[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / cpufreq / cpufreq_governor.h

/*
 * drivers/cpufreq/cpufreq_governor.h
 *
 * Header file for CPUFreq governors common code
 *
 * Copyright	(C) 2001 Russell King
 *		(C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.
 *		(C) 2003 Jun Nakajima <jun.nakajima@intel.com>
 *		(C) 2009 Alexander Clouter <alex@digriz.org.uk>
 *		(c) 2012 Viresh Kumar <viresh.kumar@linaro.org>
 *
 * 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 _CPUFREQ_GOVERNOR_H
#define _CPUFREQ_GOVERNOR_H

#include <linux/cpufreq.h>
#include <linux/kobject.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/sysfs.h>

/*
 * The polling frequency depends on the capability of the processor. Default
 * polling frequency is 1000 times the transition latency of the processor. The
 * governor will work on any processor with transition latency <= 10mS, using
 * appropriate sampling rate.
 *
 * For CPUs with transition latency > 10mS (mostly drivers with CPUFREQ_ETERNAL)
 * this governor will not work. All times here are in uS.
 */
#define MIN_SAMPLING_RATE_RATIO			(2)
#define LATENCY_MULTIPLIER			(1000)
#define MIN_LATENCY_MULTIPLIER			(20)
#define TRANSITION_LATENCY_LIMIT		(10 * 1000 * 1000)

/* Ondemand Sampling types */
enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE};

/* Hotplug Sampling types */
enum {HP_NORMAL_SAMPLE, HP_SUB_SAMPLE};

/*
 * Macro for creating governors sysfs routines
 *
 * - gov_sys: One governor instance per whole system
 * - gov_pol: One governor instance per policy
 */

/* Create attributes */
#define gov_sys_attr_ro(_name)						\
static struct global_attr _name##_gov_sys =				\
__ATTR(_name, 0444, show_##_name##_gov_sys, NULL)

#define gov_sys_attr_rw(_name)						\
static struct global_attr _name##_gov_sys =				\
__ATTR(_name, 0644, show_##_name##_gov_sys, store_##_name##_gov_sys)

#define gov_pol_attr_ro(_name)						\
static struct freq_attr _name##_gov_pol =				\
__ATTR(_name, 0444, show_##_name##_gov_pol, NULL)

#define gov_pol_attr_rw(_name)						\
static struct freq_attr _name##_gov_pol =				\
__ATTR(_name, 0644, show_##_name##_gov_pol, store_##_name##_gov_pol)

#define gov_sys_pol_attr_rw(_name)					\
	gov_sys_attr_rw(_name);						\
	gov_pol_attr_rw(_name)

#define gov_sys_pol_attr_ro(_name)					\
	gov_sys_attr_ro(_name);						\
	gov_pol_attr_ro(_name)

/* Create show/store routines */
#define show_one(_gov, file_name)					\
static ssize_t show_##file_name##_gov_sys				\
(struct kobject *kobj, struct attribute *attr, char *buf)		\
{									\
	struct _gov##_dbs_tuners *tuners = _gov##_dbs_cdata.gdbs_data->tuners; \
	return sprintf(buf, "%u\n", tuners->file_name);			\
}									\
									\
static ssize_t show_##file_name##_gov_pol					\
(struct cpufreq_policy *policy, char *buf)				\
{									\
	struct dbs_data *dbs_data = policy->governor_data;		\
	struct _gov##_dbs_tuners *tuners = dbs_data->tuners;		\
	return sprintf(buf, "%u\n", tuners->file_name);			\
}

#define store_one(_gov, file_name)					\
static ssize_t store_##file_name##_gov_sys				\
(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count)	\
{									\
	struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data;		\
	return store_##file_name(dbs_data, buf, count);			\
}									\
									\
static ssize_t store_##file_name##_gov_pol				\
(struct cpufreq_policy *policy, const char *buf, size_t count)		\
{									\
	struct dbs_data *dbs_data = policy->governor_data;		\
	return store_##file_name(dbs_data, buf, count);			\
}

#define show_store_one(_gov, file_name)					\
show_one(_gov, file_name);						\
store_one(_gov, file_name)

