drivers/acpi/sysfs.c

   1 /*
   2  * sysfs.c - ACPI sysfs interface to userspace.
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/kernel.h>
   7 #include <linux/moduleparam.h>
   8 #include <linux/acpi.h>
   9
  10 #include "internal.h"
  11
  12 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
  13 ACPI_MODULE_NAME("sysfs");
  14
  15 #ifdef CONFIG_ACPI_DEBUG
  16 /*
  17  * ACPI debug sysfs I/F, including:
  18  * /sys/modules/acpi/parameters/debug_layer
  19  * /sys/modules/acpi/parameters/debug_level
  20  * /sys/modules/acpi/parameters/trace_method_name
  21  * /sys/modules/acpi/parameters/trace_state
  22  * /sys/modules/acpi/parameters/trace_debug_layer
  23  * /sys/modules/acpi/parameters/trace_debug_level
  24  */
  25
  26 struct acpi_dlayer {
  27         const char *name;
  28         unsigned long value;
  29 };
  30 struct acpi_dlevel {
  31         const char *name;
  32         unsigned long value;
  33 };
  34 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
  35
  36 static const struct acpi_dlayer acpi_debug_layers[] = {
  37         ACPI_DEBUG_INIT(ACPI_UTILITIES),
  38         ACPI_DEBUG_INIT(ACPI_HARDWARE),
  39         ACPI_DEBUG_INIT(ACPI_EVENTS),
  40         ACPI_DEBUG_INIT(ACPI_TABLES),
  41         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
  42         ACPI_DEBUG_INIT(ACPI_PARSER),
  43         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
  44         ACPI_DEBUG_INIT(ACPI_EXECUTER),
  45         ACPI_DEBUG_INIT(ACPI_RESOURCES),
  46         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
  47         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
  48         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
  49         ACPI_DEBUG_INIT(ACPI_COMPILER),
  50         ACPI_DEBUG_INIT(ACPI_TOOLS),
  51
  52         ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
  53         ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
  54         ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
  55         ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
  56         ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
  57         ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
  58         ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
  59         ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
  60         ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
  61         ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
  62         ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
  63         ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
  64         ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
  65         ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
  66 };
  67
  68 static const struct acpi_dlevel acpi_debug_levels[] = {
  69         ACPI_DEBUG_INIT(ACPI_LV_INIT),
  70         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
  71         ACPI_DEBUG_INIT(ACPI_LV_INFO),
  72         ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
  73
  74         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
  75         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
  76         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
  77         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
  78         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
  79         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
  80         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
  81         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
  82         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
  83         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
  84         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
  85         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
  86         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
  87         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
  88
  89         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
  90         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
  91         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
  92
  93         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
  94         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
  95         ACPI_DEBUG_INIT(ACPI_LV_IO),
  96         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
  97
  98         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
  99         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
 100         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
 101         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
 102 };
 103
 104 static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
 105 {
 106         int result = 0;
 107         int i;
 108
 109         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
 110
 111         for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
 112                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
 113                                   acpi_debug_layers[i].name,
 114                                   acpi_debug_layers[i].value,
