LCOV - code coverage report
Current view: top level - include/linux - cpufreq.h (source / functions) Hit Total Coverage
Test: gcov_data_raspi2_real_modules_combined.info Lines: 50 108 46.3 %
Date: 2020-09-30 20:25:40 Functions: 7 9 77.8 %
Branches: 32 494 6.5 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0-only */
       2                 :            : /*
       3                 :            :  * linux/include/linux/cpufreq.h
       4                 :            :  *
       5                 :            :  * Copyright (C) 2001 Russell King
       6                 :            :  *           (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
       7                 :            :  */
       8                 :            : #ifndef _LINUX_CPUFREQ_H
       9                 :            : #define _LINUX_CPUFREQ_H
      10                 :            : 
      11                 :            : #include <linux/clk.h>
      12                 :            : #include <linux/cpumask.h>
      13                 :            : #include <linux/completion.h>
      14                 :            : #include <linux/kobject.h>
      15                 :            : #include <linux/notifier.h>
      16                 :            : #include <linux/pm_qos.h>
      17                 :            : #include <linux/spinlock.h>
      18                 :            : #include <linux/sysfs.h>
      19                 :            : 
      20                 :            : /*********************************************************************
      21                 :            :  *                        CPUFREQ INTERFACE                          *
      22                 :            :  *********************************************************************/
      23                 :            : /*
      24                 :            :  * Frequency values here are CPU kHz
      25                 :            :  *
      26                 :            :  * Maximum transition latency is in nanoseconds - if it's unknown,
      27                 :            :  * CPUFREQ_ETERNAL shall be used.
      28                 :            :  */
      29                 :            : 
      30                 :            : #define CPUFREQ_ETERNAL                 (-1)
      31                 :            : #define CPUFREQ_NAME_LEN                16
      32                 :            : /* Print length for names. Extra 1 space for accommodating '\n' in prints */
      33                 :            : #define CPUFREQ_NAME_PLEN               (CPUFREQ_NAME_LEN + 1)
      34                 :            : 
      35                 :            : struct cpufreq_governor;
      36                 :            : 
      37                 :            : enum cpufreq_table_sorting {
      38                 :            :         CPUFREQ_TABLE_UNSORTED,
      39                 :            :         CPUFREQ_TABLE_SORTED_ASCENDING,
      40                 :            :         CPUFREQ_TABLE_SORTED_DESCENDING
      41                 :            : };
      42                 :            : 
      43                 :            : struct cpufreq_cpuinfo {
      44                 :            :         unsigned int            max_freq;
      45                 :            :         unsigned int            min_freq;
      46                 :            : 
      47                 :            :         /* in 10^(-9) s = nanoseconds */
      48                 :            :         unsigned int            transition_latency;
      49                 :            : };
      50                 :            : 
      51                 :            : struct cpufreq_policy {
      52                 :            :         /* CPUs sharing clock, require sw coordination */
      53                 :            :         cpumask_var_t           cpus;   /* Online CPUs only */
      54                 :            :         cpumask_var_t           related_cpus; /* Online + Offline CPUs */
      55                 :            :         cpumask_var_t           real_cpus; /* Related and present */
      56                 :            : 
      57                 :            :         unsigned int            shared_type; /* ACPI: ANY or ALL affected CPUs
      58                 :            :                                                 should set cpufreq */
      59                 :            :         unsigned int            cpu;    /* cpu managing this policy, must be online */
      60                 :            : 
      61                 :            :         struct clk              *clk;
      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 */
      68                 :            :         unsigned int            restore_freq; /* = policy->cur before transition */
      69                 :            :         unsigned int            suspend_freq; /* freq to set during suspend */
      70                 :            : 
      71                 :            :         unsigned int            policy; /* see above */
      72                 :            :         unsigned int            last_policy; /* policy before unplug */
      73                 :            :         struct cpufreq_governor *governor; /* see below */
      74                 :            :         void                    *governor_data;
      75                 :            :         char                    last_governor[CPUFREQ_NAME_LEN]; /* last governor used */
      76                 :            : 
      77                 :            :         struct work_struct      update; /* if update_policy() needs to be
      78                 :            :                                          * called, but you're in IRQ context */
      79                 :            : 
      80                 :            :         struct freq_constraints constraints;
      81                 :            :         struct freq_qos_request *min_freq_req;
      82                 :            :         struct freq_qos_request *max_freq_req;
      83                 :            : 
      84                 :            :         struct cpufreq_frequency_table  *freq_table;
      85                 :            :         enum cpufreq_table_sorting freq_table_sorted;
      86                 :            : 
      87                 :            :         struct list_head        policy_list;
      88                 :            :         struct kobject          kobj;
      89                 :            :         struct completion       kobj_unregister;
      90                 :            : 
      91                 :            :         /*
      92                 :            :          * The rules for this semaphore:
      93                 :            :          * - Any routine that wants to read from the policy structure will
      94                 :            :          *   do a down_read on this semaphore.
      95                 :            :          * - Any routine that will write to the policy structure and/or may take away
      96                 :            :          *   the policy altogether (eg. CPU hotplug), will hold this lock in write
      97                 :            :          *   mode before doing so.
      98                 :            :          */
      99                 :            :         struct rw_semaphore     rwsem;
     100                 :            : 
     101                 :            :         /*
     102                 :            :          * Fast switch flags:
     103                 :            :          * - fast_switch_possible should be set by the driver if it can
     104                 :            :          *   guarantee that frequency can be changed on any CPU sharing the
     105                 :            :          *   policy and that the change will affect all of the policy CPUs then.
     106                 :            :          * - fast_switch_enabled is to be set by governors that support fast
     107                 :            :          *   frequency switching with the help of cpufreq_enable_fast_switch().
     108                 :            :          */
     109                 :            :         bool                    fast_switch_possible;
     110                 :            :         bool                    fast_switch_enabled;
     111                 :            : 
     112                 :            :         /*
     113                 :            :          * Preferred average time interval between consecutive invocations of
     114                 :            :          * the driver to set the frequency for this policy.  To be set by the
     115                 :            :          * scaling driver (0, which is the default, means no preference).
