mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:46:40 +07:00
335dc3335f
Before: $ scripts/checkpatch.pl --file --terse include/linux/cpufreq.h total: 14 errors, 11 warnings, 419 lines checked After: $ scripts/checkpatch.pl --file --terse include/linux/cpufreq.h total: 2 errors, 4 warnings, 422 lines checked Signed-off-by: Thiago Farina <tfransosi@gmail.com> Signed-off-by: Dave Jones <davej@redhat.com>
404 lines
12 KiB
C
404 lines
12 KiB
C
/*
|
|
* linux/include/linux/cpufreq.h
|
|
*
|
|
* Copyright (C) 2001 Russell King
|
|
* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef _LINUX_CPUFREQ_H
|
|
#define _LINUX_CPUFREQ_H
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kobject.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/cpumask.h>
|
|
#include <asm/div64.h>
|
|
|
|
#define CPUFREQ_NAME_LEN 16
|
|
|
|
|
|
/*********************************************************************
|
|
* CPUFREQ NOTIFIER INTERFACE *
|
|
*********************************************************************/
|
|
|
|
#define CPUFREQ_TRANSITION_NOTIFIER (0)
|
|
#define CPUFREQ_POLICY_NOTIFIER (1)
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
|
|
int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
|
|
#else /* CONFIG_CPU_FREQ */
|
|
static inline int cpufreq_register_notifier(struct notifier_block *nb,
|
|
unsigned int list)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
|
|
unsigned int list)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_CPU_FREQ */
|
|
|
|
/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
|
|
* within the limits is used. If (cpufreq_driver->setpolicy> exists, these
|
|
* two generic policies are available:
|
|
*/
|
|
|
|
#define CPUFREQ_POLICY_POWERSAVE (1)
|
|
#define CPUFREQ_POLICY_PERFORMANCE (2)
|
|
|
|
/* Frequency values here are CPU kHz so that hardware which doesn't run
|
|
* with some frequencies can complain without having to guess what per
|
|
* cent / per mille means.
|
|
* Maximum transition latency is in nanoseconds - if it's unknown,
|
|
* CPUFREQ_ETERNAL shall be used.
|
|
*/
|
|
|
|
struct cpufreq_governor;
|
|
|
|
/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
|
|
extern struct kobject *cpufreq_global_kobject;
|
|
|
|
#define CPUFREQ_ETERNAL (-1)
|
|
struct cpufreq_cpuinfo {
|
|
unsigned int max_freq;
|
|
unsigned int min_freq;
|
|
|
|
/* in 10^(-9) s = nanoseconds */
|
|
unsigned int transition_latency;
|
|
};
|
|
|
|
struct cpufreq_real_policy {
|
|
unsigned int min; /* in kHz */
|
|
unsigned int max; /* in kHz */
|
|
unsigned int policy; /* see above */
|
|
struct cpufreq_governor *governor; /* see below */
|
|
};
|
|
|
|
struct cpufreq_policy {
|
|
cpumask_var_t cpus; /* CPUs requiring sw coordination */
|
|
cpumask_var_t related_cpus; /* CPUs with any coordination */
|
|
unsigned int shared_type; /* ANY or ALL affected CPUs
|
|
should set cpufreq */
|
|
unsigned int cpu; /* cpu nr of registered CPU */
|
|
struct cpufreq_cpuinfo cpuinfo;/* see above */
|
|
|
|
unsigned int min; /* in kHz */
|
|
unsigned int max; /* in kHz */
|
|
unsigned int cur; /* in kHz, only needed if cpufreq
|
|
* governors are used */
|
|
unsigned int policy; /* see above */
|
|
struct cpufreq_governor *governor; /* see below */
|
|
|
|
struct work_struct update; /* if update_policy() needs to be
|
|
* called, but you're in IRQ context */
|
|
|
|
struct cpufreq_real_policy user_policy;
|
|
|
|
struct kobject kobj;
|
|
struct completion kobj_unregister;
|
|
};
|
|
|
|
#define CPUFREQ_ADJUST (0)
|
|
#define CPUFREQ_INCOMPATIBLE (1)
|
|
#define CPUFREQ_NOTIFY (2)
|
|
#define CPUFREQ_START (3)
|
|
|
|
#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
|
|
#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
|
|
#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
|
|
#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
|
|
|
|
/******************** cpufreq transition notifiers *******************/
|
|
|
|
#define CPUFREQ_PRECHANGE (0)
|
|
#define CPUFREQ_POSTCHANGE (1)
|
|
#define CPUFREQ_RESUMECHANGE (8)
|
|
#define CPUFREQ_SUSPENDCHANGE (9)
|
|
|
|
struct cpufreq_freqs {
|
|
unsigned int cpu; /* cpu nr */
|
|
unsigned int old;
|
|
unsigned int new;
|
|
