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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> |
3000ce3c | 16 | #include <linux/pm_qos.h> |
12478cf0 | 17 | #include <linux/spinlock.h> |
1da177e4 | 18 | #include <linux/sysfs.h> |
1da177e4 | 19 | |
1da177e4 | 20 | /********************************************************************* |
74aca95d | 21 | * CPUFREQ INTERFACE * |
1da177e4 | 22 | *********************************************************************/ |
74aca95d VK |
23 | /* |
24 | * Frequency values here are CPU kHz | |
25 | * | |
b53cc6ea | 26 | * Maximum transition latency is in nanoseconds - if it's unknown, |
1da177e4 LT |
27 | * CPUFREQ_ETERNAL shall be used. |
28 | */ | |
29 | ||
74aca95d VK |
30 | #define CPUFREQ_ETERNAL (-1) |
31 | #define CPUFREQ_NAME_LEN 16 | |
565ebe80 | 32 | /* Print length for names. Extra 1 space for accommodating '\n' in prints */ |
74aca95d VK |
33 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
34 | ||
1da177e4 LT |
35 | struct cpufreq_governor; |
36 | ||
da0c6dc0 VK |
37 | enum cpufreq_table_sorting { |
38 | CPUFREQ_TABLE_UNSORTED, | |
39 | CPUFREQ_TABLE_SORTED_ASCENDING, | |
40 | CPUFREQ_TABLE_SORTED_DESCENDING | |
41 | }; | |
42 | ||
1da177e4 LT |
43 | struct cpufreq_cpuinfo { |
44 | unsigned int max_freq; | |
45 | unsigned int min_freq; | |
335dc333 TF |
46 | |
47 | /* in 10^(-9) s = nanoseconds */ | |
48 | unsigned int transition_latency; | |
1da177e4 LT |
49 | }; |
50 | ||
1da177e4 | 51 | struct cpufreq_policy { |
951fc5f4 VK |
52 | /* CPUs sharing clock, require sw coordination */ |
53 | cpumask_var_t cpus; /* Online CPUs only */ | |
54 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
559ed407 | 55 | cpumask_var_t real_cpus; /* Related and present */ |
951fc5f4 | 56 | |
62b36cc1 | 57 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 58 | should set cpufreq */ |
9d16f207 | 59 | unsigned int cpu; /* cpu managing this policy, must be online */ |
9d16f207 | 60 | |
652ed95d | 61 | struct clk *clk; |
1da177e4 LT |
62 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
63 | ||
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 */ | |
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 | ||
3000ce3c RW |
79 | struct freq_constraints constraints; |
80 | struct freq_qos_request *min_freq_req; | |
81 | struct freq_qos_request *max_freq_req; | |
82 | ||
e0b3165b | 83 | struct cpufreq_frequency_table *freq_table; |
da0c6dc0 | 84 | enum cpufreq_table_sorting freq_table_sorted; |
1da177e4 | 85 | |
c88a1f8b | 86 | struct list_head policy_list; |
1da177e4 LT |
87 | struct kobject kobj; |
88 | struct completion kobj_unregister; | |
ad7722da VK |
89 | |
90 | /* | |
91 | * The rules for this semaphore: | |
92 | * - Any routine that wants to read from the policy structure will | |
93 | * do a down_read on this semaphore. | |
94 | * - Any routine that will write to the policy structure and/or may take away | |
95 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
96 | * mode before doing so. | |
ad7722da VK |
97 | */ |
98 | struct rw_semaphore rwsem; | |
12478cf0 | 99 | |
b7898fda RW |
100 | /* |
101 | * Fast switch flags: | |
102 | * - fast_switch_possible should be set by the driver if it can | |
103 | * guarantee that frequency can be changed on any CPU sharing the | |
104 | * policy and that the change will affect all of the policy CPUs then. | |
105 | * - fast_switch_enabled is to be set by governors that support fast | |
565ebe80 | 106 | * frequency switching with the help of cpufreq_enable_fast_switch(). |
b7898fda RW |
107 | */ |
108 | bool fast_switch_possible; | |
109 | bool fast_switch_enabled; | |
110 | ||
ea9364bb RW |
111 | /* |
112 | * Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current | |
113 | * governor. | |
114 | */ | |
115 | bool strict_target; | |
116 | ||
1b72e7fd RW |
117 | /* |
118 | * Preferred average time interval between consecutive invocations of | |
119 | * the driver to set the frequency for this policy. To be set by the | |
120 | * scaling driver (0, which is the default, means no preference). | |
121 | */ | |
122 | unsigned int transition_delay_us; | |
123 | ||
99d14d0e VK |
124 | /* |
125 | * Remote DVFS flag (Not added to the driver structure as we don't want | |
126 | * to access another structure from scheduler hotpath). | |
127 | * | |
128 | * Should be set if CPUs can do DVFS on behalf of other CPUs from | |
129 | * different cpufreq policies. | |
130 | */ | |
131 | bool dvfs_possible_from_any_cpu; | |
132 | ||
e3c06236 SM |
133 | /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ |
134 | unsigned int cached_target_freq; | |
292072c3 | 135 | unsigned int cached_resolved_idx; |
e3c06236 | 136 | |
12478cf0 SB |
137 | /* Synchronization for frequency transitions */ |
138 | bool transition_ongoing; /* Tracks transition status */ | |
139 | spinlock_t transition_lock; | |
140 | wait_queue_head_t transition_wait; | |
ca654dc3 | 141 | struct task_struct *transition_task; /* Task which is doing the transition */ |
413fffc3 | 142 | |
a9aaf291 VK |
143 | /* cpufreq-stats */ |
144 | struct cpufreq_stats *stats; | |
145 | ||
413fffc3 VK |
146 | /* For cpufreq driver's internal use */ |
147 | void *driver_data; | |
