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6fa3eb70 S |
1 | /* |
2 | * drivers/cpufreq/cpufreq_hotplug.c | |
3 | * | |
4 | * Copyright (C) 2001 Russell King | |
5 | * (C) 2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>. | |
6 | * Jun Nakajima <jun.nakajima@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
14 | ||
15 | #include <linux/cpufreq.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/kernel_stat.h> | |
19 | #include <linux/kobject.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/percpu-defs.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/sysfs.h> | |
25 | #include <linux/tick.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/cpu.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/sched/rt.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/input.h> /* <-XXX */ | |
32 | #include <linux/slab.h> /* <-XXX */ | |
33 | #include "mach/mt_cpufreq.h" /* <-XXX */ | |
34 | ||
35 | #include "cpufreq_governor.h" | |
36 | ||
37 | /* Hot-plug governor macros */ | |
38 | #define DEF_FREQUENCY_DOWN_DIFFERENTIAL (10) | |
39 | #define DEF_FREQUENCY_UP_THRESHOLD (80) | |
40 | #define DEF_SAMPLING_DOWN_FACTOR (1) | |
41 | #define MAX_SAMPLING_DOWN_FACTOR (100000) | |
42 | #define MICRO_FREQUENCY_DOWN_DIFFERENTIAL (15) | |
43 | #define MIN_FREQUENCY_DOWN_DIFFERENTIAL (5) /* <-XXX */ | |
44 | #define MAX_FREQUENCY_DOWN_DIFFERENTIAL (20) /* <-XXX */ | |
45 | #define MICRO_FREQUENCY_UP_THRESHOLD (85) | |
46 | #ifdef CONFIG_MTK_SDIOAUTOK_SUPPORT | |
47 | #define MICRO_FREQUENCY_MIN_SAMPLE_RATE (27000) | |
48 | #else | |
49 | #define MICRO_FREQUENCY_MIN_SAMPLE_RATE (30000) | |
50 | #endif | |
51 | #define MIN_FREQUENCY_UP_THRESHOLD (21) | |
52 | #define MAX_FREQUENCY_UP_THRESHOLD (100) | |
53 | ||
54 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
55 | /* | |
56 | * cpu hotplug - macro | |
57 | */ | |
58 | #define DEF_CPU_DOWN_DIFFERENTIAL (10) | |
59 | #define MICRO_CPU_DOWN_DIFFERENTIAL (10) | |
60 | #define MIN_CPU_DOWN_DIFFERENTIAL (0) | |
61 | #define MAX_CPU_DOWN_DIFFERENTIAL (30) | |
62 | ||
63 | #define DEF_CPU_UP_THRESHOLD (90) | |
64 | #define MICRO_CPU_UP_THRESHOLD (90) | |
65 | #define MIN_CPU_UP_THRESHOLD (50) | |
66 | #define MAX_CPU_UP_THRESHOLD (100) | |
67 | ||
68 | #define DEF_CPU_UP_AVG_TIMES (10) | |
69 | #define MIN_CPU_UP_AVG_TIMES (1) | |
70 | #define MAX_CPU_UP_AVG_TIMES (20) | |
71 | ||
72 | #define DEF_CPU_DOWN_AVG_TIMES (100) | |
73 | #define MIN_CPU_DOWN_AVG_TIMES (20) | |
74 | #define MAX_CPU_DOWN_AVG_TIMES (200) | |
75 | ||
76 | #define DEF_CPU_INPUT_BOOST_ENABLE (1) | |
77 | #define DEF_CPU_INPUT_BOOST_NUM (2) | |
78 | ||
79 | #define DEF_CPU_RUSH_BOOST_ENABLE (1) | |
80 | ||
81 | #define DEF_CPU_RUSH_THRESHOLD (98) | |
82 | #define MICRO_CPU_RUSH_THRESHOLD (98) | |
83 | #define MIN_CPU_RUSH_THRESHOLD (80) | |
84 | #define MAX_CPU_RUSH_THRESHOLD (100) | |
85 | ||
86 | #define DEF_CPU_RUSH_AVG_TIMES (5) | |
87 | #define MIN_CPU_RUSH_AVG_TIMES (1) | |
88 | #define MAX_CPU_RUSH_AVG_TIMES (10) | |
89 | ||
90 | #define DEF_CPU_RUSH_TLP_TIMES (5) | |
91 | #define MIN_CPU_RUSH_TLP_TIMES (1) | |
92 | #define MAX_CPU_RUSH_TLP_TIMES (10) | |
93 | ||
94 | /* #define DEBUG_LOG */ | |
95 | ||
96 | /* | |
97 | * cpu hotplug - enum | |
98 | */ | |
99 | typedef enum { | |
100 | CPU_HOTPLUG_WORK_TYPE_NONE = 0, | |
101 | CPU_HOTPLUG_WORK_TYPE_BASE, | |
102 | CPU_HOTPLUG_WORK_TYPE_LIMIT, | |
103 | CPU_HOTPLUG_WORK_TYPE_UP, | |
104 | CPU_HOTPLUG_WORK_TYPE_DOWN, | |
105 | CPU_HOTPLUG_WORK_TYPE_RUSH, | |
106 | } cpu_hotplug_work_type_t; | |
107 | ||
108 | /* | |
109 | * cpu hotplug - global variable, function declaration | |
110 | */ | |
111 | static DEFINE_MUTEX(hp_mutex); | |
112 | DEFINE_MUTEX(hp_onoff_mutex); | |
113 | ||
114 | int g_cpus_sum_load_current = 0; /* set global for information purpose */ | |
115 | #ifdef CONFIG_HOTPLUG_CPU | |
116 | ||
117 | static long g_cpu_up_sum_load; | |
118 | static int g_cpu_up_count; | |
119 | static int g_cpu_up_load_index; | |
120 | static long g_cpu_up_load_history[MAX_CPU_UP_AVG_TIMES] = { 0 }; | |
121 | ||
122 | static long g_cpu_down_sum_load; | |
123 | static int g_cpu_down_count; | |
124 | static int g_cpu_down_load_index; | |
125 | static long g_cpu_down_load_history[MAX_CPU_DOWN_AVG_TIMES] = { 0 }; | |
126 | ||
127 | static cpu_hotplug_work_type_t g_trigger_hp_work; | |
128 | static unsigned int g_next_hp_action; | |
129 | static struct delayed_work hp_work; | |
130 | struct workqueue_struct *hp_wq = NULL; | |
131 | ||
132 | static int g_tlp_avg_current; /* set global for information purpose */ | |
133 | static int g_tlp_avg_sum; | |
134 | static int g_tlp_avg_count; | |
135 | static int g_tlp_avg_index; | |
136 | static int g_tlp_avg_average; /* set global for information purpose */ | |
137 | static int g_tlp_avg_history[MAX_CPU_RUSH_TLP_TIMES] = { 0 }; | |
138 | ||
139 | static int g_tlp_iowait_av; | |
140 | ||
141 | static int g_cpu_rush_count; | |
142 | ||
143 | static void hp_reset_strategy_nolock(void); | |
144 | static void hp_reset_strategy(void); | |
145 | ||
146 | #else /* #ifdef CONFIG_HOTPLUG_CPU */ | |
147 | ||
148 | static void hp_reset_strategy_nolock(void) | |
149 | { | |
150 | }; | |
151 | ||
152 | #endif /* #ifdef CONFIG_HOTPLUG_CPU */ | |
153 | ||
154 | /* dvfs - function declaration */ | |
155 | static void dbs_freq_increase(struct cpufreq_policy *p, unsigned int freq); | |
156 | ||
157 | #if defined(CONFIG_THERMAL_LIMIT_TEST) | |
158 | extern unsigned int mt_cpufreq_thermal_test_limited_load(void); | |
159 | #endif | |
160 | ||
161 | static unsigned int dbs_ignore = 1; | |
162 | static unsigned int dbs_thermal_limited; | |
163 | static unsigned int dbs_thermal_limited_freq; | |
164 | ||
165 | /* dvfs thermal limit */ | |
166 | void dbs_freq_thermal_limited(unsigned int limited, unsigned int freq) | |
167 | { | |
168 | dbs_thermal_limited = limited; | |
169 | dbs_thermal_limited_freq = freq; | |
170 | } | |
171 | EXPORT_SYMBOL(dbs_freq_thermal_limited); | |
172 | ||
173 | ||
174 | void (*cpufreq_freq_check) (enum mt_cpu_dvfs_id id) = NULL; | |
175 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
176 | ||
177 | static DEFINE_PER_CPU(struct hp_cpu_dbs_info_s, hp_cpu_dbs_info); | |
178 | ||
179 | static struct hp_ops hp_ops; | |
180 | ||
181 | #ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_HOTPLUG | |
182 | static struct cpufreq_governor cpufreq_gov_hotplug; | |
183 | #endif | |
184 | ||
185 | static unsigned int default_powersave_bias; | |
186 | ||
187 | static void hotplug_powersave_bias_init_cpu(int cpu) | |
188 | { | |
189 | struct hp_cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, cpu); | |
190 | ||
191 | dbs_info->freq_table = cpufreq_frequency_get_table(cpu); | |
192 | dbs_info->freq_lo = 0; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Not all CPUs want IO time to be accounted as busy; this depends on how | |
197 | * efficient idling at a higher frequency/voltage is. | |
198 | * Pavel Machek says this is not so for various generations of AMD and old | |
199 | * Intel systems. | |
200 | * Mike Chan (android.com) claims this is also not true for ARM. | |
201 | * Because of this, whitelist specific known (series) of CPUs by default, and | |
202 | * leave all others up to the user. | |
203 | */ | |
204 | static int should_io_be_busy(void) | |
205 | { | |
206 | #if defined(CONFIG_X86) | |
207 | /* | |
208 | * For Intel, Core 2 (model 15) and later have an efficient idle. | |
209 | */ | |
210 | if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && | |
211 | boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model >= 15) | |
212 | return 1; | |
213 | #endif | |
214 | return 1; /* io wait time should be subtracted from idle time // <-XXX */ | |
215 | } | |
216 | ||
217 | /* | |
218 | * Find right freq to be set now with powersave_bias on. | |
219 | * Returns the freq_hi to be used right now and will set freq_hi_jiffies, | |
220 | * freq_lo, and freq_lo_jiffies in percpu area for averaging freqs. | |
221 | */ | |
222 | static unsigned int generic_powersave_bias_target(struct cpufreq_policy *policy, | |
223 | unsigned int freq_next, unsigned int relation) | |
224 | { | |
225 | unsigned int freq_req, freq_reduc, freq_avg; | |
226 | unsigned int freq_hi, freq_lo; | |
227 | unsigned int index = 0; | |
228 | unsigned int jiffies_total, jiffies_hi, jiffies_lo; | |
229 | struct hp_cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, | |
230 | policy->cpu); | |
231 | struct dbs_data *dbs_data = policy->governor_data; | |
232 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
233 | ||
234 | if (!dbs_info->freq_table) { | |
235 | dbs_info->freq_lo = 0; | |
236 | dbs_info->freq_lo_jiffies = 0; | |
237 | return freq_next; | |
238 | } | |
239 | ||
240 | cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_next, relation, &index); | |
241 | freq_req = dbs_info->freq_table[index].frequency; | |
242 | freq_reduc = freq_req * hp_tuners->powersave_bias / 1000; | |
243 | freq_avg = freq_req - freq_reduc; | |
244 | ||
245 | /* Find freq bounds for freq_avg in freq_table */ | |
246 | index = 0; | |
247 | cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg, | |
248 | CPUFREQ_RELATION_H, &index); | |
249 | freq_lo = dbs_info->freq_table[index].frequency; | |
250 | index = 0; | |
251 | cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg, | |
