Commit | Line | Data |
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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 | 2 | /* |
bb176f7d | 3 | * linux/include/linux/cpufreq.h |
1da177e4 | 4 | * |
bb176f7d VK |
5 | * Copyright (C) 2001 Russell King |
6 | * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> | |
1da177e4 LT |
7 | */ |
8 | #ifndef _LINUX_CPUFREQ_H | |
9 | #define _LINUX_CPUFREQ_H | |
10 | ||
652ed95d | 11 | #include <linux/clk.h> |
5ff0a268 VK |
12 | #include <linux/cpumask.h> |
13 | #include <linux/completion.h> | |
1da177e4 | 14 | #include <linux/kobject.h> |
5ff0a268 | 15 | #include <linux/notifier.h> |
12478cf0 | 16 | #include <linux/spinlock.h> |
1da177e4 | 17 | #include <linux/sysfs.h> |
1da177e4 | 18 | |
1da177e4 | 19 | /********************************************************************* |
74aca95d | 20 | * CPUFREQ INTERFACE * |
1da177e4 | 21 | *********************************************************************/ |
74aca95d VK |
22 | /* |
23 | * Frequency values here are CPU kHz | |
24 | * | |
b53cc6ea | 25 | * Maximum transition latency is in nanoseconds - if it's unknown, |
1da177e4 LT |
26 | * CPUFREQ_ETERNAL shall be used. |
27 | */ | |
28 | ||
74aca95d VK |
29 | #define CPUFREQ_ETERNAL (-1) |
30 | #define CPUFREQ_NAME_LEN 16 | |
565ebe80 | 31 | /* Print length for names. Extra 1 space for accommodating '\n' in prints */ |
74aca95d VK |
32 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
33 | ||
1da177e4 LT |
34 | struct cpufreq_governor; |
35 | ||
da0c6dc0 VK |
36 | enum cpufreq_table_sorting { |
37 | CPUFREQ_TABLE_UNSORTED, | |
38 | CPUFREQ_TABLE_SORTED_ASCENDING, | |
39 | CPUFREQ_TABLE_SORTED_DESCENDING | |
40 | }; | |
41 | ||
1da177e4 LT |
42 | struct cpufreq_cpuinfo { |
43 | unsigned int max_freq; | |
44 | unsigned int min_freq; | |
335dc333 TF |
45 | |
46 | /* in 10^(-9) s = nanoseconds */ | |
47 | unsigned int transition_latency; | |
1da177e4 LT |
48 | }; |
49 | ||
1da177e4 | 50 | struct cpufreq_policy { |
951fc5f4 VK |
51 | /* CPUs sharing clock, require sw coordination */ |
52 | cpumask_var_t cpus; /* Online CPUs only */ | |
53 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
559ed407 | 54 | cpumask_var_t real_cpus; /* Related and present */ |
951fc5f4 | 55 | |
62b36cc1 | 56 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 57 | should set cpufreq */ |
9d16f207 | 58 | unsigned int cpu; /* cpu managing this policy, must be online */ |
9d16f207 | 59 | |
652ed95d | 60 | struct clk *clk; |
1da177e4 LT |
61 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
62 | ||
63 | unsigned int min; /* in kHz */ | |
64 | unsigned int max; /* in kHz */ | |
65 | unsigned int cur; /* in kHz, only needed if cpufreq | |
66 | * governors are used */ | |
1c03a2d0 | 67 | unsigned int restore_freq; /* = policy->cur before transition */ |
e28867ea VK |
68 | unsigned int suspend_freq; /* freq to set during suspend */ |
69 | ||
335dc333 | 70 | unsigned int policy; /* see above */ |
69030dd1 | 71 | unsigned int last_policy; /* policy before unplug */ |
1da177e4 | 72 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 73 | void *governor_data; |
4573237b | 74 | char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
1da177e4 | 75 | |
1da177e4 LT |
76 | struct work_struct update; /* if update_policy() needs to be |
77 | * called, but you're in IRQ context */ | |
78 | ||
18c49926 VK |
79 | struct dev_pm_qos_request *min_freq_req; |
80 | struct dev_pm_qos_request *max_freq_req; | |
e0b3165b | 81 | struct cpufreq_frequency_table *freq_table; |
da0c6dc0 | 82 | enum cpufreq_table_sorting freq_table_sorted; |
1da177e4 | 83 | |
c88a1f8b | 84 | struct list_head policy_list; |
1da177e4 LT |
85 | struct kobject kobj; |
86 | struct completion kobj_unregister; | |
ad7722da | 87 | |
88 | /* | |
89 | * The rules for this semaphore: | |
90 | * - Any routine that wants to read from the policy structure will | |
91 | * do a down_read on this semaphore. | |
92 | * - Any routine that will write to the policy structure and/or may take away | |
93 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
94 | * mode before doing so. | |
ad7722da | 95 | */ |
96 | struct rw_semaphore rwsem; | |
12478cf0 | 97 | |
b7898fda RW |
98 | /* |
99 | * Fast switch flags: | |
100 | * - fast_switch_possible should be set by the driver if it can | |
101 | * guarantee that frequency can be changed on any CPU sharing the | |
102 | * policy and that the change will affect all of the policy CPUs then. | |
103 | * - fast_switch_enabled is to be set by governors that support fast | |
565ebe80 | 104 | * frequency switching with the help of cpufreq_enable_fast_switch(). |
b7898fda RW |
105 | */ |
106 | bool fast_switch_possible; | |
107 | bool fast_switch_enabled; | |
108 | ||
1b72e7fd RW |
109 | /* |
110 | * Preferred average time interval between consecutive invocations of | |
111 | * the driver to set the frequency for this policy. To be set by the | |
112 | * scaling driver (0, which is the default, means no preference). | |
113 | */ | |
