1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/include/linux/cpufreq.h
5 * Copyright (C) 2001 Russell King
6 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
8 #ifndef _LINUX_CPUFREQ_H
9 #define _LINUX_CPUFREQ_H
11 #include <linux/clk.h>
12 #include <linux/cpumask.h>
13 #include <linux/completion.h>
14 #include <linux/kobject.h>
15 #include <linux/notifier.h>
16 #include <linux/pm_qos.h>
17 #include <linux/spinlock.h>
18 #include <linux/sysfs.h>
20 /*********************************************************************
22 *********************************************************************/
24 * Frequency values here are CPU kHz
26 * Maximum transition latency is in nanoseconds - if it's unknown,
27 * CPUFREQ_ETERNAL shall be used.
30 #define CPUFREQ_ETERNAL (-1)
31 #define CPUFREQ_NAME_LEN 16
32 /* Print length for names. Extra 1 space for accommodating '\n' in prints */
33 #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
35 struct cpufreq_governor;
37 enum cpufreq_table_sorting {
38 CPUFREQ_TABLE_UNSORTED,
39 CPUFREQ_TABLE_SORTED_ASCENDING,
40 CPUFREQ_TABLE_SORTED_DESCENDING
43 struct cpufreq_cpuinfo {
44 unsigned int max_freq;
45 unsigned int min_freq;
47 /* in 10^(-9) s = nanoseconds */
48 unsigned int transition_latency;
51 struct cpufreq_policy {
52 /* CPUs sharing clock, require sw coordination */
53 cpumask_var_t cpus; /* Online CPUs only */
54 cpumask_var_t related_cpus; /* Online + Offline CPUs */
55 cpumask_var_t real_cpus; /* Related and present */
57 unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs
59 unsigned int cpu; /* cpu managing this policy, must be online */
62 struct cpufreq_cpuinfo cpuinfo;/* see above */
64 unsigned int min; /* in kHz */
65 unsigned int max; /* in kHz */
66 unsigned int cur; /* in kHz, only needed if cpufreq
67 * governors are used */
68 unsigned int restore_freq; /* = policy->cur before transition */
69 unsigned int suspend_freq; /* freq to set during suspend */
71 unsigned int policy; /* see above */
72 unsigned int last_policy; /* policy before unplug */
73 struct cpufreq_governor *governor; /* see below */
75 char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */
77 struct work_struct update; /* if update_policy() needs to be
78 * called, but you're in IRQ context */
80 struct freq_constraints constraints;
81 struct freq_qos_request *min_freq_req;
82 struct freq_qos_request *max_freq_req;
84 struct cpufreq_frequency_table *freq_table;
85 enum cpufreq_table_sorting freq_table_sorted;
87 struct list_head policy_list;
89 struct completion kobj_unregister;
92 * The rules for this semaphore:
93 * - Any routine that wants to read from the policy structure will
94 * do a down_read on this semaphore.
95 * - Any routine that will write to the policy structure and/or may take away
96 * the policy altogether (eg. CPU hotplug), will hold this lock in write
97 * mode before doing so.
99 struct rw_semaphore rwsem;
103 * - fast_switch_possible should be set by the driver if it can
104 * guarantee that frequency can be changed on any CPU sharing the
105 * policy and that the change will affect all of the policy CPUs then.
106 * - fast_switch_enabled is to be set by governors that support fast
107 * frequency switching with the help of cpufreq_enable_fast_switch().
109 bool fast_switch_possible;
110 bool fast_switch_enabled;
113 * Preferred average time interval between consecutive invocations of
114 * the driver to set the frequency for this policy. To be set by the
115 * scaling driver (0, which is the default, means no preference).
117 unsigned int transition_delay_us;
120 * Remote DVFS flag (Not added to the driver structure as we don't want
121 * to access another structure from scheduler hotpath).
123 * Should be set if CPUs can do DVFS on behalf of other CPUs from
124 * different cpufreq policies.
