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         ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
  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[1024];
 168
 169 int param_set_trace_method_name(const char *val, const struct kernel_param *kp)
 170 {
 171         u32 saved_flags = 0;
 172         bool is_abs_path = true;
 173
 174         if (*val != '\\')
 175                 is_abs_path = false;
 176
 177         if ((is_abs_path && strlen(val) > 1023) ||
 178             (!is_abs_path && strlen(val) > 1022)) {
 179                 pr_err("%s: string parameter too long\n", kp->name);
 180                 return -ENOSPC;
 181         }
 182
 183         /*
 184          * It's not safe to update acpi_gbl_trace_method_name without
 185          * having the tracer stopped, so we save the original tracer
 186          * state and disable it.
 187          */
 188         saved_flags = acpi_gbl_trace_flags;
 189         (void)acpi_debug_trace(NULL,
 190                                acpi_gbl_trace_dbg_level,
 191                                acpi_gbl_trace_dbg_layer,
 192                                0);
 193
 194         /* This is a hack.  We can't kmalloc in early boot. */
 195         if (is_abs_path)
 196                 strcpy(trace_method_name, val);
 197         else {
 198                 trace_method_name[0] = '\\';
 199                 strcpy(trace_method_name+1, val);
 200         }
 201
 202         /* Restore the original tracer state */
 203         (void)acpi_debug_trace(trace_method_name,
 204                                acpi_gbl_trace_dbg_level,
 205                                acpi_gbl_trace_dbg_layer,
 206                                saved_flags);
 207
 208         return 0;
 209 }
 210
 211 static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp)
 212 {
 213         return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name);
 214 }
 215
 216 static const struct kernel_param_ops param_ops_trace_method = {
 217         .set = param_set_trace_method_name,
 218         .get = param_get_trace_method_name,
 219 };
 220
 221 static const struct kernel_param_ops param_ops_trace_attrib = {
 222         .set = param_set_uint,
 223         .get = param_get_uint,
 224 };
 225
 226 module_param_cb(trace_method_name, &param_ops_trace_method, &trace_method_name, 0644);
 227 module_param_cb(trace_debug_layer, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
 228 module_param_cb(trace_debug_level, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644);
 229
 230 static int param_set_trace_state(const char *val, struct kernel_param *kp)
 231 {
 232         acpi_status status;
 233         const char *method = trace_method_name;
 234         u32 flags = 0;
 235
 236 /* So "xxx-once" comparison should go prior than "xxx" comparison */
 237 #define acpi_compare_param(val, key)    \
 238         strncmp((val), (key), sizeof(key) - 1)
 239
 240         if (!acpi_compare_param(val, "enable")) {
 241                 method = NULL;
 242                 flags = ACPI_TRACE_ENABLED;
 243         } else if (!acpi_compare_param(val, "disable"))
 244                 method = NULL;
 245         else if (!acpi_compare_param(val, "method-once"))
 246                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT;
 247         else if (!acpi_compare_param(val, "method"))
 248                 flags = ACPI_TRACE_ENABLED;
 249         else if (!acpi_compare_param(val, "opcode-once"))
 250                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE;
 251         else if (!acpi_compare_param(val, "opcode"))
 252                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE;
 253         else
 254                 return -EINVAL;
 255
 256         status = acpi_debug_trace(method,
 257                                   acpi_gbl_trace_dbg_level,
 258                                   acpi_gbl_trace_dbg_layer,
 259                                   flags);
 260         if (ACPI_FAILURE(status))
 261                 return -EBUSY;
 262
 263         return 0;
 264 }
 265
 266 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 267 {
 268         if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
 269                 return sprintf(buffer, "disable");
 270         else {
 271                 if (acpi_gbl_trace_method_name) {
 272                         if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
 273                                 return sprintf(buffer, "method-once");
 274                         else
 275                                 return sprintf(buffer, "method");
 276                 } else
 277                         return sprintf(buffer, "enable");
 278         }
 279         return 0;
 280 }
 281