114 | unsigned int transition_delay_us; | |
115 | ||
99d14d0e VK |
116 | /* |
117 | * Remote DVFS flag (Not added to the driver structure as we don't want | |
118 | * to access another structure from scheduler hotpath). | |
119 | * | |
120 | * Should be set if CPUs can do DVFS on behalf of other CPUs from | |
121 | * different cpufreq policies. | |
122 | */ | |
123 | bool dvfs_possible_from_any_cpu; | |
124 | ||
e3c06236 SM |
125 | /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ |
126 | unsigned int cached_target_freq; | |
127 | int cached_resolved_idx; | |
128 | ||
12478cf0 SB |
129 | /* Synchronization for frequency transitions */ |
130 | bool transition_ongoing; /* Tracks transition status */ | |
131 | spinlock_t transition_lock; | |
132 | wait_queue_head_t transition_wait; | |
ca654dc3 | 133 | struct task_struct *transition_task; /* Task which is doing the transition */ |
413fffc3 | 134 | |
a9aaf291 VK |
135 | /* cpufreq-stats */ |
136 | struct cpufreq_stats *stats; | |
137 | ||
413fffc3 VK |
138 | /* For cpufreq driver's internal use */ |
139 | void *driver_data; | |
5c238a8b AK |
140 | |
141 | /* Pointer to the cooling device if used for thermal mitigation */ | |
142 | struct thermal_cooling_device *cdev; | |
67d874c3 VK |
143 | |
144 | struct notifier_block nb_min; | |
145 | struct notifier_block nb_max; | |
1da177e4 LT |
146 | }; |
147 | ||
df24014a VK |
148 | struct cpufreq_freqs { |
149 | struct cpufreq_policy *policy; | |
150 | unsigned int old; | |
151 | unsigned int new; | |
152 | u8 flags; /* flags of cpufreq_driver, see below. */ | |
153 | }; | |
154 | ||
62b36cc1 | 155 | /* Only for ACPI */ |
46f18e3a VP |
156 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
157 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
158 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
159 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 160 | |
c75b505d | 161 | #ifdef CONFIG_CPU_FREQ |
1f0bd44e | 162 | struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); |
74aca95d | 163 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 164 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d | 165 | #else |
1f0bd44e RW |
166 | static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) |
167 | { | |
168 | return NULL; | |
169 | } | |
c75b505d DV |
170 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
171 | { | |
172 | return NULL; | |
173 | } | |
174 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
175 | #endif | |
74aca95d | 176 | |
9083e498 RW |
177 | static inline bool policy_is_inactive(struct cpufreq_policy *policy) |
178 | { | |
179 | return cpumask_empty(policy->cpus); | |
180 | } | |
181 | ||
2624f90c FB |
182 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
183 | { | |
184 | return cpumask_weight(policy->cpus) > 1; | |
185 | } | |
186 | ||
74aca95d VK |
187 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
188 | extern struct kobject *cpufreq_global_kobject; | |
1da177e4 | 189 | |
74aca95d VK |
190 | #ifdef CONFIG_CPU_FREQ |
191 | unsigned int cpufreq_get(unsigned int cpu); | |
192 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
193 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
194 | void disable_cpufreq(void); | |
1da177e4 | 195 | |
74aca95d | 196 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
9083e498 RW |
197 | |
198 | struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu); | |
199 | void cpufreq_cpu_release(struct cpufreq_policy *policy); | |
74aca95d | 200 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
9083e498 RW |
201 | int cpufreq_set_policy(struct cpufreq_policy *policy, |
202 | struct cpufreq_policy *new_policy); | |
c57b25bd | 203 | void refresh_frequency_limits(struct cpufreq_policy *policy); |
30248fef | 204 | void cpufreq_update_policy(unsigned int cpu); |
5a25e3f7 | 205 | void cpufreq_update_limits(unsigned int cpu); |
74aca95d VK |
206 | bool have_governor_per_policy(void); |
207 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
b7898fda | 208 | void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); |
6c9d9c81 | 209 | void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); |
74aca95d VK |
210 | #else |
211 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 212 | { |
74aca95d VK |
213 | return 0; |
214 | } | |
215 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
216 | { | |
217 | return 0; | |
218 | } | |
219 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
220 | { | |
221 | return 0; | |
222 | } | |
223 | static inline void disable_cpufreq(void) { } | |
1da177e4 | 224 | #endif |
1da177e4 | 225 | |
1aefc75b RW |
226 | #ifdef CONFIG_CPU_FREQ_STAT |
227 | void cpufreq_stats_create_table(struct cpufreq_policy *policy); | |
228 | void cpufreq_stats_free_table(struct cpufreq_policy *policy); | |
229 | void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
230 | unsigned int new_freq); | |
231 | #else | |
232 | static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } | |
233 | static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } | |
