rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2019 MediaTek Inc. |
| 3 | * |
| 4 | * This program is free software: you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/sched/clock.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/cpuhotplug.h> |
| 17 | #include <linux/cpu.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/notifier.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/irq.h> |
| 22 | #if 0 /* fix me later, no such file on current tree */ |
| 23 | #include <mach/mt_cpuxgpt.h> |
| 24 | #endif |
| 25 | #include <asm/arch_timer.h> |
| 26 | |
| 27 | #define MET_USER_EVENT_SUPPORT |
| 28 | #include "interface.h" |
| 29 | #include "sampler.h" |
| 30 | #include "met_struct.h" |
| 31 | #include "util.h" |
| 32 | #include "switch.h" |
| 33 | #include "trace.h" |
| 34 | #include "met_drv.h" |
| 35 | #include "met_tag.h" /* for tracing_mark_write */ |
| 36 | |
| 37 | #include "cpu_pmu.h" /* for using kernel perf PMU driver */ |
| 38 | |
| 39 | #include "met_kernel_symbol.h" |
| 40 | |
| 41 | #undef DEBUG_CPU_NOTIFY |
| 42 | /* #define DEBUG_CPU_NOTIFY */ |
| 43 | #if defined(DEBUG_CPU_NOTIFY) |
| 44 | #ifdef CONFIG_MET_MODULE |
| 45 | #define dbg_met_tag_oneshot met_tag_oneshot_real |
| 46 | #else |
| 47 | #define dbg_met_tag_oneshot met_tag_oneshot |
| 48 | #endif /* CONFIG_MET_MODULE */ |
| 49 | #else |
| 50 | #define dbg_met_tag_oneshot(class_id, name, value) ({ 0; }) |
| 51 | #endif |
| 52 | |
| 53 | static int start; |
| 54 | static unsigned int online_cpu_map; |
| 55 | static int curr_polling_cpu; |
| 56 | static int cpu_related_cnt; |
| 57 | static int cpu_related_polling_hdlr_cnt; |
| 58 | |
| 59 | static int preferred_cpu_list[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; |
| 60 | |
| 61 | static int calc_preferred_polling_cpu(unsigned int cpu_map) |
| 62 | { |
| 63 | int i; |
| 64 | |
| 65 | for (i = 0; i < ARRAY_SIZE(preferred_cpu_list); i++) { |
| 66 | if (cpu_map & (1 << preferred_cpu_list[i])) |
| 67 | return preferred_cpu_list[i]; |
| 68 | } |
| 69 | |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | static void wq_sync_buffer(struct work_struct *work) |
| 74 | { |
| 75 | int cpu; |
| 76 | struct delayed_work *dw = container_of(work, struct delayed_work, work); |
| 77 | struct met_cpu_struct *met_cpu_ptr = container_of(dw, struct met_cpu_struct, dwork); |
| 78 | |
| 79 | cpu = smp_processor_id(); |
| 80 | if (met_cpu_ptr->cpu != cpu) { |
| 81 | /* panic("ERROR"); */ |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | /* sync_samples(cpu); */ |
| 86 | /* don't re-add the work if we're shutting down */ |
| 87 | if (met_cpu_ptr->work_enabled) |
| 88 | schedule_delayed_work(dw, DEFAULT_TIMER_EXPIRE); |
| 89 | } |
| 90 | |
| 91 | static enum hrtimer_restart met_hrtimer_notify(struct hrtimer *hrtimer) |
| 92 | { |
| 93 | int cpu; |
| 94 | int *count; |
| 95 | unsigned long long stamp; |
