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Merge back earlier 'pm-cpufreq' material

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This commit is contained in:
Rafael J. Wysocki 2013-08-14 22:21:16 +02:00
commit c49a089c3e
52 changed files with 683 additions and 854 deletions
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2
Documentation/cpu-freq/cpu-drivers.txt
View File

@ -50,8 +50,6 @@ What shall this struct cpufreq_driver contain?
cpufreq_driver.name - The name of this driver.
cpufreq_driver.owner - THIS_MODULE;
cpufreq_driver.init - A pointer to the per-CPU initialization
function.

29
arch/x86/include/asm/processor.h
View File

@ -942,35 +942,6 @@ extern int set_tsc_mode(unsigned int val);
extern u16 amd_get_nb_id(int cpu);
struct aperfmperf {
u64 aperf, mperf;
};
static inline void get_aperfmperf(struct aperfmperf *am)
{
WARN_ON_ONCE(!boot_cpu_has(X86_FEATURE_APERFMPERF));
rdmsrl(MSR_IA32_APERF, am->aperf);
rdmsrl(MSR_IA32_MPERF, am->mperf);
}
#define APERFMPERF_SHIFT 10
static inline
unsigned long calc_aperfmperf_ratio(struct aperfmperf *old,
struct aperfmperf *new)
{
u64 aperf = new->aperf - old->aperf;
u64 mperf = new->mperf - old->mperf;
unsigned long ratio = aperf;
mperf >>= APERFMPERF_SHIFT;
if (mperf)
ratio = div64_u64(aperf, mperf);
return ratio;
}
extern unsigned long arch_align_stack(unsigned long sp);
extern void free_init_pages(char *what, unsigned long begin, unsigned long end);

2
drivers/cpufreq/Makefile
View File

@ -23,7 +23,7 @@ obj-$(CONFIG_GENERIC_CPUFREQ_CPU0) += cpufreq-cpu0.o
# powernow-k8 can load then. ACPI is preferred to all other hardware-specific drivers.
# speedstep-* is preferred over p4-clockmod.
obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o mperf.o
obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o
obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o
obj-$(CONFIG_X86_PCC_CPUFREQ) += pcc-cpufreq.o
obj-$(CONFIG_X86_POWERNOW_K6) += powernow-k6.o

10
drivers/cpufreq/acpi-cpufreq.c
View File

@ -45,7 +45,6 @@
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/cpufeature.h>
#include "mperf.h"
MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
MODULE_DESCRIPTION("ACPI Processor P-States Driver");
@ -710,7 +709,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
return blacklisted;
#endif
data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@ -800,7 +799,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
goto err_unreg;
}
data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
data->freq_table = kmalloc(sizeof(*data->freq_table) *
(perf->state_count+1), GFP_KERNEL);
if (!data->freq_table) {
result = -ENOMEM;
@ -861,10 +860,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
/* Check for APERF/MPERF support in hardware */
if (boot_cpu_has(X86_FEATURE_APERFMPERF))
acpi_cpufreq_driver.getavg = cpufreq_get_measured_perf;
pr_debug("CPU%u - ACPI performance management activated.\n", cpu);
for (i = 0; i < perf->state_count; i++)
pr_debug(" %cP%d: %d MHz, %d mW, %d uS\n",
@ -941,7 +936,6 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
.exit = acpi_cpufreq_cpu_exit,
.resume = acpi_cpufreq_resume,
.name = "acpi-cpufreq",
.owner = THIS_MODULE,
.attr = acpi_cpufreq_attr,
};

1
drivers/cpufreq/at32ap-cpufreq.c
View File

@ -108,7 +108,6 @@ static int __init at32_cpufreq_driver_init(struct cpufreq_policy *policy)
static struct cpufreq_driver at32_driver = {
.name = "at32ap",
.owner = THIS_MODULE,
.init = at32_cpufreq_driver_init,
.verify = at32_verify_speed,
.target = at32_set_target,

1
drivers/cpufreq/blackfin-cpufreq.c
View File

@ -225,7 +225,6 @@ static struct cpufreq_driver bfin_driver = {
.get = bfin_getfreq_khz,
.init = __bfin_cpu_init,
.name = "bfin cpufreq",
.owner = THIS_MODULE,
.attr = bfin_freq_attr,
};

1
drivers/cpufreq/cpufreq-nforce2.c
View File

@ -379,7 +379,6 @@ static struct cpufreq_driver nforce2_driver = {
.get = nforce2_get,
.init = nforce2_cpu_init,
.exit = nforce2_cpu_exit,
.owner = THIS_MODULE,
};
#ifdef MODULE

730
drivers/cpufreq/cpufreq.c
View File

File diff suppressed because it is too large Load Diff

14
drivers/cpufreq/cpufreq_conservative.c
View File

@ -11,19 +11,7 @@
* published by the Free Software Foundation.
*/
#include <linux/cpufreq.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/percpu-defs.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include "cpufreq_governor.h"
/* Conservative governor macros */
@ -329,7 +317,7 @@ static int cs_init(struct dbs_data *dbs_data)
{
struct cs_dbs_tuners *tuners;
tuners = kzalloc(sizeof(struct cs_dbs_tuners), GFP_KERNEL);
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
return -ENOMEM;

