Linux kernel mirror (for testing)
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linux
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/* Power Management */
40
41struct acpi_processor_cx;
42
43struct acpi_power_register {
44 u8 descriptor;
45 u16 length;
46 u8 space_id;
47 u8 bit_width;
48 u8 bit_offset;
49 u8 reserved;
50 u64 address;
51} __attribute__ ((packed));
52
53struct acpi_processor_cx_policy {
54 u32 count;
55 struct acpi_processor_cx *state;
56 struct {
57 u32 time;
58 u32 ticks;
59 u32 count;
60 u32 bm;
61 } threshold;
62};
63
64struct acpi_processor_cx {
65 u8 valid;
66 u8 type;
67 u32 address;
68 u8 entry_method;
69 u8 index;
70 u32 latency;
71 u32 latency_ticks;
72 u32 power;
73 u32 usage;
74 u64 time;
75 struct acpi_processor_cx_policy promotion;
76 struct acpi_processor_cx_policy demotion;
77};
78
79struct acpi_processor_power {
80 struct cpuidle_device dev;
81 struct acpi_processor_cx *state;
82 unsigned long bm_check_timestamp;
83 u32 default_state;
84 u32 bm_activity;
85 int count;
86 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
87 int timer_broadcast_on_state;
88};
89
90/* Performance Management */
91
92struct acpi_psd_package {
93 acpi_integer num_entries;
94 acpi_integer revision;
95 acpi_integer domain;
96 acpi_integer coord_type;
97 acpi_integer num_processors;
98} __attribute__ ((packed));
99
100struct acpi_pct_register {
101 u8 descriptor;
102 u16 length;
103 u8 space_id;
104 u8 bit_width;
105 u8 bit_offset;
106 u8 reserved;
107 u64 address;
108} __attribute__ ((packed));
109
110struct acpi_processor_px {
111 acpi_integer core_frequency; /* megahertz */
112 acpi_integer power; /* milliWatts */
113 acpi_integer transition_latency; /* microseconds */
114 acpi_integer bus_master_latency; /* microseconds */
115 acpi_integer control; /* control value */
116 acpi_integer status; /* success indicator */
117};
118
119struct acpi_processor_performance {
120 unsigned int state;
121 unsigned int platform_limit;
122 struct acpi_pct_register control_register;
123 struct acpi_pct_register status_register;
124 unsigned int state_count;
125 struct acpi_processor_px *states;
126 struct acpi_psd_package domain_info;
127 cpumask_t shared_cpu_map;
128 unsigned int shared_type;
129};
130
131/* Throttling Control */
132
133struct acpi_tsd_package {
134 acpi_integer num_entries;
135 acpi_integer revision;
136 acpi_integer domain;
137 acpi_integer coord_type;
138 acpi_integer num_processors;
139} __attribute__ ((packed));
140
141struct acpi_ptc_register {
142 u8 descriptor;
143 u16 length;
144 u8 space_id;
145 u8 bit_width;
146 u8 bit_offset;
147 u8 reserved;
148 u64 address;
149} __attribute__ ((packed));
150
151struct acpi_processor_tx_tss {
152 acpi_integer freqpercentage; /* */
153 acpi_integer power; /* milliWatts */
154 acpi_integer transition_latency; /* microseconds */
155 acpi_integer control; /* control value */
156 acpi_integer status; /* success indicator */
157};
158struct acpi_processor_tx {
159 u16 power;
160 u16 performance;
161};
162
163struct acpi_processor;
164struct acpi_processor_throttling {
165 unsigned int state;
166 unsigned int platform_limit;
167 struct acpi_pct_register control_register;
168 struct acpi_pct_register status_register;
169 unsigned int state_count;
170 struct acpi_processor_tx_tss *states_tss;
171 struct acpi_tsd_package domain_info;
172 cpumask_t shared_cpu_map;
173 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
174 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
175 int state);
176
177 u32 address;
178 u8 duty_offset;
179 u8 duty_width;
180 u8 tsd_valid_flag;
181 unsigned int shared_type;
182 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
183};
184
185/* Limit Interface */
186
187struct acpi_processor_lx {
188 int px; /* performance state */
189 int tx; /* throttle level */
190};
191
192struct acpi_processor_limit {
193 struct acpi_processor_lx state; /* current limit */
194 struct acpi_processor_lx thermal; /* thermal limit */
195 struct acpi_processor_lx user; /* user limit */
196};
197
198struct acpi_processor_flags {
199 u8 power:1;
200 u8 performance:1;
201 u8 throttling:1;
202 u8 limit:1;
203 u8 bm_control:1;
204 u8 bm_check:1;
205 u8 has_cst:1;
206 u8 power_setup_done:1;
207 u8 bm_rld_set:1;
208};
209
