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