summaryrefslogtreecommitdiffstats
path: root/include/acpi/processor.h
blob: 0c75a0b9c565f3e82d0125734d92a36710b79f97 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
#ifndef __ACPI_PROCESSOR_H
#define __ACPI_PROCESSOR_H

#include <linux/kernel.h>
#include <linux/cpu.h>
#include <linux/cpuidle.h>
#include <linux/thermal.h>
#include <asm/acpi.h>

#define ACPI_PROCESSOR_BUSY_METRIC	10

#define ACPI_PROCESSOR_MAX_POWER	8
#define ACPI_PROCESSOR_MAX_C2_LATENCY	100
#define ACPI_PROCESSOR_MAX_C3_LATENCY	1000

#define ACPI_PROCESSOR_MAX_THROTTLING	16
#define ACPI_PROCESSOR_MAX_THROTTLE	250	/* 25% */
#define ACPI_PROCESSOR_MAX_DUTY_WIDTH	4

#define ACPI_PDC_REVISION_ID		0x1

#define ACPI_PSD_REV0_REVISION		0	/* Support for _PSD as in ACPI 3.0 */
#define ACPI_PSD_REV0_ENTRIES		5

#define ACPI_TSD_REV0_REVISION		0	/* Support for _PSD as in ACPI 3.0 */
#define ACPI_TSD_REV0_ENTRIES		5
/*
 * Types of coordination defined in ACPI 3.0. Same macros can be used across
 * P, C and T states
 */
#define DOMAIN_COORD_TYPE_SW_ALL	0xfc
#define DOMAIN_COORD_TYPE_SW_ANY	0xfd
#define DOMAIN_COORD_TYPE_HW_ALL	0xfe

#define ACPI_CSTATE_SYSTEMIO	(0)
#define ACPI_CSTATE_FFH		(1)
#define ACPI_CSTATE_HALT	(2)

/* Power Management */

struct acpi_processor_cx;

struct acpi_power_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 reserved;
	u64 address;
} __attribute__ ((packed));

struct acpi_processor_cx_policy {
	u32 count;
	struct acpi_processor_cx *state;
	struct {
		u32 time;
		u32 ticks;
		u32 count;
		u32 bm;
	} threshold;
};

struct acpi_processor_cx {
	u8 valid;
	u8 type;
	u32 address;
	u8 entry_method;
	u8 index;
	u32 latency;
	u32 latency_ticks;
	u32 power;
	u32 usage;
	u64 time;
	struct acpi_processor_cx_policy promotion;
	struct acpi_processor_cx_policy demotion;
};

struct acpi_processor_power {
	struct cpuidle_device dev;
	struct acpi_processor_cx *state;
	unsigned long bm_check_timestamp;
	u32 default_state;
	u32 bm_activity;
	int count;
	struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
	int timer_broadcast_on_state;
};

/* Performance Management */

struct acpi_psd_package {
	acpi_integer num_entries;
	acpi_integer revision;
	acpi_integer domain;
	acpi_integer coord_type;
	acpi_integer num_processors;
} __attribute__ ((packed));

struct acpi_pct_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 reserved;
	u64 address;
} __attribute__ ((packed));

struct acpi_processor_px {
	acpi_integer core_frequency;	/* megahertz */
	acpi_integer power;	/* milliWatts */
	acpi_integer transition_latency;	/* microseconds */
	acpi_integer bus_master_latency;	/* microseconds */
	acpi_integer control;	/* control value */
	acpi_integer status;	/* success indicator */
};

struct acpi_processor_performance {
	unsigned int state;
	unsigned int platform_limit;
	struct acpi_pct_register control_register;
	struct acpi_pct_register status_register;
	unsigned int state_count;
	struct acpi_processor_px *states;
	struct acpi_psd_package domain_info;
	cpumask_t shared_cpu_map;
	unsigned int shared_type;
};

/* Throttling Control */

struct acpi_tsd_package {
	acpi_integer num_entries;
	acpi_integer revision;
	acpi_integer domain;
	acpi_integer coord_type;
	acpi_integer num_processors;
} __attribute__ ((packed));

struct acpi_ptc_register {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 reserved;
	u64 address;
} __attribute__ ((packed));

struct acpi_processor_tx_tss {
	acpi_integer freqpercentage;	/* */
	acpi_integer power;	/* milliWatts */
	acpi_integer transition_latency;	/* microseconds */
	acpi_integer control;	/* control value */
	acpi_integer status;	/* success indicator */
};
struct acpi_processor_tx {
	u16 power;
	u16 performance;
};

struct acpi_processor;
struct acpi_processor_throttling {
	unsigned int state;
	unsigned int platform_limit;
	struct acpi_pct_register control_register;
	struct acpi_pct_register status_register;
	unsigned int state_count;
	struct acpi_processor_tx_tss *states_tss;
	struct acpi_tsd_package domain_info;
	cpumask_t shared_cpu_map;
	int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
	int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
					      int state);

	u32 address;
	u8 duty_offset;
	u8 duty_width;
	struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
};

