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1da177e4 LT |
1 | #ifndef __ACPI_PROCESSOR_H |
2 | #define __ACPI_PROCESSOR_H | |
3 | ||
4 | #include <linux/kernel.h> | |
5 | #include <linux/config.h> | |
6 | ||
02df8b93 VP |
7 | #include <asm/acpi.h> |
8 | ||
1da177e4 LT |
9 | #define ACPI_PROCESSOR_BUSY_METRIC 10 |
10 | ||
11 | #define ACPI_PROCESSOR_MAX_POWER 8 | |
12 | #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 | |
13 | #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 | |
14 | ||
15 | #define ACPI_PROCESSOR_MAX_THROTTLING 16 | |
16 | #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ | |
17 | #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 | |
18 | ||
02df8b93 VP |
19 | #define ACPI_PDC_REVISION_ID 0x1 |
20 | ||
1da177e4 LT |
21 | /* Power Management */ |
22 | ||
23 | struct acpi_processor_cx; | |
24 | ||
25 | struct acpi_power_register { | |
4be44fcd LB |
26 | u8 descriptor; |
27 | u16 length; | |
28 | u8 space_id; | |
29 | u8 bit_width; | |
30 | u8 bit_offset; | |
31 | u8 reserved; | |
32 | u64 address; | |
1da177e4 LT |
33 | } __attribute__ ((packed)); |
34 | ||
1da177e4 | 35 | struct acpi_processor_cx_policy { |
4be44fcd | 36 | u32 count; |
1da177e4 LT |
37 | struct acpi_processor_cx *state; |
38 | struct { | |
4be44fcd LB |
39 | u32 time; |
40 | u32 ticks; | |
41 | u32 count; | |
42 | u32 bm; | |
43 | } threshold; | |
1da177e4 LT |
44 | }; |
45 | ||
46 | struct acpi_processor_cx { | |
4be44fcd LB |
47 | u8 valid; |
48 | u8 type; | |
49 | u32 address; | |
50 | u32 latency; | |
51 | u32 latency_ticks; | |
52 | u32 power; | |
53 | u32 usage; | |
1da177e4 LT |
54 | struct acpi_processor_cx_policy promotion; |
55 | struct acpi_processor_cx_policy demotion; | |
56 | }; | |
57 | ||
58 | struct acpi_processor_power { | |
59 | struct acpi_processor_cx *state; | |
4be44fcd LB |
60 | unsigned long bm_check_timestamp; |
61 | u32 default_state; | |
62 | u32 bm_activity; | |
63 | int count; | |
1da177e4 | 64 | struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; |
02df8b93 VP |
65 | |
66 | /* the _PDC objects passed by the driver, if any */ | |
67 | struct acpi_object_list *pdc; | |
1da177e4 LT |
68 | }; |
69 | ||
70 | /* Performance Management */ | |
71 | ||
72 | struct acpi_pct_register { | |
4be44fcd LB |
73 | u8 descriptor; |
74 | u16 length; | |
75 | u8 space_id; | |
76 | u8 bit_width; | |
77 | u8 bit_offset; | |
78 | u8 reserved; | |
79 | u64 address; | |
1da177e4 LT |
80 | } __attribute__ ((packed)); |
81 | ||
82 | struct acpi_processor_px { | |
4be44fcd LB |
83 | acpi_integer core_frequency; /* megahertz */ |
84 | acpi_integer power; /* milliWatts */ | |
85 | acpi_integer transition_latency; /* microseconds */ | |
86 | acpi_integer bus_master_latency; /* microseconds */ | |
87 | acpi_integer control; /* control value */ | |
88 | acpi_integer status; /* success indicator */ | |
1da177e4 LT |
89 | }; |
90 | ||
1da177e4 | 91 | struct acpi_processor_performance { |
4be44fcd LB |
92 | unsigned int state; |
93 | unsigned int platform_limit; | |
1da177e4 LT |
94 | struct acpi_pct_register control_register; |
95 | struct acpi_pct_register status_register; | |
4be44fcd | 96 | unsigned int state_count; |
1da177e4 LT |
