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
;
152 * Used for passing new cpufreq policy data to the cpufreq driver's ->verify()
153 * callback for sanitization. That callback is only expected to modify the min
154 * and max values, if necessary, and specifically it must not update the
157 struct cpufreq_policy_data
{
158 struct cpufreq_cpuinfo cpuinfo
;
159 struct cpufreq_frequency_table
*freq_table
;
161 unsigned int min
; /* in kHz */
162 unsigned int max
; /* in kHz */
165 struct cpufreq_freqs
{
166 struct cpufreq_policy
*policy
;
169 u8 flags
; /* flags of cpufreq_driver, see below. */
173 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
174 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
175 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
176 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
178 #ifdef CONFIG_CPU_FREQ
179 struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
);
180 struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
);
181 void cpufreq_cpu_put(struct cpufreq_policy
*policy
);
183 static inline struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
)
187 static inline struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
)
191 static inline void cpufreq_cpu_put(struct cpufreq_policy
*policy
) { }
194 static inline bool policy_is_inactive(struct cpufreq_policy
*policy
)
196 return cpumask_empty(policy
->cpus
);
199 static inline bool policy_is_shared(struct cpufreq_policy
*policy
)
201 return cpumask_weight(policy
->cpus
) > 1;
204 #ifdef CONFIG_CPU_FREQ
205 unsigned int cpufreq_get(unsigned int cpu
);
206 unsigned int cpufreq_quick_get(unsigned int cpu
);
207 unsigned int cpufreq_quick_get_max(unsigned int cpu
);
208 unsigned int cpufreq_get_hw_max_freq(unsigned int cpu
);
209 void disable_cpufreq(void);
211 u64
get_cpu_idle_time(unsigned int cpu
, u64
*wall
, int io_busy
);
213 struct cpufreq_policy
*cpufreq_cpu_acquire(unsigned int cpu
);
214 void cpufreq_cpu_release(struct cpufreq_policy
*policy
);
215 int cpufreq_get_policy(struct cpufreq_policy
*policy
, unsigned int cpu
);
216 void refresh_frequency_limits(struct cpufreq_policy
*policy
);
217 void cpufreq_update_policy(unsigned int cpu
);
218 void cpufreq_update_limits(unsigned int cpu
);
219 bool have_governor_per_policy(void);
220 struct kobject
*get_governor_parent_kobj(struct cpufreq_policy
*policy
);
221 void cpufreq_enable_fast_switch(struct cpufreq_policy
*policy
);
222 void cpufreq_disable_fast_switch(struct cpufreq_policy
*policy
);
224 static inline unsigned int cpufreq_get(unsigned int cpu
)
228 static inline unsigned int cpufreq_quick_get(unsigned int cpu
)
232 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu
)
236 static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu
)
240 static inline void disable_cpufreq(void) { }
243 #ifdef CONFIG_CPU_FREQ_STAT
244 void cpufreq_stats_create_table(struct cpufreq_policy
*policy
);
245 void cpufreq_stats_free_table(struct cpufreq_policy
*policy
);
246 void cpufreq_stats_record_transition(struct cpufreq_policy
*policy
,
247 unsigned int new_freq
);
249 static inline void cpufreq_stats_create_table(struct cpufreq_policy
*policy
) { }
250 static inline void cpufreq_stats_free_table(struct cpufreq_policy
*policy
) { }
251 static inline void cpufreq_stats_record_transition(struct cpufreq_policy
*policy
,
252 unsigned int new_freq
) { }
253 #endif /* CONFIG_CPU_FREQ_STAT */
255 /*********************************************************************
256 * CPUFREQ DRIVER INTERFACE *
257 *********************************************************************/
259 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
260 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
261 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */
264 struct attribute attr
;
265 ssize_t (*show
