summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/processor_perflib.c13
-rw-r--r--drivers/cpufreq/cpufreq.c34
-rw-r--r--drivers/cpufreq/cpufreq_conservative.c129
3 files changed, 152 insertions, 24 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 8ba0ed0b9ddb..01e366d2b6fb 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -167,6 +167,19 @@ int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
return cpufreq_update_policy(pr->id);
}
+int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
+{
+ struct acpi_processor *pr;
+
+ pr = per_cpu(processors, cpu);
+ if (!pr || !pr->performance || !pr->performance->state_count)
+ return -ENODEV;
+ *limit = pr->performance->states[pr->performance_platform_limit].
+ core_frequency * 1000;
+ return 0;
+}
+EXPORT_SYMBOL(acpi_processor_get_bios_limit);
+
void acpi_processor_ppc_init(void)
{
if (!cpufreq_register_notifier
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index ff57c40e9b8b..f20668c09ce0 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -647,6 +647,21 @@ static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf)
return policy->governor->show_setspeed(policy, buf);
}
+/**
+ * show_scaling_driver - show the current cpufreq HW/BIOS limitation
+ */
+static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
+{
+ unsigned int limit;
+ int ret;
+ if (cpufreq_driver->bios_limit) {
+ ret = cpufreq_driver->bios_limit(policy->cpu, &limit);
+ if (!ret)
+ return sprintf(buf, "%u\n", limit);
+ }
+ return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
+}
+
#define define_one_ro(_name) \
static struct freq_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)
@@ -666,6 +681,7 @@ define_one_ro(cpuinfo_transition_latency);
define_one_ro(scaling_available_governors);
define_one_ro(scaling_driver);
define_one_ro(scaling_cur_freq);
+define_one_ro(bios_limit);
define_one_ro(related_cpus);
define_one_ro(affected_cpus);
define_one_rw(scaling_min_freq);
@@ -767,8 +783,9 @@ static struct kobj_type ktype_cpufreq = {
* 0: Success
* Positive: When we have a managed CPU and the sysfs got symlinked
*/
-int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
- struct sys_device *sys_dev)
+static int cpufreq_add_dev_policy(unsigned int cpu,
+ struct cpufreq_policy *policy,
+ struct sys_device *sys_dev)
{
int ret = 0;
#ifdef CONFIG_SMP
@@ -842,7 +859,8 @@ int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
/* symlink affected CPUs */
-int cpufreq_add_dev_symlink(unsigned int cpu, struct cpufreq_policy *policy)
+static int cpufreq_add_dev_symlink(unsigned int cpu,
+ struct cpufreq_policy *policy)
{
unsigned int j;
int ret = 0;
@@ -869,8 +887,9 @@ int cpufreq_add_dev_symlink(unsigned int cpu, struct cpufreq_policy *policy)
return ret;
}
-int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy,
- struct sys_device *sys_dev)
+static int cpufreq_add_dev_interface(unsigned int cpu,
+ struct cpufreq_policy *policy,
+ struct sys_device *sys_dev)
{
struct cpufreq_policy new_policy;
struct freq_attr **drv_attr;
@@ -902,6 +921,11 @@ int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy,
if (ret)
goto err_out_kobj_put;
}
+ if (cpufreq_driver->bios_limit) {
+ ret = sysfs_create_file(&policy->kobj, &bios_limit.attr);
+ if (ret)
+ goto err_out_kobj_put;
+ }
spin_lock_irqsave(&cpufreq_driver_lock, flags);
for_each_cpu(j, policy->cpus) {
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index c7b081b839ff..599a40b25cb0 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -164,20 +164,22 @@ static struct notifier_block dbs_cpufreq_notifier_block = {
};
/************************** sysfs interface ************************/
-static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf)
+static ssize_t show_sampling_rate_max(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
printk_once(KERN_INFO "CPUFREQ: conservative sampling_rate_max "
"sysfs file is deprecated - used by: %s\n", current->comm);
return sprintf(buf, "%u\n", -1U);
}
-static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf)
+static ssize_t show_sampling_rate_min(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
return sprintf(buf, "%u\n", min_sampling_rate);
}
#define define_one_ro(_name) \
-static struct freq_attr _name = \
+static struct global_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)
define_one_ro(sampling_rate_max);
@@ -186,7 +188,7 @@ define_one_ro(sampling_rate_min);
/* cpufreq_conservative Governor Tunables */
#define show_one(file_name, object) \
static ssize_t show_##file_name \
-(struct cpufreq_policy *unused, char *buf) \
+(struct kobject *kobj, struct attribute *attr, char *buf) \
{ \
return sprintf(buf, "%u\n", dbs_tuners_ins.object); \
}
@@ -197,8 +199,40 @@ show_one(down_threshold, down_threshold);
show_one(ignore_nice_load, ignore_nice);
show_one(freq_step, freq_step);
-static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused,
- const char *buf, size_t count)
+/*** delete after deprecation time ***/
+#define DEPRECATION_MSG(file_name) \
+ printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
+ "interface is deprecated - " #file_name "\n");
+
+#define show_one_old(file_name) \
+static ssize_t show_##file_name##_old \
+(struct cpufreq_policy *unused, char *buf) \
+{ \
+ printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
