Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 15 Feb 2003 05:16:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 15 Feb 2003 05:16:17 -0500 Received: from natsmtp01.webmailer.de ([192.67.198.81]:32993 "EHLO post.webmailer.de") by vger.kernel.org with ESMTP id ; Sat, 15 Feb 2003 05:16:09 -0500 Date: Sat, 15 Feb 2003 11:23:41 +0100 From: Dominik Brodowski To: torvalds@transmeta.com, davej@suse.de Cc: linux-kernel@vger.kernel.org, cpufreq@www.linux.org.uk Subject: [PATCH 2.5.61] cpufreq: move frequency table helpers to extra module Message-ID: <20030215102341.GA11502@brodo.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 15033 Lines: 540 The CPU frequency table helpers can easily be modularized -- especially as they are not needed on all architectures, or for all drivers (even on x86 -- see longrun and gx-suspmod) arch/i386/Kconfig | 22 +++- arch/sparc64/Kconfig | 7 + drivers/Makefile | 1 drivers/cpufreq/Makefile | 2 drivers/cpufreq/freq_table.c | 203 +++++++++++++++++++++++++++++++++++++++++++ include/linux/cpufreq.h | 3 kernel/cpufreq.c | 188 --------------------------------------- 7 files changed, 231 insertions(+), 195 deletions(-) diff -ruN linux-original/arch/i386/Kconfig linux/arch/i386/Kconfig --- linux-original/arch/i386/Kconfig 2003-02-15 10:12:03.000000000 +0100 +++ linux/arch/i386/Kconfig 2003-02-15 10:15:27.000000000 +0100 @@ -994,9 +994,19 @@ If in doubt, say N. +config CPU_FREQ_TABLE + tristate "CPU frequency table helpers" + depends on CPU_FREQ + default y + help + Many CPUFreq drivers use these helpers, so only say N here if + the CPUFreq driver of your choice doesn't need these helpers. + + If in doubt, say Y. + config X86_ACPI_CPUFREQ tristate "ACPI Processor P-States driver" - depends on CPU_FREQ && ACPI_PROCESSOR + depends on CPU_FREQ_TABLE && ACPI_PROCESSOR help This driver adds a CPUFreq driver which utilizes the ACPI Processor Performance States. @@ -1007,7 +1017,7 @@ config X86_POWERNOW_K6 tristate "AMD Mobile K6-2/K6-3 PowerNow!" - depends on CPU_FREQ + depends on CPU_FREQ_TABLE help This adds the CPUFreq driver for mobile AMD K6-2+ and mobile AMD K6-3+ processors. @@ -1018,7 +1028,7 @@ config X86_POWERNOW_K7 tristate "AMD Mobile Athlon/Duron PowerNow!" - depends on CPU_FREQ + depends on CPU_FREQ_TABLE help This adds the CPUFreq driver for mobile AMD K7 mobile processors. @@ -1028,7 +1038,7 @@ config ELAN_CPUFREQ tristate "AMD Elan" - depends on CPU_FREQ && MELAN + depends on CPU_FREQ_TABLE && MELAN ---help--- This adds the CPUFreq driver for AMD Elan SC400 and SC410 processors. @@ -1055,7 +1065,7 @@ config X86_SPEEDSTEP tristate "Intel Speedstep" - depends on CPU_FREQ + depends on CPU_FREQ_TABLE help This adds the CPUFreq driver for certain mobile Intel Pentium III (Coppermine), all mobile Intel Pentium III-M (Tulatin) and all @@ -1067,7 +1077,7 @@ config X86_P4_CLOCKMOD tristate "Intel Pentium 4 clock modulation" - depends on CPU_FREQ + depends on CPU_FREQ_TABLE help This adds the CPUFreq driver for Intel Pentium 4 / XEON processors. diff -ruN linux-original/arch/sparc64/Kconfig linux/arch/sparc64/Kconfig --- linux-original/arch/sparc64/Kconfig 2003-02-15 10:12:08.000000000 +0100 +++ linux/arch/sparc64/Kconfig 2003-02-15 10:15:00.000000000 +0100 @@ -162,9 +162,14 @@ If in doubt, say N. +config CPU_FREQ_TABLE + tristate + default y + + config US3_FREQ tristate "UltraSPARC-III CPU Frequency driver" - depends on CPU_FREQ + depends on CPU_FREQ_TABLE help This adds the CPUFreq driver for UltraSPARC-III processors. diff -ruN linux-original/drivers/Makefile