cpuidle: extend cpuidle and menu governor to handle dynamic states

[sfrench/cifs-2.6.git] / include / linux / cpuidle.h

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 51e6b1e520e6feeaefaf71d692be486a128d1d22..36ca9721a0c28a0150b05153b4f442d2c558d6d4 100644 (file)
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -52,6 +52,7 @@ struct cpuidle_state {
 #define CPUIDLE_FLAG_SHALLOW   (0x20) /* low latency, minimal savings */
 #define CPUIDLE_FLAG_BALANCED  (0x40) /* medium latency, moderate savings */
 #define CPUIDLE_FLAG_DEEP      (0x80) /* high latency, large savings */
+#define CPUIDLE_FLAG_IGNORE    (0x100) /* ignore during this idle period */
 
 #define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
 
@@ -82,7 +83,9 @@ struct cpuidle_state_kobj {
 };
 
 struct cpuidle_device {
+       unsigned int            registered:1;
        unsigned int            enabled:1;
+       unsigned int            power_specified:1;
        unsigned int            cpu;
 
        int                     last_residency;
@@ -96,6 +99,8 @@ struct cpuidle_device {
        struct completion       kobj_unregister;
        void                    *governor_data;
        struct cpuidle_state    *safe_state;
+
+       int (*prepare)          (struct cpuidle_device *dev);
 };
 
 DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
@@ -124,6 +129,7 @@ struct cpuidle_driver {
 #ifdef CONFIG_CPU_IDLE
 
 extern int cpuidle_register_driver(struct cpuidle_driver *drv);
+struct cpuidle_driver *cpuidle_get_driver(void);
 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);
@@ -136,16 +142,17 @@ extern void cpuidle_disable_device(struct cpuidle_device *dev);
 #else
 
 static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
-{return 0;}
+{return -ENODEV; }
+static inline struct cpuidle_driver *cpuidle_get_driver(void) {return NULL; }
 static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
 static inline int cpuidle_register_device(struct cpuidle_device *dev)
-{return 0;}
+{return -ENODEV; }
 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;}
+{return -ENODEV; }
 static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
 
 #endif