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1#ifndef __ACPI_PROCESSOR_H
2#define __ACPI_PROCESSOR_H
3
4#include <linux/kernel.h>
5#include <linux/cpu.h>
6#include <linux/cpuidle.h>
7#include <linux/thermal.h>
8#include <asm/acpi.h>
9
10#define ACPI_PROCESSOR_BUSY_METRIC 10
11
12#define ACPI_PROCESSOR_MAX_POWER 8
13#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
14#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
15
16#define ACPI_PROCESSOR_MAX_THROTTLING 16
17#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
18#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
19
20#define ACPI_PDC_REVISION_ID 0x1
21
22#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
23#define ACPI_PSD_REV0_ENTRIES 5
24
25#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26#define ACPI_TSD_REV0_ENTRIES 5
27/*
28 * Types of coordination defined in ACPI 3.0. Same macros can be used across
29 * P, C and T states
30 */
31#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
32#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
33#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
34
35#define ACPI_CSTATE_SYSTEMIO 0
36#define ACPI_CSTATE_FFH 1
37#define ACPI_CSTATE_HALT 2
38
39#define ACPI_CX_DESC_LEN 32
40
41/* Power Management */
42
43struct acpi_processor_cx;
44
45struct acpi_power_register {
46 u8 descriptor;
47 u16 length;
48 u8 space_id;
49 u8 bit_width;
50 u8 bit_offset;
51 u8 access_size;
52 u64 address;
53} __attribute__ ((packed));
54
55struct acpi_processor_cx {
56 u8 valid;
57 u8 type;
58 u32 address;
59 u8 entry_method;
60 u8 index;
61 u32 latency;
62 u32 latency_ticks;
63 u32 power;
64 u32 usage;
65 u64 time;
66 u8 bm_sts_skip;
67 char desc[ACPI_CX_DESC_LEN];
68};
69
70struct acpi_processor_power {
71 struct cpuidle_device dev;
72 struct acpi_processor_cx *state;
73 unsigned long bm_check_timestamp;
74 u32 default_state;
75 int count;
76 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
77 int timer_broadcast_on_state;
78};
79
80/* Performance Management */
81
82struct acpi_psd_package {
83 u64 num_entries;
84 u64 revision;
85 u64 domain;
86 u64 coord_type;
87 u64 num_processors;
88} __attribute__ ((packed));
89
90struct acpi_pct_register {
91 u8 descriptor;
92 u16 length;
93 u8 space_id;
94 u8 bit_width;
95 u8 bit_offset;
96 u8 reserved;
97 u64 address;
98} __attribute__ ((packed));
99
100struct 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 */
107};
108
109struct acpi_processor_performance {
110 unsigned int state;
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;
119};
120
121/* Throttling Control */
122
123struct acpi_tsd_package {
124 u64 num_entries;
125 u64 revision;
126 u64 domain;
127 u64 coord_type;
128 u64 num_processors;
129} __attribute__ ((packed));
130
131struct acpi_ptc_register {
132 u8 descriptor;
133 u16 length;
134 u8 space_id;
135 u8 bit_width;
136 u8 bit_offset;
137 u8 reserved;
138 u64 address;
139} __attribute__ ((packed));
140
141struct 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 */
147};
148struct acpi_processor_tx {
149 u16 power;
150 u16 performance;
151};
152
153struct acpi_processor;
154struct acpi_processor_throttling {
155 unsigned int state;
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);
166
167 u32 address;
168 u8 duty_offset;
169 u8 duty_width;
170 u8 tsd_valid_flag;
171 unsigned int shared_type;
172 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
173};
174
175/* Limit Interface */
176
177struct acpi_processor_lx {
178 int px; /* performance state */
179 int tx; /* throttle level */
180};
181
182struct 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 */
186};
187
188struct acpi_processor_flags {
189 u8 power:1;
190 u8 performance:1;
191 u8 throttling:1;
192 u8 limit:1;
193 u8 bm_control:1;
194 u8 bm_check:1;
195 u8 has_cst:1;
196 u8 power_setup_done:1;
197 u8 bm_rld_set:1;
198};
199
200struct acpi_processor {
201 acpi_handle handle;
202 u32 acpi_id;
203 u32 id;
204 u32 pblk;
205 int performance_platform_limit;
206 int throttling_platform_limit;
207 /* 0 - states 0..n-th state available */
208
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};
216
217struct acpi_processor_errata {
218 u8 smp;
219 struct {
220 u8 throttle:1;
221 u8 fdma:1;
222 u8 reserved:6;
223 u32 bmisx;
224 } piix4;
225};
226