/* create helper routines */
#define define_get_cpu_dbs_routines(_dbs_info)				\
static struct cpu_dbs_common_info *get_cpu_cdbs(int cpu)		\
{									\
	return &per_cpu(_dbs_info, cpu).cdbs;				\
}									\
									\
static void *get_cpu_dbs_info_s(int cpu)				\
{									\
	return &per_cpu(_dbs_info, cpu);				\
}

/*
 * Abbreviations:
 * dbs: used as a shortform for demand based switching It helps to keep variable
 *	names smaller, simpler
 * cdbs: common dbs
 * od_*: On-demand governor
 * cs_*: Conservative governor
 * hp_*: Hotplug governor
 */

/* Per cpu structures */
struct cpu_dbs_common_info {
	int cpu;
	u64 prev_cpu_idle;
	u64 prev_cpu_wall;
	u64 prev_cpu_nice;
	struct cpufreq_policy *cur_policy;
	struct delayed_work work;
	/*
	 * percpu mutex that serializes governor limit change with gov_dbs_timer
	 * invocation. We do not want gov_dbs_timer to run when user is changing
	 * the governor or limits.
	 */
	struct mutex timer_mutex;
	ktime_t time_stamp;
};

struct od_cpu_dbs_info_s {
	struct cpu_dbs_common_info cdbs;
	struct cpufreq_frequency_table *freq_table;
	unsigned int freq_lo;
	unsigned int freq_lo_jiffies;
	unsigned int freq_hi_jiffies;
	unsigned int rate_mult;
	unsigned int sample_type:1;
};

struct cs_cpu_dbs_info_s {
	struct cpu_dbs_common_info cdbs;
	unsigned int down_skip;
	unsigned int requested_freq;
	unsigned int enable:1;
};

struct hp_cpu_dbs_info_s {
	struct cpu_dbs_common_info cdbs;
	struct cpufreq_frequency_table *freq_table;
	unsigned int freq_lo;
	unsigned int freq_lo_jiffies;
	unsigned int freq_hi_jiffies;
	unsigned int rate_mult;
	unsigned int sample_type:1;
};

/* Per policy Governers sysfs tunables */
struct od_dbs_tuners {
	unsigned int ignore_nice_load;
	unsigned int sampling_rate;
	unsigned int sampling_down_factor;
	unsigned int up_threshold;
	unsigned int powersave_bias;
	unsigned int io_is_busy;
};

struct cs_dbs_tuners {
	unsigned int ignore_nice_load;
	unsigned int sampling_rate;
	unsigned int sampling_down_factor;
	unsigned int up_threshold;
	unsigned int down_threshold;
	unsigned int freq_step;
};

struct hp_dbs_tuners {
	unsigned int ignore_nice_load;
	unsigned int sampling_rate;
	unsigned int sampling_down_factor;
	unsigned int up_threshold;
	unsigned int adj_up_threshold;
	unsigned int powersave_bias;
	unsigned int io_is_busy;
// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        unsigned int down_differential;
	unsigned int cpu_up_threshold;
	unsigned int cpu_down_differential;
	unsigned int cpu_up_avg_times;
	unsigned int cpu_down_avg_times;
	unsigned int cpu_num_limit;
	unsigned int cpu_num_base;
	unsigned int is_cpu_hotplug_disable;
	unsigned int cpu_input_boost_enable;
	unsigned int cpu_input_boost_num;
	unsigned int cpu_rush_boost_enable;
	unsigned int cpu_rush_boost_num;
	unsigned int cpu_rush_threshold;
	unsigned int cpu_rush_tlp_times;
	unsigned int cpu_rush_avg_times;
// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
};

/* Common Governer data across policies */
struct dbs_data;
struct common_dbs_data {
	/* Common across governors */
	#define GOV_ONDEMAND		0
	#define GOV_CONSERVATIVE	1
        #define GOV_HOTPLUG		2
	int governor;
	struct attribute_group *attr_group_gov_sys; /* one governor - system */
	struct attribute_group *attr_group_gov_pol; /* one governor - policy */

	/* Common data for platforms that don't set have_governor_per_policy */
	struct dbs_data *gdbs_data;

	struct cpu_dbs_common_info *(*get_cpu_cdbs)(int cpu);
	void *(*get_cpu_dbs_info_s)(int cpu);
	void (*gov_dbs_timer)(struct work_struct *work);
	void (*gov_check_cpu)(int cpu, unsigned int load);
	int (*init)(struct dbs_data *dbs_data);
	void (*exit)(struct dbs_data *dbs_data);

