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 <acpi/acpi_drivers.h>
   9
  10 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
  11 ACPI_MODULE_NAME("sysfs");
  12
  13 #define PREFIX "ACPI: "
  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, 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, 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 module_param_call(debug_layer, param_set_uint, param_get_debug_layer,
 153                   &acpi_dbg_layer, 0644);
 154 module_param_call(debug_level, param_set_uint, param_get_debug_level,
 155                   &acpi_dbg_level, 0644);
 156
 157 static char trace_method_name[6];
 158 module_param_string(trace_method_name, trace_method_name, 6, 0644);
 159 static unsigned int trace_debug_layer;
 160 module_param(trace_debug_layer, uint, 0644);
 161 static unsigned int trace_debug_level;
 162 module_param(trace_debug_level, uint, 0644);
 163
 164 static int param_set_trace_state(const char *val, struct kernel_param *kp)
 165 {
 166         int result = 0;
 167
 168         if (!strncmp(val, "enable", strlen("enable") - 1)) {
 169                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 170                                           trace_debug_layer, 0);
 171                 if (result)
 172                         result = -EBUSY;
 173                 goto exit;
 174         }
 175
 176         if (!strncmp(val, "disable", strlen("disable") - 1)) {
 177                 int name = 0;
 178                 result = acpi_debug_trace((char *)&name, trace_debug_level,
 179                                           trace_debug_layer, 0);
 180                 if (result)
 181                         result = -EBUSY;
 182                 goto exit;
 183         }
 184
 185         if (!strncmp(val, "1", 1)) {
 186                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 187                                           trace_debug_layer, 1);
 188                 if (result)
 189                         result = -EBUSY;
 190                 goto exit;
 191         }
 192
 193         result = -EINVAL;
 194 exit:
 195         return result;
 196 }
 197
 198 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 199 {
 200         if (!acpi_gbl_trace_method_name)
 201                 return sprintf(buffer, "disable");
 202         else {
 203                 if (acpi_gbl_trace_flags & 1)
 204                         return sprintf(buffer, "1");
 205                 else
 206                         return sprintf(buffer, "enable");
 207         }
 208         return 0;
 209 }
 210
 211 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 212                   NULL, 0644);
 213 #endif /* CONFIG_ACPI_DEBUG */
 214
 215 /* /sys/module/acpi/parameters/acpica_version */
 216 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 217 {
 218         int result;
 219
 220         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 221
 222         return result;
 223 }
 224
 225 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 226
 227 /*
 228  * ACPI table sysfs I/F:
 229  * /sys/firmware/acpi/tables/
 230  * /sys/firmware/acpi/tables/dynamic/
 231  */
 232
 233 static LIST_HEAD(acpi_table_attr_list);
 234 static struct kobject *tables_kobj;
 235 static struct kobject *dynamic_tables_kobj;
 236
 237 struct acpi_table_attr {
 238         struct bin_attribute attr;
 239         char name[8];
 240         int instance;
 241         struct list_head node;
 242 };
 243
 244 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 245                                struct bin_attribute *bin_attr, char *buf,
 246                                loff_t offset, size_t count)
 247 {
 248         struct acpi_table_attr *table_attr =
 249             container_of(bin_attr, struct acpi_table_attr, attr);
 250         struct acpi_table_header *table_header = NULL;
 251         acpi_status status;
 252         char name[ACPI_NAME_SIZE];
 253
 254         if (strncmp(table_attr->name, "NULL", 4))
 255                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 256         else
 257                 memcpy(name, "\0\0\0\0", 4);
 258
 259         status = acpi_get_table(name, table_attr->instance, &table_header);
 260         if (ACPI_FAILURE(status))
 261                 return -ENODEV;
 262
 263         return memory_read_from_buffer(buf, count, &offset,
 264                                        table_header, table_header->length);
 265 }
 266
 267 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 268                                  struct acpi_table_header *table_header)
 269 {
 270         struct acpi_table_header *header = NULL;