| 96 | struct met_cpu_struct *met_cpu_ptr = container_of(hrtimer, struct met_cpu_struct, hrtimer); |
| 97 | struct metdevice *c; |
| 98 | #if defined(DEBUG_CPU_NOTIFY) |
| 99 | char msg[32]; |
| 100 | #endif |
| 101 | |
| 102 | cpu = smp_processor_id(); |
| 103 | #if defined(DEBUG_CPU_NOTIFY) |
| 104 | { |
| 105 | char msg[32]; |
| 106 | |
| 107 | snprintf(msg, sizeof(msg), "met_hrtimer notify_%d", cpu); |
| 108 | dbg_met_tag_oneshot(0, msg, 1); |
| 109 | } |
| 110 | #endif |
| 111 | |
| 112 | if (met_cpu_ptr->cpu != cpu) { |
| 113 | /* panic("ERROR2"); */ |
| 114 | dbg_met_tag_oneshot(0, msg, -3); |
| 115 | return HRTIMER_NORESTART; |
| 116 | } |
| 117 | |
| 118 | list_for_each_entry(c, &met_list, list) { |
| 119 | if (c->ondiemet_mode == 0) { |
| 120 | if ((c->mode == 0) || (c->timed_polling == NULL)) |
| 121 | continue; |
| 122 | } else if (c->ondiemet_mode == 1) { |
| 123 | if ((c->mode == 0) || (c->ondiemet_timed_polling == NULL)) |
| 124 | continue; |
| 125 | } else if (c->ondiemet_mode == 2) { |
| 126 | if ((c->mode == 0) || ((c->timed_polling == NULL) |
| 127 | && (c->ondiemet_timed_polling == NULL))) |
| 128 | continue; |
| 129 | } |
| 130 | |
| 131 | count = per_cpu_ptr(c->polling_count, cpu); |
| 132 | if ((*count) > 0) { |
| 133 | (*count)--; |
| 134 | continue; |
| 135 | } |
| 136 | |
| 137 | *(count) = c->polling_count_reload; |
| 138 | |
| 139 | stamp = cpu_clock(cpu); |
| 140 | |
| 141 | if (c->cpu_related == 0) { |
| 142 | if (cpu == curr_polling_cpu) { |
| 143 | if (c->ondiemet_mode == 0) { |
| 144 | c->timed_polling(stamp, 0); |
| 145 | } else if (c->ondiemet_mode == 1) { |
| 146 | c->ondiemet_timed_polling(stamp, 0); |
| 147 | } else if (c->ondiemet_mode == 2) { |
| 148 | if (c->timed_polling) |
| 149 | c->timed_polling(stamp, 0); |
| 150 | if (c->ondiemet_timed_polling) |
| 151 | c->ondiemet_timed_polling(stamp, 0); |
| 152 | } |
| 153 | } |
| 154 | } else { |
| 155 | if (c->ondiemet_mode == 0) { |
| 156 | c->timed_polling(stamp, cpu); |
| 157 | } else if (c->ondiemet_mode == 1) { |
| 158 | c->ondiemet_timed_polling(stamp, cpu); |
| 159 | } else if (c->ondiemet_mode == 2) { |
| 160 | if (c->timed_polling) |
| 161 | c->timed_polling(stamp, 0); |
| 162 | if (c->ondiemet_timed_polling) |
| 163 | c->ondiemet_timed_polling(stamp, 0); |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (met_cpu_ptr->hrtimer_online_check) { |
| 169 | online_cpu_map |= (1 << cpu); |
| 170 | met_cpu_ptr->hrtimer_online_check = 0; |
| 171 | dbg_met_tag_oneshot(0, "met_online check done", cpu); |
| 172 | if (calc_preferred_polling_cpu(online_cpu_map) == cpu) { |
| 173 | curr_polling_cpu = cpu; |
| 174 | dbg_met_tag_oneshot(0, "met_curr polling cpu", cpu); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | if (met_cpu_ptr->work_enabled) { |
| 179 | hrtimer_forward_now(hrtimer, ns_to_ktime(DEFAULT_HRTIMER_EXPIRE)); |
| 180 | dbg_met_tag_oneshot(0, msg, 0); |
| 181 | return HRTIMER_RESTART; |
| 182 | } |
