Commit | Line | Data |
---|---|---|
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> |
c17495b0 | 12 | #include <linux/cpu.h> |
5ff0a268 VK |
13 | #include <linux/cpumask.h> |
14 | #include <linux/completion.h> | |
1da177e4 | 15 | #include <linux/kobject.h> |
5ff0a268 | 16 | #include <linux/notifier.h> |
8486a32d HY |
17 | #include <linux/of.h> |
18 | #include <linux/of_device.h> | |
c17495b0 | 19 | #include <linux/pm_opp.h> |
3000ce3c | 20 | #include <linux/pm_qos.h> |
12478cf0 | 21 | #include <linux/spinlock.h> |
1da177e4 | 22 | #include <linux/sysfs.h> |
1da177e4 | 23 | |
1da177e4 | 24 | /********************************************************************* |
74aca95d | 25 | * CPUFREQ INTERFACE * |
1da177e4 | 26 | *********************************************************************/ |
74aca95d VK |
27 | /* |
28 | * Frequency values here are CPU kHz | |
29 | * | |
b53cc6ea | 30 | * Maximum transition latency is in nanoseconds - if it's unknown, |
1da177e4 LT |
31 | * CPUFREQ_ETERNAL shall be used. |
32 | */ | |
33 | ||
74aca95d VK |
34 | #define CPUFREQ_ETERNAL (-1) |
35 | #define CPUFREQ_NAME_LEN 16 | |
565ebe80 | 36 | /* Print length for names. Extra 1 space for accommodating '\n' in prints */ |
74aca95d VK |
37 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
38 | ||
1da177e4 LT |
39 | struct cpufreq_governor; |
40 | ||
da0c6dc0 VK |
41 | enum cpufreq_table_sorting { |
42 | CPUFREQ_TABLE_UNSORTED, | |
43 | CPUFREQ_TABLE_SORTED_ASCENDING, | |
44 | CPUFREQ_TABLE_SORTED_DESCENDING | |
45 | }; | |
46 | ||
1da177e4 LT |
47 | struct cpufreq_cpuinfo { |
48 | unsigned int max_freq; | |
49 | unsigned int min_freq; | |
335dc333 TF |
50 | |
51 | /* in 10^(-9) s = nanoseconds */ | |
52 | unsigned int transition_latency; | |
1da177e4 LT |
53 | }; |
54 | ||
1da177e4 | 55 | struct cpufreq_policy { |
951fc5f4 VK |
56 | /* CPUs sharing clock, require sw coordination */ |
57 | cpumask_var_t cpus; /* Online CPUs only */ | |
58 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
559ed407 | 59 | cpumask_var_t real_cpus; /* Related and present */ |
951fc5f4 | 60 | |
62b36cc1 | 61 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 62 | should set cpufreq */ |
9d16f207 | 63 | unsigned int cpu; /* cpu managing this policy, must be online */ |
9d16f207 | 64 | |
652ed95d | 65 | struct clk *clk; |
1da177e4 LT |
66 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
67 | ||
68 | unsigned int min; /* in kHz */ | |
69 | unsigned int max; /* in kHz */ | |
70 | unsigned int cur; /* in kHz, only needed if cpufreq | |
71 | * governors are used */ | |
e28867ea VK |
72 | unsigned int suspend_freq; /* freq to set during suspend */ |
73 | ||
335dc333 | 74 | unsigned int policy; /* see above */ |
69030dd1 | 75 | unsigned int last_policy; /* policy before unplug */ |
1da177e4 | 76 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 77 | void *governor_data; |
4573237b | 78 | char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
1da177e4 | 79 | |
1da177e4 LT |
80 | struct work_struct update; /* if update_policy() needs to be |
81 | * called, but you're in IRQ context */ | |
82 | ||
3000ce3c RW |
83 | struct freq_constraints constraints; |
84 | struct freq_qos_request *min_freq_req; | |
85 | struct freq_qos_request *max_freq_req; | |
86 | ||
e0b3165b | 87 | struct cpufreq_frequency_table *freq_table; |
da0c6dc0 | 88 | enum cpufreq_table_sorting freq_table_sorted; |
1da177e4 | 89 | |
c88a1f8b | 90 | struct list_head policy_list; |
1da177e4 LT |
91 | struct kobject kobj; |
92 | struct completion kobj_unregister; | |
ad7722da | 93 | |
94 | /* | |
95 | * The rules for this semaphore: | |
96 | * - Any routine that wants to read from the policy structure will | |
97 | * do a down_read on this semaphore. | |
98 | * - Any routine that will write to the policy structure and/or may take away | |
99 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
100 | * mode before doing so. | |
ad7722da | 101 | */ |
102 | struct rw_semaphore rwsem; | |
12478cf0 | 103 | |
b7898fda RW |
104 | /* |
105 | * Fast switch flags: | |
106 | * - fast_switch_possible should be set by the driver if it can | |
107 | * guarantee that frequency can be changed on any CPU sharing the | |
108 | * policy and that the change will affect all of the policy CPUs then. | |
109 | * - fast_switch_enabled is to be set by governors that support fast | |
565ebe80 | 110 | * frequency switching with the help of cpufreq_enable_fast_switch(). |
b7898fda RW |
111 | */ |
112 | bool fast_switch_possible; | |
113 | bool fast_switch_enabled; | |
114 | ||
ea9364bb RW |
115 | /* |
116 | * Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current | |
117 | * governor. | |
118 | */ | |
119 | bool strict_target; | |
120 | ||
1f39fa0d VD |
121 | /* |
122 | * Set if inefficient frequencies were found in the frequency table. | |
123 | * This indicates if the relation flag CPUFREQ_RELATION_E can be | |
124 | * honored. | |
125 | */ | |
126 | bool efficiencies_available; | |
127 | ||
1b72e7fd RW |
128 | /* |
129 | * Preferred average time interval between consecutive invocations of | |
130 | * the driver to set the frequency for this policy. To be set by the | |
131 | * scaling driver (0, which is the default, means no preference). | |
132 | */ | |
133 | unsigned int transition_delay_us; | |
134 | ||
99d14d0e VK |
135 | /* |
136 | * Remote DVFS flag (Not added to the driver structure as we don't want | |
137 | * to access another structure from scheduler hotpath). | |
138 | * | |
139 | * Should be set if CPUs can do DVFS on behalf of other CPUs from | |
140 | * different cpufreq policies. | |
141 | */ | |
142 | bool dvfs_possible_from_any_cpu; | |
143 | ||
e3c06236 SM |
144 | /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ |
145 | unsigned int cached_target_freq; | |
292072c3 | 146 | unsigned int cached_resolved_idx; |
e3c06236 | 147 | |
12478cf0 SB |
148 | /* Synchronization for frequency transitions */ |
149 | bool transition_ongoing; /* Tracks transition status */ | |
150 | spinlock_t transition_lock; | |
151 | wait_queue_head_t transition_wait; | |
