diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 07cf99c..7095328 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -49,7 +49,7 @@
 
 #define MM_UNUSED_TARGET 4
 
-static struct drm_mm_node *drm_mm_kmalloc(struct drm_mm *mm, int atomic)
+static struct drm_mm_node *drm_mm_kmalloc(struct drm_mm *mm, bool atomic)
 {
 	struct drm_mm_node *child;
 
@@ -105,7 +105,8 @@ EXPORT_SYMBOL(drm_mm_pre_get);
 static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
 				 struct drm_mm_node *node,
 				 unsigned long size, unsigned alignment,
-				 unsigned long color)
+				 unsigned long color,
+				 enum drm_mm_allocator_flags flags)
 {
 	struct drm_mm *mm = hole_node->mm;
 	unsigned long hole_start = drm_mm_hole_node_start(hole_node);
@@ -118,12 +119,22 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
 	if (mm->color_adjust)
 		mm->color_adjust(hole_node, color, &adj_start, &adj_end);
 
+	if (flags & DRM_MM_CREATE_TOP)
+		adj_start = adj_end - size;
+
 	if (alignment) {
 		unsigned tmp = adj_start % alignment;
-		if (tmp)
-			adj_start += alignment - tmp;
+		if (tmp) {
+			if (flags & DRM_MM_CREATE_TOP)
+				adj_start -= tmp;
+			else
+				adj_start += alignment - tmp;
+		}
 	}
 
+	BUG_ON(adj_start < hole_start);
+	BUG_ON(adj_end > hole_end);
+
 	if (adj_start == hole_start) {
 		hole_node->hole_follows = 0;
 		list_del(&hole_node->hole_stack);
@@ -150,7 +161,7 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
 struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
 					unsigned long start,
 					unsigned long size,
-					bool atomic)
+					enum drm_mm_allocator_flags flags)
 {
 	struct drm_mm_node *hole, *node;
 	unsigned long end = start + size;
@@ -161,7 +172,7 @@ struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
 		if (hole_start > start || hole_end < end)
 			continue;
 
-		node = drm_mm_kmalloc(mm, atomic);
+		node = drm_mm_kmalloc(mm, flags & DRM_MM_CREATE_ATOMIC);
 		if (unlikely(node == NULL))
 			return NULL;
 
@@ -196,15 +207,15 @@ struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
 					     unsigned long size,
 					     unsigned alignment,
 					     unsigned long color,
-					     int atomic)
+					     enum drm_mm_allocator_flags flags)
 {
 	struct drm_mm_node *node;
 
-	node = drm_mm_kmalloc(hole_node->mm, atomic);
+	node = drm_mm_kmalloc(hole_node->mm, flags & DRM_MM_CREATE_ATOMIC);
 	if (unlikely(node == NULL))
 		return NULL;
 
-	drm_mm_insert_helper(hole_node, node, size, alignment, color);
+	drm_mm_insert_helper(hole_node, node, size, alignment, color, flags);
 
 	return node;
 }
@@ -217,32 +228,28 @@ EXPORT_SYMBOL(drm_mm_get_block_generic);
  */
 int drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
 			       unsigned long size, unsigned alignment,
-			       unsigned long color)
+			       unsigned long color,
+			       enum drm_mm_allocator_flags aflags,
+			       enum drm_mm_search_flags sflags)
 {
 	struct drm_mm_node *hole_node;
 
 	hole_node = drm_mm_search_free_generic(mm, size, alignment,
-					       color, 0);
+					       color, sflags);
 	if (!hole_node)
 		return -ENOSPC;
 
-	drm_mm_insert_helper(hole_node, node, size, alignment, color);
+	drm_mm_insert_helper(hole_node, node, size, alignment, color, aflags);
 	return 0;
 }
 EXPORT_SYMBOL(drm_mm_insert_node_generic);
 
-int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
-		       unsigned long size, unsigned alignment)
-{
-	return drm_mm_insert_node_generic(mm, node, size, alignment, 0);
-}
-EXPORT_SYMBOL(drm_mm_insert_node);
-
 static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
 				       struct drm_mm_node *node,
 				       unsigned long size, unsigned alignment,
 				       unsigned long color,
-				       unsigned long start, unsigned long end)
+				       unsigned long start, unsigned long end,
+				       enum drm_mm_search_flags flags)
 {
 	struct drm_mm *mm = hole_node->mm;
 	unsigned long hole_start = drm_mm_hole_node_start(hole_node);
@@ -257,13 +264,20 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
 	if (adj_end > end)
 		adj_end = end;
 
