base/wd/wd.c File Reference

#include <linux/module.h>
#include <linux/init.h>
#include <linux/version.h>
#include <asm/io.h>
#include <asm/rtai.h>
#include <rtai_sched.h>
#include <rtai_wd.h>

Include dependency graph for wd.c:

Go to the source code of this file.

Defines
#define	DBUG(x...)
#define	MY_ALLOC
#define	BAD_TASK_MAX   100
Functions
	MODULE_PARM (TickPeriod,"i")
	MODULE_PARM (wd_OneShot,"i")
	MODULE_PARM (Grace,"i")
	MODULE_PARM (Safety,"i")
	MODULE_PARM (Policy,"i")
	MODULE_PARM (Stretch,"i")
	MODULE_PARM (Slip,"i")
	MODULE_PARM (Limit,"i")
int	rt_wdset_grace (int new)
int	rt_wdset_gracediv (int new)
int	rt_wdset_safety (int new)
wd_policy	rt_wdset_policy (wd_policy new)
int	rt_wdset_slip (int new)
int	rt_wdset_stretch (int new)
int	rt_wdset_limit (int new)
BAD_RT_TASK *	new_bad_task (void)
void	free_bad_task (BAD_RT_TASK *bt)
void	append_bad_task (BAD_RT_TASK **list, BAD_RT_TASK *new)
BAD_RT_TASK *	delete_bad_task (BAD_RT_TASK **list, BAD_RT_TASK *del)
BAD_RT_TASK *	find_bad_task (BAD_RT_TASK *list, RT_TASK *t)
int	which_cpu (RT_TASK *t)
void	smpproof_task_suspend (RT_TASK *t)
void	smpproof_task_delete (RT_TASK *t)
void	stretch_badtask (RT_TASK *t, BAD_RT_TASK *bt, int cpuid)
void	start_slipping_badtask (RT_TASK *t, BAD_RT_TASK *bt, int cpuid)
void	check_slipping_badtask (BAD_RT_TASK *bt)
void	handle_badtask (int wd, RT_TASK *t, BAD_RT_TASK *bt, RTIME overrun)
void	watchdog (long wd)
void	dummy (long wd)
int	__rtai_wd_init (void)
void	__rtai_wd_exit (void)
	module_init (__rtai_wd_init)
	module_exit (__rtai_wd_exit)
	EXPORT_SYMBOL (rt_wdset_grace)
	EXPORT_SYMBOL (rt_wdset_safety)
	EXPORT_SYMBOL (rt_wdset_policy)
	EXPORT_SYMBOL (rt_wdset_slip)
	EXPORT_SYMBOL (rt_wdset_stretch)
	EXPORT_SYMBOL (rt_wdset_limit)
Variables
spinlock_t	alloc_lock = SPIN_LOCK_UNLOCKED
BAD_RT_TASK	bad_task_pool [BAD_TASK_MAX]
char	version [] = "$Revision: 1.5 $"
char	ver [10]
char *	policy_name []
int	num_wdogs
RT_TASK	wdog [NR_RT_CPUS]
RT_TASK *	tlists [NR_RT_CPUS]
RT_TASK **	smp_current
BAD_RT_TASK *	bad_tl [NR_RT_CPUS]
int	sched
int	TickPeriod = 10000000
int	wd_OneShot = 1
int	Grace = 3
int	GraceDiv = 1
int	Safety = 100
wd_policy	Policy = WD_SUSPEND
int	Stretch = 10
int	Slip = 10
int	Limit = 100

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Define Documentation

#define BAD_TASK_MAX   100

Definition at line 133 of file wd.c. Referenced by __rtai_wd_init(), and new_bad_task().

#define DBUG (  x...   )

Definition at line 120 of file wd.c. Referenced by check_slipping_badtask(), smpproof_task_delete(), smpproof_task_suspend(), start_slipping_badtask(), stretch_badtask(), and watchdog().

#define MY_ALLOC

Definition at line 124 of file wd.c.

