drm: Export routines for inserting preallocated nodes into the mm manager

Required by i915 in order to avoid the allocation in the middle of
manipulating the drm_mm lists.

Use a pair of stubs to preserve the existing EXPORT_SYMBOLs for
backporting; to be removed later.

Cc: Dave Airlie <airlied@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
[danvet: bikeshedded-away the atomic parameter, it's not yet used
anywhere.]
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 50 insertions, 16 deletions

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 0761a03cdbb2..2bf9670ba29b 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -184,19 +184,27 @@ EXPORT_SYMBOL(drm_mm_get_block_generic);
  * -ENOSPC if no suitable free area is available. The preallocated memory node
  * must be cleared.
  */
-int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
-                       unsigned long size, unsigned alignment)
+int drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
+                               unsigned long size, unsigned alignment,
+                               unsigned long color)
 {
         struct drm_mm_node *hole_node;
 
-        hole_node = drm_mm_search_free(mm, size, alignment, false);
+        hole_node = drm_mm_search_free_generic(mm, size, alignment,
+                                               color, 0);
         if (!hole_node)
                 return -ENOSPC;
 
-        drm_mm_insert_helper(hole_node, node, size, alignment, 0);
-
+        drm_mm_insert_helper(hole_node, node, size, alignment, color);
         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,
@@ -275,22 +283,31 @@ EXPORT_SYMBOL(drm_mm_get_block_range_generic);
  * -ENOSPC if no suitable free area is available. This is for range
  * restricted allocations. The preallocated memory node must be cleared.
  */
-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)
+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)
 {
         struct drm_mm_node *hole_node;
 
-        hole_node = drm_mm_search_free_in_range(mm, size, alignment,
-                                                start, end, false);
+        hole_node = drm_mm_search_free_in_range_generic(mm,
+                                                        size, alignment, color,
+                                                        start, end, 0);
         if (!hole_node)
                 return -ENOSPC;
 
-        drm_mm_insert_helper_range(hole_node, node, size, alignment, 0,
+        drm_mm_insert_helper_range(hole_node, node,
+                                   size, alignment, color,
                                    start, end);
-
         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);
 
 /**
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 06d7f798a08c..0f4a366f6fa6 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -158,12 +158,29 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
         return drm_mm_get_block_range_generic(parent, size, alignment, 0,
                                                 start, end, 1);
 }
-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(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);
+                                       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);
 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);