ca654dc3 | 152 | struct task_struct *transition_task; /* Task which is doing the transition */ |
413fffc3 | 153 | |
a9aaf291 VK |
154 | /* cpufreq-stats */ |
155 | struct cpufreq_stats *stats; | |
156 | ||
413fffc3 VK |
157 | /* For cpufreq driver's internal use */ |
158 | void *driver_data; | |
5c238a8b AK |
159 | |
160 | /* Pointer to the cooling device if used for thermal mitigation */ | |
161 | struct thermal_cooling_device *cdev; | |
67d874c3 VK |
162 | |
163 | struct notifier_block nb_min; | |
164 | struct notifier_block nb_max; | |
1da177e4 LT |
165 | }; |
166 | ||
1e4f63ae RW |
167 | /* |
168 | * Used for passing new cpufreq policy data to the cpufreq driver's ->verify() | |
169 | * callback for sanitization. That callback is only expected to modify the min | |
170 | * and max values, if necessary, and specifically it must not update the | |
171 | * frequency table. | |
172 | */ | |
173 | struct cpufreq_policy_data { | |
174 | struct cpufreq_cpuinfo cpuinfo; | |
175 | struct cpufreq_frequency_table *freq_table; | |
176 | unsigned int cpu; | |
177 | unsigned int min; /* in kHz */ | |
178 | unsigned int max; /* in kHz */ | |
179 | }; | |
180 | ||
df24014a VK |
181 | struct cpufreq_freqs { |
182 | struct cpufreq_policy *policy; | |
183 | unsigned int old; | |
184 | unsigned int new; | |
185 | u8 flags; /* flags of cpufreq_driver, see below. */ | |
186 | }; | |
187 | ||
62b36cc1 | 188 | /* Only for ACPI */ |
46f18e3a VP |
189 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
190 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
191 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
192 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 193 | |
c75b505d | 194 | #ifdef CONFIG_CPU_FREQ |
1f0bd44e | 195 | struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); |
74aca95d | 196 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 197 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d | 198 | #else |
1f0bd44e RW |
199 | static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) |
200 | { | |
201 | return NULL; | |
202 | } | |
c75b505d DV |
203 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
204 | { | |
205 | return NULL; | |
206 | } | |
207 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
208 | #endif | |
74aca95d | 209 | |
9083e498 RW |
210 | static inline bool policy_is_inactive(struct cpufreq_policy *policy) |
211 | { | |
212 | return cpumask_empty(policy->cpus); | |
213 | } | |
214 | ||
2624f90c FB |
215 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
216 | { | |
217 | return cpumask_weight(policy->cpus) > 1; | |
218 | } | |
219 | ||
74aca95d VK |
220 | #ifdef CONFIG_CPU_FREQ |
221 | unsigned int cpufreq_get(unsigned int cpu); | |
222 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
223 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
bbce8eaa | 224 | unsigned int cpufreq_get_hw_max_freq(unsigned int cpu); |
74aca95d | 225 | void disable_cpufreq(void); |
1da177e4 | 226 | |
74aca95d | 227 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
9083e498 RW |
228 | |
229 | struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu); | |
230 | void cpufreq_cpu_release(struct cpufreq_policy *policy); | |
74aca95d | 231 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
c57b25bd | 232 | void refresh_frequency_limits(struct cpufreq_policy *policy); |
30248fef | 233 | void cpufreq_update_policy(unsigned int cpu); |
5a25e3f7 | 234 | void cpufreq_update_limits(unsigned int cpu); |
74aca95d | 235 | bool have_governor_per_policy(void); |
874f6353 | 236 | bool cpufreq_supports_freq_invariance(void); |
74aca95d | 237 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); |
b7898fda | 238 | void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); |
6c9d9c81 | 239 | void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); |
74aca95d VK |
240 | #else |
241 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 242 | { |
74aca95d VK |
243 | return 0; |
244 | } | |
245 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
246 | { | |
247 | return 0; | |
248 | } | |
249 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
250 | { | |
251 | return 0; | |
252 | } | |
bbce8eaa IV |
253 | static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu) |
254 | { | |
255 | return 0; | |
256 | } | |
874f6353 IV |
257 | static inline bool cpufreq_supports_freq_invariance(void) |
258 | { | |
259 | return false; | |
260 | } | |
74aca95d | 261 | static inline void disable_cpufreq(void) { } |
1da177e4 | 262 | #endif |
1da177e4 | 263 | |
1aefc75b RW |
264 | #ifdef CONFIG_CPU_FREQ_STAT |
265 | void cpufreq_stats_create_table(struct cpufreq_policy *policy); | |
266 | void cpufreq_stats_free_table(struct cpufreq_policy *policy); | |
267 | void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
268 | unsigned int new_freq); | |
269 | #else | |
270 | static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } | |
271 | static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } | |
272 | static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
273 | unsigned int new_freq) { } | |
274 | #endif /* CONFIG_CPU_FREQ_STAT */ | |
275 | ||
1da177e4 | 276 | /********************************************************************* |
74aca95d | 277 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
278 | *********************************************************************/ |
279 | ||
74aca95d VK |
280 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
281 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
5b0c0b16 | 282 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
1f39fa0d VD |
283 | /* relation flags */ |
284 | #define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */ | |
1da177e4 | 285 | |
b894d20e VD |
286 | #define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E) |
287 | #define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E) | |
288 | #define CPUFREQ_RELATION_CE (CPUFREQ_RELATION_C | CPUFREQ_RELATION_E) | |
1da177e4 | 289 | |
74aca95d VK |
290 | struct freq_attr { |
291 | struct attribute attr; | |
292 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
293 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
