sw_sync.h revision bbd9ae8a05e05a608ff9158cf3b95be7b857a6fa 
1/*
2 * include/linux/sw_sync.h
3 *
4 * Copyright (C) 2012 Google, Inc.
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 */
16
17#ifndef _LINUX_SW_SYNC_H
18#define _LINUX_SW_SYNC_H
19
20#include <linux/types.h>
21
22#ifdef __KERNEL__
23
24#include "sync.h"
25
26struct sw_sync_timeline {
27	struct	sync_timeline	obj;
28
29	u32			value;
30};
31
32struct sw_sync_pt {
33	struct sync_pt		pt;
34
35	u32			value;
36};
37
38#if IS_ENABLED(CONFIG_SW_SYNC)
39struct sw_sync_timeline *sw_sync_timeline_create(const char *name);
40void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc);
41
42struct sync_pt *sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value);
43#else
44static inline struct sw_sync_timeline *sw_sync_timeline_create(const char *name)
45{
46	return NULL;
47}
48
49static inline void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc)
50{
51}
52
53static inline struct sync_pt *sw_sync_pt_create(struct sw_sync_timeline *obj,
54		u32 value)
55{
56	return NULL;
57}
58#endif /* IS_ENABLED(CONFIG_SW_SYNC) */
59
60#endif /* __KERNEL __ */
61
62struct sw_sync_create_fence_data {
63	__u32	value;
64	char	name[32];
65	__s32	fence; /* fd of new fence */
66};
67
68#define SW_SYNC_IOC_MAGIC	'W'
69
70#define SW_SYNC_IOC_CREATE_FENCE	_IOWR(SW_SYNC_IOC_MAGIC, 0,\
71		struct sw_sync_create_fence_data)
72#define SW_SYNC_IOC_INC			_IOW(SW_SYNC_IOC_MAGIC, 1, __u32)
73
74
75#endif /* _LINUX_SW_SYNC_H */
76