     116                 :            :          */
     117                 :            :         unsigned int            transition_delay_us;
     118                 :            : 
     119                 :            :         /*
     120                 :            :          * Remote DVFS flag (Not added to the driver structure as we don't want
     121                 :            :          * to access another structure from scheduler hotpath).
     122                 :            :          *
     123                 :            :          * Should be set if CPUs can do DVFS on behalf of other CPUs from
     124                 :            :          * different cpufreq policies.
     125                 :            :          */
     126                 :            :         bool                    dvfs_possible_from_any_cpu;
     127                 :            : 
     128                 :            :          /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
     129                 :            :         unsigned int cached_target_freq;
     130                 :            :         int cached_resolved_idx;
     131                 :            : 
     132                 :            :         /* Synchronization for frequency transitions */
     133                 :            :         bool                    transition_ongoing; /* Tracks transition status */
     134                 :            :         spinlock_t              transition_lock;
     135                 :            :         wait_queue_head_t       transition_wait;
     136                 :            :         struct task_struct      *transition_task; /* Task which is doing the transition */
     137                 :            : 
     138                 :            :         /* cpufreq-stats */
     139                 :            :         struct cpufreq_stats    *stats;
     140                 :            : 
     141                 :            :         /* For cpufreq driver's internal use */
     142                 :            :         void                    *driver_data;
     143                 :            : 
     144                 :            :         /* Pointer to the cooling device if used for thermal mitigation */
     145                 :            :         struct thermal_cooling_device *cdev;
     146                 :            : 
     147                 :            :         struct notifier_block nb_min;
     148                 :            :         struct notifier_block nb_max;
     149                 :            : };
     150                 :            : 
     151                 :            : /*
     152                 :            :  * Used for passing new cpufreq policy data to the cpufreq driver's ->verify()
     153                 :            :  * callback for sanitization.  That callback is only expected to modify the min
     154                 :            :  * and max values, if necessary, and specifically it must not update the
     155                 :            :  * frequency table.
     156                 :            :  */
     157                 :            : struct cpufreq_policy_data {
     158                 :            :         struct cpufreq_cpuinfo          cpuinfo;
     159                 :            :         struct cpufreq_frequency_table  *freq_table;
     160                 :            :         unsigned int                    cpu;
     161                 :            :         unsigned int                    min;    /* in kHz */
     162                 :            :         unsigned int                    max;    /* in kHz */
     163                 :            : };
     164                 :            : 
     165                 :            : struct cpufreq_freqs {
     166                 :            :         struct cpufreq_policy *policy;
     167                 :            :         unsigned int old;
     168                 :            :         unsigned int new;
     169                 :            :         u8 flags;               /* flags of cpufreq_driver, see below. */
     170                 :            : };
     171                 :            : 
     172                 :            : /* Only for ACPI */
     173                 :            : #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
     174                 :            : #define CPUFREQ_SHARED_TYPE_HW   (1) /* HW does needed coordination */
     175                 :            : #define CPUFREQ_SHARED_TYPE_ALL  (2) /* All dependent CPUs should set freq */
     176                 :            : #define CPUFREQ_SHARED_TYPE_ANY  (3) /* Freq can be set from any dependent CPU*/
     177                 :            : 
     178                 :            : #ifdef CONFIG_CPU_FREQ
     179                 :            : struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
     180                 :            : struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
     181                 :            : void cpufreq_cpu_put(struct cpufreq_policy *policy);
     182                 :            : #else
     183                 :            : static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu)
     184                 :            : {
     185                 :            :         return NULL;
     186                 :            : }
     187                 :            : static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
     188                 :            : {
     189                 :            :         return NULL;
     190                 :            : }
     191                 :            : static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
     192                 :            : #endif
     193                 :            : 
     194                 :            : static inline bool policy_is_inactive(struct cpufreq_policy *policy)
     195                 :            : {
     196                 :            :         return cpumask_empty(policy->cpus);
     197                 :            : }
     198                 :            : 
     199                 :            : static inline bool policy_is_shared(struct cpufreq_policy *policy)
     200                 :            : {
     201                 :        207 :         return cpumask_weight(policy->cpus) > 1;
     202                 :            : }
     203                 :            : 
     204                 :            : /* /sys/devices/system/cpu/cpufreq: entry point for global variables */
     205                 :            : extern struct kobject *cpufreq_global_kobject;
     206                 :            : 
     207                 :            : #ifdef CONFIG_CPU_FREQ
     208                 :            : unsigned int cpufreq_get(unsigned int cpu);
     209                 :            : unsigned int cpufreq_quick_get(unsigned int cpu);
     210                 :            : unsigned int cpufreq_quick_get_max(unsigned int cpu);
     211                 :            : void disable_cpufreq(void);
     212                 :            : 
     213                 :            : u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
     214                 :            : 
     215                 :            : struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu);
     216                 :            : void cpufreq_cpu_release(struct cpufreq_policy *policy);
     217                 :            : int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
     218                 :            : void refresh_frequency_limits(struct cpufreq_policy *policy);
     219                 :            : void cpufreq_update_policy(unsigned int cpu);
     220                 :            : void cpufreq_update_limits(unsigned int cpu);
     221                 :            : bool have_governor_per_policy(void);
     222                 :            : struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
     223                 :            : void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
     224                 :            : void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
     225                 :            : #else
     226                 :            : static inline unsigned int cpufreq_get(unsigned int cpu)
     227                 :            : {
     228                 :            :         return 0;
     229                 :            : }
     230                 :            : static inline unsigned int cpufreq_quick_get(unsigned int cpu)
     231                 :            : {
     232                 :            :         return 0;
     233                 :            : }
     234                 :            : static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
     235                 :            : {
     236                 :            :         return 0;
     237                 :            : }
     238                 :            : static inline void disable_cpufreq(void) { }
     239                 :            : #endif
     240                 :            : 
     241                 :            : #ifdef CONFIG_CPU_FREQ_STAT
     242                 :            : void cpufreq_stats_create_table(struct cpufreq_policy *policy);
     243                 :            : void cpufreq_stats_free_table(struct cpufreq_policy *policy);
     244                 :            : void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
     245                 :            :                                      unsigned int new_freq);
     246                 :            : #else
     247                 :            : static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { }
     248                 :            : static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { }
     249                 :            : static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
     250                 :            :                                                    unsigned int new_freq) { }
     251                 :            : #endif /* CONFIG_CPU_FREQ_STAT */
     252                 :            : 
     253                 :            : /*********************************************************************
     254                 :            :  *                      CPUFREQ DRIVER INTERFACE                     *
     255                 :            :  *********************************************************************/
     256                 :            : 
     257                 :            : #define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
     258                 :            : #define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
     259                 :            : #define CPUFREQ_RELATION_C 2  /* closest frequency to target */
     260                 :            : 
     261                 :            : struct freq_attr {
     262                 :            :         struct attribute attr;
     263                 :            :         ssize_t (*show)(struct cpufreq_policy *, char *);
     264                 :            :         ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
     265                 :            : };
     266                 :            : 
     267                 :            : #define cpufreq_freq_attr_ro(_name)             \
     268                 :            : static struct freq_attr _name =                 \
     269                 :            : __ATTR(_name, 0444, show_##_name, NULL)
     270                 :            : 
     271                 :            : #define cpufreq_freq_attr_ro_perm(_name, _perm) \
     272                 :            : static struct freq_attr _name =                 \
     273                 :            : __ATTR(_name, _perm, show_##_name, NULL)
     274                 :            : 
     275                 :            : #define cpufreq_freq_attr_rw(_name)             \
     276                 :            : static struct freq_attr _name =                 \
     277                 :            : __ATTR(_name, 0644, show_##_name, store_##_name)
     278                 :            : 
     279                 :            : #define cpufreq_freq_attr_wo(_name)             \
     280                 :            : static struct freq_attr _name =                 \
     281                 :            : __ATTR(_name, 0200, NULL, store_##_name)
     282                 :            : 
     283                 :            : #define define_one_global_ro(_name)             \
     284                 :            : static struct kobj_attribute _name =            \
     285                 :            : __ATTR(_name, 0444, show_##_name, NULL)
     286                 :            : 
     287                 :            : #define define_one_global_rw(_name)             \
     288                 :            : static struct kobj_attribute _name =            \
     289                 :            : __ATTR(_name, 0644, show_##_name, store_##_name)
     290                 :            : 
     291                 :            : 
     292                 :            : struct cpufreq_driver {
     293                 :            :         char            name[CPUFREQ_NAME_LEN];
     294                 :            :         u8              flags;
     295                 :            :         void            *driver_data;
     296                 :            : 
     297                 :            :         /* needed by all drivers */
     298                 :            :         int             (*init)(struct cpufreq_policy *policy);
     299                 :            :         int             (*verify)(struct cpufreq_policy_data *policy);
     300                 :            : 
     301                 :            :         /* define one out of two */
     302                 :            :         int             (*setpolicy)(struct cpufreq_policy *policy);
     303                 :            : 
     304                 :            :         /*
     305                 :            :          * On failure, should always restore frequency to policy->restore_freq
     306                 :            :          * (i.e. old freq).
     307                 :            :          */
     308                 :            :         int             (*target)(struct cpufreq_policy *policy,
     309                 :            :                                   unsigned int target_freq,
     310                 :            :                                   unsigned int relation);       /* Deprecated */
     311                 :            :         int             (*target_index)(struct cpufreq_policy *policy,
     312                 :            :                                         unsigned int index);
     313                 :            :         unsigned int    (*fast_switch)(struct cpufreq_policy *policy,
     314                 :            :                                        unsigned int target_freq);
     315                 :            : 
     316                 :            :         /*
     317                 :            :          * Caches and returns the lowest driver-supported frequency greater than
     318                 :            :          * or equal to the target frequency, subject to any driver limitations.
     319                 :            :          * Does not set the frequency. Only to be implemented for drivers with
     320                 :            :          * target().
     321                 :            :          */
     322                 :            :         unsigned int    (*resolve_freq)(struct cpufreq_policy *policy,
     323                 :            :                                         unsigned int target_freq);
     324                 :            : 
     325                 :            :         /*
     326                 :            :          * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
     327                 :            :          * unset.
     328                 :            :          *
     329                 :            :          * get_intermediate should return a stable intermediate frequency
     330                 :            :          * platform wants to switch to and target_intermediate() should set CPU
     331                 :            :          * to to that frequency, before jumping to the frequency corresponding
     332                 :            :          * to 'index'. Core will take care of sending notifications and driver
     333                 :            :          * doesn't have to handle them in target_intermediate() or
     334                 :            :          * target_index().
     335                 :            :          *
     336                 :            :          * Drivers can return '0' from get_intermediate() in case they don't
     337                 :            :          * wish to switch to intermediate frequency for some target frequency.
     338                 :            :          * In that case core will directly call ->target_index().