294 | }; |
295 | ||
74aca95d VK |
296 | #define cpufreq_freq_attr_ro(_name) \ |
297 | static struct freq_attr _name = \ | |
298 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 299 | |
74aca95d VK |
300 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
301 | static struct freq_attr _name = \ | |
302 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 303 | |
74aca95d VK |
304 | #define cpufreq_freq_attr_rw(_name) \ |
305 | static struct freq_attr _name = \ | |
306 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
307 | ||
ee7930ee MM |
308 | #define cpufreq_freq_attr_wo(_name) \ |
309 | static struct freq_attr _name = \ | |
310 | __ATTR(_name, 0200, NULL, store_##_name) | |
311 | ||
74aca95d | 312 | #define define_one_global_ro(_name) \ |
625c85a6 | 313 | static struct kobj_attribute _name = \ |
74aca95d VK |
314 | __ATTR(_name, 0444, show_##_name, NULL) |
315 | ||
316 | #define define_one_global_rw(_name) \ | |
625c85a6 | 317 | static struct kobj_attribute _name = \ |
74aca95d | 318 | __ATTR(_name, 0644, show_##_name, store_##_name) |
1da177e4 | 319 | |
1da177e4 LT |
320 | |
321 | struct cpufreq_driver { | |
90452e61 | 322 | char name[CPUFREQ_NAME_LEN]; |
1c534352 | 323 | u16 flags; |
90452e61 | 324 | void *driver_data; |
1da177e4 LT |
325 | |
326 | /* needed by all drivers */ | |
90452e61 | 327 | int (*init)(struct cpufreq_policy *policy); |
1e4f63ae | 328 | int (*verify)(struct cpufreq_policy_data *policy); |
1da177e4 LT |
329 | |
330 | /* define one out of two */ | |
90452e61 | 331 | int (*setpolicy)(struct cpufreq_policy *policy); |
1c03a2d0 | 332 | |
90452e61 VK |
333 | int (*target)(struct cpufreq_policy *policy, |
334 | unsigned int target_freq, | |
335 | unsigned int relation); /* Deprecated */ | |
336 | int (*target_index)(struct cpufreq_policy *policy, | |
337 | unsigned int index); | |
b7898fda RW |
338 | unsigned int (*fast_switch)(struct cpufreq_policy *policy, |
339 | unsigned int target_freq); | |
ee2cc427 RW |
340 | /* |
341 | * ->fast_switch() replacement for drivers that use an internal | |
342 | * representation of performance levels and can pass hints other than | |
343 | * the target performance level to the hardware. | |
344 | */ | |
345 | void (*adjust_perf)(unsigned int cpu, | |
346 | unsigned long min_perf, | |
347 | unsigned long target_perf, | |
348 | unsigned long capacity); | |
e3c06236 | 349 | |
1c03a2d0 VK |
350 | /* |
351 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
352 | * unset. | |
353 | * | |
354 | * get_intermediate should return a stable intermediate frequency | |
355 | * platform wants to switch to and target_intermediate() should set CPU | |
2909438d | 356 | * to that frequency, before jumping to the frequency corresponding |
1c03a2d0 VK |
357 | * to 'index'. Core will take care of sending notifications and driver |
358 | * doesn't have to handle them in target_intermediate() or | |
359 | * target_index(). | |
360 | * | |
361 | * Drivers can return '0' from get_intermediate() in case they don't | |
362 | * wish to switch to intermediate frequency for some target frequency. | |
363 | * In that case core will directly call ->target_index(). | |
364 | */ | |
90452e61 VK |
365 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
366 | unsigned int index); | |
367 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
368 | unsigned int index); | |
1da177e4 LT |
369 | |
370 | /* should be defined, if possible */ | |
90452e61 | 371 | unsigned int (*get)(unsigned int cpu); |
1da177e4 | 372 | |
5a25e3f7 RW |
373 | /* Called to update policy limits on firmware notifications. */ |
374 | void (*update_limits)(unsigned int cpu); | |
375 | ||
1da177e4 | 376 | /* optional */ |
90452e61 | 377 | int (*bios_limit)(int cpu, unsigned int *limit); |
bf0b90e3 | 378 | |
91a12e91 VK |
379 | int (*online)(struct cpufreq_policy *policy); |
380 | int (*offline)(struct cpufreq_policy *policy); | |
90452e61 | 381 | int (*exit)(struct cpufreq_policy *policy); |
90452e61 VK |
382 | int (*suspend)(struct cpufreq_policy *policy); |
383 | int (*resume)(struct cpufreq_policy *policy); | |
7c45cf31 | 384 | |
4f774c4a BA |
385 | /* Will be called after the driver is fully initialized */ |
386 | void (*ready)(struct cpufreq_policy *policy); | |
387 | ||
90452e61 | 388 | struct freq_attr **attr; |
6f19efc0 LM |
389 | |
390 | /* platform specific boost support code */ | |
90452e61 | 391 | bool boost_enabled; |
cf6fada7 | 392 | int (*set_boost)(struct cpufreq_policy *policy, int state); |
c17495b0 VK |
393 | |
394 | /* | |
395 | * Set by drivers that want to register with the energy model after the | |
396 | * policy is properly initialized, but before the governor is started. | |
397 | */ | |
398 | void (*register_em)(struct cpufreq_policy *policy); | |
1da177e4 LT |
399 | }; |
400 | ||
401 | /* flags */ | |
8321be6a | 402 | |
5ae4a4b4 | 403 | /* |
3598b30b | 404 | * Set by drivers that need to update internal upper and lower boundaries along |
5ae4a4b4 VK |
405 | * with the target frequency and so the core and governors should also invoke |
406 | * the diver if the target frequency does not change, but the policy min or max | |
407 | * may have changed. | |
408 | */ | |
409 | #define CPUFREQ_NEED_UPDATE_LIMITS BIT(0) | |
8321be6a AK |
410 | |
411 | /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ | |
412 | #define CPUFREQ_CONST_LOOPS BIT(1) | |
413 | ||
2f053186 VK |
414 | /* |
415 | * Set by drivers that want the core to automatically register the cpufreq | |
416 | * driver as a thermal cooling device. | |
417 | */ | |
418 | #define CPUFREQ_IS_COOLING_DEV BIT(2) | |
1da177e4 | 419 | |
0b981e70 VK |
420 | /* |
421 | * This should be set by platforms having multiple clock-domains, i.e. | |
422 | * supporting multiple policies. With this sysfs directories of governor would | |
423 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
424 | * governor with different tunables for different clusters. | |
425 | */ | |
8321be6a | 426 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) |
0b981e70 | 427 | |
7dbf694d VK |
428 | /* |
429 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
