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1da177e4 LT |
1 | #ifndef __ACPI_PROCESSOR_H |
2 | #define __ACPI_PROCESSOR_H | |
3 | ||
4 | #include <linux/kernel.h> | |
3b2d9942 | 5 | #include <linux/cpu.h> |
1da177e4 | 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 | ||
3b2d9942 VP |
21 | #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ |
22 | #define ACPI_PSD_REV0_ENTRIES 5 | |
23 | ||
24 | /* | |
25 | * Types of coordination defined in ACPI 3.0. Same macros can be used across | |
26 | * P, C and T states | |
27 | */ | |
28 | #define DOMAIN_COORD_TYPE_SW_ALL 0xfc | |
29 | #define DOMAIN_COORD_TYPE_SW_ANY 0xfd | |
30 | #define DOMAIN_COORD_TYPE_HW_ALL 0xfe | |
31 | ||
991528d7 VP |
32 | #define ACPI_CSTATE_SYSTEMIO (0) |
33 | #define ACPI_CSTATE_FFH (1) | |
34 | ||
1da177e4 LT |
35 | /* Power Management */ |
36 | ||
37 | struct acpi_processor_cx; | |
38 | ||
39 | struct acpi_power_register { | |
4be44fcd LB |
40 | u8 descriptor; |
41 | u16 length; | |
42 | u8 space_id; | |
43 | u8 bit_width; | |
44 | u8 bit_offset; | |
45 | u8 reserved; | |
46 | u64 address; | |
1da177e4 LT |
47 | } __attribute__ ((packed)); |
48 | ||
1da177e4 | 49 | struct acpi_processor_cx_policy { |
4be44fcd | 50 | u32 count; |
1da177e4 LT |
51 | struct acpi_processor_cx *state; |
52 | struct { | |
4be44fcd LB |
53 | u32 time; |
54 | u32 ticks; | |
55 | u32 count; | |
56 | u32 bm; | |
57 | } threshold; | |
1da177e4 LT |
58 | }; |
59 | ||
60 | struct acpi_processor_cx { | |
4be44fcd LB |
61 | u8 valid; |
62 | u8 type; | |
63 | u32 address; | |
991528d7 VP |
64 | u8 space_id; |
65 | u8 index; | |
4be44fcd LB |
66 | u32 latency; |
67 | u32 latency_ticks; | |
68 | u32 power; | |
69 | u32 usage; | |
a3c6598f | 70 | u64 time; |
1da177e4 LT |
71 | struct acpi_processor_cx_policy promotion; |
72 | struct acpi_processor_cx_policy demotion; | |
73 | }; | |
74 | ||
75 | struct acpi_processor_power { | |
76 | struct acpi_processor_cx *state; | |
4be44fcd LB |
77 | unsigned long bm_check_timestamp; |
78 | u32 default_state; | |
79 | u32 bm_activity; | |
80 | int count; | |
1da177e4 | 81 | struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; |
169a0abb | 82 | int timer_broadcast_on_state; |
1da177e4 LT |
83 | }; |
84 | ||
85 | /* Performance Management */ | |
86 | ||
3b2d9942 VP |
87 | struct acpi_psd_package { |
88 | acpi_integer num_entries; | |
89 | acpi_integer revision; | |
90 | acpi_integer domain; | |
91 | acpi_integer coord_type; | |
92 | acpi_integer num_processors; | |
93 | } __attribute__ ((packed)); | |
94 | ||
1da177e4 | 95 | struct acpi_pct_register { |
4be44fcd LB |
96 | u8 descriptor; |
97 | u16 length; | |
98 | u8 space_id; | |
99 | u8 bit_width; | |
100 | u8 bit_offset; | |
101 | u8 reserved; | |
102 | u64 address; | |
1da177e4 LT |
103 | } __attribute__ ((packed)); |
104 | ||
105 | struct acpi_processor_px { | |
4be44fcd LB |
106 | acpi_integer core_frequency; /* megahertz */ |
107 | acpi_integer power; /* milliWatts */ | |
108 | acpi_integer transition_latency; /* microseconds */ | |
109 | acpi_integer bus_master_latency; /* microseconds */ | |
110 | acpi_integer control; /* control value */ | |
111 | acpi_integer status; /* success indicator */ | |
1da177e4 LT |
112 | }; |
113 | ||
1da177e4 | 114 | struct acpi_processor_performance { |
4be44fcd LB |
115 | unsigned int state; |
116 | unsigned int platform_limit; | |
1da177e4 LT |
