/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2020-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#ifndef _PRIORITY_CONTROL_MANAGER_H_
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#define _PRIORITY_CONTROL_MANAGER_H_
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#include <linux/mm.h>
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#include <linux/of.h>
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#include <linux/version.h>
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struct priority_control_manager_device;
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/**
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* struct priority_control_manager_ops - Callbacks for priority control manager operations
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*
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* @pcm_scheduler_priority_check: Callback to check if scheduling priority level can be requested
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*/
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struct priority_control_manager_ops {
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/*
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* pcm_scheduler_priority_check: This function can be used to check what priority its work
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* would be treated as based on the requested_priority value.
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*
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* @pcm_dev: The priority control manager through which the request is
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* being made.
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* @task: The task struct of the process requesting the priority check.
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* @requested_priority: The priority level being requested.
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*
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* The returned value will be:
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* The same as requested_priority if the process has permission to use requested_priority
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* A lower priority value if the process does not have permission to use requested_priority
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*
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* requested_priority has the following value range:
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* 0-3 : Priority level, 0 being highest and 3 being lowest
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*
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* Return: The priority that would actually be given, could be lower than requested_priority
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*/
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int (*pcm_scheduler_priority_check)(
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struct priority_control_manager_device *pcm_dev,
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struct task_struct *task, int requested_priority);
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};
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/**
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* struct priority_control_manager_device - Device structure for priority
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* control manager
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*
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* @ops: Callbacks associated with this device
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* @data: Pointer to device private data
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* @owner: Pointer to the module owner
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*
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* This structure should be registered with the platform device using
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* platform_set_drvdata().
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*/
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struct priority_control_manager_device {
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struct priority_control_manager_ops ops;
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void *data;
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struct module *owner;
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};
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#endif /* _PRIORITY_CONTROL_MANAGER_H_ */
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