1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef	_LINUX_WAIT_H_
30#define	_LINUX_WAIT_H_
31
32#include <linux/spinlock.h>
33#include <linux/sched.h>
34#include <linux/list.h>
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/sleepqueue.h>
39#include <sys/kernel.h>
40#include <sys/proc.h>
41
42struct __wait_queue_head {
43	unsigned int	wchan;
44};
45typedef struct __wait_queue_head wait_queue_head_t;
46
47#define	init_waitqueue_head(x)
48
49static inline void
50__wake_up(struct __wait_queue_head *q, int all)
51{
52	int wakeup_swapper;
53	void *c;
54
55	c = &q->wchan;
56	sleepq_lock(c);
57	if (all)
58		wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
59	else
60		wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
61	sleepq_release(c);
62	if (wakeup_swapper)
63		kick_proc0();
64}
65
66#define	wake_up(q)				__wake_up(q, 0)
67#define	wake_up_nr(q, nr)			__wake_up(q, 1)
68#define	wake_up_all(q)				__wake_up(q, 1)
69#define	wake_up_interruptible(q)		__wake_up(q, 0)
70#define	wake_up_interruptible_nr(q, nr)		__wake_up(q, 1)
71#define	wake_up_interruptible_all(q, nr)	__wake_up(q, 1)
72
73#define	wait_event(q, cond)						\
74do {									\
75	void *c = &(q).wchan;						\
76	if (!(cond)) {							\
77		for (;;) {						\
78			sleepq_lock(c);					\
79			if (cond) {					\
80				sleepq_release(c);			\
81				break;					\
82			}						\
83			sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
84			sleepq_wait(c, 0);				\
85		}							\
86	}								\
87} while (0)
88
89#define	wait_event_interruptible(q, cond)				\
90({									\
91	void *c = &(q).wchan;						\
92	int _error;							\
93									\
94	_error = 0;							\
95	if (!(cond)) {							\
96		for (; _error == 0;) {					\
97			sleepq_lock(c);					\
98			if (cond) {					\
99				sleepq_release(c);			\
100				break;					\
101			}						\
102			sleepq_add(c, NULL, "completion",		\
103			    SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0);	\
104			if (sleepq_wait_sig(c, 0))			\
105				_error = -ERESTARTSYS;			\
106		}							\
107	}								\
108	-_error;							\
109})
110
111#define	DEFINE_WAIT(x)
112
113#endif	/* _LINUX_WAIT_H_ */
114