| 183 | dbg_met_tag_oneshot(0, msg, 0); |
| 184 | return HRTIMER_NORESTART; |
| 185 | } |
| 186 | |
| 187 | static void __met_init_cpu_related_device(void *unused) |
| 188 | { |
| 189 | struct metdevice *c; |
| 190 | |
| 191 | list_for_each_entry(c, &met_list, list) { |
| 192 | *(this_cpu_ptr(c->polling_count)) = 0; |
| 193 | if (c->ondiemet_mode == 0) { |
| 194 | if ((c->cpu_related) && (c->mode) && (c->start)) |
| 195 | c->start(); |
| 196 | } else if (c->ondiemet_mode == 1) { |
| 197 | if (((c->cpu_related)) && (c->mode) && (c->ondiemet_start)) |
| 198 | c->ondiemet_start(); |
| 199 | } else if (c->ondiemet_mode == 2) { |
| 200 | if ((c->cpu_related) && (c->mode) && (c->start)) |
| 201 | c->start(); |
| 202 | if (((c->cpu_related)) && (c->mode) && (c->ondiemet_start)) |
| 203 | c->ondiemet_start(); |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | static void __met_hrtimer_register(void *unused) |
| 209 | { |
| 210 | struct met_cpu_struct *met_cpu_ptr = NULL; |
| 211 | struct hrtimer *hrtimer = NULL; |
| 212 | /* struct delayed_work *dw; */ |
| 213 | /*struct metdevice *c;*/ |
| 214 | |
| 215 | met_cpu_ptr = this_cpu_ptr(&met_cpu); |
| 216 | #if defined(DEBUG_CPU_NOTIFY) |
| 217 | { |
| 218 | char msg[32]; |
| 219 | |
| 220 | snprintf(msg, sizeof(msg), "met_hrtimer status_%d", met_cpu_ptr->cpu); |
| 221 | dbg_met_tag_oneshot(0, msg, 1); |
| 222 | } |
| 223 | #endif |
| 224 | /* |
| 225 | * do not open HRtimer when EVENT timer enable |
| 226 | */ |
| 227 | if (!(met_switch.mode & MT_SWITCH_EVENT_TIMER)) { |
| 228 | |
| 229 | hrtimer = &met_cpu_ptr->hrtimer; |
| 230 | hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 231 | hrtimer->function = met_hrtimer_notify; |
| 232 | |
| 233 | if (DEFAULT_HRTIMER_EXPIRE) { |
| 234 | met_cpu_ptr->work_enabled = 1; |
| 235 | /* schedule_delayed_work_on(smp_processor_id(), dw, DEFAULT_TIMER_EXPIRE); */ |
| 236 | hrtimer_start(hrtimer, ns_to_ktime(DEFAULT_HRTIMER_EXPIRE), |
| 237 | HRTIMER_MODE_REL_PINNED); |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | static void __met_hrtimer_stop(void *unused) |
| 243 | { |
| 244 | struct met_cpu_struct *met_cpu_ptr; |
| 245 | struct hrtimer *hrtimer; |
| 246 | /* struct delayed_work *dw; */ |
| 247 | struct metdevice *c; |
| 248 | |
| 249 | met_cpu_ptr = this_cpu_ptr(&met_cpu); |
| 250 | #if defined(DEBUG_CPU_NOTIFY) |
| 251 | { |
| 252 | char msg[32]; |
| 253 | |
| 254 | snprintf(msg, sizeof(msg), "met_hrtimer status_%d", met_cpu_ptr->cpu); |
| 255 | dbg_met_tag_oneshot(0, msg, 0); |
| 256 | } |
| 257 | #endif |
| 258 | /* |
| 259 | * do not open HRtimer when EVENT timer enable |
| 260 | */ |
| 261 | if (!(met_switch.mode & MT_SWITCH_EVENT_TIMER)) { |
| 262 | hrtimer = &met_cpu_ptr->hrtimer; |
| 263 | /* dw = &met_cpu_ptr->dwork; */ |
| 264 | |
| 265 | met_cpu_ptr->work_enabled = 0; |
| 266 | hrtimer_cancel(hrtimer); |
| 267 | |
| 268 | /* cancel_delayed_work_sync(dw); */ |
| 269 | } |
