diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.h | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index e16a96130cb..cc401d147e7 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -18,19 +18,18 @@ #define _CPUFREQ_GOVERNOR_H #include <linux/cpufreq.h> -#include <linux/kobject.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> #include <linux/mutex.h> -#include <linux/workqueue.h> -#include <linux/sysfs.h> /* * The polling frequency depends on the capability of the processor. Default * polling frequency is 1000 times the transition latency of the processor. The - * governor will work on any processor with transition latency <= 10mS, using + * governor will work on any processor with transition latency <= 10ms, using * appropriate sampling rate. * - * For CPUs with transition latency > 10mS (mostly drivers with CPUFREQ_ETERNAL) - * this governor will not work. All times here are in uS. + * For CPUs with transition latency > 10ms (mostly drivers with CPUFREQ_ETERNAL) + * this governor will not work. All times here are in us (micro seconds). */ #define MIN_SAMPLING_RATE_RATIO (2) #define LATENCY_MULTIPLIER (1000) @@ -81,7 +80,7 @@ static ssize_t show_##file_name##_gov_sys \ return sprintf(buf, "%u\n", tuners->file_name); \ } \ \ -static ssize_t show_##file_name##_gov_pol \ +static ssize_t show_##file_name##_gov_pol \ (struct cpufreq_policy *policy, char *buf) \ { \ struct dbs_data *dbs_data = policy->governor_data; \ @@ -91,7 +90,7 @@ static ssize_t show_##file_name##_gov_pol \ #define store_one(_gov, file_name) \ static ssize_t store_##file_name##_gov_sys \ -(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \ +(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \ { \ struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data; \ return store_##file_name(dbs_data, buf, count); \ @@ -135,6 +134,13 @@ struct cpu_dbs_common_info { u64 prev_cpu_idle; u64 prev_cpu_wall; u64 prev_cpu_nice; + /* + * Used to keep track of load in the previous interval. However, when + * explicitly set to zero, it is used as a flag to ensure that we copy + * the previous load to the current interval only once, upon the first + * wake-up from idle. + */ + unsigned int prev_load; struct cpufreq_policy *cur_policy; struct delayed_work work; /* @@ -163,19 +169,18 @@ struct cs_cpu_dbs_info_s { unsigned int enable:1; }; -/* Per policy Governers sysfs tunables */ +/* Per policy Governors sysfs tunables */ struct od_dbs_tuners { - unsigned int ignore_nice; + unsigned int ignore_nice_load; unsigned int sampling_rate; unsigned int sampling_down_factor; unsigned int up_threshold; - unsigned int adj_up_threshold; unsigned int powersave_bias; unsigned int io_is_busy; }; struct cs_dbs_tuners { - unsigned int ignore_nice; + unsigned int ignore_nice_load; unsigned int sampling_rate; unsigned int sampling_down_factor; unsigned int up_threshold; @@ -183,7 +188,7 @@ struct cs_dbs_tuners { unsigned int freq_step; }; -/* Common Governer data across policies */ +/* Common Governor data across policies */ struct dbs_data; struct common_dbs_data { /* Common across governors */ @@ -193,7 +198,10 @@ struct common_dbs_data { struct attribute_group *attr_group_gov_sys; /* one governor - system */ struct attribute_group *attr_group_gov_pol; /* one governor - policy */ - /* Common data for platforms that don't set have_governor_per_policy */ + /* + * Common data for platforms that don't set + * CPUFREQ_HAVE_GOVERNOR_PER_POLICY + */ struct dbs_data *gdbs_data; struct cpu_dbs_common_info *(*get_cpu_cdbs)(int cpu); @@ -207,7 +215,7 @@ struct common_dbs_data { void *gov_ops; }; -/* Governer Per policy data */ +/* Governor Per policy data */ struct dbs_data { struct common_dbs_data *cdata; unsigned int min_sampling_rate; @@ -223,7 +231,7 @@ struct od_ops { void (*powersave_bias_init_cpu)(int cpu); unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy, unsigned int freq_next, unsigned int relation); - void (*freq_increase)(struct cpufreq_policy *p, unsigned int freq); + void (*freq_increase)(struct cpufreq_policy *policy, unsigned int freq); }; struct cs_ops { @@ -256,7 +264,8 @@ static ssize_t show_sampling_rate_min_gov_pol \ return sprintf(buf, "%u\n", dbs_data->min_sampling_rate); \ } -u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); +extern struct mutex cpufreq_governor_lock; + void dbs_check_cpu(struct dbs_data *dbs_data, int cpu); bool need_load_eval(struct cpu_dbs_common_info *cdbs, unsigned int sampling_rate); |