252 | CPUFREQ_RELATION_L, &index); | |
253 | freq_hi = dbs_info->freq_table[index].frequency; | |
254 | ||
255 | /* Find out how long we have to be in hi and lo freqs */ | |
256 | if (freq_hi == freq_lo) { | |
257 | dbs_info->freq_lo = 0; | |
258 | dbs_info->freq_lo_jiffies = 0; | |
259 | return freq_lo; | |
260 | } | |
261 | jiffies_total = usecs_to_jiffies(hp_tuners->sampling_rate); | |
262 | jiffies_hi = (freq_avg - freq_lo) * jiffies_total; | |
263 | jiffies_hi += ((freq_hi - freq_lo) / 2); | |
264 | jiffies_hi /= (freq_hi - freq_lo); | |
265 | jiffies_lo = jiffies_total - jiffies_hi; | |
266 | dbs_info->freq_lo = freq_lo; | |
267 | dbs_info->freq_lo_jiffies = jiffies_lo; | |
268 | dbs_info->freq_hi_jiffies = jiffies_hi; | |
269 | return freq_hi; | |
270 | } | |
271 | ||
272 | static void hotplug_powersave_bias_init(void) | |
273 | { | |
274 | int i; | |
275 | for_each_online_cpu(i) { | |
276 | hotplug_powersave_bias_init_cpu(i); | |
277 | } | |
278 | } | |
279 | ||
280 | static void dbs_freq_increase(struct cpufreq_policy *p, unsigned int freq) | |
281 | { | |
282 | struct dbs_data *dbs_data = p->governor_data; | |
283 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
284 | ||
285 | if (hp_tuners->powersave_bias) | |
286 | freq = hp_ops.powersave_bias_target(p, freq, CPUFREQ_RELATION_H); | |
287 | else if (p->cur == p->max) { | |
288 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
289 | if (dbs_ignore == 0) { | |
290 | if ((dbs_thermal_limited == 1) && (freq > dbs_thermal_limited_freq)) { | |
291 | freq = dbs_thermal_limited_freq; | |
292 | pr_debug("[dbs_freq_increase] thermal limit freq = %d\n", freq); | |
293 | } | |
294 | ||
295 | dbs_ignore = 1; | |
296 | } else | |
297 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
298 | return; | |
299 | } | |
300 | ||
301 | __cpufreq_driver_target(p, freq, hp_tuners->powersave_bias ? | |
302 | CPUFREQ_RELATION_L : CPUFREQ_RELATION_H); | |
303 | } | |
304 | ||
305 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
306 | /* | |
307 | * cpu hotplug - function definition | |
308 | */ | |
309 | int hp_get_dynamic_cpu_hotplug_enable(void) | |
310 | { | |
311 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
312 | struct hp_dbs_tuners *hp_tuners; | |
313 | ||
314 | if (!dbs_data) | |
315 | return 0; | |
316 | hp_tuners = dbs_data->tuners; | |
317 | if (!hp_tuners) | |
318 | return 0; | |
319 | ||
320 | return !(hp_tuners->is_cpu_hotplug_disable); | |
321 | } | |
322 | EXPORT_SYMBOL(hp_get_dynamic_cpu_hotplug_enable); | |
323 | ||
324 | void hp_set_dynamic_cpu_hotplug_enable(int enable) | |
325 | { | |
326 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
327 | struct hp_dbs_tuners *hp_tuners; | |
328 | ||
329 | if (!dbs_data) | |
330 | return; | |
331 | hp_tuners = dbs_data->tuners; | |
332 | if (!hp_tuners) | |
333 | return; | |
334 | ||
335 | if (enable > 1 || enable < 0) | |
336 | return; | |
337 | ||
338 | mutex_lock(&hp_mutex); | |
339 | ||
340 | if (hp_tuners->is_cpu_hotplug_disable && enable) | |
341 | hp_reset_strategy_nolock(); | |
342 | ||
343 | hp_tuners->is_cpu_hotplug_disable = !enable; | |
344 | mutex_unlock(&hp_mutex); | |
345 | } | |
346 | EXPORT_SYMBOL(hp_set_dynamic_cpu_hotplug_enable); | |
347 | ||
348 | void hp_limited_cpu_num(int num) | |
349 | { | |
350 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
351 | struct hp_dbs_tuners *hp_tuners; | |
352 | ||
353 | if (!dbs_data) | |
354 | return; | |
355 | hp_tuners = dbs_data->tuners; | |
356 | if (!hp_tuners) | |
357 | return; | |
358 | ||
359 | if (num > num_possible_cpus() || num < 1) | |
360 | return; | |
361 | ||
362 | mutex_lock(&hp_mutex); | |
363 | hp_tuners->cpu_num_limit = num; | |
364 | mutex_unlock(&hp_mutex); | |
365 | } | |
366 | EXPORT_SYMBOL(hp_limited_cpu_num); | |
367 | ||
368 | void hp_based_cpu_num(int num) | |
369 | { | |
370 | unsigned int online_cpus_count; | |
371 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
372 | struct hp_dbs_tuners *hp_tuners; | |
373 | ||
374 | if (!dbs_data) | |
375 | return; | |
376 | hp_tuners = dbs_data->tuners; | |
377 | if (!hp_tuners) | |
378 | return; | |
379 | ||
380 | if (num > num_possible_cpus() || num < 1) | |
381 | return; | |
382 | ||
383 | mutex_lock(&hp_mutex); | |
384 | ||
385 | hp_tuners->cpu_num_base = num; | |
386 | online_cpus_count = num_online_cpus(); | |
387 | #ifdef CONFIG_HOTPLUG_CPU | |
388 | ||
389 | if (online_cpus_count < num && online_cpus_count < hp_tuners->cpu_num_limit) { | |
390 | struct hp_cpu_dbs_info_s *dbs_info; | |
391 | struct cpufreq_policy *policy; | |
392 | ||
393 | dbs_info = &per_cpu(hp_cpu_dbs_info, 0); /* TODO: FIXME, cpu = 0 */ | |
394 | policy = dbs_info->cdbs.cur_policy; | |
395 | ||
396 | dbs_freq_increase(policy, policy->max); | |
397 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_BASE; | |
398 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
399 | if (hp_wq == NULL) | |
400 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
401 | else | |
402 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
403 | } | |
404 | #endif | |
405 | ||
406 | mutex_unlock(&hp_mutex); | |
407 | } | |
408 | EXPORT_SYMBOL(hp_based_cpu_num); | |
409 | ||
410 | int hp_get_cpu_rush_boost_enable(void) | |
411 | { | |
412 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
413 | struct hp_dbs_tuners *hp_tuners; | |
414 | ||
415 | if (!dbs_data) | |
416 | return 0; | |
417 | hp_tuners = dbs_data->tuners; | |
418 | if (!hp_tuners) | |
419 | return 0; | |
420 | ||
421 | return hp_tuners->cpu_rush_boost_enable; | |
422 | } | |
423 | EXPORT_SYMBOL(hp_get_cpu_rush_boost_enable); | |
424 | ||
425 | void hp_set_cpu_rush_boost_enable(int enable) | |
426 | { | |
427 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
428 | struct hp_dbs_tuners *hp_tuners; | |
429 | ||
430 | if (!dbs_data) | |
431 | return; | |
432 | hp_tuners = dbs_data->tuners; | |
433 | if (!hp_tuners) | |
434 | return; | |
435 | ||
436 | if (enable > 1 || enable < 0) | |
437 | return; | |
438 | ||
439 | mutex_lock(&hp_mutex); | |
440 | hp_tuners->cpu_rush_boost_enable = enable; | |
441 | mutex_unlock(&hp_mutex); | |
442 | } | |
443 | EXPORT_SYMBOL(hp_set_cpu_rush_boost_enable); | |
444 | ||
445 | #ifdef CONFIG_HOTPLUG_CPU | |
446 | ||
447 | #ifdef CONFIG_MTK_SCHED_RQAVG_KS | |
448 | extern void sched_get_nr_running_avg(int *avg, int *iowait_avg); | |
449 | #else /* #ifdef CONFIG_MTK_SCHED_RQAVG_KS */ | |
450 | static void sched_get_nr_running_avg(int *avg, int *iowait_avg) | |
451 | { | |
452 | *avg = num_possible_cpus() * 100; | |
453 | } | |
454 | #endif /* #ifdef CONFIG_MTK_SCHED_RQAVG_KS */ | |
455 | ||
456 | static void hp_reset_strategy_nolock(void) | |
457 | { | |
458 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
459 | struct hp_dbs_tuners *hp_tuners; | |
460 | ||
461 | if (!dbs_data) | |
462 | return; | |
463 | hp_tuners = dbs_data->tuners; | |
464 | if (!hp_tuners) | |
465 | return; | |
466 | ||
467 | g_cpu_up_count = 0; | |
468 | g_cpu_up_sum_load = 0; | |
469 | g_cpu_up_load_index = 0; | |
470 | g_cpu_up_load_history[hp_tuners->cpu_up_avg_times - 1] = 0; | |
471 | /* memset(g_cpu_up_load_history, 0, sizeof(long) * MAX_CPU_UP_AVG_TIMES); */ | |
472 | ||
473 | g_cpu_down_count = 0; | |
474 | g_cpu_down_sum_load = 0; | |
475 | g_cpu_down_load_index = 0; | |
476 | g_cpu_down_load_history[hp_tuners->cpu_down_avg_times - 1] = 0; | |
477 | /* memset(g_cpu_down_load_history, 0, sizeof(long) * MAX_CPU_DOWN_AVG_TIMES); */ | |
478 | ||
479 | g_tlp_avg_sum = 0; | |
480 | g_tlp_avg_count = 0; | |
481 | g_tlp_avg_index = 0; | |
482 | g_tlp_avg_history[hp_tuners->cpu_rush_tlp_times - 1] = 0; | |
483 | g_cpu_rush_count = 0; | |
484 | ||
485 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_NONE; | |
486 | } | |
487 | ||
488 | static void hp_reset_strategy(void) | |
489 | { | |
490 | mutex_lock(&hp_mutex); | |
491 | ||
492 | hp_reset_strategy_nolock(); | |
493 | ||
494 | mutex_unlock(&hp_mutex); | |
495 | } | |
496 | ||
497 | static void hp_work_handler(struct work_struct *work) | |
498 | { | |
499 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
500 | struct hp_dbs_tuners *hp_tuners; | |
501 | ||
502 | if (!dbs_data) | |
503 | return; | |
504 | hp_tuners = dbs_data->tuners; | |
505 | if (!hp_tuners) | |
506 | return; | |
507 | ||
508 | if (mutex_trylock(&hp_onoff_mutex)) { | |
509 | if (!hp_tuners->is_cpu_hotplug_disable) { | |
510 | unsigned int online_cpus_count = num_online_cpus(); | |
511 | unsigned int i; | |
512 | ||
513 | pr_debug | |
514 | ("[power/hotplug] hp_work_handler(%d)(%d)(%d)(%d)(%ld)(%ld)(%d)(%d) begin\n", | |
515 | g_trigger_hp_work, g_tlp_avg_average, g_tlp_avg_current, | |
516 | g_cpus_sum_load_current, g_cpu_up_sum_load, g_cpu_down_sum_load, | |
517 | hp_tuners->cpu_num_base, hp_tuners->cpu_num_limit); | |
518 | ||
519 | switch (g_trigger_hp_work) { | |
520 | case CPU_HOTPLUG_WORK_TYPE_RUSH: | |
521 | for (i = online_cpus_count; | |
522 | i < min(g_next_hp_action, hp_tuners->cpu_num_limit); ++i) | |
523 | cpu_up(i); | |
524 | ||
525 | break; | |
526 | ||
527 | case CPU_HOTPLUG_WORK_TYPE_BASE: | |
528 | for (i = online_cpus_count; | |
529 | i < min(hp_tuners->cpu_num_base, hp_tuners->cpu_num_limit); | |
530 | ++i) | |
531 | cpu_up(i); | |
532 | ||
533 | break; | |
534 | ||
535 | case CPU_HOTPLUG_WORK_TYPE_LIMIT: | |
536 | for (i = online_cpus_count - 1; i >= hp_tuners->cpu_num_limit; --i) | |
