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