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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 access_size; |
52 | u64 address; |
53 | } __attribute__ ((packed)); |
54 | |
55 | struct 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 | |
70 | struct 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 | |
82 | struct 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 | |
90 | struct 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 | |
100 | struct 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 | |
109 | struct 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 | |
123 | struct 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 | |
131 | struct 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 | |
141 | struct 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 | }; |
148 | struct acpi_processor_tx { |
149 | u16 power; |
150 | u16 performance; |
151 | }; |
152 | |
153 | struct acpi_processor; |
154 | struct 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 | |
177 | struct acpi_processor_lx { |
178 | int px; /* performance state */ |
179 | int tx; /* throttle level */ |
180 | }; |
181 | |
182 | struct 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 | |
188 | struct 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 | }; |
199 | |
200 | struct acpi_processor { |
201 | acpi_handle handle; |
202 | u32 acpi_id; |
203 | u32 id; |
204 | u32 pblk; |
205 | int performance_platform_limit; |
206 | int throttling_platform_limit; |
207 | /* 0 - states 0..n-th state available */ |
208 | |
209 | struct acpi_processor_flags flags; |
210 | struct acpi_processor_power power; |
211 | struct acpi_processor_performance *performance; |
212 | struct acpi_processor_throttling throttling; |
213 | struct acpi_processor_limit limit; |
214 | struct thermal_cooling_device *cdev; |
215 | }; |
216 | |
217 | struct acpi_processor_errata { |
218 | u8 smp; |
219 | struct { |
220 | u8 throttle:1; |
221 | u8 fdma:1; |
222 | u8 reserved:6; |
223 | u32 bmisx; |
224 | } piix4; |
225 | }; |
226 | |
227 | extern int acpi_processor_preregister_performance(struct |
228 | acpi_processor_performance |
229 | __percpu *performance); |
230 | |
231 | extern int acpi_processor_register_performance(struct acpi_processor_performance |
232 | *performance, unsigned int cpu); |
233 | extern void acpi_processor_unregister_performance(struct |
234 | acpi_processor_performance |
235 | *performance, |
236 | unsigned int cpu); |
237 | |
238 | /* note: this locks both the calling module and the processor module |
239 | if a _PPC object exists, rmmod is disallowed then */ |
240 | int acpi_processor_notify_smm(struct module *calling_module); |
241 | |
242 | /* for communication between multiple parts of the processor kernel module */ |
243 | DECLARE_PER_CPU(struct acpi_processor *, processors); |
244 | extern struct acpi_processor_errata errata; |
245 | |
246 | #ifdef ARCH_HAS_POWER_INIT |
247 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
248 | unsigned int cpu); |
249 | int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
250 | struct acpi_processor_cx *cx, |
251 | struct acpi_power_register *reg); |
252 | void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); |
253 | #else |
254 | static inline void acpi_processor_power_init_bm_check(struct |
255 | acpi_processor_flags |
256 | *flags, unsigned int cpu) |
257 | { |
258 | flags->bm_check = 1; |
259 | return; |
260 | } |
261 | static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
262 | struct acpi_processor_cx *cx, |
263 | struct acpi_power_register |
264 | *reg) |
265 | { |
266 | return -1; |
267 | } |
268 | static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx |
269 | *cstate) |
270 | { |
271 | return; |
272 | } |
273 | #endif |
274 | |
275 | /* in processor_perflib.c */ |
276 | |
277 | #ifdef CONFIG_CPU_FREQ |
278 | void acpi_processor_ppc_init(void); |
279 | void acpi_processor_ppc_exit(void); |
280 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); |
281 | extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); |
282 | #else |
283 | static inline void acpi_processor_ppc_init(void) |
284 | { |
285 | return; |
286 | } |
287 | static inline void acpi_processor_ppc_exit(void) |
288 | { |
289 | return; |
290 | } |
291 | static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr, |
292 | int event_flag) |
293 | { |
294 | static unsigned int printout = 1; |
295 | if (printout) { |
296 | printk(KERN_WARNING |
297 | "Warning: Processor Platform Limit event detected, but not handled.\n"); |
298 | printk(KERN_WARNING |
299 | "Consider compiling CPUfreq support into your kernel.\n"); |
300 | printout = 0; |
301 | } |
302 | return 0; |
303 | } |
304 | static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) |
305 | { |
306 | return -ENODEV; |
307 | } |
308 | |
309 | #endif /* CONFIG_CPU_FREQ */ |
310 | |
311 | /* in processor_core.c */ |
312 | void acpi_processor_set_pdc(acpi_handle handle); |
313 | int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); |
314 | |
315 | /* in processor_throttling.c */ |
316 | int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
317 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
318 | extern int acpi_processor_set_throttling(struct acpi_processor *pr, |
319 | int state, bool force); |
320 | /* |
321 | * Reevaluate whether the T-state is invalid after one cpu is |
322 | * onlined/offlined. In such case the flags.throttling will be updated. |
323 | */ |
324 | extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, |
325 | unsigned long action); |
326 | extern const struct file_operations acpi_processor_throttling_fops; |
327 | extern void acpi_processor_throttling_init(void); |
328 | /* in processor_idle.c */ |
329 | int acpi_processor_power_init(struct acpi_processor *pr, |
330 | struct acpi_device *device); |
331 | int acpi_processor_cst_has_changed(struct acpi_processor *pr); |
332 | int acpi_processor_power_exit(struct acpi_processor *pr, |
333 | struct acpi_device *device); |
334 | int acpi_processor_suspend(struct acpi_device * device, pm_message_t state); |
335 | int acpi_processor_resume(struct acpi_device * device); |
336 | extern struct cpuidle_driver acpi_idle_driver; |
337 | |
338 | /* in processor_thermal.c */ |
339 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
340 | extern struct thermal_cooling_device_ops processor_cooling_ops; |
341 | #ifdef CONFIG_CPU_FREQ |
342 | void acpi_thermal_cpufreq_init(void); |
343 | void acpi_thermal_cpufreq_exit(void); |
344 | #else |
345 | static inline void acpi_thermal_cpufreq_init(void) |
346 | { |
347 | return; |
348 | } |
349 | static inline void acpi_thermal_cpufreq_exit(void) |
350 | { |
351 | return; |
352 | } |
353 | #endif |
354 | |
355 | #endif |
356 |
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