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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -04007#include <asm/acpi.h>
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#define ACPI_PROCESSOR_BUSY_METRIC 10
10
11#define ACPI_PROCESSOR_MAX_POWER 8
12#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
13#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
14
15#define ACPI_PROCESSOR_MAX_THROTTLING 16
16#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
17#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
18
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -040019#define ACPI_PDC_REVISION_ID 0x1
20
Len Brownfd350942007-05-09 23:34:35 -040021#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050022#define ACPI_PSD_REV0_ENTRIES 5
23
Luming Yu01854e62007-05-26 22:49:58 +080024#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
25#define ACPI_TSD_REV0_ENTRIES 5
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050026/*
27 * Types of coordination defined in ACPI 3.0. Same macros can be used across
28 * P, C and T states
29 */
30#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
31#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
32#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
33
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -070034#define ACPI_CSTATE_SYSTEMIO (0)
35#define ACPI_CSTATE_FFH (1)
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037/* Power Management */
38
39struct acpi_processor_cx;
40
41struct acpi_power_register {
Len Brown4be44fc2005-08-05 00:44:28 -040042 u8 descriptor;
43 u16 length;
44 u8 space_id;
45 u8 bit_width;
46 u8 bit_offset;
47 u8 reserved;
48 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049} __attribute__ ((packed));
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051struct acpi_processor_cx_policy {
Len Brown4be44fc2005-08-05 00:44:28 -040052 u32 count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 struct acpi_processor_cx *state;
54 struct {
Len Brown4be44fc2005-08-05 00:44:28 -040055 u32 time;
56 u32 ticks;
57 u32 count;
58 u32 bm;
59 } threshold;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060};
61
62struct acpi_processor_cx {
Len Brown4be44fc2005-08-05 00:44:28 -040063 u8 valid;
64 u8 type;
65 u32 address;
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -070066 u8 space_id;
67 u8 index;
Len Brown4be44fc2005-08-05 00:44:28 -040068 u32 latency;
69 u32 latency_ticks;
70 u32 power;
71 u32 usage;
Dominik Brodowskia3c65982006-06-24 19:37:00 -040072 u64 time;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 struct acpi_processor_cx_policy promotion;
74 struct acpi_processor_cx_policy demotion;
75};
76
77struct acpi_processor_power {
78 struct acpi_processor_cx *state;
Len Brown4be44fc2005-08-05 00:44:28 -040079 unsigned long bm_check_timestamp;
80 u32 default_state;
81 u32 bm_activity;
82 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
Thomas Gleixner169a0ab2007-02-16 01:27:55 -080084 int timer_broadcast_on_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085};
86
87/* Performance Management */
88
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050089struct acpi_psd_package {
90 acpi_integer num_entries;
91 acpi_integer revision;
92 acpi_integer domain;
93 acpi_integer coord_type;
94 acpi_integer num_processors;
95} __attribute__ ((packed));
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097struct acpi_pct_register {
Len Brown4be44fc2005-08-05 00:44:28 -040098 u8 descriptor;
99 u16 length;
100 u8 space_id;
101 u8 bit_width;
102 u8 bit_offset;
103 u8 reserved;
104 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105} __attribute__ ((packed));
106
107struct acpi_processor_px {
Len Brown4be44fc2005-08-05 00:44:28 -0400108 acpi_integer core_frequency; /* megahertz */
109 acpi_integer power; /* milliWatts */
110 acpi_integer transition_latency; /* microseconds */
111 acpi_integer bus_master_latency; /* microseconds */
112 acpi_integer control; /* control value */
113 acpi_integer status; /* success indicator */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114};
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116struct acpi_processor_performance {
Len Brown4be44fc2005-08-05 00:44:28 -0400117 unsigned int state;
118 unsigned int platform_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 struct acpi_pct_register control_register;
120 struct acpi_pct_register status_register;
Len Brown4be44fc2005-08-05 00:44:28 -0400121 unsigned int state_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 struct acpi_processor_px *states;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500123 struct acpi_psd_package domain_info;
