| 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 | |
| 12 | static 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(wdd: wd_data->wdd); |
| 19 | return HRTIMER_NORESTART; |
| 20 | } |
| 21 | |
| 22 | void watchdog_hrtimer_pretimeout_init(struct watchdog_device *wdd) |
| 23 | { |
| 24 | struct watchdog_core_data *wd_data = wdd->wd_data; |
| 25 | |
| 26 | hrtimer_init(timer: &wd_data->pretimeout_timer, CLOCK_MONOTONIC, mode: HRTIMER_MODE_REL); |
| 27 | wd_data->pretimeout_timer.function = watchdog_hrtimer_pretimeout; |
| 28 | } |
| 29 | |
| 30 | void watchdog_hrtimer_pretimeout_start(struct watchdog_device *wdd) |
| 31 | { |
| 32 | if (!(wdd->info->options & WDIOF_PRETIMEOUT) && |
| 33 | !watchdog_pretimeout_invalid(wdd, t: wdd->pretimeout)) |
| 34 | hrtimer_start(timer: &wdd->wd_data->pretimeout_timer, |
| 35 | tim: ktime_set(secs: wdd->timeout - wdd->pretimeout, nsecs: 0), |
| 36 | mode: HRTIMER_MODE_REL); |
| 37 | else |
| 38 | hrtimer_cancel(timer: &wdd->wd_data->pretimeout_timer); |
| 39 | } |
| 40 | |
| 41 | void watchdog_hrtimer_pretimeout_stop(struct watchdog_device *wdd) |
| 42 | { |
| 43 | hrtimer_cancel(timer: &wdd->wd_data->pretimeout_timer); |
| 44 | } |
| 45 |