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;
 168 static bool trace_method_kmalloced;
 169
 170 int param_set_trace_method_name(const char *val, const struct kernel_param *kp)
 171 {
 172         u32 saved_flags = 0;
 173
 174         if (strlen(val) > 1024) {
 175                 pr_err("%s: string parameter too long\n", kp->name);
 176                 return -ENOSPC;
 177         }
 178
 179         /*
 180          * It's not safe to update acpi_gbl_trace_method_name without
 181          * having the tracer stopped, so we save the original tracer
 182          * state and disable it.
 183          */
 184         saved_flags = acpi_gbl_trace_flags;
 185         (void)acpi_debug_trace(NULL,
 186                                acpi_gbl_trace_dbg_level,
 187                                acpi_gbl_trace_dbg_layer,
 188                                0);
 189
 190         if (trace_method_kmalloced)
 191                 kfree(trace_method_name);
 192         trace_method_name = NULL;
 193         trace_method_kmalloced = false;
 194
 195         /* This is a hack.  We can't kmalloc in early boot. */
 196         if (slab_is_available()) {
 197                 trace_method_name = kstrdup(val, GFP_KERNEL);
 198                 if (!trace_method_name)
 199                         return -ENOMEM;
 200                 trace_method_kmalloced = true;
 201         } else
 202                 trace_method_name = (char *)val;
 203
 204         /* Restore the original tracer state */
 205         (void)acpi_debug_trace(trace_method_name,
 206                                acpi_gbl_trace_dbg_level,
 207                                acpi_gbl_trace_dbg_layer,
 208                                saved_flags);
 209
 210         return 0;
 211 }
 212
 213 static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp)
 214 {
 215         return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name);
 216 }
 217
 218 static const struct kernel_param_ops param_ops_trace_method = {
 219         .set = param_set_trace_method_name,
 220         .get = param_get_trace_method_name,
 221 };
 222
 223 static const struct kernel_param_ops param_ops_trace_attrib = {
 224         .set = param_set_uint,
 225         .get = param_get_uint,
 226 };
 227
 228 module_param_cb(trace_method_name, &param_ops_trace_method, &trace_method_name, 0644);
 229 module_param_cb(trace_debug_layer, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
 230 module_param_cb(trace_debug_level, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644);
 231
 232 static int param_set_trace_state(const char *val, struct kernel_param *kp)
 233 {
 234         acpi_status status;
 235         const char *method = trace_method_name;
 236         u32 flags = 0;
 237
 238 /* So "xxx-once" comparison should go prior than "xxx" comparison */
 239 #define acpi_compare_param(val, key)    \
 240         strncmp((val), (key), sizeof(key) - 1)
 241
 242         if (!acpi_compare_param(val, "enable")) {
 243                 method = NULL;
 244                 flags = ACPI_TRACE_ENABLED;
 245         } else if (!acpi_compare_param(val, "disable"))
 246                 method = NULL;
 247         else if (!acpi_compare_param(val, "method-once"))
 248                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT;
 249         else if (!acpi_compare_param(val, "method"))
 250                 flags = ACPI_TRACE_ENABLED;
 251         else if (!acpi_compare_param(val, "opcode-once"))
 252                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE;
 253         else if (!acpi_compare_param(val, "opcode"))
 254                 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE;
 255         else
 256                 return -EINVAL;
 257
 258         status = acpi_debug_trace(method,
 259                                   acpi_gbl_trace_dbg_level,
 260                                   acpi_gbl_trace_dbg_layer,
 261                                   flags);
 262         if (ACPI_FAILURE(status))
 263                 return -EBUSY;
 264
 265         return 0;
 266 }
 267
 268 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 269 {
 270         if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
 271                 return sprintf(buffer, "disable");
 272         else {
 273                 if (acpi_gbl_trace_method_name) {
 274                         if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
 275                                 return sprintf(buffer, "method-once");
 276                         else
 277                                 return sprintf(buffer, "method");
 278                 } else
 279                         return sprintf(buffer, "enable");
 280         }
 281         return 0;
 282 }
 283
 284 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