430 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
431 | * can handle them specially. | |
432 | */ | |
8321be6a | 433 | #define CPUFREQ_ASYNC_NOTIFICATION BIT(4) |
7dbf694d | 434 | |
ae6b4271 VK |
435 | /* |
436 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
437 | * frequency present in freq-table exposed by the driver. For these drivers if | |
438 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
439 | * from the table. And if that fails, we will stop further boot process by | |
440 | * issuing a BUG_ON(). | |
441 | */ | |
8321be6a | 442 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) |
ae6b4271 | 443 | |
fe829ed8 VK |
444 | /* |
445 | * Set by drivers to disallow use of governors with "dynamic_switching" flag | |
446 | * set. | |
447 | */ | |
8321be6a | 448 | #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) |
fe829ed8 | 449 | |
221dee28 LT |
450 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
451 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 452 | |
a62f68f5 | 453 | bool cpufreq_driver_test_flags(u16 flags); |
74aca95d | 454 | const char *cpufreq_get_current_driver(void); |
51315cdf | 455 | void *cpufreq_get_driver_data(void); |
1da177e4 | 456 | |
bcc61569 DL |
457 | static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv) |
458 | { | |
459 | return IS_ENABLED(CONFIG_CPU_THERMAL) && | |
460 | (drv->flags & CPUFREQ_IS_COOLING_DEV); | |
461 | } | |
462 | ||
1e4f63ae RW |
463 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy, |
464 | unsigned int min, | |
465 | unsigned int max) | |
1da177e4 LT |
466 | { |
467 | if (policy->min < min) | |
468 | policy->min = min; | |
469 | if (policy->max < min) | |
470 | policy->max = min; | |
471 | if (policy->min > max) | |
472 | policy->min = max; | |
473 | if (policy->max > max) | |
474 | policy->max = max; | |
475 | if (policy->min > policy->max) | |
476 | policy->min = policy->max; | |
477 | return; | |
478 | } | |
479 | ||
be49e346 | 480 | static inline void |
1e4f63ae | 481 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy) |
be49e346 VK |
482 | { |
483 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
1e4f63ae | 484 | policy->cpuinfo.max_freq); |
be49e346 VK |
485 | } |
486 | ||
2f0aea93 VK |
487 | #ifdef CONFIG_CPU_FREQ |
488 | void cpufreq_suspend(void); | |
489 | void cpufreq_resume(void); | |
e28867ea | 490 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
491 | #else |
492 | static inline void cpufreq_suspend(void) {} | |
493 | static inline void cpufreq_resume(void) {} | |
494 | #endif | |
495 | ||
74aca95d VK |
496 | /********************************************************************* |
497 | * CPUFREQ NOTIFIER INTERFACE * | |
498 | *********************************************************************/ | |
6dad2a29 | 499 | |
74aca95d VK |
500 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
501 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 502 | |
74aca95d VK |
503 | /* Transition notifiers */ |
504 | #define CPUFREQ_PRECHANGE (0) | |
505 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 506 | |
74aca95d | 507 | /* Policy Notifiers */ |
df0eea44 VK |
508 | #define CPUFREQ_CREATE_POLICY (0) |
509 | #define CPUFREQ_REMOVE_POLICY (1) | |
6dad2a29 | 510 | |
74aca95d VK |
511 | #ifdef CONFIG_CPU_FREQ |
512 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
513 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 514 | |
12478cf0 SB |
515 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
516 | struct cpufreq_freqs *freqs); | |
517 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
518 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 519 | |
74aca95d VK |
520 | #else /* CONFIG_CPU_FREQ */ |
521 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
522 | unsigned int list) | |
2eca40a8 RD |
523 | { |
524 | return 0; | |
525 | } | |
74aca95d VK |
526 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
527 | unsigned int list) | |
95235ca2 VP |
528 | { |
529 | return 0; | |
530 | } | |
74aca95d VK |
531 | #endif /* !CONFIG_CPU_FREQ */ |
532 | ||
533 | /** | |
534 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
535 | * safe) | |
536 | * @old: old value | |
537 | * @div: divisor | |
538 | * @mult: multiplier | |
539 | * | |
540 | * | |
541 | * new = old * mult / div | |
542 | */ | |
543 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
544 | u_int mult) | |
3d737108 | 545 | { |
74aca95d VK |
546 | #if BITS_PER_LONG == 32 |
547 | u64 result = ((u64) old) * ((u64) mult); | |
548 | do_div(result, div); | |
549 | return (unsigned long) result; | |
550 | ||
551 | #elif BITS_PER_LONG == 64 | |
552 | unsigned long result = old * ((u64) mult); | |
553 | result /= div; | |
554 | return result; | |
95235ca2 | 555 | #endif |
74aca95d | 556 | } |
95235ca2 | 557 | |
1da177e4 | 558 | /********************************************************************* |
74aca95d | 559 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
560 | *********************************************************************/ |
561 | ||
1e4f63ae | 562 | #define CPUFREQ_POLICY_UNKNOWN (0) |
74aca95d VK |
563 | /* |
564 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
565 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
566 | * two generic policies are available: | |
567 | */ | |
568 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
569 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
570 | ||
379480d8 RW |
571 | /* |
572 | * The polling frequency depends on the capability of the processor. Default | |
573 | * polling frequency is 1000 times the transition latency of the processor. The | |
574 | * ondemand governor will work on any processor with transition latency <= 10ms, | |
575 | * using appropriate sampling rate. | |
379480d8 | 576 | */ |
379480d8 | 577 | #define LATENCY_MULTIPLIER (1000) |
379480d8 | 578 | |
74aca95d VK |
579 | struct cpufreq_governor { |
580 | char name[CPUFREQ_NAME_LEN]; | |
e788892b RW |
581 | int (*init)(struct cpufreq_policy *policy); |
582 | void (*exit)(struct cpufreq_policy *policy); | |
583 | int (*start)(struct cpufreq_policy *policy); | |
