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:
  [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface
  [CPUFREQ] make internal cpufreq_add_dev_* static
  [CPUFREQ] use an enum for speedstep processor identification
  [CPUFREQ] Document units for transition latency
  [CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings
  [CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/
  [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used
  [CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c

3 files changed, 152 insertions, 24 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 8ba0ed0b9dd..01e366d2b6f 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 ff57c40e9b8..f20668c09ce 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 c7b081b839f..599a40b25cb 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;