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Merge branch 'pm-cpufreq'

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* pm-cpufreq: (41 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  cpufreq: Reuse new freq-table helpers
  cpufreq: Handle sorted frequency tables more efficiently
  cpufreq: Drop redundant check from cpufreq_update_current_freq()
  intel_pstate: Declare pid_params/pstate_funcs/hwp_active __read_mostly
  intel_pstate: add __init/__initdata marker to some functions/variables
  intel_pstate: Fix incorrect placement of __initdata
  cpufreq: mvebu: fix integer to pointer cast
  cpufreq: intel_pstate: Broxton support
  cpufreq: conservative: Do not use transition notifications
  ...
This commit is contained in:
Rafael J. Wysocki 2016-07-25 13:46:08 +02:00
parent 9fedbb3b6b da7d3abe1c
commit 9def970ead
29 changed files with 912 additions and 785 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
Documentation/cpu-freq/core.txt
View file

@ -96,7 +96,7 @@ new - new frequency
For details about OPP, see Documentation/power/opp.txt
dev_pm_opp_init_cpufreq_table - cpufreq framework typically is initialized with
cpufreq_frequency_table_cpuinfo which is provided with the list of
cpufreq_table_validate_and_show() which is provided with the list of
frequencies that are available for operation. This function provides
a ready to use conversion routine to translate the OPP layer's internal
information about the available frequencies into a format readily
@ -110,7 +110,7 @@ dev_pm_opp_init_cpufreq_table - cpufreq framework typically is initialized with
/* Do things */
r = dev_pm_opp_init_cpufreq_table(dev, &freq_table);
if (!r)
cpufreq_frequency_table_cpuinfo(policy, freq_table);
cpufreq_table_validate_and_show(policy, freq_table);
/* Do other things */
}

10
Documentation/cpu-freq/cpu-drivers.txt
View file

@ -231,7 +231,7 @@ if you want to skip one entry in the table, set the frequency to
CPUFREQ_ENTRY_INVALID. The entries don't need to be in ascending
order.
By calling cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
By calling cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table);
the cpuinfo.min_freq and cpuinfo.max_freq values are detected, and
policy->min and policy->max are set to the same values. This is
@ -244,14 +244,12 @@ policy->max, and all other criteria are met. This is helpful for the
->verify call.
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int target_freq,
unsigned int relation,
unsigned int *index);
unsigned int relation);
is the corresponding frequency table helper for the ->target
stage. Just pass the values to this function, and the unsigned int
index returns the number of the frequency table entry which contains
stage. Just pass the values to this function, and this function
returns the number of the frequency table entry which contains
the frequency the CPU shall be set to.
The following macros can be used as iterators over cpufreq_frequency_table:

4
Documentation/cpu-freq/pcc-cpufreq.txt
View file

@ -159,8 +159,8 @@ to be strictly associated with a P-state.
2.2 cpuinfo_transition_latency:
-------------------------------
The cpuinfo_transition_latency field is CPUFREQ_ETERNAL. The PCC specification
does not include a field to expose this value currently.
The cpuinfo_transition_latency field is 0. The PCC specification does
not include a field to expose this value currently.
2.3 cpuinfo_cur_freq:
---------------------

86
arch/powerpc/platforms/cell/cpufreq_spudemand.c
View file

@ -85,61 +85,57 @@ static void spu_gov_cancel_work(struct spu_gov_info_struct *info)
cancel_delayed_work_sync(&info->work);
}
static int spu_gov_govern(struct cpufreq_policy *policy, unsigned int event)
static int spu_gov_start(struct cpufreq_policy *policy)
{
unsigned int cpu = policy->cpu;
struct spu_gov_info_struct *info, *affected_info;
struct spu_gov_info_struct *info = &per_cpu(spu_gov_info, cpu);
struct spu_gov_info_struct *affected_info;
int i;
int ret = 0;
info = &per_cpu(spu_gov_info, cpu);
switch (event) {
case CPUFREQ_GOV_START:
if (!cpu_online(cpu)) {
printk(KERN_ERR "cpu %d is not online\n", cpu);
ret = -EINVAL;
break;
}
if (!policy->cur) {
printk(KERN_ERR "no cpu specified in policy\n");
ret = -EINVAL;
break;
}
/* initialize spu_gov_info for all affected cpus */
for_each_cpu(i, policy->cpus) {
affected_info = &per_cpu(spu_gov_info, i);
affected_info->policy = policy;
}
info->poll_int = POLL_TIME;
/* setup timer */
spu_gov_init_work(info);
break;
case CPUFREQ_GOV_STOP:
/* cancel timer */
spu_gov_cancel_work(info);
/* clean spu_gov_info for all affected cpus */
for_each_cpu (i, policy->cpus) {
info = &per_cpu(spu_gov_info, i);
info->policy = NULL;
}
break;
if (!cpu_online(cpu)) {
printk(KERN_ERR "cpu %d is not online\n", cpu);
return -EINVAL;
}
return ret;
if (!policy->cur) {
printk(KERN_ERR "no cpu specified in policy\n");
return -EINVAL;
}
/* initialize spu_gov_info for all affected cpus */
for_each_cpu(i, policy->cpus) {
affected_info = &per_cpu(spu_gov_info, i);
affected_info->policy = policy;
}
info->poll_int = POLL_TIME;
/* setup timer */
spu_gov_init_work(info);
return 0;
}
static void spu_gov_stop(struct cpufreq_policy *policy)
{
unsigned int cpu = policy->cpu;
struct spu_gov_info_struct *info = &per_cpu(spu_gov_info, cpu);
int i;
/* cancel timer */
spu_gov_cancel_work(info);
/* clean spu_gov_info for all affected cpus */
for_each_cpu (i, policy->cpus) {
info = &per_cpu(spu_gov_info, i);
info->policy = NULL;
}
}
static struct cpufreq_governor spu_governor = {
.name = "spudemand",
.governor = spu_gov_govern,
.start = spu_gov_start,
.stop = spu_gov_stop,
.owner = THIS_MODULE,
};

13
drivers/cpufreq/Kconfig
View file

@ -31,23 +31,18 @@ config CPU_FREQ_BOOST_SW
depends on THERMAL
config CPU_FREQ_STAT
tristate "CPU frequency translation statistics"
bool "CPU frequency transition statistics"
default y
help
This driver exports CPU frequency statistics information through sysfs
file system.
To compile this driver as a module, choose M here: the
module will be called cpufreq_stats.
Export CPU frequency statistics information through sysfs.
If in doubt, say N.
config CPU_FREQ_STAT_DETAILS
bool "CPU frequency translation statistics details"
bool "CPU frequency transition statistics details"
depends on CPU_FREQ_STAT
help
This will show detail CPU frequency translation table in sysfs file
system.
Show detailed CPU frequency transition table in sysfs.
If in doubt, say N.

17
drivers/cpufreq/acpi-cpufreq.c
View file

@ -468,20 +468,17 @@ unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy,
struct acpi_cpufreq_data *data = policy->driver_data;
struct acpi_processor_performance *perf;
struct cpufreq_frequency_table *entry;
unsigned int next_perf_state, next_freq, freq;
unsigned int next_perf_state, next_freq, index;
/*
* Find the closest frequency above target_freq.
*
* The table is sorted in the reverse order with respect to the
* frequency and all of the entries are valid (see the initialization).
*/
entry = policy->freq_table;
do {
entry++;
freq = entry->frequency;
} while (freq >= target_freq && freq != CPUFREQ_TABLE_END);
entry--;
if (policy->cached_target_freq == target_freq)
index = policy->cached_resolved_idx;
else
index = cpufreq_table_find_index_dl(policy, target_freq);
entry = &policy->freq_table[index];
next_freq = entry->frequency;
next_perf_state = entry->driver_data;

10
drivers/cpufreq/amd_freq_sensitivity.c
View file

@ -48,9 +48,8 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct dbs_data *od_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = od_data->tuners;
struct od_policy_dbs_info *od_info = to_dbs_info(policy_dbs);
if (!od_info->freq_table)
if (!policy->freq_table)
return freq_next;
rdmsr_on_cpu(policy->cpu, MSR_AMD64_FREQ_SENSITIVITY_ACTUAL,
@ -92,10 +91,9 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
else {
unsigned int index;
cpufreq_frequency_table_target(policy,
od_info->freq_table, policy->cur - 1,
CPUFREQ_RELATION_H, &index);
freq_next = od_info->freq_table[index].frequency;
index = cpufreq_table_find_index_h(policy,
policy->cur - 1);
freq_next = policy->freq_table[index].frequency;
}
data->freq_prev = freq_next;