5c238a8b AK |
148 | |
149 | /* Pointer to the cooling device if used for thermal mitigation */ | |
150 | struct thermal_cooling_device *cdev; | |
67d874c3 VK |
151 | |
152 | struct notifier_block nb_min; | |
153 | struct notifier_block nb_max; | |
1da177e4 LT |
154 | }; |
155 | ||
1e4f63ae RW |
156 | /* |
157 | * Used for passing new cpufreq policy data to the cpufreq driver's ->verify() | |
158 | * callback for sanitization. That callback is only expected to modify the min | |
159 | * and max values, if necessary, and specifically it must not update the | |
160 | * frequency table. | |
161 | */ | |
162 | struct cpufreq_policy_data { | |
163 | struct cpufreq_cpuinfo cpuinfo; | |
164 | struct cpufreq_frequency_table *freq_table; | |
165 | unsigned int cpu; | |
166 | unsigned int min; /* in kHz */ | |
167 | unsigned int max; /* in kHz */ | |
168 | }; | |
169 | ||
df24014a VK |
170 | struct cpufreq_freqs { |
171 | struct cpufreq_policy *policy; | |
172 | unsigned int old; | |
173 | unsigned int new; | |
174 | u8 flags; /* flags of cpufreq_driver, see below. */ | |
175 | }; | |
176 | ||
62b36cc1 | 177 | /* Only for ACPI */ |
46f18e3a VP |
178 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
179 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
180 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
181 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 182 | |
c75b505d | 183 | #ifdef CONFIG_CPU_FREQ |
1f0bd44e | 184 | struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); |
74aca95d | 185 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 186 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d | 187 | #else |
1f0bd44e RW |
188 | static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) |
189 | { | |
190 | return NULL; | |
191 | } | |
c75b505d DV |
192 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
193 | { | |
194 | return NULL; | |
195 | } | |
196 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
197 | #endif | |
74aca95d | 198 | |
9083e498 RW |
199 | static inline bool policy_is_inactive(struct cpufreq_policy *policy) |
200 | { | |
201 | return cpumask_empty(policy->cpus); | |
202 | } | |
203 | ||
2624f90c FB |
204 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
205 | { | |
206 | return cpumask_weight(policy->cpus) > 1; | |
207 | } | |
208 | ||
74aca95d VK |
209 | #ifdef CONFIG_CPU_FREQ |
210 | unsigned int cpufreq_get(unsigned int cpu); | |
211 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
212 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
bbce8eaa | 213 | unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); |
74aca95d | 214 | void disable_cpufreq(void); |
1da177e4 | 215 | |
74aca95d | 216 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
9083e498 RW |
217 | |
218 | struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu); | |
219 | void cpufreq_cpu_release(struct cpufreq_policy *policy); | |
74aca95d | 220 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
c57b25bd | 221 | void refresh_frequency_limits(struct cpufreq_policy *policy); |
30248fef | 222 | void cpufreq_update_policy(unsigned int cpu); |
5a25e3f7 | 223 | void cpufreq_update_limits(unsigned int cpu); |
74aca95d | 224 | bool have_governor_per_policy(void); |
874f6353 | 225 | bool cpufreq_supports_freq_invariance(void); |
74aca95d | 226 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); |
b7898fda | 227 | void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); |
6c9d9c81 | 228 | void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); |
74aca95d VK |
229 | #else |
230 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 231 | { |
74aca95d VK |
232 | return 0; |
233 | } | |
234 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
239 | { | |
240 | return 0; | |
241 | } | |
bbce8eaa IV |
242 | static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) |
243 | { | |
244 | return 0; | |
245 | } | |
874f6353 IV |
246 | static inline bool cpufreq_supports_freq_invariance(void) |
247 | { | |
248 | return false; | |
249 | } | |
74aca95d | 250 | static inline void disable_cpufreq(void) { } |
1da177e4 | 251 | #endif |
1da177e4 | 252 | |
1aefc75b RW |
253 | #ifdef CONFIG_CPU_FREQ_STAT |
254 | void cpufreq_stats_create_table(struct cpufreq_policy *policy); | |
255 | void cpufreq_stats_free_table(struct cpufreq_policy *policy); | |
256 | void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
257 | unsigned int new_freq); | |
258 | #else | |
259 | static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } | |
260 | static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } | |
261 | static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
262 | unsigned int new_freq) { } | |
263 | #endif /* CONFIG_CPU_FREQ_STAT */ | |
264 | ||
1da177e4 | 265 | /********************************************************************* |
74aca95d | 266 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
267 | *********************************************************************/ |
268 | ||
74aca95d VK |
269 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
270 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
5b0c0b16 | 271 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