+ "interface is deprecated - " #file_name "\n"); \
+ return show_##file_name(NULL, NULL, buf); \
+}
+show_one_old(sampling_rate);
+show_one_old(sampling_down_factor);
+show_one_old(up_threshold);
+show_one_old(down_threshold);
+show_one_old(ignore_nice_load);
+show_one_old(freq_step);
+show_one_old(sampling_rate_min);
+show_one_old(sampling_rate_max);
+
+#define define_one_ro_old(object, _name) \
+static struct freq_attr object = \
+__ATTR(_name, 0444, show_##_name##_old, NULL)
+
+define_one_ro_old(sampling_rate_min_old, sampling_rate_min);
+define_one_ro_old(sampling_rate_max_old, sampling_rate_max);
+
+/*** delete after deprecation time ***/
+
+static ssize_t store_sampling_down_factor(struct kobject *a,
+ struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -214,8 +248,8 @@ static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused,
return count;
}
-static ssize_t store_sampling_rate(struct cpufreq_policy *unused,
- const char *buf, size_t count)
+static ssize_t store_sampling_rate(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -231,8 +265,8 @@ static ssize_t store_sampling_rate(struct cpufreq_policy *unused,
return count;
}
-static ssize_t store_up_threshold(struct cpufreq_policy *unused,
- const char *buf, size_t count)
+static ssize_t store_up_threshold(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -251,8 +285,8 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused,
return count;
}
-static ssize_t store_down_threshold(struct cpufreq_policy *unused,
- const char *buf, size_t count)
+static ssize_t store_down_threshold(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -272,8 +306,8 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused,
return count;
}
-static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
- const char *buf, size_t count)
+static ssize_t store_ignore_nice_load(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -308,8 +342,8 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
return count;
}
-static ssize_t store_freq_step(struct cpufreq_policy *policy,
- const char *buf, size_t count)
+static ssize_t store_freq_step(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -331,7 +365,7 @@ static ssize_t store_freq_step(struct cpufreq_policy *policy,
}
#define define_one_rw(_name) \
-static struct freq_attr _name = \
+static struct global_attr _name = \
__ATTR(_name, 0644, show_##_name, store_##_name)
define_one_rw(sampling_rate);
@@ -358,6 +392,53 @@ static struct attribute_group dbs_attr_group = {
.name = "conservative",
};
+/*** delete after deprecation time ***/
+
+#define write_one_old(file_name) \
+static ssize_t store_##file_name##_old \
+(struct cpufreq_policy *unused, const char *buf, size_t count) \
+{ \
+ printk_once(KERN_INFO "CPUFREQ: Per core conservative sysfs " \
+ "interface is deprecated - " #file_name "\n"); \
+ return store_##file_name(NULL, NULL, buf, count); \
+}
+write_one_old(sampling_rate);
+write_one_old(sampling_down_factor);
+write_one_old(up_threshold);
+write_one_old(down_threshold);
+write_one_old(ignore_nice_load);
+write_one_old(freq_step);
+
+#define define_one_rw_old(object, _name) \
+static struct freq_attr object = \
+__ATTR(_name, 0644, show_##_name##_old, store_##_name##_old)
+
+define_one_rw_old(sampling_rate_old, sampling_rate);
+define_one_rw_old(sampling_down_factor_old, sampling_down_factor);
+define_one_rw_old(up_threshold_old, up_threshold);
+define_one_rw_old(down_threshold_old, down_threshold);
+define_one_rw_old(ignore_nice_load_old, ignore_nice_load);
+define_one_rw_old(freq_step_old, freq_step);
+
+static struct attribute *dbs_attributes_old[] = {
+ &sampling_rate_max_old.attr,
+ &sampling_rate_min_old.attr,
+ &sampling_rate_old.attr,
+ &sampling_down_factor_old.attr,
+ &up_threshold_old.attr,
+ &down_threshold_old.attr,
+ &ignore_nice_load_old.attr,
+ &freq_step_old.attr,
+ NULL
+};
+
+static struct attribute_group dbs_attr_group_old = {
+ .attrs = dbs_attributes_old,
+ .name = "conservative",
+};
+
+/*** delete after deprecation time ***/
+
/************************** sysfs end ************************/
static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
@@ -530,7 +611,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
mutex_lock(&dbs_mutex);
- rc = sysfs_create_group(&policy->kobj, &dbs_attr_group);
+ rc = sysfs_create_group(&policy->kobj, &dbs_attr_group_old);
if (rc) {
mutex_unlock(&dbs_mutex);
return rc;
@@ -564,6 +645,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
if (latency == 0)
latency = 1;
+ rc = sysfs_create_group(cpufreq_global_kobject,
+ &dbs_attr_group);
+ if (rc) {
+ mutex_unlock(&dbs_mutex);
+ return rc;
+ }
+
/*
* conservative does not implement micro like ondemand
* governor, thus we are bound to jiffes/HZ
@@ -591,7 +679,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
dbs_timer_exit(this_dbs_info);
mutex_lock(&dbs_mutex);
- sysfs_remove_group(&policy->kobj, &dbs_attr_group);
+ sysfs_remove_group(&policy->kobj, &dbs_attr_group_old);
dbs_enable--;
mutex_destroy(&this_dbs_info->timer_mutex);
@@ -605,6 +693,9 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
CPUFREQ_TRANSITION_NOTIFIER);
mutex_unlock(&dbs_mutex);
+ if (!dbs_enable)
+ sysfs_remove_group(cpufreq_global_kobject,
+ &dbs_attr_group);
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 08:42:36 +0000