diff options
Diffstat (limited to 'common/include/linux/priority_control_manager.h')
| -rw-r--r-- | common/include/linux/priority_control_manager.h | 89 |
1 files changed, 67 insertions, 22 deletions
diff --git a/common/include/linux/priority_control_manager.h b/common/include/linux/priority_control_manager.h index a6b1519..d82419e 100644 --- a/common/include/linux/priority_control_manager.h +++ b/common/include/linux/priority_control_manager.h @@ -1,7 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * - * (C) COPYRIGHT 2020-2021 ARM Limited. All rights reserved. + * (C) COPYRIGHT 2020-2023 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 @@ -29,32 +29,77 @@ struct priority_control_manager_device; /** + * DOC: PCM notifier callback types + * + * ADD_PRIORITIZED_PROCESS - indicate that work items for this process should be + * given priority over the work items from other + * processes that were assigned the same static + * priority level. Processes that would benefit from + * being added to this list includes foreground + * applications, as well as any other latency-sensitive + * applications. + * + * REMOVE_PRIORITIZED_PROCESS - indicate that work items for this process + * should no longer be prioritized over other work + * items given the same static priority level. + */ +#define ADD_PRIORITIZED_PROCESS 0 +#define REMOVE_PRIORITIZED_PROCESS 1 + +/** + * struct pcm_prioritized_process_notifier_data - change of prioritized process + * list passed to the callback + * + * @pid: PID of the process being added/removed + */ +struct pcm_prioritized_process_notifier_data { + uint32_t pid; +}; + +/** * 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 + * 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 + * + * @pcm_prioritized_process_notifier_register: register a callback for changes to the + * list of prioritized processes + * pcm_dev: The priority control manager through + * which the request is being made. + * nb: notifier block with callback function pointer + * On Success returns 0 otherwise -1 + * + * @pcm_prioritized_process_notifier_unregister: unregister the callback for changes to the + * list of prioritized processes + * pcm_dev: The priority control manager through + * which the request is being made. + * nb: notifier block which will be unregistered + * On Success returns 0 otherwise -1 */ 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); + int (*pcm_scheduler_priority_check)(struct priority_control_manager_device *pcm_dev, + struct task_struct *task, int requested_priority); + + int (*pcm_prioritized_process_notifier_register)( + struct priority_control_manager_device *pcm_dev, struct notifier_block *nb); + + int (*pcm_prioritized_process_notifier_unregister)( + struct priority_control_manager_device *pcm_dev, struct notifier_block *nb); }; /** |