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Function Documentation

void __rtai_wd_exit (  void   )

Definition at line 780 of file wd.c. References BAD_RT_TASK, bad_tl, delete_bad_task(), NR_RT_CPUS, num_wdogs, rt_busy_sleep(), rt_deregister_watchdog(), rt_task_delete(), rtai_proc_root, stop_rt_timer(), TickPeriod, WDLOG, and wdog. Here is the call graph for this function:

int __rtai_wd_init (  void   )

Definition at line 665 of file wd.c. References BAD_TASK_MAX, dummy(), Grace, GraceDiv, imuldiv(), Limit, nano2count(), nano2count_cpuid(), NR_RT_CPUS, NSECS_PER_SEC, num_wdogs, Policy, policy_name, rt_deregister_watchdog(), rt_get_base_linux_task(), rt_get_time_cpuid(), rt_printk(), rt_register_watchdog(), RT_SCHED_HIGHEST_PRIORITY, RT_SCHED_MUP, RT_SCHED_SMP, rt_sched_type(), RT_SCHED_UP, rt_set_oneshot_mode(), rt_set_periodic_mode(), RT_TASK, rt_task_init_cpuid(), rt_task_make_periodic(), rtai_proc_root, RTIME, Safety, sched, Slip, smp_current, start_rt_apic_timers(), start_rt_timer(), Stretch, TickPeriod, tlists, ver, version, watchdog(), WD_DEBUG, wd_OneShot, WD_STRETCH, WDLOG, and wdog. Here is the call graph for this function:

void append_bad_task (  BAD_RT_TASK **  list, BAD_RT_TASK *  new )  [static]

Definition at line 282 of file wd.c. References BAD_RT_TASK, and bad_rt_task::next. Referenced by handle_badtask().

void check_slipping_badtask (  BAD_RT_TASK *  bt  )  [static]

Definition at line 387 of file wd.c. References BAD_RT_TASK, bad_rt_task::count, bad_rt_task::countdown, DBUG, rt_task_resume(), bad_rt_task::slipping, and bad_rt_task::task. Referenced by watchdog(). Here is the call graph for this function:

BAD_RT_TASK* delete_bad_task (  BAD_RT_TASK **  list, BAD_RT_TASK *  del )  [static]

Definition at line 294 of file wd.c. References BAD_RT_TASK, free_bad_task(), and bad_rt_task::next. Referenced by __rtai_wd_exit(), and watchdog(). Here is the call graph for this function:

void dummy (  long  wd  )  [static]

Definition at line 560 of file wd.c. References rt_task_suspend(), and wdog. Referenced by __rtai_wd_init(). Here is the call graph for this function:

EXPORT_SYMBOL (  rt_wdset_limit   )

EXPORT_SYMBOL (  rt_wdset_stretch   )

EXPORT_SYMBOL (  rt_wdset_slip   )

EXPORT_SYMBOL (  rt_wdset_policy   )

EXPORT_SYMBOL (  rt_wdset_safety   )

EXPORT_SYMBOL (  rt_wdset_grace   )

BAD_RT_TASK* find_bad_task (  BAD_RT_TASK *  list, RT_TASK *  t )  [static]

Definition at line 308 of file wd.c. References BAD_RT_TASK, bad_rt_task::next, RT_TASK, and bad_rt_task::task. Referenced by watchdog().

void free_bad_task (  BAD_RT_TASK *  bt  )  [static]

Definition at line 272 of file wd.c. References BAD_RT_TASK, bad_rt_task::in_use, and rt_free(). Referenced by delete_bad_task(). Here is the call graph for this function:

void handle_badtask (  int  wd, RT_TASK *  t, BAD_RT_TASK *  bt, RTIME  overrun )  [static]

Definition at line 398 of file wd.c. References append_bad_task(), BAD_RT_TASK, bad_tl, bad_rt_task::count, bad_rt_task::countdown, bad_rt_task::forced, Limit, new_bad_task(), bad_rt_task::next, bad_rt_task::orig_period, Policy, bad_rt_task::policy, RT_TASK, RTIME, Safety, bad_rt_task::slipping, smpproof_task_delete(), smpproof_task_suspend(), start_slipping_badtask(), stretch_badtask(), bad_rt_task::task, bad_rt_task::valid, WD_DEBUG, WD_KILL, WD_NOTHING, WD_RESYNC, WD_SLIP, WD_STRETCH, WD_SUSPEND, and WDLOG. Referenced by watchdog(). Here is the call graph for this function:

module_exit (  __rtai_wd_exit   )

module_init (  __rtai_wd_init   )