| 270 | list_for_each_entry(c, &met_list, list) { |
| 271 | if (c->ondiemet_mode == 0) { |
| 272 | if ((c->cpu_related) && (c->mode) && (c->stop)) |
| 273 | c->stop(); |
| 274 | } else if (c->ondiemet_mode == 1) { |
| 275 | if ((c->cpu_related) && (c->mode) && (c->ondiemet_stop)) |
| 276 | c->ondiemet_stop(); |
| 277 | } else if (c->ondiemet_mode == 2) { |
| 278 | if ((c->cpu_related) && (c->mode) && (c->stop)) |
| 279 | c->stop(); |
| 280 | if ((c->cpu_related) && (c->mode) && (c->ondiemet_stop)) |
| 281 | c->ondiemet_stop(); |
| 282 | } |
| 283 | *(this_cpu_ptr(c->polling_count)) = 0; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | static int met_pmu_cpu_notify(enum met_action action, unsigned int cpu) |
| 288 | { |
| 289 | struct met_cpu_struct *met_cpu_ptr; |
| 290 | struct delayed_work *dw; |
| 291 | int preferred_polling_cpu; |
| 292 | struct metdevice *c; |
| 293 | |
| 294 | if (start == 0) |
| 295 | return NOTIFY_OK; |
| 296 | |
| 297 | #if defined(DEBUG_CPU_NOTIFY) |
| 298 | { |
| 299 | char msg[32]; |
| 300 | |
| 301 | snprintf(msg, sizeof(msg), "met_cpu notify_%d", cpu); |
| 302 | dbg_met_tag_oneshot(0, msg, action); |
| 303 | } |
| 304 | #elif defined(PR_CPU_NOTIFY) |
| 305 | { |
| 306 | char msg[32]; |
| 307 | |
| 308 | if (met_cpu_notify) { |
| 309 | snprintf(msg, sizeof(msg), "met_cpu notify_%d", cpu); |
| 310 | dbg_met_tag_oneshot(0, msg, action); |
| 311 | } |
| 312 | } |
| 313 | #endif |
| 314 | |
| 315 | if (cpu < 0 || cpu >= NR_CPUS) |
| 316 | return NOTIFY_OK; |
| 317 | |
| 318 | switch (action) { |
| 319 | case MET_CPU_ONLINE: |
| 320 | met_cpu_ptr = &per_cpu(met_cpu, cpu); |
| 321 | met_cpu_ptr->hrtimer_online_check = 1; |
| 322 | dbg_met_tag_oneshot(0, "met_online check", cpu); |
| 323 | |
| 324 | if (cpu_related_cnt == 0) { |
| 325 | /*pr_info("%s, %d: curr_polling_cpu is alive = %d\n", |
| 326 | * __func__, __LINE__, online_cpu_map & (1 << curr_polling_cpu)); |
| 327 | */ |
| 328 | |
| 329 | online_cpu_map |= (1 << cpu); |
| 330 | |
| 331 | /* check curr_polling_cpu is alive, if it is down, |
| 332 | * start current cpu hrtimer, and change it to be currr_pollling_cpu |
| 333 | */ |
| 334 | if ((online_cpu_map & (1 << curr_polling_cpu)) == 0) { |
| 335 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_register, NULL, 1); |
| 336 | curr_polling_cpu = cpu; |
| 337 | } |
| 338 | } else { |
| 339 | if (cpu_related_polling_hdlr_cnt) { |
| 340 | met_smp_call_function_single_symbol(cpu, __met_init_cpu_related_device, NULL, 1); |
| 341 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_register, NULL, 1); |
| 342 | } else { |
| 343 | |
| 344 | /*pr_info("%s, %d: curr_polling_cpu is alive = %d\n", |
| 345 | * __func__, __LINE__, online_cpu_map & (1 << curr_polling_cpu)); |
| 346 | */ |
| 347 | |
| 348 | online_cpu_map |= (1 << cpu); |
| 349 | |
| 350 | /* check curr_polling_cpu is alive, if it is down, |
| 351 | * start current cpu hrtimer, and change it to be currr_pollling_cpu |
