
> >
> > --
> > 2.31.1
> >
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

  reply	other threads:[~2021-09-08 18:15 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-03 18:47 [PATCH v3 0/9] dma-fence: Deadline awareness Rob Clark
2021-09-03 18:47 ` [PATCH v3 1/9] dma-fence: Add deadline awareness Rob Clark
2021-09-08 17:55   ` Daniel Vetter
2021-09-03 18:47 ` [PATCH v3 2/9] drm/vblank: Add helper to get next vblank time Rob Clark
2021-09-03 18:47 ` [PATCH v3 3/9] drm/atomic-helper: Set fence deadline for vblank Rob Clark
2021-09-03 18:47 ` [PATCH v3 4/9] drm/scheduler: Add fence deadline support Rob Clark
2021-09-08 17:45   ` Daniel Vetter
2021-09-09  6:22     ` Christian König
2021-09-14 13:38       ` Daniel Vetter
2021-09-21 15:57     ` Rob Clark
2021-09-21 16:35       ` Rob Clark
2021-09-21 16:45         ` Christian König
2021-09-21 20:09   ` Andrey Grodzovsky
2021-09-21 20:47     ` Rob Clark
2021-09-22  2:18       ` Andrey Grodzovsky
2021-09-22  3:32         ` Rob Clark
2021-09-22 14:31           ` Andrey Grodzovsky
2021-09-22 15:01             ` Rob Clark
2021-09-03 18:47 ` [PATCH v3 5/9] drm/msm: Add deadline based boost support Rob Clark
2021-09-08 17:48   ` Daniel Vetter
2021-09-08 17:57     ` Rob Clark
2021-09-03 18:47 ` [PATCH v3 6/9] dma-buf/fence-array: Add fence deadline support Rob Clark
2021-09-08 18:00   ` Daniel Vetter
2021-09-09  6:55     ` Christian König
2021-09-03 18:47 ` [PATCH v3 7/9] dma-buf/fence-chain: " Rob Clark
2021-09-08 17:54   ` Daniel Vetter
2021-09-08 18:19     ` Rob Clark [this message]
2021-09-08 18:45       ` Daniel Vetter
2021-09-09  6:31         ` Christian König
2021-09-03 18:47 ` [PATCH v3 8/9] dma-buf/sync_file: Add SET_DEADLINE ioctl Rob Clark
2021-09-08 17:50   ` Daniel Vetter
2021-09-08 18:23     ` Rob Clark
2021-09-08 18:49       ` Daniel Vetter
2021-09-08 19:40         ` Rob Clark
2021-09-08 21:10           ` Daniel Vetter
2021-09-21 18:08             ` Rob Clark
2021-09-27  8:42   ` Pekka Paalanen
2021-09-27  8:53     ` Christian König
2021-09-27 14:36     ` Rob Clark
2021-09-28  7:57       ` Pekka Paalanen
2021-09-03 18:48 ` [PATCH v3 9/9] dma-buf/sw_sync: Add fence deadline support Rob Clark
2021-09-09 16:16 ` [PATCH v3 0/9] dma-fence: Deadline awareness Simon Ser
2021-09-09 16:35   ` Rob Clark
2021-09-09 16:42     ` Simon Ser
2021-09-09 17:08       ` Rob Clark

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAF6AEGs3DhSKhDkft58VqkM6GwMMSq87GZkQAaPf_LLavDdacA@mail.gmail.com \
    --to=robdclark@gmail.com \
    --cc=christian.koenig@amd.com \
    --cc=ckoenig.leichtzumerken@gmail.com \
    --cc=daniel@ffwll.ch \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=gustavo@padovan.org \
    --cc=linaro-mm-sig@lists.linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=michel@daenzer.net \
    --cc=ppaalanen@gmail.com \
    --cc=robdclark@chromium.org \
    --cc=sumit.semwal@linaro.org \
    --subject='Re: [PATCH v3 7/9] dma-buf/fence-chain: Add fence deadline support' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).