1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __WATCHDOG_PRETIMEOUT_H 3*4882a593Smuzhiyun #define __WATCHDOG_PRETIMEOUT_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #define WATCHDOG_GOV_NAME_MAXLEN 20 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun struct watchdog_device; 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun struct watchdog_governor { 10*4882a593Smuzhiyun const char name[WATCHDOG_GOV_NAME_MAXLEN]; 11*4882a593Smuzhiyun void (*pretimeout)(struct watchdog_device *wdd); 12*4882a593Smuzhiyun }; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV) 15*4882a593Smuzhiyun /* Interfaces to watchdog pretimeout governors */ 16*4882a593Smuzhiyun int watchdog_register_governor(struct watchdog_governor *gov); 17*4882a593Smuzhiyun void watchdog_unregister_governor(struct watchdog_governor *gov); 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun /* Interfaces to watchdog_dev.c */ 20*4882a593Smuzhiyun int watchdog_register_pretimeout(struct watchdog_device *wdd); 21*4882a593Smuzhiyun void watchdog_unregister_pretimeout(struct watchdog_device *wdd); 22*4882a593Smuzhiyun int watchdog_pretimeout_available_governors_get(char *buf); 23*4882a593Smuzhiyun int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf); 24*4882a593Smuzhiyun int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, 25*4882a593Smuzhiyun const char *buf); 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP) 28*4882a593Smuzhiyun #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop" 29*4882a593Smuzhiyun #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC) 30*4882a593Smuzhiyun #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic" 31*4882a593Smuzhiyun #endif 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #else watchdog_register_pretimeout(struct watchdog_device * wdd)34*4882a593Smuzhiyunstatic inline int watchdog_register_pretimeout(struct watchdog_device *wdd) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun return 0; 37*4882a593Smuzhiyun } 38*4882a593Smuzhiyun watchdog_unregister_pretimeout(struct watchdog_device * wdd)39*4882a593Smuzhiyunstatic inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd) 40*4882a593Smuzhiyun { 41*4882a593Smuzhiyun } 42*4882a593Smuzhiyun watchdog_pretimeout_available_governors_get(char * buf)43*4882a593Smuzhiyunstatic inline int watchdog_pretimeout_available_governors_get(char *buf) 44*4882a593Smuzhiyun { 45*4882a593Smuzhiyun return -EINVAL; 46*4882a593Smuzhiyun } 47*4882a593Smuzhiyun watchdog_pretimeout_governor_get(struct watchdog_device * wdd,char * buf)48*4882a593Smuzhiyunstatic inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, 49*4882a593Smuzhiyun char *buf) 50*4882a593Smuzhiyun { 51*4882a593Smuzhiyun return -EINVAL; 52*4882a593Smuzhiyun } 53*4882a593Smuzhiyun watchdog_pretimeout_governor_set(struct watchdog_device * wdd,const char * buf)54*4882a593Smuzhiyunstatic inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, 55*4882a593Smuzhiyun const char *buf) 56*4882a593Smuzhiyun { 57*4882a593Smuzhiyun return -EINVAL; 58*4882a593Smuzhiyun } 59*4882a593Smuzhiyun #endif 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun #endif 62