227extern int acpi_processor_preregister_performance(struct
228 acpi_processor_performance
229 __percpu *performance);
230
231extern int acpi_processor_register_performance(struct acpi_processor_performance
232 *performance, unsigned int cpu);
233extern void acpi_processor_unregister_performance(struct
234 acpi_processor_performance
235 *performance,
236 unsigned int cpu);
237
238/* note: this locks both the calling module and the processor module
239 if a _PPC object exists, rmmod is disallowed then */
240int acpi_processor_notify_smm(struct module *calling_module);
241
242/* for communication between multiple parts of the processor kernel module */
243DECLARE_PER_CPU(struct acpi_processor *, processors);
244extern struct acpi_processor_errata errata;
245
246#ifdef ARCH_HAS_POWER_INIT
247void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
248 unsigned int cpu);
249int acpi_processor_ffh_cstate_probe(unsigned int cpu,
250 struct acpi_processor_cx *cx,
251 struct acpi_power_register *reg);
252void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
253#else
254static inline void acpi_processor_power_init_bm_check(struct
255 acpi_processor_flags
256 *flags, unsigned int cpu)
257{
258 flags->bm_check = 1;
259 return;
260}
261static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
262 struct acpi_processor_cx *cx,
263 struct acpi_power_register
264 *reg)
265{
266 return -1;
267}
268static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
269 *cstate)
270{
271 return;
272}
273#endif
274
275/* in processor_perflib.c */
276
277#ifdef CONFIG_CPU_FREQ
278void acpi_processor_ppc_init(void);
279void acpi_processor_ppc_exit(void);
280int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
281extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
282#else
283static inline void acpi_processor_ppc_init(void)
284{
285 return;
286}
287static inline void acpi_processor_ppc_exit(void)
288{
289 return;
290}
291static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
292 int event_flag)
293{
294 static unsigned int printout = 1;
295 if (printout) {
296 printk(KERN_WARNING
297 "Warning: Processor Platform Limit event detected, but not handled.\n");
298 printk(KERN_WARNING
299 "Consider compiling CPUfreq support into your kernel.\n");
300 printout = 0;
301 }
302 return 0;
303}
304static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
305{
306 return -ENODEV;
307}
308
309#endif /* CONFIG_CPU_FREQ */
310
311/* in processor_core.c */
312void acpi_processor_set_pdc(acpi_handle handle);
313int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
314
315/* in processor_throttling.c */
316int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
317int acpi_processor_get_throttling_info(struct acpi_processor *pr);
318extern int acpi_processor_set_throttling(struct acpi_processor *pr,
319 int state, bool force);
320/*
321 * Reevaluate whether the T-state is invalid after one cpu is
322 * onlined/offlined. In such case the flags.throttling will be updated.
323 */
324extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
325 unsigned long action);
326extern const struct file_operations acpi_processor_throttling_fops;
327extern void acpi_processor_throttling_init(void);
328/* in processor_idle.c */
329int acpi_processor_power_init(struct acpi_processor *pr,
330 struct acpi_device *device);
331int acpi_processor_cst_has_changed(struct acpi_processor *pr);
332int acpi_processor_power_exit(struct acpi_processor *pr,
333 struct acpi_device *device);
334int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
335int acpi_processor_resume(struct acpi_device * device);
336extern struct cpuidle_driver acpi_idle_driver;
337
338/* in processor_thermal.c */
339int acpi_processor_get_limit_info(struct acpi_processor *pr);
340extern const struct thermal_cooling_device_ops processor_cooling_ops;
341#ifdef CONFIG_CPU_FREQ
342void acpi_thermal_cpufreq_init(void);
343void acpi_thermal_cpufreq_exit(void);
344#else
345static inline void acpi_thermal_cpufreq_init(void)
346{
347 return;
348}
349static inline void acpi_thermal_cpufreq_exit(void)
350{
351 return;
352}
353#endif
354
355#endif
1#ifndef __ACPI_PROCESSOR_H
2#define __ACPI_PROCESSOR_H
3
4#include <linux/kernel.h>
5#include <linux/cpu.h>
6#include <linux/thermal.h>
7#include <asm/acpi.h>
8
9#define ACPI_PROCESSOR_CLASS "processor"
