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/cpuidle.h>
   7 #include <linux/thermal.h>
   8 #include <asm/acpi.h>
   9
  10 #define ACPI_PROCESSOR_BUSY_METRIC      10
  11
  12 #define ACPI_PROCESSOR_MAX_POWER        8
  13 #define ACPI_PROCESSOR_MAX_C2_LATENCY   100
  14 #define ACPI_PROCESSOR_MAX_C3_LATENCY   1000
  15
  16 #define ACPI_PROCESSOR_MAX_THROTTLING   16
  17 #define ACPI_PROCESSOR_MAX_THROTTLE     250     /* 25% */
  18 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH   4
  19
  20 #define ACPI_PDC_REVISION_ID            0x1
  21
  22 #define ACPI_PSD_REV0_REVISION          0       /* Support for _PSD as in ACPI 3.0 */
  23 #define ACPI_PSD_REV0_ENTRIES           5
  24
  25 #define ACPI_TSD_REV0_REVISION          0       /* Support for _PSD as in ACPI 3.0 */
  26 #define ACPI_TSD_REV0_ENTRIES           5
  27 /*
  28  * Types of coordination defined in ACPI 3.0. Same macros can be used across
  29  * P, C and T states
  30  */
  31 #define DOMAIN_COORD_TYPE_SW_ALL        0xfc
  32 #define DOMAIN_COORD_TYPE_SW_ANY        0xfd
  33 #define DOMAIN_COORD_TYPE_HW_ALL        0xfe
  34
  35 #define ACPI_CSTATE_SYSTEMIO    0
  36 #define ACPI_CSTATE_FFH         1
  37 #define ACPI_CSTATE_HALT        2
  38
  39 #define ACPI_CX_DESC_LEN        32
  40
  41 /* Power Management */
  42
  43 struct acpi_processor_cx;
  44
  45 struct acpi_power_register {
  46         u8 descriptor;
  47         u16 length;
  48         u8 space_id;
  49         u8 bit_width;
  50         u8 bit_offset;
  51         u8 access_size;
  52         u64 address;
  53 } __attribute__ ((packed));
  54
  55 struct acpi_processor_cx_policy {
  56         u32 count;
  57         struct acpi_processor_cx *state;
  58         struct {
  59                 u32 time;
  60                 u32 ticks;
  61                 u32 count;
  62                 u32 bm;
  63         } threshold;
  64 };
  65
  66 struct acpi_processor_cx {
  67         u8 valid;
  68         u8 type;
  69         u32 address;
  70         u8 entry_method;
  71         u8 index;
  72         u32 latency;
  73         u32 latency_ticks;
  74         u32 power;
  75         u32 usage;
  76         u64 time;
  77         u8 bm_sts_skip;
  78         struct acpi_processor_cx_policy promotion;
  79         struct acpi_processor_cx_policy demotion;
  80         char desc[ACPI_CX_DESC_LEN];
  81 };
  82
  83 struct acpi_processor_power {
  84         struct cpuidle_device dev;
  85         struct acpi_processor_cx *state;
  86         unsigned long bm_check_timestamp;
  87         u32 default_state;
  88         int count;
  89         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  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 } __attribute__ ((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 } __attribute__ ((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 } __attribute__ ((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 } __attribute__ ((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 power_setup_done:1;
 210         u8 bm_rld_set:1;
 211 };
 212
 213 struct acpi_processor {
 214         acpi_handle handle;
 215         u32 acpi_id;
 216         u32 id;
 217         u32 pblk;
 218         int performance_platform_limit;
 219         int throttling_platform_limit;
 220         /* 0 - states 0..n-th state available */
 221
 222         struct acpi_processor_flags flags;
 223         struct acpi_processor_power power;
 224         struct acpi_processor_performance *performance;
 225         struct acpi_processor_throttling throttling;
 226         struct acpi_processor_limit limit;
 227         struct thermal_cooling_device *cdev;
 228 };
 229
 230 struct acpi_processor_errata {
 231         u8 smp;
 232         struct {
 233                 u8 throttle:1;
 234                 u8 fdma:1;
 235                 u8 reserved:6;
 236                 u32 bmisx;
 237         } piix4;
 238 };
 239
 240 extern int acpi_processor_preregister_performance(struct
 241                                                   acpi_processor_performance
 242                                                   __percpu *performance);
 243
 244 extern int acpi_processor_register_performance(struct acpi_processor_performance
 245                                                *performance, unsigned int cpu);
 246 extern void acpi_processor_unregister_performance(struct
 247                                                   acpi_processor_performance
 248                                                   *performance,
 249                                                   unsigned int cpu);