+	if (flags & DRM_MM_CREATE_TOP)
+		adj_start = adj_end - size;
+
 	if (mm->color_adjust)
 		mm->color_adjust(hole_node, color, &adj_start, &adj_end);
 
 	if (alignment) {
 		unsigned tmp = adj_start % alignment;
-		if (tmp)
-			adj_start += alignment - tmp;
+		if (tmp) {
+			if (flags & DRM_MM_CREATE_TOP)
+				adj_start -= tmp;
+			else
+				adj_start += alignment - tmp;
+		}
 	}
 
 	if (adj_start == hole_start) {
@@ -280,6 +294,8 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
 	INIT_LIST_HEAD(&node->hole_stack);
 	list_add(&node->node_list, &hole_node->node_list);
 
+	BUG_ON(node->start < start);
+	BUG_ON(node->start < adj_start);
 	BUG_ON(node->start + node->size > adj_end);
 	BUG_ON(node->start + node->size > end);
 
@@ -290,22 +306,23 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
 	}
 }
 
-struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node,
-						unsigned long size,
-						unsigned alignment,
-						unsigned long color,
-						unsigned long start,
-						unsigned long end,
-						int atomic)
+struct drm_mm_node *
+drm_mm_get_block_range_generic(struct drm_mm_node *hole_node,
+			       unsigned long size,
+			       unsigned alignment,
+			       unsigned long color,
+			       unsigned long start,
+			       unsigned long end,
+			       enum drm_mm_allocator_flags flags)
 {
 	struct drm_mm_node *node;
 
-	node = drm_mm_kmalloc(hole_node->mm, atomic);
+	node = drm_mm_kmalloc(hole_node->mm, flags & DRM_MM_CREATE_ATOMIC);
 	if (unlikely(node == NULL))
 		return NULL;
 
 	drm_mm_insert_helper_range(hole_node, node, size, alignment, color,
-				   start, end);
+				   start, end, flags);
 
 	return node;
 }
@@ -318,31 +335,25 @@ EXPORT_SYMBOL(drm_mm_get_block_range_generic);
  */
 int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, struct drm_mm_node *node,
 					unsigned long size, unsigned alignment, unsigned long color,
-					unsigned long start, unsigned long end)
+					unsigned long start, unsigned long end,
+					enum drm_mm_allocator_flags aflags,
+					enum drm_mm_search_flags sflags)
 {
 	struct drm_mm_node *hole_node;
 
 	hole_node = drm_mm_search_free_in_range_generic(mm,
 							size, alignment, color,
-							start, end, 0);
+							start, end, sflags);
 	if (!hole_node)
 		return -ENOSPC;
 
 	drm_mm_insert_helper_range(hole_node, node,
 				   size, alignment, color,
-				   start, end);
+				   start, end, aflags);
 	return 0;
 }
 EXPORT_SYMBOL(drm_mm_insert_node_in_range_generic);
 
-int drm_mm_insert_node_in_range(struct drm_mm *mm, struct drm_mm_node *node,
-				unsigned long size, unsigned alignment,
-				unsigned long start, unsigned long end)
-{
-	return drm_mm_insert_node_in_range_generic(mm, node, size, alignment, 0, start, end);
-}
-EXPORT_SYMBOL(drm_mm_insert_node_in_range);
-
 /**
  * Remove a memory node from the allocator.
  */
@@ -418,7 +429,7 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
 					       unsigned long size,
 					       unsigned alignment,
 					       unsigned long color,
-					       bool best_match)
+					       enum drm_mm_search_flags flags)
 {
 	struct drm_mm_node *entry;
 	struct drm_mm_node *best;
@@ -431,7 +442,8 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
 	best = NULL;
 	best_size = ~0UL;
 
-	drm_mm_for_each_hole(entry, mm, adj_start, adj_end) {
+	__drm_mm_for_each_hole(entry, mm, adj_start, adj_end,
+			       flags & DRM_MM_SEARCH_BELOW) {
 		if (mm->color_adjust) {
 			mm->color_adjust(entry, color, &adj_start, &adj_end);
 			if (adj_end <= adj_start)
@@ -441,7 +453,7 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
 		if (!check_free_hole(adj_start, adj_end, size, alignment))
 			continue;
 
-		if (!best_match)
+		if ((flags & DRM_MM_SEARCH_BEST) == 0)
 			return entry;
 
 		if (entry->size < best_size) {
@@ -454,13 +466,14 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
 }
 EXPORT_SYMBOL(drm_mm_search_free_generic);
 
-struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
-							unsigned long size,
-							unsigned alignment,
-							unsigned long color,
-							unsigned long start,
-							unsigned long end,
-							bool best_match)
+struct drm_mm_node *
+drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
+				    unsigned long size,
+				    unsigned alignment,
+				    unsigned long color,
+				    unsigned long start,
+				    unsigned long end,
+				    enum drm_mm_search_flags flags)
 {
 	struct drm_mm_node *entry;
 	struct drm_mm_node *best;
@@ -473,7 +486,8 @@ struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
 	best = NULL;
 	best_size = ~0UL;
 
