linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
2 /*
3 * Copyright (C) 2012 Google, Inc.
4 *
5 * This program is distributed in the hope that it will be useful,
6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
8 * GNU General Public License for more details.
9 *
10 */
11
12 #ifndef _LINUX_SYNC_H
13 #define _LINUX_SYNC_H
14
15 #include <linux/ioctl.h>
16 #include <linux/types.h>
17
18 /**
19 * struct sync_merge_data - SYNC_IOC_MERGE: merge two fences
20 * @name: name of new fence
21 * @fd2: file descriptor of second fence
22 * @fence: returns the fd of the new fence to userspace
23 * @flags: merge_data flags
24 * @pad: padding for 64-bit alignment, should always be zero
25 *
26 * Creates a new fence containing copies of the sync_pts in both
27 * the calling fd and sync_merge_data.fd2. Returns the new fence's
28 * fd in sync_merge_data.fence
29 */
30 struct sync_merge_data {
31 char name[32];
32 __s32 fd2;
33 __s32 fence;
34 __u32 flags;
35 __u32 pad;
36 };
37
38 /**
39 * struct sync_fence_info - detailed fence information
40 * @obj_name: name of parent sync_timeline
41 * @driver_name: name of driver implementing the parent
42 * @status: status of the fence 0:active 1:signaled <0:error
43 * @flags: fence_info flags
44 * @timestamp_ns: timestamp of status change in nanoseconds
45 */
46 struct sync_fence_info {
47 char obj_name[32];
48 char driver_name[32];
49 __s32 status;
50 __u32 flags;
51 __u64 timestamp_ns;
52 };
53
54 /**
55 * struct sync_file_info - SYNC_IOC_FILE_INFO: get detailed information on a sync_file
56 * @name: name of fence
57 * @status: status of fence. 1: signaled 0:active <0:error
58 * @flags: sync_file_info flags
59 * @num_fences number of fences in the sync_file
60 * @pad: padding for 64-bit alignment, should always be zero
61 * @sync_fence_info: pointer to array of struct &sync_fence_info with all
62 * fences in the sync_file
63 *
64 * Takes a struct sync_file_info. If num_fences is 0, the field is updated
65 * with the actual number of fences. If num_fences is > 0, the system will
66 * use the pointer provided on sync_fence_info to return up to num_fences of
67 * struct sync_fence_info, with detailed fence information.
68 */
69 struct sync_file_info {
70 char name[32];
71 __s32 status;
72 __u32 flags;
73 __u32 num_fences;
74 __u32 pad;
75
76 __u64 sync_fence_info;
77 };
78
79 #define SYNC_IOC_MAGIC '>'
80
81 /*
82 * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
83 * old API to get weird errors when trying to handling sync_files. The API
84 * change happened during the de-stage of the Sync Framework when there was
85 * no upstream users available.
86 */
87
88 #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
89 #define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
90
91 #endif /* _LINUX_SYNC_H */
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