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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ACPI_PROCESSOR_H
2#define __ACPI_PROCESSOR_H
3
4#include <linux/kernel.h>
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -05005#include <linux/cpu.h>
Len Brown4f86d3a2007-10-03 18:58:00 -04006#include <linux/cpuidle.h>
Zhang Ruid9460fd222008-01-17 15:51:23 +08007#include <linux/thermal.h>
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -04008#include <asm/acpi.h>
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -040020#define ACPI_PDC_REVISION_ID 0x1
21
Len Brownfd350942007-05-09 23:34:35 -040022#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050023#define ACPI_PSD_REV0_ENTRIES 5
24
Luming Yu01854e62007-05-26 22:49:58 +080025#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26#define ACPI_TSD_REV0_ENTRIES 5
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050027/*
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
Venkatesh Pallipadi4fcb2fc2008-02-11 17:46:31 -080035#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
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -070040
Linus Torvalds1da177e2005-04-16 15:20:36 -070041/* Power Management */
42
43struct acpi_processor_cx;
44
45struct acpi_power_register {
Len Brown4be44fc2005-08-05 00:44:28 -040046 u8 descriptor;
47 u16 length;
48 u8 space_id;
49 u8 bit_width;
50 u8 bit_offset;
51 u8 reserved;
52 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053} __attribute__ ((packed));
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055struct acpi_processor_cx_policy {
Len Brown4be44fc2005-08-05 00:44:28 -040056 u32 count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 struct acpi_processor_cx *state;
58 struct {
Len Brown4be44fc2005-08-05 00:44:28 -040059 u32 time;
60 u32 ticks;
61 u32 count;
62 u32 bm;
63 } threshold;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064};
65
66struct acpi_processor_cx {
Len Brown4be44fc2005-08-05 00:44:28 -040067 u8 valid;
68 u8 type;
69 u32 address;
venkatesh.pallipadi@intel.combc71bec2008-01-31 17:35:04 -080070 u8 entry_method;
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -070071 u8 index;
Len Brown4be44fc2005-08-05 00:44:28 -040072 u32 latency;
73 u32 latency_ticks;
74 u32 power;
75 u32 usage;
Dominik Brodowskia3c65982006-06-24 19:37:00 -040076 u64 time;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 struct acpi_processor_cx_policy promotion;
78 struct acpi_processor_cx_policy demotion;
Venkatesh Pallipadi4fcb2fc2008-02-11 17:46:31 -080079 char desc[ACPI_CX_DESC_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82struct acpi_processor_power {
Len Brown4f86d3a2007-10-03 18:58:00 -040083 struct cpuidle_device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 struct acpi_processor_cx *state;
Len Brown4be44fc2005-08-05 00:44:28 -040085 unsigned long bm_check_timestamp;
86 u32 default_state;
Len Brown4be44fc2005-08-05 00:44:28 -040087 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
Thomas Gleixner169a0ab2007-02-16 01:27:55 -080089 int timer_broadcast_on_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090};
91
92/* Performance Management */
93
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050094struct acpi_psd_package {
95 acpi_integer num_entries;
96 acpi_integer revision;
97 acpi_integer domain;
98 acpi_integer coord_type;
99 acpi_integer num_processors;
100} __attribute__ ((packed));
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102struct acpi_pct_register {
Len Brown4be44fc2005-08-05 00:44:28 -0400103 u8 descriptor;
104 u16 length;
105 u8 space_id;
106 u8 bit_width;
107 u8 bit_offset;
108 u8 reserved;
109 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110} __attribute__ ((packed));
111
112struct acpi_processor_px {
Len Brown4be44fc2005-08-05 00:44:28 -0400113 acpi_integer core_frequency; /* megahertz */
114 acpi_integer power; /* milliWatts */
115 acpi_integer transition_latency; /* microseconds */
116 acpi_integer bus_master_latency; /* microseconds */
117 acpi_integer control; /* control value */
118 acpi_integer status; /* success indicator */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121struct acpi_processor_performance {
Len Brown4be44fc2005-08-05 00:44:28 -0400122 unsigned int state;
123 unsigned int platform_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 struct acpi_pct_register control_register;
125 struct acpi_pct_register status_register;
Len Brown4be44fc2005-08-05 00:44:28 -0400126 unsigned int state_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 struct acpi_processor_px *states;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500128 struct acpi_psd_package domain_info;
Rusty Russell2fdf66b2008-12-31 18:08:47 -0800129 cpumask_var_t shared_cpu_map;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500130 unsigned int shared_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131};
