cpufreq.c

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/*
 *  (C) 2004-2009  Dominik Brodowski <[email protected]>
 *
 *  Licensed under the terms of the GNU GPL License version 2.
 */


#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include "cpufreq.h"
#include "sysfs.h"

int cpufreq_cpu_exists(unsigned int cpu)
{
    return sysfs_cpu_exists(cpu);
}

unsigned long cpufreq_get_freq_kernel(unsigned int cpu)
{
    return sysfs_get_freq_kernel(cpu);
}

unsigned long cpufreq_get_freq_hardware(unsigned int cpu)
{
    return sysfs_get_freq_hardware(cpu);
}

unsigned long cpufreq_get_transition_latency(unsigned int cpu)
{
    return sysfs_get_freq_transition_latency(cpu);
}

int cpufreq_get_hardware_limits(unsigned int cpu,
                unsigned long *min,
                unsigned long *max)
{
    if ((!min) || (!max))
        return -EINVAL;
    return sysfs_get_freq_hardware_limits(cpu, min, max);
}

char *cpufreq_get_driver(unsigned int cpu)
{
    return sysfs_get_freq_driver(cpu);
}

void cpufreq_put_driver(char *ptr)
{
    if (!ptr)
        return;
    free(ptr);
}

struct cpufreq_policy *cpufreq_get_policy(unsigned int cpu)
{
    return sysfs_get_freq_policy(cpu);
}

void cpufreq_put_policy(struct cpufreq_policy *policy)
{
    if ((!policy) || (!policy->governor))
        return;

    free(policy->governor);
    policy->governor = NULL;
    free(policy);
}

struct cpufreq_available_governors *cpufreq_get_available_governors(unsigned
                                int cpu)
{
    return sysfs_get_freq_available_governors(cpu);
}

void cpufreq_put_available_governors(struct cpufreq_available_governors *any)
{
    struct cpufreq_available_governors *tmp, *next;

    if (!any)
        return;

    tmp = any->first;
    while (tmp) {
        next = tmp->next;
        if (tmp->governor)
            free(tmp->governor);
        free(tmp);
        tmp = next;
    }
}


struct cpufreq_available_frequencies
*cpufreq_get_available_frequencies(unsigned int cpu)
{
    return sysfs_get_available_frequencies(cpu);
}

void cpufreq_put_available_frequencies(struct cpufreq_available_frequencies
                *any) {
    struct cpufreq_available_frequencies *tmp, *next;

    if (!any)
        return;

    tmp = any->first;
    while (tmp) {
        next = tmp->next;
        free(tmp);
        tmp = next;
    }
}


struct cpufreq_affected_cpus *cpufreq_get_affected_cpus(unsigned int cpu)
{
    return sysfs_get_freq_affected_cpus(cpu);
}

void cpufreq_put_affected_cpus(struct cpufreq_affected_cpus *any)
{
    struct cpufreq_affected_cpus *tmp, *next;

    if (!any)
        return;

    tmp = any->first;
    while (tmp) {
        next = tmp->next;
        free(tmp);
        tmp = next;
    }
}


struct cpufreq_affected_cpus *cpufreq_get_related_cpus(unsigned int cpu)
{
    return sysfs_get_freq_related_cpus(cpu);
}

void cpufreq_put_related_cpus(struct cpufreq_affected_cpus *any)
{
    cpufreq_put_affected_cpus(any);
}


int cpufreq_set_policy(unsigned int cpu, struct cpufreq_policy *policy)
{
    if (!policy || !(policy->governor))
        return -EINVAL;

    return sysfs_set_freq_policy(cpu, policy);
}


int cpufreq_modify_policy_min(unsigned int cpu, unsigned long min_freq)
{
    return sysfs_modify_freq_policy_min(cpu, min_freq);
}


int cpufreq_modify_policy_max(unsigned int cpu, unsigned long max_freq)
{
    return sysfs_modify_freq_policy_max(cpu, max_freq);
}


int cpufreq_modify_policy_governor(unsigned int cpu, char *governor)
{
    if ((!governor) || (strlen(governor) > 19))
        return -EINVAL;

    return sysfs_modify_freq_policy_governor(cpu, governor);
}

int cpufreq_set_frequency(unsigned int cpu, unsigned long target_frequency)
{
    return sysfs_set_frequency(cpu, target_frequency);
}

struct cpufreq_stats *cpufreq_get_stats(unsigned int cpu,
                    unsigned long long *total_time)
{
    return sysfs_get_freq_stats(cpu, total_time);
}

void cpufreq_put_stats(struct cpufreq_stats *any)
{
    struct cpufreq_stats *tmp, *next;

    if (!any)
        return;

    tmp = any->first;
    while (tmp) {
        next = tmp->next;
        free(tmp);
        tmp = next;
    }
}

unsigned long cpufreq_get_transitions(unsigned int cpu)
{
    return sysfs_get_freq_transitions(cpu);
}