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 350