97 | struct acpi_processor_px *states; |
98 | ||
99 | /* the _PDC objects passed by the driver, if any */ | |
100 | struct acpi_object_list *pdc; | |
101 | }; | |
102 | ||
1da177e4 LT |
103 | /* Throttling Control */ |
104 | ||
105 | struct acpi_processor_tx { | |
4be44fcd LB |
106 | u16 power; |
107 | u16 performance; | |
1da177e4 LT |
108 | }; |
109 | ||
110 | struct acpi_processor_throttling { | |
4be44fcd LB |
111 | int state; |
112 | u32 address; | |
113 | u8 duty_offset; | |
114 | u8 duty_width; | |
115 | int state_count; | |
1da177e4 LT |
116 | struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; |
117 | }; | |
118 | ||
119 | /* Limit Interface */ | |
120 | ||
121 | struct acpi_processor_lx { | |
4be44fcd LB |
122 | int px; /* performace state */ |
123 | int tx; /* throttle level */ | |
1da177e4 LT |
124 | }; |
125 | ||
126 | struct acpi_processor_limit { | |
4be44fcd | 127 | struct acpi_processor_lx state; /* current limit */ |
1da177e4 | 128 | struct acpi_processor_lx thermal; /* thermal limit */ |
4be44fcd | 129 | struct acpi_processor_lx user; /* user limit */ |
1da177e4 LT |
130 | }; |
131 | ||
1da177e4 | 132 | struct acpi_processor_flags { |
4be44fcd LB |
133 | u8 power:1; |
134 | u8 performance:1; | |
135 | u8 throttling:1; | |
136 | u8 limit:1; | |
137 | u8 bm_control:1; | |
138 | u8 bm_check:1; | |
139 | u8 has_cst:1; | |
140 | u8 power_setup_done:1; | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_processor { | |
4be44fcd LB |
144 | acpi_handle handle; |
145 | u32 acpi_id; | |
146 | u32 id; | |
147 | u32 pblk; | |
148 | int performance_platform_limit; | |
1da177e4 LT |
149 | struct acpi_processor_flags flags; |
150 | struct acpi_processor_power power; | |
151 | struct acpi_processor_performance *performance; | |
152 | struct acpi_processor_throttling throttling; | |
153 | struct acpi_processor_limit limit; | |
154 | }; | |
155 | ||
156 | struct acpi_processor_errata { | |
4be44fcd | 157 | u8 smp; |
1da177e4 | 158 | struct { |
4be44fcd LB |
159 | u8 throttle:1; |
160 | u8 fdma:1; | |
161 | u8 reserved:6; | |
162 | u32 bmisx; | |
163 | } piix4; | |
1da177e4 LT |
164 | }; |
165 | ||
4be44fcd LB |
166 | extern int acpi_processor_register_performance(struct acpi_processor_performance |
167 | *performance, unsigned int cpu); | |
168 | extern void acpi_processor_unregister_performance(struct | |
169 | acpi_processor_performance | |
170 | *performance, | |
171 | unsigned int cpu); | |
1da177e4 LT |
172 | |
173 | /* note: this locks both the calling module and the processor module | |
174 | if a _PPC object exists, rmmod is disallowed then */ | |
175 | int acpi_processor_notify_smm(struct module *calling_module); | |
176 | ||
1da177e4 | 177 | /* for communication between multiple parts of the processor kernel module */ |
4be44fcd | 178 | extern struct acpi_processor *processors[NR_CPUS]; |
1da177e4 LT |
179 | extern struct acpi_processor_errata errata; |
180 | ||
02df8b93 | 181 | int acpi_processor_set_pdc(struct acpi_processor *pr, |
4be44fcd | 182 | struct acpi_object_list *pdc_in); |
02df8b93 VP |
183 | |
184 | #ifdef ARCH_HAS_POWER_PDC_INIT | |
185 | void acpi_processor_power_init_pdc(struct acpi_processor_power *pow, | |
4be44fcd | 186 | unsigned int cpu); |
