@@ -275,54 +275,33 @@ static ssize_t store_freq_step(struct dbs_data *dbs_data, const char *buf,
return count;
}
-show_store_one(cs, sampling_rate);
-show_store_one(cs, sampling_down_factor);
-show_store_one(cs, up_threshold);
-show_store_one(cs, down_threshold);
-show_store_one(cs, ignore_nice_load);
-show_store_one(cs, freq_step);
-show_one(cs, min_sampling_rate);
-
-gov_sys_pol_attr_rw(sampling_rate);
-gov_sys_pol_attr_rw(sampling_down_factor);
-gov_sys_pol_attr_rw(up_threshold);
-gov_sys_pol_attr_rw(down_threshold);
-gov_sys_pol_attr_rw(ignore_nice_load);
-gov_sys_pol_attr_rw(freq_step);
-gov_sys_pol_attr_ro(min_sampling_rate);
-
-static struct attribute *dbs_attributes_gov_sys[] = {
- &min_sampling_rate_gov_sys.attr,
- &sampling_rate_gov_sys.attr,
- &sampling_down_factor_gov_sys.attr,
- &up_threshold_gov_sys.attr,
- &down_threshold_gov_sys.attr,
- &ignore_nice_load_gov_sys.attr,
- &freq_step_gov_sys.attr,
+gov_show_one(cs, sampling_rate);
+gov_show_one(cs, sampling_down_factor);
+gov_show_one(cs, up_threshold);
+gov_show_one(cs, down_threshold);
+gov_show_one(cs, ignore_nice_load);
+gov_show_one(cs, freq_step);
+gov_show_one(cs, min_sampling_rate);
+
+gov_attr_rw(sampling_rate);
+gov_attr_rw(sampling_down_factor);
+gov_attr_rw(up_threshold);
+gov_attr_rw(down_threshold);
+gov_attr_rw(ignore_nice_load);
+gov_attr_rw(freq_step);
+gov_attr_ro(min_sampling_rate);
+
+static struct attribute *cs_attributes[] = {
+ &min_sampling_rate.attr,
+ &sampling_rate.attr,
+ &sampling_down_factor.attr,
+ &up_threshold.attr,
+ &down_threshold.attr,
+ &ignore_nice_load.attr,
+ &freq_step.attr,
NULL
};
-static struct attribute_group cs_attr_group_gov_sys = {
- .attrs = dbs_attributes_gov_sys,
- .name = "conservative",
-};
-
-static struct attribute *dbs_attributes_gov_pol[] = {
- &min_sampling_rate_gov_pol.attr,
- &sampling_rate_gov_pol.attr,
- &sampling_down_factor_gov_pol.attr,
- &up_threshold_gov_pol.attr,
- &down_threshold_gov_pol.attr,
- &ignore_nice_load_gov_pol.attr,
- &freq_step_gov_pol.attr,
- NULL
-};
-
-static struct attribute_group cs_attr_group_gov_pol = {
- .attrs = dbs_attributes_gov_pol,
- .name = "conservative",
-};
-
/************************** sysfs end ************************/
static int cs_init(struct dbs_data *dbs_data, bool notify)
@@ -365,8 +344,8 @@ define_get_cpu_dbs_routines(cs_cpu_dbs_info);
static struct common_dbs_data cs_dbs_cdata = {
.governor = GOV_CONSERVATIVE,
- .attr_group_gov_sys = &cs_attr_group_gov_sys,
- .attr_group_gov_pol = &cs_attr_group_gov_pol,
+ .kobj_name = "conservative",
+ .kobj_type = { .sysfs_ops = &governor_sysfs_ops, .default_attrs = cs_attributes },
.get_cpu_cdbs = get_cpu_cdbs,
.get_cpu_dbs_info_s = get_cpu_dbs_info_s,
.gov_dbs_timer = cs_dbs_timer,
@@ -22,14 +22,62 @@
#include "cpufreq_governor.h"
-static struct attribute_group *get_sysfs_attr(struct dbs_data *dbs_data)
+static inline struct dbs_data *to_dbs_data(struct kobject *kobj)
{
- if (have_governor_per_policy())
- return dbs_data->cdata->attr_group_gov_pol;
- else
- return dbs_data->cdata->attr_group_gov_sys;
+ return container_of(kobj, struct dbs_data, 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 dbs_data *dbs_data = to_dbs_data(kobj);
+ struct governor_attr *gattr = to_gov_attr(attr);
+ int ret = -EIO;
+
+ down_read(&dbs_data->rwsem);
+
+ if (gattr->show)
+ ret = gattr->show(dbs_data, buf);
+
+ up_read(&dbs_data->rwsem);
+
+ return ret;
}
+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 governor_attr *gattr = to_gov_attr(attr);
+ int ret = -EIO;
+
+ down_write(&dbs_data->rwsem);
+
+ if (gattr->store)
+ ret = gattr->store(dbs_data, buf, count);
+
+ up_write(&dbs_data->rwsem);
+
+ 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.
