diff options
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 1355 |
1 files changed, 1077 insertions, 278 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 90d5a15120d5..0465d1e6f72a 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -1,81 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/include/linux/cpufreq.h * * Copyright (C) 2001 Russell King * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #ifndef _LINUX_CPUFREQ_H #define _LINUX_CPUFREQ_H -#include <asm/cputime.h> -#include <linux/mutex.h> -#include <linux/notifier.h> -#include <linux/threads.h> +#include <linux/clk.h> +#include <linux/cpu.h> +#include <linux/cpumask.h> +#include <linux/completion.h> #include <linux/kobject.h> +#include <linux/notifier.h> +#include <linux/of.h> +#include <linux/pm_opp.h> +#include <linux/pm_qos.h> +#include <linux/spinlock.h> #include <linux/sysfs.h> -#include <linux/completion.h> -#include <linux/workqueue.h> -#include <linux/cpumask.h> -#include <asm/div64.h> - -#define CPUFREQ_NAME_LEN 16 -/* Print length for names. Extra 1 space for accomodating '\n' in prints */ -#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) +#include <linux/minmax.h> /********************************************************************* - * CPUFREQ NOTIFIER INTERFACE * + * CPUFREQ INTERFACE * *********************************************************************/ - -#define CPUFREQ_TRANSITION_NOTIFIER (0) -#define CPUFREQ_POLICY_NOTIFIER (1) - -#ifdef CONFIG_CPU_FREQ -int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); -int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); -extern void disable_cpufreq(void); -#else /* CONFIG_CPU_FREQ */ -static inline int cpufreq_register_notifier(struct notifier_block *nb, - unsigned int list) -{ - return 0; -} -static inline int cpufreq_unregister_notifier(struct notifier_block *nb, - unsigned int list) -{ - return 0; -} -static inline void disable_cpufreq(void) { } -#endif /* CONFIG_CPU_FREQ */ - -/* if (cpufreq_driver->target) exists, the ->governor decides what frequency - * within the limits is used. If (cpufreq_driver->setpolicy> exists, these - * two generic policies are available: +/* + * Frequency values here are CPU kHz */ -#define CPUFREQ_POLICY_POWERSAVE (1) -#define CPUFREQ_POLICY_PERFORMANCE (2) +#define CPUFREQ_DEFAULT_TRANSITION_LATENCY_NS NSEC_PER_MSEC -/* Frequency values here are CPU kHz so that hardware which doesn't run - * with some frequencies can complain without having to guess what per - * cent / per mille means. - * Maximum transition latency is in nanoseconds - if it's unknown, - * CPUFREQ_ETERNAL shall be used. - */ +#define CPUFREQ_NAME_LEN 16 +/* Print length for names. Extra 1 space for accommodating '\n' in prints */ +#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) struct cpufreq_governor; -/* /sys/devices/system/cpu/cpufreq: entry point for global variables */ -extern struct kobject *cpufreq_global_kobject; -int cpufreq_get_global_kobject(void); -void cpufreq_put_global_kobject(void); -int cpufreq_sysfs_create_file(const struct attribute *attr); -void cpufreq_sysfs_remove_file(const struct attribute *attr); +enum cpufreq_table_sorting { + CPUFREQ_TABLE_UNSORTED, + CPUFREQ_TABLE_SORTED_ASCENDING, + CPUFREQ_TABLE_SORTED_DESCENDING +}; -#define CPUFREQ_ETERNAL (-1) struct cpufreq_cpuinfo { unsigned int max_freq; unsigned int min_freq; @@ -84,49 +50,150 @@ struct cpufreq_cpuinfo { unsigned int transition_latency; }; -struct cpufreq_real_policy { - unsigned int min; /* in kHz */ - unsigned int max; /* in kHz */ - unsigned int policy; /* see above */ - struct cpufreq_governor *governor; /* see below */ -}; - struct cpufreq_policy { /* CPUs sharing clock, require sw coordination */ cpumask_var_t cpus; /* Online CPUs only */ cpumask_var_t related_cpus; /* Online + Offline CPUs */ + cpumask_var_t real_cpus; /* Related and present */ unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs should set cpufreq */ - unsigned int cpu; /* cpu nr of CPU managing this policy */ - unsigned int last_cpu; /* cpu nr of previous CPU that managed - * this policy */ + unsigned int cpu; /* cpu managing this policy, must be online */ + + struct clk *clk; struct cpufreq_cpuinfo cpuinfo;/* see above */ unsigned int min; /* in kHz */ unsigned int max; /* in kHz */ unsigned int cur; /* in kHz, only needed if cpufreq * governors are used */ + unsigned int suspend_freq; /* freq to set during suspend */ + unsigned int policy; /* see above */ + unsigned int last_policy; /* policy before unplug */ struct cpufreq_governor *governor; /* see below */ void *governor_data; - bool governor_enabled; /* governor start/stop flag */ + char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ struct work_struct update; /* if update_policy() needs to be * called, but you're in IRQ context */ - struct cpufreq_real_policy user_policy; + struct freq_constraints constraints; + struct freq_qos_request *min_freq_req; + struct freq_qos_request *max_freq_req; + struct cpufreq_frequency_table *freq_table; + enum cpufreq_table_sorting freq_table_sorted; + + struct list_head policy_list; struct kobject kobj; struct completion kobj_unregister; - int transition_ongoing; /* Tracks transition status */ + + /* + * The rules for this semaphore: + * - Any routine that wants to read from the policy structure will + * do a down_read on this semaphore. + * - Any routine that will write to the policy structure and/or may take away + * the policy altogether (eg. CPU hotplug), will hold this lock in write + * mode before doing