584 | void (*stop)(struct cpufreq_policy *policy); | |
585 | void (*limits)(struct cpufreq_policy *policy); | |
74aca95d VK |
586 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
587 | char *buf); | |
588 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
589 | unsigned int freq); | |
74aca95d VK |
590 | struct list_head governor_list; |
591 | struct module *owner; | |
9a2a9ebc | 592 | u8 flags; |
74aca95d VK |
593 | }; |
594 | ||
9a2a9ebc RW |
595 | /* Governor flags */ |
596 | ||
597 | /* For governors which change frequency dynamically by themselves */ | |
598 | #define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0) | |
599 | ||
218f6687 RW |
600 | /* For governors wanting the target frequency to be set exactly */ |
601 | #define CPUFREQ_GOV_STRICT_TARGET BIT(1) | |
602 | ||
9a2a9ebc | 603 | |
74aca95d | 604 | /* Pass a target to the cpufreq driver */ |
b7898fda RW |
605 | unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, |
606 | unsigned int target_freq); | |
ee2cc427 RW |
607 | void cpufreq_driver_adjust_perf(unsigned int cpu, |
608 | unsigned long min_perf, | |
609 | unsigned long target_perf, | |
610 | unsigned long capacity); | |
611 | bool cpufreq_driver_has_adjust_perf(void); | |
74aca95d VK |
612 | int cpufreq_driver_target(struct cpufreq_policy *policy, |
613 | unsigned int target_freq, | |
614 | unsigned int relation); | |
615 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
616 | unsigned int target_freq, | |
617 | unsigned int relation); | |
e3c06236 SM |
618 | unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, |
619 | unsigned int target_freq); | |
aa7519af | 620 | unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy); |
74aca95d VK |
621 | int cpufreq_register_governor(struct cpufreq_governor *governor); |
622 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
f6ebbcf0 RW |
623 | int cpufreq_start_governor(struct cpufreq_policy *policy); |
624 | void cpufreq_stop_governor(struct cpufreq_policy *policy); | |
74aca95d | 625 | |
10dd8573 QP |
626 | #define cpufreq_governor_init(__governor) \ |
627 | static int __init __governor##_init(void) \ | |
628 | { \ | |
629 | return cpufreq_register_governor(&__governor); \ | |
630 | } \ | |
631 | core_initcall(__governor##_init) | |
632 | ||
633 | #define cpufreq_governor_exit(__governor) \ | |
634 | static void __exit __governor##_exit(void) \ | |
635 | { \ | |
636 | return cpufreq_unregister_governor(&__governor); \ | |
637 | } \ | |
638 | module_exit(__governor##_exit) | |
639 | ||
de1df26b RW |
640 | struct cpufreq_governor *cpufreq_default_governor(void); |
641 | struct cpufreq_governor *cpufreq_fallback_governor(void); | |
1da177e4 | 642 | |
bf2be2de VK |
643 | static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) |
644 | { | |
645 | if (policy->max < policy->cur) | |
b894d20e VD |
646 | __cpufreq_driver_target(policy, policy->max, |
647 | CPUFREQ_RELATION_HE); | |
bf2be2de | 648 | else if (policy->min > policy->cur) |
b894d20e VD |
649 | __cpufreq_driver_target(policy, policy->min, |
650 | CPUFREQ_RELATION_LE); | |
bf2be2de VK |
651 | } |
652 | ||
66893b6a RW |
653 | /* Governor attribute set */ |
654 | struct gov_attr_set { | |
655 | struct kobject kobj; | |
656 | struct list_head policy_list; | |
657 | struct mutex update_lock; | |
658 | int usage_count; | |
659 | }; | |
660 | ||
661 | /* sysfs ops for cpufreq governors */ | |
662 | extern const struct sysfs_ops governor_sysfs_ops; | |
663 | ||
ae265086 KH |
664 | static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj) |
665 | { | |
666 | return container_of(kobj, struct gov_attr_set, kobj); | |
667 | } | |
668 | ||
66893b6a RW |
669 | void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); |
670 | void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); | |
671 | unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); | |
672 | ||
673 | /* Governor sysfs attribute */ | |
674 | struct governor_attr { | |
675 | struct attribute attr; | |
676 | ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); | |
677 | ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, | |
678 | size_t count); | |
679 | }; | |
680 | ||
1da177e4 LT |
681 | /********************************************************************* |
682 | * FREQUENCY TABLE HELPERS * | |
683 | *********************************************************************/ | |
684 | ||
7f4b0461 | 685 | /* Special Values of .frequency field */ |
442d24a5 VD |
686 | #define CPUFREQ_ENTRY_INVALID ~0u |
687 | #define CPUFREQ_TABLE_END ~1u | |
7f4b0461 | 688 | /* Special Values of .flags field */ |
442d24a5 VD |
689 | #define CPUFREQ_BOOST_FREQ (1 << 0) |
690 | #define CPUFREQ_INEFFICIENT_FREQ (1 << 1) | |
1da177e4 LT |
691 | |
692 | struct cpufreq_frequency_table { | |
7f4b0461 | 693 | unsigned int flags; |
50701588 | 694 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
695 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
696 | * order */ | |
697 | }; | |
698 | ||
a0dd7b79 NM |
699 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
700 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
701 | struct cpufreq_frequency_table **table); | |
702 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
703 | struct cpufreq_frequency_table **table); | |
704 | #else | |
705 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
706 | struct cpufreq_frequency_table | |
707 | **table) | |
708 | { | |
709 | return -EINVAL; | |
710 | } | |
711 | ||
712 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
713 | struct cpufreq_frequency_table | |
714 | **table) | |
715 | { | |
716 | } | |
717 | #endif | |
718 | ||
27e289dc SK |
719 | /* |
720 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
721 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
722 | * @table: the cpufreq_frequency_table * to iterate over. | |
723 | */ | |
724 | ||
725 | #define cpufreq_for_each_entry(pos, table) \ | |
726 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
727 | ||
ffd81dcf DB |
728 | /* |
729 | * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table | |
730 | * with index | |