/* Limit Interface */

struct acpi_processor_lx {
	int px;			/* performance state */
	int tx;			/* throttle level */
};

struct acpi_processor_limit {
	struct acpi_processor_lx state;	/* current limit */
	struct acpi_processor_lx thermal;	/* thermal limit */
	struct acpi_processor_lx user;	/* user limit */
};

struct acpi_processor_flags {
	u8 power:1;
	u8 performance:1;
	u8 throttling:1;
	u8 limit:1;
	u8 bm_control:1;
	u8 bm_check:1;
	u8 has_cst:1;
	u8 power_setup_done:1;
	u8 bm_rld_set:1;
};

struct acpi_processor {
	acpi_handle handle;
	u32 acpi_id;
	u32 id;
	u32 pblk;
	int performance_platform_limit;
	int throttling_platform_limit;
	/* 0 - states 0..n-th state available */

	struct acpi_processor_flags flags;
	struct acpi_processor_power power;
	struct acpi_processor_performance *performance;
	struct acpi_processor_throttling throttling;
	struct acpi_processor_limit limit;
	struct thermal_cooling_device *cdev;
	/* the _PDC objects for this processor, if any */
	struct acpi_object_list *pdc;
};

struct acpi_processor_errata {
	u8 smp;
	struct {
		u8 throttle:1;
		u8 fdma:1;
		u8 reserved:6;
		u32 bmisx;
	} piix4;
};

extern int acpi_processor_preregister_performance(struct
						  acpi_processor_performance
						  *performance);

extern int acpi_processor_register_performance(struct acpi_processor_performance
					       *performance, unsigned int cpu);
extern void acpi_processor_unregister_performance(struct
						  acpi_processor_performance
						  *performance,
						  unsigned int cpu);

/* note: this locks both the calling module and the processor module
         if a _PPC object exists, rmmod is disallowed then */
int acpi_processor_notify_smm(struct module *calling_module);

/* for communication between multiple parts of the processor kernel module */
extern struct acpi_processor *processors[NR_CPUS];
extern struct acpi_processor_errata errata;

void arch_acpi_processor_init_pdc(struct acpi_processor *pr);

#ifdef ARCH_HAS_POWER_INIT
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
					unsigned int cpu);
int acpi_processor_ffh_cstate_probe(unsigned int cpu,
				    struct acpi_processor_cx *cx,
				    struct acpi_power_register *reg);
void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
#else
static inline void acpi_processor_power_init_bm_check(struct
						      acpi_processor_flags
						      *flags, unsigned int cpu)
{
	flags->bm_check = 1;
	return;
}
static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
						  struct acpi_processor_cx *cx,
						  struct acpi_power_register
						  *reg)
{
	return -1;
}
static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
						   *cstate)
{
	return;
}
#endif

/* in processor_perflib.c */

#ifdef CONFIG_CPU_FREQ
void acpi_processor_ppc_init(void);
void acpi_processor_ppc_exit(void);
int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
#else
static inline void acpi_processor_ppc_init(void)
{
	return;
}
static inline void acpi_processor_ppc_exit(void)
{
	return;
}
static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
{
	static unsigned int printout = 1;
	if (printout) {
		printk(KERN_WARNING
		       "Warning: Processor Platform Limit event detected, but not handled.\n");
		printk(KERN_WARNING
		       "Consider compiling CPUfreq support into your kernel.\n");
		printout = 0;
	}
	return 0;
}
#endif				/* CONFIG_CPU_FREQ */

/* in processor_throttling.c */
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
extern struct file_operations acpi_processor_throttling_fops;

/* in processor_idle.c */
int acpi_processor_power_init(struct acpi_processor *pr,
			      struct acpi_device *device);
int acpi_processor_cst_has_changed(struct acpi_processor *pr);
int acpi_processor_power_exit(struct acpi_processor *pr,
			      struct acpi_device *device);
int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
int acpi_processor_resume(struct acpi_device * device);
extern struct cpuidle_driver acpi_idle_driver;

/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
extern struct file_operations acpi_processor_limit_fops;
extern struct thermal_cooling_device_ops processor_cooling_ops;
#ifdef CONFIG_CPU_FREQ
void acpi_thermal_cpufreq_init(void);
void acpi_thermal_cpufreq_exit(void);
#else
static inline void acpi_thermal_cpufreq_init(void)
{
	return;
}
static inline void acpi_thermal_cpufreq_exit(void)
{
	return;
}
#endif

#endif