so. + */ + struct rw_semaphore rwsem; + + /* + * Fast switch flags: + * - fast_switch_possible should be set by the driver if it can + * guarantee that frequency can be changed on any CPU sharing the + * policy and that the change will affect all of the policy CPUs then. + * - fast_switch_enabled is to be set by governors that support fast + * frequency switching with the help of cpufreq_enable_fast_switch(). + */ + bool fast_switch_possible; + bool fast_switch_enabled; + + /* + * Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current + * governor. + */ + bool strict_target; + + /* + * Set if inefficient frequencies were found in the frequency table. + * This indicates if the relation flag CPUFREQ_RELATION_E can be + * honored. + */ + bool efficiencies_available; + + /* + * Preferred average time interval between consecutive invocations of + * the driver to set the frequency for this policy. To be set by the + * scaling driver (0, which is the default, means no preference). + */ + unsigned int transition_delay_us; + + /* + * Remote DVFS flag (Not added to the driver structure as we don't want + * to access another structure from scheduler hotpath). + * + * Should be set if CPUs can do DVFS on behalf of other CPUs from + * different cpufreq policies. + */ + bool dvfs_possible_from_any_cpu; + + /* Per policy boost enabled flag. */ + bool boost_enabled; + + /* Per policy boost supported flag. */ + bool boost_supported; + + /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ + unsigned int cached_target_freq; + unsigned int cached_resolved_idx; + + /* Synchronization for frequency transitions */ + bool transition_ongoing; /* Tracks transition status */ + spinlock_t transition_lock; + wait_queue_head_t transition_wait; + struct task_struct *transition_task; /* Task which is doing the transition */ + + /* cpufreq-stats */ + struct cpufreq_stats *stats; + + /* For cpufreq driver's internal use */ + void *driver_data; + + /* Pointer to the cooling device if used for thermal mitigation */ + struct thermal_cooling_device *cdev; + + struct notifier_block nb_min; + struct notifier_block nb_max; }; -#define CPUFREQ_ADJUST (0) -#define CPUFREQ_INCOMPATIBLE (1) -#define CPUFREQ_NOTIFY (2) -#define CPUFREQ_START (3) -#define CPUFREQ_UPDATE_POLICY_CPU (4) +DEFINE_GUARD(cpufreq_policy_write, struct cpufreq_policy *, + down_write(&_T->rwsem), up_write(&_T->rwsem)) + +DEFINE_GUARD(cpufreq_policy_read, struct cpufreq_policy *, + down_read(&_T->rwsem), up_read(&_T->rwsem)) + +/* + * Used for passing new cpufreq policy data to the cpufreq driver's ->verify() + * callback for sanitization. That callback is only expected to modify the min + * and max values, if necessary, and specifically it must not update the + * frequency table. + */ +struct cpufreq_policy_data { + struct cpufreq_cpuinfo cpuinfo; + struct cpufreq_frequency_table *freq_table; + unsigned int cpu; + unsigned int min; /* in kHz */ + unsigned int max; /* in kHz */ +}; + +struct cpufreq_freqs { + struct cpufreq_policy *policy; + unsigned int old; + unsigned int new; + u8 flags; /* flags of cpufreq_driver, see below. */ +}; /* Only for ACPI */ #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ @@ -134,25 +201,351 @@ struct cpufreq_policy { #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ +#ifdef CONFIG_CPU_FREQ +struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); +struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); +void cpufreq_cpu_put(struct cpufreq_policy *policy); +#else +static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) +{ + return NULL; +} +static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) +{ + return NULL; +} +static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } +#endif + +/* Scope based cleanup macro for cpufreq_policy kobject reference counting */ +DEFINE_FREE(put_cpufreq_policy, struct cpufreq_policy *, if (_T) cpufreq_cpu_put(_T)) + +static inline bool policy_is_inactive(struct cpufreq_policy *policy) +{ + return cpumask_empty(policy->cpus); +} + static inline bool policy_is_shared(struct cpufreq_policy *policy) { return cpumask_weight(policy->cpus) > 1; } -/******************** cpufreq transition notifiers *******************/ +#ifdef CONFIG_CPU_FREQ +unsigned int cpufreq_get(unsigned int cpu); +unsigned int cpufreq_quick_get(unsigned int cpu); +unsigned int cpufreq_quick_get_max(unsigned int cpu); +unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); +void disable_cpufreq(void); -#define CPUFREQ_PRECHANGE (0) -#define CPUFREQ_POSTCHANGE (1) -#define CPUFREQ_RESUMECHANGE (8) -#define CPUFREQ_SUSPENDCHANGE (9) +u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); -struct cpufreq_freqs { - unsigned int cpu; /* cpu nr */ - unsigned int old; - unsigned int new; - u8 flags; /* flags of cpufreq_driver, see below. */ +void refresh_frequency_limits(struct cpufreq_policy *policy); +void cpufreq_update_policy(unsigned int cpu); +void cpufreq_update_limits(unsigned int cpu); +bool have_governor_per_policy(void); +bool cpufreq_supports_freq_invariance(void); +struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); +void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); +void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); +bool has_target_index(void); + +DECLARE_PER_CPU(unsigned long, cpufreq_pressure); +static inline unsigned long cpufreq_get_pressure(int cpu) +{ + return READ_ONCE(per_cpu(cpufreq_pressure, cpu)); +} +#else +static inline unsigned int cpufreq_get(unsigned int cpu) +{ + return 0; +} +static inline