drm: Import linux/timer.h from FreeBSD's OFED stack
[dragonfly.git] / sys / dev / drm / include / linux / timer.h
1 /*-
2  * Copyright (c) 2010 Isilon Systems, Inc.
3  * Copyright (c) 2010 iX Systems, Inc.
4  * Copyright (c) 2010 Panasas, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice unmodified, this list of conditions, and the following
12  *    disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 #ifndef _LINUX_TIMER_H_
29 #define _LINUX_TIMER_H_
30
31 #include <linux/types.h>
32
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/callout.h>
36
37 struct timer_list {
38         struct callout  timer_callout;
39         void            (*function)(unsigned long);
40         unsigned long   data;
41         unsigned long   expires;
42 };
43
44 static inline void
45 _timer_fn(void *context)
46 {
47         struct timer_list *timer;
48
49         timer = context;
50         timer->function(timer->data);
51 }
52
53 #define setup_timer(timer, func, dat)                                   \
54 do {                                                                    \
55         (timer)->function = (func);                                     \
56         (timer)->data = (dat);                                          \
57         callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);          \
58 } while (0)
59
60 #define init_timer(timer)                                               \
61 do {                                                                    \
62         (timer)->function = NULL;                                       \
63         (timer)->data = 0;                                              \
64         callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);          \
65 } while (0)
66
67 #define mod_timer(timer, exp)                                           \
68 do {                                                                    \
69         (timer)->expires = (exp);                                       \
70         callout_reset(&(timer)->timer_callout, (exp) - jiffies,         \
71             _timer_fn, (timer));                                        \
72 } while (0)
73
74 #define add_timer(timer)                                                \
75         callout_reset(&(timer)->timer_callout,                          \
76             (timer)->expires - jiffies, _timer_fn, (timer))
77
78 #define del_timer(timer)        callout_stop(&(timer)->timer_callout)
79 #define del_timer_sync(timer)   callout_drain(&(timer)->timer_callout)
80
81 #define timer_pending(timer)    callout_pending(&(timer)->timer_callout)
82
83 static inline unsigned long
84 round_jiffies(unsigned long j)
85 {
86         return roundup(j, hz);
87 }
88
89 #endif /* _LINUX_TIMER_H_ */