[mirror_ubuntu-artful-kernel.git] / drivers / watchdog / watchdog_pretimeout.h

#ifndef __WATCHDOG_PRETIMEOUT_H
#define __WATCHDOG_PRETIMEOUT_H

#define WATCHDOG_GOV_NAME_MAXLEN	20

struct watchdog_device;

struct watchdog_governor {
	const char	name[WATCHDOG_GOV_NAME_MAXLEN];
	void		(*pretimeout)(struct watchdog_device *wdd);
};

#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
/* Interfaces to watchdog pretimeout governors */
int watchdog_register_governor(struct watchdog_governor *gov);
void watchdog_unregister_governor(struct watchdog_governor *gov);

/* Interfaces to watchdog_dev.c */
int watchdog_register_pretimeout(struct watchdog_device *wdd);
void watchdog_unregister_pretimeout(struct watchdog_device *wdd);
int watchdog_pretimeout_available_governors_get(char *buf);
int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf);
int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
				     const char *buf);

#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"noop"
#elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"panic"
#endif

#else
static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
{
	return 0;
}

static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
{
}

static inline int watchdog_pretimeout_available_governors_get(char *buf)
{
	return -EINVAL;
}

static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
						   char *buf)
{
	return -EINVAL;
}

static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
						   const char *buf)
{
	return -EINVAL;
}
#endif

#endif
Commit	Line	Data
ff84136c VZ	1	#ifndef __WATCHDOG_PRETIMEOUT_H
	2	#define __WATCHDOG_PRETIMEOUT_H
	3
	4	#define WATCHDOG_GOV_NAME_MAXLEN 20
	5
	6	struct watchdog_device;
	7
	8	struct watchdog_governor {
	9	const char name[WATCHDOG_GOV_NAME_MAXLEN];
	10	void (pretimeout)(struct watchdog_device wdd);
	11	};
	12
	13	#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
	14	/* Interfaces to watchdog pretimeout governors */
	15	int watchdog_register_governor(struct watchdog_governor *gov);
	16	void watchdog_unregister_governor(struct watchdog_governor *gov);
	17
	18	/* Interfaces to watchdog_dev.c */
	19	int watchdog_register_pretimeout(struct watchdog_device *wdd);
	20	void watchdog_unregister_pretimeout(struct watchdog_device *wdd);
89873a71	21	int watchdog_pretimeout_available_governors_get(char *buf);
ff84136c	22	int watchdog_pretimeout_governor_get(struct watchdog_device wdd, char buf);
53f96cee VZ	23	int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
53f96cee VZ	24	const char *buf);
ff84136c	25
f77710c4 VZ	26	#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
f77710c4 VZ	27	#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop"
da0d12ff VZ	28	#elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
da0d12ff VZ	29	#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic"
f77710c4 VZ	30	#endif
f77710c4 VZ	31
ff84136c VZ	32	#else
	33	static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
	34	{
	35	return 0;
	36	}
	37
	38	static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
	39	{
	40	}
	41
89873a71 VZ	42	static inline int watchdog_pretimeout_available_governors_get(char *buf)
	43	{
	44	return -EINVAL;
	45	}
	46
ff84136c VZ	47	static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
	48	char *buf)
	49	{
	50	return -EINVAL;
	51	}
53f96cee VZ	52
	53	static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
	54	const char *buf)
	55	{
	56	return -EINVAL;
	57	}
ff84136c VZ	58	#endif
	59
	60	#endif