537 | cpu_down(i); | |
538 | ||
539 | break; | |
540 | ||
541 | case CPU_HOTPLUG_WORK_TYPE_UP: | |
542 | for (i = online_cpus_count; i < g_next_hp_action; ++i) | |
543 | cpu_up(i); | |
544 | ||
545 | break; | |
546 | ||
547 | case CPU_HOTPLUG_WORK_TYPE_DOWN: | |
548 | for (i = online_cpus_count - 1; i >= g_next_hp_action; --i) | |
549 | cpu_down(i); | |
550 | ||
551 | break; | |
552 | ||
553 | default: | |
554 | for (i = online_cpus_count; | |
555 | i < min(hp_tuners->cpu_input_boost_num, | |
556 | hp_tuners->cpu_num_limit); ++i) | |
557 | cpu_up(i); | |
558 | ||
559 | /* pr_debug("[power/hotplug] cpu input boost\n"); */ | |
560 | break; | |
561 | } | |
562 | ||
563 | hp_reset_strategy(); | |
564 | dbs_ignore = 0; /* force trigger frequency scaling */ | |
565 | ||
566 | pr_debug("[power/hotplug] hp_work_handler end\n"); | |
567 | ||
568 | /* | |
569 | if (g_next_hp_action) // turn on CPU | |
570 | { | |
571 | if (online_cpus_count < num_possible_cpus()) | |
572 | { | |
573 | pr_debug("hp_work_handler: cpu_up(%d) kick off\n", online_cpus_count); | |
574 | cpu_up(online_cpus_count); | |
575 | hp_reset_strategy(); | |
576 | pr_debug("hp_work_handler: cpu_up(%d) completion\n", online_cpus_count); | |
577 | ||
578 | dbs_ignore = 0; // force trigger frequency scaling | |
579 | } | |
580 | } | |
581 | else // turn off CPU | |
582 | { | |
583 | if (online_cpus_count > 1) | |
584 | { | |
585 | pr_debug("hp_work_handler: cpu_down(%d) kick off\n", (online_cpus_count - 1)); | |
586 | cpu_down((online_cpus_count - 1)); | |
587 | hp_reset_strategy(); | |
588 | pr_debug("hp_work_handler: cpu_down(%d) completion\n", (online_cpus_count - 1)); | |
589 | ||
590 | dbs_ignore = 0; // force trigger frequency scaling | |
591 | } | |
592 | } | |
593 | */ | |
594 | } | |
595 | ||
596 | mutex_unlock(&hp_onoff_mutex); | |
597 | } | |
598 | } | |
599 | #endif /* #ifdef CONFIG_HOTPLUG_CPU */ | |
600 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
601 | ||
602 | /* | |
603 | * Every sampling_rate, we check, if current idle time is less than 20% | |
604 | * (default), then we try to increase frequency. Every sampling_rate, we look | |
605 | * for the lowest frequency which can sustain the load while keeping idle time | |
606 | * over 30%. If such a frequency exist, we try to decrease to this frequency. | |
607 | * | |
608 | * Any frequency increase takes it to the maximum frequency. Frequency reduction | |
609 | * happens at minimum steps of 5% (default) of current frequency | |
610 | */ | |
611 | static void hp_check_cpu(int cpu, unsigned int load_freq) | |
612 | { | |
613 | struct hp_cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, cpu); | |
614 | struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy; | |
615 | struct dbs_data *dbs_data = policy->governor_data; | |
616 | struct hp_dbs_tuners *hp_tuners; | |
617 | ||
618 | if (!dbs_data) | |
619 | return; | |
620 | hp_tuners = dbs_data->tuners; | |
621 | if (!hp_tuners) | |
622 | return; | |
623 | ||
624 | dbs_info->freq_lo = 0; | |
625 | ||
626 | /* pr_emerg("***** cpu: %d, load_freq: %u, smp_processor_id: %d *****\n", cpu, load_freq, smp_processor_id()); */ | |
627 | ||
628 | /* Check for frequency increase */ | |
629 | if (load_freq > hp_tuners->up_threshold * policy->cur) { | |
630 | /* If switching to max speed, apply sampling_down_factor */ | |
631 | if (policy->cur < policy->max) | |
632 | dbs_info->rate_mult = hp_tuners->sampling_down_factor; | |
633 | dbs_freq_increase(policy, policy->max); | |
634 | goto hp_check; /* <-XXX */ | |
635 | } | |
636 | ||
637 | /* Check for frequency decrease */ | |
638 | /* if we cannot reduce the frequency anymore, break out early */ | |
639 | if (policy->cur == policy->min) | |
640 | goto hp_check; /* <-XXX */ | |
641 | ||
642 | /* | |
643 | * The optimal frequency is the frequency that is the lowest that can | |
644 | * support the current CPU usage without triggering the up policy. To be | |
645 | * safe, we focus 10 points under the threshold. | |
646 | */ | |
647 | if (load_freq < hp_tuners->adj_up_threshold * policy->cur) { | |
648 | unsigned int freq_next; | |
649 | freq_next = load_freq / hp_tuners->adj_up_threshold; | |
650 | ||
651 | /* No longer fully busy, reset rate_mult */ | |
652 | dbs_info->rate_mult = 1; | |
653 | ||
654 | if (freq_next < policy->min) | |
655 | freq_next = policy->min; | |
656 | ||
657 | if (!hp_tuners->powersave_bias) { | |
658 | __cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L); | |
659 | } else { | |
660 | freq_next = hp_ops.powersave_bias_target(policy, freq_next, | |
661 | CPUFREQ_RELATION_L); | |
662 | __cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L); | |
663 | } | |
664 | } | |
665 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
666 | hp_check:{ | |
667 | #ifdef CONFIG_HOTPLUG_CPU | |
668 | long cpus_sum_load_last_up = 0; | |
669 | long cpus_sum_load_last_down = 0; | |
670 | unsigned int online_cpus_count; | |
671 | ||
672 | int v_tlp_avg_last = 0; | |
673 | #endif | |
674 | ||
675 | /* If Hot Plug policy disable, return directly */ | |
676 | if (hp_tuners->is_cpu_hotplug_disable) | |
677 | return; | |
678 | ||
679 | #ifdef CONFIG_HOTPLUG_CPU | |
680 | ||
681 | if (g_trigger_hp_work != CPU_HOTPLUG_WORK_TYPE_NONE) | |
682 | return; | |
683 | ||
684 | mutex_lock(&hp_mutex); | |
685 | ||
686 | online_cpus_count = num_online_cpus(); | |
687 | ||
688 | sched_get_nr_running_avg(&g_tlp_avg_current, &g_tlp_iowait_av); | |
689 | ||
690 | v_tlp_avg_last = g_tlp_avg_history[g_tlp_avg_index]; | |
691 | g_tlp_avg_history[g_tlp_avg_index] = g_tlp_avg_current; | |
692 | g_tlp_avg_sum += g_tlp_avg_current; | |
693 | ||
694 | g_tlp_avg_index = | |
695 | (g_tlp_avg_index + 1 == | |
696 | hp_tuners->cpu_rush_tlp_times) ? 0 : g_tlp_avg_index + 1; | |
697 | g_tlp_avg_count++; | |
698 | ||
699 | if (g_tlp_avg_count >= hp_tuners->cpu_rush_tlp_times) { | |
700 | if (g_tlp_avg_sum > v_tlp_avg_last) | |
701 | g_tlp_avg_sum -= v_tlp_avg_last; | |
702 | else | |
703 | g_tlp_avg_sum = 0; | |
704 | } | |
705 | ||
706 | g_tlp_avg_average = g_tlp_avg_sum / hp_tuners->cpu_rush_tlp_times; | |
707 | ||
708 | if (hp_tuners->cpu_rush_boost_enable) { | |
709 | /* pr_debug("@@@@@@@@@@@@@@@@@@@@@@@@@@@ tlp: %d @@@@@@@@@@@@@@@@@@@@@@@@@@@\n", g_tlp_avg_average); */ | |
710 | ||
711 | if (g_cpus_sum_load_current > | |
712 | hp_tuners->cpu_rush_threshold * online_cpus_count) | |
713 | ++g_cpu_rush_count; | |
714 | else | |
715 | g_cpu_rush_count = 0; | |
716 | ||
717 | if ((g_cpu_rush_count >= hp_tuners->cpu_rush_avg_times) && | |
718 | (online_cpus_count * 100 < g_tlp_avg_average) && | |
719 | (online_cpus_count < hp_tuners->cpu_num_limit) && | |
720 | (online_cpus_count < num_possible_cpus())) { | |
721 | dbs_freq_increase(policy, policy->max); | |
722 | pr_debug("dbs_check_cpu: turn on CPU\n"); | |
723 | g_next_hp_action = | |
724 | g_tlp_avg_average / 100 + (g_tlp_avg_average % 100 ? 1 : 0); | |
725 | ||
726 | if (g_next_hp_action > num_possible_cpus()) | |
727 | g_next_hp_action = num_possible_cpus(); | |
728 | ||
729 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_RUSH; | |
730 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
731 | if (hp_wq == NULL) | |
732 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
733 | else | |
734 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
735 | ||
736 | goto hp_check_end; | |
737 | } | |
738 | } | |
739 | ||
740 | if (online_cpus_count < hp_tuners->cpu_num_base | |
741 | && online_cpus_count < hp_tuners->cpu_num_limit) { | |
742 | dbs_freq_increase(policy, policy->max); | |
743 | pr_debug("dbs_check_cpu: turn on CPU\n"); | |
744 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_BASE; | |
745 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
746 | if (hp_wq == NULL) | |
747 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
748 | else | |
749 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
750 | ||
751 | goto hp_check_end; | |
752 | } | |
753 | ||
754 | if (online_cpus_count > hp_tuners->cpu_num_limit) { | |
755 | dbs_freq_increase(policy, policy->max); | |
756 | pr_debug("dbs_check_cpu: turn off CPU\n"); | |
757 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_LIMIT; | |
758 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
759 | if (hp_wq == NULL) | |
760 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
761 | else | |
762 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
763 | ||
764 | goto hp_check_end; | |
765 | } | |
766 | ||
767 | /* Check CPU loading to power up slave CPU */ | |
768 | if (online_cpus_count < num_possible_cpus()) { | |
769 | cpus_sum_load_last_up = g_cpu_up_load_history[g_cpu_up_load_index]; | |
770 | g_cpu_up_load_history[g_cpu_up_load_index] = g_cpus_sum_load_current; | |
771 | g_cpu_up_sum_load += g_cpus_sum_load_current; | |
772 | ||
773 | g_cpu_up_count++; | |
774 | g_cpu_up_load_index = | |
775 | (g_cpu_up_load_index + 1 == | |
776 | hp_tuners->cpu_up_avg_times) ? 0 : g_cpu_up_load_index + 1; | |
777 | ||
778 | if (g_cpu_up_count >= hp_tuners->cpu_up_avg_times) { | |
779 | if (g_cpu_up_sum_load > cpus_sum_load_last_up) | |
780 | g_cpu_up_sum_load -= cpus_sum_load_last_up; | |
781 | else | |
782 | g_cpu_up_sum_load = 0; | |
783 | ||
784 | /* g_cpu_up_sum_load /= hp_tuners->cpu_up_avg_times; */ | |
785 | if (g_cpu_up_sum_load > | |