 271         struct acpi_table_attr *attr = NULL;
 272
 273         sysfs_attr_init(&table_attr->attr.attr);
 274         if (table_header->signature[0] != '\0')
 275                 memcpy(table_attr->name, table_header->signature,
 276                        ACPI_NAME_SIZE);
 277         else
 278                 memcpy(table_attr->name, "NULL", 4);
 279
 280         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 281                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 282                         if (table_attr->instance < attr->instance)
 283                                 table_attr->instance = attr->instance;
 284         }
 285         table_attr->instance++;
 286
 287         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 288                                          !acpi_get_table
 289                                          (table_header->signature, 2, &header)))
 290                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 291                         table_attr->instance);
 292
 293         table_attr->attr.size = 0;
 294         table_attr->attr.read = acpi_table_show;
 295         table_attr->attr.attr.name = table_attr->name;
 296         table_attr->attr.attr.mode = 0400;
 297
 298         return;
 299 }
 300
 301 static acpi_status
 302 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 303 {
 304         struct acpi_table_attr *table_attr;
 305
 306         switch (event) {
 307         case ACPI_TABLE_EVENT_LOAD:
 308                 table_attr =
 309                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 310                 if (!table_attr)
 311                         return AE_NO_MEMORY;
 312
 313                 acpi_table_attr_init(table_attr, table);
 314                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 315                                           &table_attr->attr)) {
 316                         kfree(table_attr);
 317                         return AE_ERROR;
 318                 } else
 319                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 320                 break;
 321         case ACPI_TABLE_EVENT_UNLOAD:
 322                 /*
 323                  * we do not need to do anything right now
 324                  * because the table is not deleted from the
 325                  * global table list when unloading it.
 326                  */
 327                 break;
 328         default:
 329                 return AE_BAD_PARAMETER;
 330         }
 331         return AE_OK;
 332 }
 333
 334 static int acpi_tables_sysfs_init(void)
 335 {
 336         struct acpi_table_attr *table_attr;
 337         struct acpi_table_header *table_header = NULL;
 338         int table_index = 0;
 339         int result;
 340
 341         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 342         if (!tables_kobj)
 343                 goto err;
 344
 345         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 346         if (!dynamic_tables_kobj)
 347                 goto err_dynamic_tables;
 348
 349         do {
 350                 result = acpi_get_table_by_index(table_index, &table_header);
 351                 if (!result) {
 352                         table_index++;
 353                         table_attr = NULL;
 354                         table_attr =
 355                             kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 356                         if (!table_attr)
 357                                 return -ENOMEM;
 358
 359                         acpi_table_attr_init(table_attr, table_header);
 360                         result =
 361                             sysfs_create_bin_file(tables_kobj,
 362                                                   &table_attr->attr);
 363                         if (result) {
 364                                 kfree(table_attr);
 365                                 return result;
 366                         } else
 367                                 list_add_tail(&table_attr->node,
 368                                               &acpi_table_attr_list);
 369                 }
 370         } while (!result);
 371         kobject_uevent(tables_kobj, KOBJ_ADD);
 372         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 373         result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 374
 375         return result == AE_OK ? 0 : -EINVAL;
 376 err_dynamic_tables:
 377         kobject_put(tables_kobj);
 378 err:
 379         return -ENOMEM;
 380 }
 381
 382 /*
 383  * Detailed ACPI IRQ counters:
 384  * /sys/firmware/acpi/interrupts/
 385  */
 386
 387 u32 acpi_irq_handled;
