Lines Matching full:policy
77 static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
78 static int cpufreq_init_governor(struct cpufreq_policy *policy);
79 static void cpufreq_exit_governor(struct cpufreq_policy *policy);
80 static void cpufreq_governor_limits(struct cpufreq_policy *policy);
81 static int cpufreq_set_policy(struct cpufreq_policy *policy,
86 * Two notifier lists: the "policy" list is involved in the
87 * validation process for a new CPU frequency policy; the
114 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy) in get_governor_parent_kobj() argument
117 return &policy->kobj; in get_governor_parent_kobj()
166 * - policy->cpus with all possible CPUs
168 void cpufreq_generic_init(struct cpufreq_policy *policy, in cpufreq_generic_init() argument
172 policy->freq_table = table; in cpufreq_generic_init()
173 policy->cpuinfo.transition_latency = transition_latency; in cpufreq_generic_init()
179 cpumask_setall(policy->cpus); in cpufreq_generic_init()
185 struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu); in cpufreq_cpu_get_raw() local
187 return policy && cpumask_test_cpu(cpu, policy->cpus) ? policy : NULL; in cpufreq_cpu_get_raw()
193 struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu); in cpufreq_generic_get() local
195 if (!policy || IS_ERR(policy->clk)) { in cpufreq_generic_get()
197 __func__, policy ? "clk" : "policy", cpu); in cpufreq_generic_get()
201 return clk_get_rate(policy->clk) / 1000; in cpufreq_generic_get()
206 * cpufreq_cpu_get - Return policy for a CPU and mark it as busy.
207 * @cpu: CPU to find the policy for.
209 * Call cpufreq_cpu_get_raw() to obtain a cpufreq policy for @cpu and increment
210 * the kobject reference counter of that policy. Return a valid policy on
213 * The policy returned by this function has to be released with the help of
218 struct cpufreq_policy *policy = NULL; in cpufreq_cpu_get() local
229 policy = cpufreq_cpu_get_raw(cpu); in cpufreq_cpu_get()
230 if (policy) in cpufreq_cpu_get()
231 kobject_get(&policy->kobj); in cpufreq_cpu_get()
236 return policy; in cpufreq_cpu_get()
241 * cpufreq_cpu_put - Decrement kobject usage counter for cpufreq policy.
242 * @policy: cpufreq policy returned by cpufreq_cpu_get().
244 void cpufreq_cpu_put(struct cpufreq_policy *policy) in cpufreq_cpu_put() argument
246 kobject_put(&policy->kobj); in cpufreq_cpu_put()
251 * cpufreq_cpu_release - Unlock a policy and decrement its usage counter.
252 * @policy: cpufreq policy returned by cpufreq_cpu_acquire().
254 void cpufreq_cpu_release(struct cpufreq_policy *policy) in cpufreq_cpu_release() argument
256 if (WARN_ON(!policy)) in cpufreq_cpu_release()
259 lockdep_assert_held(&policy->rwsem); in cpufreq_cpu_release()
261 up_write(&policy->rwsem); in cpufreq_cpu_release()
263 cpufreq_cpu_put(policy); in cpufreq_cpu_release()
267 * cpufreq_cpu_acquire - Find policy for a CPU, mark it as busy and lock it.
268 * @cpu: CPU to find the policy for.
270 * Call cpufreq_cpu_get() to get a reference on the cpufreq policy for @cpu and
271 * if the policy returned by it is not NULL, acquire its rwsem for writing.
272 * Return the policy if it is active or release it and return NULL otherwise.
274 * The policy returned by this function has to be released with the help of
280 struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); in cpufreq_cpu_acquire() local
282 if (!policy) in cpufreq_cpu_acquire()
285 down_write(&policy->rwsem); in cpufreq_cpu_acquire()
287 if (policy_is_inactive(policy)) { in cpufreq_cpu_acquire()
288 cpufreq_cpu_release(policy); in cpufreq_cpu_acquire()
292 return policy; in cpufreq_cpu_acquire()
335 * @policy: cpufreq policy to enable fast frequency switching for.
343 static void cpufreq_notify_transition(struct cpufreq_policy *policy, in cpufreq_notify_transition() argument
354 freqs->policy = policy; in cpufreq_notify_transition()
366 if (policy->cur && policy->cur != freqs->old) { in cpufreq_notify_transition()
368 freqs->old, policy->cur); in cpufreq_notify_transition()
369 freqs->old = policy->cur; in cpufreq_notify_transition()
381 cpumask_pr_args(policy->cpus)); in cpufreq_notify_transition()
383 for_each_cpu(cpu, policy->cpus) in cpufreq_notify_transition()
389 cpufreq_stats_record_transition(policy, freqs->new); in cpufreq_notify_transition()
390 policy->cur = freqs->new; in cpufreq_notify_transition()
395 static void cpufreq_notify_post_transition(struct cpufreq_policy *policy, in cpufreq_notify_post_transition() argument
398 cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); in cpufreq_notify_post_transition()
403 cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); in cpufreq_notify_post_transition()
404 cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); in cpufreq_notify_post_transition()
407 void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, in cpufreq_freq_transition_begin() argument
420 && current == policy->transition_task); in cpufreq_freq_transition_begin()
423 wait_event(policy->transition_wait, !policy->transition_ongoing); in cpufreq_freq_transition_begin()
425 spin_lock(&policy->transition_lock); in cpufreq_freq_transition_begin()
427 if (unlikely(policy->transition_ongoing)) { in cpufreq_freq_transition_begin()
428 spin_unlock(&policy->transition_lock); in cpufreq_freq_transition_begin()
432 policy->transition_ongoing = true; in cpufreq_freq_transition_begin()
433 policy->transition_task = current; in cpufreq_freq_transition_begin()
435 spin_unlock(&policy->transition_lock); in cpufreq_freq_transition_begin()
437 cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); in cpufreq_freq_transition_begin()
441 void cpufreq_freq_transition_end(struct cpufreq_policy *policy, in cpufreq_freq_transition_end() argument
444 if (WARN_ON(!policy->transition_ongoing)) in cpufreq_freq_transition_end()
447 cpufreq_notify_post_transition(policy, freqs, transition_failed); in cpufreq_freq_transition_end()
449 arch_set_freq_scale(policy->related_cpus, in cpufreq_freq_transition_end()
450 policy->cur, in cpufreq_freq_transition_end()
451 policy->cpuinfo.max_freq); in cpufreq_freq_transition_end()
453 policy->transition_ongoing = false; in cpufreq_freq_transition_end()
454 policy->transition_task = NULL; in cpufreq_freq_transition_end()
456 wake_up(&policy->transition_wait); in cpufreq_freq_transition_end()
482 * cpufreq_enable_fast_switch - Enable fast frequency switching for policy.
