From: Rob Clark <robdclark@gmail.com> To: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: DRI Development <dri-devel@lists.freedesktop.org>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Lucas Stach <l.stach@pengutronix.de>, Daniel Vetter <daniel.vetter@intel.com>, Sean Paul <sean@poorly.run>, linux-arm-msm <linux-arm-msm@vger.kernel.org>, freedreno <freedreno@lists.freedesktop.org> Subject: Re: [PATCH v5 16/20] drm/msm: Don't break exclusive fence ordering Date: Thu, 26 Aug 2021 09:16:25 -0700 [thread overview] Message-ID: <CAF6AEGtSM_TfCKvHh48WFX4DvhdrWLLi3oCMPz1x2_pCZwbPCQ@mail.gmail.com> (raw) In-Reply-To: <20210805104705.862416-17-daniel.vetter@ffwll.ch> On Thu, Aug 5, 2021 at 3:47 AM Daniel Vetter <daniel.vetter@ffwll.ch> wrote: > > There's only one exclusive slot, and we must not break the ordering. > > Adding a new exclusive fence drops all previous fences from the > dma_resv. To avoid violating the signalling order we err on the side of > over-synchronizing by waiting for the existing fences, even if > userspace asked us to ignore them. > > A better fix would be to us a dma_fence_chain or _array like e.g. > amdgpu now uses, but > - msm has a synchronous dma_fence_wait for anything from another > context, so doesn't seem to care much, > - and it probably makes sense to lift this into dma-resv.c code as a > proper concept, so that drivers don't have to hack up their own > solution each on their own. > > v2: Improve commit message per Lucas' suggestion. > > Cc: Lucas Stach <l.stach@pengutronix.de> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> > Cc: Rob Clark <robdclark@gmail.com> > Cc: Sean Paul <sean@poorly.run> > Cc: linux-arm-msm@vger.kernel.org > Cc: freedreno@lists.freedesktop.org a-b > --- > drivers/gpu/drm/msm/msm_gem_submit.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c > index fb5a2eab27a2..66633dfd58a2 100644 > --- a/drivers/gpu/drm/msm/msm_gem_submit.c > +++ b/drivers/gpu/drm/msm/msm_gem_submit.c > @@ -330,7 +330,8 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit) > return ret; > } > > - if (no_implicit) > + /* exclusive fences must be ordered */ > + if (no_implicit && !write) > continue; > > ret = drm_sched_job_add_implicit_dependencies(&submit->base, > -- > 2.32.0 >
WARNING: multiple messages have this Message-ID (diff)
From: Rob Clark <robdclark@gmail.com> To: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: DRI Development <dri-devel@lists.freedesktop.org>, Intel Graphics Development <intel-gfx@lists.freedesktop.org>, Lucas Stach <l.stach@pengutronix.de>, Daniel Vetter <daniel.vetter@intel.com>, Sean Paul <sean@poorly.run>, linux-arm-msm <linux-arm-msm@vger.kernel.org>, freedreno <freedreno@lists.freedesktop.org> Subject: Re: [Intel-gfx] [PATCH v5 16/20] drm/msm: Don't break exclusive fence ordering Date: Thu, 26 Aug 2021 09:16:25 -0700 [thread overview] Message-ID: <CAF6AEGtSM_TfCKvHh48WFX4DvhdrWLLi3oCMPz1x2_pCZwbPCQ@mail.gmail.com> (raw) In-Reply-To: <20210805104705.862416-17-daniel.vetter@ffwll.ch> On Thu, Aug 5, 2021 at 3:47 AM Daniel Vetter <daniel.vetter@ffwll.ch> wrote: > > There's only one exclusive slot, and we must not break the ordering. > > Adding a new exclusive fence drops all previous fences from the > dma_resv. To avoid violating the signalling order we err on the side of > over-synchronizing by waiting for the existing fences, even if > userspace asked us to ignore them. > > A better fix would be to us a dma_fence_chain or _array like e.g. > amdgpu now uses, but > - msm has a synchronous dma_fence_wait for anything from another > context, so doesn't seem to care much, > - and it probably makes sense to lift this into dma-resv.c code as a > proper concept, so that drivers don't have to hack up their own > solution each on their own. > > v2: Improve commit message per Lucas' suggestion. > > Cc: Lucas Stach <l.stach@pengutronix.de> > Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> > Cc: Rob Clark <robdclark@gmail.com> > Cc: Sean Paul <sean@poorly.run> > Cc: linux-arm-msm@vger.kernel.org > Cc: freedreno@lists.freedesktop.org a-b > --- > drivers/gpu/drm/msm/msm_gem_submit.