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 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 90 del_timer(struct timer_list *timer) 91 { 92 callout_stop(&(timer)->timer_callout); 93 } 94 95 static inline int 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 106 round_jiffies(unsigned long j) 107 { 108 return roundup(j, hz); 109 } 110 111 static inline unsigned long 112 round_jiffies_up(unsigned long j) 113 { 114 return roundup(j, hz); 115 } 116 117 static inline unsigned long 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 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