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"
13 #define ACPI_PROCESSOR_BUSY_METRIC 10
15 #define ACPI_PROCESSOR_MAX_POWER 8
16 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
17 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
19 #define ACPI_PROCESSOR_MAX_THROTTLING 16
20 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
21 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
23 #define ACPI_PDC_REVISION_ID 0x1
25 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26 #define ACPI_PSD_REV0_ENTRIES 5
28 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
29 #define ACPI_TSD_REV0_ENTRIES 5
31 * Types of coordination defined in ACPI 3.0. Same macros can be used across
34 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
35 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
36 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
38 #define ACPI_CSTATE_SYSTEMIO 0
39 #define ACPI_CSTATE_FFH 1
40 #define ACPI_CSTATE_HALT 2
42 #define ACPI_CX_DESC_LEN 32
44 /* Power Management */
46 struct acpi_processor_cx;
48 struct acpi_power_register {
58 struct acpi_processor_cx {
66 char desc[ACPI_CX_DESC_LEN];
69 struct acpi_processor_power {
70 struct acpi_processor_cx *state;
71 unsigned long bm_check_timestamp;
74 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
75 int timer_broadcast_on_state;
78 /* Performance Management */
80 struct acpi_psd_package {
88 struct acpi_pct_register {
98 struct acpi_processor_px {
99 u64 core_frequency; /* megahertz */
100 u64 power; /* milliWatts */
101 u64 transition_latency; /* microseconds */
102 u64 bus_master_latency; /* microseconds */
103 u64 control; /* control value */
104 u64 status; /* success indicator */
107 struct acpi_processor_performance {
109 unsigned int platform_limit;
110 struct acpi_pct_register control_register;
111 struct acpi_pct_register status_register;
112 unsigned int state_count;
113 struct acpi_processor_px *states;
114 struct acpi_psd_package domain_info;
115 cpumask_var_t shared_cpu_map;
116 unsigned int shared_type;
119 /* Throttling Control */
121 struct acpi_tsd_package {
129 struct acpi_ptc_register {
139 struct acpi_processor_tx_tss {
140 u64 freqpercentage; /* */
141 u64 power; /* milliWatts */
142 u64 transition_latency; /* microseconds */
143 u64 control; /* control value */
144 u64 status; /* success indicator */
146 struct acpi_processor_tx {
151 struct acpi_processor;
152 struct acpi_processor_throttling {
154 unsigned int platform_limit;
155 struct acpi_pct_register control_register;
156 struct acpi_pct_register status_register;
157 unsigned int state_count;
158 struct acpi_processor_tx_tss *states_tss;
159 struct acpi_tsd_package domain_info;
160 cpumask_var_t shared_cpu_map;
161 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
162 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
163 int state, bool force);
169 unsigned int shared_type;
170 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
173 /* Limit Interface */
175 struct acpi_processor_lx {
176 int px; /* performance state */
177 int tx; /* throttle level */
180 struct acpi_processor_limit {
181 struct acpi_processor_lx state; /* current limit */
182 struct acpi_processor_lx thermal; /* thermal limit */
183 struct acpi_processor_lx user; /* user limit */
186 struct acpi_processor_flags {
194 u8 power_setup_done:1;
196 u8 need_hotplug_init:1;
199 struct acpi_processor {
205 int performance_platform_limit;
206 int throttling_platform_limit;
207 /* 0 - states 0..n-th state available */
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 struct device *dev; /* Processor device. */
218 struct acpi_processor_errata {
228 extern int acpi_processor_preregister_performance(struct
229 acpi_processor_performance
230 __percpu *performance);
232 extern int acpi_processor_register_performance(struct acpi_processor_performance
233 *performance, unsigned int cpu);
234 extern void acpi_processor_unregister_performance(struct
235 acpi_processor_performance
239 /* note: this locks both the calling module and the processor module
240 if a _PPC object exists, rmmod is disallowed then */
241 int acpi_processor_notify_smm(struct module *calling_module);
243 /* parsing the _P* objects. */
244 extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
246 /* for communication between multiple parts of the processor kernel module */
247 DECLARE_PER_CPU(struct acpi_processor *, processors);
248 extern struct acpi_processor_errata errata;
250 #ifdef ARCH_HAS_POWER_INIT
251 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
253 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
254 struct acpi_processor_cx *cx,
255 struct acpi_power_register *reg);
256 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
258 static inline void acpi_processor_power_init_bm_check(struct
260 *flags, unsigned int cpu)
265 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
266 struct acpi_processor_cx *cx,
267 struct acpi_power_register
272 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
279 /* in processor_perflib.c */
281 #ifdef CONFIG_CPU_FREQ
282 void acpi_processor_ppc_init(void);
283 void acpi_processor_ppc_exit(void);
284 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
285 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
287 static inline void acpi_processor_ppc_init(void)
291 static inline void acpi_processor_ppc_exit(void)
295 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
298 static unsigned int printout = 1;
301 "Warning: Processor Platform Limit event detected, but not handled.\n");
303 "Consider compiling CPUfreq support into your kernel.\n");
308 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
313 #endif /* CONFIG_CPU_FREQ */
315 /* in processor_core.c */
316 void acpi_processor_set_pdc(acpi_handle handle);
317 int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
318 int acpi_map_cpuid(int apic_id, u32 acpi_id);
319 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
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);
327 * Reevaluate whether the T-state is invalid after one cpu is
328 * onlined/offlined. In such case the flags.throttling will be updated.
330 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
331 unsigned long action);
332 extern const struct file_operations acpi_processor_throttling_fops;
333 extern void acpi_processor_throttling_init(void);
334 /* in processor_idle.c */
335 int acpi_processor_power_init(struct acpi_processor *pr);
336 int acpi_processor_power_exit(struct acpi_processor *pr);
337 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
338 int acpi_processor_hotplug(struct acpi_processor *pr);
339 extern struct cpuidle_driver acpi_idle_driver;
341 #ifdef CONFIG_PM_SLEEP
342 void acpi_processor_syscore_init(void);
343 void acpi_processor_syscore_exit(void);
345 static inline void acpi_processor_syscore_init(void) {}
346 static inline void acpi_processor_syscore_exit(void) {}
349 /* in processor_thermal.c */
350 int acpi_processor_get_limit_info(struct acpi_processor *pr);
351 extern const struct thermal_cooling_device_ops processor_cooling_ops;
352 #ifdef CONFIG_CPU_FREQ
353 void acpi_thermal_cpufreq_init(void);
354 void acpi_thermal_cpufreq_exit(void);
356 static inline void acpi_thermal_cpufreq_init(void)
360 static inline void acpi_thermal_cpufreq_exit(void)