unsigned int cpufreq_quick_get(unsigned int cpu) +{ + return 0; +} +static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) +{ + return 0; +} +static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) +{ + return 0; +} +static inline bool cpufreq_supports_freq_invariance(void) +{ + return false; +} +static inline void disable_cpufreq(void) { } +static inline void cpufreq_update_limits(unsigned int cpu) { } +static inline unsigned long cpufreq_get_pressure(int cpu) +{ + return 0; +} +#endif + +#ifdef CONFIG_CPU_FREQ_STAT +void cpufreq_stats_create_table(struct cpufreq_policy *policy); +void cpufreq_stats_free_table(struct cpufreq_policy *policy); +void cpufreq_stats_record_transition(struct cpufreq_policy *policy, + unsigned int new_freq); +#else +static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } +static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } +static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, + unsigned int new_freq) { } +#endif /* CONFIG_CPU_FREQ_STAT */ + +/********************************************************************* + * CPUFREQ DRIVER INTERFACE * + *********************************************************************/ + +#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ +#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ +#define CPUFREQ_RELATION_C 2 /* closest frequency to target */ +/* relation flags */ +#define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */ + +#define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E) +#define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E) +#define CPUFREQ_RELATION_CE (CPUFREQ_RELATION_C | CPUFREQ_RELATION_E) + +struct freq_attr { + struct attribute attr; + ssize_t (*show)(struct cpufreq_policy *, char *); + ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); +}; + +#define cpufreq_freq_attr_ro(_name) \ +static struct freq_attr _name = \ +__ATTR(_name, 0444, show_##_name, NULL) + +#define cpufreq_freq_attr_ro_perm(_name, _perm) \ +static struct freq_attr _name = \ +__ATTR(_name, _perm, show_##_name, NULL) + +#define cpufreq_freq_attr_rw(_name) \ +static struct freq_attr _name = \ +__ATTR(_name, 0644, show_##_name, store_##_name) + +#define cpufreq_freq_attr_wo(_name) \ +static struct freq_attr _name = \ +__ATTR(_name, 0200, NULL, store_##_name) + +#define define_one_global_ro(_name) \ +static struct kobj_attribute _name = \ +__ATTR(_name, 0444, show_##_name, NULL) + +#define define_one_global_rw(_name) \ +static struct kobj_attribute _name = \ +__ATTR(_name, 0644, show_##_name, store_##_name) + + +struct cpufreq_driver { + char name[CPUFREQ_NAME_LEN]; + u16 flags; + void *driver_data; + + /* needed by all drivers */ + int (*init)(struct cpufreq_policy *policy); + int (*verify)(struct cpufreq_policy_data *policy); + + /* define one out of two */ + int (*setpolicy)(struct cpufreq_policy *policy); + + int (*target)(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation); /* Deprecated */ + int (*target_index)(struct cpufreq_policy *policy, + unsigned int index); + unsigned int (*fast_switch)(struct cpufreq_policy *policy, + unsigned int target_freq); + /* + * ->fast_switch() replacement for drivers that use an internal + * representation of performance levels and can pass hints other than + * the target performance level to the hardware. This can only be set + * if ->fast_switch is set too, because in those cases (under specific + * conditions) scale invariance can be disabled, which causes the + * schedutil governor to fall back to the latter. + */ + void (*adjust_perf)(unsigned int cpu, + unsigned long min_perf, + unsigned long target_perf, + unsigned long capacity); + + /* + * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION + * unset. + * + * get_intermediate should return a stable intermediate frequency + * platform wants to switch to and target_intermediate() should set CPU + * to that frequency, before jumping to the frequency corresponding + * to 'index'. Core will take care of sending notifications and driver + * doesn't have to handle them in target_intermediate() or + * target_index(). + * + * Drivers can return '0' from get_intermediate() in case they don't + * wish to switch to intermediate frequency for some target frequency. + * In that case core will directly call ->target_index(). + */ + unsigned int (*get_intermediate)(struct cpufreq_policy *policy, + unsigned int index); + int (*target_intermediate)(struct cpufreq_policy *policy, + unsigned int index); + + /* should be defined, if possible, return 0 on error */ + unsigned int (*get)(unsigned int cpu); + + /* Called to update policy limits on firmware notifications. */ + void (*update_limits)(struct cpufreq_policy *policy); + + /* optional */ + int (*bios_limit)(int cpu, unsigned int *limit); + + int (*online)(struct cpufreq_policy *policy); + int (*offline)(struct cpufreq_policy *policy); + void (*exit)(struct cpufreq_policy *policy); + int (*suspend)(struct cpufreq_policy *policy); + int (*resume)(struct cpufreq_policy *policy); + + /* Will be called after the driver is fully initialized */ + void (*ready)(struct cpufreq_policy *policy); + + struct freq_attr **attr; + + /* platform specific boost support code */ + bool boost_enabled; + int (*set_boost)(struct cpufreq_policy *policy, int state); + + /* + * Set by drivers that want to register with the energy model after the + * policy is properly initialized, but before the governor is started. + */ + void (*register_em)(struct cpufreq_policy *policy); }; +/* flags */ + +/* + * Set by