2 * linux/include/linux/cpufreq.h
4 * Copyright (C) 2001 Russell King
5 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #ifndef _LINUX_CPUFREQ_H
12 #define _LINUX_CPUFREQ_H
14 #include <linux/clk.h>
15 #include <linux/cpumask.h>
16 #include <linux/completion.h>
17 #include <linux/kobject.h>
18 #include <linux/notifier.h>
19 #include <linux/spinlock.h>
20 #include <linux/sysfs.h>
22 /*********************************************************************
24 *********************************************************************/
26 * Frequency values here are CPU kHz
28 * Maximum transition latency is in nanoseconds - if it's unknown,
29 * CPUFREQ_ETERNAL shall be used.
32 #define CPUFREQ_ETERNAL (-1)
33 #define CPUFREQ_NAME_LEN 16
34 /* Print length for names. Extra 1 space for accommodating '\n' in prints */
35 #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
37 struct cpufreq_governor
;
39 enum cpufreq_table_sorting
{
40 CPUFREQ_TABLE_UNSORTED
,
41 CPUFREQ_TABLE_SORTED_ASCENDING
,
42 CPUFREQ_TABLE_SORTED_DESCENDING
45 struct cpufreq_cpuinfo
{
46 unsigned int max_freq
;
47 unsigned int min_freq
;
49 /* in 10^(-9) s = nanoseconds */
50 unsigned int transition_latency
;
53 struct cpufreq_user_policy
{
54 unsigned int min
; /* in kHz */
55 unsigned int max
; /* in kHz */
58 struct cpufreq_policy
{
59 /* CPUs sharing clock, require sw coordination */
60 cpumask_var_t cpus
; /* Online CPUs only */
61 cpumask_var_t related_cpus
; /* Online + Offline CPUs */
62 cpumask_var_t real_cpus
; /* Related and present */
64 unsigned int shared_type
; /* ACPI: ANY or ALL affected CPUs
66 unsigned int cpu
; /* cpu managing this policy, must be online */
69 struct cpufreq_cpuinfo cpuinfo
;/* see above */
71 unsigned int min
; /* in kHz */
72 unsigned int max
; /* in kHz */
73 unsigned int cur
; /* in kHz, only needed if cpufreq
74 * governors are used */
75 unsigned int restore_freq
; /* = policy->cur before transition */
76 unsigned int suspend_freq
; /* freq to set during suspend */
78 unsigned int policy
; /* see above */
79 unsigned int last_policy
; /* policy before unplug */
80 struct cpufreq_governor
*governor
; /* see below */
82 char last_governor
[CPUFREQ_NAME_LEN
]; /* last governor used */
84 struct work_struct update
; /* if update_policy() needs to be
85 * called, but you're in IRQ context */
87 struct cpufreq_user_policy user_policy
;
88 struct cpufreq_frequency_table
*freq_table
;
89 enum cpufreq_table_sorting freq_table_sorted
;
91 struct list_head policy_list
;
93 struct completion kobj_unregister
;
96 * The rules for this semaphore:
97 * - Any routine that wants to read from the policy structure will
98 * do a down_read on this semaphore.
99 * - Any routine that will write to the policy structure and/or may take away
100 * the policy altogether (eg. CPU hotplug), will hold this lock in write
101 * mode before doing so.
103 struct rw_semaphore rwsem
;
107 * - fast_switch_possible should be set by the driver if it can
108 * guarantee that frequency can be changed on any CPU sharing the
109 * policy and that the change will affect all of the policy CPUs then.
110 * - fast_switch_enabled is to be set by governors that support fast
111 * frequency switching with the help of cpufreq_enable_fast_switch().
113 bool fast_switch_possible
;
114 bool fast_switch_enabled
;
117 * Preferred average time interval between consecutive invocations of
118 * the driver to set the frequency for this policy. To be set by the
119 * scaling driver (0, which is the default, means no preference).
121 unsigned int transition_delay_us
;
124 * Remote DVFS flag (Not added to the driver structure as we don't want
125 * to access another structure from scheduler hotpath).
127 * Should be set if CPUs can do DVFS on behalf of other CPUs from
128 * different cpufreq policies.
