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TOMOYO Linux Cross Reference
Linux/include/acpi/processor.h

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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_CLASS            "processor"
 10 #define ACPI_PROCESSOR_DEVICE_NAME      "Processor"
 11 #define ACPI_PROCESSOR_DEVICE_HID       "ACPI0007"
 12 
 13 #define ACPI_PROCESSOR_BUSY_METRIC      10
 14 
 15 #define ACPI_PROCESSOR_MAX_POWER        8
 16 #define ACPI_PROCESSOR_MAX_C2_LATENCY   100
 17 #define ACPI_PROCESSOR_MAX_C3_LATENCY   1000
 18 
 19 #define ACPI_PROCESSOR_MAX_THROTTLING   16
 20 #define ACPI_PROCESSOR_MAX_THROTTLE     250     /* 25% */
 21 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH   4
 22 
 23 #define ACPI_PDC_REVISION_ID            0x1
 24 
 25 #define ACPI_PSD_REV0_REVISION          0       /* Support for _PSD as in ACPI 3.0 */
 26 #define ACPI_PSD_REV0_ENTRIES           5
 27 
 28 #define ACPI_TSD_REV0_REVISION          0       /* Support for _PSD as in ACPI 3.0 */
 29 #define ACPI_TSD_REV0_ENTRIES           5
 30 /*
 31  * Types of coordination defined in ACPI 3.0. Same macros can be used across
 32  * P, C and T states
 33  */
 34 #define DOMAIN_COORD_TYPE_SW_ALL        0xfc
 35 #define DOMAIN_COORD_TYPE_SW_ANY        0xfd
 36 #define DOMAIN_COORD_TYPE_HW_ALL        0xfe
 37 
 38 #define ACPI_CSTATE_SYSTEMIO    0
 39 #define ACPI_CSTATE_FFH         1
 40 #define ACPI_CSTATE_HALT        2
 41 
 42 #define ACPI_CX_DESC_LEN        32
 43 
 44 /* Power Management */
 45 
 46 struct acpi_processor_cx;
 47 
 48 struct acpi_power_register {
 49         u8 descriptor;
 50         u16 length;
 51         u8 space_id;
 52         u8 bit_width;
 53         u8 bit_offset;
 54         u8 access_size;
 55         u64 address;
 56 } __attribute__ ((packed));
 57 
 58 struct acpi_processor_cx {
 59         u8 valid;
 60         u8 type;
 61         u32 address;
 62         u8 entry_method;
 63         u8 index;
 64         u32 latency;
 65         u8 bm_sts_skip;
 66         char desc[ACPI_CX_DESC_LEN];
 67 };
 68 
 69 struct acpi_processor_power {
 70         struct acpi_processor_cx *state;
 71         unsigned long bm_check_timestamp;
 72         u32 default_state;
 73         int count;
 74         struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
 75         int timer_broadcast_on_state;
 76 };
 77 
 78 /* Performance Management */
 79 
 80 struct acpi_psd_package {
 81         u64 num_entries;
 82         u64 revision;
 83         u64 domain;
 84         u64 coord_type;
 85         u64 num_processors;
 86 } __attribute__ ((packed));
 87 
 88 struct acpi_pct_register {
 89         u8 descriptor;
 90         u16 length;
 91         u8 space_id;
 92         u8 bit_width;
 93         u8 bit_offset;
 94         u8 reserved;
 95         u64 address;
 96 } __attribute__ ((packed));
 97 
 98 struct acpi_processor_px {
 99         u64 core_frequency;     /* megahertz */
100         u64 power;      /* milliWatts */
101         u64 transition_latency; /* microseconds */
102         u64 bus_master_latency; /* microseconds */
103         u64 control;    /* control value */
104         u64 status;     /* success indicator */
105 };
106 
107 struct acpi_processor_performance {
108         unsigned int state;
109         unsigned int platform_limit;
110         struct acpi_pct_register control_register;
111         struct acpi_pct_register status_register;
112         unsigned int state_count;
113         struct acpi_processor_px *states;
114         struct acpi_psd_package domain_info;
115         cpumask_var_t shared_cpu_map;
116         unsigned int shared_type;
117 };
118 
119 /* Throttling Control */
120 
121 struct acpi_tsd_package {
122         u64 num_entries;
123         u64 revision;
124         u64 domain;
125         u64 coord_type;
126         u64 num_processors;
127 } __attribute__ ((packed));
128 
129 struct acpi_ptc_register {
130         u8 descriptor;
131         u16 length;
132         u8 space_id;
133         u8 bit_width;
134         u8 bit_offset;
135         u8 reserved;
136         u64 address;
137 } __attribute__ ((packed));
138 
139 struct acpi_processor_tx_tss {
140         u64 freqpercentage;     /* */
141         u64 power;      /* milliWatts */
142         u64 transition_latency; /* microseconds */
143         u64 control;    /* control value */
144         u64 status;     /* success indicator */
145 };
146 struct acpi_processor_tx {
147         u16 power;
148         u16 performance;
149 };
150 
151 struct acpi_processor;
152 struct acpi_processor_throttling {
153         unsigned int state;
154         unsigned int platform_limit;
155         struct acpi_pct_register control_register;
156         struct acpi_pct_register status_register;
157         unsigned int state_count;
158         struct acpi_processor_tx_tss *states_tss;
159         struct acpi_tsd_package domain_info;
160         cpumask_var_t shared_cpu_map;
161         int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
162         int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
163                                               int state, bool force);
164 
165         u32 address;
166         u8 duty_offset;
167         u8 duty_width;
168         u8 tsd_valid_flag;
169         unsigned int shared_type;
170         struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
171 };
172 
173 /* Limit Interface */
174 
175 struct acpi_processor_lx {
176         int px;                 /* performance state */
177         int tx;                 /* throttle level */
178 };
179 
180 struct acpi_processor_limit {
181         struct acpi_processor_lx state; /* current limit */
182         struct acpi_processor_lx thermal;       /* thermal limit */
183         struct acpi_processor_lx user;  /* user limit */
184 };
185 
186 struct acpi_processor_flags {
187         u8 power:1;
188         u8 performance:1;
189         u8 throttling:1;
190         u8 limit:1;
191         u8 bm_control:1;
192         u8 bm_check:1;
193         u8 has_cst:1;
194         u8 power_setup_done:1;
195         u8 bm_rld_set:1;
196         u8 need_hotplug_init:1;
197 };
198 
199 struct acpi_processor {
