1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ACPI_PROCESSOR_H 3 #define __ACPI_PROCESSOR_H 4 5 #include <linux/kernel.h> 6 #include <linux/cpu.h> 7 #include <linux/cpufreq.h> 8 #include <linux/pm_qos.h> 9 #include <linux/thermal.h> 10 #include <asm/acpi.h> 11 12 #define ACPI_PROCESSOR_CLASS "processor" 13 #define ACPI_PROCESSOR_DEVICE_NAME "Processor" 14 #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" 15 #define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010" 16 17 #define ACPI_PROCESSOR_BUSY_METRIC 10 18 19 #define ACPI_PROCESSOR_MAX_POWER 8 20 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 21 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 22 23 #define ACPI_PROCESSOR_MAX_THROTTLING 16 24 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ 25 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 26 27 #define ACPI_PDC_REVISION_ID 0x1 28 29 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 30 #define ACPI_PSD_REV0_ENTRIES 5 31 32 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 33 #define ACPI_TSD_REV0_ENTRIES 5 34 /* 35 * Types of coordination defined in ACPI 3.0. Same macros can be used across 36 * P, C and T states 37 */ 38 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc 39 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd 40 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe 41 42 #define ACPI_CSTATE_SYSTEMIO 0 43 #define ACPI_CSTATE_FFH 1 44 #define ACPI_CSTATE_HALT 2 45 #define ACPI_CSTATE_INTEGER 3 46 47 #define ACPI_CX_DESC_LEN 32 48 49 /* Power Management */ 50 51 struct acpi_processor_cx; 52 53 struct acpi_power_register { 54 u8 descriptor; 55 u16 length; 56 u8 space_id; 57 u8 bit_width; 58 u8 bit_offset; 59 u8 access_size; 60 u64 address; 61 } __packed; 62 63 struct acpi_processor_cx { 64 u8 valid; 65 u8 type; 66 u32 address; 67 u8 entry_method; 68 u8 index; 69 u32 latency; 70 u8 bm_sts_skip; 71 char desc[ACPI_CX_DESC_LEN]; 72 }; 73 74 struct acpi_lpi_state { 75 u32 min_residency; 76 u32 wake_latency; /* worst case */ 77 u32 flags; 78 u32 arch_flags; 79 u32 res_cnt_freq; 80 u32 enable_parent_state; 81 u64 address; 82 u8 index; 83 u8 entry_method; 84 char desc[ACPI_CX_DESC_LEN]; 85 }; 86 87 struct acpi_processor_power { 88 int count; 89 union { 90 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; 91 struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER]; 92 }; 93 int timer_broadcast_on_state; 94 }; 95 96 /* Performance Management */ 97 98 struct acpi_psd_package { 99 u64 num_entries; 100 u64 revision; 101 u64 domain; 102 u64 coord_type; 103 u64 num_processors; 104 } __packed; 105 106 struct acpi_pct_register { 107 u8 descriptor; 108 u16 length; 109 u8 space_id; 110 u8 bit_width; 111 u8 bit_offset; 112 u8 reserved; 113 u64 address; 114 } __packed; 115 116 struct acpi_processor_px { 117 u64 core_frequency; /* megahertz */ 118 u64 power; /* milliWatts */ 119 u64 transition_latency; /* microseconds */ 120 u64 bus_master_latency; /* microseconds */ 121 u64 control; /* control value */ 122 u64 status; /* success indicator */ 123 }; 124 125 struct acpi_processor_performance { 126 unsigned int state; 127 unsigned int platform_limit; 128 struct acpi_pct_register control_register; 129 struct acpi_pct_register status_register; 130 unsigned int state_count; 131 struct acpi_processor_px *states; 132 struct acpi_psd_package domain_info; 133 cpumask_var_t shared_cpu_map; 134 unsigned int shared_type; 135 }; 136 137 /* Throttling Control */ 138 139 struct acpi_tsd_package { 140 u64 num_entries; 141 u64 revision; 142 u64 domain; 143 u64 coord_type; 144 u64 num_processors; 145 } __packed; 146 147 struct acpi_ptc_register { 148 u8 descriptor; 149 u16 length; 150 u8 space_id; 151 u8 bit_width; 152 u8 bit_offset; 153 u8 reserved; 154 u64 address; 155 } __packed; 156 157 struct acpi_processor_tx_tss { 158 u64 freqpercentage; /* */ 159 u64 power; /* milliWatts */ 160 u64 transition_latency; /* microseconds */ 161 u64 control; /* control value */ 162 u64 status; /* success indicator */ 163 }; 164 struct acpi_processor_tx { 165 u16 power; 166 u16 performance; 167 }; 168 169 struct acpi_processor; 170 struct acpi_processor_throttling { 171 unsigned int state; 172 unsigned