1#ifndef __ACPI_PROCESSOR_H 2#define __ACPI_PROCESSOR_H 3 4#include <linux/kernel.h> 5#include <linux/cpu.h> 6#include <linux/thermal.h> 7#include <asm/acpi.h> 8 9#define ACPI_PROCESSOR_CLASS "processor" 10#define ACPI_PROCESSOR_DEVICE_NAME "Processor" 11#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" 12 13#define ACPI_PROCESSOR_BUSY_METRIC 10 14 15#define ACPI_PROCESSOR_MAX_POWER 8 16#define ACPI_PROCESSOR_MAX_C2_LATENCY 100 17#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 18 19#define ACPI_PROCESSOR_MAX_THROTTLING 16 20#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ 21#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 22 23#define ACPI_PDC_REVISION_ID 0x1 24 25#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 26#define ACPI_PSD_REV0_ENTRIES 5 27 28#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 29#define ACPI_TSD_REV0_ENTRIES 5 30/* 31 * Types of coordination defined in ACPI 3.0. Same macros can be used across 32 * P, C and T states 33 */ 34#define DOMAIN_COORD_TYPE_SW_ALL 0xfc 35#define DOMAIN_COORD_TYPE_SW_ANY 0xfd 36#define DOMAIN_COORD_TYPE_HW_ALL 0xfe 37 38#define ACPI_CSTATE_SYSTEMIO 0 39#define ACPI_CSTATE_FFH 1 40#define ACPI_CSTATE_HALT 2 41 42#define ACPI_CX_DESC_LEN 32 43 44/* Power Management */ 45 46struct acpi_processor_cx; 47 48struct acpi_power_register { 49 u8 descriptor; 50 u16 length; 51 u8 space_id; 52 u8 bit_width; 53 u8 bit_offset; 54 u8 access_size; 55 u64 address; 56} __packed; 57 58struct acpi_processor_cx { 59 u8 valid; 60 u8 type; 61 u32 address; 62 u8 entry_method; 63 u8 index; 64 u32 latency; 65 u8 bm_sts_skip; 66 char desc[ACPI_CX_DESC_LEN]; 67}; 68 69struct acpi_processor_power { 70 int count; 71 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; 72 int timer_broadcast_on_state; 73}; 74 75/* Performance Management */ 76 77struct acpi_psd_package { 78 u64 num_entries; 79 u64 revision; 80 u64 domain; 81 u64 coord_type; 82 u64 num_processors; 83} __packed; 84 85struct acpi_pct_register { 86 u8 descriptor; 87 u16 length; 88 u8 space_id; 89 u8 bit_width; 90 u8 bit_offset; 91 u8 reserved; 92 u64 address; 93} __packed; 94 95struct acpi_processor_px { 96 u64 core_frequency; /* megahertz */ 97 u64 power; /* milliWatts */ 98 u64 transition_latency; /* microseconds */ 99 u64 bus_master_latency; /* microseconds */ 100 u64 control; /* control value */ 101 u64 status; /* success indicator */ 102}; 103 104struct acpi_processor_performance { 105 unsigned int state; 106 unsigned int platform_limit; 107 struct acpi_pct_register control_register; 108 struct acpi_pct_register status_register; 109 unsigned int state_count; 110 struct acpi_processor_px *states; 111 struct acpi_psd_package domain_info; 112 cpumask_var_t shared_cpu_map; 113 unsigned int shared_type; 114}; 115 116/* Throttling Control */ 117 118struct acpi_tsd_package { 119 u64 num_entries; 120 u64 revision; 121 u64 domain; 122 u64 coord_type; 123 u64 num_processors; 124} __packed; 125 126struct acpi_ptc_register { 127 u8 descriptor; 128 u16 length; 129 u8 space_id; 130 u8 bit_width; 131 u8 bit_offset; 132 u8 reserved; 133 u64 address; 134} __packed; 135 136struct acpi_processor_tx_tss { 137 u64 freqpercentage; /* */ 138 u64 power; /* milliWatts */ 139 u64 transition_latency; /* microseconds */ 140 u64 control; /* control value */ 141 u64 status; /* success indicator */ 142}; 143struct acpi_processor_tx { 144 u16 power; 145 u16 performance; 146}; 147 148struct acpi_processor; 149struct acpi_processor_throttling { 150 unsigned int state; 151 unsigned int platform_limit; 152 struct acpi_pct_register control_register; 153 struct acpi_pct_register status_register; 154 unsigned int state_count; 155 struct acpi_processor_tx_tss *states_tss; 156 struct acpi_tsd_package domain_info; 157 cpumask_var_t shared_cpu_map; 158 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); 159 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, 160 int state, bool force); 161 162 u32 address; 163 u8 duty_offset; 164 u8 duty_width; 165 u8 tsd_valid_flag; 166 unsigned int shared_type; 167 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; 168}; 169 170/* Limit Interface */ 171 172struct acpi_processor_lx { 173 int px; /* performance state */ 174 int tx; /* throttle level */ 175}; 176 177struct acpi_processor_limit { 178 struct acpi_processor_lx state; /* current limit */ 179 struct acpi_processor_lx thermal; /* thermal limit */ 180 struct acpi_processor_lx user; /* user limit */ 181}; 182 183struct acpi_processor_flags { 184 u8 power:1; 185 u8 performance:1; 186 u8 throttling:1; 187 u8 limit:1; 188 u8 bm_control:1; 189 u8 bm_check:1; 190 u8 has_cst:1; 191 u8 power_setup_done:1; 192 u8 bm_rld_set:1; 193 u8 need_hotplug_init:1; 194}; 195 196struct acpi_processor { 197 acpi_handle handle; 198 u32 acpi_id; 199 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */ 200 u32 id; /* CPU logical ID allocated by OS */ 201 u32 pblk; 202 int performance_platform_limit; 203 int throttling_platform_limit; 204 /* 0 - states 0..n-th state available */ 205 206 struct acpi_processor_flags flags; 207 struct acpi_processor_power power; 208 struct acpi_processor_performance *performance; 209 struct acpi_processor_throttling throttling; 210 struct acpi_processor_limit limit; 211 struct thermal_cooling_device *cdev; 212 struct device *dev; /* Processor device. */ 213}; 214 215struct acpi_processor_errata { 216 u8 smp; 217 struct { 218 u8 throttle:1; 219 u8 fdma:1; 220 u8 reserved:6; 221 u32 bmisx; 222 } piix4; 223}; 224 225extern int acpi_processor_preregister_performance(struct 226 acpi_processor_performance 227 __percpu *performance); 228 229extern int acpi_processor_register_performance(struct acpi_processor_performance 230 *performance, unsigned int cpu); 231extern void acpi_processor_unregister_performance(struct 232 acpi_processor_performance 233 *performance, 234 unsigned int cpu); 235 236/* note: this locks both the calling module and the processor module 237 if a _PPC object exists, rmmod is disallowed then */ 238int acpi_processor_notify_smm(struct module *calling_module); 239 240/* parsing the _P* objects. */ 241extern int acpi_processor_get_performance_info(struct acpi_processor *pr); 242 243/* for communication between multiple parts of the processor kernel module */ 244DECLARE_PER_CPU(struct acpi_processor *, processors); 245extern struct acpi_processor_errata errata; 246 247#ifdef ARCH_HAS_POWER_INIT 248void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 249 unsigned int cpu); 250int acpi_processor_ffh_cstate_probe(unsigned int cpu, 251 struct acpi_processor_cx *cx, 252 struct acpi_power_register *reg); 253void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 254#else 255static inline void acpi_processor_power_init_bm_check(struct 256 acpi_processor_flags 257 *flags, unsigned int cpu) 258{ 259 flags->bm_check = 1; 260 return; 261} 262static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 263 struct acpi_processor_cx *cx, 264 struct acpi_power_register 265 *reg) 266{ 267 return -1; 268} 269static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 270 *cstate) 271{ 272 return; 273} 274#endif 275 276/* in processor_perflib.c */ 277 278#ifdef CONFIG_CPU_FREQ 279void acpi_processor_ppc_init(void); 280void acpi_processor_ppc_exit(void); 281int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); 282extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); 283#else 284static inline void acpi_processor_ppc_init(void) 285{ 286 return; 287} 288static inline void acpi_processor_ppc_exit(void) 289{ 290 return; 291} 292static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr, 293 int event_flag) 294{ 295 static unsigned int printout = 1; 296 if (printout) { 297 printk(KERN_WARNING 298 "Warning: Processor Platform Limit event detected, but not handled.\n"); 299 printk(KERN_WARNING 300 "Consider compiling CPUfreq support into your kernel.\n"); 301 printout = 0; 302 } 303 return 0; 304} 305static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) 306{ 307 return -ENODEV; 308} 309 310#endif /* CONFIG_CPU_FREQ */ 311 312/* in processor_core.c */ 313phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); 314int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); 315int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); 316 317/* in processor_pdc.c */ 318void acpi_processor_set_pdc(acpi_handle handle); 319 320/* in processor_throttling.c */ 321int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 322int acpi_processor_get_throttling_info(struct acpi_processor *pr); 323extern int acpi_processor_set_throttling(struct acpi_processor *pr, 324 int state, bool force); 325/* 326 * Reevaluate whether the T-state is invalid after one cpu is 327 * onlined/offlined. In such case the flags.throttling will be updated. 328 */ 329extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 330 unsigned long action); 331extern const struct file_operations acpi_processor_throttling_fops; 332extern void acpi_processor_throttling_init(void); 333/* in processor_idle.c */ 334int acpi_processor_power_init(struct acpi_processor *pr); 335int acpi_processor_power_exit(struct acpi_processor *pr); 336int acpi_processor_cst_has_changed(struct acpi_processor *pr); 337int acpi_processor_hotplug(struct acpi_processor *pr); 338extern struct cpuidle_driver acpi_idle_driver; 339 340#ifdef CONFIG_PM_SLEEP 341void acpi_processor_syscore_init(void); 342void acpi_processor_syscore_exit(void); 343#else 344static inline void acpi_processor_syscore_init(void) {} 345static inline void acpi_processor_syscore_exit(void) {} 346#endif 347 348/* in processor_thermal.c */ 349int acpi_processor_get_limit_info(struct acpi_processor *pr); 350extern const struct thermal_cooling_device_ops processor_cooling_ops; 351#ifdef CONFIG_CPU_FREQ 352void acpi_thermal_cpufreq_init(void); 353void acpi_thermal_cpufreq_exit(void); 354#else 355static inline void acpi_thermal_cpufreq_init(void) 356{ 357 return; 358} 359static inline void acpi_thermal_cpufreq_exit(void) 360{ 361 return; 362} 363#endif 364 365#endif 366