 282 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 283                   NULL, 0644);
 284 #endif /* CONFIG_ACPI_DEBUG */
 285
 286
 287 /* /sys/modules/acpi/parameters/aml_debug_output */
 288
 289 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
 290                    byte, 0644);
 291 MODULE_PARM_DESC(aml_debug_output,
 292                  "To enable/disable the ACPI Debug Object output.");
 293
 294 /* /sys/module/acpi/parameters/acpica_version */
 295 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 296 {
 297         int result;
 298
 299         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 300
 301         return result;
 302 }
 303
 304 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 305
 306 /*
 307  * ACPI table sysfs I/F:
 308  * /sys/firmware/acpi/tables/
 309  * /sys/firmware/acpi/tables/dynamic/
 310  */
 311
 312 static LIST_HEAD(acpi_table_attr_list);
 313 static struct kobject *tables_kobj;
 314 static struct kobject *dynamic_tables_kobj;
 315 static struct kobject *hotplug_kobj;
 316
 317 struct acpi_table_attr {
 318         struct bin_attribute attr;
 319         char name[8];
 320         int instance;
 321         struct list_head node;
 322 };
 323
 324 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 325                                struct bin_attribute *bin_attr, char *buf,
 326                                loff_t offset, size_t count)
 327 {
 328         struct acpi_table_attr *table_attr =
 329             container_of(bin_attr, struct acpi_table_attr, attr);
 330         struct acpi_table_header *table_header = NULL;
 331         acpi_status status;
 332         char name[ACPI_NAME_SIZE];
 333
 334         if (strncmp(table_attr->name, "NULL", 4))
 335                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 336         else
 337                 memcpy(name, "\0\0\0\0", 4);
 338
 339         status = acpi_get_table(name, table_attr->instance, &table_header);
 340         if (ACPI_FAILURE(status))
 341                 return -ENODEV;
 342
 343         return memory_read_from_buffer(buf, count, &offset,
 344                                        table_header, table_header->length);
 345 }
 346
 347 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 348                                  struct acpi_table_header *table_header)
 349 {
 350         struct acpi_table_header *header = NULL;
 351         struct acpi_table_attr *attr = NULL;
 352
 353         sysfs_attr_init(&table_attr->attr.attr);
 354         if (table_header->signature[0] != '\0')
 355                 memcpy(table_attr->name, table_header->signature,
 356                        ACPI_NAME_SIZE);
 357         else
 358                 memcpy(table_attr->name, "NULL", 4);
 359
 360         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 361                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 362                         if (table_attr->instance < attr->instance)
 363                                 table_attr->instance = attr->instance;
 364         }
 365         table_attr->instance++;
 366
 367         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 368                                          !acpi_get_table
 369                                          (table_header->signature, 2, &header)))
 370                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 371                         table_attr->instance);
 372
 373         table_attr->attr.size = table_header->length;
 374         table_attr->attr.read = acpi_table_show;
 375         table_attr->attr.attr.name = table_attr->name;
 376         table_attr->attr.attr.mode = 0400;
 377
 378         return;
 379 }
 380
 381 acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
 382 {
 383         struct acpi_table_attr *table_attr;
 384
 385         switch (event) {
 386         case ACPI_TABLE_EVENT_LOAD:
 387                 table_attr =
 388                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 389                 if (!table_attr)
 390                         return AE_NO_MEMORY;
 391
 392                 acpi_table_attr_init(table_attr, table);
 393                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 394                                           &table_attr->attr)) {
 395                         kfree(table_attr);
 396                         return AE_ERROR;
 397                 } else
 398                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 399                 break;
 400         case ACPI_TABLE_EVENT_UNLOAD:
 401                 /*
 402                  * we do not need to do anything right now
 403                  * because the table is not deleted from the
 404                  * global table list when unloading it.