drivers that need to update internal upper and lower boundaries along + * with the target frequency and so the core and governors should also invoke + * the diver if the target frequency does not change, but the policy min or max + * may have changed. + */ +#define CPUFREQ_NEED_UPDATE_LIMITS BIT(0) + +/* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ +#define CPUFREQ_CONST_LOOPS BIT(1) + +/* + * Set by drivers that want the core to automatically register the cpufreq + * driver as a thermal cooling device. + */ +#define CPUFREQ_IS_COOLING_DEV BIT(2) + +/* + * This should be set by platforms having multiple clock-domains, i.e. + * supporting multiple policies. With this sysfs directories of governor would + * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same + * governor with different tunables for different clusters. + */ +#define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) + +/* + * Driver will do POSTCHANGE notifications from outside of their ->target() + * routine and so must set cpufreq_driver->flags with this flag, so that core + * can handle them specially. + */ +#define CPUFREQ_ASYNC_NOTIFICATION BIT(4) + +/* + * Set by drivers which want cpufreq core to check if CPU is running at a + * frequency present in freq-table exposed by the driver. For these drivers if + * CPU is found running at an out of table freq, we will try to set it to a freq + * from the table. And if that fails, we will stop further boot process by + * issuing a BUG_ON(). + */ +#define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) + +/* + * Set by drivers to disallow use of governors with "dynamic_switching" flag + * set. + */ +#define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) + +int cpufreq_register_driver(struct cpufreq_driver *driver_data); +void cpufreq_unregister_driver(struct cpufreq_driver *driver_data); + +bool cpufreq_driver_test_flags(u16 flags); +const char *cpufreq_get_current_driver(void); +void *cpufreq_get_driver_data(void); + +static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv) +{ + return IS_ENABLED(CONFIG_CPU_THERMAL) && + (drv->flags & CPUFREQ_IS_COOLING_DEV); +} + +static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy, + unsigned int min, + unsigned int max) +{ + policy->max = clamp(policy->max, min, max); + policy->min = clamp(policy->min, min, policy->max); +} + +static inline void +cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy) +{ + cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, + policy->cpuinfo.max_freq); +} + +#ifdef CONFIG_CPU_FREQ +void cpufreq_suspend(void); +void cpufreq_resume(void); +int cpufreq_generic_suspend(struct cpufreq_policy *policy); +#else +static inline void cpufreq_suspend(void) {} +static inline void cpufreq_resume(void) {} +#endif + +/********************************************************************* + * CPUFREQ NOTIFIER INTERFACE * + *********************************************************************/ + +#define CPUFREQ_TRANSITION_NOTIFIER (0) +#define CPUFREQ_POLICY_NOTIFIER (1) + +/* Transition notifiers */ +#define CPUFREQ_PRECHANGE (0) +#define CPUFREQ_POSTCHANGE (1) + +/* Policy Notifiers */ +#define CPUFREQ_CREATE_POLICY (0) +#define CPUFREQ_REMOVE_POLICY (1) + +#ifdef CONFIG_CPU_FREQ +int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); +int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); + +void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs); +void cpufreq_freq_transition_end(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs, int transition_failed); + +#else /* CONFIG_CPU_FREQ */ +static inline int cpufreq_register_notifier(struct notifier_block *nb, + unsigned int list) +{ + return 0; +} +static inline int cpufreq_unregister_notifier(struct notifier_block *nb, + unsigned int list) +{ + return 0; +} +#endif /* !CONFIG_CPU_FREQ */ + /** * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch * safe) @@ -167,279 +560,685 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult) { #if BITS_PER_LONG == 32 - u64 result = ((u64) old) * ((u64) mult); do_div(result, div); return (unsigned long) result; #elif BITS_PER_LONG == 64 - unsigned long result = old * ((u64) mult); result /= div; return result; - #endif -}; +} /********************************************************************* * CPUFREQ GOVERNORS * *********************************************************************/ -#define CPUFREQ_GOV_START 1 -#define CPUFREQ_GOV_STOP 2 -#define CPUFREQ_GOV_LIMITS 3 -#define CPUFREQ_GOV_POLICY_INIT 4 -#define CPUFREQ_GOV_POLICY_EXIT 5 +#define CPUFREQ_POLICY_UNKNOWN (0) +/* + * If (cpufreq_driver->target) exists, the ->governor decides what frequency + * within the limits is used. If (cpufreq_driver->setpolicy> exists, these + * two generic policies are available: + */ +#define CPUFREQ_POLICY_POWERSAVE (1) +#define CPUFREQ_POLICY_PERFORMANCE (2) struct cpufreq_governor { char name[CPUFREQ_NAME_LEN]; - int initialized; - int (*governor) (struct cpufreq_policy *policy, - unsigned int event); + int (*init)(struct cpufreq_policy *policy); + void (*exit)(struct cpufreq_policy *policy); + int (*start)(struct cpufreq_policy *policy); + void (*stop)(struct cpufreq_policy *policy); + void (*limits)(struct cpufreq_policy *policy); ssize_t (*show_setspeed) (struct cpufreq_policy *policy, char *buf); int (*store_setspeed) (struct cpufreq_policy *policy, unsigned int freq); - unsigned int max_transition_latency; /* HW must be able to switch to - next freq faster than this value in nano secs or we - will fallback to performance