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 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 struct timer_list { 40 struct callout timer_callout; 41 void (*function)(unsigned long); 42 unsigned long data; 43 unsigned long expires; 44 struct lwkt_token timer_token; 45 }; 46 47 static inline void 48 _timer_fn(void *context) 49 { 50 struct timer_list *timer; 51 52 timer = context; 53 timer->function(timer->data); 54 } 55 56 #define setup_timer(timer, func, dat) \ 57 do { \ 58 (timer)->function = (func); \ 59 (timer)->data = (dat); \ 60 lwkt_token_init(&(timer)->timer_token, "timer token"); \ 61 callout_init_mp(&(timer)->timer_callout); \ 62 } while (0) 63 64 #define init_timer(timer) \ 65 do { \ 66 (timer)->function = NULL; \ 67 (timer)->data = 0; \ 68 lwkt_token_init(&(timer)->timer_token, "timer token"); \ 69 callout_init_mp(&(timer)->timer_callout); \ 70 } while (0) 71 72 #define mod_timer(timer, exp) \ 73 do { \ 74 (timer)->expires = (exp); \ 75 lwkt_gettoken(&(timer)->timer_token); \ 76 callout_reset(&(timer)->timer_callout, (exp) - jiffies, \ 77 _timer_fn, (timer)); \ 78 lwkt_reltoken(&(timer)->timer_token); \ 79 } while (0) 80 81 #define add_timer(timer) \ 82 lwkt_gettoken(&(timer)->timer_token); \ 83 callout_reset(&(timer)->timer_callout, \ 84 (timer)->expires - jiffies, _timer_fn, (timer)); \ 85 lwkt_reltoken(&(timer)->timer_token); 86 87 static inline void 88 del_timer(struct timer_list *timer) 89 { 90 lwkt_gettoken(&(timer)->timer_token); 91 callout_stop(&(timer)->timer_callout); 92 lwkt_reltoken(&(timer)->timer_token); 93 94 lwkt_token_uninit(&(timer)->timer_token); 95 } 96 97 #define del_timer_sync(timer) callout_drain(&(timer)->timer_callout) 98 99 #define timer_pending(timer) callout_pending(&(timer)->timer_callout) 100 101 static inline unsigned long 102 round_jiffies(unsigned long j) 103 { 104 return roundup(j, hz); 105 } 106 107 static inline unsigned long 108 round_jiffies_up(unsigned long j) 109 { 110 return roundup(j, hz); 111 } 112 113 static inline unsigned long 114 round_jiffies_up_relative(unsigned long j) 115 { 116 return roundup(j, hz); 117 } 118 119 #endif /* _LINUX_TIMER_H_ */ 120