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133/* Throttling Control */
134
Luming Yu01854e62007-05-26 22:49:58 +0800135struct acpi_tsd_package {
136 acpi_integer num_entries;
137 acpi_integer revision;
138 acpi_integer domain;
139 acpi_integer coord_type;
140 acpi_integer num_processors;
141} __attribute__ ((packed));
142
143struct acpi_ptc_register {
144 u8 descriptor;
145 u16 length;
146 u8 space_id;
147 u8 bit_width;
148 u8 bit_offset;
149 u8 reserved;
150 u64 address;
151} __attribute__ ((packed));
152
153struct acpi_processor_tx_tss {
154 acpi_integer freqpercentage; /* */
155 acpi_integer power; /* milliWatts */
156 acpi_integer transition_latency; /* microseconds */
157 acpi_integer control; /* control value */
158 acpi_integer status; /* success indicator */
159};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160struct acpi_processor_tx {
Len Brown4be44fc2005-08-05 00:44:28 -0400161 u16 power;
162 u16 performance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163};
164
Luming Yu01854e62007-05-26 22:49:58 +0800165struct acpi_processor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166struct acpi_processor_throttling {
Luming Yu01854e62007-05-26 22:49:58 +0800167 unsigned int state;
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;
Rusty Russell2fdf66b2008-12-31 18:08:47 -0800174 cpumask_var_t shared_cpu_map;
Len Brownff55a9c2007-06-02 00:15:25 -0400175 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
176 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
177 int state);
Luming Yu01854e62007-05-26 22:49:58 +0800178
Len Brown4be44fc2005-08-05 00:44:28 -0400179 u32 address;
180 u8 duty_offset;
181 u8 duty_width;
Zhao Yakui11805092008-01-28 13:53:42 +0800182 u8 tsd_valid_flag;
183 unsigned int shared_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
185};
186
187/* Limit Interface */
188
189struct acpi_processor_lx {
Joe Perchesaee07ba2008-02-03 17:07:16 +0200190 int px; /* performance state */
Len Brown4be44fc2005-08-05 00:44:28 -0400191 int tx; /* throttle level */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192};
193
194struct acpi_processor_limit {
Len Brown4be44fc2005-08-05 00:44:28 -0400195 struct acpi_processor_lx state; /* current limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 struct acpi_processor_lx thermal; /* thermal limit */
Len Brown4be44fc2005-08-05 00:44:28 -0400197 struct acpi_processor_lx user; /* user limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198};
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200struct acpi_processor_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400201 u8 power:1;
202 u8 performance:1;
203 u8 throttling:1;
204 u8 limit:1;
205 u8 bm_control:1;
206 u8 bm_check:1;
207 u8 has_cst:1;
208 u8 power_setup_done:1;
Len Brown4f86d3a2007-10-03 18:58:00 -0400209 u8 bm_rld_set:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210};
211
212struct acpi_processor {
Len Brown4be44fc2005-08-05 00:44:28 -0400213 acpi_handle handle;
214 u32 acpi_id;
215 u32 id;
216 u32 pblk;
217 int performance_platform_limit;
Luming Yu01854e62007-05-26 22:49:58 +0800218 int throttling_platform_limit;
Len Brownff55a9c2007-06-02 00:15:25 -0400219 /* 0 - states 0..n-th state available */
Luming Yu01854e62007-05-26 22:49:58 +0800220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 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;
Zhang Ruid9460fd222008-01-17 15:51:23 +0800226 struct thermal_cooling_device *cdev;
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400227 /* the _PDC objects for this processor, if any */
228 struct acpi_object_list *pdc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229};
230
231struct acpi_processor_errata {
Len Brown4be44fc2005-08-05 00:44:28 -0400232 u8 smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 struct {
Len Brown4be44fc2005-08-05 00:44:28 -0400234 u8 throttle:1;
235 u8 fdma:1;
236 u8 reserved:6;
237 u32 bmisx;
238 } piix4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239};
240
Len Brownfd350942007-05-09 23:34:35 -0400241extern int acpi_processor_preregister_performance(struct
242 acpi_processor_performance
Fenghua Yu50109292007-08-07 18:40:30 -0400243 *performance);
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500244
Len Brown4be44fc2005-08-05 00:44:28 -0400245extern int acpi_processor_register_performance(struct acpi_processor_performance
246 *performance, unsigned int cpu);
247extern void acpi_processor_unregister_performance(struct
248 acpi_processor_performance
249 *performance,
250 unsigned int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252/* note: this locks both the calling module and the processor module
253 if a _PPC object exists, rmmod is disallowed then */
254int acpi_processor_notify_smm(struct module *calling_module);
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256/* for communication between multiple parts of the processor kernel module */
