linux/drivers/acpi/sysfs.c
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   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
  11ACPI_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
  26struct acpi_dlayer {
  27        const char *name;
  28        unsigned long value;
  29};
  30struct acpi_dlevel {
  31        const char *name;
  32        unsigned long value;
  33};
  34#define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
  35
  36static 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
  68static 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
 103static 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
 131static 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
 152static const struct kernel_param_ops param_ops_debug_layer = {
 153        .set = param_set_uint,
 154        .get = param_get_debug_layer,
 155};
 156
 157static const struct kernel_param_ops param_ops_debug_level = {
 158        .set = param_set_uint,
 159        .get = param_get_debug_level,
 160};
 161
 162module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
 163module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
 164
 165static char trace_method_name[6];
 166module_param_string(trace_method_name, trace_method_name, 6, 0644);
 167static unsigned int trace_debug_layer;
 168module_param(trace_debug_layer, uint, 0644);
 169static unsigned int trace_debug_level;
 170module_param(trace_debug_level, uint, 0644);
 171
 172static 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;
 202exit:
 203        return result;
 204}
 205
 206static 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
 219module_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
 226module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
 227                   bool, 0644);
 228MODULE_PARM_DESC(aml_debug_output,
 229                 "To enable/disable the ACPI Debug Object output.");
 230
 231/* /sys/module/acpi/parameters/acpica_version */
 232static 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
 241module_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
 249static LIST_HEAD(acpi_table_attr_list);
 250static struct kobject *tables_kobj;
 251static struct kobject *dynamic_tables_kobj;
 252
 253struct acpi_table_attr {
 254        struct bin_attribute attr;
 255        char name[8];
 256        int instance;
 257        struct list_head node;
 258};
 259
 260static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 261                               struct bin_attribute *bin_attr, char *buf,
 262                               loff_t offset, size_t count)
 263{
 264        struct acpi_table_attr *table_attr =
 265            container_of(bin_attr, struct acpi_table_attr, attr);
 266        struct acpi_table_header *table_header = NULL;
 267        acpi_status status;
 268        char name[ACPI_NAME_SIZE];
 269
 270        if (strncmp(table_attr->name, "NULL", 4))
 271                memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 272        else
 273                memcpy(name, "\0\0\0\0", 4);
 274
 275        status = acpi_get_table(name, table_attr->instance, &table_header);
 276        if (ACPI_FAILURE(status))
 277                return -ENODEV;
 278
 279        return memory_read_from_buffer(buf, count, &offset,
 280                                       table_header, table_header->length);
 281}
 282
 283static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 284                                 struct acpi_table_header *table_header)
 285{
 286        struct acpi_table_header *header = NULL;
 287        struct acpi_table_attr *attr = NULL;
 288
 289        sysfs_attr_init(&table_attr->attr.attr);
 290        if (table_header->signature[0] != '\0')
 291                memcpy(table_attr->name, table_header->signature,
 292                       ACPI_NAME_SIZE);
 293        else
 294                memcpy(table_attr->name, "NULL", 4);
 295
 296        list_for_each_entry(attr, &acpi_table_attr_list, node) {
 297                if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 298                        if (table_attr->instance < attr->instance)
 299                                table_attr->instance = attr->instance;
 300        }
 301        table_attr->instance++;
 302
 303        if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 304                                         !acpi_get_table
 305                                         (table_header->signature, 2, &header)))
 306                sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 307                        table_attr->instance);
 308
 309        table_attr->attr.size = 0;
 310        table_attr->attr.read = acpi_table_show;
 311        table_attr->attr.attr.name = table_attr->name;
 312        table_attr->attr.attr.mode = 0400;
 313
 314        return;
 315}
 316
 317static acpi_status
 318acpi_sysfs_table_handler(u32 event, void *table, void *context)
 319{
 320        struct acpi_table_attr *table_attr;
 321
 322        switch (event) {
 323        case ACPI_TABLE_EVENT_LOAD:
 324                table_attr =
 325                    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 326                if (!table_attr)
 327                        return AE_NO_MEMORY;
 328
 329                acpi_table_attr_init(table_attr, table);
 330                if (sysfs_create_bin_file(dynamic_tables_kobj,
 331                                          &table_attr->attr)) {
 332                        kfree(table_attr);
 333                        return AE_ERROR;
 334                } else
 335                        list_add_tail(&table_attr->node, &acpi_table_attr_list);
 336                break;
 337        case ACPI_TABLE_EVENT_UNLOAD:
 338                /*
 339                 * we do not need to do anything right now
 340                 * because the table is not deleted from the
 341                 * global table list when unloading it.
