From 0bed612be638e41456cd8cb270a2b411a5b43d63 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sat, 2 Apr 2016 01:08:43 +0200 Subject: cpufreq: sched: Helpers to add and remove update_util hooks Replace the single helper for adding and removing cpufreq utilization update hooks, cpufreq_set_update_util_data(), with a pair of helpers, cpufreq_add_update_util_hook() and cpufreq_remove_update_util_hook(), and modify the users of cpufreq_set_update_util_data() accordingly. With the new helpers, the code using them doesn't need to worry about the internals of struct update_util_data and in particular it doesn't need to worry about populating the func field in it properly upfront. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar Acked-by: Peter Zijlstra (Intel) --- drivers/cpufreq/cpufreq_governor.c | 76 +++++++++++++++++++------------------- 1 file changed, 38 insertions(+), 38 deletions(-) (limited to 'drivers/cpufreq/cpufreq_governor.c') diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 10a5cfeae8c5..3a0312f46027 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -258,43 +258,6 @@ unsigned int dbs_update(struct cpufreq_policy *policy) } EXPORT_SYMBOL_GPL(dbs_update); -static void gov_set_update_util(struct policy_dbs_info *policy_dbs, - unsigned int delay_us) -{ - struct cpufreq_policy *policy = policy_dbs->policy; - int cpu; - - gov_update_sample_delay(policy_dbs, delay_us); - policy_dbs->last_sample_time = 0; - - for_each_cpu(cpu, policy->cpus) { - struct cpu_dbs_info *cdbs = &per_cpu(cpu_dbs, cpu); - - cpufreq_set_update_util_data(cpu, &cdbs->update_util); - } -} - -static inline void gov_clear_update_util(struct cpufreq_policy *policy) -{ - int i; - - for_each_cpu(i, policy->cpus) - cpufreq_set_update_util_data(i, NULL); - - synchronize_sched(); -} - -static void gov_cancel_work(struct cpufreq_policy *policy) -{ - struct policy_dbs_info *policy_dbs = policy->governor_data; - - gov_clear_update_util(policy_dbs->policy); - irq_work_sync(&policy_dbs->irq_work); - cancel_work_sync(&policy_dbs->work); - atomic_set(&policy_dbs->work_count, 0); - policy_dbs->work_in_progress = false; -} - static void dbs_work_handler(struct work_struct *work) { struct policy_dbs_info *policy_dbs; @@ -382,6 +345,44 @@ static void dbs_update_util_handler(struct update_util_data *data, u64 time, irq_work_queue(&policy_dbs->irq_work); } +static void gov_set_update_util(struct policy_dbs_info *policy_dbs, + unsigned int delay_us) +{ + struct cpufreq_policy *policy = policy_dbs->policy; + int cpu; + + gov_update_sample_delay(policy_dbs, delay_us); + policy_dbs->last_sample_time = 0; + + for_each_cpu(cpu, policy->cpus) { + struct cpu_dbs_info *cdbs = &per_cpu(cpu_dbs, cpu); + + cpufreq_add_update_util_hook(cpu, &cdbs->update_util, + dbs_update_util_handler); + } +} + +static inline void gov_clear_update_util(struct cpufreq_policy *policy) +{ + int i; + + for_each_cpu(i, policy->cpus) + cpufreq_remove_update_util_hook(i); + + synchronize_sched(); +} + +static void gov_cancel_work(struct cpufreq_policy *policy) +{ + struct policy_dbs_info *policy_dbs = policy->governor_data; + + gov_clear_update_util(policy_dbs->policy); + irq_work_sync(&policy_dbs->irq_work); + cancel_work_sync(&policy_dbs->work); + atomic_set(&policy_dbs->work_count, 0); + policy_dbs->work_in_progress = false; +} + static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *policy, struct dbs_governor *gov) { @@ -404,7 +405,6 @@ static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *poli struct cpu_dbs_info *j_cdbs = &per_cpu(cpu_dbs, j); j_cdbs->policy_dbs = policy_dbs; - j_cdbs->update_util.func = dbs_update_util_handler; } return policy_dbs; } -- cgit v1.2.3 From 0dd3c1d678aa219a7332984fcedbdd8970e92d5b Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 22 Mar 2016 02:47:51 +0100 Subject: cpufreq: governor: New data type for management part of dbs_data In addition to fields representing governor tunables, struct dbs_data contains some fields needed for the management of objects of that type. As it turns out, that part of struct dbs_data may be shared with (future) governors that won't use the common code used by "ondemand" and "conservative", so move it to a separate struct type and modify the code using struct dbs_data to follow. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar --- drivers/cpufreq/cpufreq_conservative.c | 25 ++++++---- drivers/cpufreq/cpufreq_governor.c | 90 +++++++++++++++++++++------------- drivers/cpufreq/cpufreq_governor.h | 35 +++++++------ drivers/cpufreq/cpufreq_ondemand.c | 29 ++++++----- 4 files changed, 107 insertions(+), 72 deletions(-) (limited to 'drivers/cpufreq/cpufreq_governor.c') diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index bf4913f6453b..316df247e00d 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -129,9 +129,10 @@ static struct notifier_block cs_cpufreq_notifier_block = { /************************** sysfs interface ************************/ static struct dbs_governor cs_dbs_gov; -static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, - const char *buf, size_t count) +static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); unsigned int input; int ret; ret = sscanf(buf, "%u", &input); @@ -143,9 +144,10 @@ static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, return count; } -static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_up_threshold(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct cs_dbs_tuners *cs_tuners = dbs_data->tuners; unsigned int input; int ret; @@ -158,9 +160,10 @@ static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf, return count; } -static ssize_t store_down_threshold(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_down_threshold(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct cs_dbs_tuners *cs_tuners = dbs_data->tuners; unsigned int input; int ret; @@ -175,9 +178,10 @@ static ssize_t store_down_threshold(struct dbs_data *dbs_data, const char *buf, return count; } -static ssize_t store_ignore_nice_load(struct dbs_data *dbs_data, - const char *buf, size_t count) +static ssize_t store_ignore_nice_load(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); unsigned int input; int ret; @@ -199,9 +203,10 @@ static ssize_t store_ignore_nice_load(struct dbs_data *dbs_data, return count; } -static ssize_t store_freq_step(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_freq_step(struct gov_attr_set *attr_set, const char *buf, + size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct cs_dbs_tuners *cs_tuners = dbs_data->tuners; unsigned int input; int ret; diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 3a0312f46027..6a565e248ad3 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -43,9 +43,10 @@ static DEFINE_MUTEX(gov_dbs_data_mutex); * This must be called with dbs_data->mutex held, otherwise traversing * policy_dbs_list isn't safe. */ -ssize_t store_sampling_rate(struct dbs_data *dbs_data, const char *buf, +ssize_t store_sampling_rate(struct gov_attr_set *attr_set, const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct policy_dbs_info *policy_dbs; unsigned int rate; int ret; @@ -59,7 +60,7 @@ ssize_t store_sampling_rate(struct dbs_data *dbs_data, const char *buf, * We are operating under dbs_data->mutex and so the list and its * entries can't be freed concurrently. */ - list_for_each_entry(policy_dbs, &dbs_data->policy_dbs_list, list) { + list_for_each_entry(policy_dbs, &attr_set->policy_list, list) { mutex_lock(&policy_dbs->timer_mutex); /* * On 32-bit architectures this may race with the @@ -96,7 +97,7 @@ void gov_update_cpu_data(struct dbs_data *dbs_data) { struct policy_dbs_info *policy_dbs; - list_for_each_entry(policy_dbs, &dbs_data->policy_dbs_list, list) { + list_for_each_entry(policy_dbs, &dbs_data->attr_set.policy_list, list) { unsigned int j; for_each_cpu(j, policy_dbs->policy->cpus) { @@ -111,9 +112,9 @@ void gov_update_cpu_data(struct dbs_data *dbs_data) } EXPORT_SYMBOL_GPL(gov_update_cpu_data); -static inline struct dbs_data *to_dbs_data(struct kobject *kobj) +static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj) { - return container_of(kobj, struct dbs_data, kobj); + return container_of(kobj, struct gov_attr_set, kobj); } static inline struct governor_attr *to_gov_attr(struct attribute *attr) @@ -124,25 +125,24 @@ static inline struct governor_attr *to_gov_attr(struct attribute *attr) static ssize_t governor_show(struct kobject *kobj, struct attribute *attr, char *buf) { - struct dbs_data *dbs_data = to_dbs_data(kobj); struct governor_attr *gattr = to_gov_attr(attr); - return gattr->show(dbs_data, buf); + return gattr->show(to_gov_attr_set(kobj), buf); } static ssize_t governor_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { - struct dbs_data *dbs_data = to_dbs_data(kobj); + struct gov_attr_set *attr_set = to_gov_attr_set(kobj); struct governor_attr *gattr = to_gov_attr(attr); int ret = -EBUSY; - mutex_lock(&dbs_data->mutex); + mutex_lock(&attr_set->update_lock); - if (dbs_data->usage_count) - ret = gattr->store(dbs_data, buf, count); + if (attr_set->usage_count) + ret = gattr->store(attr_set, buf, count); - mutex_unlock(&dbs_data->mutex); + mutex_unlock(&attr_set->update_lock); return ret; } @@ -425,6 +425,41 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs, gov->free(policy_dbs); } +static void gov_attr_set_init(struct gov_attr_set *attr_set, + struct list_head *list_node) +{ + INIT_LIST_HEAD(&attr_set->policy_list); + mutex_init(&attr_set->update_lock); + attr_set->usage_count = 1; + list_add(list_node, &attr_set->policy_list); +} + +static void gov_attr_set_get(struct gov_attr_set *attr_set, + struct list_head *list_node) +{ + mutex_lock(&attr_set->update_lock); + attr_set->usage_count++; + list_add(list_node, &attr_set->policy_list); + mutex_unlock(&attr_set->update_lock); +} + +static unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, + struct list_head *list_node) +{ + unsigned int count; + + mutex_lock(&attr_set->update_lock); + list_del(list_node); + count = --attr_set->usage_count; + mutex_unlock(&attr_set->update_lock); + if (count) + return count; + + kobject_put(&attr_set->kobj); + mutex_destroy(&attr_set->update_lock); + return 0; +} + static int cpufreq_governor_init(struct cpufreq_policy *policy) { struct dbs_governor *gov = dbs_governor_of(policy); @@ -453,10 +488,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy) policy_dbs->dbs_data = dbs_data; policy->governor_data = policy_dbs; - mutex_lock(&dbs_data->mutex); - dbs_data->usage_count++; - list_add(&policy_dbs->list, &dbs_data->policy_dbs_list); - mutex_unlock(&dbs_data->mutex); + gov_attr_set_get(&dbs_data->attr_set, &policy_dbs->list); goto out; } @@ -466,8 +498,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy) goto free_policy_dbs_info; } - INIT_LIST_HEAD(&dbs_data->policy_dbs_list); - mutex_init(&dbs_data->mutex); + gov_attr_set_init(&dbs_data->attr_set, &policy_dbs->list); ret = gov->init(dbs_data, !policy->governor->initialized); if (ret) @@ -487,14 +518,11 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy) if (!have_governor_per_policy()) gov->gdbs_data = dbs_data; - policy->governor_data = policy_dbs; - policy_dbs->dbs_data = dbs_data; - dbs_data->usage_count = 1; - list_add(&policy_dbs->list, &dbs_data->policy_dbs_list); + policy->governor_data = policy_dbs; gov->kobj_type.sysfs_ops = &governor_sysfs_ops; - ret = kobject_init_and_add(&dbs_data->kobj, &gov->kobj_type, + ret = kobject_init_and_add(&dbs_data->attr_set.kobj, &gov->kobj_type, get_governor_parent_kobj(policy), "%s", gov->gov.name); if (!ret) @@ -523,29 +551,21 @@ static int cpufreq_governor_exit(struct cpufreq_policy *policy) struct dbs_governor *gov = dbs_governor_of(policy); struct policy_dbs_info *policy_dbs = policy->governor_data; struct dbs_data *dbs_data = policy_dbs->dbs_data; - int count; + unsigned int count; /* Protect gov->gdbs_data against concurrent updates. */ mutex_lock(&gov_dbs_data_mutex); - mutex_lock(&dbs_data->mutex); - list_del(&policy_dbs->list); - count = --dbs_data->usage_count; - mutex_unlock(&dbs_data->mutex); + count = gov_attr_set_put(&dbs_data->attr_set, &policy_dbs->list); - if (!count) { - kobject_put(&dbs_data->kobj); - - policy->governor_data = NULL; + policy->governor_data = NULL; + if (!count) { if (!have_governor_per_policy()) gov->gdbs_data = NULL; gov->exit(dbs_data, policy->governor->initialized == 1); - mutex_destroy(&dbs_data->mutex); kfree(dbs_data); - } else { - policy->governor_data = NULL; } free_policy_dbs_info(policy_dbs, gov); diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 61ff82fe0613..f4ad431130b8 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -41,6 +41,13 @@ /* Ondemand Sampling types */ enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE}; +struct gov_attr_set { + struct kobject kobj; + struct list_head policy_list; + struct mutex update_lock; + int usage_count; +}; + /* * Abbreviations: * dbs: used as a shortform for demand based switching It helps to keep variable @@ -52,7 +59,7 @@ enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE}; /* Governor demand based switching data (per-policy or global). */ struct dbs_data { - int usage_count; + struct gov_attr_set attr_set; void *tuners; unsigned int min_sampling_rate; unsigned int ignore_nice_load; @@ -60,37 +67,35 @@ struct dbs_data { unsigned int sampling_down_factor; unsigned int up_threshold; unsigned int io_is_busy; - - struct kobject kobj; - struct list_head policy_dbs_list; - /* - * Protect concurrent updates to governor tunables from sysfs, - * policy_dbs_list and usage_count. - */ - struct mutex mutex; }; +static inline struct dbs_data *to_dbs_data(struct gov_attr_set *attr_set) +{ + return container_of(attr_set, struct dbs_data, attr_set); +} + /* Governor's specific attributes */ -struct dbs_data; struct governor_attr { struct attribute attr; - ssize_t (*show)(struct dbs_data *dbs_data, char *buf); - ssize_t (*store)(struct dbs_data *dbs_data, const char *buf, + ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); + ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, size_t count); }; #define gov_show_one(_gov, file_name) \ static ssize_t show_##file_name \ -(struct dbs_data *dbs_data, char *buf) \ +(struct gov_attr_set *attr_set, char *buf) \ { \ + struct dbs_data *dbs_data = to_dbs_data(attr_set); \ struct _gov##_dbs_tuners *tuners = dbs_data->tuners; \ return sprintf(buf, "%u\n", tuners->file_name); \ } #define gov_show_one_common(file_name) \ static ssize_t show_##file_name \ -(struct dbs_data *dbs_data, char *buf) \ +(struct gov_attr_set *attr_set, char *buf) \ { \ + struct dbs_data *dbs_data = to_dbs_data(attr_set); \ return sprintf(buf, "%u\n", dbs_data->file_name); \ } @@ -184,7 +189,7 @@ void od_register_powersave_bias_handler(unsigned int (*f) (struct cpufreq_policy *, unsigned int, unsigned int), unsigned int powersave_bias); void od_unregister_powersave_bias_handler(void); -ssize_t store_sampling_rate(struct dbs_data *dbs_data, const char *buf, +ssize_t store_sampling_rate(struct gov_attr_set *attr_set, const char *buf, size_t count); void gov_update_cpu_data(struct dbs_data *dbs_data); #endif /* _CPUFREQ_GOVERNOR_H */ diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index acd80272ded6..300163430516 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -207,9 +207,10 @@ static unsigned int od_dbs_timer(struct cpufreq_policy *policy) /************************** sysfs interface ************************/ static struct dbs_governor od_dbs_gov; -static ssize_t store_io_is_busy(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_io_is_busy(struct gov_attr_set *attr_set, const char *buf, + size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); unsigned int input; int ret; @@ -224,9 +225,10 @@ static ssize_t store_io_is_busy(struct dbs_data *dbs_data, const char *buf, return count; } -static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_up_threshold(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); unsigned int input; int ret; ret = sscanf(buf, "%u", &input); @@ -240,9 +242,10 @@ static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf, return count; } -static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, - const char *buf, size_t count) +static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct policy_dbs_info *policy_dbs; unsigned int input; int ret; @@ -254,7 +257,7 @@ static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, dbs_data->sampling_down_factor = input; /* Reset down sampling multiplier in case it was active */ - list_for_each_entry(policy_dbs, &dbs_data->policy_dbs_list, list) { + list_for_each_entry(policy_dbs, &attr_set->policy_list, list) { /* * Doing