123 lines
5.3 KiB
C
123 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2020-2023 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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* DOC: PCM notifier callback types
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*
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* ADD_PRIORITIZED_PROCESS - indicate that work items for this process should be
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* given priority over the work items from other
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* processes that were assigned the same static
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* priority level. Processes that would benefit from
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* being added to this list includes foreground
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* applications, as well as any other latency-sensitive
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* applications.
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*
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* REMOVE_PRIORITIZED_PROCESS - indicate that work items for this process
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* should no longer be prioritized over other work
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* items given the same static priority level.
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*/
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#define ADD_PRIORITIZED_PROCESS 0
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#define REMOVE_PRIORITIZED_PROCESS 1
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/**
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* struct pcm_prioritized_process_notifier_data - change of prioritized process
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* list passed to the callback
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*
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* @pid: PID of the process being added/removed
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*/
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struct pcm_prioritized_process_notifier_data {
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uint32_t pid;
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};
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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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* pcm_dev: The priority control manager through which the
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* request is being made.
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* task: The task struct of the process requesting the
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* 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
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* use requested_priority.A lower priority value if the process does
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* 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
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* than requested_priority
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*
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* @pcm_prioritized_process_notifier_register: register a callback for changes to the
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* list of prioritized processes
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* pcm_dev: The priority control manager through
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* which the request is being made.
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* nb: notifier block with callback function pointer
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* On Success returns 0 otherwise -1
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*
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* @pcm_prioritized_process_notifier_unregister: unregister the callback for changes to the
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* list of prioritized processes
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* pcm_dev: The priority control manager through
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* which the request is being made.
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* nb: notifier block which will be unregistered
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* On Success returns 0 otherwise -1
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*/
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struct priority_control_manager_ops {
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int (*pcm_scheduler_priority_check)(struct priority_control_manager_device *pcm_dev,
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struct task_struct *task, int requested_priority);
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int (*pcm_prioritized_process_notifier_register)(
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struct priority_control_manager_device *pcm_dev, struct notifier_block *nb);
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int (*pcm_prioritized_process_notifier_unregister)(
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struct priority_control_manager_device *pcm_dev, struct notifier_block *nb);
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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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