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, 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 struct kernel_param_ops param_ops_debug_layer = {
 153         .set = param_set_uint,
 154         .get = param_get_debug_layer,
 155 };
 156
 157 static 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", strlen("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", strlen("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 /* /sys/module/acpi/parameters/acpica_version */
 224 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 225 {
 226         int result;
 227
 228         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 229
 230         return result;
 231 }
 232
 233 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 234
 235 /*
 236  * ACPI table sysfs I/F:
 237  * /sys/firmware/acpi/tables/
 238  * /sys/firmware/acpi/tables/dynamic/
 239  */
 240
 241 static LIST_HEAD(acpi_table_attr_list);
 242 static struct kobject *tables_kobj;
 243 static struct kobject *dynamic_tables_kobj;
 244
 245 struct acpi_table_attr {
 246         struct bin_attribute attr;
 247         char name[8];
 248         int instance;
 249         struct list_head node;
 250 };
 251
 252 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 253                                struct bin_attribute *bin_attr, char *buf,
 254                                loff_t offset, size_t count)
 255 {
 256         struct acpi_table_attr *table_attr =
 257             container_of(bin_attr, struct acpi_table_attr, attr);
 258         struct acpi_table_header *table_header = NULL;
 259         acpi_status status;
 260         char name[ACPI_NAME_SIZE];
 261
 262         if (strncmp(table_attr->name, "NULL", 4))
 263                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 264         else
 265                 memcpy(name, "\0\0\0\0", 4);
 266
 267         status = acpi_get_table(name, table_attr->instance, &table_header);
 268         if (ACPI_FAILURE(status))
 269                 return -ENODEV;
 270
 271         return memory_read_from_buffer(buf, count, &offset,
 272                                        table_header, table_header->length);
 273 }
 274
 275 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 276                                  struct acpi_table_header *table_header)
 277 {
 278         struct acpi_table_header *header = NULL;
 279         struct acpi_table_attr *attr = NULL;
 280
 281         sysfs_attr_init(&table_attr->attr.attr);
 282         if (table_header->signature[0] != '\0')
 283                 memcpy(table_attr->name, table_header->signature,
 284                        ACPI_NAME_SIZE);
 285         else
 286                 memcpy(table_attr->name, "NULL", 4);
 287
 288         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 289                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 290                         if (table_attr->instance < attr->instance)
 291                                 table_attr->instance = attr->instance;
 292         }
 293         table_attr->instance++;
 294
 295         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 296                                          !acpi_get_table
 297                                          (table_header->signature, 2, &header)))
 298                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 299                         table_attr->instance);
 300
 301         table_attr->attr.size = 0;
 302         table_attr->attr.read = acpi_table_show;
 303         table_attr->attr.attr.name = table_attr->name;
 304         table_attr->attr.attr.mode = 0400;
 305
 306         return;
 307 }
 308
 309 static acpi_status
 310 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 311 {
 312         struct acpi_table_attr *table_attr;
 313
 314         switch (event) {
 315         case ACPI_TABLE_EVENT_LOAD:
 316                 table_attr =
 317                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 318                 if (!table_attr)
 319                         return AE_NO_MEMORY;
 320
 321                 acpi_table_attr_init(table_attr, table);
 322                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 323                                           &table_attr->attr)) {
 324                         kfree(table_attr);
 325                         return AE_ERROR;
 326                 } else
 327                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 328                 break;
 329         case ACPI_TABLE_EVENT_UNLOAD:
 330                 /*
 331                  * we do not need to do anything right now
 332                  * because the table is not deleted from the
 333                  * global table list when unloading it.