	/* Governor specific ops, see below */
	void *gov_ops;
};

/* Governer Per policy data */
struct dbs_data {
	struct common_dbs_data *cdata;
	unsigned int min_sampling_rate;
	int usage_count;
	void *tuners;

	/* dbs_mutex protects dbs_enable in governor start/stop */
	struct mutex mutex;
};

/* Governor specific ops, will be passed to dbs_data->gov_ops */
struct od_ops {
	void (*powersave_bias_init_cpu)(int cpu);
	unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy,
			unsigned int freq_next, unsigned int relation);
	void (*freq_increase)(struct cpufreq_policy *p, unsigned int freq);
};

struct cs_ops {
	struct notifier_block *notifier_block;
};

struct hp_ops {
	void (*powersave_bias_init_cpu)(int cpu);
	unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy,
			unsigned int freq_next, unsigned int relation);
	void (*freq_increase)(struct cpufreq_policy *p, unsigned int freq);
	struct input_handler *input_handler; // <-XXX
};

static inline int delay_for_sampling_rate(unsigned int sampling_rate)
{
	int delay = usecs_to_jiffies(sampling_rate);

	/* We want all CPUs to do sampling nearly on same jiffy */
	if (num_online_cpus() > 1)
		delay -= jiffies % delay;

	return delay;
}

#define declare_show_sampling_rate_min(_gov)				\
static ssize_t show_sampling_rate_min_gov_sys				\
(struct kobject *kobj, struct attribute *attr, char *buf)		\
{									\
	struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data;		\
	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate);	\
}									\
									\
static ssize_t show_sampling_rate_min_gov_pol				\
(struct cpufreq_policy *policy, char *buf)				\
{									\
	struct dbs_data *dbs_data = policy->governor_data;		\
	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate);	\
}

