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