diff options
Diffstat (limited to 'drivers/cpufreq')
23 files changed, 579 insertions, 698 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index b7445b6ae5a4..74919aa81dcb 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -31,23 +31,17 @@ config CPU_FREQ_BOOST_SW depends on THERMAL config CPU_FREQ_STAT - tristate "CPU frequency translation statistics" - default y + bool "CPU frequency transition statistics" 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. diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 32a15052f363..297e9128fe9f 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -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; diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c index 404360cad25c..042023bbbf62 100644 --- a/drivers/cpufreq/amd_freq_sensitivity.c +++ b/drivers/cpufreq/amd_freq_sensitivity.c @@ -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; diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 3646b143bbf5..0bb44d5b5df4 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -79,15 +79,16 @@ static const struct of_device_id machines[] __initconst = { static int __init cpufreq_dt_platdev_init(void) { struct device_node *np = of_find_node_by_path("/"); + const struct of_device_id *match; if (!np) return -ENODEV; - if (!of_match_node(machines, np)) + match = of_match_node(machines, np); + of_node_put(np); + if (!match) return -ENODEV; - of_node_put(of_root); - return PTR_ERR_OR_ZERO(platform_device_register_simple("cpufreq-dt", -1, NULL, 0)); } diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 9009295f5134..3dd4884c6f9e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -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; - } - - 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; + index = cpufreq_frequency_table_target(policy, target_freq, relation); - 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; - - pr_debug("%s: for CPU %u, event %u\n", __func__, policy->cpu, event); + if (!try_module_get(policy->governor->owner)) + return -EINVAL; - ret = policy->governor->governor(policy, event); + pr_debug("%s: for CPU %u\n", __func__, policy->cpu); - 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); @@ -2261,6 +2311,10 @@ int cpufreq_update_policy(unsigned int cpu) * -> ask driver for current freq and notify governors about a change */ if (cpufreq_driver->get && !cpufreq_driver->setpolicy) { + if (cpufreq_suspended) { + ret = -EAGAIN; + goto unlock; + } new_policy.cur = cpufreq_update_current_freq(policy); if (WARN_ON(!new_policy.cur)) { ret = -EIO; @@ -2305,26 +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; - } - - down_write(&policy->rwsem); - policy->user_policy.max = policy->max; - cpufreq_governor(policy, CPUFREQ_GOV_LIMITS); - up_write(&policy->rwsem); + if (!policy->freq_table) + continue; + + 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; diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 316df247e00d..18da4f8051d3 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -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); - - if (dbs_info->requested_freq > policy->max) - dbs_info->requested_freq = policy->max; + requested_freq += get_freq_target(cs_tuners, policy); - __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) { diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index be498d56dd69..e415349ab31b 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -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; + + 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); -static int cpufreq_governor_limits(struct cpufreq_policy *policy) +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); diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 34eb214b6d57..ef1037e9c92b 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -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) |