16
drivers/cpufreq/cpufreq_governor.c
View File

@ -16,15 +16,9 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <asm/cputime.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/export.h>
#include <linux/kernel_stat.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include "cpufreq_governor.h"
@ -53,7 +47,7 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
policy = cdbs->cur_policy;
/* Get Absolute Load (in terms of freq for ondemand gov) */
/* Get Absolute Load */
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_common_info *j_cdbs;
u64 cur_wall_time, cur_idle_time;
@ -104,14 +98,6 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
load = 100 * (wall_time - idle_time) / wall_time;
if (dbs_data->cdata->governor == GOV_ONDEMAND) {
int freq_avg = __cpufreq_driver_getavg(policy, j);
if (freq_avg <= 0)
freq_avg = policy->cur;
load *= freq_avg;
}
if (load > max_load)
max_load = load;
}

8
drivers/cpufreq/cpufreq_governor.h
View File

@ -18,10 +18,9 @@
#define _CPUFREQ_GOVERNOR_H
#include <linux/cpufreq.h>
#include <linux/kobject.h>
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/sysfs.h>
/*
* The polling frequency depends on the capability of the processor. Default
@ -169,7 +168,6 @@ struct od_dbs_tuners {
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;
};
@ -223,7 +221,7 @@ 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);
void (*freq_increase)(struct cpufreq_policy *policy, unsigned int freq);
};
struct cs_ops {

63
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -12,28 +12,16 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/cpufreq.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/cpu.h>
#include <linux/percpu-defs.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/tick.h>
#include <linux/types.h>
#include <linux/cpu.h>
#include "cpufreq_governor.h"
/* On-demand governor macros */
#define DEF_FREQUENCY_DOWN_DIFFERENTIAL (10)
#define DEF_FREQUENCY_UP_THRESHOLD (80)
#define DEF_SAMPLING_DOWN_FACTOR (1)
#define MAX_SAMPLING_DOWN_FACTOR (100000)
#define MICRO_FREQUENCY_DOWN_DIFFERENTIAL (3)
#define MICRO_FREQUENCY_UP_THRESHOLD (95)
#define MICRO_FREQUENCY_MIN_SAMPLE_RATE (10000)
#define MIN_FREQUENCY_UP_THRESHOLD (11)
@ -144,31 +132,27 @@ static void ondemand_powersave_bias_init(void)
}
}
static void dbs_freq_increase(struct cpufreq_policy *p, unsigned int freq)
static void dbs_freq_increase(struct cpufreq_policy *policy, unsigned int freq)
{
struct dbs_data *dbs_data = p->governor_data;
struct dbs_data *dbs_data = policy->governor_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
if (od_tuners->powersave_bias)
freq = od_ops.powersave_bias_target(p, freq,
freq = od_ops.powersave_bias_target(policy, freq,
CPUFREQ_RELATION_H);
else if (p->cur == p->max)
else if (policy->cur == policy->max)
return;
__cpufreq_driver_target(p, freq, od_tuners->powersave_bias ?
__cpufreq_driver_target(policy, freq, od_tuners->powersave_bias ?
CPUFREQ_RELATION_L : CPUFREQ_RELATION_H);
}
/*
* Every sampling_rate, we check, if current idle time is less than 20%
* (default), then we try to increase frequency. Every sampling_rate, we look
* for the lowest frequency which can sustain the load while keeping idle time
* over 30%. If such a frequency exist, we try to decrease to this frequency.
*
* Any frequency increase takes it to the maximum frequency. Frequency reduction
* happens at minimum steps of 5% (default) of current frequency
* (default), then we try to increase frequency. Else, we adjust the frequency
* proportional to load.
*/
static void od_check_cpu(int cpu, unsigned int load_freq)
static void od_check_cpu(int cpu, unsigned int load)
{
struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info, cpu);
struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy;
@ -178,29 +162,17 @@ static void od_check_cpu(int cpu, unsigned int load_freq)
dbs_info->freq_lo = 0;
/* Check for frequency increase */
if (load_freq > od_tuners->up_threshold * policy->cur) {
if (load > od_tuners->up_threshold) {
/* If switching to max speed, apply sampling_down_factor */
if (policy->cur < policy->max)
dbs_info->rate_mult =
od_tuners->sampling_down_factor;
dbs_freq_increase(policy, policy->max);
return;
}
/* Check for frequency decrease */
/* if we cannot reduce the frequency anymore, break out early */
if (policy->cur == policy->min)
return;
/*
* The optimal frequency is the frequency that is the lowest that can
* support the current CPU usage without triggering the up policy. To be
* safe, we focus 10 points under the threshold.
*/
if (load_freq < od_tuners->adj_up_threshold
* policy->cur) {
} else {
/* Calculate the next frequency proportional to load */
unsigned int freq_next;
freq_next = load_freq / od_tuners->adj_up_threshold;
freq_next = load * policy->cpuinfo.max_freq / 100;
/* No longer fully busy, reset rate_mult */
dbs_info->rate_mult = 1;
@ -374,9 +346,6 @@ static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf,
input < MIN_FREQUENCY_UP_THRESHOLD) {
return -EINVAL;
}
/* Calculate the new adj_up_threshold */
od_tuners->adj_up_threshold += input;
od_tuners->adj_up_threshold -= od_tuners->up_threshold;
od_tuners->up_threshold = input;
return count;
@ -513,7 +482,7 @@ static int od_init(struct dbs_data *dbs_data)
u64 idle_time;
int cpu;
tuners = kzalloc(sizeof(struct od_dbs_tuners), GFP_KERNEL);
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
return -ENOMEM;
@ -525,8 +494,6 @@ static int od_init(struct dbs_data *dbs_data)
if (idle_time != -1ULL) {
/* Idle micro accounting is supported. Use finer thresholds */
tuners->up_threshold = MICRO_FREQUENCY_UP_THRESHOLD;
tuners->adj_up_threshold = MICRO_FREQUENCY_UP_THRESHOLD -
MICRO_FREQUENCY_DOWN_DIFFERENTIAL;
/*
* In nohz/micro accounting case we set the minimum frequency
* not depending on HZ, but fixed (very low). The deferred
@ -535,8 +502,6 @@ static int od_init(struct dbs_data *dbs_data)
dbs_data->min_sampling_rate = MICRO_FREQUENCY_MIN_SAMPLE_RATE;
} else {
tuners->up_threshold = DEF_FREQUENCY_UP_THRESHOLD;
tuners->adj_up_threshold = DEF_FREQUENCY_UP_THRESHOLD -
DEF_FREQUENCY_DOWN_DIFFERENTIAL;
/* For correct statistics, we need 10 ticks for each measure */
dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *

