ktime.h revision 300498 
1/*-
2 * Copyright (c) 2014-2015 Mellanox Technologies, Ltd.
3 * Copyright (c) 2015 Fran��ois 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: head/sys/compat/linuxkpi/common/include/linux/ktime.h 300498 2016-05-23 12:10:28Z hselasky $
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 */
39union ktime {
40	int64_t tv64;
41};
42
43typedef union ktime ktime_t;
44
45#define KTIME_MAX                       ((s64)~((u64)1 << 63))
46#define KTIME_SEC_MAX                   (KTIME_MAX / NSEC_PER_SEC)
47
48static inline int64_t
49ktime_to_ns(ktime_t kt)
50{
51	return kt.tv64;
52}
53
54static inline int64_t
55ktime_divns(const ktime_t kt, int64_t div)
56{
57	return kt.tv64 / div;
58}
59
60static inline int64_t
61ktime_to_us(ktime_t kt)
62{
63        return ktime_divns(kt, NSEC_PER_USEC);
64}
65
66static inline int64_t
67ktime_to_ms(ktime_t kt)
68{
69        return ktime_divns(kt, NSEC_PER_MSEC);
70}
71
72static inline struct timeval
73ktime_to_timeval(ktime_t kt)
74{
75	return ns_to_timeval(kt.tv64);
76}
77
78static inline ktime_t
79ktime_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
87static inline ktime_t
88ktime_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
96static inline ktime_t
97ktime_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
103static inline ktime_t
104ktime_sub(ktime_t lhs, ktime_t rhs)
105{
106	lhs.tv64 -= rhs.tv64;
107	return (lhs);
108}
109
110static inline int64_t
111ktime_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
117static inline int64_t
118ktime_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
124static inline ktime_t
125ktime_add(ktime_t lhs, ktime_t rhs)
126{
127	lhs.tv64 += rhs.tv64;
128	return (lhs);
129}
130
131static inline ktime_t
132timespec_to_ktime(struct timespec ts)
133{
134	return (ktime_set(ts.tv_sec, ts.tv_nsec));
135}
136
137static inline ktime_t
138timeval_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
147static inline s64
148ktime_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
158static inline ktime_t
159ktime_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