Author: markj Date: Mon Jun 26 16:28:46 2017 New Revision: 320364 URL: https://svnweb.freebsd.org/changeset/base/320364
Log: Implement parts of the hrtimer API in the LinuxKPI. Reviewed by: hselasky MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D11359 Added: head/sys/compat/linuxkpi/common/include/linux/hrtimer.h (contents, props changed) head/sys/compat/linuxkpi/common/src/linux_hrtimer.c (contents, props changed) Modified: head/sys/conf/files head/sys/modules/linuxkpi/Makefile Added: head/sys/compat/linuxkpi/common/include/linux/hrtimer.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/compat/linuxkpi/common/include/linux/hrtimer.h Mon Jun 26 16:28:46 2017 (r320364) @@ -0,0 +1,79 @@ +/*- + * Copyright (c) 2017 Mark Johnston <ma...@freebsd.org> + * 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_HRTIMER_H_ +#define _LINUX_HRTIMER_H_ + +#include <sys/_callout.h> +#include <sys/_mutex.h> + +#include <linux/ktime.h> +#include <linux/timer.h> + +enum hrtimer_mode { + HRTIMER_MODE_REL, +}; + +enum hrtimer_restart { + HRTIMER_RESTART, + HRTIMER_NORESTART, +}; + +struct hrtimer { + enum hrtimer_restart (*function)(struct hrtimer *); + struct mtx mtx; + struct callout callout; + uint32_t flags; +}; + +#define hrtimer_active(hrtimer) linux_hrtimer_active(hrtimer) +#define hrtimer_cancel(hrtimer) linux_hrtimer_cancel(hrtimer) +#define hrtimer_init(hrtimer, clock, mode) do { \ + CTASSERT((clock) == CLOCK_MONOTONIC); \ + CTASSERT((mode) == HRTIMER_MODE_REL); \ + linux_hrtimer_init(hrtimer); \ +} while (0) +#define hrtimer_set_expires(hrtimer, time) \ + linux_hrtimer_set_expires(hrtimer, time) +#define hrtimer_start(hrtimer, time, mode) do { \ + CTASSERT((mode) == HRTIMER_MODE_REL); \ + linux_hrtimer_start(hrtimer, time); \ +} while (0) +#define hrtimer_start_range_ns(hrtimer, time, prec, mode) do { \ + CTASSERT((mode) == HRTIMER_MODE_REL); \ + linux_hrtimer_start_range_ns(hrtimer, time, prec); \ +} while (0) + +bool linux_hrtimer_active(struct hrtimer *); +int linux_hrtimer_cancel(struct hrtimer *); +void linux_hrtimer_init(struct hrtimer *); +void linux_hrtimer_set_expires(struct hrtimer *, ktime_t); +void linux_hrtimer_start(struct hrtimer *, ktime_t); +void linux_hrtimer_start_range_ns(struct hrtimer *, ktime_t, int64_t); + +#endif /* _LINUX_HRTIMER_H_ */ Added: head/sys/compat/linuxkpi/common/src/linux_hrtimer.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/compat/linuxkpi/common/src/linux_hrtimer.c Mon Jun 26 16:28:46 2017 (r320364) @@ -0,0 +1,108 @@ +/*- + * Copyright (c) 2017 Mark Johnston <ma...@freebsd.org> + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/time.h> + +#include <machine/cpu.h> + +#include <linux/hrtimer.h> + +/* hrtimer flags */ +#define HRTIMER_ACTIVE 0x01 + +static void +hrtimer_call_handler(void *arg) +{ + struct hrtimer *hrtimer; + enum hrtimer_restart ret; + + hrtimer = arg; + ret = hrtimer->function(hrtimer); + MPASS(ret == HRTIMER_NORESTART); + hrtimer->flags &= ~HRTIMER_ACTIVE; +} + +bool +linux_hrtimer_active(struct hrtimer *hrtimer) +{ + bool ret; + + mtx_lock(&hrtimer->mtx); + ret = (hrtimer->flags & HRTIMER_ACTIVE) != 0; + mtx_unlock(&hrtimer->mtx); + return (ret); +} + +int +linux_hrtimer_cancel(struct hrtimer *hrtimer) +{ + + if (!hrtimer_active(hrtimer)) + return (0); + (void)callout_drain(&hrtimer->callout); + return (1); +} + +void +linux_hrtimer_init(struct hrtimer *hrtimer) +{ + + hrtimer->function = NULL; + hrtimer->flags = 0; + mtx_init(&hrtimer->mtx, "hrtimer", NULL, MTX_DEF | MTX_RECURSE); + callout_init_mtx(&hrtimer->callout, &hrtimer->mtx, 0); +} + +void +linux_hrtimer_set_expires(struct hrtimer *hrtimer __unused, + ktime_t time __unused) +{ +} + +void +linux_hrtimer_start(struct hrtimer *hrtimer, ktime_t time) +{ + + linux_hrtimer_start_range_ns(hrtimer, time, 0); +} + +void +linux_hrtimer_start_range_ns(struct hrtimer *hrtimer, ktime_t time, int64_t nsec) +{ + + mtx_lock(&hrtimer->mtx); + callout_reset_sbt(&hrtimer->callout, time.tv64 * SBT_1NS, + nsec * SBT_1NS, hrtimer_call_handler, hrtimer, 0); + hrtimer->flags |= HRTIMER_ACTIVE; + mtx_unlock(&hrtimer->mtx); +} Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Mon Jun 26 16:08:28 2017 (r320363) +++ head/sys/conf/files Mon Jun 26 16:28:46 2017 (r320364) @@ -4269,6 +4269,8 @@ compat/linuxkpi/common/src/linux_compat.c optional com compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_current.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" +compat/linuxkpi/common/src/linux_hrtimer.c optional compat_linuxkpi \ + compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_kthread.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_lock.c optional compat_linuxkpi \ Modified: head/sys/modules/linuxkpi/Makefile ============================================================================== --- head/sys/modules/linuxkpi/Makefile Mon Jun 26 16:08:28 2017 (r320363) +++ head/sys/modules/linuxkpi/Makefile Mon Jun 26 16:28:46 2017 (r320364) @@ -5,6 +5,7 @@ KMOD= linuxkpi SRCS= linux_kmod.c \ linux_compat.c \ linux_current.c \ + linux_hrtimer.c \ linux_kthread.c \ linux_lock.c \ linux_page.c \ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
