projects/linux·blob uaccess-cleanups · refs

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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ACPI_PROCESSOR_H
3#define __ACPI_PROCESSOR_H
4
5#include <linux/cpu.h>
6#include <linux/cpufreq.h>
7#include <linux/pm_qos.h>
8#include <linux/printk.h>
9#include <linux/sched.h>
10#include <linux/smp.h>
11#include <linux/thermal.h>
12#include <linux/types.h>
13#include <linux/workqueue.h>
14
15#include <asm/acpi.h>
16
17#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
18#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010"
19
20#define ACPI_PROCESSOR_BUSY_METRIC 10
21
22#define ACPI_PROCESSOR_MAX_POWER 8
23#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
24#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
25
26#define ACPI_PROCESSOR_MAX_THROTTLING 16
27#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
28#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
29
30#define ACPI_PDC_REVISION_ID 0x1
31
32#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
33#define ACPI_PSD_REV0_ENTRIES 5
34
35#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
36#define ACPI_TSD_REV0_ENTRIES 5
37/*
38 * Types of coordination defined in ACPI 3.0. Same macros can be used across
39 * P, C and T states
40 */
41#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
42#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
43#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
44
45#define ACPI_CSTATE_SYSTEMIO 0
46#define ACPI_CSTATE_FFH 1
47#define ACPI_CSTATE_HALT 2
48#define ACPI_CSTATE_INTEGER 3
49
50#define ACPI_CX_DESC_LEN 32
51
52/* Power Management */
53
54struct acpi_processor_cx;
55
56struct acpi_power_register {
57 u8 descriptor;
58 u16 length;
59 u8 space_id;
60 u8 bit_width;
61 u8 bit_offset;
62 u8 access_size;
63 u64 address;
64} __packed;
65
66struct acpi_processor_cx {
67 u8 valid;
68 u8 type;
69 u32 address;
70 u8 entry_method;
71 u8 index;
72 u32 latency;
73 u8 bm_sts_skip;
74 char desc[ACPI_CX_DESC_LEN];
75};
76
77struct acpi_lpi_state {
78 u32 min_residency;
79 u32 wake_latency; /* worst case */
80 u32 flags;
81 u32 arch_flags;
82 u32 res_cnt_freq;
83 u32 enable_parent_state;
84 u64 address;
85 u8 index;
86 u8 entry_method;
87 char desc[ACPI_CX_DESC_LEN];
88};
89
90struct acpi_processor_power {
91 int count;
92 union {
93 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
94 struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER];
95 };
96 int timer_broadcast_on_state;
97};
98
99/* Performance Management */
100
101struct acpi_psd_package {
102 u64 num_entries;
103 u64 revision;
104 u64 domain;
105 u64 coord_type;
106 u64 num_processors;
107} __packed;
108
109struct acpi_pct_register {
110 u8 descriptor;
111 u16 length;
112 u8 space_id;
113 u8 bit_width;
114 u8 bit_offset;
115 u8 reserved;
116 u64 address;
117} __packed;
118
119struct acpi_processor_px {
120 u64 core_frequency; /* megahertz */
121 u64 power; /* milliWatts */
122 u64 transition_latency; /* microseconds */
123 u64 bus_master_latency; /* microseconds */
124 u64 control; /* control value */
125 u64 status; /* success indicator */
126};
127
128struct acpi_processor_performance {
129 unsigned int state;
130 unsigned int platform_limit;
131 struct acpi_pct_register control_register;
132 struct acpi_pct_register status_register;
133 unsigned int state_count;
134 struct acpi_processor_px *states;
135 struct acpi_psd_package domain_info;
136 cpumask_var_t shared_cpu_map;
137 unsigned int shared_type;
138};
139
140/* Throttling Control */
141
142struct acpi_tsd_package {
143 u64 num_entries;
144 u64 revision;
145 u64 domain;
146 u64 coord_type;
147 u64 num_processors;
148} __packed;
149
150struct acpi_ptc_register {
151 u8 descriptor;
152 u16 length;
153 u8 space_id;
154 u8 bit_width;
155 u8 bit_offset;
156 u8 reserved;
157 u64 address;
158} __packed;
159
160struct acpi_processor_tx_tss {
161 u64 freqpercentage; /* */
162 u64 power; /* milliWatts */
163 u64 transition_latency; /* microseconds */
164 u64 control; /* control value */
165 u64 status; /* success indicator */
166};
167struct acpi_processor_tx {
168 u16 power;
169 u16 performance;
170};
171
172struct acpi_processor;
173struct acpi_processor_throttling {
174 unsigned int state;
175 unsigned int platform_limit;
176 struct acpi_pct_register control_register;
