[Lima] [PATCH v5 08/20] drm/lima: use scheduler dependency tracking

[Qiang Yu]

Thanks for the remind, indeed miss a lock. Patch is:
Reviewed-by: Qiang Yu <yuq825 at gmail.com>

Regards,
Qiang

On Fri, Aug 13, 2021 at 3:28 AM Daniel Vetter <daniel at ffwll.ch> wrote:
>
> On Thu, Aug 05, 2021 at 12:46:53PM +0200, Daniel Vetter wrote:
> > Nothing special going on here.
> >
> > Aside reviewing the code, it seems like drm_sched_job_arm() should be
> > moved into lima_sched_context_queue_task and put under some mutex
> > together with drm_sched_push_job(). See the kerneldoc for
> > drm_sched_push_job().
> >
> > v2: Rebase over renamed functions to add dependencies.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > Cc: Qiang Yu <yuq825 at gmail.com>
> > Cc: Sumit Semwal <sumit.semwal at linaro.org>
> > Cc: "Christian König" <christian.koenig at amd.com>
> > Cc: lima at lists.freedesktop.org
> > Cc: linux-media at vger.kernel.org
> > Cc: linaro-mm-sig at lists.linaro.org
>
> Ping for an ack here please. Testing would be even better ofc.
> -Daniel
>
> > ---
> >  drivers/gpu/drm/lima/lima_gem.c   |  6 ++++--
> >  drivers/gpu/drm/lima/lima_sched.c | 21 ---------------------
> >  drivers/gpu/drm/lima/lima_sched.h |  3 ---
> >  3 files changed, 4 insertions(+), 26 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
> > index c528f40981bb..640acc060467 100644
> > --- a/drivers/gpu/drm/lima/lima_gem.c
> > +++ b/drivers/gpu/drm/lima/lima_gem.c
> > @@ -267,7 +267,9 @@ static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
> >       if (explicit)
> >               return 0;
> >
> > -     return drm_gem_fence_array_add_implicit(&task->deps, &bo->base.base, write);
> > +     return drm_sched_job_add_implicit_dependencies(&task->base,
> > +                                                    &bo->base.base,
> > +                                                    write);
> >  }
> >
> >  static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)
> > @@ -285,7 +287,7 @@ static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)
> >               if (err)
> >                       return err;
> >
> > -             err = drm_gem_fence_array_add(&submit->task->deps, fence);
> > +             err = drm_sched_job_add_dependency(&submit->task->base, fence);
> >               if (err) {
> >                       dma_fence_put(fence);
> >                       return err;
> > diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
> > index e968b5a8f0b0..99d5f6f1a882 100644
> > --- a/drivers/gpu/drm/lima/lima_sched.c
> > +++ b/drivers/gpu/drm/lima/lima_sched.c
> > @@ -134,24 +134,15 @@ int lima_sched_task_init(struct lima_sched_task *task,
> >       task->num_bos = num_bos;
> >       task->vm = lima_vm_get(vm);
> >
> > -     xa_init_flags(&task->deps, XA_FLAGS_ALLOC);
> > -
> >       return 0;
> >  }
> >
> >  void lima_sched_task_fini(struct lima_sched_task *task)
> >  {
> > -     struct dma_fence *fence;
> > -     unsigned long index;
> >       int i;
> >
> >       drm_sched_job_cleanup(&task->base);
> >
> > -     xa_for_each(&task->deps, index, fence) {
> > -             dma_fence_put(fence);
> > -     }
> > -     xa_destroy(&task->deps);
> > -
> >       if (task->bos) {
> >               for (i = 0; i < task->num_bos; i++)
> >                       drm_gem_object_put(&task->bos[i]->base.base);
> > @@ -186,17 +177,6 @@ struct dma_fence *lima_sched_context_queue_task(struct lima_sched_task *task)
> >       return fence;
> >  }
> >
> > -static struct dma_fence *lima_sched_dependency(struct drm_sched_job *job,
> > -                                            struct drm_sched_entity *entity)
> > -{
> > -     struct lima_sched_task *task = to_lima_task(job);
> > -
> > -     if (!xa_empty(&task->deps))
> > -             return xa_erase(&task->deps, task->last_dep++);
> > -
> > -     return NULL;
> > -}
> > -
> >  static int lima_pm_busy(struct lima_device *ldev)
> >  {
> >       int ret;
> > @@ -472,7 +452,6 @@ static void lima_sched_free_job(struct drm_sched_job *job)
> >  }
> >
> >  static const struct drm_sched_backend_ops lima_sched_ops = {
> > -     .dependency = lima_sched_dependency,
> >       .run_job = lima_sched_run_job,
> >       .timedout_job = lima_sched_timedout_job,
> >       .free_job = lima_sched_free_job,
> > diff --git a/drivers/gpu/drm/lima/lima_sched.h b/drivers/gpu/drm/lima/lima_sched.h
> > index ac70006b0e26..6a11764d87b3 100644
> > --- a/drivers/gpu/drm/lima/lima_sched.h
> > +++ b/drivers/gpu/drm/lima/lima_sched.h
> > @@ -23,9 +23,6 @@ struct lima_sched_task {
> >       struct lima_vm *vm;
> >       void *frame;
> >
> > -     struct xarray deps;
> > -     unsigned long last_dep;
> > -
> >       struct lima_bo **bos;
> >       int num_bos;
> >
> > --
> > 2.32.0
> >
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch