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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;
Len Brown718be4a2010-07-22 16:54:27 -040051 u8 access_size;
Len Brown4be44fc2005-08-05 00:44:28 -040052 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053} __attribute__ ((packed));
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055struct acpi_processor_cx {
Len Brown4be44fc2005-08-05 00:44:28 -040056 u8 valid;
57 u8 type;
58 u32 address;
venkatesh.pallipadi@intel.combc71bec2008-01-31 17:35:04 -080059 u8 entry_method;
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -070060 u8 index;
Len Brown4be44fc2005-08-05 00:44:28 -040061 u32 latency;
62 u32 latency_ticks;
63 u32 power;
64 u32 usage;
Dominik Brodowskia3c65982006-06-24 19:37:00 -040065 u64 time;
Len Brown718be4a2010-07-22 16:54:27 -040066 u8 bm_sts_skip;
Venkatesh Pallipadi4fcb2fc2008-02-11 17:46:31 -080067 char desc[ACPI_CX_DESC_LEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -070068};
69
70struct acpi_processor_power {
Len Brown4f86d3a2007-10-03 18:58:00 -040071 struct cpuidle_device dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 struct acpi_processor_cx *state;
Len Brown4be44fc2005-08-05 00:44:28 -040073 unsigned long bm_check_timestamp;
74 u32 default_state;
Len Brown4be44fc2005-08-05 00:44:28 -040075 int count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
Thomas Gleixner169a0ab2007-02-16 01:27:55 -080077 int timer_broadcast_on_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078};
79
80/* Performance Management */
81
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050082struct acpi_psd_package {
Lin Ming439913f2010-01-28 10:53:19 +080083 u64 num_entries;
84 u64 revision;
85 u64 domain;
86 u64 coord_type;
87 u64 num_processors;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050088} __attribute__ ((packed));
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090struct acpi_pct_register {
Len Brown4be44fc2005-08-05 00:44:28 -040091 u8 descriptor;
92 u16 length;
93 u8 space_id;
94 u8 bit_width;
95 u8 bit_offset;
96 u8 reserved;
97 u64 address;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098} __attribute__ ((packed));
99
100struct acpi_processor_px {
Lin Ming439913f2010-01-28 10:53:19 +0800101 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109struct acpi_processor_performance {
Len Brown4be44fc2005-08-05 00:44:28 -0400110 unsigned int state;
111 unsigned int platform_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 struct acpi_pct_register control_register;
113 struct acpi_pct_register status_register;
Len Brown4be44fc2005-08-05 00:44:28 -0400114 unsigned int state_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 struct acpi_processor_px *states;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500116 struct acpi_psd_package domain_info;
Rusty Russell2fdf66b2008-12-31 18:08:47 -0800117 cpumask_var_t shared_cpu_map;
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500118 unsigned int shared_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121/* Throttling Control */
122
Luming Yu01854e62007-05-26 22:49:58 +0800123struct acpi_tsd_package {
Lin Ming439913f2010-01-28 10:53:19 +0800124 u64 num_entries;
125 u64 revision;
126 u64 domain;
127 u64 coord_type;
128 u64 num_processors;
Luming Yu01854e62007-05-26 22:49:58 +0800129} __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 {
Lin Ming439913f2010-01-28 10:53:19 +0800142 u64 freqpercentage; /* */
143 u64 power; /* milliWatts */
144 u64 transition_latency; /* microseconds */
145 u64 control; /* control value */
146 u64 status; /* success indicator */
Luming Yu01854e62007-05-26 22:49:58 +0800147};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148struct acpi_processor_tx {
Len Brown4be44fc2005-08-05 00:44:28 -0400149 u16 power;
150 u16 performance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151};
152
Luming Yu01854e62007-05-26 22:49:58 +0800153struct acpi_processor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154struct acpi_processor_throttling {
Luming Yu01854e62007-05-26 22:49:58 +0800155 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;
Rusty Russell2fdf66b2008-12-31 18:08:47 -0800162 cpumask_var_t shared_cpu_map;
Len Brownff55a9c2007-06-02 00:15:25 -0400163 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