1da177e4 | 272 | |
74aca95d VK |
273 | struct freq_attr { |
274 | struct attribute attr; | |
275 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
276 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
277 | }; |
278 | ||
74aca95d VK |
279 | #define cpufreq_freq_attr_ro(_name) \ |
280 | static struct freq_attr _name = \ | |
281 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 282 | |
74aca95d VK |
283 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
284 | static struct freq_attr _name = \ | |
285 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 286 | |
74aca95d VK |
287 | #define cpufreq_freq_attr_rw(_name) \ |
288 | static struct freq_attr _name = \ | |
289 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
290 | ||
ee7930ee MM |
291 | #define cpufreq_freq_attr_wo(_name) \ |
292 | static struct freq_attr _name = \ | |
293 | __ATTR(_name, 0200, NULL, store_##_name) | |
294 | ||
74aca95d | 295 | #define define_one_global_ro(_name) \ |
625c85a6 | 296 | static struct kobj_attribute _name = \ |
74aca95d VK |
297 | __ATTR(_name, 0444, show_##_name, NULL) |
298 | ||
299 | #define define_one_global_rw(_name) \ | |
625c85a6 | 300 | static struct kobj_attribute _name = \ |
74aca95d | 301 | __ATTR(_name, 0644, show_##_name, store_##_name) |
1da177e4 | 302 | |
1da177e4 LT |
303 | |
304 | struct cpufreq_driver { | |
90452e61 | 305 | char name[CPUFREQ_NAME_LEN]; |
1c534352 | 306 | u16 flags; |
90452e61 | 307 | void *driver_data; |
1da177e4 LT |
308 | |
309 | /* needed by all drivers */ | |
90452e61 | 310 | int (*init)(struct cpufreq_policy *policy); |
1e4f63ae | 311 | int (*verify)(struct cpufreq_policy_data *policy); |
1da177e4 LT |
312 | |
313 | /* define one out of two */ | |
90452e61 | 314 | int (*setpolicy)(struct cpufreq_policy *policy); |
1c03a2d0 | 315 | |
90452e61 VK |
316 | int (*target)(struct cpufreq_policy *policy, |
317 | unsigned int target_freq, | |
318 | unsigned int relation); /* Deprecated */ | |
319 | int (*target_index)(struct cpufreq_policy *policy, | |
320 | unsigned int index); | |
b7898fda RW |
321 | unsigned int (*fast_switch)(struct cpufreq_policy *policy, |
322 | unsigned int target_freq); | |
ee2cc427 RW |
323 | /* |
324 | * ->fast_switch() replacement for drivers that use an internal | |
325 | * representation of performance levels and can pass hints other than | |
326 | * the target performance level to the hardware. | |
327 | */ | |
328 | void (*adjust_perf)(unsigned int cpu, | |
329 | unsigned long min_perf, | |
330 | unsigned long target_perf, | |
331 | unsigned long capacity); | |
e3c06236 SM |
332 | |
333 | /* | |
334 | * Caches and returns the lowest driver-supported frequency greater than | |
335 | * or equal to the target frequency, subject to any driver limitations. | |
336 | * Does not set the frequency. Only to be implemented for drivers with | |
337 | * target(). | |
338 | */ | |
339 | unsigned int (*resolve_freq)(struct cpufreq_policy *policy, | |
340 | unsigned int target_freq); | |
341 | ||
1c03a2d0 VK |
342 | /* |
343 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
344 | * unset. | |
345 | * | |
346 | * get_intermediate should return a stable intermediate frequency | |
347 | * platform wants to switch to and target_intermediate() should set CPU | |
2909438d | 348 | * to that frequency, before jumping to the frequency corresponding |
1c03a2d0 VK |
349 | * to 'index'. Core will take care of sending notifications and driver |
350 | * doesn't have to handle them in target_intermediate() or | |
351 | * target_index(). | |
352 | * | |
353 | * Drivers can return '0' from get_intermediate() in case they don't | |
354 | * wish to switch to intermediate frequency for some target frequency. | |
355 | * In that case core will directly call ->target_index(). | |
356 | */ | |
90452e61 VK |
357 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
358 | unsigned int index); | |
359 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
360 | unsigned int index); | |
1da177e4 LT |
361 | |
362 | /* should be defined, if possible */ | |
90452e61 | 363 | unsigned int (*get)(unsigned int cpu); |
1da177e4 | 364 | |
5a25e3f7 RW |
365 | /* Called to update policy limits on firmware notifications. */ |
366 | void (*update_limits)(unsigned int cpu); | |
367 | ||
1da177e4 | 368 | /* optional */ |
90452e61 | 369 | int (*bios_limit)(int cpu, unsigned int *limit); |
bf0b90e3 | 370 | |
91a12e91 VK |
371 | int (*online)(struct cpufreq_policy *policy); |
372 | int (*offline)(struct cpufreq_policy *policy); | |
90452e61 VK |
373 | int (*exit)(struct cpufreq_policy *policy); |
374 | void (*stop_cpu)(struct cpufreq_policy *policy); | |
375 | int (*suspend)(struct cpufreq_policy *policy); | |
376 | int (*resume)(struct cpufreq_policy *policy); | |
7c45cf31 VK |
377 | |
378 | /* Will be called after the driver is fully initialized */ | |
379 | void (*ready)(struct cpufreq_policy *policy); | |
380 | ||
90452e61 | 381 | struct freq_attr **attr; |
6f19efc0 LM |
382 | |
383 | /* platform specific boost support code */ | |
90452e61 | 384 | bool boost_enabled; |
cf6fada7 | 385 | int (*set_boost)(struct cpufreq_policy *policy, int state); |
1da177e4 LT |
386 | }; |
387 | ||