linux/drivers/Makefile --- linux-original/drivers/Makefile 2003-02-15 10:12:51.000000000 +0100 +++ linux/drivers/Makefile 2003-02-15 10:15:00.000000000 +0100 @@ -45,3 +45,4 @@ obj-$(CONFIG_ISDN_BOOL) += isdn/ obj-$(CONFIG_MCA) += mca/ obj-$(CONFIG_EISA) += eisa/ +obj-$(CONFIG_CPU_FREQ) += cpufreq/ diff -ruN linux-original/drivers/cpufreq/Makefile linux/drivers/cpufreq/Makefile --- linux-original/drivers/cpufreq/Makefile 1970-01-01 01:00:00.000000000 +0100 +++ linux/drivers/cpufreq/Makefile 2003-02-15 10:15:00.000000000 +0100 @@ -0,0 +1,2 @@ +#CPUfreq governors and cross-arch helpers +obj-$(CONFIG_CPU_FREQ_TABLE) += freq_table.o diff -ruN linux-original/drivers/cpufreq/freq_table.c linux/drivers/cpufreq/freq_table.c --- linux-original/drivers/cpufreq/freq_table.c 1970-01-01 01:00:00.000000000 +0100 +++ linux/drivers/cpufreq/freq_table.c 2003-02-15 10:16:27.000000000 +0100 @@ -0,0 +1,203 @@ +/* + * linux/drivers/cpufreq/freq_table.c + * + * Copyright (C) 2002 - 2003 Dominik Brodowski + */ + +#include +#include +#include +#include + +/********************************************************************* + * FREQUENCY TABLE HELPERS * + *********************************************************************/ + +int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table) +{ + unsigned int min_freq = ~0; + unsigned int max_freq = 0; + unsigned int i = 0; + + for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + unsigned int freq = table[i].frequency; + if (freq == CPUFREQ_ENTRY_INVALID) + continue; + if (freq < min_freq) + min_freq = freq; + if (freq > max_freq) + max_freq = freq; + } + + policy->min = policy->cpuinfo.min_freq = min_freq; + policy->max = policy->cpuinfo.max_freq = max_freq; + + if (policy->min == ~0) + return -EINVAL; + else + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo); + + +int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table) +{ + unsigned int next_larger = ~0; + unsigned int i = 0; + unsigned int count = 0; + + if (!cpu_online(policy->cpu)) + return -EINVAL; + + cpufreq_verify_within_limits(policy, + policy->cpuinfo.min_freq, + policy->cpuinfo.max_freq); + + for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + unsigned int freq = table[i].frequency; + if (freq == CPUFREQ_ENTRY_INVALID) + continue; + if ((freq >= policy->min) && (freq <= policy->max)) + count++; + else if ((next_larger > freq) && (freq > policy->max)) + next_larger = freq; + } + + if (!count) + policy->max = next_larger; + + cpufreq_verify_within_limits(policy, + policy->cpuinfo.min_freq, + policy->cpuinfo.max_freq); + + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify); + + +int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + unsigned int *index) +{ + struct cpufreq_frequency_table optimal = { .index = ~0, }; + unsigned int i; + + switch (policy->policy) { + case CPUFREQ_POLICY_PERFORMANCE: + optimal.frequency = 0; + break; + case CPUFREQ_POLICY_POWERSAVE: + optimal.frequency = ~0; + break; + } + + if (!cpu_online(policy->cpu)) + return -EINVAL; + + for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + unsigned int freq = table[i].frequency; + if (freq == CPUFREQ_ENTRY_INVALID) + continue; + if ((freq < policy->min) || (freq > policy->max)) + continue; + switch(policy->policy) { + case CPUFREQ_POLICY_PERFORMANCE: + if (optimal.frequency <= freq) { + optimal.frequency = freq; + optimal.index = i; + } + break; + case CPUFREQ_POLICY_POWERSAVE: + if (optimal.frequency >= freq) { + optimal.frequency = freq; + optimal.index = i; + } + break; + } + } + if (optimal.index > i) + return -EINVAL; + + *index = optimal.index; + + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy); + + +int cpufreq_frequency_table_target(struct cpufreq_policy *policy, + struct cpufreq_frequency_table *table, + unsigned int target_freq, + unsigned int relation, + unsigned int *index) +{ + struct cpufreq_frequency_table optimal = { .index = ~0, }; + struct cpufreq_frequency_table suboptimal = { .index = ~0, }; + unsigned int i; + + switch (relation) { + case CPUFREQ_RELATION_H: + optimal.frequency = 0; + suboptimal.frequency = ~0; + break; + case CPUFREQ_RELATION_L: + optimal.frequency = ~0; + suboptimal.frequency = 0; + break; + } + + if (!cpu_online(policy->cpu)) + return -EINVAL; + + for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + unsigned int freq = table[i].frequency; + if (freq == CPUFREQ_ENTRY_INVALID) + continue; + if ((freq < policy->min) || (freq > policy->max)) + continue; + switch(relation) { + case CPUFREQ_RELATION_H: + if (freq <= target_freq) { + if (freq >= optimal.frequency) { + optimal.frequency = freq; + optimal.index = i; + } + } else { + if (freq <= suboptimal.frequency) { + suboptimal.frequency = freq; + suboptimal.index = i; + } + } + break; + case CPUFREQ_RELATION_L: + if (freq >= target_freq) { + if (freq <= optimal.frequency) { + optimal.frequency = freq; + optimal.index = i; + } + } else { + if (freq >= suboptimal.frequency) { + suboptimal.frequency = freq; + suboptimal.index = i; + } + } + break; + } + } + if (optimal.index > i) { + if (suboptimal.index > i) + return -EINVAL; + *index = suboptimal.index; + } else + *index = optimal.index; + + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target); + + +MODULE_AUTHOR ("Dominik Brodowski "); +MODULE_DESCRIPTION ("CPUfreq frequency table helpers"); +MODULE_LICENSE ("GPL"); diff -ruN linux-original/include/linux/cpufreq.h linux/include/linux/cpufreq.h --- linux-original/include/linux/cpufreq.h 2003-02-15 10:13:30.000000000 +0100 +++ linux/include/linux/cpufreq.h 2003-02-15 10:15:00.000000000 +0100 @@ -297,6 +297,7 @@ #endif /* CONFIG_CPU_FREQ_24_API */ +#if defined(CONFIG_CPU_FREQ_TABLE) || defined(CONFIG_CPU_FREQ_TABLE_MODULE) /********************************************************************* * FREQUENCY TABLE HELPERS * *********************************************************************/ @@ -326,4 +327,6 @@ unsigned int relation, unsigned int *index); +#endif /* CONFIG_CPU_FREQ_TABLE */ + #endif /* _LINUX_CPUFREQ_H */ diff -ruN linux-original/kernel/cpufreq.c linux/kernel/cpufreq.c --- linux-original/kernel/cpufreq.c 2003-02-15 10:13:53.000000000 +0100 +++ linux/kernel/cpufreq.c 2003-02-15 10:15:00.000000000 +0100 @@ -1582,191 +1582,3 @@ #else #define cpufreq_restore() do {} while (0) #endif /* CONFIG_PM */ - - -/********************************************************************* - * FREQUENCY TABLE HELPERS * - *********************************************************************/ - -int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table) -{ - unsigned int min_freq = ~0; - unsigned int max_freq = 0; - unsigned int i = 0; - - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { - unsigned int freq = table[i].frequency; - if (freq == CPUFREQ_ENTRY_INVALID) - continue; - if (freq < min_freq) - min_freq = freq; - if (freq > max_freq) - max_freq = freq; - } - - policy->min = policy->cpuinfo.min_freq = min_freq; - policy->max = policy->cpuinfo.max_freq = max_freq; - - if (policy->min == ~0) - return -EINVAL; - else - return 