Merge branch 'drm-intel-lru' into drm-testing

* drm-intel-lru:
  drm: implement helper functions for scanning lru list
  drm_mm: extract check_free_mm_node
  drm: sane naming for drm_mm.c
  drm: kill dead code in drm_mm.c
  drm: kill drm_mm_node->private
  drm: use list_for_each_entry in drm_mm.c

drivers/gpu/drm/i915/i915_gem.c

@@ -2633,11 +2633,9 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
 	if (free_space != NULL) {
 		obj_priv->gtt_space = drm_mm_get_block(free_space, obj->size,
 						       alignment);
-		if (obj_priv->gtt_space != NULL) {
-			obj_priv->gtt_space->private = obj;
+		if (obj_priv->gtt_space != NULL)
 			obj_priv->gtt_offset = obj_priv->gtt_space->start;
 	}
-	}
 	if (obj_priv->gtt_space == NULL) {
 		/* If the gtt is empty and we're still having trouble
 		 * fitting our object in, we're out of memory.

drivers/gpu/drm/ttm/ttm_bo.c

@@ -476,7 +476,6 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo, bool remove_all)
 			++put_count;
 		}
 		if (bo->mem.mm_node) {
-			bo->mem.mm_node->private = NULL;
 			drm_mm_put_block(bo->mem.mm_node);
 			bo->mem.mm_node = NULL;
 		}
@@ -670,7 +669,6 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
 			printk(KERN_ERR TTM_PFX "Buffer eviction failed\n");
 		spin_lock(&glob->lru_lock);
 		if (evict_mem.mm_node) {
-			evict_mem.mm_node->private = NULL;
 			drm_mm_put_block(evict_mem.mm_node);
 			evict_mem.mm_node = NULL;
 		}
@@ -929,8 +927,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		mem->mm_node = node;
 		mem->mem_type = mem_type;
 		mem->placement = cur_flags;
-		if (node)
-			node->private = bo;
 		return 0;
 	}
 
@@ -973,7 +969,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 						interruptible, no_wait_reserve, no_wait_gpu);
 		if (ret == 0 && mem->mm_node) {
 			mem->placement = cur_flags;
-			mem->mm_node->private = bo;
 			return 0;
 		}
 		if (ret == -ERESTARTSYS)
@@ -1029,7 +1024,6 @@ int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
 out_unlock:
 	if (ret && mem.mm_node) {
 		spin_lock(&glob->lru_lock);
-		mem.mm_node->private = NULL;
 		drm_mm_put_block(mem.mm_node);
 		spin_unlock(&glob->lru_lock);
 	}

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -353,8 +353,6 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
 	fbo->vm_node = NULL;
 
 	fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
-	if (fbo->mem.mm_node)
-		fbo->mem.mm_node->private = (void *)fbo;
 	kref_init(&fbo->list_kref);
 	kref_init(&fbo->kref);
 	fbo->destroy = &ttm_transfered_destroy;

include/drm/drm_mm.h

@@ -42,21 +42,31 @@
 #endif
 
 struct drm_mm_node {
-	struct list_head fl_entry;
-	struct list_head ml_entry;
-	int free;
+	struct list_head free_stack;
+	struct list_head node_list;
+	unsigned free : 1;
+	unsigned scanned_block : 1;
+	unsigned scanned_prev_free : 1;
+	unsigned scanned_next_free : 1;
 	unsigned long start;
 	unsigned long size;
 	struct drm_mm *mm;
-	void *private;
 };
 
 struct drm_mm {
-	struct list_head fl_entry;
-	struct list_head ml_entry;
+	/* List of free memory blocks, most recently freed ordered. */
+	struct list_head free_stack;
+	/* List of all memory nodes, ordered according to the (increasing) start
+	 * address of the memory node. */
+	struct list_head node_list;
 	struct list_head unused_nodes;
 	int num_unused;
 	spinlock_t unused_lock;
+	unsigned scan_alignment;
+	unsigned long scan_size;
+	unsigned long scan_hit_start;
+	unsigned scan_hit_size;
+	unsigned scanned_blocks;
 };
 
 /*
@@ -133,6 +143,11 @@ static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
 	return block->mm;
 }
 
+void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
+		      unsigned alignment);
+int drm_mm_scan_add_block(struct drm_mm_node *node);
+int drm_mm_scan_remove_block(struct drm_mm_node *node);
+
 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
 #ifdef CONFIG_DEBUG_FS
 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);