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Diffstat (limited to 'freebsd/sys/sys/watchdog.h')
| -rw-r--r-- | freebsd/sys/sys/watchdog.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/freebsd/sys/sys/watchdog.h b/freebsd/sys/sys/watchdog.h new file mode 100644 index 00000000..92c47dee --- /dev/null +++ b/freebsd/sys/sys/watchdog.h @@ -0,0 +1,115 @@ +/*- + * Copyright (c) 2003 Poul-Henning Kamp + * Copyright (c) 2013 iXsystems.com, + * author: Alfred Perlstein <alfred@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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 _SYS_WATCHDOG_H +#define _SYS_WATCHDOG_H + +#include <sys/ioccom.h> + +#define _PATH_WATCHDOG "fido" + +#define WDIOCPATPAT _IOW('W', 42, u_int) /* pat the watchdog */ +#define WDIOC_SETTIMEOUT _IOW('W', 43, int) /* set/reset the timer */ +#define WDIOC_GETTIMEOUT _IOR('W', 44, int) /* get total timeout */ +#define WDIOC_GETTIMELEFT _IOR('W', 45, int) /* get time left */ +#define WDIOC_GETPRETIMEOUT _IOR('W', 46, int) /* get the pre-timeout */ +#define WDIOC_SETPRETIMEOUT _IOW('W', 47, int) /* set the pre-timeout */ +/* set the action when a pre-timeout occurs see: WD_SOFT_* */ +#define WDIOC_SETPRETIMEOUTACT _IOW('W', 48, int) + +/* use software watchdog instead of hardware */ +#define WDIOC_SETSOFT _IOW('W', 49, int) +#define WDIOC_SETSOFTTIMEOUTACT _IOW('W', 50, int) + +#define WD_ACTIVE 0x8000000 + /* + * Watchdog reset, timeout set to value in WD_INTERVAL field. + * The kernel will arm the watchdog and unless the userland + * program calls WDIOCPATPAT again before the timer expires + * the system will reinitialize. + */ + +#define WD_PASSIVE 0x0400000 + /* + * Set the watchdog in passive mode. + * The kernel will chose an appropriate timeout duration and + * periodically reset the timer provided everything looks all + * right to the kernel. + */ + +#define WD_LASTVAL 0x0200000 + /* + * Use the already last used timeout value. + * The kernel will use as timeout the last valid timeout provided. + */ + +#define WD_INTERVAL 0x00000ff + /* + * Mask for duration bits. + * The watchdog will have a nominal patience of 2^N * nanoseconds. + * Example: N == 30 gives a patience of 2^30 nanoseconds ~= 1 second. + * NB: Expect variance in the +/- 10-20% range. + */ + +/* Handy macros for humans not used to power of two nanoseconds */ +#define WD_TO_NEVER 0 +#define WD_TO_1MS 20 +#define WD_TO_125MS 27 +#define WD_TO_250MS 28 +#define WD_TO_500MS 29 +#define WD_TO_1SEC 30 +#define WD_TO_2SEC 31 +#define WD_TO_4SEC 32 +#define WD_TO_8SEC 33 +#define WD_TO_16SEC 34 +#define WD_TO_32SEC 35 +#define WD_TO_64SEC 36 +#define WD_TO_128SEC 37 + +/* action on pre-timeout trigger */ +#define WD_SOFT_PANIC 0x01 /* panic */ +#define WD_SOFT_DDB 0x02 /* enter debugger */ +#define WD_SOFT_LOG 0x04 /* log(9) */ +#define WD_SOFT_PRINTF 0x08 /* printf(9) */ +#define WD_SOFT_MASK 0x0f /* all of the above */ + +#ifdef _KERNEL + +#include <sys/eventhandler.h> + +typedef void (*watchdog_fn)(void *, u_int, int *); + +EVENTHANDLER_DECLARE(watchdog_list, watchdog_fn); + +u_int wdog_kern_last_timeout(void); +int wdog_kern_pat(u_int utim); +#endif + +#endif /* _SYS_WATCHDOG_H */ |