130 bool dvfs_possible_from_any_cpu
;
132 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
133 unsigned int cached_target_freq
;
134 int cached_resolved_idx
;
136 /* Synchronization for frequency transitions */
137 bool transition_ongoing
; /* Tracks transition status */
138 spinlock_t transition_lock
;
139 wait_queue_head_t transition_wait
;
140 struct task_struct
*transition_task
; /* Task which is doing the transition */
143 struct cpufreq_stats
*stats
;
145 /* For cpufreq driver's internal use */
148 /* Pointer to the cooling device if used for thermal mitigation */
149 struct thermal_cooling_device
*cdev
;
152 struct cpufreq_freqs
{
153 struct cpufreq_policy
*policy
;
156 u8 flags
; /* flags of cpufreq_driver, see below. */
160 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
161 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
162 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
163 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
165 #ifdef CONFIG_CPU_FREQ
166 struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
);
167 struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
);
168 void cpufreq_cpu_put(struct cpufreq_policy
*policy
);
170 static inline struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
)
174 static inline struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
)
178 static inline void cpufreq_cpu_put(struct cpufreq_policy
*policy
) { }
181 static inline bool policy_is_inactive(struct cpufreq_policy
*policy
)
183 return cpumask_empty(policy
->cpus
);
186 static inline bool policy_is_shared(struct cpufreq_policy
*policy
)
188 return cpumask_weight(policy
->cpus
) > 1;
191 /* /sys/devices/system/cpu/cpufreq: entry point for global variables */
192 extern struct kobject
*cpufreq_global_kobject
;
194 #ifdef CONFIG_CPU_FREQ
195 unsigned int cpufreq_get(unsigned int cpu
);
196 unsigned int cpufreq_quick_get(unsigned int cpu
);
197 unsigned int cpufreq_quick_get_max(unsigned int cpu
);
198 void disable_cpufreq(void);
200 u64
get_cpu_idle_time(unsigned int cpu
, u64
*wall
, int io_busy
);
202 struct cpufreq_policy
*cpufreq_cpu_acquire(unsigned int cpu
);
203 void cpufreq_cpu_release(struct cpufreq_policy
*policy
);
204 int cpufreq_get_policy(struct cpufreq_policy
*policy
, unsigned int cpu
);
205 int cpufreq_set_policy(struct cpufreq_policy
*policy
,
206 struct cpufreq_policy
*new_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 void cpufreq_verify_within_limits(struct cpufreq_policy
*policy
,
413 unsigned int min
, unsigned int max
)
415 if (policy
->min
< min
)
417 if (policy
->max
< min
)
419 if (policy
->min
> max
)
421 if (policy
->max
> max
)
423 if (policy
->min
> policy
->max
)
424 policy
->min
= policy
->max
;
429 cpufreq_verify_within_cpu_limits(struct cpufreq_policy
*policy
)
431 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
,
432 policy
->cpuinfo
.max_freq
);
435 #ifdef CONFIG_CPU_FREQ
436 void cpufreq_suspend(void);
437 void cpufreq_resume(void);
438 int cpufreq_generic_suspend(struct cpufreq_policy
*policy
);
440 static inline void cpufreq_suspend(void) {}
441 static inline void cpufreq_resume(void) {}
444 /*********************************************************************
445 * CPUFREQ NOTIFIER INTERFACE *
446 *********************************************************************/
448 #define CPUFREQ_TRANSITION_NOTIFIER (0)
449 #define CPUFREQ_POLICY_NOTIFIER (1)
451 /* Transition notifiers */
452 #define CPUFREQ_PRECHANGE (0)
453 #define CPUFREQ_POSTCHANGE (1)
455 /* Policy Notifiers */
456 #define CPUFREQ_ADJUST (0)
457 #define CPUFREQ_NOTIFY (1)
459 #ifdef CONFIG_CPU_FREQ
460 int cpufreq_register_notifier(struct notifier_block
*nb
, unsigned int list
);
461 int cpufreq_unregister_notifier(struct notifier_block
*nb
, unsigned int list
);
463 void cpufreq_freq_transition_begin(struct cpufreq_policy
*policy
,
464 struct cpufreq_freqs
*freqs
);
465 void cpufreq_freq_transition_end(struct cpufreq_policy
*policy
,
466 struct cpufreq_freqs
*freqs
, int transition_failed
);
468 #else /* CONFIG_CPU_FREQ */
469 static inline int cpufreq_register_notifier(struct notifier_block
*nb
,
474 static inline int cpufreq_unregister_notifier(struct notifier_block
*nb
,
479 #endif /* !CONFIG_CPU_FREQ */
482 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
489 * new = old * mult / div
491 static inline unsigned long cpufreq_scale(unsigned long old
, u_int div
,
494 #if BITS_PER_LONG == 32
495 u64 result
= ((u64
) old
) * ((u64
) mult
);
497 return (unsigned long) result
;
499 #elif BITS_PER_LONG == 64
500 unsigned long result
= old
* ((u64
) mult
);
506 /*********************************************************************
