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_policy {
57 struct acpi_processor_cx *state;
66 struct acpi_processor_cx {
77 struct acpi_processor_cx_policy promotion;
78 struct acpi_processor_cx_policy demotion;
79 char desc[ACPI_CX_DESC_LEN];
82 struct acpi_processor_power {
83 struct cpuidle_device dev;
84 struct acpi_processor_cx *state;
85 unsigned long bm_check_timestamp;
88 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
89 int timer_broadcast_on_state;
92 /* Performance Management */
94 struct acpi_psd_package {
100 } __attribute__ ((packed));
102 struct acpi_pct_register {
110 } __attribute__ ((packed));
112 struct acpi_processor_px {
113 u64 core_frequency; /* megahertz */
114 u64 power; /* milliWatts */
115 u64 transition_latency; /* microseconds */
116 u64 bus_master_latency; /* microseconds */
117 u64 control; /* control value */
118 u64 status; /* success indicator */
121 struct acpi_processor_performance {
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;
133 /* Throttling Control */
135 struct acpi_tsd_package {
141 } __attribute__ ((packed));
143 struct acpi_ptc_register {
151 } __attribute__ ((packed));
153 struct acpi_processor_tx_tss {
154 u64 freqpercentage; /* */
155 u64 power; /* milliWatts */
156 u64 transition_latency; /* microseconds */
157 u64 control; /* control value */
158 u64 status; /* success indicator */
160 struct acpi_processor_tx {
165 struct acpi_processor;
166 struct acpi_processor_throttling {
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);
183 unsigned int shared_type;
184 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
187 /* Limit Interface */
189 struct acpi_processor_lx {
190 int px; /* performance state */
191 int tx; /* throttle level */
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 */
200 struct acpi_processor_flags {
208 u8 power_setup_done:1;
212 struct acpi_processor {
217 int performance_platform_limit;
218 int throttling_platform_limit;
219 /* 0 - states 0..n-th state available */
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;
229 struct acpi_processor_errata {
239 extern int acpi_processor_preregister_performance(struct
240 acpi_processor_performance
241 __percpu *performance);
243 extern int acpi_processor_register_performance(struct acpi_processor_performance
244 *performance, unsigned int cpu);
245 extern void acpi_processor_unregister_performance(struct
246 acpi_processor_performance
250 /* note: this locks both the calling module and the processor module
251 if a _PPC object exists, rmmod is disallowed then */
252 int acpi_processor_notify_smm(struct module *calling_module);
254 /* for communication between multiple parts of the processor kernel module */
255 DECLARE_PER_CPU(struct acpi_processor *, processors);
256 extern struct acpi_processor_errata errata;
258 #ifdef ARCH_HAS_POWER_INIT
259 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
261 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
262 struct acpi_processor_cx *cx,
263 struct acpi_power_register *reg);
264 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
266 static inline void acpi_processor_power_init_bm_check(struct
268 *flags, unsigned int cpu)
273 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
274 struct acpi_processor_cx *cx,
275 struct acpi_power_register
280 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
287 /* in processor_perflib.c */
289 #ifdef CONFIG_CPU_FREQ
290 void acpi_processor_ppc_init(void);
291 void acpi_processor_ppc_exit(void);
292 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
293 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
295 static inline void acpi_processor_ppc_init(void)
299 static inline void acpi_processor_ppc_exit(void)
303 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
306 static unsigned int printout = 1;
309 "Warning: Processor Platform Limit event detected, but not handled.\n");
311 "Consider compiling CPUfreq support into your kernel.\n");
316 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
321 #endif /* CONFIG_CPU_FREQ */
323 /* in processor_core.c */
324 void acpi_processor_set_pdc(acpi_handle handle);
326 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
328 static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
334 /* in processor_throttling.c */
335 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
336 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
337 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
338 int state, bool force);
339 extern const struct file_operations acpi_processor_throttling_fops;
340 extern void acpi_processor_throttling_init(void);
341 /* in processor_idle.c */
342 int acpi_processor_power_init(struct acpi_processor *pr,
343 struct acpi_device *device);
344 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
345 int acpi_processor_power_exit(struct acpi_processor *pr,
346 struct acpi_device *device);
347 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
348 int acpi_processor_resume(struct acpi_device * device);
349 extern struct cpuidle_driver acpi_idle_driver;
351 /* in processor_thermal.c */
352 int acpi_processor_get_limit_info(struct acpi_processor *pr);
353 extern const struct file_operations acpi_processor_limit_fops;
354 extern struct thermal_cooling_device_ops processor_cooling_ops;
355 #ifdef CONFIG_CPU_FREQ
356 void acpi_thermal_cpufreq_init(void);
357 void acpi_thermal_cpufreq_exit(void);
359 static inline void acpi_thermal_cpufreq_init(void)
363 static inline void acpi_thermal_cpufreq_exit(void)