124 cpumask_t shared_cpu_map;
125 unsigned int shared_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126};
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128/* Throttling Control */
129
Luming Yu01854e62007-05-26 22:49:58 +0800130struct acpi_tsd_package {
131 acpi_integer num_entries;
132 acpi_integer revision;
133 acpi_integer domain;
134 acpi_integer coord_type;
135 acpi_integer num_processors;
136} __attribute__ ((packed));
137
138struct acpi_ptc_register {
139 u8 descriptor;
140 u16 length;
141 u8 space_id;
142 u8 bit_width;
143 u8 bit_offset;
144 u8 reserved;
145 u64 address;
146} __attribute__ ((packed));
147
148struct acpi_processor_tx_tss {
149 acpi_integer freqpercentage; /* */
150 acpi_integer power; /* milliWatts */
151 acpi_integer transition_latency; /* microseconds */
152 acpi_integer control; /* control value */
153 acpi_integer status; /* success indicator */
154};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155struct acpi_processor_tx {
Len Brown4be44fc2005-08-05 00:44:28 -0400156 u16 power;
157 u16 performance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158};
159
Luming Yu01854e62007-05-26 22:49:58 +0800160struct acpi_processor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161struct acpi_processor_throttling {
Luming Yu01854e62007-05-26 22:49:58 +0800162 unsigned int state;
163 unsigned int platform_limit;
164 struct acpi_pct_register control_register;
165 struct acpi_pct_register status_register;
166 unsigned int state_count;
167 struct acpi_processor_tx_tss *states_tss;
168 struct acpi_tsd_package domain_info;
169 cpumask_t shared_cpu_map;
Len Brownff55a9c2007-06-02 00:15:25 -0400170 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
171 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
172 int state);
Luming Yu01854e62007-05-26 22:49:58 +0800173
Len Brown4be44fc2005-08-05 00:44:28 -0400174 u32 address;
175 u8 duty_offset;
176 u8 duty_width;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
178};
179
180/* Limit Interface */
181
182struct acpi_processor_lx {
Len Brown4be44fc2005-08-05 00:44:28 -0400183 int px; /* performace state */
184 int tx; /* throttle level */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185};
186
187struct acpi_processor_limit {
Len Brown4be44fc2005-08-05 00:44:28 -0400188 struct acpi_processor_lx state; /* current limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 struct acpi_processor_lx thermal; /* thermal limit */
Len Brown4be44fc2005-08-05 00:44:28 -0400190 struct acpi_processor_lx user; /* user limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191};
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193struct acpi_processor_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400194 u8 power:1;
195 u8 performance:1;
196 u8 throttling:1;
197 u8 limit:1;
198 u8 bm_control:1;
199 u8 bm_check:1;
200 u8 has_cst:1;
201 u8 power_setup_done:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202};
203
204struct acpi_processor {
Len Brown4be44fc2005-08-05 00:44:28 -0400205 acpi_handle handle;
206 u32 acpi_id;
207 u32 id;
208 u32 pblk;
209 int performance_platform_limit;
Luming Yu01854e62007-05-26 22:49:58 +0800210 int throttling_platform_limit;
Len Brownff55a9c2007-06-02 00:15:25 -0400211 /* 0 - states 0..n-th state available */
Luming Yu01854e62007-05-26 22:49:58 +0800212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct acpi_processor_flags flags;
214 struct acpi_processor_power power;
215 struct acpi_processor_performance *performance;
216 struct acpi_processor_throttling throttling;
217 struct acpi_processor_limit limit;
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400218
219 /* the _PDC objects for this processor, if any */
220 struct acpi_object_list *pdc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221};
222
223struct acpi_processor_errata {
Len Brown4be44fc2005-08-05 00:44:28 -0400224 u8 smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 struct {
Len Brown4be44fc2005-08-05 00:44:28 -0400226 u8 throttle:1;
227 u8 fdma:1;
228 u8 reserved:6;
229 u32 bmisx;
230 } piix4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231};
232
Len Brownfd350942007-05-09 23:34:35 -0400233extern int acpi_processor_preregister_performance(struct
234 acpi_processor_performance
Fenghua Yu50109292007-08-07 18:40:30 -0400235 *performance);
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500236
Len Brown4be44fc2005-08-05 00:44:28 -0400237extern int acpi_processor_register_performance(struct acpi_processor_performance
238 *performance, unsigned int cpu);
239extern void acpi_processor_unregister_performance(struct
