drm/msm: Use scheduler dependency handling

drm_sched_job_init is already at the right place, so this boils down
to deleting code.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20210805104705.862416-13-daniel.vetter@ffwll.ch

drivers/gpu/drm/msm/msm_gem.h

@@ -312,11 +312,6 @@ struct msm_gem_submit {
 	struct ww_acquire_ctx ticket;
 	uint32_t seqno;		/* Sequence number of the submit on the ring */
 
-	/* Array of struct dma_fence * to block on before submitting this job.
-	 */
-	struct xarray deps;
-	unsigned long last_dep;
-
 	/* Hw fence, which is created when the scheduler executes the job, and
 	 * is signaled when the hw finishes (via seqno write from cmdstream)
 	 */

drivers/gpu/drm/msm/msm_gem_submit.c

@@ -52,8 +52,6 @@ static struct msm_gem_submit *submit_create(struct drm_device *dev,
 		return ERR_PTR(ret);
 	}
 
-	xa_init_flags(&submit->deps, XA_FLAGS_ALLOC);
-
 	kref_init(&submit->ref);
 	submit->dev = dev;
 	submit->aspace = queue->ctx->aspace;
@@ -72,8 +70,6 @@ void __msm_gem_submit_destroy(struct kref *kref)
 {
 	struct msm_gem_submit *submit =
 			container_of(kref, struct msm_gem_submit, ref);
-	unsigned long index;
-	struct dma_fence *fence;
 	unsigned i;
 
 	if (submit->fence_id) {
@@ -82,12 +78,6 @@ void __msm_gem_submit_destroy(struct kref *kref)
 		mutex_unlock(&submit->queue->lock);
 	}
 
-	xa_for_each (&submit->deps, index, fence) {
-		dma_fence_put(fence);
-	}
-
-	xa_destroy(&submit->deps);
-
 	dma_fence_put(submit->user_fence);
 	dma_fence_put(submit->hw_fence);
 
@@ -343,7 +333,8 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 		if (no_implicit)
 			continue;
 
-		ret = drm_gem_fence_array_add_implicit(&submit->deps, obj,
+		ret = drm_sched_job_add_implicit_dependencies(&submit->base,
+							      obj,
 							      write);
 		if (ret)
 			break;
@@ -588,7 +579,7 @@ static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
 		if (ret)
 			break;
 
-		ret = drm_gem_fence_array_add(&submit->deps, fence);
+		ret = drm_sched_job_add_dependency(&submit->base, fence);
 		if (ret)
 			break;
 
@@ -798,7 +789,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 			goto out_unlock;
 		}
 
-		ret = drm_gem_fence_array_add(&submit->deps, in_fence);
+		ret = drm_sched_job_add_dependency(&submit->base, in_fence);
 		if (ret)
 			goto out_unlock;
 	}

drivers/gpu/drm/msm/msm_ringbuffer.c

@@ -11,17 +11,6 @@ static uint num_hw_submissions = 8;
 MODULE_PARM_DESC(num_hw_submissions, "The max # of jobs to write into ringbuffer (default 8)");
 module_param(num_hw_submissions, uint, 0600);
 
-static struct dma_fence *msm_job_dependency(struct drm_sched_job *job,
-		struct drm_sched_entity *s_entity)
-{
-	struct msm_gem_submit *submit = to_msm_submit(job);
-
-	if (!xa_empty(&submit->deps))
-		return xa_erase(&submit->deps, submit->last_dep++);
-
-	return NULL;
-}
-
 static struct dma_fence *msm_job_run(struct drm_sched_job *job)
 {
 	struct msm_gem_submit *submit = to_msm_submit(job);
@@ -52,7 +41,6 @@ static void msm_job_free(struct drm_sched_job *job)
 }
 
 const struct drm_sched_backend_ops msm_sched_ops = {
-	.dependency = msm_job_dependency,
 	.run_job = msm_job_run,
 	.free_job = msm_job_free
 };