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

Daniel Vetter
2021-08-12T19:28:16Z

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@intel.com>
> Cc: Qiang Yu <yuq825@gmail.com>
> Cc: Sumit Semwal <sumit.semwal@linaro.org>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: lima@lists.freedesktop.org
> Cc: linux-media@vger.kernel.org
> Cc: linaro-mm-sig@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