1 /* 2 * sysfs.c - ACPI sysfs interface to userspace. 3 */ 4 5 #include <linux/init.h> 6 #include <linux/kernel.h> 7 #include <linux/moduleparam.h> 8 #include <linux/acpi.h> 9 10 #include "internal.h" 11 12 #define _COMPONENT ACPI_SYSTEM_COMPONENT 13 ACPI_MODULE_NAME("sysfs"); 14 15 #ifdef CONFIG_ACPI_DEBUG 16 /* 17 * ACPI debug sysfs I/F, including: 18 * /sys/modules/acpi/parameters/debug_layer 19 * /sys/modules/acpi/parameters/debug_level 20 * /sys/modules/acpi/parameters/trace_method_name 21 * /sys/modules/acpi/parameters/trace_state 22 * /sys/modules/acpi/parameters/trace_debug_layer 23 * /sys/modules/acpi/parameters/trace_debug_level 24 */ 25 26 struct acpi_dlayer { 27 const char *name; 28 unsigned long value; 29 }; 30 struct acpi_dlevel { 31 const char *name; 32 unsigned long value; 33 }; 34 #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } 35 36 static const struct acpi_dlayer acpi_debug_layers[] = { 37 ACPI_DEBUG_INIT(ACPI_UTILITIES), 38 ACPI_DEBUG_INIT(ACPI_HARDWARE), 39 ACPI_DEBUG_INIT(ACPI_EVENTS), 40 ACPI_DEBUG_INIT(ACPI_TABLES), 41 ACPI_DEBUG_INIT(ACPI_NAMESPACE), 42 ACPI_DEBUG_INIT(ACPI_PARSER), 43 ACPI_DEBUG_INIT(ACPI_DISPATCHER), 44 ACPI_DEBUG_INIT(ACPI_EXECUTER), 45 ACPI_DEBUG_INIT(ACPI_RESOURCES), 46 ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), 47 ACPI_DEBUG_INIT(ACPI_OS_SERVICES), 48 ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), 49 ACPI_DEBUG_INIT(ACPI_COMPILER), 50 ACPI_DEBUG_INIT(ACPI_TOOLS), 51 52 ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), 53 ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), 54 ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), 55 ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), 56 ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), 57 ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), 58 ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), 59 ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), 60 ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), 61 ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), 62 ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), 63 ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), 64 ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), 65 ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), 66 }; 67 68 static const struct acpi_dlevel acpi_debug_levels[] = { 69 ACPI_DEBUG_INIT(ACPI_LV_INIT), 70 ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), 71 ACPI_DEBUG_INIT(ACPI_LV_INFO), 72 ACPI_DEBUG_INIT(ACPI_LV_REPAIR), 73 ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), 74 75 ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), 76 ACPI_DEBUG_INIT(ACPI_LV_PARSE), 77 ACPI_DEBUG_INIT(ACPI_LV_LOAD), 78 ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), 79 ACPI_DEBUG_INIT(ACPI_LV_EXEC), 80 ACPI_DEBUG_INIT(ACPI_LV_NAMES), 81 ACPI_DEBUG_INIT(ACPI_LV_OPREGION), 82 ACPI_DEBUG_INIT(ACPI_LV_BFIELD), 83 ACPI_DEBUG_INIT(ACPI_LV_TABLES), 84 ACPI_DEBUG_INIT(ACPI_LV_VALUES), 85 ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), 86 ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), 87 ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), 88 ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), 89 90 ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), 91 ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), 92 ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), 93 94 ACPI_DEBUG_INIT(ACPI_LV_MUTEX), 95 ACPI_DEBUG_INIT(ACPI_LV_THREADS), 96 ACPI_DEBUG_INIT(ACPI_LV_IO), 97 ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), 98 99 ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), 100 ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), 101 ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), 102 ACPI_DEBUG_INIT(ACPI_LV_EVENTS), 103 }; 104 105 static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) 106 { 107 int result = 0; 108 int i; 109 110 result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); 111 112 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { 113 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", 114 acpi_debug_layers[i].name, 115 acpi_debug_layers[i].value, 116 (acpi_dbg_layer & acpi_debug_layers[i].value) 117 ? '*' : ' '); 118 } 119 result += 