3
drivers/cpufreq/cpufreq_performance.c
View File

@ -12,10 +12,9 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpufreq.h>
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_performance(struct cpufreq_policy *policy,
unsigned int event)

3
drivers/cpufreq/cpufreq_powersave.c
View File

@ -12,10 +12,9 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpufreq.h>
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
unsigned int event)

31
drivers/cpufreq/cpufreq_stats.c
View File

@ -9,17 +9,10 @@
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/sysfs.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/percpu.h>
#include <linux/kobject.h>
#include <linux/spinlock.h>
#include <linux/notifier.h>
#include <linux/slab.h>
#include <asm/cputime.h>
static spinlock_t cpufreq_stats_lock;
@ -200,22 +193,22 @@ static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
{
unsigned int i, j, count = 0, ret = 0;
struct cpufreq_stats *stat;
struct cpufreq_policy *data;
struct cpufreq_policy *current_policy;
unsigned int alloc_size;
unsigned int cpu = policy->cpu;
if (per_cpu(cpufreq_stats_table, cpu))
return -EBUSY;
stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL);
stat = kzalloc(sizeof(*stat), GFP_KERNEL);
if ((stat) == NULL)
return -ENOMEM;
data = cpufreq_cpu_get(cpu);
if (data == NULL) {
current_policy = cpufreq_cpu_get(cpu);
if (current_policy == NULL) {
ret = -EINVAL;
goto error_get_fail;
}
ret = sysfs_create_group(&data->kobj, &stats_attr_group);
ret = sysfs_create_group(&current_policy->kobj, &stats_attr_group);
if (ret)
goto error_out;
@ -258,10 +251,10 @@ static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
stat->last_time = get_jiffies_64();
stat->last_index = freq_table_get_index(stat, policy->cur);
spin_unlock(&cpufreq_stats_lock);
cpufreq_cpu_put(data);
cpufreq_cpu_put(current_policy);
return 0;
error_out:
cpufreq_cpu_put(data);
cpufreq_cpu_put(current_policy);
error_get_fail:
kfree(stat);
per_cpu(cpufreq_stats_table, cpu) = NULL;
@ -348,16 +341,10 @@ static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
unsigned int cpu = (unsigned long)hcpu;
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cpufreq_update_policy(cpu);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
cpufreq_stats_free_sysfs(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
cpufreq_stats_free_table(cpu);
break;
}
@ -390,8 +377,6 @@ static int __init cpufreq_stats_init(void)
return ret;
register_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
for_each_online_cpu(cpu)
cpufreq_update_policy(cpu);
ret = cpufreq_register_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);

1
drivers/cpufreq/cris-artpec3-cpufreq.c
View File

@ -111,7 +111,6 @@ static struct cpufreq_driver cris_freq_driver = {
.init = cris_freq_cpu_init,
.exit = cris_freq_cpu_exit,
.name = "cris_freq",
.owner = THIS_MODULE,
.attr = cris_freq_attr,
};

1
drivers/cpufreq/cris-etraxfs-cpufreq.c
View File

@ -108,7 +108,6 @@ static struct cpufreq_driver cris_freq_driver = {
.init = cris_freq_cpu_init,
.exit = cris_freq_cpu_exit,
.name = "cris_freq",
.owner = THIS_MODULE,
.attr = cris_freq_attr,
};

5
drivers/cpufreq/e_powersaver.c
View File

@ -54,7 +54,7 @@ static struct acpi_processor_performance *eps_acpi_cpu_perf;
/* Minimum necessary to get acpi_processor_get_bios_limit() working */
static int eps_acpi_init(void)
{
eps_acpi_cpu_perf = kzalloc(sizeof(struct acpi_processor_performance),
eps_acpi_cpu_perf = kzalloc(sizeof(*eps_acpi_cpu_perf),
GFP_KERNEL);
if (!eps_acpi_cpu_perf)
return -ENOMEM;
@ -366,7 +366,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
states = 2;
/* Allocate private data and frequency table for current cpu */
centaur = kzalloc(sizeof(struct eps_cpu_data)
centaur = kzalloc(sizeof(*centaur)
+ (states + 1) * sizeof(struct cpufreq_frequency_table),
GFP_KERNEL);
if (!centaur)
@ -436,7 +436,6 @@ static struct cpufreq_driver eps_driver = {
.exit = eps_cpu_exit,
.get = eps_get,
.name = "e_powersaver",
.owner = THIS_MODULE,
.attr = eps_attr,
};

