drm: Change create block to reserve node

With the previous patch we no longer actually create a node, we simply
find the correct hole and occupy it. This very well could have been
squashed with the last patch, but since I already had David's review, I
figured it's easiest to keep it distinct.

Also update the users in i915. Conveniently this is the only user of the
interface.

CC: David Airlie <airlied@linux.ie>
CC: <dri-devel@lists.freedesktop.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Acked-by: David Airlie <airlied@linux.ie>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

4 files changed, 22 insertions, 22 deletions

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 9e8dfbc1955e..52e0ee7f4a6f 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -147,27 +147,27 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
         }
 }
 
-int drm_mm_create_block(struct drm_mm *mm, struct drm_mm_node *node,
-                        unsigned long start, unsigned long size)
+int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
 {
         struct drm_mm_node *hole;
-        unsigned long end = start + size;
+        unsigned long end = node->start + node->size;
         unsigned long hole_start;
         unsigned long hole_end;
 
+        BUG_ON(node == NULL);
+
+        /* Find the relevant hole to add our node to */
         drm_mm_for_each_hole(hole, mm, hole_start, hole_end) {
-                if (hole_start > start || hole_end < end)
+                if (hole_start > node->start || hole_end < end)
                         continue;
 
-                node->start = start;
-                node->size = size;
                 node->mm = mm;
                 node->allocated = 1;
 
                 INIT_LIST_HEAD(&node->hole_stack);
                 list_add(&node->node_list, &hole->node_list);
 
-                if (start == hole_start) {
+                if (node->start == hole_start) {
                         hole->hole_follows = 0;
                         list_del_init(&hole->hole_stack);
                 }
@@ -181,10 +181,11 @@ int drm_mm_create_block(struct drm_mm *mm, struct drm_mm_node *node,
                 return 0;
         }
 
-        WARN(1, "no hole found for block 0x%lx + 0x%lx\n", start, size);
+        WARN(1, "no hole found for node 0x%lx + 0x%lx\n",
+             node->start, node->size);
         return -ENOSPC;
 }
-EXPORT_SYMBOL(drm_mm_create_block);
+EXPORT_SYMBOL(drm_mm_reserve_node);
 
 struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
                                              unsigned long size,
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 88180a597c0a..afba7e5e7739 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -640,10 +640,10 @@ void i915_gem_setup_global_gtt(struct drm_device *dev,
                                   obj->gtt_offset);
                         continue;
                 }
-                ret = drm_mm_create_block(&dev_priv->mm.gtt_space,
-                                          obj->gtt_space,
-                                          obj->gtt_offset,
-                                          obj->base.size);
+                obj->gtt_space->start = obj->gtt_offset;
+                obj->gtt_space->size = obj->base.size;
+                ret = drm_mm_reserve_node(&dev_priv->mm.gtt_space,
+                                          obj->gtt_space);
                 if (ret) {
                         DRM_DEBUG_KMS("Reservation failed\n");
                         kfree(obj->gtt_space);
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 2746ff2d846a..4e6dbbb47dfe 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -349,8 +349,9 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
         if (!stolen)
                 return NULL;
 
-        ret = drm_mm_create_block(&dev_priv->mm.stolen, stolen, stolen_offset,
-                                  size);
+        stolen->start = stolen_offset;
+        stolen->size = size;
+        ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
         if (ret) {
                 DRM_DEBUG_KMS("failed to allocate stolen space\n");
                 kfree(stolen);
@@ -380,9 +381,10 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
                         goto unref_out;
                 }
 
-                ret = drm_mm_create_block(&dev_priv->mm.gtt_space,
-                                          obj->gtt_space,
-                                          gtt_offset, size);
+                obj->gtt_space->start = gtt_offset;
+                obj->gtt_space->size = size;
+                ret = drm_mm_reserve_node(&dev_priv->mm.gtt_space,
+                                          obj->gtt_space);
                 if (ret) {
                         DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
                         goto free_out;
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index d8b56b7d1839..2de91e3da5cc 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -138,10 +138,7 @@ static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
 /*
  * Basic range manager support (drm_mm.c)
  */
-extern int drm_mm_create_block(struct drm_mm *mm,
-                               struct drm_mm_node *node,
-                               unsigned long start,
-                               unsigned long size);
+extern int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
                                                     unsigned long size,
                                                     unsigned alignment,