126 bool dvfs_possible_from_any_cpu;
128 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
129 unsigned int cached_target_freq;
130 int cached_resolved_idx;
132 /* Synchronization for frequency transitions */
133 bool transition_ongoing; /* Tracks transition status */
134 spinlock_t transition_lock;
135 wait_queue_head_t transition_wait;
136 struct task_struct *transition_task; /* Task which is doing the transition */
139 struct cpufreq_stats *stats;
141 /* For cpufreq driver's internal use */
144 /* Pointer to the cooling device if used for thermal mitigation */
145 struct thermal_cooling_device *cdev;
147 struct notifier_block nb_min;
148 struct notifier_block nb_max;
151 struct cpufreq_freqs {
152 struct cpufreq_policy *policy;
155 u8 flags; /* flags of cpufreq_driver, see below. */
159 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
160 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
161 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
162 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
164 #ifdef CONFIG_CPU_FREQ
165 struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
166 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
167 void cpufreq_cpu_put(struct cpufreq_policy *policy);
169 static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu)
173 static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
177 static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
180 static inline bool policy_is_inactive(struct cpufreq_policy *policy)
182 return cpumask_empty(policy->cpus);
185 static inline bool policy_is_shared(struct cpufreq_policy *policy)
187 return cpumask_weight(policy->cpus) > 1;
190 /* /sys/devices/system/cpu/cpufreq: entry point for global variables */
191 extern struct kobject *cpufreq_global_kobject;
193 #ifdef CONFIG_CPU_FREQ
194 unsigned int cpufreq_get(unsigned int cpu);
195 unsigned int cpufreq_quick_get(unsigned int cpu);
196 unsigned int cpufreq_quick_get_max(unsigned int cpu);
197 void disable_cpufreq(void);
199 u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
201 struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu);
202 void cpufreq_cpu_release(struct cpufreq_policy *policy);
203 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
204 int cpufreq_set_policy(struct cpufreq_policy *policy,
205 struct cpufreq_policy *new_policy);
206 void refresh_frequency_limits(struct cpufreq_policy *policy);
207 void cpufreq_update_policy(unsigned int cpu);
208 void cpufreq_update_limits(unsigned int cpu);
209 bool have_governor_per_policy(void);
210 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
211 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
212 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
214 static inline unsigned int cpufreq_get(unsigned int cpu)
218 static inline unsigned int cpufreq_quick_get(unsigned int cpu)
222 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
226 static inline void disable_cpufreq(void) { }
229 #ifdef CONFIG_CPU_FREQ_STAT
230 void cpufreq_stats_create_table(struct cpufreq_policy *policy);
231 void cpufreq_stats_free_table(struct cpufreq_policy *policy);
232 void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
233 unsigned int new_freq);
235 static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { }
236 static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { }
237 static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
238 unsigned int new_freq) { }
239 #endif /* CONFIG_CPU_FREQ_STAT */
241 /*********************************************************************
242 * CPUFREQ DRIVER INTERFACE *
243 *********************************************************************/
245 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
246 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
247 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */
250 struct attribute attr;
251 ssize_t (*show)(struct cpufreq_policy *, char *);
252 ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
255 #define cpufreq_freq_attr_ro(_name) \
256 static struct freq_attr _name = \
257 __ATTR(_name, 0444, show_##_name, NULL)
259 #define cpufreq_freq_attr_ro_perm(_name, _perm) \
260 static struct freq_attr _name = \
261 __ATTR(_name, _perm, show_##_name, NULL)
263 #define cpufreq_freq_attr_rw(_name) \
264 static struct freq_attr _name = \
265 __ATTR(_name, 0644, show_##_name, store_##_name)
267 #define cpufreq_freq_attr_wo(_name) \
268 static struct freq_attr _name = \
269 __ATTR(_name, 0200, NULL, store_##_name)
271 #define define_one_global_ro(_name) \
272 static struct kobj_attribute _name = \
273 __ATTR(_name, 0444, show_##_name, NULL)
275 #define define_one_global_rw(_name) \
276 static struct kobj_attribute _name = \
277 __ATTR(_name, 0644, show_##_name, store_##_name)
280 struct cpufreq_driver {
281 char name[CPUFREQ_NAME_LEN];
285 /* needed by all drivers */
286 int (*init)(struct cpufreq_policy *policy);
287 int (*verify)(struct cpufreq_policy *policy);
289 /* define one out of two */
290 int (*setpolicy)(struct cpufreq_policy *policy);
293 * On failure, should always restore frequency to policy->restore_freq
296 int (*target)(struct cpufreq_policy *policy,
297 unsigned int target_freq,
298 unsigned int relation); /* Deprecated */
299 int (*target_index)(struct cpufreq_policy *policy,
301 unsigned int (*fast_switch)(struct cpufreq_policy *policy,
302 unsigned int target_freq);
305 * Caches and returns the lowest driver-supported frequency greater than
306 * or equal to the target frequency, subject to any driver limitations.
