drm/amdgpu: cleanup struct amdgpu_ring

This patch consist of below related changes:

1 Rename ring->priority to ring->hw_prio.
2 Assign correct hardware ring priority.
3 Remove ring->priority_mutex as ring priority remains unchanged
  after initialization.
4 Remove unused ring->num_jobs.

v3: remove ring->num_jobs.
v2: remove ring->priority_mutex.

Fixes: 33abcb1f ("drm/amdgpu: set compute queue priority at mqd_init")
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c

@@ -166,7 +166,7 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 		     unsigned int max_dw, struct amdgpu_irq_src *irq_src,
 		     unsigned int irq_type, unsigned int hw_prio)
 {
-	int r, i;
+	int r;
 	int sched_hw_submission = amdgpu_sched_hw_submission;
 	u32 *num_sched;
 	u32 hw_ip;
@@ -258,8 +258,7 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 	}
 
 	ring->max_dw = max_dw;
-	ring->priority = DRM_SCHED_PRIORITY_NORMAL;
-	mutex_init(&ring->priority_mutex);
+	ring->hw_prio = hw_prio;
 
 	if (!ring->no_scheduler) {
 		hw_ip = ring->funcs->type;
@@ -268,9 +267,6 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 			&ring->sched;
 	}
 
-	for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_COUNT; ++i)
-		atomic_set(&ring->num_jobs[i], 0);
-
 	return 0;
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h

@@ -242,11 +242,7 @@ struct amdgpu_ring {
 	struct dma_fence	*vmid_wait;
 	bool			has_compute_vm_bug;
 	bool			no_scheduler;
-
-	atomic_t		num_jobs[DRM_SCHED_PRIORITY_COUNT];
-	struct mutex		priority_mutex;
-	/* protected by priority_mutex */
-	int			priority;
+	int			hw_prio;
 
 #if defined(CONFIG_DEBUG_FS)
 	struct dentry *ent;