1 #ifndef __ACPI_PROCESSOR_H 2 #define __ACPI_PROCESSOR_H 3 4 #include <linux/kernel.h> 5 #include <linux/cpu.h> 6 #include <linux/thermal.h> 7 #include <asm/acpi.h> 8 9 #define ACPI_PROCESSOR_CLASS "processor" 10 #define ACPI_PROCESSOR_DEVICE_NAME "Processor" 11 #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" 12 13 #define ACPI_PROCESSOR_BUSY_METRIC 10 14 15 #define ACPI_PROCESSOR_MAX_POWER 8 16 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 17 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 18 19 #define ACPI_PROCESSOR_MAX_THROTTLING 16 20 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ 21 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 22 23 #define ACPI_PDC_REVISION_ID 0x1 24 25 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 26 #define ACPI_PSD_REV0_ENTRIES 5 27 28 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ 29 #define ACPI_TSD_REV0_ENTRIES 5 30 /* 31 * Types of coordination defined in ACPI 3.0. Same macros can be used across 32 * P, C and T states 33 */ 34 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc 35 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd 36 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe 37 38 #define ACPI_CSTATE_SYSTEMIO 0 39 #define ACPI_CSTATE_FFH 1 40 #define ACPI_CSTATE_HALT 2 41 42 #define ACPI_CX_DESC_LEN 32 43 44 /* Power Management */ 45 46 struct acpi_processor_cx; 47 48 struct acpi_power_register { 49 u8 descriptor; 50 u16 length; 51 u8 space_id; 52 u8 bit_width; 53 u8 bit_offset; 54 u8 access_size; 55 u64 address; 56 } __packed; 57 58 struct acpi_processor_cx { 59 u8 valid; 60 u8 type; 61 u32 address; 62 u8 entry_method; 63 u8 index; 64 u32 latency; 65 u8 bm_sts_skip; 66 char desc[ACPI_CX_DESC_LEN]; 67 }; 68 69 struct acpi_processor_power { 70 int count; 71 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; 72 int timer_broadcast_on_state; 73 }; 74 75 /* Performance Management */ 76 77 struct acpi_psd_package { 78 u64 num_entries; 79 u64 revision; 80 u64 domain; 81 u64 coord_type; 82 u64 num_processors; 83 } __packed; 84 85 struct acpi_pct_register { 86 u8 descriptor; 87 u16 length; 88 u8 space_id; 89 u8 bit_width; 90 u8 bit_offset; 91 u8 reserved; 92 u64 address; 93 } __packed; 94 95 struct acpi_processor_px { 96 u64 core_frequency; /* megahertz */ 97 u64 power; /* milliWatts */ 98 u64 transition_latency; /* microseconds */ 99 u64 bus_master_latency; /* microseconds */ 100 u64 control; /* control value */ 101 u64 status; /* success indicator */ 102 }; 103 104 struct acpi_processor_performance { 105 unsigned int state; 106 unsigned int platform_limit; 107 struct acpi_pct_register control_register; 108 struct acpi_pct_register status_register; 109 unsigned int state_count; 110 struct acpi_processor_px *states; 111 struct acpi_psd_package domain_info; 112 cpumask_var_t shared_cpu_map; 113 unsigned int shared_type; 114 }; 115 116 /* Throttling Control */ 117 118 struct acpi_tsd_package { 119 u64 num_entries; 120 u64 revision; 121 u64 domain; 122 u64 coord_type; 123 u64 num_processors; 124 } __packed; 125 126 struct acpi_ptc_register { 127 u8 descriptor; 128 u16 length; 129 u8 space_id; 130 u8 bit_width; 131 u8 bit_offset; 132 u8 reserved; 133 u64 address; 134 } __packed; 135 136 struct acpi_processor_tx_tss { 137 u64 freqpercentage; /* */ 138 u64 power; /* milliWatts */ 139 u64 transition_latency; /* microseconds */ 140 u64 control; /* control value */ 141 u64 status; /* success indicator */ 142 }; 143 struct acpi_processor_tx { 144 u16 power; 145 u16 performance; 146 }; 147 148 struct acpi_processor; 149 struct acpi_processor_throttling { 150 unsigned int state; 151 unsigned int platform_limit; 152 struct acpi_pct_register control_register; 153 struct acpi_pct_register status_register; 154 unsigned int state_count; 155 struct acpi_processor_tx_tss *states_tss; 156 struct acpi_tsd_package domain_info; 157 cpumask_var_t shared_cpu_map; 158 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); 159 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, 160 int state, bool force); 161 162 u32 address; 163 u8 duty_offset; 164 u8 duty_width; 165 u8 tsd_valid_flag; 166 unsigned int shared_type; 167 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; 168 }; 169 170 /* Limit Interface */ 171 172 struct acpi_processor_lx { 173 int px; /* performance state */ 174 int tx; /* throttle level */ 175 }; 176 177 struct acpi_processor_limit { 178 struct acpi_processor_lx state; /* current limit */ 179 struct acpi_processor_lx thermal; /* thermal limit */ 180 struct acpi_processor_lx user; /* user limit */ 181 }; 182 183 struct acpi_processor_flags { 184 u8 power:1; 185 u8 performance:1; 186 u8 throttling:1; 187 u8 limit:1; 188 u8 bm_control:1; 189 u8 bm_check:1; 190 u8 has_cst:1; 191 u8 power_setup_done:1; 192 u8 bm_rld_set:1; 193 u8 need_hotplug_init:1; 194 }; 195 196 struct acpi_processor { 197 acpi_handle handle; 198 u32 acpi_id; 199 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */ 200 u32 id; /* CPU logical ID allocated by OS */ 201 u32 pblk; 202 int performance_platform_limit; 203 int throttling_platform_limit; 204 /* 0 - states 0..n-th state available */ 205 206 struct acpi_processor_flags flags; 207 struct acpi_processor_power power; 208 struct acpi_processor_performance *performance; 209 struct acpi_processor_throttling throttling; 210 struct acpi_processor_limit limit; 211 struct thermal_cooling_device *cdev; 212 struct device *dev; /* Processor device. */ 213 }; 214 215 struct acpi_processor_errata { 216 u8 smp; 217 struct { 218 u8 throttle:1; 219 u8 fdma:1; 220 u8 reserved:6; 221 u32 bmisx; 222 } piix4; 223 }; 224 225 extern int acpi_processor_preregister_performance(struct 226 acpi_processor_performance 227 __percpu *performance); 228 229 extern int acpi_processor_register_performance(struct acpi_processor_performance 230 *performance, unsigned int cpu); 231 extern void acpi_processor_unregister_performance(unsigned int cpu); 232 233 /* note: this locks both the calling module and the processor module 234 if a _PPC object exists, rmmod is disallowed then */ 235 int acpi_processor_notify_smm(struct module *calling_module); 236 237 /* parsing the _P* objects. */ 238 extern int acpi_processor_get_performance_info(struct acpi_processor *pr); 239 240 /* for communication between multiple parts of the processor kernel module */ 241 DECLARE_PER_CPU(struct acpi_processor *, processors); 242 extern struct acpi_processor_errata errata; 243 244 #ifdef ARCH_HAS_POWER_INIT 245 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 246 unsigned int cpu); 247 int acpi_processor_ffh_cstate_probe(unsigned int cpu, 248 struct acpi_processor_cx *cx, 249 struct acpi_power_register *reg); 250 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 251 #else 252 static inline void acpi_processor_power_init_bm_check(struct 253 acpi_processor_flags 254 *flags, unsigned int cpu) 255 { 256 flags->bm_check = 1; 257 return; 258 } 259 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 260 struct acpi_processor_cx *cx, 261 struct acpi_power_register 262 *reg) 263 { 264 return -1; 265 } 266 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 267 *cstate) 268 { 269 return; 270 } 271 #endif 272 273 /* in processor_perflib.c */ 274 275 #ifdef CONFIG_CPU_FREQ 276 void acpi_processor_ppc_init(void); 277 void acpi_processor_ppc_exit(void); 278 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); 279 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); 280 #else 281 static inline void acpi_processor_ppc_init(void) 282 { 283 return; 284 } 285 static inline void acpi_processor_ppc_exit(void) 286 { 287 return; 288 } 289 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr, 290 int event_flag) 291 { 292 static unsigned int printout = 1; 293 if (printout) { 294 printk(KERN_WARNING 295 "Warning: Processor Platform Limit event detected, but not handled.