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1059 lines
32 KiB
1059 lines
32 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* linux/include/linux/cpufreq.h |
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* |
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* Copyright (C) 2001 Russell King |
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* (C) 2002 - 2003 Dominik Brodowski <[email protected]> |
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*/ |
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#ifndef _LINUX_CPUFREQ_H |
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#define _LINUX_CPUFREQ_H |
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|
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#include <linux/clk.h> |
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#include <linux/cpumask.h> |
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#include <linux/completion.h> |
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#include <linux/kobject.h> |
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#include <linux/notifier.h> |
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#include <linux/pm_qos.h> |
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#include <linux/spinlock.h> |
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#include <linux/sysfs.h> |
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|
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/********************************************************************* |
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* CPUFREQ INTERFACE * |
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*********************************************************************/ |
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/* |
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* Frequency values here are CPU kHz |
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* |
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* Maximum transition latency is in nanoseconds - if it's unknown, |
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* CPUFREQ_ETERNAL shall be used. |
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*/ |
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#define CPUFREQ_ETERNAL (-1) |
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#define CPUFREQ_NAME_LEN 16 |
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/* Print length for names. Extra 1 space for accommodating '\n' in prints */ |
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#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
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struct cpufreq_governor; |
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enum cpufreq_table_sorting { |
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CPUFREQ_TABLE_UNSORTED, |
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CPUFREQ_TABLE_SORTED_ASCENDING, |
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CPUFREQ_TABLE_SORTED_DESCENDING |
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}; |
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struct cpufreq_cpuinfo { |
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unsigned int max_freq; |
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unsigned int min_freq; |
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|
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/* in 10^(-9) s = nanoseconds */ |
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unsigned int transition_latency; |
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}; |
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struct cpufreq_policy { |
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/* CPUs sharing clock, require sw coordination */ |
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cpumask_var_t cpus; /* Online CPUs only */ |
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cpumask_var_t related_cpus; /* Online + Offline CPUs */ |
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cpumask_var_t real_cpus; /* Related and present */ |
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unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
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should set cpufreq */ |
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unsigned int cpu; /* cpu managing this policy, must be online */ |
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struct clk *clk; |
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struct cpufreq_cpuinfo cpuinfo;/* see above */ |
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unsigned int min; /* in kHz */ |
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unsigned int max; /* in kHz */ |
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unsigned int cur; /* in kHz, only needed if cpufreq |
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* governors are used */ |
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unsigned int suspend_freq; /* freq to set during suspend */ |
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unsigned int policy; /* see above */ |
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unsigned int last_policy; /* policy before unplug */ |
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struct cpufreq_governor *governor; /* see below */ |
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void *governor_data; |
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char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
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struct work_struct update; /* if update_policy() needs to be |
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* called, but you're in IRQ context */ |
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struct freq_constraints constraints; |
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struct freq_qos_request *min_freq_req; |
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struct freq_qos_request *max_freq_req; |
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struct cpufreq_frequency_table *freq_table; |
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enum cpufreq_table_sorting freq_table_sorted; |
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struct list_head policy_list; |
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struct kobject kobj; |
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struct completion kobj_unregister; |
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/* |
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* The rules for this semaphore: |
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* - Any routine that wants to read from the policy structure will |
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* do a down_read on this semaphore. |
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* - Any routine that will write to the policy structure and/or may take away |
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* the policy altogether (eg. CPU hotplug), will hold this lock in write |
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* mode before doing so. |
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*/ |
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struct rw_semaphore rwsem; |
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/* |
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* Fast switch flags: |
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* - fast_switch_possible should be set by the driver if it can |
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* guarantee that frequency can be changed on any CPU sharing the |
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* policy and that the change will affect all of the policy CPUs then. |
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* - fast_switch_enabled is to be set by governors that support fast |
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* frequency switching with the help of cpufreq_enable_fast_switch(). |
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*/ |
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bool fast_switch_possible; |
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bool fast_switch_enabled; |
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/* |
