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-rw-r--r--include/drm/drm_mm.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 0f4a366f6fa6..9b991f91d81b 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -89,6 +89,29 @@ static inline bool drm_mm_initialized(struct drm_mm *mm)
{
return mm->hole_stack.next;
}
+
+static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
+{
+ return hole_node->start + hole_node->size;
+}
+
+static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
+{
+ BUG_ON(!hole_node->hole_follows);
+ return __drm_mm_hole_node_start(hole_node);
+}
+
+static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
+{
+ return list_entry(hole_node->node_list.next,
+ struct drm_mm_node, node_list)->start;
+}
+
+static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
+{
+ return __drm_mm_hole_node_end(hole_node);
+}
+
#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
&(mm)->head_node.node_list, \
node_list)
@@ -99,9 +122,26 @@ static inline bool drm_mm_initialized(struct drm_mm *mm)
entry != NULL; entry = next, \
next = entry ? list_entry(entry->node_list.next, \
struct drm_mm_node, node_list) : NULL) \
+
+/* Note that we need to unroll list_for_each_entry in order to inline
+ * setting hole_start and hole_end on each iteration and keep the
+ * macro sane.
+ */
+#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \
+ for (entry = list_entry((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(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,