307 * Does not set the frequency. Only to be implemented for drivers with
310 unsigned int (*resolve_freq)(struct cpufreq_policy *policy,
311 unsigned int target_freq);
314 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
317 * get_intermediate should return a stable intermediate frequency
318 * platform wants to switch to and target_intermediate() should set CPU
319 * to to that frequency, before jumping to the frequency corresponding
320 * to 'index'. Core will take care of sending notifications and driver
321 * doesn't have to handle them in target_intermediate() or
324 * Drivers can return '0' from get_intermediate() in case they don't
325 * wish to switch to intermediate frequency for some target frequency.
326 * In that case core will directly call ->target_index().
328 unsigned int (*get_intermediate)(struct cpufreq_policy *policy,
330 int (*target_intermediate)(struct cpufreq_policy *policy,
333 /* should be defined, if possible */
334 unsigned int (*get)(unsigned int cpu);
336 /* Called to update policy limits on firmware notifications. */
337 void (*update_limits)(unsigned int cpu);
340 int (*bios_limit)(int cpu, unsigned int *limit);
342 int (*online)(struct cpufreq_policy *policy);
343 int (*offline)(struct cpufreq_policy *policy);
344 int (*exit)(struct cpufreq_policy *policy);
345 void (*stop_cpu)(struct cpufreq_policy *policy);
346 int (*suspend)(struct cpufreq_policy *policy);
347 int (*resume)(struct cpufreq_policy *policy);
349 /* Will be called after the driver is fully initialized */
350 void (*ready)(struct cpufreq_policy *policy);
352 struct freq_attr **attr;
354 /* platform specific boost support code */
356 int (*set_boost)(int state);
361 /* driver isn't removed even if all ->init() calls failed */
362 #define CPUFREQ_STICKY BIT(0)
364 /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
365 #define CPUFREQ_CONST_LOOPS BIT(1)
367 /* don't warn on suspend/resume speed mismatches */
368 #define CPUFREQ_PM_NO_WARN BIT(2)
371 * This should be set by platforms having multiple clock-domains, i.e.
372 * supporting multiple policies. With this sysfs directories of governor would
373 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
374 * governor with different tunables for different clusters.
376 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3)
379 * Driver will do POSTCHANGE notifications from outside of their ->target()
380 * routine and so must set cpufreq_driver->flags with this flag, so that core
381 * can handle them specially.
383 #define CPUFREQ_ASYNC_NOTIFICATION BIT(4)
386 * Set by drivers which want cpufreq core to check if CPU is running at a
387 * frequency present in freq-table exposed by the driver. For these drivers if
388 * CPU is found running at an out of table freq, we will try to set it to a freq
389 * from the table. And if that fails, we will stop further boot process by
390 * issuing a BUG_ON().
392 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
395 * Set by drivers to disallow use of governors with "dynamic_switching" flag
398 #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6)
401 * Set by drivers that want the core to automatically register the cpufreq
402 * driver as a thermal cooling device.