234 | static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
235 | unsigned int new_freq) { } | |
236 | #endif /* CONFIG_CPU_FREQ_STAT */ | |
237 | ||
1da177e4 | 238 | /********************************************************************* |
74aca95d | 239 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
240 | *********************************************************************/ |
241 | ||
74aca95d VK |
242 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
243 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
5b0c0b16 | 244 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
1da177e4 | 245 | |
74aca95d VK |
246 | struct freq_attr { |
247 | struct attribute attr; | |
248 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
249 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
250 | }; |
251 | ||
74aca95d VK |
252 | #define cpufreq_freq_attr_ro(_name) \ |
253 | static struct freq_attr _name = \ | |
254 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 255 | |
74aca95d VK |
256 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
257 | static struct freq_attr _name = \ | |
258 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 259 | |
74aca95d VK |
260 | #define cpufreq_freq_attr_rw(_name) \ |
261 | static struct freq_attr _name = \ | |
262 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
263 | ||
ee7930ee MM |
264 | #define cpufreq_freq_attr_wo(_name) \ |
265 | static struct freq_attr _name = \ | |
266 | __ATTR(_name, 0200, NULL, store_##_name) | |
267 | ||
74aca95d | 268 | #define define_one_global_ro(_name) \ |
625c85a6 | 269 | static struct kobj_attribute _name = \ |
74aca95d VK |
270 | __ATTR(_name, 0444, show_##_name, NULL) |
271 | ||
272 | #define define_one_global_rw(_name) \ | |
625c85a6 | 273 | static struct kobj_attribute _name = \ |
74aca95d | 274 | __ATTR(_name, 0644, show_##_name, store_##_name) |
1da177e4 | 275 | |
1da177e4 LT |
276 | |
277 | struct cpufreq_driver { | |
90452e61 VK |
278 | char name[CPUFREQ_NAME_LEN]; |
279 | u8 flags; | |
280 | void *driver_data; | |
1da177e4 LT |
281 | |
282 | /* needed by all drivers */ | |
90452e61 VK |
283 | int (*init)(struct cpufreq_policy *policy); |
284 | int (*verify)(struct cpufreq_policy *policy); | |
1da177e4 LT |
285 | |
286 | /* define one out of two */ | |
90452e61 | 287 | int (*setpolicy)(struct cpufreq_policy *policy); |
1c03a2d0 VK |
288 | |
289 | /* | |
290 | * On failure, should always restore frequency to policy->restore_freq | |
291 | * (i.e. old freq). | |
292 | */ | |
90452e61 VK |
293 | int (*target)(struct cpufreq_policy *policy, |
294 | unsigned int target_freq, | |
295 | unsigned int relation); /* Deprecated */ | |
296 | int (*target_index)(struct cpufreq_policy *policy, | |
297 | unsigned int index); | |
b7898fda RW |
298 | unsigned int (*fast_switch)(struct cpufreq_policy *policy, |
299 | unsigned int target_freq); | |
e3c06236 SM |
300 | |
301 | /* | |
302 | * Caches and returns the lowest driver-supported frequency greater than | |
303 | * or equal to the target frequency, subject to any driver limitations. | |
304 | * Does not set the frequency. Only to be implemented for drivers with | |
305 | * target(). | |
306 | */ | |
307 | unsigned int (*resolve_freq)(struct cpufreq_policy *policy, | |
308 | unsigned int target_freq); | |
309 | ||
1c03a2d0 VK |
310 | /* |
311 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
312 | * unset. | |
313 | * | |
314 | * get_intermediate should return a stable intermediate frequency | |
315 | * platform wants to switch to and target_intermediate() should set CPU | |
316 | * to to that frequency, before jumping to the frequency corresponding | |
317 | * to 'index'. Core will take care of sending notifications and driver | |
318 | * doesn't have to handle them in target_intermediate() or | |
319 | * target_index(). | |
320 | * | |
321 | * Drivers can return '0' from get_intermediate() in case they don't | |
322 | * wish to switch to intermediate frequency for some target frequency. | |
323 | * In that case core will directly call ->target_index(). | |
324 | */ | |
90452e61 VK |
325 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
326 | unsigned int index); | |
327 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
328 | unsigned int index); | |
1da177e4 LT |
329 | |
330 | /* should be defined, if possible */ | |
90452e61 | 331 | unsigned int (*get)(unsigned int cpu); |
1da177e4 | 332 | |
5a25e3f7 RW |
333 | /* Called to update policy limits on firmware notifications. */ |
334 | void (*update_limits)(unsigned int cpu); | |
335 | ||
1da177e4 | 336 | /* optional */ |
90452e61 | 337 | int (*bios_limit)(int cpu, unsigned int *limit); |
bf0b90e3 | 338 | |
91a12e91 VK |
339 | int (*online)(struct cpufreq_policy *policy); |
340 | int (*offline)(struct cpufreq_policy *policy); | |
90452e61 VK |
341 | int (*exit)(struct cpufreq_policy *policy); |
342 | void (*stop_cpu)(struct cpufreq_policy *policy); | |
343 | int (*suspend)(struct cpufreq_policy *policy); | |
