include/acpi/processor.h - maze/linux - Git at Google

 #ifndef __ACPI_PROCESSOR_H
 #define __ACPI_PROCESSOR_H

 #include <linux/kernel.h>
 #include <linux/cpu.h>
 #include <linux/cpuidle.h>
 #include <linux/thermal.h>
 #include <asm/acpi.h>

 #define ACPI_PROCESSOR_BUSY_METRIC	10

 #define ACPI_PROCESSOR_MAX_POWER	8
 #define ACPI_PROCESSOR_MAX_C2_LATENCY	100
 #define ACPI_PROCESSOR_MAX_C3_LATENCY	1000

 #define ACPI_PROCESSOR_MAX_THROTTLING	16
 #define ACPI_PROCESSOR_MAX_THROTTLE	250	/* 25% */
 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH	4

 #define ACPI_PDC_REVISION_ID		0x1

 #define ACPI_PSD_REV0_REVISION		0	/* Support for _PSD as in ACPI 3.0 */
 #define ACPI_PSD_REV0_ENTRIES		5

 #define ACPI_TSD_REV0_REVISION		0	/* Support for _PSD as in ACPI 3.0 */
 #define ACPI_TSD_REV0_ENTRIES		5
 /*
  * Types of coordination defined in ACPI 3.0. Same macros can be used across
  * P, C and T states
  */
 #define DOMAIN_COORD_TYPE_SW_ALL	0xfc
 #define DOMAIN_COORD_TYPE_SW_ANY	0xfd
 #define DOMAIN_COORD_TYPE_HW_ALL	0xfe

 #define ACPI_CSTATE_SYSTEMIO	0
 #define ACPI_CSTATE_FFH		1
 #define ACPI_CSTATE_HALT	2

 #define ACPI_CX_DESC_LEN	32

 /* Power Management */

 struct acpi_processor_cx;

 struct acpi_power_register {
 	u8 descriptor;
 	u16 length;
 	u8 space_id;
 	u8 bit_width;
 	u8 bit_offset;
 	u8 access_size;
 	u64 address;
 } __attribute__ ((packed));

 struct acpi_processor_cx {
 	u8 valid;
 	u8 type;
 	u32 address;
 	u8 entry_method;
 	u8 index;
 	u32 latency;
 	u32 latency_ticks;
 	u32 power;
 	u32 usage;
 	u64 time;
 	u8 bm_sts_skip;
 	char desc[ACPI_CX_DESC_LEN];
 };

 struct acpi_processor_power {
 	struct cpuidle_device dev;
 	struct acpi_processor_cx *state;
 	unsigned long bm_check_timestamp;
 	u32 default_state;
 	int count;
 	struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
 	int timer_broadcast_on_state;
 };

 /* Performance Management */

 struct acpi_psd_package {
 	u64 num_entries;
 	u64 revision;
 	u64 domain;
 	u64 coord_type;
 	u64 num_processors;
 } __attribute__ ((packed));

 struct acpi_pct_register {
 	u8 descriptor;
 	u16 length;
 	u8 space_id;
 	u8 bit_width;
 	u8 bit_offset;
 	u8 reserved;
 	u64 address;
 } __attribute__ ((packed));

 struct acpi_processor_px {
 	u64 core_frequency;	/* megahertz */
 	u64 power;	/* milliWatts */
 	u64 transition_latency;	/* microseconds */
 	u64 bus_master_latency;	/* microseconds */
 	u64 control;	/* control value */
 	u64 status;	/* success indicator */
 };

 struct acpi_processor_performance {
 	unsigned int state;
 	unsigned int platform_limit;
 	struct acpi_pct_register control_register;
 	struct acpi_pct_register status_register;
 	unsigned int state_count;
 	struct acpi_processor_px *states;
 	struct acpi_psd_package domain_info;
 	cpumask_var_t shared_cpu_map;
 	unsigned int shared_type;
 };

 /* Throttling Control */

 struct acpi_tsd_package {
 	u64 num_entries;
 	u64 revision;
 	u64 domain;
 	u64 coord_type;
 	u64 num_processors;
 } __attribute__ ((packed));

 struct acpi_ptc_register {
 	u8 descriptor;
 	u16 length;
 	u8 space_id;
 	u8 bit_width;
 	u8 bit_offset;
 	u8 reserved;
 	u64 address;
 } __attribute__ ((packed));

 struct acpi_processor_tx_tss {
 	u64 freqpercentage;	/* */
 	u64 power;	/* milliWatts */
 	u64 transition_latency;	/* microseconds */
 	u64 control;	/* control value */
 	u64 status;	/* success indicator */
 };
 struct acpi_processor_tx {
 	u16 power;
 	u16 performance;
 };

 struct acpi_processor;
 struct acpi_processor_throttling {
 	unsigned int state;
 	unsigned int platform_limit;
 	struct acpi_pct_register control_register;
 	struct acpi_pct_register status_register;
 	unsigned int state_count;
 	struct acpi_processor_tx_tss *states_tss;
 	struct acpi_tsd_package domain_info;
 	cpumask_var_t shared_cpu_map;
 	int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
 	int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
 					      int state, bool force);

 	u32 address;
 	u8 duty_offset;
 	u8 duty_width;
 	u8 tsd_valid_flag;
 	unsigned int shared_type;
 	struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
 };

