[PATCH v2] drm/amdgpu: Replace 'amdgpu_job_submit_direct' with 'drm_sched_entity' in cleaner shader

[Srinivasan Shanmugam]

This commit replaces the use of amdgpu_job_submit_direct which submits
the job to the ring directly, with drm_sched_entity in the cleaner
shader job submission process. The change allows the GPU scheduler to
manage the cleaner shader job.

- The job is then submitted to the GPU using the
  drm_sched_entity_push_job function, which allows the GPU scheduler to
  manage the job.

This change improves the reliability of the cleaner shader job
submission process by leveraging the capabilities of the GPU scheduler.

Fixes: f70111466165 ("drm/amdgpu: Add sysfs interface for running cleaner shader")
Cc: Christian König <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
Suggested-by: Christian König <christian.koenig at amd.com>
---
v2: 
  - Dropped default assignment of f. (Christian)
  - Moved drm_sched entity; to stack from amdgpu_gfx structure.
    (Christian)

 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 35 ++++++++++++++-----------
 1 file changed, 19 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index b779d47a546a..83e54697f0ee 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -1397,14 +1397,23 @@ static ssize_t amdgpu_gfx_get_available_compute_partition(struct device *dev,
 static int amdgpu_gfx_run_cleaner_shader_job(struct amdgpu_ring *ring)
 {
 	struct amdgpu_device *adev = ring->adev;
-	long timeout = msecs_to_jiffies(1000);
-	struct dma_fence *f = NULL;
+	struct drm_gpu_scheduler *sched = &ring->sched;
+	struct drm_sched_entity entity;
+	struct dma_fence *f;
 	struct amdgpu_job *job;
 	struct amdgpu_ib *ib;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(adev, NULL, NULL,
-				     64, AMDGPU_IB_POOL_DIRECT,
+	/* Initialize the scheduler entity */
+	r = drm_sched_entity_init(&entity, DRM_SCHED_PRIORITY_NORMAL,
+				  &sched, 1, NULL);
+	if (r) {
+		dev_err(adev->dev, "Failed setting up GFX kernel entity.\n");
+		goto err;
+	}
+
+	r = amdgpu_job_alloc_with_ib(ring->adev, &entity, NULL,
+				     64, 0,
 				     &job);
 	if (r)
 		goto err;
@@ -1416,24 +1425,18 @@ static int amdgpu_gfx_run_cleaner_shader_job(struct amdgpu_ring *ring)
 		ib->ptr[i] = ring->funcs->nop;
 	ib->length_dw = ring->funcs->align_mask + 1;
 
-	r = amdgpu_job_submit_direct(job, ring, &f);
-	if (r)
-		goto err_free;
+	f = amdgpu_job_submit(job);
 
-	r = dma_fence_wait_timeout(f, false, timeout);
-	if (r == 0)
-		r = -ETIMEDOUT;
-	else if (r > 0)
-		r = 0;
+	r = dma_fence_wait(f, false);
+	if (r)
+		goto err;
 
-	amdgpu_ib_free(adev, ib, f);
 	dma_fence_put(f);
 
+	/* Clean up the scheduler entity */
+	drm_sched_entity_destroy(&entity);
 	return 0;
 
-err_free:
-	amdgpu_job_free(job);
-	amdgpu_ib_free(adev, ib, f);
 err:
 	return r;
 }
-- 
2.34.1