[linux.git] / include / acpi / processor.h

#ifndef __ACPI_PROCESSOR_H
#define __ACPI_PROCESSOR_H

#include <linux/kernel.h>
#include <linux/config.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

/* Power Management */

struct acpi_processor_cx;

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

struct acpi_processor_cx_policy {
	u32 count;
	struct acpi_processor_cx *state;
	struct {
		u32 time;
		u32 ticks;
		u32 count;
		u32 bm;
	} threshold;
};

struct acpi_processor_cx {
	u8 valid;
	u8 type;
	u32 address;
	u32 latency;
	u32 latency_ticks;
	u32 power;
	u32 usage;
	struct acpi_processor_cx_policy promotion;
	struct acpi_processor_cx_policy demotion;
};

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

/* Performance Management */

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 {
	acpi_integer core_frequency;	/* megahertz */
	acpi_integer power;	/* milliWatts */
	acpi_integer transition_latency;	/* microseconds */
	acpi_integer bus_master_latency;	/* microseconds */
	acpi_integer control;	/* control value */
	acpi_integer 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;

};

/* Throttling Control */

struct acpi_processor_tx {
	u16 power;
	u16 performance;
};

struct acpi_processor_throttling {
	int state;
	u32 address;
	u8 duty_offset;
	u8 duty_width;
	int state_count;
	struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
};

/* Limit Interface */

struct acpi_processor_lx {
	int px;			/* performace 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;
};

struct acpi_processor {
	acpi_handle handle;
	u32 acpi_id;
	u32 id;
	u32 pblk;
	int performance_platform_limit;
	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;

	/* the _PDC objects for this processor, if any */
	struct acpi_object_list *pdc;
};

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

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 */
extern struct acpi_processor *processors[NR_CPUS];
extern struct acpi_processor_errata errata;

void arch_acpi_processor_init_pdc(struct acpi_processor *pr);

#ifdef ARCH_HAS_POWER_INIT
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
					unsigned int cpu);
#else
static inline void acpi_processor_power_init_bm_check(struct
						      acpi_processor_flags
						      *flags, unsigned int cpu)
{
	flags->bm_check = 1;
	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);
#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)
{
	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;
}
#endif				/* CONFIG_CPU_FREQ */

/* in processor_throttling.c */
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
extern struct file_operations acpi_processor_throttling_fops;

/* 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);

/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
extern struct file_operations acpi_processor_limit_fops;