 /* Limit Interface */

 struct acpi_processor_lx {
 	int px;			/* performance state */
 	int tx;			/* throttle level */
 };

 struct acpi_processor_limit {
 	struct acpi_processor_lx state;	/* current limit */
 	struct acpi_processor_lx thermal;	/* thermal limit */
 	struct acpi_processor_lx user;	/* user limit */
 };

 struct acpi_processor_flags {
 	u8 power:1;
 	u8 performance:1;
 	u8 throttling:1;
 	u8 limit:1;
 	u8 bm_control:1;
 	u8 bm_check:1;
 	u8 has_cst:1;
 	u8 power_setup_done:1;
 	u8 bm_rld_set:1;
 };

 struct acpi_processor {
 	acpi_handle handle;
 	u32 acpi_id;
 	u32 id;
 	u32 pblk;
 	int performance_platform_limit;
 	int throttling_platform_limit;
 	/* 0 - states 0..n-th state available */

 	struct acpi_processor_flags flags;
 	struct acpi_processor_power power;
 	struct acpi_processor_performance *performance;
 	struct acpi_processor_throttling throttling;
 	struct acpi_processor_limit limit;
 	struct thermal_cooling_device *cdev;
 };

 struct acpi_processor_errata {
 	u8 smp;
 	struct {
 		u8 throttle:1;
 		u8 fdma:1;
 		u8 reserved:6;
 		u32 bmisx;
 	} piix4;
 };

 extern int acpi_processor_preregister_performance(struct
 						  acpi_processor_performance
 						  __percpu *performance);

 extern int acpi_processor_register_performance(struct acpi_processor_performance
 					       *performance, unsigned int cpu);
 extern void acpi_processor_unregister_performance(struct
 						  acpi_processor_performance
 						  *performance,
 						  unsigned int cpu);

 /* note: this locks both the calling module and the processor module
          if a _PPC object exists, rmmod is disallowed then */
 int acpi_processor_notify_smm(struct module *calling_module);

 /* for communication between multiple parts of the processor kernel module */
 DECLARE_PER_CPU(struct acpi_processor *, processors);
 extern struct acpi_processor_errata errata;

 #ifdef ARCH_HAS_POWER_INIT
 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 					unsigned int cpu);
 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 				    struct acpi_processor_cx *cx,
 				    struct acpi_power_register *reg);
 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
 #else
 static inline void acpi_processor_power_init_bm_check(struct
 						      acpi_processor_flags
 						      *flags, unsigned int cpu)
 {
 	flags->bm_check = 1;
 	return;
 }
 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 						  struct acpi_processor_cx *cx,
 						  struct acpi_power_register
 						  *reg)
 {
 	return -1;
 }
 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
 						   *cstate)
 {
 	return;
 }
 #endif

 /* in processor_perflib.c */

 #ifdef CONFIG_CPU_FREQ
 void acpi_processor_ppc_init(void);
 void acpi_processor_ppc_exit(void);
 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
 #else
 static inline void acpi_processor_ppc_init(void)
 {
 	return;
 }
 static inline void acpi_processor_ppc_exit(void)
 {
 	return;
 }
 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
 								int event_flag)
 {
 	static unsigned int printout = 1;
 	if (printout) {
 		printk(KERN_WARNING
 		       "Warning: Processor Platform Limit event detected, but not handled.\n");
 		printk(KERN_WARNING
 		       "Consider compiling CPUfreq support into your kernel.\n");
 		printout = 0;
 	}
 	return 0;
 }
 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
 {
 	return -ENODEV;
 }

 #endif				/* CONFIG_CPU_FREQ */

 /* in processor_core.c */
 void acpi_processor_set_pdc(acpi_handle handle);
 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);

