/*-
- * Copyright (c) 2014 Mellanox Technologies, Ltd.
+ * Copyright (c) 2014-2015 Mellanox Technologies, Ltd.
+ * Copyright (c) 2015 François Tigeot
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifndef _LINUX_KTIME_H
#define _LINUX_KTIME_H
-#include <sys/time.h>
#include <linux/types.h>
+#include <linux/time.h>
#include <linux/jiffies.h>
+#define ktime_get_ts(x) getnanouptime(x)
-/* Get the monotonic time in timespec format: */
-#define ktime_get_ts getnanouptime
-
-#define NSEC_PER_USEC 1000L
-#define NSEC_PER_SEC 1000000000L
-
-/*
- * ktime_t:
- *
- * On 64-bit CPUs a single 64-bit variable is used to store the hrtimers
- * internal representation of time values in scalar nanoseconds. The
- * design plays out best on 64-bit CPUs, where most conversions are
- * NOPs and most arithmetic ktime_t operations are plain arithmetic
- * operations.
- *
- * On 32-bit CPUs an optimized representation of the timespec structure
- * is used to avoid expensive conversions from and to timespecs. The
- * endian-aware order of the tv struct members is chosen to allow
- * mathematical operations on the tv64 member of the union too, which
- * for certain operations produces better code.
- *
- * For architectures with efficient support for 64/32-bit conversions the
- * plain scalar nanosecond based representation can be selected by the
- * config switch CONFIG_KTIME_SCALAR.
- */
+/* time values in nanoseconds */
union ktime {
- s64 tv64;
-#if BITS_PER_LONG != 64 && !defined(CONFIG_KTIME_SCALAR)
- struct {
-# ifdef __BIG_ENDIAN
- s32 sec, nsec;
-# else
- s32 nsec, sec;
-# endif
- } tv;
-#endif
+ int64_t tv64;
};
-typedef union ktime ktime_t; /* Kill this */
+typedef union ktime ktime_t;
#define KTIME_MAX ((s64)~((u64)1 << 63))
#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
-/*
- * ktime_t definitions when using the 64-bit scalar representation:
- */
-
-#if (BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)
-
-/**
- * ktime_set - Set a ktime_t variable from a seconds/nanoseconds value
- * @secs: seconds to set
- * @nsecs: nanoseconds to set
- *
- * Return the ktime_t representation of the value
- */
-static inline ktime_t ktime_set(const long secs, const unsigned long nsecs)
+static inline int64_t
+ktime_to_ns(ktime_t kt)
{
-#if (BITS_PER_LONG == 64)
- if (unlikely(secs >= KTIME_SEC_MAX))
- return (ktime_t){ .tv64 = KTIME_MAX };
-#endif
- return (ktime_t) { .tv64 = (s64)secs * NSEC_PER_SEC + (s64)nsecs };
+ return kt.tv64;
}
-/* Subtract two ktime_t variables. rem = lhs -rhs: */
-#define ktime_sub(lhs, rhs) \
- ({ (ktime_t){ .tv64 = (lhs).tv64 - (rhs).tv64 }; })
-
-/* Add two ktime_t variables. res = lhs + rhs: */
-#define ktime_add(lhs, rhs) \
- ({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; })
-
-/*
- * Add a ktime_t variable and a scalar nanosecond value.
- * res = kt + nsval:
- */
-#define ktime_add_ns(kt, nsval) \
- ({ (ktime_t){ .tv64 = (kt).tv64 + (nsval) }; })
-
-/*
- * Subtract a scalar nanosecod from a ktime_t variable
- * res = kt - nsval:
- */
-#define ktime_sub_ns(kt, nsval) \
- ({ (ktime_t){ .tv64 = (kt).tv64 - (nsval) }; })
-
-/* convert a timespec to ktime_t format: */
-static inline ktime_t timespec_to_ktime(struct timespec ts)
-{
- return ktime_set(ts.tv_sec, ts.tv_nsec);
-}
-
-/* convert a timeval to ktime_t format: */
-static inline ktime_t timeval_to_ktime(struct timeval tv)
-{
- return ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC);
-}
-
-/* Map the ktime_t to timespec conversion to ns_to_timespec function */
-#define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
-
-/* Map the ktime_t to timeval conversion to ns_to_timeval function */
-#define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
-
-/* Convert ktime_t to nanoseconds - NOP in the scalar storage format: */
-#define ktime_to_ns(kt) ((kt).tv64)
-
-#else /* !((BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)) */
-
-/*
- * Helper macros/inlines to get the ktime_t math right in the timespec
- * representation. The macros are sometimes ugly - their actual use is
- * pretty okay-ish, given the circumstances. We do all this for
- * performance reasons. The pure scalar nsec_t based code was nice and
- * simple, but created too many 64-bit / 32-bit conversions and divisions.
