4 files changed, 194 insertions, 26 deletions

diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 99934a999e66..26d79f6db8a0 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -3,6 +3,7 @@
 
 #include <linux/kernel.h>
 #include <linux/cpu.h>
+#include <linux/cpuidle.h>
 
 #include <asm/acpi.h>
 
@@ -75,7 +76,9 @@ struct acpi_processor_cx {
 };
 
 struct acpi_processor_power {
+        struct cpuidle_device dev;
         struct acpi_processor_cx *state;
+        struct acpi_processor_cx *bm_state;
         unsigned long bm_check_timestamp;
         u32 default_state;
         u32 bm_activity;
@@ -199,6 +202,7 @@ struct acpi_processor_flags {
         u8 bm_check:1;
         u8 has_cst:1;
         u8 power_setup_done:1;
+        u8 bm_rld_set:1;
 };
 
 struct acpi_processor {
@@ -322,6 +326,7 @@ int acpi_processor_power_exit(struct acpi_processor *pr,
                               struct acpi_device *device);
 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
 int acpi_processor_resume(struct acpi_device * device);
+extern struct cpuidle_driver acpi_idle_driver;
 
 /* in processor_thermal.c */
 int acpi_processor_get_limit_info(struct acpi_processor *pr);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index bf5e0009de75..8ccedf7a0a5a 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -189,32 +189,6 @@ extern int ec_transaction(u8 command,
 extern int acpi_blacklisted(void);
 extern void acpi_bios_year(char *s);
 
