projects/linux·blob 024a6b95 · refs

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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#define ACPI_CX_DESC_LEN 32
40
41/* Power Management */
42
43struct acpi_processor_cx;
44
45struct acpi_power_register {
46 u8 descriptor;
47 u16 length;
48 u8 space_id;
49 u8 bit_width;
50 u8 bit_offset;
51 u8 reserved;
52 u64 address;
53} __attribute__ ((packed));
54
55struct acpi_processor_cx_policy {
56 u32 count;
57 struct acpi_processor_cx *state;
58 struct {
59 u32 time;
60 u32 ticks;
61 u32 count;
62 u32 bm;
63 } threshold;
64};
65
66struct acpi_processor_cx {
67 u8 valid;
68 u8 type;
69 u32 address;
70 u8 entry_method;
71 u8 index;
72 u32 latency;
73 u32 latency_ticks;
74 u32 power;
75 u32 usage;
76 u64 time;
77 struct acpi_processor_cx_policy promotion;
78 struct acpi_processor_cx_policy demotion;
79 char desc[ACPI_CX_DESC_LEN];
80};
81
82struct acpi_processor_power {
83 struct cpuidle_device dev;
84 struct acpi_processor_cx *state;
85 unsigned long bm_check_timestamp;
86 u32 default_state;
87 int count;
88 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
89 int timer_broadcast_on_state;
90};
91
92/* Performance Management */
93
94struct acpi_psd_package {
95 u64 num_entries;
96 u64 revision;
97 u64 domain;
98 u64 coord_type;
99 u64 num_processors;
100} __attribute__ ((packed));
101
102struct acpi_pct_register {
103 u8 descriptor;
104 u16 length;
105 u8 space_id;
106 u8 bit_width;
107 u8 bit_offset;
108 u8 reserved;
109 u64 address;
110} __attribute__ ((packed));
111
112struct acpi_processor_px {
113 u64 core_frequency; /* megahertz */
114 u64 power; /* milliWatts */
115 u64 transition_latency; /* microseconds */
116 u64 bus_master_latency; /* microseconds */
117 u64 control; /* control value */
118 u64 status; /* success indicator */
119};
120
121struct acpi_processor_performance {
122 unsigned int state;
123 unsigned int platform_limit;
124 struct acpi_pct_register control_register;
125 struct acpi_pct_register status_register;
126 unsigned int state_count;
127 struct acpi_processor_px *states;
128 struct acpi_psd_package domain_info;
129 cpumask_var_t shared_cpu_map;
130 unsigned int shared_type;
131};
132
133/* Throttling Control */
134
135struct acpi_tsd_package {
136 u64 num_entries;
137 u64 revision;
138 u64 domain;
139 u64 coord_type;
140 u64 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 u64 freqpercentage; /* */
155 u64 power; /* milliWatts */
156 u64 transition_latency; /* microseconds */
157 u64 control; /* control value */
158 u64 status; /* success indicator */
159};
160struct acpi_processor_tx {
161 u16 power;
162 u16 performance;
163};
164
165struct acpi_processor;
166struct acpi_processor_throttling {
167 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;
174 cpumask_var_t shared_cpu_map;
175 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
176 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
177 int state, bool force);
178
179 u32 address;
180 u8 duty_offset;
181 u8 duty_width;
182 u8 tsd_valid_flag;
183 unsigned int shared_type;
184 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
185};
186
187/* Limit Interface */
188
189struct acpi_processor_lx {
190 int px; /* performance state */
191 int tx; /* throttle level */
192};
193
194struct acpi_processor_limit {
195 struct acpi_processor_lx state; /* current limit */
196 struct acpi_processor_lx thermal; /* thermal limit */
197 struct acpi_processor_lx user; /* user limit */
198};
199
200struct acpi_processor_flags {
201 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;
209 u8 bm_rld_set:1;
210};
211
212struct acpi_processor {
213 acpi_handle handle;
214 u32 acpi_id;
215 u32 id;
216 u32 pblk;
217 int performance_platform_limit;
218 int throttling_platform_limit;
219 /* 0 - states 0..n-th state available */
220
221 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;
226 struct thermal_cooling_device *cdev;
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 __percpu *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 */
255DECLARE_PER_CPU(struct acpi_processor *, processors);
256extern struct acpi_processor_errata errata;
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, int event_flag);
293extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
294#else
295static inline void acpi_processor_ppc_init(void)
296{
297 return;
298}
299static inline void acpi_processor_ppc_exit(void)
300{
301 return;
302}
303static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
304 int event_flag)
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}
316static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
317{
318 return -ENODEV;
319}
320
321#endif /* CONFIG_CPU_FREQ */
322
323/* in processor_core.c */
324void acpi_processor_set_pdc(acpi_handle handle);
325#ifdef CONFIG_SMP
326int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
327#else
328static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
329{
330 return -1;
331}
332#endif
333
334/* in processor_throttling.c */
335int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
336int acpi_processor_get_throttling_info(struct acpi_processor *pr);
337extern int acpi_processor_set_throttling(struct acpi_processor *pr,
338 int state, bool force);
339extern const struct file_operations acpi_processor_throttling_fops;
340extern void acpi_processor_throttling_init(void);
341/* in processor_idle.c */
342int acpi_processor_power_init(struct acpi_processor *pr,
343 struct acpi_device *device);
344int acpi_processor_cst_has_changed(struct acpi_processor *pr);
345int acpi_processor_power_exit(struct acpi_processor *pr,
346 struct acpi_device *device);
347int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
348int acpi_processor_resume(struct acpi_device * device);
349extern struct cpuidle_driver acpi_idle_driver;
350
351/* in processor_thermal.c */
352int acpi_processor_get_limit_info(struct acpi_processor *pr);
353extern const struct file_operations acpi_processor_limit_fops;
354extern struct thermal_cooling_device_ops processor_cooling_ops;
355#ifdef CONFIG_CPU_FREQ
356void acpi_thermal_cpufreq_init(void);
357void acpi_thermal_cpufreq_exit(void);
358#else
359static inline void acpi_thermal_cpufreq_init(void)
360{
361 return;
362}
363static inline void acpi_thermal_cpufreq_exit(void)
364{
365 return;
366}
367#endif
368
369#endif