388 | /* flags */ | |
8321be6a | 389 | |
5ae4a4b4 VK |
390 | /* |
391 | * Set by drivers that need to update internale upper and lower boundaries along | |
392 | * with the target frequency and so the core and governors should also invoke | |
393 | * the diver if the target frequency does not change, but the policy min or max | |
394 | * may have changed. | |
395 | */ | |
396 | #define CPUFREQ_NEED_UPDATE_LIMITS BIT(0) | |
8321be6a AK |
397 | |
398 | /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ | |
399 | #define CPUFREQ_CONST_LOOPS BIT(1) | |
400 | ||
2f053186 VK |
401 | /* |
402 | * Set by drivers that want the core to automatically register the cpufreq | |
403 | * driver as a thermal cooling device. | |
404 | */ | |
405 | #define CPUFREQ_IS_COOLING_DEV BIT(2) | |
1da177e4 | 406 | |
0b981e70 VK |
407 | /* |
408 | * This should be set by platforms having multiple clock-domains, i.e. | |
409 | * supporting multiple policies. With this sysfs directories of governor would | |
410 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
411 | * governor with different tunables for different clusters. | |
412 | */ | |
8321be6a | 413 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) |
0b981e70 | 414 | |
7dbf694d VK |
415 | /* |
416 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
417 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
418 | * can handle them specially. | |
419 | */ | |
8321be6a | 420 | #define CPUFREQ_ASYNC_NOTIFICATION BIT(4) |
7dbf694d | 421 | |
ae6b4271 VK |
422 | /* |
423 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
424 | * frequency present in freq-table exposed by the driver. For these drivers if | |
425 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
426 | * from the table. And if that fails, we will stop further boot process by | |
427 | * issuing a BUG_ON(). | |
428 | */ | |
8321be6a | 429 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) |
ae6b4271 | 430 | |
fe829ed8 VK |
431 | /* |
432 | * Set by drivers to disallow use of governors with "dynamic_switching" flag | |
433 | * set. | |
434 | */ | |
8321be6a | 435 | #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) |
fe829ed8 | 436 | |
221dee28 LT |
437 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
438 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 439 | |
a62f68f5 | 440 | bool cpufreq_driver_test_flags(u16 flags); |
74aca95d | 441 | const char *cpufreq_get_current_driver(void); |
51315cdf | 442 | void *cpufreq_get_driver_data(void); |
1da177e4 | 443 | |
bcc61569 DL |
444 | static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv) |
445 | { | |
446 | return IS_ENABLED(CONFIG_CPU_THERMAL) && | |
447 | (drv->flags & CPUFREQ_IS_COOLING_DEV); | |
448 | } | |
449 | ||
1e4f63ae RW |
450 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy, |
451 | unsigned int min, | |
452 | unsigned int max) | |
1da177e4 LT |
453 | { |
454 | if (policy->min < min) | |
455 | policy->min = min; | |
456 | if (policy->max < min) | |
457 | policy->max = min; | |
458 | if (policy->min > max) | |
459 | policy->min = max; | |
460 | if (policy->max > max) | |
461 | policy->max = max; | |
462 | if (policy->min > policy->max) | |
463 | policy->min = policy->max; | |
464 | return; | |
465 | } | |
466 | ||
be49e346 | 467 | static inline void |
1e4f63ae | 468 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy) |
be49e346 VK |
469 | { |
470 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
1e4f63ae | 471 | policy->cpuinfo.max_freq); |
be49e346 VK |
472 | } |
473 | ||
2f0aea93 VK |
474 | #ifdef CONFIG_CPU_FREQ |
475 | void cpufreq_suspend(void); | |
476 | void cpufreq_resume(void); | |
e28867ea | 477 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
478 | #else |
479 | static inline void cpufreq_suspend(void) {} | |
480 | static inline void cpufreq_resume(void) {} | |
481 | #endif | |
482 | ||
74aca95d VK |
483 | /********************************************************************* |
484 | * CPUFREQ NOTIFIER INTERFACE * | |
485 | *********************************************************************/ | |
6dad2a29 | 486 | |
74aca95d VK |
487 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
488 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 489 | |
74aca95d VK |
490 | /* Transition notifiers */ |
491 | #define CPUFREQ_PRECHANGE (0) | |
492 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 493 | |
74aca95d | 494 | /* Policy Notifiers */ |
df0eea44 VK |
495 | #define CPUFREQ_CREATE_POLICY (0) |
496 | #define CPUFREQ_REMOVE_POLICY (1) | |
6dad2a29 | 497 | |
74aca95d VK |
498 | #ifdef CONFIG_CPU_FREQ |
499 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
500 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 501 | |
12478cf0 SB |
502 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
503 | struct cpufreq_freqs *freqs); | |
504 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
505 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 506 | |
74aca95d VK |
507 | #else /* CONFIG_CPU_FREQ */ |
508 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
509 | unsigned int list) | |
2eca40a8 RD |
510 | { |
511 | return 0; | |
512 | } | |
74aca95d VK |
