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 reserved; 52 u64 address; 53 } __attribute__ ((packed)); 54 55 struct acpi_processor_cx_policy { 56 u32 count; 57 struct acpi_processor_cx *state; 58 struct { 59 u32 time; 60 u32 ticks; 61 u32 count; 62 u32 bm; 63 } threshold; 64 }; 65 66 struct acpi_processor_cx { 67 u8 valid; 68 u8 type; 69 u32 address; 70 u8 entry_method; 71 u8 index; 72 u32 latency; 73 u32 latency_ticks; 74 u32 power; 75 u32 usage; 76 u64 time; 77 struct acpi_processor_cx_policy promotion; 78 struct acpi_processor_cx_policy demotion; 79 char desc[ACPI_CX_DESC_LEN]; 80 }; 81 82 struct acpi_processor_power { 83 struct cpuidle_device dev; 84 struct acpi_processor_cx *state; 85 unsigned long bm_check_timestamp; 86 u32 default_state; 87 int count; 88 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; 89 int timer_broadcast_on_state; 90 }; 91 92 /* Performance Management */ 93 94 struct acpi_psd_package { 95 acpi_integer num_entries; 96 acpi_integer revision; 97 acpi_integer domain; 98 acpi_integer coord_type; 99 acpi_integer num_processors; 100 } __attribute__ ((packed)); 101 102 struct acpi_pct_register { 103 u8 descriptor; 104 u16 length; 105 u8 space_id; 106 u8 bit_width; 107 u8 bit_offset; 108 u8 reserved; 109 u64 address; 110 } __attribute__ ((packed)); 111 112 struct acpi_processor_px { 113 acpi_integer core_frequency; /* megahertz */ 114 acpi_integer power; /* milliWatts */ 115 acpi_integer transition_latency; /* microseconds */ 116 acpi_integer bus_master_latency; /* microseconds */ 117 acpi_integer control; /* control value */ 118 acpi_integer status; /* success indicator */ 119 }; 120 121 struct acpi_processor_performance { 122 unsigned int state; 123 unsigned int platform_limit; 124 struct acpi_pct_register control_register; 125 struct acpi_pct_register status_register; 126 unsigned int state_count; 127 struct acpi_processor_px *states; 128 struct acpi_psd_package domain_info; 129 cpumask_var_t shared_cpu_map; 130 unsigned int shared_type; 131 }; 132 133 /* Throttling Control */ 134 135 struct acpi_tsd_package { 136 acpi_integer num_entries; 137 acpi_integer revision; 138 acpi_integer domain; 139 acpi_integer coord_type; 140 acpi_integer num_processors; 141 } __attribute__ ((packed)); 142 143 struct acpi_ptc_register { 144 u8 descriptor; 145 u16 length; 146 u8 space_id; 147 u8 bit_width; 148 u8 bit_offset; 149 u8 reserved; 150 u64 address; 151 } __attribute__ ((packed)); 152 153 struct acpi_processor_tx_tss { 154 acpi_integer freqpercentage; /* */ 155 acpi_integer power; /* milliWatts */ 156 acpi_integer transition_latency; /* microseconds */ 157 acpi_integer control; /* control value */ 158 acpi_integer status; /* success indicator */ 159 }; 160 struct acpi_processor_tx { 161 u16 power; 162 u16 performance; 163 }; 164 165 struct acpi_processor; 166 struct acpi_processor_throttling { 167 unsigned int state; 168 unsigned int platform_limit; 169 struct acpi_pct_register control_register; 170 struct acpi_pct_register status_register; 171 unsigned int state_count; 172 struct acpi_processor_tx_tss *states_tss; 173 struct acpi_tsd_package domain_info; 174 cpumask_var_t shared_cpu_map; 175 int (*acpi_processor_get_throttling) (struct acpi_processor * pr); 176 int (*acpi_processor_set_throttling) (struct acpi_processor * pr, 177 int state, bool force); 178 179 u32 address; 180 u8 duty_offset; 181 u8 duty_width; 182 u8 tsd_valid_flag; 183 unsigned int shared_type; 184 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; 185 }; 186 187 /* Limit Interface */ 188 189 struct acpi_processor_lx { 190 int px; /* performance state */ 191 int tx; /* throttle level */ 192 }; 193 194 struct acpi_processor_limit { 195 struct acpi_processor_lx state; /* current limit */ 196 struct acpi_processor_lx thermal; /* thermal limit */ 197 struct acpi_processor_lx user; /* user limit */ 198 }; 199 200 struct acpi_processor_flags { 201 u8 power:1; 202 u8 performance:1; 203 u8 throttling:1; 204 u8 limit:1; 205 u8 bm_control:1; 