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@@ -11,71 +11,36 @@
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#ifndef _LINUX_CPUFREQ_H
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#define _LINUX_CPUFREQ_H
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-#include <asm/cputime.h>
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-#include <linux/mutex.h>
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-#include <linux/notifier.h>
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-#include <linux/threads.h>
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+#include <linux/cpumask.h>
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+#include <linux/completion.h>
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#include <linux/kobject.h>
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+#include <linux/notifier.h>
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#include <linux/sysfs.h>
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-#include <linux/completion.h>
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-#include <linux/workqueue.h>
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-#include <linux/cpumask.h>
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-#include <asm/div64.h>
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-
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-#define CPUFREQ_NAME_LEN 16
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-/* Print length for names. Extra 1 space for accomodating '\n' in prints */
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-#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
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/*********************************************************************
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- * CPUFREQ NOTIFIER INTERFACE *
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+ * CPUFREQ INTERFACE *
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*********************************************************************/
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-
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-#define CPUFREQ_TRANSITION_NOTIFIER (0)
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-#define CPUFREQ_POLICY_NOTIFIER (1)
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-
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-#ifdef CONFIG_CPU_FREQ
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-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
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-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
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-extern void disable_cpufreq(void);
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-#else /* CONFIG_CPU_FREQ */
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-static inline int cpufreq_register_notifier(struct notifier_block *nb,
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- unsigned int list)
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-{
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- return 0;
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-}
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-static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
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- unsigned int list)
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-{
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- return 0;
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-}
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-static inline void disable_cpufreq(void) { }
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-#endif /* CONFIG_CPU_FREQ */
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-
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-/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
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- * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
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- * two generic policies are available:
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- */
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-
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-#define CPUFREQ_POLICY_POWERSAVE (1)
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-#define CPUFREQ_POLICY_PERFORMANCE (2)
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-
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-/* Frequency values here are CPU kHz so that hardware which doesn't run
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- * with some frequencies can complain without having to guess what per
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- * cent / per mille means.
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+/*
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+ * Frequency values here are CPU kHz
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+ *
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* Maximum transition latency is in nanoseconds - if it's unknown,
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* CPUFREQ_ETERNAL shall be used.
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*/
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+#define CPUFREQ_ETERNAL (-1)
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+#define CPUFREQ_NAME_LEN 16
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+/* Print length for names. Extra 1 space for accomodating '\n' in prints */
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+#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
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+
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struct cpufreq_governor;
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-/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
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-extern struct kobject *cpufreq_global_kobject;
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-int cpufreq_get_global_kobject(void);
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-void cpufreq_put_global_kobject(void);
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-int cpufreq_sysfs_create_file(const struct attribute *attr);
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-void cpufreq_sysfs_remove_file(const struct attribute *attr);
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+struct cpufreq_freqs {
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+ unsigned int cpu; /* cpu nr */
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+ unsigned int old;
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+ unsigned int new;
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+ u8 flags; /* flags of cpufreq_driver, see below. */
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+};
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-#define CPUFREQ_ETERNAL (-1)
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struct cpufreq_cpuinfo {
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unsigned int max_freq;
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unsigned int min_freq;
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@@ -117,123 +82,103 @@ struct cpufreq_policy {
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struct cpufreq_real_policy user_policy;
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+ struct list_head policy_list;
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struct kobject kobj;
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struct completion kobj_unregister;
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int transition_ongoing; /* Tracks transition status */
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};
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-#define CPUFREQ_ADJUST (0)
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-#define CPUFREQ_INCOMPATIBLE (1)
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-#define CPUFREQ_NOTIFY (2)
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-#define CPUFREQ_START (3)
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-#define CPUFREQ_UPDATE_POLICY_CPU (4)
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-
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/* Only for ACPI */
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#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
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#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
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#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
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#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
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+struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
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+void cpufreq_cpu_put(struct cpufreq_policy *policy);
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+
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static inline bool policy_is_shared(struct cpufreq_policy *policy)
