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 #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 = 0;
 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 = 0;
 358         int result;
 359
 360         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 361         if (!tables_kobj)
 362                 goto err;
 363
 364         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 365         if (!dynamic_tables_kobj)
 366                 goto err_dynamic_tables;
 367
 368         do {
 369                 result = acpi_get_table_by_index(table_index, &table_header);
 370                 if (!result) {
 371                         table_index++;
 372                         table_attr = NULL;
 373                         table_attr =
 374                             kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 375                         if (!table_attr)
 376                                 return -ENOMEM;
 377
 378                         acpi_table_attr_init(table_attr, table_header);
 379                         result =
 380                             sysfs_create_bin_file(tables_kobj,
 381                                                   &table_attr->attr);
 382                         if (result) {
 383                                 kfree(table_attr);
 384                                 return result;
 385                         } else
 386                                 list_add_tail(&table_attr->node,
 387                                               &acpi_table_attr_list);
 388                 }
 389         } while (!result);
 390         kobject_uevent(tables_kobj, KOBJ_ADD);
 391         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 392         result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 393
 394         return result == AE_OK ? 0 : -EINVAL;
 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, "%8d", 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_HANDLE))
 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
 568         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 569                 int i;
 570                 for (i = 0; i < num_counters; ++i)
 571                         all_counters[i].count = 0;
 572                 acpi_gpe_count = 0;
 573                 acpi_irq_handled = 0;
 574                 acpi_irq_not_handled = 0;
 575                 goto end;
 576         }
 577
 578         /* show the event status for both GPEs and Fixed Events */
 579         result = get_status(index, &status, &handle);
 580         if (result)
 581                 goto end;
 582
 583         if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
 584                 printk(KERN_WARNING PREFIX
 585                        "Can not change Invalid GPE/Fixed Event status\n");
 586                 return -EINVAL;
 587         }
 588
 589         if (index < num_gpes) {
 590                 if (!strcmp(buf, "disable\n") &&
 591                     (status & ACPI_EVENT_FLAG_ENABLED))
 592                         result = acpi_disable_gpe(handle, index);
 593                 else if (!strcmp(buf, "enable\n") &&
 594                          !(status & ACPI_EVENT_FLAG_ENABLED))
 595                         result = acpi_enable_gpe(handle, index);
 596                 else if (!strcmp(buf, "clear\n") &&
 597                          (status & ACPI_EVENT_FLAG_SET))
 598                         result = acpi_clear_gpe(handle, index);
 599                 else
 600                         all_counters[index].count = strtoul(buf, NULL, 0);
 601         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 602                 int event = index - num_gpes;
 603                 if (!strcmp(buf, "disable\n") &&
 604                     (status & ACPI_EVENT_FLAG_ENABLED))
 605                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 606                 else if (!strcmp(buf, "enable\n") &&
 607                          !(status & ACPI_EVENT_FLAG_ENABLED))
 608                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 609                 else if (!strcmp(buf, "clear\n") &&
 610                          (status & ACPI_EVENT_FLAG_SET))
 611                         result = acpi_clear_event(event);
 612                 else
 613                         all_counters[index].count = strtoul(buf, NULL, 0);
 614         } else
 615                 all_counters[index].count = strtoul(buf, NULL, 0);
 616
 617         if (ACPI_FAILURE(result))
 618                 result = -EINVAL;
 619 end:
 620         return result ? result : size;
 621 }
 622
 623 void acpi_irq_stats_init(void)
 624 {
 625         acpi_status status;
 626         int i;
 627
 628         if (all_counters)
 629                 return;
 630
 631         num_gpes = acpi_current_gpe_count;
 632         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 633
 634         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 635                             GFP_KERNEL);
 636         if (all_attrs == NULL)
 637                 return;
 638
 639         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 640                                GFP_KERNEL);
 641         if (all_counters == NULL)
 642                 goto fail;
 643
 644         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 645         if (ACPI_FAILURE(status))
 646                 goto fail;
 647
