drivers/acpi/sysfs.c

   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 #define PREFIX "ACPI: "
  16
  17 #ifdef CONFIG_ACPI_DEBUG
  18 /*
  19  * ACPI debug sysfs I/F, including:
  20  * /sys/modules/acpi/parameters/debug_layer
  21  * /sys/modules/acpi/parameters/debug_level
  22  * /sys/modules/acpi/parameters/trace_method_name
  23  * /sys/modules/acpi/parameters/trace_state
  24  * /sys/modules/acpi/parameters/trace_debug_layer
  25  * /sys/modules/acpi/parameters/trace_debug_level
  26  */
  27
  28 struct acpi_dlayer {
  29         const char *name;
  30         unsigned long value;
  31 };
  32 struct acpi_dlevel {
  33         const char *name;
  34         unsigned long value;
  35 };
  36 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
  37
  38 static const struct acpi_dlayer acpi_debug_layers[] = {
  39         ACPI_DEBUG_INIT(ACPI_UTILITIES),
  40         ACPI_DEBUG_INIT(ACPI_HARDWARE),
  41         ACPI_DEBUG_INIT(ACPI_EVENTS),
  42         ACPI_DEBUG_INIT(ACPI_TABLES),
  43         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
  44         ACPI_DEBUG_INIT(ACPI_PARSER),
  45         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
  46         ACPI_DEBUG_INIT(ACPI_EXECUTER),
  47         ACPI_DEBUG_INIT(ACPI_RESOURCES),
  48         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
  49         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
  50         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
  51         ACPI_DEBUG_INIT(ACPI_COMPILER),
  52         ACPI_DEBUG_INIT(ACPI_TOOLS),
  53
  54         ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
  55         ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
  56         ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
  57         ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
  58         ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
  59         ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
  60         ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
  61         ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
  62         ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
  63         ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
  64         ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
  65         ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
  66         ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
  67         ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
  68 };
  69
  70 static const struct acpi_dlevel acpi_debug_levels[] = {
  71         ACPI_DEBUG_INIT(ACPI_LV_INIT),
  72         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
  73         ACPI_DEBUG_INIT(ACPI_LV_INFO),
  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, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
 165 module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
 166
 167 static char trace_method_name[6];
 168 module_param_string(trace_method_name, trace_method_name, 6, 0644);
 169 static unsigned int trace_debug_layer;
 170 module_param(trace_debug_layer, uint, 0644);
 171 static unsigned int trace_debug_level;
 172 module_param(trace_debug_level, uint, 0644);
 173
 174 static int param_set_trace_state(const char *val, struct kernel_param *kp)
 175 {
 176         int result = 0;
 177
 178         if (!strncmp(val, "enable", sizeof("enable") - 1)) {
 179                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 180                                           trace_debug_layer, 0);
 181                 if (result)
 182                         result = -EBUSY;
 183                 goto exit;
 184         }
 185
 186         if (!strncmp(val, "disable", sizeof("disable") - 1)) {
 187                 int name = 0;
 188                 result = acpi_debug_trace((char *)&name, trace_debug_level,
 189                                           trace_debug_layer, 0);
 190                 if (result)
 191                         result = -EBUSY;
 192                 goto exit;
 193         }
 194
 195         if (!strncmp(val, "1", 1)) {
 196                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 197                                           trace_debug_layer, 1);
 198                 if (result)
 199                         result = -EBUSY;
 200                 goto exit;
 201         }
 202
 203         result = -EINVAL;
 204 exit:
 205         return result;
 206 }
 207
 208 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 209 {
 210         if (!acpi_gbl_trace_method_name)
 211                 return sprintf(buffer, "disable");
 212         else {
 213                 if (acpi_gbl_trace_flags & 1)
 214                         return sprintf(buffer, "1");
 215                 else
 216                         return sprintf(buffer, "enable");