404 #define CPUFREQ_IS_COOLING_DEV BIT(7)
406 int cpufreq_register_driver(struct cpufreq_driver *driver_data);
407 int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
409 const char *cpufreq_get_current_driver(void);
410 void *cpufreq_get_driver_data(void);
412 static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv)
414 return IS_ENABLED(CONFIG_CPU_THERMAL) &&
415 (drv->flags & CPUFREQ_IS_COOLING_DEV);
418 static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
419 unsigned int min, unsigned int max)
421 if (policy->min < min)
423 if (policy->max < min)
425 if (policy->min > max)
427 if (policy->max > max)
429 if (policy->min > policy->max)
430 policy->min = policy->max;
435 cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy)
437 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
438 policy->cpuinfo.max_freq);
441 #ifdef CONFIG_CPU_FREQ
442 void cpufreq_suspend(void);
443 void cpufreq_resume(void);
444 int cpufreq_generic_suspend(struct cpufreq_policy *policy);
446 static inline void cpufreq_suspend(void) {}
447 static inline void cpufreq_resume(void) {}
450 /*********************************************************************
451 * CPUFREQ NOTIFIER INTERFACE *
452 *********************************************************************/
454 #define CPUFREQ_TRANSITION_NOTIFIER (0)
455 #define CPUFREQ_POLICY_NOTIFIER (1)
457 /* Transition notifiers */
458 #define CPUFREQ_PRECHANGE (0)
459 #define CPUFREQ_POSTCHANGE (1)
461 /* Policy Notifiers */
462 #define CPUFREQ_CREATE_POLICY (0)
463 #define CPUFREQ_REMOVE_POLICY (1)
465 #ifdef CONFIG_CPU_FREQ
466 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
467 int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
469 void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
470 struct cpufreq_freqs *freqs);
471 void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
472 struct cpufreq_freqs *freqs, int transition_failed);
474 #else /* CONFIG_CPU_FREQ */
475 static inline int cpufreq_register_notifier(struct notifier_block *nb,
480 static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
485 #endif /* !CONFIG_CPU_FREQ */
488 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
495 * new = old * mult / div
497 static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
500 #if BITS_PER_LONG == 32
501 u64 result = ((u64) old) * ((u64) mult);
503 return (unsigned long) result;
505 #elif BITS_PER_LONG == 64
506 unsigned long result = old * ((u64) mult);
512 /*********************************************************************
513 * CPUFREQ GOVERNORS *
514 *********************************************************************/
517 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
518 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
519 * two generic policies are available:
521 #define CPUFREQ_POLICY_POWERSAVE (1)
522 #define CPUFREQ_POLICY_PERFORMANCE (2)
525 * The polling frequency depends on the capability of the processor. Default
526 * polling frequency is 1000 times the transition latency of the processor. The
527 * ondemand governor will work on any processor with transition latency <= 10ms,
528 * using appropriate sampling rate.
530 #define LATENCY_MULTIPLIER (1000)
532 struct cpufreq_governor {
533 char name[CPUFREQ_NAME_LEN];
534 int (*init)(struct cpufreq_policy *policy);
535 void (*exit)(struct cpufreq_policy *policy);
536 int (*start)(struct cpufreq_policy *policy);
537 void (*stop)(struct cpufreq_policy *policy);
538 void (*limits)(struct cpufreq_policy *policy);
539 ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
541 int (*store_setspeed) (struct cpufreq_policy *policy,
543 /* For governors which change frequency dynamically by themselves */
544 bool dynamic_switching;
545 struct list_head governor_list;
546 struct module *owner;
549 /* Pass a target to the cpufreq driver */
550 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
551 unsigned int target_freq);
552 int cpufreq_driver_target(struct cpufreq_policy *policy,
553 unsigned int target_freq,
554 unsigned int relation);
555 int __cpufreq_driver_target(struct cpufreq_policy *policy,
556 unsigned int target_freq,
557 unsigned int relation);
558 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
559 unsigned int target_freq);
560 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
561 int cpufreq_register_governor(struct cpufreq_governor *governor);
562 void cpufreq_unregister_governor(struct cpufreq_governor *governor);
564 struct cpufreq_governor *cpufreq_default_governor(void);
565 struct cpufreq_governor *cpufreq_fallback_governor(void);
567 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
569 if (policy->max < policy->cur)
570 __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
571 else if (policy->min > policy->cur)
572 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
575 /* Governor attribute set */
576 struct gov_attr_set {