| 352 | */ |
| 353 | if ((online_cpu_map & (1 << curr_polling_cpu)) == 0) { |
| 354 | met_smp_call_function_single_symbol(cpu, __met_init_cpu_related_device, NULL, 1); |
| 355 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_register, NULL, 1); |
| 356 | curr_polling_cpu = cpu; |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | #ifdef CONFIG_CPU_FREQ |
| 362 | force_power_log(cpu); |
| 363 | #endif |
| 364 | list_for_each_entry(c, &met_list, list) { |
| 365 | if (c->cpu_state_notify) |
| 366 | c->cpu_state_notify(cpu, action); |
| 367 | } |
| 368 | break; |
| 369 | |
| 370 | case MET_CPU_OFFLINE: |
| 371 | list_for_each_entry(c, &met_list, list) { |
| 372 | if (c->cpu_state_notify) |
| 373 | c->cpu_state_notify(cpu, action); |
| 374 | } |
| 375 | |
| 376 | online_cpu_map &= ~(1 << cpu); |
| 377 | dbg_met_tag_oneshot(0, "met_offline cpu", cpu); |
| 378 | if (cpu == curr_polling_cpu) { |
| 379 | /* pr_info("%s, %d: curr_polling_cpu %d is down\n", |
| 380 | * __func__, __LINE__, curr_polling_cpu); |
| 381 | */ |
| 382 | preferred_polling_cpu = calc_preferred_polling_cpu(online_cpu_map); |
| 383 | /* pr_info("%s, %d: preferred_polling_cpu = %d\n", |
| 384 | * __func__, __LINE__, preferred_polling_cpu); |
| 385 | */ |
| 386 | if (preferred_polling_cpu != -1) { |
| 387 | curr_polling_cpu = preferred_polling_cpu; |
| 388 | dbg_met_tag_oneshot(0, "met_curr polling cpu", curr_polling_cpu); |
| 389 | |
| 390 | if (cpu_related_cnt == 0) { |
| 391 | /* pr_info("%s, %d: start cpu %d hrtimer start\n", |
| 392 | * __func__, __LINE__, curr_polling_cpu); |
| 393 | */ |
| 394 | met_smp_call_function_single_symbol(curr_polling_cpu, __met_hrtimer_register, NULL, 1); |
| 395 | } else if (cpu_related_polling_hdlr_cnt == 0) { |
| 396 | met_smp_call_function_single_symbol(curr_polling_cpu, __met_hrtimer_register, NULL, 1); |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_stop, NULL, 1); |
| 402 | |
| 403 | met_cpu_ptr = &per_cpu(met_cpu, cpu); |
| 404 | dw = &met_cpu_ptr->dwork; |
| 405 | cancel_delayed_work_sync(dw); |
| 406 | |
| 407 | /* sync_samples(cpu); */ |
| 408 | break; |
| 409 | default: |
| 410 | list_for_each_entry(c, &met_list, list) { |
| 411 | if (c->cpu_state_notify) |
| 412 | c->cpu_state_notify(cpu, action); |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | return NOTIFY_OK; |
| 417 | } |
| 418 | |
| 419 | static int _met_pmu_cpu_notify_online(unsigned int cpu) |
| 420 | { |
| 421 | met_pmu_cpu_notify(MET_CPU_ONLINE, cpu); |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int _met_pmu_cpu_notify_offline(unsigned int cpu) |
| 427 | { |
| 428 | met_pmu_cpu_notify(MET_CPU_OFFLINE, cpu); |
| 429 | |
| 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | int sampler_start(void) |
| 434 | { |
| 435 | int ret, cpu; |
| 436 | struct met_cpu_struct *met_cpu_ptr; |
| 437 | struct metdevice *c; |
| 438 | int preferred_polling_cpu; |
| 439 | |