10#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
11#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
12
13#define ACPI_PROCESSOR_BUSY_METRIC 10
14
15#define ACPI_PROCESSOR_MAX_POWER 8
16#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
17#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
18
19#define ACPI_PROCESSOR_MAX_THROTTLING 16
20#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
21#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
22
23#define ACPI_PDC_REVISION_ID 0x1
24
25#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26#define ACPI_PSD_REV0_ENTRIES 5
27
28#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
29#define ACPI_TSD_REV0_ENTRIES 5
30/*
31 * Types of coordination defined in ACPI 3.0. Same macros can be used across
32 * P, C and T states
33 */
34#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
35#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
36#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
37
38#define ACPI_CSTATE_SYSTEMIO 0
39#define ACPI_CSTATE_FFH 1
40#define ACPI_CSTATE_HALT 2
41
42#define ACPI_CX_DESC_LEN 32
43
44/* Power Management */
45
46struct acpi_processor_cx;
47
48struct acpi_power_register {
49 u8 descriptor;
50 u16 length;
51 u8 space_id;
52 u8 bit_width;
53 u8 bit_offset;
54 u8 access_size;
55 u64 address;
56} __attribute__ ((packed));
57
58struct acpi_processor_cx {
59 u8 valid;
60 u8 type;
61 u32 address;
62 u8 entry_method;
63 u8 index;
64 u32 latency;
65 u8 bm_sts_skip;
66 char desc[ACPI_CX_DESC_LEN];
67};
68
69struct acpi_processor_power {
70 struct acpi_processor_cx *state;
71 unsigned long bm_check_timestamp;
72 u32 default_state;
73 int count;
74 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
75 int timer_broadcast_on_state;
76};
77
78/* Performance Management */
79
80struct acpi_psd_package {
81 u64 num_entries;
82 u64 revision;
83 u64 domain;
84 u64 coord_type;
85 u64 num_processors;
86} __attribute__ ((packed));
87
88struct acpi_pct_register {
89 u8 descriptor;
90 u16 length;
91 u8 space_id;
92 u8 bit_width;
93 u8 bit_offset;
94 u8 reserved;
95 u64 address;
96} __attribute__ ((packed));
97
98struct 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 */
105};
106
107struct acpi_processor_performance {
108 unsigned int state;
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;
117};
118
119/* Throttling Control */
120
121struct acpi_tsd_package {
122 u64 num_entries;
123 u64 revision;
124 u64 domain;
125 u64 coord_type;
126 u64 num_processors;
127} __attribute__ ((packed));
128
129struct acpi_ptc_register {
130 u8 descriptor;
131 u16 length;
132 u8 space_id;
133 u8 bit_width;
134 u8 bit_offset;
135 u8 reserved;
136 u64 address;
137} __attribute__ ((packed));
138
139struct 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 */
145};
146struct acpi_processor_tx {
147 u16 power;
148 u16 performance;
149};
150
151struct acpi_processor;
152struct acpi_processor_throttling {
153 unsigned int state;
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);
164
165 u32 address;
166 u8 duty_offset;
167 u8 duty_width;
168 u8 tsd_valid_flag;
169 unsigned int shared_type;
170 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
171};
172
173/* Limit Interface */
174
175struct acpi_processor_lx {
176 int px; /* performance state */
177 int tx; /* throttle level */
178};
179
180struct 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 */
184};
185
186struct acpi_processor_flags {
187 u8 power:1;
188 u8 performance:1;
189 u8 throttling:1;
190 u8 limit:1;
191 u8 bm_control:1;
192 u8 bm_check:1;
193 u8 has_cst:1;
194 u8 power_setup_done:1;
195 u8 bm_rld_set:1;
196 u8 need_hotplug_init:1;
197};
198
199struct acpi_processor {
200 acpi_handle handle;
201 u32 acpi_id;
202 u32 apic_id;
203 u32 id;
204 u32 pblk;
205 int performance_platform_limit;
206 int throttling_platform_limit;
207 /* 0 - states 0..n-th state available */
208
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. */
216};
217
218struct acpi_processor_errata {
219 u8 smp;
220 struct {
221 u8 throttle:1;
222 u8 fdma:1;
223 u8 reserved:6;
224 u32 bmisx;
225 } piix4;
226};
227
228extern int acpi_processor_preregister_performance(struct
229 acpi_processor_performance
230 __percpu *performance);
231
232extern int acpi_processor_register_performance(struct acpi_processor_performance