 342                 */
 343                break;
 344        default:
 345                return AE_BAD_PARAMETER;
 346        }
 347        return AE_OK;
 348}
 349
 350static int acpi_tables_sysfs_init(void)
 351{
 352        struct acpi_table_attr *table_attr;
 353        struct acpi_table_header *table_header = NULL;
 354        int table_index = 0;
 355        int result;
 356
 357        tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 358        if (!tables_kobj)
 359                goto err;
 360
 361        dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 362        if (!dynamic_tables_kobj)
 363                goto err_dynamic_tables;
 364
 365        do {
 366                result = acpi_get_table_by_index(table_index, &table_header);
 367                if (!result) {
 368                        table_index++;
 369                        table_attr = NULL;
 370                        table_attr =
 371                            kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 372                        if (!table_attr)
 373                                return -ENOMEM;
 374
 375                        acpi_table_attr_init(table_attr, table_header);
 376                        result =
 377                            sysfs_create_bin_file(tables_kobj,
 378                                                  &table_attr->attr);
 379                        if (result) {
 380                                kfree(table_attr);
 381                                return result;
 382                        } else
 383                                list_add_tail(&table_attr->node,
 384                                              &acpi_table_attr_list);
 385                }
 386        } while (!result);
 387        kobject_uevent(tables_kobj, KOBJ_ADD);
 388        kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 389        result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 390
 391        return result == AE_OK ? 0 : -EINVAL;
 392err_dynamic_tables:
 393        kobject_put(tables_kobj);
 394err:
 395        return -ENOMEM;
 396}
 397
 398/*
 399 * Detailed ACPI IRQ counters:
 400 * /sys/firmware/acpi/interrupts/
 401 */
 402
 403u32 acpi_irq_handled;
 404u32 acpi_irq_not_handled;
 405
 406#define COUNT_GPE 0
 407#define COUNT_SCI 1             /* acpi_irq_handled */
 408#define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 409#define COUNT_ERROR 3           /* other */
 410#define NUM_COUNTERS_EXTRA 4
 411
 412struct event_counter {
 413        u32 count;
 414        u32 flags;
 415};
 416
 417static struct event_counter *all_counters;
 418static u32 num_gpes;
 419static u32 num_counters;
 420static struct attribute **all_attrs;
 421static u32 acpi_gpe_count;
 422
 423static struct attribute_group interrupt_stats_attr_group = {
 424        .name = "interrupts",
 425};
 426
 427static struct kobj_attribute *counter_attrs;
 428
 429static void delete_gpe_attr_array(void)
 430{
 431        struct event_counter *tmp = all_counters;
 432
 433        all_counters = NULL;
 434        kfree(tmp);
 435
 436        if (counter_attrs) {
 437                int i;
 438
 439                for (i = 0; i < num_gpes; i++)
 440                        kfree(counter_attrs[i].attr.name);
 441
 442                kfree(counter_attrs);
 443        }
 444        kfree(all_attrs);
 445
 446        return;
 447}
 448
 449static void gpe_count(u32 gpe_number)
 450{
 451        acpi_gpe_count++;
 452
 453        if (!all_counters)
 454                return;
 455
 456        if (gpe_number < num_gpes)
 457                all_counters[gpe_number].count++;
 458        else
 459                all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 460                             COUNT_ERROR].count++;
 461
 462        return;
 463}
 464
 465static void fixed_event_count(u32 event_number)
 466{
 467        if (!all_counters)
 468                return;
 469
 470        if (event_number < ACPI_NUM_FIXED_EVENTS)
 471                all_counters[num_gpes + event_number].count++;
 472        else
 473                all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 474                             COUNT_ERROR].count++;
 475
 476        return;
 477}
 478
 479static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
 480        u32 event_number, void *context)
 481{
 482        if (event_type == ACPI_EVENT_TYPE_GPE)
 483                gpe_count(event_number);
 484
 485        if (event_type == ACPI_EVENT_TYPE_FIXED)
 486                fixed_event_count(event_number);
 487}
 488
 489static int get_status(u32 index, acpi_event_status *status,
 490                      acpi_handle *handle)
 491{
 492        int result = 0;
 493