164 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
Frans Pop2a908002009-08-26 14:29:29 -0700165 int state, bool force);
Luming Yu01854e62007-05-26 22:49:58 +0800166
Len Brown4be44fc2005-08-05 00:44:28 -0400167 u32 address;
168 u8 duty_offset;
169 u8 duty_width;
Zhao Yakui11805092008-01-28 13:53:42 +0800170 u8 tsd_valid_flag;
171 unsigned int shared_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
173};
174
175/* Limit Interface */
176
177struct acpi_processor_lx {
Joe Perchesaee07ba2008-02-03 17:07:16 +0200178 int px; /* performance state */
Len Brown4be44fc2005-08-05 00:44:28 -0400179 int tx; /* throttle level */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180};
181
182struct acpi_processor_limit {
Len Brown4be44fc2005-08-05 00:44:28 -0400183 struct acpi_processor_lx state; /* current limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 struct acpi_processor_lx thermal; /* thermal limit */
Len Brown4be44fc2005-08-05 00:44:28 -0400185 struct acpi_processor_lx user; /* user limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186};
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188struct acpi_processor_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400189 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;
Len Brown4f86d3a2007-10-03 18:58:00 -0400197 u8 bm_rld_set:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198};
199
200struct acpi_processor {
Len Brown4be44fc2005-08-05 00:44:28 -0400201 acpi_handle handle;
202 u32 acpi_id;
203 u32 id;
204 u32 pblk;
205 int performance_platform_limit;
Luming Yu01854e62007-05-26 22:49:58 +0800206 int throttling_platform_limit;
Len Brownff55a9c2007-06-02 00:15:25 -0400207 /* 0 - states 0..n-th state available */
Luming Yu01854e62007-05-26 22:49:58 +0800208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 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;
Zhang Ruid9460fd222008-01-17 15:51:23 +0800214 struct thermal_cooling_device *cdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215};
216
217struct acpi_processor_errata {
Len Brown4be44fc2005-08-05 00:44:28 -0400218 u8 smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 struct {
Len Brown4be44fc2005-08-05 00:44:28 -0400220 u8 throttle:1;
221 u8 fdma:1;
222 u8 reserved:6;
223 u32 bmisx;
224 } piix4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225};
226
Len Brownfd350942007-05-09 23:34:35 -0400227extern int acpi_processor_preregister_performance(struct
228 acpi_processor_performance
Tejun Heoa29d8b82010-02-02 14:39:15 +0900229 __percpu *performance);
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -0500230
Len Brown4be44fc2005-08-05 00:44:28 -0400231extern 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242/* for communication between multiple parts of the processor kernel module */
Mike Travis706546d2008-06-09 16:22:23 -0700243DECLARE_PER_CPU(struct acpi_processor *, processors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244extern struct acpi_processor_errata errata;
245
Venkatesh Pallipadi05131ec2005-10-23 16:31:00 -0400246#ifdef ARCH_HAS_POWER_INIT
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400247void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
Len Brown4be44fc2005-08-05 00:44:28 -0400248 unsigned int cpu);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700249int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400250 struct acpi_processor_cx *cx,
251 struct acpi_power_register *reg);
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700252void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400253#else
Len Brown4be44fc2005-08-05 00:44:28 -0400254static inline void acpi_processor_power_init_bm_check(struct
255 acpi_processor_flags
256 *flags, unsigned int cpu)
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400257{
258 flags->bm_check = 1;
259 return;
260}
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700261static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
Len Brownfd350942007-05-09 23:34:35 -0400262 struct acpi_processor_cx *cx,
263 struct acpi_power_register
264 *reg)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700265{
266 return -1;
267}
Len Brownfd350942007-05-09 23:34:35 -0400268static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
269 *cstate)
Venkatesh Pallipadi991528d2006-09-25 16:28:13 -0700270{