1
drivers/cpufreq/elanfreq.c
View File

@ -274,7 +274,6 @@ static struct cpufreq_driver elanfreq_driver = {
.init = elanfreq_cpu_init,
.exit = elanfreq_cpu_exit,
.name = "elanfreq",
.owner = THIS_MODULE,
.attr = elanfreq_attr,
};

2
drivers/cpufreq/exynos-cpufreq.c
View File

@ -289,7 +289,7 @@ static int __init exynos_cpufreq_init(void)
{
int ret = -EINVAL;
exynos_info = kzalloc(sizeof(struct exynos_dvfs_info), GFP_KERNEL);
exynos_info = kzalloc(sizeof(*exynos_info), GFP_KERNEL);
if (!exynos_info)
return -ENOMEM;

4
drivers/cpufreq/freq_table.c
View File

@ -11,10 +11,8 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
/*********************************************************************
* FREQUENCY TABLE HELPERS *

3
drivers/cpufreq/gx-suspmod.c
View File

@ -446,7 +446,6 @@ static struct cpufreq_driver gx_suspmod_driver = {
.target = cpufreq_gx_target,
.init = cpufreq_gx_cpu_init,
.name = "gx-suspmod",
.owner = THIS_MODULE,
};
static int __init cpufreq_gx_init(void)
@ -466,7 +465,7 @@ static int __init cpufreq_gx_init(void)
pr_debug("geode suspend modulation available.\n");
params = kzalloc(sizeof(struct gxfreq_params), GFP_KERNEL);
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (params == NULL)
return -ENOMEM;

5
drivers/cpufreq/ia64-acpi-cpufreq.c
View File

@ -274,7 +274,7 @@ acpi_cpufreq_cpu_init (
pr_debug("acpi_cpufreq_cpu_init\n");
data = kzalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL);
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return (-ENOMEM);
@ -304,7 +304,7 @@ acpi_cpufreq_cpu_init (
}
/* alloc freq_table */
data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
data->freq_table = kmalloc(sizeof(*data->freq_table) *
(data->acpi_data.state_count + 1),
GFP_KERNEL);
if (!data->freq_table) {
@ -409,7 +409,6 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
.init = acpi_cpufreq_cpu_init,
.exit = acpi_cpufreq_cpu_exit,
.name = "acpi-cpufreq",
.owner = THIS_MODULE,
.attr = acpi_cpufreq_attr,
};

1
drivers/cpufreq/intel_pstate.c
View File

@ -665,7 +665,6 @@ static struct cpufreq_driver intel_pstate_driver = {
.init = intel_pstate_cpu_init,
.exit = intel_pstate_cpu_exit,
.name = "intel_pstate",
.owner = THIS_MODULE,
};
static int __initdata no_load;

1
drivers/cpufreq/kirkwood-cpufreq.c
View File

@ -158,7 +158,6 @@ static struct cpufreq_driver kirkwood_cpufreq_driver = {
.init = kirkwood_cpufreq_cpu_init,
.exit = kirkwood_cpufreq_cpu_exit,
.name = "kirkwood-cpufreq",
.owner = THIS_MODULE,
.attr = kirkwood_cpufreq_attr,
};

1
drivers/cpufreq/longhaul.c
View File

@ -948,7 +948,6 @@ static struct cpufreq_driver longhaul_driver = {
.init = longhaul_cpu_init,
.exit = longhaul_cpu_exit,
.name = "longhaul",
.owner = THIS_MODULE,
.attr = longhaul_attr,
};

1
drivers/cpufreq/longrun.c
View File

@ -286,7 +286,6 @@ static struct cpufreq_driver longrun_driver = {
.get = longrun_get,
.init = longrun_cpu_init,
.name = "longrun",
.owner = THIS_MODULE,
};
static const struct x86_cpu_id longrun_ids[] = {

1
drivers/cpufreq/loongson2_cpufreq.c
View File

@ -158,7 +158,6 @@ static struct freq_attr *loongson2_table_attr[] = {
};
static struct cpufreq_driver loongson2_cpufreq_driver = {
.owner = THIS_MODULE,
.name = "loongson2",
.init = loongson2_cpufreq_cpu_init,
.verify = loongson2_cpufreq_verify,

1
drivers/cpufreq/maple-cpufreq.c
View File

@ -190,7 +190,6 @@ static int maple_cpufreq_cpu_init(struct cpufreq_policy *policy)
static struct cpufreq_driver maple_cpufreq_driver = {
.name = "maple",
.owner = THIS_MODULE,
.flags = CPUFREQ_CONST_LOOPS,
.init = maple_cpufreq_cpu_init,
.verify = maple_cpufreq_verify,

51
drivers/cpufreq/mperf.c
View File

@ -1,51 +0,0 @@
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include "mperf.h"
static DEFINE_PER_CPU(struct aperfmperf, acfreq_old_perf);
/* Called via smp_call_function_single(), on the target CPU */
static void read_measured_perf_ctrs(void *_cur)
{
struct aperfmperf *am = _cur;
get_aperfmperf(am);
}
/*
* Return the measured active (C0) frequency on this CPU since last call
* to this function.
* Input: cpu number
* Return: Average CPU frequency in terms of max frequency (zero on error)
*
* We use IA32_MPERF and IA32_APERF MSRs to get the measured performance
* over a period of time, while CPU is in C0 state.
* IA32_MPERF counts at the rate of max advertised frequency
* IA32_APERF counts at the rate of actual CPU frequency
* Only IA32_APERF/IA32_MPERF ratio is architecturally defined and
* no meaning should be associated with absolute values of these MSRs.
*/
unsigned int cpufreq_get_measured_perf(struct cpufreq_policy *policy,
unsigned int cpu)
{
struct aperfmperf perf;
unsigned long ratio;
unsigned int retval;
if (smp_call_function_single(cpu, read_measured_perf_ctrs, &perf, 1))
return 0;
ratio = calc_aperfmperf_ratio(&per_cpu(acfreq_old_perf, cpu), &perf);
per_cpu(acfreq_old_perf, cpu) = perf;
retval = (policy->cpuinfo.max_freq * ratio) >> APERFMPERF_SHIFT;
return retval;
}
EXPORT_SYMBOL_GPL(cpufreq_get_measured_perf);
MODULE_LICENSE("GPL");