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* Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current |
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* governor. |
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*/ |
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bool strict_target; |
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|
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/* |
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* Preferred average time interval between consecutive invocations of |
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* the driver to set the frequency for this policy. To be set by the |
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* scaling driver (0, which is the default, means no preference). |
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*/ |
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unsigned int transition_delay_us; |
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|
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/* |
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* Remote DVFS flag (Not added to the driver structure as we don't want |
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* to access another structure from scheduler hotpath). |
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* |
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* Should be set if CPUs can do DVFS on behalf of other CPUs from |
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* different cpufreq policies. |
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*/ |
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bool dvfs_possible_from_any_cpu; |
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/* Cached frequency lookup from cpufreq_driver_resolve_freq. */ |
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unsigned int cached_target_freq; |
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unsigned int cached_resolved_idx; |
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/* Synchronization for frequency transitions */ |
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bool transition_ongoing; /* Tracks transition status */ |
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spinlock_t transition_lock; |
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wait_queue_head_t transition_wait; |
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struct task_struct *transition_task; /* Task which is doing the transition */ |
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/* cpufreq-stats */ |
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struct cpufreq_stats *stats; |
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/* For cpufreq driver's internal use */ |
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void *driver_data; |
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/* Pointer to the cooling device if used for thermal mitigation */ |
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struct thermal_cooling_device *cdev; |
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struct notifier_block nb_min; |
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struct notifier_block nb_max; |
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}; |
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/* |
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* Used for passing new cpufreq policy data to the cpufreq driver's ->verify() |
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* callback for sanitization. That callback is only expected to modify the min |
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* and max values, if necessary, and specifically it must not update the |
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* frequency table. |
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*/ |
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struct cpufreq_policy_data { |
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struct cpufreq_cpuinfo cpuinfo; |
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struct cpufreq_frequency_table *freq_table; |
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unsigned int cpu; |
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unsigned int min; /* in kHz */ |
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unsigned int max; /* in kHz */ |
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}; |
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struct cpufreq_freqs { |
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struct cpufreq_policy *policy; |
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unsigned int old; |
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unsigned int new; |
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u8 flags; /* flags of cpufreq_driver, see below. */ |
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}; |
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/* Only for ACPI */ |
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#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
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#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ |
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#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ |
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#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ |
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#ifdef CONFIG_CPU_FREQ |
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struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); |
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struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
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void cpufreq_cpu_put(struct cpufreq_policy *policy); |
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#else |
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static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) |
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{ |
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return NULL; |
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} |
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static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
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{ |
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return NULL; |
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} |
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static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } |
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#endif |
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static inline bool policy_is_inactive(struct cpufreq_policy *policy) |
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{ |
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return cpumask_empty(policy->cpus); |
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} |
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static inline bool policy_is_shared(struct cpufreq_policy *policy) |
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{ |
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return cpumask_weight(policy->cpus) > 1; |
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} |
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#ifdef CONFIG_CPU_FREQ |
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unsigned int cpufreq_get(unsigned int cpu); |
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unsigned int cpufreq_quick_get(unsigned int cpu); |
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unsigned int cpufreq_quick_get_max(unsigned int cpu); |
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unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); |
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void disable_cpufreq(void); |
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u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
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struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu); |
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void cpufreq_cpu_release(struct cpufreq_policy *policy); |
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int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
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void refresh_frequency_limits(struct cpufreq_policy *policy); |