 405                  */
 406                 break;
 407         default:
 408                 return AE_BAD_PARAMETER;
 409         }
 410         return AE_OK;
 411 }
 412
 413 static int acpi_tables_sysfs_init(void)
 414 {
 415         struct acpi_table_attr *table_attr;
 416         struct acpi_table_header *table_header = NULL;
 417         int table_index;
 418         acpi_status status;
 419         int ret;
 420
 421         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 422         if (!tables_kobj)
 423                 goto err;
 424
 425         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 426         if (!dynamic_tables_kobj)
 427                 goto err_dynamic_tables;
 428
 429         for (table_index = 0;; table_index++) {
 430                 status = acpi_get_table_by_index(table_index, &table_header);
 431
 432                 if (status == AE_BAD_PARAMETER)
 433                         break;
 434
 435                 if (ACPI_FAILURE(status))
 436                         continue;
 437
 438                 table_attr = NULL;
 439                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
 440                 if (!table_attr)
 441                         return -ENOMEM;
 442
 443                 acpi_table_attr_init(table_attr, table_header);
 444                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
 445                 if (ret) {
 446                         kfree(table_attr);
 447                         return ret;
 448                 }
 449                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
 450         }
 451
 452         kobject_uevent(tables_kobj, KOBJ_ADD);
 453         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 454
 455         return 0;
 456 err_dynamic_tables:
 457         kobject_put(tables_kobj);
 458 err:
 459         return -ENOMEM;
 460 }
 461
 462 /*
 463  * Detailed ACPI IRQ counters:
 464  * /sys/firmware/acpi/interrupts/
 465  */
 466
 467 u32 acpi_irq_handled;
 468 u32 acpi_irq_not_handled;
 469
 470 #define COUNT_GPE 0
 471 #define COUNT_SCI 1             /* acpi_irq_handled */
 472 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 473 #define COUNT_ERROR 3           /* other */
 474 #define NUM_COUNTERS_EXTRA 4
 475
 476 struct event_counter {
 477         u32 count;
 478         u32 flags;
 479 };
 480
 481 static struct event_counter *all_counters;
 482 static u32 num_gpes;
 483 static u32 num_counters;
 484 static struct attribute **all_attrs;
 485 static u32 acpi_gpe_count;
 486
 487 static struct attribute_group interrupt_stats_attr_group = {
 488         .name = "interrupts",
 489 };
 490
 491 static struct kobj_attribute *counter_attrs;
 492
 493 static void delete_gpe_attr_array(void)
 494 {
 495         struct event_counter *tmp = all_counters;
 496
 497         all_counters = NULL;
 498         kfree(tmp);
 499
 500         if (counter_attrs) {
 501                 int i;
 502
 503                 for (i = 0; i < num_gpes; i++)
 504                         kfree(counter_attrs[i].attr.name);
 505
 506                 kfree(counter_attrs);
 507         }
 508         kfree(all_attrs);
 509
 510         return;
 511 }
 512
 513 static void gpe_count(u32 gpe_number)
 514 {
 515         acpi_gpe_count++;
 516
 517         if (!all_counters)
 518                 return;
 519
 520         if (gpe_number < num_gpes)
 521                 all_counters[gpe_number].count++;
 522         else
 523                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 524                              COUNT_ERROR].count++;
 525
 526         return;
 527 }
 528
 529 static void fixed_event_count(u32 event_number)
 530 {
 531         if (!all_counters)
 532                 return;
 533
 534         if (event_number < ACPI_NUM_FIXED_EVENTS)
 535                 all_counters[num_gpes + event_number].count++;
 536         else
 537                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 538                              COUNT_ERROR].count++;
 539
 540         return;
 541 }
 542
 543 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 544         u32 event_number, void *context)
 545 {
 546         if (event_type == ACPI_EVENT_TYPE_GPE)
 547                 gpe_count(event_number);
 548
 549         if (event_type == ACPI_EVENT_TYPE_FIXED)
 550                 fixed_event_count(event_number);
 551 }
 552
 553 static int get_status(u32 index, acpi_event_status *status,
 554                       acpi_handle *handle)
 555 {
 556         int result;
 557
 558         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 559                 return -EINVAL;
 560
 561         if (index < num_gpes) {
 562                 result = acpi_get_gpe_device(index, handle);
 563                 if (result) {
 564                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 565                                         "Invalid GPE 0x%x", index));
 566                         return result;
 567                 }
 568                 result = acpi_get_gpe_status(*handle, index, status);
 569         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 570                 result = acpi_get_event_status(index - num_gpes, status);
 571
 572         return result;
 573 }
 574
 575 static ssize_t counter_show(struct kobject *kobj,
 576                             struct kobj_attribute *attr, char *buf)
 577 {
 578         int index = attr - counter_attrs;
 579         int size;
 580         acpi_handle handle;
 581         acpi_event_status status;
 582         int result = 0;
 583
 584         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 585             acpi_irq_handled;
 586         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 587             acpi_irq_not_handled;
 588         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 589             acpi_gpe_count;
 590         size = sprintf(buf, "%8u", all_counters[index].count);
 591
 592         /* "gpe_all" or "sci" */
 593         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 594                 goto end;
 595
 596         result = get_status(index, &status, &handle);
 597         if (result)
 598                 goto end;
 599
 600         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
 601                 size += sprintf(buf + size, "   invalid");
 602         else if (status & ACPI_EVENT_FLAG_ENABLED)
 603                 size += sprintf(buf + size, "   enabled");
 604         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 605                 size += sprintf(buf + size, "   wake_enabled");
 606         else
 607                 size += sprintf(buf + size, "   disabled");
 608
 609 end:
 610         size += sprintf(buf + size, "\n");
 611         return result ? result : size;
 612 }
 613
 614 /*
 615  * counter_set() sets the specified counter.