117 | struct acpi_pct_register control_register; |
118 | struct acpi_pct_register status_register; | |
4be44fcd | 119 | unsigned int state_count; |
1da177e4 | 120 | struct acpi_processor_px *states; |
3b2d9942 VP |
121 | struct acpi_psd_package domain_info; |
122 | cpumask_t shared_cpu_map; | |
123 | unsigned int shared_type; | |
1da177e4 LT |
124 | }; |
125 | ||
1da177e4 LT |
126 | /* Throttling Control */ |
127 | ||
128 | struct acpi_processor_tx { | |
4be44fcd LB |
129 | u16 power; |
130 | u16 performance; | |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct acpi_processor_throttling { | |
4be44fcd LB |
134 | int state; |
135 | u32 address; | |
136 | u8 duty_offset; | |
137 | u8 duty_width; | |
138 | int state_count; | |
1da177e4 LT |
139 | struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; |
140 | }; | |
141 | ||
142 | /* Limit Interface */ | |
143 | ||
144 | struct acpi_processor_lx { | |
4be44fcd LB |
145 | int px; /* performace state */ |
146 | int tx; /* throttle level */ | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_processor_limit { | |
4be44fcd | 150 | struct acpi_processor_lx state; /* current limit */ |
1da177e4 | 151 | struct acpi_processor_lx thermal; /* thermal limit */ |
4be44fcd | 152 | struct acpi_processor_lx user; /* user limit */ |
1da177e4 LT |
153 | }; |
154 | ||
1da177e4 | 155 | struct acpi_processor_flags { |
4be44fcd LB |
156 | u8 power:1; |
157 | u8 performance:1; | |
158 | u8 throttling:1; | |
159 | u8 limit:1; | |
160 | u8 bm_control:1; | |
161 | u8 bm_check:1; | |
162 | u8 has_cst:1; | |
163 | u8 power_setup_done:1; | |
1da177e4 LT |
164 | }; |
165 | ||
166 | struct acpi_processor { | |
4be44fcd LB |
167 | acpi_handle handle; |
168 | u32 acpi_id; | |
169 | u32 id; | |
170 | u32 pblk; | |
171 | int performance_platform_limit; | |
1da177e4 LT |
172 | struct acpi_processor_flags flags; |
173 | struct acpi_processor_power power; | |
174 | struct acpi_processor_performance *performance; | |
175 | struct acpi_processor_throttling throttling; | |
176 | struct acpi_processor_limit limit; | |
05131ecc VP |
177 | |
178 | /* the _PDC objects for this processor, if any */ | |
179 | struct acpi_object_list *pdc; | |
1da177e4 LT |
180 | }; |
181 | ||
182 | struct acpi_processor_errata { | |
4be44fcd | 183 | u8 smp; |
1da177e4 | 184 | struct { |
4be44fcd LB |
185 | u8 throttle:1; |
186 | u8 fdma:1; | |
187 | u8 reserved:6; | |
188 | u32 bmisx; | |
189 | } piix4; | |
1da177e4 LT |
190 | }; |
191 | ||
3b2d9942 VP |
192 | extern int acpi_processor_preregister_performance( |
193 | struct acpi_processor_performance **performance); | |
194 | ||
4be44fcd LB |
195 | extern int acpi_processor_register_performance(struct acpi_processor_performance |
196 | *performance, unsigned int cpu); | |
197 | extern void acpi_processor_unregister_performance(struct | |
198 | acpi_processor_performance | |
199 | *performance, | |
200 | unsigned int cpu); | |
1da177e4 LT |
201 | |
202 | /* note: this locks both the calling module and the processor module | |
203 | if a _PPC object exists, rmmod is disallowed then */ | |
204 | int acpi_processor_notify_smm(struct module *calling_module); | |
205 | ||
1da177e4 | 206 | /* for communication between multiple parts of the processor kernel module */ |
4be44fcd | 207 | extern struct acpi_processor *processors[NR_CPUS]; |
1da177e4 LT |
208 | extern struct acpi_processor_errata errata; |
209 | ||