 115                                   (acpi_dbg_layer & acpi_debug_layers[i].value)
 116                                   ? '*' : ' ');
 117         }
 118         result +=
 119             sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
 120                     ACPI_ALL_DRIVERS,
 121                     (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
 122                     ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
 123                     == 0 ? ' ' : '-');
 124         result +=
 125             sprintf(buffer + result,
 126                     "--\ndebug_layer = 0x%08X ( * = enabled)\n",
 127                     acpi_dbg_layer);
 128
 129         return result;
 130 }
 131
 132 static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
 133 {
 134         int result = 0;
 135         int i;
 136
 137         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
 138
 139         for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
 140                 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
 141                                   acpi_debug_levels[i].name,
 142                                   acpi_debug_levels[i].value,
 143                                   (acpi_dbg_level & acpi_debug_levels[i].value)
 144                                   ? '*' : ' ');
 145         }
 146         result +=
 147             sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
 148                     acpi_dbg_level);
 149
 150         return result;
 151 }
 152
 153 static const struct kernel_param_ops param_ops_debug_layer = {
 154         .set = param_set_uint,
 155         .get = param_get_debug_layer,
 156 };
 157
 158 static const struct kernel_param_ops param_ops_debug_level = {
 159         .set = param_set_uint,
 160         .get = param_get_debug_level,
 161 };
 162
 163 module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
 164 module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
 165
 166 static char trace_method_name[6];
 167 module_param_string(trace_method_name, trace_method_name, 6, 0644);
 168 static unsigned int trace_debug_layer;
 169 module_param(trace_debug_layer, uint, 0644);
 170 static unsigned int trace_debug_level;
 171 module_param(trace_debug_level, uint, 0644);
 172
 173 static int param_set_trace_state(const char *val, struct kernel_param *kp)
 174 {
 175         int result = 0;
 176
 177         if (!strncmp(val, "enable", sizeof("enable") - 1)) {
 178                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 179                                           trace_debug_layer, 0);
 180                 if (result)
 181                         result = -EBUSY;
 182                 goto exit;
 183         }
 184
 185         if (!strncmp(val, "disable", sizeof("disable") - 1)) {
 186                 int name = 0;
 187                 result = acpi_debug_trace((char *)&name, trace_debug_level,
 188                                           trace_debug_layer, 0);
 189                 if (result)
 190                         result = -EBUSY;
 191                 goto exit;
 192         }
 193
 194         if (!strncmp(val, "1", 1)) {
 195                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
 196                                           trace_debug_layer, 1);
 197                 if (result)
 198                         result = -EBUSY;
 199                 goto exit;
 200         }
 201
 202         result = -EINVAL;
 203 exit:
 204         return result;
 205 }
 206
 207 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 208 {
 209         if (!acpi_gbl_trace_method_name)
 210                 return sprintf(buffer, "disable");
 211         else {
 212                 if (acpi_gbl_trace_flags & 1)
 213                         return sprintf(buffer, "1");
 214                 else
 215                         return sprintf(buffer, "enable");
 216         }
 217         return 0;
 218 }
 219
 220 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 221                   NULL, 0644);
 222 #endif /* CONFIG_ACPI_DEBUG */
 223
 224
 225 /* /sys/modules/acpi/parameters/aml_debug_output */
 226
 227 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
 228                    byte, 0644);
 229 MODULE_PARM_DESC(aml_debug_output,
 230                  "To enable/disable the ACPI Debug Object output.");
 231
 232 /* /sys/module/acpi/parameters/acpica_version */
 233 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 234 {
 235         int result;
 236
 237         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 238
 239         return result;
 240 }
 241
 242 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 243
 244 /*
 245  * ACPI table sysfs I/F:
 246  * /sys/firmware/acpi/tables/
 247  * /sys/firmware/acpi/tables/dynamic/
 248  */
 249
 250 static LIST_HEAD(acpi_table_attr_list);
 251 static struct kobject *tables_kobj;
 252 static struct kobject *dynamic_tables_kobj;
 253 static struct kobject *hotplug_kobj;
 254
 255 struct acpi_table_attr {
 256         struct bin_attribute attr;
 257         char name[8];
 258         int instance;
 259         struct list_head node;
 260 };
 261
