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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/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 | |
42 | struct acpi_processor_cx; |
43 | |
44 | struct 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 | |
54 | struct 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 | |
65 | struct 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 | |
76 | struct 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 | |
84 | struct 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 | |
94 | struct 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 | |
103 | struct 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 | |
117 | struct 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 | |
125 | struct 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 | |
135 | struct 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 | }; |
142 | struct acpi_processor_tx { |
143 | u16 power; |
144 | u16 performance; |
145 | }; |
146 | |
147 | struct acpi_processor; |
148 | struct 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 | |
171 | struct acpi_processor_lx { |
172 | int px; /* performance state */ |
173 | int tx; /* throttle level */ |
174 | }; |
175 | |
176 | struct 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 | |
182 | struct 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 | |
195 | struct 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 | |
212 | struct 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 | |
222 | extern void acpi_processor_load_module(struct acpi_processor *pr); |
223 | extern int acpi_processor_preregister_performance(struct |
224 | acpi_processor_performance |
225 | __percpu *performance); |
226 | |
227 | extern int acpi_processor_register_performance(struct acpi_processor_performance |
228 | *performance, unsigned int cpu); |
229 | extern 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 */ |
236 | int acpi_processor_notify_smm(struct module *calling_module); |
237 | |
238 | /* parsing the _P* objects. */ |
239 | extern int acpi_processor_get_performance_info(struct acpi_processor *pr); |
240 | |
241 | /* for communication between multiple parts of the processor kernel module */ |
242 | DECLARE_PER_CPU(struct acpi_processor *, processors); |
243 | extern struct acpi_processor_errata errata; |
244 | |
245 | #ifdef ARCH_HAS_POWER_INIT |
246 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
247 | unsigned int cpu); |
248 | int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
249 | struct acpi_processor_cx *cx, |
250 | struct acpi_power_register *reg); |
251 | void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); |
252 | #else |
253 | static 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 | } |
260 | static 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 | } |
267 | static 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 |
277 | void acpi_processor_ppc_init(void); |
278 | void acpi_processor_ppc_exit(void); |
279 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); |
280 | extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); |
281 | #else |
282 | static inline void acpi_processor_ppc_init(void) |
283 | { |
284 | return; |
285 | } |
286 | static inline void acpi_processor_ppc_exit(void) |
287 | { |
288 | return; |
289 | } |
290 | static 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 | } |
303 | static 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 */ |
311 | void acpi_processor_set_pdc(acpi_handle handle); |
312 | int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); |
313 | |
314 | /* in processor_throttling.c */ |
315 | int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
316 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
317 | extern 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 | */ |
323 | extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, |
324 | unsigned long action); |
325 | extern const struct file_operations acpi_processor_throttling_fops; |
326 | extern void acpi_processor_throttling_init(void); |
327 | /* in processor_idle.c */ |
328 | int acpi_processor_power_init(struct acpi_processor *pr); |
329 | int acpi_processor_power_exit(struct acpi_processor *pr); |
330 | int acpi_processor_cst_has_changed(struct acpi_processor *pr); |
331 | int acpi_processor_hotplug(struct acpi_processor *pr); |
332 | int acpi_processor_suspend(struct device *dev); |
333 | int acpi_processor_resume(struct device *dev); |
334 | extern struct cpuidle_driver acpi_idle_driver; |
335 | |
336 | /* in processor_thermal.c */ |
337 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
338 | extern const struct thermal_cooling_device_ops processor_cooling_ops; |
339 | #ifdef CONFIG_CPU_FREQ |
340 | void acpi_thermal_cpufreq_init(void); |
341 | void acpi_thermal_cpufreq_exit(void); |
342 | #else |
343 | static inline void acpi_thermal_cpufreq_init(void) |
344 | { |
345 | return; |
346 | } |
347 | static inline void acpi_thermal_cpufreq_exit(void) |
348 | { |
349 | return; |
350 | } |
351 | #endif |
352 | |
353 | #endif |
354 |
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