2005-04-17 05:20:36 +07:00
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/*
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* linux/drivers/cpufreq/freq_table.c
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*
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* Copyright (C) 2002 - 2003 Dominik Brodowski
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2008-05-22 13:52:05 +07:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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2005-04-17 05:20:36 +07:00
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*/
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2012-10-23 06:29:03 +07:00
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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2005-04-17 05:20:36 +07:00
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#include <linux/cpufreq.h>
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2013-08-07 00:23:03 +07:00
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#include <linux/module.h>
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2005-04-17 05:20:36 +07:00
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/*********************************************************************
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* FREQUENCY TABLE HELPERS *
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*********************************************************************/
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2015-07-29 17:53:09 +07:00
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bool policy_has_boost_freq(struct cpufreq_policy *policy)
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{
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struct cpufreq_frequency_table *pos, *table = policy->freq_table;
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if (!table)
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return false;
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cpufreq_for_each_valid_entry(pos, table)
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if (pos->flags & CPUFREQ_BOOST_FREQ)
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return true;
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return false;
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}
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EXPORT_SYMBOL_GPL(policy_has_boost_freq);
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2005-04-17 05:20:36 +07:00
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int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
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struct cpufreq_frequency_table *table)
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{
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2014-04-26 03:15:38 +07:00
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struct cpufreq_frequency_table *pos;
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2005-04-17 05:20:36 +07:00
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unsigned int min_freq = ~0;
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unsigned int max_freq = 0;
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2014-04-26 03:15:38 +07:00
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unsigned int freq;
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2005-04-17 05:20:36 +07:00
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2014-04-26 03:15:38 +07:00
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cpufreq_for_each_valid_entry(pos, table) {
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freq = pos->frequency;
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2005-04-17 05:20:36 +07:00
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2013-12-20 21:24:49 +07:00
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if (!cpufreq_boost_enabled()
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2014-04-26 03:15:38 +07:00
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&& (pos->flags & CPUFREQ_BOOST_FREQ))
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2013-12-20 21:24:49 +07:00
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continue;
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2014-04-26 03:15:38 +07:00
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pr_debug("table entry %u: %u kHz\n", (int)(pos - table), freq);
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2005-04-17 05:20:36 +07:00
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if (freq < min_freq)
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min_freq = freq;
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if (freq > max_freq)
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max_freq = freq;
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}
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policy->min = policy->cpuinfo.min_freq = min_freq;
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policy->max = policy->cpuinfo.max_freq = max_freq;
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if (policy->min == ~0)
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return -EINVAL;
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else
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return 0;
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}
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int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
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struct cpufreq_frequency_table *table)
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{
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2014-04-26 03:15:38 +07:00
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struct cpufreq_frequency_table *pos;
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unsigned int freq, next_larger = ~0;
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2013-10-02 15:43:15 +07:00
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bool found = false;
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2005-04-17 05:20:36 +07:00
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2011-03-27 20:04:46 +07:00
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pr_debug("request for verification of policy (%u - %u kHz) for cpu %u\n",
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2006-10-26 17:50:58 +07:00
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policy->min, policy->max, policy->cpu);
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2005-04-17 05:20:36 +07:00
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2013-10-02 15:43:19 +07:00
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cpufreq_verify_within_cpu_limits(policy);
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2005-04-17 05:20:36 +07:00
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2014-04-26 03:15:38 +07:00
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cpufreq_for_each_valid_entry(pos, table) {
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freq = pos->frequency;
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2013-10-02 15:43:15 +07:00
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if ((freq >= policy->min) && (freq <= policy->max)) {
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found = true;
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break;
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}
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if ((next_larger > freq) && (freq > policy->max))
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2005-04-17 05:20:36 +07:00
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next_larger = freq;
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}
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2013-10-02 15:43:15 +07:00
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if (!found) {
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2005-04-17 05:20:36 +07:00
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policy->max = next_larger;
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2013-10-02 15:43:19 +07:00
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cpufreq_verify_within_cpu_limits(policy);
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2013-10-02 15:43:15 +07:00
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}
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2005-04-17 05:20:36 +07:00
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2011-03-27 20:04:46 +07:00
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pr_debug("verification lead to (%u - %u kHz) for cpu %u\n",
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2006-10-26 17:50:58 +07:00
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policy->min, policy->max, policy->cpu);
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2005-04-17 05:20:36 +07:00
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return 0;
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}
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EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
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2013-10-03 21:57:55 +07:00
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/*
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2014-03-10 16:23:33 +07:00
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* Generic routine to verify policy & frequency table, requires driver to set
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* policy->freq_table prior to it.