786 | (hp_tuners->cpu_up_threshold * online_cpus_count * | |
787 | hp_tuners->cpu_up_avg_times)) { | |
788 | if (online_cpus_count < hp_tuners->cpu_num_limit) { | |
789 | #ifdef DEBUG_LOG | |
790 | pr_debug("dbs_check_cpu: g_cpu_up_sum_load = %d\n", | |
791 | g_cpu_up_sum_load); | |
792 | #endif | |
793 | dbs_freq_increase(policy, policy->max); | |
794 | pr_debug("dbs_check_cpu: turn on CPU\n"); | |
795 | g_next_hp_action = online_cpus_count + 1; | |
796 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_UP; | |
797 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
798 | if (hp_wq == NULL) | |
799 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
800 | else | |
801 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
802 | ||
803 | goto hp_check_end; | |
804 | } | |
805 | } | |
806 | } | |
807 | #ifdef DEBUG_LOG | |
808 | pr_debug("dbs_check_cpu: g_cpu_up_count = %d, g_cpu_up_sum_load = %d\n", | |
809 | g_cpu_up_count, g_cpu_up_sum_load); | |
810 | pr_debug("dbs_check_cpu: cpu_up_threshold = %d\n", | |
811 | (hp_tuners->cpu_up_threshold * online_cpus_count)); | |
812 | #endif | |
813 | ||
814 | } | |
815 | ||
816 | /* Check CPU loading to power down slave CPU */ | |
817 | if (online_cpus_count > 1) { | |
818 | cpus_sum_load_last_down = g_cpu_down_load_history[g_cpu_down_load_index]; | |
819 | g_cpu_down_load_history[g_cpu_down_load_index] = g_cpus_sum_load_current; | |
820 | g_cpu_down_sum_load += g_cpus_sum_load_current; | |
821 | ||
822 | g_cpu_down_count++; | |
823 | g_cpu_down_load_index = | |
824 | (g_cpu_down_load_index + 1 == | |
825 | hp_tuners->cpu_down_avg_times) ? 0 : g_cpu_down_load_index + 1; | |
826 | ||
827 | if (g_cpu_down_count >= hp_tuners->cpu_down_avg_times) { | |
828 | long cpu_down_threshold; | |
829 | ||
830 | if (g_cpu_down_sum_load > cpus_sum_load_last_down) | |
831 | g_cpu_down_sum_load -= cpus_sum_load_last_down; | |
832 | else | |
833 | g_cpu_down_sum_load = 0; | |
834 | ||
835 | g_next_hp_action = online_cpus_count; | |
836 | cpu_down_threshold = | |
837 | ((hp_tuners->cpu_up_threshold - | |
838 | hp_tuners->cpu_down_differential) * | |
839 | hp_tuners->cpu_down_avg_times); | |
840 | ||
841 | while ((g_cpu_down_sum_load < | |
842 | cpu_down_threshold * (g_next_hp_action - 1)) && | |
843 | /* (g_next_hp_action > tlp_cpu_num) && */ | |
844 | (g_next_hp_action > hp_tuners->cpu_num_base)) | |
845 | --g_next_hp_action; | |
846 | ||
847 | /* pr_debug("### g_next_hp_action: %d, tlp_cpu_num: %d, g_cpu_down_sum_load / hp_tuners->cpu_down_avg_times: %d ###\n", g_next_hp_action, tlp_cpu_num, g_cpu_down_sum_load / hp_tuners->cpu_down_avg_times); */ | |
848 | if (g_next_hp_action < online_cpus_count) { | |
849 | #ifdef DEBUG_LOG | |
850 | pr_debug("dbs_check_cpu: g_cpu_down_sum_load = %d\n", | |
851 | g_cpu_down_sum_load); | |
852 | #endif | |
853 | dbs_freq_increase(policy, policy->max); | |
854 | pr_debug("dbs_check_cpu: turn off CPU\n"); | |
855 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_DOWN; | |
856 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
857 | if (hp_wq == NULL) | |
858 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
859 | else | |
860 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
861 | } | |
862 | } | |
863 | #ifdef DEBUG_LOG | |
864 | pr_debug("dbs_check_cpu: g_cpu_down_count = %d, g_cpu_down_sum_load = %d\n", | |
865 | g_cpu_down_count, g_cpu_down_sum_load); | |
866 | pr_debug("dbs_check_cpu: cpu_down_threshold = %d\n", | |
867 | ((hp_tuners->cpu_up_threshold - | |
868 | hp_tuners->cpu_down_differential) * (online_cpus_count - 1))); | |
869 | #endif | |
870 | } | |
871 | ||
872 | hp_check_end: | |
873 | mutex_unlock(&hp_mutex); | |
874 | ||
875 | #endif /* #ifdef CONFIG_HOTPLUG_CPU */ | |
876 | } | |
877 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
878 | } | |
879 | ||
880 | static void hp_dbs_timer(struct work_struct *work) | |
881 | { | |
882 | struct hp_cpu_dbs_info_s *dbs_info = | |
883 | container_of(work, struct hp_cpu_dbs_info_s, cdbs.work.work); | |
884 | unsigned int cpu = dbs_info->cdbs.cur_policy->cpu; | |
885 | struct hp_cpu_dbs_info_s *core_dbs_info = &per_cpu(hp_cpu_dbs_info, | |
886 | cpu); | |
887 | struct dbs_data *dbs_data = dbs_info->cdbs.cur_policy->governor_data; | |
888 | struct hp_dbs_tuners *hp_tuners; | |
889 | ||
890 | int delay = 0, sample_type = core_dbs_info->sample_type; | |
891 | bool modify_all = true; | |
892 | ||
893 | if (!dbs_data) | |
894 | return; | |
895 | hp_tuners = dbs_data->tuners; | |
896 | if (!hp_tuners) | |
897 | return; | |
898 | ||
899 | mutex_lock(&core_dbs_info->cdbs.timer_mutex); | |
900 | if (!need_load_eval(&core_dbs_info->cdbs, hp_tuners->sampling_rate)) { | |
901 | modify_all = false; | |
902 | goto max_delay; | |
903 | } | |
904 | ||
905 | /* Common NORMAL_SAMPLE setup */ | |
906 | core_dbs_info->sample_type = HP_NORMAL_SAMPLE; | |
907 | if (sample_type == HP_SUB_SAMPLE) { | |
908 | delay = core_dbs_info->freq_lo_jiffies; | |
909 | __cpufreq_driver_target(core_dbs_info->cdbs.cur_policy, | |
910 | core_dbs_info->freq_lo, CPUFREQ_RELATION_H); | |
911 | } else { | |
912 | dbs_check_cpu(dbs_data, cpu); | |
913 | if (core_dbs_info->freq_lo) { | |
914 | /* Setup timer for SUB_SAMPLE */ | |
915 | core_dbs_info->sample_type = HP_SUB_SAMPLE; | |
916 | delay = core_dbs_info->freq_hi_jiffies; | |
917 | } | |
918 | } | |
919 | ||
920 | max_delay: | |
921 | if (!delay) | |
922 | delay = delay_for_sampling_rate(hp_tuners->sampling_rate | |
923 | * core_dbs_info->rate_mult); | |
924 | ||
925 | gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy, delay, modify_all); | |
926 | mutex_unlock(&core_dbs_info->cdbs.timer_mutex); | |
927 | ||
928 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
929 | /* for downgrade */ /* TODO: FIXME */ | |
930 | if (cpufreq_freq_check) | |
931 | cpufreq_freq_check(0); /* TODO: FIXME, fix cpuid = 0 */ | |
932 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
933 | } | |
934 | ||
935 | /************************** sysfs interface ************************/ | |
936 | static struct common_dbs_data hp_dbs_cdata; | |
937 | ||
938 | /** | |
939 | * update_sampling_rate - update sampling rate effective immediately if needed. | |
940 | * @new_rate: new sampling rate | |
941 | * | |
942 | * If new rate is smaller than the old, simply updating | |
943 | * dbs_tuners_int.sampling_rate might not be appropriate. For example, if the | |
944 | * original sampling_rate was 1 second and the requested new sampling rate is 10 | |
945 | * ms because the user needs immediate reaction from hotplug governor, but not | |
946 | * sure if higher frequency will be required or not, then, the governor may | |
947 | * change the sampling rate too late; up to 1 second later. Thus, if we are | |
948 | * reducing the sampling rate, we need to make the new value effective | |
949 | * immediately. | |
950 | */ | |
951 | static void update_sampling_rate(struct dbs_data *dbs_data, unsigned int new_rate) | |
952 | { | |
953 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
954 | ||
955 | hp_tuners->sampling_rate = new_rate = max(new_rate, dbs_data->min_sampling_rate); | |
956 | ||
957 | { | |
958 | struct cpufreq_policy *policy; | |
959 | struct hp_cpu_dbs_info_s *dbs_info; | |
960 | unsigned long next_sampling, appointed_at; | |
961 | ||
962 | policy = cpufreq_cpu_get(0); | |
963 | if (!policy) | |
964 | return; | |
965 | if (policy->governor != &cpufreq_gov_hotplug) { | |
966 | cpufreq_cpu_put(policy); | |
967 | return; | |
968 | } | |
969 | dbs_info = &per_cpu(hp_cpu_dbs_info, 0); | |
970 | cpufreq_cpu_put(policy); | |
971 | ||
972 | mutex_lock(&dbs_info->cdbs.timer_mutex); | |
973 | ||
974 | if (!delayed_work_pending(&dbs_info->cdbs.work)) { | |
975 | mutex_unlock(&dbs_info->cdbs.timer_mutex); | |
976 | return; | |
977 | } | |
978 | ||
979 | next_sampling = jiffies + usecs_to_jiffies(new_rate); | |
980 | appointed_at = dbs_info->cdbs.work.timer.expires; | |
981 | ||
982 | if (time_before(next_sampling, appointed_at)) { | |
983 | ||
984 | mutex_unlock(&dbs_info->cdbs.timer_mutex); | |
985 | cancel_delayed_work_sync(&dbs_info->cdbs.work); | |
986 | mutex_lock(&dbs_info->cdbs.timer_mutex); | |
987 | ||
988 | gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy, | |
989 | usecs_to_jiffies(new_rate), true); | |
990 | ||
991 | } | |
992 | mutex_unlock(&dbs_info->cdbs.timer_mutex); | |
993 | } | |
994 | } | |
995 | ||
996 | void hp_enable_timer(int enable) | |
997 | { | |
998 | #if 1 | |
999 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
1000 | static unsigned int sampling_rate_backup = 0; | |
1001 | ||
1002 | if (!dbs_data || dbs_data->cdata->governor != GOV_HOTPLUG || (enable && !sampling_rate_backup)) | |
1003 | return; | |
1004 | ||
1005 | if (enable) | |
1006 | update_sampling_rate(dbs_data, sampling_rate_backup); | |
1007 | else { | |
1008 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1009 | ||
1010 | sampling_rate_backup = hp_tuners->sampling_rate; | |
1011 | update_sampling_rate(dbs_data, 30000 * 100); | |
1012 | } | |
1013 | #else | |
1014 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
1015 | int cpu = 0; | |
1016 | struct cpufreq_policy *policy; | |
1017 | struct hp_dbs_tuners *hp_tuners; | |
1018 | struct hp_cpu_dbs_info_s *dbs_info; | |
1019 | ||
1020 | policy = cpufreq_cpu_get(cpu); | |
1021 | if (!policy) | |
1022 | continue; | |