483 * @policy: cpufreq policy to enable fast frequency switching for.
485 * Try to enable fast frequency switching for @policy.
492 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy) in cpufreq_enable_fast_switch() argument
494 lockdep_assert_held(&policy->rwsem); in cpufreq_enable_fast_switch()
496 if (!policy->fast_switch_possible) in cpufreq_enable_fast_switch()
502 policy->fast_switch_enabled = true; in cpufreq_enable_fast_switch()
505 policy->cpu); in cpufreq_enable_fast_switch()
513 * cpufreq_disable_fast_switch - Disable fast frequency switching for policy.
514 * @policy: cpufreq policy to disable fast frequency switching for.
516 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy) in cpufreq_disable_fast_switch() argument
519 if (policy->fast_switch_enabled) { in cpufreq_disable_fast_switch()
520 policy->fast_switch_enabled = false; in cpufreq_disable_fast_switch()
528 static unsigned int __resolve_freq(struct cpufreq_policy *policy, in __resolve_freq() argument
533 target_freq = clamp_val(target_freq, policy->min, policy->max); in __resolve_freq()
535 if (!policy->freq_table) in __resolve_freq()
538 idx = cpufreq_frequency_table_target(policy, target_freq, relation); in __resolve_freq()
539 policy->cached_resolved_idx = idx; in __resolve_freq()
540 policy->cached_target_freq = target_freq; in __resolve_freq()
541 return policy->freq_table[idx].frequency; in __resolve_freq()
547 * @policy: associated policy to interrogate
550 * The target to driver frequency mapping is cached in the policy.
553 * given target_freq, subject to policy (min/max) and driver limitations.
555 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, in cpufreq_driver_resolve_freq() argument
558 return __resolve_freq(policy, target_freq, CPUFREQ_RELATION_LE); in cpufreq_driver_resolve_freq()
562 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy) in cpufreq_policy_transition_delay_us() argument
566 if (policy->transition_delay_us) in cpufreq_policy_transition_delay_us()
567 return policy->transition_delay_us; in cpufreq_policy_transition_delay_us()
569 latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC; in cpufreq_policy_transition_delay_us()
681 * Write out information from cpufreq_driver->policy[cpu]; object must be
687 (struct cpufreq_policy *policy, char *buf) \
689 return sprintf(buf, "%u\n", policy->object); \
703 static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf) in show_scaling_cur_freq() argument
708 freq = arch_freq_get_on_cpu(policy->cpu); in show_scaling_cur_freq()
712 ret = sprintf(buf, "%u\n", cpufreq_driver->get(policy->cpu)); in show_scaling_cur_freq()
714 ret = sprintf(buf, "%u\n", policy->cur); in show_scaling_cur_freq()
723 (struct cpufreq_policy *policy, const char *buf, size_t count) \
732 ret = freq_qos_update_request(policy->object##_freq_req, val);\
742 static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy, in show_cpuinfo_cur_freq() argument
745 unsigned int cur_freq = __cpufreq_get(policy); in show_cpuinfo_cur_freq()
754 * show_scaling_governor - show the current policy for the specified CPU
756 static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf) in show_scaling_governor() argument
758 if (policy->policy == CPUFREQ_POLICY_POWERSAVE) in show_scaling_governor()
760 else if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) in show_scaling_governor()
762 else if (policy->governor) in show_scaling_governor()
764 policy->governor->name); in show_scaling_governor()
769 * store_scaling_governor - store policy for the specified CPU
771 static ssize_t store_scaling_governor(struct cpufreq_policy *policy, in store_scaling_governor() argument
788 ret = cpufreq_set_policy(policy, NULL, new_pol); in store_scaling_governor()
796 ret = cpufreq_set_policy(policy, new_gov, in store_scaling_governor()
808 static ssize_t show_scaling_driver(struct cpufreq_policy *policy, char *buf) in show_scaling_driver() argument
816 static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy, in show_scaling_available_governors() argument
863 static ssize_t show_related_cpus(struct cpufreq_policy *policy, char *buf) in show_related_cpus() argument
865 return cpufreq_show_cpus(policy->related_cpus, buf); in show_related_cpus()
871 static ssize_t show_affected_cpus(struct cpufreq_policy *policy, char *buf) in show_affected_cpus() argument
873 return cpufreq_show_cpus(policy->cpus, buf); in show_affected_cpus()
876 static ssize_t store_scaling_setspeed(struct cpufreq_policy *policy, in store_scaling_setspeed() argument
882 if (!policy->governor || !policy->governor->store_setspeed) in store_scaling_setspeed()
889 policy->governor->store_setspeed(policy, freq); in store_scaling_setspeed()
894 static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf) in show_scaling_setspeed() argument
896 if (!policy->governor || !policy->governor->show_setspeed) in show_scaling_setspeed()
899 return policy->governor->show_setspeed(policy, buf); in show_scaling_setspeed()
905 static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf) in show_bios_limit() argument
909 ret = cpufreq_driver->bios_limit(policy->cpu, &limit); in show_bios_limit()
