Re: [PATCH 3/4] drm/msm: Use dma_resv locking wrappers

From: Eric Anholt <eric@anholt.net>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: DRI Development <dri-devel@lists.freedesktop.org>,
	freedreno@lists.freedesktop.org,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	linux-arm-msm@vger.kernel.org,
	Daniel Vetter <daniel.vetter@intel.com>,
	Sean Paul <sean@poorly.run>
Subject: Re: [PATCH 3/4] drm/msm: Use dma_resv locking wrappers
Date: Fri, 13 Dec 2019 13:43:30 -0800	[thread overview]
Message-ID: <CADaigPXxgiWSd20BkVFXXxcqDrwY0yGmqgQM+0G0X0mob8nt8g@mail.gmail.com> (raw)
In-Reply-To: <20191213200848.GL624164@phenom.ffwll.local>

On Fri, Dec 13, 2019 at 12:08 PM Daniel Vetter <daniel@ffwll.ch> wrote:
>
> On Mon, Nov 25, 2019 at 10:43:55AM +0100, Daniel Vetter wrote:
> > I'll add more fancy logic to them soon, so everyone really has to use
> > them. Plus they already provide some nice additional debug
> > infrastructure on top of direct ww_mutex usage for the fences tracked
> > by dma_resv.
> >
> > 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
>
> Ping for some review/acks.
>
> Thanks, Daniel
>
> > ---
> >  drivers/gpu/drm/msm/msm_gem_submit.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
> > index 7d04c47d0023..385d4965a8d0 100644
> > --- a/drivers/gpu/drm/msm/msm_gem_submit.c
> > +++ b/drivers/gpu/drm/msm/msm_gem_submit.c
> > @@ -157,7 +157,7 @@ static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
> >               msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
> >
> >       if (submit->bos[i].flags & BO_LOCKED)
> > -             ww_mutex_unlock(&msm_obj->base.resv->lock);
> > +             dma_resv_unlock(msm_obj->base.resv);
> >
> >       if (backoff && !(submit->bos[i].flags & BO_VALID))
> >               submit->bos[i].iova = 0;
> > @@ -180,8 +180,8 @@ static int submit_lock_objects(struct msm_gem_submit *submit)
> >               contended = i;
> >
> >               if (!(submit->bos[i].flags & BO_LOCKED)) {
> > -                     ret = ww_mutex_lock_interruptible(&msm_obj->base.resv->lock,
> > -                                     &submit->ticket);
> > +                     ret = dma_resv_lock_interruptible(msm_obj->base.resv,
> > +                                                       &submit->ticket);
> >                       if (ret)
> >                               goto fail;
> >                       submit->bos[i].flags |= BO_LOCKED;
> > @@ -202,8 +202,8 @@ static int submit_lock_objects(struct msm_gem_submit *submit)
> >       if (ret == -EDEADLK) {
> >               struct msm_gem_object *msm_obj = submit->bos[contended].obj;
> >               /* we lost out in a seqno race, lock and retry.. */
> > -             ret = ww_mutex_lock_slow_interruptible(&msm_obj->base.resv->lock,
> > -                             &submit->ticket);
> > +             ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
> > +                                                    &submit->ticket);
> >               if (!ret) {
> >                       submit->bos[contended].flags |= BO_LOCKED;
> >                       slow_locked = contended;
> > --
> > 2.24.0
> >

Reviewed-by: Eric Anholt <eric@anholt.net>