513 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
514 | unsigned int list) | |
95235ca2 VP |
515 | { |
516 | return 0; | |
517 | } | |
74aca95d VK |
518 | #endif /* !CONFIG_CPU_FREQ */ |
519 | ||
520 | /** | |
521 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
522 | * safe) | |
523 | * @old: old value | |
524 | * @div: divisor | |
525 | * @mult: multiplier | |
526 | * | |
527 | * | |
528 | * new = old * mult / div | |
529 | */ | |
530 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
531 | u_int mult) | |
3d737108 | 532 | { |
74aca95d VK |
533 | #if BITS_PER_LONG == 32 |
534 | u64 result = ((u64) old) * ((u64) mult); | |
535 | do_div(result, div); | |
536 | return (unsigned long) result; | |
537 | ||
538 | #elif BITS_PER_LONG == 64 | |
539 | unsigned long result = old * ((u64) mult); | |
540 | result /= div; | |
541 | return result; | |
95235ca2 | 542 | #endif |
74aca95d | 543 | } |
95235ca2 | 544 | |
1da177e4 | 545 | /********************************************************************* |
74aca95d | 546 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
547 | *********************************************************************/ |
548 | ||
1e4f63ae | 549 | #define CPUFREQ_POLICY_UNKNOWN (0) |
74aca95d VK |
550 | /* |
551 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
552 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
553 | * two generic policies are available: | |
554 | */ | |
555 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
556 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
557 | ||
379480d8 RW |
558 | /* |
559 | * The polling frequency depends on the capability of the processor. Default | |
560 | * polling frequency is 1000 times the transition latency of the processor. The | |
561 | * ondemand governor will work on any processor with transition latency <= 10ms, | |
562 | * using appropriate sampling rate. | |
379480d8 | 563 | */ |
379480d8 | 564 | #define LATENCY_MULTIPLIER (1000) |
379480d8 | 565 | |
74aca95d VK |
566 | struct cpufreq_governor { |
567 | char name[CPUFREQ_NAME_LEN]; | |
e788892b RW |
568 | int (*init)(struct cpufreq_policy *policy); |
569 | void (*exit)(struct cpufreq_policy *policy); | |
570 | int (*start)(struct cpufreq_policy *policy); | |
571 | void (*stop)(struct cpufreq_policy *policy); | |
572 | void (*limits)(struct cpufreq_policy *policy); | |
74aca95d VK |
573 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
574 | char *buf); | |
575 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
576 | unsigned int freq); | |
74aca95d VK |
577 | struct list_head governor_list; |
578 | struct module *owner; | |
9a2a9ebc | 579 | u8 flags; |
74aca95d VK |
580 | }; |
581 | ||
9a2a9ebc RW |
582 | /* Governor flags */ |
583 | ||
584 | /* For governors which change frequency dynamically by themselves */ | |
585 | #define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0) | |
586 | ||
218f6687 RW |
587 | /* For governors wanting the target frequency to be set exactly */ |
588 | #define CPUFREQ_GOV_STRICT_TARGET BIT(1) | |
589 | ||
9a2a9ebc | 590 | |
74aca95d | 591 | /* Pass a target to the cpufreq driver */ |
b7898fda RW |
592 | unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, |
593 | unsigned int target_freq); | |
ee2cc427 RW |
594 | void cpufreq_driver_adjust_perf(unsigned int cpu, |
595 | unsigned long min_perf, | |
596 | unsigned long target_perf, | |
597 | unsigned long capacity); | |
598 | bool cpufreq_driver_has_adjust_perf(void); | |
74aca95d VK |
599 | int cpufreq_driver_target(struct cpufreq_policy *policy, |
600 | unsigned int target_freq, | |
601 | unsigned int relation); | |
602 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
603 | unsigned int target_freq, | |
604 | unsigned int relation); | |
e3c06236 SM |
605 | unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, |
606 | unsigned int target_freq); | |
aa7519af | 607 | unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy); |
74aca95d VK |
608 | int cpufreq_register_governor(struct cpufreq_governor *governor); |
609 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
f6ebbcf0 RW |
610 | int cpufreq_start_governor(struct cpufreq_policy *policy); |
611 | void cpufreq_stop_governor(struct cpufreq_policy *policy); | |
74aca95d | 612 | |
10dd8573 QP |
613 | #define cpufreq_governor_init(__governor) \ |
614 | static int __init __governor##_init(void) \ | |
615 | { \ | |
616 | return cpufreq_register_governor(&__governor); \ | |
617 | } \ | |
618 | core_initcall(__governor##_init) | |
619 | ||
620 | #define cpufreq_governor_exit(__governor) \ | |
621 | static void __exit __governor##_exit(void) \ | |
622 | { \ | |
623 | return cpufreq_unregister_governor(&__governor); \ | |
624 | } \ | |
625 | module_exit(__governor##_exit) | |
626 | ||
de1df26b RW |
627 | struct cpufreq_governor *cpufreq_default_governor(void); |
628 | struct cpufreq_governor *cpufreq_fallback_governor(void); | |
1da177e4 | 629 | |
bf2be2de VK |
630 | static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) |
631 | { | |
632 | if (policy->max < policy->cur) | |
633 | __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); | |
634 | else if (policy->min > policy->cur) | |
635 | __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); | |