 334                  */
 335                 break;
 336         default:
 337                 return AE_BAD_PARAMETER;
 338         }
 339         return AE_OK;
 340 }
 341
 342 static int acpi_tables_sysfs_init(void)
 343 {
 344         struct acpi_table_attr *table_attr;
 345         struct acpi_table_header *table_header = NULL;
 346         int table_index = 0;
 347         int result;
 348
 349         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 350         if (!tables_kobj)
 351                 goto err;
 352
 353         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 354         if (!dynamic_tables_kobj)
 355                 goto err_dynamic_tables;
 356
 357         do {
 358                 result = acpi_get_table_by_index(table_index, &table_header);
 359                 if (!result) {
 360                         table_index++;
 361                         table_attr = NULL;
 362                         table_attr =
 363                             kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 364                         if (!table_attr)
 365                                 return -ENOMEM;
 366
 367                         acpi_table_attr_init(table_attr, table_header);
 368                         result =
 369                             sysfs_create_bin_file(tables_kobj,
 370                                                   &table_attr->attr);
 371                         if (result) {
 372                                 kfree(table_attr);
 373                                 return result;
 374                         } else
 375                                 list_add_tail(&table_attr->node,
 376                                               &acpi_table_attr_list);
 377                 }
 378         } while (!result);
 379         kobject_uevent(tables_kobj, KOBJ_ADD);
 380         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 381         result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 382
 383         return result == AE_OK ? 0 : -EINVAL;
 384 err_dynamic_tables:
 385         kobject_put(tables_kobj);
 386 err:
 387         return -ENOMEM;
 388 }
 389
 390 /*
 391  * Detailed ACPI IRQ counters:
 392  * /sys/firmware/acpi/interrupts/
 393  */
 394
 395 u32 acpi_irq_handled;
 396 u32 acpi_irq_not_handled;
 397
 398 #define COUNT_GPE 0
 399 #define COUNT_SCI 1             /* acpi_irq_handled */
 400 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 401 #define COUNT_ERROR 3           /* other */
 402 #define NUM_COUNTERS_EXTRA 4
 403
 404 struct event_counter {
 405         u32 count;
 406         u32 flags;
 407 };
 408
 409 static struct event_counter *all_counters;
 410 static u32 num_gpes;
 411 static u32 num_counters;
 412 static struct attribute **all_attrs;
 413 static u32 acpi_gpe_count;
 414
 415 static struct attribute_group interrupt_stats_attr_group = {
 416         .name = "interrupts",
 417 };
 418
 419 static struct kobj_attribute *counter_attrs;
 420
 421 static void delete_gpe_attr_array(void)
 422 {
 423         struct event_counter *tmp = all_counters;
 424
 425         all_counters = NULL;
 426         kfree(tmp);
 427
 428         if (counter_attrs) {
 429                 int i;
 430
 431                 for (i = 0; i < num_gpes; i++)
 432                         kfree(counter_attrs[i].attr.name);
 433
 434                 kfree(counter_attrs);
 435         }
 436         kfree(all_attrs);
 437
 438         return;
 439 }
 440
 441 static void gpe_count(u32 gpe_number)
 442 {
 443         acpi_gpe_count++;
 444
 445         if (!all_counters)
 446                 return;
 447
 448         if (gpe_number < num_gpes)
 449                 all_counters[gpe_number].count++;
 450         else
 451                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 452                              COUNT_ERROR].count++;
 453
 454         return;
 455 }
 456
 457 static void fixed_event_count(u32 event_number)
 458 {
 459         if (!all_counters)
 460                 return;
 461
 462         if (event_number < ACPI_NUM_FIXED_EVENTS)
 463                 all_counters[num_gpes + event_number].count++;
 464         else
 465                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 466                              COUNT_ERROR].count++;
 467
 468         return;
 469 }
 470
 471 static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
 472         u32 event_number, void *context)
 473 {
 474         if (event_type == ACPI_EVENT_TYPE_GPE)
 475                 gpe_count(event_number);
 476
 477         if (event_type == ACPI_EVENT_TYPE_FIXED)
 478                 fixed_event_count(event_number);
 479 }
 480
 481 static int get_status(u32 index, acpi_event_status *status,
 482                       acpi_handle *handle)
 483 {
 484         int result = 0;
 485
 486         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 487                 goto end;
 488
 489         if (index < num_gpes) {
 490                 result = acpi_get_gpe_device(index, handle);
 491                 if (result) {
 492                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 493                                         "Invalid GPE 0x%x\n", index));
 494                         goto end;
 495                 }
 496                 result = acpi_get_gpe_status(*handle, index, status);
 497         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 498                 result = acpi_get_event_status(index - num_gpes, status);
 499
 500 end:
 501         return result;
 502 }
 503
 504 static ssize_t counter_show(struct kobject *kobj,
 505                             struct kobj_attribute *attr, char *buf)
 506 {
 507         int index = attr - counter_attrs;
 508         int size;
 509         acpi_handle handle;
 510         acpi_event_status status;
 511         int result = 0;
 512
 513         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 514             acpi_irq_handled;
 515         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 516             acpi_irq_not_handled;
 517         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 518             acpi_gpe_count;
 519         size = sprintf(buf, "%8d", all_counters[index].count);
 520
 521         /* "gpe_all" or "sci" */
 522         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 523                 goto end;
 524
 525         result = get_status(index, &status, &handle);
 526         if (result)
 527                 goto end;
 528
 529         if (!(status & ACPI_EVENT_FLAG_HANDLE))
 530                 size += sprintf(buf + size, "   invalid");
 531         else if (status & ACPI_EVENT_FLAG_ENABLED)
 532                 size += sprintf(buf + size, "   enabled");
 533         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 534                 size += sprintf(buf + size, "   wake_enabled");
 535         else
 536                 size += sprintf(buf + size, "   disabled");
 537
 538 end:
 539         size += sprintf(buf + size, "\n");
 540         return result ? result : size;
 541 }
 542
 543 /*
 544  * counter_set() sets the specified counter.
 545  * setting the total "sci" file to any value clears all counters.
 546  * enable/disable/clear a gpe/fixed event in user space.