     339                 :            :          */
     340                 :            :         unsigned int    (*get_intermediate)(struct cpufreq_policy *policy,
     341                 :            :                                             unsigned int index);
     342                 :            :         int             (*target_intermediate)(struct cpufreq_policy *policy,
     343                 :            :                                                unsigned int index);
     344                 :            : 
     345                 :            :         /* should be defined, if possible */
     346                 :            :         unsigned int    (*get)(unsigned int cpu);
     347                 :            : 
     348                 :            :         /* Called to update policy limits on firmware notifications. */
     349                 :            :         void            (*update_limits)(unsigned int cpu);
     350                 :            : 
     351                 :            :         /* optional */
     352                 :            :         int             (*bios_limit)(int cpu, unsigned int *limit);
     353                 :            : 
     354                 :            :         int             (*online)(struct cpufreq_policy *policy);
     355                 :            :         int             (*offline)(struct cpufreq_policy *policy);
     356                 :            :         int             (*exit)(struct cpufreq_policy *policy);
     357                 :            :         void            (*stop_cpu)(struct cpufreq_policy *policy);
     358                 :            :         int             (*suspend)(struct cpufreq_policy *policy);
     359                 :            :         int             (*resume)(struct cpufreq_policy *policy);
     360                 :            : 
     361                 :            :         /* Will be called after the driver is fully initialized */
     362                 :            :         void            (*ready)(struct cpufreq_policy *policy);
     363                 :            : 
     364                 :            :         struct freq_attr **attr;
     365                 :            : 
     366                 :            :         /* platform specific boost support code */
     367                 :            :         bool            boost_enabled;
     368                 :            :         int             (*set_boost)(int state);
     369                 :            : };
     370                 :            : 
     371                 :            : /* flags */
     372                 :            : 
     373                 :            : /* driver isn't removed even if all ->init() calls failed */
     374                 :            : #define CPUFREQ_STICKY                          BIT(0)
     375                 :            : 
     376                 :            : /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
     377                 :            : #define CPUFREQ_CONST_LOOPS                     BIT(1)
     378                 :            : 
     379                 :            : /* don't warn on suspend/resume speed mismatches */
     380                 :            : #define CPUFREQ_PM_NO_WARN                      BIT(2)
     381                 :            : 
     382                 :            : /*
     383                 :            :  * This should be set by platforms having multiple clock-domains, i.e.
     384                 :            :  * supporting multiple policies. With this sysfs directories of governor would
     385                 :            :  * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
     386                 :            :  * governor with different tunables for different clusters.
     387                 :            :  */
     388                 :            : #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY        BIT(3)
     389                 :            : 
     390                 :            : /*
     391                 :            :  * Driver will do POSTCHANGE notifications from outside of their ->target()
     392                 :            :  * routine and so must set cpufreq_driver->flags with this flag, so that core
     393                 :            :  * can handle them specially.
     394                 :            :  */
     395                 :            : #define CPUFREQ_ASYNC_NOTIFICATION              BIT(4)
     396                 :            : 
     397                 :            : /*
     398                 :            :  * Set by drivers which want cpufreq core to check if CPU is running at a
     399                 :            :  * frequency present in freq-table exposed by the driver. For these drivers if
     400                 :            :  * CPU is found running at an out of table freq, we will try to set it to a freq
     401                 :            :  * from the table. And if that fails, we will stop further boot process by
     402                 :            :  * issuing a BUG_ON().
     403                 :            :  */
     404                 :            : #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
     405                 :            : 
     406                 :            : /*
     407                 :            :  * Set by drivers to disallow use of governors with "dynamic_switching" flag
     408                 :            :  * set.
     409                 :            :  */
     410                 :            : #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING       BIT(6)
     411                 :            : 
     412                 :            : /*
     413                 :            :  * Set by drivers that want the core to automatically register the cpufreq
     414                 :            :  * driver as a thermal cooling device.
     415                 :            :  */
     416                 :            : #define CPUFREQ_IS_COOLING_DEV                  BIT(7)
     417                 :            : 
     418                 :            : int cpufreq_register_driver(struct cpufreq_driver *driver_data);
     419                 :            : int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
     420                 :            : 
     421                 :            : const char *cpufreq_get_current_driver(void);
     422                 :            : void *cpufreq_get_driver_data(void);
     423                 :            : 
     424                 :            : static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv)
     425                 :            : {
     426                 :            :         return IS_ENABLED(CONFIG_CPU_THERMAL) &&
     427                 :            :                 (drv->flags & CPUFREQ_IS_COOLING_DEV);
     428                 :            : }
     429                 :            : 
     430                 :        828 : static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy,
     431                 :            :                                                 unsigned int min,
     432                 :            :                                                 unsigned int max)
     433                 :            : {
     434         [ -  + ]:        828 :         if (policy->min < min)
     435                 :          0 :                 policy->min = min;
     436         [ -  + ]:        828 :         if (policy->max < min)
     437                 :          0 :                 policy->max = min;
     438         [ -  + ]:        828 :         if (policy->min > max)
     439                 :          0 :                 policy->min = max;
     440         [ -  + ]:        828 :         if (policy->max > max)
     441                 :          0 :                 policy->max = max;
     442         [ -  + ]:        828 :         if (policy->min > policy->max)
     443                 :          0 :                 policy->min = policy->max;
     444                 :        828 :         return;
     445                 :            : }
     446                 :            : 
     447                 :            : static inline void
     448                 :            : cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy)
     449                 :            : {
     450                 :        828 :         cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
     451                 :            :                                      policy->cpuinfo.max_freq);
     452                 :            : }
     453                 :            : 
     454                 :            : #ifdef CONFIG_CPU_FREQ
     455                 :            : void cpufreq_suspend(void);
     456                 :            : void cpufreq_resume(void);
     457                 :            : int cpufreq_generic_suspend(struct cpufreq_policy *policy);
     458                 :            : #else
     459                 :            : static inline void cpufreq_suspend(void) {}
     460                 :            : static inline void cpufreq_resume(void) {}
     461                 :            : #endif
     462                 :            : 
     463                 :            : /*********************************************************************
     464                 :            :  *                     CPUFREQ NOTIFIER INTERFACE                    *
     465                 :            :  *********************************************************************/
     466                 :            : 
     467                 :            : #define CPUFREQ_TRANSITION_NOTIFIER     (0)
     468                 :            : #define CPUFREQ_POLICY_NOTIFIER         (1)
     469                 :            : 
     470                 :            : /* Transition notifiers */
