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 */ |
63 | |