1 /*
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2014-2020 François Tigeot <ftigeot@wolfpond.org>
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_TIMER_H_
30 #define _LINUX_TIMER_H_
31
32 #include <linux/list.h>
33 #include <linux/ktime.h>
34 #include <linux/stddef.h>
35 #include <linux/stringify.h>
36
37 #include <sys/callout.h>
38
39 struct timer_list {
40 struct callout timer_callout;
41 void (*function)(unsigned long);
42 unsigned long data;
43 unsigned long expires;
44 };
45
46 static inline void
_timer_fn(void * context)47 _timer_fn(void *context)
48 {
49 struct timer_list *timer;
50
51 timer = context;
52 timer->function(timer->data);
53 }
54
55 #define setup_timer(timer, func, dat) \
56 do { \
57 (timer)->function = (func); \
58 (timer)->data = (dat); \
59 callout_init_mp(&(timer)->timer_callout); \
60 } while (0)
61
62 #define setup_timer_on_stack(t, f,d) setup_timer(t, f, d)
63
64 #define __setup_timer(timer, func, data, flags) \
65 do { \
66 setup_timer(timer, func, data); \
67 } while (0)
68
69 #define init_timer(timer) \
70 do { \
71 (timer)->function = NULL; \
72 (timer)->data = 0; \
73 callout_init_mp(&(timer)->timer_callout); \
74 } while (0)
75
76 #define mod_timer(timer, exp) \
77 do { \
78 (timer)->expires = (exp); \
79 callout_reset(&(timer)->timer_callout, (exp) - jiffies, \
80 _timer_fn, (timer)); \
81 } while (0)
82
83 #define mod_timer_pinned(timer, exp) mod_timer(timer, exp)
84
85 #define add_timer(timer) \
86 callout_reset(&(timer)->timer_callout, \
87 (timer)->expires - jiffies, _timer_fn, (timer)); \
88
89 static inline void
del_timer(struct timer_list * timer)90 del_timer(struct timer_list *timer)
91 {
92 callout_stop(&(timer)->timer_callout);
93 }
94
95 static inline int
del_timer_sync(struct timer_list * timer)96 del_timer_sync(struct timer_list *timer)
97 {
98 return callout_drain(&(timer)->timer_callout) == 0;
99 }
100
101 #define del_singleshot_timer_sync(timer) del_timer_sync(timer)
102
103 #define timer_pending(timer) callout_pending(&(timer)->timer_callout)
104
105 static inline unsigned long
round_jiffies(unsigned long j)106 round_jiffies(unsigned long j)
107 {
108 return roundup(j, hz);
109 }
110
111 static inline unsigned long
round_jiffies_up(unsigned long j)112 round_jiffies_up(unsigned long j)
113 {
114 return roundup(j, hz);
115 }
116
117 static inline unsigned long
round_jiffies_up_relative(unsigned long j)118 round_jiffies_up_relative(unsigned long j)
119 {
120 return roundup(j, hz);
121 }
122
123 #define destroy_timer_on_stack(timer)
124
125 #define TIMER_IRQSAFE 0x00200000
126
127 #define from_timer(var, arg, field) \
128 container_of(arg, typeof(*(var)), field)
129
130 static inline void
timer_setup(struct timer_list * timer,void (* callback)(struct timer_list *),unsigned int flags)131 timer_setup(struct timer_list *timer,
132 void (*callback)(struct timer_list *),
133 unsigned int flags)
134 {
135 setup_timer(timer,
136 (void (*)(unsigned long))callback,
137 (unsigned long)timer);
138 }
139
140 #endif /* _LINUX_TIMER_H_ */
141