/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
* 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.
*
* $FreeBSD$
*/
#ifndef _LINUX_JIFFIES_H_
#define _LINUX_JIFFIES_H_
#include <linux/types.h>
#include <linux/time.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#define jiffies ticks
#define jiffies_64 ticks
#define jiffies_to_msecs(x) (((int64_t)(int)(x)) * 1000 / hz)
#define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1)
#define time_after(a, b) ((int)((b) - (a)) < 0)
#define time_after32(a, b) ((int32_t)((uint32_t)(b) - (uint32_t)(a)) < 0)
#define time_before(a, b) time_after(b,a)
#define time_before32(a, b) time_after32(b, a)
#define time_after_eq(a, b) ((int)((a) - (b)) >= 0)
#define time_before_eq(a, b) time_after_eq(b, a)
#define time_in_range(a,b,c) \
(time_after_eq(a,b) && time_before_eq(a,c))
#define time_is_after_eq_jiffies(a) time_after_eq(a, jiffies)
#define time_is_after_jiffies(a) time_after(a, jiffies)
#define HZ hz
extern uint64_t lkpi_nsec2hz_rem;
extern uint64_t lkpi_nsec2hz_div;
extern uint64_t lkpi_nsec2hz_max;
extern uint64_t lkpi_usec2hz_rem;
extern uint64_t lkpi_usec2hz_div;
extern uint64_t lkpi_usec2hz_max;
extern uint64_t lkpi_msec2hz_rem;
extern uint64_t lkpi_msec2hz_div;
extern uint64_t lkpi_msec2hz_max;
static inline int
timespec_to_jiffies(const struct timespec *ts)
{
u64 result;
result = ((u64)hz * ts->tv_sec) +
(((u64)hz * ts->tv_nsec + NSEC_PER_SEC - 1) / NSEC_PER_SEC);
if (result > MAX_JIFFY_OFFSET)
result = MAX_JIFFY_OFFSET;
return ((int)result);
}
static inline int
msecs_to_jiffies(uint64_t msec)
{
uint64_t result;
if (msec > lkpi_msec2hz_max)
msec = lkpi_msec2hz_max;
result = howmany(msec * lkpi_msec2hz_rem, lkpi_msec2hz_div);
if (result > MAX_JIFFY_OFFSET)
result = MAX_JIFFY_OFFSET;
return ((int)result);
}
static inline int
usecs_to_jiffies(uint64_t usec)
{
uint64_t result;
if (usec > lkpi_usec2hz_max)
usec = lkpi_usec2hz_max;
result = howmany(usec * lkpi_usec2hz_rem, lkpi_usec2hz_div);
if (result > MAX_JIFFY_OFFSET)
result = MAX_JIFFY_OFFSET;
return ((int)result);
}
static inline uint64_t
nsecs_to_jiffies64(uint64_t nsec)
{
if (nsec > lkpi_nsec2hz_max)
nsec = lkpi_nsec2hz_max;
return (howmany(nsec * lkpi_nsec2hz_rem, lkpi_nsec2hz_div));
}
static inline unsigned long
nsecs_to_jiffies(uint64_t nsec)
{
if (sizeof(unsigned long) >= sizeof(uint64_t)) {
if (nsec > lkpi_nsec2hz_max)
nsec = lkpi_nsec2hz_max;
} else {
if (nsec > (lkpi_nsec2hz_max >> 32))
nsec = (lkpi_nsec2hz_max >> 32);
}
return (howmany(nsec * lkpi_nsec2hz_rem, lkpi_nsec2hz_div));
}
static inline uint64_t
jiffies_to_nsecs(int j)
{
return ((1000000000ULL / hz) * (uint64_t)(unsigned int)j);
}
static inline uint64_t
jiffies_to_usecs(int j)
{
return ((1000000ULL / hz) * (uint64_t)(unsigned int)j);
}
static inline uint64_t
get_jiffies_64(void)
{
return ((uint64_t)(unsigned int)ticks);
}
static inline int
linux_timer_jiffies_until(int expires)
{
int delta = expires - jiffies;
/* guard against already expired values */
if (delta < 1)
delta = 1;
return (delta);
}
#endif /* _LINUX_JIFFIES_H_ */
