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