120 sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", 121 ACPI_ALL_DRIVERS, 122 (acpi_dbg_layer & ACPI_ALL_DRIVERS) == 123 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS) 124 == 0 ? ' ' : '-'); 125 result += 126 sprintf(buffer + result, 127 "--\ndebug_layer = 0x%08X ( * = enabled)\n", 128 acpi_dbg_layer); 129 130 return result; 131 } 132 133 static int param_get_debug_level(char *buffer, const struct kernel_param *kp) 134 { 135 int result = 0; 136 int i; 137 138 result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); 139 140 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { 141 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", 142 acpi_debug_levels[i].name, 143 acpi_debug_levels[i].value, 144 (acpi_dbg_level & acpi_debug_levels[i].value) 145 ? '*' : ' '); 146 } 147 result += 148 sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n", 149 acpi_dbg_level); 150 151 return result; 152 } 153 154 static const struct kernel_param_ops param_ops_debug_layer = { 155 .set = param_set_uint, 156 .get = param_get_debug_layer, 157 }; 158 159 static const struct kernel_param_ops param_ops_debug_level = { 160 .set = param_set_uint, 161 .get = param_get_debug_level, 162 }; 163 164 module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); 165 module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644); 166 167 static char trace_method_name[1024]; 168 169 int param_set_trace_method_name(const char *val, const struct kernel_param *kp) 170 { 171 u32 saved_flags = 0; 172 bool is_abs_path = true; 173 174 if (*val != '\\') 175 is_abs_path = false; 176 177 if ((is_abs_path && strlen(val) > 1023) || 178 (!is_abs_path && strlen(val) > 1022)) { 179 pr_err("%s: string parameter too long\n", kp->name); 180 return -ENOSPC; 181 } 182 183 /* 184 * It's not safe to update acpi_gbl_trace_method_name without 185 * having the tracer stopped, so we save the original tracer 186 * state and disable it. 187 */ 188 saved_flags = acpi_gbl_trace_flags; 189 (void)acpi_debug_trace(NULL, 190 acpi_gbl_trace_dbg_level, 191 acpi_gbl_trace_dbg_layer, 192 0); 193 194 /* This is a hack. We can't kmalloc in early boot. */ 195 if (is_abs_path) 196 strcpy(trace_method_name, val); 197 else { 198 trace_method_name[0] = '\\'; 199 strcpy(trace_method_name+1, val); 200 } 201 202 /* Restore the original tracer state */ 203 (void)acpi_debug_trace(trace_method_name, 204 acpi_gbl_trace_dbg_level, 205 acpi_gbl_trace_dbg_layer, 206 saved_flags); 207 208 return 0; 209 } 210 211 static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp) 212 { 213 return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name); 214 } 215 216 static const struct kernel_param_ops param_ops_trace_method = { 217 .set = param_set_trace_method_name, 218 .get = param_get_trace_method_name, 219 }; 220 221 static const struct kernel_param_ops param_ops_trace_attrib = { 222 .set = param_set_uint, 223 .get = param_get_uint, 224 }; 225 226 module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644); 227 module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644); 228 module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644); 229 230 static int param_set_trace_state(const char *val, struct kernel_param *kp) 231 { 232 acpi_status status; 233 const char *method = trace_method_name; 234 u32 flags = 0; 235 236 /* So "xxx-once" comparison should go prior than "xxx" comparison */ 237 #define acpi_compare_param(val, key) \ 238 strncmp((val), (key), sizeof(key) - 1) 239 240 if (!acpi_compare_param(val, "enable")) { 241 method = NULL; 242 flags = ACPI_TRACE_ENABLED; 243 } else if (!acpi_compare_param(val, "disable")) 244 method = NULL; 245 else if (!acpi_compare_param(val, "method-once")) 246 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT; 247 else if (!acpi_compare_param(val, "method")) 248 flags = ACPI_TRACE_ENABLED; 249 else if (!acpi_compare_param(val, "opcode-once")) 250 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE; 251 else if (!acpi_compare_param(val, "opcode")) 252 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE; 253 else 254 return -EINVAL; 255 256 status = acpi_debug_trace(method, 257 acpi_gbl_trace_dbg_level, 258 acpi_gbl_trace_dbg_layer, 259 flags); 260 if (ACPI_FAILURE(status)) 