Differential D13713 Diff 37434 head/sys/dev/watchdog/watchdog.c

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head/sys/dev/watchdog/watchdog.c

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SYSCTL_UINT(_hw_watchdog, OID_AUTO, wd_last_u, CTLFLAG_RD,		SYSCTL_UINT(_hw_watchdog, OID_AUTO, wd_last_u, CTLFLAG_RD,
&wd_last_u_sysctl, 0, "Watchdog last update time");		&wd_last_u_sysctl, 0, "Watchdog last update time");
SYSCTL_UINT(_hw_watchdog, OID_AUTO, wd_last_u_secs, CTLFLAG_RD,		SYSCTL_UINT(_hw_watchdog, OID_AUTO, wd_last_u_secs, CTLFLAG_RD,
&wd_last_u_sysctl_secs, 0, "Watchdog last update time");		&wd_last_u_sysctl_secs, 0, "Watchdog last update time");

static int wd_lastpat_valid = 0;		static int wd_lastpat_valid = 0;
static time_t wd_lastpat = 0; /* when the watchdog was last patted */		static time_t wd_lastpat = 0; /* when the watchdog was last patted */

		/* Hook for external software watchdog to register for use if needed */
		void (*wdog_software_attach)(void);

static void		static void
pow2ns_to_ts(int pow2ns, struct timespec *ts)		pow2ns_to_ts(int pow2ns, struct timespec *ts)
{		{
uint64_t ns;		uint64_t ns;

ns = 1ULL << pow2ns;		ns = 1ULL << pow2ns;
ts->tv_sec = ns / 1000000000ULL;		ts->tv_sec = ns / 1000000000ULL;
ts->tv_nsec = ns % 1000000000ULL;		ts->tv_nsec = ns % 1000000000ULL;
Show All 26 Lines	seconds_to_pow2ns(int seconds)
return (power);		return (power);
}		}


int		int
wdog_kern_pat(u_int utim)		wdog_kern_pat(u_int utim)
{		{
int error;		int error;
		static int first = 1;

if ((utim & WD_LASTVAL) != 0 && (utim & WD_INTERVAL) > 0)		if ((utim & WD_LASTVAL) != 0 && (utim & WD_INTERVAL) > 0)
return (EINVAL);		return (EINVAL);

if ((utim & WD_LASTVAL) != 0) {		if ((utim & WD_LASTVAL) != 0) {
/*		/*
* if WD_LASTVAL is set, fill in the bits for timeout		* if WD_LASTVAL is set, fill in the bits for timeout
* from the saved value in wd_last_u.		* from the saved value in wd_last_u.
Show All 25 Lines	if (wd_softtimer) {
} else {		} else {
(void) callout_reset(&wd_softtimeo_handle,		(void) callout_reset(&wd_softtimeo_handle,
pow2ns_to_ticks(utim), wd_timeout_cb, "soft");		pow2ns_to_ticks(utim), wd_timeout_cb, "soft");
}		}
error = 0;		error = 0;
} else {		} else {
EVENTHANDLER_INVOKE(watchdog_list, utim, &error);		EVENTHANDLER_INVOKE(watchdog_list, utim, &error);
}		}
		/*
		* If we no hardware watchdog responded, we have not tried to
		* attach an external software watchdog, and one is available,
		* attach it now and retry.
		*/
		if (error == EOPNOTSUPP && first && *wdog_software_attach != NULL) {
		(*wdog_software_attach)();
		EVENTHANDLER_INVOKE(watchdog_list, utim, &error);
		}
		first = 0;

wd_set_pretimeout(wd_pretimeout, true);		wd_set_pretimeout(wd_pretimeout, true);
/*		/*
* If we were able to arm/strobe the watchdog, then		* If we were able to arm/strobe the watchdog, then
* update the last time it was strobed for WDIOC_GETTIMELEFT		* update the last time it was strobed for WDIOC_GETTIMELEFT
*/		*/
if (!error) {		if (!error) {
struct timespec ts;		struct timespec ts;

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