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(unsigned int cpu); 232 233/* note: this locks both the calling module and the processor module 234 if a _PPC object exists, rmmod is disallowed then */ 235int acpi_processor_notify_smm(struct module *calling_module); 236 237/* parsing the _P* objects. */ 238extern int acpi_processor_get_performance_info(struct acpi_processor *pr); 239 240/* for communication between multiple parts of the processor kernel module */ 241DECLARE_PER_CPU(struct acpi_processor *, processors); 242extern struct acpi_processor_errata errata; 243 244#ifdef ARCH_HAS_POWER_INIT 245void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 246 unsigned int cpu); 247int acpi_processor_ffh_cstate_probe(unsigned int cpu, 248 struct acpi_processor_cx *cx, 249 struct acpi_power_register *reg); 250void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 251#else 252static inline void acpi_processor_power_init_bm_check(struct 253 acpi_processor_flags 254 *flags, unsigned int cpu) 255{ 256 flags->bm_check = 1; 257 return; 258} 259static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 260 struct acpi_processor_cx *cx, 261 struct acpi_power_register 262 *reg) 263{ 264 return -1; 265} 266static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 267 *cstate) 268{ 269 return; 270} 271#endif 272 273/* in processor_perflib.c */ 274 275#ifdef CONFIG_CPU_FREQ 276void acpi_processor_ppc_init(void); 277void acpi_processor_ppc_exit(void); 278int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); 279extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); 280#else 281static inline void acpi_processor_ppc_init(void) 282{ 283 return; 284} 285static inline void acpi_processor_ppc_exit(void) 286{ 287 return; 288} 289static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr, 290 int event_flag) 291{ 292 static unsigned int printout = 1; 293 if (printout) { 294 printk(KERN_WARNING 295 "Warning: Processor Platform Limit event detected, but not handled.\n"); 296 printk(KERN_WARNING 297 "Consider compiling CPUfreq support into your kernel.\n"); 298 printout = 0; 299 } 300 return 0; 301} 302static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) 303{ 304 return -ENODEV; 305} 306 307#endif /* CONFIG_CPU_FREQ */ 308 309/* in processor_core.c */ 310phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); 311int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); 312int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); 313 314#ifdef CONFIG_ACPI_CPPC_LIB 315extern int acpi_cppc_processor_probe(struct acpi_processor *pr); 316extern void acpi_cppc_processor_exit(struct acpi_processor *pr); 317#else 318static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) 319{ 320 return 0; 321} 322static inline void acpi_cppc_processor_exit(struct acpi_processor *pr) 323{ 324 return; 325} 326#endif /* CONFIG_ACPI_CPPC_LIB */ 327 328/* in processor_pdc.c */ 329void acpi_processor_set_pdc(acpi_handle handle); 330 331/* in processor_throttling.c */ 332#ifdef CONFIG_ACPI_CPU_FREQ_PSS 333int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 334int acpi_processor_get_throttling_info(struct acpi_processor *pr); 335extern int acpi_processor_set_throttling(struct acpi_processor *pr, 336 int state, bool force); 337/* 338 * Reevaluate whether the T-state is invalid after one cpu is 339 * onlined/offlined. In such case the flags.throttling will be updated. 340 */ 341extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 342 unsigned long action); 343extern const struct file_operations acpi_processor_throttling_fops; 344extern void acpi_processor_throttling_init(void); 345#else 346static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr) 347{ 348 return 0; 349} 350 351static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr) 352{ 353 return -ENODEV; 354} 355 356static inline int acpi_processor_set_throttling(struct acpi_processor *pr, 357 int state, bool force) 358{ 359 return -ENODEV; 360} 361 362static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 363 unsigned long action) {} 364 365static inline void acpi_processor_throttling_init(void) {} 366#endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 367 368/* in processor_idle.c */ 369extern struct cpuidle_driver acpi_idle_driver; 370#ifdef CONFIG_ACPI_PROCESSOR_IDLE 371int acpi_processor_power_init(struct acpi_processor *pr); 372int acpi_processor_power_exit(struct acpi_processor *pr); 373int acpi_processor_cst_has_changed(struct acpi_processor *pr); 374int acpi_processor_hotplug(struct acpi_processor *pr); 375#else 376static inline int acpi_processor_power_init(struct acpi_processor *pr) 377{ 378 return -ENODEV; 379} 380 381static inline int acpi_processor_power_exit(struct acpi_processor *pr) 382{ 383 return -ENODEV; 384} 385 386static inline int acpi_processor_cst_has_changed(struct acpi_processor *pr) 387{ 388 return -ENODEV; 389} 390 391static inline int acpi_processor_hotplug(struct acpi_processor *pr) 392{ 393 return -ENODEV; 394} 395#endif /* CONFIG_ACPI_PROCESSOR_IDLE */ 396 397#if defined(CONFIG_PM_SLEEP) & defined(CONFIG_ACPI_PROCESSOR_IDLE) 398void acpi_processor_syscore_init(void); 399void acpi_processor_syscore_exit(void); 400#else 401static inline void acpi_processor_syscore_init(void) {} 402static inline void acpi_processor_syscore_exit(void) {} 403#endif 404 405/* in processor_thermal.c */ 406int acpi_processor_get_limit_info(struct acpi_processor *pr); 407extern const struct thermal_cooling_device_ops processor_cooling_ops; 408#if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ) 409void acpi_thermal_cpufreq_init(void); 410void acpi_thermal_cpufreq_exit(void); 411#else 412static inline void acpi_thermal_cpufreq_init(void) 413{ 414 return; 415} 416static inline void acpi_thermal_cpufreq_exit(void) 417{ 418 return; 419} 420#endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 421 422#endif 423