)(struct cpufreq_policy
*, char *);
266 ssize_t (*store
)(struct cpufreq_policy
*, const char *, size_t count
);
269 #define cpufreq_freq_attr_ro(_name) \
270 static struct freq_attr _name = \
271 __ATTR(_name, 0444, show_##_name, NULL)
273 #define cpufreq_freq_attr_ro_perm(_name, _perm) \
274 static struct freq_attr _name = \
275 __ATTR(_name, _perm, show_##_name, NULL)
277 #define cpufreq_freq_attr_rw(_name) \
278 static struct freq_attr _name = \
279 __ATTR(_name, 0644, show_##_name, store_##_name)
281 #define cpufreq_freq_attr_wo(_name) \
282 static struct freq_attr _name = \
283 __ATTR(_name, 0200, NULL, store_##_name)
285 #define define_one_global_ro(_name) \
286 static struct kobj_attribute _name = \
287 __ATTR(_name, 0444, show_##_name, NULL)
289 #define define_one_global_rw(_name) \
290 static struct kobj_attribute _name = \
291 __ATTR(_name, 0644, show_##_name, store_##_name)
294 struct cpufreq_driver
{
295 char name
[CPUFREQ_NAME_LEN
];
299 /* needed by all drivers */
300 int (*init
)(struct cpufreq_policy
*policy
);
301 int (*verify
)(struct cpufreq_policy_data
*policy
);
303 /* define one out of two */
304 int (*setpolicy
)(struct cpufreq_policy
*policy
);
307 * On failure, should always restore frequency to policy->restore_freq
310 int (*target
)(struct cpufreq_policy
*policy
,
311 unsigned int target_freq
,
312 unsigned int relation
); /* Deprecated */
313 int (*target_index
)(struct cpufreq_policy
*policy
,
315 unsigned int (*fast_switch
)(struct cpufreq_policy
*policy
,
316 unsigned int target_freq
);
319 * Caches and returns the lowest driver-supported frequency greater than
320 * or equal to the target frequency, subject to any driver limitations.
321 * Does not set the frequency. Only to be implemented for drivers with
324 unsigned int (*resolve_freq
)(struct cpufreq_policy
*policy
,
325 unsigned int target_freq
);
328 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
331 * get_intermediate should return a stable intermediate frequency
332 * platform wants to switch to and target_intermediate() should set CPU
333 * to that frequency, before jumping to the frequency corresponding
334 * to 'index'. Core will take care of sending notifications and driver
335 * doesn't have to handle them in target_intermediate() or
338 * Drivers can return '0' from get_intermediate() in case they don't
339 * wish to switch to intermediate frequency for some target frequency.
340 * In that case core will directly call ->target_index().
342 unsigned int (*get_intermediate
)(struct cpufreq_policy
*policy
,
344 int (*target_intermediate
)(struct cpufreq_policy
*policy
,
347 /* should be defined, if possible */
348 unsigned int (*get
)(unsigned int cpu
);
350 /* Called to update policy limits on firmware notifications. */
351 void (*update_limits
)(unsigned int cpu
);
354 int (*bios_limit
)(int cpu
, unsigned int *limit
);
356 int (*online
)(struct cpufreq_policy
*policy
);
357 int (*offline
)(struct cpufreq_policy
*policy
);
358 int (*exit
)(struct cpufreq_policy
*policy
);
359 void (*stop_cpu
)(struct cpufreq_policy
*policy
);
360 int (*suspend
)(struct cpufreq_policy
*policy
);
361 int (*resume
)(struct cpufreq_policy
*policy
);
363 /* Will be called after the driver is fully initialized */
364 void (*ready
)(struct cpufreq_policy
*policy
);
366 struct freq_attr
**attr
;
368 /* platform specific boost support code */
370 int (*set_boost
)(struct cpufreq_policy
*policy
, int state
);
375 /* driver isn't removed even if all ->init() calls failed */
376 #define CPUFREQ_STICKY BIT(0)
378 /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
379 #define CPUFREQ_CONST_LOOPS BIT(1)
381 /* don't warn on suspend/resume speed mismatches */
382 #define CPUFREQ_PM_NO_WARN BIT(2)
385 * This should be set by platforms having multiple clock-domains, i.e.
