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 /*
  25  * Types of coordination defined in ACPI 3.0. Same macros can be used across
  26  * P, C and T states
  27  */
  28 #define DOMAIN_COORD_TYPE_SW_ALL        0xfc
  29 #define DOMAIN_COORD_TYPE_SW_ANY        0xfd
  30 #define DOMAIN_COORD_TYPE_HW_ALL        0xfe
  31
  32 /* Power Management */
  33
  34 struct acpi_processor_cx;
  35
  36 struct acpi_power_register {
  37         u8 descriptor;
  38         u16 length;
  39         u8 space_id;
  40         u8 bit_width;
  41         u8 bit_offset;
  42         u8 reserved;
  43         u64 address;
  44 } __attribute__ ((packed));
  45
  46 struct acpi_processor_cx_policy {
  47         u32 count;
  48         struct acpi_processor_cx *state;
  49         struct {
  50                 u32 time;
  51                 u32 ticks;
  52                 u32 count;
  53                 u32 bm;
  54         } threshold;
  55 };
  56
  57 struct acpi_processor_cx {
  58         u8 valid;
  59         u8 type;
  60         u32 address;
  61         u32 latency;
  62         u32 latency_ticks;
  63         u32 power;
  64         u32 usage;
  65         u64 time;
  66         struct acpi_processor_cx_policy promotion;
  67         struct acpi_processor_cx_policy demotion;
  68 };
  69
  70 struct acpi_processor_power {
  71         struct acpi_processor_cx *state;
  72         unsigned long bm_check_timestamp;
  73         u32 default_state;
  74         u32 bm_activity;
  75         int count;
  76         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  77 };
  78
  79 /* Performance Management */
  80
  81 struct acpi_psd_package {
  82         acpi_integer num_entries;
  83         acpi_integer revision;
  84         acpi_integer domain;
  85         acpi_integer coord_type;
  86         acpi_integer 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         acpi_integer core_frequency;    /* megahertz */
 101         acpi_integer power;     /* milliWatts */
 102         acpi_integer transition_latency;        /* microseconds */
 103         acpi_integer bus_master_latency;        /* microseconds */
 104         acpi_integer control;   /* control value */
 105         acpi_integer 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_t shared_cpu_map;
 117         unsigned int shared_type;
 118 };
 119
 120 /* Throttling Control */
 121
 122 struct acpi_processor_tx {
 123         u16 power;
 124         u16 performance;
 125 };
 126
 127 struct acpi_processor_throttling {
 128         int state;
 129         u32 address;
 130         u8 duty_offset;
 131         u8 duty_width;
 132         int state_count;
 133         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
 134 };
 135
 136 /* Limit Interface */
 137
 138 struct acpi_processor_lx {
 139         int px;                 /* performace state */
 140         int tx;                 /* throttle level */
 141 };
 142
 143 struct acpi_processor_limit {
 144         struct acpi_processor_lx state; /* current limit */
 145         struct acpi_processor_lx thermal;       /* thermal limit */
 146         struct acpi_processor_lx user;  /* user limit */
 147 };
 148
 149 struct acpi_processor_flags {
 150         u8 power:1;
 151         u8 performance:1;
 152         u8 throttling:1;
 153         u8 limit:1;
 154         u8 bm_control:1;
 155         u8 bm_check:1;
 156         u8 has_cst:1;
 157         u8 power_setup_done:1;
 158 };
 159
 160 struct acpi_processor {
 161         acpi_handle handle;
 162         u32 acpi_id;
 163         u32 id;
 164         u32 pblk;
 165         int performance_platform_limit;
 166         struct acpi_processor_flags flags;
 167         struct acpi_processor_power power;
 168         struct acpi_processor_performance *performance;
 169         struct acpi_processor_throttling throttling;
 170         struct acpi_processor_limit limit;
 171
 172         /* the _PDC objects for this processor, if any */
 173         struct acpi_object_list *pdc;
 174 };
 175
 176 struct acpi_processor_errata {
 177         u8 smp;
 178         struct {
 179                 u8 throttle:1;
 180                 u8 fdma:1;
 181                 u8 reserved:6;
 182                 u32 bmisx;
 183         } piix4;
 184 };
 185
 186 extern int acpi_processor_preregister_performance(
 187                 struct acpi_processor_performance **performance);
 188
 189 extern int acpi_processor_register_performance(struct acpi_processor_performance
 190                                                *performance, unsigned int cpu);
 191 extern void acpi_processor_unregister_performance(struct
 192                                                   acpi_processor_performance
 193                                                   *performance,
 194                                                   unsigned int cpu);
 195
 196 /* note: this locks both the calling module and the processor module
 197          if a _PPC object exists, rmmod is disallowed then */
 198 int acpi_processor_notify_smm(struct module *calling_module);
 199
 200 /* for communication between multiple parts of the processor kernel module */
 201 extern struct acpi_processor *processors[NR_CPUS];
 202 extern struct acpi_processor_errata errata;
 203
 204 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
 205
 206 #ifdef ARCH_HAS_POWER_INIT
 207 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 208                                         unsigned int cpu);
 209 #else
 210 static inline void acpi_processor_power_init_bm_check(struct
 211                                                       acpi_processor_flags
 212                                                       *flags, unsigned int cpu)
 213 {
 214         flags->bm_check = 1;
 215         return;
 216 }
 217 #endif
 218
 219 /* in processor_perflib.c */
 220
 221 #ifdef CONFIG_CPU_FREQ
 222 void acpi_processor_ppc_init(void);
 223 void acpi_processor_ppc_exit(void);
 224 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
 225 #else
 226 static inline void acpi_processor_ppc_init(void)
 227 {
 228         return;
 229 }
 230 static inline void acpi_processor_ppc_exit(void)
 231 {
 232         return;
 233 }
 234 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
 235 {
 236         static unsigned int printout = 1;
 237         if (printout) {
 238                 printk(KERN_WARNING
 239                        "Warning: Processor Platform Limit event detected, but not handled.\n");
 240                 printk(KERN_WARNING
 241                        "Consider compiling CPUfreq support into your kernel.\n");
 242                 printout = 0;
 243         }
 244         return 0;
 245 }
 246 #endif                          /* CONFIG_CPU_FREQ */
 247
 248 /* in processor_throttling.c */
 249 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 250 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
 251 extern struct file_operations acpi_processor_throttling_fops;
 252
 253 /* in processor_idle.c */
 254 int acpi_processor_power_init(struct acpi_processor *pr,
 255                               struct acpi_device *device);
 256 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 257 int acpi_processor_power_exit(struct acpi_processor *pr,
 258                               struct acpi_device *device);
 259
 260 /* in processor_thermal.c */
 261 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 262 extern struct file_operations acpi_processor_limit_fops;
 263
 264 #ifdef CONFIG_CPU_FREQ
 265 void acpi_thermal_cpufreq_init(void);
 266 void acpi_thermal_cpufreq_exit(void);
 267 #else
 268 static inline void acpi_thermal_cpufreq_init(void)
 269 {
 270         return;
 271 }
 272 static inline void acpi_thermal_cpufreq_exit(void)
 273 {
 274         return;
 275 }
 276 #endif
 277
 278 #endif