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2013-10-03 21:57:55 +07:00
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*/
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int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
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{
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2016-06-03 12:28:47 +07:00
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if (!policy->freq_table)
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2013-10-03 21:57:55 +07:00
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return -ENODEV;
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2016-06-03 12:28:47 +07:00
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return cpufreq_frequency_table_verify(policy, policy->freq_table);
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2013-10-03 21:57:55 +07:00
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}
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EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
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2005-04-17 05:20:36 +07:00
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2016-06-27 17:34:07 +07:00
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int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation)
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2005-04-17 05:20:36 +07:00
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{
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2006-05-31 05:09:31 +07:00
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struct cpufreq_frequency_table optimal = {
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2013-03-30 17:55:15 +07:00
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.driver_data = ~0,
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2006-05-31 05:09:31 +07:00
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.frequency = 0,
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};
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struct cpufreq_frequency_table suboptimal = {
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2013-03-30 17:55:15 +07:00
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.driver_data = ~0,
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2006-05-31 05:09:31 +07:00
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.frequency = 0,
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};
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2014-04-26 03:15:38 +07:00
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struct cpufreq_frequency_table *pos;
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2016-06-03 12:28:49 +07:00
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struct cpufreq_frequency_table *table = policy->freq_table;
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2014-06-30 23:59:33 +07:00
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unsigned int freq, diff, i = 0;
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2016-06-03 12:28:51 +07:00
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int index;
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2005-04-17 05:20:36 +07:00
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2011-03-27 20:04:46 +07:00
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pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
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2006-10-26 17:50:58 +07:00
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target_freq, relation, policy->cpu);
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2005-04-17 05:20:36 +07:00
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switch (relation) {
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case CPUFREQ_RELATION_H:
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suboptimal.frequency = ~0;
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break;
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case CPUFREQ_RELATION_L:
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2014-06-30 23:59:33 +07:00
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case CPUFREQ_RELATION_C:
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2005-04-17 05:20:36 +07:00
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optimal.frequency = ~0;
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break;
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}
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2014-04-26 03:15:38 +07:00
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cpufreq_for_each_valid_entry(pos, table) {
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freq = pos->frequency;
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i = pos - table;
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2005-04-17 05:20:36 +07:00
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if ((freq < policy->min) || (freq > policy->max))
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continue;
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2014-05-15 01:05:52 +07:00
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if (freq == target_freq) {
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optimal.driver_data = i;
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break;
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}
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2009-01-18 13:56:41 +07:00
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switch (relation) {
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2005-04-17 05:20:36 +07:00
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case CPUFREQ_RELATION_H:
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2014-05-15 01:05:52 +07:00
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if (freq < target_freq) {
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2005-04-17 05:20:36 +07:00
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if (freq >= optimal.frequency) {
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optimal.frequency = freq;
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2013-03-30 17:55:15 +07:00
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optimal.driver_data = i;
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2005-04-17 05:20:36 +07:00
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}
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} else {
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if (freq <= suboptimal.frequency) {
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suboptimal.frequency = freq;
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2013-03-30 17:55:15 +07:00
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suboptimal.driver_data = i;
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2005-04-17 05:20:36 +07:00
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}
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}
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break;
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case CPUFREQ_RELATION_L:
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2014-05-15 01:05:52 +07:00
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if (freq > target_freq) {
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2005-04-17 05:20:36 +07:00
