cpufreq: Re-arrange declarations in cpufreq.h
They are pretty much mixed up. Although generic headers are present, definitions/declarations are present outside of them too ... This patch just moves stuff up and down to make it look better and consistent. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
Rafael J. Wysocki
Родитель
5ff0a26803
Коммит
74aca95da7
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@ -17,60 +17,30 @@
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#include <linux/notifier.h>
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#include <linux/sysfs.h>
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#define CPUFREQ_NAME_LEN 16
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/* Print length for names. Extra 1 space for accomodating '\n' in prints */
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#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
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/*********************************************************************
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* CPUFREQ NOTIFIER INTERFACE *
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* CPUFREQ 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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#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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extern void disable_cpufreq(void);
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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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static inline void disable_cpufreq(void) { }
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#endif /* CONFIG_CPU_FREQ */
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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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/* Frequency values here are CPU kHz so that hardware which doesn't run
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* with some frequencies can complain without having to guess what per
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* cent / per mille means.
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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 accomodating '\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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/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
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extern struct kobject *cpufreq_global_kobject;
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int cpufreq_get_global_kobject(void);
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void cpufreq_put_global_kobject(void);
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int cpufreq_sysfs_create_file(const struct attribute *attr);
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void cpufreq_sysfs_remove_file(const struct attribute *attr);
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struct cpufreq_freqs {
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unsigned int cpu; /* cpu nr */
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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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#define CPUFREQ_ETERNAL (-1)
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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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@ -117,102 +87,53 @@ struct cpufreq_policy {
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int transition_ongoing; /* Tracks transition status */
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};
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#define CPUFREQ_ADJUST (0)
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#define CPUFREQ_INCOMPATIBLE (1)
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#define CPUFREQ_NOTIFY (2)
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#define CPUFREQ_START (3)
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#define CPUFREQ_UPDATE_POLICY_CPU (4)
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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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struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
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void cpufreq_cpu_put(struct cpufreq_policy *data);
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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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/******************** cpufreq transition notifiers *******************/
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/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
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extern struct kobject *cpufreq_global_kobject;
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int cpufreq_get_global_kobject(void);
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void cpufreq_put_global_kobject(void);
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int cpufreq_sysfs_create_file(const struct attribute *attr);
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void cpufreq_sysfs_remove_file(const struct attribute *attr);
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#define CPUFREQ_PRECHANGE (0)
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#define CPUFREQ_POSTCHANGE (1)
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#define CPUFREQ_RESUMECHANGE (8)
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#define CPUFREQ_SUSPENDCHANGE (9)
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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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void disable_cpufreq(void);
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struct cpufreq_freqs {
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unsigned int cpu; /* cpu nr */
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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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/**
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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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u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
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int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
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int cpufreq_update_policy(unsigned int cpu);
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bool have_governor_per_policy(void);
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struct kobject *get_governor_parent_kobj(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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#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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#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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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 void disable_cpufreq(void) { }
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#endif
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};
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/*********************************************************************
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* CPUFREQ GOVERNORS *
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*********************************************************************/
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#define CPUFREQ_GOV_START 1
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#define CPUFREQ_GOV_STOP 2
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#define CPUFREQ_GOV_LIMITS 3
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#define CPUFREQ_GOV_POLICY_INIT 4
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#define CPUFREQ_GOV_POLICY_EXIT 5
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struct cpufreq_governor {
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char name[CPUFREQ_NAME_LEN];
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int initialized;
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int (*governor) (struct cpufreq_policy *policy,
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unsigned int event);
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ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
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char *buf);
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int (*store_setspeed) (struct cpufreq_policy *policy,
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unsigned int freq);
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unsigned int max_transition_latency; /* HW must be able to switch to
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next freq faster than this value in nano secs or we
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will fallback to performance governor */
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struct list_head governor_list;
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struct module *owner;
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};
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/*
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* Pass a target to the cpufreq driver.