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void cpufreq_update_policy(unsigned int cpu); |
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void cpufreq_update_limits(unsigned int cpu); |
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bool have_governor_per_policy(void); |
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bool cpufreq_supports_freq_invariance(void); |
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struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); |
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void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); |
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void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); |
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#else |
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static inline unsigned int cpufreq_get(unsigned int cpu) |
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{ |
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return 0; |
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} |
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static inline unsigned int cpufreq_quick_get(unsigned int cpu) |
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{ |
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return 0; |
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} |
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static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) |
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{ |
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return 0; |
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} |
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static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) |
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{ |
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return 0; |
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} |
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static inline bool cpufreq_supports_freq_invariance(void) |
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{ |
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return false; |
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} |
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static inline void disable_cpufreq(void) { } |
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#endif |
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#ifdef CONFIG_CPU_FREQ_STAT |
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void cpufreq_stats_create_table(struct cpufreq_policy *policy); |
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void cpufreq_stats_free_table(struct cpufreq_policy *policy); |
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void cpufreq_stats_record_transition(struct cpufreq_policy *policy, |
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unsigned int new_freq); |
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#else |
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static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } |
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static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } |
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static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, |
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unsigned int new_freq) { } |
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#endif /* CONFIG_CPU_FREQ_STAT */ |
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/********************************************************************* |
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* CPUFREQ DRIVER INTERFACE * |
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*********************************************************************/ |
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#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
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#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ |
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#define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
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struct freq_attr { |
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struct attribute attr; |
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ssize_t (*show)(struct cpufreq_policy *, char *); |
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ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); |
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}; |
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#define cpufreq_freq_attr_ro(_name) \ |
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static struct freq_attr _name = \ |
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__ATTR(_name, 0444, show_##_name, NULL) |
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#define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
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static struct freq_attr _name = \ |
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__ATTR(_name, _perm, show_##_name, NULL) |
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#define cpufreq_freq_attr_rw(_name) \ |
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static struct freq_attr _name = \ |
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__ATTR(_name, 0644, show_##_name, store_##_name) |
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#define cpufreq_freq_attr_wo(_name) \ |
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static struct freq_attr _name = \ |
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__ATTR(_name, 0200, NULL, store_##_name) |
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#define define_one_global_ro(_name) \ |
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static struct kobj_attribute _name = \ |
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__ATTR(_name, 0444, show_##_name, NULL) |
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#define define_one_global_rw(_name) \ |
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static struct kobj_attribute _name = \ |
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__ATTR(_name, 0644, show_##_name, store_##_name) |
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struct cpufreq_driver { |
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char name[CPUFREQ_NAME_LEN]; |
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u16 flags; |
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void *driver_data; |
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/* needed by all drivers */ |
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int (*init)(struct cpufreq_policy *policy); |
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int (*verify)(struct cpufreq_policy_data *policy); |
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/* define one out of two */ |
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int (*setpolicy)(struct cpufreq_policy *policy); |
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int (*target)(struct cpufreq_policy *policy, |
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unsigned int target_freq, |
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unsigned int relation); /* Deprecated */ |
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int (*target_index)(struct cpufreq_policy *policy, |
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unsigned int index); |
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unsigned int (*fast_switch)(struct cpufreq_policy *policy, |
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unsigned int target_freq); |
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/* |
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* ->fast_switch() replacement for drivers that use an internal |
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* representation of performance levels and can pass hints other than |
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* the target performance level to the hardware. |
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*/ |
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void (*adjust_perf)(unsigned int cpu, |
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unsigned long min_perf, |