 217         }
 218         return 0;
 219 }
 220
 221 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 222                   NULL, 0644);
 223 #endif /* CONFIG_ACPI_DEBUG */
 224
 225
 226 /* /sys/modules/acpi/parameters/aml_debug_output */
 227
 228 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
 229                    bool, 0644);
 230 MODULE_PARM_DESC(aml_debug_output,
 231                  "To enable/disable the ACPI Debug Object output.");
 232
 233 /* /sys/module/acpi/parameters/acpica_version */
 234 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 235 {
 236         int result;
 237
 238         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 239
 240         return result;
 241 }
 242
 243 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 244
 245 /*
 246  * ACPI table sysfs I/F:
 247  * /sys/firmware/acpi/tables/
 248  * /sys/firmware/acpi/tables/dynamic/
 249  */
 250
 251 static LIST_HEAD(acpi_table_attr_list);
 252 static struct kobject *tables_kobj;
 253 static struct kobject *dynamic_tables_kobj;
 254 static struct kobject *hotplug_kobj;
 255
 256 struct acpi_table_attr {
 257         struct bin_attribute attr;
 258         char name[8];
 259         int instance;
 260         struct list_head node;
 261 };
 262
 263 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 264                                struct bin_attribute *bin_attr, char *buf,
 265                                loff_t offset, size_t count)
 266 {
 267         struct acpi_table_attr *table_attr =
 268             container_of(bin_attr, struct acpi_table_attr, attr);
 269         struct acpi_table_header *table_header = NULL;
 270         acpi_status status;
 271         char name[ACPI_NAME_SIZE];
 272
 273         if (strncmp(table_attr->name, "NULL", 4))
 274                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 275         else
 276                 memcpy(name, "\0\0\0\0", 4);
 277
 278         status = acpi_get_table(name, table_attr->instance, &table_header);
 279         if (ACPI_FAILURE(status))
 280                 return -ENODEV;
 281
 282         return memory_read_from_buffer(buf, count, &offset,
 283                                        table_header, table_header->length);
 284 }
 285
 286 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 287                                  struct acpi_table_header *table_header)
 288 {
 289         struct acpi_table_header *header = NULL;
 290         struct acpi_table_attr *attr = NULL;
 291
 292         sysfs_attr_init(&table_attr->attr.attr);
 293         if (table_header->signature[0] != '\0')
 294                 memcpy(table_attr->name, table_header->signature,
 295                        ACPI_NAME_SIZE);
 296         else
 297                 memcpy(table_attr->name, "NULL", 4);
 298
 299         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 300                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 301                         if (table_attr->instance < attr->instance)
 302                                 table_attr->instance = attr->instance;
 303         }
 304         table_attr->instance++;
 305
 306         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 307                                          !acpi_get_table
 308                                          (table_header->signature, 2, &header)))
 309                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 310                         table_attr->instance);
 311
 312         table_attr->attr.size = table_header->length;
 313         table_attr->attr.read = acpi_table_show;
 314         table_attr->attr.attr.name = table_attr->name;
 315         table_attr->attr.attr.mode = 0400;
 316
 317         return;
 318 }
 319
 320 static acpi_status
 321 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 322 {
 323         struct acpi_table_attr *table_attr;
 324
 325         switch (event) {
 326         case ACPI_TABLE_EVENT_LOAD:
 327                 table_attr =
 328                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 329                 if (!table_attr)
 330                         return AE_NO_MEMORY;
 331
 332                 acpi_table_attr_init(table_attr, table);
 333                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 334                                           &table_attr->attr)) {
 335                         kfree(table_attr);
 336                         return AE_ERROR;
 337                 } else
 338                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 339                 break;
 340         case ACPI_TABLE_EVENT_UNLOAD:
 341                 /*
 342                  * we do not need to do anything right now
 343                  * because the table is not deleted from the
 344                  * global table list when unloading it.
