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0a85496223
Submitted by: Johannes Lundberg <johalun0@gmail.com> MFC after: 1 week Sponsored by: Mellanox Technologies Sponsored by: Limelight Networks
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*-
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* Copyright (c) 2017 Mark Johnston <markj@FreeBSD.org>
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/time.h>
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#include <machine/cpu.h>
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#include <linux/hrtimer.h>
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static void
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hrtimer_call_handler(void *arg)
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{
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struct hrtimer *hrtimer;
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enum hrtimer_restart ret;
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hrtimer = arg;
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ret = hrtimer->function(hrtimer);
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if (ret == HRTIMER_RESTART) {
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callout_schedule_sbt(&hrtimer->callout,
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nstosbt(hrtimer->expires), nstosbt(hrtimer->precision), 0);
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} else {
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callout_deactivate(&hrtimer->callout);
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}
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}
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bool
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linux_hrtimer_active(struct hrtimer *hrtimer)
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{
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bool ret;
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mtx_lock(&hrtimer->mtx);
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ret = callout_active(&hrtimer->callout);
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mtx_unlock(&hrtimer->mtx);
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return (ret);
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}
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/*
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* Cancel active hrtimer.
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* Return 1 if timer was active and cancellation succeeded, or 0 otherwise.
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*/
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int
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linux_hrtimer_cancel(struct hrtimer *hrtimer)
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{
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return (callout_drain(&hrtimer->callout) > 0);
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}
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void
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linux_hrtimer_init(struct hrtimer *hrtimer)
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{
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memset(hrtimer, 0, sizeof(*hrtimer));
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mtx_init(&hrtimer->mtx, "hrtimer", NULL,
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MTX_DEF | MTX_RECURSE | MTX_NOWITNESS);
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callout_init_mtx(&hrtimer->callout, &hrtimer->mtx, 0);
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}
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void
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linux_hrtimer_set_expires(struct hrtimer *hrtimer, ktime_t time)
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{
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hrtimer->expires = ktime_to_ns(time);
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}
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void
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linux_hrtimer_start(struct hrtimer *hrtimer, ktime_t time)
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{
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linux_hrtimer_start_range_ns(hrtimer, time, 0);
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}
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void
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linux_hrtimer_start_range_ns(struct hrtimer *hrtimer, ktime_t time,
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int64_t nsec)
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{
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mtx_lock(&hrtimer->mtx);
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hrtimer->precision = nsec;
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callout_reset_sbt(&hrtimer->callout, nstosbt(ktime_to_ns(time)),
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nstosbt(nsec), hrtimer_call_handler, hrtimer, 0);
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mtx_unlock(&hrtimer->mtx);
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}
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void
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linux_hrtimer_forward_now(struct hrtimer *hrtimer, ktime_t interval)
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{
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mtx_lock(&hrtimer->mtx);
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callout_reset_sbt(&hrtimer->callout, nstosbt(ktime_to_ns(interval)),
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nstosbt(hrtimer->precision), hrtimer_call_handler, hrtimer, 0);
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mtx_unlock(&hrtimer->mtx);
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}
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