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{
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return cpumask_weight(policy->cpus) > 1;
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}
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-/******************** cpufreq transition notifiers *******************/
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-
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-#define CPUFREQ_PRECHANGE (0)
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-#define CPUFREQ_POSTCHANGE (1)
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-#define CPUFREQ_RESUMECHANGE (8)
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-#define CPUFREQ_SUSPENDCHANGE (9)
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+/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
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+extern struct kobject *cpufreq_global_kobject;
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+int cpufreq_get_global_kobject(void);
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+void cpufreq_put_global_kobject(void);
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+int cpufreq_sysfs_create_file(const struct attribute *attr);
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+void cpufreq_sysfs_remove_file(const struct attribute *attr);
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-struct cpufreq_freqs {
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- unsigned int cpu; /* cpu nr */
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- unsigned int old;
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- unsigned int new;
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- u8 flags; /* flags of cpufreq_driver, see below. */
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-};
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+#ifdef CONFIG_CPU_FREQ
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+unsigned int cpufreq_get(unsigned int cpu);
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+unsigned int cpufreq_quick_get(unsigned int cpu);
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+unsigned int cpufreq_quick_get_max(unsigned int cpu);
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+void disable_cpufreq(void);
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-/**
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- * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
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- * safe)
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- * @old: old value
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- * @div: divisor
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- * @mult: multiplier
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- *
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- *
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- * new = old * mult / div
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- */
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-static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
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- u_int mult)
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+u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
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+int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
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+int cpufreq_update_policy(unsigned int cpu);
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+bool have_governor_per_policy(void);
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+struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
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+#else
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+static inline unsigned int cpufreq_get(unsigned int cpu)
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{
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-#if BITS_PER_LONG == 32
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-
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- u64 result = ((u64) old) * ((u64) mult);
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- do_div(result, div);
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- return (unsigned long) result;
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-
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-#elif BITS_PER_LONG == 64
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-
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- unsigned long result = old * ((u64) mult);
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- result /= div;
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- return result;
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-
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+ return 0;
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+}
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+static inline unsigned int cpufreq_quick_get(unsigned int cpu)
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+{
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+ return 0;
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+}
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+static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
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+{
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+ return 0;
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+}
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+static inline void disable_cpufreq(void) { }
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#endif
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-};
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/*********************************************************************
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- * CPUFREQ GOVERNORS *
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+ * CPUFREQ DRIVER INTERFACE *
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*********************************************************************/
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-#define CPUFREQ_GOV_START 1
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-#define CPUFREQ_GOV_STOP 2
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-#define CPUFREQ_GOV_LIMITS 3
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-#define CPUFREQ_GOV_POLICY_INIT 4
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-#define CPUFREQ_GOV_POLICY_EXIT 5
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+#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
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+#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
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-struct cpufreq_governor {
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- char name[CPUFREQ_NAME_LEN];
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- int initialized;
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- int (*governor) (struct cpufreq_policy *policy,
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- unsigned int event);
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- ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
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- char *buf);
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- int (*store_setspeed) (struct cpufreq_policy *policy,
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- unsigned int freq);
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- unsigned int max_transition_latency; /* HW must be able to switch to
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- next freq faster than this value in nano secs or we
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- will fallback to performance governor */
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- struct list_head governor_list;
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- struct module *owner;
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+struct freq_attr {
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+ struct attribute attr;
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+ ssize_t (*show)(struct cpufreq_policy *, char *);
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+ ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
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};
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-/*
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- * Pass a target to the cpufreq driver.
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- */
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-extern int cpufreq_driver_target(struct cpufreq_policy *policy,
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- unsigned int target_freq,
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- unsigned int relation);
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-extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
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- unsigned int target_freq,