0; -} -EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo); - - -int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table) -{ - unsigned int next_larger = ~0; - unsigned int i = 0; - unsigned int count = 0; - - if (!cpu_online(policy->cpu)) - return -EINVAL; - - cpufreq_verify_within_limits(policy, - policy->cpuinfo.min_freq, - policy->cpuinfo.max_freq); - - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { - unsigned int freq = table[i].frequency; - if (freq == CPUFREQ_ENTRY_INVALID) - continue; - if ((freq >= policy->min) && (freq <= policy->max)) - count++; - else if ((next_larger > freq) && (freq > policy->max)) - next_larger = freq; - } - - if (!count) - policy->max = next_larger; - - cpufreq_verify_within_limits(policy, - policy->cpuinfo.min_freq, - policy->cpuinfo.max_freq); - - return 0; -} -EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify); - - -int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table, - unsigned int *index) -{ - struct cpufreq_frequency_table optimal = { .index = ~0, }; - unsigned int i; - - switch (policy->policy) { - case CPUFREQ_POLICY_PERFORMANCE: - optimal.frequency = 0; - break; - case CPUFREQ_POLICY_POWERSAVE: - optimal.frequency = ~0; - break; - } - - if (!cpu_online(policy->cpu)) - return -EINVAL; - - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { - unsigned int freq = table[i].frequency; - if (freq == CPUFREQ_ENTRY_INVALID) - continue; - if ((freq < policy->min) || (freq > policy->max)) - continue; - switch(policy->policy) { - case CPUFREQ_POLICY_PERFORMANCE: - if (optimal.frequency <= freq) { - optimal.frequency = freq; - optimal.index = i; - } - break; - case CPUFREQ_POLICY_POWERSAVE: - if (optimal.frequency >= freq) { - optimal.frequency = freq; - optimal.index = i; - } - break; - } - } - if (optimal.index > i) - return -EINVAL; - - *index = optimal.index; - - return 0; -} -EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy); - -int cpufreq_frequency_table_target(struct cpufreq_policy *policy, - struct cpufreq_frequency_table *table, - unsigned int target_freq, - unsigned int relation, - unsigned int *index) -{ - struct cpufreq_frequency_table optimal = { .index = ~0, }; - struct cpufreq_frequency_table suboptimal = { .index = ~0, }; - unsigned int i; - - switch (relation) { - case CPUFREQ_RELATION_H: - optimal.frequency = 0; - suboptimal.frequency = ~0; - break; - case CPUFREQ_RELATION_L: - optimal.frequency = ~0; - suboptimal.frequency = 0; - break; - } - - if (!cpu_online(policy->cpu)) - return -EINVAL; - - for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { - unsigned int freq = table[i].frequency; - if (freq == CPUFREQ_ENTRY_INVALID) - continue; - if ((freq < policy->min) || (freq > policy->max)) - continue; - switch(relation) { - case CPUFREQ_RELATION_H: - if (freq <= target_freq) { - if (freq >= optimal.frequency) { - optimal.frequency = freq; - optimal.index = i; - } - } else { - if (freq <= suboptimal.frequency) { - suboptimal.frequency = freq; - suboptimal.index = i; - } - } - break; - case CPUFREQ_RELATION_L: - if (freq >= target_freq) { - if (freq <= optimal.frequency) { - optimal.frequency = freq; - optimal.index = i; - } - } else { - if (freq >= suboptimal.frequency) { - suboptimal.frequency = freq; - suboptimal.index = i; - } - } - break; - } - } - if (optimal.index > i) { - if (suboptimal.index > i) - return -EINVAL; - *index = suboptimal.index; - } else - *index = optimal.index; - - return 0; -} -EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at 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