diff options
Diffstat (limited to 'include/acpi/processor.h')
| -rw-r--r-- | include/acpi/processor.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/include/acpi/processor.h b/include/acpi/processor.h new file mode 100644 index 000000000000..2f50a5bb0c78 --- /dev/null +++ b/include/acpi/processor.h @@ -0,0 +1,235 @@ +#ifndef __ACPI_PROCESSOR_H +#define __ACPI_PROCESSOR_H + +#include <linux/kernel.h> +#include <linux/config.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 + +/* 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 */ +}; + +#define ACPI_PDC_REVISION_ID 0x1 + +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; + +/* 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 |