drm/amdgpu: remove ring lru handling

Not needed any more.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -135,9 +135,6 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring)
 
 	if (ring->funcs->end_use)
 		ring->funcs->end_use(ring);
-
-	if (ring->funcs->type != AMDGPU_RING_TYPE_KIQ)
-		amdgpu_ring_lru_touch(ring->adev, ring);
 }
 
 /**
@@ -320,8 +317,6 @@ 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);
-	INIT_LIST_HEAD(&ring->lru_list);
-	amdgpu_ring_lru_touch(adev, ring);
 
 	for (i = 0; i < DRM_SCHED_PRIORITY_MAX; ++i)
 		atomic_set(&ring->num_jobs[i], 0);
@@ -368,99 +363,6 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring)
 	ring->adev->rings[ring->idx] = NULL;
 }
 
-static void amdgpu_ring_lru_touch_locked(struct amdgpu_device *adev,
-					 struct amdgpu_ring *ring)
-{
-	/* list_move_tail handles the case where ring isn't part of the list */
-	list_move_tail(&ring->lru_list, &adev->ring_lru_list);
-}
-
-static bool amdgpu_ring_is_blacklisted(struct amdgpu_ring *ring,
-				       int *blacklist, int num_blacklist)
-{
-	int i;
-
-	for (i = 0; i < num_blacklist; i++) {
-		if (ring->idx == blacklist[i])
-			return true;
-	}
-
-	return false;
-}
-
-/**
- * amdgpu_ring_lru_get - get the least recently used ring for a HW IP block
- *
- * @adev: amdgpu_device pointer
- * @type: amdgpu_ring_type enum
- * @blacklist: blacklisted ring ids array
- * @num_blacklist: number of entries in @blacklist
- * @lru_pipe_order: find a ring from the least recently used pipe
- * @ring: output ring
- *
- * Retrieve the amdgpu_ring structure for the least recently used ring of
- * a specific IP block (all asics).
- * Returns 0 on success, error on failure.
- */
-int amdgpu_ring_lru_get(struct amdgpu_device *adev, int type,
-			int *blacklist,	int num_blacklist,
-			bool lru_pipe_order, struct amdgpu_ring **ring)
-{
-	struct amdgpu_ring *entry;
-
-	/* List is sorted in LRU order, find first entry corresponding
-	 * to the desired HW IP */
-	*ring = NULL;
-	spin_lock(&adev->ring_lru_list_lock);
-	list_for_each_entry(entry, &adev->ring_lru_list, lru_list) {
-		if (entry->funcs->type != type)
-			continue;
-
-		if (amdgpu_ring_is_blacklisted(entry, blacklist, num_blacklist))
-			continue;
-
-		if (!*ring) {
-			*ring = entry;
-
-			/* We are done for ring LRU */
-			if (!lru_pipe_order)
-				break;
-		}
-
-		/* Move all rings on the same pipe to the end of the list */
-		if (entry->pipe == (*ring)->pipe)
-			amdgpu_ring_lru_touch_locked(adev, entry);
-	}
-
-	/* Move the ring we found to the end of the list */
-	if (*ring)
-		amdgpu_ring_lru_touch_locked(adev, *ring);
-
-	spin_unlock(&adev->ring_lru_list_lock);
-
-	if (!*ring) {
-		DRM_ERROR("Ring LRU contains no entries for ring type:%d\n", type);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * amdgpu_ring_lru_touch - mark a ring as recently being used
- *
- * @adev: amdgpu_device pointer
- * @ring: ring to touch
- *
- * Move @ring to the tail of the lru list
- */
-void amdgpu_ring_lru_touch(struct amdgpu_device *adev, struct amdgpu_ring *ring)
-{
-	spin_lock(&adev->ring_lru_list_lock);
-	amdgpu_ring_lru_touch_locked(adev, ring);
-	spin_unlock(&adev->ring_lru_list_lock);
-}
-
 /**
  * amdgpu_ring_emit_reg_write_reg_wait_helper - ring helper
  *

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

@@ -175,7 +175,6 @@ struct amdgpu_ring {
 	const struct amdgpu_ring_funcs	*funcs;
 	struct amdgpu_fence_driver	fence_drv;
 	struct drm_gpu_scheduler	sched;
-	struct list_head		lru_list;
 
 	struct amdgpu_bo	*ring_obj;
 	volatile uint32_t	*ring;
@@ -258,10 +257,6 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 		     unsigned ring_size, struct amdgpu_irq_src *irq_src,
 		     unsigned irq_type);
 void amdgpu_ring_fini(struct amdgpu_ring *ring);
-int amdgpu_ring_lru_get(struct amdgpu_device *adev, int type,
-			int *blacklist, int num_blacklist,
-			bool lru_pipe_order, struct amdgpu_ring **ring);
-void amdgpu_ring_lru_touch(struct amdgpu_device *adev, struct amdgpu_ring *ring);
 void amdgpu_ring_emit_reg_write_reg_wait_helper(struct amdgpu_ring *ring,
 						uint32_t reg0, uint32_t val0,
 						uint32_t reg1, uint32_t val1);