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 #define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010" 13 14 #define ACPI_PROCESSOR_BUSY_METRIC 10 15 16 #define ACPI_PROCESSOR_MAX_POWER 8 17 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 18 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 19 20 #define ACPI_PROCESSOR_MAX_THROTTLING 16 21 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ 22 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 23 24 #define ACPI_PDC_REVISION_ID 0x1 25 26 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 27 #define ACPI_PSD_REV0_ENTRIES 5 28 29 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 30 #define ACPI_TSD_REV0_ENTRIES 5 31 /* 32 * Types of coordination defined in ACPI 3.0. Same macros can be used across 33 * P, C and T states 34 */ 35 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc 36 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd 37 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe 38 39 #define ACPI_CSTATE_SYSTEMIO 0 40 #define ACPI_CSTATE_FFH 1 41 #define ACPI_CSTATE_HALT 2 42 #define ACPI_CSTATE_INTEGER 3 43 44 #define ACPI_CX_DESC_LEN 32 45 46 /* Power Management */ 47 48 struct acpi_processor_cx; 49 50 struct acpi_power_register { 51 u8 descriptor; 52 u16 length; 53 u8 space_id; 54 u8 bit_width; 55 u8 bit_offset; 56 u8 access_size; 57 u64 address; 58 } __packed; 59 60 struct acpi_processor_cx { 61 u8 valid; 62 u8 type; 63 u32 address; 64 u8 entry_method; 65 u8 index; 66 u32 latency; 67 u8 bm_sts_skip; 68 char desc[ACPI_CX_DESC_LEN]; 69 }; 70 71 struct acpi_lpi_state { 72 u32 min_residency; 73 u32 wake_latency; /* worst case */ 74 u32 flags; 75 u32 arch_flags; 76 u32 res_cnt_freq; 77 u32 enable_parent_state; 78 u64 address; 79 u8 index; 80 u8 entry_method; 81 char desc[ACPI_CX_DESC_LEN]; 82 }; 83 84 struct acpi_processor_power { 85 int count; 86 union { 87 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; 88 struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER]; 89 }; 90 int timer_broadcast_on_state; 91 }; 92 93 /* Performance Management */ 94 95 struct acpi_psd_package { 96 u64 num_entries; 97 u64 revision; 98 u64 domain; 99 u64 coord_type; 100 u64 num_processors; 101 } __packed; 102 103 struct acpi_pct_register { 104 u8 descriptor; 105 u16 length; 106 u8 space_id; 107 u8 bit_width; 108 u8 bit_offset; 109 u8 reserved; 110 u64 address; 111 } __packed; 112 113 struct acpi_processor_px { 114 u64 core_frequency; /* megahertz */ 115 u64 power; /* milliWatts */ 116 u64 transition_latency; /* microseconds */ 117 u64 bus_master_latency; /* microseconds */ 118 u64 control; /* control value */ 119 u64 status; /* success indicator */ 120 }; 121 122 struct acpi_processor_performance { 123 unsigned int state; 124 unsigned int platform_limit; 125 struct acpi_pct_register control_register; 126 struct acpi_pct_register status_register; 127 unsigned int state_count; 128 struct acpi_processor_px *states; 129 struct acpi_psd_package domain_info; 130 cpumask_var_t shared_cpu_map; 131 unsigned int shared_type; 132 }; 133 134 /* Throttling Control */ 135 136 struct acpi_tsd_package { 137 u64 num_entries; 138 u64 revision; 139 u64 domain; 140 u64 coord_type; 141 u64 num_processors; 142 } __packed; 143 144 struct acpi_ptc_register { 145 u8 descriptor; 146 u16 length; 147 u8 space_id; 148 u8 bit_width; 149 u8 bit_offset; 150 u8 reserved; 151 u64 address; 152 } __packed; 153 154 struct acpi_processor_tx_tss { 155 u64 freqpercentage; /* */ 156 u64 power; /* milliWatts */ 157 u64 transition_latency; /* microseconds */ 158 u64 control; /* control value */ 159 u64 status; /* success indicator */ 160 }; 161 struct acpi_processor_tx { 162 u16 power; 163 u16 performance; 164 }; 165 166 struct acpi_processor; 167 struct acpi_processor_throttling { 168 unsigned int state; 169 unsigned int platform_limit; 170 struct acpi_pct_register control_register; 171 struct acpi_pct_register status_register; 172 