MODULE_PARM (  Limit  , "i"  )

MODULE_PARM (  Slip  , "i"  )

MODULE_PARM (  Stretch  , "i"  )

MODULE_PARM (  Policy  , "i"  )

MODULE_PARM (  Safety  , "i"  )

MODULE_PARM (  Grace  , "i"  )

MODULE_PARM (  wd_OneShot  , "i"  )

MODULE_PARM (  TickPeriod  , "i"  )

BAD_RT_TASK* new_bad_task (  void   )  [static]

Definition at line 252 of file wd.c. References alloc_lock, BAD_RT_TASK, BAD_TASK_MAX, bad_task_pool, bad_rt_task::in_use, and rt_malloc(). Referenced by handle_badtask(). Here is the call graph for this function:

int rt_wdset_grace (  int  new  )

Definition at line 185 of file wd.c. References Grace, Policy, and WD_STRETCH.

int rt_wdset_gracediv (  int  new  )

Definition at line 195 of file wd.c. References GraceDiv, Policy, and WD_STRETCH.

int rt_wdset_limit (  int  new  )

Definition at line 243 of file wd.c. References Limit.

wd_policy rt_wdset_policy (  wd_policy  new  )

Definition at line 214 of file wd.c. References Grace, GraceDiv, Limit, Policy, Safety, WD_DEBUG, WD_KILL, wd_policy, and WD_STRETCH.

int rt_wdset_safety (  int  new  )

Definition at line 205 of file wd.c. References Grace, and Safety.

int rt_wdset_slip (  int  new  )

Definition at line 225 of file wd.c. References Slip.

int rt_wdset_stretch (  int  new  )

Definition at line 234 of file wd.c. References Stretch.

void smpproof_task_delete (  RT_TASK *  t  )  [static]

Definition at line 352 of file wd.c. References cpuid, DBUG, num_wdogs, RT_TASK, rt_task_delete(), rt_task_resume(), wdog, and which_cpu(). Referenced by handle_badtask(). Here is the call graph for this function:

void smpproof_task_suspend (  RT_TASK *  t  )  [static]

Definition at line 341 of file wd.c. References cpuid, DBUG, num_wdogs, RT_TASK, rt_task_resume(), rt_task_suspend(), wdog, and which_cpu(). Referenced by handle_badtask(), and start_slipping_badtask(). Here is the call graph for this function:

void start_slipping_badtask (  RT_TASK *  t, BAD_RT_TASK *  bt, int  cpuid )  [static]

Definition at line 373 of file wd.c. References BAD_RT_TASK, bad_rt_task::count, count2nano_cpuid(), bad_rt_task::countdown, cpuid, DBUG, llimd(), RT_TASK, Slip, bad_rt_task::slipping, smpproof_task_suspend(), and TickPeriod. Referenced by handle_badtask(). Here is the call graph for this function:

void stretch_badtask (  RT_TASK *  t, BAD_RT_TASK *  bt, int  cpuid )  [static]

Definition at line 364 of file wd.c. References BAD_RT_TASK, count2nano_cpuid(), cpuid, DBUG, llimd(), bad_rt_task::orig_period, RT_TASK, and Stretch. Referenced by handle_badtask(). Here is the call graph for this function:

void watchdog (  long  wd  )  [static]

Definition at line 474 of file wd.c. References BAD_RT_TASK, bad_tl, check_slipping_badtask(), DBUG, delete_bad_task(), find_bad_task(), Grace, GraceDiv, handle_badtask(), llimd(), bad_rt_task::next, num_wdogs, rt_get_time_cpuid(), RT_SCHED_DELAYED, RT_SCHED_RECEIVE, RT_SCHED_RETURN, RT_SCHED_RPC, RT_SCHED_SEMAPHORE, RT_SCHED_SEND, RT_SCHED_SUSPENDED, RT_TASK, rt_task_wait_period(), rt_whoami(), RTIME, bad_rt_task::slipping, task, tlists, bad_rt_task::valid, WDLOG, and wdog. Referenced by __rtai_wd_init(). Here is the call graph for this function:

int which_cpu (  RT_TASK *  t  )  [static]

Definition at line 320 of file wd.c. References cpuid, NR_RT_CPUS, RT_SCHED_MUP, RT_SCHED_SMP, RT_SCHED_UP, RT_TASK, sched, and smp_current. Referenced by smpproof_task_delete(), and smpproof_task_suspend().