governor */ struct list_head governor_list; struct module *owner; + u8 flags; }; -/* - * Pass a target to the cpufreq driver. - */ -extern int cpufreq_driver_target(struct cpufreq_policy *policy, +/* Governor flags */ + +/* For governors which change frequency dynamically by themselves */ +#define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0) + +/* For governors wanting the target frequency to be set exactly */ +#define CPUFREQ_GOV_STRICT_TARGET BIT(1) + + +/* Pass a target to the cpufreq driver */ +unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, + unsigned int target_freq); +void cpufreq_driver_adjust_perf(unsigned int cpu, + unsigned long min_perf, + unsigned long target_perf, + unsigned long capacity); +bool cpufreq_driver_has_adjust_perf(void); +int cpufreq_driver_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation); -extern int __cpufreq_driver_target(struct cpufreq_policy *policy, +int __cpufreq_driver_target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation); - -extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy, - unsigned int cpu); - +unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, + unsigned int target_freq); +unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy); int cpufreq_register_governor(struct cpufreq_governor *governor); void cpufreq_unregister_governor(struct cpufreq_governor *governor); +int cpufreq_start_governor(struct cpufreq_policy *policy); +void cpufreq_stop_governor(struct cpufreq_policy *policy); + +#define cpufreq_governor_init(__governor) \ +static int __init __governor##_init(void) \ +{ \ + return cpufreq_register_governor(&__governor); \ +} \ +core_initcall(__governor##_init) + +#define cpufreq_governor_exit(__governor) \ +static void __exit __governor##_exit(void) \ +{ \ + return cpufreq_unregister_governor(&__governor); \ +} \ +module_exit(__governor##_exit) + +struct cpufreq_governor *cpufreq_default_governor(void); +struct cpufreq_governor *cpufreq_fallback_governor(void); + +#ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL +bool sugov_is_governor(struct cpufreq_policy *policy); +#else +static inline bool sugov_is_governor(struct cpufreq_policy *policy) +{ + return false; +} +#endif + +static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) +{ + if (policy->max < policy->cur) + __cpufreq_driver_target(policy, policy->max, + CPUFREQ_RELATION_HE); + else if (policy->min > policy->cur) + __cpufreq_driver_target(policy, policy->min, + CPUFREQ_RELATION_LE); +} + +/* Governor attribute set */ +struct gov_attr_set { + struct kobject kobj; + struct list_head policy_list; + struct mutex update_lock; + int usage_count; +}; + +/* sysfs ops for cpufreq governors */ +extern const struct sysfs_ops governor_sysfs_ops; + +static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj) +{ + return container_of(kobj, struct gov_attr_set, kobj); +} + +void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); +void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); +unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); + +/* Governor sysfs attribute */ +struct governor_attr { + struct attribute attr; + ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); + ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, + size_t count); +}; /********************************************************************* - * CPUFREQ DRIVER INTERFACE * + * FREQUENCY TABLE HELPERS * *********************************************************************/ -#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ -#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ +/* Special Values of .frequency field */ +#define CPUFREQ_ENTRY_INVALID ~0u +#define CPUFREQ_TABLE_END ~1u +/* Special Values of .flags field */ +#define CPUFREQ_BOOST_FREQ (1 << 0) +#define CPUFREQ_INEFFICIENT_FREQ (1 << 1) -struct freq_attr; +struct cpufreq_frequency_table { + unsigned int flags; + unsigned int driver_data; /* driver specific data, not used by core */ + unsigned int frequency; /* kHz - doesn't need to be in ascending + * order */ +}; -struct cpufreq_driver { - struct module *owner; - char name[CPUFREQ_NAME_LEN]; - u8 flags; - /* - * This should be set by platforms having multiple clock-domains, i.e. - * supporting multiple policies. With this sysfs directories of governor - * would be created in cpu/cpu<num>/cpufreq/ directory and so they can - * use the same governor with different tunables for different clusters. - */ - bool have_governor_per_policy; +/* + * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + */ - /* needed by all drivers */ - int (*init) (struct cpufreq_policy *policy); - int (*verify) (struct cpufreq_policy *policy); +#define cpufreq_for_each_entry(pos, table) \ + for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) - /* define one out of two */ - int (*setpolicy) (struct cpufreq_policy *policy); - int (*target) (struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation); +/* + * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table + * with index + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + * @idx: the table entry currently being processed + */ - /* should be defined, if possible */ - unsigned int (*get) (unsigned int cpu); +#define cpufreq_for_each_entry_idx(pos, table, idx) \ + for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ + pos++, idx++) - /* optional */ - unsigned int (*getavg) (struct cpufreq_policy *policy, - unsigned int cpu); - int (*bios_limit) (int cpu, unsigned int *limit); - - int (*exit) (struct cpufreq_policy *policy); - int (*suspend) (struct cpufreq_policy *policy); - int (*resume) (struct cpufreq_policy *policy); - struct freq_attr **attr; -}; +/* + * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table + * excluding CPUFREQ_ENTRY_INVALID frequencies. + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + */ -/* flags */ +#define cpufreq_for_each_valid_entry(pos, table) \ + for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ + if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ + continue; \ + else + +/* + * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq + * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies. + * @pos: the cpufreq_frequency_table * to use as a loop cursor. + * @table: the cpufreq_frequency_table * to iterate over. + * @idx: the table entry currently being processed + */ -#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if - * all ->init() calls failed */ -#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel - * "constants" aren't affected by - * frequency transitions */ -#define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed - * mismatches */ +#define cpufreq_for_each_valid_entry_idx(pos, table, idx) \ + cpufreq_for_each_entry_idx(pos, table, idx) \ + if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ + continue; \ + else -int cpufreq_register_driver(struct cpufreq_driver *driver_data); -int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); +/** + * cpufreq_for_each_efficient_entry_idx - iterate with index over a cpufreq + * frequency_table excluding CPUFREQ_ENTRY_INVALID and + * CPUFREQ_INEFFICIENT_FREQ frequencies. + * @pos: the &struct cpufreq_frequency_table to use as a loop cursor. + * @table: the &struct cpufreq_frequency_table to iterate over. + * @idx: the table entry currently being processed. + * @efficiencies: set to true to only iterate over efficient frequencies. + */ + +#define cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) \ + cpufreq_for_each_valid_entry_idx(pos, table, idx) \ + if (efficiencies && (pos->flags & CPUFREQ_INEFFICIENT_FREQ)) \ + continue; \ + else + + +int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy); -void cpufreq_notify_transition(struct cpufreq_policy *policy, - struct cpufreq_freqs *freqs, unsigned int state); +int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy); -static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, - unsigned int min, unsigned int max) +int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy); + +int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, + unsigned int target_freq, unsigned int min, + unsigned int max, unsigned int relation); +int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, + unsigned int freq); + +ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); + +#ifdef CONFIG_CPU_FREQ +bool cpufreq_boost_enabled(void); +int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state); + +/* Find lowest freq at or above target in a table in ascending order */ +static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) { - if (policy->min < min) - policy->min = min; - if (policy->max < min) - policy->max = min; - if (policy->min > max) - policy->min = max; - if (policy->max > max) - policy->max = max; - if (policy->min > policy->max) - policy->min = policy->max; - return; + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; + + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; + + if (freq >= target_freq) + return idx; + + best = idx; + } + + return best; } -struct freq_attr { - struct attribute attr; - ssize_t (*show)(struct cpufreq_policy *, char *); - ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); -}; +/* Find lowest freq at or above target in a table in descending order */ +static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; -#define cpufreq_freq_attr_ro(_name) \ -static struct freq_attr _name = \ -__ATTR(_name, 0444, show_##_name, NULL) + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; -#define cpufreq_freq_attr_ro_perm(_name, _perm) \ -static struct freq_attr _name = \ -__ATTR(_name, _perm, show_##_name, NULL) + if (freq == target_freq) + return idx; -#define cpufreq_freq_attr_rw(_name) \ -static struct freq_attr _name = \ -__ATTR(_name, 0644, show_##_name, store_##_name) + if (freq > target_freq) { + best = idx; + continue; + } -struct global_attr { - struct attribute attr; - ssize_t (*show)(struct kobject *kobj, - struct attribute *attr, char *buf); - ssize_t (*store)(struct kobject *a, struct attribute *b, - const char *c, size_t count); -}; + /* No freq found above target_freq */ + if (best == -1) + return idx; -#define define_one_global_ro(_name) \ -static struct global_attr _name = \ -__ATTR(_name, 0444, show_##_name, NULL) + return best; + } -#define define_one_global_rw(_name) \ -static struct global_attr _name = \ -__ATTR(_name, 0644, show_##_name, store_##_name) + return best; +} -struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); -void cpufreq_cpu_put(struct cpufreq_policy *data); -const char *cpufreq_get_current_driver(void); +static inline int find_index_l(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int min, unsigned int max, + bool efficiencies) +{ + target_freq = clamp_val(target_freq, min, max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_al(policy, target_freq, + efficiencies); + else + return cpufreq_table_find_index_dl(policy, target_freq, + efficiencies); +} -/********************************************************************* - * CPUFREQ 2.6. INTERFACE * - *********************************************************************/ -u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); -int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); -int cpufreq_update_policy(unsigned int cpu); -bool have_governor_per_policy(void); -struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + return find_index_l(policy, target_freq, policy->min, policy->max, efficiencies); +} -#ifdef CONFIG_CPU_FREQ -/* - * query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it - */ -unsigned int cpufreq_get(unsigned int cpu); -#else -static inline unsigned int cpufreq_get(unsigned int cpu) +/* Find highest freq at or below target in a table in ascending order */ +static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) { - return 0; + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; + + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; + + if (freq == target_freq) + return idx; + + if (freq < target_freq) { + best = idx; + continue; + } + + /* No freq found below target_freq */ + if (best == -1) + return idx; + + return best; + } + + return best; } -#endif -/* - * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it +/* Find highest freq at or below target in a table in descending order */ +static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; + + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; + + if (freq <= target_freq) + return idx; + + best = idx; + } + + return best; +} + +static inline int find_index_h(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int min, unsigned int max, + bool efficiencies) +{ + target_freq = clamp_val(target_freq, min, max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_ah(policy, target_freq, + efficiencies); + else + return cpufreq_table_find_index_dh(policy, target_freq, + efficiencies); +} + +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + return find_index_h(policy, target_freq, policy->min, policy->max, efficiencies); +} + +/* Find closest freq to target in a table in ascending order */ +static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; + + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; + + if (freq == target_freq) + return idx; + + if (freq < target_freq) { + best = idx; + continue; + } + + /* No freq found below target_freq */ + if (best == -1) + return idx; + + /* Choose the closest freq */ + if (target_freq - table[best].frequency > freq - target_freq) + return idx; + + return best; + } + + return best; +} + +/* Find closest freq to target in a table in descending order */ +static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + struct cpufreq_frequency_table *table = policy->freq_table; + struct cpufreq_frequency_table *pos; + unsigned int freq; + int idx, best = -1; + + cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { + freq = pos->frequency; + + if (freq == target_freq) + return idx; + + if (freq > target_freq) { + best = idx; + continue; + } + + /* No freq found above target_freq */ + if (best == -1) + return idx; + + /* Choose the closest freq */ + if (table[best].frequency - target_freq > target_freq - freq) + return idx; + + return best; + } + + return best; +} + +static inline int find_index_c(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int min, unsigned int max, + bool efficiencies) +{ + target_freq = clamp_val(target_freq, min, max); + + if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) + return cpufreq_table_find_index_ac(policy, target_freq, + efficiencies); + else + return cpufreq_table_find_index_dc(policy, target_freq, + efficiencies); +} + +/* Works only on sorted freq-tables */ +static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, + unsigned int target_freq, + bool efficiencies) +{ + return find_index_c(policy, target_freq, policy->min, policy->max, efficiencies); +} + +static inline bool cpufreq_is_in_limits(struct cpufreq_policy *policy, + unsigned int min, unsigned int max, + int idx) +{ + unsigned int freq; + + if (idx < 0) + return false; + + freq = policy->freq_table[idx].frequency; + + return freq == clamp_val(freq, min, max); +} + +static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int min, + unsigned int max, + unsigned int relation) +{ + bool efficiencies = policy->efficiencies_available && + (relation & CPUFREQ_RELATION_E); + int idx; + + /* cpufreq_table_index_unsorted() has no use for this flag anyway */ + relation &= ~CPUFREQ_RELATION_E; + + if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) + return cpufreq_table_index_unsorted(policy, target_freq, min, + max, relation); +retry: + switch (relation) { + case CPUFREQ_RELATION_L: + idx = find_index_l(policy, target_freq, min, max, efficiencies); + break; + case CPUFREQ_RELATION_H: + idx = find_index_h(policy, target_freq, min, max, efficiencies); + break; + case CPUFREQ_RELATION_C: + idx = find_index_c(policy, target_freq, min, max, efficiencies); + break; + default: + WARN_ON_ONCE(1); + return 0; + } + + /* Limit frequency index to honor min and max */ + if (!cpufreq_is_in_limits(policy, min, max, idx) && efficiencies) { + efficiencies = false; + goto retry; + } + + return idx; +} + +static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy) +{ + struct cpufreq_frequency_table *pos; + int count = 0; + + if (unlikely(!policy->freq_table)) + return 0; + + cpufreq_for_each_valid_entry(pos, policy->freq_table) + count++; + + return count; +} + +/** + * cpufreq_table_set_inefficient() - Mark a frequency as inefficient + * @policy: the &struct cpufreq_policy containing the inefficient frequency + * @frequency: the inefficient frequency + * + * The &struct cpufreq_policy must use a sorted frequency table + * + * Return: %0 on success or a negative errno code */ -#ifdef CONFIG_CPU_FREQ -unsigned int cpufreq_quick_get(unsigned int cpu); -unsigned int cpufreq_quick_get_max(unsigned int cpu); -#else -static inline unsigned int cpufreq_quick_get(unsigned int cpu) + +static inline int +cpufreq_table_set_inefficient(struct cpufreq_policy *policy, + unsigned int frequency) { - return 0; + struct cpufreq_frequency_table *pos; + + /* Not supported */ + if (policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED) + return -EINVAL; + + cpufreq_for_each_valid_entry(pos, policy->freq_table) { + if (pos->frequency == frequency) { + pos->flags |= CPUFREQ_INEFFICIENT_FREQ; + policy->efficiencies_available = true; + return 0; + } + } + + return -EINVAL; } -static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) + +static inline int parse_perf_domain(int cpu, const char *list_name, + const char *cell_name, + struct of_phandle_args *args) { + int ret; + + struct device_node *cpu_np __free(device_node) = of_cpu_device_node_get(cpu); + if (!cpu_np) + return -ENODEV; + + ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0, + args); + if (ret < 0) + return ret; return 0; } -#endif -/********************************************************************* - * CPUFREQ DEFAULT GOVERNOR * - *********************************************************************/ +static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name, + const char *cell_name, struct cpumask *cpumask, + struct of_phandle_args *pargs) +{ + int cpu, ret; + struct of_phandle_args args; -/* - * Performance governor is fallback governor if any other gov failed to auto - * load due latency restrictions - */ -#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE -extern struct cpufreq_governor cpufreq_gov_performance; -#endif -#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE -#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) -#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) -extern struct cpufreq_governor cpufreq_gov_powersave; -#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) -#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) -extern struct cpufreq_governor cpufreq_gov_userspace; -#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) -#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) -extern struct cpufreq_governor cpufreq_gov_ondemand; -#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) -#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) -extern struct cpufreq_governor cpufreq_gov_conservative; -#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) -#endif + ret = parse_perf_domain(pcpu, list_name, cell_name, pargs); + if (ret < 0) + return ret; -/********************************************************************* - * FREQUENCY TABLE HELPERS * - *********************************************************************/ + cpumask_set_cpu(pcpu, cpumask); -#define CPUFREQ_ENTRY_INVALID ~0 -#define CPUFREQ_TABLE_END ~1 + for_each_possible_cpu(cpu) { + if (cpu == pcpu) + continue; -struct cpufreq_frequency_table { - unsigned int driver_data; /* driver specific data, not used by core */ - unsigned int frequency; /* kHz - doesn't need to be in ascending - * order */ -}; + ret = parse_perf_domain(cpu, list_name, cell_name, &args); + if (ret < 0) + continue; -int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table); + if (of_phandle_args_equal(pargs, &args)) + cpumask_set_cpu(cpu, cpumask); -int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table); + of_node_put(args.np); + } -int cpufreq_frequency_table_target(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table, - unsigned int target_freq, - unsigned int relation, - unsigned int *index); + return 0; +} +#else +static inline bool cpufreq_boost_enabled(void) +{ + return false; +} + +static inline int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state) +{ + return -EOPNOTSUPP; +} -/* the following 3 funtions are for cpufreq core use only */ -struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); +static inline int +cpufreq_table_set_inefficient(struct cpufreq_policy *policy, + unsigned int frequency) +{ + return -EINVAL; +} + +static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name, + const char *cell_name, struct cpumask *cpumask, + struct of_phandle_args *pargs) +{ + return -EOPNOTSUPP; +} +#endif + +extern int arch_freq_get_on_cpu(int cpu); + +#ifndef arch_set_freq_scale +static __always_inline +void arch_set_freq_scale(const struct cpumask *cpus, + unsigned long cur_freq, + unsigned long max_freq) +{ +} +#endif /* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; +extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; +int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy); -void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, - unsigned int cpu); -void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy); +unsigned int cpufreq_generic_get(unsigned int cpu); +void cpufreq_generic_init(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + unsigned int transition_latency); -void cpufreq_frequency_table_put_attr(unsigned int cpu); - -ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); +bool cpufreq_ready_for_eas(const struct cpumask *cpu_mask); +static inline void cpufreq_register_em_with_opp(struct cpufreq_policy *policy) +{ + dev_pm_opp_of_register_em(get_cpu_device(policy->cpu), + policy->related_cpus); +} #endif /* _LINUX_CPUFREQ_H */ |