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#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 access_size;
52 u64 address;
53} __attribute__ ((packed));
54
55struct acpi_processor_cx {
56 u8 valid;
57 u8 type;
58 u32 address;
59 u8 entry_method;
60 u8 index;
61 u32 latency;
62 u32 latency_ticks;
63 u32 power;
64 u32 usage;
65 u64 time;
66 u8 bm_sts_skip;
67 char desc[ACPI_CX_DESC_LEN];
68};
69
70struct acpi_processor_power {
71 struct cpuidle_device dev;
72 struct acpi_processor_cx *state;
73 unsigned long bm_check_timestamp;
74 u32 default_state;
75 int count;
76 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
77 int timer_broadcast_on_state;
78};
79
80/* Performance Management */
81
82struct acpi_psd_package {
83 u64 num_entries;
84 u64 revision;
85 u64 domain;
86 u64 coord_type;
87 u64 num_processors;
88} __attribute__ ((packed));
89
90struct acpi_pct_register {
91 u8 descriptor;
92 u16 length;
93 u8 space_id;
94 u8 bit_width;
95 u8 bit_offset;
96 u8 reserved;
97 u64 address;
98} __attribute__ ((packed));
99
100struct acpi_processor_px {
101 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 */
107};
108
109struct acpi_processor_performance {
110 unsigned int state;
111 unsigned int platform_limit;
112 struct acpi_pct_register control_register;
113 struct acpi_pct_register status_register;
114 unsigned int state_count;
115 struct acpi_processor_px *states;
116 struct acpi_psd_package domain_info;
117 cpumask_var_t shared_cpu_map;
118 unsigned int shared_type;
119};
120
121/* Throttling Control */
122
123struct acpi_tsd_package {
124 u64 num_entries;
125 u64 revision;
126 u64 domain;
127 u64 coord_type;
128 u64 num_processors;
129} __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 {
142 u64 freqpercentage; /* */
143 u64 power; /* milliWatts */
144 u64 transition_latency; /* microseconds */
145 u64 control; /* control value */
146 u64 status; /* success indicator */
147};
148struct acpi_processor_tx {
149 u16 power;
150 u16 performance;
151};
152
153struct acpi_processor;
154struct acpi_processor_throttling {
155 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;
162 cpumask_var_t shared_cpu_map;
163 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
164 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
165 int state, bool force);
166
167 u32 address;
168 u8 duty_offset;
169 u8 duty_width;
170 u8 tsd_valid_flag;
171 unsigned int shared_type;
172 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
173};
174
175/* Limit Interface */
176
177struct acpi_processor_lx {
178 int px; /* performance state */
179 int tx; /* throttle level */
180};
181
182struct acpi_processor_limit {
183 struct acpi_processor_lx state; /* current limit */
184 struct acpi_processor_lx thermal; /* thermal limit */
185 struct acpi_processor_lx user; /* user limit */
186};
187
188struct acpi_processor_flags {
189 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;
197 u8 bm_rld_set:1;
198 u8 need_hotplug_init:1;
199};
200
201struct acpi_processor {
202 acpi_handle handle;
203 u32 acpi_id;
204 u32 id;
205 u32 pblk;
206 int performance_platform_limit;
207 int throttling_platform_limit;
208 /* 0 - states 0..n-th state available */
209
210 struct acpi_processor_flags flags;
211 struct acpi_processor_power power;
212 struct acpi_processor_performance *performance;
213 struct acpi_processor_throttling throttling;
214 struct acpi_processor_limit limit;
215 struct thermal_cooling_device *cdev;
216};
217
218struct acpi_processor_errata {
219 u8 smp;
220 struct {
221 u8 throttle:1;
222 u8 fdma:1;
223 u8 reserved:6;
224 u32 bmisx;
225 } piix4;
226};
227
228extern int acpi_processor_preregister_performance(struct
229 acpi_processor_performance
230 __percpu *performance);
231
232extern int acpi_processor_register_performance(struct acpi_processor_performance
233 *performance, unsigned int cpu);
234extern void acpi_processor_unregister_performance(struct