221
drivers/cpufreq/cpufreq.c
View file

@ -74,19 +74,12 @@ static inline bool has_target(void)
}
/* internal prototypes */
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
static int cpufreq_init_governor(struct cpufreq_policy *policy);
static void cpufreq_exit_governor(struct cpufreq_policy *policy);
static int cpufreq_start_governor(struct cpufreq_policy *policy);
static inline void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
}
static inline void cpufreq_stop_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_STOP);
}
static void cpufreq_stop_governor(struct cpufreq_policy *policy);
static void cpufreq_governor_limits(struct cpufreq_policy *policy);
/**
* Two notifier lists: the "policy" list is involved in the
@ -133,15 +126,6 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
{
struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
return policy && !policy_is_inactive(policy) ?
policy->freq_table : NULL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
u64 idle_time;
@ -354,6 +338,7 @@ static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
pr_debug("FREQ: %lu - CPU: %lu\n",
(unsigned long)freqs->new, (unsigned long)freqs->cpu);
trace_cpu_frequency(freqs->new, freqs->cpu);
cpufreq_stats_record_transition(policy, freqs->new);
srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_POSTCHANGE, freqs);
if (likely(policy) && likely(policy->cpu == freqs->cpu))
@ -507,6 +492,38 @@ void cpufreq_disable_fast_switch(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(cpufreq_disable_fast_switch);
/**
* cpufreq_driver_resolve_freq - Map a target frequency to a driver-supported
* one.
* @target_freq: target frequency to resolve.
*
* The target to driver frequency mapping is cached in the policy.
*
* Return: Lowest driver-supported frequency greater than or equal to the
* given target_freq, subject to policy (min/max) and driver limitations.
*/
unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq)
{
target_freq = clamp_val(target_freq, policy->min, policy->max);
policy->cached_target_freq = target_freq;
if (cpufreq_driver->target_index) {
int idx;
idx = cpufreq_frequency_table_target(policy, target_freq,
CPUFREQ_RELATION_L);
policy->cached_resolved_idx = idx;
return policy->freq_table[idx].frequency;
}
if (cpufreq_driver->resolve_freq)
return cpufreq_driver->resolve_freq(policy, target_freq);
return target_freq;
}
EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
/*********************************************************************
* SYSFS INTERFACE *
*********************************************************************/
@ -1115,6 +1132,7 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy, bool notify)
CPUFREQ_REMOVE_POLICY, policy);
down_write(&policy->rwsem);
cpufreq_stats_free_table(policy);
cpufreq_remove_dev_symlink(policy);
kobj = &policy->kobj;
cmp = &policy->kobj_unregister;
@ -1265,13 +1283,12 @@ static int cpufreq_online(unsigned int cpu)
}
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
if (new_policy) {
ret = cpufreq_add_dev_interface(policy);
if (ret)
goto out_exit_policy;
cpufreq_stats_create_table(policy);
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_CREATE_POLICY, policy);
@ -1280,6 +1297,9 @@ static int cpufreq_online(unsigned int cpu)
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
ret = cpufreq_init_policy(policy);
if (ret) {
pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
@ -1556,9 +1576,6 @@ static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
if (cpufreq_suspended)
return 0;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
@ -1864,14 +1881,17 @@ static int __target_intermediate(struct cpufreq_policy *policy,
return ret;
}
static int __target_index(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *freq_table, int index)
static int __target_index(struct cpufreq_policy *policy, int index)
{
struct cpufreq_freqs freqs = {.old = policy->cur, .flags = 0};
unsigned int intermediate_freq = 0;
unsigned int newfreq = policy->freq_table[index].frequency;
int retval = -EINVAL;
bool notify;
if (newfreq == policy->cur)
return 0;
notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
if (notify) {
/* Handle switching to intermediate frequency */
@ -1886,7 +1906,7 @@ static int __target_index(struct cpufreq_policy *policy,
freqs.old = freqs.new;
}
freqs.new = freq_table[index].frequency;
freqs.new = newfreq;
pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
__func__, policy->cpu, freqs.old, freqs.new);
@ -1923,17 +1943,13 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int relation)
{
unsigned int old_target_freq = target_freq;
struct cpufreq_frequency_table *freq_table;
int index, retval;
int index;
if (cpufreq_disabled())
return -ENODEV;
/* Make sure that target_freq is within supported range */
if (target_freq > policy->max)
target_freq = policy->max;
if (target_freq < policy->min)
target_freq = policy->min;
target_freq = clamp_val(target_freq, policy->min, policy->max);
pr_debug("target for CPU %u: %u kHz, relation %u, requested %u kHz\n",
policy->cpu, target_freq, relation, old_target_freq);
@ -1956,23 +1972,9 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
if (!cpufreq_driver->target_index)
return -EINVAL;
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (unlikely(!freq_table)) {
pr_err("%s: Unable to find freq_table\n", __func__);
return -EINVAL;
}
index = cpufreq_frequency_table_target(policy, target_freq, relation);
retval = cpufreq_frequency_table_target(policy, freq_table, target_freq,
relation, &index);
if (unlikely(retval)) {
pr_err("%s: Unable to find matching freq\n", __func__);
return retval;
}
if (freq_table[index].frequency == policy->cur)
return 0;
return __target_index(policy, freq_table, index);
return __target_index(policy, index);
}
EXPORT_SYMBOL_GPL(__cpufreq_driver_target);
@ -1997,7 +1999,7 @@ __weak struct cpufreq_governor *cpufreq_fallback_governor(void)
return NULL;
}
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
static int cpufreq_init_governor(struct cpufreq_policy *policy)
{
int ret;
@ -2025,36 +2027,82 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
}
}
if (event == CPUFREQ_GOV_POLICY_INIT)
if (!try_module_get(policy->governor->owner))
return -EINVAL;
if (!try_module_get(policy->governor->owner))
return -EINVAL;
pr_debug("%s: for CPU %u, event %u\n", __func__, policy->cpu, event);
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
ret = policy->governor->governor(policy, event);
if (event == CPUFREQ_GOV_POLICY_INIT) {
if (ret)
if (policy->governor->init) {
ret = policy->governor->init(policy);
if (ret) {
module_put(policy->governor->owner);
else
policy->governor->initialized++;
} else if (event == CPUFREQ_GOV_POLICY_EXIT) {
policy->governor->initialized--;
module_put(policy->governor->owner);
return ret;
}
}
return ret;
return 0;
}
static void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->exit)
policy->governor->exit(policy);
module_put(policy->governor->owner);
}
static int cpufreq_start_governor(struct cpufreq_policy *policy)
{
int ret;
if (cpufreq_suspended)
return 0;
if (!policy->governor)
return -EINVAL;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
cpufreq_update_current_freq(policy);
ret = cpufreq_governor(policy, CPUFREQ_GOV_START);
return ret ? ret : cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
if (policy->governor->start) {
ret = policy->governor->start(policy);
if (ret)
return ret;
}
if (policy->governor->limits)
policy->governor->limits(policy);
return 0;
}
static void cpufreq_stop_governor(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->stop)
policy->governor->stop(policy);
}
static void cpufreq_governor_limits(struct cpufreq_policy *policy)
{
if (cpufreq_suspended || !policy->governor)
return;
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (policy->governor->limits)
policy->governor->limits(policy);
}
int cpufreq_register_governor(struct cpufreq_governor *governor)
@ -2069,7 +2117,6 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
mutex_lock(&cpufreq_governor_mutex);
governor->initialized = 0;
err = -EBUSY;
if (!find_governor(governor->name)) {
err = 0;
@ -2184,6 +2231,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
policy->min = new_policy->min;
policy->max = new_policy->max;
policy->cached_target_freq = UINT_MAX;
pr_debug("new min and max freqs are %u - %u kHz\n",
policy->min, policy->max);
@ -2195,7 +2244,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
if (new_policy->governor == policy->governor) {
pr_debug("cpufreq: governor limits update\n");
return cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
cpufreq_governor_limits(policy);
return 0;
}
pr_debug("governor switch\n");
@ -2210,7 +2260,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
/* start new governor */
policy->governor = new_policy->governor;
ret = cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT);
ret = cpufreq_init_governor(policy);
if (!ret) {
ret = cpufreq_start_governor(policy);
if (!ret) {
@ -2224,7 +2274,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
pr_debug("starting governor %s failed\n", policy->governor->name);
if (old_gov) {
policy->governor = old_gov;
if (cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT))
if (cpufreq_init_governor(policy))
policy->governor = NULL;
else
cpufreq_start_governor(policy);
@ -2309,26 +2359,25 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
*********************************************************************/
static int cpufreq_boost_set_sw(int state)
{
struct cpufreq_frequency_table *freq_table;
struct cpufreq_policy *policy;
int ret = -EINVAL;
for_each_active_policy(policy) {
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (freq_table) {
ret = cpufreq_frequency_table_cpuinfo(policy,
freq_table);
if (ret) {
pr_err("%s: Policy frequency update failed\n",
__func__);
break;
}
if (!policy->freq_table)
continue;
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
up_write(&policy->rwsem);
ret = cpufreq_frequency_table_cpuinfo(policy,
policy->freq_table);
if (ret) {
pr_err("%s: Policy frequency update failed\n",
__func__);
break;
}
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor_limits(policy);
up_write(&policy->rwsem);
}
return ret;

88
drivers/cpufreq/cpufreq_conservative.c
View file

@ -17,7 +17,6 @@
struct cs_policy_dbs_info {
struct policy_dbs_info policy_dbs;
unsigned int down_skip;
unsigned int requested_freq;
};
static inline struct cs_policy_dbs_info *to_dbs_info(struct policy_dbs_info *policy_dbs)
@ -75,19 +74,17 @@ static unsigned int cs_dbs_timer(struct cpufreq_policy *policy)
/* Check for frequency increase */
if (load > dbs_data->up_threshold) {
unsigned int requested_freq = policy->cur;
dbs_info->down_skip = 0;
/* if we are already at full speed then break out early */
if (dbs_info->requested_freq == policy->max)
if (requested_freq == policy->max)
goto out;
dbs_info->requested_freq += get_freq_target(cs_tuners, policy);
requested_freq += get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq > policy->max)
dbs_info->requested_freq = policy->max;
__cpufreq_driver_target(policy, dbs_info->requested_freq,
CPUFREQ_RELATION_H);
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_H);
goto out;
}
@ -98,36 +95,27 @@ static unsigned int cs_dbs_timer(struct cpufreq_policy *policy)
/* Check for frequency decrease */
if (load < cs_tuners->down_threshold) {
unsigned int freq_target;
unsigned int freq_target, requested_freq = policy->cur;
/*
* if we cannot reduce the frequency anymore, break out early
*/
if (policy->cur == policy->min)
if (requested_freq == policy->min)
goto out;
freq_target = get_freq_target(cs_tuners, policy);
if (dbs_info->requested_freq > freq_target)
dbs_info->requested_freq -= freq_target;
if (requested_freq > freq_target)
requested_freq -= freq_target;
else
dbs_info->requested_freq = policy->min;
requested_freq = policy->min;
__cpufreq_driver_target(policy, dbs_info->requested_freq,
CPUFREQ_RELATION_L);
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_L);
}
out:
return dbs_data->sampling_rate;
}
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data);
static struct notifier_block cs_cpufreq_notifier_block = {
.notifier_call = dbs_cpufreq_notifier,
};
/************************** sysfs interface ************************/
static struct dbs_governor cs_dbs_gov;
static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set,
const char *buf, size_t count)
@ -268,15 +256,13 @@ static void cs_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int cs_init(struct dbs_data *dbs_data, bool notify)
static int cs_init(struct dbs_data *dbs_data)
{
struct cs_dbs_tuners *tuners;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
tuners->down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD;
tuners->freq_step = DEF_FREQUENCY_STEP;
@ -288,19 +274,11 @@ static int cs_init(struct dbs_data *dbs_data, bool notify)
dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *
jiffies_to_usecs(10);
if (notify)
cpufreq_register_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
return 0;
}
static void cs_exit(struct dbs_data *dbs_data, bool notify)
static void cs_exit(struct dbs_data *dbs_data)
{
if (notify)
cpufreq_unregister_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
kfree(dbs_data->tuners);
}
@ -309,16 +287,10 @@ static void cs_start(struct cpufreq_policy *policy)
struct cs_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
dbs_info->down_skip = 0;
dbs_info->requested_freq = policy->cur;
}
static struct dbs_governor cs_dbs_gov = {
.gov = {
.name = "conservative",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
},
static struct dbs_governor cs_governor = {
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("conservative"),
.kobj_type = { .default_attrs = cs_attributes },
.gov_dbs_timer = cs_dbs_timer,
.alloc = cs_alloc,
@ -328,33 +300,7 @@ static struct dbs_governor cs_dbs_gov = {
.start = cs_start,
};
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_dbs_gov.gov)
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data)
{
struct cpufreq_freqs *freq = data;
struct cpufreq_policy *policy = cpufreq_cpu_get_raw(freq->cpu);
struct cs_policy_dbs_info *dbs_info;
if (!policy)
return 0;
/* policy isn't governed by conservative governor */
if (policy->governor != CPU_FREQ_GOV_CONSERVATIVE)
return 0;
dbs_info = to_dbs_info(policy->governor_data);
/*
* we only care if our internally tracked freq moves outside the 'valid'
* ranges of frequency available to us otherwise we do not change it
*/
if (dbs_info->requested_freq > policy->max
|| dbs_info->requested_freq < policy->min)
dbs_info->requested_freq = freq->new;
return 0;
}
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_governor.gov)
static int __init cpufreq_gov_dbs_init(void)
{