344 | int (*resume)(struct cpufreq_policy *policy); | |
7c45cf31 VK |
345 | |
346 | /* Will be called after the driver is fully initialized */ | |
347 | void (*ready)(struct cpufreq_policy *policy); | |
348 | ||
90452e61 | 349 | struct freq_attr **attr; |
6f19efc0 LM |
350 | |
351 | /* platform specific boost support code */ | |
90452e61 VK |
352 | bool boost_enabled; |
353 | int (*set_boost)(int state); | |
1da177e4 LT |
354 | }; |
355 | ||
356 | /* flags */ | |
8321be6a AK |
357 | |
358 | /* driver isn't removed even if all ->init() calls failed */ | |
359 | #define CPUFREQ_STICKY BIT(0) | |
360 | ||
361 | /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ | |
362 | #define CPUFREQ_CONST_LOOPS BIT(1) | |
363 | ||
364 | /* don't warn on suspend/resume speed mismatches */ | |
365 | #define CPUFREQ_PM_NO_WARN BIT(2) | |
1da177e4 | 366 | |
0b981e70 VK |
367 | /* |
368 | * This should be set by platforms having multiple clock-domains, i.e. | |
369 | * supporting multiple policies. With this sysfs directories of governor would | |
370 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
371 | * governor with different tunables for different clusters. | |
372 | */ | |
8321be6a | 373 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) |
0b981e70 | 374 | |
7dbf694d VK |
375 | /* |
376 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
377 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
378 | * can handle them specially. | |
379 | */ | |
8321be6a | 380 | #define CPUFREQ_ASYNC_NOTIFICATION BIT(4) |
7dbf694d | 381 | |
ae6b4271 VK |
382 | /* |
383 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
384 | * frequency present in freq-table exposed by the driver. For these drivers if | |
385 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
386 | * from the table. And if that fails, we will stop further boot process by | |
387 | * issuing a BUG_ON(). | |
388 | */ | |
8321be6a | 389 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) |
ae6b4271 | 390 | |
fe829ed8 VK |
391 | /* |
392 | * Set by drivers to disallow use of governors with "dynamic_switching" flag | |
393 | * set. | |
394 | */ | |
8321be6a | 395 | #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) |
fe829ed8 | 396 | |
5c238a8b AK |
397 | /* |
398 | * Set by drivers that want the core to automatically register the cpufreq | |
399 | * driver as a thermal cooling device. | |
400 | */ | |
401 | #define CPUFREQ_IS_COOLING_DEV BIT(7) | |
402 | ||
221dee28 LT |
403 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
404 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 405 | |
74aca95d | 406 | const char *cpufreq_get_current_driver(void); |
51315cdf | 407 | void *cpufreq_get_driver_data(void); |
1da177e4 | 408 | |
bcc61569 DL |
409 | static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv) |
410 | { | |
411 | return IS_ENABLED(CONFIG_CPU_THERMAL) && | |
412 | (drv->flags & CPUFREQ_IS_COOLING_DEV); | |
413 | } | |
414 | ||
bb176f7d VK |
415 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
416 | unsigned int min, unsigned int max) | |
1da177e4 LT |
417 | { |
418 | if (policy->min < min) | |
419 | policy->min = min; | |
420 | if (policy->max < min) | |
421 | policy->max = min; | |
422 | if (policy->min > max) | |
423 | policy->min = max; | |
424 | if (policy->max > max) | |
425 | policy->max = max; | |
426 | if (policy->min > policy->max) | |
427 | policy->min = policy->max; | |
428 | return; | |
429 | } | |
430 | ||
be49e346 VK |
431 | static inline void |
432 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
433 | { | |
434 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
435 | policy->cpuinfo.max_freq); | |
436 | } | |
437 | ||
2f0aea93 VK |
438 | #ifdef CONFIG_CPU_FREQ |
439 | void cpufreq_suspend(void); | |
440 | void cpufreq_resume(void); | |
e28867ea | 441 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
442 | #else |
443 | static inline void cpufreq_suspend(void) {} | |
444 | static inline void cpufreq_resume(void) {} | |
445 | #endif | |
446 | ||
74aca95d VK |
447 | /********************************************************************* |
448 | * CPUFREQ NOTIFIER INTERFACE * | |
449 | *********************************************************************/ | |
6dad2a29 | 450 | |
74aca95d VK |
451 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
452 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 453 | |
74aca95d VK |
454 | /* Transition notifiers */ |
455 | #define CPUFREQ_PRECHANGE (0) | |
456 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 457 | |
74aca95d | 458 | /* Policy Notifiers */ |
df0eea44 VK |
459 | #define CPUFREQ_CREATE_POLICY (0) |
460 | #define CPUFREQ_REMOVE_POLICY (1) | |
6dad2a29 | 461 | |
74aca95d VK |
462 | #ifdef CONFIG_CPU_FREQ |
463 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
464 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 465 | |
12478cf0 SB |
466 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
467 | struct cpufreq_freqs *freqs); | |
468 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
