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