     471                 :            : #define CPUFREQ_PRECHANGE               (0)
     472                 :            : #define CPUFREQ_POSTCHANGE              (1)
     473                 :            : 
     474                 :            : /* Policy Notifiers  */
     475                 :            : #define CPUFREQ_CREATE_POLICY           (0)
     476                 :            : #define CPUFREQ_REMOVE_POLICY           (1)
     477                 :            : 
     478                 :            : #ifdef CONFIG_CPU_FREQ
     479                 :            : int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
     480                 :            : int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
     481                 :            : 
     482                 :            : void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
     483                 :            :                 struct cpufreq_freqs *freqs);
     484                 :            : void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
     485                 :            :                 struct cpufreq_freqs *freqs, int transition_failed);
     486                 :            : 
     487                 :            : #else /* CONFIG_CPU_FREQ */
     488                 :            : static inline int cpufreq_register_notifier(struct notifier_block *nb,
     489                 :            :                                                 unsigned int list)
     490                 :            : {
     491                 :            :         return 0;
     492                 :            : }
     493                 :            : static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
     494                 :            :                                                 unsigned int list)
     495                 :            : {
     496                 :            :         return 0;
     497                 :            : }
     498                 :            : #endif /* !CONFIG_CPU_FREQ */
     499                 :            : 
     500                 :            : /**
     501                 :            :  * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
     502                 :            :  * safe)
     503                 :            :  * @old:   old value
     504                 :            :  * @div:   divisor
     505                 :            :  * @mult:  multiplier
     506                 :            :  *
     507                 :            :  *
     508                 :            :  * new = old * mult / div
     509                 :            :  */
     510                 :      44202 : static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
     511                 :            :                 u_int mult)
     512                 :            : {
     513                 :            : #if BITS_PER_LONG == 32
     514                 :      44202 :         u64 result = ((u64) old) * ((u64) mult);
     515   [ -  +  #  #  :      44202 :         do_div(result, div);
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                   -  + ]
     516                 :      44202 :         return (unsigned long) result;
     517                 :            : 
     518                 :            : #elif BITS_PER_LONG == 64
     519                 :            :         unsigned long result = old * ((u64) mult);
     520                 :            :         result /= div;
     521                 :            :         return result;
     522                 :            : #endif
     523                 :            : }
     524                 :            : 
     525                 :            : /*********************************************************************
     526                 :            :  *                          CPUFREQ GOVERNORS                        *
     527                 :            :  *********************************************************************/
     528                 :            : 
     529                 :            : #define CPUFREQ_POLICY_UNKNOWN          (0)
     530                 :            : /*
     531                 :            :  * If (cpufreq_driver->target) exists, the ->governor decides what frequency
     532                 :            :  * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
     533                 :            :  * two generic policies are available:
     534                 :            :  */
     535                 :            : #define CPUFREQ_POLICY_POWERSAVE        (1)
     536                 :            : #define CPUFREQ_POLICY_PERFORMANCE      (2)
     537                 :            : 
     538                 :            : /*
     539                 :            :  * The polling frequency depends on the capability of the processor. Default
     540                 :            :  * polling frequency is 1000 times the transition latency of the processor. The
     541                 :            :  * ondemand governor will work on any processor with transition latency <= 10ms,
     542                 :            :  * using appropriate sampling rate.
     543                 :            :  */
     544                 :            : #define LATENCY_MULTIPLIER              (1000)
     545                 :            : 
     546                 :            : struct cpufreq_governor {
     547                 :            :         char    name[CPUFREQ_NAME_LEN];
     548                 :            :         int     (*init)(struct cpufreq_policy *policy);
     549                 :            :         void    (*exit)(struct cpufreq_policy *policy);
     550                 :            :         int     (*start)(struct cpufreq_policy *policy);
     551                 :            :         void    (*stop)(struct cpufreq_policy *policy);
     552                 :            :         void    (*limits)(struct cpufreq_policy *policy);
     553                 :            :         ssize_t (*show_setspeed)        (struct cpufreq_policy *policy,
     554                 :            :                                          char *buf);
     555                 :            :         int     (*store_setspeed)       (struct cpufreq_policy *policy,
     556                 :            :                                          unsigned int freq);
     557                 :            :         /* For governors which change frequency dynamically by themselves */
     558                 :            :         bool                    dynamic_switching;
     559                 :            :         struct list_head        governor_list;
     560                 :            :         struct module           *owner;
     561                 :            : };
     562                 :            : 
     563                 :            : /* Pass a target to the cpufreq driver */
     564                 :            : unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
     565                 :            :                                         unsigned int target_freq);
     566                 :            : int cpufreq_driver_target(struct cpufreq_policy *policy,
     567                 :            :                                  unsigned int target_freq,
     568                 :            :                                  unsigned int relation);
     569                 :            : int __cpufreq_driver_target(struct cpufreq_policy *policy,
     570                 :            :                                    unsigned int target_freq,
     571                 :            :                                    unsigned int relation);
     572                 :            : unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
     573                 :            :                                          unsigned int target_freq);
     574                 :            : unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
     575                 :            : int cpufreq_register_governor(struct cpufreq_governor *governor);
     576                 :            : void cpufreq_unregister_governor(struct cpufreq_governor *governor);
     577                 :            : 
     578                 :            : struct cpufreq_governor *cpufreq_default_governor(void);
     579                 :            : struct cpufreq_governor *cpufreq_fallback_governor(void);
     580                 :            : 
     581                 :        207 : static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
     582                 :            : {
     583         [ -  + ]:        207 :         if (policy->max < policy->cur)
     584                 :          0 :                 __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
     585         [ -  + ]:        207 :         else if (policy->min > policy->cur)
     586                 :          0 :                 __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
     587                 :        207 : }
     588                 :            : 
     589                 :            : /* Governor attribute set */
     590                 :            : struct gov_attr_set {
     591                 :            :         struct kobject kobj;
     592                 :            :         struct list_head policy_list;
     593                 :            :         struct mutex update_lock;
     594                 :            :         int usage_count;
     595                 :            : };
     596                 :            : 
     597                 :            : /* sysfs ops for cpufreq governors */
     598                 :            : extern const struct sysfs_ops governor_sysfs_ops;
     599                 :            : 
     600                 :            : void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node);
