2 * Copyright (c) 2018 Limelight Networks, Inc.
3 * Copyright (c) 2014-2018 Mellanox Technologies, Ltd.
4 * Copyright (c) 2015 François Tigeot
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _LINUXKPI_LINUX_KTIME_H
32 #define _LINUXKPI_LINUX_KTIME_H
34 #include <linux/types.h>
35 #include <linux/time.h>
36 #include <linux/jiffies.h>
38 /* time values in nanoseconds */
41 #define KTIME_MAX ((s64)~((u64)1 << 63))
42 #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
45 ktime_to_ns(ktime_t kt)
51 ns_to_ktime(uint64_t nsec)
57 ktime_divns(const ktime_t kt, int64_t div)
63 ktime_to_us(ktime_t kt)
65 return (ktime_divns(kt, NSEC_PER_USEC));
69 ktime_to_ms(ktime_t kt)
71 return (ktime_divns(kt, NSEC_PER_MSEC));
74 static inline struct timeval
75 ktime_to_timeval(ktime_t kt)
77 return (ns_to_timeval(kt));
81 ktime_add_ns(ktime_t kt, int64_t ns)
87 ktime_add_ms(ktime_t kt, int64_t ms)
90 return (ktime_add_ns(kt, ms * NSEC_PER_MSEC));
94 ktime_add_us(ktime_t kt, int64_t us)
97 return (ktime_add_ns(kt, us * NSEC_PER_USEC));
100 static inline ktime_t
101 ktime_sub_ns(ktime_t kt, int64_t ns)
106 static inline ktime_t
107 ktime_set(const long secs, const unsigned long nsecs)
109 ktime_t retval = {(s64) secs * NSEC_PER_SEC + (s64) nsecs};
114 static inline ktime_t
115 ktime_sub(ktime_t lhs, ktime_t rhs)
120 static inline int64_t
121 ktime_us_delta(ktime_t later, ktime_t earlier)
123 ktime_t diff = ktime_sub(later, earlier);
125 return (ktime_to_us(diff));
128 static inline int64_t
129 ktime_ms_delta(ktime_t later, ktime_t earlier)
131 ktime_t diff = ktime_sub(later, earlier);
133 return (ktime_to_ms(diff));
136 static inline ktime_t
137 ktime_add(ktime_t lhs, ktime_t rhs)
143 ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
148 else if (cmp1 < cmp2)
155 ktime_after(const ktime_t cmp1, const ktime_t cmp2)
158 return (ktime_compare(cmp1, cmp2) > 0);
162 ktime_before(const ktime_t cmp1, const ktime_t cmp2)
165 return (ktime_compare(cmp1, cmp2) < 0);
168 static inline ktime_t
169 timespec_to_ktime(struct timespec ts)
171 return (ktime_set(ts.tv_sec, ts.tv_nsec));
174 static inline ktime_t
175 timeval_to_ktime(struct timeval tv)
177 return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
180 static inline int64_t
181 timespec64_to_ns(struct timespec64 *ts)
183 return (timespec_to_ns(ts));
186 #define ktime_to_timespec(kt) ns_to_timespec(kt)
187 #define ktime_to_timespec64(kt) ns_to_timespec(kt)
188 #define ktime_to_timeval(kt) ns_to_timeval(kt)
189 #define ktime_to_ns(kt) (kt)
190 #define ktime_get_ts(ts) getnanouptime(ts)
191 #define ktime_get_ts64(ts) getnanouptime(ts)
192 #define ktime_get_raw_ts64(ts) getnanouptime(ts)
193 #define getrawmonotonic64(ts) getnanouptime(ts)
195 static inline int64_t
202 return (ktime_to_ns(timespec_to_ktime(ts)));
205 static inline ktime_t
211 return (timespec_to_ktime(ts));
214 static inline ktime_t
215 ktime_get_boottime(void)
220 return (timespec_to_ktime(ts));
223 static inline uint64_t
224 ktime_get_boottime_ns(void)
227 return (ktime_to_ns(ktime_get_boottime()));
230 static inline ktime_t
236 return (timespec_to_ktime(ts));
239 static inline ktime_t
240 ktime_get_real_seconds(void)
248 static inline ktime_t
254 return (timespec_to_ktime(ts));
258 ktime_get_raw_ns(void)
263 return (ktime_to_ns(timespec_to_ktime(ts)));
266 #endif /* _LINUXKPI_LINUX_KTIME_H */