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unsigned long target_perf, |
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unsigned long capacity); |
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/* |
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* Caches and returns the lowest driver-supported frequency greater than |
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* or equal to the target frequency, subject to any driver limitations. |
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* Does not set the frequency. Only to be implemented for drivers with |
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* target(). |
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*/ |
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unsigned int (*resolve_freq)(struct cpufreq_policy *policy, |
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unsigned int target_freq); |
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/* |
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* Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION |
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* unset. |
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* |
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* get_intermediate should return a stable intermediate frequency |
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* platform wants to switch to and target_intermediate() should set CPU |
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* to that frequency, before jumping to the frequency corresponding |
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* to 'index'. Core will take care of sending notifications and driver |
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* doesn't have to handle them in target_intermediate() or |
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* target_index(). |
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* |
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* Drivers can return '0' from get_intermediate() in case they don't |
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* wish to switch to intermediate frequency for some target frequency. |
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* In that case core will directly call ->target_index(). |
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*/ |
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unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
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unsigned int index); |
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int (*target_intermediate)(struct cpufreq_policy *policy, |
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unsigned int index); |
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/* should be defined, if possible */ |
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unsigned int (*get)(unsigned int cpu); |
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/* Called to update policy limits on firmware notifications. */ |
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void (*update_limits)(unsigned int cpu); |
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/* optional */ |
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int (*bios_limit)(int cpu, unsigned int *limit); |
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int (*online)(struct cpufreq_policy *policy); |
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int (*offline)(struct cpufreq_policy *policy); |
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int (*exit)(struct cpufreq_policy *policy); |
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void (*stop_cpu)(struct cpufreq_policy *policy); |
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int (*suspend)(struct cpufreq_policy *policy); |
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int (*resume)(struct cpufreq_policy *policy); |
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/* Will be called after the driver is fully initialized */ |
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void (*ready)(struct cpufreq_policy *policy); |
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struct freq_attr **attr; |
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/* platform specific boost support code */ |
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bool boost_enabled; |
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int (*set_boost)(struct cpufreq_policy *policy, int state); |
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}; |
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/* flags */ |
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/* |
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* Set by drivers that need to update internale upper and lower boundaries along |
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* with the target frequency and so the core and governors should also invoke |
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* the diver if the target frequency does not change, but the policy min or max |
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* may have changed. |
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*/ |
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#define CPUFREQ_NEED_UPDATE_LIMITS BIT(0) |
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/* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ |
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#define CPUFREQ_CONST_LOOPS BIT(1) |
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/* |
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* Set by drivers that want the core to automatically register the cpufreq |
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* driver as a thermal cooling device. |
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*/ |
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#define CPUFREQ_IS_COOLING_DEV BIT(2) |
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/* |
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* This should be set by platforms having multiple clock-domains, i.e. |
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* supporting multiple policies. With this sysfs directories of governor would |
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* be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same |
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* governor with different tunables for different clusters. |
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*/ |
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#define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) |
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/* |
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* Driver will do POSTCHANGE notifications from outside of their ->target() |
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* routine and so must set cpufreq_driver->flags with this flag, so that core |
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* can handle them specially. |
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*/ |
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#define CPUFREQ_ASYNC_NOTIFICATION BIT(4) |
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/* |
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* Set by drivers which want cpufreq core to check if CPU is running at a |
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* frequency present in freq-table exposed by the driver. For these drivers if |
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* CPU is found running at an out of table freq, we will try to set it to a freq |
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* from the table. And if that fails, we will stop further boot process by |
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* issuing a BUG_ON(). |
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*/ |
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#define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) |
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/* |
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* Set by drivers to disallow use of governors with "dynamic_switching" flag |
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* set. |
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*/ |