177 struct acpi_pct_register status_register;
178 unsigned int state_count;
179 struct acpi_processor_tx_tss *states_tss;
180 struct acpi_tsd_package domain_info;
181 cpumask_var_t shared_cpu_map;
182 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
183 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
184 int state, bool force);
185
186 u32 address;
187 u8 duty_offset;
188 u8 duty_width;
189 u8 tsd_valid_flag;
190 unsigned int shared_type;
191 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
192};
193
194/* Limit Interface */
195
196struct acpi_processor_lx {
197 int px; /* performance state */
198 int tx; /* throttle level */
199};
200
201struct acpi_processor_limit {
202 struct acpi_processor_lx state; /* current limit */
203 struct acpi_processor_lx thermal; /* thermal limit */
204 struct acpi_processor_lx user; /* user limit */
205};
206
207struct acpi_processor_flags {
208 u8 power:1;
209 u8 performance:1;
210 u8 throttling:1;
211 u8 limit:1;
212 u8 bm_control:1;
213 u8 bm_check:1;
214 u8 has_cst:1;
215 u8 has_lpi:1;
216 u8 power_setup_done:1;
217 u8 bm_rld_set:1;
218 u8 previously_online:1;
219};
220
221struct acpi_processor {
222 acpi_handle handle;
223 u32 acpi_id;
224 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */
225 u32 id; /* CPU logical ID allocated by OS */
226 u32 pblk;
227 int performance_platform_limit;
228 int throttling_platform_limit;
229 /* 0 - states 0..n-th state available */
230
231 struct acpi_processor_flags flags;
232 struct acpi_processor_power power;
233 struct acpi_processor_performance *performance;
234 struct acpi_processor_throttling throttling;
235 struct acpi_processor_limit limit;
236 struct thermal_cooling_device *cdev;
237 struct device *dev; /* Processor device. */
238 struct freq_qos_request perflib_req;
239 struct freq_qos_request thermal_req;
240};
241
242struct acpi_processor_errata {
243 u8 smp;
244 struct {
245 u8 throttle:1;
246 u8 fdma:1;
247 u8 reserved:6;
248 u32 bmisx;
249 } piix4;
250};
251
252extern int acpi_processor_preregister_performance(struct
253 acpi_processor_performance
254 __percpu *performance);
255
256extern int acpi_processor_register_performance(struct acpi_processor_performance
257 *performance, unsigned int cpu);
258extern void acpi_processor_unregister_performance(unsigned int cpu);
259
260int acpi_processor_pstate_control(void);
261/* note: this locks both the calling module and the processor module
262 if a _PPC object exists, rmmod is disallowed then */
263int acpi_processor_notify_smm(struct module *calling_module);
264int acpi_processor_get_psd(acpi_handle handle,
265 struct acpi_psd_package *pdomain);
266
267/* parsing the _P* objects. */
268extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
269
270/* for communication between multiple parts of the processor kernel module */
271DECLARE_PER_CPU(struct acpi_processor *, processors);
272extern struct acpi_processor_errata errata;
273
274#if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE)
275void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
276 unsigned int cpu);
277int acpi_processor_ffh_cstate_probe(unsigned int cpu,
278 struct acpi_processor_cx *cx,
279 struct acpi_power_register *reg);
280void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
281void __noreturn acpi_processor_ffh_play_dead(struct acpi_processor_cx *cx);
282#else
283static inline void acpi_processor_power_init_bm_check(struct
284 acpi_processor_flags
285 *flags, unsigned int cpu)
286{
287 flags->bm_check = 1;
288 return;
289}
290static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
291 struct acpi_processor_cx *cx,
292 struct acpi_power_register
293 *reg)
294{
295 return -1;
296}
297static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
298 *cstate)
299{
300 return;
301}
302static inline void __noreturn acpi_processor_ffh_play_dead(struct acpi_processor_cx *cx)
303{
304 BUG();
305}
306#endif
307
308static inline int call_on_cpu(int cpu, long (*fn)(void *), void *arg,
309 bool direct)
310{
311 if (direct || (is_percpu_thread() && cpu == smp_processor_id()))
312 return fn(arg);
313 return work_on_cpu(cpu, fn, arg);
314}
315
316/* in processor_perflib.c */
317
318#ifdef CONFIG_CPU_FREQ
319extern bool acpi_processor_cpufreq_init;
320void acpi_processor_ignore_ppc_init(void);
