ktime.h revision 329977 
1/*-
2 * Copyright (c) 2018 Limelight Networks, Inc.
3 * Copyright (c) 2014-2018 Mellanox Technologies, Ltd.
4 * Copyright (c) 2015 Fran��ois Tigeot
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
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.
16 *
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.
27 *
28 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/ktime.h 329977 2018-02-25 10:44:47Z hselasky $
29 */
30
31#ifndef _LINUX_KTIME_H
32#define	_LINUX_KTIME_H
33
34#include <linux/types.h>
35#include <linux/time.h>
36#include <linux/jiffies.h>
37
38#define	ktime_get_ts(x) getnanouptime(x)
39
40/* time values in nanoseconds */
41typedef s64 ktime_t;
42
43#define	KTIME_MAX                       ((s64)~((u64)1 << 63))
44#define	KTIME_SEC_MAX                   (KTIME_MAX / NSEC_PER_SEC)
45
46static inline int64_t
47ktime_to_ns(ktime_t kt)
48{
49	return (kt);
50}
51
52static inline ktime_t
53ns_to_ktime(uint64_t nsec)
54{
55	return (nsec);
56}
57
58static inline int64_t
59ktime_divns(const ktime_t kt, int64_t div)
60{
61	return (kt / div);
62}
63
64static inline int64_t
65ktime_to_us(ktime_t kt)
66{
67	return (ktime_divns(kt, NSEC_PER_USEC));
68}
69
70static inline int64_t
71ktime_to_ms(ktime_t kt)
72{
73	return (ktime_divns(kt, NSEC_PER_MSEC));
74}
75
76static inline struct timeval
77ktime_to_timeval(ktime_t kt)
78{
79	return (ns_to_timeval(kt));
80}
81
82static inline ktime_t
83ktime_add_ns(ktime_t kt, int64_t ns)
84{
85	return (kt + ns);
86}
87
88static inline ktime_t
89ktime_sub_ns(ktime_t kt, int64_t ns)
90{
91	return (kt - ns);
92}
93
94static inline ktime_t
95ktime_set(const long secs, const unsigned long nsecs)
96{
97	ktime_t retval = {(s64) secs * NSEC_PER_SEC + (s64) nsecs};
98
99	return (retval);
100}
101
102static inline ktime_t
103ktime_sub(ktime_t lhs, ktime_t rhs)
104{
105	return (lhs - rhs);
106}
107
108static inline int64_t
109ktime_us_delta(ktime_t later, ktime_t earlier)
110{
111	ktime_t diff = ktime_sub(later, earlier);
112
113	return (ktime_to_us(diff));
114}
115
116static inline int64_t
117ktime_ms_delta(ktime_t later, ktime_t earlier)
118{
119	ktime_t diff = ktime_sub(later, earlier);
120
121	return (ktime_to_ms(diff));
122}
123
124static inline ktime_t
125ktime_add(ktime_t lhs, ktime_t rhs)
126{
127	return (lhs + rhs);
128}
129
130static inline ktime_t
131timespec_to_ktime(struct timespec ts)
132{
133	return (ktime_set(ts.tv_sec, ts.tv_nsec));
134}
135
136static inline ktime_t
137timeval_to_ktime(struct timeval tv)
138{
139	return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
140}
141
142#define	ktime_to_timespec(kt)		ns_to_timespec(kt)
143#define	ktime_to_timeval(kt)		ns_to_timeval(kt)
144#define	ktime_to_ns(kt)			(kt)
145
146static inline int64_t
147ktime_get_ns(void)
148{
149	struct timespec ts;
150
151	ktime_get_ts(&ts);
152
153	return (ktime_to_ns(timespec_to_ktime(ts)));
154}
155
156static inline ktime_t
157ktime_get(void)
158{
159	struct timespec ts;
160
161	ktime_get_ts(&ts);
162	return (timespec_to_ktime(ts));
163}
164
165static inline ktime_t
166ktime_get_boottime(void)
167{
168	struct timespec ts;
169
170	nanouptime(&ts);
171	return (timespec_to_ktime(ts));
172}
173
174static inline ktime_t
175ktime_get_real(void)
176{
177	struct timespec ts;
178
179	nanotime(&ts);
180	return (timespec_to_ktime(ts));
181}
182
183static inline ktime_t
184ktime_get_real_seconds(void)
185{
186	struct timespec ts;
187
188	nanotime(&ts);
189	return (ts.tv_sec);
190}
191
192static inline u64
193ktime_get_raw_ns(void)
194{
195	struct timespec ts;
196
197	nanouptime(&ts);
198	return (ktime_to_ns(timespec_to_ktime(ts)));
199}
200
201#endif /* _LINUX_KTIME_H */
202