912 return sprintf(buf, "%u\n", policy->cpuinfo.max_freq); in show_bios_limit()
951 struct cpufreq_policy *policy = to_policy(kobj); in show() local
958 down_read(&policy->rwsem); in show()
959 if (likely(!policy_is_inactive(policy))) in show()
960 ret = fattr->show(policy, buf); in show()
961 up_read(&policy->rwsem); in show()
969 struct cpufreq_policy *policy = to_policy(kobj); in store() local
976 down_write(&policy->rwsem); in store()
977 if (likely(!policy_is_inactive(policy))) in store()
978 ret = fattr->store(policy, buf, count); in store()
979 up_write(&policy->rwsem); in store()
986 struct cpufreq_policy *policy = to_policy(kobj); in cpufreq_sysfs_release() local
988 complete(&policy->kobj_unregister); in cpufreq_sysfs_release()
1002 static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int cpu, in add_cpu_dev_symlink() argument
1008 if (cpumask_test_and_set_cpu(cpu, policy->real_cpus)) in add_cpu_dev_symlink()
1012 if (sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq")) in add_cpu_dev_symlink()
1016 static void remove_cpu_dev_symlink(struct cpufreq_policy *policy, int cpu, in remove_cpu_dev_symlink() argument
1021 cpumask_clear_cpu(cpu, policy->real_cpus); in remove_cpu_dev_symlink()
1024 static int cpufreq_add_dev_interface(struct cpufreq_policy *policy) in cpufreq_add_dev_interface() argument
1032 ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr)); in cpufreq_add_dev_interface()
1038 ret = sysfs_create_file(&policy->kobj, &cpuinfo_cur_freq.attr); in cpufreq_add_dev_interface()
1043 ret = sysfs_create_file(&policy->kobj, &scaling_cur_freq.attr); in cpufreq_add_dev_interface()
1048 ret = sysfs_create_file(&policy->kobj, &bios_limit.attr); in cpufreq_add_dev_interface()
1056 static int cpufreq_init_policy(struct cpufreq_policy *policy) in cpufreq_init_policy() argument
1063 /* Update policy governor to the one used before hotplug. */ in cpufreq_init_policy()
1064 gov = get_governor(policy->last_governor); in cpufreq_init_policy()
1067 gov->name, policy->cpu); in cpufreq_init_policy()
1079 /* Use the default policy if there is no last_policy. */ in cpufreq_init_policy()
1080 if (policy->last_policy) { in cpufreq_init_policy()
1081 pol = policy->last_policy; in cpufreq_init_policy()
1086 * nor "powersave", fall back to the initial policy in cpufreq_init_policy()
1090 pol = policy->policy; in cpufreq_init_policy()
1097 ret = cpufreq_set_policy(policy, gov, pol); in cpufreq_init_policy()
1104 static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cpu) in cpufreq_add_policy_cpu() argument
1109 if (cpumask_test_cpu(cpu, policy->cpus)) in cpufreq_add_policy_cpu()
1112 down_write(&policy->rwsem); in cpufreq_add_policy_cpu()
1114 cpufreq_stop_governor(policy); in cpufreq_add_policy_cpu()
1116 cpumask_set_cpu(cpu, policy->cpus); in cpufreq_add_policy_cpu()
1119 ret = cpufreq_start_governor(policy); in cpufreq_add_policy_cpu()
1123 up_write(&policy->rwsem); in cpufreq_add_policy_cpu()
1127 void refresh_frequency_limits(struct cpufreq_policy *policy) in refresh_frequency_limits() argument
1129 if (!policy_is_inactive(policy)) { in refresh_frequency_limits()
1130 pr_debug("updating policy for CPU %u\n", policy->cpu); in refresh_frequency_limits()
1132 cpufreq_set_policy(policy, policy->governor, policy->policy); in refresh_frequency_limits()
1139 struct cpufreq_policy *policy = in handle_update() local
1142 pr_debug("handle_update for cpu %u called\n", policy->cpu); in handle_update()
1143 down_write(&policy->rwsem); in handle_update()
1144 refresh_frequency_limits(policy); in handle_update()
1145 up_write(&policy->rwsem); in handle_update()
1151 struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_min); in cpufreq_notifier_min() local
1153 schedule_work(&policy->update); in cpufreq_notifier_min()
1160 struct cpufreq_policy *policy = container_of(nb, struct cpufreq_policy, nb_max); in cpufreq_notifier_max() local
1162 schedule_work(&policy->update); in cpufreq_notifier_max()
1166 static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy) in cpufreq_policy_put_kobj() argument
1171 down_write(&policy->rwsem); in cpufreq_policy_put_kobj()
1172 cpufreq_stats_free_table(policy); in cpufreq_policy_put_kobj()
1173 kobj = &policy->kobj; in cpufreq_policy_put_kobj()
1174 cmp = &policy->kobj_unregister; in cpufreq_policy_put_kobj()
1175 up_write(&policy->rwsem); in cpufreq_policy_put_kobj()
1190 struct cpufreq_policy *policy; in cpufreq_policy_alloc() local
1197 policy = kzalloc(sizeof(*policy), GFP_KERNEL); in cpufreq_policy_alloc()
1198 if (!policy) in cpufreq_policy_alloc()
1201 if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL)) in cpufreq_policy_alloc()
1204 if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL)) in cpufreq_policy_alloc()
1207 if (!zalloc_cpumask_var(&policy->real_cpus, GFP_KERNEL)) in cpufreq_policy_alloc()
1210 ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, in cpufreq_policy_alloc()
1211 cpufreq_global_kobject, "policy%u", cpu); in cpufreq_policy_alloc()
1213 dev_err(dev, "%s: failed to init policy->kobj: %d\n", __func__, ret); in cpufreq_policy_alloc()
