include/acpi/processor.h

   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 freq_qos_request perflib_req;
 236         struct freq_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(struct cpufreq_policy *policy);
 306 void acpi_processor_ppc_exit(struct cpufreq_policy *policy);
 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(struct cpufreq_policy *policy)
 315 {
 316         return;
 317 }
 318 static inline void acpi_processor_ppc_exit(struct cpufreq_policy *policy)
 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(struct cpufreq_policy *policy);
 435 void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy);
 436 #else
 437 static inline void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
 438 {
 439         return;
 440 }
 441 static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
 442 {
 443         return;
 444 }
 445 #endif  /* CONFIG_ACPI_CPU_FREQ_PSS */
 446
 447 #endif