1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
6 #include <linux/thermal.h>
9 #define ACPI_PROCESSOR_BUSY_METRIC 10
11 #define ACPI_PROCESSOR_MAX_POWER 8
12 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
13 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
15 #define ACPI_PROCESSOR_MAX_THROTTLING 16
16 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
17 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
19 #define ACPI_PDC_REVISION_ID 0x1
21 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
22 #define ACPI_PSD_REV0_ENTRIES 5
24 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
25 #define ACPI_TSD_REV0_ENTRIES 5
27 * Types of coordination defined in ACPI 3.0. Same macros can be used across
30 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
31 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
32 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
34 #define ACPI_CSTATE_SYSTEMIO 0
35 #define ACPI_CSTATE_FFH 1
36 #define ACPI_CSTATE_HALT 2
38 #define ACPI_CX_DESC_LEN 32
40 /* Power Management */
42 struct acpi_processor_cx;
44 struct acpi_power_register {
52 } __attribute__ ((packed));
54 struct acpi_processor_cx {
62 char desc[ACPI_CX_DESC_LEN];
65 struct acpi_processor_power {
66 struct acpi_processor_cx *state;
67 unsigned long bm_check_timestamp;
70 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
71 int timer_broadcast_on_state;
74 /* Performance Management */
76 struct acpi_psd_package {
82 } __attribute__ ((packed));
84 struct acpi_pct_register {
92 } __attribute__ ((packed));
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 */
103 struct acpi_processor_performance {
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;
115 /* Throttling Control */
117 struct acpi_tsd_package {
123 } __attribute__ ((packed));
125 struct acpi_ptc_register {
133 } __attribute__ ((packed));
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 */
142 struct acpi_processor_tx {
147 struct acpi_processor;
148 struct acpi_processor_throttling {
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);
165 unsigned int shared_type;
166 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
169 /* Limit Interface */
171 struct acpi_processor_lx {
172 int px; /* performance state */
173 int tx; /* throttle level */
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 */
182 struct acpi_processor_flags {
190 u8 power_setup_done:1;
192 u8 need_hotplug_init:1;
195 struct acpi_processor {
200 int performance_platform_limit;
201 int throttling_platform_limit;
202 /* 0 - states 0..n-th state available */
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;
212 struct acpi_processor_errata {
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);
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
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 void acpi_processor_set_pdc(acpi_handle handle);
312 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
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);
320 * Reevaluate whether the T-state is invalid after one cpu is
321 * onlined/offlined. In such case the flags.throttling will be updated.
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;
334 #ifdef CONFIG_PM_SLEEP
335 void acpi_processor_syscore_init(void);
336 void acpi_processor_syscore_exit(void);
338 static inline void acpi_processor_syscore_init(void) {}
339 static inline void acpi_processor_syscore_exit(void) {}
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);
349 static inline void acpi_thermal_cpufreq_init(void)
353 static inline void acpi_thermal_cpufreq_exit(void)