731 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
732 | * @table: the cpufreq_frequency_table * to iterate over. | |
733 | * @idx: the table entry currently being processed | |
734 | */ | |
735 | ||
736 | #define cpufreq_for_each_entry_idx(pos, table, idx) \ | |
737 | for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ | |
738 | pos++, idx++) | |
739 | ||
27e289dc SK |
740 | /* |
741 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
742 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
743 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
744 | * @table: the cpufreq_frequency_table * to iterate over. | |
745 | */ | |
746 | ||
34b08705 RW |
747 | #define cpufreq_for_each_valid_entry(pos, table) \ |
748 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ | |
749 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
750 | continue; \ | |
751 | else | |
27e289dc | 752 | |
ffd81dcf DB |
753 | /* |
754 | * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq | |
755 | * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies. | |
756 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
757 | * @table: the cpufreq_frequency_table * to iterate over. | |
758 | * @idx: the table entry currently being processed | |
759 | */ | |
760 | ||
761 | #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \ | |
762 | cpufreq_for_each_entry_idx(pos, table, idx) \ | |
763 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
764 | continue; \ | |
765 | else | |
766 | ||
1f39fa0d VD |
767 | /** |
768 | * cpufreq_for_each_efficient_entry_idx - iterate with index over a cpufreq | |
769 | * frequency_table excluding CPUFREQ_ENTRY_INVALID and | |
770 | * CPUFREQ_INEFFICIENT_FREQ frequencies. | |
771 | * @pos: the &struct cpufreq_frequency_table to use as a loop cursor. | |
772 | * @table: the &struct cpufreq_frequency_table to iterate over. | |
773 | * @idx: the table entry currently being processed. | |
774 | * @efficiencies: set to true to only iterate over efficient frequencies. | |
775 | */ | |
776 | ||
777 | #define cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) \ | |
778 | cpufreq_for_each_valid_entry_idx(pos, table, idx) \ | |
779 | if (efficiencies && (pos->flags & CPUFREQ_INEFFICIENT_FREQ)) \ | |
780 | continue; \ | |
781 | else | |
782 | ||
ffd81dcf | 783 | |
1da177e4 LT |
784 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
785 | struct cpufreq_frequency_table *table); | |
786 | ||
1e4f63ae | 787 | int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy, |
1da177e4 | 788 | struct cpufreq_frequency_table *table); |
1e4f63ae | 789 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy); |
1da177e4 | 790 | |
da0c6dc0 VK |
791 | int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, |
792 | unsigned int target_freq, | |
793 | unsigned int relation); | |
d3916691 VK |
794 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
795 | unsigned int freq); | |
1da177e4 | 796 | |
74aca95d VK |
797 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
798 | ||
6f19efc0 LM |
799 | #ifdef CONFIG_CPU_FREQ |
800 | int cpufreq_boost_trigger_state(int state); | |
6f19efc0 | 801 | int cpufreq_boost_enabled(void); |
44139ed4 VK |
802 | int cpufreq_enable_boost_support(void); |
803 | bool policy_has_boost_freq(struct cpufreq_policy *policy); | |
da0c6dc0 VK |
804 | |
805 | /* Find lowest freq at or above target in a table in ascending order */ | |
806 | static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, | |
1f39fa0d VD |
807 | unsigned int target_freq, |
808 | bool efficiencies) | |
da0c6dc0 VK |
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 | |
1f39fa0d | 815 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
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 | /* Find lowest freq at or above target in a table in descending order */ | |
828 | static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, | |
1f39fa0d VD |
829 | unsigned int target_freq, |
830 | bool efficiencies) | |
da0c6dc0 VK |
831 | { |
832 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 833 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 834 | unsigned int freq; |
ffd81dcf | 835 | int idx, best = -1; |
da0c6dc0 | 836 | |
1f39fa0d | 837 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
899bb664 | 838 | freq = pos->frequency; |
da0c6dc0 VK |
839 | |
840 | if (freq == target_freq) | |
ffd81dcf | 841 | return idx; |
da0c6dc0 VK |
842 | |
843 | if (freq > target_freq) { | |
ffd81dcf | 844 | best = idx; |
da0c6dc0 VK |
845 | continue; |
846 | } | |
847 | ||
848 | /* No freq found above target_freq */ | |
ffd81dcf DB |
849 | if (best == -1) |
850 | return idx; | |
da0c6dc0 | 851 | |
ffd81dcf | 852 | return best; |
da0c6dc0 VK |
853 | } |
854 | ||
ffd81dcf | 855 | return best; |
da0c6dc0 VK |
856 | } |
857 | ||
858 | /* Works only on sorted freq-tables */ | |
859 | static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, | |
1f39fa0d VD |
860 | unsigned int target_freq, |
861 | bool efficiencies) | |
da0c6dc0 VK |
862 | { |
863 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
864 | ||
865 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
1f39fa0d VD |
866 | return cpufreq_table_find_index_al(policy, target_freq, |
867 | efficiencies); | |
da0c6dc0 | 868 | else |
1f39fa0d VD |
869 | return cpufreq_table_find_index_dl(policy, target_freq, |
870 | efficiencies); | |
da0c6dc0 VK |
871 | } |
872 | ||
873 | /* Find highest freq at or below target in a table in ascending order */ | |
874 | static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, | |
1f39fa0d VD |
875 | unsigned int target_freq, |
876 | bool efficiencies) | |
da0c6dc0 VK |
877 | { |
878 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 879 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 880 | unsigned int freq; |
ffd81dcf | 881 | int idx, best = -1; |
da0c6dc0 | 882 | |
1f39fa0d | 883 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
899bb664 | 884 | freq = pos->frequency; |
da0c6dc0 VK |
885 | |
886 | if (freq == target_freq) | |
ffd81dcf | 887 | return idx; |
da0c6dc0 VK |
888 | |
889 | if (freq < target_freq) { | |
ffd81dcf | 890 | best = idx; |
