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/* SPDX-License-Identifier: GPL-2.0 */
/*
*
* (C) COPYRIGHT 2020-2021 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.
*
*/
#ifndef _PRIORITY_CONTROL_MANAGER_H_
#define _PRIORITY_CONTROL_MANAGER_H_
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/version.h>
struct priority_control_manager_device;
/**
* struct priority_control_manager_ops - Callbacks for priority control manager operations
*
* @pcm_scheduler_priority_check: Callback to check if scheduling priority level can be requested
*/
struct priority_control_manager_ops {
/**
* pcm_scheduler_priority_check: This function can be used to check what priority its work
* would be treated as based on the requested_priority value.
*
* @pcm_dev: The priority control manager through which the request is
* being made.
* @task: The task struct of the process requesting the priority check.
* @requested_priority: The priority level being requested.
*
* The returned value will be:
* The same as requested_priority if the process has permission to use requested_priority
* A lower priority value if the process does not have permission to use requested_priority
*
* requested_priority has the following value range:
* 0-3 : Priority level, 0 being highest and 3 being lowest
*
* Return: The priority that would actually be given, could be lower than requested_priority
*/
int (*pcm_scheduler_priority_check)(
struct priority_control_manager_device *pcm_dev,
struct task_struct *task, int requested_priority);
};
/**
* struct priority_control_manager_device - Device structure for priority
* control manager
*
* @ops: Callbacks associated with this device
* @data: Pointer to device private data
* @owner: Pointer to the module owner
*
* This structure should be registered with the platform device using
* platform_set_drvdata().
*/
struct priority_control_manager_device {
struct priority_control_manager_ops ops;
void *data;
struct module *owner;
};
#endif /* _PRIORITY_CONTROL_MANAGER_H_ */
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