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if (freq <= optimal.frequency) {
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optimal.frequency = freq;
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2013-03-30 17:55:15 +07:00
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optimal.driver_data = i;
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2005-04-17 05:20:36 +07:00
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}
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} else {
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if (freq >= suboptimal.frequency) {
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suboptimal.frequency = freq;
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2013-03-30 17:55:15 +07:00
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suboptimal.driver_data = i;
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2005-04-17 05:20:36 +07:00
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}
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}
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break;
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2014-06-30 23:59:33 +07:00
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case CPUFREQ_RELATION_C:
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diff = abs(freq - target_freq);
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if (diff < optimal.frequency ||
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(diff == optimal.frequency &&
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freq > table[optimal.driver_data].frequency)) {
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optimal.frequency = diff;
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optimal.driver_data = i;
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}
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break;
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2005-04-17 05:20:36 +07:00
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}
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}
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2013-03-30 17:55:15 +07:00
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if (optimal.driver_data > i) {
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2016-06-03 12:28:51 +07:00
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if (suboptimal.driver_data > i) {
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WARN(1, "Invalid frequency table: %d\n", policy->cpu);
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return 0;
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}
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2005-04-17 05:20:36 +07:00
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2016-06-03 12:28:51 +07:00
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index = suboptimal.driver_data;
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} else
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index = optimal.driver_data;
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2005-04-17 05:20:36 +07:00
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2016-06-03 12:28:51 +07:00
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pr_debug("target index is %u, freq is:%u kHz\n", index,
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table[index].frequency);
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return index;
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2005-04-17 05:20:36 +07:00
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}
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2016-06-27 17:34:07 +07:00
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EXPORT_SYMBOL_GPL(cpufreq_table_index_unsorted);
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2005-04-17 05:20:36 +07:00
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2013-12-03 12:50:46 +07:00
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int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
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unsigned int freq)
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{
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2016-06-03 12:28:47 +07:00
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struct cpufreq_frequency_table *pos, *table = policy->freq_table;
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2013-12-03 12:50:46 +07:00
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if (unlikely(!table)) {
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pr_debug("%s: Unable to find frequency table\n", __func__);
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return -ENOENT;
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}
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2014-04-26 03:15:38 +07:00
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cpufreq_for_each_valid_entry(pos, table)
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if (pos->frequency == freq)
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return pos - table;
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2013-12-03 12:50:46 +07:00
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
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2005-04-17 05:20:36 +07:00
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/**
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2007-11-22 05:52:15 +07:00
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* show_available_freqs - show available frequencies for the specified CPU
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2005-04-17 05:20:36 +07:00
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*/
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2013-12-20 21:24:49 +07:00
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static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
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bool show_boost)
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2005-04-17 05:20:36 +07:00
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{
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ssize_t count = 0;
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2014-04-26 03:15:38 +07:00
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struct cpufreq_frequency_table *pos, *table = policy->freq_table;
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2005-04-17 05:20:36 +07:00
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2014-03-10 16:23:33 +07:00
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if (!table)
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2005-04-17 05:20:36 +07:00
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return -ENODEV;
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2014-04-26 03:15:38 +07:00
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cpufreq_for_each_valid_entry(pos, table) {
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2013-12-20 21:24:49 +07:00
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/*
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* show_boost = true and driver_data = BOOST freq
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* display BOOST freqs
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*