int platform_limit; 173 struct acpi_pct_register control_register; 174 struct acpi_pct_register status_register; 175 unsigned int state_count; 176 struct acpi_processor_tx_tss *states_tss; 177 struct acpi_tsd_package domain_info; 178 cpumask_var_t shared_cpu_map; 179 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); 180 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, 181 int state, bool force); 182 183 u32 address; 184 u8 duty_offset; 185 u8 duty_width; 186 u8 tsd_valid_flag; 187 unsigned int shared_type; 188 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; 189 }; 190 191 /* Limit Interface */ 192 193 struct acpi_processor_lx { 194 int px; /* performance state */ 195 int tx; /* throttle level */ 196 }; 197 198 struct acpi_processor_limit { 199 struct acpi_processor_lx state; /* current limit */ 200 struct acpi_processor_lx thermal; /* thermal limit */ 201 struct acpi_processor_lx user; /* user limit */ 202 }; 203 204 struct acpi_processor_flags { 205 u8 power:1; 206 u8 performance:1; 207 u8 throttling:1; 208 u8 limit:1; 209 u8 bm_control:1; 210 u8 bm_check:1; 211 u8 has_cst:1; 212 u8 has_lpi:1; 213 u8 power_setup_done:1; 214 u8 bm_rld_set:1; 215 u8 need_hotplug_init:1; 216 }; 217 218 struct acpi_processor { 219 acpi_handle handle; 220 u32 acpi_id; 221 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */ 222 u32 id; /* CPU logical ID allocated by OS */ 223 u32 pblk; 224 int performance_platform_limit; 225 int throttling_platform_limit; 226 /* 0 - states 0..n-th state available */ 227 228 struct acpi_processor_flags flags; 229 struct acpi_processor_power power; 230 struct acpi_processor_performance *performance; 231 struct acpi_processor_throttling throttling; 232 struct acpi_processor_limit limit; 233 struct thermal_cooling_device *cdev; 234 struct device *dev; /* Processor device. */ 235 struct dev_pm_qos_request perflib_req; 236 struct dev_pm_qos_request thermal_req; 237 }; 238 239 struct acpi_processor_errata { 240 u8 smp; 241 struct { 242 u8 throttle:1; 243 u8 fdma:1; 244 u8 reserved:6; 245 u32 bmisx; 246 } piix4; 247 }; 248 249 extern int acpi_processor_preregister_performance(struct 250 acpi_processor_performance 251 __percpu *performance); 252 253 extern int acpi_processor_register_performance(struct acpi_processor_performance 254 *performance, unsigned int cpu); 255 extern void acpi_processor_unregister_performance(unsigned int cpu); 256 257 int acpi_processor_pstate_control(void); 258 /* note: this locks both the calling module and the processor module 259 if a _PPC object exists, rmmod is disallowed then */ 260 int acpi_processor_notify_smm(struct module *calling_module); 261 int acpi_processor_get_psd(acpi_handle handle, 262 struct acpi_psd_package *pdomain); 263 264 /* parsing the _P* objects. */ 265 extern int acpi_processor_get_performance_info(struct acpi_processor *pr); 266 267 /* for communication between multiple parts of the processor kernel module */ 268 DECLARE_PER_CPU(struct acpi_processor *, processors); 269 extern struct acpi_processor_errata errata; 270 271 #if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE) 272 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 273 unsigned int cpu); 274 int acpi_processor_ffh_cstate_probe(unsigned int cpu, 275 struct acpi_processor_cx *cx, 276 struct acpi_power_register *reg); 277 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 278 #else 279 static inline void acpi_processor_power_init_bm_check(struct 280 acpi_processor_flags 281 *flags, unsigned int cpu) 282 { 283 flags->bm_check = 1; 284 return; 285 } 286 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 287 struct acpi_processor_cx *cx, 288 struct acpi_power_register 289 *reg) 290 { 291 return -1; 292 } 293 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 294 *cstate) 295 { 296 return; 297 } 298 #endif 299 300 /* in processor_perflib.c */ 301 302 #ifdef CONFIG_CPU_FREQ 303 extern bool acpi_processor_cpufreq_init; 304 void acpi_processor_ignore_ppc_init(void); 305 void acpi_processor_ppc_init(int cpu); 306 void acpi_processor_ppc_exit(int cpu); 307 void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); 308 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); 309 #else 310 static inline void acpi_processor_ignore_ppc_init(void) 311 { 312 return; 313 } 314 static inline void acpi_processor_ppc_init(int cpu) 315 { 316 return; 317 } 318 static inline void acpi_processor_ppc_exit(int cpu) 319 { 320 return; 321 } 322 static inline void acpi_processor_ppc_has_changed(struct acpi_processor *pr, 323 int event_flag) 324 { 325 static unsigned int printout = 1; 326 if (printout) { 327 printk(KERN_WARNING 328 "Warning: Processor Platform Limit event detected, but not handled.