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-rw-r--r--include/drm/drm_mm.h34
1 files changed, 33 insertions, 1 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 101f566ae43d..2c3bbb43c7d1 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -109,6 +109,38 @@ enum drm_mm_insert_mode {
* Allocates the node from the bottom of the found hole.
*/
DRM_MM_INSERT_EVICT,
+
+ /**
+ * @DRM_MM_INSERT_ONCE:
+ *
+ * Only check the first hole for suitablity and report -ENOSPC
+ * immediately otherwise, rather than check every hole until a
+ * suitable one is found. Can only be used in conjunction with another
+ * search method such as DRM_MM_INSERT_HIGH or DRM_MM_INSERT_LOW.
+ */
+ DRM_MM_INSERT_ONCE = BIT(31),
+
+ /**
+ * @DRM_MM_INSERT_HIGHEST:
+ *
+ * Only check the highest hole (the hole with the largest address) and
+ * insert the node at the top of the hole or report -ENOSPC if
+ * unsuitable.
+ *
+ * Does not search all holes.
+ */
+ DRM_MM_INSERT_HIGHEST = DRM_MM_INSERT_HIGH | DRM_MM_INSERT_ONCE,
+
+ /**
+ * @DRM_MM_INSERT_LOWEST:
+ *
+ * Only check the lowest hole (the hole with the smallest address) and
+ * insert the node at the bottom of the hole or report -ENOSPC if
+ * unsuitable.
+ *
+ * Does not search all holes.
+ */
+ DRM_MM_INSERT_LOWEST = DRM_MM_INSERT_LOW | DRM_MM_INSERT_ONCE,
};
/**
@@ -173,7 +205,7 @@ struct drm_mm {
struct drm_mm_node head_node;
/* Keep an interval_tree for fast lookup of drm_mm_nodes by address. */
struct rb_root_cached interval_tree;
- struct rb_root holes_size;
+ struct rb_root_cached holes_size;
struct rb_root holes_addr;
unsigned long scan_active;