Mike Travis706546d2008-06-09 16:22:23 -0700257DECLARE_PER_CPU(struct acpi_processor *, processors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258extern struct acpi_processor_errata errata;
259
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400260void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400261
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400262#ifdef ARCH_HAS_POWER_INIT
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400263void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
Len Brown4be44fc2005-08-05 00:44:28 -0400264 unsigned int cpu);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700265int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400266 struct acpi_processor_cx *cx,
267 struct acpi_power_register *reg);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700268void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400269#else
Len Brown4be44fc2005-08-05 00:44:28 -0400270static inline void acpi_processor_power_init_bm_check(struct
271 acpi_processor_flags
272 *flags, unsigned int cpu)
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400273{
274 flags->bm_check = 1;
275 return;
276}
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700277static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400278 struct acpi_processor_cx *cx,
279 struct acpi_power_register
280 *reg)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700281{
282 return -1;
283}
Len Brownfd350942007-05-09 23:34:35 -0400284static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
285 *cstate)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700286{
287 return;
288}
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400289#endif
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291/* in processor_perflib.c */
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293#ifdef CONFIG_CPU_FREQ
294void acpi_processor_ppc_init(void);
295void acpi_processor_ppc_exit(void);
296int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
297#else
Len Brown4be44fc2005-08-05 00:44:28 -0400298static inline void acpi_processor_ppc_init(void)
299{
300 return;
301}
302static inline void acpi_processor_ppc_exit(void)
303{
304 return;
305}
306static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
307{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 static unsigned int printout = 1;
309 if (printout) {
Len Brown4be44fc2005-08-05 00:44:28 -0400310 printk(KERN_WARNING
311 "Warning: Processor Platform Limit event detected, but not handled.\n");
312 printk(KERN_WARNING
313 "Consider compiling CPUfreq support into your kernel.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 printout = 0;
315 }
316 return 0;
317}
Len Brown4be44fc2005-08-05 00:44:28 -0400318#endif /* CONFIG_CPU_FREQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320/* in processor_throttling.c */
Adrian Bunka66b34b2008-06-09 16:22:24 -0700321int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
Len Brown4be44fc2005-08-05 00:44:28 -0400322int acpi_processor_get_throttling_info(struct acpi_processor *pr);
Luming Yu01854e62007-05-26 22:49:58 +0800323extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100324extern const struct file_operations acpi_processor_throttling_fops;
Zhao Yakui11805092008-01-28 13:53:42 +0800325extern void acpi_processor_throttling_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326/* in processor_idle.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400327int acpi_processor_power_init(struct acpi_processor *pr,
328 struct acpi_device *device);
329int acpi_processor_cst_has_changed(struct acpi_processor *pr);
330int acpi_processor_power_exit(struct acpi_processor *pr,
331 struct acpi_device *device);
Thomas Gleixnerb04e7bd2007-09-22 22:29:05 +0000332int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
333int acpi_processor_resume(struct acpi_device * device);
Len Brown4f86d3a2007-10-03 18:58:00 -0400334extern struct cpuidle_driver acpi_idle_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336/* in processor_thermal.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400337int acpi_processor_get_limit_info(struct acpi_processor *pr);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100338extern const struct file_operations acpi_processor_limit_fops;
Zhang Ruid9460fd222008-01-17 15:51:23 +0800339extern struct thermal_cooling_device_ops processor_cooling_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340#ifdef CONFIG_CPU_FREQ
341void acpi_thermal_cpufreq_init(void);
342void acpi_thermal_cpufreq_exit(void);
343#else
Len Brown4be44fc2005-08-05 00:44:28 -0400344static inline void acpi_thermal_cpufreq_init(void)
345{
346 return;
347}
348static inline void acpi_thermal_cpufreq_exit(void)
349{
350 return;
351}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352#endif
353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354#endif