 388 u32 acpi_irq_not_handled;
 389
 390 #define COUNT_GPE 0
 391 #define COUNT_SCI 1             /* acpi_irq_handled */
 392 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 393 #define COUNT_ERROR 3           /* other */
 394 #define NUM_COUNTERS_EXTRA 4
 395
 396 struct event_counter {
 397         u32 count;
 398         u32 flags;
 399 };
 400
 401 static struct event_counter *all_counters;
 402 static u32 num_gpes;
 403 static u32 num_counters;
 404 static struct attribute **all_attrs;
 405 static u32 acpi_gpe_count;
 406
 407 static struct attribute_group interrupt_stats_attr_group = {
 408         .name = "interrupts",
 409 };
 410
 411 static struct kobj_attribute *counter_attrs;
 412
 413 static void delete_gpe_attr_array(void)
 414 {
 415         struct event_counter *tmp = all_counters;
 416
 417         all_counters = NULL;
 418         kfree(tmp);
 419
 420         if (counter_attrs) {
 421                 int i;
 422
 423                 for (i = 0; i < num_gpes; i++)
 424                         kfree(counter_attrs[i].attr.name);
 425
 426                 kfree(counter_attrs);
 427         }
 428         kfree(all_attrs);
 429
 430         return;
 431 }
 432
 433 void acpi_os_gpe_count(u32 gpe_number)
 434 {
 435         acpi_gpe_count++;
 436
 437         if (!all_counters)
 438                 return;
 439
 440         if (gpe_number < num_gpes)
 441                 all_counters[gpe_number].count++;
 442         else
 443                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 444                              COUNT_ERROR].count++;
 445
 446         return;
 447 }
 448
 449 void acpi_os_fixed_event_count(u32 event_number)
 450 {
 451         if (!all_counters)
 452                 return;
 453
 454         if (event_number < ACPI_NUM_FIXED_EVENTS)
 455                 all_counters[num_gpes + event_number].count++;
 456         else
 457                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 458                              COUNT_ERROR].count++;
 459
 460         return;
 461 }
 462
 463 static int get_status(u32 index, acpi_event_status *status,
 464                       acpi_handle *handle)
 465 {
 466         int result = 0;
 467
 468         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 469                 goto end;
 470
 471         if (index < num_gpes) {
 472                 result = acpi_get_gpe_device(index, handle);
 473                 if (result) {
 474                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 475                                         "Invalid GPE 0x%x\n", index));
 476                         goto end;
 477                 }
 478                 result = acpi_get_gpe_status(*handle, index, status);
 479         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 480                 result = acpi_get_event_status(index - num_gpes, status);
 481
 482 end:
 483         return result;
 484 }
 485
 486 static ssize_t counter_show(struct kobject *kobj,
 487                             struct kobj_attribute *attr, char *buf)
 488 {
 489         int index = attr - counter_attrs;
 490         int size;
 491         acpi_handle handle;
 492         acpi_event_status status;
 493         int result = 0;
 494
 495         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 496             acpi_irq_handled;
 497         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 498             acpi_irq_not_handled;
 499         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 500             acpi_gpe_count;
 501         size = sprintf(buf, "%8d", all_counters[index].count);
 502
 503         /* "gpe_all" or "sci" */
 504         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 505                 goto end;
 506
 507         result = get_status(index, &status, &handle);
 508         if (result)
 509                 goto end;
 510
 511         if (!(status & ACPI_EVENT_FLAG_HANDLE))
 512                 size += sprintf(buf + size, "   invalid");
 513         else if (status & ACPI_EVENT_FLAG_ENABLED)
 514                 size += sprintf(buf + size, "   enabled");
 515         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 516                 size += sprintf(buf + size, "   wake_enabled");
 517         else
 518                 size += sprintf(buf + size, "   disabled");
 519
 520 end:
 521         size += sprintf(buf + size, "\n");
 522         return result ? result : size;
 523 }
 524
 525 /*
 526  * counter_set() sets the specified counter.
 527  * setting the total "sci" file to any value clears all counters.
 528  * enable/disable/clear a gpe/fixed event in user space.
