diff options
Diffstat (limited to 'drivers/watchdog/watchdog_core.h')
| -rw-r--r-- | drivers/watchdog/watchdog_core.h | 60 |
1 files changed, 55 insertions, 5 deletions
diff --git a/drivers/watchdog/watchdog_core.h b/drivers/watchdog/watchdog_core.h index 86ff962d1e15..ab825d9f9248 100644 --- a/drivers/watchdog/watchdog_core.h +++ b/drivers/watchdog/watchdog_core.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * watchdog_core.h * @@ -6,6 +7,8 @@ * * (c) Copyright 2008-2011 Wim Van Sebroeck <wim@iguana.be>. * + * (c) Copyright 2021 Hewlett Packard Enterprise Development LP. + * * This source code is part of the generic code that can be used * by all the watchdog timer drivers. * @@ -16,22 +19,69 @@ * Satyam Sharma <satyam@infradead.org> * Randy Dunlap <randy.dunlap@oracle.com> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw. * admit liability nor provide warranty for any of this software. * This material is provided "AS-IS" and at no charge. */ +#include <linux/cdev.h> +#include <linux/device.h> +#include <linux/hrtimer_types.h> +#include <linux/init.h> +#include <linux/kthread.h> +#include <linux/mutex_types.h> +#include <linux/types.h> +#include <linux/watchdog.h> + #define MAX_DOGS 32 /* Maximum number of watchdog devices */ /* + * struct watchdog_core_data - watchdog core internal data + * @dev: The watchdog's internal device + * @cdev: The watchdog's Character device. + * @wdd: Pointer to watchdog device. + * @lock: Lock for watchdog core. + * @status: Watchdog core internal status bits. + */ +struct watchdog_core_data { + struct device dev; + struct cdev cdev; + struct watchdog_device *wdd; + struct mutex lock; + ktime_t last_keepalive; + ktime_t last_hw_keepalive; + ktime_t open_deadline; + struct hrtimer timer; + struct kthread_work work; +#if IS_ENABLED(CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT) + struct hrtimer pretimeout_timer; +#endif + unsigned long status; /* Internal status bits */ +#define _WDOG_DEV_OPEN 0 /* Opened ? */ +#define _WDOG_ALLOW_RELEASE 1 /* Did we receive the magic char ? */ +#define _WDOG_KEEPALIVE 2 /* Did we receive a keepalive ? */ +}; + +/* * Functions/procedures to be called by the core */ extern int watchdog_dev_register(struct watchdog_device *); extern void watchdog_dev_unregister(struct watchdog_device *); extern int __init watchdog_dev_init(void); extern void __exit watchdog_dev_exit(void); + +static inline bool watchdog_have_pretimeout(struct watchdog_device *wdd) +{ + return wdd->info->options & WDIOF_PRETIMEOUT || + IS_ENABLED(CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT); +} + +#if IS_ENABLED(CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT) +void watchdog_hrtimer_pretimeout_init(struct watchdog_device *wdd); +void watchdog_hrtimer_pretimeout_start(struct watchdog_device *wdd); +void watchdog_hrtimer_pretimeout_stop(struct watchdog_device *wdd); +#else +static inline void watchdog_hrtimer_pretimeout_init(struct watchdog_device *wdd) {} +static inline void watchdog_hrtimer_pretimeout_start(struct watchdog_device *wdd) {} +static inline void watchdog_hrtimer_pretimeout_stop(struct watchdog_device *wdd) {} +#endif |