261 return -EBUSY; 262 263 return 0; 264 } 265 266 static int param_get_trace_state(char *buffer, struct kernel_param *kp) 267 { 268 if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) 269 return sprintf(buffer, "disable"); 270 else { 271 if (acpi_gbl_trace_method_name) { 272 if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) 273 return sprintf(buffer, "method-once"); 274 else 275 return sprintf(buffer, "method"); 276 } else 277 return sprintf(buffer, "enable"); 278 } 279 return 0; 280 } 281 282 module_param_call(trace_state, param_set_trace_state, param_get_trace_state, 283 NULL, 0644); 284 #endif /* CONFIG_ACPI_DEBUG */ 285 286 287 /* /sys/modules/acpi/parameters/aml_debug_output */ 288 289 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, 290 byte, 0644); 291 MODULE_PARM_DESC(aml_debug_output, 292 "To enable/disable the ACPI Debug Object output."); 293 294 /* /sys/module/acpi/parameters/acpica_version */ 295 static int param_get_acpica_version(char *buffer, struct kernel_param *kp) 296 { 297 int result; 298 299 result = sprintf(buffer, "%x", ACPI_CA_VERSION); 300 301 return result; 302 } 303 304 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); 305 306 /* 307 * ACPI table sysfs I/F: 308 * /sys/firmware/acpi/tables/ 309 * /sys/firmware/acpi/tables/dynamic/ 310 */ 311 312 static LIST_HEAD(acpi_table_attr_list); 313 static struct kobject *tables_kobj; 314 static struct kobject *dynamic_tables_kobj; 315 static struct kobject *hotplug_kobj; 316 317 struct acpi_table_attr { 318 struct bin_attribute attr; 319 char name[8]; 320 int instance; 321 struct list_head node; 322 }; 323 324 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, 325 struct bin_attribute *bin_attr, char *buf, 326 loff_t offset, size_t count) 327 { 328 struct acpi_table_attr *table_attr = 329 container_of(bin_attr, struct acpi_table_attr, attr); 330 struct acpi_table_header *table_header = NULL; 331 acpi_status status; 332 char name[ACPI_NAME_SIZE]; 333 334 if (strncmp(table_attr->name, "NULL", 4)) 335 memcpy(name, table_attr->name, ACPI_NAME_SIZE); 336 else 337 memcpy(name, "\0\0\0\0", 4); 338 339 status = acpi_get_table(name, table_attr->instance, &table_header); 340 if (ACPI_FAILURE(status)) 341 return -ENODEV; 342 343 return memory_read_from_buffer(buf, count, &offset, 344 table_header, table_header->length); 345 } 346 347 static void acpi_table_attr_init(struct acpi_table_attr *table_attr, 348 struct acpi_table_header *table_header) 349 { 350 struct acpi_table_header *header = NULL; 351 struct acpi_table_attr *attr = NULL; 352 353 sysfs_attr_init(&table_attr->attr.attr); 354 if (table_header->signature[0] != '\0') 355 memcpy(table_attr->name, table_header->signature, 356 ACPI_NAME_SIZE); 357 else 358 memcpy(table_attr->name, "NULL", 4); 359 360 list_for_each_entry(attr, &acpi_table_attr_list, node) { 361 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) 362 if (table_attr->instance < attr->instance) 363 table_attr->instance = attr->instance; 364 } 365 table_attr->instance++; 366 367 if (table_attr->instance > 1 || (table_attr->instance == 1 && 368 !acpi_get_table 369 (table_header->signature, 2, &header))) 370 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", 371 table_attr->instance); 372 373 table_attr->attr.size = table_header->length; 374 table_attr->attr.read = acpi_table_show; 375 table_attr->attr.attr.name = table_attr->name; 376 table_attr->attr.attr.mode = 0400; 377 378 return; 379 } 380 381 static acpi_status 382 acpi_sysfs_table_handler(u32 event, void *table, void *context) 383 { 384 struct acpi_table_attr *table_attr; 385 386 switch (event) { 387 case ACPI_TABLE_EVENT_LOAD: 388 table_attr = 389 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); 390 if (!table_attr) 391 return AE_NO_MEMORY; 392 393 acpi_table_attr_init(table_attr, table); 394 if (sysfs_create_bin_file(dynamic_tables_kobj, 395 &table_attr->attr)) { 396 kfree(table_attr); 397 return AE_ERROR; 398 } else 399 list_add_tail(&table_attr->node, &acpi_table_attr_list); 400 break; 401 case ACPI_TABLE_EVENT_UNLOAD: 402 /* 403 * we do not need to do anything right now 404 * because the table is not deleted from the 405 * global table list when unloading it. 406 */ 407 break; 408 default: 