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c > index fb5a2eab27a2..66633dfd58a2 100644 > --- a/drivers/gpu/drm/msm/msm_gem_submit.c > +++ b/drivers/gpu/drm/msm/msm_gem_submit.c > @@ -330,7 +330,8 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit) > return ret; > } > > - if (no_implicit) > + /* exclusive fences must be ordered */ > + if (no_implicit && !write) > continue; > > ret = drm_sched_job_add_implicit_dependencies(&submit->base, > -- > 2.32.0 >
next prev parent reply other threads:[~2021-08-26 16:12 UTC|newest] Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-05 10:46 [PATCH v5 00/20] drm/sched dependency handling and implicit sync fixes Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 01/20] drm/sched: Split drm_sched_job_init Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:43 ` Christian König 2021-08-05 13:43 ` [Intel-gfx] " Christian König 2021-08-05 14:07 ` Daniel Vetter 2021-08-05 14:07 ` [Intel-gfx] " Daniel Vetter 2021-08-05 14:47 ` Christian König 2021-08-05 14:47 ` [Intel-gfx] " Christian König 2021-08-05 15:07 ` Daniel Vetter 2021-08-05 15:07 ` [Intel-gfx] " Daniel Vetter 2021-08-17 8:49 ` [PATCH] " Daniel Vetter 2021-08-17 8:49 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 02/20] drm/msm: Fix drm/sched point of no return rules Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 23:02 ` Rob Clark 2021-08-05 23:02 ` [Intel-gfx] " Rob Clark 2021-08-06 16:41 ` Daniel Vetter 2021-08-06 16:41 ` [Intel-gfx] " Daniel Vetter 2021-08-06 17:19 ` Rob Clark 2021-08-06 17:19 ` [Intel-gfx] " Rob Clark 2021-08-06 18:41 ` Daniel Vetter 2021-08-06 18:41 ` [Intel-gfx] " Daniel Vetter 2021-08-06 19:01 ` Rob Clark 2021-08-06 19:01 ` [Intel-gfx] " Rob Clark 2021-08-06 19:10 ` Daniel Vetter 2021-08-06 19:10 ` [Intel-gfx] " Daniel Vetter 2021-08-06 19:59 ` Rob Clark 2021-08-06 19:59 ` [Intel-gfx] " Rob Clark 2021-08-17 8:53 ` [PATCH] drm/msm: Improve " Daniel Vetter 2021-08-17 8:53 ` [Intel-gfx] " Daniel Vetter 2021-08-26 9:33 ` Daniel Vetter 2021-08-26 9:33 ` [Intel-gfx] " Daniel Vetter 2021-08-26 15:38 ` Rob Clark 2021-08-26 15:38 ` Rob Clark 2021-08-05 10:46 ` [PATCH v5 03/20] drm/sched: Barriers are needed for entity->last_scheduled Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:45 ` Christian König 2021-08-05 13:45 ` [Intel-gfx] " Christian König 2021-08-05 10:46 ` [PATCH v5 04/20] drm/sched: Add dependency tracking Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:47 ` Christian König 2021-08-05 13:47 ` [Intel-gfx] " Christian König 2021-08-05 10:46 ` [PATCH v5 05/20] drm/sched: drop entity parameter from drm_sched_push_job Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:48 ` Christian König 2021-08-05 13:48 ` [Intel-gfx] " Christian König 2021-08-05 10:46 ` [PATCH v5 06/20] drm/sched: improve docs around drm_sched_entity Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 07/20] drm/panfrost: use scheduler dependency tracking Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 15:10 ` Alyssa Rosenzweig 2021-08-05 15:10 ` [Intel-gfx] " Alyssa Rosenzweig 2021-08-05 10:46 ` [PATCH v5 08/20] drm/lima: " Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-12 