02df8b93 | 187 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
4be44fcd | 188 | unsigned int cpu); |
02df8b93 | 189 | #else |
4be44fcd LB |
190 | static inline void acpi_processor_power_init_pdc(struct acpi_processor_power |
191 | *pow, unsigned int cpu) | |
02df8b93 VP |
192 | { |
193 | pow->pdc = NULL; | |
194 | return; | |
195 | } | |
196 | ||
4be44fcd LB |
197 | static inline void acpi_processor_power_init_bm_check(struct |
198 | acpi_processor_flags | |
199 | *flags, unsigned int cpu) | |
02df8b93 VP |
200 | { |
201 | flags->bm_check = 1; | |
202 | return; | |
203 | } | |
204 | #endif | |
205 | ||
1da177e4 | 206 | /* in processor_perflib.c */ |
02df8b93 | 207 | |
1da177e4 LT |
208 | #ifdef CONFIG_CPU_FREQ |
209 | void acpi_processor_ppc_init(void); | |
210 | void acpi_processor_ppc_exit(void); | |
211 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr); | |
212 | #else | |
4be44fcd LB |
213 | static inline void acpi_processor_ppc_init(void) |
214 | { | |
215 | return; | |
216 | } | |
217 | static inline void acpi_processor_ppc_exit(void) | |
218 | { | |
219 | return; | |
220 | } | |
221 | static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) | |
222 | { | |
1da177e4 LT |
223 | static unsigned int printout = 1; |
224 | if (printout) { | |
4be44fcd LB |
225 | printk(KERN_WARNING |
226 | "Warning: Processor Platform Limit event detected, but not handled.\n"); | |
227 | printk(KERN_WARNING | |
228 | "Consider compiling CPUfreq support into your kernel.\n"); | |
1da177e4 LT |
229 | printout = 0; |
230 | } | |
231 | return 0; | |
232 | } | |
4be44fcd | 233 | #endif /* CONFIG_CPU_FREQ */ |
1da177e4 LT |
234 | |
235 | /* in processor_throttling.c */ | |
4be44fcd LB |
236 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
237 | int acpi_processor_set_throttling(struct acpi_processor *pr, int state); | |
238 | ssize_t acpi_processor_write_throttling(struct file *file, | |
239 | const char __user * buffer, | |
240 | size_t count, loff_t * data); | |
1da177e4 LT |
241 | extern struct file_operations acpi_processor_throttling_fops; |
242 | ||
243 | /* in processor_idle.c */ | |
4be44fcd LB |
244 | int acpi_processor_power_init(struct acpi_processor *pr, |
245 | struct acpi_device *device); | |
246 | int acpi_processor_cst_has_changed(struct acpi_processor *pr); | |
247 | int acpi_processor_power_exit(struct acpi_processor *pr, | |
248 | struct acpi_device *device); | |
1da177e4 LT |
249 | |
250 | /* in processor_thermal.c */ | |
4be44fcd LB |
251 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
252 | ssize_t acpi_processor_write_limit(struct file *file, | |
253 | const char __user * buffer, | |
254 | size_t count, loff_t * data); | |
1da177e4 LT |
255 | extern struct file_operations acpi_processor_limit_fops; |
256 | ||
257 | #ifdef CONFIG_CPU_FREQ | |
258 | void acpi_thermal_cpufreq_init(void); | |
259 | void acpi_thermal_cpufreq_exit(void); | |
260 | #else | |
4be44fcd LB |
261 | static inline void acpi_thermal_cpufreq_init(void) |
262 | { | |
263 | return; | |
264 | } | |
265 | static inline void acpi_thermal_cpufreq_exit(void) | |
266 | { | |
267 | return; | |
268 | } | |
1da177e4 LT |
269 | #endif |
270 | ||
1da177e4 | 271 | #endif |