 262 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 263                                struct bin_attribute *bin_attr, char *buf,
 264                                loff_t offset, size_t count)
 265 {
 266         struct acpi_table_attr *table_attr =
 267             container_of(bin_attr, struct acpi_table_attr, attr);
 268         struct acpi_table_header *table_header = NULL;
 269         acpi_status status;
 270         char name[ACPI_NAME_SIZE];
 271
 272         if (strncmp(table_attr->name, "NULL", 4))
 273                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 274         else
 275                 memcpy(name, "\0\0\0\0", 4);
 276
 277         status = acpi_get_table(name, table_attr->instance, &table_header);
 278         if (ACPI_FAILURE(status))
 279                 return -ENODEV;
 280
 281         return memory_read_from_buffer(buf, count, &offset,
 282                                        table_header, table_header->length);
 283 }
 284
 285 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 286                                  struct acpi_table_header *table_header)
 287 {
 288         struct acpi_table_header *header = NULL;
 289         struct acpi_table_attr *attr = NULL;
 290
 291         sysfs_attr_init(&table_attr->attr.attr);
 292         if (table_header->signature[0] != '\0')
 293                 memcpy(table_attr->name, table_header->signature,
 294                        ACPI_NAME_SIZE);
 295         else
 296                 memcpy(table_attr->name, "NULL", 4);
 297
 298         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 299                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 300                         if (table_attr->instance < attr->instance)
 301                                 table_attr->instance = attr->instance;
 302         }
 303         table_attr->instance++;
 304
 305         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 306                                          !acpi_get_table
 307                                          (table_header->signature, 2, &header)))
 308                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 309                         table_attr->instance);
 310
 311         table_attr->attr.size = table_header->length;
 312         table_attr->attr.read = acpi_table_show;
 313         table_attr->attr.attr.name = table_attr->name;
 314         table_attr->attr.attr.mode = 0400;
 315
 316         return;
 317 }
 318
 319 static acpi_status
 320 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 321 {
 322         struct acpi_table_attr *table_attr;
 323
 324         switch (event) {
 325         case ACPI_TABLE_EVENT_LOAD:
 326                 table_attr =
 327                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 328                 if (!table_attr)
 329                         return AE_NO_MEMORY;
 330
 331                 acpi_table_attr_init(table_attr, table);
 332                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 333                                           &table_attr->attr)) {
 334                         kfree(table_attr);
 335                         return AE_ERROR;
 336                 } else
 337                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 338                 break;
 339         case ACPI_TABLE_EVENT_UNLOAD:
 340                 /*
 341                  * we do not need to do anything right now
 342                  * because the table is not deleted from the
 343                  * global table list when unloading it.
 344                  */
 345                 break;
 346         default:
 347                 return AE_BAD_PARAMETER;
 348         }
 349         return AE_OK;
 350 }
 351
 352 static int acpi_tables_sysfs_init(void)
 353 {
 354         struct acpi_table_attr *table_attr;
 355         struct acpi_table_header *table_header = NULL;
 356         int table_index;
 357         acpi_status status;
 358         int ret;
 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         for (table_index = 0;; table_index++) {
 369                 status = acpi_get_table_by_index(table_index, &table_header);
 370
 371                 if (status == AE_BAD_PARAMETER)
 372                         break;
 373
 374                 if (ACPI_FAILURE(status))
 375                         continue;
 376
 377                 table_attr = NULL;
 378                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
 379                 if (!table_attr)
 380                         return -ENOMEM;
 381
 382                 acpi_table_attr_init(table_attr, table_header);
 383                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
 384                 if (ret) {
 385                         kfree(table_attr);
 386                         return ret;
 387                 }
 388                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
 389         }
 390
 391         kobject_uevent(tables_kobj, KOBJ_ADD);
 392         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 393         status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 394
 395         return ACPI_FAILURE(status) ? -EINVAL : 0;
