| 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 |