1 /*- 2 * Copyright (c) 2014-2015 Mellanox Technologies, Ltd. 3 * Copyright (c) 2015 François Tigeot 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 #ifndef _LINUX_KTIME_H 30 #define _LINUX_KTIME_H 31 32 #include <linux/types.h> 33 #include <linux/time.h> 34 #include <linux/jiffies.h> 35 36 #define ktime_get_ts(x) getnanouptime(x) 37 38 /* time values in nanoseconds */ 39 union ktime { 40 int64_t tv64; 41 }; 42 43 typedef union ktime ktime_t; 44 45 #define KTIME_MAX ((s64)~((u64)1 << 63)) 46 #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC) 47 48 static inline int64_t 49 ktime_to_ns(ktime_t kt) 50 { 51 return kt.tv64; 52 } 53 54 static inline int64_t 55 ktime_divns(const ktime_t kt, int64_t div) 56 { 57 return kt.tv64 / div; 58 } 59 60 static inline int64_t 61 ktime_to_us(ktime_t kt) 62 { 63 return ktime_divns(kt, NSEC_PER_USEC); 64 } 65 66 static inline int64_t 67 ktime_to_ms(ktime_t kt) 68 { 69 return ktime_divns(kt, NSEC_PER_MSEC); 70 } 71 72 static inline struct timeval 73 ktime_to_timeval(ktime_t kt) 74 { 75 return ns_to_timeval(kt.tv64); 76 } 77 78 static inline ktime_t 79 ktime_add_ns(ktime_t kt, int64_t ns) 80 { 81 ktime_t res; 82 83 res.tv64 = kt.tv64 + ns; 84 return kt; 85 } 86 87 static inline ktime_t 88 ktime_sub_ns(ktime_t kt, int64_t ns) 89 { 90 ktime_t res; 91 92 res.tv64 = kt.tv64 - ns; 93 return kt; 94 } 95 96 static inline ktime_t 97 ktime_set(const long secs, const unsigned long nsecs) 98 { 99 ktime_t retval = { (s64)secs * NSEC_PER_SEC + (s64)nsecs }; 100 return (retval); 101 } 102 103 static inline ktime_t 104 ktime_sub(ktime_t lhs, ktime_t rhs) 105 { 106 lhs.tv64 -= rhs.tv64; 107 return (lhs); 108 } 109 110 static inline int64_t 111 ktime_us_delta(ktime_t later, ktime_t earlier) 112 { 113 ktime_t diff = ktime_sub(later, earlier); 114 return ktime_to_us(diff); 115 } 116 117 static inline int64_t 118 ktime_ms_delta(ktime_t later, ktime_t earlier) 119 { 120 ktime_t diff = ktime_sub(later, earlier); 121 return ktime_to_ms(diff); 122 } 123 124 static inline ktime_t 125 ktime_add(ktime_t lhs, ktime_t rhs) 126 { 127 lhs.tv64 += rhs.tv64; 128 return (lhs); 129 } 130 131 static inline ktime_t 132 timespec_to_ktime(struct timespec ts) 133 { 134 return (ktime_set(ts.tv_sec, ts.tv_nsec)); 135 } 136 137 static inline ktime_t 138 timeval_to_ktime(struct timeval tv) 139 { 140 return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC)); 141 } 142 143 #define ktime_to_timespec(kt) ns_to_timespec((kt).tv64) 144 #define ktime_to_timeval(kt) ns_to_timeval((kt).tv64) 145 #define ktime_to_ns(kt) ((kt).tv64) 146 147 static inline s64 148 ktime_get_ns(void) 149 { 150 struct timespec ts; 151 ktime_t kt; 152 153 ktime_get_ts(&ts); 154 kt = timespec_to_ktime(ts); 155 return (ktime_to_ns(kt)); 156 } 157 158 static inline ktime_t 159 ktime_get(void) 160 { 161 struct timespec ts; 162 163 ktime_get_ts(&ts); 164 return (timespec_to_ktime(ts)); 165 } 166 167 #endif /* _LINUX_KTIME_H */ 168