1023 | if (policy->governor != &cpufreq_gov_hotplug) { | |
1024 | cpufreq_cpu_put(policy); | |
1025 | continue; | |
1026 | } | |
1027 | dbs_info = &per_cpu(hp_cpu_dbs_info, cpu); | |
1028 | cpufreq_cpu_put(policy); | |
1029 | ||
1030 | if (enable) { | |
1031 | hp_tuners = dbs_data->tuners; | |
1032 | mutex_lock(&dbs_info->cdbs.timer_mutex); | |
1033 | gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy, usecs_to_jiffies(hp_tuners->sampling_rate), true); | |
1034 | mutex_unlock(&dbs_info->cdbs.timer_mutex); | |
1035 | } else | |
1036 | cancel_delayed_work_sync(&dbs_info->cdbs.work); | |
1037 | } | |
1038 | #endif | |
1039 | } | |
1040 | EXPORT_SYMBOL(hp_enable_timer); | |
1041 | ||
1042 | static ssize_t store_sampling_rate(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1043 | { | |
1044 | unsigned int input; | |
1045 | int ret; | |
1046 | ret = sscanf(buf, "%u", &input); | |
1047 | if (ret != 1) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | update_sampling_rate(dbs_data, input); | |
1051 | return count; | |
1052 | } | |
1053 | ||
1054 | static ssize_t store_io_is_busy(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1055 | { | |
1056 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1057 | unsigned int input; | |
1058 | int ret; | |
1059 | unsigned int j; | |
1060 | ||
1061 | ret = sscanf(buf, "%u", &input); | |
1062 | if (ret != 1) | |
1063 | return -EINVAL; | |
1064 | hp_tuners->io_is_busy = !!input; | |
1065 | ||
1066 | /* we need to re-evaluate prev_cpu_idle */ | |
1067 | for_each_online_cpu(j) { | |
1068 | struct hp_cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, | |
1069 | j); | |
1070 | dbs_info->cdbs.prev_cpu_idle = get_cpu_idle_time(j, | |
1071 | &dbs_info->cdbs.prev_cpu_wall, | |
1072 | hp_tuners->io_is_busy); | |
1073 | } | |
1074 | return count; | |
1075 | } | |
1076 | ||
1077 | static ssize_t store_up_threshold(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1078 | { | |
1079 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1080 | unsigned int input; | |
1081 | int ret; | |
1082 | ret = sscanf(buf, "%u", &input); | |
1083 | ||
1084 | if (ret != 1 || input > MAX_FREQUENCY_UP_THRESHOLD || input < MIN_FREQUENCY_UP_THRESHOLD) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | /* Calculate the new adj_up_threshold */ | |
1088 | hp_tuners->adj_up_threshold += input; | |
1089 | hp_tuners->adj_up_threshold -= hp_tuners->up_threshold; | |
1090 | ||
1091 | hp_tuners->up_threshold = input; | |
1092 | return count; | |
1093 | } | |
1094 | ||
1095 | static ssize_t store_sampling_down_factor(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1096 | { | |
1097 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1098 | unsigned int input, j; | |
1099 | int ret; | |
1100 | ret = sscanf(buf, "%u", &input); | |
1101 | ||
1102 | if (ret != 1 || input > MAX_SAMPLING_DOWN_FACTOR || input < 1) | |
1103 | return -EINVAL; | |
1104 | hp_tuners->sampling_down_factor = input; | |
1105 | ||
1106 | /* Reset down sampling multiplier in case it was active */ | |
1107 | for_each_online_cpu(j) { | |
1108 | struct hp_cpu_dbs_info_s *dbs_info = &per_cpu(hp_cpu_dbs_info, | |
1109 | j); | |
1110 | dbs_info->rate_mult = 1; | |
1111 | } | |
1112 | return count; | |
1113 | } | |
1114 | ||
1115 | static ssize_t store_ignore_nice_load(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1116 | { | |
1117 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1118 | unsigned int input; | |
1119 | int ret; | |
1120 | ||
1121 | unsigned int j; | |
1122 | ||
1123 | ret = sscanf(buf, "%u", &input); | |
1124 | if (ret != 1) | |
1125 | return -EINVAL; | |
1126 | ||
1127 | if (input > 1) | |
1128 | input = 1; | |
1129 | ||
1130 | if (input == hp_tuners->ignore_nice_load) /* nothing to do */ | |
1131 | return count; | |
1132 | ||
1133 | hp_tuners->ignore_nice_load = input; | |
1134 | ||
1135 | /* we need to re-evaluate prev_cpu_idle */ | |
1136 | for_each_online_cpu(j) { | |
1137 | struct hp_cpu_dbs_info_s *dbs_info; | |
1138 | dbs_info = &per_cpu(hp_cpu_dbs_info, j); | |
1139 | dbs_info->cdbs.prev_cpu_idle = get_cpu_idle_time(j, | |
1140 | &dbs_info->cdbs.prev_cpu_wall, | |
1141 | hp_tuners->io_is_busy); | |
1142 | if (hp_tuners->ignore_nice_load) | |
1143 | dbs_info->cdbs.prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE]; | |
1144 | ||
1145 | } | |
1146 | return count; | |
1147 | } | |
1148 | ||
1149 | static ssize_t store_powersave_bias(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1150 | { | |
1151 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1152 | unsigned int input; | |
1153 | int ret; | |
1154 | ret = sscanf(buf, "%u", &input); | |
1155 | ||
1156 | if (ret != 1) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | if (input > 1000) | |
1160 | input = 1000; | |
1161 | ||
1162 | hp_tuners->powersave_bias = input; | |
1163 | hotplug_powersave_bias_init(); | |
1164 | return count; | |
1165 | } | |
1166 | ||
1167 | show_store_one(hp, sampling_rate); | |
1168 | show_store_one(hp, io_is_busy); | |
1169 | show_store_one(hp, up_threshold); | |
1170 | show_store_one(hp, sampling_down_factor); | |
1171 | show_store_one(hp, ignore_nice_load); | |
1172 | show_store_one(hp, powersave_bias); | |
1173 | declare_show_sampling_rate_min(hp); | |
1174 | ||
1175 | gov_sys_pol_attr_rw(sampling_rate); | |
1176 | gov_sys_pol_attr_rw(io_is_busy); | |
1177 | gov_sys_pol_attr_rw(up_threshold); | |
1178 | gov_sys_pol_attr_rw(sampling_down_factor); | |
1179 | gov_sys_pol_attr_rw(ignore_nice_load); | |
1180 | gov_sys_pol_attr_rw(powersave_bias); | |
1181 | gov_sys_pol_attr_ro(sampling_rate_min); | |
1182 | ||
1183 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1184 | static ssize_t store_down_differential(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1185 | { | |
1186 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1187 | unsigned int input; | |
1188 | int ret; | |
1189 | ret = sscanf(buf, "%u", &input); | |
1190 | ||
1191 | if (ret != 1 | |
1192 | || input > MAX_FREQUENCY_DOWN_DIFFERENTIAL || input < MIN_FREQUENCY_DOWN_DIFFERENTIAL) | |
1193 | return -EINVAL; | |
1194 | ||
1195 | hp_tuners->down_differential = input; | |
1196 | ||
1197 | return count; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * cpu hotplug - function definition of sysfs | |
1202 | */ | |
1203 | static ssize_t store_cpu_up_threshold(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1204 | { | |
1205 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1206 | unsigned int input; | |
1207 | int ret; | |
1208 | ret = sscanf(buf, "%u", &input); | |
1209 | ||
1210 | if (ret != 1 || input > MAX_CPU_UP_THRESHOLD || input < MIN_CPU_UP_THRESHOLD) | |
1211 | return -EINVAL; | |
1212 | ||
1213 | mutex_lock(&hp_mutex); | |
1214 | hp_tuners->cpu_up_threshold = input; | |
1215 | hp_reset_strategy_nolock(); | |
1216 | mutex_unlock(&hp_mutex); | |
1217 | ||
1218 | return count; | |
1219 | } | |
1220 | ||
1221 | static ssize_t store_cpu_down_differential(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1222 | { | |
1223 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1224 | unsigned int input; | |
1225 | int ret; | |
1226 | ret = sscanf(buf, "%u", &input); | |
1227 | ||
1228 | if (ret != 1 || input > MAX_CPU_DOWN_DIFFERENTIAL || input < MIN_CPU_DOWN_DIFFERENTIAL) | |
1229 | return -EINVAL; | |
1230 | ||
1231 | mutex_lock(&hp_mutex); | |
1232 | hp_tuners->cpu_down_differential = input; | |
1233 | hp_reset_strategy_nolock(); | |
1234 | mutex_unlock(&hp_mutex); | |
1235 | ||
1236 | return count; | |
1237 | } | |
1238 | ||
1239 | static ssize_t store_cpu_up_avg_times(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1240 | { | |
1241 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1242 | unsigned int input; | |
1243 | int ret; | |
1244 | ret = sscanf(buf, "%u", &input); | |
1245 | ||
1246 | if (ret != 1 || input > MAX_CPU_UP_AVG_TIMES || input < MIN_CPU_UP_AVG_TIMES) | |
1247 | return -EINVAL; | |
1248 | ||
1249 | mutex_lock(&hp_mutex); | |
1250 | hp_tuners->cpu_up_avg_times = input; | |
1251 | hp_reset_strategy_nolock(); | |
1252 | mutex_unlock(&hp_mutex); | |
1253 | ||
1254 | return count; | |
1255 | } | |
1256 | ||
1257 | static ssize_t store_cpu_down_avg_times(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1258 | { | |
1259 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1260 | unsigned int input; | |
1261 | int ret; | |
1262 | ret = sscanf(buf, "%u", &input); | |
1263 | ||
1264 | if (ret != 1 || input > MAX_CPU_DOWN_AVG_TIMES || input < MIN_CPU_DOWN_AVG_TIMES) | |
1265 | return -EINVAL; | |
1266 | ||
1267 | mutex_lock(&hp_mutex); | |
1268 | hp_tuners->cpu_down_avg_times = input; | |
1269 | hp_reset_strategy_nolock(); | |
1270 | mutex_unlock(&hp_mutex); | |
1271 | ||
1272 | return count; | |
1273 | } | |
1274 | ||
1275 | static ssize_t store_cpu_num_limit(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1276 | { | |
1277 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1278 | unsigned int input; | |
1279 | int ret; | |
1280 | ret = sscanf(buf, "%u", &input); | |
1281 | ||
1282 | if (ret != 1 || input > num_possible_cpus() | |
1283 | || input < 1) | |
1284 | return -EINVAL; | |
1285 | ||
1286 | mutex_lock(&hp_mutex); | |
1287 | hp_tuners->cpu_num_limit = input; | |
1288 | mutex_unlock(&hp_mutex); | |
1289 | ||
1290 | return count; | |
1291 | } | |
1292 | ||