1215 * The entire policy object will be freed below, but the extra in cpufreq_policy_alloc()
1219 kobject_put(&policy->kobj); in cpufreq_policy_alloc()
1223 freq_constraints_init(&policy->constraints); in cpufreq_policy_alloc()
1225 policy->nb_min.notifier_call = cpufreq_notifier_min; in cpufreq_policy_alloc()
1226 policy->nb_max.notifier_call = cpufreq_notifier_max; in cpufreq_policy_alloc()
1228 ret = freq_qos_add_notifier(&policy->constraints, FREQ_QOS_MIN, in cpufreq_policy_alloc()
1229 &policy->nb_min); in cpufreq_policy_alloc()
1232 ret, cpumask_pr_args(policy->cpus)); in cpufreq_policy_alloc()
1236 ret = freq_qos_add_notifier(&policy->constraints, FREQ_QOS_MAX, in cpufreq_policy_alloc()
1237 &policy->nb_max); in cpufreq_policy_alloc()
1240 ret, cpumask_pr_args(policy->cpus)); in cpufreq_policy_alloc()
1244 INIT_LIST_HEAD(&policy->policy_list); in cpufreq_policy_alloc()
1245 init_rwsem(&policy->rwsem); in cpufreq_policy_alloc()
1246 spin_lock_init(&policy->transition_lock); in cpufreq_policy_alloc()
1247 init_waitqueue_head(&policy->transition_wait); in cpufreq_policy_alloc()
1248 init_completion(&policy->kobj_unregister); in cpufreq_policy_alloc()
1249 INIT_WORK(&policy->update, handle_update); in cpufreq_policy_alloc()
1251 policy->cpu = cpu; in cpufreq_policy_alloc()
1252 return policy; in cpufreq_policy_alloc()
1255 freq_qos_remove_notifier(&policy->constraints, FREQ_QOS_MIN, in cpufreq_policy_alloc()
1256 &policy->nb_min); in cpufreq_policy_alloc()
1258 cpufreq_policy_put_kobj(policy); in cpufreq_policy_alloc()
1260 free_cpumask_var(policy->real_cpus); in cpufreq_policy_alloc()
1262 free_cpumask_var(policy->related_cpus); in cpufreq_policy_alloc()
1264 free_cpumask_var(policy->cpus); in cpufreq_policy_alloc()
1266 kfree(policy); in cpufreq_policy_alloc()
1271 static void cpufreq_policy_free(struct cpufreq_policy *policy) in cpufreq_policy_free() argument
1277 * The callers must ensure the policy is inactive by now, to avoid any in cpufreq_policy_free()
1280 if (unlikely(!policy_is_inactive(policy))) in cpufreq_policy_free()
1281 pr_warn("%s: Freeing active policy\n", __func__); in cpufreq_policy_free()
1283 /* Remove policy from list */ in cpufreq_policy_free()
1285 list_del(&policy->policy_list); in cpufreq_policy_free()
1287 for_each_cpu(cpu, policy->related_cpus) in cpufreq_policy_free()
1291 freq_qos_remove_notifier(&policy->constraints, FREQ_QOS_MAX, in cpufreq_policy_free()
1292 &policy->nb_max); in cpufreq_policy_free()
1293 freq_qos_remove_notifier(&policy->constraints, FREQ_QOS_MIN, in cpufreq_policy_free()
1294 &policy->nb_min); in cpufreq_policy_free()
1296 /* Cancel any pending policy->update work before freeing the policy. */ in cpufreq_policy_free()
1297 cancel_work_sync(&policy->update); in cpufreq_policy_free()
1299 if (policy->max_freq_req) { in cpufreq_policy_free()
1306 CPUFREQ_REMOVE_POLICY, policy); in cpufreq_policy_free()
1307 freq_qos_remove_request(policy->max_freq_req); in cpufreq_policy_free()
1310 freq_qos_remove_request(policy->min_freq_req); in cpufreq_policy_free()
1311 kfree(policy->min_freq_req); in cpufreq_policy_free()
1313 cpufreq_policy_put_kobj(policy); in cpufreq_policy_free()
1314 free_cpumask_var(policy->real_cpus); in cpufreq_policy_free()
1315 free_cpumask_var(policy->related_cpus); in cpufreq_policy_free()
1316 free_cpumask_var(policy->cpus); in cpufreq_policy_free()
1317 kfree(policy); in cpufreq_policy_free()
1322 struct cpufreq_policy *policy; in cpufreq_online() local
1330 /* Check if this CPU already has a policy to manage it */ in cpufreq_online()
1331 policy = per_cpu(cpufreq_cpu_data, cpu); in cpufreq_online()
1332 if (policy) { in cpufreq_online()
1333 WARN_ON(!cpumask_test_cpu(cpu, policy->related_cpus)); in cpufreq_online()
1334 if (!policy_is_inactive(policy)) in cpufreq_online()
1335 return cpufreq_add_policy_cpu(policy, cpu); in cpufreq_online()
1337 /* This is the only online CPU for the policy. Start over. */ in cpufreq_online()
1339 down_write(&policy->rwsem); in cpufreq_online()
1340 policy->cpu = cpu; in cpufreq_online()
1341 policy->governor = NULL; in cpufreq_online()
1344 policy = cpufreq_policy_alloc(cpu); in cpufreq_online()
1345 if (!policy) in cpufreq_online()
1347 down_write(&policy->rwsem); in cpufreq_online()
1351 /* Recover policy->cpus using related_cpus */ in cpufreq_online()
1352 cpumask_copy(policy->cpus, policy->related_cpus); in cpufreq_online()
1354 ret = cpufreq_driver->online(policy); in cpufreq_online()
1361 cpumask_copy(policy->cpus, cpumask_of(cpu)); in cpufreq_online()
1367 ret = cpufreq_driver->init(policy); in cpufreq_online()
1375 * The initialization has succeeded and the policy is online. in cpufreq_online()
1379 ret = cpufreq_table_validate_and_sort(policy); in cpufreq_online()
1383 /* related_cpus should at least include policy->cpus. */ in cpufreq_online()
1384 cpumask_copy(policy->related_cpus, policy->cpus); in cpufreq_online()
1391 cpumask_and(policy->cpus, policy->cpus, cpu_online_mask); in cpufreq_online()
1394 for_each_cpu(j, policy->related_cpus) { in cpufreq_online()
1395 per_cpu(cpufreq_cpu_data, j) = policy; in cpufreq_online()