9
drivers/cpufreq/mperf.h
View File

@ -1,9 +0,0 @@
/*
* (c) 2010 Advanced Micro Devices, Inc.
* Your use of this code is subject to the terms and conditions of the
* GNU general public license version 2. See "COPYING" or
* http://www.gnu.org/licenses/gpl.html
*/
unsigned int cpufreq_get_measured_perf(struct cpufreq_policy *policy,
unsigned int cpu);

1
drivers/cpufreq/p4-clockmod.c
View File

@ -279,7 +279,6 @@ static struct cpufreq_driver p4clockmod_driver = {
.exit = cpufreq_p4_cpu_exit,
.get = cpufreq_p4_get,
.name = "p4-clockmod",
.owner = THIS_MODULE,
.attr = p4clockmod_attr,
};

1
drivers/cpufreq/pasemi-cpufreq.c
View File

@ -297,7 +297,6 @@ static int pas_cpufreq_target(struct cpufreq_policy *policy,
static struct cpufreq_driver pas_cpufreq_driver = {
.name = "pas-cpufreq",
.owner = THIS_MODULE,
.flags = CPUFREQ_CONST_LOOPS,
.init = pas_cpufreq_cpu_init,
.exit = pas_cpufreq_cpu_exit,

1
drivers/cpufreq/pcc-cpufreq.c
View File

@ -587,7 +587,6 @@ static struct cpufreq_driver pcc_cpufreq_driver = {
.init = pcc_cpufreq_cpu_init,
.exit = pcc_cpufreq_cpu_exit,
.name = "pcc-cpufreq",
.owner = THIS_MODULE,
};
static int __init pcc_cpufreq_init(void)

1
drivers/cpufreq/pmac32-cpufreq.c
View File

@ -477,7 +477,6 @@ static struct cpufreq_driver pmac_cpufreq_driver = {
.flags = CPUFREQ_PM_NO_WARN,
.attr = pmac_cpu_freqs_attr,
.name = "powermac",
.owner = THIS_MODULE,
};

6
drivers/cpufreq/pmac64-cpufreq.c
View File

@ -371,7 +371,6 @@ static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy)
static struct cpufreq_driver g5_cpufreq_driver = {
.name = "powermac",
.owner = THIS_MODULE,
.flags = CPUFREQ_CONST_LOOPS,
.init = g5_cpufreq_cpu_init,
.verify = g5_cpufreq_verify,
@ -447,9 +446,8 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpus)
if (!shdr)
goto bail_noprops;
g5_fvt_table = (struct smu_sdbp_fvt *)&shdr[1];
ssize = (shdr->len * sizeof(u32)) -
sizeof(struct smu_sdbp_header);
g5_fvt_count = ssize / sizeof(struct smu_sdbp_fvt);
ssize = (shdr->len * sizeof(u32)) - sizeof(*shdr);
g5_fvt_count = ssize / sizeof(*g5_fvt_table);
g5_fvt_cur = 0;
/* Sanity checking */

1
drivers/cpufreq/powernow-k6.c
View File

@ -207,7 +207,6 @@ static struct cpufreq_driver powernow_k6_driver = {
.exit = powernow_k6_cpu_exit,
.get = powernow_k6_get,
.name = "powernow-k6",
.owner = THIS_MODULE,
.attr = powernow_k6_attr,
};

14
drivers/cpufreq/powernow-k7.c
View File

@ -177,7 +177,7 @@ static int get_ranges(unsigned char *pst)
unsigned int speed;
u8 fid, vid;
powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
powernow_table = kzalloc((sizeof(*powernow_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table)
return -ENOMEM;
@ -309,8 +309,7 @@ static int powernow_acpi_init(void)
goto err0;
}
acpi_processor_perf = kzalloc(sizeof(struct acpi_processor_performance),
GFP_KERNEL);
acpi_processor_perf = kzalloc(sizeof(*acpi_processor_perf), GFP_KERNEL);
if (!acpi_processor_perf) {
retval = -ENOMEM;
goto err0;
@ -346,7 +345,7 @@ static int powernow_acpi_init(void)
goto err2;
}
powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
powernow_table = kzalloc((sizeof(*powernow_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table) {
retval = -ENOMEM;
@ -497,7 +496,7 @@ static int powernow_decode_bios(int maxfid, int startvid)
"relevant to this CPU).\n",
psb->numpst);
p += sizeof(struct psb_s);
p += sizeof(*psb);
pst = (struct pst_s *) p;
@ -510,12 +509,12 @@ static int powernow_decode_bios(int maxfid, int startvid)
(maxfid == pst->maxfid) &&
(startvid == pst->startvid)) {
print_pst_entry(pst, j);
p = (char *)pst + sizeof(struct pst_s);
p = (char *)pst + sizeof(*pst);
ret = get_ranges(p);
return ret;
} else {
unsigned int k;
p = (char *)pst + sizeof(struct pst_s);
p = (char *)pst + sizeof(*pst);
for (k = 0; k < number_scales; k++)
p += 2;
}
@ -717,7 +716,6 @@ static struct cpufreq_driver powernow_driver = {
.init = powernow_cpu_init,
.exit = powernow_cpu_exit,
.name = "powernow-k7",
.owner = THIS_MODULE,
.attr = powernow_table_attr,
};