386 * supporting multiple policies. With this sysfs directories of governor would
387 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
388 * governor with different tunables for different clusters.
390 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3)
393 * Driver will do POSTCHANGE notifications from outside of their ->target()
394 * routine and so must set cpufreq_driver->flags with this flag, so that core
395 * can handle them specially.
397 #define CPUFREQ_ASYNC_NOTIFICATION BIT(4)
400 * Set by drivers which want cpufreq core to check if CPU is running at a
401 * frequency present in freq-table exposed by the driver. For these drivers if
402 * CPU is found running at an out of table freq, we will try to set it to a freq
403 * from the table. And if that fails, we will stop further boot process by
404 * issuing a BUG_ON().
406 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
409 * Set by drivers to disallow use of governors with "dynamic_switching" flag
412 #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6)
415 * Set by drivers that want the core to automatically register the cpufreq
416 * driver as a thermal cooling device.
418 #define CPUFREQ_IS_COOLING_DEV BIT(7)
420 int cpufreq_register_driver(struct cpufreq_driver
*driver_data
);
421 int cpufreq_unregister_driver(struct cpufreq_driver
*driver_data
);
423 const char *cpufreq_get_current_driver(void);
424 void *cpufreq_get_driver_data(void);
426 static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver
*drv
)
428 return IS_ENABLED(CONFIG_CPU_THERMAL
) &&
429 (drv
->flags
& CPUFREQ_IS_COOLING_DEV
);
432 static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data
*policy
,
436 if (policy
->min
< min
)
438 if (policy
->max
< min
)
440 if (policy
->min
> max
)
442 if (policy
->max
> max
)
444 if (policy
->min
> policy
->max
)
445 policy
->min
= policy
->max
;
450 cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data
*policy
)
452 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
,
453 policy
->cpuinfo
.max_freq
);
456 #ifdef CONFIG_CPU_FREQ
457 void cpufreq_suspend(void);
458 void cpufreq_resume(void);
459 int cpufreq_generic_suspend(struct cpufreq_policy
*policy
);
461 static inline void cpufreq_suspend(void) {}
462 static inline void cpufreq_resume(void) {}
465 /*********************************************************************
466 * CPUFREQ NOTIFIER INTERFACE *
467 *********************************************************************/
469 #define CPUFREQ_TRANSITION_NOTIFIER (0)
470 #define CPUFREQ_POLICY_NOTIFIER (1)
472 /* Transition notifiers */
473 #define CPUFREQ_PRECHANGE (0)
474 #define CPUFREQ_POSTCHANGE (1)
476 /* Policy Notifiers */
477 #define CPUFREQ_CREATE_POLICY (0)
478 #define CPUFREQ_REMOVE_POLICY (1)
480 #ifdef CONFIG_CPU_FREQ
481 int cpufreq_register_notifier(struct notifier_block
*nb
, unsigned int list
);
482 int cpufreq_unregister_notifier(struct notifier_block
*nb
, unsigned int list
);
484 void cpufreq_freq_transition_begin(struct cpufreq_policy
*policy
,
485 struct cpufreq_freqs
*freqs
);
486 void cpufreq_freq_transition_end(struct cpufreq_policy
*policy
,
487 struct cpufreq_freqs
*freqs
, int transition_failed
);
489 #else /* CONFIG_CPU_FREQ */
490 static inline int cpufreq_register_notifier(struct notifier_block
*nb
,
495 static inline int cpufreq_unregister_notifier(struct notifier_block
*nb
,
500 #endif /* !CONFIG_CPU_FREQ */
503 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
510 * new = old * mult / div
512 static inline unsigned long cpufreq_scale(unsigned long old
, u_int div
,
515 #if BITS_PER_LONG == 32
516 u64 result
= ((u64
) old
) * ((u64
) mult
);
518 return (unsigned long) result
;
520 #elif BITS_PER_LONG == 64
521 unsigned long result
= old
* ((u64
) mult
);
527 /*********************************************************************
528 * CPUFREQ GOVERNORS *
529 *********************************************************************/
531 #define CPUFREQ_POLICY_UNKNOWN (0)
533 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
534 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
535 * two generic policies are available:
537 #define CPUFREQ_POLICY_POWERSAVE (1)
538 #define CPUFREQ_POLICY_PERFORMANCE (2)
541 * The polling frequency depends on the capability of the processor. Default
542 * polling frequency is 1000 times the transition latency of the processor. The
543 * ondemand governor will work on any processor with transition latency <= 10ms,
544 * using appropriate sampling rate.