1396 add_cpu_dev_symlink(policy, j, get_cpu_device(j)); in cpufreq_online()
1399 policy->min_freq_req = kzalloc(2 * sizeof(*policy->min_freq_req), in cpufreq_online()
1401 if (!policy->min_freq_req) { in cpufreq_online()
1406 ret = freq_qos_add_request(&policy->constraints, in cpufreq_online()
1407 policy->min_freq_req, FREQ_QOS_MIN, in cpufreq_online()
1414 kfree(policy->min_freq_req); in cpufreq_online()
1415 policy->min_freq_req = NULL; in cpufreq_online()
1424 policy->max_freq_req = policy->min_freq_req + 1; in cpufreq_online()
1426 ret = freq_qos_add_request(&policy->constraints, in cpufreq_online()
1427 policy->max_freq_req, FREQ_QOS_MAX, in cpufreq_online()
1430 policy->max_freq_req = NULL; in cpufreq_online()
1435 CPUFREQ_CREATE_POLICY, policy); in cpufreq_online()
1439 policy->cur = cpufreq_driver->get(policy->cpu); in cpufreq_online()
1440 if (!policy->cur) { in cpufreq_online()
1457 * for the next freq which is >= policy->cur ('cur' must be set by now, in cpufreq_online()
1461 * We are passing target-freq as "policy->cur - 1" otherwise in cpufreq_online()
1462 * __cpufreq_driver_target() would simply fail, as policy->cur will be in cpufreq_online()
1467 unsigned int old_freq = policy->cur; in cpufreq_online()
1470 ret = cpufreq_frequency_table_get_index(policy, old_freq); in cpufreq_online()
1472 ret = __cpufreq_driver_target(policy, old_freq - 1, in cpufreq_online()
1482 __func__, policy->cpu, old_freq, policy->cur); in cpufreq_online()
1487 ret = cpufreq_add_dev_interface(policy); in cpufreq_online()
1491 cpufreq_stats_create_table(policy); in cpufreq_online()
1494 list_add(&policy->policy_list, &cpufreq_policy_list); in cpufreq_online()
1501 * once the energy model is properly initialized for the policy in cpufreq_online()
1504 * Also, this should be called before the policy is registered in cpufreq_online()
1508 cpufreq_driver->register_em(policy); in cpufreq_online()
1511 ret = cpufreq_init_policy(policy); in cpufreq_online()
1513 pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n", in cpufreq_online()
1518 up_write(&policy->rwsem); in cpufreq_online()
1520 kobject_uevent(&policy->kobj, KOBJ_ADD); in cpufreq_online()
1522 /* Callback for handling stuff after policy is ready */ in cpufreq_online()
1524 cpufreq_driver->ready(policy); in cpufreq_online()
1527 policy->cdev = of_cpufreq_cooling_register(policy); in cpufreq_online()
1534 for_each_cpu(j, policy->real_cpus) in cpufreq_online()
1535 remove_cpu_dev_symlink(policy, j, get_cpu_device(j)); in cpufreq_online()
1539 cpufreq_driver->offline(policy); in cpufreq_online()
1543 cpufreq_driver->exit(policy); in cpufreq_online()
1546 cpumask_clear(policy->cpus); in cpufreq_online()
1547 up_write(&policy->rwsem); in cpufreq_online()
1549 cpufreq_policy_free(policy); in cpufreq_online()
1560 struct cpufreq_policy *policy; in cpufreq_add_dev() local
1573 policy = per_cpu(cpufreq_cpu_data, cpu); in cpufreq_add_dev()
1574 if (policy) in cpufreq_add_dev()
1575 add_cpu_dev_symlink(policy, cpu, dev); in cpufreq_add_dev()
1580 static void __cpufreq_offline(unsigned int cpu, struct cpufreq_policy *policy) in __cpufreq_offline() argument
1585 cpufreq_stop_governor(policy); in __cpufreq_offline()
1587 cpumask_clear_cpu(cpu, policy->cpus); in __cpufreq_offline()
1589 if (!policy_is_inactive(policy)) { in __cpufreq_offline()
1591 if (cpu == policy->cpu) in __cpufreq_offline()
1592 policy->cpu = cpumask_any(policy->cpus); in __cpufreq_offline()
1594 /* Start the governor again for the active policy. */ in __cpufreq_offline()
1596 ret = cpufreq_start_governor(policy); in __cpufreq_offline()
1605 strncpy(policy->last_governor, policy->governor->name, in __cpufreq_offline()
1608 policy->last_policy = policy->policy; in __cpufreq_offline()
1611 cpufreq_cooling_unregister(policy->cdev); in __cpufreq_offline()
1612 policy->cdev = NULL; in __cpufreq_offline()
1616 cpufreq_exit_governor(policy); in __cpufreq_offline()
1623 cpufreq_driver->offline(policy); in __cpufreq_offline()
1625 cpufreq_driver->exit(policy); in __cpufreq_offline()
1626 policy->freq_table = NULL; in __cpufreq_offline()
1632 struct cpufreq_policy *policy; in cpufreq_offline() local
1636 policy = cpufreq_cpu_get_raw(cpu); in cpufreq_offline()
1637 if (!policy) { in cpufreq_offline()
1642 down_write(&policy->rwsem); in cpufreq_offline()
1644 __cpufreq_offline(cpu, policy); in cpufreq_offline()
1646 up_write(&policy->rwsem); in cpufreq_offline()
1658 struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu); in cpufreq_remove_dev() local
1660 if (!policy) in cpufreq_remove_dev()
1663 down_write(&policy->rwsem); in cpufreq_remove_dev()
1666 __cpufreq_offline(cpu, policy); in cpufreq_remove_dev()
1668 remove_cpu_dev_symlink(policy, cpu, dev); in cpufreq_remove_dev()
1670 if (!cpumask_empty(policy->real_cpus)) { in cpufreq_remove_dev()
1671 up_write(&policy->rwsem); in cpufreq_remove_dev()
1677 cpufreq_driver->exit(policy); in cpufreq_remove_dev()
1679 up_write(&policy->rwsem); in cpufreq_remove_dev()
1681 cpufreq_policy_free(policy); in cpufreq_remove_dev()
1686 * @policy: Policy managing CPUs.