7
drivers/cpufreq/powernow-k8.c
View File

@ -623,7 +623,7 @@ static int fill_powernow_table(struct powernow_k8_data *data,
if (check_pst_table(data, pst, maxvid))
return -EINVAL;
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
powernow_table = kmalloc((sizeof(*powernow_table)
* (data->numps + 1)), GFP_KERNEL);
if (!powernow_table) {
printk(KERN_ERR PFX "powernow_table memory alloc failure\n");
@ -793,7 +793,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
}
/* fill in data->powernow_table */
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
powernow_table = kmalloc((sizeof(*powernow_table)
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
if (!powernow_table) {
pr_debug("powernow_table memory alloc failure\n");
@ -1106,7 +1106,7 @@ static int powernowk8_cpu_init(struct cpufreq_policy *pol)
if (rc)
return -ENODEV;
data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL);
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
printk(KERN_ERR PFX "unable to alloc powernow_k8_data");
return -ENOMEM;
@ -1240,7 +1240,6 @@ static struct cpufreq_driver cpufreq_amd64_driver = {
.exit = powernowk8_cpu_exit,
.get = powernowk8_get,
.name = "powernow-k8",
.owner = THIS_MODULE,
.attr = powernow_k8_attr,
};

1
drivers/cpufreq/ppc-corenet-cpufreq.c
View File

@ -300,7 +300,6 @@ static struct freq_attr *corenet_cpufreq_attr[] = {
static struct cpufreq_driver ppc_corenet_cpufreq_driver = {
.name = "ppc_cpufreq",
.owner = THIS_MODULE,
.flags = CPUFREQ_CONST_LOOPS,
.init = corenet_cpufreq_cpu_init,
.exit = __exit_p(corenet_cpufreq_cpu_exit),

1
drivers/cpufreq/ppc_cbe_cpufreq.c
View File

@ -181,7 +181,6 @@ static struct cpufreq_driver cbe_cpufreq_driver = {
.init = cbe_cpufreq_cpu_init,
.exit = cbe_cpufreq_cpu_exit,
.name = "cbe-cpufreq",
.owner = THIS_MODULE,
.flags = CPUFREQ_CONST_LOOPS,
};

1
drivers/cpufreq/s3c2416-cpufreq.c
View File

@ -524,7 +524,6 @@ static struct freq_attr *s3c2416_cpufreq_attr[] = {
};
static struct cpufreq_driver s3c2416_cpufreq_driver = {
.owner = THIS_MODULE,
.flags = 0,
.verify = s3c2416_cpufreq_verify_speed,
.target = s3c2416_cpufreq_set_target,

6
drivers/cpufreq/s3c24xx-cpufreq.c
View File

@ -522,7 +522,7 @@ int __init s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
/* Copy the board information so that each board can make this
* initdata. */
ours = kzalloc(sizeof(struct s3c_cpufreq_board), GFP_KERNEL);
ours = kzalloc(sizeof(*ours), GFP_KERNEL);
if (ours == NULL) {
printk(KERN_ERR "%s: no memory\n", __func__);
return -ENOMEM;
@ -615,7 +615,7 @@ static int s3c_cpufreq_build_freq(void)
size = cpu_cur.info->calc_freqtable(&cpu_cur, NULL, 0);
size++;
ftab = kmalloc(sizeof(struct cpufreq_frequency_table) * size, GFP_KERNEL);
ftab = kmalloc(sizeof(*ftab) * size, GFP_KERNEL);
if (!ftab) {
printk(KERN_ERR "%s: no memory for tables\n", __func__);
return -ENOMEM;
@ -691,7 +691,7 @@ int __init s3c_plltab_register(struct cpufreq_frequency_table *plls,
struct cpufreq_frequency_table *vals;
unsigned int size;
size = sizeof(struct cpufreq_frequency_table) * (plls_no + 1);
size = sizeof(*vals) * (plls_no + 1);
vals = kmalloc(size, GFP_KERNEL);
if (vals) {

1
drivers/cpufreq/s3c64xx-cpufreq.c
View File

@ -263,7 +263,6 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
}
static struct cpufreq_driver s3c64xx_cpufreq_driver = {
.owner = THIS_MODULE,
.flags = 0,
.verify = s3c64xx_cpufreq_verify_speed,
.target = s3c64xx_cpufreq_set_target,

1
drivers/cpufreq/sc520_freq.c
View File

@ -147,7 +147,6 @@ static struct cpufreq_driver sc520_freq_driver = {
.init = sc520_freq_cpu_init,
.exit = sc520_freq_cpu_exit,
.name = "sc520_freq",
.owner = THIS_MODULE,
.attr = sc520_freq_attr,
};

1
drivers/cpufreq/sh-cpufreq.c
View File

@ -160,7 +160,6 @@ static struct freq_attr *sh_freq_attr[] = {
};
static struct cpufreq_driver sh_cpufreq_driver = {
.owner = THIS_MODULE,
.name = "sh",
.get = sh_cpufreq_get,
.target = sh_cpufreq_target,