 396 err_dynamic_tables:
 397         kobject_put(tables_kobj);
 398 err:
 399         return -ENOMEM;
 400 }
 401
 402 /*
 403  * Detailed ACPI IRQ counters:
 404  * /sys/firmware/acpi/interrupts/
 405  */
 406
 407 u32 acpi_irq_handled;
 408 u32 acpi_irq_not_handled;
 409
 410 #define COUNT_GPE 0
 411 #define COUNT_SCI 1             /* acpi_irq_handled */
 412 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 413 #define COUNT_ERROR 3           /* other */
 414 #define NUM_COUNTERS_EXTRA 4
 415
 416 struct event_counter {
 417         u32 count;
 418         u32 flags;
 419 };
 420
 421 static struct event_counter *all_counters;
 422 static u32 num_gpes;
 423 static u32 num_counters;
 424 static struct attribute **all_attrs;
 425 static u32 acpi_gpe_count;
 426
 427 static struct attribute_group interrupt_stats_attr_group = {
 428         .name = "interrupts",
 429 };
 430
 431 static struct kobj_attribute *counter_attrs;
 432
 433 static void delete_gpe_attr_array(void)
 434 {
 435         struct event_counter *tmp = all_counters;
 436
 437         all_counters = NULL;
 438         kfree(tmp);
 439
 440         if (counter_attrs) {
 441                 int i;
 442
 443                 for (i = 0; i < num_gpes; i++)
 444                         kfree(counter_attrs[i].attr.name);
 445
 446                 kfree(counter_attrs);
 447         }
 448         kfree(all_attrs);
 449
 450         return;
 451 }
 452
 453 static void gpe_count(u32 gpe_number)
 454 {
 455         acpi_gpe_count++;
 456
 457         if (!all_counters)
 458                 return;
 459
 460         if (gpe_number < num_gpes)
 461                 all_counters[gpe_number].count++;
 462         else
 463                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 464                              COUNT_ERROR].count++;
 465
 466         return;
 467 }
 468
 469 static void fixed_event_count(u32 event_number)
 470 {
 471         if (!all_counters)
 472                 return;
 473
 474         if (event_number < ACPI_NUM_FIXED_EVENTS)
 475                 all_counters[num_gpes + event_number].count++;
 476         else
 477                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 478                              COUNT_ERROR].count++;
 479
 480         return;
 481 }
 482
 483 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 484         u32 event_number, void *context)
 485 {
 486         if (event_type == ACPI_EVENT_TYPE_GPE)
 487                 gpe_count(event_number);
 488
 489         if (event_type == ACPI_EVENT_TYPE_FIXED)
 490                 fixed_event_count(event_number);
 491 }
 492
 493 static int get_status(u32 index, acpi_event_status *status,
 494                       acpi_handle *handle)
 495 {
 496         int result = 0;
 497
 498         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 499                 goto end;
 500
 501         if (index < num_gpes) {
 502                 result = acpi_get_gpe_device(index, handle);
 503                 if (result) {
 504                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 505                                         "Invalid GPE 0x%x", index));
 506                         goto end;
 507                 }
 508                 result = acpi_get_gpe_status(*handle, index, status);
 509         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 510                 result = acpi_get_event_status(index - num_gpes, status);
 511
 512 end:
 513         return result;
 514 }
 515
 516 static ssize_t counter_show(struct kobject *kobj,
 517                             struct kobj_attribute *attr, char *buf)
 518 {
 519         int index = attr - counter_attrs;
 520         int size;
 521         acpi_handle handle;
 522         acpi_event_status status;
 523         int result = 0;
 524
 525         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 526             acpi_irq_handled;
 527         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 528             acpi_irq_not_handled;
 529         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 530             acpi_gpe_count;
 531         size = sprintf(buf, "%8u", all_counters[index].count);
 532
 533         /* "gpe_all" or "sci" */
 534         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 535                 goto end;
 536
 537         result = get_status(index, &status, &handle);
 538         if (result)
 539                 goto end;
 540
 541         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
 542                 size += sprintf(buf + size, "   invalid");
 543         else if (status & ACPI_EVENT_FLAG_ENABLED)
 544                 size += sprintf(buf + size, "   enabled");
 545         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 546                 size += sprintf(buf + size, "   wake_enabled");
 547         else
 548                 size += sprintf(buf + size, "   disabled");
 549
 550 end:
 551         size += sprintf(buf + size, "\n");
 552         return result ? result : size;
 553 }
 554
 555 /*
 556  * counter_set() sets the specified counter.
 557  * setting the total "sci" file to any value clears all counters.
