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>
265 lines
6.4 KiB
C
265 lines
6.4 KiB
C
#ifndef __ACPI_PROCESSOR_H
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#define __ACPI_PROCESSOR_H
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#include <linux/kernel.h>
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#include <linux/config.h>
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#include <asm/acpi.h>
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#define ACPI_PROCESSOR_BUSY_METRIC 10
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#define ACPI_PROCESSOR_MAX_POWER 8
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#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
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#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
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#define ACPI_PROCESSOR_MAX_THROTTLING 16
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#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
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#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
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#define ACPI_PDC_REVISION_ID 0x1
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/* Power Management */
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struct acpi_processor_cx;
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struct acpi_power_register {
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u8 descriptor;
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u16 length;
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u8 space_id;
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u8 bit_width;
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u8 bit_offset;
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u8 reserved;
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u64 address;
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} __attribute__ ((packed));
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struct acpi_processor_cx_policy {
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u32 count;
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struct acpi_processor_cx *state;
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struct {
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u32 time;
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u32 ticks;
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u32 count;
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u32 bm;
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} threshold;
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};
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struct acpi_processor_cx {
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u8 valid;
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u8 type;
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u32 address;
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u32 latency;
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u32 latency_ticks;
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u32 power;
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u32 usage;
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struct acpi_processor_cx_policy promotion;
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struct acpi_processor_cx_policy demotion;
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};
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struct acpi_processor_power {
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struct acpi_processor_cx *state;
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unsigned long bm_check_timestamp;
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u32 default_state;
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u32 bm_activity;
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int count;
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struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
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/* the _PDC objects passed by the driver, if any */
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struct acpi_object_list *pdc;
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};
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/* Performance Management */
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struct acpi_pct_register {
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u8 descriptor;
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u16 length;
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u8 space_id;
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u8 bit_width;
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u8 bit_offset;
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u8 reserved;
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u64 address;
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} __attribute__ ((packed));
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struct acpi_processor_px {
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acpi_integer core_frequency; /* megahertz */
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acpi_integer power; /* milliWatts */
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acpi_integer transition_latency; /* microseconds */
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acpi_integer bus_master_latency; /* microseconds */
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acpi_integer control; /* control value */
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acpi_integer status; /* success indicator */
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};
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struct acpi_processor_performance {
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unsigned int state;
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unsigned int platform_limit;
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struct acpi_pct_register control_register;
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struct acpi_pct_register status_register;
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unsigned int state_count;
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struct acpi_processor_px *states;
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/* the _PDC objects passed by the driver, if any */
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struct acpi_object_list *pdc;
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};
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/* Throttling Control */
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struct acpi_processor_tx {
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u16 power;
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u16 performance;
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};
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struct acpi_processor_throttling {
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int state;
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u32 address;
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u8 duty_offset;
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u8 duty_width;
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int state_count;
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struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
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};
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/* Limit Interface */
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struct acpi_processor_lx {
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int px; /* performace state */
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int tx; /* throttle level */
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};
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struct acpi_processor_limit {
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struct acpi_processor_lx state; /* current limit */
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struct acpi_processor_lx thermal; /* thermal limit */
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struct acpi_processor_lx user; /* user limit */
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};
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struct acpi_processor_flags {
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u8 power:1;
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u8 performance:1;
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u8 throttling:1;
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u8 limit:1;
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u8 bm_control:1;
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u8 bm_check:1;
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u8 has_cst:1;
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u8 power_setup_done:1;
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};
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struct acpi_processor {
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acpi_handle handle;
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u32 acpi_id;
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u32 id;
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u32 pblk;
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int performance_platform_limit;
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struct acpi_processor_flags flags;
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struct acpi_processor_power power;
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struct acpi_processor_performance *performance;
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struct acpi_processor_throttling throttling;
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struct acpi_processor_limit limit;
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};
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struct acpi_processor_errata {
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u8 smp;
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struct {
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u8 throttle:1;
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u8 fdma:1;
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u8 reserved:6;
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u32 bmisx;
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} piix4;
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};
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extern int acpi_processor_register_performance (
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struct acpi_processor_performance * performance,
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unsigned int cpu);
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extern void acpi_processor_unregister_performance (
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struct acpi_processor_performance * performance,
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unsigned int cpu);
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/* note: this locks both the calling module and the processor module
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if a _PPC object exists, rmmod is disallowed then */
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int acpi_processor_notify_smm(struct module *calling_module);
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/* for communication between multiple parts of the processor kernel module */
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extern struct acpi_processor *processors[NR_CPUS];
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extern struct acpi_processor_errata errata;
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int acpi_processor_set_pdc(struct acpi_processor *pr,
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struct acpi_object_list *pdc_in);
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#ifdef ARCH_HAS_POWER_PDC_INIT
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void acpi_processor_power_init_pdc(struct acpi_processor_power *pow,
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unsigned int cpu);
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void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
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unsigned int cpu);
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#else
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static inline void acpi_processor_power_init_pdc(
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struct acpi_processor_power *pow, unsigned int cpu)
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{
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pow->pdc = NULL;
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return;
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}
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static inline void acpi_processor_power_init_bm_check(
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struct acpi_processor_flags *flags, unsigned int cpu)
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{
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flags->bm_check = 1;
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return;
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}
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#endif
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/* in processor_perflib.c */
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#ifdef CONFIG_CPU_FREQ
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void acpi_processor_ppc_init(void);
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void acpi_processor_ppc_exit(void);
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int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
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#else
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static inline void acpi_processor_ppc_init(void) { return; }
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static inline void acpi_processor_ppc_exit(void) { return; }
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static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) {
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static unsigned int printout = 1;
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if (printout) {
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printk(KERN_WARNING "Warning: Processor Platform Limit event detected, but not handled.\n");
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printk(KERN_WARNING "Consider compiling CPUfreq support into your kernel.\n");
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printout = 0;
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}
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return 0;
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}
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#endif /* CONFIG_CPU_FREQ */
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/* in processor_throttling.c */
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int acpi_processor_get_throttling_info (struct acpi_processor *pr);
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int acpi_processor_set_throttling (struct acpi_processor *pr, int state);
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ssize_t acpi_processor_write_throttling (
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struct file *file,
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const char __user *buffer,
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size_t count,
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loff_t *data);
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extern struct file_operations acpi_processor_throttling_fops;
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/* in processor_idle.c */
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int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *device);
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int acpi_processor_cst_has_changed (struct acpi_processor *pr);
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int acpi_processor_power_exit(struct acpi_processor *pr, struct acpi_device *device);
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/* in processor_thermal.c */
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int acpi_processor_get_limit_info (struct acpi_processor *pr);
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ssize_t acpi_processor_write_limit (
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struct file *file,
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const char __user *buffer,
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size_t count,
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loff_t *data);
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extern struct file_operations acpi_processor_limit_fops;
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#ifdef CONFIG_CPU_FREQ
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void acpi_thermal_cpufreq_init(void);
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void acpi_thermal_cpufreq_exit(void);
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#else
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static inline void acpi_thermal_cpufreq_init(void) { return; }
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static inline void acpi_thermal_cpufreq_exit(void) { return; }
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#endif
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#endif
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