636 | } | |
637 | ||
66893b6a RW |
638 | /* Governor attribute set */ |
639 | struct gov_attr_set { | |
640 | struct kobject kobj; | |
641 | struct list_head policy_list; | |
642 | struct mutex update_lock; | |
643 | int usage_count; | |
644 | }; | |
645 | ||
646 | /* sysfs ops for cpufreq governors */ | |
647 | extern const struct sysfs_ops governor_sysfs_ops; | |
648 | ||
649 | void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); | |
650 | void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); | |
651 | unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); | |
652 | ||
653 | /* Governor sysfs attribute */ | |
654 | struct governor_attr { | |
655 | struct attribute attr; | |
656 | ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); | |
657 | ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, | |
658 | size_t count); | |
659 | }; | |
660 | ||
1da177e4 LT |
661 | /********************************************************************* |
662 | * FREQUENCY TABLE HELPERS * | |
663 | *********************************************************************/ | |
664 | ||
7f4b0461 | 665 | /* Special Values of .frequency field */ |
2b1987a9 BH |
666 | #define CPUFREQ_ENTRY_INVALID ~0u |
667 | #define CPUFREQ_TABLE_END ~1u | |
7f4b0461 VK |
668 | /* Special Values of .flags field */ |
669 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
1da177e4 LT |
670 | |
671 | struct cpufreq_frequency_table { | |
7f4b0461 | 672 | unsigned int flags; |
50701588 | 673 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
674 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
675 | * order */ | |
676 | }; | |
677 | ||
a0dd7b79 NM |
678 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
679 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
680 | struct cpufreq_frequency_table **table); | |
681 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
682 | struct cpufreq_frequency_table **table); | |
683 | #else | |
684 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
685 | struct cpufreq_frequency_table | |
686 | **table) | |
687 | { | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
692 | struct cpufreq_frequency_table | |
693 | **table) | |
694 | { | |
695 | } | |
696 | #endif | |
697 | ||
27e289dc SK |
698 | /* |
699 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
700 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
701 | * @table: the cpufreq_frequency_table * to iterate over. | |
702 | */ | |
703 | ||
704 | #define cpufreq_for_each_entry(pos, table) \ | |
705 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
706 | ||
ffd81dcf DB |
707 | /* |
708 | * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table | |
709 | * with index | |
710 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
711 | * @table: the cpufreq_frequency_table * to iterate over. | |
712 | * @idx: the table entry currently being processed | |
713 | */ | |
714 | ||
715 | #define cpufreq_for_each_entry_idx(pos, table, idx) \ | |
716 | for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ | |
717 | pos++, idx++) | |
718 | ||
27e289dc SK |
719 | /* |
720 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
721 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
722 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
723 | * @table: the cpufreq_frequency_table * to iterate over. | |
724 | */ | |
725 | ||
34b08705 RW |
726 | #define cpufreq_for_each_valid_entry(pos, table) \ |
727 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ | |
728 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
729 | continue; \ | |
730 | else | |
27e289dc | 731 | |
ffd81dcf DB |
732 | /* |
733 | * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq | |
734 | * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies. | |
735 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
736 | * @table: the cpufreq_frequency_table * to iterate over. | |
737 | * @idx: the table entry currently being processed | |
738 | */ | |
739 | ||
740 | #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \ | |
741 | cpufreq_for_each_entry_idx(pos, table, idx) \ | |
742 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
743 | continue; \ | |
744 | else | |
745 | ||
746 | ||
1da177e4 LT |
747 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
748 | struct cpufreq_frequency_table *table); | |
749 | ||
1e4f63ae | 750 | int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy, |
1da177e4 | 751 | struct cpufreq_frequency_table *table); |
1e4f63ae | 752 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy); |
1da177e4 | 753 | |
da0c6dc0 VK |
754 | int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, |
755 | unsigned int target_freq, | |
756 | unsigned int relation); | |
d3916691 VK |
757 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
758 | unsigned int freq); | |
1da177e4 | 759 | |
74aca95d VK |
760 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
761 | ||
6f19efc0 LM |
762 | #ifdef CONFIG_CPU_FREQ |
763 | int cpufreq_boost_trigger_state(int state); | |
6f19efc0 | 764 | int cpufreq_boost_enabled(void); |
44139ed4 VK |
765 | int cpufreq_enable_boost_support(void); |
