#include <linux/completion.h>
#include <linux/mutex.h>
-#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, "cpufreq-core", msg)
+#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, \
+ "cpufreq-core", msg)
/**
* The "cpufreq driver" - the arch- or hardware-dependent low
/* internal prototypes */
static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
-static void handle_update(void *data);
+static void handle_update(struct work_struct *work);
/**
* Two notifier lists: the "policy" list is involved in the
spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
}
-void cpufreq_debug_printk(unsigned int type, const char *prefix, const char *fmt, ...)
+void cpufreq_debug_printk(unsigned int type, const char *prefix,
+ const char *fmt, ...)
{
char s[256];
va_list args;
WARN_ON(!prefix);
if (type & debug) {
spin_lock_irqsave(&disable_ratelimit_lock, flags);
- if (!disable_ratelimit && debug_ratelimit && !printk_ratelimit()) {
+ if (!disable_ratelimit && debug_ratelimit
+ && !printk_ratelimit()) {
spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
return;
}
module_param(debug, uint, 0644);
-MODULE_PARM_DESC(debug, "CPUfreq debugging: add 1 to debug core, 2 to debug drivers, and 4 to debug governors.");
+MODULE_PARM_DESC(debug, "CPUfreq debugging: add 1 to debug core,"
+ " 2 to debug drivers, and 4 to debug governors.");
module_param(debug_ratelimit, uint, 0644);
-MODULE_PARM_DESC(debug_ratelimit, "CPUfreq debugging: set to 0 to disable ratelimiting.");
+MODULE_PARM_DESC(debug_ratelimit, "CPUfreq debugging:"
+ " set to 0 to disable ratelimiting.");
#else /* !CONFIG_CPU_FREQ_DEBUG */
if (!l_p_j_ref_freq) {
l_p_j_ref = loops_per_jiffy;
l_p_j_ref_freq = ci->old;
- dprintk("saving %lu as reference value for loops_per_jiffy; freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
+ dprintk("saving %lu as reference value for loops_per_jiffy;"
+ "freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
}
if ((val == CPUFREQ_PRECHANGE && ci->old < ci->new) ||
(val == CPUFREQ_POSTCHANGE && ci->old > ci->new) ||
(val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
- loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq, ci->new);
- dprintk("scaling loops_per_jiffy to %lu for frequency %u kHz\n", loops_per_jiffy, ci->new);
+ loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
+ ci->new);
+ dprintk("scaling loops_per_jiffy to %lu"
+ "for frequency %u kHz\n", loops_per_jiffy, ci->new);
}
}
#else
-static inline void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci) { return; }
+static inline void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
+{
+ return;
+}
#endif
if (!strnicmp(str_governor, "performance", CPUFREQ_NAME_LEN)) {
*policy = CPUFREQ_POLICY_PERFORMANCE;
err = 0;
- } else if (!strnicmp(str_governor, "powersave", CPUFREQ_NAME_LEN)) {
+ } else if (!strnicmp(str_governor, "powersave",
+ CPUFREQ_NAME_LEN)) {
*policy = CPUFREQ_POLICY_POWERSAVE;
err = 0;
}
t = __find_governor(str_governor);
if (t == NULL) {
- char *name = kasprintf(GFP_KERNEL, "cpufreq_%s", str_governor);
+ char *name = kasprintf(GFP_KERNEL, "cpufreq_%s",
+ str_governor);
if (name) {
int ret;
/**
- * cpufreq_per_cpu_attr_read() / show_##file_name() - print out cpufreq information
+ * cpufreq_per_cpu_attr_read() / show_##file_name() -
+ * print out cpufreq information
*
* Write out information from cpufreq_driver->policy[cpu]; object must be
* "unsigned int".