 345                  */
 346                 break;
 347         default:
 348                 return AE_BAD_PARAMETER;
 349         }
 350         return AE_OK;
 351 }
 352
 353 static int acpi_tables_sysfs_init(void)
 354 {
 355         struct acpi_table_attr *table_attr;
 356         struct acpi_table_header *table_header = NULL;
 357         int table_index;
 358         acpi_status status;
 359         int ret;
 360
 361         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 362         if (!tables_kobj)
 363                 goto err;
 364
 365         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 366         if (!dynamic_tables_kobj)
 367                 goto err_dynamic_tables;
 368
 369         for (table_index = 0;; table_index++) {
 370                 status = acpi_get_table_by_index(table_index, &table_header);
 371
 372                 if (status == AE_BAD_PARAMETER)
 373                         break;
 374
 375                 if (ACPI_FAILURE(status))
 376                         continue;
 377
 378                 table_attr = NULL;
 379                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
 380                 if (!table_attr)
 381                         return -ENOMEM;
 382
 383                 acpi_table_attr_init(table_attr, table_header);
 384                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
 385                 if (ret) {
 386                         kfree(table_attr);
 387                         return ret;
 388                 }
 389                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
 390         }
 391
 392         kobject_uevent(tables_kobj, KOBJ_ADD);
 393         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 394         status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 395
 396         return ACPI_FAILURE(status) ? -EINVAL : 0;
 397 err_dynamic_tables:
 398         kobject_put(tables_kobj);
 399 err:
 400         return -ENOMEM;
 401 }
 402
 403 /*
 404  * Detailed ACPI IRQ counters:
 405  * /sys/firmware/acpi/interrupts/
 406  */
 407
 408 u32 acpi_irq_handled;
 409 u32 acpi_irq_not_handled;
 410
 411 #define COUNT_GPE 0
 412 #define COUNT_SCI 1             /* acpi_irq_handled */
 413 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 414 #define COUNT_ERROR 3           /* other */
 415 #define NUM_COUNTERS_EXTRA 4
 416
 417 struct event_counter {
 418         u32 count;
 419         u32 flags;
 420 };
 421
 422 static struct event_counter *all_counters;
 423 static u32 num_gpes;
 424 static u32 num_counters;
 425 static struct attribute **all_attrs;
 426 static u32 acpi_gpe_count;
 427
 428 static struct attribute_group interrupt_stats_attr_group = {
 429         .name = "interrupts",
 430 };
 431
 432 static struct kobj_attribute *counter_attrs;
 433
 434 static void delete_gpe_attr_array(void)
 435 {
 436         struct event_counter *tmp = all_counters;
 437
 438         all_counters = NULL;
 439         kfree(tmp);
 440
 441         if (counter_attrs) {
 442                 int i;
 443
 444                 for (i = 0; i < num_gpes; i++)
 445                         kfree(counter_attrs[i].attr.name);
 446
 447                 kfree(counter_attrs);
 448         }
 449         kfree(all_attrs);
 450
 451         return;
 452 }
 453
 454 static void gpe_count(u32 gpe_number)
 455 {
 456         acpi_gpe_count++;
 457
 458         if (!all_counters)
 459                 return;
 460
 461         if (gpe_number < num_gpes)
 462                 all_counters[gpe_number].count++;
 463         else
 464                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 465                              COUNT_ERROR].count++;
 466
 467         return;
 468 }
 469
 470 static void fixed_event_count(u32 event_number)
 471 {
 472         if (!all_counters)
 473                 return;
 474
 475         if (event_number < ACPI_NUM_FIXED_EVENTS)
 476                 all_counters[num_gpes + event_number].count++;
 477         else
 478                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 479                              COUNT_ERROR].count++;
 480
 481         return;
 482 }
 483
 484 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 485         u32 event_number, void *context)
 486 {
 487         if (event_type == ACPI_EVENT_TYPE_GPE)
 488                 gpe_count(event_number);
 489
 490         if (event_type == ACPI_EVENT_TYPE_FIXED)
 491                 fixed_event_count(event_number);
 492 }
 493
 494 static int get_status(u32 index, acpi_event_status *status,
 495                       acpi_handle *handle)
 496 {
 497         int result = 0;
 498
 499         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 500                 goto end;
 501
 502         if (index < num_gpes) {
 503                 result = acpi_get_gpe_device(index, handle);
 504                 if (result) {
 505                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 506                                         "Invalid GPE 0x%x", index));
 507                         goto end;
 508                 }
 509                 result = acpi_get_gpe_status(*handle, index, status);
 510         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 511                 result = acpi_get_event_status(index - num_gpes, status);
 512
 513 end:
 514         return result;
 515 }
 516
 517 static ssize_t counter_show(struct kobject *kobj,
 518                             struct kobj_attribute *attr, char *buf)
 519 {
 520         int index = attr - counter_attrs;
 521         int size;
 522         acpi_handle handle;
 523         acpi_event_status status;
 524         int result = 0;
 525
 526         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 527             acpi_irq_handled;
 528         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 529             acpi_irq_not_handled;
 530         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 531             acpi_gpe_count;
 532         size = sprintf(buf, "%8d", all_counters[index].count);
 533
 534         /* "gpe_all" or "sci" */
 535         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 536                 goto end;
 537
 538         result = get_status(index, &status, &handle);
 539         if (result)
 540                 goto end;
 541
 542         if (!(status & ACPI_EVENT_FLAG_HANDLE))
 543                 size += sprintf(buf + size, "   invalid");
 544         else if (status & ACPI_EVENT_FLAG_ENABLED)
 545                 size += sprintf(buf + size, "   enabled");
 546         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 547                 size += sprintf(buf + size, "   wake_enabled");
 548         else
 549                 size += sprintf(buf + size, "   disabled");
 550
 551 end:
 552         size += sprintf(buf + size, "\n");
 553         return result ? result : size;
 554 }
 555
 556 /*
 557  * counter_set() sets the specified counter.