da0c6dc0 VK |
891 | continue; |
892 | } | |
893 | ||
894 | /* No freq found below target_freq */ | |
ffd81dcf DB |
895 | if (best == -1) |
896 | return idx; | |
da0c6dc0 | 897 | |
ffd81dcf | 898 | return best; |
da0c6dc0 VK |
899 | } |
900 | ||
ffd81dcf | 901 | return best; |
da0c6dc0 VK |
902 | } |
903 | ||
904 | /* Find highest freq at or below target in a table in descending order */ | |
905 | static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, | |
1f39fa0d VD |
906 | unsigned int target_freq, |
907 | bool efficiencies) | |
da0c6dc0 VK |
908 | { |
909 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 910 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 911 | unsigned int freq; |
ffd81dcf | 912 | int idx, best = -1; |
da0c6dc0 | 913 | |
1f39fa0d | 914 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
899bb664 | 915 | freq = pos->frequency; |
da0c6dc0 VK |
916 | |
917 | if (freq <= target_freq) | |
ffd81dcf | 918 | return idx; |
da0c6dc0 | 919 | |
ffd81dcf | 920 | best = idx; |
da0c6dc0 VK |
921 | } |
922 | ||
ffd81dcf | 923 | return best; |
da0c6dc0 VK |
924 | } |
925 | ||
926 | /* Works only on sorted freq-tables */ | |
927 | static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, | |
1f39fa0d VD |
928 | unsigned int target_freq, |
929 | bool efficiencies) | |
da0c6dc0 VK |
930 | { |
931 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
932 | ||
933 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
1f39fa0d VD |
934 | return cpufreq_table_find_index_ah(policy, target_freq, |
935 | efficiencies); | |
da0c6dc0 | 936 | else |
1f39fa0d VD |
937 | return cpufreq_table_find_index_dh(policy, target_freq, |
938 | efficiencies); | |
da0c6dc0 VK |
939 | } |
940 | ||
941 | /* Find closest freq to target in a table in ascending order */ | |
942 | static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, | |
1f39fa0d VD |
943 | unsigned int target_freq, |
944 | bool efficiencies) | |
da0c6dc0 VK |
945 | { |
946 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 947 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 948 | unsigned int freq; |
ffd81dcf | 949 | int idx, best = -1; |
da0c6dc0 | 950 | |
1f39fa0d | 951 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
899bb664 | 952 | freq = pos->frequency; |
da0c6dc0 VK |
953 | |
954 | if (freq == target_freq) | |
ffd81dcf | 955 | return idx; |
da0c6dc0 VK |
956 | |
957 | if (freq < target_freq) { | |
ffd81dcf | 958 | best = idx; |
da0c6dc0 VK |
959 | continue; |
960 | } | |
961 | ||
962 | /* No freq found below target_freq */ | |
ffd81dcf DB |
963 | if (best == -1) |
964 | return idx; | |
da0c6dc0 VK |
965 | |
966 | /* Choose the closest freq */ | |
ffd81dcf DB |
967 | if (target_freq - table[best].frequency > freq - target_freq) |
968 | return idx; | |
da0c6dc0 | 969 | |
ffd81dcf | 970 | return best; |
da0c6dc0 VK |
971 | } |
972 | ||
ffd81dcf | 973 | return best; |
da0c6dc0 VK |
974 | } |
975 | ||
976 | /* Find closest freq to target in a table in descending order */ | |
977 | static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, | |
1f39fa0d VD |
978 | unsigned int target_freq, |
979 | bool efficiencies) | |
da0c6dc0 VK |
980 | { |
981 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 982 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 983 | unsigned int freq; |
ffd81dcf | 984 | int idx, best = -1; |
da0c6dc0 | 985 | |
1f39fa0d | 986 | cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) { |
899bb664 | 987 | freq = pos->frequency; |
da0c6dc0 VK |
988 | |
989 | if (freq == target_freq) | |
ffd81dcf | 990 | return idx; |
da0c6dc0 VK |
991 | |
992 | if (freq > target_freq) { | |
ffd81dcf | 993 | best = idx; |
da0c6dc0 VK |
994 | continue; |
995 | } | |
996 | ||
997 | /* No freq found above target_freq */ | |
ffd81dcf DB |
998 | if (best == -1) |
999 | return idx; | |
da0c6dc0 VK |
1000 | |
1001 | /* Choose the closest freq */ | |
ffd81dcf DB |
1002 | if (table[best].frequency - target_freq > target_freq - freq) |
1003 | return idx; | |
da0c6dc0 | 1004 | |
ffd81dcf | 1005 | return best; |
da0c6dc0 VK |
1006 | } |
1007 | ||
ffd81dcf | 1008 | return best; |
da0c6dc0 VK |
1009 | } |
1010 | ||
1011 | /* Works only on sorted freq-tables */ | |
1012 | static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, | |
1f39fa0d VD |
1013 | unsigned int target_freq, |
1014 | bool efficiencies) | |
da0c6dc0 VK |
1015 | { |
1016 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
1017 | ||
1018 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
1f39fa0d VD |
1019 | return cpufreq_table_find_index_ac(policy, target_freq, |
1020 | efficiencies); | |
da0c6dc0 | 1021 | else |
1f39fa0d VD |
1022 | return cpufreq_table_find_index_dc(policy, target_freq, |
1023 | efficiencies); | |
da0c6dc0 VK |
1024 | } |
1025 | ||
1026 | static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
1027 | unsigned int target_freq, | |
1028 | unsigned int relation) | |
1029 | { | |
1f39fa0d VD |
1030 | bool efficiencies = policy->efficiencies_available && |
1031 | (relation & CPUFREQ_RELATION_E); | |
1032 | int idx; | |
1033 | ||
1034 | /* cpufreq_table_index_unsorted() has no use for this flag anyway */ | |
1035 | relation &= ~CPUFREQ_RELATION_E; | |
1036 | ||
da0c6dc0 VK |
1037 | if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) |
1038 | return cpufreq_table_index_unsorted(policy, target_freq, | |
1039 | relation); | |
1f39fa0d | 1040 | retry: |
da0c6dc0 VK |
1041 | switch (relation) { |
1042 | case CPUFREQ_RELATION_L: | |
1f39fa0d VD |
1043 | idx = cpufreq_table_find_index_l(policy, target_freq, |
1044 | efficiencies); | |
1045 | break; | |
da0c6dc0 | 1046 | case CPUFREQ_RELATION_H: |
1f39fa0d VD |
1047 | idx = cpufreq_table_find_index_h(policy, target_freq, |
1048 | efficiencies); | |
1049 | break; | |
da0c6dc0 | 1050 | case CPUFREQ_RELATION_C: |
1f39fa0d VD |
1051 | idx = cpufreq_table_find_index_c(policy, target_freq, |
1052 | efficiencies); | |
1053 | break; | |
da0c6dc0 | 1054 | default: |
30b8e6b2 VK |
1055 | WARN_ON_ONCE(1); |
1056 | return 0; | |
da0c6dc0 | 1057 | } |
1f39fa0d VD |
1058 | |
1059 | if (idx < 0 && efficiencies) { | |
