1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (c) Copyright 2021 Hewlett Packard Enterprise Development LP. 4 */ 5 6 #include <linux/hrtimer.h> 7 #include <linux/watchdog.h> 8 9 #include "watchdog_core.h" 10 #include "watchdog_pretimeout.h" 11 watchdog_hrtimer_pretimeout(struct hrtimer * timer)12static enum hrtimer_restart watchdog_hrtimer_pretimeout(struct hrtimer *timer) 13 { 14 struct watchdog_core_data *wd_data; 15 16 wd_data = container_of(timer, struct watchdog_core_data, pretimeout_timer); 17 18 watchdog_notify_pretimeout(wd_data->wdd); 19 return HRTIMER_NORESTART; 20 } 21 watchdog_hrtimer_pretimeout_init(struct watchdog_device * wdd)22void watchdog_hrtimer_pretimeout_init(struct watchdog_device *wdd) 23 { 24 struct watchdog_core_data *wd_data = wdd->wd_data; 25 26 hrtimer_init(&wd_data->pretimeout_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 27 wd_data->pretimeout_timer.function = watchdog_hrtimer_pretimeout; 28 } 29 watchdog_hrtimer_pretimeout_start(struct watchdog_device * wdd)30void watchdog_hrtimer_pretimeout_start(struct watchdog_device *wdd) 31 { 32 if (!(wdd->info->options & WDIOF_PRETIMEOUT) && 33 !watchdog_pretimeout_invalid(wdd, wdd->pretimeout)) 34 hrtimer_start(&wdd->wd_data->pretimeout_timer, 35 ktime_set(wdd->timeout - wdd->pretimeout, 0), 36 HRTIMER_MODE_REL); 37 else 38 hrtimer_cancel(&wdd->wd_data->pretimeout_timer); 39 } 40 watchdog_hrtimer_pretimeout_stop(struct watchdog_device * wdd)41void watchdog_hrtimer_pretimeout_stop(struct watchdog_device *wdd) 42 { 43 hrtimer_cancel(&wdd->wd_data->pretimeout_timer); 44 } 45