u8 flags; /* flags of cpufreq_driver, see below. */
|
|
};
|
|
|
|
|
|
/**
|
|
* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch safe)
|
|
* @old: old value
|
|
* @div: divisor
|
|
* @mult: multiplier
|
|
*
|
|
*
|
|
* new = old * mult / div
|
|
*/
|
|
static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult)
|
|
{
|
|
#if BITS_PER_LONG == 32
|
|
|
|
u64 result = ((u64) old) * ((u64) mult);
|
|
do_div(result, div);
|
|
return (unsigned long) result;
|
|
|
|
#elif BITS_PER_LONG == 64
|
|
|
|
unsigned long result = old * ((u64) mult);
|
|
result /= div;
|
|
return result;
|
|
|
|
#endif
|
|
};
|
|
|
|
/*********************************************************************
|
|
* CPUFREQ GOVERNORS *
|
|
*********************************************************************/
|
|
|
|
#define CPUFREQ_GOV_START 1
|
|
#define CPUFREQ_GOV_STOP 2
|
|
#define CPUFREQ_GOV_LIMITS 3
|
|
|
|
struct cpufreq_governor {
|
|
char name[CPUFREQ_NAME_LEN];
|
|
int (*governor) (struct cpufreq_policy *policy,
|
|
unsigned int event);
|
|
ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
|
|
char *buf);
|
|
int (*store_setspeed) (struct cpufreq_policy *policy,
|
|
unsigned int freq);
|
|
unsigned int max_transition_latency; /* HW must be able to switch to
|
|
next freq faster than this value in nano secs or we
|
|
will fallback to performance governor */
|
|
struct list_head governor_list;
|
|
struct module *owner;
|
|
};
|
|
|
|
/*
|
|
* Pass a target to the cpufreq driver.
|
|
*/
|
|
extern int cpufreq_driver_target(struct cpufreq_policy *policy,
|
|
unsigned int target_freq,
|
|
unsigned int relation);
|
|
extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
|
|
unsigned int target_freq,
|
|
unsigned int relation);
|
|
|
|
|
|
extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy,
|
|
unsigned int cpu);
|
|
|
|
int cpufreq_register_governor(struct cpufreq_governor *governor);
|
|
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
|
|
|
|
|
|
/*********************************************************************
|
|
* CPUFREQ DRIVER INTERFACE *
|
|
*********************************************************************/
|
|
|
|
#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
|
|
#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
|
|
|
|
struct freq_attr;
|
|
|
|
struct cpufreq_driver {
|
|
struct module *owner;
|
|
char name[CPUFREQ_NAME_LEN];
|
|
u8 flags;
|
|
|
|
/* needed by all drivers */
|
|
int (*init) (struct cpufreq_policy *policy);
|
|
int (*verify) (struct cpufreq_policy *policy);
|
|
|
|
/* define one out of two */
|
|
int (*setpolicy) (struct cpufreq_policy *policy);
|
|
int (*target) (struct cpufreq_policy *policy,
|
|
unsigned int target_freq,
|
|
unsigned int relation);
|
|
|
|
/* should be defined, if possible */
|
|
unsigned int (*get) (unsigned int cpu);
|
|
|
|
/* optional */
|
|
unsigned int (*getavg) (struct cpufreq_policy *policy,
|
|
unsigned int cpu);
|
|
int (*bios_limit) (int cpu, unsigned int *limit);
|
|
|
|
int (*exit) (struct cpufreq_policy *policy);
|
|
int (*suspend) (struct cpufreq_policy *policy);
|
|
int (*resume) (struct cpufreq_policy *policy);
|
|
struct freq_attr **attr;
|
|
};
|
|
|
|
/* flags */
|
|
|
|
#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
|
|
* all ->init() calls failed */
|
|
#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel
|
|
* "constants" aren't affected by
|
|
* frequency transitions */
|
|
#define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed
|
|
* mismatches */
|
|
|
|
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
|
|
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
|
|
|
|
|
|
void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state);
|
|
|
|
|
|
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max)
|
|
{
|
|
if (policy->min < min)
|
|
policy->min = min;
|
|
if (policy->max < min)
|
|
policy->max = min;
|
|
if (policy->min > max)
|
|
policy->min = max;
|
|
if (policy->max > max)
|
|
policy->max = max;
|
|
if (policy->min > policy->max)
|
|
policy->min = policy->max;
|
|
return;
|
|
}
|
|
|
|
struct freq_attr {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct cpufreq_policy *, char *);
|
|
ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
|
|
};
|
|
|
|
#define cpufreq_freq_attr_ro(_name) \
|
|
static struct freq_attr _name = \
|
|
__ATTR(_name, 0444, show_##_name, NULL)
|
|
|
|
#define cpufreq_freq_attr_ro_perm(_name, _perm) \
|
|
static struct freq_attr _name = \
|
|
__ATTR(_name, _perm, show_##_name, NULL)
|
|
|
|
#define cpufreq_freq_attr_rw(_name) \
|
|
static struct freq_attr _name = \
|
|
__ATTR(_name, 0644, show_##_name, store_##_name)
|
|
|
|
struct global_attr {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct kobject *kobj,
|
|
struct attribute *attr, char *buf);
|
|
ssize_t (*store)(struct kobject *a, struct attribute *b,
|
|
const char *c, size_t count);
|
|
};
|
|
|
|
#define define_one_global_ro(_name) \
|
|
static struct global_attr _name = \
|
|
__ATTR(_name, 0444, show_##_name, NULL)
|
|
|
|
#define define_one_global_rw(_name) \
|
|
static struct global_attr _name = \
|
|
__ATTR(_name, 0644, show_##_name, store_##_name)
|
|
|
|
|
|
/*********************************************************************
|
|
* CPUFREQ 2.6. INTERFACE *
|
|
*********************************************************************/
|
|
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
|
|
int cpufreq_update_policy(unsigned int cpu);
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
|
|
unsigned int cpufreq_get(unsigned int cpu);
|
|
#else
|
|
static inline unsigned int cpufreq_get(unsigned int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
|
|
#ifdef CONFIG_CPU_FREQ
|
|
unsigned int cpufreq_quick_get(unsigned int cpu);
|
|
#else
|
|
static inline unsigned int cpufreq_quick_get(unsigned int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*********************************************************************
|
|
* CPUFREQ DEFAULT GOVERNOR *
|
|
*********************************************************************/
|
|
|
|
|
|
/*
|
|
Performance governor is fallback governor if any other gov failed to
|
|
auto load due latency restrictions
|
|
*/
|
|
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
|
|
extern struct cpufreq_governor cpufreq_gov_performance;
|
|
#endif
|
|
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
|
|
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
|
|
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE)
|
|
extern struct cpufreq_governor cpufreq_gov_powersave;
|
|
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave)
|
|
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
|
|
extern struct cpufreq_governor cpufreq_gov_userspace;
|
|
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace)
|
|
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
|
|
extern struct cpufreq_governor cpufreq_gov_ondemand;
|
|
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand)
|
|
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
|
|
extern struct cpufreq_governor cpufreq_gov_conservative;
|
|
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
|
|
#endif
|
|
|
|
|
|
/*********************************************************************
|
|
* FREQUENCY TABLE HELPERS *
|
|
*********************************************************************/
|
|
|
|
#define CPUFREQ_ENTRY_INVALID ~0
|
|
#define CPUFREQ_TABLE_END ~1
|
|
|
|
struct cpufreq_frequency_table {
|
|
unsigned int index; /* any */
|
|
unsigned int frequency; /* kHz - doesn't need to be in ascending
|
|
* order */
|
|
};
|
|
|
|
int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
|
|
struct cpufreq_frequency_table *table);
|
|
|
|
int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
|
|
struct cpufreq_frequency_table *table);
|
|
|
|
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
|
|
struct cpufreq_frequency_table *table,
|
|
unsigned int target_freq,
|
|
unsigned int relation,
|
|
unsigned int *index);
|
|
|
|
/* the following 3 funtions are for cpufreq core use only */
|
|
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
|
|
struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
|
|
void cpufreq_cpu_put(struct cpufreq_policy *data);
|
|
|
|
/* 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_put_attr(unsigned int cpu);
|
|
|
|
|
|
#endif /* _LINUX_CPUFREQ_H */
|