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 init_timer(timer) \ 67 do { \ 68 (timer)->function = NULL; \ 69 (timer)->data = 0; \ 70 lwkt_token_init(&(timer)->timer_token, "timer token"); \ 71 callout_init_mp(&(timer)->timer_callout); \ 72 } while (0) 73 74 #define mod_timer(timer, exp) \ 75 do { \ 76 (timer)->expires = (exp); \ 77 lwkt_gettoken(&(timer)->timer_token); \ 78 callout_reset(&(timer)->timer_callout, (exp) - jiffies, \ 79 _timer_fn, (timer)); \ 80 lwkt_reltoken(&(timer)->timer_token); \ 81 } while (0) 82 83 #define mod_timer_pinned(timer, exp) mod_timer(timer, exp) 84 85 #define add_timer(timer) \ 86 lwkt_gettoken(&(timer)->timer_token); \ 87 callout_reset(&(timer)->timer_callout, \ 88 (timer)->expires - jiffies, _timer_fn, (timer)); \ 89 lwkt_reltoken(&(timer)->timer_token); 90 91 static inline void 92 del_timer(struct timer_list *timer) 93 { 94 lwkt_gettoken(&(timer)->timer_token); 95 callout_stop(&(timer)->timer_callout); 96 lwkt_reltoken(&(timer)->timer_token); 97 98 lwkt_token_uninit(&(timer)->timer_token); 99 } 100 101 #define del_timer_sync(timer) callout_drain(&(timer)->timer_callout) 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 #endif /* _LINUX_TIMER_H_ */ 126