 558  * enable/disable/clear a gpe/fixed event in user space.
 559  */
 560 static ssize_t counter_set(struct kobject *kobj,
 561                            struct kobj_attribute *attr, const char *buf,
 562                            size_t size)
 563 {
 564         int index = attr - counter_attrs;
 565         acpi_event_status status;
 566         acpi_handle handle;
 567         int result = 0;
 568         unsigned long tmp;
 569
 570         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 571                 int i;
 572                 for (i = 0; i < num_counters; ++i)
 573                         all_counters[i].count = 0;
 574                 acpi_gpe_count = 0;
 575                 acpi_irq_handled = 0;
 576                 acpi_irq_not_handled = 0;
 577                 goto end;
 578         }
 579
 580         /* show the event status for both GPEs and Fixed Events */
 581         result = get_status(index, &status, &handle);
 582         if (result)
 583                 goto end;
 584
 585         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
 586                 printk(KERN_WARNING PREFIX
 587                        "Can not change Invalid GPE/Fixed Event status\n");
 588                 return -EINVAL;
 589         }
 590
 591         if (index < num_gpes) {
 592                 if (!strcmp(buf, "disable\n") &&
 593                     (status & ACPI_EVENT_FLAG_ENABLED))
 594                         result = acpi_disable_gpe(handle, index);
 595                 else if (!strcmp(buf, "enable\n") &&
 596                          !(status & ACPI_EVENT_FLAG_ENABLED))
 597                         result = acpi_enable_gpe(handle, index);
 598                 else if (!strcmp(buf, "clear\n") &&
 599                          (status & ACPI_EVENT_FLAG_SET))
 600                         result = acpi_clear_gpe(handle, index);
 601                 else if (!kstrtoul(buf, 0, &tmp))
 602                         all_counters[index].count = tmp;
 603                 else
 604                         result = -EINVAL;
 605         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 606                 int event = index - num_gpes;
 607                 if (!strcmp(buf, "disable\n") &&
 608                     (status & ACPI_EVENT_FLAG_ENABLED))
 609                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 610                 else if (!strcmp(buf, "enable\n") &&
 611                          !(status & ACPI_EVENT_FLAG_ENABLED))
 612                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 613                 else if (!strcmp(buf, "clear\n") &&
 614                          (status & ACPI_EVENT_FLAG_SET))
 615                         result = acpi_clear_event(event);
 616                 else if (!kstrtoul(buf, 0, &tmp))
 617                         all_counters[index].count = tmp;
 618                 else
 619                         result = -EINVAL;
 620         } else
 621                 all_counters[index].count = strtoul(buf, NULL, 0);
 622
 623         if (ACPI_FAILURE(result))
 624                 result = -EINVAL;
 625 end:
 626         return result ? result : size;
 627 }
 628
 629 void acpi_irq_stats_init(void)
 630 {
 631         acpi_status status;
 632         int i;
 633
 634         if (all_counters)
 635                 return;
 636
 637         num_gpes = acpi_current_gpe_count;
 638         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 639
 640         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 641                             GFP_KERNEL);
 642         if (all_attrs == NULL)
 643                 return;
 644
 645         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 646                                GFP_KERNEL);
 647         if (all_counters == NULL)
 648                 goto fail;
 649
 650         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 651         if (ACPI_FAILURE(status))
 652                 goto fail;
 653
 654         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 655                                 GFP_KERNEL);
 656         if (counter_attrs == NULL)
 657                 goto fail;
 658
 659         for (i = 0; i < num_counters; ++i) {
 660                 char buffer[12];
 661                 char *name;
 662
 663                 if (i < num_gpes)
 664                         sprintf(buffer, "gpe%02X", i);
 665                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 666                         sprintf(buffer, "ff_pmtimer");
 667                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 668                         sprintf(buffer, "ff_gbl_lock");
 669                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 670                         sprintf(buffer, "ff_pwr_btn");
 671                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 672                         sprintf(buffer, "ff_slp_btn");
 673                 else if (i == num_gpes + ACPI_EVENT_RTC)