 285                   NULL, 0644);
 286 #endif /* CONFIG_ACPI_DEBUG */
 287
 288
 289 /* /sys/modules/acpi/parameters/aml_debug_output */
 290
 291 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
 292                    byte, 0644);
 293 MODULE_PARM_DESC(aml_debug_output,
 294                  "To enable/disable the ACPI Debug Object output.");
 295
 296 /* /sys/module/acpi/parameters/acpica_version */
 297 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
 298 {
 299         int result;
 300
 301         result = sprintf(buffer, "%x", ACPI_CA_VERSION);
 302
 303         return result;
 304 }
 305
 306 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
 307
 308 /*
 309  * ACPI table sysfs I/F:
 310  * /sys/firmware/acpi/tables/
 311  * /sys/firmware/acpi/tables/dynamic/
 312  */
 313
 314 static LIST_HEAD(acpi_table_attr_list);
 315 static struct kobject *tables_kobj;
 316 static struct kobject *dynamic_tables_kobj;
 317 static struct kobject *hotplug_kobj;
 318
 319 struct acpi_table_attr {
 320         struct bin_attribute attr;
 321         char name[8];
 322         int instance;
 323         struct list_head node;
 324 };
 325
 326 static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 327                                struct bin_attribute *bin_attr, char *buf,
 328                                loff_t offset, size_t count)
 329 {
 330         struct acpi_table_attr *table_attr =
 331             container_of(bin_attr, struct acpi_table_attr, attr);
 332         struct acpi_table_header *table_header = NULL;
 333         acpi_status status;
 334         char name[ACPI_NAME_SIZE];
 335
 336         if (strncmp(table_attr->name, "NULL", 4))
 337                 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
 338         else
 339                 memcpy(name, "\0\0\0\0", 4);
 340
 341         status = acpi_get_table(name, table_attr->instance, &table_header);
 342         if (ACPI_FAILURE(status))
 343                 return -ENODEV;
 344
 345         return memory_read_from_buffer(buf, count, &offset,
 346                                        table_header, table_header->length);
 347 }
 348
 349 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
 350                                  struct acpi_table_header *table_header)
 351 {
 352         struct acpi_table_header *header = NULL;
 353         struct acpi_table_attr *attr = NULL;
 354
 355         sysfs_attr_init(&table_attr->attr.attr);
 356         if (table_header->signature[0] != '\0')
 357                 memcpy(table_attr->name, table_header->signature,
 358                        ACPI_NAME_SIZE);
 359         else
 360                 memcpy(table_attr->name, "NULL", 4);
 361
 362         list_for_each_entry(attr, &acpi_table_attr_list, node) {
 363                 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
 364                         if (table_attr->instance < attr->instance)
 365                                 table_attr->instance = attr->instance;
 366         }
 367         table_attr->instance++;
 368
 369         if (table_attr->instance > 1 || (table_attr->instance == 1 &&
 370                                          !acpi_get_table
 371                                          (table_header->signature, 2, &header)))
 372                 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
 373                         table_attr->instance);
 374
 375         table_attr->attr.size = table_header->length;
 376         table_attr->attr.read = acpi_table_show;
 377         table_attr->attr.attr.name = table_attr->name;
 378         table_attr->attr.attr.mode = 0400;
 379
 380         return;
 381 }
 382
 383 static acpi_status
 384 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 385 {
 386         struct acpi_table_attr *table_attr;
 387
 388         switch (event) {
 389         case ACPI_TABLE_EVENT_LOAD:
 390                 table_attr =
 391                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 392                 if (!table_attr)
 393                         return AE_NO_MEMORY;
 394
 395                 acpi_table_attr_init(table_attr, table);
 396                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 397                                           &table_attr->attr)) {
 398                         kfree(table_attr);
 399                         return AE_ERROR;
 400                 } else
 401                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 402                 break;
 403         case ACPI_TABLE_EVENT_UNLOAD:
 404                 /*
 405                  * we do not need to do anything right now
 406                  * because the table is not deleted from the
 407                  * global table list when unloading it.
