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 */
33struct 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
48static 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 */
59struct sync_pt {
60 struct dma_fence base;
61 struct list_head link;
62 struct rb_node node;
63};
64
65extern const struct file_operations sw_sync_debugfs_fops;
66
67void sync_timeline_debug_add(struct sync_timeline *obj);
68void sync_timeline_debug_remove(struct sync_timeline *obj);
69void sync_file_debug_add(struct sync_file *fence);
70void sync_file_debug_remove(struct sync_file *fence);
71void sync_dump(void);
72
73#endif /* _LINUX_SYNC_H */
74