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21#ifndef _LINUX_KTIME_H
22#define _LINUX_KTIME_H
23
24#include <linux/time.h>
25#include <linux/jiffies.h>
26#include <asm/bug.h>
27
28
29typedef s64 ktime_t;
30
31
32
33
34
35
36
37
38static inline ktime_t ktime_set(const s64 secs, const unsigned long nsecs)
39{
40 if (unlikely(secs >= KTIME_SEC_MAX))
41 return KTIME_MAX;
42
43 return secs * NSEC_PER_SEC + (s64)nsecs;
44}
45
46
47#define ktime_sub(lhs, rhs) ((lhs) - (rhs))
48
49
50#define ktime_add(lhs, rhs) ((lhs) + (rhs))
51
52
53
54
55
56#define ktime_add_unsafe(lhs, rhs) ((u64) (lhs) + (rhs))
57
58
59
60
61
62#define ktime_add_ns(kt, nsval) ((kt) + (nsval))
63
64
65
66
67
68#define ktime_sub_ns(kt, nsval) ((kt) - (nsval))
69
70
71static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
72{
73 return ktime_set(ts.tv_sec, ts.tv_nsec);
74}
75
76
77#define ktime_to_timespec64(kt) ns_to_timespec64((kt))
78
79
80static inline s64 ktime_to_ns(const ktime_t kt)
81{
82 return kt;
83}
84
85
86
87
88
89
90
91
92
93
94
95static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2)
96{
97 if (cmp1 < cmp2)
98 return -1;
99 if (cmp1 > cmp2)
100 return 1;
101 return 0;
102}
103
104
105
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107
108
109
110
111static inline bool ktime_after(const ktime_t cmp1, const ktime_t cmp2)
112{
113 return ktime_compare(cmp1, cmp2) > 0;
114}
115
116
117
118
119
120
121
122
123static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2)
124{
125 return ktime_compare(cmp1, cmp2) < 0;
126}
127
128#if BITS_PER_LONG < 64
129extern s64 __ktime_divns(const ktime_t kt, s64 div);
130static inline s64 ktime_divns(const ktime_t kt, s64 div)
131{
132
133
134
135
136 BUG_ON(div < 0);
137 if (__builtin_constant_p(div) && !(div >> 32)) {
138 s64 ns = kt;
139 u64 tmp = ns < 0 ? -ns : ns;
140
141 do_div(tmp, div);
142 return ns < 0 ? -tmp : tmp;
143 } else {
144 return __ktime_divns(kt, div);
145 }
146}
147#else
148static inline s64 ktime_divns(const ktime_t kt, s64 div)
149{
150
151
152
153
154 WARN_ON(div < 0);
155 return kt / div;
156}
157#endif
158
159static inline s64 ktime_to_us(const ktime_t kt)
160{
161 return ktime_divns(kt, NSEC_PER_USEC);
162}
163
164static inline s64 ktime_to_ms(const ktime_t kt)
165{
166 return ktime_divns(kt, NSEC_PER_MSEC);
167}
168
169static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
170{
171 return ktime_to_us(ktime_sub(later, earlier));
172}
173
174static inline s64 ktime_ms_delta(const ktime_t later, const ktime_t earlier)
175{
176 return ktime_to_ms(ktime_sub(later, earlier));
177}
178
179static inline ktime_t ktime_add_us(const ktime_t kt, const u64 usec)
180{
181 return ktime_add_ns(kt, usec * NSEC_PER_USEC);
182}
183
184static inline ktime_t ktime_add_ms(const ktime_t kt, const u64 msec)
185{
186 return ktime_add_ns(kt, msec * NSEC_PER_MSEC);
187}
188
189static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec)
190{
191 return ktime_sub_ns(kt, usec * NSEC_PER_USEC);
192}
193
194static inline ktime_t ktime_sub_ms(const ktime_t kt, const u64 msec)
195{
196 return ktime_sub_ns(kt, msec * NSEC_PER_MSEC);
197}
198
199extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
200
201
202
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204
205
206
207
208
209static inline __must_check bool ktime_to_timespec64_cond(const ktime_t kt,
210 struct timespec64 *ts)
211{
212 if (kt) {
213 *ts = ktime_to_timespec64(kt);
214 return true;
215 } else {
216 return false;
217 }
218}
219
220#include <vdso/ktime.h>
221
222static inline ktime_t ns_to_ktime(u64 ns)
223{
224 return ns;
225}
226
227static inline ktime_t ms_to_ktime(u64 ms)
228{
229 return ms * NSEC_PER_MSEC;
230}
231
232# include <linux/timekeeping.h>
233# include <linux/timekeeping32.h>
234
235#endif
236