drm/radeon: Remove now unused functions in radeon driver

[pandora-kernel.git] / drivers / gpu / drm / drm_gem.c

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 186d62e..396e60c 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -285,6 +285,94 @@ again:
 }
 EXPORT_SYMBOL(drm_gem_handle_create);
 
+
+/**
+ * drm_gem_free_mmap_offset - release a fake mmap offset for an object
+ * @obj: obj in question
+ *
+ * This routine frees fake offsets allocated by drm_gem_create_mmap_offset().
+ */
+void
+drm_gem_free_mmap_offset(struct drm_gem_object *obj)
+{
+       struct drm_device *dev = obj->dev;
+       struct drm_gem_mm *mm = dev->mm_private;
+       struct drm_map_list *list = &obj->map_list;
+
+       drm_ht_remove_item(&mm->offset_hash, &list->hash);
+       drm_mm_put_block(list->file_offset_node);
+       kfree(list->map);
+       list->map = NULL;
+}
+EXPORT_SYMBOL(drm_gem_free_mmap_offset);
+
+/**
+ * drm_gem_create_mmap_offset - create a fake mmap offset for an object
+ * @obj: obj in question
+ *
+ * GEM memory mapping works by handing back to userspace a fake mmap offset
+ * it can use in a subsequent mmap(2) call.  The DRM core code then looks
+ * up the object based on the offset and sets up the various memory mapping
+ * structures.
+ *
+ * This routine allocates and attaches a fake offset for @obj.
+ */
+int
+drm_gem_create_mmap_offset(struct drm_gem_object *obj)
+{
+       struct drm_device *dev = obj->dev;
+       struct drm_gem_mm *mm = dev->mm_private;
+       struct drm_map_list *list;
+       struct drm_local_map *map;
+       int ret = 0;
+
+       /* Set the object up for mmap'ing */
+       list = &obj->map_list;
+       list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL);
+       if (!list->map)
+               return -ENOMEM;
+
+       map = list->map;
+       map->type = _DRM_GEM;
+       map->size = obj->size;
+       map->handle = obj;
+
+       /* Get a DRM GEM mmap offset allocated... */
+       list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
+                       obj->size / PAGE_SIZE, 0, 0);
+
+       if (!list->file_offset_node) {
+               DRM_ERROR("failed to allocate offset for bo %d\n", obj->name);
+               ret = -ENOSPC;
+               goto out_free_list;
+       }
+
+       list->file_offset_node = drm_mm_get_block(list->file_offset_node,
+                       obj->size / PAGE_SIZE, 0);
+       if (!list->file_offset_node) {
+               ret = -ENOMEM;
+               goto out_free_list;
+       }
+
+       list->hash.key = list->file_offset_node->start;
+       ret = drm_ht_insert_item(&mm->offset_hash, &list->hash);
+       if (ret) {
+               DRM_ERROR("failed to add to map hash\n");
+               goto out_free_mm;
+       }
+
+       return 0;
+
+out_free_mm:
+       drm_mm_put_block(list->file_offset_node);
+out_free_list:
+       kfree(list->map);
+       list->map = NULL;
+
+       return ret;
+}
+EXPORT_SYMBOL(drm_gem_create_mmap_offset);
+
 /** Returns a reference to the object named by the handle. */
 struct drm_gem_object *
 drm_gem_object_lookup(struct drm_device *dev, struct drm_file *filp,