507 * CPUFREQ GOVERNORS *
508 *********************************************************************/
511 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
512 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
513 * two generic policies are available:
515 #define CPUFREQ_POLICY_POWERSAVE (1)
516 #define CPUFREQ_POLICY_PERFORMANCE (2)
519 * The polling frequency depends on the capability of the processor. Default
520 * polling frequency is 1000 times the transition latency of the processor. The
521 * ondemand governor will work on any processor with transition latency <= 10ms,
522 * using appropriate sampling rate.
524 #define LATENCY_MULTIPLIER (1000)
526 struct cpufreq_governor
{
527 char name
[CPUFREQ_NAME_LEN
];
528 int (*init
)(struct cpufreq_policy
*policy
);
529 void (*exit
)(struct cpufreq_policy
*policy
);
530 int (*start
)(struct cpufreq_policy
*policy
);
531 void (*stop
)(struct cpufreq_policy
*policy
);
532 void (*limits
)(struct cpufreq_policy
*policy
);
533 ssize_t (*show_setspeed
) (struct cpufreq_policy
*policy
,
535 int (*store_setspeed
) (struct cpufreq_policy
*policy
,
537 /* For governors which change frequency dynamically by themselves */
538 bool dynamic_switching
;
539 struct list_head governor_list
;
540 struct module
*owner
;
543 /* Pass a target to the cpufreq driver */
544 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy
*policy
,
545 unsigned int target_freq
);
546 int cpufreq_driver_target(struct cpufreq_policy
*policy
,
547 unsigned int target_freq
,
548 unsigned int relation
);
549 int __cpufreq_driver_target(struct cpufreq_policy
*policy
,
550 unsigned int target_freq
,
551 unsigned int relation
);
552 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy
*policy
,
553 unsigned int target_freq
);
554 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy
*policy
);
555 int cpufreq_register_governor(struct cpufreq_governor
*governor
);
556 void cpufreq_unregister_governor(struct cpufreq_governor
*governor
);
558 struct cpufreq_governor
*cpufreq_default_governor(void);
559 struct cpufreq_governor
*cpufreq_fallback_governor(void);
561 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy
*policy
)
563 if (policy
->max
< policy
->cur
)
564 __cpufreq_driver_target(policy
, policy
->max
, CPUFREQ_RELATION_H
);
565 else if (policy
->min
> policy
->cur
)
566 __cpufreq_driver_target(policy
, policy
->min
, CPUFREQ_RELATION_L
);
569 /* Governor attribute set */
570 struct gov_attr_set
{
572 struct list_head policy_list
;
573 struct mutex update_lock
;
577 /* sysfs ops for cpufreq governors */
578 extern const struct sysfs_ops governor_sysfs_ops
;
580 void gov_attr_set_init(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
581 void gov_attr_set_get(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
582 unsigned int gov_attr_set_put(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
584 /* Governor sysfs attribute */
585 struct governor_attr
{
586 struct attribute attr
;
587 ssize_t (*show
)(struct gov_attr_set
*attr_set
, char *buf
);
588 ssize_t (*store
)(struct gov_attr_set
*attr_set
, const char *buf
,
592 static inline bool cpufreq_this_cpu_can_update(struct cpufreq_policy
*policy
)
595 * Allow remote callbacks if:
596 * - dvfs_possible_from_any_cpu flag is set
597 * - the local and remote CPUs share cpufreq policy
599 return policy
->dvfs_possible_from_any_cpu
||
600 cpumask_test_cpu(smp_processor_id(), policy
->cpus
);
603 /*********************************************************************
604 * FREQUENCY TABLE HELPERS *
605 *********************************************************************/
607 /* Special Values of .frequency field */
608 #define CPUFREQ_ENTRY_INVALID ~0u
609 #define CPUFREQ_TABLE_END ~1u
610 /* Special Values of .flags field */
611 #define CPUFREQ_BOOST_FREQ (1 << 0)
613 struct cpufreq_frequency_table
{
615 unsigned int driver_data
; /* driver specific data, not used by core */
616 unsigned int frequency
; /* kHz - doesn't need to be in ascending
620 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
621 int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
622 struct cpufreq_frequency_table
**table
);
623 void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
624 struct cpufreq_frequency_table
**table
);
626 static inline int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
627 struct cpufreq_frequency_table
633 static inline void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
634 struct cpufreq_frequency_table
641 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
642 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
643 * @table: the cpufreq_frequency_table * to iterate over.