void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
bool need_load_eval(struct cpu_dbs_common_info *cdbs,
		unsigned int sampling_rate);
int cpufreq_governor_dbs(struct cpufreq_policy *policy,
		struct common_dbs_data *cdata, unsigned int event);
void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
		unsigned int delay, bool all_cpus);
void od_register_powersave_bias_handler(unsigned int (*f)
		(struct cpufreq_policy *, unsigned int, unsigned int),
		unsigned int powersave_bias);
void od_unregister_powersave_bias_handler(void);
void hp_register_powersave_bias_handler(unsigned int (*f)
		(struct cpufreq_policy *, unsigned int, unsigned int),
		unsigned int powersave_bias);
void hp_unregister_powersave_bias_handler(void);
#endif /* _CPUFREQ_GOVERNOR_H */
Commit	Line	Data
4471a34f VK	1	/*
	2	* drivers/cpufreq/cpufreq_governor.h
	3	*
	4	* Header file for CPUFreq governors common code
	5	*
	6	* Copyright (C) 2001 Russell King
	7	* (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.
	8	* (C) 2003 Jun Nakajima <jun.nakajima@intel.com>
	9	* (C) 2009 Alexander Clouter <alex@digriz.org.uk>
	10	* (c) 2012 Viresh Kumar <viresh.kumar@linaro.org>
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*/
	16
beb0ff39 BP	17	#ifndef _CPUFREQ_GOVERNOR_H
beb0ff39 BP	18	#define _CPUFREQ_GOVERNOR_H
4471a34f	19
4471a34f VK	20	#include <linux/cpufreq.h>
	21	#include <linux/kobject.h>
	22	#include <linux/mutex.h>
	23	#include <linux/workqueue.h>
	24	#include <linux/sysfs.h>
	25
	26	/*
	27	* The polling frequency depends on the capability of the processor. Default
	28	* polling frequency is 1000 times the transition latency of the processor. The
	29	* governor will work on any processor with transition latency <= 10mS, using
	30	* appropriate sampling rate.
	31	*
	32	* For CPUs with transition latency > 10mS (mostly drivers with CPUFREQ_ETERNAL)
	33	* this governor will not work. All times here are in uS.
	34	*/
	35	#define MIN_SAMPLING_RATE_RATIO (2)
	36	#define LATENCY_MULTIPLIER (1000)
98104ee2	37	#define MIN_LATENCY_MULTIPLIER (20)
4471a34f VK	38	#define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000)
	39
	40	/* Ondemand Sampling types */
	41	enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE};
	42
6fa3eb70 S	43	/* Hotplug Sampling types */
	44	enum {HP_NORMAL_SAMPLE, HP_SUB_SAMPLE};
	45
4d5dcc42 VK	46	/*
	47	* Macro for creating governors sysfs routines
	48	*
	49	* - gov_sys: One governor instance per whole system
	50	* - gov_pol: One governor instance per policy
	51	*/
	52
	53	/* Create attributes */
	54	#define gov_sys_attr_ro(_name) \
	55	static struct global_attr _name##_gov_sys = \
	56	__ATTR(_name, 0444, show_##_name##_gov_sys, NULL)
	57
	58	#define gov_sys_attr_rw(_name) \
	59	static struct global_attr _name##_gov_sys = \
	60	__ATTR(_name, 0644, show_##_name##_gov_sys, store_##_name##_gov_sys)
	61
	62	#define gov_pol_attr_ro(_name) \
	63	static struct freq_attr _name##_gov_pol = \
	64	__ATTR(_name, 0444, show_##_name##_gov_pol, NULL)
	65
	66	#define gov_pol_attr_rw(_name) \
	67	static struct freq_attr _name##_gov_pol = \
	68	__ATTR(_name, 0644, show_##_name##_gov_pol, store_##_name##_gov_pol)
	69
	70	#define gov_sys_pol_attr_rw(_name) \
	71	gov_sys_attr_rw(_name); \
	72	gov_pol_attr_rw(_name)
	73
	74	#define gov_sys_pol_attr_ro(_name) \
	75	gov_sys_attr_ro(_name); \
	76	gov_pol_attr_ro(_name)
	77
	78	/* Create show/store routines */
	79	#define show_one(_gov, file_name) \
	80	static ssize_t show_##file_name##_gov_sys \
4471a34f VK	81	(struct kobject kobj, struct attribute attr, char *buf) \
4471a34f VK	82	{ \
4d5dcc42 VK	83	struct _gov##_dbs_tuners *tuners = _gov##_dbs_cdata.gdbs_data->tuners; \
	84	return sprintf(buf, "%u\n", tuners->file_name); \
	85	} \
	86	\
	87	static ssize_t show_##file_name##_gov_pol \
	88	(struct cpufreq_policy policy, char buf) \
	89	{ \
	90	struct dbs_data *dbs_data = policy->governor_data; \
	91	struct _gov##_dbs_tuners *tuners = dbs_data->tuners; \
	92	return sprintf(buf, "%u\n", tuners->file_name); \
	93	}
	94
	95	#define store_one(_gov, file_name) \