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- unsigned int relation);
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+#define cpufreq_freq_attr_ro(_name) \
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+static struct freq_attr _name = \
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+__ATTR(_name, 0444, show_##_name, NULL)
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-extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy,
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- unsigned int cpu);
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+#define cpufreq_freq_attr_ro_perm(_name, _perm) \
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+static struct freq_attr _name = \
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+__ATTR(_name, _perm, show_##_name, NULL)
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-int cpufreq_register_governor(struct cpufreq_governor *governor);
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-void cpufreq_unregister_governor(struct cpufreq_governor *governor);
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+#define cpufreq_freq_attr_rw(_name) \
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+static struct freq_attr _name = \
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+__ATTR(_name, 0644, show_##_name, store_##_name)
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-/*********************************************************************
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- * CPUFREQ DRIVER INTERFACE *
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- *********************************************************************/
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+struct global_attr {
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+ struct attribute attr;
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+ ssize_t (*show)(struct kobject *kobj,
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+ struct attribute *attr, char *buf);
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+ ssize_t (*store)(struct kobject *a, struct attribute *b,
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+ const char *c, size_t count);
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+};
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-#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
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-#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
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+#define define_one_global_ro(_name) \
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+static struct global_attr _name = \
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+__ATTR(_name, 0444, show_##_name, NULL)
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+
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+#define define_one_global_rw(_name) \
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+static struct global_attr _name = \
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+__ATTR(_name, 0644, show_##_name, store_##_name)
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-struct freq_attr;
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struct cpufreq_driver {
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- struct module *owner;
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char name[CPUFREQ_NAME_LEN];
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u8 flags;
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/*
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@@ -258,8 +203,6 @@ struct cpufreq_driver {
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unsigned int (*get) (unsigned int cpu);
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/* optional */
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- unsigned int (*getavg) (struct cpufreq_policy *policy,
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- unsigned int cpu);
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int (*bios_limit) (int cpu, unsigned int *limit);
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int (*exit) (struct cpufreq_policy *policy);
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@@ -269,7 +212,6 @@ struct cpufreq_driver {
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};
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/* flags */
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-
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#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
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* all ->init() calls failed */
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#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel
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@@ -281,8 +223,7 @@ struct cpufreq_driver {
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int cpufreq_register_driver(struct cpufreq_driver *driver_data);
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int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
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-void cpufreq_notify_transition(struct cpufreq_policy *policy,
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- struct cpufreq_freqs *freqs, unsigned int state);
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+const char *cpufreq_get_current_driver(void);
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static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
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unsigned int min, unsigned int max)
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@@ -300,86 +241,117 @@ static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
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return;
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}
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-struct freq_attr {
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- struct attribute attr;
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- ssize_t (*show)(struct cpufreq_policy *, char *);
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- ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
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-};
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-
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-#define cpufreq_freq_attr_ro(_name) \
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-static struct freq_attr _name = \
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-__ATTR(_name, 0444, show_##_name, NULL)
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-
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-#define cpufreq_freq_attr_ro_perm(_name, _perm) \
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-static struct freq_attr _name = \
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-__ATTR(_name, _perm, show_##_name, NULL)
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-
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-#define cpufreq_freq_attr_rw(_name) \
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-static struct freq_attr _name = \
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-__ATTR(_name, 0644, show_##_name, store_##_name)
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+/*********************************************************************
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+ * CPUFREQ NOTIFIER INTERFACE *
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+ *********************************************************************/
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-struct global_attr {
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- struct attribute attr;
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- ssize_t (*show)(struct kobject *kobj,
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- struct attribute *attr, char *buf);
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- ssize_t (*store)(struct kobject *a, struct attribute *b,
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- const char *c, size_t count);
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-};
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+#define CPUFREQ_TRANSITION_NOTIFIER (0)
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+#define CPUFREQ_POLICY_NOTIFIER (1)
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-#define define_one_global_ro(_name) \
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-static struct global_attr _name = \
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-__ATTR(_name, 0444, show_##_name, NULL)
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+/* Transition notifiers */
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+#define CPUFREQ_PRECHANGE (0)
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+#define CPUFREQ_POSTCHANGE (1)
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+#define CPUFREQ_RESUMECHANGE (8)
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+#define CPUFREQ_SUSPENDCHANGE (9)
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-#define define_one_global_rw(_name) \
