| 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 |