unsigned int state_count; 173 struct acpi_processor_tx_tss *states_tss; 174 struct acpi_tsd_package domain_info; 175 cpumask_var_t shared_cpu_map; 176 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); 177 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, 178 int state, bool force); 179 180 u32 address; 181 u8 duty_offset; 182 u8 duty_width; 183 u8 tsd_valid_flag; 184 unsigned int shared_type; 185 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; 186 }; 187 188 /* Limit Interface */ 189 190 struct acpi_processor_lx { 191 int px; /* performance state */ 192 int tx; /* throttle level */ 193 }; 194 195 struct acpi_processor_limit { 196 struct acpi_processor_lx state; /* current limit */ 197 struct acpi_processor_lx thermal; /* thermal limit */ 198 struct acpi_processor_lx user; /* user limit */ 199 }; 200 201 struct acpi_processor_flags { 202 u8 power:1; 203 u8 performance:1; 204 u8 throttling:1; 205 u8 limit:1; 206 u8 bm_control:1; 207 u8 bm_check:1; 208 u8 has_cst:1; 209 u8 has_lpi:1; 210 u8 power_setup_done:1; 211 u8 bm_rld_set:1; 212 u8 need_hotplug_init:1; 213 }; 214 215 struct acpi_processor { 216 acpi_handle handle; 217 u32 acpi_id; 218 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */ 219 u32 id; /* CPU logical ID allocated by OS */ 220 u32 pblk; 221 int performance_platform_limit; 222 int throttling_platform_limit; 223 /* 0 - states 0..n-th state available */ 224 225 struct acpi_processor_flags flags; 226 struct acpi_processor_power power; 227 struct acpi_processor_performance *performance; 228 struct acpi_processor_throttling throttling; 229 struct acpi_processor_limit limit; 230 struct thermal_cooling_device *cdev; 231 struct device *dev; /* Processor device. */ 232 }; 233 234 struct acpi_processor_errata { 235 u8 smp; 236 struct { 237 u8 throttle:1; 238 u8 fdma:1; 239 u8 reserved:6; 240 u32 bmisx; 241 } piix4; 242 }; 243 244 extern int acpi_processor_preregister_performance(struct 245 acpi_processor_performance 246 __percpu *performance); 247 248 extern int acpi_processor_register_performance(struct acpi_processor_performance 249 *performance, unsigned int cpu); 250 extern void acpi_processor_unregister_performance(unsigned int cpu); 251 252 int acpi_processor_pstate_control(void); 253 /* note: this locks both the calling module and the processor module 254 if a _PPC object exists, rmmod is disallowed then */ 255 int acpi_processor_notify_smm(struct module *calling_module); 256 257 /* parsing the _P* objects. */ 258 extern int acpi_processor_get_performance_info(struct acpi_processor *pr); 259 260 /* for communication between multiple parts of the processor kernel module */ 261 DECLARE_PER_CPU(struct acpi_processor *, processors); 262 extern struct acpi_processor_errata errata; 263 264 #if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE) 265 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 266 unsigned int cpu); 267 int acpi_processor_ffh_cstate_probe(unsigned int cpu, 268 struct acpi_processor_cx *cx, 269 struct acpi_power_register *reg); 270 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 271 #else 272 static inline void acpi_processor_power_init_bm_check(struct 273 acpi_processor_flags 274 *flags, unsigned int cpu) 275 { 276 flags->bm_check = 1; 277 return; 278 } 279 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 280 struct acpi_processor_cx *cx, 281 struct acpi_power_register 282 *reg) 283 { 284 return -1; 285 } 286 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 287 *cstate) 288 { 289 return; 290 } 291 #endif 292 293 /* in processor_perflib.c */ 294 295 #ifdef CONFIG_CPU_FREQ 296 void acpi_processor_ppc_init(void); 297 void acpi_processor_ppc_exit(void); 298 void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); 299 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); 300 #else 301 static inline void acpi_processor_ppc_init(void) 302 { 303 return; 304 } 305 static inline void acpi_processor_ppc_exit(void) 306 { 307 return; 308 } 309 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr, 310 int event_flag) 311 { 312 static unsigned int printout = 1; 313 if (printout) { 314 printk(KERN_WARNING 315 "Warning: Processor Platform Limit event detected, but not handled.