578 struct list_head policy_list;
579 struct mutex update_lock;
583 /* sysfs ops for cpufreq governors */
584 extern const struct sysfs_ops governor_sysfs_ops;
586 void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node);
587 void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node);
588 unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node);
590 /* Governor sysfs attribute */
591 struct governor_attr {
592 struct attribute attr;
593 ssize_t (*show)(struct gov_attr_set *attr_set, char *buf);
594 ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf,
598 /*********************************************************************
599 * FREQUENCY TABLE HELPERS *
600 *********************************************************************/
602 /* Special Values of .frequency field */
603 #define CPUFREQ_ENTRY_INVALID ~0u
604 #define CPUFREQ_TABLE_END ~1u
605 /* Special Values of .flags field */
606 #define CPUFREQ_BOOST_FREQ (1 << 0)
608 struct cpufreq_frequency_table {
610 unsigned int driver_data; /* driver specific data, not used by core */
611 unsigned int frequency; /* kHz - doesn't need to be in ascending
615 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
616 int dev_pm_opp_init_cpufreq_table(struct device *dev,
617 struct cpufreq_frequency_table **table);
618 void dev_pm_opp_free_cpufreq_table(struct device *dev,
619 struct cpufreq_frequency_table **table);
621 static inline int dev_pm_opp_init_cpufreq_table(struct device *dev,
622 struct cpufreq_frequency_table
628 static inline void dev_pm_opp_free_cpufreq_table(struct device *dev,
629 struct cpufreq_frequency_table
636 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
637 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
638 * @table: the cpufreq_frequency_table * to iterate over.
641 #define cpufreq_for_each_entry(pos, table) \
642 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
645 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
647 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
648 * @table: the cpufreq_frequency_table * to iterate over.
649 * @idx: the table entry currently being processed
652 #define cpufreq_for_each_entry_idx(pos, table, idx) \
653 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
657 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
658 * excluding CPUFREQ_ENTRY_INVALID frequencies.
659 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
660 * @table: the cpufreq_frequency_table * to iterate over.
663 #define cpufreq_for_each_valid_entry(pos, table) \
664 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
665 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
670 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
671 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
672 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
673 * @table: the cpufreq_frequency_table * to iterate over.
674 * @idx: the table entry currently being processed
677 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
678 cpufreq_for_each_entry_idx(pos, table, idx) \
679 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
684 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
685 struct cpufreq_frequency_table *table);
687 int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
688 struct cpufreq_frequency_table *table);
689 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy);
691 int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
692 unsigned int target_freq,
693 unsigned int relation);
694 int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
697 ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
699 #ifdef CONFIG_CPU_FREQ
700 int cpufreq_boost_trigger_state(int state);
701 int cpufreq_boost_enabled(void);
702 int cpufreq_enable_boost_support(void);
703 bool policy_has_boost_freq(struct cpufreq_policy *policy);
705 /* Find lowest freq at or above target in a table in ascending order */
706 static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy,
707 unsigned int target_freq)
709 struct cpufreq_frequency_table *table = policy->freq_table;
710 struct cpufreq_frequency_table *pos;
714 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
715 freq = pos->frequency;
717 if (freq >= target_freq)
726 /* Find lowest freq at or above target in a table in descending order */
727 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy,
728 unsigned int target_freq)
730 struct cpufreq_frequency_table *table = policy->freq_table;
731 struct cpufreq_frequency_table *pos;
735 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
736 freq = pos->frequency;
738 if (freq == target_freq)
741 if (freq > target_freq) {
746 /* No freq found above target_freq */
756 /* Works only on sorted freq-tables */
757 static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy,
758 unsigned int target_freq)
760 target_freq = clamp_val(target_freq, policy->min, policy->max);