 408                  */
 409                 break;
 410         default:
 411                 return AE_BAD_PARAMETER;
 412         }
 413         return AE_OK;
 414 }
 415
 416 static int acpi_tables_sysfs_init(void)
 417 {
 418         struct acpi_table_attr *table_attr;
 419         struct acpi_table_header *table_header = NULL;
 420         int table_index;
 421         acpi_status status;
 422         int ret;
 423
 424         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 425         if (!tables_kobj)
 426                 goto err;
 427
 428         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 429         if (!dynamic_tables_kobj)
 430                 goto err_dynamic_tables;
 431
 432         for (table_index = 0;; table_index++) {
 433                 status = acpi_get_table_by_index(table_index, &table_header);
 434
 435                 if (status == AE_BAD_PARAMETER)
 436                         break;
 437
 438                 if (ACPI_FAILURE(status))
 439                         continue;
 440
 441                 table_attr = NULL;
 442                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
 443                 if (!table_attr)
 444                         return -ENOMEM;
 445
 446                 acpi_table_attr_init(table_attr, table_header);
 447                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
 448                 if (ret) {
 449                         kfree(table_attr);
 450                         return ret;
 451                 }
 452                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
 453         }
 454
 455         kobject_uevent(tables_kobj, KOBJ_ADD);
 456         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 457         status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 458
 459         return ACPI_FAILURE(status) ? -EINVAL : 0;
 460 err_dynamic_tables:
 461         kobject_put(tables_kobj);
 462 err:
 463         return -ENOMEM;
 464 }
 465
 466 /*
 467  * Detailed ACPI IRQ counters:
 468  * /sys/firmware/acpi/interrupts/
 469  */
 470
 471 u32 acpi_irq_handled;
 472 u32 acpi_irq_not_handled;
 473
 474 #define COUNT_GPE 0
 475 #define COUNT_SCI 1             /* acpi_irq_handled */
 476 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 477 #define COUNT_ERROR 3           /* other */
 478 #define NUM_COUNTERS_EXTRA 4
 479
 480 struct event_counter {
 481         u32 count;
 482         u32 flags;
 483 };
 484
 485 static struct event_counter *all_counters;
 486 static u32 num_gpes;
 487 static u32 num_counters;
 488 static struct attribute **all_attrs;
 489 static u32 acpi_gpe_count;
 490
 491 static struct attribute_group interrupt_stats_attr_group = {
 492         .name = "interrupts",
 493 };
 494
 495 static struct kobj_attribute *counter_attrs;
 496
 497 static void delete_gpe_attr_array(void)
 498 {
 499         struct event_counter *tmp = all_counters;
 500
 501         all_counters = NULL;
 502         kfree(tmp);
 503
 504         if (counter_attrs) {
 505                 int i;
 506
 507                 for (i = 0; i < num_gpes; i++)
 508                         kfree(counter_attrs[i].attr.name);
 509
 510                 kfree(counter_attrs);
 511         }
 512         kfree(all_attrs);
 513
 514         return;
 515 }
 516
 517 static void gpe_count(u32 gpe_number)
 518 {
 519         acpi_gpe_count++;
 520
 521         if (!all_counters)
 522                 return;
 523
 524         if (gpe_number < num_gpes)
 525                 all_counters[gpe_number].count++;
 526         else
 527                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 528                              COUNT_ERROR].count++;
 529
 530         return;
 531 }
 532
 533 static void fixed_event_count(u32 event_number)
 534 {
 535         if (!all_counters)
 536                 return;
 537
 538         if (event_number < ACPI_NUM_FIXED_EVENTS)
 539                 all_counters[num_gpes + event_number].count++;
 540         else
 541                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 542                              COUNT_ERROR].count++;
 543
 544         return;
 545 }
 546
 547 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 548         u32 event_number, void *context)
 549 {
 550         if (event_type == ACPI_EVENT_TYPE_GPE)
 551                 gpe_count(event_number);
 552
 553         if (event_type == ACPI_EVENT_TYPE_FIXED)
 554                 fixed_event_count(event_number);
 555 }
 556
 557 static int get_status(u32 index, acpi_event_status *status,
 558                       acpi_handle *handle)
 559 {
 560         int result = 0;
 561
 562         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 563                 goto end;
 564
 565         if (index < num_gpes) {
