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 reserved;
  52         u64 address;
  53 } __attribute__ ((packed));
  54
  55 struct acpi_processor_cx {
  56         u8 valid;
  57         u8 type;
  58         u32 address;
  59         u8 entry_method;
  60         u8 index;
  61         u32 latency;
  62         u32 latency_ticks;
  63         u32 power;
  64         u32 usage;
  65         u64 time;
  66         char desc[ACPI_CX_DESC_LEN];
  67 };
  68
  69 struct acpi_processor_power {
  70         struct cpuidle_device dev;
  71         struct acpi_processor_cx *state;
  72         unsigned long bm_check_timestamp;
  73         u32 default_state;
  74         int count;
  75         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  76         int timer_broadcast_on_state;
  77 };
  78
  79 /* Performance Management */
  80
  81 struct acpi_psd_package {
  82         u64 num_entries;
  83         u64 revision;
  84         u64 domain;
  85         u64 coord_type;
  86         u64 num_processors;
  87 } __attribute__ ((packed));
  88
  89 struct acpi_pct_register {
  90         u8 descriptor;
  91         u16 length;
  92         u8 space_id;
  93         u8 bit_width;
  94         u8 bit_offset;
  95         u8 reserved;
  96         u64 address;
  97 } __attribute__ ((packed));
  98
  99 struct acpi_processor_px {
 100         u64 core_frequency;     /* megahertz */
 101         u64 power;      /* milliWatts */
 102         u64 transition_latency; /* microseconds */
 103         u64 bus_master_latency; /* microseconds */
 104         u64 control;    /* control value */
 105         u64 status;     /* success indicator */
 106 };
 107
 108 struct acpi_processor_performance {
 109         unsigned int state;
 110         unsigned int platform_limit;
 111         struct acpi_pct_register control_register;
 112         struct acpi_pct_register status_register;
 113         unsigned int state_count;
 114         struct acpi_processor_px *states;
 115         struct acpi_psd_package domain_info;
 116         cpumask_var_t shared_cpu_map;
 117         unsigned int shared_type;
 118 };
 119
 120 /* Throttling Control */
 121
 122 struct acpi_tsd_package {
 123         u64 num_entries;
 124         u64 revision;
 125         u64 domain;
 126         u64 coord_type;
 127         u64 num_processors;
 128 } __attribute__ ((packed));
 129
 130 struct acpi_ptc_register {
 131         u8 descriptor;
 132         u16 length;
 133         u8 space_id;
 134         u8 bit_width;
 135         u8 bit_offset;
 136         u8 reserved;
 137         u64 address;
 138 } __attribute__ ((packed));
 139
 140 struct acpi_processor_tx_tss {
 141         u64 freqpercentage;     /* */
 142         u64 power;      /* milliWatts */
 143         u64 transition_latency; /* microseconds */
 144         u64 control;    /* control value */
 145         u64 status;     /* success indicator */
 146 };
 147 struct acpi_processor_tx {
 148         u16 power;
 149         u16 performance;
 150 };
 151
 152 struct acpi_processor;
 153 struct acpi_processor_throttling {
 154         unsigned int state;
 155         unsigned int platform_limit;
 156         struct acpi_pct_register control_register;
 157         struct acpi_pct_register status_register;
 158         unsigned int state_count;
 159         struct acpi_processor_tx_tss *states_tss;
 160         struct acpi_tsd_package domain_info;
 161         cpumask_var_t shared_cpu_map;
 162         int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
 163         int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
 164                                               int state, bool force);
 165
 166         u32 address;
 167         u8 duty_offset;
 168         u8 duty_width;
 169         u8 tsd_valid_flag;
 170         unsigned int shared_type;
 171         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
 172 };
 173
 174 /* Limit Interface */
 175
 176 struct acpi_processor_lx {
 177         int px;                 /* performance state */
 178         int tx;                 /* throttle level */
 179 };
 180
 181 struct acpi_processor_limit {
 182         struct acpi_processor_lx state; /* current limit */
 183         struct acpi_processor_lx thermal;       /* thermal limit */
 184         struct acpi_processor_lx user;  /* user limit */
 185 };
 186
 187 struct acpi_processor_flags {
 188         u8 power:1;
 189         u8 performance:1;
 190         u8 throttling:1;
 191         u8 limit:1;
 192         u8 bm_control:1;
 193         u8 bm_check:1;
 194         u8 has_cst:1;
 195         u8 power_setup_done:1;
 196         u8 bm_rld_set:1;
 197 };
 198
 199 struct acpi_processor {
 200         acpi_handle handle;
 201         u32 acpi_id;
 202         u32 id;
 203         u32 pblk;
 204         int performance_platform_limit;
 205         int throttling_platform_limit;
 206         /* 0 - states 0..n-th state available */
 207
 208         struct acpi_processor_flags flags;
 209         struct acpi_processor_power power;
 210         struct acpi_processor_performance *performance;
 211         struct acpi_processor_throttling throttling;
 212         struct acpi_processor_limit limit;
 213         struct thermal_cooling_device *cdev;
 214 };
 215
 216 struct acpi_processor_errata {
 217         u8 smp;
 218         struct {
 219                 u8 throttle:1;
 220                 u8 fdma:1;
 221                 u8 reserved:6;
 222                 u32 bmisx;
 223         } piix4;
 224 };
 225
 226 extern int acpi_processor_preregister_performance(struct
 227                                                   acpi_processor_performance
 228                                                   __percpu *performance);
 229
 230 extern int acpi_processor_register_performance(struct acpi_processor_performance
 231                                                *performance, unsigned int cpu);
 232 extern void acpi_processor_unregister_performance(struct
 233                                                   acpi_processor_performance
 234                                                   *performance,
 235                                                   unsigned int cpu);
 236
 237 /* note: this locks both the calling module and the processor module
 238          if a _PPC object exists, rmmod is disallowed then */
 239 int acpi_processor_notify_smm(struct module *calling_module);
 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 #ifdef CONFIG_SMP
 313 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
 314 #else
 315 static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
 316 {
 317         return -1;
 318 }
 319 #endif
 320
 321 /* in processor_throttling.c */
 322 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
 323 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 324 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
 325                                          int state, bool force);
 326 extern const struct file_operations acpi_processor_throttling_fops;
 327 extern void acpi_processor_throttling_init(void);
 328 /* in processor_idle.c */
 329 int acpi_processor_power_init(struct acpi_processor *pr,
 330                               struct acpi_device *device);
 331 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 332 int acpi_processor_power_exit(struct acpi_processor *pr,
 333                               struct acpi_device *device);
 334 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
 335 int acpi_processor_resume(struct acpi_device * device);
 336 extern struct cpuidle_driver acpi_idle_driver;
 337
 338 /* in processor_thermal.c */
 339 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 340 extern const struct file_operations acpi_processor_limit_fops;
 341 extern struct thermal_cooling_device_ops processor_cooling_ops;
 342 #ifdef CONFIG_CPU_FREQ
 343 void acpi_thermal_cpufreq_init(void);
 344 void acpi_thermal_cpufreq_exit(void);
 345 #else
 346 static inline void acpi_thermal_cpufreq_init(void)
 347 {
 348         return;
 349 }
 350 static inline void acpi_thermal_cpufreq_exit(void)
 351 {
 352         return;
 353 }
 354 #endif
 355
 356 #endif