1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 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 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_JIFFIES_H_ 32 #define _LINUX_JIFFIES_H_ 33 34 #include <linux/types.h> 35 #include <linux/kernel.h> 36 #include <linux/time.h> 37 38 #include <sys/time.h> 39 #include <sys/kernel.h> 40 #include <sys/limits.h> 41 42 static inline int 43 msecs_to_jiffies(int msec) 44 { 45 struct timeval tv; 46 47 tv.tv_sec = msec / 1000; 48 tv.tv_usec = (msec % 1000) * 1000; 49 return (tvtohz(&tv) - 1); 50 } 51 52 #define jiffies ticks 53 #define jiffies_64 ticks 54 #define jiffies_to_msecs(x) (((int64_t)(x)) * 1000 / hz) 55 56 #define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1) 57 58 #define time_after(a, b) ((int)((b) - (a)) < 0) 59 #define time_before(a, b) time_after(b,a) 60 #define time_after_eq(a, b) ((int)((a) - (b)) >= 0) 61 #define time_before_eq(a, b) time_after_eq(b, a) 62 #define time_in_range(a,b,c) \ 63 (time_after_eq(a,b) && time_before_eq(a,c)) 64 65 #define HZ hz 66 67 static inline int 68 timespec_to_jiffies(const struct timespec *ts) 69 { 70 u64 result; 71 72 result = ((u64)hz * ts->tv_sec) + 73 (((u64)hz * ts->tv_nsec + NSEC_PER_SEC - 1) / NSEC_PER_SEC); 74 if (result > MAX_JIFFY_OFFSET) 75 result = MAX_JIFFY_OFFSET; 76 77 return ((int)result); 78 } 79 80 static inline int 81 usecs_to_jiffies(const unsigned int u) 82 { 83 u64 result; 84 85 result = ((u64)u * hz + 1000000 - 1) / 1000000; 86 if (result > MAX_JIFFY_OFFSET) 87 result = MAX_JIFFY_OFFSET; 88 89 return ((int)result); 90 } 91 92 static inline u64 93 get_jiffies_64(void) 94 { 95 return ((u64)(unsigned)ticks); 96 } 97 98 #endif /* _LINUX_JIFFIES_H_ */ 99