\n"); 329 printk(KERN_WARNING 330 "Consider compiling CPUfreq support into your kernel.\n"); 331 printout = 0; 332 } 333 } 334 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) 335 { 336 return -ENODEV; 337 } 338 339 #endif /* CONFIG_CPU_FREQ */ 340 341 /* in processor_core.c */ 342 phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); 343 phys_cpuid_t acpi_map_madt_entry(u32 acpi_id); 344 int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); 345 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); 346 347 #ifdef CONFIG_ACPI_CPPC_LIB 348 extern int acpi_cppc_processor_probe(struct acpi_processor *pr); 349 extern void acpi_cppc_processor_exit(struct acpi_processor *pr); 350 #else 351 static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) 352 { 353 return 0; 354 } 355 static inline void acpi_cppc_processor_exit(struct acpi_processor *pr) 356 { 357 return; 358 } 359 #endif /* CONFIG_ACPI_CPPC_LIB */ 360 361 /* in processor_pdc.c */ 362 void acpi_processor_set_pdc(acpi_handle handle); 363 364 /* in processor_throttling.c */ 365 #ifdef CONFIG_ACPI_CPU_FREQ_PSS 366 int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 367 int acpi_processor_get_throttling_info(struct acpi_processor *pr); 368 extern int acpi_processor_set_throttling(struct acpi_processor *pr, 369 int state, bool force); 370 /* 371 * Reevaluate whether the T-state is invalid after one cpu is 372 * onlined/offlined. In such case the flags.throttling will be updated. 373 */ 374 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 375 bool is_dead); 376 extern const struct file_operations acpi_processor_throttling_fops; 377 extern void acpi_processor_throttling_init(void); 378 #else 379 static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr) 380 { 381 return 0; 382 } 383 384 static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr) 385 { 386 return -ENODEV; 387 } 388 389 static inline int acpi_processor_set_throttling(struct acpi_processor *pr, 390 int state, bool force) 391 { 392 return -ENODEV; 393 } 394 395 static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 396 bool is_dead) {} 397 398 static inline void acpi_processor_throttling_init(void) {} 399 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 400 401 /* in processor_idle.c */ 402 extern struct cpuidle_driver acpi_idle_driver; 403 #ifdef CONFIG_ACPI_PROCESSOR_IDLE 404 int acpi_processor_power_init(struct acpi_processor *pr); 405 int acpi_processor_power_exit(struct acpi_processor *pr); 406 int acpi_processor_power_state_has_changed(struct acpi_processor *pr); 407 int acpi_processor_hotplug(struct acpi_processor *pr); 408 #else 409 static inline int acpi_processor_power_init(struct acpi_processor *pr) 410 { 411 return -ENODEV; 412 } 413 414 static inline int acpi_processor_power_exit(struct acpi_processor *pr) 415 { 416 return -ENODEV; 417 } 418 419 static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr) 420 { 421 return -ENODEV; 422 } 423 424 static inline int acpi_processor_hotplug(struct acpi_processor *pr) 425 { 426 return -ENODEV; 427 } 428 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ 429 430 /* in processor_thermal.c */ 431 int acpi_processor_get_limit_info(struct acpi_processor *pr); 432 extern const struct thermal_cooling_device_ops processor_cooling_ops; 433 #if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ) 434 void acpi_thermal_cpufreq_init(int cpu); 435 void acpi_thermal_cpufreq_exit(int cpu); 436 #else 437 static inline void acpi_thermal_cpufreq_init(int cpu) 438 { 439 return; 440 } 441 static inline void acpi_thermal_cpufreq_exit(int cpu) 442 { 443 return; 444 } 445 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 446 447 #endif 448