1293 | static ssize_t store_cpu_num_base(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1294 | { | |
1295 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1296 | unsigned int input; | |
1297 | unsigned int online_cpus_count; | |
1298 | int ret; | |
1299 | ret = sscanf(buf, "%u", &input); | |
1300 | ||
1301 | if (ret != 1 || input > num_possible_cpus() | |
1302 | || input < 1) | |
1303 | return -EINVAL; | |
1304 | ||
1305 | mutex_lock(&hp_mutex); | |
1306 | ||
1307 | hp_tuners->cpu_num_base = input; | |
1308 | online_cpus_count = num_online_cpus(); | |
1309 | #ifdef CONFIG_HOTPLUG_CPU | |
1310 | ||
1311 | if (online_cpus_count < input && online_cpus_count < hp_tuners->cpu_num_limit) { | |
1312 | struct cpufreq_policy *policy = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy; /* TODO: FIXME, cpu = 0 */ | |
1313 | ||
1314 | dbs_freq_increase(policy, policy->max); | |
1315 | g_trigger_hp_work = CPU_HOTPLUG_WORK_TYPE_BASE; | |
1316 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
1317 | if (hp_wq == NULL) | |
1318 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
1319 | else | |
1320 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
1321 | } | |
1322 | #endif | |
1323 | ||
1324 | mutex_unlock(&hp_mutex); | |
1325 | ||
1326 | return count; | |
1327 | } | |
1328 | ||
1329 | static ssize_t store_is_cpu_hotplug_disable(struct dbs_data *dbs_data, const char *buf, | |
1330 | size_t count) | |
1331 | { | |
1332 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1333 | unsigned int input; | |
1334 | int ret; | |
1335 | ret = sscanf(buf, "%u", &input); | |
1336 | ||
1337 | if (ret != 1 || input > 1 || input < 0) | |
1338 | return -EINVAL; | |
1339 | ||
1340 | mutex_lock(&hp_mutex); | |
1341 | ||
1342 | if (hp_tuners->is_cpu_hotplug_disable && !input) | |
1343 | hp_reset_strategy_nolock(); | |
1344 | ||
1345 | hp_tuners->is_cpu_hotplug_disable = input; | |
1346 | mutex_unlock(&hp_mutex); | |
1347 | ||
1348 | return count; | |
1349 | } | |
1350 | ||
1351 | static ssize_t store_cpu_input_boost_enable(struct dbs_data *dbs_data, const char *buf, | |
1352 | size_t count) | |
1353 | { | |
1354 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1355 | unsigned int input; | |
1356 | int ret; | |
1357 | ret = sscanf(buf, "%u", &input); | |
1358 | ||
1359 | if (ret != 1 || input > 1 || input < 0) | |
1360 | return -EINVAL; | |
1361 | ||
1362 | mutex_lock(&hp_mutex); | |
1363 | hp_tuners->cpu_input_boost_enable = input; | |
1364 | mutex_unlock(&hp_mutex); | |
1365 | ||
1366 | return count; | |
1367 | } | |
1368 | ||
1369 | static ssize_t store_cpu_input_boost_num(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1370 | { | |
1371 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1372 | unsigned int input; | |
1373 | int ret; | |
1374 | ret = sscanf(buf, "%u", &input); | |
1375 | ||
1376 | if (ret != 1 || input > num_possible_cpus() | |
1377 | || input < 2) | |
1378 | return -EINVAL; | |
1379 | ||
1380 | mutex_lock(&hp_mutex); | |
1381 | hp_tuners->cpu_input_boost_num = input; | |
1382 | mutex_unlock(&hp_mutex); | |
1383 | ||
1384 | return count; | |
1385 | } | |
1386 | ||
1387 | static ssize_t store_cpu_rush_boost_enable(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1388 | { | |
1389 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1390 | unsigned int input; | |
1391 | int ret; | |
1392 | ret = sscanf(buf, "%u", &input); | |
1393 | ||
1394 | if (ret != 1 || input > 1 || input < 0) | |
1395 | return -EINVAL; | |
1396 | ||
1397 | mutex_lock(&hp_mutex); | |
1398 | hp_tuners->cpu_rush_boost_enable = input; | |
1399 | mutex_unlock(&hp_mutex); | |
1400 | ||
1401 | return count; | |
1402 | } | |
1403 | ||
1404 | static ssize_t store_cpu_rush_boost_num(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1405 | { | |
1406 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1407 | unsigned int input; | |
1408 | int ret; | |
1409 | ret = sscanf(buf, "%u", &input); | |
1410 | ||
1411 | if (ret != 1 || input > num_possible_cpus() | |
1412 | || input < 2) | |
1413 | return -EINVAL; | |
1414 | ||
1415 | mutex_lock(&hp_mutex); | |
1416 | hp_tuners->cpu_rush_boost_num = input; | |
1417 | mutex_unlock(&hp_mutex); | |
1418 | ||
1419 | return count; | |
1420 | } | |
1421 | ||
1422 | static ssize_t store_cpu_rush_threshold(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1423 | { | |
1424 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1425 | unsigned int input; | |
1426 | int ret; | |
1427 | ret = sscanf(buf, "%u", &input); | |
1428 | ||
1429 | if (ret != 1 || input > MAX_CPU_RUSH_THRESHOLD || input < MIN_CPU_RUSH_THRESHOLD) | |
1430 | return -EINVAL; | |
1431 | ||
1432 | mutex_lock(&hp_mutex); | |
1433 | hp_tuners->cpu_rush_threshold = input; | |
1434 | /* hp_reset_strategy_nolock(); //no need */ | |
1435 | mutex_unlock(&hp_mutex); | |
1436 | ||
1437 | return count; | |
1438 | } | |
1439 | ||
1440 | static ssize_t store_cpu_rush_tlp_times(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1441 | { | |
1442 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1443 | unsigned int input; | |
1444 | int ret; | |
1445 | ret = sscanf(buf, "%u", &input); | |
1446 | ||
1447 | if (ret != 1 || input > MAX_CPU_RUSH_TLP_TIMES || input < MIN_CPU_RUSH_TLP_TIMES) | |
1448 | return -EINVAL; | |
1449 | ||
1450 | mutex_lock(&hp_mutex); | |
1451 | hp_tuners->cpu_rush_tlp_times = input; | |
1452 | hp_reset_strategy_nolock(); | |
1453 | mutex_unlock(&hp_mutex); | |
1454 | ||
1455 | return count; | |
1456 | } | |
1457 | ||
1458 | static ssize_t store_cpu_rush_avg_times(struct dbs_data *dbs_data, const char *buf, size_t count) | |
1459 | { | |
1460 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1461 | unsigned int input; | |
1462 | int ret; | |
1463 | ret = sscanf(buf, "%u", &input); | |
1464 | ||
1465 | if (ret != 1 || input > MAX_CPU_RUSH_AVG_TIMES || input < MIN_CPU_RUSH_AVG_TIMES) | |
1466 | return -EINVAL; | |
1467 | ||
1468 | mutex_lock(&hp_mutex); | |
1469 | hp_tuners->cpu_rush_avg_times = input; | |
1470 | hp_reset_strategy_nolock(); | |
1471 | mutex_unlock(&hp_mutex); | |
1472 | ||
1473 | return count; | |
1474 | } | |
1475 | ||
1476 | show_store_one(hp, down_differential); | |
1477 | show_store_one(hp, cpu_up_threshold); | |
1478 | show_store_one(hp, cpu_down_differential); | |
1479 | show_store_one(hp, cpu_up_avg_times); | |
1480 | show_store_one(hp, cpu_down_avg_times); | |
1481 | show_store_one(hp, cpu_num_limit); | |
1482 | show_store_one(hp, cpu_num_base); | |
1483 | show_store_one(hp, is_cpu_hotplug_disable); | |
1484 | show_store_one(hp, cpu_input_boost_enable); | |
1485 | show_store_one(hp, cpu_input_boost_num); | |
1486 | show_store_one(hp, cpu_rush_boost_enable); | |
1487 | show_store_one(hp, cpu_rush_boost_num); | |
1488 | show_store_one(hp, cpu_rush_threshold); | |
1489 | show_store_one(hp, cpu_rush_tlp_times); | |
1490 | show_store_one(hp, cpu_rush_avg_times); | |
1491 | ||
1492 | gov_sys_pol_attr_rw(down_differential); | |
1493 | gov_sys_pol_attr_rw(cpu_up_threshold); | |
1494 | gov_sys_pol_attr_rw(cpu_down_differential); | |
1495 | gov_sys_pol_attr_rw(cpu_up_avg_times); | |
1496 | gov_sys_pol_attr_rw(cpu_down_avg_times); | |
1497 | gov_sys_pol_attr_rw(cpu_num_limit); | |
1498 | gov_sys_pol_attr_rw(cpu_num_base); | |
1499 | gov_sys_pol_attr_rw(is_cpu_hotplug_disable); | |
1500 | gov_sys_pol_attr_rw(cpu_input_boost_enable); | |
1501 | gov_sys_pol_attr_rw(cpu_input_boost_num); | |
1502 | gov_sys_pol_attr_rw(cpu_rush_boost_enable); | |
1503 | gov_sys_pol_attr_rw(cpu_rush_boost_num); | |
1504 | gov_sys_pol_attr_rw(cpu_rush_threshold); | |
1505 | gov_sys_pol_attr_rw(cpu_rush_tlp_times); | |
1506 | gov_sys_pol_attr_rw(cpu_rush_avg_times); | |
1507 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1508 | ||
1509 | static struct attribute *dbs_attributes_gov_sys[] = { | |
1510 | &sampling_rate_min_gov_sys.attr, | |
1511 | &sampling_rate_gov_sys.attr, | |
1512 | &up_threshold_gov_sys.attr, | |
1513 | &sampling_down_factor_gov_sys.attr, | |
1514 | &ignore_nice_load_gov_sys.attr, | |
1515 | &powersave_bias_gov_sys.attr, | |
1516 | &io_is_busy_gov_sys.attr, | |
1517 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1518 | &down_differential_gov_sys.attr, | |
1519 | &cpu_up_threshold_gov_sys.attr, | |
1520 | &cpu_down_differential_gov_sys.attr, | |
1521 | &cpu_up_avg_times_gov_sys.attr, | |
1522 | &cpu_down_avg_times_gov_sys.attr, | |
1523 | &cpu_num_limit_gov_sys.attr, | |
1524 | &cpu_num_base_gov_sys.attr, | |
1525 | &is_cpu_hotplug_disable_gov_sys.attr, | |
1526 | &cpu_input_boost_enable_gov_sys.attr, | |
1527 | &cpu_input_boost_num_gov_sys.attr, | |
1528 | &cpu_rush_boost_enable_gov_sys.attr, | |
1529 | &cpu_rush_boost_num_gov_sys.attr, | |
1530 | &cpu_rush_threshold_gov_sys.attr, | |
1531 | &cpu_rush_tlp_times_gov_sys.attr, | |
1532 | &cpu_rush_avg_times_gov_sys.attr, | |
1533 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1534 | NULL | |
1535 | }; | |
1536 | ||
1537 | static struct attribute_group hp_attr_group_gov_sys = { | |
1538 | .attrs = dbs_attributes_gov_sys, | |
1539 | .name = "hotplug", | |
1540 | }; | |
1541 | ||
1542 | static struct attribute *dbs_attributes_gov_pol[] = { | |
1543 | &sampling_rate_min_gov_pol.attr, | |
1544 | &sampling_rate_gov_pol.attr, | |
1545 | &up_threshold_gov_pol.attr, | |
1546 | &sampling_down_factor_gov_pol.attr, | |