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*/
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extern int cpufreq_driver_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation);
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extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation);
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int cpufreq_register_governor(struct cpufreq_governor *governor);
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void cpufreq_unregister_governor(struct cpufreq_governor *governor);
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/*********************************************************************
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* CPUFREQ DRIVER INTERFACE *
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@ -221,7 +142,40 @@ void cpufreq_unregister_governor(struct cpufreq_governor *governor);
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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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struct freq_attr;
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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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struct global_attr {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobj,
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struct attribute *attr, char *buf);
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ssize_t (*store)(struct kobject *a, struct attribute *b,
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const char *c, size_t count);
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};
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#define define_one_global_ro(_name) \
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static struct global_attr _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 global_attr _name = \
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__ATTR(_name, 0644, show_##_name, store_##_name)
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struct cpufreq_driver {
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struct module *owner;
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@ -258,7 +212,6 @@ struct cpufreq_driver {
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};
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/* flags */
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#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
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* all ->init() calls failed */
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#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel
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@ -270,8 +223,7 @@ struct cpufreq_driver {
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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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void cpufreq_notify_transition(struct cpufreq_policy *policy,
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struct cpufreq_freqs *freqs, unsigned int state);
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const char *cpufreq_get_current_driver(void);
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static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
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unsigned int min, unsigned int max)
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@ -289,86 +241,117 @@ static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
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return;
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}
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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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struct global_attr {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobj,
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struct attribute *attr, char *buf);
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ssize_t (*store)(struct kobject *a, struct attribute *b,
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const char *c, size_t count);
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};
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#define define_one_global_ro(_name) \
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static struct global_attr _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 global_attr _name = \
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__ATTR(_name, 0644, show_##_name, store_##_name)
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struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
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void cpufreq_cpu_put(struct cpufreq_policy *data);
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const char *cpufreq_get_current_driver(void);
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/*********************************************************************
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* CPUFREQ 2.6. INTERFACE *
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*********************************************************************/
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u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
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int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
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int cpufreq_update_policy(unsigned int cpu);
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bool have_governor_per_policy(void);
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struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
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#ifdef CONFIG_CPU_FREQ
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/*
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* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it
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*/
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unsigned int cpufreq_get(unsigned int cpu);
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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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#endif
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/*
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* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
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*/
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#ifdef CONFIG_CPU_FREQ
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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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#else
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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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#endif
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/*********************************************************************
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* CPUFREQ DEFAULT GOVERNOR *
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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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#define CPUFREQ_RESUMECHANGE (8)
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#define CPUFREQ_SUSPENDCHANGE (9)
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/* Policy Notifiers */
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#define CPUFREQ_ADJUST (0)
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#define CPUFREQ_INCOMPATIBLE (1)
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#define CPUFREQ_NOTIFY (2)
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#define CPUFREQ_START (3)
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#define CPUFREQ_UPDATE_POLICY_CPU (4)
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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_notify_transition(struct cpufreq_policy *policy,
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struct cpufreq_freqs *freqs, unsigned int state);
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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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* 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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#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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* CPUFREQ GOVERNORS *
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*********************************************************************/
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/*
|
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* 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:
|
||||
*/
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#define CPUFREQ_POLICY_POWERSAVE (1)
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#define CPUFREQ_POLICY_PERFORMANCE (2)
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/* Governor Events */
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#define CPUFREQ_GOV_START 1
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#define CPUFREQ_GOV_STOP 2
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#define CPUFREQ_GOV_LIMITS 3
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#define CPUFREQ_GOV_POLICY_INIT 4
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#define CPUFREQ_GOV_POLICY_EXIT 5
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struct cpufreq_governor {
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char name[CPUFREQ_NAME_LEN];
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int initialized;
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int (*governor) (struct cpufreq_policy *policy,
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unsigned int event);
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ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
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char *buf);
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int (*store_setspeed) (struct cpufreq_policy *policy,
|
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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;
|
||||
};
|
||||
|
||||
/* Pass a target to the cpufreq driver */
|
||||
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);
|
||||
int cpufreq_register_governor(struct cpufreq_governor *governor);
|
||||
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
|
||||
|
||||
/* CPUFREQ DEFAULT GOVERNOR */
|
||||
/*
|
||||
* Performance governor is fallback governor if any other gov failed to auto
|
||||
* load due latency restrictions
|
||||
|
|
@ -417,18 +400,16 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
|
|||
unsigned int relation,
|
||||
unsigned int *index);
|
||||
|
||||
/* the following 3 funtions are for cpufreq core use only */
|
||||
void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
|
||||
ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
|
||||
|
||||
/* the following funtion is for cpufreq core use only */
|
||||
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
|
||||
|
||||
/* the following are really really optional */
|
||||
extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
|
||||
|
||||
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);
|
||||
|
||||
void cpufreq_frequency_table_put_attr(unsigned int cpu);
|
||||
|
||||
ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
|
||||
|
||||
#endif /* _LINUX_CPUFREQ_H */
|
||||
|
|
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