show_one(scaling_max_freq, max);
show_one(scaling_cur_freq, cur);
-static int __cpufreq_set_policy(struct cpufreq_policy *data, struct cpufreq_policy *policy);
+static int __cpufreq_set_policy(struct cpufreq_policy *data,
+ struct cpufreq_policy *policy);
/**
* cpufreq_per_cpu_attr_write() / store_##file_name() - sysfs write access
/**
* show_cpuinfo_cur_freq - current CPU frequency as detected by hardware
*/
-static ssize_t show_cpuinfo_cur_freq (struct cpufreq_policy * policy, char *buf)
+static ssize_t show_cpuinfo_cur_freq (struct cpufreq_policy * policy,
+ char *buf)
{
unsigned int cur_freq = cpufreq_get(policy->cpu);
if (!cur_freq)
/**
* show_scaling_governor - show the current policy for the specified CPU
*/
-static ssize_t show_scaling_governor (struct cpufreq_policy * policy, char *buf)
+static ssize_t show_scaling_governor (struct cpufreq_policy * policy,
+ char *buf)
{
if(policy->policy == CPUFREQ_POLICY_POWERSAVE)
return sprintf(buf, "powersave\n");
if (ret != 1)
return -EINVAL;
- if (cpufreq_parse_governor(str_governor, &new_policy.policy, &new_policy.governor))
+ if (cpufreq_parse_governor(str_governor, &new_policy.policy,
+ &new_policy.governor))
return -EINVAL;
lock_cpu_hotplug();
unlock_cpu_hotplug();
- return ret ? ret : count;
+ if (ret)
+ return ret;
+ else
+ return count;
}
/**
/**
* show_scaling_available_governors - show the available CPUfreq governors
*/
-static ssize_t show_scaling_available_governors (struct cpufreq_policy * policy,
+static ssize_t show_scaling_available_governors (struct cpufreq_policy *policy,
char *buf)
{
ssize_t i = 0;
policy = cpufreq_cpu_get(policy->cpu);
if (!policy)
return -EINVAL;
- ret = fattr->show ? fattr->show(policy,buf) : -EIO;
+ if (fattr->show)
+ ret = fattr->show(policy, buf);
+ else
+ ret = -EIO;
+
cpufreq_cpu_put(policy);
return ret;
}
policy = cpufreq_cpu_get(policy->cpu);
if (!policy)
return -EINVAL;
- ret = fattr->store ? fattr->store(policy,buf,count) : -EIO;
+ if (fattr->store)
+ ret = fattr->store(policy, buf, count);
+ else
+ ret = -EIO;
+
cpufreq_cpu_put(policy);
return ret;
}
mutex_init(&policy->lock);
mutex_lock(&policy->lock);
init_completion(&policy->kobj_unregister);
- INIT_WORK(&policy->update, handle_update, (void *)(long)cpu);
+ INIT_WORK(&policy->update, handle_update);
/* call driver. From then on the cpufreq must be able
* to accept all calls to ->verify and ->setpolicy for this CPU
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
dprintk("CPU already managed, adding link\n");
- sysfs_create_link(&sys_dev->kobj,
- &managed_policy->kobj, "cpufreq");
+ ret = sysfs_create_link(&sys_dev->kobj,
+ &managed_policy->kobj,
+ "cpufreq");
+ if (ret) {
+ mutex_unlock(&policy->lock);
+ goto err_out_driver_exit;
+ }
cpufreq_debug_enable_ratelimit();
mutex_unlock(&policy->lock);
dprintk("CPU %u already managed, adding link\n", j);
cpufreq_cpu_get(cpu);
cpu_sys_dev = get_cpu_sysdev(j);
- sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj,
- "cpufreq");
+ ret = sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj,
+ "cpufreq");
+ if (ret) {
+ mutex_unlock(&policy->lock);
+ goto err_out_unregister;
+ }
}
policy->governor = NULL; /* to assure that the starting sequence is
}
-static void handle_update(void *data)
+static void handle_update(struct work_struct *work)
{
- unsigned int cpu = (unsigned int)(long)data;
+ struct cpufreq_policy *policy =
+ container_of(work, struct cpufreq_policy, update);
+ unsigned int cpu = policy->cpu;
dprintk("handle_update for cpu %u called\n", cpu);
cpufreq_update_policy(cpu);
}
* We adjust to current frequency first, and need to clean up later. So either call
* to cpufreq_update_policy() or schedule handle_update()).
*/
-static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, unsigned int new_freq)
+static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
+ unsigned int new_freq)
{
struct cpufreq_freqs freqs;
/**
- * cpufreq_quick_get - get the CPU frequency (in kHz) frpm policy->cur
+ * cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
* @cpu: CPU number
*
* This is the last known freq, without actually getting it from the driver.