 /* in processor_throttling.c */
 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
 					 int state, bool force);
 /*
  * Reevaluate whether the T-state is invalid after one cpu is
  * onlined/offlined. In such case the flags.throttling will be updated.
  */
 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
 			unsigned long action);
 extern const struct file_operations acpi_processor_throttling_fops;
 extern void acpi_processor_throttling_init(void);
 /* in processor_idle.c */
 int acpi_processor_power_init(struct acpi_processor *pr,
 			      struct acpi_device *device);
 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 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);
 extern const struct thermal_cooling_device_ops processor_cooling_ops;
 #ifdef CONFIG_CPU_FREQ
 void acpi_thermal_cpufreq_init(void);
 void acpi_thermal_cpufreq_exit(void);
 #else
 static inline void acpi_thermal_cpufreq_init(void)
 {
 	return;
 }
 static inline void acpi_thermal_cpufreq_exit(void)
 {
 	return;
 }
 #endif

 #endif
	#ifndef __ACPI_PROCESSOR_H
	#define __ACPI_PROCESSOR_H

	#include <linux/kernel.h>
	#include <linux/cpu.h>
	#include <linux/cpuidle.h>
	#include <linux/thermal.h>
	#include <asm/acpi.h>

	#define ACPI_PROCESSOR_BUSY_METRIC 10

	#define ACPI_PROCESSOR_MAX_POWER 8
	#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
	#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000

	#define ACPI_PROCESSOR_MAX_THROTTLING 16
	#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
	#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4

	#define ACPI_PDC_REVISION_ID 0x1

	#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
	#define ACPI_PSD_REV0_ENTRIES 5

	#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
	#define ACPI_TSD_REV0_ENTRIES 5
	/*
	* Types of coordination defined in ACPI 3.0. Same macros can be used across
	* P, C and T states
	*/
	#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
	#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
	#define DOMAIN_COORD_TYPE_HW_ALL 0xfe

	#define ACPI_CSTATE_SYSTEMIO 0
	#define ACPI_CSTATE_FFH 1
	#define ACPI_CSTATE_HALT 2

	#define ACPI_CX_DESC_LEN 32

	/* Power Management */

	struct acpi_processor_cx;

	struct acpi_power_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 access_size;
	u64 address;
	} __attribute__ ((packed));

	struct acpi_processor_cx {
	u8 valid;
	u8 type;
	u32 address;
	u8 entry_method;
	u8 index;
	u32 latency;
	u32 latency_ticks;
	u32 power;
	u32 usage;
	u64 time;
	u8 bm_sts_skip;
	char desc[ACPI_CX_DESC_LEN];
	};

	struct acpi_processor_power {
	struct cpuidle_device dev;
	struct acpi_processor_cx *state;
	unsigned long bm_check_timestamp;
	u32 default_state;
	int count;
	struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
	int timer_broadcast_on_state;
	};

	/* Performance Management */

	struct acpi_psd_package {
	u64 num_entries;
	u64 revision;
	u64 domain;
	u64 coord_type;
	u64 num_processors;
	} __attribute__ ((packed));

	struct acpi_pct_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 reserved;
	u64 address;
	} __attribute__ ((packed));

	struct acpi_processor_px {
	u64 core_frequency; /* megahertz */
	u64 power; /* milliWatts */
	u64 transition_latency; /* microseconds */
	u64 bus_master_latency; /* microseconds */
	u64 control; /* control value */
	u64 status; /* success indicator */
	};

	struct acpi_processor_performance {
	unsigned int state;
	unsigned int platform_limit;
	struct acpi_pct_register control_register;
	struct acpi_pct_register status_register;
	unsigned int state_count;
	struct acpi_processor_px *states;
	struct acpi_psd_package domain_info;
	cpumask_var_t shared_cpu_map;
	unsigned int shared_type;
	};

	/* Throttling Control */

	struct acpi_tsd_package {
	u64 num_entries;
	u64 revision;
	u64 domain;
	u64 coord_type;
	u64 num_processors;
	} __attribute__ ((packed));

	struct acpi_ptc_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 reserved;
	u64 address;
	} __attribute__ ((packed));

	struct acpi_processor_tx_tss {
	u64 freqpercentage; /* */
	u64 power; /* milliWatts */
	u64 transition_latency; /* microseconds */
	u64 control; /* control value */
	u64 status; /* success indicator */
	};
	struct acpi_processor_tx {
	u16 power;
	u16 performance;
	};

	struct acpi_processor;
	struct acpi_processor_throttling {
	unsigned int state;
	unsigned int platform_limit;
	struct acpi_pct_register control_register;
	struct acpi_pct_register status_register;
	unsigned int state_count;
	struct acpi_processor_tx_tss *states_tss;
	struct acpi_tsd_package domain_info;
	cpumask_var_t shared_cpu_map;
	int (acpi_processor_get_throttling) (struct acpi_processor pr);
	int (acpi_processor_set_throttling) (struct acpi_processor pr,
	int state, bool force);

	u32 address;
	u8 duty_offset;
	u8 duty_width;
	u8 tsd_valid_flag;
	unsigned int shared_type;
	struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
	};

