watchdog_hrtimer_pretimeout.c

 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
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
22void watchdog_hrtimer_pretimeout_init(struct watchdog_device *wdd)
23{
24	struct watchdog_core_data *wd_data = wdd->wd_data;
25
26	hrtimer_setup(&wd_data->pretimeout_timer, watchdog_hrtimer_pretimeout, CLOCK_MONOTONIC,
27		      HRTIMER_MODE_REL);
28}
29
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
41void watchdog_hrtimer_pretimeout_stop(struct watchdog_device *wdd)
42{
43	hrtimer_cancel(&wdd->wd_data->pretimeout_timer);
44}