include/acpi/processor.h

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