 616  * setting the total "sci" file to any value clears all counters.
 617  * enable/disable/clear a gpe/fixed event in user space.
 618  */
 619 static ssize_t counter_set(struct kobject *kobj,
 620                            struct kobj_attribute *attr, const char *buf,
 621                            size_t size)
 622 {
 623         int index = attr - counter_attrs;
 624         acpi_event_status status;
 625         acpi_handle handle;
 626         int result = 0;
 627         unsigned long tmp;
 628
 629         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 630                 int i;
 631                 for (i = 0; i < num_counters; ++i)
 632                         all_counters[i].count = 0;
 633                 acpi_gpe_count = 0;
 634                 acpi_irq_handled = 0;
 635                 acpi_irq_not_handled = 0;
 636                 goto end;
 637         }
 638
 639         /* show the event status for both GPEs and Fixed Events */
 640         result = get_status(index, &status, &handle);
 641         if (result)
 642                 goto end;
 643
 644         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
 645                 printk(KERN_WARNING PREFIX
 646                        "Can not change Invalid GPE/Fixed Event status\n");
 647                 return -EINVAL;
 648         }
 649
 650         if (index < num_gpes) {
 651                 if (!strcmp(buf, "disable\n") &&
 652                     (status & ACPI_EVENT_FLAG_ENABLED))
 653                         result = acpi_disable_gpe(handle, index);
 654                 else if (!strcmp(buf, "enable\n") &&
 655                          !(status & ACPI_EVENT_FLAG_ENABLED))
 656                         result = acpi_enable_gpe(handle, index);
 657                 else if (!strcmp(buf, "clear\n") &&
 658                          (status & ACPI_EVENT_FLAG_SET))
 659                         result = acpi_clear_gpe(handle, index);
 660                 else if (!kstrtoul(buf, 0, &tmp))
 661                         all_counters[index].count = tmp;
 662                 else
 663                         result = -EINVAL;
 664         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 665                 int event = index - num_gpes;
 666                 if (!strcmp(buf, "disable\n") &&
 667                     (status & ACPI_EVENT_FLAG_ENABLED))
 668                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 669                 else if (!strcmp(buf, "enable\n") &&
 670                          !(status & ACPI_EVENT_FLAG_ENABLED))
 671                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 672                 else if (!strcmp(buf, "clear\n") &&
 673                          (status & ACPI_EVENT_FLAG_SET))
 674                         result = acpi_clear_event(event);
 675                 else if (!kstrtoul(buf, 0, &tmp))
 676                         all_counters[index].count = tmp;
 677                 else
 678                         result = -EINVAL;
 679         } else
 680                 all_counters[index].count = strtoul(buf, NULL, 0);
 681
 682         if (ACPI_FAILURE(result))
 683                 result = -EINVAL;
 684 end:
 685         return result ? result : size;
 686 }
 687
 688 void acpi_irq_stats_init(void)
 689 {
 690         acpi_status status;
 691         int i;
 692
 693         if (all_counters)
 694                 return;
 695
 696         num_gpes = acpi_current_gpe_count;
 697         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 698
 699         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 700                             GFP_KERNEL);
 701         if (all_attrs == NULL)
 702                 return;
 703
 704         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 705                                GFP_KERNEL);
 706         if (all_counters == NULL)
 707                 goto fail;
 708
 709         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 710         if (ACPI_FAILURE(status))
 711                 goto fail;
 712
 713         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 714                                 GFP_KERNEL);
 715         if (counter_attrs == NULL)
 716                 goto fail;
 717
 718         for (i = 0; i < num_counters; ++i) {
 719                 char buffer[12];
 720                 char *name;
 721
 722                 if (i < num_gpes)
 723                         sprintf(buffer, "gpe%02X", i);
 724                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 725                         sprintf(buffer, "ff_pmtimer");
 726                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 727                         sprintf(buffer, "ff_gbl_lock");
 728                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 729                         sprintf(buffer, "ff_pwr_btn");
 730                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 731                         sprintf(buffer, "ff_slp_btn");
 732                 else if (i == num_gpes + ACPI_EVENT_RTC)
 733                         sprintf(buffer, "ff_rt_clk");
