ktime.h revision 335429 
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 335429 2018-06-20 06:52:32Z 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 int
131ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
132{
133
134	if (cmp1 > cmp2)
135		return (1);
136	else if (cmp1 < cmp2)
137		return (-1);
138	else
139		return (0);
140}
141
142static inline bool
143ktime_after(const ktime_t cmp1, const ktime_t cmp2)
144{
145
146	return (ktime_compare(cmp1, cmp2) > 0);
147}
148
149static inline ktime_t
150timespec_to_ktime(struct timespec ts)
151{
152	return (ktime_set(ts.tv_sec, ts.tv_nsec));
153}
154
155static inline ktime_t
156timeval_to_ktime(struct timeval tv)
157{
158	return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
159}
160
161#define	ktime_to_timespec(kt)		ns_to_timespec(kt)
162#define	ktime_to_timespec64(kt)		ns_to_timespec(kt)
163#define	ktime_to_timeval(kt)		ns_to_timeval(kt)
164#define	ktime_to_ns(kt)			(kt)
165
166static inline int64_t
167ktime_get_ns(void)
168{
169	struct timespec ts;
170
171	ktime_get_ts(&ts);
172
173	return (ktime_to_ns(timespec_to_ktime(ts)));
174}
175
176static inline ktime_t
177ktime_get(void)
178{
179	struct timespec ts;
180
181	ktime_get_ts(&ts);
182	return (timespec_to_ktime(ts));
183}
184
185static inline ktime_t
186ktime_get_boottime(void)
187{
188	struct timespec ts;
189
190	nanouptime(&ts);
191	return (timespec_to_ktime(ts));
192}
193
194static inline ktime_t
195ktime_get_real(void)
196{
197	struct timespec ts;
198
199	nanotime(&ts);
200	return (timespec_to_ktime(ts));
201}
202
203static inline ktime_t
204ktime_get_real_seconds(void)
205{
206	struct timespec ts;
207
208	nanotime(&ts);
209	return (ts.tv_sec);
210}
211
212static inline ktime_t
213ktime_get_raw(void)
214{
215	struct timespec ts;
216
217	nanotime(&ts);
218	return (timespec_to_ktime(ts));
219}
220
221static inline u64
222ktime_get_raw_ns(void)
223{
224	struct timespec ts;
225
226	nanouptime(&ts);
227	return (ktime_to_ns(timespec_to_ktime(ts)));
228}
229
230#endif /* _LINUX_KTIME_H */
231