1547 | &ignore_nice_load_gov_pol.attr, | |
1548 | &powersave_bias_gov_pol.attr, | |
1549 | &io_is_busy_gov_pol.attr, | |
1550 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1551 | &down_differential_gov_pol.attr, | |
1552 | &cpu_up_threshold_gov_pol.attr, | |
1553 | &cpu_down_differential_gov_pol.attr, | |
1554 | &cpu_up_avg_times_gov_pol.attr, | |
1555 | &cpu_down_avg_times_gov_pol.attr, | |
1556 | &cpu_num_limit_gov_pol.attr, | |
1557 | &cpu_num_base_gov_pol.attr, | |
1558 | &is_cpu_hotplug_disable_gov_pol.attr, | |
1559 | &cpu_input_boost_enable_gov_pol.attr, | |
1560 | &cpu_input_boost_num_gov_pol.attr, | |
1561 | &cpu_rush_boost_enable_gov_pol.attr, | |
1562 | &cpu_rush_boost_num_gov_pol.attr, | |
1563 | &cpu_rush_threshold_gov_pol.attr, | |
1564 | &cpu_rush_tlp_times_gov_pol.attr, | |
1565 | &cpu_rush_avg_times_gov_pol.attr, | |
1566 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1567 | NULL | |
1568 | }; | |
1569 | ||
1570 | static struct attribute_group hp_attr_group_gov_pol = { | |
1571 | .attrs = dbs_attributes_gov_pol, | |
1572 | .name = "hotplug", | |
1573 | }; | |
1574 | ||
1575 | /************************** sysfs end ************************/ | |
1576 | ||
1577 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1578 | ||
1579 | #ifdef CONFIG_HOTPLUG_CPU | |
1580 | ||
1581 | static struct task_struct *freq_up_task; | |
1582 | ||
1583 | static int touch_freq_up_task(void *data) | |
1584 | { | |
1585 | struct cpufreq_policy *policy; | |
1586 | ||
1587 | while (1) { | |
1588 | policy = cpufreq_cpu_get(0); | |
1589 | dbs_freq_increase(policy, policy->max); | |
1590 | cpufreq_cpu_put(policy); | |
1591 | /* mt_cpufreq_set_ramp_down_count_const(0, 100); */ | |
1592 | pr_debug("@%s():%d\n", __func__, __LINE__); | |
1593 | ||
1594 | set_current_state(TASK_INTERRUPTIBLE); | |
1595 | schedule(); | |
1596 | ||
1597 | if (kthread_should_stop()) | |
1598 | break; | |
1599 | } | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | static void dbs_input_event(struct input_handle *handle, unsigned int type, | |
1605 | unsigned int code, int value) | |
1606 | { | |
1607 | /* int i; */ | |
1608 | ||
1609 | /* if ((dbs_tuners_ins.powersave_bias == POWERSAVE_BIAS_MAXLEVEL) || */ | |
1610 | /* (dbs_tuners_ins.powersave_bias == POWERSAVE_BIAS_MINLEVEL)) { */ | |
1611 | /* nothing to do */ | |
1612 | /* return; */ | |
1613 | /* } */ | |
1614 | ||
1615 | /* for_each_online_cpu(i) { */ | |
1616 | /* queue_work_on(i, input_wq, &per_cpu(dbs_refresh_work, i)); */ | |
1617 | /* } */ | |
1618 | /* pr_debug("$$$ in_interrupt(): %d, in_irq(): %d, type: %d, code: %d, value: %d $$$\n", in_interrupt(), in_irq(), type, code, value); */ | |
1619 | ||
1620 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
1621 | struct hp_dbs_tuners *hp_tuners; | |
1622 | ||
1623 | if (!dbs_data) | |
1624 | return; | |
1625 | hp_tuners = dbs_data->tuners; | |
1626 | if (!hp_tuners) | |
1627 | return; | |
1628 | ||
1629 | if ((type == EV_KEY) && (code == BTN_TOUCH) && (value == 1) | |
1630 | && (dbs_data->cdata->governor == GOV_HOTPLUG && hp_tuners->cpu_input_boost_enable)) { | |
1631 | /* if (!in_interrupt()) */ | |
1632 | /* { */ | |
1633 | unsigned int online_cpus_count = num_online_cpus(); | |
1634 | ||
1635 | pr_debug("@%s():%d, online_cpus_count = %d, cpu_input_boost_num = %d\n", __func__, __LINE__, online_cpus_count, hp_tuners->cpu_input_boost_num); | |
1636 | ||
1637 | if (online_cpus_count < hp_tuners->cpu_input_boost_num && online_cpus_count < hp_tuners->cpu_num_limit) { | |
1638 | /* schedule_delayed_work_on(0, &hp_work, 0); */ | |
1639 | if (hp_wq == NULL) | |
1640 | pr_emerg("[power/hotplug] %s():%d, impossible\n", __func__, __LINE__); | |
1641 | else | |
1642 | queue_delayed_work_on(0, hp_wq, &hp_work, 0); | |
1643 | } | |
1644 | ||
1645 | if (online_cpus_count <= hp_tuners->cpu_input_boost_num && online_cpus_count <= hp_tuners->cpu_num_limit) | |
1646 | wake_up_process(freq_up_task); | |
1647 | ||
1648 | /* } */ | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | static int dbs_input_connect(struct input_handler *handler, | |
1653 | struct input_dev *dev, const struct input_device_id *id) | |
1654 | { | |
1655 | struct input_handle *handle; | |
1656 | int error; | |
1657 | ||
1658 | handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); | |
1659 | ||
1660 | if (!handle) | |
1661 | return -ENOMEM; | |
1662 | ||
1663 | handle->dev = dev; | |
1664 | handle->handler = handler; | |
1665 | handle->name = "cpufreq"; | |
1666 | ||
1667 | error = input_register_handle(handle); | |
1668 | ||
1669 | if (error) | |
1670 | goto err2; | |
1671 | ||
1672 | error = input_open_device(handle); | |
1673 | ||
1674 | if (error) | |
1675 | goto err1; | |
1676 | ||
1677 | return 0; | |
1678 | err1: | |
1679 | input_unregister_handle(handle); | |
1680 | err2: | |
1681 | kfree(handle); | |
1682 | return error; | |
1683 | } | |
1684 | ||
1685 | static void dbs_input_disconnect(struct input_handle *handle) | |
1686 | { | |
1687 | input_close_device(handle); | |
1688 | input_unregister_handle(handle); | |
1689 | kfree(handle); | |
1690 | } | |
1691 | ||
1692 | static const struct input_device_id dbs_ids[] = { | |
1693 | {.driver_info = 1}, | |
1694 | {}, | |
1695 | }; | |
1696 | ||
1697 | static struct input_handler dbs_input_handler = { | |
1698 | .event = dbs_input_event, | |
1699 | .connect = dbs_input_connect, | |
1700 | .disconnect = dbs_input_disconnect, | |
1701 | .name = "cpufreq_ond", | |
1702 | .id_table = dbs_ids, | |
1703 | }; | |
1704 | #endif /* #ifdef CONFIG_HOTPLUG_CPU */ | |
1705 | ||
1706 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1707 | ||
1708 | static int hp_init(struct dbs_data *dbs_data) | |
1709 | { | |
1710 | struct hp_dbs_tuners *tuners; | |
1711 | u64 idle_time; | |
1712 | int cpu; | |
1713 | ||
1714 | tuners = kzalloc(sizeof(struct hp_dbs_tuners), GFP_KERNEL); | |
1715 | if (!tuners) { | |
1716 | pr_err("%s: kzalloc failed\n", __func__); | |
1717 | return -ENOMEM; | |
1718 | } | |
1719 | ||
1720 | cpu = get_cpu(); | |
1721 | idle_time = get_cpu_idle_time_us(cpu, NULL); | |
1722 | put_cpu(); | |
1723 | if (idle_time != -1ULL) { | |
1724 | /* Idle micro accounting is supported. Use finer thresholds */ | |
1725 | tuners->up_threshold = MICRO_FREQUENCY_UP_THRESHOLD; | |
1726 | tuners->adj_up_threshold = MICRO_FREQUENCY_UP_THRESHOLD - | |
1727 | MICRO_FREQUENCY_DOWN_DIFFERENTIAL; | |
1728 | tuners->down_differential = MICRO_FREQUENCY_DOWN_DIFFERENTIAL; /* <-XXX */ | |
1729 | tuners->cpu_up_threshold = MICRO_CPU_UP_THRESHOLD; /* <-XXX */ | |
1730 | tuners->cpu_down_differential = MICRO_CPU_DOWN_DIFFERENTIAL; /* <-XXX */ | |
1731 | /* | |
1732 | * In nohz/micro accounting case we set the minimum frequency | |
1733 | * not depending on HZ, but fixed (very low). The deferred | |
1734 | * timer might skip some samples if idle/sleeping as needed. | |
1735 | */ | |
1736 | dbs_data->min_sampling_rate = MICRO_FREQUENCY_MIN_SAMPLE_RATE; | |
1737 | ||
1738 | /* cpu rush boost */ | |
1739 | tuners->cpu_rush_threshold = MICRO_CPU_RUSH_THRESHOLD; /* <-XXX */ | |
1740 | } else { | |
1741 | tuners->up_threshold = DEF_FREQUENCY_UP_THRESHOLD; | |
1742 | tuners->adj_up_threshold = DEF_FREQUENCY_UP_THRESHOLD - | |
1743 | DEF_FREQUENCY_DOWN_DIFFERENTIAL; | |
1744 | tuners->down_differential = DEF_FREQUENCY_DOWN_DIFFERENTIAL; /* <-XXX */ | |
1745 | tuners->cpu_up_threshold = DEF_CPU_UP_THRESHOLD; /* <-XXX */ | |
1746 | tuners->cpu_down_differential = DEF_CPU_DOWN_DIFFERENTIAL; /* <-XXX */ | |
1747 | ||
1748 | /* For correct statistics, we need 10 ticks for each measure */ | |
1749 | dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10); | |
1750 | ||
1751 | /* cpu rush boost */ | |
1752 | tuners->cpu_rush_threshold = DEF_CPU_RUSH_THRESHOLD; /* <-XXX */ | |
1753 | } | |
1754 | ||
1755 | tuners->sampling_down_factor = DEF_SAMPLING_DOWN_FACTOR; | |
1756 | tuners->ignore_nice_load = 0; | |
1757 | tuners->powersave_bias = default_powersave_bias; | |
1758 | tuners->io_is_busy = should_io_be_busy(); | |
1759 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1760 | tuners->cpu_up_avg_times = DEF_CPU_UP_AVG_TIMES; | |
1761 | tuners->cpu_down_avg_times = DEF_CPU_DOWN_AVG_TIMES; | |
1762 | tuners->cpu_num_limit = num_possible_cpus(); | |
1763 | tuners->cpu_num_base = 1; | |
1764 | tuners->is_cpu_hotplug_disable = (tuners->cpu_num_limit > 1) ? 0 : 1; | |
1765 | tuners->cpu_input_boost_enable = DEF_CPU_INPUT_BOOST_ENABLE; | |
1766 | tuners->cpu_input_boost_num = DEF_CPU_INPUT_BOOST_NUM; | |
1767 | tuners->cpu_rush_boost_enable = DEF_CPU_RUSH_BOOST_ENABLE; | |
1768 | tuners->cpu_rush_boost_num = num_possible_cpus(); | |
1769 | tuners->cpu_rush_tlp_times = DEF_CPU_RUSH_TLP_TIMES; | |
1770 | tuners->cpu_rush_avg_times = DEF_CPU_RUSH_AVG_TIMES; | |
1771 | ||
1772 | #ifdef CONFIG_HOTPLUG_CPU | |
1773 | INIT_DEFERRABLE_WORK(&hp_work, hp_work_handler); | |
1774 | hp_wq = alloc_workqueue("hp_work_handler", WQ_HIGHPRI, 0); | |
1775 | g_next_hp_action = num_online_cpus(); | |
1776 | #endif | |
1777 | ||
1778 | #ifdef DEBUG_LOG | |
1779 | pr_debug("cpufreq_gov_dbs_init: min_sampling_rate = %d\n", dbs_data->min_sampling_rate); | |
1780 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.up_threshold = %d\n", tuners->up_threshold); | |
1781 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.down_differential = %d\n", | |