75
drivers/cpufreq/cpufreq_governor.c
View file

@ -336,17 +336,6 @@ static inline void gov_clear_update_util(struct cpufreq_policy *policy)
synchronize_sched();
}
static void gov_cancel_work(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *policy,
struct dbs_governor *gov)
{
@ -389,7 +378,7 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs,
gov->free(policy_dbs);
}
static int cpufreq_governor_init(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct dbs_data *dbs_data;
@ -429,7 +418,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
gov_attr_set_init(&dbs_data->attr_set, &policy_dbs->list);
ret = gov->init(dbs_data, !policy->governor->initialized);
ret = gov->init(dbs_data);
if (ret)
goto free_policy_dbs_info;
@ -458,13 +447,13 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
goto out;
/* Failure, so roll back. */
pr_err("cpufreq: Governor initialization failed (dbs_data kobject init error %d)\n", ret);
pr_err("initialization failed (dbs_data kobject init error %d)\n", ret);
policy->governor_data = NULL;
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, !policy->governor->initialized);
gov->exit(dbs_data);
kfree(dbs_data);
free_policy_dbs_info:
@ -474,8 +463,9 @@ out:
mutex_unlock(&gov_dbs_data_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_init);
static int cpufreq_governor_exit(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@ -493,17 +483,17 @@ static int cpufreq_governor_exit(struct cpufreq_policy *policy)
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, policy->governor->initialized == 1);
gov->exit(dbs_data);
kfree(dbs_data);
}
free_policy_dbs_info(policy_dbs, gov);
mutex_unlock(&gov_dbs_data_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_exit);
static int cpufreq_governor_start(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@ -539,47 +529,28 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
gov_set_update_util(policy_dbs, sampling_rate);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_start);
static int cpufreq_governor_stop(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy)
{
gov_cancel_work(policy);
return 0;
}
struct policy_dbs_info *policy_dbs = policy->governor_data;
static int cpufreq_governor_limits(struct cpufreq_policy *policy)
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_stop);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
mutex_lock(&policy_dbs->timer_mutex);
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
cpufreq_policy_apply_limits(policy);
gov_update_sample_delay(policy_dbs, 0);
mutex_unlock(&policy_dbs->timer_mutex);
return 0;
}
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event)
{
if (event == CPUFREQ_GOV_POLICY_INIT) {
return cpufreq_governor_init(policy);
} else if (policy->governor_data) {
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
return cpufreq_governor_exit(policy);
case CPUFREQ_GOV_START:
return cpufreq_governor_start(policy);
case CPUFREQ_GOV_STOP:
return cpufreq_governor_stop(policy);
case CPUFREQ_GOV_LIMITS:
return cpufreq_governor_limits(policy);
}
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(cpufreq_governor_dbs);
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_limits);

24
drivers/cpufreq/cpufreq_governor.h
View file

@ -138,8 +138,8 @@ struct dbs_governor {
unsigned int (*gov_dbs_timer)(struct cpufreq_policy *policy);
struct policy_dbs_info *(*alloc)(void);
void (*free)(struct policy_dbs_info *policy_dbs);
int (*init)(struct dbs_data *dbs_data, bool notify);
void (*exit)(struct dbs_data *dbs_data, bool notify);
int (*init)(struct dbs_data *dbs_data);
void (*exit)(struct dbs_data *dbs_data);
void (*start)(struct cpufreq_policy *policy);
};
@ -148,6 +148,25 @@ static inline struct dbs_governor *dbs_governor_of(struct cpufreq_policy *policy
return container_of(policy->governor, struct dbs_governor, gov);
}
/* Governor callback routines */
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy);
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy);
#define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \
{ \
.name = _name_, \
.max_transition_latency = TRANSITION_LATENCY_LIMIT, \
.owner = THIS_MODULE, \
.init = cpufreq_dbs_governor_init, \
.exit = cpufreq_dbs_governor_exit, \
.start = cpufreq_dbs_governor_start, \
.stop = cpufreq_dbs_governor_stop, \
.limits = cpufreq_dbs_governor_limits, \
}
/* Governor specific operations */
struct od_ops {
unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy,
@ -155,7 +174,6 @@ struct od_ops {
};
unsigned int dbs_update(struct cpufreq_policy *policy);
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
void od_register_powersave_bias_handler(unsigned int (*f)
(struct cpufreq_policy *, unsigned int, unsigned int),
unsigned int powersave_bias);

38
drivers/cpufreq/cpufreq_ondemand.c
View file

@ -65,34 +65,30 @@ static unsigned int generic_powersave_bias_target(struct cpufreq_policy *policy,
{
unsigned int freq_req, freq_reduc, freq_avg;
unsigned int freq_hi, freq_lo;
unsigned int index = 0;
unsigned int index;
unsigned int delay_hi_us;
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy_dbs);
struct dbs_data *dbs_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
struct cpufreq_frequency_table *freq_table = policy->freq_table;
if (!dbs_info->freq_table) {
if (!freq_table) {
dbs_info->freq_lo = 0;
dbs_info->freq_lo_delay_us = 0;
return freq_next;
}
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_next,
relation, &index);
freq_req = dbs_info->freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy, freq_next, relation);
freq_req = freq_table[index].frequency;
freq_reduc = freq_req * od_tuners->powersave_bias / 1000;
freq_avg = freq_req - freq_reduc;
/* Find freq bounds for freq_avg in freq_table */
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_H, &index);
freq_lo = dbs_info->freq_table[index].frequency;
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_L, &index);
freq_hi = dbs_info->freq_table[index].frequency;
index = cpufreq_table_find_index_h(policy, freq_avg);
freq_lo = freq_table[index].frequency;
index = cpufreq_table_find_index_l(policy, freq_avg);
freq_hi = freq_table[index].frequency;
/* Find out how long we have to be in hi and lo freqs */
if (freq_hi == freq_lo) {
@ -113,7 +109,6 @@ static void ondemand_powersave_bias_init(struct cpufreq_policy *policy)
{
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
dbs_info->freq_table = cpufreq_frequency_get_table(policy->cpu);
dbs_info->freq_lo = 0;
}
@ -361,17 +356,15 @@ static void od_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int od_init(struct dbs_data *dbs_data, bool notify)
static int od_init(struct dbs_data *dbs_data)
{
struct od_dbs_tuners *tuners;
u64 idle_time;
int cpu;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
cpu = get_cpu();
idle_time = get_cpu_idle_time_us(cpu, NULL);
@ -402,7 +395,7 @@ static int od_init(struct dbs_data *dbs_data, bool notify)
return 0;
}
static void od_exit(struct dbs_data *dbs_data, bool notify)
static void od_exit(struct dbs_data *dbs_data)
{
kfree(dbs_data->tuners);
}
@ -420,12 +413,7 @@ static struct od_ops od_ops = {
};
static struct dbs_governor od_dbs_gov = {
.gov = {
.name = "ondemand",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
},
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("ondemand"),
.kobj_type = { .default_attrs = od_attributes },
.gov_dbs_timer = od_dbs_timer,
.alloc = od_alloc,

1
drivers/cpufreq/cpufreq_ondemand.h
View file

@ -13,7 +13,6 @@
struct od_policy_dbs_info {
struct policy_dbs_info policy_dbs;
struct cpufreq_frequency_table *freq_table;
unsigned int freq_lo;
unsigned int freq_lo_delay_us;
unsigned int freq_hi_delay_us;

19
drivers/cpufreq/cpufreq_performance.c
View file

@ -16,27 +16,16 @@
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_performance(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_gov_performance_limits(struct cpufreq_policy *policy)
{
switch (event) {
case CPUFREQ_GOV_START:
case CPUFREQ_GOV_LIMITS:
pr_debug("setting to %u kHz because of event %u\n",
policy->max, event);
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
break;
default:
break;
}
return 0;
pr_debug("setting to %u kHz\n", policy->max);
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
}
static struct cpufreq_governor cpufreq_gov_performance = {
.name = "performance",
.governor = cpufreq_governor_performance,
.owner = THIS_MODULE,
.limits = cpufreq_gov_performance_limits,
};
static int __init cpufreq_gov_performance_init(void)

19
drivers/cpufreq/cpufreq_powersave.c
View file

@ -16,26 +16,15 @@
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
{
switch (event) {
case CPUFREQ_GOV_START:
case CPUFREQ_GOV_LIMITS:
pr_debug("setting to %u kHz because of event %u\n",
policy->min, event);
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
break;
default:
break;
}
return 0;
pr_debug("setting to %u kHz\n", policy->min);
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
}
static struct cpufreq_governor cpufreq_gov_powersave = {
.name = "powersave",
.governor = cpufreq_governor_powersave,
.limits = cpufreq_gov_powersave_limits,
.owner = THIS_MODULE,
};

