rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __WATCHDOG_PRETIMEOUT_H |
| 3 | #define __WATCHDOG_PRETIMEOUT_H |
| 4 | |
| 5 | #define WATCHDOG_GOV_NAME_MAXLEN 20 |
| 6 | |
| 7 | struct watchdog_device; |
| 8 | |
| 9 | struct watchdog_governor { |
| 10 | const char name[WATCHDOG_GOV_NAME_MAXLEN]; |
| 11 | void (*pretimeout)(struct watchdog_device *wdd); |
| 12 | }; |
| 13 | |
| 14 | #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV) |
| 15 | /* Interfaces to watchdog pretimeout governors */ |
| 16 | int watchdog_register_governor(struct watchdog_governor *gov); |
| 17 | void watchdog_unregister_governor(struct watchdog_governor *gov); |
| 18 | |
| 19 | /* Interfaces to watchdog_dev.c */ |
| 20 | int watchdog_register_pretimeout(struct watchdog_device *wdd); |
| 21 | void watchdog_unregister_pretimeout(struct watchdog_device *wdd); |
| 22 | int watchdog_pretimeout_available_governors_get(char *buf); |
| 23 | int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf); |
| 24 | int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, |
| 25 | const char *buf); |
| 26 | |
| 27 | #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP) |
| 28 | #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop" |
| 29 | #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC) |
| 30 | #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic" |
| 31 | #endif |
| 32 | |
| 33 | #else |
| 34 | static inline int watchdog_register_pretimeout(struct watchdog_device *wdd) |
| 35 | { |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd) |
| 40 | { |
| 41 | } |
| 42 | |
| 43 | static inline int watchdog_pretimeout_available_governors_get(char *buf) |
| 44 | { |
| 45 | return -EINVAL; |
| 46 | } |
| 47 | |
| 48 | static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, |
| 49 | char *buf) |
| 50 | { |
| 51 | return -EINVAL; |
| 52 | } |
| 53 | |
| 54 | static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, |
| 55 | const char *buf) |
| 56 | { |
| 57 | return -EINVAL; |
| 58 | } |
| 59 | #endif |
| 60 | |
| 61 | #endif |