| 440 | met_set_suspend_notify(0); |
| 441 | |
| 442 | #ifdef CONFIG_CPU_FREQ |
| 443 | force_power_log(POWER_LOG_ALL); |
| 444 | #endif |
| 445 | |
| 446 | for_each_possible_cpu(cpu) { |
| 447 | met_cpu_ptr = &per_cpu(met_cpu, cpu); |
| 448 | met_cpu_ptr->work_enabled = 0; |
| 449 | met_cpu_ptr->hrtimer_online_check = 0; |
| 450 | hrtimer_init(&met_cpu_ptr->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 451 | met_cpu_ptr->hrtimer.function = met_hrtimer_notify; |
| 452 | INIT_DELAYED_WORK(&met_cpu_ptr->dwork, wq_sync_buffer); |
| 453 | } |
| 454 | |
| 455 | start = 0; |
| 456 | ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, |
| 457 | "met:online", |
| 458 | _met_pmu_cpu_notify_online, |
| 459 | _met_pmu_cpu_notify_offline); |
| 460 | |
| 461 | list_for_each_entry(c, &met_list, list) { |
| 462 | |
| 463 | if (try_module_get(c->owner) == 0) |
| 464 | continue; |
| 465 | |
| 466 | if ((c->mode) && (c->cpu_related == 1)) { |
| 467 | cpu_related_cnt = 1; |
| 468 | |
| 469 | if (c->ondiemet_mode == 0) { |
| 470 | if (c->timed_polling) |
| 471 | cpu_related_polling_hdlr_cnt = 1; |
| 472 | } else if (c->ondiemet_mode == 1) { |
| 473 | if (c->ondiemet_timed_polling) |
| 474 | cpu_related_polling_hdlr_cnt = 1; |
| 475 | } else if (c->ondiemet_mode == 2) { |
| 476 | if (c->timed_polling || c->ondiemet_timed_polling) |
| 477 | cpu_related_polling_hdlr_cnt = 1; |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | if (c->ondiemet_mode == 0) { |
| 482 | if ((!(c->cpu_related)) && (c->mode) && (c->start)) |
| 483 | c->start(); |
| 484 | else if ((c->cpu_related) && (c->mode) && (c->uniq_start)) |
| 485 | c->uniq_start(); |
| 486 | } else if (c->ondiemet_mode == 1) { |
| 487 | if ((!(c->cpu_related)) && (c->mode) && (c->ondiemet_start)) |
| 488 | c->ondiemet_start(); |
| 489 | if ((c->cpu_related) && (c->mode) && (c->uniq_ondiemet_start)) |
| 490 | c->uniq_ondiemet_start(); |
| 491 | } else if (c->ondiemet_mode == 2) { |
| 492 | if ((!(c->cpu_related)) && (c->mode) && (c->start)) |
| 493 | c->start(); |
| 494 | else if ((c->cpu_related) && (c->mode) && (c->uniq_start)) |
| 495 | c->uniq_start(); |
| 496 | |
| 497 | if ((!(c->cpu_related)) && (c->mode) && (c->ondiemet_start)) |
| 498 | c->ondiemet_start(); |
| 499 | else if ((c->cpu_related) && (c->mode) && (c->uniq_ondiemet_start)) |
| 500 | c->uniq_ondiemet_start(); |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | get_online_cpus(); |
| 505 | online_cpu_map = 0; |
| 506 | for_each_online_cpu(cpu) { |
| 507 | online_cpu_map |= (1 << cpu); |
| 508 | } |
| 509 | dbg_met_tag_oneshot(0, "met_online cpu map", online_cpu_map); |
| 510 | preferred_polling_cpu = calc_preferred_polling_cpu(online_cpu_map); |
| 511 | if (preferred_polling_cpu != -1) |
| 512 | curr_polling_cpu = preferred_polling_cpu; |
| 513 | dbg_met_tag_oneshot(0, "met_curr polling cpu", curr_polling_cpu); |
| 514 | start = 1; |
| 515 | |
| 516 | if (cpu_related_cnt == 0) { |
