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 u32 bm_activity;
88 int count;
89 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
90 int timer_broadcast_on_state;
91 };
92
93 /* Performance Management */
94
95 struct acpi_psd_package {
96 acpi_integer num_entries;
97 acpi_integer revision;
98 acpi_integer domain;
99 acpi_integer coord_type;
100 acpi_integer num_processors;
101 } __attribute__ ((packed));
102
103 struct acpi_pct_register {
104 u8 descriptor;
105 u16 length;
106 u8 space_id;
107 u8 bit_width;
108 u8 bit_offset;
109 u8 reserved;
110 u64 address;
111 } __attribute__ ((packed));
112
113 struct acpi_processor_px {
114 acpi_integer core_frequency; /* megahertz */
115 acpi_integer power; /* milliWatts */
116 acpi_integer transition_latency; /* microseconds */
117 acpi_integer bus_master_latency; /* microseconds */
118 acpi_integer control; /* control value */
119 acpi_integer status; /* success indicator */
120 };
121
122 struct acpi_processor_performance {
123 unsigned int state;
124 unsigned int platform_limit;
125 struct acpi_pct_register control_register;
126 struct acpi_pct_register status_register;
127 unsigned int state_count;
128 struct acpi_processor_px *states;
129 struct acpi_psd_package domain_info;
130 cpumask_t shared_cpu_map;
131 unsigned int shared_type;
132 };
133
134 /* Throttling Control */
135
136 struct acpi_tsd_package {
137 acpi_integer num_entries;
138 acpi_integer revision;
139 acpi_integer domain;
140 acpi_integer coord_type;
141 acpi_integer num_processors;
142 } __attribute__ ((packed));
143
144 struct acpi_ptc_register {
145 u8 descriptor;
146 u16 length;
147 u8 space_id;
148 u8 bit_width;
149 u8 bit_offset;
150 u8 reserved;
151 u64 address;
152 } __attribute__ ((packed));
153
154 struct acpi_processor_tx_tss {
155 acpi_integer freqpercentage; /* */
156 acpi_integer power; /* milliWatts */
157 acpi_integer transition_latency; /* microseconds */
158 acpi_integer control; /* control value */
159 acpi_integer status; /* success indicator */
160 };
161 struct acpi_processor_tx {
162 u16 power;
163 u16 performance;
164 };
165
166 struct acpi_processor;
167 struct acpi_processor_throttling {
168 unsigned int state;
169 unsigned int platform_limit;
170 struct acpi_pct_register control_register;
171 struct acpi_pct_register status_register;
172 unsigned int state_count;
173 struct acpi_processor_tx_tss *states_tss;
174 struct acpi_tsd_package domain_info;
175 cpumask_t shared_cpu_map;
176 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
177 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
178 int state);
179
180 u32 address;
181 u8 duty_offset;
182 u8 duty_width;
183 u8 tsd_valid_flag;
184 unsigned int shared_type;
185 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
186 };
187
188 /* Limit Interface */
189
190 struct acpi_processor_lx {
191 int px; /* performance state */
192 int tx; /* throttle level */
193 };
194
195 struct acpi_processor_limit {
196 struct acpi_processor_lx state; /* current limit */
197 struct acpi_processor_lx thermal; /* thermal limit */
198 struct acpi_processor_lx user; /* user limit */
199 };
200
201 struct acpi_processor_flags {
202 u8 power:1;
203 u8 performance:1;
204 u8 throttling:1;
205 u8 limit:1;
206 u8 bm_control:1;
207 u8 bm_check:1;
208 u8 has_cst:1;
209 u8 power_setup_done:1;
210 u8 bm_rld_set:1;
211 };
212
213 struct acpi_processor {
214 acpi_handle handle;
215 u32 acpi_id;
216 u32 id;
217 u32 pblk;
218 int performance_platform_limit;
219 int throttling_platform_limit;
220 /* 0 - states 0..n-th state available */
221
222 struct acpi_processor_flags flags;
223 struct acpi_processor_power power;
224 struct acpi_processor_performance *performance;
225 struct acpi_processor_throttling throttling;
226 struct acpi_processor_limit limit;