409 return AE_BAD_PARAMETER; 410 } 411 return AE_OK; 412 } 413 414 static int acpi_tables_sysfs_init(void) 415 { 416 struct acpi_table_attr *table_attr; 417 struct acpi_table_header *table_header = NULL; 418 int table_index; 419 acpi_status status; 420 int ret; 421 422 tables_kobj = kobject_create_and_add("tables", acpi_kobj); 423 if (!tables_kobj) 424 goto err; 425 426 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); 427 if (!dynamic_tables_kobj) 428 goto err_dynamic_tables; 429 430 for (table_index = 0;; table_index++) { 431 status = acpi_get_table_by_index(table_index, &table_header); 432 433 if (status == AE_BAD_PARAMETER) 434 break; 435 436 if (ACPI_FAILURE(status)) 437 continue; 438 439 table_attr = NULL; 440 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); 441 if (!table_attr) 442 return -ENOMEM; 443 444 acpi_table_attr_init(table_attr, table_header); 445 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr); 446 if (ret) { 447 kfree(table_attr); 448 return ret; 449 } 450 list_add_tail(&table_attr->node, &acpi_table_attr_list); 451 } 452 453 kobject_uevent(tables_kobj, KOBJ_ADD); 454 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); 455 status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); 456 457 return ACPI_FAILURE(status) ? -EINVAL : 0; 458 err_dynamic_tables: 459 kobject_put(tables_kobj); 460 err: 461 return -ENOMEM; 462 } 463 464 /* 465 * Detailed ACPI IRQ counters: 466 * /sys/firmware/acpi/interrupts/ 467 */ 468 469 u32 acpi_irq_handled; 470 u32 acpi_irq_not_handled; 471 472 #define COUNT_GPE 0 473 #define COUNT_SCI 1 /* acpi_irq_handled */ 474 #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ 475 #define COUNT_ERROR 3 /* other */ 476 #define NUM_COUNTERS_EXTRA 4 477 478 struct event_counter { 479 u32 count; 480 u32 flags; 481 }; 482 483 static struct event_counter *all_counters; 484 static u32 num_gpes; 485 static u32 num_counters; 486 static struct attribute **all_attrs; 487 static u32 acpi_gpe_count; 488 489 static struct attribute_group interrupt_stats_attr_group = { 490 .name = "interrupts", 491 }; 492 493 static struct kobj_attribute *counter_attrs; 494 495 static void delete_gpe_attr_array(void) 496 { 497 struct event_counter *tmp = all_counters; 498 499 all_counters = NULL; 500 kfree(tmp); 501 502 if (counter_attrs) { 503 int i; 504 505 for (i = 0; i < num_gpes; i++) 506 kfree(counter_attrs[i].attr.name); 507 508 kfree(counter_attrs); 509 } 510 kfree(all_attrs); 511 512 return; 513 } 514 515 static void gpe_count(u32 gpe_number) 516 { 517 acpi_gpe_count++; 518 519 if (!all_counters) 520 return; 521 522 if (gpe_number < num_gpes) 523 all_counters[gpe_number].count++; 524 else 525 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + 526 COUNT_ERROR].count++; 527 528 return; 529 } 530 531 static void fixed_event_count(u32 event_number) 532 { 533 if (!all_counters) 534 return; 535 536 if (event_number < ACPI_NUM_FIXED_EVENTS) 537 all_counters[num_gpes + event_number].count++; 538 else 539 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + 540 COUNT_ERROR].count++; 541 542 return; 543 } 544 545 static void acpi_global_event_handler(u32 event_type, acpi_handle device, 546 u32 event_number, void *context) 547 { 548 if (event_type == ACPI_EVENT_TYPE_GPE) 549 gpe_count(event_number); 550 551 if (event_type == ACPI_EVENT_TYPE_FIXED) 552 fixed_event_count(event_number); 553 } 554 555 static int get_status(u32 index, acpi_event_status *status, 556 acpi_handle *handle) 557 { 558 int result; 559 560 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) 561 return -EINVAL; 562 563 if (index < num_gpes) { 564 result = acpi_get_gpe_device(index, handle); 565 if (result) { 566 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, 567 "Invalid GPE 0x%x", index)); 568 return result; 569 } 570 result = acpi_get_gpe_status(*handle, index, status); 571 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) 572 result = acpi_get_event_status(index - num_gpes, status); 573 574 return result; 575 } 576 577 static ssize_t counter_show(struct kobject *kobj, 578 struct kobj_attribute *attr, char *buf) 579 { 580 int index = attr - counter_attrs; 581 int size; 582 acpi_handle handle; 583 acpi_event_status status; 584 int result = 0; 