/*
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* drivers/cpufreq/autohotplug.h
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*
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* Copyright (C) 2016-2020 Allwinnertech.
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* East Yang <yangdong@allwinnertech.com>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __AUTOHOTPLUG__
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#define __AUTOHOTPLUG__
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#define INVALID_LOAD 0xffffffff
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#define INVALID_CPU 0xffffffff
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#define STABLE_DOWN 0
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#define STABLE_UP 1
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#define STABLE_BOOST 2
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#define STABLE_LAST_BIG 3
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#if defined(CONFIG_SCHED_HMP)
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#define AUTOHOTPLUG_SUNXI_SYSFS_MAX (7)
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#elif defined(CONFIG_SCHED_SMP_DCMP)
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#define AUTOHOTPLUG_SUNXI_SYSFS_MAX (2)
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#else
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#define AUTOHOTPLUG_SUNXI_SYSFS_MAX (0)
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#endif
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#ifdef CONFIG_CPU_AUTOHOTPLUG_STATS
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#define AUTOHOTPLUG_STATS_SYSFS_MAX (3 * (CONFIG_NR_CPUS))
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#else
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#define AUTOHOTPLUG_STATS_SYSFS_MAX (0)
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#endif
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#define HOTPLUG_DATA_SYSFS_MAX (9 + AUTOHOTPLUG_SUNXI_SYSFS_MAX + \
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AUTOHOTPLUG_STATS_SYSFS_MAX)
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struct autohotplug_loadinfo {
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unsigned int cpu_load[CONFIG_NR_CPUS];
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unsigned int cpu_load_relative[CONFIG_NR_CPUS];
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unsigned int max_load;
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unsigned int min_load;
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unsigned int max_cpu;
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unsigned int min_cpu;
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unsigned int big_min_load;
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};
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struct autohotplug_governor_loadinfo {
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struct timer_list cpu_timer;
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struct autohotplug_loadinfo load;
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};
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struct autohotplug_cpuinfo {
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spinlock_t load_lock; /* protects the next 4 fields */
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u64 time_in_idle;
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u64 time_in_idle_timestamp;
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};
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struct autohotplug_global_attr {
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struct attribute attr;
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ssize_t (*show)(struct kobject *kobj,
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struct attribute *attr, char *buf);
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ssize_t (*store)(struct kobject *a, struct attribute *b,
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const char *c, size_t count);
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unsigned int *value;
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unsigned int (*to_sysfs)(unsigned int, unsigned int *);
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unsigned int (*from_sysfs)(unsigned int, unsigned int *);
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};
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struct autohotplug_data_struct {
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struct attribute_group attr_group;
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struct attribute *attributes[HOTPLUG_DATA_SYSFS_MAX + 1];
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struct autohotplug_global_attr attr[HOTPLUG_DATA_SYSFS_MAX];
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};
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struct autohotplug_governor {
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void (*init_attr)(void);
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int (*get_fast_and_slow_cpus)(struct cpumask *hmp_fast_cpu_mask,
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struct cpumask *hmp_slow_cpu_mask);
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int (*try_up)(struct autohotplug_loadinfo *load);
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int (*try_down)(struct autohotplug_loadinfo *load);
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void (*try_freq_limit)(void);
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};
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extern unsigned int is_cpu_big(int cpu);
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extern unsigned int is_cpu_little(int cpu);
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extern int do_cpu_down(unsigned int cpu);
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extern int try_up_little(void);
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extern int try_up_big(void);
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extern void autohotplug_attr_add(const char *name,
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unsigned int *value, umode_t mode,
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unsigned int (*to_sysfs)(unsigned int, unsigned int *),
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unsigned int (*from_sysfs)(unsigned int, unsigned int*));
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extern int get_cpus_under(struct autohotplug_loadinfo *load,
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unsigned char level, unsigned int *first);
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extern int get_bigs_above(struct autohotplug_loadinfo *load,
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unsigned char level, unsigned int *first);
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extern int get_littles_under(struct autohotplug_loadinfo *load,
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unsigned char level, unsigned int *first);
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extern int get_bigs_under(struct autohotplug_loadinfo *load,
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unsigned char level, unsigned int *first);
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extern int get_cpus_stable_under(struct autohotplug_loadinfo *load,
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unsigned char level, unsigned int *first, int is_up);
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extern int get_cpus_online(struct autohotplug_loadinfo *load,
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int *little, int *big);
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extern struct autohotplug_governor autohotplug_smart;
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extern unsigned int load_try_down;
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extern unsigned int load_try_up;
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extern unsigned long cpu_up_lasttime;
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extern unsigned int load_up_stable_us;
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extern unsigned int load_down_stable_us;
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#ifdef CONFIG_SCHED_HMP
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extern void __init arch_get_fast_and_slow_cpus(struct cpumask *fast,
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struct cpumask *slow);
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#endif
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#endif /* #ifndef __AUTOHOTPLUG__ */
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