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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 09:16:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 09:16:57 -0700
commit714af0693863dfb6f075f4465053976d2d076a21 (patch)
tree4da5efd5b229611cdee6a503dbae090adff3edf0 /drivers/cpufreq/cpufreq_ondemand.c
parenta03fdb7612874834d6847107198712d18b5242c7 (diff)
parentf0adb134d8dc9993a9998dc50845ec4f6ff4fadc (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Fix NULL ptr regression in powernow-k8 [CPUFREQ] Create a blacklist for processors that should not load the acpi-cpufreq module. [CPUFREQ] Powernow-k8: Enable more than 2 low P-states [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site) [CPUFREQ] ondemand - Use global sysfs dir for tuning settings [CPUFREQ] Introduce global, not per core: /sys/devices/system/cpu/cpufreq [CPUFREQ] Bail out of cpufreq_add_dev if the link for a managed CPU got created [CPUFREQ] Factor out policy setting from cpufreq_add_dev [CPUFREQ] Factor out interface creation from cpufreq_add_dev [CPUFREQ] Factor out symlink creation from cpufreq_add_dev [CPUFREQ] cleanup up -ENOMEM handling in cpufreq_add_dev [CPUFREQ] Reduce scope of cpu_sys_dev in cpufreq_add_dev [CPUFREQ] update Doc for cpuinfo_cur_freq and scaling_cur_freq
Diffstat (limited to 'drivers/cpufreq/cpufreq_ondemand.c')
-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c139
1 files changed, 113 insertions, 26 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index d7a528c80de8..071699de50ee 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -55,6 +55,18 @@ static unsigned int min_sampling_rate;
#define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000)
static void do_dbs_timer(struct work_struct *work);
+static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
+ unsigned int event);
+
+#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
+static
+#endif
+struct cpufreq_governor cpufreq_gov_ondemand = {
+ .name = "ondemand",
+ .governor = cpufreq_governor_dbs,
+ .max_transition_latency = TRANSITION_LATENCY_LIMIT,
+ .owner = THIS_MODULE,
+};
/* Sampling types */
enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE};
@@ -207,20 +219,23 @@ static void ondemand_powersave_bias_init(void)
}
/************************** 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: ondemand 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);
@@ -229,7 +244,7 @@ define_one_ro(sampling_rate_min);
/* cpufreq_ondemand 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); \
}
@@ -238,8 +253,38 @@ show_one(up_threshold, up_threshold);
show_one(ignore_nice_load, ignore_nice);
show_one(powersave_bias, powersave_bias);
-static ssize_t store_sampling_rate(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 ondemand 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 ondemand sysfs " \
+ "interface is deprecated - " #file_name "\n"); \
+ return show_##file_name(NULL, NULL, buf); \
+}
+show_one_old(sampling_rate);
+show_one_old(up_threshold);
+show_one_old(ignore_nice_load);
+show_one_old(powersave_bias);
+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_rate(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -254,8 +299,8 @@ 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;
@@ -273,8 +318,8 @@ static ssize_t store_up_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;
@@ -310,8 +355,8 @@ static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
return count;
}
-static ssize_t store_powersave_bias(struct cpufreq_policy *unused,
- const char *buf, size_t count)
+static ssize_t store_powersave_bias(struct kobject *a, struct attribute *b,
+ const char *buf, size_t count)
{
unsigned int input;
int ret;
@@ -332,7 +377,7 @@ static ssize_t store_powersave_bias(struct cpufreq_policy *unused,
}
#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);
@@ -355,6 +400,47 @@ static struct attribute_group dbs_attr_group = {
.name = "ondemand",
};
+/*** 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 ondemand sysfs " \
+ "interface is deprecated - " #file_name "\n"); \
+ return store_##file_name(NULL, NULL, buf, count); \
+}
+write_one_old(sampling_rate);
+write_one_old(up_threshold);
+write_one_old(ignore_nice_load);
+write_one_old(powersave_bias);
+
+#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(up_threshold_old, up_threshold);
+define_one_rw_old(ignore_nice_load_old, ignore_nice_load);
+define_one_rw_old(powersave_bias_old, powersave_bias);
+
+static struct attribute *dbs_attributes_old[] = {
+ &sampling_rate_max_old.attr,
+ &sampling_rate_min_old.attr,
+ &sampling_rate_old.attr,
+ &up_threshold_old.attr,
+ &ignore_nice_load_old.attr,
+ &powersave_bias_old.attr,
+ NULL
+};
+
+static struct attribute_group dbs_attr_group_old = {
+ .attrs = dbs_attributes_old,
+ .name = "ondemand",
+};
+
+/*** delete after deprecation time ***/
+
/************************** sysfs end ************************/
static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
@@ -545,7 +631,7 @@ 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;
@@ -566,13 +652,20 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
}
this_dbs_info->cpu = cpu;
ondemand_powersave_bias_init_cpu(cpu);
- mutex_init(&this_dbs_info->timer_mutex);
/*
* Start the timerschedule work, when this governor
* is used for first time
*/
if (dbs_enable == 1) {
unsigned int latency;
+
+ rc = sysfs_create_group(cpufreq_global_kobject,
+ &dbs_attr_group);
+ if (rc) {
+ mutex_unlock(&dbs_mutex);
+ return rc;
+ }
+
/* policy latency is in nS. Convert it to uS first */
latency = policy->cpuinfo.transition_latency / 1000;
if (latency == 0)
@@ -586,6 +679,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
}
mutex_unlock(&dbs_mutex);
+ mutex_init(&this_dbs_info->timer_mutex);
dbs_timer_init(this_dbs_info);
break;
@@ -593,10 +687,13 @@ 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);
mutex_destroy(&this_dbs_info->timer_mutex);
dbs_enable--;
mutex_unlock(&dbs_mutex);
+ if (!dbs_enable)
+ sysfs_remove_group(cpufreq_global_kobject,
+ &dbs_attr_group);
break;
@@ -614,16 +711,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
return 0;
}
-#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
-static
-#endif
-struct cpufreq_governor cpufreq_gov_ondemand = {
- .name = "ondemand",
- .governor = cpufreq_governor_dbs,
- .max_transition_latency = TRANSITION_LATENCY_LIMIT,
- .owner = THIS_MODULE,
-};
-
static int __init cpufreq_gov_dbs_init(void)
{
int err;