1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
6 #include <linux/cpuidle.h>
7 #include <linux/thermal.h>
10 #define ACPI_PROCESSOR_BUSY_METRIC 10
12 #define ACPI_PROCESSOR_MAX_POWER 8
13 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
14 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
16 #define ACPI_PROCESSOR_MAX_THROTTLING 16
17 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
18 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
20 #define ACPI_PDC_REVISION_ID 0x1
22 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
23 #define ACPI_PSD_REV0_ENTRIES 5
25 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26 #define ACPI_TSD_REV0_ENTRIES 5
28 * Types of coordination defined in ACPI 3.0. Same macros can be used across
31 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
32 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
33 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
35 #define ACPI_CSTATE_SYSTEMIO 0
36 #define ACPI_CSTATE_FFH 1
37 #define ACPI_CSTATE_HALT 2
39 #define ACPI_CX_DESC_LEN 32
41 /* Power Management */
43 struct acpi_processor_cx
;
45 struct acpi_power_register
{
53 } __attribute__ ((packed
));
55 struct acpi_processor_cx_policy
{
57 struct acpi_processor_cx
*state
;
66 struct acpi_processor_cx
{
78 struct acpi_processor_cx_policy promotion
;
79 struct acpi_processor_cx_policy demotion
;
80 char desc
[ACPI_CX_DESC_LEN
];
83 struct acpi_processor_power
{
84 struct cpuidle_device dev
;
85 struct acpi_processor_cx
*state
;
86 unsigned long bm_check_timestamp
;
89 struct acpi_processor_cx states
[ACPI_PROCESSOR_MAX_POWER
];
90 int timer_broadcast_on_state
;
93 /* Performance Management */
95 struct acpi_psd_package
{
101 } __attribute__ ((packed
));
103 struct acpi_pct_register
{
111 } __attribute__ ((packed
));
113 struct acpi_processor_px
{
114 u64 core_frequency
; /* megahertz */
115 u64 power
; /* milliWatts */
116 u64 transition_latency
; /* microseconds */
117 u64 bus_master_latency
; /* microseconds */
118 u64 control
; /* control value */
119 u64 status
; /* success indicator */
122 struct acpi_processor_performance
{
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_var_t shared_cpu_map
;
131 unsigned int shared_type
;
134 /* Throttling Control */
136 struct acpi_tsd_package
{
142 } __attribute__ ((packed
));
144 struct acpi_ptc_register
{
152 } __attribute__ ((packed
));
154 struct acpi_processor_tx_tss
{
155 u64 freqpercentage
; /* */
156 u64 power
; /* milliWatts */
157 u64 transition_latency
; /* microseconds */
158 u64 control
; /* control value */
159 u64 status
; /* success indicator */
161 struct acpi_processor_tx
{
166 struct acpi_processor
;
167 struct acpi_processor_throttling
{
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_var_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
, bool force
);
184 unsigned int shared_type
;
185 struct acpi_processor_tx states
[ACPI_PROCESSOR_MAX_THROTTLING
];
188 /* Limit Interface */
190 struct acpi_processor_lx
{
191 int px
; /* performance state */
192 int tx
; /* throttle level */
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 */
201 struct acpi_processor_flags
{
209 u8 power_setup_done
:1;
213 struct acpi_processor
{
218 int performance_platform_limit
;
219 int throttling_platform_limit
;
220 /* 0 - states 0..n-th state available */
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
;
230 struct acpi_processor_errata
{
240 extern int acpi_processor_preregister_performance(struct
241 acpi_processor_performance
242 __percpu
*performance
);
244 extern int acpi_processor_register_performance(struct acpi_processor_performance
245 *performance
, unsigned int cpu
);
246 extern void acpi_processor_unregister_performance(struct
247 acpi_processor_performance
251 /* note: this locks both the calling module and the processor module
252 if a _PPC object exists, rmmod is disallowed then */
253 int acpi_processor_notify_smm(struct module
*calling_module
);
255 /* for communication between multiple parts of the processor kernel module */
256 DECLARE_PER_CPU(struct acpi_processor
*, processors
);
257 extern struct acpi_processor_errata errata
;
259 #ifdef ARCH_HAS_POWER_INIT
260 void acpi_processor_power_init_bm_check(struct acpi_processor_flags
*flags
,
262 int acpi_processor_ffh_cstate_probe(unsigned int cpu
,
263 struct acpi_processor_cx
*cx
,
264 struct acpi_power_register
*reg
);
265 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
*cstate
);
267 static inline void acpi_processor_power_init_bm_check(struct
269 *flags
, unsigned int cpu
)
274 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu
,
275 struct acpi_processor_cx
*cx
,
276 struct acpi_power_register
281 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
288 /* in processor_perflib.c */
290 #ifdef CONFIG_CPU_FREQ
291 void acpi_processor_ppc_init(void);
292 void acpi_processor_ppc_exit(void);
293 int acpi_processor_ppc_has_changed(struct acpi_processor
*pr
, int event_flag
);
294 extern int acpi_processor_get_bios_limit(int cpu
, unsigned int *limit
);
296 static inline void acpi_processor_ppc_init(void)
300 static inline void acpi_processor_ppc_exit(void)
304 static inline int acpi_processor_ppc_has_changed(struct acpi_processor
*pr
,
307 static unsigned int printout
= 1;
310 "Warning: Processor Platform Limit event detected, but not handled.\n");
312 "Consider compiling CPUfreq support into your kernel.\n");
317 static inline int acpi_processor_get_bios_limit(int cpu
, unsigned int *limit
)
322 #endif /* CONFIG_CPU_FREQ */
324 /* in processor_core.c */
325 void acpi_processor_set_pdc(acpi_handle handle
);
327 int acpi_get_cpuid(acpi_handle
, int type
, u32 acpi_id
);
329 static inline int acpi_get_cpuid(acpi_handle handle
, int type
, u32 acpi_id
)
335 /* in processor_throttling.c */
336 int acpi_processor_tstate_has_changed(struct acpi_processor
*pr
);
337 int acpi_processor_get_throttling_info(struct acpi_processor
*pr
);
338 extern int acpi_processor_set_throttling(struct acpi_processor
*pr
,
339 int state
, bool force
);
340 extern const struct file_operations acpi_processor_throttling_fops
;
341 extern void acpi_processor_throttling_init(void);
342 /* in processor_idle.c */
343 int acpi_processor_power_init(struct acpi_processor
*pr
,
344 struct acpi_device
*device
);
345 int acpi_processor_cst_has_changed(struct acpi_processor
*pr
);
346 int acpi_processor_power_exit(struct acpi_processor
*pr
,
347 struct acpi_device
*device
);
348 int acpi_processor_suspend(struct acpi_device
* device
, pm_message_t state
);
349 int acpi_processor_resume(struct acpi_device
* device
);
350 extern struct cpuidle_driver acpi_idle_driver
;
352 /* in processor_thermal.c */
353 int acpi_processor_get_limit_info(struct acpi_processor
*pr
);
354 extern const struct file_operations acpi_processor_limit_fops
;
355 extern struct thermal_cooling_device_ops processor_cooling_ops
;
356 #ifdef CONFIG_CPU_FREQ
357 void acpi_thermal_cpufreq_init(void);
358 void acpi_thermal_cpufreq_exit(void);
360 static inline void acpi_thermal_cpufreq_init(void)
364 static inline void acpi_thermal_cpufreq_exit(void)