this without locking might lead to using different * rate_mult values in od_update() and od_dbs_timer(). @@ -267,9 +270,10 @@ static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, return count; } -static ssize_t store_ignore_nice_load(struct dbs_data *dbs_data, - const char *buf, size_t count) +static ssize_t store_ignore_nice_load(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); unsigned int input; int ret; @@ -291,9 +295,10 @@ static ssize_t store_ignore_nice_load(struct dbs_data *dbs_data, return count; } -static ssize_t store_powersave_bias(struct dbs_data *dbs_data, const char *buf, - size_t count) +static ssize_t store_powersave_bias(struct gov_attr_set *attr_set, + const char *buf, size_t count) { + struct dbs_data *dbs_data = to_dbs_data(attr_set); struct od_dbs_tuners *od_tuners = dbs_data->tuners; struct policy_dbs_info *policy_dbs; unsigned int input; @@ -308,7 +313,7 @@ static ssize_t store_powersave_bias(struct dbs_data *dbs_data, const char *buf, od_tuners->powersave_bias = input; - list_for_each_entry(policy_dbs, &dbs_data->policy_dbs_list, list) + list_for_each_entry(policy_dbs, &attr_set->policy_list, list) ondemand_powersave_bias_init(policy_dbs->policy); return count; -- cgit v1.2.3 From 2d0c58ad60376160ee8b535e570a38b9a349b6a4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 22 Mar 2016 02:49:15 +0100 Subject: cpufreq: governor: Move abstract gov_attr_set code to seperate file Move abstract code related to struct gov_attr_set to a separate (new) file so it can be shared with (future) goverernors that won't share more code with "ondemand" and "conservative". No intentional functional changes. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar --- drivers/cpufreq/Kconfig | 4 ++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/cpufreq_governor.c | 82 ---------------------------- drivers/cpufreq/cpufreq_governor.h | 6 +++ drivers/cpufreq/cpufreq_governor_attr_set.c | 84 +++++++++++++++++++++++++++++ 5 files changed, 95 insertions(+), 82 deletions(-) create mode 100644 drivers/cpufreq/cpufreq_governor_attr_set.c (limited to 'drivers/cpufreq/cpufreq_governor.c') diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index a7f45853c103..7fd87106ba46 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -18,7 +18,11 @@ config CPU_FREQ if CPU_FREQ +config CPU_FREQ_GOV_ATTR_SET + bool + config CPU_FREQ_GOV_COMMON + select CPU_FREQ_GOV_ATTR_SET select IRQ_WORK bool diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 9e63fb1b09f8..6d1186701a9c 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE) += cpufreq_userspace.o obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o +obj-$(CONFIG_CPU_FREQ_GOV_ATTR_SET) += cpufreq_governor_attr_set.o obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 6a565e248ad3..20f0a4e114d1 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -112,53 +112,6 @@ void gov_update_cpu_data(struct dbs_data *dbs_data) } EXPORT_SYMBOL_GPL(gov_update_cpu_data); -static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj) -{ - return container_of(kobj, struct gov_attr_set, kobj); -} - -static inline struct governor_attr *to_gov_attr(struct attribute *attr) -{ - return container_of(attr, struct governor_attr, attr); -} - -static ssize_t governor_show(struct kobject *kobj, struct attribute *attr, - char *buf) -{ - struct governor_attr *gattr = to_gov_attr(attr); - - return gattr->show(to_gov_attr_set(kobj), buf); -} - -static ssize_t governor_store(struct kobject *kobj, struct attribute *attr, - const char *buf, size_t count) -{ - struct gov_attr_set *attr_set = to_gov_attr_set(kobj); - struct governor_attr *gattr = to_gov_attr(attr); - int ret = -EBUSY; - - mutex_lock(&attr_set->update_lock); - - if (attr_set->usage_count) - ret = gattr->store(attr_set, buf, count); - - mutex_unlock(&attr_set->update_lock); - - return ret; -} - -/* - * Sysfs Ops for accessing governor attributes. - * - * All show/store invocations for governor specific sysfs attributes, will first - * call the below show/store callbacks and the attribute specific callback will - * be called from within it. - */ -static const struct sysfs_ops governor_sysfs_ops = { - .show = governor_show, - .store = governor_store, -}; - unsigned int dbs_update(struct cpufreq_policy *policy) { struct policy_dbs_info *policy_dbs = policy->governor_data; @@ -425,41 +378,6 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs, gov->free(policy_dbs); } -static void gov_attr_set_init(struct gov_attr_set *attr_set, - struct list_head *list_node) -{ - INIT_LIST_HEAD(&attr_set->policy_list); - mutex_init(&attr_set->update_lock); - attr_set->usage_count = 1; - list_add(list_node, &attr_set->policy_list); -} - -static void gov_attr_set_get(struct gov_attr_set *attr_set, - struct list_head *list_node) -{ - mutex_lock(&attr_set->update_lock); - attr_set->usage_count++; - list_add(list_node, &attr_set->policy_list); - mutex_unlock(&attr_set->update_lock); -} - -static unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, - struct list_head *list_node) -{ - unsigned int count; - - mutex_lock(&attr_set->update_lock); - list_del(list_node); - count = --attr_set->usage_count; - mutex_unlock(&attr_set->update_lock); - if (count) - return count; - - kobject_put(&attr_set->kobj); - mutex_destroy(&attr_set->update_lock); - return 0; -} - static int cpufreq_governor_init(struct cpufreq_policy *policy) { struct dbs_governor *gov = dbs_governor_of(policy); diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index f4ad431130b8..ccdd0814efbc 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -48,6 +48,12 @@ struct gov_attr_set { int usage_count; }; +extern const struct sysfs_ops governor_sysfs_ops; + +void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); +void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); +unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); + /* * Abbreviations: * dbs: used as a shortform for demand based switching It helps to keep variable diff --git a/drivers/cpufreq/cpufreq_governor_attr_set.c b/drivers/cpufreq/cpufreq_governor_attr_set.c new file mode 100644 index 000000000000..52841f807a7e --- /dev/null +++ b/drivers/cpufreq/cpufreq_governor_attr_set.c @@ -0,0 +1,84 @@ +/* + * Abstract code for CPUFreq governor tunable sysfs attributes. + * + * Copyright (C) 2016, Intel Corporation + * Author: Rafael J. Wysocki + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "cpufreq_governor.h" + +static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj) +{ + return container_of(kobj, struct gov_attr_set, kobj); +} + +static inline struct governor_attr *to_gov_attr(struct attribute *attr) +{ + return container_of(attr, struct governor_attr, attr); +} + +static ssize_t governor_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + struct governor_attr *gattr = to_gov_attr(attr); + + return gattr->show(to_gov_attr_set(kobj), buf); +} + +static ssize_t governor_store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + struct gov_attr_set *attr_set = to_gov_attr_set(kobj); + struct governor_attr *gattr = to_gov_attr(attr); + int ret; + + mutex_lock(&attr_set->update_lock); + ret = attr_set->usage_count ? gattr->store(attr_set, buf, count) : -EBUSY; + mutex_unlock(&attr_set->update_lock); + return ret; +} + +const struct sysfs_ops governor_sysfs_ops = { + .show = governor_show, + .store = governor_store, +}; +EXPORT_SYMBOL_GPL(governor_sysfs_ops); + +void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node) +{ + INIT_LIST_HEAD(&attr_set->policy_list); + mutex_init(&attr_set->update_lock); + attr_set->usage_count = 1; + list_add(list_node, &attr_set->policy_list); +} +EXPORT_SYMBOL_GPL(gov_attr_set_init); + +void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node) +{ + mutex_lock(&attr_set->update_lock); + attr_set->usage_count++; + list_add(list_node, &attr_set->policy_list); + mutex_unlock(&attr_set->update_lock); +} +EXPORT_SYMBOL_GPL(gov_attr_set_get); + +unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node) +{ + unsigned int count; + + mutex_lock(&attr_set->update_lock); + list_del(list_node); + count = --attr_set->usage_count; + mutex_unlock(&attr_set->update_lock); + if (count) + return count; + + kobject_put(&attr_set->kobj); + mutex_destroy(&attr_set->update_lock); + return 0; +} +EXPORT_SYMBOL_GPL(gov_attr_set_put); -- cgit v1.2.3