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-static struct global_attr _name = \
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-__ATTR(_name, 0644, show_##_name, store_##_name)
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+/* Policy Notifiers */
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+#define CPUFREQ_ADJUST (0)
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+#define CPUFREQ_INCOMPATIBLE (1)
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+#define CPUFREQ_NOTIFY (2)
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+#define CPUFREQ_START (3)
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+#define CPUFREQ_UPDATE_POLICY_CPU (4)
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-struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
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-void cpufreq_cpu_put(struct cpufreq_policy *data);
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-const char *cpufreq_get_current_driver(void);
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+#ifdef CONFIG_CPU_FREQ
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+int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
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+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
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-/*********************************************************************
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- * CPUFREQ 2.6. INTERFACE *
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- *********************************************************************/
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-u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
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-int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
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-int cpufreq_update_policy(unsigned int cpu);
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-bool have_governor_per_policy(void);
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-struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
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+void cpufreq_notify_transition(struct cpufreq_policy *policy,
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+ struct cpufreq_freqs *freqs, unsigned int state);
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-#ifdef CONFIG_CPU_FREQ
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-/*
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- * query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it
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- */
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-unsigned int cpufreq_get(unsigned int cpu);
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-#else
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-static inline unsigned int cpufreq_get(unsigned int cpu)
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+#else /* CONFIG_CPU_FREQ */
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+static inline int cpufreq_register_notifier(struct notifier_block *nb,
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+ unsigned int list)
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{
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return 0;
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}
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-#endif
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-
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-/*
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- * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
|
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- */
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-#ifdef CONFIG_CPU_FREQ
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-unsigned int cpufreq_quick_get(unsigned int cpu);
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-unsigned int cpufreq_quick_get_max(unsigned int cpu);
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-#else
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-static inline unsigned int cpufreq_quick_get(unsigned int cpu)
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+static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
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|
+ unsigned int list)
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{
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return 0;
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}
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-static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
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+#endif /* !CONFIG_CPU_FREQ */
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+
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+/**
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+ * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
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|
+ * safe)
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+ * @old: old value
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+ * @div: divisor
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+ * @mult: multiplier
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+ *
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+ *
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+ * new = old * mult / div
|
|
|
+ */
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|
+static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
|
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|
+ u_int mult)
|
|
|
{
|
|
|
- return 0;
|
|
|
-}
|
|
|
+#if BITS_PER_LONG == 32
|
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|
+ u64 result = ((u64) old) * ((u64) mult);
|
|
|
+ do_div(result, div);
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|
|
+ return (unsigned long) result;
|
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|
+
|
|
|
+#elif BITS_PER_LONG == 64
|
|
|
+ unsigned long result = old * ((u64) mult);
|
|
|
+ result /= div;
|
|
|
+ return result;
|
|
|
#endif
|
|
|
+}
|
|
|
|
|
|
/*********************************************************************
|
|
|
- * CPUFREQ DEFAULT GOVERNOR *
|
|
|
+ * CPUFREQ GOVERNORS *
|
|
|
*********************************************************************/
|
|
|
|
|
|
+/*
|
|
|
+ * If (cpufreq_driver->target) exists, the ->governor decides what frequency
|
|
|
+ * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
|
|
|
+ * two generic policies are available:
|
|
|
+ */
|
|
|
+#define CPUFREQ_POLICY_POWERSAVE (1)
|
|
|
+#define CPUFREQ_POLICY_PERFORMANCE (2)
|
|
|
+
|
|
|
+/* Governor Events */
|
|
|
+#define CPUFREQ_GOV_START 1
|
|
|
+#define CPUFREQ_GOV_STOP 2
|
|
|
+#define CPUFREQ_GOV_LIMITS 3
|
|
|
+#define CPUFREQ_GOV_POLICY_INIT 4
|
|
|
+#define CPUFREQ_GOV_POLICY_EXIT 5
|
|
|
+
|
|
|
+struct cpufreq_governor {
|
|
|
+ char name[CPUFREQ_NAME_LEN];
|
|
|
+ int initialized;
|
|
|
+ int (*governor) (struct cpufreq_policy *policy,
|
|
|
+ unsigned int event);
|
|
|
+ ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
|
|
|
+ char *buf);
|
|
|
+ int (*store_setspeed) (struct cpufreq_policy *policy,
|
|
|
+ unsigned int freq);
|
|
|
+ unsigned int max_transition_latency; /* HW must be able to switch to
|
|
|
+ next freq faster than this value in nano secs or we
|
|
|
+ will fallback to performance governor */
|
|
|
+ struct list_head governor_list;
|
|
|
+ struct module *owner;
|
|
|
+};
|
|
|
+
|
|
|
+/* Pass a target to the cpufreq driver */
|
|
|
+int cpufreq_driver_target(struct cpufreq_policy *policy,
|
|
|
+ unsigned int target_freq,
|
|
|
+ unsigned int relation);
|
|
|
+int __cpufreq_driver_target(struct cpufreq_policy *policy,
|
|
|
+ unsigned int target_freq,
|
|
|
+ unsigned int relation);
|
|
|
+int cpufreq_register_governor(struct cpufreq_governor *governor);
|
|
|
+void cpufreq_unregister_governor(struct cpufreq_governor *governor);
|
|
|
+
|
|
|
+/* CPUFREQ DEFAULT GOVERNOR */
|
|
|
/*
|
|
|
* Performance governor is fallback governor if any other gov failed to auto
|
|
|
* load due latency restrictions
|
|
|
@@ -428,18 +400,16 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
|
|
|
unsigned int relation,
|
|
|
unsigned int *index);
|
|
|
|
|
|
-/* the following 3 funtions are for cpufreq core use only */
|
|
|
+void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
|
|
|
+ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
|
|
|
+
|
|
|
+/* the following funtion is for cpufreq core use only */
|
|
|
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
|
|
|
|
|
|
/* the following are really really optional */
|
|
|
extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
|
|
|
-
|
|
|
void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
|
|
|
unsigned int cpu);
|
|
|
-void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
|
|
|
-
|
|
|
void cpufreq_frequency_table_put_attr(unsigned int cpu);
|
|
|
|
|
|
-ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
|
|
|
-
|
|
|
#endif /* _LINUX_CPUFREQ_H */
|
Rafael J. Wysocki