469 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 470 | |
74aca95d VK |
471 | #else /* CONFIG_CPU_FREQ */ |
472 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
473 | unsigned int list) | |
2eca40a8 RD |
474 | { |
475 | return 0; | |
476 | } | |
74aca95d VK |
477 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
478 | unsigned int list) | |
95235ca2 VP |
479 | { |
480 | return 0; | |
481 | } | |
74aca95d VK |
482 | #endif /* !CONFIG_CPU_FREQ */ |
483 | ||
484 | /** | |
485 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
486 | * safe) | |
487 | * @old: old value | |
488 | * @div: divisor | |
489 | * @mult: multiplier | |
490 | * | |
491 | * | |
492 | * new = old * mult / div | |
493 | */ | |
494 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
495 | u_int mult) | |
3d737108 | 496 | { |
74aca95d VK |
497 | #if BITS_PER_LONG == 32 |
498 | u64 result = ((u64) old) * ((u64) mult); | |
499 | do_div(result, div); | |
500 | return (unsigned long) result; | |
501 | ||
502 | #elif BITS_PER_LONG == 64 | |
503 | unsigned long result = old * ((u64) mult); | |
504 | result /= div; | |
505 | return result; | |
95235ca2 | 506 | #endif |
74aca95d | 507 | } |
95235ca2 | 508 | |
1da177e4 | 509 | /********************************************************************* |
74aca95d | 510 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
511 | *********************************************************************/ |
512 | ||
74aca95d VK |
513 | /* |
514 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
515 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
516 | * two generic policies are available: | |
517 | */ | |
518 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
519 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
520 | ||
379480d8 RW |
521 | /* |
522 | * The polling frequency depends on the capability of the processor. Default | |
523 | * polling frequency is 1000 times the transition latency of the processor. The | |
524 | * ondemand governor will work on any processor with transition latency <= 10ms, | |
525 | * using appropriate sampling rate. | |
379480d8 | 526 | */ |
379480d8 | 527 | #define LATENCY_MULTIPLIER (1000) |
379480d8 | 528 | |
74aca95d VK |
529 | struct cpufreq_governor { |
530 | char name[CPUFREQ_NAME_LEN]; | |
e788892b RW |
531 | int (*init)(struct cpufreq_policy *policy); |
532 | void (*exit)(struct cpufreq_policy *policy); | |
533 | int (*start)(struct cpufreq_policy *policy); | |
534 | void (*stop)(struct cpufreq_policy *policy); | |
535 | void (*limits)(struct cpufreq_policy *policy); | |
74aca95d VK |
536 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
537 | char *buf); | |
538 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
539 | unsigned int freq); | |
ed4676e2 VK |
540 | /* For governors which change frequency dynamically by themselves */ |
541 | bool dynamic_switching; | |
74aca95d VK |
542 | struct list_head governor_list; |
543 | struct module *owner; | |
544 | }; | |
545 | ||
546 | /* Pass a target to the cpufreq driver */ | |
b7898fda RW |
547 | unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, |
548 | unsigned int target_freq); | |
74aca95d VK |
549 | int cpufreq_driver_target(struct cpufreq_policy *policy, |
550 | unsigned int target_freq, | |
551 | unsigned int relation); | |
552 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
553 | unsigned int target_freq, | |
554 | unsigned int relation); | |
e3c06236 SM |
555 | unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, |
556 | unsigned int target_freq); | |
aa7519af | 557 | unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy); |
74aca95d VK |
558 | int cpufreq_register_governor(struct cpufreq_governor *governor); |
559 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
560 | ||
de1df26b RW |
561 | struct cpufreq_governor *cpufreq_default_governor(void); |
562 | struct cpufreq_governor *cpufreq_fallback_governor(void); | |
1da177e4 | 563 | |
bf2be2de VK |
564 | static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) |
565 | { | |
566 | if (policy->max < policy->cur) | |
567 | __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); | |
568 | else if (policy->min > policy->cur) | |
569 | __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); | |
570 | } | |
571 | ||
66893b6a RW |
572 | /* Governor attribute set */ |
573 | struct gov_attr_set { | |
574 | struct kobject kobj; | |
575 | struct list_head policy_list; | |
576 | struct mutex update_lock; | |
577 | int usage_count; | |
578 | }; | |
579 | ||
580 | /* sysfs ops for cpufreq governors */ | |
581 | extern const struct sysfs_ops governor_sysfs_ops; | |
582 | ||
583 | void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); | |
584 | void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); | |
585 | unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); | |
586 | ||
587 | /* Governor sysfs attribute */ | |
588 | struct governor_attr { | |
589 | struct attribute attr; | |
590 | ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); | |
