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
29#ifndef _LINUXKPI_LINUX_KTIME_H
30#define	_LINUXKPI_LINUX_KTIME_H
31
32#include <linux/types.h>
33#include <linux/time.h>
34#include <linux/jiffies.h>
35
36/* time values in nanoseconds */
37typedef s64 ktime_t;
38
39#define	KTIME_MAX			((s64)~((u64)1 << 63))
40#define	KTIME_SEC_MAX			(KTIME_MAX / NSEC_PER_SEC)
41
42static inline int64_t
43ktime_to_ns(ktime_t kt)
44{
45	return (kt);
46}
47
48static inline ktime_t
49ns_to_ktime(uint64_t nsec)
50{
51	return (nsec);
52}
53
54static inline int64_t
55ktime_divns(const ktime_t kt, int64_t div)
56{
57	return (kt / 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 ktime_t
73ms_to_ktime(uint64_t ms)
74{
75	return (ms * NSEC_PER_MSEC);
76}
77
78static inline struct timeval
79ktime_to_timeval(ktime_t kt)
80{
81	return (ns_to_timeval(kt));
82}
83
84static inline ktime_t
85ktime_add_ns(ktime_t kt, int64_t ns)
86{
87	return (kt + ns);
88}
89
90static inline ktime_t
91ktime_add_ms(ktime_t kt, int64_t ms)
92{
93
94	return (ktime_add_ns(kt, ms * NSEC_PER_MSEC));
95}
96
97static inline ktime_t
98ktime_add_us(ktime_t kt, int64_t us)
99{
100
101	return (ktime_add_ns(kt, us * NSEC_PER_USEC));
102}
103
104static inline ktime_t
105ktime_sub_ns(ktime_t kt, int64_t ns)
106{
107	return (kt - ns);
108}
109
110static inline ktime_t
111ktime_set(const long secs, const unsigned long nsecs)
112{
113	ktime_t retval = {(s64) secs * NSEC_PER_SEC + (s64) nsecs};
114
115	return (retval);
116}
117
118static inline ktime_t
119ktime_sub(ktime_t lhs, ktime_t rhs)
120{
121	return (lhs - rhs);
122}
123
124static inline int64_t
125ktime_us_delta(ktime_t later, ktime_t earlier)
126{
127	ktime_t diff = ktime_sub(later, earlier);
128
129	return (ktime_to_us(diff));
130}
131
132static inline int64_t
133ktime_ms_delta(ktime_t later, ktime_t earlier)
134{
135	ktime_t diff = ktime_sub(later, earlier);
136
137	return (ktime_to_ms(diff));
138}
139
140static inline ktime_t
141ktime_add(ktime_t lhs, ktime_t rhs)
142{
143	return (lhs + rhs);
144}
145
146static inline int
147ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
148{
149
150	if (cmp1 > cmp2)
151		return (1);
152	else if (cmp1 < cmp2)
153		return (-1);
154	else
155		return (0);
156}
157
158static inline bool
159ktime_after(const ktime_t cmp1, const ktime_t cmp2)
160{
161
162	return (ktime_compare(cmp1, cmp2) > 0);
163}
164
165static inline bool
166ktime_before(const ktime_t cmp1, const ktime_t cmp2)
167{
168
169	return (ktime_compare(cmp1, cmp2) < 0);
170}
171
172static inline ktime_t
173timespec_to_ktime(struct timespec ts)
174{
175	return (ktime_set(ts.tv_sec, ts.tv_nsec));
176}
177
178static inline ktime_t
179timeval_to_ktime(struct timeval tv)
180{
181	return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
182}
183
184static inline int64_t
185timespec64_to_ns(struct timespec64 *ts)
186{
187	return (timespec_to_ns(ts));
188}
189
190#define	ktime_to_timespec(kt)		ns_to_timespec(kt)
191#define	ktime_to_timespec64(kt)		ns_to_timespec(kt)
192#define	ktime_to_timeval(kt)		ns_to_timeval(kt)
193#define	ktime_to_ns(kt)			(kt)
194#define	ktime_get_ts(ts)		getnanouptime(ts)
195#define	ktime_get_ts64(ts)		getnanouptime(ts)
196#define	ktime_get_raw_ts64(ts)		getnanouptime(ts)
197#define	ktime_get_real_ts64(ts)		getnanotime(ts)
198#define	getrawmonotonic64(ts)		getnanouptime(ts)
199
200static inline int64_t
201ktime_get_ns(void)
202{
203	struct timespec ts;
204
205	ktime_get_ts(&ts);
206
207	return (ktime_to_ns(timespec_to_ktime(ts)));
208}
209
210static inline ktime_t
211ktime_get(void)
212{
213	struct timespec ts;
214
215	ktime_get_ts(&ts);
216	return (timespec_to_ktime(ts));
217}
218
219static inline ktime_t
220ktime_get_boottime(void)
221{
222	struct timespec ts;
223
224	nanouptime(&ts);
225	return (timespec_to_ktime(ts));
226}
227
228static inline uint64_t
229ktime_get_boottime_ns(void)
230{
231
232	return (ktime_to_ns(ktime_get_boottime()));
233}
234
235static inline ktime_t
236ktime_get_real(void)
237{
238	struct timespec ts;
239
240	nanotime(&ts);
241	return (timespec_to_ktime(ts));
242}
243
244static inline ktime_t
245ktime_get_real_seconds(void)
246{
247	struct timespec ts;
248
249	nanotime(&ts);
250	return (ts.tv_sec);
251}
252
253static inline ktime_t
254ktime_get_raw(void)
255{
256	struct timespec ts;
257
258	nanouptime(&ts);
259	return (timespec_to_ktime(ts));
260}
261
262static inline u64
263ktime_get_raw_ns(void)
264{
265	struct timespec ts;
266
267	nanouptime(&ts);
268	return (ktime_to_ns(timespec_to_ktime(ts)));
269}
270
271static inline uint64_t
272ktime_get_raw_fast_ns(void)
273{
274	struct timespec ts;
275
276	getnanouptime(&ts);
277	return (ktime_to_ns(timespec_to_ktime(ts)));
278}
279
280#endif /* _LINUXKPI_LINUX_KTIME_H */
281