646 #define cpufreq_for_each_entry(pos, table) \
647 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
650 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
652 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
653 * @table: the cpufreq_frequency_table * to iterate over.
654 * @idx: the table entry currently being processed
657 #define cpufreq_for_each_entry_idx(pos, table, idx) \
658 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
662 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
663 * excluding CPUFREQ_ENTRY_INVALID frequencies.
664 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
665 * @table: the cpufreq_frequency_table * to iterate over.
668 #define cpufreq_for_each_valid_entry(pos, table) \
669 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
670 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
675 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
676 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
677 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
678 * @table: the cpufreq_frequency_table * to iterate over.
679 * @idx: the table entry currently being processed
682 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
683 cpufreq_for_each_entry_idx(pos, table, idx) \
684 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
689 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy
*policy
,
690 struct cpufreq_frequency_table
*table
);
692 int cpufreq_frequency_table_verify(struct cpufreq_policy
*policy
,
693 struct cpufreq_frequency_table
*table
);
694 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy
*policy
);
696 int cpufreq_table_index_unsorted(struct cpufreq_policy
*policy
,
697 unsigned int target_freq
,
698 unsigned int relation
);
699 int cpufreq_frequency_table_get_index(struct cpufreq_policy
*policy
,
702 ssize_t
cpufreq_show_cpus(const struct cpumask
*mask
, char *buf
);
704 #ifdef CONFIG_CPU_FREQ
705 int cpufreq_boost_trigger_state(int state
);
706 int cpufreq_boost_enabled(void);
707 int cpufreq_enable_boost_support(void);
708 bool policy_has_boost_freq(struct cpufreq_policy
*policy
);
710 /* Find lowest freq at or above target in a table in ascending order */
711 static inline int cpufreq_table_find_index_al(struct cpufreq_policy
*policy
,
712 unsigned int target_freq
)
714 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
715 struct cpufreq_frequency_table
*pos
;
719 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
720 freq
= pos
->frequency
;
722 if (freq
>= target_freq
)
731 /* Find lowest freq at or above target in a table in descending order */
732 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy
*policy
,
733 unsigned int target_freq
)
735 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
736 struct cpufreq_frequency_table
*pos
;
740 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
741 freq
= pos
->frequency
;
743 if (freq
== target_freq
)
746 if (freq
> target_freq
) {
751 /* No freq found above target_freq */
761 /* Works only on sorted freq-tables */
762 static inline int cpufreq_table_find_index_l(struct cpufreq_policy
*policy
,
763 unsigned int target_freq
)
765 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
767 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
768 return cpufreq_table_find_index_al(policy
, target_freq
);
770 return cpufreq_table_find_index_dl(policy
, target_freq
);
773 /* Find highest freq at or below target in a table in ascending order */
774 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy
*policy
,
775 unsigned int target_freq
)
777 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
778 struct cpufreq_frequency_table
*pos
;
782 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
783 freq
= pos
->frequency
;
785 if (freq
== target_freq
)
788 if (freq
< target_freq
) {
793 /* No freq found below target_freq */
803 /* Find highest freq at or below target in a table in descending order */
804 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy
*policy
,
805 unsigned int target_freq
)
807 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
808 struct cpufreq_frequency_table
*pos
;