-	drm_mm_for_each_hole(entry, mm, adj_start, adj_end) {
+	__drm_mm_for_each_hole(entry, mm, adj_start, adj_end,
+			       flags & DRM_MM_SEARCH_BELOW) {
 		if (adj_start < start)
 			adj_start = start;
 		if (adj_end > end)
@@ -488,7 +502,7 @@ struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
 		if (!check_free_hole(adj_start, adj_end, size, alignment))
 			continue;
 
-		if (!best_match)
+		if ((flags & DRM_MM_SEARCH_BEST) == 0)
 			return entry;
 
 		if (entry->size < best_size) {
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 819d4a1..2fc9b93 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2995,7 +2995,9 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
 search_free:
 	ret = drm_mm_insert_node_in_range_generic(&dev_priv->mm.gtt_space, node,
 						  size, alignment,
-						  obj->cache_level, 0, max);
+						  obj->cache_level, 0, max,
+						  DRM_MM_CREATE_DEFAULT,
+						  DRM_MM_SEARCH_DEFAULT);
 	if (ret) {
 		ret = i915_gem_evict_something(dev, size, alignment,
 					       obj->cache_level,
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 88591ef..8935710 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -41,6 +41,21 @@
 #include <linux/seq_file.h>
 #endif
 
+enum drm_mm_allocator_flags {
+	DRM_MM_CREATE_DEFAULT = 0,
+	DRM_MM_CREATE_ATOMIC = 1<<0,
+	DRM_MM_CREATE_TOP = 1<<1,
+};
+
+enum drm_mm_search_flags {
+	DRM_MM_SEARCH_DEFAULT = 0,
+	DRM_MM_SEARCH_BEST = 1<<0,
+	DRM_MM_SEARCH_BELOW = 1<<1,
+};
+
+#define DRM_MM_BOTTOMUP DRM_MM_CREATE_DEFAULT, DRM_MM_SEARCH_DEFAULT
+#define DRM_MM_TOPDOWN DRM_MM_CREATE_TOP, DRM_MM_SEARCH_BELOW
+
 struct drm_mm_node {
 	struct list_head node_list;
 	struct list_head hole_stack;
@@ -135,26 +150,37 @@ static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
 	     1 : 0; \
 	     entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack))
 
+#define __drm_mm_for_each_hole(entry, mm, hole_start, hole_end, backwards) \
+	for (entry = list_entry((backwards) ? (mm)->hole_stack.prev : (mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
+	     &entry->hole_stack != &(mm)->hole_stack ? \
+	     hole_start = drm_mm_hole_node_start(entry), \
+	     hole_end = drm_mm_hole_node_end(entry), \
+	     1 : 0; \
+	     entry = list_entry((backwards) ? entry->hole_stack.prev : entry->hole_stack.next, struct drm_mm_node, hole_stack))
+
 /*
  * Basic range manager support (drm_mm.c)
  */
-extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
-					       unsigned long start,
-					       unsigned long size,
-					       bool atomic);
-extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
-						    unsigned long size,
-						    unsigned alignment,
-						    unsigned long color,
-						    int atomic);
-extern struct drm_mm_node *drm_mm_get_block_range_generic(
-						struct drm_mm_node *node,
-						unsigned long size,
-						unsigned alignment,
-						unsigned long color,
-						unsigned long start,
-						unsigned long end,
-						int atomic);
+extern struct drm_mm_node *
+drm_mm_create_block(struct drm_mm *mm,
+		    unsigned long start,
+		    unsigned long size,
+		    enum drm_mm_allocator_flags flags);
+extern struct drm_mm_node *
+drm_mm_get_block_generic(struct drm_mm_node *node,
+			 unsigned long size,
+			 unsigned alignment,
+			 unsigned long color,
+			 enum drm_mm_allocator_flags flags);
+extern struct drm_mm_node *
+drm_mm_get_block_range_generic(struct drm_mm_node *node,
+			       unsigned long size,
+			       unsigned alignment,
+			       unsigned long color,
+			       unsigned long start,
+			       unsigned long end,
+			       enum drm_mm_allocator_flags flags);
+
 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
 						   unsigned long size,
 						   unsigned alignment)
@@ -165,7 +191,8 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *pa
 							  unsigned long size,
 							  unsigned alignment)
 {
-	return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
+	return drm_mm_get_block_generic(parent, size, alignment, 0,
+					DRM_MM_CREATE_ATOMIC);
 }
 static inline struct drm_mm_node *drm_mm_get_block_range(
 						struct drm_mm_node *parent,
@@ -196,39 +223,41 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
 						unsigned long end)
 {
 	return drm_mm_get_block_range_generic(parent, size, alignment, 0,
-						start, end, 1);
+						start, end,
+						DRM_MM_CREATE_ATOMIC);
 }
 