240 acpi_processor_performance
241 *performance,
242 unsigned int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
244/* note: this locks both the calling module and the processor module
245 if a _PPC object exists, rmmod is disallowed then */
246int acpi_processor_notify_smm(struct module *calling_module);
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248/* for communication between multiple parts of the processor kernel module */
Len Brown4be44fc2005-08-05 00:44:28 -0400249extern struct acpi_processor *processors[NR_CPUS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250extern struct acpi_processor_errata errata;
251
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400252void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400253
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400254#ifdef ARCH_HAS_POWER_INIT
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400255void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
Len Brown4be44fc2005-08-05 00:44:28 -0400256 unsigned int cpu);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700257int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400258 struct acpi_processor_cx *cx,
259 struct acpi_power_register *reg);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700260void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400261#else
Len Brown4be44fc2005-08-05 00:44:28 -0400262static inline void acpi_processor_power_init_bm_check(struct
263 acpi_processor_flags
264 *flags, unsigned int cpu)
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400265{
266 flags->bm_check = 1;
267 return;
268}
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700269static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400270 struct acpi_processor_cx *cx,
271 struct acpi_power_register
272 *reg)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700273{
274 return -1;
275}
Len Brownfd350942007-05-09 23:34:35 -0400276static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
277 *cstate)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700278{
279 return;
280}
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400281#endif
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283/* in processor_perflib.c */
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285#ifdef CONFIG_CPU_FREQ
286void acpi_processor_ppc_init(void);
287void acpi_processor_ppc_exit(void);
288int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
289#else
Len Brown4be44fc2005-08-05 00:44:28 -0400290static inline void acpi_processor_ppc_init(void)
291{
292 return;
293}
294static inline void acpi_processor_ppc_exit(void)
295{
296 return;
297}
298static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
299{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 static unsigned int printout = 1;
301 if (printout) {
Len Brown4be44fc2005-08-05 00:44:28 -0400302 printk(KERN_WARNING
303 "Warning: Processor Platform Limit event detected, but not handled.\n");
304 printk(KERN_WARNING
305 "Consider compiling CPUfreq support into your kernel.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 printout = 0;
307 }
308 return 0;
309}
Len Brown4be44fc2005-08-05 00:44:28 -0400310#endif /* CONFIG_CPU_FREQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312/* in processor_throttling.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400313int acpi_processor_get_throttling_info(struct acpi_processor *pr);
Luming Yu01854e62007-05-26 22:49:58 +0800314extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315extern struct file_operations acpi_processor_throttling_fops;
316
317/* in processor_idle.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400318int acpi_processor_power_init(struct acpi_processor *pr,
319 struct acpi_device *device);
320int acpi_processor_cst_has_changed(struct acpi_processor *pr);
321int acpi_processor_power_exit(struct acpi_processor *pr,
322 struct acpi_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324/* in processor_thermal.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400325int acpi_processor_get_limit_info(struct acpi_processor *pr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326extern struct file_operations acpi_processor_limit_fops;
327
328#ifdef CONFIG_CPU_FREQ
329void acpi_thermal_cpufreq_init(void);
330void acpi_thermal_cpufreq_exit(void);
331#else
Len Brown4be44fc2005-08-05 00:44:28 -0400332static inline void acpi_thermal_cpufreq_init(void)
333{
334 return;
335}
336static inline void acpi_thermal_cpufreq_exit(void)
337{
338 return;
339}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340#endif
341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342#endif