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         struct acpi_processor_cx_policy promotion;
  66         struct acpi_processor_cx_policy demotion;
  67 };
  68
  69 struct acpi_processor_power {
  70         struct acpi_processor_cx *state;
  71         unsigned long bm_check_timestamp;
  72         u32 default_state;
  73         u32 bm_activity;
  74         int count;
  75         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
  76 };
  77
  78 /* Performance Management */
  79
  80 struct acpi_psd_package {
  81         acpi_integer num_entries;
  82         acpi_integer revision;
  83         acpi_integer domain;
  84         acpi_integer coord_type;
  85         acpi_integer num_processors;
  86 } __attribute__ ((packed));
  87
  88 struct acpi_pct_register {
  89         u8 descriptor;
  90         u16 length;
  91         u8 space_id;
  92         u8 bit_width;
  93         u8 bit_offset;
  94         u8 reserved;
  95         u64 address;
  96 } __attribute__ ((packed));
  97
  98 struct acpi_processor_px {
  99         acpi_integer core_frequency;    /* megahertz */
 100         acpi_integer power;     /* milliWatts */
 101         acpi_integer transition_latency;        /* microseconds */
 102         acpi_integer bus_master_latency;        /* microseconds */
 103         acpi_integer control;   /* control value */
 104         acpi_integer status;    /* success indicator */
 105 };
 106
 107 struct acpi_processor_performance {
 108         unsigned int state;
 109         unsigned int platform_limit;
 110         struct acpi_pct_register control_register;
 111         struct acpi_pct_register status_register;
 112         unsigned int state_count;
 113         struct acpi_processor_px *states;
 114         struct acpi_psd_package domain_info;
 115         cpumask_t shared_cpu_map;
 116         unsigned int shared_type;
 117 };
 118
 119 /* Throttling Control */
 120
 121 struct acpi_processor_tx {
 122         u16 power;
 123         u16 performance;
 124 };
 125
 126 struct acpi_processor_throttling {
 127         int state;
 128         u32 address;
 129         u8 duty_offset;
 130         u8 duty_width;
 131         int state_count;
 132         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
 133 };
 134
 135 /* Limit Interface */
 136
 137 struct acpi_processor_lx {
 138         int px;                 /* performace state */
 139         int tx;                 /* throttle level */
 140 };
 141
 142 struct acpi_processor_limit {
 143         struct acpi_processor_lx state; /* current limit */
 144         struct acpi_processor_lx thermal;       /* thermal limit */
 145         struct acpi_processor_lx user;  /* user limit */
 146 };
 147
 148 struct acpi_processor_flags {
 149         u8 power:1;
 150         u8 performance:1;
 151         u8 throttling:1;
 152         u8 limit:1;
 153         u8 bm_control:1;
 154         u8 bm_check:1;
 155         u8 has_cst:1;
 156         u8 power_setup_done:1;
 157 };
 158
 159 struct acpi_processor {
 160         acpi_handle handle;
 161         u32 acpi_id;
 162         u32 id;
 163         u32 pblk;
 164         int performance_platform_limit;
 165         struct acpi_processor_flags flags;
 166         struct acpi_processor_power power;
 167         struct acpi_processor_performance *performance;
 168         struct acpi_processor_throttling throttling;
 169         struct acpi_processor_limit limit;
 170
 171         /* the _PDC objects for this processor, if any */
 172         struct acpi_object_list *pdc;
 173 };
 174
 175 struct acpi_processor_errata {
 176         u8 smp;
 177         struct {
 178                 u8 throttle:1;
 179                 u8 fdma:1;
 180                 u8 reserved:6;
 181                 u32 bmisx;
 182         } piix4;
 183 };
 184
 185 extern int acpi_processor_preregister_performance(
 186                 struct acpi_processor_performance **performance);
 187
 188 extern int acpi_processor_register_performance(struct acpi_processor_performance
 189                                                *performance, unsigned int cpu);
 190 extern void acpi_processor_unregister_performance(struct
 191                                                   acpi_processor_performance
 192                                                   *performance,
 193                                                   unsigned int cpu);
 194
 195 /* note: this locks both the calling module and the processor module
 196          if a _PPC object exists, rmmod is disallowed then */
 197 int acpi_processor_notify_smm(struct module *calling_module);
 198
 199 /* for communication between multiple parts of the processor kernel module */
 200 extern struct acpi_processor *processors[NR_CPUS];
 201 extern struct acpi_processor_errata errata;
 202
 203 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
 204
 205 #ifdef ARCH_HAS_POWER_INIT
 206 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 207                                         unsigned int cpu);
 208 #else
 209 static inline void acpi_processor_power_init_bm_check(struct
 210                                                       acpi_processor_flags
 211                                                       *flags, unsigned int cpu)
 212 {
 213         flags->bm_check = 1;
 214         return;
 215 }
 216 #endif
 217
 218 /* in processor_perflib.c */
 219
 220 #ifdef CONFIG_CPU_FREQ
 221 void acpi_processor_ppc_init(void);
 222 void acpi_processor_ppc_exit(void);
 223 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
 224 #else
 225 static inline void acpi_processor_ppc_init(void)
 226 {
 227         return;
 228 }
 229 static inline void acpi_processor_ppc_exit(void)
 230 {
 231         return;
 232 }
 233 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
 234 {
 235         static unsigned int printout = 1;
 236         if (printout) {
 237                 printk(KERN_WARNING
 238                        "Warning: Processor Platform Limit event detected, but not handled.\n");
 239                 printk(KERN_WARNING
 240                        "Consider compiling CPUfreq support into your kernel.\n");
 241                 printout = 0;
 242         }
 243         return 0;
 244 }
 245 #endif                          /* CONFIG_CPU_FREQ */
 246
 247 /* in processor_throttling.c */
 248 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
 249 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
 250 extern struct file_operations acpi_processor_throttling_fops;
 251
 252 /* in processor_idle.c */
 253 int acpi_processor_power_init(struct acpi_processor *pr,
 254                               struct acpi_device *device);
 255 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 256 int acpi_processor_power_exit(struct acpi_processor *pr,
 257                               struct acpi_device *device);
 258
 259 /* in processor_thermal.c */
 260 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 261 extern struct file_operations acpi_processor_limit_fops;
 262
 263 #ifdef CONFIG_CPU_FREQ
 264 void acpi_thermal_cpufreq_init(void);
 265 void acpi_thermal_cpufreq_exit(void);
 266 #else
 267 static inline void acpi_thermal_cpufreq_init(void)
 268 {
 269         return;
 270 }
 271 static inline void acpi_thermal_cpufreq_exit(void)
 272 {
 273         return;
 274 }
 275 #endif
 276
 277 #endif