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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/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         u8 need_hotplug_init:1;
199 };
200 
201 struct acpi_processor {
202         acpi_handle handle;
203         u32 acpi_id;
204         u32 id;
205         u32 pblk;
206         int performance_platform_limit;
207         int throttling_platform_limit;
208         /* 0 - states 0..n-th state available */
209 
210         struct acpi_processor_flags flags;
211         struct acpi_processor_power power;
212         struct acpi_processor_performance *performance;
213         struct acpi_processor_throttling throttling;
214         struct acpi_processor_limit limit;
215         struct thermal_cooling_device *cdev;
216 };
217 
218 struct acpi_processor_errata {
219         u8 smp;
220         struct {
221                 u8 throttle:1;
222                 u8 fdma:1;
223                 u8 reserved:6;
224                 u32 bmisx;
225         } piix4;
226 };
227 
228 extern void acpi_processor_load_module(struct acpi_processor *pr);
229 extern int acpi_processor_preregister_performance(struct
230                                                   acpi_processor_performance
231                                                   __percpu *performance);
232 
233 extern int acpi_processor_register_performance(struct acpi_processor_performance
234                                                *performance, unsigned int cpu);
235 extern void acpi_processor_unregister_performance(struct
236                                                   acpi_processor_performance
237                                                   *performance,
238                                                   unsigned int cpu);
239 
240 /* note: this locks both the calling module and the processor module
241          if a _PPC object exists, rmmod is disallowed then */
242 int acpi_processor_notify_smm(struct module *calling_module);
243 
244 /* for communication between multiple parts of the processor kernel module */
245 DECLARE_PER_CPU(struct acpi_processor *, processors);
246 extern struct acpi_processor_errata errata;
247 
248 #ifdef ARCH_HAS_POWER_INIT
249 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
250                                         unsigned int cpu);
251 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
252                                     struct acpi_processor_cx *cx,
253                                     struct acpi_power_register *reg);
254 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
255 #else
256 static inline void acpi_processor_power_init_bm_check(struct
257                                                       acpi_processor_flags
258                                                       *flags, unsigned int cpu)
259 {
260         flags->bm_check = 1;
261         return;
262 }
263 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
264                                                   struct acpi_processor_cx *cx,
265                                                   struct acpi_power_register
266                                                   *reg)
267 {
268         return -1;
269 }
270 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
271                                                    *cstate)
272 {
273         return;
274 }
275 #endif
276 
277 /* in processor_perflib.c */
278 
279 #ifdef CONFIG_CPU_FREQ
280 void acpi_processor_ppc_init(void);
281 void acpi_processor_ppc_exit(void);
282 int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
283 extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
284 #else
285 static inline void acpi_processor_ppc_init(void)
286 {
287         return;
288 }
289 static inline void acpi_processor_ppc_exit(void)
290 {
291         return;
292 }
293 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
294                                                                 int event_flag)
295 {
296         static unsigned int printout = 1;
297         if (printout) {
298                 printk(KERN_WARNING
299                        "Warning: Processor Platform Limit event detected, but not handled.\n");
300                 printk(KERN_WARNING
301                        "Consider compiling CPUfreq support into your kernel.\n");
302                 printout = 0;
303         }
304         return 0;
305 }
306 static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
307 {
308         return -ENODEV;
309 }
310 
311 #endif                          /* CONFIG_CPU_FREQ */
312 
313 /* in processor_core.c */
314 void acpi_processor_set_pdc(acpi_handle handle);
315 int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
316 
317 /* in processor_throttling.c */
318 int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
319 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
320 extern int acpi_processor_set_throttling(struct acpi_processor *pr,
321                                          int state, bool force);
322 /*
323  * Reevaluate whether the T-state is invalid after one cpu is
324  * onlined/offlined. In such case the flags.throttling will be updated.
325  */
326 extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
327                         unsigned long action);
328 extern const struct file_operations acpi_processor_throttling_fops;
329 extern void acpi_processor_throttling_init(void);
330 /* in processor_idle.c */
331 int acpi_processor_power_init(struct acpi_processor *pr,
332                               struct acpi_device *device);
333 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
334 int acpi_processor_hotplug(struct acpi_processor *pr);
335 int acpi_processor_power_exit(struct acpi_processor *pr,
336                               struct acpi_device *device);
337 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
338 int acpi_processor_resume(struct acpi_device * device);
339 extern struct cpuidle_driver acpi_idle_driver;
340 
341 /* in processor_thermal.c */
342 int acpi_processor_get_limit_info(struct acpi_processor *pr);
343 extern const struct thermal_cooling_device_ops processor_cooling_ops;
344 #ifdef CONFIG_CPU_FREQ
345 void acpi_thermal_cpufreq_init(void);
346 void acpi_thermal_cpufreq_exit(void);
347 #else
348 static inline void acpi_thermal_cpufreq_init(void)
349 {
350         return;
351 }
352 static inline void acpi_thermal_cpufreq_exit(void)
353 {
354         return;
355 }
356 #endif
357 
358 #endif
359 

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