766 | bool policy_has_boost_freq(struct cpufreq_policy *policy); | |
da0c6dc0 VK |
767 | |
768 | /* Find lowest freq at or above target in a table in ascending order */ | |
769 | static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, | |
770 | unsigned int target_freq) | |
771 | { | |
772 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 773 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 774 | unsigned int freq; |
ffd81dcf | 775 | int idx, best = -1; |
da0c6dc0 | 776 | |
ffd81dcf | 777 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 778 | freq = pos->frequency; |
da0c6dc0 VK |
779 | |
780 | if (freq >= target_freq) | |
ffd81dcf | 781 | return idx; |
da0c6dc0 | 782 | |
ffd81dcf | 783 | best = idx; |
da0c6dc0 VK |
784 | } |
785 | ||
ffd81dcf | 786 | return best; |
da0c6dc0 VK |
787 | } |
788 | ||
789 | /* Find lowest freq at or above target in a table in descending order */ | |
790 | static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, | |
791 | unsigned int target_freq) | |
792 | { | |
793 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 794 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 795 | unsigned int freq; |
ffd81dcf | 796 | int idx, best = -1; |
da0c6dc0 | 797 | |
ffd81dcf | 798 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 799 | freq = pos->frequency; |
da0c6dc0 VK |
800 | |
801 | if (freq == target_freq) | |
ffd81dcf | 802 | return idx; |
da0c6dc0 VK |
803 | |
804 | if (freq > target_freq) { | |
ffd81dcf | 805 | best = idx; |
da0c6dc0 VK |
806 | continue; |
807 | } | |
808 | ||
809 | /* No freq found above target_freq */ | |
ffd81dcf DB |
810 | if (best == -1) |
811 | return idx; | |
da0c6dc0 | 812 | |
ffd81dcf | 813 | return best; |
da0c6dc0 VK |
814 | } |
815 | ||
ffd81dcf | 816 | return best; |
da0c6dc0 VK |
817 | } |
818 | ||
819 | /* Works only on sorted freq-tables */ | |
820 | static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, | |
821 | unsigned int target_freq) | |
822 | { | |
823 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
824 | ||
825 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
826 | return cpufreq_table_find_index_al(policy, target_freq); | |
827 | else | |
828 | return cpufreq_table_find_index_dl(policy, target_freq); | |
829 | } | |
830 | ||
831 | /* Find highest freq at or below target in a table in ascending order */ | |
832 | static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, | |
833 | unsigned int target_freq) | |
834 | { | |
835 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 836 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 837 | unsigned int freq; |
ffd81dcf | 838 | int idx, best = -1; |
da0c6dc0 | 839 | |
ffd81dcf | 840 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 841 | freq = pos->frequency; |
da0c6dc0 VK |
842 | |
843 | if (freq == target_freq) | |
ffd81dcf | 844 | return idx; |
da0c6dc0 VK |
845 | |
846 | if (freq < target_freq) { | |
ffd81dcf | 847 | best = idx; |
da0c6dc0 VK |
848 | continue; |
849 | } | |
850 | ||
851 | /* No freq found below target_freq */ | |
ffd81dcf DB |
852 | if (best == -1) |
853 | return idx; | |
da0c6dc0 | 854 | |
ffd81dcf | 855 | return best; |
da0c6dc0 VK |
856 | } |
857 | ||
ffd81dcf | 858 | return best; |
da0c6dc0 VK |
859 | } |
860 | ||
861 | /* Find highest freq at or below target in a table in descending order */ | |
862 | static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, | |
863 | unsigned int target_freq) | |
864 | { | |
865 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 866 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 867 | unsigned int freq; |
ffd81dcf | 868 | int idx, best = -1; |
da0c6dc0 | 869 | |
ffd81dcf | 870 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 871 | freq = pos->frequency; |
da0c6dc0 VK |
872 | |
873 | if (freq <= target_freq) | |
ffd81dcf | 874 | return idx; |
da0c6dc0 | 875 | |
ffd81dcf | 876 | best = idx; |
da0c6dc0 VK |
877 | } |
878 | ||
ffd81dcf | 879 | return best; |
da0c6dc0 VK |
880 | } |
881 | ||
882 | /* Works only on sorted freq-tables */ | |
883 | static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, | |
884 | unsigned int target_freq) | |
885 | { | |
886 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
887 | ||
888 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
889 | return cpufreq_table_find_index_ah(policy, target_freq); | |
890 | else | |
891 | return cpufreq_table_find_index_dh(policy, target_freq); | |
892 | } | |
893 | ||
894 | /* Find closest freq to target in a table in ascending order */ | |
895 | static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, | |
896 | unsigned int target_freq) | |
897 | { | |
898 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 899 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 900 | unsigned int freq; |
ffd81dcf | 901 | int idx, best = -1; |
da0c6dc0 | 902 | |
ffd81dcf | 903 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 904 | freq = pos->frequency; |
da0c6dc0 VK |
905 | |
906 | if (freq == target_freq) | |
ffd81dcf | 907 | return idx; |
da0c6dc0 VK |
908 | |
909 | if (freq < target_freq) { | |
ffd81dcf | 910 | best = idx; |
da0c6dc0 VK |
911 | continue; |
912 | } | |
913 | ||
914 | /* No freq found below target_freq */ | |