	/* Limit Interface */

	struct acpi_processor_lx {
	int px; /* performance state */
	int tx; /* throttle level */
	};

	struct acpi_processor_limit {
	struct acpi_processor_lx state; /* current limit */
	struct acpi_processor_lx thermal; /* thermal limit */
	struct acpi_processor_lx user; /* user limit */
	};

	struct acpi_processor_flags {
	u8 power:1;
	u8 performance:1;
	u8 throttling:1;
	u8 limit:1;
	u8 bm_control:1;
	u8 bm_check:1;
	u8 has_cst:1;
	u8 power_setup_done:1;
	u8 bm_rld_set:1;
	};

	struct acpi_processor {
	acpi_handle handle;
	u32 acpi_id;
	u32 id;
	u32 pblk;
	int performance_platform_limit;
	int throttling_platform_limit;
	/* 0 - states 0..n-th state available */

	struct acpi_processor_flags flags;
	struct acpi_processor_power power;
	struct acpi_processor_performance *performance;
	struct acpi_processor_throttling throttling;
	struct acpi_processor_limit limit;
	struct thermal_cooling_device *cdev;
	};

	struct acpi_processor_errata {
	u8 smp;
	struct {
	u8 throttle:1;
	u8 fdma:1;
	u8 reserved:6;
	u32 bmisx;
	} piix4;
	};

	extern int acpi_processor_preregister_performance(struct
	acpi_processor_performance
	__percpu *performance);

	extern int acpi_processor_register_performance(struct acpi_processor_performance
	*performance, unsigned int cpu);
	extern void acpi_processor_unregister_performance(struct
	acpi_processor_performance
	*performance,
	unsigned int cpu);

	/* note: this locks both the calling module and the processor module
	if a _PPC object exists, rmmod is disallowed then */
	int acpi_processor_notify_smm(struct module *calling_module);

	/* for communication between multiple parts of the processor kernel module */
	DECLARE_PER_CPU(struct acpi_processor *, processors);
	extern struct acpi_processor_errata errata;

	#ifdef ARCH_HAS_POWER_INIT
	void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
	unsigned int cpu);
	int acpi_processor_ffh_cstate_probe(unsigned int cpu,
	struct acpi_processor_cx *cx,
	struct acpi_power_register *reg);
	void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
	#else
	static inline void acpi_processor_power_init_bm_check(struct
	acpi_processor_flags
	*flags, unsigned int cpu)
	{
	flags->bm_check = 1;
	return;
	}
	static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
	struct acpi_processor_cx *cx,
	struct acpi_power_register
	*reg)
	{
	return -1;
	}
	static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
	*cstate)
	{
	return;
	}
	#endif

	/* in processor_perflib.c */

	#ifdef CONFIG_CPU_FREQ
	void acpi_processor_ppc_init(void);
	void acpi_processor_ppc_exit(void);
	int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
	extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
	#else
	static inline void acpi_processor_ppc_init(void)
	{
	return;
	}
	static inline void acpi_processor_ppc_exit(void)
	{
	return;
	}
	static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
	int event_flag)
	{
	static unsigned int printout = 1;
	if (printout) {
	printk(KERN_WARNING
	"Warning: Processor Platform Limit event detected, but not handled.\n");
	printk(KERN_WARNING
	"Consider compiling CPUfreq support into your kernel.\n");
	printout = 0;
	}
	return 0;
	}
	static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
	{
	return -ENODEV;
	}

	#endif /* CONFIG_CPU_FREQ */

	/* in processor_core.c */
	void acpi_processor_set_pdc(acpi_handle handle);
	int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);

	/* in processor_throttling.c */
	int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
	int acpi_processor_get_throttling_info(struct acpi_processor *pr);
	extern int acpi_processor_set_throttling(struct acpi_processor *pr,
	int state, bool force);
	/*
	* Reevaluate whether the T-state is invalid after one cpu is
	* onlined/offlined. In such case the flags.throttling will be updated.
	*/
	extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
	unsigned long action);
	extern const struct file_operations acpi_processor_throttling_fops;
	extern void acpi_processor_throttling_init(void);
	/* in processor_idle.c */
	int acpi_processor_power_init(struct acpi_processor *pr,
	struct acpi_device *device);
	int acpi_processor_cst_has_changed(struct acpi_processor *pr);
	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);
	extern const struct thermal_cooling_device_ops processor_cooling_ops;
	#ifdef CONFIG_CPU_FREQ
	void acpi_thermal_cpufreq_init(void);
	void acpi_thermal_cpufreq_exit(void);
	#else
	static inline void acpi_thermal_cpufreq_init(void)
	{
	return;
	}
	static inline void acpi_thermal_cpufreq_exit(void)
	{
	return;
	}
	#endif

	#endif