157
drivers/cpufreq/cpufreq_stats.c
View file

@ -15,7 +15,7 @@
#include <linux/slab.h>
#include <linux/cputime.h>
static spinlock_t cpufreq_stats_lock;
static DEFINE_SPINLOCK(cpufreq_stats_lock);
struct cpufreq_stats {
unsigned int total_trans;
@ -52,6 +52,9 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
ssize_t len = 0;
int i;
if (policy->fast_switch_enabled)
return 0;
cpufreq_stats_update(stats);
for (i = 0; i < stats->state_num; i++) {
len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
@ -68,6 +71,9 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
ssize_t len = 0;
int i, j;
if (policy->fast_switch_enabled)
return 0;
len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n");
len += snprintf(buf + len, PAGE_SIZE - len, " : ");
for (i = 0; i < stats->state_num; i++) {
@ -130,7 +136,7 @@ static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)
return -1;
}
static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
void cpufreq_stats_free_table(struct cpufreq_policy *policy)
{
struct cpufreq_stats *stats = policy->stats;
@ -146,39 +152,25 @@ static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
policy->stats = NULL;
}
static void cpufreq_stats_free_table(unsigned int cpu)
{
struct cpufreq_policy *policy;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return;
__cpufreq_stats_free_table(policy);
cpufreq_cpu_put(policy);
}
static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
void cpufreq_stats_create_table(struct cpufreq_policy *policy)
{
unsigned int i = 0, count = 0, ret = -ENOMEM;
struct cpufreq_stats *stats;
unsigned int alloc_size;
unsigned int cpu = policy->cpu;
struct cpufreq_frequency_table *pos, *table;
/* We need cpufreq table for creating stats table */
table = cpufreq_frequency_get_table(cpu);
table = policy->freq_table;
if (unlikely(!table))
return 0;
return;
/* stats already initialized */
if (policy->stats)
return -EEXIST;
return;
stats = kzalloc(sizeof(*stats), GFP_KERNEL);
if (!stats)
return -ENOMEM;
return;
/* Find total allocation size */
cpufreq_for_each_valid_entry(pos, table)
@ -215,80 +207,32 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
policy->stats = stats;
ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
if (!ret)
return 0;
return;
/* We failed, release resources */
policy->stats = NULL;
kfree(stats->time_in_state);
free_stat:
kfree(stats);
return ret;
}
static void cpufreq_stats_create_table(unsigned int cpu)
void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
unsigned int new_freq)
{
struct cpufreq_policy *policy;
/*
* "likely(!policy)" because normally cpufreq_stats will be registered
* before cpufreq driver
*/
policy = cpufreq_cpu_get(cpu);
if (likely(!policy))
return;
__cpufreq_stats_create_table(policy);
cpufreq_cpu_put(policy);
}
static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
unsigned long val, void *data)
{
int ret = 0;
struct cpufreq_policy *policy = data;
if (val == CPUFREQ_CREATE_POLICY)
ret = __cpufreq_stats_create_table(policy);
else if (val == CPUFREQ_REMOVE_POLICY)
__cpufreq_stats_free_table(policy);
return ret;
}
static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
unsigned long val, void *data)
{
struct cpufreq_freqs *freq = data;
struct cpufreq_policy *policy = cpufreq_cpu_get(freq->cpu);
struct cpufreq_stats *stats;
struct cpufreq_stats *stats = policy->stats;
int old_index, new_index;
if (!policy) {
pr_err("%s: No policy found\n", __func__);
return 0;
}
if (val != CPUFREQ_POSTCHANGE)
goto put_policy;
if (!policy->stats) {
if (!stats) {
pr_debug("%s: No stats found\n", __func__);
goto put_policy;
return;
}
stats = policy->stats;
old_index = stats->last_index;
new_index = freq_table_get_index(stats, freq->new);
new_index = freq_table_get_index(stats, new_freq);
/* We can't do stats->time_in_state[-1]= .. */
if (old_index == -1 || new_index == -1)
goto put_policy;
if (old_index == new_index)
goto put_policy;
if (old_index == -1 || new_index == -1 || old_index == new_index)
return;
cpufreq_stats_update(stats);
@ -297,61 +241,4 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
stats->trans_table[old_index * stats->max_state + new_index]++;
#endif
stats->total_trans++;
put_policy:
cpufreq_cpu_put(policy);
return 0;
}
static struct notifier_block notifier_policy_block = {
.notifier_call = cpufreq_stat_notifier_policy
};
static struct notifier_block notifier_trans_block = {
.notifier_call = cpufreq_stat_notifier_trans
};
static int __init cpufreq_stats_init(void)
{
int ret;
unsigned int cpu;
spin_lock_init(&cpufreq_stats_lock);
ret = cpufreq_register_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
if (ret)
return ret;
for_each_online_cpu(cpu)
cpufreq_stats_create_table(cpu);
ret = cpufreq_register_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);
if (ret) {
cpufreq_unregister_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
for_each_online_cpu(cpu)
cpufreq_stats_free_table(cpu);
return ret;
}
return 0;
}
static void __exit cpufreq_stats_exit(void)
{
unsigned int cpu;
cpufreq_unregister_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
cpufreq_unregister_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);
for_each_online_cpu(cpu)
cpufreq_stats_free_table(cpu);
}
MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>");
MODULE_DESCRIPTION("Export cpufreq stats via sysfs");
MODULE_LICENSE("GPL");
module_init(cpufreq_stats_init);
module_exit(cpufreq_stats_exit);

96
drivers/cpufreq/cpufreq_userspace.c
View file

@ -65,66 +65,66 @@ static int cpufreq_userspace_policy_init(struct cpufreq_policy *policy)
return 0;
}
static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_userspace_policy_exit(struct cpufreq_policy *policy)
{
mutex_lock(&userspace_mutex);
kfree(policy->governor_data);
policy->governor_data = NULL;
mutex_unlock(&userspace_mutex);
}
static int cpufreq_userspace_policy_start(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
unsigned int cpu = policy->cpu;
int rc = 0;
if (event == CPUFREQ_GOV_POLICY_INIT)
return cpufreq_userspace_policy_init(policy);
BUG_ON(!policy->cur);
pr_debug("started managing cpu %u\n", policy->cpu);
if (!setspeed)
return -EINVAL;
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, policy->cpu) = 1;
*setspeed = policy->cur;
mutex_unlock(&userspace_mutex);
return 0;
}
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
mutex_lock(&userspace_mutex);
policy->governor_data = NULL;
kfree(setspeed);
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_START:
BUG_ON(!policy->cur);
pr_debug("started managing cpu %u\n", cpu);
static void cpufreq_userspace_policy_stop(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 1;
*setspeed = policy->cur;
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_STOP:
pr_debug("managing cpu %u stopped\n", cpu);
pr_debug("managing cpu %u stopped\n", policy->cpu);
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 0;
*setspeed = 0;
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_LIMITS:
mutex_lock(&userspace_mutex);
pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",
cpu, policy->min, policy->max, policy->cur, *setspeed);
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, policy->cpu) = 0;
*setspeed = 0;
mutex_unlock(&userspace_mutex);
}
if (policy->max < *setspeed)
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
else if (policy->min > *setspeed)
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
else
__cpufreq_driver_target(policy, *setspeed,
CPUFREQ_RELATION_L);
mutex_unlock(&userspace_mutex);
break;
}
return rc;
static void cpufreq_userspace_policy_limits(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
mutex_lock(&userspace_mutex);
pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",
policy->cpu, policy->min, policy->max, policy->cur, *setspeed);
if (policy->max < *setspeed)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > *setspeed)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
else
__cpufreq_driver_target(policy, *setspeed, CPUFREQ_RELATION_L);
mutex_unlock(&userspace_mutex);
}
static struct cpufreq_governor cpufreq_gov_userspace = {
.name = "userspace",
.governor = cpufreq_governor_userspace,
.init = cpufreq_userspace_policy_init,
.exit = cpufreq_userspace_policy_exit,
.start = cpufreq_userspace_policy_start,
.stop = cpufreq_userspace_policy_stop,
.limits = cpufreq_userspace_policy_limits,
.store_setspeed = cpufreq_set,
.show_setspeed = show_speed,
.owner = THIS_MODULE,

22
drivers/cpufreq/davinci-cpufreq.c
View file

@ -38,26 +38,6 @@ struct davinci_cpufreq {
};
static struct davinci_cpufreq cpufreq;
static int davinci_verify_speed(struct cpufreq_policy *policy)
{
struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
struct cpufreq_frequency_table *freq_table = pdata->freq_table;
struct clk *armclk = cpufreq.armclk;
if (freq_table)
return cpufreq_frequency_table_verify(policy, freq_table);
if (policy->cpu)
return -EINVAL;
cpufreq_verify_within_cpu_limits(policy);
policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
policy->cpuinfo.max_freq);
return 0;
}
static int davinci_target(struct cpufreq_policy *policy, unsigned int idx)
{
struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
@ -121,7 +101,7 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
static struct cpufreq_driver davinci_driver = {
.flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = davinci_verify_speed,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = davinci_target,
.get = cpufreq_generic_get,
.init = davinci_cpu_init,

106
drivers/cpufreq/freq_table.c
View file

@ -63,8 +63,6 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
else
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table)
@ -108,20 +106,16 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
*/
int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
{
struct cpufreq_frequency_table *table =
cpufreq_frequency_get_table(policy->cpu);
if (!table)
if (!policy->freq_table)
return -ENODEV;
return cpufreq_frequency_table_verify(policy, table);
return cpufreq_frequency_table_verify(policy, policy->freq_table);
}
EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int target_freq,
unsigned int relation,
unsigned int *index)
int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_frequency_table optimal = {
.driver_data = ~0,
@ -132,7 +126,9 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
.frequency = 0,
};
struct cpufreq_frequency_table *pos;
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq, diff, i = 0;
int index;
pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
target_freq, relation, policy->cpu);
@ -196,25 +192,26 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
}
}
if (optimal.driver_data > i) {
if (suboptimal.driver_data > i)
return -EINVAL;
*index = suboptimal.driver_data;
if (suboptimal.driver_data > i) {
WARN(1, "Invalid frequency table: %d\n", policy->cpu);
return 0;
}
index = suboptimal.driver_data;
} else
*index = optimal.driver_data;
index = optimal.driver_data;
pr_debug("target index is %u, freq is:%u kHz\n", *index,
table[*index].frequency);
return 0;
pr_debug("target index is %u, freq is:%u kHz\n", index,
table[index].frequency);
return index;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
EXPORT_SYMBOL_GPL(cpufreq_table_index_unsorted);
int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
unsigned int freq)
{
struct cpufreq_frequency_table *pos, *table;
struct cpufreq_frequency_table *pos, *table = policy->freq_table;
table = cpufreq_frequency_get_table(policy->cpu);
if (unlikely(!table)) {
pr_debug("%s: Unable to find frequency table\n", __func__);
return -ENOENT;
@ -300,15 +297,72 @@ struct freq_attr *cpufreq_generic_attr[] = {
};
EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
static int set_freq_table_sorted(struct cpufreq_policy *policy)
{
struct cpufreq_frequency_table *pos, *table = policy->freq_table;
struct cpufreq_frequency_table *prev = NULL;
int ascending = 0;
policy->freq_table_sorted = CPUFREQ_TABLE_UNSORTED;
cpufreq_for_each_valid_entry(pos, table) {
if (!prev) {
prev = pos;
continue;
}
if (pos->frequency == prev->frequency) {
pr_warn("Duplicate freq-table entries: %u\n",
pos->frequency);
return -EINVAL;
}
/* Frequency increased from prev to pos */
if (pos->frequency > prev->frequency) {
/* But frequency was decreasing earlier */
if (ascending < 0) {
pr_debug("Freq table is unsorted\n");
return 0;
}
ascending++;
} else {
/* Frequency decreased from prev to pos */
/* But frequency was increasing earlier */
if (ascending > 0) {
pr_debug("Freq table is unsorted\n");
return 0;
}
ascending--;
}
prev = pos;
}
if (ascending > 0)
policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_ASCENDING;
else
policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_DESCENDING;
pr_debug("Freq table is sorted in %s order\n",
ascending > 0 ? "ascending" : "descending");
return 0;
}
int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table)
{
int ret = cpufreq_frequency_table_cpuinfo(policy, table);
int ret;
if (!ret)
policy->freq_table = table;
ret = cpufreq_frequency_table_cpuinfo(policy, table);
if (ret)
return ret;
return ret;
policy->freq_table = table;
return set_freq_table_sorted(policy);
}
EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show);

