02df8b9385
http://bugzilla.kernel.org/show_bug.cgi?id=4401 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
266 lines
6.4 KiB
C
266 lines
6.4 KiB
C
#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];
|
|
|
|
/* the _PDC objects passed by the driver, if any */
|
|
struct acpi_object_list *pdc;
|
|
};
|
|
|
|
/* 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;
|
|
|
|
/* the _PDC objects passed by the driver, if any */
|
|
struct acpi_object_list *pdc;
|
|
};
|
|
|
|
|
|
|
|
/* 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;
|
|
};
|
|
|
|
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;
|
|
|
|
int acpi_processor_set_pdc(struct acpi_processor *pr,
|
|
struct acpi_object_list *pdc_in);
|
|
|
|
#ifdef ARCH_HAS_POWER_PDC_INIT
|
|
void acpi_processor_power_init_pdc(struct acpi_processor_power *pow,
|
|
unsigned int cpu);
|
|
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
|
|
unsigned int cpu);
|
|
#else
|
|
static inline void acpi_processor_power_init_pdc(
|
|
struct acpi_processor_power *pow, unsigned int cpu)
|
|
{
|
|
pow->pdc = NULL;
|
|
return;
|
|
}
|
|
|
|
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);
|
|
ssize_t acpi_processor_write_throttling (
|
|
struct file *file,
|
|
const char __user *buffer,
|
|
size_t count,
|
|
loff_t *data);
|
|
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);
|
|
ssize_t acpi_processor_write_limit (
|
|
struct file *file,
|
|
const char __user *buffer,
|
|
size_t count,
|
|
loff_t *data);
|
|
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
|