	96	static ssize_t store_##file_name##_gov_sys \
	97	(struct kobject kobj, struct attribute attr, const char *buf, size_t count) \
	98	{ \
	99	struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data; \
	100	return store_##file_name(dbs_data, buf, count); \
	101	} \
	102	\
	103	static ssize_t store_##file_name##_gov_pol \
	104	(struct cpufreq_policy policy, const char buf, size_t count) \
	105	{ \
	106	struct dbs_data *dbs_data = policy->governor_data; \
	107	return store_##file_name(dbs_data, buf, count); \
4471a34f VK	108	}
4471a34f VK	109
4d5dcc42 VK	110	#define show_store_one(_gov, file_name) \
	111	show_one(_gov, file_name); \
	112	store_one(_gov, file_name)
	113
	114	/* create helper routines */
4471a34f VK	115	#define define_get_cpu_dbs_routines(_dbs_info) \
	116	static struct cpu_dbs_common_info *get_cpu_cdbs(int cpu) \
	117	{ \
	118	return &per_cpu(_dbs_info, cpu).cdbs; \
	119	} \
	120	\
	121	static void *get_cpu_dbs_info_s(int cpu) \
	122	{ \
	123	return &per_cpu(_dbs_info, cpu); \
	124	}
	125
	126	/*
	127	* Abbreviations:
	128	* dbs: used as a shortform for demand based switching It helps to keep variable
	129	* names smaller, simpler
	130	* cdbs: common dbs
e5dde92c	131	* od_*: On-demand governor
4471a34f	132	* cs_*: Conservative governor
6fa3eb70	133	* hp_*: Hotplug governor
4471a34f VK	134	*/
	135
	136	/* Per cpu structures */
	137	struct cpu_dbs_common_info {
	138	int cpu;
1e7586a1 VK	139	u64 prev_cpu_idle;
	140	u64 prev_cpu_wall;
	141	u64 prev_cpu_nice;
4471a34f VK	142	struct cpufreq_policy *cur_policy;
	143	struct delayed_work work;
	144	/*
	145	* percpu mutex that serializes governor limit change with gov_dbs_timer
	146	* invocation. We do not want gov_dbs_timer to run when user is changing
	147	* the governor or limits.
	148	*/
	149	struct mutex timer_mutex;
da53d61e	150	ktime_t time_stamp;
4471a34f VK	151	};
	152
	153	struct od_cpu_dbs_info_s {
	154	struct cpu_dbs_common_info cdbs;
4471a34f VK	155	struct cpufreq_frequency_table *freq_table;
	156	unsigned int freq_lo;
	157	unsigned int freq_lo_jiffies;
	158	unsigned int freq_hi_jiffies;
	159	unsigned int rate_mult;
	160	unsigned int sample_type:1;
	161	};
	162
	163	struct cs_cpu_dbs_info_s {
	164	struct cpu_dbs_common_info cdbs;
	165	unsigned int down_skip;
	166	unsigned int requested_freq;
	167	unsigned int enable:1;
	168	};
	169
6fa3eb70 S	170	struct hp_cpu_dbs_info_s {
	171	struct cpu_dbs_common_info cdbs;
	172	struct cpufreq_frequency_table *freq_table;
	173	unsigned int freq_lo;
	174	unsigned int freq_lo_jiffies;
	175	unsigned int freq_hi_jiffies;
	176	unsigned int rate_mult;
	177	unsigned int sample_type:1;
	178	};
	179
4d5dcc42	180	/* Per policy Governers sysfs tunables */
4471a34f	181	struct od_dbs_tuners {
da712f3a	182	unsigned int ignore_nice_load;
4471a34f VK	183	unsigned int sampling_rate;
	184	unsigned int sampling_down_factor;
	185	unsigned int up_threshold;
4471a34f VK	186	unsigned int powersave_bias;
	187	unsigned int io_is_busy;
	188	};
	189
	190	struct cs_dbs_tuners {
da712f3a	191	unsigned int ignore_nice_load;
4471a34f VK	192	unsigned int sampling_rate;
	193	unsigned int sampling_down_factor;
	194	unsigned int up_threshold;
	195	unsigned int down_threshold;
	196	unsigned int freq_step;
	197	};
	198
6fa3eb70 S	199	struct hp_dbs_tuners {
	200	unsigned int ignore_nice_load;
	201	unsigned int sampling_rate;
	202	unsigned int sampling_down_factor;
	203	unsigned int up_threshold;
	204	unsigned int adj_up_threshold;
	205	unsigned int powersave_bias;
	206	unsigned int io_is_busy;
	207	// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
	208	unsigned int down_differential;
	209	unsigned int cpu_up_threshold;
	210	unsigned int cpu_down_differential;
	211	unsigned int cpu_up_avg_times;
	212	unsigned int cpu_down_avg_times;
	213	unsigned int cpu_num_limit;
	214	unsigned int cpu_num_base;
	215	unsigned int is_cpu_hotplug_disable;
	216	unsigned int cpu_input_boost_enable;
	217	unsigned int cpu_input_boost_num;
	218	unsigned int cpu_rush_boost_enable;
	219	unsigned int cpu_rush_boost_num;
	220	unsigned int cpu_rush_threshold;
	221	unsigned int cpu_rush_tlp_times;
