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
   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
  38 /* Power Management */
  39
  40 struct acpi_processor_cx;
  41
  42 struct acpi_power_register {
  43         u8 descriptor;
  44         u16 length;
  45         u8 space_id;
  46         u8 bit_width;
  47         u8 bit_offset;
  48         u8 reserved;
  49         u64 address;
  50 } __attribute__ ((packed));
  51
  52 struct acpi_processor_cx_policy {
  53         u32 count;
  54         struct acpi_processor_cx *state;
  55         struct {
  56                 u32 time;
  57                 u32 ticks;
  58                 u32 count;
  59                 u32 bm;
  60         } threshold;
  61 };
  62
  63 struct acpi_processor_cx {
  64         u8 valid;
  65         u8 type;
  66         u32 address;
  67         u8 space_id;
  68         u8 index;
  69         u32 latency;
  70         u32 latency_ticks;
  71         u32 power;
  72         u32 usage;
  73         u64 time;
  74         struct acpi_processor_cx_policy promotion;
  75         struct acpi_processor_cx_policy demotion;
  76 };
  77
  78 struct acpi_processor_power {
  79         struct cpuidle_device dev;
  80         struct acpi_processor_cx *state;
  81         unsigned long bm_check_timestamp;
  82         u32 default_state;
  83         u32 bm_activity;
  84         int count;
  85         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  86         int timer_broadcast_on_state;
  87 };
  88
  89 /* Performance Management */
  90
  91 struct acpi_psd_package {
  92         acpi_integer num_entries;
  93         acpi_integer revision;
  94         acpi_integer domain;
  95         acpi_integer coord_type;
  96         acpi_integer num_processors;
  97 } __attribute__ ((packed));
  98
  99 struct acpi_pct_register {
 100         u8 descriptor;
 101         u16 length;
 102         u8 space_id;
 103         u8 bit_width;
 104         u8 bit_offset;
 105         u8 reserved;
 106         u64 address;
 107 } __attribute__ ((packed));
 108
 109 struct acpi_processor_px {
 110         acpi_integer core_frequency;    /* megahertz */
 111         acpi_integer power;     /* milliWatts */
 112         acpi_integer transition_latency;        /* microseconds */
 113         acpi_integer bus_master_latency;        /* microseconds */
 114         acpi_integer control;   /* control value */
 115         acpi_integer status;    /* success indicator */
 116 };
 117
 118 struct acpi_processor_performance {
 119         unsigned int state;
 120         unsigned int platform_limit;
 121         struct acpi_pct_register control_register;
 122         struct acpi_pct_register status_register;
 123         unsigned int state_count;
 124         struct acpi_processor_px *states;
 125         struct acpi_psd_package domain_info;
 126         cpumask_t shared_cpu_map;
 127         unsigned int shared_type;
 128 };
 129
 130 /* Throttling Control */
 131
 132 struct acpi_tsd_package {
 133         acpi_integer num_entries;
 134         acpi_integer revision;
 135         acpi_integer domain;
 136         acpi_integer coord_type;
 137         acpi_integer num_processors;
 138 } __attribute__ ((packed));
 139
 140 struct acpi_ptc_register {
 141         u8 descriptor;
 142         u16 length;
 143         u8 space_id;
 144         u8 bit_width;
 145         u8 bit_offset;
 146         u8 reserved;
 147         u64 address;
 148 } __attribute__ ((packed));
 149
 150 struct acpi_processor_tx_tss {
 151         acpi_integer freqpercentage;    /* */
 152         acpi_integer power;     /* milliWatts */
 153         acpi_integer transition_latency;        /* microseconds */
 154         acpi_integer control;   /* control value */
 155         acpi_integer status;    /* success indicator */
 156 };
 157 struct acpi_processor_tx {
 158         u16 power;
 159         u16 performance;
 160 };
 161
 162 struct acpi_processor;
 163 struct acpi_processor_throttling {
 164         unsigned int state;
 165         unsigned int platform_limit;
 166         struct acpi_pct_register control_register;
 167         struct acpi_pct_register status_register;
 168         unsigned int state_count;
 169         struct acpi_processor_tx_tss *states_tss;
 170         struct acpi_tsd_package domain_info;
 171         cpumask_t shared_cpu_map;
 172         int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
 173         int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
 174                                               int state);
 175
 176         u32 address;
 177         u8 duty_offset;
 178         u8 duty_width;
 179         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
 180 };
 181
 182 /* Limit Interface */
 183
 184 struct acpi_processor_lx {
 185         int px;                 /* performace state */
 186         int tx;                 /* throttle level */
 187 };
 188
 189 struct acpi_processor_limit {
 190         struct acpi_processor_lx state; /* current limit */
 191         struct acpi_processor_lx thermal;       /* thermal limit */
 192         struct acpi_processor_lx user;  /* user limit */
 193 };
 194
 195 struct acpi_processor_flags {
 196         u8 power:1;
 197         u8 performance:1;
 198         u8 throttling:1;
 199         u8 limit:1;
 200         u8 bm_control:1;
 201         u8 bm_check:1;
 202         u8 has_cst:1;
 203         u8 power_setup_done:1;
 204         u8 bm_rld_set:1;
 205 };
 206