#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
Commit	Line	Data
1da177e4 LT	1	#ifndef __ACPI_PROCESSOR_H
	2	#define __ACPI_PROCESSOR_H
	3
	4	#include <linux/kernel.h>
	5	#include <linux/config.h>
	6
02df8b93 VP	7	#include <asm/acpi.h>
02df8b93 VP	8
1da177e4 LT	9	#define ACPI_PROCESSOR_BUSY_METRIC 10
	10
	11	#define ACPI_PROCESSOR_MAX_POWER 8
	12	#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
	13	#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
	14
	15	#define ACPI_PROCESSOR_MAX_THROTTLING 16
	16	#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
	17	#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
	18
02df8b93 VP	19	#define ACPI_PDC_REVISION_ID 0x1
02df8b93 VP	20
1da177e4 LT	21	/* Power Management */
	22
	23	struct acpi_processor_cx;
	24
	25	struct acpi_power_register {
4be44fcd LB	26	u8 descriptor;
	27	u16 length;
	28	u8 space_id;
	29	u8 bit_width;
	30	u8 bit_offset;
	31	u8 reserved;
	32	u64 address;
1da177e4 LT	33	} __attribute__ ((packed));
1da177e4 LT	34
1da177e4	35	struct acpi_processor_cx_policy {
4be44fcd	36	u32 count;
1da177e4 LT	37	struct acpi_processor_cx *state;
1da177e4 LT	38	struct {
4be44fcd LB	39	u32 time;
	40	u32 ticks;
	41	u32 count;
	42	u32 bm;
	43	} threshold;
1da177e4 LT	44	};
	45
	46	struct acpi_processor_cx {
4be44fcd LB	47	u8 valid;
	48	u8 type;
	49	u32 address;
	50	u32 latency;
	51	u32 latency_ticks;
	52	u32 power;
	53	u32 usage;
1da177e4 LT	54	struct acpi_processor_cx_policy promotion;
	55	struct acpi_processor_cx_policy demotion;
	56	};
	57
	58	struct acpi_processor_power {
	59	struct acpi_processor_cx *state;
4be44fcd LB	60	unsigned long bm_check_timestamp;
	61	u32 default_state;
	62	u32 bm_activity;
	63	int count;
1da177e4 LT	64	struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
	65	};
	66
	67	/* Performance Management */
	68
	69	struct acpi_pct_register {
4be44fcd LB	70	u8 descriptor;
	71	u16 length;
	72	u8 space_id;
	73	u8 bit_width;
	74	u8 bit_offset;
	75	u8 reserved;
	76	u64 address;
1da177e4 LT	77	} __attribute__ ((packed));
	78
	79	struct acpi_processor_px {
4be44fcd LB	80	acpi_integer core_frequency; /* megahertz */
	81	acpi_integer power; /* milliWatts */
	82	acpi_integer transition_latency; /* microseconds */
	83	acpi_integer bus_master_latency; /* microseconds */
	84	acpi_integer control; /* control value */
	85	acpi_integer status; /* success indicator */
1da177e4 LT	86	};
1da177e4 LT	87
1da177e4	88	struct acpi_processor_performance {
4be44fcd LB	89	unsigned int state;
4be44fcd LB	90	unsigned int platform_limit;
1da177e4 LT	91	struct acpi_pct_register control_register;
1da177e4 LT	92	struct acpi_pct_register status_register;
4be44fcd	93	unsigned int state_count;
1da177e4 LT	94	struct acpi_processor_px *states;
1da177e4 LT	95
1da177e4 LT	96	};
1da177e4 LT	97
1da177e4 LT	98	/* Throttling Control */
	99
	100	struct acpi_processor_tx {
4be44fcd LB	101	u16 power;
4be44fcd LB	102	u16 performance;
1da177e4 LT	103	};
	104
	105	struct acpi_processor_throttling {
4be44fcd LB	106	int state;
	107	u32 address;
	108	u8 duty_offset;
	109	u8 duty_width;
	110	int state_count;
1da177e4 LT	111	struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
	112	};
	113
	114	/* Limit Interface */
	115
	116	struct acpi_processor_lx {
4be44fcd LB	117	int px; /* performace state */
4be44fcd LB	118	int tx; /* throttle level */
1da177e4 LT	119	};
	120
	121	struct acpi_processor_limit {
4be44fcd	122	struct acpi_processor_lx state; /* current limit */
1da177e4	123	struct acpi_processor_lx thermal; /* thermal limit */
4be44fcd	124	struct acpi_processor_lx user; /* user limit */
1da177e4 LT	125	};
1da177e4 LT	126
1da177e4	127	struct acpi_processor_flags {
4be44fcd LB	128	u8 power:1;
	129	u8 performance:1;
	130	u8 throttling:1;
	131	u8 limit:1;
	132	u8 bm_control:1;
	133	u8 bm_check:1;
	134	u8 has_cst:1;
	135	u8 power_setup_done:1;
1da177e4 LT	136	};
	137
	138	struct acpi_processor {
4be44fcd LB	139	acpi_handle handle;
