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// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2021-2022 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
#include "mali_kbase.h"
#include "hwcnt/mali_kbase_hwcnt_watchdog_if.h"
#include "hwcnt/mali_kbase_hwcnt_watchdog_if_timer.h"
#include <linux/workqueue.h>
#include <linux/slab.h>
/**
* struct kbase_hwcnt_watchdog_if_timer_info - Timer information for watchdog
* interface.
*
* @workq: Single threaded work queue in which to execute callbacks.
* @dwork: Worker to execute callback function.
* @timer_enabled: True if watchdog timer enabled, otherwise false
* @callback: Watchdog callback function
* @user_data: Pointer to user data passed as argument to the callback
* function
*/
struct kbase_hwcnt_watchdog_if_timer_info {
struct workqueue_struct *workq;
struct delayed_work dwork;
bool timer_enabled;
kbase_hwcnt_watchdog_callback_fn *callback;
void *user_data;
};
/**
* kbasep_hwcnt_watchdog_callback() - Watchdog callback
*
* @work: Work structure
*
* Function to be called in a work queue after watchdog timer has expired.
*/
static void kbasep_hwcnt_watchdog_callback(struct work_struct *const work)
{
struct kbase_hwcnt_watchdog_if_timer_info *const info =
container_of(work, struct kbase_hwcnt_watchdog_if_timer_info, dwork.work);
if (info->callback)
info->callback(info->user_data);
}
static int kbasep_hwcnt_watchdog_if_timer_enable(
const struct kbase_hwcnt_watchdog_info *const timer, u32 const period_ms,
kbase_hwcnt_watchdog_callback_fn *const callback, void *const user_data)
{
struct kbase_hwcnt_watchdog_if_timer_info *const timer_info = (void *)timer;
if (WARN_ON(!timer) || WARN_ON(!callback) || WARN_ON(timer_info->timer_enabled))
return -EINVAL;
timer_info->callback = callback;
timer_info->user_data = user_data;
queue_delayed_work(timer_info->workq, &timer_info->dwork, msecs_to_jiffies(period_ms));
timer_info->timer_enabled = true;
return 0;
}
static void
kbasep_hwcnt_watchdog_if_timer_disable(const struct kbase_hwcnt_watchdog_info *const timer)
{
struct kbase_hwcnt_watchdog_if_timer_info *const timer_info = (void *)timer;
if (WARN_ON(!timer))
return;
if (!timer_info->timer_enabled)
return;
cancel_delayed_work_sync(&timer_info->dwork);
timer_info->timer_enabled = false;
}
static void
kbasep_hwcnt_watchdog_if_timer_modify(const struct kbase_hwcnt_watchdog_info *const timer,
u32 const delay_ms)
{
struct kbase_hwcnt_watchdog_if_timer_info *const timer_info = (void *)timer;
if (WARN_ON(!timer) || WARN_ON(!timer_info->timer_enabled))
return;
mod_delayed_work(timer_info->workq, &timer_info->dwork, msecs_to_jiffies(delay_ms));
}
void kbase_hwcnt_watchdog_if_timer_destroy(struct kbase_hwcnt_watchdog_interface *const watchdog_if)
{
struct kbase_hwcnt_watchdog_if_timer_info *timer_info;
if (WARN_ON(!watchdog_if))
return;
timer_info = (void *)watchdog_if->timer;
if (WARN_ON(!timer_info))
return;
destroy_workqueue(timer_info->workq);
kfree(timer_info);
*watchdog_if = (struct kbase_hwcnt_watchdog_interface){
.timer = NULL, .enable = NULL, .disable = NULL, .modify = NULL
};
}
int kbase_hwcnt_watchdog_if_timer_create(struct kbase_hwcnt_watchdog_interface *const watchdog_if)
{
struct kbase_hwcnt_watchdog_if_timer_info *timer_info;
if (WARN_ON(!watchdog_if))
return -EINVAL;
timer_info = kmalloc(sizeof(*timer_info), GFP_KERNEL);
if (!timer_info)
return -ENOMEM;
*timer_info = (struct kbase_hwcnt_watchdog_if_timer_info){ .timer_enabled = false };
INIT_DELAYED_WORK(&timer_info->dwork, kbasep_hwcnt_watchdog_callback);
*watchdog_if = (struct kbase_hwcnt_watchdog_interface){
.timer = (void *)timer_info,
.enable = kbasep_hwcnt_watchdog_if_timer_enable,
.disable = kbasep_hwcnt_watchdog_if_timer_disable,
.modify = kbasep_hwcnt_watchdog_if_timer_modify,
};
timer_info->workq = alloc_workqueue("mali_hwc_watchdog_wq", WQ_HIGHPRI | WQ_UNBOUND, 1);
if (timer_info->workq)
return 0;
kfree(timer_info);
return -ENOMEM;
}
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