546 #define LATENCY_MULTIPLIER (1000)
548 struct cpufreq_governor
{
549 char name
[CPUFREQ_NAME_LEN
];
550 int (*init
)(struct cpufreq_policy
*policy
);
551 void (*exit
)(struct cpufreq_policy
*policy
);
552 int (*start
)(struct cpufreq_policy
*policy
);
553 void (*stop
)(struct cpufreq_policy
*policy
);
554 void (*limits
)(struct cpufreq_policy
*policy
);
555 ssize_t (*show_setspeed
) (struct cpufreq_policy
*policy
,
557 int (*store_setspeed
) (struct cpufreq_policy
*policy
,
559 /* For governors which change frequency dynamically by themselves */
560 bool dynamic_switching
;
561 struct list_head governor_list
;
562 struct module
*owner
;
565 /* Pass a target to the cpufreq driver */
566 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy
*policy
,
567 unsigned int target_freq
);
568 int cpufreq_driver_target(struct cpufreq_policy
*policy
,
569 unsigned int target_freq
,
570 unsigned int relation
);
571 int __cpufreq_driver_target(struct cpufreq_policy
*policy
,
572 unsigned int target_freq
,
573 unsigned int relation
);
574 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy
*policy
,
575 unsigned int target_freq
);
576 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy
*policy
);
577 int cpufreq_register_governor(struct cpufreq_governor
*governor
);
578 void cpufreq_unregister_governor(struct cpufreq_governor
*governor
);
580 struct cpufreq_governor
*cpufreq_default_governor(void);
581 struct cpufreq_governor
*cpufreq_fallback_governor(void);
583 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy
*policy
)
585 if (policy
->max
< policy
->cur
)
586 __cpufreq_driver_target(policy
, policy
->max
, CPUFREQ_RELATION_H
);
587 else if (policy
->min
> policy
->cur
)
588 __cpufreq_driver_target(policy
, policy
->min
, CPUFREQ_RELATION_L
);
591 /* Governor attribute set */
592 struct gov_attr_set
{
594 struct list_head policy_list
;
595 struct mutex update_lock
;
599 /* sysfs ops for cpufreq governors */
600 extern const struct sysfs_ops governor_sysfs_ops
;
602 void gov_attr_set_init(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
603 void gov_attr_set_get(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
604 unsigned int gov_attr_set_put(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
606 /* Governor sysfs attribute */
607 struct governor_attr
{
608 struct attribute attr
;
609 ssize_t (*show
)(struct gov_attr_set
*attr_set
, char *buf
);
610 ssize_t (*store
)(struct gov_attr_set
*attr_set
, const char *buf
,
614 /*********************************************************************
615 * FREQUENCY TABLE HELPERS *
616 *********************************************************************/
618 /* Special Values of .frequency field */
619 #define CPUFREQ_ENTRY_INVALID ~0u
620 #define CPUFREQ_TABLE_END ~1u
621 /* Special Values of .flags field */
622 #define CPUFREQ_BOOST_FREQ (1 << 0)
624 struct cpufreq_frequency_table
{
626 unsigned int driver_data
; /* driver specific data, not used by core */
627 unsigned int frequency
; /* kHz - doesn't need to be in ascending
631 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
632 int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
633 struct cpufreq_frequency_table
**table
);
634 void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
635 struct cpufreq_frequency_table
**table
);
637 static inline int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
638 struct cpufreq_frequency_table
644 static inline void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
645 struct cpufreq_frequency_table
652 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
653 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
654 * @table: the cpufreq_frequency_table * to iterate over.