-#define ACPI_CSTATE_LIMIT_DEFINED       /* for driver builds */
-#ifdef  CONFIG_ACPI
-
-/*
- * Set highest legal C-state
- * 0: C0 okay, but not C1
- * 1: C1 okay, but not C2
- * 2: C2 okay, but not C3 etc.
- */
-
-extern unsigned int max_cstate;
-
-static inline unsigned int acpi_get_cstate_limit(void)
-{
-        return max_cstate;
-}
-static inline void acpi_set_cstate_limit(unsigned int new_limit)
-{
-        max_cstate = new_limit;
-        return;
-}
-#else
-static inline unsigned int acpi_get_cstate_limit(void) { return 0; }
-static inline void acpi_set_cstate_limit(unsigned int new_limit) { return; }
-#endif
-
 #ifdef CONFIG_ACPI_NUMA
 int acpi_get_pxm(acpi_handle handle);
 int acpi_get_node(acpi_handle *handle);
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
new file mode 100644
index 000000000000..16a51546db44
--- /dev/null
+++ b/include/linux/cpuidle.h
@@ -0,0 +1,180 @@
+/*
+ * cpuidle.h - a generic framework for CPU idle power management
+ *
+ * (C) 2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+ *          Shaohua Li <shaohua.li@intel.com>
+ *          Adam Belay <abelay@novell.com>
+ *
+ * This code is licenced under the GPL.
+ */
+
+#ifndef _LINUX_CPUIDLE_H
+#define _LINUX_CPUIDLE_H
+
+#include <linux/percpu.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+#include <linux/completion.h>
+
+#define CPUIDLE_STATE_MAX       8
+#define CPUIDLE_NAME_LEN        16
+
+struct cpuidle_device;
+
+
+/****************************
+ * CPUIDLE DEVICE INTERFACE *
+ ****************************/
+
+struct cpuidle_state {
+        char            name[CPUIDLE_NAME_LEN];
+        void            *driver_data;
+
+        unsigned int    flags;
+        unsigned int    exit_latency; /* in US */
+        unsigned int    power_usage; /* in mW */
+        unsigned int    target_residency; /* in US */
+
+        unsigned int    usage;
+        unsigned int    time; /* in US */
+
+        int (*enter)    (struct cpuidle_device *dev,
+                         struct cpuidle_state *state);
+};
+
+/* Idle State Flags */
+#define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */
+#define CPUIDLE_FLAG_CHECK_BM   (0x02) /* BM activity will exit state */
+#define CPUIDLE_FLAG_SHALLOW    (0x10) /* low latency, minimal savings */
+#define CPUIDLE_FLAG_BALANCED   (0x20) /* medium latency, moderate savings */
+#define CPUIDLE_FLAG_DEEP       (0x40) /* high latency, large savings */
+
+#define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
+
+/**
+ * cpuidle_get_statedata - retrieves private driver state data
+ * @state: the state
+ */
+static inline void * cpuidle_get_statedata(struct cpuidle_state *state)
+{
+        return state->driver_data;
+}
+
+/**
+ * cpuidle_set_statedata - stores private driver state data
+ * @state: the state
+ * @data: the private data
+ */
+static inline void
+cpuidle_set_statedata(struct cpuidle_state *state, void *data)
+{
+        state->driver_data = data;
+}
+
+struct cpuidle_state_kobj {
+        struct cpuidle_state *state;
+        struct completion kobj_unregister;
+        struct kobject kobj;
+};
+
+struct cpuidle_device {
+        int                     enabled:1;
+        unsigned int            cpu;
+
+        int                     last_residency;
+        int                     state_count;
+        struct cpuidle_state    states[CPUIDLE_STATE_MAX];
+        struct cpuidle_state_kobj *kobjs[CPUIDLE_STATE_MAX];
+        struct cpuidle_state    *last_state;
+
+        struct list_head        device_list;
+        struct kobject          kobj;
+        struct completion       kobj_unregister;
+        void                    *governor_data;
+};
+
+DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
+
+/**
+ * cpuidle_get_last_residency - retrieves the last state's residency time
+ * @dev: the target CPU
+ *
+ * NOTE: this value is invalid if CPUIDLE_FLAG_TIME_VALID isn't set
+ */
+static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
+{
+        return dev->last_residency;
+}
+
+
+/****************************
+ * CPUIDLE DRIVER INTERFACE *
+ ****************************/
+
+struct cpuidle_driver {
+        char                    name[CPUIDLE_NAME_LEN];
+        struct module           *owner;
+};
+
+#ifdef CONFIG_CPU_IDLE
+
+extern int cpuidle_register_driver(struct cpuidle_driver *drv);
+extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
+extern int cpuidle_register_device(struct cpuidle_device *dev);
+extern void cpuidle_unregister_device(struct cpuidle_device *dev);
+
+extern void cpuidle_pause_and_lock(void);
+extern void cpuidle_resume_and_unlock(void);
+extern int cpuidle_enable_device(struct cpuidle_device *dev);
+extern void cpuidle_disable_device(struct cpuidle_device *dev);
+
+#else
+
+static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
+{return 0;}
+static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
+static inline int cpuidle_register_device(struct cpuidle_device *dev)
+{return 0;}
+static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
+
+static inline void cpuidle_pause_and_lock(void) { }
+static inline void cpuidle_resume_and_unlock(void) { }
+static inline int cpuidle_enable_device(struct cpuidle_device *dev)
+{return 0;}
+static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
+
+#endif
+
+/******************************
+ * CPUIDLE GOVERNOR INTERFACE *
+ ******************************/
+
+struct cpuidle_governor {
+        char                    name[CPUIDLE_NAME_LEN];
+        struct list_head        governor_list;
+        unsigned int            rating;
+
+        int  (*enable)          (struct cpuidle_device *dev);
+        void (*disable)         (struct cpuidle_device *dev);
+
+        int  (*select)          (struct cpuidle_device *dev);
+        void (*reflect)         (struct cpuidle_device *dev);
+
+        struct module           *owner;
+};
+
+#ifdef CONFIG_CPU_IDLE
+
+extern int cpuidle_register_governor(struct cpuidle_governor *gov);
+extern void cpuidle_unregister_governor(struct cpuidle_governor *gov);
+
+#else
+
+static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
+{return 0;}
+static inline void cpuidle_unregister_governor(struct cpuidle_governor *gov) { }
+
+#endif
+
+#endif /* _LINUX_CPUIDLE_H */
diff --git a/include/linux/tick.h b/include/linux/tick.h
index 9a7252e089b9..f4a1395e05ff 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -40,6 +40,7 @@ enum tick_nohz_mode {
  * @idle_sleeps:        Number of idle calls, where the sched tick was stopped
  * @idle_entrytime:     Time when the idle call was entered
  * @idle_sleeptime:     Sum of the time slept in idle with sched tick stopped
+ * @sleep_length:       Duration of the current idle sleep
  */
 struct tick_sched {
         struct hrtimer                  sched_timer;
@@ -52,6 +53,7 @@ struct tick_sched {
         unsigned long                   idle_sleeps;
         ktime_t                         idle_entrytime;
         ktime_t                         idle_sleeptime;
+        ktime_t                         sleep_length;
         unsigned long                   last_jiffies;
         unsigned long                   next_jiffies;
         ktime_t                         idle_expires;
@@ -100,10 +102,17 @@ static inline int tick_check_oneshot_change(int allow_nohz) { return 0; }
 extern void tick_nohz_stop_sched_tick(void);
 extern void tick_nohz_restart_sched_tick(void);
 extern void tick_nohz_update_jiffies(void);
+extern ktime_t tick_nohz_get_sleep_length(void);
 # else
 static inline void tick_nohz_stop_sched_tick(void) { }
 static inline void tick_nohz_restart_sched_tick(void) { }
 static inline void tick_nohz_update_jiffies(void) { }
+static inline ktime_t tick_nohz_get_sleep_length(void)
+{
+        ktime_t len = { .tv64 = NSEC_PER_SEC/HZ };
+
+        return len;
+}
 # endif /* !NO_HZ */
 
 #endif