- *
- * Be especially aware that negative values are represented in a way
- * that the tv.sec field is negative and the tv.nsec field is greater
- * or equal to zero but less than nanoseconds per second. This is the
- * same representation which is used by timespecs.
- *
- * tv.sec < 0 and 0 >= tv.nsec < NSEC_PER_SEC
- */
-
-/* Set a ktime_t variable to a value in sec/nsec representation: */
-static inline ktime_t ktime_set(const long secs, const unsigned long nsecs)
+static inline struct timeval
+ktime_to_timeval(ktime_t kt)
{
- return (ktime_t) { .tv = { .sec = secs, .nsec = nsecs } };
+ return ns_to_timeval(kt.tv64);
}
-/**
- * ktime_sub - subtract two ktime_t variables
- * @lhs: minuend
- * @rhs: subtrahend
- *
- * Returns the remainder of the subtraction
- */
-static inline ktime_t ktime_sub(const ktime_t lhs, const ktime_t rhs)
+static inline ktime_t
+ktime_add_ns(ktime_t kt, int64_t ns)
{
ktime_t res;
- res.tv64 = lhs.tv64 - rhs.tv64;
- if (res.tv.nsec < 0)
- res.tv.nsec += NSEC_PER_SEC;
-
- return res;
+ res.tv64 = kt.tv64 + ns;
+ return kt;
}
-/**
- * ktime_add - add two ktime_t variables
- * @add1: addend1
- * @add2: addend2
- *
- * Returns the sum of @add1 and @add2.
- */
-static inline ktime_t ktime_add(const ktime_t add1, const ktime_t add2)
+static inline ktime_t
+ktime_sub_ns(ktime_t kt, int64_t ns)
{
ktime_t res;
- res.tv64 = add1.tv64 + add2.tv64;
- /*
- * performance trick: the (u32) -NSEC gives 0x00000000Fxxxxxxx
- * so we subtract NSEC_PER_SEC and add 1 to the upper 32 bit.
- *
- * it's equivalent to:
- * tv.nsec -= NSEC_PER_SEC
- * tv.sec ++;
- */
- if (res.tv.nsec >= NSEC_PER_SEC)
- res.tv64 += (u32)-NSEC_PER_SEC;
-
- return res;
+ res.tv64 = kt.tv64 - ns;
+ return kt;
}
-/**
- * ktime_add_ns - Add a scalar nanoseconds value to a ktime_t variable
- * @kt: addend
- * @nsec: the scalar nsec value to add
- *
- * Returns the sum of @kt and @nsec in ktime_t format
- */
-extern ktime_t ktime_add_ns(const ktime_t kt, u64 nsec);
-
-/**
- * ktime_sub_ns - Subtract a scalar nanoseconds value from a ktime_t variable
- * @kt: minuend
- * @nsec: the scalar nsec value to subtract
- *
- * Returns the subtraction of @nsec from @kt in ktime_t format
- */
-extern ktime_t ktime_sub_ns(const ktime_t kt, u64 nsec);
-
-/**
- * timespec_to_ktime - convert a timespec to ktime_t format
- * @ts: the timespec variable to convert
- *
- * Returns a ktime_t variable with the converted timespec value
- */
-static inline ktime_t timespec_to_ktime(const struct timespec ts)
+static inline ktime_t
+ktime_set(const long secs, const unsigned long nsecs)
{
- return (ktime_t) { .tv = { .sec = (s32)ts.tv_sec,
- .nsec = (s32)ts.tv_nsec } };
+ ktime_t retval = { (s64)secs * NSEC_PER_SEC + (s64)nsecs };
+ return (retval);
}
-/**
- * timeval_to_ktime - convert a timeval to ktime_t format
- * @tv: the timeval variable to convert
- *
- * Returns a ktime_t variable with the converted timeval value
- */
-static inline ktime_t timeval_to_ktime(const struct timeval tv)
+static inline ktime_t
+ktime_sub(ktime_t lhs, ktime_t rhs)
{
- return (ktime_t) { .tv = { .sec = (s32)tv.tv_sec,
- .nsec = (s32)(tv.tv_usec *
- NSEC_PER_USEC) } };
+ lhs.tv64 -= rhs.tv64;
+ return (lhs);
}
-/**
- * ktime_to_timespec - convert a ktime_t variable to timespec format
- * @kt: the ktime_t variable to convert
- *
- * Returns the timespec representation of the ktime value
- */
-static inline struct timespec ktime_to_timespec(const ktime_t kt)
+static inline ktime_t
+ktime_add(ktime_t lhs, ktime_t rhs)
{
- return (struct timespec) { .tv_sec = (time_t) kt.tv.sec,
- .tv_nsec = (long) kt.tv.nsec };
+ lhs.tv64 += rhs.tv64;
+ return (lhs);
}
-/**
