/*-
* 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);
/*
* The following function pointer is used to attach a software watchdog
* if no hardware watchdog has been attached, and if the software module
* has initialized the function pointer.
*/
extern void (*wdog_software_attach)(void);
#endif
#endif /* _SYS_WATCHDOG_H */