 734                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 735                         sprintf(buffer, "gpe_all");
 736                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 737                         sprintf(buffer, "sci");
 738                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 739                         sprintf(buffer, "sci_not");
 740                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 741                         sprintf(buffer, "error");
 742                 else
 743                         sprintf(buffer, "bug%02X", i);
 744
 745                 name = kstrdup(buffer, GFP_KERNEL);
 746                 if (name == NULL)
 747                         goto fail;
 748
 749                 sysfs_attr_init(&counter_attrs[i].attr);
 750                 counter_attrs[i].attr.name = name;
 751                 counter_attrs[i].attr.mode = 0644;
 752                 counter_attrs[i].show = counter_show;
 753                 counter_attrs[i].store = counter_set;
 754
 755                 all_attrs[i] = &counter_attrs[i].attr;
 756         }
 757
 758         interrupt_stats_attr_group.attrs = all_attrs;
 759         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 760                 return;
 761
 762 fail:
 763         delete_gpe_attr_array();
 764         return;
 765 }
 766
 767 static void __exit interrupt_stats_exit(void)
 768 {
 769         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 770
 771         delete_gpe_attr_array();
 772
 773         return;
 774 }
 775
 776 static ssize_t
 777 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 778                   char *buf)
 779 {
 780         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 781 }
 782
 783 static const struct device_attribute pm_profile_attr =
 784         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 785
 786 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 787                                     struct kobj_attribute *attr, char *buf)
 788 {
 789         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 790
 791         return sprintf(buf, "%d\n", hotplug->enabled);
 792 }
 793
 794 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 795                                      struct kobj_attribute *attr,
 796                                      const char *buf, size_t size)
 797 {
 798         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 799         unsigned int val;
 800
 801         if (kstrtouint(buf, 10, &val) || val > 1)
 802                 return -EINVAL;
 803
 804         acpi_scan_hotplug_enabled(hotplug, val);
 805         return size;
 806 }
 807
 808 static struct kobj_attribute hotplug_enabled_attr =
 809         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 810                 hotplug_enabled_store);
 811
 812 static struct attribute *hotplug_profile_attrs[] = {
 813         &hotplug_enabled_attr.attr,
 814         NULL
 815 };
 816
 817 static struct kobj_type acpi_hotplug_profile_ktype = {
 818         .sysfs_ops = &kobj_sysfs_ops,
 819         .default_attrs = hotplug_profile_attrs,
 820 };
 821
 822 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 823                                     const char *name)
 824 {
 825         int error;
 826
 827         if (!hotplug_kobj)
 828                 goto err_out;
 829
 830         error = kobject_init_and_add(&hotplug->kobj,
 831                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
 832         if (error)
 833                 goto err_out;
 834
 835         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
 836         return;
 837
 838  err_out:
 839         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
 840 }
 841
 842 static ssize_t force_remove_show(struct kobject *kobj,
 843                                  struct kobj_attribute *attr, char *buf)
 844 {
 845         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
 846 }
 847
 848 static ssize_t force_remove_store(struct kobject *kobj,
 849                                   struct kobj_attribute *attr,
 850                                   const char *buf, size_t size)
 851 {
 852         bool val;
 853         int ret;
 854
 855         ret = strtobool(buf, &val);
 856         if (ret < 0)
 857                 return ret;
 858
 859         lock_device_hotplug();
 860         acpi_force_hot_remove = val;
 861         unlock_device_hotplug();
 862         return size;
 863 }
 864
 865 static const struct kobj_attribute force_remove_attr =
 866         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
 867                force_remove_store);
 868
 869 int __init acpi_sysfs_init(void)
 870 {
 871         int result;
 872
 873         result = acpi_tables_sysfs_init();
 874         if (result)
 875                 return result;
 876
 877         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 878         if (!hotplug_kobj)
 879                 return -ENOMEM;
 880
 881         result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
 882         if (result)
 883                 return result;
 884
 885         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 886         return result;
 887 }