210struct acpi_processor {
211 acpi_handle handle;
212 u32 acpi_id;
213 u32 id;
214 u32 pblk;
215 int performance_platform_limit;
216 int throttling_platform_limit;
217 /* 0 - states 0..n-th state available */
218
219 struct acpi_processor_flags flags;
220 struct acpi_processor_power power;
221 struct acpi_processor_performance *performance;
222 struct acpi_processor_throttling throttling;
223 struct acpi_processor_limit limit;
224 struct thermal_cooling_device *cdev;
225 /* the _PDC objects for this processor, if any */
226 struct acpi_object_list *pdc;
227};
228
229struct acpi_processor_errata {
230 u8 smp;
231 struct {
232 u8 throttle:1;
233 u8 fdma:1;
234 u8 reserved:6;
235 u32 bmisx;
236 } piix4;
237};
238
239extern int acpi_processor_preregister_performance(struct
240 acpi_processor_performance
241 *performance);
242
243extern int acpi_processor_register_performance(struct acpi_processor_performance
244 *performance, unsigned int cpu);
245extern void acpi_processor_unregister_performance(struct
246 acpi_processor_performance
247 *performance,
248 unsigned int cpu);
249
250/* note: this locks both the calling module and the processor module
251 if a _PPC object exists, rmmod is disallowed then */
252int acpi_processor_notify_smm(struct module *calling_module);
253
254/* for communication between multiple parts of the processor kernel module */
255extern struct acpi_processor *processors[NR_CPUS];
256extern struct acpi_processor_errata errata;
257
258void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
259
260#ifdef ARCH_HAS_POWER_INIT
261void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
262 unsigned int cpu);
263int acpi_processor_ffh_cstate_probe(unsigned int cpu,
264 struct acpi_processor_cx *cx,
265 struct acpi_power_register *reg);
266void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
267#else
268static inline void acpi_processor_power_init_bm_check(struct
269 acpi_processor_flags
270 *flags, unsigned int cpu)
271{
272 flags->bm_check = 1;
273 return;
274}
275static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
276 struct acpi_processor_cx *cx,
277 struct acpi_power_register
278 *reg)
279{
280 return -1;
281}
282static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
283 *cstate)
284{
285 return;
286}
287#endif
288
289/* in processor_perflib.c */
290
291#ifdef CONFIG_CPU_FREQ
292void acpi_processor_ppc_init(void);
293void acpi_processor_ppc_exit(void);
294int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
295#else
296static inline void acpi_processor_ppc_init(void)
297{
298 return;
299}
300static inline void acpi_processor_ppc_exit(void)
301{
302 return;
303}
304static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
305{
306 static unsigned int printout = 1;
307 if (printout) {
308 printk(KERN_WARNING
309 "Warning: Processor Platform Limit event detected, but not handled.\n");
310 printk(KERN_WARNING
311 "Consider compiling CPUfreq support into your kernel.\n");
312 printout = 0;
313 }
314 return 0;
315}
316#endif /* CONFIG_CPU_FREQ */
317
318/* in processor_throttling.c */
319int acpi_processor_get_throttling_info(struct acpi_processor *pr);
320extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
321extern struct file_operations acpi_processor_throttling_fops;
322extern void acpi_processor_throttling_init(void);
323/* in processor_idle.c */
324int acpi_processor_power_init(struct acpi_processor *pr,
325 struct acpi_device *device);
326int acpi_processor_cst_has_changed(struct acpi_processor *pr);
327int acpi_processor_power_exit(struct acpi_processor *pr,
328 struct acpi_device *device);
329int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
330int acpi_processor_resume(struct acpi_device * device);
331extern struct cpuidle_driver acpi_idle_driver;
332
333/* in processor_thermal.c */
334int acpi_processor_get_limit_info(struct acpi_processor *pr);
335extern struct file_operations acpi_processor_limit_fops;
336extern struct thermal_cooling_device_ops processor_cooling_ops;
337#ifdef CONFIG_CPU_FREQ
338void acpi_thermal_cpufreq_init(void);
339void acpi_thermal_cpufreq_exit(void);
340#else
341static inline void acpi_thermal_cpufreq_init(void)
342{
343 return;
344}
345static inline void acpi_thermal_cpufreq_exit(void)
346{
347 return;
348}
349#endif
350
351#endif