657 #define cpufreq_for_each_entry(pos, table) \
658 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
661 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
663 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
664 * @table: the cpufreq_frequency_table * to iterate over.
665 * @idx: the table entry currently being processed
668 #define cpufreq_for_each_entry_idx(pos, table, idx) \
669 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
673 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
674 * excluding CPUFREQ_ENTRY_INVALID frequencies.
675 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
676 * @table: the cpufreq_frequency_table * to iterate over.
679 #define cpufreq_for_each_valid_entry(pos, table) \
680 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
681 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
686 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
687 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
688 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
689 * @table: the cpufreq_frequency_table * to iterate over.
690 * @idx: the table entry currently being processed
693 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
694 cpufreq_for_each_entry_idx(pos, table, idx) \
695 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
700 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy
*policy
,
701 struct cpufreq_frequency_table
*table
);
703 int cpufreq_frequency_table_verify(struct cpufreq_policy_data
*policy
,
704 struct cpufreq_frequency_table
*table
);
705 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data
*policy
);
707 int cpufreq_table_index_unsorted(struct cpufreq_policy
*policy
,
708 unsigned int target_freq
,
709 unsigned int relation
);
710 int cpufreq_frequency_table_get_index(struct cpufreq_policy
*policy
,
713 ssize_t
cpufreq_show_cpus(const struct cpumask
*mask
, char *buf
);
715 #ifdef CONFIG_CPU_FREQ
716 int cpufreq_boost_trigger_state(int state
);
717 int cpufreq_boost_enabled(void);
718 int cpufreq_enable_boost_support(void);
719 bool policy_has_boost_freq(struct cpufreq_policy
*policy
);
721 /* Find lowest freq at or above target in a table in ascending order */
722 static inline int cpufreq_table_find_index_al(struct cpufreq_policy
*policy
,
723 unsigned int target_freq
)
725 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
726 struct cpufreq_frequency_table
*pos
;
730 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
731 freq
= pos
->frequency
;
733 if (freq
>= target_freq
)
742 /* Find lowest freq at or above target in a table in descending order */
743 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy
*policy
,
744 unsigned int target_freq
)
746 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
747 struct cpufreq_frequency_table
*pos
;
751 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
752 freq
= pos
->frequency
;
754 if (freq
== target_freq
)
757 if (freq
> target_freq
) {
762 /* No freq found above target_freq */
772 /* Works only on sorted freq-tables */
773 static inline int cpufreq_table_find_index_l(struct cpufreq_policy
*policy
,
774 unsigned int target_freq
)
776 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
778 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
779 return cpufreq_table_find_index_al(policy
, target_freq
);
781 return cpufreq_table_find_index_dl(policy
, target_freq
);
784 /* Find highest freq at or below target in a table in ascending order */
785 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy
*policy
,
786 unsigned int target_freq
)
788 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
789 struct cpufreq_frequency_table
*pos
;
793 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
794 freq
= pos
->frequency
;
796 if (freq
== target_freq
)
799 if (freq
< target_freq
) {
804 /* No freq found below target_freq */
814 /* Find highest freq at or below target in a table in descending order */
815 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy
*policy
,
816 unsigned int target_freq
)
818 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
819 struct cpufreq_frequency_table
*pos
;