 674                         sprintf(buffer, "ff_rt_clk");
 675                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 676                         sprintf(buffer, "gpe_all");
 677                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 678                         sprintf(buffer, "sci");
 679                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 680                         sprintf(buffer, "sci_not");
 681                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 682                         sprintf(buffer, "error");
 683                 else
 684                         sprintf(buffer, "bug%02X", i);
 685
 686                 name = kstrdup(buffer, GFP_KERNEL);
 687                 if (name == NULL)
 688                         goto fail;
 689
 690                 sysfs_attr_init(&counter_attrs[i].attr);
 691                 counter_attrs[i].attr.name = name;
 692                 counter_attrs[i].attr.mode = 0644;
 693                 counter_attrs[i].show = counter_show;
 694                 counter_attrs[i].store = counter_set;
 695
 696                 all_attrs[i] = &counter_attrs[i].attr;
 697         }
 698
 699         interrupt_stats_attr_group.attrs = all_attrs;
 700         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 701                 return;
 702
 703 fail:
 704         delete_gpe_attr_array();
 705         return;
 706 }
 707
 708 static void __exit interrupt_stats_exit(void)
 709 {
 710         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 711
 712         delete_gpe_attr_array();
 713
 714         return;
 715 }
 716
 717 static ssize_t
 718 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 719                   char *buf)
 720 {
 721         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 722 }
 723
 724 static const struct device_attribute pm_profile_attr =
 725         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 726
 727 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 728                                     struct kobj_attribute *attr, char *buf)
 729 {
 730         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 731
 732         return sprintf(buf, "%d\n", hotplug->enabled);
 733 }
 734
 735 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 736                                      struct kobj_attribute *attr,
 737                                      const char *buf, size_t size)
 738 {
 739         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 740         unsigned int val;
 741
 742         if (kstrtouint(buf, 10, &val) || val > 1)
 743                 return -EINVAL;
 744
 745         acpi_scan_hotplug_enabled(hotplug, val);
 746         return size;
 747 }
 748
 749 static struct kobj_attribute hotplug_enabled_attr =
 750         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 751                 hotplug_enabled_store);
 752
 753 static struct attribute *hotplug_profile_attrs[] = {
 754         &hotplug_enabled_attr.attr,
 755         NULL
 756 };
 757
 758 static struct kobj_type acpi_hotplug_profile_ktype = {
 759         .sysfs_ops = &kobj_sysfs_ops,
 760         .default_attrs = hotplug_profile_attrs,
 761 };
 762
 763 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 764                                     const char *name)
 765 {
 766         int error;
 767
 768         if (!hotplug_kobj)
 769                 goto err_out;
 770
 771         error = kobject_init_and_add(&hotplug->kobj,
 772                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
 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 static ssize_t force_remove_show(struct kobject *kobj,
 784                                  struct kobj_attribute *attr, char *buf)
 785 {
 786         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
 787 }
 788
 789 static ssize_t force_remove_store(struct kobject *kobj,
 790                                   struct kobj_attribute *attr,
 791                                   const char *buf, size_t size)
 792 {
 793         bool val;
 794         int ret;
 795
 796         ret = strtobool(buf, &val);
 797         if (ret < 0)
 798                 return ret;
 799
 800         lock_device_hotplug();
 801         acpi_force_hot_remove = val;
 802         unlock_device_hotplug();
 803         return size;
 804 }
 805
 806 static const struct kobj_attribute force_remove_attr =
 807         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
 808                force_remove_store);
 809
 810 int __init acpi_sysfs_init(void)
 811 {
 812         int result;
 813
 814         result = acpi_tables_sysfs_init();
 815         if (result)
 816                 return result;
 817
 818         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 819         result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
 820         if (result)
 821                 return result;
 822
 823         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 824         return result;
 825 }