-extern int drm_mm_insert_node(struct drm_mm *mm,
-			      struct drm_mm_node *node,
-			      unsigned long size,
-			      unsigned alignment);
-extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
-				       struct drm_mm_node *node,
-				       unsigned long size,
-				       unsigned alignment,
-				       unsigned long start,
-				       unsigned long end);
 extern int drm_mm_insert_node_generic(struct drm_mm *mm,
 				      struct drm_mm_node *node,
 				      unsigned long size,
 				      unsigned alignment,
-				      unsigned long color);
-extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
-				       struct drm_mm_node *node,
-				       unsigned long size,
-				       unsigned alignment,
-				       unsigned long color,
-				       unsigned long start,
-				       unsigned long end);
+				      unsigned long color,
+				      enum drm_mm_allocator_flags aflags,
+				      enum drm_mm_search_flags sflags);
+#define drm_mm_insert_node(mm, node, size, alignment) \
+	drm_mm_insert_node_generic(mm, node, size, alignment, 0, 0)
+extern int
+drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
+				    struct drm_mm_node *node,
+				    unsigned long size,
+				    unsigned alignment,
+				    unsigned long color,
+				    unsigned long start,
+				    unsigned long end,
+				    enum drm_mm_allocator_flags aflags,
+				    enum drm_mm_search_flags sflags);
+#define drm_mm_insert_node_in_range(mm, node, size, alignment, start, end) \
+	drm_mm_insert_node_in_range_generic(mm, node, size, alignment, 0, start, end, 0)
 extern void drm_mm_put_block(struct drm_mm_node *cur);
 extern void drm_mm_remove_node(struct drm_mm_node *node);
 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
-extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
-						      unsigned long size,
-						      unsigned alignment,
-						      unsigned long color,
-						      bool best_match);
+
+extern struct drm_mm_node *
+drm_mm_search_free_generic(const struct drm_mm *mm,
+			   unsigned long size,
+			   unsigned alignment,
+			   unsigned long color,
+			   enum drm_mm_search_flags flags);
 extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
 						const struct drm_mm *mm,
 						unsigned long size,
@@ -236,13 +265,15 @@ extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
 						unsigned long color,
 						unsigned long start,
 						unsigned long end,
-						bool best_match);
-static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
-						     unsigned long size,
-						     unsigned alignment,
-						     bool best_match)
+						enum drm_mm_search_flags flags);
+
+static inline struct drm_mm_node *
+drm_mm_search_free(const struct drm_mm *mm,
+		   unsigned long size,
+		   unsigned alignment,
+		   enum drm_mm_search_flags flags)
 {
-	return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);
+	return drm_mm_search_free_generic(mm, size, alignment, 0, flags);
 }
 static inline  struct drm_mm_node *drm_mm_search_free_in_range(
 						const struct drm_mm *mm,
@@ -250,18 +281,19 @@ static inline  struct drm_mm_node *drm_mm_search_free_in_range(
 						unsigned alignment,
 						unsigned long start,
 						unsigned long end,
-						bool best_match)
+						enum drm_mm_search_flags flags)
 {
 	return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
-						   start, end, best_match);
+						   start, end, flags);
 }
-static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,
-							   unsigned long size,
-							   unsigned alignment,
-							   unsigned long color,
-							   bool best_match)
+static inline struct drm_mm_node *
+drm_mm_search_free_color(const struct drm_mm *mm,
+			 unsigned long size,
+			 unsigned alignment,
+			 unsigned long color,
+			 enum drm_mm_search_flags flags)
 {
-	return drm_mm_search_free_generic(mm,size, alignment, color, best_match);
+	return drm_mm_search_free_generic(mm, size, alignment, color, flags);
 }
 static inline  struct drm_mm_node *drm_mm_search_free_in_range_color(
 						const struct drm_mm *mm,
@@ -270,10 +302,10 @@ static inline  struct drm_mm_node *drm_mm_search_free_in_range_color(
 						unsigned long color,
 						unsigned long start,
 						unsigned long end,
-						bool best_match)
+						enum drm_mm_search_flags flags)
 {
 	return drm_mm_search_free_in_range_generic(mm, size, alignment, color,
-						   start, end, best_match);
+						   start, end, flags);
 }
 extern int drm_mm_init(struct drm_mm *mm,
 		       unsigned long start,
