1 /*
2 * include/linux/sync_file.h
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_FILE_H
14 #define _LINUX_SYNC_FILE_H
15
16 #include <linux/types.h>
17 #include <linux/ktime.h>
18 #include <linux/list.h>
19 #include <linux/spinlock.h>
20 #include <linux/dma-fence.h>
21 #include <linux/dma-fence-array.h>
22
23 /**
24 * struct sync_file - sync file to export to the userspace
25 * @file: file representing this fence
26 * @sync_file_list: membership in global file list
27 * @wq: wait queue for fence signaling
28 * @flags: flags for the sync_file
29 * @fence: fence with the fences in the sync_file
30 * @cb: fence callback information
31 *
32 * flags:
33 * POLL_ENABLED: whether userspace is currently poll()'ing or not
34 */
35 struct sync_file {
36 struct file *file;
37 /**
38 * @user_name:
39 *
40 * Name of the sync file provided by userspace, for merged fences.
41 * Otherwise generated through driver callbacks (in which case the
42 * entire array is 0).
43 */
44 char user_name[32];
45 #ifdef CONFIG_DEBUG_FS
46 struct list_head sync_file_list;
47 #endif
48
49 wait_queue_head_t wq;
50 unsigned long flags;
51
52 struct dma_fence *fence;
53 struct dma_fence_cb cb;
54 };
55
56 #define POLL_ENABLED 0
57
58 struct sync_file *sync_file_create(struct dma_fence *fence);
59 struct dma_fence *sync_file_get_fence(int fd);
60 char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len);
61
62 #endif /* _LINUX_SYNC_H */