70
drivers/cpufreq/intel_pstate.c
View file

@ -97,7 +97,6 @@ static inline u64 div_ext_fp(u64 x, u64 y)
* read from MPERF MSR between last and current sample
* @tsc: Difference of time stamp counter between last and
* current sample
* @freq: Effective frequency calculated from APERF/MPERF
* @time: Current time from scheduler
*
* This structure is used in the cpudata structure to store performance sample
@ -109,7 +108,6 @@ struct sample {
u64 aperf;
u64 mperf;
u64 tsc;
int freq;
u64 time;
};
@ -282,9 +280,9 @@ struct cpu_defaults {
static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu);
static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu);
static struct pstate_adjust_policy pid_params;
static struct pstate_funcs pstate_funcs;
static int hwp_active;
static struct pstate_adjust_policy pid_params __read_mostly;
static struct pstate_funcs pstate_funcs __read_mostly;
static int hwp_active __read_mostly;
#ifdef CONFIG_ACPI
static bool acpi_ppc;
@ -808,7 +806,8 @@ static void __init intel_pstate_sysfs_expose_params(void)
static void intel_pstate_hwp_enable(struct cpudata *cpudata)
{
/* First disable HWP notification interrupt as we don't process them */
wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
if (static_cpu_has(X86_FEATURE_HWP_NOTIFY))
wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
}
@ -945,7 +944,7 @@ static int core_get_max_pstate(void)
if (err)
goto skip_tar;
tdp_msr = MSR_CONFIG_TDP_NOMINAL + tdp_ctrl;
tdp_msr = MSR_CONFIG_TDP_NOMINAL + (tdp_ctrl & 0x3);
err = rdmsrl_safe(tdp_msr, &tdp_ratio);
if (err)
goto skip_tar;
@ -1092,6 +1091,26 @@ static struct cpu_defaults knl_params = {
},
};
static struct cpu_defaults bxt_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 60,
.p_gain_pct = 14,
.d_gain_pct = 0,
.i_gain_pct = 4,
},
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = core_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.get_target_pstate = get_target_pstate_use_cpu_load,
},
};
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
{
int max_perf = cpu->pstate.turbo_pstate;
@ -1114,17 +1133,12 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);
}
static inline void intel_pstate_record_pstate(struct cpudata *cpu, int pstate)
{
trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu);
cpu->pstate.current_pstate = pstate;
}
static void intel_pstate_set_min_pstate(struct cpudata *cpu)
{
int pstate = cpu->pstate.min_pstate;
intel_pstate_record_pstate(cpu, pstate);
trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu);
cpu->pstate.current_pstate = pstate;
/*
* Generally, there is no guarantee that this code will always run on
* the CPU being updated, so force the register update to run on the
@ -1284,10 +1298,11 @@ static inline void intel_pstate_update_pstate(struct cpudata *cpu, int pstate)
intel_pstate_get_min_max(cpu, &min_perf, &max_perf);
pstate = clamp_t(int, pstate, min_perf, max_perf);
trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu);
if (pstate == cpu->pstate.current_pstate)
return;
intel_pstate_record_pstate(cpu, pstate);
cpu->pstate.current_pstate = pstate;
wrmsrl(MSR_IA32_PERF_CTL, pstate_funcs.get_val(cpu, pstate));
}
@ -1352,11 +1367,12 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
ICPU(INTEL_FAM6_SKYLAKE_DESKTOP, core_params),
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_params),
ICPU(INTEL_FAM6_XEON_PHI_KNL, knl_params),
ICPU(INTEL_FAM6_ATOM_GOLDMONT, bxt_params),
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] = {
static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_params),
{}
};
@ -1576,12 +1592,12 @@ static struct cpufreq_driver intel_pstate_driver = {
.name = "intel_pstate",
};
static int __initdata no_load;
static int __initdata no_hwp;
static int __initdata hwp_only;
static unsigned int force_load;
static int no_load __initdata;
static int no_hwp __initdata;
static int hwp_only __initdata;
static unsigned int force_load __initdata;
static int intel_pstate_msrs_not_valid(void)
static int __init intel_pstate_msrs_not_valid(void)
{
if (!pstate_funcs.get_max() ||
!pstate_funcs.get_min() ||
@ -1591,7 +1607,7 @@ static int intel_pstate_msrs_not_valid(void)
return 0;
}
static void copy_pid_params(struct pstate_adjust_policy *policy)
static void __init copy_pid_params(struct pstate_adjust_policy *policy)
{
pid_params.sample_rate_ms = policy->sample_rate_ms;
pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
@ -1602,7 +1618,7 @@ static void copy_pid_params(struct pstate_adjust_policy *policy)
pid_params.setpoint = policy->setpoint;
}
static void copy_cpu_funcs(struct pstate_funcs *funcs)
static void __init copy_cpu_funcs(struct pstate_funcs *funcs)
{
pstate_funcs.get_max = funcs->get_max;
pstate_funcs.get_max_physical = funcs->get_max_physical;
@ -1617,7 +1633,7 @@ static void copy_cpu_funcs(struct pstate_funcs *funcs)
#ifdef CONFIG_ACPI
static bool intel_pstate_no_acpi_pss(void)
static bool __init intel_pstate_no_acpi_pss(void)
{
int i;
@ -1646,7 +1662,7 @@ static bool intel_pstate_no_acpi_pss(void)
return true;
}
static bool intel_pstate_has_acpi_ppc(void)
static bool __init intel_pstate_has_acpi_ppc(void)
{
int i;
@ -1674,7 +1690,7 @@ struct hw_vendor_info {
};
/* Hardware vendor-specific info that has its own power management modes */
static struct hw_vendor_info vendor_info[] = {
static struct hw_vendor_info vendor_info[] __initdata = {
{1, "HP ", "ProLiant", PSS},
{1, "ORACLE", "X4-2 ", PPC},
{1, "ORACLE", "X4-2L ", PPC},
@ -1693,7 +1709,7 @@ static struct hw_vendor_info vendor_info[] = {
{0, "", ""},
};
static bool intel_pstate_platform_pwr_mgmt_exists(void)
static bool __init intel_pstate_platform_pwr_mgmt_exists(void)
{
struct acpi_table_header hdr;
struct hw_vendor_info *v_info;

2
drivers/cpufreq/mvebu-cpufreq.c
View file

@ -70,7 +70,7 @@ static int __init armada_xp_pmsu_cpufreq_init(void)
continue;
}
clk = clk_get(cpu_dev, 0);
clk = clk_get(cpu_dev, NULL);
if (IS_ERR(clk)) {
pr_err("Cannot get clock for CPU %d\n", cpu);
return PTR_ERR(clk);

2
drivers/cpufreq/pcc-cpufreq.c
View file

@ -555,8 +555,6 @@ static int pcc_cpufreq_cpu_init(struct cpufreq_policy *policy)
policy->min = policy->cpuinfo.min_freq =
ioread32(&pcch_hdr->minimum_frequency) * 1000;
policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
pr_debug("init: policy->max is %d, policy->min is %d\n",
policy->max, policy->min);
out:

181
drivers/cpufreq/powernv-cpufreq.c
View file

@ -64,12 +64,14 @@
/**
* struct global_pstate_info - Per policy data structure to maintain history of
* global pstates
* @highest_lpstate: The local pstate from which we are ramping down
* @highest_lpstate_idx: The local pstate index from which we are
* ramping down
* @elapsed_time: Time in ms spent in ramping down from
* highest_lpstate
* highest_lpstate_idx
* @last_sampled_time: Time from boot in ms when global pstates were
* last set
* @last_lpstate,last_gpstate: Last set values for local and global pstates
* @last_lpstate_idx, Last set value of local pstate and global
* last_gpstate_idx pstate in terms of cpufreq table index
* @timer: Is used for ramping down if cpu goes idle for
* a long time with global pstate held high
* @gpstate_lock: A spinlock to maintain synchronization between
@ -77,11 +79,11 @@
* governer's target_index calls
*/
struct global_pstate_info {
int highest_lpstate;
int highest_lpstate_idx;
unsigned int elapsed_time;
unsigned int last_sampled_time;
int last_lpstate;
int last_gpstate;
int last_lpstate_idx;
int last_gpstate_idx;
spinlock_t gpstate_lock;
struct timer_list timer;
};
@ -124,29 +126,47 @@ static int nr_chips;
static DEFINE_PER_CPU(struct chip *, chip_info);
/*
* Note: The set of pstates consists of contiguous integers, the
* smallest of which is indicated by powernv_pstate_info.min, the
* largest of which is indicated by powernv_pstate_info.max.
* Note:
* The set of pstates consists of contiguous integers.
* powernv_pstate_info stores the index of the frequency table for
* max, min and nominal frequencies. It also stores number of
* available frequencies.
*
* The nominal pstate is the highest non-turbo pstate in this
* platform. This is indicated by powernv_pstate_info.nominal.
* powernv_pstate_info.nominal indicates the index to the highest
* non-turbo frequency.
*/
static struct powernv_pstate_info {
int min;
int max;
int nominal;
int nr_pstates;
unsigned int min;
unsigned int max;
unsigned int nominal;
unsigned int nr_pstates;
} powernv_pstate_info;
/* Use following macros for conversions between pstate_id and index */
static inline int idx_to_pstate(unsigned int i)
{
return powernv_freqs[i].driver_data;
}
static inline unsigned int pstate_to_idx(int pstate)
{
/*
* abs() is deliberately used so that is works with
* both monotonically increasing and decreasing
* pstate values
*/
return abs(pstate - idx_to_pstate(powernv_pstate_info.max));
}
static inline void reset_gpstates(struct cpufreq_policy *policy)
{
struct global_pstate_info *gpstates = policy->driver_data;
gpstates->highest_lpstate = 0;
gpstates->highest_lpstate_idx = 0;
gpstates->elapsed_time = 0;
gpstates->last_sampled_time = 0;
gpstates->last_lpstate = 0;
gpstates->last_gpstate = 0;
gpstates->last_lpstate_idx = 0;
gpstates->last_gpstate_idx = 0;
}
/*
@ -156,9 +176,10 @@ static inline void reset_gpstates(struct cpufreq_policy *policy)
static int init_powernv_pstates(void)
{
struct device_node *power_mgt;
int i, pstate_min, pstate_max, pstate_nominal, nr_pstates = 0;
int i, nr_pstates = 0;
const __be32 *pstate_ids, *pstate_freqs;
u32 len_ids, len_freqs;
u32 pstate_min, pstate_max, pstate_nominal;
power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
if (!power_mgt) {
@ -208,6 +229,7 @@ static int init_powernv_pstates(void)
return -ENODEV;
}
powernv_pstate_info.nr_pstates = nr_pstates;
pr_debug("NR PStates %d\n", nr_pstates);
for (i = 0; i < nr_pstates; i++) {
u32 id = be32_to_cpu(pstate_ids[i]);
@ -216,15 +238,17 @@ static int init_powernv_pstates(void)
pr_debug("PState id %d freq %d MHz\n", id, freq);
powernv_freqs[i].frequency = freq * 1000; /* kHz */
powernv_freqs[i].driver_data = id;
if (id == pstate_max)
powernv_pstate_info.max = i;
else if (id == pstate_nominal)
powernv_pstate_info.nominal = i;
else if (id == pstate_min)
powernv_pstate_info.min = i;
}
/* End of list marker entry */
powernv_freqs[i].frequency = CPUFREQ_TABLE_END;
powernv_pstate_info.min = pstate_min;
powernv_pstate_info.max = pstate_max;
powernv_pstate_info.nominal = pstate_nominal;
powernv_pstate_info.nr_pstates = nr_pstates;
return 0;
}
@ -233,12 +257,12 @@ static unsigned int pstate_id_to_freq(int pstate_id)
{
int i;
i = powernv_pstate_info.max - pstate_id;
i = pstate_to_idx(pstate_id);
if (i >= powernv_pstate_info.nr_pstates || i < 0) {
pr_warn("PState id %d outside of PState table, "
"reporting nominal id %d instead\n",
pstate_id, powernv_pstate_info.nominal);
i = powernv_pstate_info.max - powernv_pstate_info.nominal;
pstate_id, idx_to_pstate(powernv_pstate_info.nominal));
i = powernv_pstate_info.nominal;
}
return powernv_freqs[i].frequency;
@ -252,7 +276,7 @@ static ssize_t cpuinfo_nominal_freq_show(struct cpufreq_policy *policy,
char *buf)
{
return sprintf(buf, "%u\n",
pstate_id_to_freq(powernv_pstate_info.nominal));
powernv_freqs[powernv_pstate_info.nominal].frequency);
}
struct freq_attr cpufreq_freq_attr_cpuinfo_nominal_freq =
@ -426,7 +450,7 @@ static void set_pstate(void *data)
*/
static inline unsigned int get_nominal_index(void)
{
return powernv_pstate_info.max - powernv_pstate_info.nominal;
return powernv_pstate_info.nominal;
}
static void powernv_cpufreq_throttle_check(void *data)
@ -435,20 +459,22 @@ static void powernv_cpufreq_throttle_check(void *data)
unsigned int cpu = smp_processor_id();
unsigned long pmsr;
int pmsr_pmax;
unsigned int pmsr_pmax_idx;
pmsr = get_pmspr(SPRN_PMSR);
chip = this_cpu_read(chip_info);
/* Check for Pmax Capping */
pmsr_pmax = (s8)PMSR_MAX(pmsr);
if (pmsr_pmax != powernv_pstate_info.max) {
pmsr_pmax_idx = pstate_to_idx(pmsr_pmax);
if (pmsr_pmax_idx != powernv_pstate_info.max) {
if (chip->throttled)
goto next;
chip->throttled = true;
if (pmsr_pmax < powernv_pstate_info.nominal) {
pr_warn_once("CPU %d on Chip %u has Pmax reduced below nominal frequency (%d < %d)\n",
if (pmsr_pmax_idx > powernv_pstate_info.nominal) {
pr_warn_once("CPU %d on Chip %u has Pmax(%d) reduced below nominal frequency(%d)\n",
cpu, chip->id, pmsr_pmax,
powernv_pstate_info.nominal);
idx_to_pstate(powernv_pstate_info.nominal));
chip->throttle_sub_turbo++;
} else {
chip->throttle_turbo++;
@ -484,34 +510,35 @@ next:
/**
* calc_global_pstate - Calculate global pstate
* @elapsed_time: Elapsed time in milliseconds
* @local_pstate: New local pstate
* @highest_lpstate: pstate from which its ramping down
* @elapsed_time: Elapsed time in milliseconds
* @local_pstate_idx: New local pstate
* @highest_lpstate_idx: pstate from which its ramping down
*
* Finds the appropriate global pstate based on the pstate from which its
* ramping down and the time elapsed in ramping down. It follows a quadratic
* equation which ensures that it reaches ramping down to pmin in 5sec.
*/
static inline int calc_global_pstate(unsigned int elapsed_time,
int highest_lpstate, int local_pstate)
int highest_lpstate_idx,
int local_pstate_idx)
{
int pstate_diff;
int index_diff;
/*
* Using ramp_down_percent we get the percentage of rampdown
* that we are expecting to be dropping. Difference between
* highest_lpstate and powernv_pstate_info.min will give a absolute
* highest_lpstate_idx and powernv_pstate_info.min will give a absolute
* number of how many pstates we will drop eventually by the end of
* 5 seconds, then just scale it get the number pstates to be dropped.
*/
pstate_diff = ((int)ramp_down_percent(elapsed_time) *
(highest_lpstate - powernv_pstate_info.min)) / 100;
index_diff = ((int)ramp_down_percent(elapsed_time) *
(powernv_pstate_info.min - highest_lpstate_idx)) / 100;
/* Ensure that global pstate is >= to local pstate */
if (highest_lpstate - pstate_diff < local_pstate)
return local_pstate;
if (highest_lpstate_idx + index_diff >= local_pstate_idx)
return local_pstate_idx;
else
return highest_lpstate - pstate_diff;
return highest_lpstate_idx + index_diff;
}
static inline void queue_gpstate_timer(struct global_pstate_info *gpstates)
@ -547,7 +574,7 @@ void gpstate_timer_handler(unsigned long data)
{
struct cpufreq_policy *policy = (struct cpufreq_policy *)data;
struct global_pstate_info *gpstates = policy->driver_data;
int gpstate_id;
int gpstate_idx;
unsigned int time_diff = jiffies_to_msecs(jiffies)
- gpstates->last_sampled_time;
struct powernv_smp_call_data freq_data;
@ -557,29 +584,29 @@ void gpstate_timer_handler(unsigned long data)
gpstates->last_sampled_time += time_diff;
gpstates->elapsed_time += time_diff;
freq_data.pstate_id = gpstates->last_lpstate;
freq_data.pstate_id = idx_to_pstate(gpstates->last_lpstate_idx);
if ((gpstates->last_gpstate == freq_data.pstate_id) ||
if ((gpstates->last_gpstate_idx == gpstates->last_lpstate_idx) ||
(gpstates->elapsed_time > MAX_RAMP_DOWN_TIME)) {
gpstate_id = freq_data.pstate_id;
gpstate_idx = pstate_to_idx(freq_data.pstate_id);
reset_gpstates(policy);
gpstates->highest_lpstate = freq_data.pstate_id;
gpstates->highest_lpstate_idx = gpstate_idx;
} else {
gpstate_id = calc_global_pstate(gpstates->elapsed_time,
gpstates->highest_lpstate,
freq_data.pstate_id);
gpstate_idx = calc_global_pstate(gpstates->elapsed_time,
gpstates->highest_lpstate_idx,
freq_data.pstate_id);
}
/*
* If local pstate is equal to global pstate, rampdown is over
* So timer is not required to be queued.
*/
if (gpstate_id != freq_data.pstate_id)
if (gpstate_idx != gpstates->last_lpstate_idx)
queue_gpstate_timer(gpstates);
freq_data.gpstate_id = gpstate_id;
gpstates->last_gpstate = freq_data.gpstate_id;
gpstates->last_lpstate = freq_data.pstate_id;
freq_data.gpstate_id = idx_to_pstate(gpstate_idx);
gpstates->last_gpstate_idx = pstate_to_idx(freq_data.gpstate_id);
gpstates->last_lpstate_idx = pstate_to_idx(freq_data.pstate_id);
spin_unlock(&gpstates->gpstate_lock);
@ -596,7 +623,7 @@ static int powernv_cpufreq_target_index(struct cpufreq_policy *policy,
unsigned int new_index)
{
struct powernv_smp_call_data freq_data;
unsigned int cur_msec, gpstate_id;
unsigned int cur_msec, gpstate_idx;
struct global_pstate_info *gpstates = policy->driver_data;
if (unlikely(rebooting) && new_index != get_nominal_index())
@ -608,15 +635,15 @@ static int powernv_cpufreq_target_index(struct cpufreq_policy *policy,
cur_msec = jiffies_to_msecs(get_jiffies_64());
spin_lock(&gpstates->gpstate_lock);
freq_data.pstate_id = powernv_freqs[new_index].driver_data;
freq_data.pstate_id = idx_to_pstate(new_index);
if (!gpstates->last_sampled_time) {
gpstate_id = freq_data.pstate_id;
gpstates->highest_lpstate = freq_data.pstate_id;
gpstate_idx = new_index;
gpstates->highest_lpstate_idx = new_index;
goto gpstates_done;
}
if (gpstates->last_gpstate > freq_data.pstate_id) {
if (gpstates->last_gpstate_idx < new_index) {
gpstates->elapsed_time += cur_msec -
gpstates->last_sampled_time;
@ -627,34 +654,34 @@ static int powernv_cpufreq_target_index(struct cpufreq_policy *policy,
*/
if (gpstates->elapsed_time > MAX_RAMP_DOWN_TIME) {
reset_gpstates(policy);
gpstates->highest_lpstate = freq_data.pstate_id;
gpstate_id = freq_data.pstate_id;
gpstates->highest_lpstate_idx = new_index;
gpstate_idx = new_index;
} else {
/* Elaspsed_time is less than 5 seconds, continue to rampdown */
gpstate_id = calc_global_pstate(gpstates->elapsed_time,
gpstates->highest_lpstate,
freq_data.pstate_id);
gpstate_idx = calc_global_pstate(gpstates->elapsed_time,
gpstates->highest_lpstate_idx,
new_index);
}
} else {
reset_gpstates(policy);
gpstates->highest_lpstate = freq_data.pstate_id;
gpstate_id = freq_data.pstate_id;
gpstates->highest_lpstate_idx = new_index;
gpstate_idx = new_index;
}
/*
* If local pstate is equal to global pstate, rampdown is over
* So timer is not required to be queued.
*/
if (gpstate_id != freq_data.pstate_id)
if (gpstate_idx != new_index)
queue_gpstate_timer(gpstates);
else
del_timer_sync(&gpstates->timer);
gpstates_done:
freq_data.gpstate_id = gpstate_id;
freq_data.gpstate_id = idx_to_pstate(gpstate_idx);
gpstates->last_sampled_time = cur_msec;
gpstates->last_gpstate = freq_data.gpstate_id;
gpstates->last_lpstate = freq_data.pstate_id;
gpstates->last_gpstate_idx = gpstate_idx;
gpstates->last_lpstate_idx = new_index;
spin_unlock(&gpstates->gpstate_lock);
@ -760,9 +787,7 @@ void powernv_cpufreq_work_fn(struct work_struct *work)
struct cpufreq_policy policy;
cpufreq_get_policy(&policy, cpu);
cpufreq_frequency_table_target(&policy, policy.freq_table,
policy.cur,
CPUFREQ_RELATION_C, &index);
index = cpufreq_table_find_index_c(&policy, policy.cur);
powernv_cpufreq_target_index(&policy, index);
cpumask_andnot(&mask, &mask, policy.cpus);
}
@ -848,8 +873,8 @@ static void powernv_cpufreq_stop_cpu(struct cpufreq_policy *policy)
struct powernv_smp_call_data freq_data;
struct global_pstate_info *gpstates = policy->driver_data;
freq_data.pstate_id = powernv_pstate_info.min;
freq_data.gpstate_id = powernv_pstate_info.min;
freq_data.pstate_id = idx_to_pstate(powernv_pstate_info.min);
freq_data.gpstate_id = idx_to_pstate(powernv_pstate_info.min);
smp_call_function_single(policy->cpu, set_pstate, &freq_data, 1);
del_timer_sync(&gpstates->timer);
}

