/* SPDX-License-Identifier: GPL-2.0-only */ /* * drivers/cpufreq/cpufreq_governor.h * * Header file for CPUFreq governors common code * * Copyright (C) 2001 Russell King * (C) 2003 Venkatesh Pallipadi <[email protected]>. * (C) 2003 Jun Nakajima <[email protected]> * (C) 2009 Alexander Clouter <[email protected]> * (c) 2012 Viresh Kumar <[email protected]> */ #ifndef _CPUFREQ_GOVERNOR_H #define _CPUFREQ_GOVERNOR_H #include <linux/atomic.h> #include <linux/irq_work.h> #include <linux/cpufreq.h> #include <linux/sched/cpufreq.h> #include <linux/kernel_stat.h> #include <linux/module.h> #include <linux/mutex.h> /* Ondemand Sampling types */ enum { … }; /* * Abbreviations: * dbs: used as a shortform for demand based switching It helps to keep variable * names smaller, simpler * cdbs: common dbs * od_*: On-demand governor * cs_*: Conservative governor */ /* Governor demand based switching data (per-policy or global). */ struct dbs_data { … }; static inline struct dbs_data *to_dbs_data(struct gov_attr_set *attr_set) { … } #define gov_show_one(_gov, file_name) … #define gov_show_one_common(file_name) … #define gov_attr_ro(_name) … #define gov_attr_rw(_name) … /* Common to all CPUs of a policy */ struct policy_dbs_info { … }; static inline void gov_update_sample_delay(struct policy_dbs_info *policy_dbs, unsigned int delay_us) { … } /* Per cpu structures */ struct cpu_dbs_info { … }; /* Common Governor data across policies */ struct dbs_governor { … }; static inline struct dbs_governor *dbs_governor_of(struct cpufreq_policy *policy) { … } /* Governor callback routines */ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy); void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy); int cpufreq_dbs_governor_start(struct cpufreq_policy *policy); void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy); void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy); #define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) … /* Governor specific operations */ struct od_ops { … }; unsigned int dbs_update(struct cpufreq_policy *policy); void od_register_powersave_bias_handler(unsigned int (*f) (struct cpufreq_policy *, unsigned int, unsigned int), unsigned int powersave_bias); void od_unregister_powersave_bias_handler(void); ssize_t sampling_rate_store(struct gov_attr_set *attr_set, const char *buf, size_t count); void gov_update_cpu_data(struct dbs_data *dbs_data); #endif /* _CPUFREQ_GOVERNOR_H */
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