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/thermal.h>
7#include <asm/acpi.h>
8
9#define ACPI_PROCESSOR_BUSY_METRIC 10
10
11#define ACPI_PROCESSOR_MAX_POWER 8
12#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
13#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
14
15#define ACPI_PROCESSOR_MAX_THROTTLING 16
16#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
17#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
18
19#define ACPI_PDC_REVISION_ID 0x1
20
21#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
22#define ACPI_PSD_REV0_ENTRIES 5
23
24#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
25#define ACPI_TSD_REV0_ENTRIES 5
26/*
27 * Types of coordination defined in ACPI 3.0. Same macros can be used across
28 * P, C and T states
29 */
30#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
31#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
32#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
33
34#define ACPI_CSTATE_SYSTEMIO 0
35#define ACPI_CSTATE_FFH 1
36#define ACPI_CSTATE_HALT 2
37
38#define ACPI_CX_DESC_LEN 32
39
40/* Power Management */
41
42struct acpi_processor_cx;
43
44struct acpi_power_register {
45 u8 descriptor;
46 u16 length;
47 u8 space_id;
48 u8 bit_width;
49 u8 bit_offset;
50 u8 access_size;
51 u64 address;
52} __attribute__ ((packed));
53
54struct acpi_processor_cx {
55 u8 valid;
56 u8 type;
57 u32 address;
58 u8 entry_method;
59 u8 index;
60 u32 latency;
61 u8 bm_sts_skip;
62 char desc[ACPI_CX_DESC_LEN];
63};
64
65struct acpi_processor_power {
66 struct acpi_processor_cx *state;
67 unsigned long bm_check_timestamp;
68 u32 default_state;
69 int count;
70 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
71 int timer_broadcast_on_state;
72};
73
74/* Performance Management */
75
76struct acpi_psd_package {
77 u64 num_entries;
78 u64 revision;
79 u64 domain;
80 u64 coord_type;
81 u64 num_processors;
82} __attribute__ ((packed));
83
84struct acpi_pct_register {
85 u8 descriptor;
86 u16 length;
87 u8 space_id;
88 u8 bit_width;
89 u8 bit_offset;
90 u8 reserved;
91 u64 address;
92} __attribute__ ((packed));
93
94struct acpi_processor_px {
95 u64 core_frequency; /* megahertz */
96 u64 power; /* milliWatts */
97 u64 transition_latency; /* microseconds */
98 u64 bus_master_latency; /* microseconds */
99 u64 control; /* control value */
100 u64 status; /* success indicator */
101};
102
103struct acpi_processor_performance {
104 unsigned int state;
105 unsigned int platform_limit;
106 struct acpi_pct_register control_register;
107 struct acpi_pct_register status_register;
108 unsigned int state_count;
109 struct acpi_processor_px *states;
110 struct acpi_psd_package domain_info;
111 cpumask_var_t shared_cpu_map;
112 unsigned int shared_type;
113};
114
115/* Throttling Control */
116
117struct acpi_tsd_package {
118 u64 num_entries;
119 u64 revision;
120 u64 domain;
121 u64 coord_type;
122 u64 num_processors;
123} __attribute__ ((packed));
124
125struct acpi_ptc_register {
126 u8 descriptor;
127 u16 length;
128 u8 space_id;
129 u8 bit_width;
130 u8 bit_offset;
131 u8 reserved;
132 u64 address;
133} __attribute__ ((packed));
134
135struct acpi_processor_tx_tss {
136 u64 freqpercentage; /* */
137 u64 power; /* milliWatts */
138 u64 transition_latency; /* microseconds */
139 u64 control; /* control value */
140 u64 status; /* success indicator */
141};
142struct acpi_processor_tx {
143 u16 power;
144 u16 performance;
145};
146
147struct acpi_processor;
148struct acpi_processor_throttling {
149 unsigned int state;
150 unsigned int platform_limit;
151 struct acpi_pct_register control_register;
152 struct acpi_pct_register status_register;
153 unsigned int state_count;
154 struct acpi_processor_tx_tss *states_tss;
155 struct acpi_tsd_package domain_info;
156 cpumask_var_t shared_cpu_map;
157 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
158 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
159 int state, bool force);
160
161 u32 address;
162 u8 duty_offset;
163 u8 duty_width;
164 u8 tsd_valid_flag;
165 unsigned int shared_type;
166 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
167};
168
169/* Limit Interface */
170
171struct acpi_processor_lx {
172 int px; /* performance state */
173 int tx; /* throttle level */
174};
175
176struct acpi_processor_limit {
177 struct acpi_processor_lx state; /* current limit */
178 struct acpi_processor_lx thermal; /* thermal limit */
179 struct acpi_processor_lx user; /* user limit */
180};
181
182struct acpi_processor_flags {
183 u8 power:1;
184 u8 performance:1;
185 u8 throttling:1;
186 u8 limit:1;
187 u8 bm_control:1;
188 u8 bm_check:1;
189 u8 has_cst:1;
190 u8 power_setup_done:1;
191 u8 bm_rld_set:1;
192 u8 need_hotplug_init:1;
193};
194
195struct acpi_processor {
196 acpi_handle handle;
197 u32 acpi_id;
198 u32 id;
199 u32 pblk;
200 int performance_platform_limit;
201 int throttling_platform_limit;