3
drivers/cpufreq/ppc_cbe_cpufreq_pmi.c
View file

@ -94,7 +94,7 @@ static int pmi_notifier(struct notifier_block *nb,
unsigned long event, void *data)
{
struct cpufreq_policy *policy = data;
struct cpufreq_frequency_table *cbe_freqs;
struct cpufreq_frequency_table *cbe_freqs = policy->freq_table;
u8 node;
/* Should this really be called for CPUFREQ_ADJUST and CPUFREQ_NOTIFY
@ -103,7 +103,6 @@ static int pmi_notifier(struct notifier_block *nb,
if (event == CPUFREQ_START)
return 0;
cbe_freqs = cpufreq_frequency_get_table(policy->cpu);
node = cbe_cpu_to_node(policy->cpu);
pr_debug("got notified, event=%lu, node=%u\n", event, node);

33
drivers/cpufreq/s3c24xx-cpufreq.c
View file

@ -293,12 +293,8 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
__func__, policy, target_freq, relation);
if (ftab) {
if (cpufreq_frequency_table_target(policy, ftab,
target_freq, relation,
&index)) {
s3c_freq_dbg("%s: table failed\n", __func__);
return -EINVAL;
}
index = cpufreq_frequency_table_target(policy, target_freq,
relation);
s3c_freq_dbg("%s: adjust %d to entry %d (%u)\n", __func__,
target_freq, index, ftab[index].frequency);
@ -315,7 +311,6 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
pll = NULL;
} else {
struct cpufreq_policy tmp_policy;
int ret;
/* we keep the cpu pll table in Hz, to ensure we get an
* accurate value for the PLL output. */
@ -323,20 +318,14 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
tmp_policy.min = policy->min * 1000;
tmp_policy.max = policy->max * 1000;
tmp_policy.cpu = policy->cpu;
tmp_policy.freq_table = pll_reg;
/* cpufreq_frequency_table_target uses a pointer to 'index'
* which is the number of the table entry, not the value of
/* cpufreq_frequency_table_target returns the index
* of the table entry, not the value of
* the table entry's index field. */
ret = cpufreq_frequency_table_target(&tmp_policy, pll_reg,
target_freq, relation,
&index);
if (ret < 0) {
pr_err("%s: no PLL available\n", __func__);
goto err_notpossible;
}
index = cpufreq_frequency_table_target(&tmp_policy, target_freq,
relation);
pll = pll_reg + index;
s3c_freq_dbg("%s: target %u => %u\n",
@ -346,10 +335,6 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
}
return s3c_cpufreq_settarget(policy, target_freq, pll);
err_notpossible:
pr_err("no compatible settings for %d\n", target_freq);
return -EINVAL;
}
struct clk *s3c_cpufreq_clk_get(struct device *dev, const char *name)
@ -571,11 +556,7 @@ static int s3c_cpufreq_build_freq(void)
{
int size, ret;
if (!cpu_cur.info->calc_freqtable)
return -EINVAL;
kfree(ftab);
ftab = NULL;
size = cpu_cur.info->calc_freqtable(&cpu_cur, NULL, 0);
size++;

7
drivers/cpufreq/s5pv210-cpufreq.c
View file

@ -246,12 +246,7 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
new_freq = s5pv210_freq_table[index].frequency;
/* Finding current running level index */
if (cpufreq_frequency_table_target(policy, s5pv210_freq_table,
old_freq, CPUFREQ_RELATION_H,
&priv_index)) {
ret = -EINVAL;
goto exit;
}
priv_index = cpufreq_table_find_index_h(policy, old_freq);
arm_volt = dvs_conf[index].arm_volt;
int_volt = dvs_conf[index].int_volt;

26
drivers/thermal/cpu_cooling.c
View file

@ -787,22 +787,34 @@ __cpufreq_cooling_register(struct device_node *np,
const struct cpumask *clip_cpus, u32 capacitance,
get_static_t plat_static_func)
{
struct cpufreq_policy *policy;
struct thermal_cooling_device *cool_dev;
struct cpufreq_cooling_device *cpufreq_dev;
char dev_name[THERMAL_NAME_LENGTH];
struct cpufreq_frequency_table *pos, *table;
struct cpumask temp_mask;
unsigned int freq, i, num_cpus;
int ret;
table = cpufreq_frequency_get_table(cpumask_first(clip_cpus));
if (!table) {
pr_debug("%s: CPUFreq table not found\n", __func__);
cpumask_and(&temp_mask, clip_cpus, cpu_online_mask);
policy = cpufreq_cpu_get(cpumask_first(&temp_mask));
if (!policy) {
pr_debug("%s: CPUFreq policy not found\n", __func__);
return ERR_PTR(-EPROBE_DEFER);
}
table = policy->freq_table;
if (!table) {
pr_debug("%s: CPUFreq table not found\n", __func__);
cool_dev = ERR_PTR(-ENODEV);
goto put_policy;
}
cpufreq_dev = kzalloc(sizeof(*cpufreq_dev), GFP_KERNEL);
if (!cpufreq_dev)
return ERR_PTR(-ENOMEM);
if (!cpufreq_dev) {
cool_dev = ERR_PTR(-ENOMEM);
goto put_policy;
}
num_cpus = cpumask_weight(clip_cpus);
cpufreq_dev->time_in_idle = kcalloc(num_cpus,
@ -892,7 +904,7 @@ __cpufreq_cooling_register(struct device_node *np,
CPUFREQ_POLICY_NOTIFIER);
mutex_unlock(&cooling_cpufreq_lock);
return cool_dev;
goto put_policy;
remove_idr:
release_idr(&cpufreq_idr, cpufreq_dev->id);
@ -906,6 +918,8 @@ free_time_in_idle:
kfree(cpufreq_dev->time_in_idle);
free_cdev:
kfree(cpufreq_dev);
put_policy:
cpufreq_cpu_put(policy);
return cool_dev;
}