 558  * setting the total "sci" file to any value clears all counters.
 559  * enable/disable/clear a gpe/fixed event in user space.
 560  */
 561 static ssize_t counter_set(struct kobject *kobj,
 562                            struct kobj_attribute *attr, const char *buf,
 563                            size_t size)
 564 {
 565         int index = attr - counter_attrs;
 566         acpi_event_status status;
 567         acpi_handle handle;
 568         int result = 0;
 569         unsigned long tmp;
 570
 571         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 572                 int i;
 573                 for (i = 0; i < num_counters; ++i)
 574                         all_counters[i].count = 0;
 575                 acpi_gpe_count = 0;
 576                 acpi_irq_handled = 0;
 577                 acpi_irq_not_handled = 0;
 578                 goto end;
 579         }
 580
 581         /* show the event status for both GPEs and Fixed Events */
 582         result = get_status(index, &status, &handle);
 583         if (result)
 584                 goto end;
 585
 586         if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
 587                 printk(KERN_WARNING PREFIX
 588                        "Can not change Invalid GPE/Fixed Event status\n");
 589                 return -EINVAL;
 590         }
 591
 592         if (index < num_gpes) {
 593                 if (!strcmp(buf, "disable\n") &&
 594                     (status & ACPI_EVENT_FLAG_ENABLED))
 595                         result = acpi_disable_gpe(handle, index);
 596                 else if (!strcmp(buf, "enable\n") &&
 597                          !(status & ACPI_EVENT_FLAG_ENABLED))
 598                         result = acpi_enable_gpe(handle, index);
 599                 else if (!strcmp(buf, "clear\n") &&
 600                          (status & ACPI_EVENT_FLAG_SET))
 601                         result = acpi_clear_gpe(handle, index);
 602                 else if (!kstrtoul(buf, 0, &tmp))
 603                         all_counters[index].count = tmp;
 604                 else
 605                         result = -EINVAL;
 606         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 607                 int event = index - num_gpes;
 608                 if (!strcmp(buf, "disable\n") &&
 609                     (status & ACPI_EVENT_FLAG_ENABLED))
 610                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 611                 else if (!strcmp(buf, "enable\n") &&
 612                          !(status & ACPI_EVENT_FLAG_ENABLED))
 613                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 614                 else if (!strcmp(buf, "clear\n") &&
 615                          (status & ACPI_EVENT_FLAG_SET))
 616                         result = acpi_clear_event(event);
 617                 else if (!kstrtoul(buf, 0, &tmp))
 618                         all_counters[index].count = tmp;
 619                 else
 620                         result = -EINVAL;
 621         } else
 622                 all_counters[index].count = strtoul(buf, NULL, 0);
 623
 624         if (ACPI_FAILURE(result))
 625                 result = -EINVAL;
 626 end:
 627         return result ? result : size;
 628 }
 629
 630 void acpi_irq_stats_init(void)
 631 {
 632         acpi_status status;
 633         int i;
 634
 635         if (all_counters)
 636                 return;
 637
 638         num_gpes = acpi_current_gpe_count;
 639         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 640
 641         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 642                             GFP_KERNEL);
 643         if (all_attrs == NULL)
 644                 return;
 645
 646         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 647                                GFP_KERNEL);
 648         if (all_counters == NULL)
 649                 goto fail;
 650
 651         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 652         if (ACPI_FAILURE(status))
 653                 goto fail;
 654
 655         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 656                                 GFP_KERNEL);
 657         if (counter_attrs == NULL)
 658                 goto fail;
 659
 660         for (i = 0; i < num_counters; ++i) {
 661                 char buffer[12];
 662                 char *name;
 663
 664                 if (i < num_gpes)
 665                         sprintf(buffer, "gpe%02X", i);
 666                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 667                         sprintf(buffer, "ff_pmtimer");
 668                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 669                         sprintf(buffer, "ff_gbl_lock");
 670                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 671                         sprintf(buffer, "ff_pwr_btn");
 672                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 673                         sprintf(buffer, "ff_slp_btn");
 674                 else if (i == num_gpes + ACPI_EVENT_RTC)
 675                         sprintf(buffer, "ff_rt_clk");