\n"); 296 printk(KERN_WARNING 297 "Consider compiling CPUfreq support into your kernel.\n"); 298 printout = 0; 299 } 300 return 0; 301 } 302 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) 303 { 304 return -ENODEV; 305 } 306 307 #endif /* CONFIG_CPU_FREQ */ 308 309 /* in processor_core.c */ 310 phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); 311 int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); 312 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); 313 314 /* in processor_pdc.c */ 315 void acpi_processor_set_pdc(acpi_handle handle); 316 317 /* in processor_throttling.c */ 318 #ifdef CONFIG_ACPI_CPU_FREQ_PSS 319 int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 320 int acpi_processor_get_throttling_info(struct acpi_processor *pr); 321 extern int acpi_processor_set_throttling(struct acpi_processor *pr, 322 int state, bool force); 323 /* 324 * Reevaluate whether the T-state is invalid after one cpu is 325 * onlined/offlined. In such case the flags.throttling will be updated. 326 */ 327 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 328 unsigned long action); 329 extern const struct file_operations acpi_processor_throttling_fops; 330 extern void acpi_processor_throttling_init(void); 331 #else 332 static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr) 333 { 334 return 0; 335 } 336 337 static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr) 338 { 339 return -ENODEV; 340 } 341 342 static inline int acpi_processor_set_throttling(struct acpi_processor *pr, 343 int state, bool force) 344 { 345 return -ENODEV; 346 } 347 348 static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, 349 unsigned long action) {} 350 351 static inline void acpi_processor_throttling_init(void) {} 352 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 353 354 /* in processor_idle.c */ 355 extern struct cpuidle_driver acpi_idle_driver; 356 #ifdef CONFIG_ACPI_PROCESSOR_IDLE 357 int acpi_processor_power_init(struct acpi_processor *pr); 358 int acpi_processor_power_exit(struct acpi_processor *pr); 359 int acpi_processor_cst_has_changed(struct acpi_processor *pr); 360 int acpi_processor_hotplug(struct acpi_processor *pr); 361 #else 362 static inline int acpi_processor_power_init(struct acpi_processor *pr) 363 { 364 return -ENODEV; 365 } 366 367 static inline int acpi_processor_power_exit(struct acpi_processor *pr) 368 { 369 return -ENODEV; 370 } 371 372 static inline int acpi_processor_cst_has_changed(struct acpi_processor *pr) 373 { 374 return -ENODEV; 375 } 376 377 static inline int acpi_processor_hotplug(struct acpi_processor *pr) 378 { 379 return -ENODEV; 380 } 381 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ 382 383 #if defined(CONFIG_PM_SLEEP) & defined(CONFIG_ACPI_PROCESSOR_IDLE) 384 void acpi_processor_syscore_init(void); 385 void acpi_processor_syscore_exit(void); 386 #else 387 static inline void acpi_processor_syscore_init(void) {} 388 static inline void acpi_processor_syscore_exit(void) {} 389 #endif 390 391 /* in processor_thermal.c */ 392 int acpi_processor_get_limit_info(struct acpi_processor *pr); 393 extern const struct thermal_cooling_device_ops processor_cooling_ops; 394 #if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ) 395 void acpi_thermal_cpufreq_init(void); 396 void acpi_thermal_cpufreq_exit(void); 397 #else 398 static inline void acpi_thermal_cpufreq_init(void) 399 { 400 return; 401 } 402 static inline void acpi_thermal_cpufreq_exit(void) 403 { 404 return; 405 } 406 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ 407 408 #endif 409