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#define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) |
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int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
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int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); |
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bool cpufreq_driver_test_flags(u16 flags); |
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const char *cpufreq_get_current_driver(void); |
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void *cpufreq_get_driver_data(void); |
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static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv) |
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{ |
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return IS_ENABLED(CONFIG_CPU_THERMAL) && |
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(drv->flags & CPUFREQ_IS_COOLING_DEV); |
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} |
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static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy, |
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unsigned int min, |
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unsigned int max) |
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{ |
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if (policy->min < min) |
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policy->min = min; |
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if (policy->max < min) |
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policy->max = min; |
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if (policy->min > max) |
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policy->min = max; |
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if (policy->max > max) |
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policy->max = max; |
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if (policy->min > policy->max) |
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policy->min = policy->max; |
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return; |
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} |
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static inline void |
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cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy) |
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{ |
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cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, |
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policy->cpuinfo.max_freq); |
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} |
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#ifdef CONFIG_CPU_FREQ |
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void cpufreq_suspend(void); |
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void cpufreq_resume(void); |
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int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
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#else |
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static inline void cpufreq_suspend(void) {} |
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static inline void cpufreq_resume(void) {} |
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#endif |
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/********************************************************************* |
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* CPUFREQ NOTIFIER INTERFACE * |
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*********************************************************************/ |
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#define CPUFREQ_TRANSITION_NOTIFIER (0) |
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#define CPUFREQ_POLICY_NOTIFIER (1) |
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/* Transition notifiers */ |
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#define CPUFREQ_PRECHANGE (0) |
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#define CPUFREQ_POSTCHANGE (1) |
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/* Policy Notifiers */ |
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#define CPUFREQ_CREATE_POLICY (0) |
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#define CPUFREQ_REMOVE_POLICY (1) |
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#ifdef CONFIG_CPU_FREQ |
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int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); |
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int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); |
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void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
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struct cpufreq_freqs *freqs); |
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void cpufreq_freq_transition_end(struct cpufreq_policy *policy, |
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struct cpufreq_freqs *freqs, int transition_failed); |
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|
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#else /* CONFIG_CPU_FREQ */ |
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static inline int cpufreq_register_notifier(struct notifier_block *nb, |
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unsigned int list) |
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{ |
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return 0; |
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} |
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static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
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unsigned int list) |
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{ |
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return 0; |
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} |
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#endif /* !CONFIG_CPU_FREQ */ |
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|
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/** |
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* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch |
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* safe) |
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* @old: old value |
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* @div: divisor |
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* @mult: multiplier |
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* |
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* |
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* new = old * mult / div |
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*/ |
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static inline unsigned long cpufreq_scale(unsigned long old, u_int div, |
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u_int mult) |
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{ |
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#if BITS_PER_LONG == 32 |
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u64 result = ((u64) old) * ((u64) mult); |
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do_div(result, div); |
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return (unsigned long) result; |
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|
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#elif BITS_PER_LONG == 64 |
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unsigned long result = old * ((u64) mult); |
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result /= div; |
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return result; |
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#endif |
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} |
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|
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/********************************************************************* |
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* CPUFREQ GOVERNORS * |
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*********************************************************************/ |
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|