- * ktime_to_timeval - convert a ktime_t variable to timeval format
- * @kt: the ktime_t variable to convert
- *
- * Returns the timeval representation of the ktime value
- */
-static inline struct timeval ktime_to_timeval(const ktime_t kt)
+static inline ktime_t
+timespec_to_ktime(struct timespec ts)
{
- return (struct timeval) {
- .tv_sec = (time_t) kt.tv.sec,
- .tv_usec = (suseconds_t) (kt.tv.nsec / NSEC_PER_USEC) };
+ return (ktime_set(ts.tv_sec, ts.tv_nsec));
}
-/**
- * ktime_to_ns - convert a ktime_t variable to scalar nanoseconds
- * @kt: the ktime_t variable to convert
- *
- * Returns the scalar nanoseconds representation of @kt
- */
-static inline s64 ktime_to_ns(const ktime_t kt)
+static inline ktime_t
+timeval_to_ktime(struct timeval tv)
{
- return (s64) kt.tv.sec * NSEC_PER_SEC + kt.tv.nsec;
+ return (ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC));
}
-#endif /* !((BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)) */
+#define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
+#define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
+#define ktime_to_ns(kt) ((kt).tv64)
-static inline s64 ktime_get_ns(void)
+static inline s64
+ktime_get_ns(void)
{
struct timespec ts;
ktime_t kt;
+
ktime_get_ts(&ts);
kt = timespec_to_ktime(ts);
return (ktime_to_ns(kt));
}
+static inline ktime_t
+ktime_get(void)
+{
+ struct timespec ts;
+
+ ktime_get_ts(&ts);
+ return (timespec_to_ktime(ts));
+}
+
#endif /* _LINUX_KTIME_H */
--- /dev/null
+/* $FreeBSD$ */
+/*
+ * Copyright (c) 2014-2015 François Tigeot
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice unmodified, this list of conditions, and the following
+ * disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LINUX_TIME_H_
+#define _LINUX_TIME_H_
+
+#define NSEC_PER_USEC 1000L
+#define NSEC_PER_SEC 1000000000L
+
+#include <sys/time.h>
+#include <sys/stdint.h>
+
+static inline struct timeval
+ns_to_timeval(const int64_t nsec)
+{
+ struct timeval tv;
+ long rem;
+
+ if (nsec == 0) {
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ return (tv);
+ }
+
+ tv.tv_sec = nsec / NSEC_PER_SEC;
+ rem = nsec % NSEC_PER_SEC;
+ if (rem < 0) {
+ tv.tv_sec--;
+ rem += NSEC_PER_SEC;
+ }
+ tv.tv_usec = rem / 1000;
+ return (tv);
+}
+
+static inline int64_t
+timeval_to_ns(const struct timeval *tv)
+{
+ return ((int64_t)tv->tv_sec * NSEC_PER_SEC) +
+ tv->tv_usec * NSEC_PER_USEC;
+}
+
+#define getrawmonotonic(ts) nanouptime(ts)
+
+static inline struct timespec
+timespec_sub(struct timespec lhs, struct timespec rhs)
+{
+ struct timespec ts;
+
+ ts.tv_sec = lhs.tv_sec;
+ ts.tv_nsec = lhs.tv_nsec;
+ timespecsub(&ts, &rhs);
+
+ return ts;
+}
+
+static inline void
+set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
+{
+ /* XXX: this doesn't actually normalize anything */
+ ts->tv_sec = sec;
+ ts->tv_nsec = nsec;
+}
+
+static inline int64_t
+timespec_to_ns(const struct timespec *ts)
+{
+ return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
+}
+
+static inline struct timespec
+ns_to_timespec(const int64_t nsec)
+{
+ struct timespec ts;
+ int32_t rem;
+
+ if (nsec == 0) {
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ return (ts);
+ }
+
+ ts.tv_sec = nsec / NSEC_PER_SEC;
+ rem = nsec % NSEC_PER_SEC;
+ if (rem < 0) {
+ ts.tv_sec--;
+ rem += NSEC_PER_SEC;
+ }
+ ts.tv_nsec = rem;
+ return (ts);
+}
+
+static inline int
+timespec_valid(const struct timespec *ts)
+{
+ if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
+ ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
+ return (0);
+ return (1);
+}
+
+static inline unsigned long
+get_seconds(void)
+{
+ return time_uptime;
+}
+
+#endif /* _LINUX_TIME_H_ */
projects / people / julieng / freebsd.git / commitdiff