8363051739
Reviewed by: hselasky, markj MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D14807
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_JIFFIES_H_
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#define _LINUX_JIFFIES_H_
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#include <linux/types.h>
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#include <linux/time.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/limits.h>
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#define jiffies ticks
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#define jiffies_64 ticks
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#define jiffies_to_msecs(x) (((int64_t)(int)(x)) * 1000 / hz)
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#define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1)
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#define time_after(a, b) ((int)((b) - (a)) < 0)
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#define time_before(a, b) time_after(b,a)
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#define time_after_eq(a, b) ((int)((a) - (b)) >= 0)
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#define time_before_eq(a, b) time_after_eq(b, a)
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#define time_in_range(a,b,c) \
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(time_after_eq(a,b) && time_before_eq(a,c))
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#define time_is_after_eq_jiffies(a) time_after_eq(a, jiffies)
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#define HZ hz
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static inline int
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timespec_to_jiffies(const struct timespec *ts)
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{
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u64 result;
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result = ((u64)hz * ts->tv_sec) +
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(((u64)hz * ts->tv_nsec + NSEC_PER_SEC - 1) / NSEC_PER_SEC);
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if (result > MAX_JIFFY_OFFSET)
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result = MAX_JIFFY_OFFSET;
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return ((int)result);
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}
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static inline int
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msecs_to_jiffies(uint64_t msec)
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{
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uint64_t msec_max, result;
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msec_max = -1ULL / (uint64_t)hz;
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if (msec > msec_max)
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msec = msec_max;
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result = howmany(msec * (uint64_t)hz, 1000ULL);
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if (result > MAX_JIFFY_OFFSET)
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result = MAX_JIFFY_OFFSET;
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return ((int)result);
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}
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static inline int
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usecs_to_jiffies(uint64_t usec)
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{
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uint64_t usec_max, result;
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usec_max = -1ULL / (uint64_t)hz;
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if (usec > usec_max)
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usec = usec_max;
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result = howmany(usec * (uint64_t)hz, 1000000ULL);
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if (result > MAX_JIFFY_OFFSET)
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result = MAX_JIFFY_OFFSET;
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return ((int)result);
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}
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static inline uint64_t
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nsecs_to_jiffies64(uint64_t nsec)
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{
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uint64_t nsec_max, result;
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nsec_max = -1ULL / (uint64_t)hz;
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if (nsec > nsec_max)
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nsec = nsec_max;
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result = howmany(nsec * (uint64_t)hz, 1000000000ULL);
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if (result > MAX_JIFFY_OFFSET)
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result = MAX_JIFFY_OFFSET;
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return (result);
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}
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static inline uint64_t
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nsecs_to_jiffies(uint64_t n)
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{
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return (usecs_to_jiffies(howmany(n, 1000ULL)));
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}
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static inline uint64_t
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jiffies_to_nsecs(int j)
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{
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return ((1000000000ULL / hz) * (uint64_t)(unsigned int)j);
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}
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static inline uint64_t
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jiffies_to_usecs(int j)
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{
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return ((1000000ULL / hz) * (uint64_t)(unsigned int)j);
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}
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static inline uint64_t
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get_jiffies_64(void)
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{
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return ((uint64_t)(unsigned int)ticks);
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}
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static inline int
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linux_timer_jiffies_until(int expires)
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{
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int delta = expires - jiffies;
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/* guard against already expired values */
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if (delta < 1)
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delta = 1;
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return (delta);
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}
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#endif /* _LINUX_JIFFIES_H_ */
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