1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
6 #include <linux/thermal.h>
9 #define ACPI_PROCESSOR_CLASS "processor"
10 #define ACPI_PROCESSOR_DEVICE_NAME "Processor"
11 #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
12 #define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010"
14 #define ACPI_PROCESSOR_BUSY_METRIC 10
16 #define ACPI_PROCESSOR_MAX_POWER 8
17 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
18 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
20 #define ACPI_PROCESSOR_MAX_THROTTLING 16
21 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
22 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
24 #define ACPI_PDC_REVISION_ID 0x1
26 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
27 #define ACPI_PSD_REV0_ENTRIES 5
29 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
30 #define ACPI_TSD_REV0_ENTRIES 5
32 * Types of coordination defined in ACPI 3.0. Same macros can be used across
35 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
36 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
37 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
39 #define ACPI_CSTATE_SYSTEMIO 0
40 #define ACPI_CSTATE_FFH 1
41 #define ACPI_CSTATE_HALT 2
43 #define ACPI_CX_DESC_LEN 32
45 /* Power Management */
47 struct acpi_processor_cx;
49 struct acpi_power_register {
59 struct acpi_processor_cx {
67 char desc[ACPI_CX_DESC_LEN];
70 struct acpi_processor_power {
72 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
73 int timer_broadcast_on_state;
76 /* Performance Management */
78 struct acpi_psd_package {
86 struct acpi_pct_register {
96 struct acpi_processor_px {
97 u64 core_frequency; /* megahertz */
98 u64 power; /* milliWatts */
99 u64 transition_latency; /* microseconds */
100 u64 bus_master_latency; /* microseconds */
101 u64 control; /* control value */
102 u64 status; /* success indicator */
105 struct acpi_processor_performance {
107 unsigned int platform_limit;
108 struct acpi_pct_register control_register;
109 struct acpi_pct_register status_register;
110 unsigned int state_count;
111 struct acpi_processor_px *states;
112 struct acpi_psd_package domain_info;
113 cpumask_var_t shared_cpu_map;
114 unsigned int shared_type;
117 /* Throttling Control */
119 struct acpi_tsd_package {
127 struct acpi_ptc_register {
137 struct acpi_processor_tx_tss {
138 u64 freqpercentage; /* */
139 u64 power; /* milliWatts */
140 u64 transition_latency; /* microseconds */
141 u64 control; /* control value */
142 u64 status; /* success indicator */
144 struct acpi_processor_tx {
149 struct acpi_processor;
150 struct acpi_processor_throttling {
152 unsigned int platform_limit;
153 struct acpi_pct_register control_register;
154 struct acpi_pct_register status_register;
155 unsigned int state_count;
156 struct acpi_processor_tx_tss *states_tss;
157 struct acpi_tsd_package domain_info;
158 cpumask_var_t shared_cpu_map;
159 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
160 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
161 int state, bool force);
167 unsigned int shared_type;
168 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
171 /* Limit Interface */
173 struct acpi_processor_lx {
174 int px; /* performance state */
175 int tx; /* throttle level */
178 struct acpi_processor_limit {
179 struct acpi_processor_lx state; /* current limit */
180 struct acpi_processor_lx thermal; /* thermal limit */
181 struct acpi_processor_lx user; /* user limit */
184 struct acpi_processor_flags {
192 u8 power_setup_done:1;
194 u8 need_hotplug_init:1;
197 struct acpi_processor {
200 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */
201 u32 id; /* CPU logical ID allocated by OS */
203 int performance_platform_limit;
204 int throttling_platform_limit;
205 /* 0 - states 0..n-th state available */
207 struct acpi_processor_flags flags;
208 struct acpi_processor_power power;
209 struct acpi_processor_performance *performance;
210 struct acpi_processor_throttling throttling;
211 struct acpi_processor_limit limit;
212 struct thermal_cooling_device *cdev;
213 struct device *dev; /* Processor device. */
216 struct acpi_processor_errata {
226 extern int acpi_processor_preregister_performance(struct
227 acpi_processor_performance
228 __percpu *performance);
230 extern int acpi_processor_register_performance(struct acpi_processor_performance
231 *performance, unsigned int cpu);
232 extern void acpi_processor_unregister_performance(unsigned int cpu);
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);
238 /* parsing the _P* objects. */
239 extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
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;
245 #ifdef ARCH_HAS_POWER_INIT
246 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
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);
253 static inline void acpi_processor_power_init_bm_check(struct
255 *flags, unsigned int cpu)
260 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
261 struct acpi_processor_cx *cx,
262 struct acpi_power_register
267 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
274 /* in processor_perflib.c */
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);
282 static inline void acpi_processor_ppc_init(void)
286 static inline void acpi_processor_ppc_exit(void)
290 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
293 static unsigned int printout = 1;
296 "Warning: Processor Platform Limit event detected, but not handled.\n");
298 "Consider compiling CPUfreq support into your kernel.\n");
303 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
308 #endif /* CONFIG_CPU_FREQ */
310 /* in processor_core.c */
311 phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
312 int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
313 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
315 #ifdef CONFIG_ACPI_CPPC_LIB
316 extern int acpi_cppc_processor_probe(struct acpi_processor *pr);
317 extern void acpi_cppc_processor_exit(struct acpi_processor *pr);
319 static inline int acpi_cppc_processor_probe(struct acpi_processor *pr)
323 static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
327 #endif /* CONFIG_ACPI_CPPC_LIB */
329 /* in processor_pdc.c */
330 void acpi_processor_set_pdc(acpi_handle handle);
332 /* in processor_throttling.c */
333 #ifdef CONFIG_ACPI_CPU_FREQ_PSS
334 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
335 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
336 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
337 int state, bool force);
339 * Reevaluate whether the T-state is invalid after one cpu is
340 * onlined/offlined. In such case the flags.throttling will be updated.
342 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
343 unsigned long action);
344 extern const struct file_operations acpi_processor_throttling_fops;
345 extern void acpi_processor_throttling_init(void);
347 static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
352 static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr)
357 static inline int acpi_processor_set_throttling(struct acpi_processor *pr,
358 int state, bool force)
363 static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
364 unsigned long action) {}
366 static inline void acpi_processor_throttling_init(void) {}
367 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */
369 /* in processor_idle.c */
370 extern struct cpuidle_driver acpi_idle_driver;
371 #ifdef CONFIG_ACPI_PROCESSOR_IDLE
372 int acpi_processor_power_init(struct acpi_processor *pr);
373 int acpi_processor_power_exit(struct acpi_processor *pr);
374 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
375 int acpi_processor_hotplug(struct acpi_processor *pr);
377 static inline int acpi_processor_power_init(struct acpi_processor *pr)
382 static inline int acpi_processor_power_exit(struct acpi_processor *pr)
387 static inline int acpi_processor_cst_has_changed(struct acpi_processor *pr)
392 static inline int acpi_processor_hotplug(struct acpi_processor *pr)
396 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */
398 /* in processor_thermal.c */
399 int acpi_processor_get_limit_info(struct acpi_processor *pr);
400 extern const struct thermal_cooling_device_ops processor_cooling_ops;
401 #if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ)
402 void acpi_thermal_cpufreq_init(void);
403 void acpi_thermal_cpufreq_exit(void);
405 static inline void acpi_thermal_cpufreq_init(void)
409 static inline void acpi_thermal_cpufreq_exit(void)
413 #endif /* CONFIG_ACPI_CPU_FREQ_PSS */