1692 static void cpufreq_out_of_sync(struct cpufreq_policy *policy, in cpufreq_out_of_sync() argument
1698 policy->cur, new_freq); in cpufreq_out_of_sync()
1700 freqs.old = policy->cur; in cpufreq_out_of_sync()
1703 cpufreq_freq_transition_begin(policy, &freqs); in cpufreq_out_of_sync()
1704 cpufreq_freq_transition_end(policy, &freqs, 0); in cpufreq_out_of_sync()
1707 static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, bool update) in cpufreq_verify_current_freq() argument
1711 new_freq = cpufreq_driver->get(policy->cpu); in cpufreq_verify_current_freq()
1716 * If fast frequency switching is used with the given policy, the check in cpufreq_verify_current_freq()
1717 * against policy->cur is pointless, so skip it in that case. in cpufreq_verify_current_freq()
1719 if (policy->fast_switch_enabled || !has_target()) in cpufreq_verify_current_freq()
1722 if (policy->cur != new_freq) { in cpufreq_verify_current_freq()
1730 if (abs(policy->cur - new_freq) < HZ_PER_MHZ) in cpufreq_verify_current_freq()
1731 return policy->cur; in cpufreq_verify_current_freq()
1733 cpufreq_out_of_sync(policy, new_freq); in cpufreq_verify_current_freq()
1735 schedule_work(&policy->update); in cpufreq_verify_current_freq()
1742 * cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
1750 struct cpufreq_policy *policy; in cpufreq_quick_get() local
1764 policy = cpufreq_cpu_get(cpu); in cpufreq_quick_get()
1765 if (policy) { in cpufreq_quick_get()
1766 ret_freq = policy->cur; in cpufreq_quick_get()
1767 cpufreq_cpu_put(policy); in cpufreq_quick_get()
1782 struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); in cpufreq_quick_get_max() local
1785 if (policy) { in cpufreq_quick_get_max()
1786 ret_freq = policy->max; in cpufreq_quick_get_max()
1787 cpufreq_cpu_put(policy); in cpufreq_quick_get_max()
1802 struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); in cpufreq_get_hw_max_freq() local
1805 if (policy) { in cpufreq_get_hw_max_freq()
1806 ret_freq = policy->cpuinfo.max_freq; in cpufreq_get_hw_max_freq()
1807 cpufreq_cpu_put(policy); in cpufreq_get_hw_max_freq()
1814 static unsigned int __cpufreq_get(struct cpufreq_policy *policy) in __cpufreq_get() argument
1816 if (unlikely(policy_is_inactive(policy))) in __cpufreq_get()
1819 return cpufreq_verify_current_freq(policy, true); in __cpufreq_get()
1830 struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); in cpufreq_get() local
1833 if (policy) { in cpufreq_get()
1834 down_read(&policy->rwsem); in cpufreq_get()
1836 ret_freq = __cpufreq_get(policy); in cpufreq_get()
1837 up_read(&policy->rwsem); in cpufreq_get()
1839 cpufreq_cpu_put(policy); in cpufreq_get()
1857 int cpufreq_generic_suspend(struct cpufreq_policy *policy) in cpufreq_generic_suspend() argument
1861 if (!policy->suspend_freq) { in cpufreq_generic_suspend()
1867 policy->suspend_freq); in cpufreq_generic_suspend()
1869 ret = __cpufreq_driver_target(policy, policy->suspend_freq, in cpufreq_generic_suspend()
1873 __func__, policy->suspend_freq, ret); in cpufreq_generic_suspend()
1889 struct cpufreq_policy *policy; in cpufreq_suspend() local
1899 for_each_active_policy(policy) { in cpufreq_suspend()
1901 down_write(&policy->rwsem); in cpufreq_suspend()
1902 cpufreq_stop_governor(policy); in cpufreq_suspend()
1903 up_write(&policy->rwsem); in cpufreq_suspend()
1906 if (cpufreq_driver->suspend && cpufreq_driver->suspend(policy)) in cpufreq_suspend()
1923 struct cpufreq_policy *policy; in cpufreq_resume() local
1939 for_each_active_policy(policy) { in cpufreq_resume()
1940 if (cpufreq_driver->resume && cpufreq_driver->resume(policy)) { in cpufreq_resume()
1942 policy); in cpufreq_resume()
1944 down_write(&policy->rwsem); in cpufreq_resume()
1945 ret = cpufreq_start_governor(policy); in cpufreq_resume()
1946 up_write(&policy->rwsem); in cpufreq_resume()
1949 pr_err("%s: Failed to start governor for policy: %p\n", in cpufreq_resume()
1950 __func__, policy); in cpufreq_resume()
2008 * of notifiers that ron on cpufreq policy changes.
2094 * @policy: cpufreq policy to switch the frequency for.
2104 * This function must not be called if policy->fast_switch_enabled is unset.
2107 * twice in parallel for the same policy and that it will never be called in
2108 * parallel with either ->target() or ->target_index() for the same policy.