 547  */
 548 static ssize_t counter_set(struct kobject *kobj,
 549                            struct kobj_attribute *attr, const char *buf,
 550                            size_t size)
 551 {
 552         int index = attr - counter_attrs;
 553         acpi_event_status status;
 554         acpi_handle handle;
 555         int result = 0;
 556
 557         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 558                 int i;
 559                 for (i = 0; i < num_counters; ++i)
 560                         all_counters[i].count = 0;
 561                 acpi_gpe_count = 0;
 562                 acpi_irq_handled = 0;
 563                 acpi_irq_not_handled = 0;
 564                 goto end;
 565         }
 566
 567         /* show the event status for both GPEs and Fixed Events */
 568         result = get_status(index, &status, &handle);
 569         if (result)
 570                 goto end;
 571
 572         if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
 573                 printk(KERN_WARNING PREFIX
 574                        "Can not change Invalid GPE/Fixed Event status\n");
 575                 return -EINVAL;
 576         }
 577
 578         if (index < num_gpes) {
 579                 if (!strcmp(buf, "disable\n") &&
 580                     (status & ACPI_EVENT_FLAG_ENABLED))
 581                         result = acpi_disable_gpe(handle, index);
 582                 else if (!strcmp(buf, "enable\n") &&
 583                          !(status & ACPI_EVENT_FLAG_ENABLED))
 584                         result = acpi_enable_gpe(handle, index);
 585                 else if (!strcmp(buf, "clear\n") &&
 586                          (status & ACPI_EVENT_FLAG_SET))
 587                         result = acpi_clear_gpe(handle, index);
 588                 else
 589                         all_counters[index].count = strtoul(buf, NULL, 0);
 590         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 591                 int event = index - num_gpes;
 592                 if (!strcmp(buf, "disable\n") &&
 593                     (status & ACPI_EVENT_FLAG_ENABLED))
 594                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 595                 else if (!strcmp(buf, "enable\n") &&
 596                          !(status & ACPI_EVENT_FLAG_ENABLED))
 597                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 598                 else if (!strcmp(buf, "clear\n") &&
 599                          (status & ACPI_EVENT_FLAG_SET))
 600                         result = acpi_clear_event(event);
 601                 else
 602                         all_counters[index].count = strtoul(buf, NULL, 0);
 603         } else
 604                 all_counters[index].count = strtoul(buf, NULL, 0);
 605
 606         if (ACPI_FAILURE(result))
 607                 result = -EINVAL;
 608 end:
 609         return result ? result : size;
 610 }
 611
 612 void acpi_irq_stats_init(void)
 613 {
 614         acpi_status status;
 615         int i;
 616
 617         if (all_counters)
 618                 return;
 619
 620         num_gpes = acpi_current_gpe_count;
 621         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 622
 623         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 624                             GFP_KERNEL);
 625         if (all_attrs == NULL)
 626                 return;
 627
 628         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 629                                GFP_KERNEL);
 630         if (all_counters == NULL)
 631                 goto fail;
 632
 633         status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
 634         if (ACPI_FAILURE(status))
 635                 goto fail;
 636
 637         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 638                                 GFP_KERNEL);
 639         if (counter_attrs == NULL)
 640                 goto fail;
 641
 642         for (i = 0; i < num_counters; ++i) {
 643                 char buffer[12];
 644                 char *name;
 645
 646                 if (i < num_gpes)
 647                         sprintf(buffer, "gpe%02X", i);
 648                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 649                         sprintf(buffer, "ff_pmtimer");
 650                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 651                         sprintf(buffer, "ff_gbl_lock");
 652                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 653                         sprintf(buffer, "ff_pwr_btn");
 654                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 655                         sprintf(buffer, "ff_slp_btn");
 656                 else if (i == num_gpes + ACPI_EVENT_RTC)
 657                         sprintf(buffer, "ff_rt_clk");
 658                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 659                         sprintf(buffer, "gpe_all");
 660                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 661                         sprintf(buffer, "sci");
 662                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 663                         sprintf(buffer, "sci_not");
 664                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 665                         sprintf(buffer, "error");
 666                 else
 667                         sprintf(buffer, "bug%02X", i);
 668
 669                 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
 670                 if (name == NULL)
 671                         goto fail;
 672                 strncpy(name, buffer, strlen(buffer) + 1);
 673
 674                 sysfs_attr_init(&counter_attrs[i].attr);
 675                 counter_attrs[i].attr.name = name;
 676                 counter_attrs[i].attr.mode = 0644;
 677                 counter_attrs[i].show = counter_show;
 678                 counter_attrs[i].store = counter_set;
 679
 680                 all_attrs[i] = &counter_attrs[i].attr;
 681         }
 682
 683         interrupt_stats_attr_group.attrs = all_attrs;
 684         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 685                 return;
 686
 687 fail:
 688         delete_gpe_attr_array();
 689         return;
 690 }
 691
 692 static void __exit interrupt_stats_exit(void)
 693 {
 694         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 695
 696         delete_gpe_attr_array();
 697
 698         return;
 699 }
 700
 701 int __init acpi_sysfs_init(void)
 702 {
 703         int result;
 704
 705         result = acpi_tables_sysfs_init();
 706
 707         return result;
 708 }