762 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
763 return cpufreq_table_find_index_al(policy, target_freq);
765 return cpufreq_table_find_index_dl(policy, target_freq);
768 /* Find highest freq at or below target in a table in ascending order */
769 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy,
770 unsigned int target_freq)
772 struct cpufreq_frequency_table *table = policy->freq_table;
773 struct cpufreq_frequency_table *pos;
777 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
778 freq = pos->frequency;
780 if (freq == target_freq)
783 if (freq < target_freq) {
788 /* No freq found below target_freq */
798 /* Find highest freq at or below target in a table in descending order */
799 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy,
800 unsigned int target_freq)
802 struct cpufreq_frequency_table *table = policy->freq_table;
803 struct cpufreq_frequency_table *pos;
807 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
808 freq = pos->frequency;
810 if (freq <= target_freq)
819 /* Works only on sorted freq-tables */
820 static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy,
821 unsigned int target_freq)
823 target_freq = clamp_val(target_freq, policy->min, policy->max);
825 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
826 return cpufreq_table_find_index_ah(policy, target_freq);
828 return cpufreq_table_find_index_dh(policy, target_freq);
831 /* Find closest freq to target in a table in ascending order */
832 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy,
833 unsigned int target_freq)
835 struct cpufreq_frequency_table *table = policy->freq_table;
836 struct cpufreq_frequency_table *pos;
840 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
841 freq = pos->frequency;
843 if (freq == target_freq)
846 if (freq < target_freq) {
851 /* No freq found below target_freq */
855 /* Choose the closest freq */
856 if (target_freq - table[best].frequency > freq - target_freq)
865 /* Find closest freq to target in a table in descending order */
866 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy,
867 unsigned int target_freq)
869 struct cpufreq_frequency_table *table = policy->freq_table;
870 struct cpufreq_frequency_table *pos;
874 cpufreq_for_each_valid_entry_idx(pos, table, idx) {
875 freq = pos->frequency;
877 if (freq == target_freq)
880 if (freq > target_freq) {
885 /* No freq found above target_freq */
889 /* Choose the closest freq */
890 if (table[best].frequency - target_freq > target_freq - freq)
899 /* Works only on sorted freq-tables */
900 static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy,
901 unsigned int target_freq)
903 target_freq = clamp_val(target_freq, policy->min, policy->max);
905 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
906 return cpufreq_table_find_index_ac(policy, target_freq);
908 return cpufreq_table_find_index_dc(policy, target_freq);
911 static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
912 unsigned int target_freq,
913 unsigned int relation)
915 if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED))
916 return cpufreq_table_index_unsorted(policy, target_freq,
920 case CPUFREQ_RELATION_L:
921 return cpufreq_table_find_index_l(policy, target_freq);
922 case CPUFREQ_RELATION_H:
923 return cpufreq_table_find_index_h(policy, target_freq);
924 case CPUFREQ_RELATION_C:
925 return cpufreq_table_find_index_c(policy, target_freq);
927 pr_err("%s: Invalid relation: %d\n", __func__, relation);
932 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy)
934 struct cpufreq_frequency_table *pos;
937 if (unlikely(!policy->freq_table))
940 cpufreq_for_each_valid_entry(pos, policy->freq_table)
946 static inline int cpufreq_boost_trigger_state(int state)
950 static inline int cpufreq_boost_enabled(void)
955 static inline int cpufreq_enable_boost_support(void)
960 static inline bool policy_has_boost_freq(struct cpufreq_policy *policy)
966 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
967 void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
968 struct cpufreq_governor *old_gov);
970 static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
971 struct cpufreq_governor *old_gov) { }
974 extern void arch_freq_prepare_all(void);
975 extern unsigned int arch_freq_get_on_cpu(int cpu);
977 extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
978 unsigned long max_freq);
980 /* the following are really really optional */
981 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
982 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;
983 extern struct freq_attr *cpufreq_generic_attr[];
984 int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy);
986 unsigned int cpufreq_generic_get(unsigned int cpu);
987 void cpufreq_generic_init(struct cpufreq_policy *policy,
988 struct cpufreq_frequency_table *table,
989 unsigned int transition_latency);
990 #endif /* _LINUX_CPUFREQ_H */