6
drivers/cpufreq/sparc-us2e-cpufreq.c
View File

@ -351,12 +351,11 @@ static int __init us2e_freq_init(void)
struct cpufreq_driver *driver;
ret = -ENOMEM;
driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
driver = kzalloc(sizeof(*driver), GFP_KERNEL);
if (!driver)
goto err_out;
us2e_freq_table = kzalloc(
(NR_CPUS * sizeof(struct us2e_freq_percpu_info)),
us2e_freq_table = kzalloc((NR_CPUS * sizeof(*us2e_freq_table)),
GFP_KERNEL);
if (!us2e_freq_table)
goto err_out;
@ -366,7 +365,6 @@ static int __init us2e_freq_init(void)
driver->target = us2e_freq_target;
driver->get = us2e_freq_get;
driver->exit = us2e_freq_cpu_exit;
driver->owner = THIS_MODULE,
strcpy(driver->name, "UltraSPARC-IIe");
cpufreq_us2e_driver = driver;

6
drivers/cpufreq/sparc-us3-cpufreq.c
View File

@ -212,12 +212,11 @@ static int __init us3_freq_init(void)
struct cpufreq_driver *driver;
ret = -ENOMEM;
driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
driver = kzalloc(sizeof(*driver), GFP_KERNEL);
if (!driver)
goto err_out;
us3_freq_table = kzalloc(
(NR_CPUS * sizeof(struct us3_freq_percpu_info)),
us3_freq_table = kzalloc((NR_CPUS * sizeof(*us3_freq_table)),
GFP_KERNEL);
if (!us3_freq_table)
goto err_out;
@ -227,7 +226,6 @@ static int __init us3_freq_init(void)
driver->target = us3_freq_target;
driver->get = us3_freq_get;
driver->exit = us3_freq_cpu_exit;
driver->owner = THIS_MODULE,
strcpy(driver->name, "UltraSPARC-III");
cpufreq_us3_driver = driver;

1
drivers/cpufreq/speedstep-centrino.c
View File

@ -575,7 +575,6 @@ static struct cpufreq_driver centrino_driver = {
.target = centrino_target,
.get = get_cur_freq,
.attr = centrino_attr,
.owner = THIS_MODULE,
};
/*

1
drivers/cpufreq/speedstep-ich.c
View File

@ -378,7 +378,6 @@ static struct cpufreq_driver speedstep_driver = {
.init = speedstep_cpu_init,
.exit = speedstep_cpu_exit,
.get = speedstep_get,
.owner = THIS_MODULE,
.attr = speedstep_attr,
};

1
drivers/cpufreq/speedstep-smi.c
View File

@ -375,7 +375,6 @@ static struct cpufreq_driver speedstep_driver = {
.exit = speedstep_cpu_exit,
.get = speedstep_get,
.resume = speedstep_resume,
.owner = THIS_MODULE,
.attr = speedstep_attr,
};