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Variable Documentation

spinlock_t alloc_lock = SPIN_LOCK_UNLOCKED [static]

Definition at line 135 of file wd.c. Referenced by new_bad_task().

BAD_RT_TASK bad_task_pool[BAD_TASK_MAX] [static]

Definition at line 136 of file wd.c. Referenced by new_bad_task().

BAD_RT_TASK* bad_tl[NR_RT_CPUS] [static]

Definition at line 152 of file wd.c. Referenced by __rtai_wd_exit(), handle_badtask(), and watchdog().

int Grace = 3 [static]

Definition at line 163 of file wd.c. Referenced by __rtai_wd_init(), rt_wdset_grace(), rt_wdset_policy(), rt_wdset_safety(), and watchdog().

int GraceDiv = 1 [static]

Definition at line 166 of file wd.c. Referenced by __rtai_wd_init(), rt_wdset_gracediv(), rt_wdset_policy(), and watchdog().

int Limit = 100 [static]

Definition at line 181 of file wd.c. Referenced by __rtai_wd_init(), handle_badtask(), rt_wdset_limit(), and rt_wdset_policy().

int num_wdogs [static]

Definition at line 148 of file wd.c. Referenced by __rtai_wd_exit(), __rtai_wd_init(), smpproof_task_delete(), smpproof_task_suspend(), and watchdog().

wd_policy Policy = WD_SUSPEND [static]

Definition at line 172 of file wd.c. Referenced by __rtai_wd_init(), handle_badtask(), rt_wdset_grace(), rt_wdset_gracediv(), and rt_wdset_policy().

char* policy_name[] [static]

Initial value: {"Nothing", "Resync", "Debug", "Stretch", "Slip", "Suspend", "Kill"} Definition at line 144 of file wd.c. Referenced by __rtai_wd_init().

int Safety = 100 [static]

Definition at line 169 of file wd.c. Referenced by __rtai_wd_init(), handle_badtask(), rt_wdset_policy(), and rt_wdset_safety().

int sched [static]

Definition at line 153 of file wd.c. Referenced by __rtai_wd_init(), and which_cpu().

int Slip = 10 [static]

Definition at line 178 of file wd.c. Referenced by __rtai_wd_init(), rt_wdset_slip(), and start_slipping_badtask().

RT_TASK** smp_current [static]

Definition at line 151 of file wd.c. Referenced by __rtai_wd_init(), and which_cpu().

int Stretch = 10 [static]

Definition at line 175 of file wd.c. Referenced by __rtai_wd_init(), rt_wdset_stretch(), and stretch_badtask().

int TickPeriod = 10000000 [static]

Definition at line 157 of file wd.c. Referenced by __rtai_wd_exit(), __rtai_wd_init(), and start_slipping_badtask().

RT_TASK* tlists[NR_RT_CPUS] [static]

Definition at line 150 of file wd.c. Referenced by __rtai_wd_init(), and watchdog().

char ver[10] [static]

Definition at line 141 of file wd.c. Referenced by __rtai_wd_init().

char version[] = "$Revision: 1.5 $" [static]

Definition at line 140 of file wd.c. Referenced by __rtai_wd_init().

int wd_OneShot = 1 [static]

Definition at line 160 of file wd.c. Referenced by __rtai_wd_init().

RT_TASK wdog[NR_RT_CPUS] [static]

Definition at line 149 of file wd.c. Referenced by __rtai_wd_exit(), __rtai_wd_init(), dummy(), smpproof_task_delete(), smpproof_task_suspend(), and watchdog().

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