200         acpi_handle handle;
201         u32 acpi_id;
202         u32 id;
203         u32 pblk;
204         int performance_platform_limit;
205         int throttling_platform_limit;
206         /* 0 - states 0..n-th state available */
207 
208         struct acpi_processor_flags flags;
209         struct acpi_processor_power power;
210         struct acpi_processor_performance *performance;
211         struct acpi_processor_throttling throttling;
212         struct acpi_processor_limit limit;
213         struct thermal_cooling_device *cdev;
214         struct device *dev; /* Processor device. */
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 void acpi_processor_load_module(struct acpi_processor *pr);
228 extern int acpi_processor_preregister_performance(struct
229                                                   acpi_processor_performance
230                                                   __percpu *performance);
231 
232 extern int acpi_processor_register_performance(struct acpi_processor_performance
233                                                *performance, unsigned int cpu);
234 extern void acpi_processor_unregister_performance(struct
235                                                   acpi_processor_performance
236                                                   *performance,
237                                                   unsigned int cpu);
238 
239 /* note: this locks both the calling module and the processor module
240          if a _PPC object exists, rmmod is disallowed then */
241 int acpi_processor_notify_smm(struct module *calling_module);
242 
243 /* parsing the _P* objects. */
244 extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
245 
246 /* for communication between multiple parts of the processor kernel module */
247 DECLARE_PER_CPU(struct acpi_processor *, processors);
248 extern struct acpi_processor_errata errata;
249 
250 #ifdef ARCH_HAS_POWER_INIT
251 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
252                                         unsigned int cpu);
253 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
254                                     struct acpi_processor_cx *cx,
255                                     struct acpi_power_register *reg);
256 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
257 #else
258 static inline void acpi_processor_power_init_bm_check(struct
259                                                       acpi_processor_flags
260                                                       *flags, unsigned int cpu)
261 {
262         flags->bm_check = 1;
263         return;
264 }
265 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
266                                                   struct acpi_processor_cx *cx,
267                                                   struct acpi_power_register
268                                                   *reg)
269 {
270         return -1;
271 }
272 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
273                                                    *cstate)
274 {
275         return;
276 }
277 #endif
278 
279 /* in processor_perflib.c */
280 
281 #ifdef CONFIG_CPU_FREQ
282 void acpi_processor_ppc_init(void);
283 void acpi_processor_ppc_exit(void);
284 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
285 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
286 #else
287 static inline void acpi_processor_ppc_init(void)
288 {
289         return;
290 }
291 static inline void acpi_processor_ppc_exit(void)
292 {
293         return;
294 }
295 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
296                                                                 int event_flag)
297 {
298         static unsigned int printout = 1;
299         if (printout) {
300                 printk(KERN_WARNING
301                        "Warning: Processor Platform Limit event detected, but not handled.\n");
302                 printk(KERN_WARNING
303                        "Consider compiling CPUfreq support into your kernel.\n");
304                 printout = 0;
305         }
306         return 0;
307 }
308 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
309 {
310         return -ENODEV;
311 }
312 
313 #endif                          /* CONFIG_CPU_FREQ */
314 
315 /* in processor_core.c */
316 void acpi_processor_set_pdc(acpi_handle handle);
317 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
318 
319 /* in processor_throttling.c */
320 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
321 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
322 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
323                                          int state, bool force);
324 /*
325  * Reevaluate whether the T-state is invalid after one cpu is
326  * onlined/offlined. In such case the flags.throttling will be updated.
327  */
328 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
329                         unsigned long action);
330 extern const struct file_operations acpi_processor_throttling_fops;
331 extern void acpi_processor_throttling_init(void);
332 /* in processor_idle.c */
333 int acpi_processor_power_init(struct acpi_processor *pr);
334 int acpi_processor_power_exit(struct acpi_processor *pr);
335 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
336 int acpi_processor_hotplug(struct acpi_processor *pr);
337 extern struct cpuidle_driver acpi_idle_driver;
338 
339 #ifdef CONFIG_PM_SLEEP
340 void acpi_processor_syscore_init(void);
341 void acpi_processor_syscore_exit(void);
342 #else
343 static inline void acpi_processor_syscore_init(void) {}
344 static inline void acpi_processor_syscore_exit(void) {}
345 #endif
346 
347 /* in processor_thermal.c */
348 int acpi_processor_get_limit_info(struct acpi_processor *pr);
349 extern const struct thermal_cooling_device_ops processor_cooling_ops;
350 #ifdef CONFIG_CPU_FREQ
351 void acpi_thermal_cpufreq_init(void);
352 void acpi_thermal_cpufreq_exit(void);
353 #else
354 static inline void acpi_thermal_cpufreq_init(void)
355 {
356         return;
357 }
358 static inline void acpi_thermal_cpufreq_exit(void)
359 {
360         return;
361 }
362 #endif
363 
364 #endif
365 

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