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
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
38/* Power Management */
39
40struct acpi_processor_cx;
41
42struct acpi_power_register {
43 u8 descriptor;
44 u16 length;
45 u8 space_id;
46 u8 bit_width;
47 u8 bit_offset;
48 u8 reserved;
49 u64 address;
50} __attribute__ ((packed));
51
52struct acpi_processor_cx_policy {
53 u32 count;
54 struct acpi_processor_cx *state;
55 struct {
56 u32 time;
57 u32 ticks;
58 u32 count;
59 u32 bm;
60 } threshold;
61};
62
63struct acpi_processor_cx {
64 u8 valid;
65 u8 type;
66 u32 address;
67 u8 space_id;
68 u8 index;
69 u32 latency;
70 u32 latency_ticks;
71 u32 power;
72 u32 usage;
73 u64 time;
74 struct acpi_processor_cx_policy promotion;
75 struct acpi_processor_cx_policy demotion;
76};
77
78struct acpi_processor_power {
79 struct cpuidle_device dev;
80 struct acpi_processor_cx *state;
81 struct acpi_processor_cx *bm_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 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
181};
182
183/* Limit Interface */
184
185struct acpi_processor_lx {
186 int px; /* performace state */
187 int tx; /* throttle level */
188};
189
190struct acpi_processor_limit {
191 struct acpi_processor_lx state; /* current limit */
192 struct acpi_processor_lx thermal; /* thermal limit */
193 struct acpi_processor_lx user; /* user limit */
194};
195
196struct acpi_processor_flags {
197 u8 power:1;
198 u8 performance:1;
199 u8 throttling:1;
200 u8 limit:1;
201 u8 bm_control:1;
202 u8 bm_check:1;
203 u8 has_cst:1;
204 u8 power_setup_done:1;
205 u8 bm_rld_set:1;
206};
207
208struct acpi_processor {
209 acpi_handle handle;
210 u32 acpi_id;
211 u32 id;
212 u32 pblk;
213 int performance_platform_limit;
214 int throttling_platform_limit;
215 /* 0 - states 0..n-th state available */
216
217 struct acpi_processor_flags flags;
218 struct acpi_processor_power power;
219 struct acpi_processor_performance *performance;
220 struct acpi_processor_throttling throttling;
221 struct acpi_processor_limit limit;
222
223 /* the _PDC objects for this processor, if any */
224 struct acpi_object_list *pdc;
225};
226
227struct acpi_processor_errata {
228 u8 smp;
229 struct {
230 u8 throttle:1;
231 u8 fdma:1;
232 u8 reserved:6;
233 u32 bmisx;
234 } piix4;
235};
236
237extern int acpi_processor_preregister_performance(struct
238 acpi_processor_performance
239 *performance);
240
241extern int acpi_processor_register_performance(struct acpi_processor_performance
242 *performance, unsigned int cpu);
243extern void acpi_processor_unregister_performance(struct
244 acpi_processor_performance
245 *performance,
246 unsigned int cpu);
247
248/* note: this locks both the calling module and the processor module
249 if a _PPC object exists, rmmod is disallowed then */
250int acpi_processor_notify_smm(struct module *calling_module);
251
252/* for communication between multiple parts of the processor kernel module */
253extern struct acpi_processor *processors[NR_CPUS];
254extern struct acpi_processor_errata errata;
255
256void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
257
258#ifdef ARCH_HAS_POWER_INIT
259void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
260 unsigned int cpu);
261int acpi_processor_ffh_cstate_probe(unsigned int cpu,
262 struct acpi_processor_cx *cx,
263 struct acpi_power_register *reg);
264void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
265#else
266static inline void acpi_processor_power_init_bm_check(struct
267 acpi_processor_flags
268 *flags, unsigned int cpu)
269{
270 flags->bm_check = 1;
271 return;
272}
273static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
274 struct acpi_processor_cx *cx,
275 struct acpi_power_register
276 *reg)
277{
278 return -1;
279}
280static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
281 *cstate)
282{
283 return;
284}
285#endif
286
287/* in processor_perflib.c */
288
289#ifdef CONFIG_CPU_FREQ
290void acpi_processor_ppc_init(void);
291void acpi_processor_ppc_exit(void);
292int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
293#else
294static inline void acpi_processor_ppc_init(void)
295{
296 return;
297}
298static inline void acpi_processor_ppc_exit(void)
299{
300 return;
301}
302static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
303{
304 static unsigned int printout = 1;
305 if (printout) {
306 printk(KERN_WARNING
307 "Warning: Processor Platform Limit event detected, but not handled.\n");
308 printk(KERN_WARNING
309 "Consider compiling CPUfreq support into your kernel.\n");
310 printout = 0;
311 }
312 return 0;
313}
314#endif /* CONFIG_CPU_FREQ */
315
316/* in processor_throttling.c */
317int acpi_processor_get_throttling_info(struct acpi_processor *pr);
318extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
319extern struct file_operations acpi_processor_throttling_fops;
320
321/* in processor_idle.c */
322int acpi_processor_power_init(struct acpi_processor *pr,
323 struct acpi_device *device);
324int acpi_processor_cst_has_changed(struct acpi_processor *pr);
325int acpi_processor_power_exit(struct acpi_processor *pr,
326 struct acpi_device *device);
327int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
328int acpi_processor_resume(struct acpi_device * device);
329extern struct cpuidle_driver acpi_idle_driver;
330
331/* in processor_thermal.c */
332int acpi_processor_get_limit_info(struct acpi_processor *pr);
333extern struct file_operations acpi_processor_limit_fops;
334
335#ifdef CONFIG_CPU_FREQ
336void acpi_thermal_cpufreq_init(void);
337void acpi_thermal_cpufreq_exit(void);
338#else
339static inline void acpi_thermal_cpufreq_init(void)
340{
341 return;
342}
343static inline void acpi_thermal_cpufreq_exit(void)
344{
345 return;
346}
347#endif
348
349#endif