1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
6 #include <linux/cpuidle.h>
7 #include <linux/thermal.h>
10 #define ACPI_PROCESSOR_BUSY_METRIC 10
12 #define ACPI_PROCESSOR_MAX_POWER 8
13 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
14 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
16 #define ACPI_PROCESSOR_MAX_THROTTLING 16
17 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
18 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
20 #define ACPI_PDC_REVISION_ID 0x1
22 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
23 #define ACPI_PSD_REV0_ENTRIES 5
25 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26 #define ACPI_TSD_REV0_ENTRIES 5
28 * Types of coordination defined in ACPI 3.0. Same macros can be used across
31 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
32 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
33 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
35 #define ACPI_CSTATE_SYSTEMIO 0
36 #define ACPI_CSTATE_FFH 1
37 #define ACPI_CSTATE_HALT 2
39 #define ACPI_CX_DESC_LEN 32
41 /* Power Management */
43 struct acpi_processor_cx;
45 struct acpi_power_register {
53 } __attribute__ ((packed));
55 struct acpi_processor_cx {
67 char desc[ACPI_CX_DESC_LEN];
70 struct acpi_processor_power {
71 struct cpuidle_device dev;
72 struct acpi_processor_cx *state;
73 unsigned long bm_check_timestamp;
76 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
77 int timer_broadcast_on_state;
80 /* Performance Management */
82 struct acpi_psd_package {
88 } __attribute__ ((packed));
90 struct acpi_pct_register {
98 } __attribute__ ((packed));
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 */
109 struct acpi_processor_performance {
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;
121 /* Throttling Control */
123 struct acpi_tsd_package {
129 } __attribute__ ((packed));
131 struct acpi_ptc_register {
139 } __attribute__ ((packed));
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 */
148 struct acpi_processor_tx {
153 struct acpi_processor;
154 struct acpi_processor_throttling {
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);
171 unsigned int shared_type;
172 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
175 /* Limit Interface */
177 struct acpi_processor_lx {
178 int px; /* performance state */
179 int tx; /* throttle level */
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 */
188 struct acpi_processor_flags {
196 u8 power_setup_done:1;
200 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;
217 struct acpi_processor_errata {
227 extern int acpi_processor_preregister_performance(struct
228 acpi_processor_performance
229 __percpu *performance);
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
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);
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;
246 #ifdef ARCH_HAS_POWER_INIT
247 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
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);
254 static inline void acpi_processor_power_init_bm_check(struct
256 *flags, unsigned int cpu)
261 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
262 struct acpi_processor_cx *cx,
263 struct acpi_power_register
268 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
275 /* in processor_perflib.c */
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);
283 static inline void acpi_processor_ppc_init(void)
287 static inline void acpi_processor_ppc_exit(void)
291 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
294 static unsigned int printout = 1;
297 "Warning: Processor Platform Limit event detected, but not handled.\n");
299 "Consider compiling CPUfreq support into your kernel.\n");
304 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
309 #endif /* CONFIG_CPU_FREQ */
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);
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);
321 * Reevaluate whether the T-state is invalid after one cpu is
322 * onlined/offlined. In such case the flags.throttling will be updated.
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;
338 /* in processor_thermal.c */
339 int acpi_processor_get_limit_info(struct acpi_processor *pr);
340 extern 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);
345 static inline void acpi_thermal_cpufreq_init(void)
349 static inline void acpi_thermal_cpufreq_exit(void)