202 /* 0 - states 0..n-th state available */
203
204 struct acpi_processor_flags flags;
205 struct acpi_processor_power power;
206 struct acpi_processor_performance *performance;
207 struct acpi_processor_throttling throttling;
208 struct acpi_processor_limit limit;
209 struct thermal_cooling_device *cdev;
210};
211
212struct acpi_processor_errata {
213 u8 smp;
214 struct {
215 u8 throttle:1;
216 u8 fdma:1;
217 u8 reserved:6;
218 u32 bmisx;
219 } piix4;
220};
221
222extern void acpi_processor_load_module(struct acpi_processor *pr);
223extern int acpi_processor_preregister_performance(struct
224 acpi_processor_performance
225 __percpu *performance);
226
227extern int acpi_processor_register_performance(struct acpi_processor_performance
228 *performance, unsigned int cpu);
229extern void acpi_processor_unregister_performance(struct
230 acpi_processor_performance
231 *performance,
232 unsigned int cpu);
233
234/* note: this locks both the calling module and the processor module
235 if a _PPC object exists, rmmod is disallowed then */
236int acpi_processor_notify_smm(struct module *calling_module);
237
238/* parsing the _P* objects. */
239extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
240
241/* for communication between multiple parts of the processor kernel module */
242DECLARE_PER_CPU(struct acpi_processor *, processors);
243extern struct acpi_processor_errata errata;
244
245#ifdef ARCH_HAS_POWER_INIT
246void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
247 unsigned int cpu);
248int acpi_processor_ffh_cstate_probe(unsigned int cpu,
249 struct acpi_processor_cx *cx,
250 struct acpi_power_register *reg);
251void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
252#else
253static inline void acpi_processor_power_init_bm_check(struct
254 acpi_processor_flags
255 *flags, unsigned int cpu)
256{
257 flags->bm_check = 1;
258 return;
259}
260static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
261 struct acpi_processor_cx *cx,
262 struct acpi_power_register
263 *reg)
264{
265 return -1;
266}
267static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
268 *cstate)
269{
270 return;
271}
272#endif
273
274/* in processor_perflib.c */
275
276#ifdef CONFIG_CPU_FREQ
277void acpi_processor_ppc_init(void);
278void acpi_processor_ppc_exit(void);
279int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
280extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
281#else
282static inline void acpi_processor_ppc_init(void)
283{
284 return;
285}
286static inline void acpi_processor_ppc_exit(void)
287{
288 return;
289}
290static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
291 int event_flag)
292{
293 static unsigned int printout = 1;
294 if (printout) {
295 printk(KERN_WARNING
296 "Warning: Processor Platform Limit event detected, but not handled.\n");
297 printk(KERN_WARNING
298 "Consider compiling CPUfreq support into your kernel.\n");
299 printout = 0;
300 }
301 return 0;
302}
303static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
304{
305 return -ENODEV;
306}
307
308#endif /* CONFIG_CPU_FREQ */
309
310/* in processor_core.c */
311void acpi_processor_set_pdc(acpi_handle handle);
312int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
313
314/* in processor_throttling.c */
315int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
316int acpi_processor_get_throttling_info(struct acpi_processor *pr);
317extern int acpi_processor_set_throttling(struct acpi_processor *pr,
318 int state, bool force);
319/*
320 * Reevaluate whether the T-state is invalid after one cpu is
321 * onlined/offlined. In such case the flags.throttling will be updated.
322 */
323extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
324 unsigned long action);
325extern const struct file_operations acpi_processor_throttling_fops;
326extern void acpi_processor_throttling_init(void);
327/* in processor_idle.c */
328int acpi_processor_power_init(struct acpi_processor *pr);
329int acpi_processor_power_exit(struct acpi_processor *pr);
330int acpi_processor_cst_has_changed(struct acpi_processor *pr);
331int acpi_processor_hotplug(struct acpi_processor *pr);
332extern struct cpuidle_driver acpi_idle_driver;
333
334#ifdef CONFIG_PM_SLEEP
335void acpi_processor_syscore_init(void);
336void acpi_processor_syscore_exit(void);
337#else
338static inline void acpi_processor_syscore_init(void) {}
339static inline void acpi_processor_syscore_exit(void) {}
340#endif
341
342/* in processor_thermal.c */
343int acpi_processor_get_limit_info(struct acpi_processor *pr);
344extern const struct thermal_cooling_device_ops processor_cooling_ops;
345#ifdef CONFIG_CPU_FREQ
346void acpi_thermal_cpufreq_init(void);
347void acpi_thermal_cpufreq_exit(void);
348#else
349static inline void acpi_thermal_cpufreq_init(void)
350{
351 return;
352}
353static inline void acpi_thermal_cpufreq_exit(void)
354{
355 return;
356}
357#endif
358
359#endif