227 struct thermal_cooling_device *cdev;
228 /* the _PDC objects for this processor, if any */
229 struct acpi_object_list *pdc;
230 };
231
232 struct acpi_processor_errata {
233 u8 smp;
234 struct {
235 u8 throttle:1;
236 u8 fdma:1;
237 u8 reserved:6;
238 u32 bmisx;
239 } piix4;
240 };
241
242 extern int acpi_processor_preregister_performance(struct
243 acpi_processor_performance
244 *performance);
245
246 extern int acpi_processor_register_performance(struct acpi_processor_performance
247 *performance, unsigned int cpu);
248 extern void acpi_processor_unregister_performance(struct
249 acpi_processor_performance
250 *performance,
251 unsigned int cpu);
252
253 /* note: this locks both the calling module and the processor module
254 if a _PPC object exists, rmmod is disallowed then */
255 int acpi_processor_notify_smm(struct module *calling_module);
256
257 /* for communication between multiple parts of the processor kernel module */
258 extern struct acpi_processor *processors[NR_CPUS];
259 extern struct acpi_processor_errata errata;
260
261 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
262
263 #ifdef ARCH_HAS_POWER_INIT
264 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
265 unsigned int cpu);
266 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
267 struct acpi_processor_cx *cx,
268 struct acpi_power_register *reg);
269 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
270 #else
271 static inline void acpi_processor_power_init_bm_check(struct
272 acpi_processor_flags
273 *flags, unsigned int cpu)
274 {
275 flags->bm_check = 1;
276 return;
277 }
278 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
279 struct acpi_processor_cx *cx,
280 struct acpi_power_register
281 *reg)
282 {
283 return -1;
284 }
285 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
286 *cstate)
287 {
288 return;
289 }
290 #endif
291
292 /* in processor_perflib.c */
293
294 #ifdef CONFIG_CPU_FREQ
295 void acpi_processor_ppc_init(void);
296 void acpi_processor_ppc_exit(void);
297 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
298 #else
299 static inline void acpi_processor_ppc_init(void)
300 {
301 return;
302 }
303 static inline void acpi_processor_ppc_exit(void)
304 {
305 return;
306 }
307 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
308 {
309 static unsigned int printout = 1;
310 if (printout) {
311 printk(KERN_WARNING
312 "Warning: Processor Platform Limit event detected, but not handled.\n");
313 printk(KERN_WARNING
314 "Consider compiling CPUfreq support into your kernel.\n");
315 printout = 0;
316 }
317 return 0;
318 }
319 #endif /* CONFIG_CPU_FREQ */
320
321 /* in processor_throttling.c */
322 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
323 extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
324 extern struct file_operations acpi_processor_throttling_fops;
325 extern void acpi_processor_throttling_init(void);
326 /* in processor_idle.c */
327 int acpi_processor_power_init(struct acpi_processor *pr,
328 struct acpi_device *device);
329 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
330 int acpi_processor_power_exit(struct acpi_processor *pr,
331 struct acpi_device *device);
332 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
333 int acpi_processor_resume(struct acpi_device * device);
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 struct file_operations acpi_processor_limit_fops;
339 extern struct thermal_cooling_device_ops processor_cooling_ops;
340 #ifdef CONFIG_CPU_FREQ
341 void acpi_thermal_cpufreq_init(void);
342 void acpi_thermal_cpufreq_exit(void);
343 #else
344 static inline void acpi_thermal_cpufreq_init(void)
345 {
346 return;
347 }
348 static inline void acpi_thermal_cpufreq_exit(void)
349 {
350 return;
351 }
352 #endif
353
354 #endif
355
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