2115 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, in cpufreq_driver_fast_switch() argument
2121 target_freq = clamp_val(target_freq, policy->min, policy->max); in cpufreq_driver_fast_switch()
2122 freq = cpufreq_driver->fast_switch(policy, target_freq); in cpufreq_driver_fast_switch()
2127 policy->cur = freq; in cpufreq_driver_fast_switch()
2128 arch_set_freq_scale(policy->related_cpus, freq, in cpufreq_driver_fast_switch()
2129 policy->cpuinfo.max_freq); in cpufreq_driver_fast_switch()
2130 cpufreq_stats_record_transition(policy, freq); in cpufreq_driver_fast_switch()
2133 for_each_cpu(cpu, policy->cpus) in cpufreq_driver_fast_switch()
2155 * This function must not be called if policy->fast_switch_enabled is unset.
2182 static int __target_intermediate(struct cpufreq_policy *policy, in __target_intermediate() argument
2187 freqs->new = cpufreq_driver->get_intermediate(policy, index); in __target_intermediate()
2194 __func__, policy->cpu, freqs->old, freqs->new); in __target_intermediate()
2196 cpufreq_freq_transition_begin(policy, freqs); in __target_intermediate()
2197 ret = cpufreq_driver->target_intermediate(policy, index); in __target_intermediate()
2198 cpufreq_freq_transition_end(policy, freqs, ret); in __target_intermediate()
2207 static int __target_index(struct cpufreq_policy *policy, int index) in __target_index() argument
2209 struct cpufreq_freqs freqs = {.old = policy->cur, .flags = 0}; in __target_index()
2211 unsigned int newfreq = policy->freq_table[index].frequency; in __target_index()
2215 if (newfreq == policy->cur) in __target_index()
2219 restore_freq = policy->cur; in __target_index()
2225 retval = __target_intermediate(policy, &freqs, index); in __target_index()
2237 __func__, policy->cpu, freqs.old, freqs.new); in __target_index()
2239 cpufreq_freq_transition_begin(policy, &freqs); in __target_index()
2242 retval = cpufreq_driver->target_index(policy, index); in __target_index()
2248 cpufreq_freq_transition_end(policy, &freqs, retval); in __target_index()
2259 cpufreq_freq_transition_begin(policy, &freqs); in __target_index()
2260 cpufreq_freq_transition_end(policy, &freqs, 0); in __target_index()
2267 int __cpufreq_driver_target(struct cpufreq_policy *policy, in __cpufreq_driver_target() argument
2276 target_freq = __resolve_freq(policy, target_freq, relation); in __cpufreq_driver_target()
2279 policy->cpu, target_freq, relation, old_target_freq); in __cpufreq_driver_target()
2287 if (target_freq == policy->cur && in __cpufreq_driver_target()
2296 if (!policy->efficiencies_available) in __cpufreq_driver_target()
2299 return cpufreq_driver->target(policy, target_freq, relation); in __cpufreq_driver_target()
2305 return __target_index(policy, policy->cached_resolved_idx); in __cpufreq_driver_target()
2309 int cpufreq_driver_target(struct cpufreq_policy *policy, in cpufreq_driver_target() argument
2315 down_write(&policy->rwsem); in cpufreq_driver_target()
2317 ret = __cpufreq_driver_target(policy, target_freq, relation); in cpufreq_driver_target()
2319 up_write(&policy->rwsem); in cpufreq_driver_target()
2330 static int cpufreq_init_governor(struct cpufreq_policy *policy) in cpufreq_init_governor() argument
2341 if (!policy->governor) in cpufreq_init_governor()
2345 if (policy->governor->flags & CPUFREQ_GOV_DYNAMIC_SWITCHING && in cpufreq_init_governor()
2351 policy->governor->name, gov->name); in cpufreq_init_governor()
2352 policy->governor = gov; in cpufreq_init_governor()
2358 if (!try_module_get(policy->governor->owner)) in cpufreq_init_governor()
2361 pr_debug("%s: for CPU %u\n", __func__, policy->cpu); in cpufreq_init_governor()
2363 if (policy->governor->init) { in cpufreq_init_governor()
2364 ret = policy->governor->init(policy); in cpufreq_init_governor()
2366 module_put(policy->governor->owner); in cpufreq_init_governor()
2371 policy->strict_target = !!(policy->governor->flags & CPUFREQ_GOV_STRICT_TARGET); in cpufreq_init_governor()
2376 static void cpufreq_exit_governor(struct cpufreq_policy *policy) in cpufreq_exit_governor() argument
2378 if (cpufreq_suspended || !policy->governor) in cpufreq_exit_governor()
2381 pr_debug("%s: for CPU %u\n", __func__, policy->cpu); in cpufreq_exit_governor()
2383 if (policy->governor->exit) in cpufreq_exit_governor()
2384 policy->governor->exit(policy); in cpufreq_exit_governor()
2386 module_put(policy->governor->owner); in cpufreq_exit_governor()
2389 int cpufreq_start_governor(struct cpufreq_policy *policy) in cpufreq_start_governor() argument
2396 if (!policy->governor) in cpufreq_start_governor()
2399 pr_debug("%s: for CPU %u\n", __func__, policy->cpu); in cpufreq_start_governor()
2402 cpufreq_verify_current_freq(policy, false); in cpufreq_start_governor()
2404 if (policy->governor->start) { in cpufreq_start_governor()
2405 ret = policy->governor->start(policy); in cpufreq_start_governor()
2410 if (policy->governor->limits) in cpufreq_start_governor()
2411 policy->governor->limits(policy); in cpufreq_start_governor()
2416 void cpufreq_stop_governor(struct cpufreq_policy *policy) in cpufreq_stop_governor() argument
2418 if (cpufreq_suspended || !policy->governor) in cpufreq_stop_governor()
2421 pr_debug("%s: for CPU %u\n", __func__, policy->cpu); in cpufreq_stop_governor()
2423 if (policy->governor->stop) in cpufreq_stop_governor()
2424 policy->governor->stop(policy); in cpufreq_stop_governor()
2427 static void cpufreq_governor_limits(struct cpufreq_policy *policy) in cpufreq_governor_limits() argument
2429 if (cpufreq_suspended || !policy->governor) in cpufreq_governor_limits()
2432 pr_debug("%s: for CPU %u\n", __func__, policy->cpu); in cpufreq_governor_limits()
2434 if (policy->governor->limits) in cpufreq_governor_limits()
2435 policy->governor->limits(policy); in cpufreq_governor_limits()
2463 struct cpufreq_policy *policy; in cpufreq_unregister_governor() local
2474 for_each_inactive_policy(policy) { in cpufreq_unregister_governor()
2475 if (!strcmp(policy->last_governor, governor->name)) { in cpufreq_unregister_governor()
2476 policy->governor = NULL; in cpufreq_unregister_governor()
2477 strcpy(policy->last_governor, "\0"); in cpufreq_unregister_governor()
2490 * POLICY INTERFACE *
2495 * @policy: struct cpufreq_policy into which the current cpufreq_policy
2497 * @cpu: CPU to find the policy for
2499 * Reads the current cpufreq policy.