289
include/linux/cpufreq.h
View file

@ -36,6 +36,12 @@
struct cpufreq_governor;
enum cpufreq_table_sorting {
CPUFREQ_TABLE_UNSORTED,
CPUFREQ_TABLE_SORTED_ASCENDING,
CPUFREQ_TABLE_SORTED_DESCENDING
};
struct cpufreq_freqs {
unsigned int cpu; /* cpu nr */
unsigned int old;
@ -87,6 +93,7 @@ struct cpufreq_policy {
struct cpufreq_user_policy user_policy;
struct cpufreq_frequency_table *freq_table;
enum cpufreq_table_sorting freq_table_sorted;
struct list_head policy_list;
struct kobject kobj;
@ -113,6 +120,10 @@ struct cpufreq_policy {
bool fast_switch_possible;
bool fast_switch_enabled;
/* Cached frequency lookup from cpufreq_driver_resolve_freq. */
unsigned int cached_target_freq;
int cached_resolved_idx;
/* Synchronization for frequency transitions */
bool transition_ongoing; /* Tracks transition status */
spinlock_t transition_lock;
@ -185,6 +196,18 @@ static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
static inline void disable_cpufreq(void) { }
#endif
#ifdef CONFIG_CPU_FREQ_STAT
void cpufreq_stats_create_table(struct cpufreq_policy *policy);
void cpufreq_stats_free_table(struct cpufreq_policy *policy);
void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
unsigned int new_freq);
#else
static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { }
static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { }
static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
unsigned int new_freq) { }
#endif /* CONFIG_CPU_FREQ_STAT */
/*********************************************************************
* CPUFREQ DRIVER INTERFACE *
*********************************************************************/
@ -251,6 +274,16 @@ struct cpufreq_driver {
unsigned int index);
unsigned int (*fast_switch)(struct cpufreq_policy *policy,
unsigned int target_freq);
/*
* Caches and returns the lowest driver-supported frequency greater than
* or equal to the target frequency, subject to any driver limitations.
* Does not set the frequency. Only to be implemented for drivers with
* target().
*/
unsigned int (*resolve_freq)(struct cpufreq_policy *policy,
unsigned int target_freq);
/*
* Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
* unset.
@ -455,18 +488,13 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
#define MIN_LATENCY_MULTIPLIER (20)
#define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000)
/* 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);
int (*init)(struct cpufreq_policy *policy);
void (*exit)(struct cpufreq_policy *policy);
int (*start)(struct cpufreq_policy *policy);
void (*stop)(struct cpufreq_policy *policy);
void (*limits)(struct cpufreq_policy *policy);
ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
char *buf);
int (*store_setspeed) (struct cpufreq_policy *policy,
@ -487,12 +515,22 @@ int cpufreq_driver_target(struct cpufreq_policy *policy,
int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation);
unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq);
int cpufreq_register_governor(struct cpufreq_governor *governor);
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
struct cpufreq_governor *cpufreq_default_governor(void);
struct cpufreq_governor *cpufreq_fallback_governor(void);
static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
{
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
}
/* Governor attribute set */
struct gov_attr_set {
struct kobject kobj;
@ -582,11 +620,9 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table);
int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy);
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int target_freq,
unsigned int relation,
unsigned int *index);
int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation);
int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
unsigned int freq);
@ -597,6 +633,227 @@ int cpufreq_boost_trigger_state(int state);
int cpufreq_boost_enabled(void);
int cpufreq_enable_boost_support(void);
bool policy_has_boost_freq(struct cpufreq_policy *policy);
/* Find lowest freq at or above target in a table in ascending order */
static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq >= target_freq)
return i;
best = i;
}
return best;
}
/* Find lowest freq at or above target in a table in descending order */
static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq == target_freq)
return i;
if (freq > target_freq) {
best = i;
continue;
}
/* No freq found above target_freq */
if (best == -1)
return i;
return best;
}
return best;
}
/* Works only on sorted freq-tables */
static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy,
unsigned int target_freq)
{
target_freq = clamp_val(target_freq, policy->min, policy->max);
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
return cpufreq_table_find_index_al(policy, target_freq);
else
return cpufreq_table_find_index_dl(policy, target_freq);
}
/* Find highest freq at or below target in a table in ascending order */
static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq == target_freq)
return i;
if (freq < target_freq) {
best = i;
continue;
}
/* No freq found below target_freq */
if (best == -1)
return i;
return best;
}
return best;
}
/* Find highest freq at or below target in a table in descending order */
static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq <= target_freq)
return i;
best = i;
}
return best;
}
/* Works only on sorted freq-tables */
static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy,
unsigned int target_freq)
{
target_freq = clamp_val(target_freq, policy->min, policy->max);
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
return cpufreq_table_find_index_ah(policy, target_freq);
else
return cpufreq_table_find_index_dh(policy, target_freq);
}
/* Find closest freq to target in a table in ascending order */
static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq == target_freq)
return i;
if (freq < target_freq) {
best = i;
continue;
}
/* No freq found below target_freq */
if (best == -1)
return i;
/* Choose the closest freq */
if (target_freq - table[best].frequency > freq - target_freq)
return i;
return best;
}
return best;
}
/* Find closest freq to target in a table in descending order */
static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy,
unsigned int target_freq)
{
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq;
int i, best = -1;
for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
freq = table[i].frequency;
if (freq == target_freq)
return i;
if (freq > target_freq) {
best = i;
continue;
}
/* No freq found above target_freq */
if (best == -1)
return i;
/* Choose the closest freq */
if (table[best].frequency - target_freq > target_freq - freq)
return i;
return best;
}
return best;
}
/* Works only on sorted freq-tables */
static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy,
unsigned int target_freq)
{
target_freq = clamp_val(target_freq, policy->min, policy->max);
if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
return cpufreq_table_find_index_ac(policy, target_freq);
else
return cpufreq_table_find_index_dc(policy, target_freq);
}
static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED))
return cpufreq_table_index_unsorted(policy, target_freq,
relation);
switch (relation) {
case CPUFREQ_RELATION_L:
return cpufreq_table_find_index_l(policy, target_freq);
case CPUFREQ_RELATION_H:
return cpufreq_table_find_index_h(policy, target_freq);
case CPUFREQ_RELATION_C:
return cpufreq_table_find_index_c(policy, target_freq);
default:
pr_err("%s: Invalid relation: %d\n", __func__, relation);
return -EINVAL;
}
}
#else
static inline int cpufreq_boost_trigger_state(int state)
{
@ -617,8 +874,6 @@ static inline bool policy_has_boost_freq(struct cpufreq_policy *policy)
return false;
}
#endif
/* 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;

74
kernel/sched/cpufreq_schedutil.c
View file

@ -47,6 +47,8 @@ struct sugov_cpu {
struct update_util_data update_util;
struct sugov_policy *sg_policy;
unsigned int cached_raw_freq;
/* The fields below are only needed when sharing a policy. */
unsigned long util;
unsigned long max;
@ -106,7 +108,7 @@ static void sugov_update_commit(struct sugov_policy *sg_policy, u64 time,
/**
* get_next_freq - Compute a new frequency for a given cpufreq policy.
* @policy: cpufreq policy object to compute the new frequency for.
* @sg_cpu: schedutil cpu object to compute the new frequency for.
* @util: Current CPU utilization.
* @max: CPU capacity.
*
@ -121,14 +123,25 @@ static void sugov_update_commit(struct sugov_policy *sg_policy, u64 time,
* next_freq = C * curr_freq * util_raw / max
*
* Take C = 1.25 for the frequency tipping point at (util / max) = 0.8.
*
* The lowest driver-supported frequency which is equal or greater than the raw
* next_freq (as calculated above) is returned, subject to policy min/max and
* cpufreq driver limitations.
*/
static unsigned int get_next_freq(struct cpufreq_policy *policy,
unsigned long util, unsigned long max)
static unsigned int get_next_freq(struct sugov_cpu *sg_cpu, unsigned long util,
unsigned long max)
{
struct sugov_policy *sg_policy = sg_cpu->sg_policy;
struct cpufreq_policy *policy = sg_policy->policy;
unsigned int freq = arch_scale_freq_invariant() ?
policy->cpuinfo.max_freq : policy->cur;
return (freq + (freq >> 2)) * util / max;
freq = (freq + (freq >> 2)) * util / max;
if (freq == sg_cpu->cached_raw_freq && sg_policy->next_freq != UINT_MAX)
return sg_policy->next_freq;
sg_cpu->cached_raw_freq = freq;
return cpufreq_driver_resolve_freq(policy, freq);
}
static void sugov_update_single(struct update_util_data *hook, u64 time,
@ -143,13 +156,14 @@ static void sugov_update_single(struct update_util_data *hook, u64 time,
return;
next_f = util == ULONG_MAX ? policy->cpuinfo.max_freq :
get_next_freq(policy, util, max);
get_next_freq(sg_cpu, util, max);
sugov_update_commit(sg_policy, time, next_f);
}
static unsigned int sugov_next_freq_shared(struct sugov_policy *sg_policy,
static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu,
unsigned long util, unsigned long max)
{
struct sugov_policy *sg_policy = sg_cpu->sg_policy;
struct cpufreq_policy *policy = sg_policy->policy;
unsigned int max_f = policy->cpuinfo.max_freq;
u64 last_freq_update_time = sg_policy->last_freq_update_time;
@ -189,7 +203,7 @@ static unsigned int sugov_next_freq_shared(struct sugov_policy *sg_policy,
}
}
return get_next_freq(policy, util, max);
return get_next_freq(sg_cpu, util, max);
}
static void sugov_update_shared(struct update_util_data *hook, u64 time,
@ -206,7 +220,7 @@ static void sugov_update_shared(struct update_util_data *hook, u64 time,
sg_cpu->last_update = time;
if (sugov_should_update_freq(sg_policy, time)) {
next_f = sugov_next_freq_shared(sg_policy, util, max);
next_f = sugov_next_freq_shared(sg_cpu, util, max);
sugov_update_commit(sg_policy, time, next_f);
}
@ -394,7 +408,7 @@ static int sugov_init(struct cpufreq_policy *policy)
return ret;
}
static int sugov_exit(struct cpufreq_policy *policy)
static void sugov_exit(struct cpufreq_policy *policy)
{
struct sugov_policy *sg_policy = policy->governor_data;
struct sugov_tunables *tunables = sg_policy->tunables;
@ -412,7 +426,6 @@ static int sugov_exit(struct cpufreq_policy *policy)
mutex_unlock(&global_tunables_lock);
sugov_policy_free(sg_policy);
return 0;
}
static int sugov_start(struct cpufreq_policy *policy)
@ -434,6 +447,7 @@ static int sugov_start(struct cpufreq_policy *policy)
sg_cpu->util = ULONG_MAX;
sg_cpu->max = 0;
sg_cpu->last_update = 0;
sg_cpu->cached_raw_freq = 0;
cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
sugov_update_shared);
} else {
@ -444,7 +458,7 @@ static int sugov_start(struct cpufreq_policy *policy)
return 0;
}
static int sugov_stop(struct cpufreq_policy *policy)
static void sugov_stop(struct cpufreq_policy *policy)
{
struct sugov_policy *sg_policy = policy->governor_data;
unsigned int cpu;
@ -456,53 +470,29 @@ static int sugov_stop(struct cpufreq_policy *policy)
irq_work_sync(&sg_policy->irq_work);
cancel_work_sync(&sg_policy->work);
return 0;
}
static int sugov_limits(struct cpufreq_policy *policy)
static void sugov_limits(struct cpufreq_policy *policy)
{
struct sugov_policy *sg_policy = policy->governor_data;
if (!policy->fast_switch_enabled) {
mutex_lock(&sg_policy->work_lock);
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
cpufreq_policy_apply_limits(policy);
mutex_unlock(&sg_policy->work_lock);
}
sg_policy->need_freq_update = true;
return 0;
}
int sugov_governor(struct cpufreq_policy *policy, unsigned int event)
{
if (event == CPUFREQ_GOV_POLICY_INIT) {
return sugov_init(policy);
} else if (policy->governor_data) {
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
return sugov_exit(policy);
case CPUFREQ_GOV_START:
return sugov_start(policy);
case CPUFREQ_GOV_STOP:
return sugov_stop(policy);
case CPUFREQ_GOV_LIMITS:
return sugov_limits(policy);
}
}
return -EINVAL;
}
static struct cpufreq_governor schedutil_gov = {
.name = "schedutil",
.governor = sugov_governor,
.owner = THIS_MODULE,
.init = sugov_init,
.exit = sugov_exit,
.start = sugov_start,
.stop = sugov_stop,
.limits = sugov_limits,
};
static int __init sugov_module_init(void)