 676                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 677                         sprintf(buffer, "gpe_all");
 678                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 679                         sprintf(buffer, "sci");
 680                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 681                         sprintf(buffer, "sci_not");
 682                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 683                         sprintf(buffer, "error");
 684                 else
 685                         sprintf(buffer, "bug%02X", i);
 686
 687                 name = kstrdup(buffer, GFP_KERNEL);
 688                 if (name == NULL)
 689                         goto fail;
 690
 691                 sysfs_attr_init(&counter_attrs[i].attr);
 692                 counter_attrs[i].attr.name = name;
 693                 counter_attrs[i].attr.mode = 0644;
 694                 counter_attrs[i].show = counter_show;
 695                 counter_attrs[i].store = counter_set;
 696
 697                 all_attrs[i] = &counter_attrs[i].attr;
 698         }
 699
 700         interrupt_stats_attr_group.attrs = all_attrs;
 701         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 702                 return;
 703
 704 fail:
 705         delete_gpe_attr_array();
 706         return;
 707 }
 708
 709 static void __exit interrupt_stats_exit(void)
 710 {
 711         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 712
 713         delete_gpe_attr_array();
 714
 715         return;
 716 }
 717
 718 static ssize_t
 719 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 720                   char *buf)
 721 {
 722         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 723 }
 724
 725 static const struct device_attribute pm_profile_attr =
 726         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 727
 728 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 729                                     struct kobj_attribute *attr, char *buf)
 730 {
 731         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 732
 733         return sprintf(buf, "%d\n", hotplug->enabled);
 734 }
 735
 736 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 737                                      struct kobj_attribute *attr,
 738                                      const char *buf, size_t size)
 739 {
 740         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 741         unsigned int val;
 742
 743         if (kstrtouint(buf, 10, &val) || val > 1)
 744                 return -EINVAL;
 745
 746         acpi_scan_hotplug_enabled(hotplug, val);
 747         return size;
 748 }
 749
 750 static struct kobj_attribute hotplug_enabled_attr =
 751         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 752                 hotplug_enabled_store);
 753
 754 static struct attribute *hotplug_profile_attrs[] = {
 755         &hotplug_enabled_attr.attr,
 756         NULL
 757 };
 758
 759 static struct kobj_type acpi_hotplug_profile_ktype = {
 760         .sysfs_ops = &kobj_sysfs_ops,
 761         .default_attrs = hotplug_profile_attrs,
 762 };
 763
 764 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 765                                     const char *name)
 766 {
 767         int error;
 768
 769         if (!hotplug_kobj)
 770                 goto err_out;
 771
 772         error = kobject_init_and_add(&hotplug->kobj,
 773                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
 774         if (error)
 775                 goto err_out;
 776
 777         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
 778         return;
 779
 780  err_out:
 781         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
 782 }
 783
 784 static ssize_t force_remove_show(struct kobject *kobj,
 785                                  struct kobj_attribute *attr, char *buf)
 786 {
 787         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
 788 }
 789
 790 static ssize_t force_remove_store(struct kobject *kobj,
 791                                   struct kobj_attribute *attr,
 792                                   const char *buf, size_t size)
 793 {
 794         bool val;
 795         int ret;
 796
 797         ret = strtobool(buf, &val);
 798         if (ret < 0)
 799                 return ret;
 800
 801         lock_device_hotplug();
 802         acpi_force_hot_remove = val;
 803         unlock_device_hotplug();
 804         return size;
 805 }
 806
 807 static const struct kobj_attribute force_remove_attr =
 808         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
 809                force_remove_store);
 810
 811 int __init acpi_sysfs_init(void)
 812 {
 813         int result;
 814
 815         result = acpi_tables_sysfs_init();
 816         if (result)
 817                 return result;
 818
 819         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 820         result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
 821         if (result)
 822                 return result;
 823
 824         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 825         return result;
 826 }