 494        if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 495                goto end;
 496
 497        if (index < num_gpes) {
 498                result = acpi_get_gpe_device(index, handle);
 499                if (result) {
 500                        ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 501                                        "Invalid GPE 0x%x\n", index));
 502                        goto end;
 503                }
 504                result = acpi_get_gpe_status(*handle, index, status);
 505        } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 506                result = acpi_get_event_status(index - num_gpes, status);
 507
 508end:
 509        return result;
 510}
 511
 512static ssize_t counter_show(struct kobject *kobj,
 513                            struct kobj_attribute *attr, char *buf)
 514{
 515        int index = attr - counter_attrs;
 516        int size;
 517        acpi_handle handle;
 518        acpi_event_status status;
 519        int result = 0;
 520
 521        all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 522            acpi_irq_handled;
 523        all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 524            acpi_irq_not_handled;
 525        all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 526            acpi_gpe_count;
 527        size = sprintf(buf, "%8d", all_counters[index].count);
 528
 529        /* "gpe_all" or "sci" */
 530        if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 531                goto end;
 532
 533        result = get_status(index, &status, &handle);
 534        if (result)
 535                goto end;
 536
 537        if (!(status & ACPI_EVENT_FLAG_HANDLE))
 538                size += sprintf(buf + size, "   invalid");
 539        else if (status & ACPI_EVENT_FLAG_ENABLED)
 540                size += sprintf(buf + size, "   enabled");
 541        else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 542                size += sprintf(buf + size, "   wake_enabled");
 543        else
 544                size += sprintf(buf + size, "   disabled");
 545
 546end:
 547        size += sprintf(buf + size, "\n");
 548        return result ? result : size;
 549}
 550
 551/*
 552 * counter_set() sets the specified counter.
 553 * setting the total "sci" file to any value clears all counters.
 554 * enable/disable/clear a gpe/fixed event in user space.
 555 */
 556static ssize_t counter_set(struct kobject *kobj,
 557                           struct kobj_attribute *attr, const char *buf,
 558                           size_t size)
 559{
 560        int index = attr - counter_attrs;
 561        acpi_event_status status;
 562        acpi_handle handle;
 563        int result = 0;
 564
 565        if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 566                int i;
 567                for (i = 0; i < num_counters; ++i)
 568                        all_counters[i].count = 0;
 569                acpi_gpe_count = 0;
 570                acpi_irq_handled = 0;
 571                acpi_irq_not_handled = 0;
 572                goto end;
 573        }
 574
 575        /* show the event status for both GPEs and Fixed Events */
 576        result = get_status(index, &status, &handle);
 577        if (result)
 578                goto end;
 579
 580        if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
 581                printk(KERN_WARNING PREFIX
 582                       "Can not change Invalid GPE/Fixed Event status\n");
 583                return -EINVAL;
 584        }
 585
 586        if (index < num_gpes) {
 587                if (!strcmp(buf, "disable\n") &&
 588                    (status & ACPI_EVENT_FLAG_ENABLED))
 589                        result = acpi_disable_gpe(handle, index);
 590                else if (!strcmp(buf, "enable\n") &&
 591                         !(status & ACPI_EVENT_FLAG_ENABLED))
 592                        result = acpi_enable_gpe(handle, index);
 593                else if (!strcmp(buf, "clear\n") &&
 594                         (status & ACPI_EVENT_FLAG_SET))
 595                        result = acpi_clear_gpe(handle, index);
 596                else
 597                        all_counters[index].count = strtoul(buf, NULL, 0);
 598        } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 599                int event = index - num_gpes;
 600                if (!strcmp(buf, "disable\n") &&
 601                    (status & ACPI_EVENT_FLAG_ENABLED))
 602                        result = acpi_disable_event(event, ACPI_NOT_ISR);
 603                else if (!strcmp(buf, "enable\n") &&
 604                         !(status & ACPI_EVENT_FLAG_ENABLED))
 605                        result = acpi_enable_event(event, ACPI_NOT_ISR);