585 586 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = 587 acpi_irq_handled; 588 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = 589 acpi_irq_not_handled; 590 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = 591 acpi_gpe_count; 592 size = sprintf(buf, "%8u", all_counters[index].count); 593 594 /* "gpe_all" or "sci" */ 595 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) 596 goto end; 597 598 result = get_status(index, &status, &handle); 599 if (result) 600 goto end; 601 602 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) 603 size += sprintf(buf + size, " invalid"); 604 else if (status & ACPI_EVENT_FLAG_ENABLED) 605 size += sprintf(buf + size, " enabled"); 606 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) 607 size += sprintf(buf + size, " wake_enabled"); 608 else 609 size += sprintf(buf + size, " disabled"); 610 611 end: 612 size += sprintf(buf + size, "\n"); 613 return result ? result : size; 614 } 615 616 /* 617 * counter_set() sets the specified counter. 618 * setting the total "sci" file to any value clears all counters. 619 * enable/disable/clear a gpe/fixed event in user space. 620 */ 621 static ssize_t counter_set(struct kobject *kobj, 622 struct kobj_attribute *attr, const char *buf, 623 size_t size) 624 { 625 int index = attr - counter_attrs; 626 acpi_event_status status; 627 acpi_handle handle; 628 int result = 0; 629 unsigned long tmp; 630 631 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { 632 int i; 633 for (i = 0; i < num_counters; ++i) 634 all_counters[i].count = 0; 635 acpi_gpe_count = 0; 636 acpi_irq_handled = 0; 637 acpi_irq_not_handled = 0; 638 goto end; 639 } 640 641 /* show the event status for both GPEs and Fixed Events */ 642 result = get_status(index, &status, &handle); 643 if (result) 644 goto end; 645 646 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { 647 printk(KERN_WARNING PREFIX 648 "Can not change Invalid GPE/Fixed Event status\n"); 649 return -EINVAL; 650 } 651 652 if (index < num_gpes) { 653 if (!strcmp(buf, "disable\n") && 654 (status & ACPI_EVENT_FLAG_ENABLED)) 655 result = acpi_disable_gpe(handle, index); 656 else if (!strcmp(buf, "enable\n") && 657 !(status & ACPI_EVENT_FLAG_ENABLED)) 658 result = acpi_enable_gpe(handle, index); 659 else if (!strcmp(buf, "clear\n") && 660 (status & ACPI_EVENT_FLAG_SET)) 661 result = acpi_clear_gpe(handle, index); 662 else if (!kstrtoul(buf, 0, &tmp)) 663 all_counters[index].count = tmp; 664 else 665 result = -EINVAL; 666 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { 667 int event = index - num_gpes; 668 if (!strcmp(buf, "disable\n") && 669 (status & ACPI_EVENT_FLAG_ENABLED)) 670 result = acpi_disable_event(event, ACPI_NOT_ISR); 671 else if (!strcmp(buf, "enable\n") && 672 !(status & ACPI_EVENT_FLAG_ENABLED)) 673 result = acpi_enable_event(event, ACPI_NOT_ISR); 674 else if (!strcmp(buf, "clear\n") && 675 (status & ACPI_EVENT_FLAG_SET)) 676 result = acpi_clear_event(event); 677 else if (!kstrtoul(buf, 0, &tmp)) 678 all_counters[index].count = tmp; 679 else 680 result = -EINVAL; 681 } else 682 all_counters[index].count = strtoul(buf, NULL, 0); 683 684 if (ACPI_FAILURE(result)) 685 result = -EINVAL; 686 end: 687 return result ? result : size; 688 } 689 690 void acpi_irq_stats_init(void) 691 { 692 acpi_status status; 693 int i; 694 695 if (all_counters) 696 return; 697 698 num_gpes = acpi_current_gpe_count; 699 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; 700 701 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), 702 GFP_KERNEL); 703 if (all_attrs == NULL) 704 return; 705 706 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), 707 GFP_KERNEL); 708 if (all_counters == NULL) 709 goto fail; 710 711 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); 712 if (ACPI_FAILURE(status)) 713 goto fail; 714 715 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), 716 GFP_KERNEL); 717 if (counter_attrs == NULL) 718 goto fail; 719 720 for (i = 0; i < num_counters; ++i) { 721 char buffer[12]; 722 char *name; 723 724 if (i < num_gpes) 725 sprintf(buffer, "gpe%02X", i); 726 else if (i == num_gpes + ACPI_EVENT_PMTIMER) 727 sprintf(buffer, "ff_pmtimer"); 728 else if (i == num_gpes + ACPI_EVENT_GLOBAL) 729 sprintf(buffer, "ff_gbl_lock"); 