     601                 :            : void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node);
     602                 :            : unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node);
     603                 :            : 
     604                 :            : /* Governor sysfs attribute */
     605                 :            : struct governor_attr {
     606                 :            :         struct attribute attr;
     607                 :            :         ssize_t (*show)(struct gov_attr_set *attr_set, char *buf);
     608                 :            :         ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf,
     609                 :            :                          size_t count);
     610                 :            : };
     611                 :            : 
     612                 :            : /*********************************************************************
     613                 :            :  *                     FREQUENCY TABLE HELPERS                       *
     614                 :            :  *********************************************************************/
     615                 :            : 
     616                 :            : /* Special Values of .frequency field */
     617                 :            : #define CPUFREQ_ENTRY_INVALID   ~0u
     618                 :            : #define CPUFREQ_TABLE_END       ~1u
     619                 :            : /* Special Values of .flags field */
     620                 :            : #define CPUFREQ_BOOST_FREQ      (1 << 0)
     621                 :            : 
     622                 :            : struct cpufreq_frequency_table {
     623                 :            :         unsigned int    flags;
     624                 :            :         unsigned int    driver_data; /* driver specific data, not used by core */
     625                 :            :         unsigned int    frequency; /* kHz - doesn't need to be in ascending
     626                 :            :                                     * order */
     627                 :            : };
     628                 :            : 
     629                 :            : #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
     630                 :            : int dev_pm_opp_init_cpufreq_table(struct device *dev,
     631                 :            :                                   struct cpufreq_frequency_table **table);
     632                 :            : void dev_pm_opp_free_cpufreq_table(struct device *dev,
     633                 :            :                                    struct cpufreq_frequency_table **table);
     634                 :            : #else
     635                 :            : static inline int dev_pm_opp_init_cpufreq_table(struct device *dev,
     636                 :            :                                                 struct cpufreq_frequency_table
     637                 :            :                                                 **table)
     638                 :            : {
     639                 :            :         return -EINVAL;
     640                 :            : }
     641                 :            : 
     642                 :            : static inline void dev_pm_opp_free_cpufreq_table(struct device *dev,
     643                 :            :                                                  struct cpufreq_frequency_table
     644                 :            :                                                  **table)
     645                 :            : {
     646                 :            : }
     647                 :            : #endif
     648                 :            : 
     649                 :            : /*
     650                 :            :  * cpufreq_for_each_entry -     iterate over a cpufreq_frequency_table
     651                 :            :  * @pos:        the cpufreq_frequency_table * to use as a loop cursor.
     652                 :            :  * @table:      the cpufreq_frequency_table * to iterate over.
     653                 :            :  */
     654                 :            : 
     655                 :            : #define cpufreq_for_each_entry(pos, table)      \
     656                 :            :         for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
     657                 :            : 
     658                 :            : /*
     659                 :            :  * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
     660                 :            :  *      with index
     661                 :            :  * @pos:        the cpufreq_frequency_table * to use as a loop cursor.
     662                 :            :  * @table:      the cpufreq_frequency_table * to iterate over.
     663                 :            :  * @idx:        the table entry currently being processed
     664                 :            :  */
     665                 :            : 
     666                 :            : #define cpufreq_for_each_entry_idx(pos, table, idx)     \
     667                 :            :         for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
     668                 :            :                 pos++, idx++)
     669                 :            : 
     670                 :            : /*
     671                 :            :  * cpufreq_for_each_valid_entry -     iterate over a cpufreq_frequency_table
     672                 :            :  *      excluding CPUFREQ_ENTRY_INVALID frequencies.
     673                 :            :  * @pos:        the cpufreq_frequency_table * to use as a loop cursor.
     674                 :            :  * @table:      the cpufreq_frequency_table * to iterate over.
     675                 :            :  */
     676                 :            : 
     677                 :            : #define cpufreq_for_each_valid_entry(pos, table)                        \
     678                 :            :         for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)        \
     679                 :            :                 if (pos->frequency == CPUFREQ_ENTRY_INVALID)         \
     680                 :            :                         continue;                                       \
     681                 :            :                 else
     682                 :            : 
     683                 :            : /*
     684                 :            :  * cpufreq_for_each_valid_entry_idx -     iterate with index over a cpufreq
     685                 :            :  *      frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
     686                 :            :  * @pos:        the cpufreq_frequency_table * to use as a loop cursor.
     687                 :            :  * @table:      the cpufreq_frequency_table * to iterate over.
     688                 :            :  * @idx:        the table entry currently being processed
     689                 :            :  */
     690                 :            : 
     691                 :            : #define cpufreq_for_each_valid_entry_idx(pos, table, idx)               \
     692                 :            :         cpufreq_for_each_entry_idx(pos, table, idx)                     \
     693                 :            :                 if (pos->frequency == CPUFREQ_ENTRY_INVALID)         \
     694                 :            :                         continue;                                       \
     695                 :            :                 else
     696                 :            : 
     697                 :            : 
     698                 :            : int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
     699                 :            :                                     struct cpufreq_frequency_table *table);
     700                 :            : 
     701                 :            : int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy,
     702                 :            :                                    struct cpufreq_frequency_table *table);
     703                 :            : int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy);
     704                 :            : 
     705                 :            : int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
     706                 :            :                                  unsigned int target_freq,
     707                 :            :                                  unsigned int relation);
     708                 :            : int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
     709                 :            :                 unsigned int freq);
     710                 :            : 
     711                 :            : ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
     712                 :            : 
     713                 :            : #ifdef CONFIG_CPU_FREQ
     714                 :            : int cpufreq_boost_trigger_state(int state);
     715                 :            : int cpufreq_boost_enabled(void);
     716                 :            : int cpufreq_enable_boost_support(void);
     717                 :            : bool policy_has_boost_freq(struct cpufreq_policy *policy);
     718                 :            : 
     719                 :            : /* Find lowest freq at or above target in a table in ascending order */
     720                 :            : static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy,
     721                 :            :                                               unsigned int target_freq)
     722                 :            : {
     723                 :          0 :         struct cpufreq_frequency_table *table = policy->freq_table;
     724                 :            :         struct cpufreq_frequency_table *pos;