233 *performance, unsigned int cpu);
234extern void acpi_processor_unregister_performance(struct
235 acpi_processor_performance
236 *performance,
237 unsigned int cpu);
238
239/* note: this locks both the calling module and the processor module
240 if a _PPC object exists, rmmod is disallowed then */
241int acpi_processor_notify_smm(struct module *calling_module);
242
243/* parsing the _P* objects. */
244extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
245
246/* for communication between multiple parts of the processor kernel module */
247DECLARE_PER_CPU(struct acpi_processor *, processors);
248extern struct acpi_processor_errata errata;
249
250#ifdef ARCH_HAS_POWER_INIT
251void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
252 unsigned int cpu);
253int acpi_processor_ffh_cstate_probe(unsigned int cpu,
254 struct acpi_processor_cx *cx,
255 struct acpi_power_register *reg);
256void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
257#else
258static inline void acpi_processor_power_init_bm_check(struct
259 acpi_processor_flags
260 *flags, unsigned int cpu)
261{
262 flags->bm_check = 1;
263 return;
264}
265static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
266 struct acpi_processor_cx *cx,
267 struct acpi_power_register
268 *reg)
269{
270 return -1;
271}
272static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
273 *cstate)
274{
275 return;
276}
277#endif
278
279/* in processor_perflib.c */
280
281#ifdef CONFIG_CPU_FREQ
282void acpi_processor_ppc_init(void);
283void acpi_processor_ppc_exit(void);
284int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
285extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
286#else
287static inline void acpi_processor_ppc_init(void)
288{
289 return;
290}
291static inline void acpi_processor_ppc_exit(void)
292{
293 return;
294}
295static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
296 int event_flag)
297{
298 static unsigned int printout = 1;
299 if (printout) {
300 printk(KERN_WARNING
301 "Warning: Processor Platform Limit event detected, but not handled.\n");
302 printk(KERN_WARNING
303 "Consider compiling CPUfreq support into your kernel.\n");
304 printout = 0;
305 }
306 return 0;
307}
308static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
309{
310 return -ENODEV;
311}
312
313#endif /* CONFIG_CPU_FREQ */
314
315/* in processor_core.c */
316void acpi_processor_set_pdc(acpi_handle handle);
317int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
318int acpi_map_cpuid(int apic_id, u32 acpi_id);
319int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
320
321/* in processor_throttling.c */
322int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
323int acpi_processor_get_throttling_info(struct acpi_processor *pr);
324extern int acpi_processor_set_throttling(struct acpi_processor *pr,
325 int state, bool force);
326/*
327 * Reevaluate whether the T-state is invalid after one cpu is
328 * onlined/offlined. In such case the flags.throttling will be updated.
329 */
330extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
331 unsigned long action);
332extern const struct file_operations acpi_processor_throttling_fops;
333extern void acpi_processor_throttling_init(void);
334/* in processor_idle.c */
335int acpi_processor_power_init(struct acpi_processor *pr);
336int acpi_processor_power_exit(struct acpi_processor *pr);
337int acpi_processor_cst_has_changed(struct acpi_processor *pr);
338int acpi_processor_hotplug(struct acpi_processor *pr);
339extern struct cpuidle_driver acpi_idle_driver;
340
341#ifdef CONFIG_PM_SLEEP
342void acpi_processor_syscore_init(void);
343void acpi_processor_syscore_exit(void);
344#else
345static inline void acpi_processor_syscore_init(void) {}
346static inline void acpi_processor_syscore_exit(void) {}
347#endif
348
349/* in processor_thermal.c */
350int acpi_processor_get_limit_info(struct acpi_processor *pr);
351extern const struct thermal_cooling_device_ops processor_cooling_ops;
352#ifdef CONFIG_CPU_FREQ
353void acpi_thermal_cpufreq_init(void);
354void acpi_thermal_cpufreq_exit(void);
355#else
356static inline void acpi_thermal_cpufreq_init(void)
357{
358 return;
359}
360static inline void acpi_thermal_cpufreq_exit(void)
361{
362 return;
363}
364#endif
365
366#endif