206 u8 bm_check:1; 207 u8 has_cst:1; 208 u8 power_setup_done:1; 209 u8 bm_rld_set:1; 210 }; 211 212 struct acpi_processor { 213 acpi_handle handle; 214 u32 acpi_id; 215 u32 id; 216 u32 pblk; 217 int performance_platform_limit; 218 int throttling_platform_limit; 219 /* 0 - states 0..n-th state available */ 220 221 struct acpi_processor_flags flags; 222 struct acpi_processor_power power; 223 struct acpi_processor_performance *performance; 224 struct acpi_processor_throttling throttling; 225 struct acpi_processor_limit limit; 226 struct thermal_cooling_device *cdev; 227 /* the _PDC objects for this processor, if any */ 228 struct acpi_object_list *pdc; 229 }; 230 231 struct acpi_processor_errata { 232 u8 smp; 233 struct { 234 u8 throttle:1; 235 u8 fdma:1; 236 u8 reserved:6; 237 u32 bmisx; 238 } piix4; 239 }; 240 241 extern int acpi_processor_preregister_performance(struct 242 acpi_processor_performance 243 *performance); 244 245 extern int acpi_processor_register_performance(struct acpi_processor_performance 246 *performance, unsigned int cpu); 247 extern void acpi_processor_unregister_performance(struct 248 acpi_processor_performance 249 *performance, 250 unsigned int cpu); 251 252 /* note: this locks both the calling module and the processor module 253 if a _PPC object exists, rmmod is disallowed then */ 254 int acpi_processor_notify_smm(struct module *calling_module); 255 256 /* for communication between multiple parts of the processor kernel module */ 257 DECLARE_PER_CPU(struct acpi_processor *, processors); 258 extern struct acpi_processor_errata errata; 259 260 void arch_acpi_processor_init_pdc(struct acpi_processor *pr); 261 void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr); 262 263 #ifdef ARCH_HAS_POWER_INIT 264 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, 265 unsigned int cpu); 266 int acpi_processor_ffh_cstate_probe(unsigned int cpu, 267 struct acpi_processor_cx *cx, 268 struct acpi_power_register *reg); 269 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); 270 #else 271 static inline void acpi_processor_power_init_bm_check(struct 272 acpi_processor_flags 273 *flags, unsigned int cpu) 274 { 275 flags->bm_check = 1; 276 return; 277 } 278 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, 279 struct acpi_processor_cx *cx, 280 struct acpi_power_register 281 *reg) 282 { 283 return -1; 284 } 285 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx 286 *cstate) 287 { 288 return; 289 } 290 #endif 291 292 /* in processor_perflib.c */ 293 294 #ifdef CONFIG_CPU_FREQ 295 void acpi_processor_ppc_init(void); 296 void acpi_processor_ppc_exit(void); 297 int acpi_processor_ppc_has_changed(struct acpi_processor *pr); 298 #else 299 static inline void acpi_processor_ppc_init(void) 300 { 301 return; 302 } 303 static inline void acpi_processor_ppc_exit(void) 304 { 305 return; 306 } 307 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) 308 { 309 static unsigned int printout = 1; 310 if (printout) { 311 printk(KERN_WARNING 312 "Warning: Processor Platform Limit event detected, but not handled.\n"); 313 printk(KERN_WARNING 314 "Consider compiling CPUfreq support into your kernel.\n"); 315 printout = 0; 316 } 317 return 0; 318 } 319 #endif /* CONFIG_CPU_FREQ */ 320 321 /* in processor_throttling.c */ 322 int acpi_processor_tstate_has_changed(struct acpi_processor *pr); 323 int acpi_processor_get_throttling_info(struct acpi_processor *pr); 324 extern int acpi_processor_set_throttling(struct acpi_processor *pr, 325 int state, bool force); 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 file_operations acpi_processor_limit_fops; 341 extern struct thermal_cooling_device_ops processor_cooling_ops; 342 #ifdef CONFIG_CPU_FREQ 343 void acpi_thermal_cpufreq_init(void); 344 void acpi_thermal_cpufreq_exit(void); 345 #else 346 static inline void acpi_thermal_cpufreq_init(void) 347 { 348 return; 349 } 350 static inline void acpi_thermal_cpufreq_exit(void) 351 { 352 return; 353 } 354 #endif 355 356 #endif 357