+ */
+const struct sysfs_ops governor_sysfs_ops = {
+ .show = governor_show,
+ .store = governor_store,
+};
+
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
{
struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
@@ -383,6 +431,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy,
dbs_data->cdata = cdata;
dbs_data->usage_count = 1;
+ init_rwsem(&dbs_data->rwsem);
ret = cdata->init(dbs_data, !policy->governor->initialized);
if (ret)
@@ -395,10 +444,13 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy,
policy->governor_data = dbs_data;
- ret = sysfs_create_group(get_governor_parent_kobj(policy),
- get_sysfs_attr(dbs_data));
- if (ret)
+ ret = kobject_init_and_add(&dbs_data->kobj, &cdata->kobj_type,
+ get_governor_parent_kobj(policy),
+ cdata->kobj_name);
+ if (ret) {
+ pr_err("%s: failed to init dbs_data kobj: %d\n", __func__, ret);
goto reset_gdbs_data;
+ }
return 0;
@@ -426,8 +478,7 @@ static int cpufreq_governor_exit(struct cpufreq_policy *policy,
return -EBUSY;
if (!--dbs_data->usage_count) {
- sysfs_remove_group(get_governor_parent_kobj(policy),
- get_sysfs_attr(dbs_data));
+ kobject_put(&dbs_data->kobj);
policy->governor_data = NULL;
@@ -108,6 +108,31 @@ static ssize_t store_##file_name##_gov_pol \
show_one(_gov, file_name); \
store_one(_gov, file_name)
+/* 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,
+ 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##_dbs_tuners *tuners = dbs_data->tuners; \
+ return sprintf(buf, "%u\n", tuners->file_name); \
+}
+
+#define gov_attr_ro(_name) \
+static struct governor_attr _name = \
+__ATTR(_name, 0444, show_##_name, NULL)
+
+#define gov_attr_rw(_name) \
+static struct governor_attr _name = \
+__ATTR(_name, 0644, show_##_name, store_##_name)
+
/* create helper routines */
#define define_get_cpu_dbs_routines(_dbs_info) \
static struct cpu_dbs_info *get_cpu_cdbs(int cpu) \
@@ -197,14 +222,13 @@ struct cs_dbs_tuners {
};
/* Common Governor data across policies */
-struct dbs_data;
struct common_dbs_data {
/* Common across governors */
#define GOV_ONDEMAND 0
#define GOV_CONSERVATIVE 1
int governor;
- struct attribute_group *attr_group_gov_sys; /* one governor - system */
- struct attribute_group *attr_group_gov_pol; /* one governor - policy */
+ const char *kobj_name;
+ struct kobj_type kobj_type;
/*
* Common data for platforms that don't set
@@ -234,6 +258,9 @@ struct dbs_data {
struct common_dbs_data *cdata;
int usage_count;
void *tuners;
+ struct kobject kobj;
+ /* Protect concurrent updates to governor tunables from sysfs */
+ struct rw_semaphore rwsem;
};
/* Governor specific ops, will be passed to dbs_data->gov_ops */
@@ -256,6 +283,7 @@ static inline int delay_for_sampling_rate(unsigned int sampling_rate)
}
extern struct mutex cpufreq_governor_lock;
+extern const struct sysfs_ops governor_sysfs_ops;