 207 struct acpi_processor {
 208         acpi_handle handle;
 209         u32 acpi_id;
 210         u32 id;
 211         u32 pblk;
 212         int performance_platform_limit;
 213         int throttling_platform_limit;
 214         /* 0 - states 0..n-th state available */
 215
 216         struct acpi_processor_flags flags;
 217         struct acpi_processor_power power;
 218         struct acpi_processor_performance *performance;
 219         struct acpi_processor_throttling throttling;
 220         struct acpi_processor_limit limit;
 221
 222         /* the _PDC objects for this processor, if any */
 223         struct acpi_object_list *pdc;
 224 };
 225
 226 struct acpi_processor_errata {
 227         u8 smp;
 228         struct {
 229                 u8 throttle:1;
 230                 u8 fdma:1;
 231                 u8 reserved:6;
 232                 u32 bmisx;
 233         } piix4;
 234 };
 235
 236 extern int acpi_processor_preregister_performance(struct
 237                                                   acpi_processor_performance
 238                                                   *performance);
 239
 240 extern int acpi_processor_register_performance(struct acpi_processor_performance
 241                                                *performance, unsigned int cpu);
 242 extern void acpi_processor_unregister_performance(struct
 243                                                   acpi_processor_performance
 244                                                   *performance,
 245                                                   unsigned int cpu);
 246
 247 /* note: this locks both the calling module and the processor module
 248          if a _PPC object exists, rmmod is disallowed then */
 249 int acpi_processor_notify_smm(struct module *calling_module);
 250
 251 /* for communication between multiple parts of the processor kernel module */
 252 extern struct acpi_processor *processors[NR_CPUS];
 253 extern struct acpi_processor_errata errata;
 254
 255 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
 256
 257 #ifdef ARCH_HAS_POWER_INIT
 258 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 259                                         unsigned int cpu);
 260 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 261                                     struct acpi_processor_cx *cx,
 262                                     struct acpi_power_register *reg);
 263 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
 264 #else
 265 static inline void acpi_processor_power_init_bm_check(struct
 266                                                       acpi_processor_flags
 267                                                       *flags, unsigned int cpu)
 268 {
 269         flags->bm_check = 1;
 270         return;
 271 }
 272 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 273                                                   struct acpi_processor_cx *cx,
 274                                                   struct acpi_power_register
 275                                                   *reg)
 276 {
 277         return -1;
 278 }
 279 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
 280                                                    *cstate)
 281 {
 282         return;
 283 }
 284 #endif
 285
 286 /* in processor_perflib.c */
 287
 288 #ifdef CONFIG_CPU_FREQ
 289 void acpi_processor_ppc_init(void);
 290 void acpi_processor_ppc_exit(void);
 291 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
 292 #else
 293 static inline void acpi_processor_ppc_init(void)
 294 {
 295         return;
 296 }
 297 static inline void acpi_processor_ppc_exit(void)
 298 {
 299         return;
 300 }
 301 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
 302 {
 303         static unsigned int printout = 1;
 304         if (printout) {
 305                 printk(KERN_WARNING
 306                        "Warning: Processor Platform Limit event detected, but not handled.\n");
 307                 printk(KERN_WARNING
 308                        "Consider compiling CPUfreq support into your kernel.\n");
 309                 printout = 0;
 310         }
 311         return 0;
 312 }
 313 #endif                          /* CONFIG_CPU_FREQ */
 314
 315 /* in processor_throttling.c */
 316 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 317 extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
 318 extern struct file_operations acpi_processor_throttling_fops;
 319
 320 /* in processor_idle.c */
 321 int acpi_processor_power_init(struct acpi_processor *pr,
 322                               struct acpi_device *device);
 323 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 324 int acpi_processor_power_exit(struct acpi_processor *pr,
 325                               struct acpi_device *device);
 326 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
 327 int acpi_processor_resume(struct acpi_device * device);
 328 extern struct cpuidle_driver acpi_idle_driver;
 329
 330 /* in processor_thermal.c */
 331 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 332 extern struct file_operations acpi_processor_limit_fops;
 333
 334 #ifdef CONFIG_CPU_FREQ
 335 void acpi_thermal_cpufreq_init(void);
 336 void acpi_thermal_cpufreq_exit(void);
 337 #else
 338 static inline void acpi_thermal_cpufreq_init(void)
 339 {
 340         return;
 341 }
 342 static inline void acpi_thermal_cpufreq_exit(void)
 343 {
 344         return;
 345 }
 346 #endif
 347
 348 #endif