| 517 | met_smp_call_function_single_symbol(curr_polling_cpu, __met_hrtimer_register, NULL, 1); |
| 518 | } |
| 519 | else { |
| 520 | //on_each_cpu(__met_hrtimer_start, NULL, 1); |
| 521 | for_each_online_cpu(cpu) { |
| 522 | met_smp_call_function_single_symbol(cpu, __met_init_cpu_related_device, NULL, 1); |
| 523 | } |
| 524 | |
| 525 | if (cpu_related_polling_hdlr_cnt) { |
| 526 | for_each_online_cpu(cpu) { |
| 527 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_register, NULL, 1); |
| 528 | } |
| 529 | } else { |
| 530 | met_smp_call_function_single_symbol(curr_polling_cpu, __met_hrtimer_register, NULL, 1); |
| 531 | } |
| 532 | } |
| 533 | put_online_cpus(); |
| 534 | |
| 535 | return ret; |
| 536 | } |
| 537 | |
| 538 | void sampler_stop(void) |
| 539 | { |
| 540 | int cpu; |
| 541 | struct met_cpu_struct *met_cpu_ptr; |
| 542 | struct metdevice *c; |
| 543 | struct delayed_work *dw; |
| 544 | |
| 545 | |
| 546 | get_online_cpus(); |
| 547 | //on_each_cpu(__met_hrtimer_stop, NULL, 1); |
| 548 | online_cpu_map = 0; |
| 549 | for_each_online_cpu(cpu) { |
| 550 | online_cpu_map |= (1 << cpu); |
| 551 | } |
| 552 | |
| 553 | for_each_online_cpu(cpu) { |
| 554 | met_smp_call_function_single_symbol(cpu, __met_hrtimer_stop, NULL, 1); |
| 555 | } |
| 556 | |
| 557 | /* for_each_online_cpu(cpu) { */ |
| 558 | for_each_possible_cpu(cpu) { /* Just for case */ |
| 559 | met_cpu_ptr = &per_cpu(met_cpu, cpu); |
| 560 | dw = &met_cpu_ptr->dwork; |
| 561 | cancel_delayed_work_sync(dw); |
| 562 | /* sync_samples(cpu); */ |
| 563 | } |
| 564 | start = 0; |
| 565 | put_online_cpus(); |
| 566 | |
| 567 | cpuhp_remove_state_nocalls(CPUHP_AP_ONLINE_DYN); |
| 568 | |
| 569 | list_for_each_entry(c, &met_list, list) { |
| 570 | if (c->ondiemet_mode == 0) { |
| 571 | if ((!(c->cpu_related)) && (c->mode) && (c->stop)) |
| 572 | c->stop(); |
| 573 | else if ((c->cpu_related) && (c->mode) && (c->uniq_stop)) |
| 574 | c->uniq_stop(); |
| 575 | } else if (c->ondiemet_mode == 1) { |
| 576 | if ((!(c->cpu_related)) && (c->mode) && (c->ondiemet_stop)) |
| 577 | c->ondiemet_stop(); |
| 578 | else if ((c->cpu_related) && (c->mode) && (c->uniq_ondiemet_stop)) |
| 579 | c->uniq_ondiemet_stop(); |
| 580 | } else if (c->ondiemet_mode == 2) { |
| 581 | if ((!(c->cpu_related)) && (c->mode) && (c->stop)) |
| 582 | c->stop(); |
| 583 | else if ((c->cpu_related) && (c->mode) && (c->uniq_stop)) |
| 584 | c->uniq_stop(); |
| 585 | |
| 586 | if ((!(c->cpu_related)) && (c->mode) && (c->ondiemet_stop)) |
| 587 | c->ondiemet_stop(); |
| 588 | else if ((c->cpu_related) && (c->mode) && (c->uniq_ondiemet_stop)) |
| 589 | c->uniq_ondiemet_stop(); |
| 590 | } |
| 591 | module_put(c->owner); |
| 592 | } |
| 593 | |
| 594 | cpu_related_cnt = 0; |
| 595 | cpu_related_polling_hdlr_cnt = 0; |
| 596 | } |
| 597 | |
| 598 | #if 0 /* cann't use static now */ |
| 599 | enum { |
| 600 | MET_SUSPEND = 1, |
| 601 | MET_RESUME = 2, |