ffd81dcf DB |
915 | if (best == -1) |
916 | return idx; | |
da0c6dc0 VK |
917 | |
918 | /* Choose the closest freq */ | |
ffd81dcf DB |
919 | if (target_freq - table[best].frequency > freq - target_freq) |
920 | return idx; | |
da0c6dc0 | 921 | |
ffd81dcf | 922 | return best; |
da0c6dc0 VK |
923 | } |
924 | ||
ffd81dcf | 925 | return best; |
da0c6dc0 VK |
926 | } |
927 | ||
928 | /* Find closest freq to target in a table in descending order */ | |
929 | static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, | |
930 | unsigned int target_freq) | |
931 | { | |
932 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 933 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 934 | unsigned int freq; |
ffd81dcf | 935 | int idx, best = -1; |
da0c6dc0 | 936 | |
ffd81dcf | 937 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 938 | freq = pos->frequency; |
da0c6dc0 VK |
939 | |
940 | if (freq == target_freq) | |
ffd81dcf | 941 | return idx; |
da0c6dc0 VK |
942 | |
943 | if (freq > target_freq) { | |
ffd81dcf | 944 | best = idx; |
da0c6dc0 VK |
945 | continue; |
946 | } | |
947 | ||
948 | /* No freq found above target_freq */ | |
ffd81dcf DB |
949 | if (best == -1) |
950 | return idx; | |
da0c6dc0 VK |
951 | |
952 | /* Choose the closest freq */ | |
ffd81dcf DB |
953 | if (table[best].frequency - target_freq > target_freq - freq) |
954 | return idx; | |
da0c6dc0 | 955 | |
ffd81dcf | 956 | return best; |
da0c6dc0 VK |
957 | } |
958 | ||
ffd81dcf | 959 | return best; |
da0c6dc0 VK |
960 | } |
961 | ||
962 | /* Works only on sorted freq-tables */ | |
963 | static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, | |
964 | unsigned int target_freq) | |
965 | { | |
966 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
967 | ||
968 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
969 | return cpufreq_table_find_index_ac(policy, target_freq); | |
970 | else | |
971 | return cpufreq_table_find_index_dc(policy, target_freq); | |
972 | } | |
973 | ||
974 | static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
975 | unsigned int target_freq, | |
976 | unsigned int relation) | |
977 | { | |
978 | if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) | |
979 | return cpufreq_table_index_unsorted(policy, target_freq, | |
980 | relation); | |
981 | ||
982 | switch (relation) { | |
983 | case CPUFREQ_RELATION_L: | |
984 | return cpufreq_table_find_index_l(policy, target_freq); | |
985 | case CPUFREQ_RELATION_H: | |
986 | return cpufreq_table_find_index_h(policy, target_freq); | |
987 | case CPUFREQ_RELATION_C: | |
988 | return cpufreq_table_find_index_c(policy, target_freq); | |
989 | default: | |
30b8e6b2 VK |
990 | WARN_ON_ONCE(1); |
991 | return 0; | |
da0c6dc0 VK |
992 | } |
993 | } | |
55d85293 VK |
994 | |
995 | static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy) | |
996 | { | |
997 | struct cpufreq_frequency_table *pos; | |
998 | int count = 0; | |
999 | ||
1000 | if (unlikely(!policy->freq_table)) | |
1001 | return 0; | |
1002 | ||
1003 | cpufreq_for_each_valid_entry(pos, policy->freq_table) | |
1004 | count++; | |
1005 | ||
1006 | return count; | |
1007 | } | |
6f19efc0 LM |
1008 | #else |
1009 | static inline int cpufreq_boost_trigger_state(int state) | |
1010 | { | |
1011 | return 0; | |
1012 | } | |
6f19efc0 LM |
1013 | static inline int cpufreq_boost_enabled(void) |
1014 | { | |
1015 | return 0; | |
1016 | } | |
44139ed4 VK |
1017 | |
1018 | static inline int cpufreq_enable_boost_support(void) | |
1019 | { | |
1020 | return -EINVAL; | |
1021 | } | |
1022 | ||
1023 | static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) | |
1024 | { | |
1025 | return false; | |
1026 | } | |
6f19efc0 | 1027 | #endif |
1da177e4 | 1028 | |
531b5c9f QP |
1029 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
1030 | void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
1031 | struct cpufreq_governor *old_gov); | |
1032 | #else | |
1033 | static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
1034 | struct cpufreq_governor *old_gov) { } | |
1035 | #endif | |
1036 | ||
7d5905dc | 1037 | extern void arch_freq_prepare_all(void); |
f8475cef LB |
1038 | extern unsigned int arch_freq_get_on_cpu(int cpu); |
1039 | ||
a20b7053 IV |
1040 | #ifndef arch_set_freq_scale |
1041 | static __always_inline | |
1042 | void arch_set_freq_scale(const struct cpumask *cpus, | |
1043 | unsigned long cur_freq, | |
1044 | unsigned long max_freq) | |
1045 | { | |
1046 | } | |
1047 | #endif | |
e7d5459d | 1048 | |
1da177e4 LT |
1049 | /* the following are really really optional */ |
1050 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
21c36d35 | 1051 | extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; |
18434512 | 1052 | extern struct freq_attr *cpufreq_generic_attr[]; |
d417e069 | 1053 | int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy); |
f4fd3797 | 1054 | |
652ed95d | 1055 | unsigned int cpufreq_generic_get(unsigned int cpu); |
c4dcc8a1 | 1056 | void cpufreq_generic_init(struct cpufreq_policy *policy, |
70e9e778 VK |
1057 | struct cpufreq_frequency_table *table, |
1058 | unsigned int transition_latency); | |
1da177e4 | 1059 | #endif /* _LINUX_CPUFREQ_H */ |