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
{
64 char desc
[ACPI_CX_DESC_LEN
];
67 struct acpi_processor_power
{
68 struct cpuidle_device dev
;
69 struct acpi_processor_cx
*state
;
70 unsigned long bm_check_timestamp
;
73 struct acpi_processor_cx states
[ACPI_PROCESSOR_MAX_POWER
];
74 int timer_broadcast_on_state
;
77 /* Performance Management */
79 struct acpi_psd_package
{
85 } __attribute__ ((packed
));
87 struct acpi_pct_register
{
95 } __attribute__ ((packed
));
97 struct acpi_processor_px
{
98 u64 core_frequency
; /* megahertz */
99 u64 power
; /* milliWatts */
100 u64 transition_latency
; /* microseconds */
101 u64 bus_master_latency
; /* microseconds */
102 u64 control
; /* control value */
103 u64 status
; /* success indicator */
106 struct acpi_processor_performance
{
108 unsigned int platform_limit
;
109 struct acpi_pct_register control_register
;
110 struct acpi_pct_register status_register
;
111 unsigned int state_count
;
112 struct acpi_processor_px
*states
;
113 struct acpi_psd_package domain_info
;
114 cpumask_var_t shared_cpu_map
;
115 unsigned int shared_type
;
118 /* Throttling Control */
120 struct acpi_tsd_package
{
126 } __attribute__ ((packed
));
128 struct acpi_ptc_register
{
136 } __attribute__ ((packed
));
138 struct acpi_processor_tx_tss
{
139 u64 freqpercentage
; /* */
140 u64 power
; /* milliWatts */
141 u64 transition_latency
; /* microseconds */
142 u64 control
; /* control value */
143 u64 status
; /* success indicator */
145 struct acpi_processor_tx
{
150 struct acpi_processor
;
151 struct acpi_processor_throttling
{
153 unsigned int platform_limit
;
154 struct acpi_pct_register control_register
;
155 struct acpi_pct_register status_register
;
156 unsigned int state_count
;
157 struct acpi_processor_tx_tss
*states_tss
;
158 struct acpi_tsd_package domain_info
;
159 cpumask_var_t shared_cpu_map
;
160 int (*acpi_processor_get_throttling
) (struct acpi_processor
* pr
);
161 int (*acpi_processor_set_throttling
) (struct acpi_processor
* pr
,
162 int state
, bool force
);
168 unsigned int shared_type
;
169 struct acpi_processor_tx states
[ACPI_PROCESSOR_MAX_THROTTLING
];
172 /* Limit Interface */
174 struct acpi_processor_lx
{
175 int px
; /* performance state */
176 int tx
; /* throttle level */
179 struct acpi_processor_limit
{
180 struct acpi_processor_lx state
; /* current limit */
181 struct acpi_processor_lx thermal
; /* thermal limit */
182 struct acpi_processor_lx user
; /* user limit */
185 struct acpi_processor_flags
{
193 u8 power_setup_done
:1;
195 u8 need_hotplug_init
:1;
198 struct acpi_processor
{
203 int performance_platform_limit
;
204 int throttling_platform_limit
;
205 /* 0 - states 0..n-th state available */
207 struct acpi_processor_flags flags
;
208 struct acpi_processor_power power
;
209 struct acpi_processor_performance
*performance
;
210 struct acpi_processor_throttling throttling
;
211 struct acpi_processor_limit limit
;
212 struct thermal_cooling_device
*cdev
;
215 struct acpi_processor_errata
{
225 extern void acpi_processor_load_module(struct acpi_processor
*pr
);
226 extern int acpi_processor_preregister_performance(struct
227 acpi_processor_performance
228 __percpu
*performance
);
230 extern int acpi_processor_register_performance(struct acpi_processor_performance
231 *performance
, unsigned int cpu
);
232 extern void acpi_processor_unregister_performance(struct
233 acpi_processor_performance
237 /* note: this locks both the calling module and the processor module
238 if a _PPC object exists, rmmod is disallowed then */
239 int acpi_processor_notify_smm(struct module
*calling_module
);
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
;
245 #ifdef ARCH_HAS_POWER_INIT
246 void acpi_processor_power_init_bm_check(struct acpi_processor_flags
*flags
,
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
);
253 static inline void acpi_processor_power_init_bm_check(struct
255 *flags
, unsigned int cpu
)
260 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu
,
261 struct acpi_processor_cx
*cx
,
262 struct acpi_power_register
267 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
274 /* in processor_perflib.c */
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
);
282 static inline void acpi_processor_ppc_init(void)
286 static inline void acpi_processor_ppc_exit(void)
290 static inline int acpi_processor_ppc_has_changed(struct acpi_processor
*pr
,
293 static unsigned int printout
= 1;
296 "Warning: Processor Platform Limit event detected, but not handled.\n");
298 "Consider compiling CPUfreq support into your kernel.\n");
303 static inline int acpi_processor_get_bios_limit(int cpu
, unsigned int *limit
)
308 #endif /* CONFIG_CPU_FREQ */
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
);
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
);
320 * Reevaluate whether the T-state is invalid after one cpu is
321 * onlined/offlined. In such case the flags.throttling will be updated.
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 struct acpi_device
*device
);
330 int acpi_processor_cst_has_changed(struct acpi_processor
*pr
);
331 int acpi_processor_hotplug(struct acpi_processor
*pr
);
332 int acpi_processor_power_exit(struct acpi_processor
*pr
,
333 struct acpi_device
*device
);
334 int acpi_processor_suspend(struct device
*dev
);
335 int acpi_processor_resume(struct device
*dev
);
336 extern struct cpuidle_driver acpi_idle_driver
;
338 /* in processor_thermal.c */
339 int acpi_processor_get_limit_info(struct acpi_processor
*pr
);
340 extern const struct thermal_cooling_device_ops processor_cooling_ops
;
341 #ifdef CONFIG_CPU_FREQ
342 void acpi_thermal_cpufreq_init(void);
343 void acpi_thermal_cpufreq_exit(void);
345 static inline void acpi_thermal_cpufreq_init(void)
349 static inline void acpi_thermal_cpufreq_exit(void)