1782 | tuners->down_differential); | |
1783 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_up_threshold = %d\n", | |
1784 | tuners->cpu_up_threshold); | |
1785 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_down_differential = %d\n", | |
1786 | tuners->cpu_down_differential); | |
1787 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_up_avg_times = %d\n", | |
1788 | tuners->cpu_up_avg_times); | |
1789 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_down_avg_times = %d\n", | |
1790 | tuners->cpu_down_avg_times); | |
1791 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_num_limit = %d\n", | |
1792 | tuners->cpu_num_limit); | |
1793 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_num_base = %d\n", tuners->cpu_num_base); | |
1794 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.is_cpu_hotplug_disable = %d\n", | |
1795 | tuners->is_cpu_hotplug_disable); | |
1796 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_input_boost_enable = %d\n", | |
1797 | tuners->cpu_input_boost_enable); | |
1798 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_input_boost_num = %d\n", | |
1799 | tuners->cpu_input_boost_num); | |
1800 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_rush_boost_enable = %d\n", | |
1801 | tuners->cpu_rush_boost_enable); | |
1802 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_rush_boost_num = %d\n", | |
1803 | tuners->cpu_rush_boost_num); | |
1804 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_rush_threshold = %d\n", | |
1805 | tuners->cpu_rush_threshold); | |
1806 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_rush_tlp_times = %d\n", | |
1807 | tuners->cpu_rush_tlp_times); | |
1808 | pr_debug("cpufreq_gov_dbs_init: dbs_tuners_ins.cpu_rush_avg_times = %d\n", | |
1809 | tuners->cpu_rush_avg_times); | |
1810 | #endif | |
1811 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1812 | ||
1813 | dbs_data->tuners = tuners; | |
1814 | mutex_init(&dbs_data->mutex); | |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | static void hp_exit(struct dbs_data *dbs_data) | |
1819 | { | |
1820 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1821 | #ifdef CONFIG_HOTPLUG_CPU | |
1822 | cancel_delayed_work_sync(&hp_work); | |
1823 | if (hp_wq) | |
1824 | destroy_workqueue(hp_wq); | |
1825 | #endif | |
1826 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1827 | kfree(dbs_data->tuners); | |
1828 | } | |
1829 | ||
1830 | define_get_cpu_dbs_routines(hp_cpu_dbs_info); | |
1831 | ||
1832 | static struct hp_ops hp_ops = { | |
1833 | .powersave_bias_init_cpu = hotplug_powersave_bias_init_cpu, | |
1834 | .powersave_bias_target = generic_powersave_bias_target, | |
1835 | .freq_increase = dbs_freq_increase, | |
1836 | .input_handler = &dbs_input_handler, | |
1837 | }; | |
1838 | ||
1839 | static struct common_dbs_data hp_dbs_cdata = { | |
1840 | .governor = GOV_HOTPLUG, | |
1841 | .attr_group_gov_sys = &hp_attr_group_gov_sys, | |
1842 | .attr_group_gov_pol = &hp_attr_group_gov_pol, | |
1843 | .get_cpu_cdbs = get_cpu_cdbs, | |
1844 | .get_cpu_dbs_info_s = get_cpu_dbs_info_s, | |
1845 | .gov_dbs_timer = hp_dbs_timer, | |
1846 | .gov_check_cpu = hp_check_cpu, | |
1847 | .gov_ops = &hp_ops, | |
1848 | .init = hp_init, | |
1849 | .exit = hp_exit, | |
1850 | }; | |
1851 | ||
1852 | static void hp_set_powersave_bias(unsigned int powersave_bias) | |
1853 | { | |
1854 | struct cpufreq_policy *policy; | |
1855 | struct dbs_data *dbs_data; | |
1856 | struct hp_dbs_tuners *hp_tuners; | |
1857 | unsigned int cpu; | |
1858 | cpumask_t done; | |
1859 | ||
1860 | default_powersave_bias = powersave_bias; | |
1861 | cpumask_clear(&done); | |
1862 | ||
1863 | get_online_cpus(); | |
1864 | for_each_online_cpu(cpu) { | |
1865 | if (cpumask_test_cpu(cpu, &done)) | |
1866 | continue; | |
1867 | ||
1868 | policy = per_cpu(hp_cpu_dbs_info, cpu).cdbs.cur_policy; | |
1869 | if (!policy) | |
1870 | continue; | |
1871 | ||
1872 | cpumask_or(&done, &done, policy->cpus); | |
1873 | ||
1874 | if (policy->governor != &cpufreq_gov_hotplug) | |
1875 | continue; | |
1876 | ||
1877 | dbs_data = policy->governor_data; | |
1878 | hp_tuners = dbs_data->tuners; | |
1879 | hp_tuners->powersave_bias = default_powersave_bias; | |
1880 | } | |
1881 | put_online_cpus(); | |
1882 | } | |
1883 | ||
1884 | void hp_register_powersave_bias_handler(unsigned int (*f) | |
1885 | (struct cpufreq_policy *, unsigned int, unsigned int), | |
1886 | unsigned int powersave_bias) | |
1887 | { | |
1888 | hp_ops.powersave_bias_target = f; | |
1889 | hp_set_powersave_bias(powersave_bias); | |
1890 | } | |
1891 | EXPORT_SYMBOL_GPL(hp_register_powersave_bias_handler); | |
1892 | ||
1893 | void hp_unregister_powersave_bias_handler(void) | |
1894 | { | |
1895 | hp_ops.powersave_bias_target = generic_powersave_bias_target; | |
1896 | hp_set_powersave_bias(0); | |
1897 | } | |
1898 | EXPORT_SYMBOL_GPL(hp_unregister_powersave_bias_handler); | |
1899 | ||
1900 | static int hp_cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event) | |
1901 | { | |
1902 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1903 | struct dbs_data *dbs_data; | |
1904 | int rc = 0; | |
1905 | ||
1906 | if (have_governor_per_policy()) | |
1907 | dbs_data = policy->governor_data; | |
1908 | else | |
1909 | dbs_data = hp_dbs_cdata.gdbs_data; | |
1910 | ||
1911 | /* pr_emerg("***** policy->cpu: %d, event: %u, smp_processor_id: %d, have_governor_per_policy: %d *****\n", policy->cpu, event, smp_processor_id(), have_governor_per_policy()); */ | |
1912 | switch (event) { | |
1913 | case CPUFREQ_GOV_START: | |
1914 | #ifdef DEBUG_LOG | |
1915 | { | |
1916 | struct hp_dbs_tuners *hp_tuners = dbs_data->tuners; | |
1917 | ||
1918 | BUG_ON(NULL == dbs_data); | |
1919 | BUG_ON(NULL == dbs_data->tuners); | |
1920 | ||
1921 | pr_debug("cpufreq_governor_dbs: min_sampling_rate = %d\n", | |
1922 | dbs_data->min_sampling_rate); | |
1923 | pr_debug("cpufreq_governor_dbs: dbs_tuners_ins.sampling_rate = %d\n", | |
1924 | hp_tuners->sampling_rate); | |
1925 | pr_debug("cpufreq_governor_dbs: dbs_tuners_ins.io_is_busy = %d\n", | |
1926 | hp_tuners->io_is_busy); | |
1927 | } | |
1928 | #endif | |
1929 | #ifdef CONFIG_HOTPLUG_CPU | |
1930 | if (0) /* (!policy->cpu) // <-XXX */ | |
1931 | rc = input_register_handler(&dbs_input_handler); | |
1932 | #endif | |
1933 | break; | |
1934 | ||
1935 | case CPUFREQ_GOV_STOP: | |
1936 | #ifdef CONFIG_HOTPLUG_CPU | |
1937 | if (0) /* (!policy->cpu) // <-XXX */ | |
1938 | input_unregister_handler(&dbs_input_handler); | |
1939 | ||
1940 | #endif | |
1941 | break; | |
1942 | } | |
1943 | ||
1944 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1945 | return cpufreq_governor_dbs(policy, &hp_dbs_cdata, event); | |
1946 | } | |
1947 | ||
1948 | /* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */ | |
1949 | #if 0 | |
1950 | int cpufreq_gov_dbs_get_sum_load(void) | |
1951 | { | |
1952 | return g_cpus_sum_load_current; | |
1953 | } | |
1954 | #endif | |
1955 | /* >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> */ | |
1956 | ||
1957 | #ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_HOTPLUG | |
1958 | static | |
1959 | #endif | |
1960 | struct cpufreq_governor cpufreq_gov_hotplug = { | |
1961 | .name = "hotplug", | |
1962 | .governor = hp_cpufreq_governor_dbs, | |
1963 | .max_transition_latency = TRANSITION_LATENCY_LIMIT, | |
1964 | .owner = THIS_MODULE, | |
1965 | }; | |
1966 | ||
1967 | #ifdef CONFIG_MTK_SDIOAUTOK_SUPPORT | |
1968 | void cpufreq_min_sampling_rate_change(unsigned int sample_rate) | |
1969 | { | |
1970 | struct dbs_data *dbs_data = per_cpu(hp_cpu_dbs_info, 0).cdbs.cur_policy->governor_data; /* TODO: FIXME, cpu = 0 */ | |
1971 | ||
1972 | if (!dbs_data) | |
1973 | return; | |
1974 | ||
1975 | dbs_data->min_sampling_rate = sample_rate; | |
1976 | update_sampling_rate(dbs_data, sample_rate); | |
1977 | } | |
1978 | EXPORT_SYMBOL(cpufreq_min_sampling_rate_change); | |
1979 | #endif | |
1980 | ||
1981 | static int __init cpufreq_gov_dbs_init(void) | |
1982 | { | |
1983 | struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; | |
1984 | ||
1985 | freq_up_task = kthread_create(touch_freq_up_task, NULL, "touch_freq_up_task"); | |
1986 | ||
1987 | if (IS_ERR(freq_up_task)) | |
1988 | return PTR_ERR(freq_up_task); | |
1989 | ||
1990 | sched_setscheduler_nocheck(freq_up_task, SCHED_FIFO, ¶m); | |
1991 | get_task_struct(freq_up_task); | |
1992 | ||
1993 | return cpufreq_register_governor(&cpufreq_gov_hotplug); | |
1994 | } | |
1995 | ||
1996 | static void __exit cpufreq_gov_dbs_exit(void) | |
1997 | { | |
1998 | cpufreq_unregister_governor(&cpufreq_gov_hotplug); | |
1999 | ||
2000 | kthread_stop(freq_up_task); | |
2001 | put_task_struct(freq_up_task); | |
2002 | } | |
2003 | ||
2004 | MODULE_AUTHOR("Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>"); | |
2005 | MODULE_AUTHOR("Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>"); | |
2006 | MODULE_DESCRIPTION("'cpufreq_hotplug' - A dynamic cpufreq governor for " | |
2007 | "Low Latency Frequency Transition capable processors"); | |
2008 | MODULE_LICENSE("GPL"); | |
2009 | ||
2010 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_HOTPLUG | |
2011 | fs_initcall(cpufreq_gov_dbs_init); | |
2012 | #else | |
2013 | module_init(cpufreq_gov_dbs_init); | |
2014 | #endif | |
2015 | module_exit(cpufreq_gov_dbs_exit); |