2501 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu) in cpufreq_get_policy() argument
2504 if (!policy) in cpufreq_get_policy()
2511 memcpy(policy, cpu_policy, sizeof(*policy)); in cpufreq_get_policy()
2519 * cpufreq_set_policy - Modify cpufreq policy parameters.
2520 * @policy: Policy object to modify.
2521 * @new_gov: Policy governor pointer.
2522 * @new_pol: Policy value (for drivers with built-in governors).
2525 * limits to be set for the policy, update @policy with the verified limits
2527 * carry out a governor update for @policy. That is, run the current governor's
2529 * @policy) or replace the governor for @policy with @new_gov.
2531 * The cpuinfo part of @policy is not updated by this function.
2533 static int cpufreq_set_policy(struct cpufreq_policy *policy, in cpufreq_set_policy() argument
2541 memcpy(&new_data.cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo)); in cpufreq_set_policy()
2542 new_data.freq_table = policy->freq_table; in cpufreq_set_policy()
2543 new_data.cpu = policy->cpu; in cpufreq_set_policy()
2548 new_data.min = freq_qos_read_value(&policy->constraints, FREQ_QOS_MIN); in cpufreq_set_policy()
2549 new_data.max = freq_qos_read_value(&policy->constraints, FREQ_QOS_MAX); in cpufreq_set_policy()
2551 pr_debug("setting new policy for CPU %u: %u - %u kHz\n", in cpufreq_set_policy()
2563 * Resolve policy min/max to available frequencies. It ensures in cpufreq_set_policy()
2567 policy->min = new_data.min; in cpufreq_set_policy()
2568 policy->max = new_data.max; in cpufreq_set_policy()
2569 policy->min = __resolve_freq(policy, policy->min, CPUFREQ_RELATION_L); in cpufreq_set_policy()
2570 policy->max = __resolve_freq(policy, policy->max, CPUFREQ_RELATION_H); in cpufreq_set_policy()
2571 trace_cpu_frequency_limits(policy); in cpufreq_set_policy()
2573 policy->cached_target_freq = UINT_MAX; in cpufreq_set_policy()
2576 policy->min, policy->max); in cpufreq_set_policy()
2579 policy->policy = new_pol; in cpufreq_set_policy()
2581 return cpufreq_driver->setpolicy(policy); in cpufreq_set_policy()
2584 if (new_gov == policy->governor) { in cpufreq_set_policy()
2586 cpufreq_governor_limits(policy); in cpufreq_set_policy()
2593 old_gov = policy->governor; in cpufreq_set_policy()
2596 cpufreq_stop_governor(policy); in cpufreq_set_policy()
2597 cpufreq_exit_governor(policy); in cpufreq_set_policy()
2601 policy->governor = new_gov; in cpufreq_set_policy()
2602 ret = cpufreq_init_governor(policy); in cpufreq_set_policy()
2604 ret = cpufreq_start_governor(policy); in cpufreq_set_policy()
2607 sched_cpufreq_governor_change(policy, old_gov); in cpufreq_set_policy()
2610 cpufreq_exit_governor(policy); in cpufreq_set_policy()
2614 pr_debug("starting governor %s failed\n", policy->governor->name); in cpufreq_set_policy()
2616 policy->governor = old_gov; in cpufreq_set_policy()
2617 if (cpufreq_init_governor(policy)) in cpufreq_set_policy()
2618 policy->governor = NULL; in cpufreq_set_policy()
2620 cpufreq_start_governor(policy); in cpufreq_set_policy()
2627 * cpufreq_update_policy - Re-evaluate an existing cpufreq policy.
2628 * @cpu: CPU to re-evaluate the policy for.
2630 * Update the current frequency for the cpufreq policy of @cpu and use
2632 * evaluation of policy notifiers and the cpufreq driver's ->verify() callback
2633 * for the policy in question, among other things.
2637 struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu); in cpufreq_update_policy() local
2639 if (!policy) in cpufreq_update_policy()
2647 (cpufreq_suspended || WARN_ON(!cpufreq_verify_current_freq(policy, false)))) in cpufreq_update_policy()
2650 refresh_frequency_limits(policy); in cpufreq_update_policy()
2653 cpufreq_cpu_release(policy); in cpufreq_update_policy()
2658 * cpufreq_update_limits - Update policy limits for a given CPU.
2659 * @cpu: CPU to update the policy limits for.
2676 static int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state) in cpufreq_boost_set_sw() argument
2680 if (!policy->freq_table) in cpufreq_boost_set_sw()
2683 ret = cpufreq_frequency_table_cpuinfo(policy, policy->freq_table); in cpufreq_boost_set_sw()
2685 pr_err("%s: Policy frequency update failed\n", __func__); in cpufreq_boost_set_sw()
2689 ret = freq_qos_update_request(policy->max_freq_req, policy->max); in cpufreq_boost_set_sw()
2698 struct cpufreq_policy *policy; in cpufreq_boost_trigger_state() local
2710 for_each_active_policy(policy) { in cpufreq_boost_trigger_state()
2711 ret = cpufreq_driver->set_boost(policy, state); in cpufreq_boost_trigger_state()