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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 | |
43 | struct acpi_processor_cx; |
44 | |
45 | struct 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 | |
55 | struct 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 | |
66 | struct 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 | |
82 | struct 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 | |
94 | struct 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 | |
102 | struct 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 | |
112 | struct 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 | |
121 | struct 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 | |
135 | struct 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 | |
143 | struct 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 | |
153 | struct 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 | }; |
160 | struct acpi_processor_tx { |
161 | u16 power; |
162 | u16 performance; |
163 | }; |
164 | |
165 | struct acpi_processor; |
166 | struct 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 | |
189 | struct acpi_processor_lx { |
190 | int px; /* performance state */ |
191 | int tx; /* throttle level */ |
192 | }; |
193 | |
194 | struct 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 | |
200 | struct 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 | |
212 | struct 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 | |
229 | struct 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 | |
239 | extern int acpi_processor_preregister_performance(struct |
240 | acpi_processor_performance |
241 | __percpu *performance); |
242 | |
243 | extern int acpi_processor_register_performance(struct acpi_processor_performance |
244 | *performance, unsigned int cpu); |
245 | extern 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 */ |
252 | int acpi_processor_notify_smm(struct module *calling_module); |
253 | |
254 | /* for communication between multiple parts of the processor kernel module */ |
255 | DECLARE_PER_CPU(struct acpi_processor *, processors); |
256 | extern struct acpi_processor_errata errata; |
257 | |
258 | #ifdef ARCH_HAS_POWER_INIT |
259 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
260 | unsigned int cpu); |
261 | int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
262 | struct acpi_processor_cx *cx, |
263 | struct acpi_power_register *reg); |
264 | void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); |
265 | #else |
266 | static 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 | } |
273 | static 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 | } |
280 | static 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 |
290 | void acpi_processor_ppc_init(void); |
291 | void acpi_processor_ppc_exit(void); |
292 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); |
293 | extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); |
294 | #else |
295 | static inline void acpi_processor_ppc_init(void) |
296 | { |
297 | return; |
298 | } |
299 | static inline void acpi_processor_ppc_exit(void) |
300 | { |
301 | return; |
302 | } |
303 | static 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 | } |
316 | static 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 */ |
324 | void acpi_processor_set_pdc(acpi_handle handle); |
325 | #ifdef CONFIG_SMP |
326 | int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); |
327 | #else |
328 | static 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 */ |
335 | int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
336 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
337 | extern int acpi_processor_set_throttling(struct acpi_processor *pr, |
338 | int state, bool force); |
339 | extern const struct file_operations acpi_processor_throttling_fops; |
340 | extern void acpi_processor_throttling_init(void); |
341 | /* in processor_idle.c */ |
342 | int acpi_processor_power_init(struct acpi_processor *pr, |
343 | struct acpi_device *device); |
344 | int acpi_processor_cst_has_changed(struct acpi_processor *pr); |
345 | int acpi_processor_power_exit(struct acpi_processor *pr, |
346 | struct acpi_device *device); |
347 | int acpi_processor_suspend(struct acpi_device * device, pm_message_t state); |
348 | int acpi_processor_resume(struct acpi_device * device); |
349 | extern struct cpuidle_driver acpi_idle_driver; |
350 | |
351 | /* in processor_thermal.c */ |
352 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
353 | extern const struct file_operations acpi_processor_limit_fops; |
354 | extern struct thermal_cooling_device_ops processor_cooling_ops; |
355 | #ifdef CONFIG_CPU_FREQ |
356 | void acpi_thermal_cpufreq_init(void); |
357 | void acpi_thermal_cpufreq_exit(void); |
358 | #else |
359 | static inline void acpi_thermal_cpufreq_init(void) |
360 | { |
361 | return; |
362 | } |
363 | static inline void acpi_thermal_cpufreq_exit(void) |
364 | { |
365 | return; |
366 | } |
367 | #endif |
368 | |
369 | #endif |
370 |
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