 648         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 649                                 GFP_KERNEL);
 650         if (counter_attrs == NULL)
 651                 goto fail;
 652
 653         for (i = 0; i < num_counters; ++i) {
 654                 char buffer[12];
 655                 char *name;
 656
 657                 if (i < num_gpes)
 658                         sprintf(buffer, "gpe%02X", i);
 659                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 660                         sprintf(buffer, "ff_pmtimer");
 661                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 662                         sprintf(buffer, "ff_gbl_lock");
 663                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 664                         sprintf(buffer, "ff_pwr_btn");
 665                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 666                         sprintf(buffer, "ff_slp_btn");
 667                 else if (i == num_gpes + ACPI_EVENT_RTC)
 668                         sprintf(buffer, "ff_rt_clk");
 669                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 670                         sprintf(buffer, "gpe_all");
 671                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 672                         sprintf(buffer, "sci");
 673                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 674                         sprintf(buffer, "sci_not");
 675                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 676                         sprintf(buffer, "error");
 677                 else
 678                         sprintf(buffer, "bug%02X", i);
 679
 680                 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
 681                 if (name == NULL)
 682                         goto fail;
 683                 strncpy(name, buffer, strlen(buffer) + 1);
 684
 685                 sysfs_attr_init(&counter_attrs[i].attr);
 686                 counter_attrs[i].attr.name = name;
 687                 counter_attrs[i].attr.mode = 0644;
 688                 counter_attrs[i].show = counter_show;
 689                 counter_attrs[i].store = counter_set;
 690
 691                 all_attrs[i] = &counter_attrs[i].attr;
 692         }
 693
 694         interrupt_stats_attr_group.attrs = all_attrs;
 695         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 696                 return;
 697
 698 fail:
 699         delete_gpe_attr_array();
 700         return;
 701 }
 702
 703 static void __exit interrupt_stats_exit(void)
 704 {
 705         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 706
 707         delete_gpe_attr_array();
 708
 709         return;
 710 }
 711
 712 static ssize_t
 713 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 714                   char *buf)
 715 {
 716         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 717 }
 718
 719 static const struct device_attribute pm_profile_attr =
 720         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 721
 722 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 723                                     struct kobj_attribute *attr, char *buf)
 724 {
 725         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 726
 727         return sprintf(buf, "%d\n", hotplug->enabled);
 728 }
 729
 730 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 731                                      struct kobj_attribute *attr,
 732                                      const char *buf, size_t size)
 733 {
 734         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 735         unsigned int val;
 736
 737         if (kstrtouint(buf, 10, &val) || val > 1)
 738                 return -EINVAL;
 739
 740         acpi_scan_hotplug_enabled(hotplug, val);
 741         return size;
 742 }
 743
 744 static struct kobj_attribute hotplug_enabled_attr =
 745         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 746                 hotplug_enabled_store);
 747
 748 static struct attribute *hotplug_profile_attrs[] = {
 749         &hotplug_enabled_attr.attr,
 750         NULL
 751 };
 752
 753 static struct kobj_type acpi_hotplug_profile_ktype = {
 754         .sysfs_ops = &kobj_sysfs_ops,
 755         .default_attrs = hotplug_profile_attrs,
 756 };
 757
 758 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 759                                     const char *name)
 760 {
 761         int error;
 762
 763         if (!hotplug_kobj)
 764                 goto err_out;
 765
 766         kobject_init(&hotplug->kobj, &acpi_hotplug_profile_ktype);
 767         error = kobject_set_name(&hotplug->kobj, "%s", name);
 768         if (error)
 769                 goto err_out;
 770
 771         hotplug->kobj.parent = hotplug_kobj;
 772         error = kobject_add(&hotplug->kobj, hotplug_kobj, NULL);
 773         if (error)
 774                 goto err_out;
 775
 776         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
 777         return;
 778
 779  err_out:
 780         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
 781 }
 782
 783 int __init acpi_sysfs_init(void)
 784 {
 785         int result;
 786
 787         result = acpi_tables_sysfs_init();
 788         if (result)
 789                 return result;
 790
 791         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 792         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 793         return result;
 794 }