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* show_boost = false and driver_data = BOOST freq
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* show_boost = true and driver_data != BOOST freq
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* continue - do not display anything
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*
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* show_boost = false and driver_data != BOOST freq
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* display NON BOOST freqs
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*/
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2014-04-26 03:15:38 +07:00
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if (show_boost ^ (pos->flags & CPUFREQ_BOOST_FREQ))
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2013-12-20 21:24:49 +07:00
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continue;
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2014-04-26 03:15:38 +07:00
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count += sprintf(&buf[count], "%d ", pos->frequency);
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2005-04-17 05:20:36 +07:00
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}
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count += sprintf(&buf[count], "\n");
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return count;
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}
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2013-12-20 21:24:49 +07:00
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#define cpufreq_attr_available_freq(_name) \
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struct freq_attr cpufreq_freq_attr_##_name##_freqs = \
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__ATTR_RO(_name##_frequencies)
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/**
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* show_scaling_available_frequencies - show available normal frequencies for
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* the specified CPU
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*/
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static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
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char *buf)
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{
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return show_available_freqs(policy, buf, false);
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}
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cpufreq_attr_available_freq(scaling_available);
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2005-04-17 05:20:36 +07:00
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EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
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2013-12-20 21:24:49 +07:00
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/**
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* show_available_boost_freqs - show available boost frequencies for
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* the specified CPU
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*/
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static ssize_t scaling_boost_frequencies_show(struct cpufreq_policy *policy,
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char *buf)
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{
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return show_available_freqs(policy, buf, true);
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}
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cpufreq_attr_available_freq(scaling_boost);
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EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_boost_freqs);
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2013-10-03 21:57:55 +07:00
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struct freq_attr *cpufreq_generic_attr[] = {
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&cpufreq_freq_attr_scaling_available_freqs,
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2013-12-20 21:24:49 +07:00
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#ifdef CONFIG_CPU_FREQ_BOOST_SW
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&cpufreq_freq_attr_scaling_boost_freqs,
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#endif
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2013-10-03 21:57:55 +07:00
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NULL,
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};
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EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
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2016-06-27 17:34:07 +07:00
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static int set_freq_table_sorted(struct cpufreq_policy *policy)
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{
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|
struct cpufreq_frequency_table *pos, *table = policy->freq_table;
|
|
|
|
struct cpufreq_frequency_table *prev = NULL;
|
|
|
|
int ascending = 0;
|
|
|
|
|
|
|
|
policy->freq_table_sorted = CPUFREQ_TABLE_UNSORTED;
|
|
|
|
|
|
|
|
cpufreq_for_each_valid_entry(pos, table) {
|
|
|
|
if (!prev) {
|
|
|
|
prev = pos;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (pos->frequency == prev->frequency) {
|
|
|
|
pr_warn("Duplicate freq-table entries: %u\n",
|
|
|
|
pos->frequency);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Frequency increased from prev to pos */
|
|
|
|
if (pos->frequency > prev->frequency) {
|
|
|
|
/* But frequency was decreasing earlier */
|
|
|
|
if (ascending < 0) {
|
|
|
|
pr_debug("Freq table is unsorted\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ascending++;
|
|
|
|
} else {
|
|
|
|
/* Frequency decreased from prev to pos */
|
|
|
|
|
|
|
|
/* But frequency was increasing earlier */
|
|
|
|
if (ascending > 0) {
|
|
|
|
pr_debug("Freq table is unsorted\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ascending--;
|
|
|
|
}
|
|
|
|
|
|
|
|
prev = pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ascending > 0)
|
|
|
|
policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_ASCENDING;
|
|
|
|
else
|
|
|
|
policy->freq_table_sorted = CPUFREQ_TABLE_SORTED_DESCENDING;
|
|
|
|
|
|
|
|
pr_debug("Freq table is sorted in %s order\n",
|
|
|
|
ascending > 0 ? "ascending" : "descending");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-09-16 20:26:03 +07:00
|
|
|
int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
|
|
|
|
struct cpufreq_frequency_table *table)
|
|
|
|
{
|
2016-06-27 17:34:07 +07:00
|
|
|
int ret;
|
2013-09-16 20:26:03 +07:00
|
|
|
|
2016-06-27 17:34:07 +07:00
|
|
|
ret = cpufreq_frequency_table_cpuinfo(policy, table);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2013-09-16 20:26:03 +07:00
|
|
|
|
2016-06-27 17:34:07 +07:00
|
|
|
policy->freq_table = table;
|
|
|
|
return set_freq_table_sorted(policy);
|
2013-09-16 20:26:03 +07:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show);
|
|
|
|
|
2009-01-18 13:56:41 +07:00
|
|
|
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
|
|
|
|
MODULE_DESCRIPTION("CPUfreq frequency table helpers");
|
|
|
|
MODULE_LICENSE("GPL");
|