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 ktime_t 55 ns_to_ktime(uint64_t nsec) 56 { 57 ktime_t kt; 58 59 kt.tv64 = nsec; 60 return (kt); 61 } 62 63 static inline int64_t 64 ktime_divns(const ktime_t kt, int64_t div) 65 { 66 return kt.tv64 / div; 67 } 68 69 static inline int64_t 70 ktime_to_us(ktime_t kt) 71 { 72 return ktime_divns(kt, NSEC_PER_USEC); 73 } 74 75 static inline int64_t 76 ktime_to_ms(ktime_t kt) 77 { 78 return ktime_divns(kt, NSEC_PER_MSEC); 79 } 80 81 static inline struct timeval 82 ktime_to_timeval(ktime_t kt) 83 { 84 return ns_to_timeval(kt.tv64); 85 } 86 87 static inline ktime_t 88 ktime_add_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_sub_ns(ktime_t kt, int64_t ns) 98 { 99 ktime_t res; 100 101 res.tv64 = kt.tv64 - ns; 102 return kt; 103 } 104 105 static inline ktime_t 106 ktime_set(const long secs, const unsigned long nsecs) 107 { 108 ktime_t retval = { (s64)secs * NSEC_PER_SEC + (s64)nsecs }; 109 return (retval); 110 } 111 112 static inline ktime_t 113 ktime_sub(ktime_t lhs, ktime_t rhs) 114 { 115 lhs.tv64 -= rhs.tv64; 116 return (lhs); 117 } 118 119 static inline int64_t 120 ktime_us_delta(ktime_t later, ktime_t earlier) 121 { 122 ktime_t diff = ktime_sub(later, earlier); 123 return ktime_to_us(diff); 124 } 125 126 static inline int64_t 127 ktime_ms_delta(ktime_t later, ktime_t earlier) 128 { 129 ktime_t diff = ktime_sub(later, earlier); 130 return ktime_to_ms(diff); 131 } 132 133 static inline ktime_t 134 ktime_add(ktime_t lhs, ktime_t rhs) 135 { 136 lhs.tv64 += rhs.tv64; 137 return (lhs); 138 } 139 140 static inline ktime_t 141 timespec_to_ktime(struct timespec ts) 142 { 143 return (ktime_set(ts.tv_sec, ts.tv_nsec)); 144 } 145 146 static inline ktime_t 147 timeval_to_ktime(struct timeval tv) 148 { 149 return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC)); 150 } 151 152 #define ktime_to_timespec(kt) ns_to_timespec((kt).tv64) 153 #define ktime_to_timeval(kt) ns_to_timeval((kt).tv64) 154 #define ktime_to_ns(kt) ((kt).tv64) 155 156 static inline s64 157 ktime_get_ns(void) 158 { 159 struct timespec ts; 160 ktime_t kt; 161 162 ktime_get_ts(&ts); 163 kt = timespec_to_ktime(ts); 164 return (ktime_to_ns(kt)); 165 } 166 167 static inline ktime_t 168 ktime_get(void) 169 { 170 struct timespec ts; 171 172 ktime_get_ts(&ts); 173 return (timespec_to_ktime(ts)); 174 } 175 176 #endif /* _LINUX_KTIME_H */ 177