235 acpi_processor_performance
236 *performance,
237 unsigned int cpu);
238
239/* note: this locks both the calling module and the processor module
240 if a _PPC object exists, rmmod is disallowed then */
241int acpi_processor_notify_smm(struct module *calling_module);
242
243/* for communication between multiple parts of the processor kernel module */
244DECLARE_PER_CPU(struct acpi_processor *, processors);
245extern struct acpi_processor_errata errata;
246
247#ifdef ARCH_HAS_POWER_INIT
248void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
249 unsigned int cpu);
250int acpi_processor_ffh_cstate_probe(unsigned int cpu,
251 struct acpi_processor_cx *cx,
252 struct acpi_power_register *reg);
253void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
254#else
255static inline void acpi_processor_power_init_bm_check(struct
256 acpi_processor_flags
257 *flags, unsigned int cpu)
258{
259 flags->bm_check = 1;
260 return;
261}
262static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
263 struct acpi_processor_cx *cx,
264 struct acpi_power_register
265 *reg)
266{
267 return -1;
268}
269static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
270 *cstate)
271{
272 return;
273}
274#endif
275
276/* in processor_perflib.c */
277
278#ifdef CONFIG_CPU_FREQ
279void acpi_processor_ppc_init(void);
280void acpi_processor_ppc_exit(void);
281int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
282extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
283#else
284static inline void acpi_processor_ppc_init(void)
285{
286 return;
287}
288static inline void acpi_processor_ppc_exit(void)
289{
290 return;
291}
292static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
293 int event_flag)
294{
295 static unsigned int printout = 1;
296 if (printout) {
297 printk(KERN_WARNING
298 "Warning: Processor Platform Limit event detected, but not handled.\n");
299 printk(KERN_WARNING
300 "Consider compiling CPUfreq support into your kernel.\n");
301 printout = 0;
302 }
303 return 0;
304}
305static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
306{
307 return -ENODEV;
308}
309
310#endif /* CONFIG_CPU_FREQ */
311
312/* in processor_core.c */
313void acpi_processor_set_pdc(acpi_handle handle);
314int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
315
316/* in processor_throttling.c */
317int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
318int acpi_processor_get_throttling_info(struct acpi_processor *pr);
319extern int acpi_processor_set_throttling(struct acpi_processor *pr,
320 int state, bool force);
321/*
322 * Reevaluate whether the T-state is invalid after one cpu is
323 * onlined/offlined. In such case the flags.throttling will be updated.
324 */
325extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
326 unsigned long action);
327extern const struct file_operations acpi_processor_throttling_fops;
328extern void acpi_processor_throttling_init(void);
329/* in processor_idle.c */
330int acpi_processor_power_init(struct acpi_processor *pr,
331 struct acpi_device *device);
332int acpi_processor_cst_has_changed(struct acpi_processor *pr);
333int acpi_processor_hotplug(struct acpi_processor *pr);
334int acpi_processor_power_exit(struct acpi_processor *pr,
335 struct acpi_device *device);
336int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
337int acpi_processor_resume(struct acpi_device * device);
338extern struct cpuidle_driver acpi_idle_driver;
339
340/* in processor_thermal.c */
341int acpi_processor_get_limit_info(struct acpi_processor *pr);
342extern const struct thermal_cooling_device_ops processor_cooling_ops;
343#ifdef CONFIG_CPU_FREQ
344void acpi_thermal_cpufreq_init(void);
345void acpi_thermal_cpufreq_exit(void);
346#else
347static inline void acpi_thermal_cpufreq_init(void)
348{
349 return;
350}
351static inline void acpi_thermal_cpufreq_exit(void)
352{
353 return;
354}
355#endif
356
357#endif