321void acpi_processor_ppc_init(struct cpufreq_policy *policy);
322void acpi_processor_ppc_exit(struct cpufreq_policy *policy);
323void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
324extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
325#else
326static inline void acpi_processor_ignore_ppc_init(void)
327{
328 return;
329}
330static inline void acpi_processor_ppc_init(struct cpufreq_policy *policy)
331{
332 return;
333}
334static inline void acpi_processor_ppc_exit(struct cpufreq_policy *policy)
335{
336 return;
337}
338static inline void acpi_processor_ppc_has_changed(struct acpi_processor *pr,
339 int event_flag)
340{
341 static unsigned int printout = 1;
342 if (printout) {
343 printk(KERN_WARNING
344 "Warning: Processor Platform Limit event detected, but not handled.\n");
345 printk(KERN_WARNING
346 "Consider compiling CPUfreq support into your kernel.\n");
347 printout = 0;
348 }
349}
350static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
351{
352 return -ENODEV;
353}
354
355#endif /* CONFIG_CPU_FREQ */
356
357/* in processor_core.c */
358phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
359phys_cpuid_t acpi_map_madt_entry(u32 acpi_id);
360int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
361int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
362
363#ifdef CONFIG_ACPI_CPPC_LIB
364extern int acpi_cppc_processor_probe(struct acpi_processor *pr);
365extern void acpi_cppc_processor_exit(struct acpi_processor *pr);
366#else
367static inline int acpi_cppc_processor_probe(struct acpi_processor *pr)
368{
369 return 0;
370}
371static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
372{
373 return;
374}
375#endif /* CONFIG_ACPI_CPPC_LIB */
376
377/* in processor_pdc.c */
378void acpi_processor_set_pdc(acpi_handle handle);
379
380/* in processor_throttling.c */
381#ifdef CONFIG_ACPI_CPU_FREQ_PSS
382int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
383int acpi_processor_get_throttling_info(struct acpi_processor *pr);
384extern int acpi_processor_set_throttling(struct acpi_processor *pr,
385 int state, bool force);
386/*
387 * Reevaluate whether the T-state is invalid after one cpu is
388 * onlined/offlined. In such case the flags.throttling will be updated.
389 */
390extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
391 bool is_dead);
392extern const struct file_operations acpi_processor_throttling_fops;
393extern void acpi_processor_throttling_init(void);
394#else
395static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
396{
397 return 0;
398}
399
400static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr)
401{
402 return -ENODEV;
403}
404
405static inline int acpi_processor_set_throttling(struct acpi_processor *pr,
406 int state, bool force)
407{
408 return -ENODEV;
409}
410
411static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
412 bool is_dead) {}
413
414static inline void acpi_processor_throttling_init(void) {}
415#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
416
417/* in processor_idle.c */
418#ifdef CONFIG_ACPI_PROCESSOR_IDLE
419void acpi_processor_power_init(struct acpi_processor *pr);
420void acpi_processor_power_exit(struct acpi_processor *pr);
421int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
422int acpi_processor_hotplug(struct acpi_processor *pr);
423void acpi_processor_register_idle_driver(void);
424void acpi_processor_unregister_idle_driver(void);
425int acpi_processor_ffh_lpi_probe(unsigned int cpu);
426int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi);
427#endif /* CONFIG_ACPI_PROCESSOR_IDLE */
428
429/* in processor_thermal.c */
430int acpi_processor_thermal_init(struct acpi_processor *pr,
431 struct acpi_device *device);
432void acpi_processor_thermal_exit(struct acpi_processor *pr,
433 struct acpi_device *device);
434extern const struct thermal_cooling_device_ops processor_cooling_ops;
435#ifdef CONFIG_CPU_FREQ
436void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy);
437void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy);
438#else
439static inline void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
440{
441 return;
442}
443static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
444{
445 return;
446}
447#endif /* CONFIG_CPU_FREQ */
448
449void acpi_processor_init_invariance_cppc(void);
450
451#endif