\n"); 316 printk(KERN_WARNING 317 "Consider compiling CPUfreq support into your kernel.\n"); 318 printout = 0; 319 } 320 return 0; 321 } 322 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) 323 { 324 return -ENODEV; 325 } 326 327 #endif /* CONFIG_CPU_FREQ */ 328 329 /* in processor_core.c */ 330 phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); 331 phys_cpuid_t acpi_map_madt_entry(u32 acpi_id); 332 int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); 333 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); 334 335 #ifdef CONFIG_ACPI_CPPC_LIB 336 extern int acpi_cppc_processor_probe(struct acpi_processor *pr); 337 extern void acpi_cppc_processor_exit(struct acpi_processor *pr); 338 #else 339 static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) 340 { 341 return 0; 342 } 343 static inline void acpi_cppc_processor_exit(struct acpi_processor *pr) 344 { 345 return; 346 } 347 #endif /* CONFIG_ACPI_CPPC_LIB */ 348 349 /* in processor_pdc.c */ 350 void acpi_processor_set_pdc(acpi_handle handle); 351 352 /* in processor_throttling.c */ 353 #ifdef CONFIG_ACPI_CPU_FREQ_PSS 354 int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 355 int acpi_processor_get_throttling_info(struct acpi_processor *pr); 356 extern int acpi_processor_set_throttling(struct acpi_processor *pr, 357 int state, bool force); 358 /* 359 * Reevaluate whether the T-state is invalid after one cpu is 360 * onlined/offlined. In such case the flags.throttling will be updated. 361 */ 362 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 363 bool is_dead); 364 extern const struct file_operations acpi_processor_throttling_fops; 365 extern void acpi_processor_throttling_init(void); 366 #else 367 static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr) 368 { 369 return 0; 370 } 371 372 static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr) 373 { 374 return -ENODEV; 375 } 376 377 static inline int acpi_processor_set_throttling(struct acpi_processor *pr, 378 int state, bool force) 379 { 380 return -ENODEV; 381 } 382 383 static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 384 bool is_dead) {} 385 386 static inline void acpi_processor_throttling_init(void) {} 387 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 388 389 /* in processor_idle.c */ 390 extern struct cpuidle_driver acpi_idle_driver; 391 #ifdef CONFIG_ACPI_PROCESSOR_IDLE 392 int acpi_processor_power_init(struct acpi_processor *pr); 393 int acpi_processor_power_exit(struct acpi_processor *pr); 394 int acpi_processor_power_state_has_changed(struct acpi_processor *pr); 395 int acpi_processor_hotplug(struct acpi_processor *pr); 396 #else 397 static inline int acpi_processor_power_init(struct acpi_processor *pr) 398 { 399 return -ENODEV; 400 } 401 402 static inline int acpi_processor_power_exit(struct acpi_processor *pr) 403 { 404 return -ENODEV; 405 } 406 407 static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr) 408 { 409 return -ENODEV; 410 } 411 412 static inline int acpi_processor_hotplug(struct acpi_processor *pr) 413 { 414 return -ENODEV; 415 } 416 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ 417 418 /* in processor_thermal.c */ 419 int acpi_processor_get_limit_info(struct acpi_processor *pr); 420 extern const struct thermal_cooling_device_ops processor_cooling_ops; 421 #if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ) 422 void acpi_thermal_cpufreq_init(void); 423 void acpi_thermal_cpufreq_exit(void); 424 #else 425 static inline void acpi_thermal_cpufreq_init(void) 426 { 427 return; 428 } 429 static inline void acpi_thermal_cpufreq_exit(void) 430 { 431 return; 432 } 433 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 434 435 #endif 436