     725                 :            :         unsigned int freq;
     726                 :            :         int idx, best = -1;
     727                 :            : 
     728   [ #  #  #  # ]:          0 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     729                 :            :                 freq = pos->frequency;
     730                 :            : 
     731         [ #  # ]:          0 :                 if (freq >= target_freq)
     732                 :          0 :                         return idx;
     733                 :            : 
     734                 :            :                 best = idx;
     735                 :            :         }
     736                 :            : 
     737                 :          0 :         return best;
     738                 :            : }
     739                 :            : 
     740                 :            : /* Find lowest freq at or above target in a table in descending order */
     741                 :            : static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy,
     742                 :            :                                               unsigned int target_freq)
     743                 :            : {
     744                 :          0 :         struct cpufreq_frequency_table *table = policy->freq_table;
     745                 :            :         struct cpufreq_frequency_table *pos;
     746                 :            :         unsigned int freq;
     747                 :            :         int idx, best = -1;
     748                 :            : 
     749   [ #  #  #  # ]:          0 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     750                 :            :                 freq = pos->frequency;
     751                 :            : 
     752         [ #  # ]:          0 :                 if (freq == target_freq)
     753                 :          0 :                         return idx;
     754                 :            : 
     755         [ #  # ]:          0 :                 if (freq > target_freq) {
     756                 :            :                         best = idx;
     757                 :          0 :                         continue;
     758                 :            :                 }
     759                 :            : 
     760                 :            :                 /* No freq found above target_freq */
     761         [ #  # ]:          0 :                 if (best == -1)
     762                 :          0 :                         return idx;
     763                 :            : 
     764                 :          0 :                 return best;
     765                 :            :         }
     766                 :            : 
     767                 :          0 :         return best;
     768                 :            : }
     769                 :            : 
     770                 :            : /* Works only on sorted freq-tables */
     771                 :          0 : static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy,
     772                 :            :                                              unsigned int target_freq)
     773                 :            : {
     774                 :          0 :         target_freq = clamp_val(target_freq, policy->min, policy->max);
     775                 :            : 
     776         [ #  # ]:          0 :         if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
     777                 :          0 :                 return cpufreq_table_find_index_al(policy, target_freq);
     778                 :            :         else
     779                 :          0 :                 return cpufreq_table_find_index_dl(policy, target_freq);
     780                 :            : }
     781                 :            : 
     782                 :            : /* Find highest freq at or below target in a table in ascending order */
     783                 :            : static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy,
     784                 :            :                                               unsigned int target_freq)
     785                 :            : {
     786                 :       8297 :         struct cpufreq_frequency_table *table = policy->freq_table;
     787                 :            :         struct cpufreq_frequency_table *pos;
     788                 :            :         unsigned int freq;
     789                 :            :         int idx, best = -1;
     790                 :            : 
     791   [ -  +  +  - ]:      58079 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     792                 :            :                 freq = pos->frequency;
     793                 :            : 
     794         [ +  + ]:      33188 :                 if (freq == target_freq)
     795                 :       8297 :                         return idx;
     796                 :            : 
     797         [ +  - ]:      24891 :                 if (freq < target_freq) {
     798                 :            :                         best = idx;
     799                 :      24891 :                         continue;
     800                 :            :                 }
     801                 :            : 
     802                 :            :                 /* No freq found below target_freq */
     803         [ #  # ]:          0 :                 if (best == -1)
     804                 :          0 :                         return idx;
     805                 :            : 
     806                 :          0 :                 return best;
     807                 :            :         }
     808                 :            : 
     809                 :          0 :         return best;
     810                 :            : }
     811                 :            : 
     812                 :            : /* Find highest freq at or below target in a table in descending order */
     813                 :            : static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy,
     814                 :            :                                               unsigned int target_freq)
     815                 :            : {
     816                 :          0 :         struct cpufreq_frequency_table *table = policy->freq_table;
     817                 :            :         struct cpufreq_frequency_table *pos;
     818                 :            :         unsigned int freq;
     819                 :            :         int idx, best = -1;
     820                 :            : 
     821   [ #  #  #  # ]:          0 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     822                 :            :                 freq = pos->frequency;
     823                 :            : 
     824         [ #  # ]:          0 :                 if (freq <= target_freq)
     825                 :          0 :                         return idx;
     826                 :            : 
     827                 :            :                 best = idx;
     828                 :            :         }
     829                 :            : 
     830                 :          0 :         return best;
     831                 :            : }
     832                 :            : 
     833                 :            : /* Works only on sorted freq-tables */
     834                 :       8297 : static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy,
     835                 :            :                                              unsigned int target_freq)
     836                 :            : {
     837                 :       8297 :         target_freq = clamp_val(target_freq, policy->min, policy->max);
     838                 :            : 
     839         [ +  - ]:       8297 :         if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
     840                 :       8297 :                 return cpufreq_table_find_index_ah(policy, target_freq);
     841                 :            :         else
     842                 :          0 :                 return cpufreq_table_find_index_dh(policy, target_freq);
     843                 :            : }
     844                 :            : 
     845                 :            : /* Find closest freq to target in a table in ascending order */
     846                 :      98849 : static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy,
     847                 :            :                                               unsigned int target_freq)
     848                 :            : {
     849                 :      98849 :         struct cpufreq_frequency_table *table = policy->freq_table;
     850                 :            :         struct cpufreq_frequency_table *pos;
     851                 :            :         unsigned int freq;
     852                 :            :         int idx, best = -1;
     853                 :            : 
     854   [ -  +  +  - ]:     226924 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     855                 :            :                 freq = pos->frequency;
     856                 :            : 
     857         [ -  + ]:     226924 :                 if (freq == target_freq)
     858                 :          0 :                         return idx;
     859                 :            : 
     860         [ +  + ]:     226924 :                 if (freq < target_freq) {
     861                 :            :                         best = idx;
     862                 :     128075 :                         continue;
     863                 :            :                 }
     864                 :            : 
     865                 :            :                 /* No freq found below target_freq */