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#define CPUFREQ_POLICY_UNKNOWN (0) |
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/* |
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* If (cpufreq_driver->target) exists, the ->governor decides what frequency |
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* within the limits is used. If (cpufreq_driver->setpolicy> exists, these |
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* two generic policies are available: |
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*/ |
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#define CPUFREQ_POLICY_POWERSAVE (1) |
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#define CPUFREQ_POLICY_PERFORMANCE (2) |
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|
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/* |
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* The polling frequency depends on the capability of the processor. Default |
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* polling frequency is 1000 times the transition latency of the processor. The |
|
* ondemand governor will work on any processor with transition latency <= 10ms, |
|
* using appropriate sampling rate. |
|
*/ |
|
#define LATENCY_MULTIPLIER (1000) |
|
|
|
struct cpufreq_governor { |
|
char name[CPUFREQ_NAME_LEN]; |
|
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); |
|
struct list_head governor_list; |
|
struct module *owner; |
|
u8 flags; |
|
}; |
|
|
|
/* 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); |
|
int __cpufreq_driver_target(struct cpufreq_policy *policy, |
|
unsigned int target_freq, |
|
unsigned int relation); |
|
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); |
|
|
|
static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) |
|
{ |
|
if (policy->max < policy->cur) |
|
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); |
|
else if (policy->min > policy->cur) |
|
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); |
|
} |
|
|
|
/* 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; |
|
|
|
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); |
|
}; |
|
|
|
/********************************************************************* |
|
* FREQUENCY TABLE HELPERS * |
|
*********************************************************************/ |
|
|
|
/* 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) |
|
|
|
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 */ |
|
}; |
|
|
|
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
|
int dev_pm_opp_init_cpufreq_table(struct device *dev, |
|
struct cpufreq_frequency_table **table); |
|
void dev_pm_opp_free_cpufreq_table(struct device *dev, |
|
struct cpufreq_frequency_table **table); |
|
#else |
|
static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, |
|
struct cpufreq_frequency_table |
|
**table) |
|
{ |
|
return -EINVAL; |
|
} |
|
|
|
static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, |
|
struct cpufreq_frequency_table |
|
**table) |
|
{ |
|
} |
|
#endif |
|
|
|
/* |
|
* 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. |
|
*/ |
|
|
|
#define cpufreq_for_each_entry(pos, table) \ |
|
for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) |
|
|
|
/* |
|
* 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 |
|
*/ |
|
|
|
#define cpufreq_for_each_entry_idx(pos, table, idx) \ |
|
for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ |
|
pos++, idx++) |
|
|
|
/* |
|
* 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. |
|
*/ |
|
|
|
#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_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_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
|
struct cpufreq_frequency_table *table); |
|
|
|
int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy, |
|
struct cpufreq_frequency_table *table); |
|
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 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 |
|
int cpufreq_boost_trigger_state(int state); |
|
int cpufreq_boost_enabled(void); |
|
int cpufreq_enable_boost_support(void); |
|
bool policy_has_boost_freq(struct cpufreq_policy *policy); |
|
|
|
/* 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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
freq = pos->frequency; |
|
|
|
if (freq >= target_freq) |
|
return idx; |
|
|
|
best = idx; |
|
} |
|
|
|
return best; |
|
} |
|
|
|
/* 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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
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; |
|
|
|
return best; |
|
} |
|
|
|
return best; |
|
} |
|
|
|
/* Works only on sorted freq-tables */ |
|
static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, |
|
unsigned int target_freq) |
|
{ |
|
target_freq = clamp_val(target_freq, policy->min, policy->max); |
|
|
|
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) |
|
return cpufreq_table_find_index_al(policy, target_freq); |
|
else |
|
return cpufreq_table_find_index_dl(policy, target_freq); |
|
} |
|
|
|
/* 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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
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; |
|
} |
|
|
|
/* 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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
freq = pos->frequency; |
|
|
|
if (freq <= target_freq) |
|
return idx; |
|
|
|
best = idx; |
|
} |
|
|
|
return best; |
|
} |
|
|
|
/* Works only on sorted freq-tables */ |
|
static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, |
|
unsigned int target_freq) |
|
{ |
|
target_freq = clamp_val(target_freq, policy->min, policy->max); |
|
|
|
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) |
|
return cpufreq_table_find_index_ah(policy, target_freq); |
|
else |
|
return cpufreq_table_find_index_dh(policy, target_freq); |
|
} |
|
|
|
/* 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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
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) |
|
{ |
|
struct cpufreq_frequency_table *table = policy->freq_table; |
|
struct cpufreq_frequency_table *pos; |
|
unsigned int freq; |
|
int idx, best = -1; |
|
|
|
cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
|
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; |
|
} |
|
|
|
/* Works only on sorted freq-tables */ |
|
static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, |
|
unsigned int target_freq) |
|
{ |
|
target_freq = clamp_val(target_freq, policy->min, policy->max); |
|
|
|
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) |
|
return cpufreq_table_find_index_ac(policy, target_freq); |
|
else |
|
return cpufreq_table_find_index_dc(policy, target_freq); |
|
} |
|
|
|
static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, |
|
unsigned int target_freq, |
|
unsigned int relation) |
|
{ |
|
if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) |
|
return cpufreq_table_index_unsorted(policy, target_freq, |
|
relation); |
|
|
|
switch (relation) { |
|
case CPUFREQ_RELATION_L: |
|
return cpufreq_table_find_index_l(policy, target_freq); |
|
case CPUFREQ_RELATION_H: |
|
return cpufreq_table_find_index_h(policy, target_freq); |
|
case CPUFREQ_RELATION_C: |
|
return cpufreq_table_find_index_c(policy, target_freq); |
|
default: |
|
WARN_ON_ONCE(1); |
|
return 0; |
|
} |
|
} |
|
|
|
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; |
|
} |
|
#else |
|
static inline int cpufreq_boost_trigger_state(int state) |
|
{ |
|
return 0; |
|
} |
|
static inline int cpufreq_boost_enabled(void) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline int cpufreq_enable_boost_support(void) |
|
{ |
|
return -EINVAL; |
|
} |
|
|
|
static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) |
|
{ |
|
return false; |
|
} |
|
#endif |
|
|
|
#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
|
void sched_cpufreq_governor_change(struct cpufreq_policy *policy, |
|
struct cpufreq_governor *old_gov); |
|
#else |
|
static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy, |
|
struct cpufreq_governor *old_gov) { } |
|
#endif |
|
|
|
extern void arch_freq_prepare_all(void); |
|
extern unsigned 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; |
|
extern struct freq_attr *cpufreq_generic_attr[]; |
|
int cpufreq_table_validate_and_sort(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); |
|
#endif /* _LINUX_CPUFREQ_H */
|
|
|