1 /*
2 * Sync File validation framework and debug infomation
3 *
4 * Copyright (C) 2012 Google, Inc.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 */
12
13 #ifndef _LINUX_SYNC_H
14 #define _LINUX_SYNC_H
15
16 #include <linux/list.h>
17 #include <linux/rbtree.h>
18 #include <linux/spinlock.h>
19 #include <linux/dma-fence.h>
20
21 #include <linux/sync_file.h>
22 #include <uapi/linux/sync_file.h>
23
24 /**
25 * struct sync_timeline - sync object
26 * @kref: reference count on fence.
27 * @name: name of the sync_timeline. Useful for debugging
28 * @lock: lock protecting @pt_list and @value
29 * @pt_tree: rbtree of active (unsignaled/errored) sync_pts
30 * @pt_list: list of active (unsignaled/errored) sync_pts
31 * @sync_timeline_list: membership in global sync_timeline_list
32 */
33 struct sync_timeline {
34 struct kref kref;
35 char name[32];
36
37 /* protected by lock */
38 u64 context;
39 int value;
40
41 struct rb_root pt_tree;
42 struct list_head pt_list;
43 spinlock_t lock;
44
45 struct list_head sync_timeline_list;
46 };
47
48 static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence)
49 {
50 return container_of(fence->lock, struct sync_timeline, lock);
51 }
52
53 /**
54 * struct sync_pt - sync_pt object
55 * @base: base fence object
56 * @link: link on the sync timeline's list
57 * @node: node in the sync timeline's tree
58 */
59 struct sync_pt {
60 struct dma_fence base;
61 struct list_head link;
62 struct rb_node node;
63 };
64
65 extern const struct file_operations sw_sync_debugfs_fops;
66
67 void sync_timeline_debug_add(struct sync_timeline *obj);
68 void sync_timeline_debug_remove(struct sync_timeline *obj);
69 void sync_file_debug_add(struct sync_file *fence);
70 void sync_file_debug_remove(struct sync_file *fence);
71
72 #endif /* _LINUX_SYNC_H */