591 | ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, | |
592 | size_t count); | |
593 | }; | |
594 | ||
03639978 | 595 | static inline bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy) |
674e7541 | 596 | { |
99d14d0e VK |
597 | /* |
598 | * Allow remote callbacks if: | |
599 | * - dvfs_possible_from_any_cpu flag is set | |
600 | * - the local and remote CPUs share cpufreq policy | |
601 | */ | |
d6344d4b RW |
602 | return policy->dvfs_possible_from_any_cpu || |
603 | cpumask_test_cpu(smp_processor_id(), policy->cpus); | |
674e7541 VK |
604 | } |
605 | ||
1da177e4 LT |
606 | /********************************************************************* |
607 | * FREQUENCY TABLE HELPERS * | |
608 | *********************************************************************/ | |
609 | ||
7f4b0461 | 610 | /* Special Values of .frequency field */ |
2b1987a9 BH |
611 | #define CPUFREQ_ENTRY_INVALID ~0u |
612 | #define CPUFREQ_TABLE_END ~1u | |
7f4b0461 VK |
613 | /* Special Values of .flags field */ |
614 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
1da177e4 LT |
615 | |
616 | struct cpufreq_frequency_table { | |
7f4b0461 | 617 | unsigned int flags; |
50701588 | 618 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
619 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
620 | * order */ | |
621 | }; | |
622 | ||
a0dd7b79 NM |
623 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
624 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
625 | struct cpufreq_frequency_table **table); | |
626 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
627 | struct cpufreq_frequency_table **table); | |
628 | #else | |
629 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
630 | struct cpufreq_frequency_table | |
631 | **table) | |
632 | { | |
633 | return -EINVAL; | |
634 | } | |
635 | ||
636 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
637 | struct cpufreq_frequency_table | |
638 | **table) | |
639 | { | |
640 | } | |
641 | #endif | |
642 | ||
27e289dc SK |
643 | /* |
644 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
645 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
646 | * @table: the cpufreq_frequency_table * to iterate over. | |
647 | */ | |
648 | ||
649 | #define cpufreq_for_each_entry(pos, table) \ | |
650 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
651 | ||
ffd81dcf DB |
652 | /* |
653 | * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table | |
654 | * with index | |
655 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
656 | * @table: the cpufreq_frequency_table * to iterate over. | |
657 | * @idx: the table entry currently being processed | |
658 | */ | |
659 | ||
660 | #define cpufreq_for_each_entry_idx(pos, table, idx) \ | |
661 | for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ | |
662 | pos++, idx++) | |
663 | ||
27e289dc SK |
664 | /* |
665 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
666 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
667 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
668 | * @table: the cpufreq_frequency_table * to iterate over. | |
669 | */ | |
670 | ||
34b08705 RW |
671 | #define cpufreq_for_each_valid_entry(pos, table) \ |
672 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ | |
673 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
674 | continue; \ | |
675 | else | |
27e289dc | 676 | |
ffd81dcf DB |
677 | /* |
678 | * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq | |
679 | * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies. | |
680 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
681 | * @table: the cpufreq_frequency_table * to iterate over. | |
682 | * @idx: the table entry currently being processed | |
683 | */ | |
684 | ||
685 | #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \ | |
686 | cpufreq_for_each_entry_idx(pos, table, idx) \ | |
687 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
688 | continue; \ | |
689 | else | |
690 | ||
691 | ||
1da177e4 LT |
692 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
693 | struct cpufreq_frequency_table *table); | |
694 | ||
695 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
696 | struct cpufreq_frequency_table *table); | |
18434512 | 697 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 | 698 | |
da0c6dc0 VK |
699 | int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, |
700 | unsigned int target_freq, | |
701 | unsigned int relation); | |
d3916691 VK |
702 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
703 | unsigned int freq); | |
1da177e4 | 704 | |
74aca95d VK |
705 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
706 | ||
6f19efc0 LM |
707 | #ifdef CONFIG_CPU_FREQ |
708 | int cpufreq_boost_trigger_state(int state); | |
6f19efc0 | 709 | int cpufreq_boost_enabled(void); |
44139ed4 VK |
710 | int cpufreq_enable_boost_support(void); |
711 | bool policy_has_boost_freq(struct cpufreq_policy *policy); | |
da0c6dc0 VK |
712 | |
713 | /* Find lowest freq at or above target in a table in ascending order */ | |