476
include/linux/cpufreq.h
View File

@ -11,71 +11,36 @@
#ifndef _LINUX_CPUFREQ_H
#define _LINUX_CPUFREQ_H
#include <asm/cputime.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/threads.h>
#include <linux/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
/* Print length for names. Extra 1 space for accomodating '\n' in prints */
#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
#include <linux/completion.h>
#include <linux/kobject.h>
#include <linux/notifier.h>
#include <linux/sysfs.h>
/*********************************************************************
* CPUFREQ NOTIFIER INTERFACE *
* CPUFREQ INTERFACE *
*********************************************************************/
#define CPUFREQ_TRANSITION_NOTIFIER (0)
#define CPUFREQ_POLICY_NOTIFIER (1)
#ifdef CONFIG_CPU_FREQ
int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
extern void disable_cpufreq(void);
#else /* CONFIG_CPU_FREQ */
static inline int cpufreq_register_notifier(struct notifier_block *nb,
unsigned int list)
{
return 0;
}
static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
unsigned int list)
{
return 0;
}
static inline void disable_cpufreq(void) { }
#endif /* CONFIG_CPU_FREQ */
/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
* within the limits is used. If (cpufreq_driver->setpolicy> exists, these
* two generic policies are available:
*/
#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.
/*
* Frequency values here are CPU kHz
*
* Maximum transition latency is in nanoseconds - if it's unknown,
* CPUFREQ_ETERNAL shall be used.
*/
#define CPUFREQ_ETERNAL (-1)
#define CPUFREQ_NAME_LEN 16
/* Print length for names. Extra 1 space for accomodating '\n' in prints */
#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
struct cpufreq_governor;
/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
extern struct kobject *cpufreq_global_kobject;
int cpufreq_get_global_kobject(void);
void cpufreq_put_global_kobject(void);
int cpufreq_sysfs_create_file(const struct attribute *attr);
void cpufreq_sysfs_remove_file(const struct attribute *attr);
struct cpufreq_freqs {
unsigned int cpu; /* cpu nr */
unsigned int old;
unsigned int new;
u8 flags; /* flags of cpufreq_driver, see below. */
};
#define CPUFREQ_ETERNAL (-1)
struct cpufreq_cpuinfo {
unsigned int max_freq;
unsigned int min_freq;
@ -117,111 +82,59 @@ struct cpufreq_policy {
struct cpufreq_real_policy user_policy;
struct list_head policy_list;
struct kobject kobj;
struct completion kobj_unregister;
int transition_ongoing; /* Tracks transition status */
};
#define CPUFREQ_ADJUST (0)
#define CPUFREQ_INCOMPATIBLE (1)
#define CPUFREQ_NOTIFY (2)
#define CPUFREQ_START (3)
#define CPUFREQ_UPDATE_POLICY_CPU (4)
/* Only for ACPI */
#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*/
struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
void cpufreq_cpu_put(struct cpufreq_policy *policy);
static inline bool policy_is_shared(struct cpufreq_policy *policy)
{
return cpumask_weight(policy->cpus) > 1;
}
/******************** cpufreq transition notifiers *******************/
/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
extern struct kobject *cpufreq_global_kobject;
int cpufreq_get_global_kobject(void);
void cpufreq_put_global_kobject(void);
int cpufreq_sysfs_create_file(const struct attribute *attr);
void cpufreq_sysfs_remove_file(const struct attribute *attr);
#define CPUFREQ_PRECHANGE (0)
#define CPUFREQ_POSTCHANGE (1)
#define CPUFREQ_RESUMECHANGE (8)
#define CPUFREQ_SUSPENDCHANGE (9)
#ifdef CONFIG_CPU_FREQ
unsigned int cpufreq_get(unsigned int cpu);
unsigned int cpufreq_quick_get(unsigned int cpu);
unsigned int cpufreq_quick_get_max(unsigned int cpu);
void disable_cpufreq(void);
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)
u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
int cpufreq_update_policy(unsigned int cpu);
bool have_governor_per_policy(void);
struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
#else
static inline unsigned int cpufreq_get(unsigned int cpu)
{
#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;
return 0;
}
static inline unsigned int cpufreq_quick_get(unsigned int cpu)
{
return 0;
}
static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
{
return 0;
}
static inline void disable_cpufreq(void) { }
#endif
};
/*********************************************************************
* CPUFREQ GOVERNORS *
*********************************************************************/
#define CPUFREQ_GOV_START 1
#define CPUFREQ_GOV_STOP 2
#define CPUFREQ_GOV_LIMITS 3
#define CPUFREQ_GOV_POLICY_INIT 4
#define CPUFREQ_GOV_POLICY_EXIT 5
struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
int initialized;
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 *
@ -230,76 +143,6 @@ void cpufreq_unregister_governor(struct cpufreq_governor *governor);
#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;
/*
* This should be set by platforms having multiple clock-domains, i.e.
* supporting multiple policies. With this sysfs directories of governor
* would be created in cpu/cpu<num>/cpufreq/ directory and so they can
* use the same governor with different tunables for different clusters.
*/
bool have_governor_per_policy;
/* 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_policy *policy,
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 *);
@ -334,52 +177,181 @@ __ATTR(_name, 0444, show_##_name, NULL)
static struct global_attr _name = \
__ATTR(_name, 0644, show_##_name, store_##_name)
struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
void cpufreq_cpu_put(struct cpufreq_policy *data);
struct cpufreq_driver {
char name[CPUFREQ_NAME_LEN];
u8 flags;
/*
* This should be set by platforms having multiple clock-domains, i.e.
* supporting multiple policies. With this sysfs directories of governor
* would be created in cpu/cpu<num>/cpufreq/ directory and so they can
* use the same governor with different tunables for different clusters.
*/
bool have_governor_per_policy;
/* 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 */
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);
const char *cpufreq_get_current_driver(void);
/*********************************************************************
* CPUFREQ 2.6. INTERFACE *
*********************************************************************/
u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
int cpufreq_update_policy(unsigned int cpu);
bool have_governor_per_policy(void);
struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
#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)
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
unsigned int min, unsigned int max)
{
return 0;
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;
}
#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);
unsigned int cpufreq_quick_get_max(unsigned int cpu);
#else
static inline unsigned int cpufreq_quick_get(unsigned int cpu)
{
return 0;
}
static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
{
return 0;
}
#endif
/*********************************************************************
* CPUFREQ DEFAULT GOVERNOR *
* CPUFREQ NOTIFIER INTERFACE *
*********************************************************************/
#define CPUFREQ_TRANSITION_NOTIFIER (0)
#define CPUFREQ_POLICY_NOTIFIER (1)
/* Transition notifiers */
#define CPUFREQ_PRECHANGE (0)
#define CPUFREQ_POSTCHANGE (1)
#define CPUFREQ_RESUMECHANGE (8)
#define CPUFREQ_SUSPENDCHANGE (9)
/* Policy Notifiers */
#define CPUFREQ_ADJUST (0)
#define CPUFREQ_INCOMPATIBLE (1)
#define CPUFREQ_NOTIFY (2)
#define CPUFREQ_START (3)
#define CPUFREQ_UPDATE_POLICY_CPU (4)
#ifdef CONFIG_CPU_FREQ
int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
void cpufreq_notify_transition(struct cpufreq_policy *policy,
struct cpufreq_freqs *freqs, unsigned int state);
#else /* CONFIG_CPU_FREQ */
static inline int cpufreq_register_notifier(struct notifier_block *nb,
unsigned int list)
{
return 0;
}
static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
unsigned int list)
{
return 0;
}
#endif /* !CONFIG_CPU_FREQ */
/**
* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
* safe)
* @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 *
*********************************************************************/
/*
* 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)
/* Governor Events */
#define CPUFREQ_GOV_START 1
#define CPUFREQ_GOV_STOP 2
#define CPUFREQ_GOV_LIMITS 3
#define CPUFREQ_GOV_POLICY_INIT 4
#define CPUFREQ_GOV_POLICY_EXIT 5
struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
int initialized;
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 */
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
@ -428,18 +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 */