	222	unsigned int cpu_rush_avg_times;
	223	// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	224	};
	225
4d5dcc42 VK	226	/* Common Governer data across policies */
	227	struct dbs_data;
	228	struct common_dbs_data {
4471a34f VK	229	/* Common across governors */
	230	#define GOV_ONDEMAND 0
	231	#define GOV_CONSERVATIVE 1
6fa3eb70	232	#define GOV_HOTPLUG 2
4471a34f	233	int governor;
4d5dcc42 VK	234	struct attribute_group attr_group_gov_sys; / one governor - system */
4d5dcc42 VK	235	struct attribute_group attr_group_gov_pol; / one governor - policy */
4471a34f	236
4d5dcc42 VK	237	/* Common data for platforms that don't set have_governor_per_policy */
4d5dcc42 VK	238	struct dbs_data *gdbs_data;
4471a34f VK	239
	240	struct cpu_dbs_common_info (get_cpu_cdbs)(int cpu);
	241	void (get_cpu_dbs_info_s)(int cpu);
	242	void (gov_dbs_timer)(struct work_struct work);
	243	void (*gov_check_cpu)(int cpu, unsigned int load);
4d5dcc42 VK	244	int (init)(struct dbs_data dbs_data);
4d5dcc42 VK	245	void (exit)(struct dbs_data dbs_data);
4471a34f VK	246
	247	/* Governor specific ops, see below */
	248	void *gov_ops;
	249	};
	250
4d5dcc42 VK	251	/* Governer Per policy data */
	252	struct dbs_data {
	253	struct common_dbs_data *cdata;
	254	unsigned int min_sampling_rate;
a97c98ad	255	int usage_count;
4d5dcc42 VK	256	void *tuners;
	257
	258	/* dbs_mutex protects dbs_enable in governor start/stop */
	259	struct mutex mutex;
	260	};
	261
4471a34f VK	262	/* Governor specific ops, will be passed to dbs_data->gov_ops */
4471a34f VK	263	struct od_ops {
4471a34f VK	264	void (*powersave_bias_init_cpu)(int cpu);
	265	unsigned int (powersave_bias_target)(struct cpufreq_policy policy,
	266	unsigned int freq_next, unsigned int relation);
	267	void (freq_increase)(struct cpufreq_policy p, unsigned int freq);
	268	};
	269
	270	struct cs_ops {
	271	struct notifier_block *notifier_block;
	272	};
	273
6fa3eb70 S	274	struct hp_ops {
	275	void (*powersave_bias_init_cpu)(int cpu);
	276	unsigned int (powersave_bias_target)(struct cpufreq_policy policy,
	277	unsigned int freq_next, unsigned int relation);
	278	void (freq_increase)(struct cpufreq_policy p, unsigned int freq);
	279	struct input_handler *input_handler; // <-XXX
	280	};
	281
4471a34f VK	282	static inline int delay_for_sampling_rate(unsigned int sampling_rate)
	283	{
	284	int delay = usecs_to_jiffies(sampling_rate);
	285
	286	/* We want all CPUs to do sampling nearly on same jiffy */
	287	if (num_online_cpus() > 1)
	288	delay -= jiffies % delay;
	289
	290	return delay;
	291	}
	292
4d5dcc42 VK	293	#define declare_show_sampling_rate_min(_gov) \
	294	static ssize_t show_sampling_rate_min_gov_sys \
	295	(struct kobject kobj, struct attribute attr, char *buf) \
	296	{ \
	297	struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data; \
	298	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \
	299	} \
	300	\
	301	static ssize_t show_sampling_rate_min_gov_pol \
	302	(struct cpufreq_policy policy, char buf) \
	303	{ \
	304	struct dbs_data *dbs_data = policy->governor_data; \
	305	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \
	306	}
	307
4471a34f	308	void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
4447266b VK	309	bool need_load_eval(struct cpu_dbs_common_info *cdbs,
4447266b VK	310	unsigned int sampling_rate);
4d5dcc42 VK	311	int cpufreq_governor_dbs(struct cpufreq_policy *policy,
4d5dcc42 VK	312	struct common_dbs_data *cdata, unsigned int event);
031299b3 VK	313	void gov_queue_work(struct dbs_data dbs_data, struct cpufreq_policy policy,
031299b3 VK	314	unsigned int delay, bool all_cpus);
fb30809e JS	315	void od_register_powersave_bias_handler(unsigned int (*f)
	316	(struct cpufreq_policy *, unsigned int, unsigned int),
	317	unsigned int powersave_bias);
	318	void od_unregister_powersave_bias_handler(void);
6fa3eb70 S	319	void hp_register_powersave_bias_handler(unsigned int (*f)
	320	(struct cpufreq_policy *, unsigned int, unsigned int),
	321	unsigned int powersave_bias);
	322	void hp_unregister_powersave_bias_handler(void);
beb0ff39	323	#endif /* _CPUFREQ_GOVERNOR_H */