812 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
813 freq
= pos
->frequency
;
815 if (freq
<= target_freq
)
824 /* Works only on sorted freq-tables */
825 static inline int cpufreq_table_find_index_h(struct cpufreq_policy
*policy
,
826 unsigned int target_freq
)
828 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
830 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
831 return cpufreq_table_find_index_ah(policy
, target_freq
);
833 return cpufreq_table_find_index_dh(policy
, target_freq
);
836 /* Find closest freq to target in a table in ascending order */
837 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy
*policy
,
838 unsigned int target_freq
)
840 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
841 struct cpufreq_frequency_table
*pos
;
845 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
846 freq
= pos
->frequency
;
848 if (freq
== target_freq
)
851 if (freq
< target_freq
) {
856 /* No freq found below target_freq */
860 /* Choose the closest freq */
861 if (target_freq
- table
[best
].frequency
> freq
- target_freq
)
870 /* Find closest freq to target in a table in descending order */
871 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy
*policy
,
872 unsigned int target_freq
)
874 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
875 struct cpufreq_frequency_table
*pos
;
879 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
880 freq
= pos
->frequency
;
882 if (freq
== target_freq
)
885 if (freq
> target_freq
) {
890 /* No freq found above target_freq */
894 /* Choose the closest freq */
895 if (table
[best
].frequency
- target_freq
> target_freq
- freq
)
904 /* Works only on sorted freq-tables */
905 static inline int cpufreq_table_find_index_c(struct cpufreq_policy
*policy
,
906 unsigned int target_freq
)
908 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
910 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
911 return cpufreq_table_find_index_ac(policy
, target_freq
);
913 return cpufreq_table_find_index_dc(policy
, target_freq
);
916 static inline int cpufreq_frequency_table_target(struct cpufreq_policy
*policy
,
917 unsigned int target_freq
,
918 unsigned int relation
)
920 if (unlikely(policy
->freq_table_sorted
== CPUFREQ_TABLE_UNSORTED
))
921 return cpufreq_table_index_unsorted(policy
, target_freq
,
925 case CPUFREQ_RELATION_L
:
926 return cpufreq_table_find_index_l(policy
, target_freq
);
927 case CPUFREQ_RELATION_H
:
928 return cpufreq_table_find_index_h(policy
, target_freq
);
929 case CPUFREQ_RELATION_C
:
930 return cpufreq_table_find_index_c(policy
, target_freq
);
932 pr_err("%s: Invalid relation: %d\n", __func__
, relation
);
937 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy
*policy
)
939 struct cpufreq_frequency_table
*pos
;
942 if (unlikely(!policy
->freq_table
))
945 cpufreq_for_each_valid_entry(pos
, policy
->freq_table
)
951 static inline int cpufreq_boost_trigger_state(int state
)
955 static inline int cpufreq_boost_enabled(void)
960 static inline int cpufreq_enable_boost_support(void)
965 static inline bool policy_has_boost_freq(struct cpufreq_policy
*policy
)
971 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
972 void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
973 struct cpufreq_governor
*old_gov
);
975 static inline void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
976 struct cpufreq_governor
*old_gov
) { }
979 extern void arch_freq_prepare_all(void);
980 extern unsigned int arch_freq_get_on_cpu(int cpu
);
982 extern void arch_set_freq_scale(struct cpumask
*cpus
, unsigned long cur_freq
,
983 unsigned long max_freq
);
985 /* the following are really really optional */
986 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs
;
987 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs
;
988 extern struct freq_attr
*cpufreq_generic_attr
[];
989 int cpufreq_table_validate_and_sort(struct cpufreq_policy
*policy
);
991 unsigned int cpufreq_generic_get(unsigned int cpu
);
992 int cpufreq_generic_init(struct cpufreq_policy
*policy
,
993 struct cpufreq_frequency_table
*table
,
994 unsigned int transition_latency
);
995 #endif /* _LINUX_CPUFREQ_H */