05131ecc | 210 | void arch_acpi_processor_init_pdc(struct acpi_processor *pr); |
02df8b93 | 211 | |
05131ecc | 212 | #ifdef ARCH_HAS_POWER_INIT |
02df8b93 | 213 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
4be44fcd | 214 | unsigned int cpu); |
991528d7 VP |
215 | int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
216 | struct acpi_processor_cx *cx, struct acpi_power_register *reg); | |
217 | void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); | |
02df8b93 | 218 | #else |
4be44fcd LB |
219 | static inline void acpi_processor_power_init_bm_check(struct |
220 | acpi_processor_flags | |
221 | *flags, unsigned int cpu) | |
02df8b93 VP |
222 | { |
223 | flags->bm_check = 1; | |
224 | return; | |
225 | } | |
991528d7 VP |
226 | static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, |
227 | struct acpi_processor_cx *cx, struct acpi_power_register *reg) | |
228 | { | |
229 | return -1; | |
230 | } | |
231 | static inline void acpi_processor_ffh_cstate_enter( | |
232 | struct acpi_processor_cx *cstate) | |
233 | { | |
234 | return; | |
235 | } | |
02df8b93 VP |
236 | #endif |
237 | ||
1da177e4 | 238 | /* in processor_perflib.c */ |
02df8b93 | 239 | |
1da177e4 LT |
240 | #ifdef CONFIG_CPU_FREQ |
241 | void acpi_processor_ppc_init(void); | |
242 | void acpi_processor_ppc_exit(void); | |
243 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr); | |
244 | #else | |
4be44fcd LB |
245 | static inline void acpi_processor_ppc_init(void) |
246 | { | |
247 | return; | |
248 | } | |
249 | static inline void acpi_processor_ppc_exit(void) | |
250 | { | |
251 | return; | |
252 | } | |
253 | static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) | |
254 | { | |
1da177e4 LT |
255 | static unsigned int printout = 1; |
256 | if (printout) { | |
4be44fcd LB |
257 | printk(KERN_WARNING |
258 | "Warning: Processor Platform Limit event detected, but not handled.\n"); | |
259 | printk(KERN_WARNING | |
260 | "Consider compiling CPUfreq support into your kernel.\n"); | |
1da177e4 LT |
261 | printout = 0; |
262 | } | |
263 | return 0; | |
264 | } | |
4be44fcd | 265 | #endif /* CONFIG_CPU_FREQ */ |
1da177e4 LT |
266 | |
267 | /* in processor_throttling.c */ | |
4be44fcd LB |
268 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
269 | int acpi_processor_set_throttling(struct acpi_processor *pr, int state); | |
1da177e4 LT |
270 | extern struct file_operations acpi_processor_throttling_fops; |
271 | ||
272 | /* in processor_idle.c */ | |
4be44fcd LB |
273 | int acpi_processor_power_init(struct acpi_processor *pr, |
274 | struct acpi_device *device); | |
275 | int acpi_processor_cst_has_changed(struct acpi_processor *pr); | |
276 | int acpi_processor_power_exit(struct acpi_processor *pr, | |
277 | struct acpi_device *device); | |
1da177e4 LT |
278 | |
279 | /* in processor_thermal.c */ | |
4be44fcd | 280 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
1da177e4 LT |
281 | extern struct file_operations acpi_processor_limit_fops; |
282 | ||
283 | #ifdef CONFIG_CPU_FREQ | |
284 | void acpi_thermal_cpufreq_init(void); | |
285 | void acpi_thermal_cpufreq_exit(void); | |
286 | #else | |
4be44fcd LB |
287 | static inline void acpi_thermal_cpufreq_init(void) |
288 | { | |
289 | return; | |
290 | } | |
291 | static inline void acpi_thermal_cpufreq_exit(void) | |
292 | { | |
293 | return; | |
294 | } | |
1da177e4 LT |
295 | #endif |
296 | ||
1da177e4 | 297 | #endif |