714 | static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, | |
715 | unsigned int target_freq) | |
716 | { | |
717 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 718 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 719 | unsigned int freq; |
ffd81dcf | 720 | int idx, best = -1; |
da0c6dc0 | 721 | |
ffd81dcf | 722 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 723 | freq = pos->frequency; |
da0c6dc0 VK |
724 | |
725 | if (freq >= target_freq) | |
ffd81dcf | 726 | return idx; |
da0c6dc0 | 727 | |
ffd81dcf | 728 | best = idx; |
da0c6dc0 VK |
729 | } |
730 | ||
ffd81dcf | 731 | return best; |
da0c6dc0 VK |
732 | } |
733 | ||
734 | /* Find lowest freq at or above target in a table in descending order */ | |
735 | static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, | |
736 | unsigned int target_freq) | |
737 | { | |
738 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 739 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 740 | unsigned int freq; |
ffd81dcf | 741 | int idx, best = -1; |
da0c6dc0 | 742 | |
ffd81dcf | 743 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 744 | freq = pos->frequency; |
da0c6dc0 VK |
745 | |
746 | if (freq == target_freq) | |
ffd81dcf | 747 | return idx; |
da0c6dc0 VK |
748 | |
749 | if (freq > target_freq) { | |
ffd81dcf | 750 | best = idx; |
da0c6dc0 VK |
751 | continue; |
752 | } | |
753 | ||
754 | /* No freq found above target_freq */ | |
ffd81dcf DB |
755 | if (best == -1) |
756 | return idx; | |
da0c6dc0 | 757 | |
ffd81dcf | 758 | return best; |
da0c6dc0 VK |
759 | } |
760 | ||
ffd81dcf | 761 | return best; |
da0c6dc0 VK |
762 | } |
763 | ||
764 | /* Works only on sorted freq-tables */ | |
765 | static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, | |
766 | unsigned int target_freq) | |
767 | { | |
768 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
769 | ||
770 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
771 | return cpufreq_table_find_index_al(policy, target_freq); | |
772 | else | |
773 | return cpufreq_table_find_index_dl(policy, target_freq); | |
774 | } | |
775 | ||
776 | /* Find highest freq at or below target in a table in ascending order */ | |
777 | static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, | |
778 | unsigned int target_freq) | |
779 | { | |
780 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 781 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 782 | unsigned int freq; |
ffd81dcf | 783 | int idx, best = -1; |
da0c6dc0 | 784 | |
ffd81dcf | 785 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 786 | freq = pos->frequency; |
da0c6dc0 VK |
787 | |
788 | if (freq == target_freq) | |
ffd81dcf | 789 | return idx; |
da0c6dc0 VK |
790 | |
791 | if (freq < target_freq) { | |
ffd81dcf | 792 | best = idx; |
da0c6dc0 VK |
793 | continue; |
794 | } | |
795 | ||
796 | /* No freq found below target_freq */ | |
ffd81dcf DB |
797 | if (best == -1) |
798 | return idx; | |
da0c6dc0 | 799 | |
ffd81dcf | 800 | return best; |
da0c6dc0 VK |
801 | } |
802 | ||
ffd81dcf | 803 | return best; |
da0c6dc0 VK |
804 | } |
805 | ||
806 | /* Find highest freq at or below target in a table in descending order */ | |
807 | static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, | |
808 | unsigned int target_freq) | |
809 | { | |
810 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 811 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 812 | unsigned int freq; |
ffd81dcf | 813 | int idx, best = -1; |
da0c6dc0 | 814 | |
ffd81dcf | 815 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 816 | freq = pos->frequency; |
da0c6dc0 VK |
817 | |
818 | if (freq <= target_freq) | |
ffd81dcf | 819 | return idx; |
da0c6dc0 | 820 | |
ffd81dcf | 821 | best = idx; |
da0c6dc0 VK |
822 | } |
823 | ||
ffd81dcf | 824 | return best; |
da0c6dc0 VK |
825 | } |
826 | ||
827 | /* Works only on sorted freq-tables */ | |
828 | static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, | |
829 | unsigned int target_freq) | |
830 | { | |
831 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
832 | ||
833 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
834 | return cpufreq_table_find_index_ah(policy, target_freq); | |
835 | else | |
836 | return cpufreq_table_find_index_dh(policy, target_freq); | |
837 | } | |
838 | ||
839 | /* Find closest freq to target in a table in ascending order */ | |
840 | static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, | |
841 | unsigned int target_freq) | |
842 | { | |
843 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 844 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 845 | unsigned int freq; |
ffd81dcf | 846 | int idx, best = -1; |
da0c6dc0 | 847 | |
ffd81dcf | 848 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 849 | freq = pos->frequency; |
da0c6dc0 VK |
850 | |
851 | if (freq == target_freq) | |
ffd81dcf | 852 | return idx; |
da0c6dc0 VK |
853 | |
854 | if (freq < target_freq) { | |
ffd81dcf | 855 | best = idx; |
da0c6dc0 VK |
856 | continue; |
857 | } | |
858 | ||