unsigned int cpufreq_quick_get(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
- unsigned int ret = 0;
+ unsigned int ret_freq = 0;
if (policy) {
mutex_lock(&policy->lock);
- ret = policy->cur;
+ ret_freq = policy->cur;
mutex_unlock(&policy->lock);
cpufreq_cpu_put(policy);
}
- return (ret);
+ return (ret_freq);
}
EXPORT_SYMBOL(cpufreq_quick_get);
unsigned int cpufreq_get(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
- unsigned int ret = 0;
+ unsigned int ret_freq = 0;
if (!policy)
return 0;
mutex_lock(&policy->lock);
- ret = cpufreq_driver->get(cpu);
+ ret_freq = cpufreq_driver->get(cpu);
- if (ret && policy->cur && !(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
- /* verify no discrepancy between actual and saved value exists */
- if (unlikely(ret != policy->cur)) {
- cpufreq_out_of_sync(cpu, policy->cur, ret);
+ if (ret_freq && policy->cur &&
+ !(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
+ /* verify no discrepancy between actual and
+ saved value exists */
+ if (unlikely(ret_freq != policy->cur)) {
+ cpufreq_out_of_sync(cpu, policy->cur, ret_freq);
schedule_work(&policy->update);
}
}
out:
cpufreq_cpu_put(policy);
- return (ret);
+ return (ret_freq);
}
EXPORT_SYMBOL(cpufreq_get);
static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
{
int cpu = sysdev->id;
- unsigned int ret = 0;
+ int ret = 0;
unsigned int cur_freq = 0;
struct cpufreq_policy *cpu_policy;
static int cpufreq_resume(struct sys_device * sysdev)
{
int cpu = sysdev->id;
- unsigned int ret = 0;
+ int ret = 0;
struct cpufreq_policy *cpu_policy;
dprintk("resuming cpu %u\n", cpu);
}
EXPORT_SYMBOL_GPL(cpufreq_driver_target);
+int cpufreq_driver_getavg(struct cpufreq_policy *policy)
+{
+ int ret = 0;
+
+ policy = cpufreq_cpu_get(policy->cpu);
+ if (!policy)
+ return -EINVAL;
+
+ mutex_lock(&policy->lock);
+
+ if (cpu_online(policy->cpu) && cpufreq_driver->getavg)
+ ret = cpufreq_driver->getavg(policy->cpu);
+
+ mutex_unlock(&policy->lock);
+
+ cpufreq_cpu_put(policy);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cpufreq_driver_getavg);
+
/*
* Locking: Must be called with the lock_cpu_hotplug() lock held
* when "event" is CPUFREQ_GOV_LIMITS
*/
-static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
+static int __cpufreq_governor(struct cpufreq_policy *policy,
+ unsigned int event)
{
int ret;
if (!try_module_get(policy->governor->owner))
return -EINVAL;
- dprintk("__cpufreq_governor for CPU %u, event %u\n", policy->cpu, event);
+ dprintk("__cpufreq_governor for CPU %u, event %u\n",
+ policy->cpu, event);
ret = policy->governor->governor(policy, event);
- /* we keep one module reference alive for each CPU governed by this CPU */
+ /* we keep one module reference alive for
+ each CPU governed by this CPU */
if ((event != CPUFREQ_GOV_START) || ret)
module_put(policy->governor->owner);
if ((event == CPUFREQ_GOV_STOP) && !ret)
/*
+ * data : current policy.
+ * policy : policy to be set.
* Locking: Must be called with the lock_cpu_hotplug() lock held
*/
-static int __cpufreq_set_policy(struct cpufreq_policy *data, struct cpufreq_policy *policy)
+static int __cpufreq_set_policy(struct cpufreq_policy *data,
+ struct cpufreq_policy *policy)
{
int ret = 0;
dprintk("setting new policy for CPU %u: %u - %u kHz\n", policy->cpu,
policy->min, policy->max);
- memcpy(&policy->cpuinfo, &data->cpuinfo, sizeof(struct cpufreq_cpuinfo));
+ memcpy(&policy->cpuinfo, &data->cpuinfo,
+ sizeof(struct cpufreq_cpuinfo));
if (policy->min > data->min && policy->min > policy->max) {
ret = -EINVAL;
data->min = policy->min;
data->max = policy->max;
- dprintk("new min and max freqs are %u - %u kHz\n", data->min, data->max);
+ dprintk("new min and max freqs are %u - %u kHz\n",
+ data->min, data->max);
if (cpufreq_driver->setpolicy) {
data->policy = policy->policy;
data->governor = policy->governor;
if (__cpufreq_governor(data, CPUFREQ_GOV_START)) {
/* new governor failed, so re-start old one */
- dprintk("starting governor %s failed\n", data->governor->name);
+ dprintk("starting governor %s failed\n",
+ data->governor->name);
if (old_gov) {
data->governor = old_gov;
- __cpufreq_governor(data, CPUFREQ_GOV_START);
+ __cpufreq_governor(data,
+ CPUFREQ_GOV_START);
}
ret = -EINVAL;
goto error_out;
data->cur = policy.cur;
} else {
if (data->cur != policy.cur)
- cpufreq_out_of_sync(cpu, data->cur, policy.cur);
+ cpufreq_out_of_sync(cpu, data->cur,
+ policy.cur);
}
}
}
EXPORT_SYMBOL(cpufreq_update_policy);
-#ifdef CONFIG_HOTPLUG_CPU
static int cpufreq_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
{
.notifier_call = cpufreq_cpu_callback,
};
-#endif /* CONFIG_HOTPLUG_CPU */
/*********************************************************************
* REGISTER / UNREGISTER CPUFREQ DRIVER *
/* if all ->init() calls failed, unregister */
if (ret) {
- dprintk("no CPU initialized for driver %s\n", driver_data->name);
- sysdev_driver_unregister(&cpu_sysdev_class, &cpufreq_sysdev_driver);
+ dprintk("no CPU initialized for driver %s\n",
+ driver_data->name);
+ sysdev_driver_unregister(&cpu_sysdev_class,
+ &cpufreq_sysdev_driver);
spin_lock_irqsave(&cpufreq_driver_lock, flags);
cpufreq_driver = NULL;
git.samba.org / sfrench / cifs-2.6.git / blobdiff