 606                else if (!strcmp(buf, "clear\n") &&
 607                         (status & ACPI_EVENT_FLAG_SET))
 608                        result = acpi_clear_event(event);
 609                else
 610                        all_counters[index].count = strtoul(buf, NULL, 0);
 611        } else
 612                all_counters[index].count = strtoul(buf, NULL, 0);
 613
 614        if (ACPI_FAILURE(result))
 615                result = -EINVAL;
 616end:
 617        return result ? result : size;
 618}
 619
 620void acpi_irq_stats_init(void)
 621{
 622        acpi_status status;
 623        int i;
 624
 625        if (all_counters)
 626                return;
 627
 628        num_gpes = acpi_current_gpe_count;
 629        num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 630
 631        all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 632                            GFP_KERNEL);
 633        if (all_attrs == NULL)
 634                return;
 635
 636        all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 637                               GFP_KERNEL);
 638        if (all_counters == NULL)
 639                goto fail;
 640
 641        status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
 642        if (ACPI_FAILURE(status))
 643                goto fail;
 644
 645        counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 646                                GFP_KERNEL);
 647        if (counter_attrs == NULL)
 648                goto fail;
 649
 650        for (i = 0; i < num_counters; ++i) {
 651                char buffer[12];
 652                char *name;
 653
 654                if (i < num_gpes)
 655                        sprintf(buffer, "gpe%02X", i);
 656                else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 657                        sprintf(buffer, "ff_pmtimer");
 658                else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 659                        sprintf(buffer, "ff_gbl_lock");
 660                else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 661                        sprintf(buffer, "ff_pwr_btn");
 662                else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 663                        sprintf(buffer, "ff_slp_btn");
 664                else if (i == num_gpes + ACPI_EVENT_RTC)
 665                        sprintf(buffer, "ff_rt_clk");
 666                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 667                        sprintf(buffer, "gpe_all");
 668                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 669                        sprintf(buffer, "sci");
 670                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 671                        sprintf(buffer, "sci_not");
 672                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 673                        sprintf(buffer, "error");
 674                else
 675                        sprintf(buffer, "bug%02X", i);
 676
 677                name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
 678                if (name == NULL)
 679                        goto fail;
 680                strncpy(name, buffer, strlen(buffer) + 1);
 681
 682                sysfs_attr_init(&counter_attrs[i].attr);
 683                counter_attrs[i].attr.name = name;
 684                counter_attrs[i].attr.mode = 0644;
 685                counter_attrs[i].show = counter_show;
 686                counter_attrs[i].store = counter_set;
 687
 688                all_attrs[i] = &counter_attrs[i].attr;
 689        }
 690
 691        interrupt_stats_attr_group.attrs = all_attrs;
 692        if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 693                return;
 694
 695fail:
 696        delete_gpe_attr_array();
 697        return;
 698}
 699
 700static void __exit interrupt_stats_exit(void)
 701{
 702        sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 703
 704        delete_gpe_attr_array();
 705
 706        return;
 707}
 708
 709static ssize_t
 710acpi_show_profile(struct device *dev, struct device_attribute *attr,
 711                  char *buf)
 712{
 713        return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 714}
 715
 716static const struct device_attribute pm_profile_attr =
 717        __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 718
 719int __init acpi_sysfs_init(void)
 720{
 721        int result;
 722
 723        result = acpi_tables_sysfs_init();
 724        if (result)
 725                return result;
 726        result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 727        return result;
 728}
 729
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