 250
 251 /* note: this locks both the calling module and the processor module
 252          if a _PPC object exists, rmmod is disallowed then */
 253 int acpi_processor_notify_smm(struct module *calling_module);
 254
 255 /* for communication between multiple parts of the processor kernel module */
 256 DECLARE_PER_CPU(struct acpi_processor *, processors);
 257 extern struct acpi_processor_errata errata;
 258
 259 #ifdef ARCH_HAS_POWER_INIT
 260 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 261                                         unsigned int cpu);
 262 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 263                                     struct acpi_processor_cx *cx,
 264                                     struct acpi_power_register *reg);
 265 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
 266 #else
 267 static inline void acpi_processor_power_init_bm_check(struct
 268                                                       acpi_processor_flags
 269                                                       *flags, unsigned int cpu)
 270 {
 271         flags->bm_check = 1;
 272         return;
 273 }
 274 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 275                                                   struct acpi_processor_cx *cx,
 276                                                   struct acpi_power_register
 277                                                   *reg)
 278 {
 279         return -1;
 280 }
 281 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
 282                                                    *cstate)
 283 {
 284         return;
 285 }
 286 #endif
 287
 288 /* in processor_perflib.c */
 289
 290 #ifdef CONFIG_CPU_FREQ
 291 void acpi_processor_ppc_init(void);
 292 void acpi_processor_ppc_exit(void);
 293 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
 294 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
 295 #else
 296 static inline void acpi_processor_ppc_init(void)
 297 {
 298         return;
 299 }
 300 static inline void acpi_processor_ppc_exit(void)
 301 {
 302         return;
 303 }
 304 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
 305                                                                 int event_flag)
 306 {
 307         static unsigned int printout = 1;
 308         if (printout) {
 309                 printk(KERN_WARNING
 310                        "Warning: Processor Platform Limit event detected, but not handled.\n");
 311                 printk(KERN_WARNING
 312                        "Consider compiling CPUfreq support into your kernel.\n");
 313                 printout = 0;
 314         }
 315         return 0;
 316 }
 317 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
 318 {
 319         return -ENODEV;
 320 }
 321
 322 #endif                          /* CONFIG_CPU_FREQ */
 323
 324 /* in processor_core.c */
 325 void acpi_processor_set_pdc(acpi_handle handle);
 326 #ifdef CONFIG_SMP
 327 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
 328 #else
 329 static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
 330 {
 331         return -1;
 332 }
 333 #endif
 334
 335 /* in processor_throttling.c */
 336 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
 337 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 338 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
 339                                          int state, bool force);
 340 extern const struct file_operations acpi_processor_throttling_fops;
 341 extern void acpi_processor_throttling_init(void);
 342 /* in processor_idle.c */
 343 int acpi_processor_power_init(struct acpi_processor *pr,
 344                               struct acpi_device *device);
 345 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 346 int acpi_processor_power_exit(struct acpi_processor *pr,
 347                               struct acpi_device *device);
 348 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
 349 int acpi_processor_resume(struct acpi_device * device);
 350 extern struct cpuidle_driver acpi_idle_driver;
 351
 352 /* in processor_thermal.c */
 353 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 354 extern const struct file_operations acpi_processor_limit_fops;
 355 extern struct thermal_cooling_device_ops processor_cooling_ops;
 356 #ifdef CONFIG_CPU_FREQ
 357 void acpi_thermal_cpufreq_init(void);
 358 void acpi_thermal_cpufreq_exit(void);
 359 #else
 360 static inline void acpi_thermal_cpufreq_init(void)
 361 {
 362         return;
 363 }
 364 static inline void acpi_thermal_cpufreq_exit(void)
 365 {
 366         return;
 367 }
 368 #endif
 369
 370 #endif