271 return;
272}
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400273#endif
274
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275/* in processor_perflib.c */
Venkatesh Pallipadi02df8b92005-04-15 15:07:10 -0400276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277#ifdef CONFIG_CPU_FREQ
278void acpi_processor_ppc_init(void);
279void acpi_processor_ppc_exit(void);
Zhao Yakuid81c45e12009-10-16 09:20:41 +0800280int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
Thomas Renningere2f74f32009-11-19 12:31:01 +0100281extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282#else
Len Brown4be44fc2005-08-05 00:44:28 -0400283static inline void acpi_processor_ppc_init(void)
284{
285 return;
286}
287static inline void acpi_processor_ppc_exit(void)
288{
289 return;
290}
Zhao Yakuid81c45e12009-10-16 09:20:41 +0800291static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
292 int event_flag)
Len Brown4be44fc2005-08-05 00:44:28 -0400293{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 static unsigned int printout = 1;
295 if (printout) {
Len Brown4be44fc2005-08-05 00:44:28 -0400296 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");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 printout = 0;
301 }
302 return 0;
303}
Thomas Renningere2f74f32009-11-19 12:31:01 +0100304static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
305{
306 return -ENODEV;
307}
308
Len Brown4be44fc2005-08-05 00:44:28 -0400309#endif /* CONFIG_CPU_FREQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Alex Chiang4d5d4cd2010-02-22 12:11:14 -0700311/* in processor_core.c */
Alex Chiang43bab252009-12-20 12:23:16 -0700312void acpi_processor_set_pdc(acpi_handle handle);
Alex Chiang2e9d5e42010-02-22 12:11:19 -0700313#ifdef CONFIG_SMP
314int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
315#else
316static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
317{
318 return -1;
319}
320#endif
Alex Chiang78f16992009-12-20 12:19:09 -0700321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322/* in processor_throttling.c */
Adrian Bunka66b34b2008-06-09 16:22:24 -0700323int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
Len Brown4be44fc2005-08-05 00:44:28 -0400324int acpi_processor_get_throttling_info(struct acpi_processor *pr);
Frans Pop2a908002009-08-26 14:29:29 -0700325extern int acpi_processor_set_throttling(struct acpi_processor *pr,
326 int state, bool force);
Zhao Yakui5a344a52011-01-10 16:35:45 +0800327/*
328 * Reevaluate whether the T-state is invalid after one cpu is
329 * onlined/offlined. In such case the flags.throttling will be updated.
330 */
331extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
332 unsigned long action);
Jan Engelhardt070d8eb2009-01-12 00:07:55 +0100333extern const struct file_operations acpi_processor_throttling_fops;
Zhao Yakui11805092008-01-28 13:53:42 +0800334extern void acpi_processor_throttling_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335/* in processor_idle.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400336int acpi_processor_power_init(struct acpi_processor *pr,
337 struct acpi_device *device);
338int acpi_processor_cst_has_changed(struct acpi_processor *pr);
339int acpi_processor_power_exit(struct acpi_processor *pr,
340 struct acpi_device *device);
Thomas Gleixnerb04e7bd2007-09-22 22:29:05 +0000341int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
342int acpi_processor_resume(struct acpi_device * device);
Len Brown4f86d3a2007-10-03 18:58:00 -0400343extern struct cpuidle_driver acpi_idle_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345/* in processor_thermal.c */
Len Brown4be44fc2005-08-05 00:44:28 -0400346int acpi_processor_get_limit_info(struct acpi_processor *pr);
Zhang Ruid9460fd222008-01-17 15:51:23 +0800347extern struct thermal_cooling_device_ops processor_cooling_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#ifdef CONFIG_CPU_FREQ
349void acpi_thermal_cpufreq_init(void);
350void acpi_thermal_cpufreq_exit(void);
351#else
Len Brown4be44fc2005-08-05 00:44:28 -0400352static inline void acpi_thermal_cpufreq_init(void)
353{
354 return;
355}
356static inline void acpi_thermal_cpufreq_exit(void)
357{
358 return;
359}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360#endif
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362#endif