 529  */
 530 static ssize_t counter_set(struct kobject *kobj,
 531                            struct kobj_attribute *attr, const char *buf,
 532                            size_t size)
 533 {
 534         int index = attr - counter_attrs;
 535         acpi_event_status status;
 536         acpi_handle handle;
 537         int result = 0;
 538
 539         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 540                 int i;
 541                 for (i = 0; i < num_counters; ++i)
 542                         all_counters[i].count = 0;
 543                 acpi_gpe_count = 0;
 544                 acpi_irq_handled = 0;
 545                 acpi_irq_not_handled = 0;
 546                 goto end;
 547         }
 548
 549         /* show the event status for both GPEs and Fixed Events */
 550         result = get_status(index, &status, &handle);
 551         if (result)
 552                 goto end;
 553
 554         if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
 555                 printk(KERN_WARNING PREFIX
 556                        "Can not change Invalid GPE/Fixed Event status\n");
 557                 return -EINVAL;
 558         }
 559
 560         if (index < num_gpes) {
 561                 if (!strcmp(buf, "disable\n") &&
 562                     (status & ACPI_EVENT_FLAG_ENABLED))
 563                         result = acpi_disable_gpe(handle, index);
 564                 else if (!strcmp(buf, "enable\n") &&
 565                          !(status & ACPI_EVENT_FLAG_ENABLED))
 566                         result = acpi_enable_gpe(handle, index);
 567                 else if (!strcmp(buf, "clear\n") &&
 568                          (status & ACPI_EVENT_FLAG_SET))
 569                         result = acpi_clear_gpe(handle, index);
 570                 else
 571                         all_counters[index].count = strtoul(buf, NULL, 0);
 572         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 573                 int event = index - num_gpes;
 574                 if (!strcmp(buf, "disable\n") &&
 575                     (status & ACPI_EVENT_FLAG_ENABLED))
 576                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 577                 else if (!strcmp(buf, "enable\n") &&
 578                          !(status & ACPI_EVENT_FLAG_ENABLED))
 579                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 580                 else if (!strcmp(buf, "clear\n") &&
 581                          (status & ACPI_EVENT_FLAG_SET))
 582                         result = acpi_clear_event(event);
 583                 else
 584                         all_counters[index].count = strtoul(buf, NULL, 0);
 585         } else
 586                 all_counters[index].count = strtoul(buf, NULL, 0);
 587
 588         if (ACPI_FAILURE(result))
 589                 result = -EINVAL;
 590 end:
 591         return result ? result : size;
 592 }
 593
 594 void acpi_irq_stats_init(void)
 595 {
 596         int i;
 597
 598         if (all_counters)
 599                 return;
 600
 601         num_gpes = acpi_current_gpe_count;
 602         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 603
 604         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 605                             GFP_KERNEL);
 606         if (all_attrs == NULL)
 607                 return;
 608
 609         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 610                                GFP_KERNEL);
 611         if (all_counters == NULL)
 612                 goto fail;
 613
 614         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 615                                 GFP_KERNEL);
 616         if (counter_attrs == NULL)
 617                 goto fail;
 618
 619         for (i = 0; i < num_counters; ++i) {
 620                 char buffer[12];
 621                 char *name;
 622
 623                 if (i < num_gpes)
 624                         sprintf(buffer, "gpe%02X", i);
 625                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 626                         sprintf(buffer, "ff_pmtimer");
 627                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 628                         sprintf(buffer, "ff_gbl_lock");
 629                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 630                         sprintf(buffer, "ff_pwr_btn");
 631                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 632                         sprintf(buffer, "ff_slp_btn");
 633                 else if (i == num_gpes + ACPI_EVENT_RTC)
 634                         sprintf(buffer, "ff_rt_clk");
 635                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 636                         sprintf(buffer, "gpe_all");
 637                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 638                         sprintf(buffer, "sci");
 639                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 640                         sprintf(buffer, "sci_not");
 641                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 642                         sprintf(buffer, "error");
 643                 else
 644                         sprintf(buffer, "bug%02X", i);
 645
 646                 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
 647                 if (name == NULL)
 648                         goto fail;
 649                 strncpy(name, buffer, strlen(buffer) + 1);
 650
 651                 sysfs_attr_init(&counter_attrs[i].attr);
 652                 counter_attrs[i].attr.name = name;
 653                 counter_attrs[i].attr.mode = 0644;
 654                 counter_attrs[i].show = counter_show;
 655                 counter_attrs[i].store = counter_set;
 656
 657                 all_attrs[i] = &counter_attrs[i].attr;
 658         }
 659
 660         interrupt_stats_attr_group.attrs = all_attrs;
 661         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 662                 return;
 663
 664 fail:
 665         delete_gpe_attr_array();
 666         return;
 667 }
 668
 669 static void __exit interrupt_stats_exit(void)
 670 {
 671         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 672
 673         delete_gpe_attr_array();
 674
 675         return;
 676 }
 677
 678 int __init acpi_sysfs_init(void)
 679 {
 680         int result;
 681
 682         result = acpi_tables_sysfs_init();
 683
 684         return result;
 685 }