1060 | efficiencies = false; | |
1061 | goto retry; | |
1062 | } | |
1063 | ||
1064 | return idx; | |
da0c6dc0 | 1065 | } |
55d85293 VK |
1066 | |
1067 | static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy) | |
1068 | { | |
1069 | struct cpufreq_frequency_table *pos; | |
1070 | int count = 0; | |
1071 | ||
1072 | if (unlikely(!policy->freq_table)) | |
1073 | return 0; | |
1074 | ||
1075 | cpufreq_for_each_valid_entry(pos, policy->freq_table) | |
1076 | count++; | |
1077 | ||
1078 | return count; | |
1079 | } | |
8486a32d | 1080 | |
442d24a5 VD |
1081 | /** |
1082 | * cpufreq_table_set_inefficient() - Mark a frequency as inefficient | |
1083 | * @policy: the &struct cpufreq_policy containing the inefficient frequency | |
1084 | * @frequency: the inefficient frequency | |
1085 | * | |
1086 | * The &struct cpufreq_policy must use a sorted frequency table | |
1087 | * | |
1088 | * Return: %0 on success or a negative errno code | |
1089 | */ | |
1090 | ||
1091 | static inline int | |
1092 | cpufreq_table_set_inefficient(struct cpufreq_policy *policy, | |
1093 | unsigned int frequency) | |
1094 | { | |
1095 | struct cpufreq_frequency_table *pos; | |
1096 | ||
1097 | /* Not supported */ | |
1098 | if (policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | cpufreq_for_each_valid_entry(pos, policy->freq_table) { | |
1102 | if (pos->frequency == frequency) { | |
1103 | pos->flags |= CPUFREQ_INEFFICIENT_FREQ; | |
1f39fa0d | 1104 | policy->efficiencies_available = true; |
442d24a5 VD |
1105 | return 0; |
1106 | } | |
1107 | } | |
1108 | ||
1109 | return -EINVAL; | |
1110 | } | |
1111 | ||
8486a32d | 1112 | static inline int parse_perf_domain(int cpu, const char *list_name, |
d182dc6d HM |
1113 | const char *cell_name, |
1114 | struct of_phandle_args *args) | |
8486a32d HY |
1115 | { |
1116 | struct device_node *cpu_np; | |
8486a32d HY |
1117 | int ret; |
1118 | ||
1119 | cpu_np = of_cpu_device_node_get(cpu); | |
1120 | if (!cpu_np) | |
1121 | return -ENODEV; | |
1122 | ||
1123 | ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0, | |
d182dc6d | 1124 | args); |
8486a32d HY |
1125 | if (ret < 0) |
1126 | return ret; | |
1127 | ||
1128 | of_node_put(cpu_np); | |
1129 | ||
d182dc6d | 1130 | return 0; |
8486a32d HY |
1131 | } |
1132 | ||
1133 | static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name, | |
d182dc6d HM |
1134 | const char *cell_name, struct cpumask *cpumask, |
1135 | struct of_phandle_args *pargs) | |
8486a32d | 1136 | { |
8486a32d | 1137 | int cpu, ret; |
d182dc6d | 1138 | struct of_phandle_args args; |
8486a32d | 1139 | |
d182dc6d | 1140 | ret = parse_perf_domain(pcpu, list_name, cell_name, pargs); |
8486a32d HY |
1141 | if (ret < 0) |
1142 | return ret; | |
1143 | ||
8486a32d HY |
1144 | cpumask_set_cpu(pcpu, cpumask); |
1145 | ||
1146 | for_each_possible_cpu(cpu) { | |
1147 | if (cpu == pcpu) | |
1148 | continue; | |
1149 | ||
d182dc6d | 1150 | ret = parse_perf_domain(cpu, list_name, cell_name, &args); |
8486a32d HY |
1151 | if (ret < 0) |
1152 | continue; | |
1153 | ||
d182dc6d HM |
1154 | if (pargs->np == args.np && pargs->args_count == args.args_count && |
1155 | !memcmp(pargs->args, args.args, sizeof(args.args[0]) * args.args_count)) | |
8486a32d | 1156 | cpumask_set_cpu(cpu, cpumask); |
d182dc6d HM |
1157 | |
1158 | of_node_put(args.np); | |
8486a32d HY |
1159 | } |
1160 | ||
d182dc6d | 1161 | return 0; |
8486a32d | 1162 | } |
6f19efc0 LM |
1163 | #else |
1164 | static inline int cpufreq_boost_trigger_state(int state) | |
1165 | { | |
1166 | return 0; | |
1167 | } | |
6f19efc0 LM |
1168 | static inline int cpufreq_boost_enabled(void) |
1169 | { | |
1170 | return 0; | |
1171 | } | |
44139ed4 VK |
1172 | |
1173 | static inline int cpufreq_enable_boost_support(void) | |
1174 | { | |
1175 | return -EINVAL; | |
1176 | } | |
1177 | ||
1178 | static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) | |
1179 | { | |
1180 | return false; | |
1181 | } | |
8486a32d | 1182 | |
442d24a5 VD |
1183 | static inline int |
1184 | cpufreq_table_set_inefficient(struct cpufreq_policy *policy, | |
1185 | unsigned int frequency) | |
1186 | { | |
1187 | return -EINVAL; | |
1188 | } | |
1189 | ||
8486a32d | 1190 | static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name, |
d182dc6d HM |
1191 | const char *cell_name, struct cpumask *cpumask, |
1192 | struct of_phandle_args *pargs) | |
8486a32d HY |
1193 | { |
1194 | return -EOPNOTSUPP; | |
1195 | } | |
6f19efc0 | 1196 | #endif |
1da177e4 | 1197 | |
531b5c9f QP |
1198 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
1199 | void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
1200 | struct cpufreq_governor *old_gov); | |
1201 | #else | |
1202 | static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
1203 | struct cpufreq_governor *old_gov) { } | |
1204 | #endif | |
1205 | ||
f8475cef LB |
1206 | extern unsigned int arch_freq_get_on_cpu(int cpu); |
1207 | ||
a20b7053 IV |
1208 | #ifndef arch_set_freq_scale |
1209 | static __always_inline | |
1210 | void arch_set_freq_scale(const struct cpumask *cpus, | |
1211 | unsigned long cur_freq, | |
1212 | unsigned long max_freq) | |
1213 | { | |
1214 | } | |
1215 | #endif | |
1da177e4 LT |
1216 | /* the following are really really optional */ |
1217 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
21c36d35 | 1218 | extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; |
18434512 | 1219 | extern struct freq_attr *cpufreq_generic_attr[]; |
d417e069 | 1220 | int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy); |
f4fd3797 | 1221 | |
652ed95d | 1222 | unsigned int cpufreq_generic_get(unsigned int cpu); |
c4dcc8a1 | 1223 | void cpufreq_generic_init(struct cpufreq_policy *policy, |
70e9e778 VK |
1224 | struct cpufreq_frequency_table *table, |
1225 | unsigned int transition_latency); | |
c17495b0 VK |
1226 | |
1227 | static inline void cpufreq_register_em_with_opp(struct cpufreq_policy *policy) | |
1228 | { | |
1229 | dev_pm_opp_of_register_em(get_cpu_device(policy->cpu), | |
1230 | policy->related_cpus); | |
1231 | } | |
1da177e4 | 1232 | #endif /* _LINUX_CPUFREQ_H */ |