859 | /* No freq found below target_freq */ | |
ffd81dcf DB |
860 | if (best == -1) |
861 | return idx; | |
da0c6dc0 VK |
862 | |
863 | /* Choose the closest freq */ | |
ffd81dcf DB |
864 | if (target_freq - table[best].frequency > freq - target_freq) |
865 | return idx; | |
da0c6dc0 | 866 | |
ffd81dcf | 867 | return best; |
da0c6dc0 VK |
868 | } |
869 | ||
ffd81dcf | 870 | return best; |
da0c6dc0 VK |
871 | } |
872 | ||
873 | /* Find closest freq to target in a table in descending order */ | |
874 | static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, | |
875 | unsigned int target_freq) | |
876 | { | |
877 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 878 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 879 | unsigned int freq; |
ffd81dcf | 880 | int idx, best = -1; |
da0c6dc0 | 881 | |
ffd81dcf | 882 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 883 | freq = pos->frequency; |
da0c6dc0 VK |
884 | |
885 | if (freq == target_freq) | |
ffd81dcf | 886 | return idx; |
da0c6dc0 VK |
887 | |
888 | if (freq > target_freq) { | |
ffd81dcf | 889 | best = idx; |
da0c6dc0 VK |
890 | continue; |
891 | } | |
892 | ||
893 | /* No freq found above target_freq */ | |
ffd81dcf DB |
894 | if (best == -1) |
895 | return idx; | |
da0c6dc0 VK |
896 | |
897 | /* Choose the closest freq */ | |
ffd81dcf DB |
898 | if (table[best].frequency - target_freq > target_freq - freq) |
899 | return idx; | |
da0c6dc0 | 900 | |
ffd81dcf | 901 | return best; |
da0c6dc0 VK |
902 | } |
903 | ||
ffd81dcf | 904 | return best; |
da0c6dc0 VK |
905 | } |
906 | ||
907 | /* Works only on sorted freq-tables */ | |
908 | static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, | |
909 | unsigned int target_freq) | |
910 | { | |
911 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
912 | ||
913 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
914 | return cpufreq_table_find_index_ac(policy, target_freq); | |
915 | else | |
916 | return cpufreq_table_find_index_dc(policy, target_freq); | |
917 | } | |
918 | ||
919 | static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
920 | unsigned int target_freq, | |
921 | unsigned int relation) | |
922 | { | |
923 | if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) | |
924 | return cpufreq_table_index_unsorted(policy, target_freq, | |
925 | relation); | |
926 | ||
927 | switch (relation) { | |
928 | case CPUFREQ_RELATION_L: | |
929 | return cpufreq_table_find_index_l(policy, target_freq); | |
930 | case CPUFREQ_RELATION_H: | |
931 | return cpufreq_table_find_index_h(policy, target_freq); | |
932 | case CPUFREQ_RELATION_C: | |
933 | return cpufreq_table_find_index_c(policy, target_freq); | |
934 | default: | |
935 | pr_err("%s: Invalid relation: %d\n", __func__, relation); | |
936 | return -EINVAL; | |
937 | } | |
938 | } | |
55d85293 VK |
939 | |
940 | static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy) | |
941 | { | |
942 | struct cpufreq_frequency_table *pos; | |
943 | int count = 0; | |
944 | ||
945 | if (unlikely(!policy->freq_table)) | |
946 | return 0; | |
947 | ||
948 | cpufreq_for_each_valid_entry(pos, policy->freq_table) | |
949 | count++; | |
950 | ||
951 | return count; | |
952 | } | |
6f19efc0 LM |
953 | #else |
954 | static inline int cpufreq_boost_trigger_state(int state) | |
955 | { | |
956 | return 0; | |
957 | } | |
6f19efc0 LM |
958 | static inline int cpufreq_boost_enabled(void) |
959 | { | |
960 | return 0; | |
961 | } | |
44139ed4 VK |
962 | |
963 | static inline int cpufreq_enable_boost_support(void) | |
964 | { | |
965 | return -EINVAL; | |
966 | } | |
967 | ||
968 | static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) | |
969 | { | |
970 | return false; | |
971 | } | |
6f19efc0 | 972 | #endif |
1da177e4 | 973 | |
531b5c9f QP |
974 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
975 | void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
976 | struct cpufreq_governor *old_gov); | |
977 | #else | |
978 | static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
979 | struct cpufreq_governor *old_gov) { } | |
980 | #endif | |
981 | ||
7d5905dc | 982 | extern void arch_freq_prepare_all(void); |
f8475cef LB |
983 | extern unsigned int arch_freq_get_on_cpu(int cpu); |
984 | ||
e7d5459d DE |
985 | extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, |
986 | unsigned long max_freq); | |
987 | ||
1da177e4 LT |
988 | /* the following are really really optional */ |
989 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
21c36d35 | 990 | extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; |
18434512 | 991 | extern struct freq_attr *cpufreq_generic_attr[]; |
d417e069 | 992 | int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy); |
f4fd3797 | 993 | |
652ed95d | 994 | unsigned int cpufreq_generic_get(unsigned int cpu); |
c4dcc8a1 | 995 | void cpufreq_generic_init(struct cpufreq_policy *policy, |
70e9e778 VK |
996 | struct cpufreq_frequency_table *table, |
997 | unsigned int transition_latency); | |
1da177e4 | 998 | #endif /* _LINUX_CPUFREQ_H */ |