730 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) 731 sprintf(buffer, "ff_pwr_btn"); 732 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) 733 sprintf(buffer, "ff_slp_btn"); 734 else if (i == num_gpes + ACPI_EVENT_RTC) 735 sprintf(buffer, "ff_rt_clk"); 736 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) 737 sprintf(buffer, "gpe_all"); 738 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) 739 sprintf(buffer, "sci"); 740 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) 741 sprintf(buffer, "sci_not"); 742 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) 743 sprintf(buffer, "error"); 744 else 745 sprintf(buffer, "bug%02X", i); 746 747 name = kstrdup(buffer, GFP_KERNEL); 748 if (name == NULL) 749 goto fail; 750 751 sysfs_attr_init(&counter_attrs[i].attr); 752 counter_attrs[i].attr.name = name; 753 counter_attrs[i].attr.mode = 0644; 754 counter_attrs[i].show = counter_show; 755 counter_attrs[i].store = counter_set; 756 757 all_attrs[i] = &counter_attrs[i].attr; 758 } 759 760 interrupt_stats_attr_group.attrs = all_attrs; 761 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) 762 return; 763 764 fail: 765 delete_gpe_attr_array(); 766 return; 767 } 768 769 static void __exit interrupt_stats_exit(void) 770 { 771 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); 772 773 delete_gpe_attr_array(); 774 775 return; 776 } 777 778 static ssize_t 779 acpi_show_profile(struct device *dev, struct device_attribute *attr, 780 char *buf) 781 { 782 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); 783 } 784 785 static const struct device_attribute pm_profile_attr = 786 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); 787 788 static ssize_t hotplug_enabled_show(struct kobject *kobj, 789 struct kobj_attribute *attr, char *buf) 790 { 791 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); 792 793 return sprintf(buf, "%d\n", hotplug->enabled); 794 } 795 796 static ssize_t hotplug_enabled_store(struct kobject *kobj, 797 struct kobj_attribute *attr, 798 const char *buf, size_t size) 799 { 800 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); 801 unsigned int val; 802 803 if (kstrtouint(buf, 10, &val) || val > 1) 804 return -EINVAL; 805 806 acpi_scan_hotplug_enabled(hotplug, val); 807 return size; 808 } 809 810 static struct kobj_attribute hotplug_enabled_attr = 811 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, 812 hotplug_enabled_store); 813 814 static struct attribute *hotplug_profile_attrs[] = { 815 &hotplug_enabled_attr.attr, 816 NULL 817 }; 818 819 static struct kobj_type acpi_hotplug_profile_ktype = { 820 .sysfs_ops = &kobj_sysfs_ops, 821 .default_attrs = hotplug_profile_attrs, 822 }; 823 824 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, 825 const char *name) 826 { 827 int error; 828 829 if (!hotplug_kobj) 830 goto err_out; 831 832 error = kobject_init_and_add(&hotplug->kobj, 833 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); 834 if (error) 835 goto err_out; 836 837 kobject_uevent(&hotplug->kobj, KOBJ_ADD); 838 return; 839 840 err_out: 841 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); 842 } 843 844 static ssize_t force_remove_show(struct kobject *kobj, 845 struct kobj_attribute *attr, char *buf) 846 { 847 return sprintf(buf, "%d\n", !!acpi_force_hot_remove); 848 } 849 850 static ssize_t force_remove_store(struct kobject *kobj, 851 struct kobj_attribute *attr, 852 const char *buf, size_t size) 853 { 854 bool val; 855 int ret; 856 857 ret = strtobool(buf, &val); 858 if (ret < 0) 859 return ret; 860 861 lock_device_hotplug(); 862 acpi_force_hot_remove = val; 863 unlock_device_hotplug(); 864 return size; 865 } 866 867 static const struct kobj_attribute force_remove_attr = 868 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, 869 force_remove_store); 870 871 int __init acpi_sysfs_init(void) 872 { 873 int result; 874 875 result = acpi_tables_sysfs_init(); 876 if (result) 877 return result; 878 879 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); 880 if (!hotplug_kobj) 881 return -ENOMEM; 882 883 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); 884 if (result) 885 return result; 886 887 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); 888 return result; 889 } 890