1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2014,2015 François Tigeot 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/types.h> 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/callout.h> 37 #include <sys/thread.h> 38 39 #include <linux/ktime.h> 40 41 struct timer_list { 42 struct callout timer_callout; 43 void (*function)(unsigned long); 44 unsigned long data; 45 unsigned long expires; 46 struct lwkt_token timer_token; 47 }; 48 49 static inline void 50 _timer_fn(void *context) 51 { 52 struct timer_list *timer; 53 54 timer = context; 55 timer->function(timer->data); 56 } 57 58 #define setup_timer(timer, func, dat) \ 59 do { \ 60 (timer)->function = (func); \ 61 (timer)->data = (dat); \ 62 lwkt_token_init(&(timer)->timer_token, "timer token"); \ 63 callout_init_mp(&(timer)->timer_callout); \ 64 } while (0) 65 66 #define setup_timer_on_stack(t, f,d) setup_timer(t, f, d) 67 68 #define init_timer(timer) \ 69 do { \ 70 (timer)->function = NULL; \ 71 (timer)->data = 0; \ 72 lwkt_token_init(&(timer)->timer_token, "timer token"); \ 73 callout_init_mp(&(timer)->timer_callout); \ 74 } while (0) 75 76 #define mod_timer(timer, exp) \ 77 do { \ 78 (timer)->expires = (exp); \ 79 lwkt_gettoken(&(timer)->timer_token); \ 80 callout_reset(&(timer)->timer_callout, (exp) - jiffies, \ 81 _timer_fn, (timer)); \ 82 lwkt_reltoken(&(timer)->timer_token); \ 83 } while (0) 84 85 #define mod_timer_pinned(timer, exp) mod_timer(timer, exp) 86 87 #define add_timer(timer) \ 88 lwkt_gettoken(&(timer)->timer_token); \ 89 callout_reset(&(timer)->timer_callout, \ 90 (timer)->expires - jiffies, _timer_fn, (timer)); \ 91 lwkt_reltoken(&(timer)->timer_token); 92 93 static inline void 94 del_timer(struct timer_list *timer) 95 { 96 lwkt_gettoken(&(timer)->timer_token); 97 callout_stop(&(timer)->timer_callout); 98 lwkt_reltoken(&(timer)->timer_token); 99 100 lwkt_token_uninit(&(timer)->timer_token); 101 } 102 103 static inline int 104 del_timer_sync(struct timer_list *timer) 105 { 106 return callout_drain(&(timer)->timer_callout) == 0; 107 } 108 109 #define del_singleshot_timer_sync(timer) del_timer_sync(timer) 110 111 #define timer_pending(timer) callout_pending(&(timer)->timer_callout) 112 113 static inline unsigned long 114 round_jiffies(unsigned long j) 115 { 116 return roundup(j, hz); 117 } 118 119 static inline unsigned long 120 round_jiffies_up(unsigned long j) 121 { 122 return roundup(j, hz); 123 } 124 125 static inline unsigned long 126 round_jiffies_up_relative(unsigned long j) 127 { 128 return roundup(j, hz); 129 } 130 131 #define destroy_timer_on_stack(timer) 132 133 #endif /* _LINUX_TIMER_H_ */ 134