void gov_add_timers(struct cpufreq_policy *policy, unsigned int delay);
void gov_cancel_work(struct cpu_common_dbs_info *shared);
@@ -436,54 +436,33 @@ static ssize_t store_powersave_bias(struct dbs_data *dbs_data, const char *buf,
return count;
}
-show_store_one(od, sampling_rate);
-show_store_one(od, io_is_busy);
-show_store_one(od, up_threshold);
-show_store_one(od, sampling_down_factor);
-show_store_one(od, ignore_nice_load);
-show_store_one(od, powersave_bias);
-show_one(od, min_sampling_rate);
-
-gov_sys_pol_attr_rw(sampling_rate);
-gov_sys_pol_attr_rw(io_is_busy);
-gov_sys_pol_attr_rw(up_threshold);
-gov_sys_pol_attr_rw(sampling_down_factor);
-gov_sys_pol_attr_rw(ignore_nice_load);
-gov_sys_pol_attr_rw(powersave_bias);
-gov_sys_pol_attr_ro(min_sampling_rate);
-
-static struct attribute *dbs_attributes_gov_sys[] = {
- &min_sampling_rate_gov_sys.attr,
- &sampling_rate_gov_sys.attr,
- &up_threshold_gov_sys.attr,
- &sampling_down_factor_gov_sys.attr,
- &ignore_nice_load_gov_sys.attr,
- &powersave_bias_gov_sys.attr,
- &io_is_busy_gov_sys.attr,
+gov_show_one(od, sampling_rate);
+gov_show_one(od, io_is_busy);
+gov_show_one(od, up_threshold);
+gov_show_one(od, sampling_down_factor);
+gov_show_one(od, ignore_nice_load);
+gov_show_one(od, powersave_bias);
+gov_show_one(od, min_sampling_rate);
+
+gov_attr_rw(sampling_rate);
+gov_attr_rw(io_is_busy);
+gov_attr_rw(up_threshold);
+gov_attr_rw(sampling_down_factor);
+gov_attr_rw(ignore_nice_load);
+gov_attr_rw(powersave_bias);
+gov_attr_ro(min_sampling_rate);
+
+static struct attribute *od_attributes[] = {
+ &min_sampling_rate.attr,
+ &sampling_rate.attr,
+ &up_threshold.attr,
+ &sampling_down_factor.attr,
+ &ignore_nice_load.attr,
+ &powersave_bias.attr,
+ &io_is_busy.attr,
NULL
};
-static struct attribute_group od_attr_group_gov_sys = {
- .attrs = dbs_attributes_gov_sys,
- .name = "ondemand",
-};
-
-static struct attribute *dbs_attributes_gov_pol[] = {
- &min_sampling_rate_gov_pol.attr,
- &sampling_rate_gov_pol.attr,
- &up_threshold_gov_pol.attr,
- &sampling_down_factor_gov_pol.attr,
- &ignore_nice_load_gov_pol.attr,
- &powersave_bias_gov_pol.attr,
- &io_is_busy_gov_pol.attr,
- NULL
-};
-
-static struct attribute_group od_attr_group_gov_pol = {
- .attrs = dbs_attributes_gov_pol,
- .name = "ondemand",
-};
-
/************************** sysfs end ************************/
static int od_init(struct dbs_data *dbs_data, bool notify)
@@ -542,8 +521,8 @@ static struct od_ops od_ops = {
static struct common_dbs_data od_dbs_cdata = {
.governor = GOV_ONDEMAND,
- .attr_group_gov_sys = &od_attr_group_gov_sys,
- .attr_group_gov_pol = &od_attr_group_gov_pol,
+ .kobj_name = "ondemand",
+ .kobj_type = { .sysfs_ops = &governor_sysfs_ops, .default_attrs = od_attributes },
.get_cpu_cdbs = get_cpu_cdbs,
.get_cpu_dbs_info_s = get_cpu_dbs_info_s,
.gov_dbs_timer = od_dbs_timer,