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-rw-r--r--include/drm/drm_mm.h49
1 files changed, 37 insertions, 12 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index e391777..b1e7809 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -42,23 +42,25 @@
#endif
struct drm_mm_node {
- struct list_head free_stack;
struct list_head node_list;
- unsigned free : 1;
+ struct list_head hole_stack;
+ unsigned hole_follows : 1;
unsigned scanned_block : 1;
unsigned scanned_prev_free : 1;
unsigned scanned_next_free : 1;
+ unsigned scanned_preceeds_hole : 1;
+ unsigned allocated : 1;
unsigned long start;
unsigned long size;
struct drm_mm *mm;
};
struct drm_mm {
- /* List of free memory blocks, most recently freed ordered. */
- struct list_head free_stack;
- /* List of all memory nodes, ordered according to the (increasing) start
- * address of the memory node. */
- struct list_head node_list;
+ /* List of all memory nodes that immediatly preceed a free hole. */
+ struct list_head hole_stack;
+ /* head_node.node_list is the list of all memory nodes, ordered
+ * according to the (increasing) start address of the memory node. */
+ struct drm_mm_node head_node;
struct list_head unused_nodes;
int num_unused;
spinlock_t unused_lock;
@@ -70,8 +72,28 @@ struct drm_mm {
unsigned scanned_blocks;
unsigned long scan_start;
unsigned long scan_end;
+ struct drm_mm_node *prev_scanned_node;
};
+static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
+{
+ return node->allocated;
+}
+
+static inline bool drm_mm_initialized(struct drm_mm *mm)
+{
+ return mm->hole_stack.next;
+}
+#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
+ &(mm)->head_node.node_list, \
+ node_list);
+#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
+ for (entry = (mm)->prev_scanned_node, \
+ next = entry ? list_entry(entry->node_list.next, \
+ struct drm_mm_node, node_list) : NULL; \
+ entry != NULL; entry = next, \
+ next = entry ? list_entry(entry->node_list.next, \
+ struct drm_mm_node, node_list) : NULL) \
/*
* Basic range manager support (drm_mm.c)
*/
@@ -118,7 +140,15 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
return drm_mm_get_block_range_generic(parent, size, alignment,
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_in_range(struct drm_mm *mm,
+ struct drm_mm_node *node,
+ unsigned long size, unsigned alignment,
+ 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);
extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
unsigned long size,
unsigned alignment,
@@ -134,11 +164,6 @@ extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);
extern int drm_mm_clean(struct drm_mm *mm);
-extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
-extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
- unsigned long size);
-extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
- unsigned long size, int atomic);
extern int drm_mm_pre_get(struct drm_mm *mm);
static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)