	140	u32 acpi_id;
	141	u32 id;
	142	u32 pblk;
	143	int performance_platform_limit;
1da177e4 LT	144	struct acpi_processor_flags flags;
	145	struct acpi_processor_power power;
	146	struct acpi_processor_performance *performance;
	147	struct acpi_processor_throttling throttling;
	148	struct acpi_processor_limit limit;
05131ecc VP	149
	150	/* the _PDC objects for this processor, if any */
	151	struct acpi_object_list *pdc;
1da177e4 LT	152	};
	153
	154	struct acpi_processor_errata {
4be44fcd	155	u8 smp;
1da177e4	156	struct {
4be44fcd LB	157	u8 throttle:1;
	158	u8 fdma:1;
	159	u8 reserved:6;
	160	u32 bmisx;
	161	} piix4;
1da177e4 LT	162	};
1da177e4 LT	163
4be44fcd LB	164	extern int acpi_processor_register_performance(struct acpi_processor_performance
	165	*performance, unsigned int cpu);
	166	extern void acpi_processor_unregister_performance(struct
	167	acpi_processor_performance
	168	*performance,
	169	unsigned int cpu);
1da177e4 LT	170
	171	/* note: this locks both the calling module and the processor module
	172	if a _PPC object exists, rmmod is disallowed then */
	173	int acpi_processor_notify_smm(struct module *calling_module);
	174
1da177e4	175	/* for communication between multiple parts of the processor kernel module */
4be44fcd	176	extern struct acpi_processor *processors[NR_CPUS];
1da177e4 LT	177	extern struct acpi_processor_errata errata;
1da177e4 LT	178
05131ecc	179	void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
02df8b93	180
05131ecc	181	#ifdef ARCH_HAS_POWER_INIT
02df8b93	182	void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
4be44fcd	183	unsigned int cpu);
02df8b93	184	#else
4be44fcd LB	185	static inline void acpi_processor_power_init_bm_check(struct
	186	acpi_processor_flags
	187	*flags, unsigned int cpu)
02df8b93 VP	188	{
	189	flags->bm_check = 1;
	190	return;
	191	}
	192	#endif
	193
1da177e4	194	/* in processor_perflib.c */
02df8b93	195
1da177e4 LT	196	#ifdef CONFIG_CPU_FREQ
	197	void acpi_processor_ppc_init(void);
	198	void acpi_processor_ppc_exit(void);
	199	int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
	200	#else
4be44fcd LB	201	static inline void acpi_processor_ppc_init(void)
	202	{
	203	return;
	204	}
	205	static inline void acpi_processor_ppc_exit(void)
	206	{
	207	return;
	208	}
	209	static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
	210	{
1da177e4 LT	211	static unsigned int printout = 1;
1da177e4 LT	212	if (printout) {
4be44fcd LB	213	printk(KERN_WARNING
	214	"Warning: Processor Platform Limit event detected, but not handled.\n");
	215	printk(KERN_WARNING
	216	"Consider compiling CPUfreq support into your kernel.\n");
1da177e4 LT	217	printout = 0;
	218	}
	219	return 0;
	220	}
4be44fcd	221	#endif /* CONFIG_CPU_FREQ */
1da177e4 LT	222
1da177e4 LT	223	/* in processor_throttling.c */
4be44fcd LB	224	int acpi_processor_get_throttling_info(struct acpi_processor *pr);
4be44fcd LB	225	int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
1da177e4 LT	226	extern struct file_operations acpi_processor_throttling_fops;
	227
	228	/* in processor_idle.c */
4be44fcd LB	229	int acpi_processor_power_init(struct acpi_processor *pr,
	230	struct acpi_device *device);
	231	int acpi_processor_cst_has_changed(struct acpi_processor *pr);
	232	int acpi_processor_power_exit(struct acpi_processor *pr,
	233	struct acpi_device *device);
1da177e4 LT	234
1da177e4 LT	235	/* in processor_thermal.c */
4be44fcd	236	int acpi_processor_get_limit_info(struct acpi_processor *pr);
1da177e4 LT	237	extern struct file_operations acpi_processor_limit_fops;
	238
	239	#ifdef CONFIG_CPU_FREQ
	240	void acpi_thermal_cpufreq_init(void);
	241	void acpi_thermal_cpufreq_exit(void);
	242	#else
4be44fcd LB	243	static inline void acpi_thermal_cpufreq_init(void)
	244	{
	245	return;
	246	}
	247	static inline void acpi_thermal_cpufreq_exit(void)
	248	{
	249	return;
	250	}
1da177e4 LT	251	#endif
1da177e4 LT	252
1da177e4	253	#endif