19:28 ` Daniel Vetter 2021-08-12 19:28 ` [Intel-gfx] " Daniel Vetter 2021-08-14 2:45 ` Qiang Yu 2021-08-14 2:45 ` [Intel-gfx] " Qiang Yu 2021-08-05 10:46 ` [PATCH v5 09/20] drm/v3d: Move drm_sched_job_init to v3d_job_init Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 10/20] drm/v3d: Use scheduler dependency handling Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 11/20] drm/etnaviv: " Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-12 19:28 ` Daniel Vetter 2021-08-12 19:28 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 12/20] drm/msm: " Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-12 19:29 ` Daniel Vetter 2021-08-12 19:29 ` [Intel-gfx] " Daniel Vetter 2021-08-26 16:12 ` Rob Clark 2021-08-26 16:12 ` [Intel-gfx] " Rob Clark 2021-08-30 9:01 ` Daniel Vetter 2021-08-30 9:01 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 13/20] drm/gem: Delete gem array fencing helpers Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-12 19:29 ` Daniel Vetter 2021-08-12 19:29 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:46 ` [PATCH v5 14/20] drm/sched: Don't store self-dependencies Daniel Vetter 2021-08-05 10:46 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:18 ` Christian König 2021-08-05 13:18 ` [Intel-gfx] " Christian König 2021-08-05 13:25 ` Daniel Vetter 2021-08-05 13:25 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:57 ` Christian König 2021-08-05 13:57 ` [Intel-gfx] " Christian König 2021-08-05 15:06 ` Daniel Vetter 2021-08-05 15:06 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 15/20] drm/sched: Check locking in drm_sched_job_await_implicit Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:19 ` Christian König 2021-08-05 13:19 ` [Intel-gfx] " Christian König 2021-08-05 13:27 ` Daniel Vetter 2021-08-05 13:27 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 16/20] drm/msm: Don't break exclusive fence ordering Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-26 16:16 ` Rob Clark [this message] 2021-08-26 16:16 ` Rob Clark 2021-08-26 16:16 ` Rob Clark 2021-08-30 9:02 ` Daniel Vetter 2021-08-30 9:02 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 17/20] drm/etnaviv: " Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 18/20] drm/i915: delete exclude argument from i915_sw_fence_await_reservation Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 19/20] drm/i915: Don't break exclusive fence ordering Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-05 10:47 ` [PATCH v5 20/20] dma-resv: Give the docs a do-over Daniel Vetter 2021-08-05 10:47 ` [Intel-gfx] " Daniel Vetter 2021-08-30 19:38 ` Daniel Vetter 2021-08-30 19:38 ` [Intel-gfx] " Daniel Vetter 2021-08-05 13:58 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/sched dependency handling and implicit sync fixes Patchwork 2021-08-05 14:29 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork 2021-08-06 19:14 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/sched dependency handling and implicit sync fixes (rev2) Patchwork 2021-08-17 16:27 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/sched dependency handling and implicit sync fixes (rev4) Patchwork 2021-08-17 16:57 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork 2021-08-17 18:15 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork 2021-08-26 13:17 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/sched dependency handling and implicit sync fixes (rev5) Patchwork 2021-08-26 13:48 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork 2021-08-26 21:46 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
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