     866         [ -  + ]:      98849 :                 if (best == -1)
     867                 :          0 :                         return idx;
     868                 :            : 
     869                 :            :                 /* Choose the closest freq */
     870         [ +  + ]:      98849 :                 if (target_freq - table[best].frequency > freq - target_freq)
     871                 :       1943 :                         return idx;
     872                 :            : 
     873                 :      96906 :                 return best;
     874                 :            :         }
     875                 :            : 
     876                 :          0 :         return best;
     877                 :            : }
     878                 :            : 
     879                 :            : /* Find closest freq to target in a table in descending order */
     880                 :          0 : static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy,
     881                 :            :                                               unsigned int target_freq)
     882                 :            : {
     883                 :          0 :         struct cpufreq_frequency_table *table = policy->freq_table;
     884                 :            :         struct cpufreq_frequency_table *pos;
     885                 :            :         unsigned int freq;
     886                 :            :         int idx, best = -1;
     887                 :            : 
     888   [ #  #  #  # ]:          0 :         cpufreq_for_each_valid_entry_idx(pos, table, idx) {
     889                 :            :                 freq = pos->frequency;
     890                 :            : 
     891         [ #  # ]:          0 :                 if (freq == target_freq)
     892                 :          0 :                         return idx;
     893                 :            : 
     894         [ #  # ]:          0 :                 if (freq > target_freq) {
     895                 :            :                         best = idx;
     896                 :          0 :                         continue;
     897                 :            :                 }
     898                 :            : 
     899                 :            :                 /* No freq found above target_freq */
     900         [ #  # ]:          0 :                 if (best == -1)
     901                 :          0 :                         return idx;
     902                 :            : 
     903                 :            :                 /* Choose the closest freq */
     904         [ #  # ]:          0 :                 if (table[best].frequency - target_freq > target_freq - freq)
     905                 :          0 :                         return idx;
     906                 :            : 
     907                 :          0 :                 return best;
     908                 :            :         }
     909                 :            : 
     910                 :          0 :         return best;
     911                 :            : }
     912                 :            : 
     913                 :            : /* Works only on sorted freq-tables */
     914                 :      98849 : static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy,
     915                 :            :                                              unsigned int target_freq)
     916                 :            : {
     917                 :      98849 :         target_freq = clamp_val(target_freq, policy->min, policy->max);
     918                 :            : 
     919         [ +  - ]:      98849 :         if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
     920                 :      98849 :                 return cpufreq_table_find_index_ac(policy, target_freq);
     921                 :            :         else
     922                 :          0 :                 return cpufreq_table_find_index_dc(policy, target_freq);
     923                 :            : }
     924                 :            : 
     925                 :     107146 : static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
     926                 :            :                                                  unsigned int target_freq,
     927                 :            :                                                  unsigned int relation)
     928                 :            : {
     929         [ -  + ]:     107146 :         if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED))
     930                 :          0 :                 return cpufreq_table_index_unsorted(policy, target_freq,
     931                 :            :                                                     relation);
     932                 :            : 
     933   [ -  +  +  - ]:     107146 :         switch (relation) {
     934                 :            :         case CPUFREQ_RELATION_L:
     935                 :          0 :                 return cpufreq_table_find_index_l(policy, target_freq);
     936                 :            :         case CPUFREQ_RELATION_H:
     937                 :       8297 :                 return cpufreq_table_find_index_h(policy, target_freq);
     938                 :            :         case CPUFREQ_RELATION_C:
     939                 :      98849 :                 return cpufreq_table_find_index_c(policy, target_freq);
     940                 :            :         default:
     941                 :          0 :                 pr_err("%s: Invalid relation: %d\n", __func__, relation);
     942                 :          0 :                 return -EINVAL;
     943                 :            :         }
     944                 :            : }
     945                 :            : 
     946                 :            : static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy)
     947                 :            : {
     948                 :            :         struct cpufreq_frequency_table *pos;
     949                 :            :         int count = 0;
     950                 :            : 
     951         [ +  - ]:        207 :         if (unlikely(!policy->freq_table))
     952                 :            :                 return 0;
     953                 :            : 
     954   [ -  +  +  + ]:       1656 :         cpufreq_for_each_valid_entry(pos, policy->freq_table)
     955                 :        828 :                 count++;
     956                 :            : 
     957                 :        207 :         return count;
     958                 :            : }
     959                 :            : #else
     960                 :            : static inline int cpufreq_boost_trigger_state(int state)
     961                 :            : {
     962                 :            :         return 0;
     963                 :            : }
     964                 :            : static inline int cpufreq_boost_enabled(void)
     965                 :            : {
     966                 :            :         return 0;
     967                 :            : }
     968                 :            : 
     969                 :            : static inline int cpufreq_enable_boost_support(void)
     970                 :            : {
     971                 :            :         return -EINVAL;
     972                 :            : }
     973                 :            : 
     974                 :            : static inline bool policy_has_boost_freq(struct cpufreq_policy *policy)
     975                 :            : {
     976                 :            :         return false;
     977                 :            : }
     978                 :            : #endif
     979                 :            : 
     980                 :            : #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
     981                 :            : void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
     982                 :            :                         struct cpufreq_governor *old_gov);
     983                 :            : #else
     984                 :            : static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
     985                 :            :                         struct cpufreq_governor *old_gov) { }
     986                 :            : #endif
     987                 :            : 
     988                 :            : extern void arch_freq_prepare_all(void);
     989                 :            : extern unsigned int arch_freq_get_on_cpu(int cpu);
     990                 :            : 
     991                 :            : extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
     992                 :            :                                 unsigned long max_freq);
     993                 :            : 
     994                 :            : /* the following are really really optional */
     995                 :            : extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
     996                 :            : extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;
     997                 :            : extern struct freq_attr *cpufreq_generic_attr[];
     998                 :            : int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy);
     999                 :            : 
    1000                 :            : unsigned int cpufreq_generic_get(unsigned int cpu);
    1001                 :            : void cpufreq_generic_init(struct cpufreq_policy *policy,
    1002                 :            :                 struct cpufreq_frequency_table *table,
    1003                 :            :                 unsigned int transition_latency);
    1004                 :            : #endif /* _LINUX_CPUFREQ_H */

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