823 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
824 freq
= pos
->frequency
;
826 if (freq
<= target_freq
)
835 /* Works only on sorted freq-tables */
836 static inline int cpufreq_table_find_index_h(struct cpufreq_policy
*policy
,
837 unsigned int target_freq
)
839 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
841 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
842 return cpufreq_table_find_index_ah(policy
, target_freq
);
844 return cpufreq_table_find_index_dh(policy
, target_freq
);
847 /* Find closest freq to target in a table in ascending order */
848 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy
*policy
,
849 unsigned int target_freq
)
851 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
852 struct cpufreq_frequency_table
*pos
;
856 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
857 freq
= pos
->frequency
;
859 if (freq
== target_freq
)
862 if (freq
< target_freq
) {
867 /* No freq found below target_freq */
871 /* Choose the closest freq */
872 if (target_freq
- table
[best
].frequency
> freq
- target_freq
)
881 /* Find closest freq to target in a table in descending order */
882 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy
*policy
,
883 unsigned int target_freq
)
885 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
886 struct cpufreq_frequency_table
*pos
;
890 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
891 freq
= pos
->frequency
;
893 if (freq
== target_freq
)
896 if (freq
> target_freq
) {
901 /* No freq found above target_freq */
905 /* Choose the closest freq */
906 if (table
[best
].frequency
- target_freq
> target_freq
- freq
)
915 /* Works only on sorted freq-tables */
916 static inline int cpufreq_table_find_index_c(struct cpufreq_policy
*policy
,
917 unsigned int target_freq
)
919 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
921 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
922 return cpufreq_table_find_index_ac(policy
, target_freq
);
924 return cpufreq_table_find_index_dc(policy
, target_freq
);
927 static inline int cpufreq_frequency_table_target(struct cpufreq_policy
*policy
,
928 unsigned int target_freq
,
929 unsigned int relation
)
931 if (unlikely(policy
->freq_table_sorted
== CPUFREQ_TABLE_UNSORTED
))
932 return cpufreq_table_index_unsorted(policy
, target_freq
,
936 case CPUFREQ_RELATION_L
:
937 return cpufreq_table_find_index_l(policy
, target_freq
);
938 case CPUFREQ_RELATION_H
:
939 return cpufreq_table_find_index_h(policy
, target_freq
);
940 case CPUFREQ_RELATION_C
:
941 return cpufreq_table_find_index_c(policy
, target_freq
);
943 pr_err("%s: Invalid relation: %d\n", __func__
, relation
);
948 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy
*policy
)
950 struct cpufreq_frequency_table
*pos
;
953 if (unlikely(!policy
->freq_table
))
956 cpufreq_for_each_valid_entry(pos
, policy
->freq_table
)
962 static inline int cpufreq_boost_trigger_state(int state
)
966 static inline int cpufreq_boost_enabled(void)
971 static inline int cpufreq_enable_boost_support(void)
976 static inline bool policy_has_boost_freq(struct cpufreq_policy
*policy
)
982 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
983 void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
984 struct cpufreq_governor
*old_gov
);
986 static inline void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
987 struct cpufreq_governor
*old_gov
) { }
990 extern void arch_freq_prepare_all(void);
991 extern unsigned int arch_freq_get_on_cpu(int cpu
);
993 extern void arch_set_freq_scale(struct cpumask
*cpus
, unsigned long cur_freq
,
994 unsigned long max_freq
);
996 /* the following are really really optional */
997 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs
;
998 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs
;
999 extern struct freq_attr
*cpufreq_generic_attr
[];
1000 int cpufreq_table_validate_and_sort(struct cpufreq_policy
*policy
);
1002 unsigned int cpufreq_generic_get(unsigned int cpu
);
1003 void cpufreq_generic_init(struct cpufreq_policy
*policy
,
1004 struct cpufreq_frequency_table
*table
,
1005 unsigned int transition_latency
);
1006 #endif /* _LINUX_CPUFREQ_H */