| 602 | }; |
| 603 | |
| 604 | static noinline void tracing_mark_write(int op) |
| 605 | { |
| 606 | switch (op) { |
| 607 | case MET_SUSPEND: |
| 608 | MET_TRACE("C|0|MET_SUSPEND|1"); |
| 609 | break; |
| 610 | case MET_RESUME: |
| 611 | MET_TRACE("C|0|MET_SUSPEND|0"); |
| 612 | break; |
| 613 | } |
| 614 | } |
| 615 | #endif |
| 616 | |
| 617 | int met_hrtimer_suspend(void) |
| 618 | { |
| 619 | struct metdevice *c; |
| 620 | |
| 621 | met_set_suspend_notify(1); |
| 622 | /* tracing_mark_write(MET_SUSPEND); */ |
| 623 | tracing_mark_write(TYPE_MET_SUSPEND, 0, 0, 0, 0, 0); |
| 624 | if (start == 0) |
| 625 | return 0; |
| 626 | |
| 627 | list_for_each_entry(c, &met_list, list) { |
| 628 | if (c->suspend) |
| 629 | c->suspend(); |
| 630 | } |
| 631 | |
| 632 | /* get current COUNT */ |
| 633 | MET_TRACE("TS: %llu GPT: %llX", sched_clock(), arch_counter_get_cntvct()); |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | void met_hrtimer_resume(void) |
| 638 | { |
| 639 | struct metdevice *c; |
| 640 | |
| 641 | /* get current COUNT */ |
| 642 | MET_TRACE("TS: %llu GPT: %llX", sched_clock(), arch_counter_get_cntvct()); |
| 643 | |
| 644 | /* tracing_mark_write(MET_RESUME); */ |
| 645 | tracing_mark_write(TYPE_MET_RESUME, 0, 0, 0, 0, 0); |
| 646 | if (start == 0) |
| 647 | return; |
| 648 | |
| 649 | list_for_each_entry(c, &met_list, list) { |
| 650 | if (c->resume) |
| 651 | c->resume(); |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * event timer: |
| 657 | * register IRQ, sched_switch event to monitor Polling count |
| 658 | * count can be printed at any live cpu. |
| 659 | */ |
| 660 | void met_event_timer_notify(void) |
| 661 | { |
| 662 | unsigned long long stamp; |
| 663 | struct metdevice *c; |
| 664 | int cpu = -1; |
| 665 | |
| 666 | if (start == 0) |
| 667 | return; |
| 668 | |
| 669 | cpu = smp_processor_id(); |
| 670 | list_for_each_entry(c, &met_list, list) { |
| 671 | stamp = local_clock(); |
| 672 | |
| 673 | if (c->prev_stamp == 0) |
| 674 | c->prev_stamp = stamp; |
| 675 | |
| 676 | /* Critical Section Start */ |
| 677 | /* try spinlock to prevent a event print twice between config time interval */ |
| 678 | if (!spin_trylock(&(c->my_lock))) |
| 679 | continue; |
| 680 | |
| 681 | /* |
| 682 | * DEFAULT_HRTIMER_EXPIRE (met_hrtimer_expire): |
| 683 | * sample_rate == 0 --> always print |
| 684 | * sample_rate == 1000 --> print interval larger than 1 ms |
| 685 | */ |
| 686 | if (DEFAULT_HRTIMER_EXPIRE == 0 || (stamp - c->prev_stamp) < DEFAULT_HRTIMER_EXPIRE) { |
| 687 | spin_unlock(&(c->my_lock)); |
| 688 | continue; |
| 689 | } |
| 690 | |
| 691 | c->prev_stamp = stamp; |
| 692 | spin_unlock(&(c->my_lock)); |
| 693 | /* Critical Section End */ |
| 694 | |
| 695 | if ((c->mode == 0) || (c->timed_polling == NULL)) |
| 696 | continue; |
| 697 | |
| 698 | stamp = local_clock(); |
| 699 | c->timed_polling(stamp, cpu); |
| 700 | } |
| 701 | } |
| 702 | |