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 {
71 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
72 int timer_broadcast_on_state;
75 /* Performance Management */
77 struct acpi_psd_package {
85 struct acpi_pct_register {
95 struct acpi_processor_px {
96 u64 core_frequency; /* megahertz */
97 u64 power; /* milliWatts */
98 u64 transition_latency; /* microseconds */
99 u64 bus_master_latency; /* microseconds */
100 u64 control; /* control value */
101 u64 status; /* success indicator */
104 struct acpi_processor_performance {
106 unsigned int platform_limit;
107 struct acpi_pct_register control_register;
108 struct acpi_pct_register status_register;
109 unsigned int state_count;
110 struct acpi_processor_px *states;
111 struct acpi_psd_package domain_info;
112 cpumask_var_t shared_cpu_map;
113 unsigned int shared_type;
116 /* Throttling Control */
118 struct acpi_tsd_package {
126 struct acpi_ptc_register {
136 struct acpi_processor_tx_tss {
137 u64 freqpercentage; /* */
138 u64 power; /* milliWatts */
139 u64 transition_latency; /* microseconds */
140 u64 control; /* control value */
141 u64 status; /* success indicator */
143 struct acpi_processor_tx {
148 struct acpi_processor;
149 struct acpi_processor_throttling {
151 unsigned int platform_limit;
152 struct acpi_pct_register control_register;
153 struct acpi_pct_register status_register;
154 unsigned int state_count;
155 struct acpi_processor_tx_tss *states_tss;
156 struct acpi_tsd_package domain_info;
157 cpumask_var_t shared_cpu_map;
158 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
159 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
160 int state, bool force);
166 unsigned int shared_type;
167 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
170 /* Limit Interface */
172 struct acpi_processor_lx {
173 int px; /* performance state */
174 int tx; /* throttle level */
177 struct acpi_processor_limit {
178 struct acpi_processor_lx state; /* current limit */
179 struct acpi_processor_lx thermal; /* thermal limit */
180 struct acpi_processor_lx user; /* user limit */
183 struct acpi_processor_flags {
191 u8 power_setup_done:1;
193 u8 need_hotplug_init:1;
196 struct acpi_processor {
199 u32 phys_id; /* CPU hardware ID such as APIC ID for x86 */
200 u32 id; /* CPU logical ID allocated by OS */
202 int performance_platform_limit;
203 int throttling_platform_limit;
204 /* 0 - states 0..n-th state available */
206 struct acpi_processor_flags flags;
207 struct acpi_processor_power power;
208 struct acpi_processor_performance *performance;
209 struct acpi_processor_throttling throttling;
210 struct acpi_processor_limit limit;
211 struct thermal_cooling_device *cdev;
212 struct device *dev; /* Processor device. */
215 struct acpi_processor_errata {
225 extern int acpi_processor_preregister_performance(struct
226 acpi_processor_performance
227 __percpu *performance);
229 extern int acpi_processor_register_performance(struct acpi_processor_performance
230 *performance, unsigned int cpu);
231 extern void acpi_processor_unregister_performance(struct
232 acpi_processor_performance
236 /* note: this locks both the calling module and the processor module
237 if a _PPC object exists, rmmod is disallowed then */
238 int acpi_processor_notify_smm(struct module *calling_module);
240 /* parsing the _P* objects. */
241 extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
243 /* for communication between multiple parts of the processor kernel module */
244 DECLARE_PER_CPU(struct acpi_processor *, processors);
245 extern struct acpi_processor_errata errata;
247 #ifdef ARCH_HAS_POWER_INIT
248 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
250 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
251 struct acpi_processor_cx *cx,
252 struct acpi_power_register *reg);
253 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
255 static inline void acpi_processor_power_init_bm_check(struct
257 *flags, unsigned int cpu)
262 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
263 struct acpi_processor_cx *cx,
264 struct acpi_power_register
269 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
276 /* in processor_perflib.c */
278 #ifdef CONFIG_CPU_FREQ
279 void acpi_processor_ppc_init(void);
280 void acpi_processor_ppc_exit(void);
281 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
282 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
284 static inline void acpi_processor_ppc_init(void)
288 static inline void acpi_processor_ppc_exit(void)
292 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
295 static unsigned int printout = 1;
298 "Warning: Processor Platform Limit event detected, but not handled.\n");
300 "Consider compiling CPUfreq support into your kernel.\n");
305 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
310 #endif /* CONFIG_CPU_FREQ */
312 /* in processor_core.c */
313 int acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
314 int acpi_map_cpuid(int phys_id, u32 acpi_id);
315 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
317 /* in processor_pdc.c */
318 void acpi_processor_set_pdc(acpi_handle handle);
320 /* in processor_throttling.c */
321 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
322 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
323 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
324 int state, bool force);
326 * Reevaluate whether the T-state is invalid after one cpu is
327 * onlined/offlined. In such case the flags.throttling will be updated.
329 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
330 unsigned long action);
331 extern const struct file_operations acpi_processor_throttling_fops;
332 extern void acpi_processor_throttling_init(void);
333 /* in processor_idle.c */
334 int acpi_processor_power_init(struct acpi_processor *pr);
335 int acpi_processor_power_exit(struct acpi_processor *pr);
336 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
337 int acpi_processor_hotplug(struct acpi_processor *pr);
338 extern struct cpuidle_driver acpi_idle_driver;
340 #ifdef CONFIG_PM_SLEEP
341 void acpi_processor_syscore_init(void);
342 void acpi_processor_syscore_exit(void);
344 static inline void acpi_processor_syscore_init(void) {}
345 static inline void acpi_processor_syscore_exit(void) {}
348 /* in processor_thermal.c */
349 int acpi_processor_get_limit_info(struct acpi_processor *pr);
350 extern const struct thermal_cooling_device_ops processor_cooling_ops;
351 #ifdef CONFIG_CPU_FREQ
352 void acpi_thermal_cpufreq_init(void);
353 void acpi_thermal_cpufreq_exit(void);
355 static inline void acpi_thermal_cpufreq_init(void)
359 static inline void acpi_thermal_cpufreq_exit(void)