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