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
ktime_to_ns(ktime_t kt)49 ktime_to_ns(ktime_t kt)
50 {
51 return kt.tv64;
52 }
53
54 static inline struct timeval
ktime_to_timeval(ktime_t kt)55 ktime_to_timeval(ktime_t kt)
56 {
57 return ns_to_timeval(kt.tv64);
58 }
59
60 static inline ktime_t
ktime_add_ns(ktime_t kt,int64_t ns)61 ktime_add_ns(ktime_t kt, int64_t ns)
62 {
63 ktime_t res;
64
65 res.tv64 = kt.tv64 + ns;
66 return kt;
67 }
68
69 static inline ktime_t
ktime_sub_ns(ktime_t kt,int64_t ns)70 ktime_sub_ns(ktime_t kt, int64_t ns)
71 {
72 ktime_t res;
73
74 res.tv64 = kt.tv64 - ns;
75 return kt;
76 }
77
78 static inline ktime_t
ktime_set(const long secs,const unsigned long nsecs)79 ktime_set(const long secs, const unsigned long nsecs)
80 {
81 ktime_t retval = { (s64)secs * NSEC_PER_SEC + (s64)nsecs };
82 return (retval);
83 }
84
85 static inline ktime_t
ktime_sub(ktime_t lhs,ktime_t rhs)86 ktime_sub(ktime_t lhs, ktime_t rhs)
87 {
88 lhs.tv64 -= rhs.tv64;
89 return (lhs);
90 }
91
92 static inline ktime_t
ktime_add(ktime_t lhs,ktime_t rhs)93 ktime_add(ktime_t lhs, ktime_t rhs)
94 {
95 lhs.tv64 += rhs.tv64;
96 return (lhs);
97 }
98
99 static inline ktime_t
timespec_to_ktime(struct timespec ts)100 timespec_to_ktime(struct timespec ts)
101 {
102 return (ktime_set(ts.tv_sec, ts.tv_nsec));
103 }
104
105 static inline ktime_t
timeval_to_ktime(struct timeval tv)106 timeval_to_ktime(struct timeval tv)
107 {
108 return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
109 }
110
111 #define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
112 #define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
113 #define ktime_to_ns(kt) ((kt).tv64)
114
115 static inline s64
ktime_get_ns(void)116 ktime_get_ns(void)
117 {
118 struct timespec ts;
119 ktime_t kt;
120
121 ktime_get_ts(&ts);
122 kt = timespec_to_ktime(ts);
123 return (ktime_to_ns(kt));
124 }
125
126 static inline ktime_t
ktime_get(void)127 ktime_get(void)
128 {
129 struct timespec ts;
130
131 ktime_get_ts(&ts);
132 return (timespec_to_ktime(ts));
133 }
134
135 #endif /* _LINUX_KTIME_H */
136