 566                 result = acpi_get_gpe_device(index, handle);
 567                 if (result) {
 568                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 569                                         "Invalid GPE 0x%x", index));
 570                         goto end;
 571                 }
 572                 result = acpi_get_gpe_status(*handle, index, status);
 573         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 574                 result = acpi_get_event_status(index - num_gpes, status);
 575
 576 end:
 577         return result;
 578 }
 579
 580 static ssize_t counter_show(struct kobject *kobj,
 581                             struct kobj_attribute *attr, char *buf)
 582 {
 583         int index = attr - counter_attrs;
 584         int size;
 585         acpi_handle handle;
 586         acpi_event_status status;
 587         int result = 0;
 588
 589         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 590             acpi_irq_handled;
 591         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 592             acpi_irq_not_handled;
 593         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 594             acpi_gpe_count;
 595         size = sprintf(buf, "%8u", all_counters[index].count);
 596
 597         /* "gpe_all" or "sci" */
 598         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 599                 goto end;
 600
 601         result = get_status(index, &status, &handle);
 602         if (result)
 603                 goto end;
 604
 605         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
 606                 size += sprintf(buf + size, "   invalid");
 607         else if (status & ACPI_EVENT_FLAG_ENABLED)
 608                 size += sprintf(buf + size, "   enabled");
 609         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 610                 size += sprintf(buf + size, "   wake_enabled");
 611         else
 612                 size += sprintf(buf + size, "   disabled");
 613
 614 end:
 615         size += sprintf(buf + size, "\n");
 616         return result ? result : size;
 617 }
 618
 619 /*
 620  * counter_set() sets the specified counter.
 621  * setting the total "sci" file to any value clears all counters.
 622  * enable/disable/clear a gpe/fixed event in user space.
 623  */
 624 static ssize_t counter_set(struct kobject *kobj,
 625                            struct kobj_attribute *attr, const char *buf,
 626                            size_t size)
 627 {
 628         int index = attr - counter_attrs;
 629         acpi_event_status status;
 630         acpi_handle handle;
 631         int result = 0;
 632         unsigned long tmp;
 633
 634         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 635                 int i;
 636                 for (i = 0; i < num_counters; ++i)
 637                         all_counters[i].count = 0;
 638                 acpi_gpe_count = 0;
 639                 acpi_irq_handled = 0;
 640                 acpi_irq_not_handled = 0;
 641                 goto end;
 642         }
 643
 644         /* show the event status for both GPEs and Fixed Events */
 645         result = get_status(index, &status, &handle);
 646         if (result)
 647                 goto end;
 648
 649         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
 650                 printk(KERN_WARNING PREFIX
 651                        "Can not change Invalid GPE/Fixed Event status\n");
 652                 return -EINVAL;
 653         }
 654
 655         if (index < num_gpes) {
 656                 if (!strcmp(buf, "disable\n") &&
 657                     (status & ACPI_EVENT_FLAG_ENABLED))
 658                         result = acpi_disable_gpe(handle, index);
 659                 else if (!strcmp(buf, "enable\n") &&
 660                          !(status & ACPI_EVENT_FLAG_ENABLED))
 661                         result = acpi_enable_gpe(handle, index);
 662                 else if (!strcmp(buf, "clear\n") &&
 663                          (status & ACPI_EVENT_FLAG_SET))
 664                         result = acpi_clear_gpe(handle, index);
 665                 else if (!kstrtoul(buf, 0, &tmp))
 666                         all_counters[index].count = tmp;
 667                 else
 668                         result = -EINVAL;
 669         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 670                 int event = index - num_gpes;
 671                 if (!strcmp(buf, "disable\n") &&
 672                     (status & ACPI_EVENT_FLAG_ENABLED))
 673                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 674                 else if (!strcmp(buf, "enable\n") &&
 675                          !(status & ACPI_EVENT_FLAG_ENABLED))
 676                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 677                 else if (!strcmp(buf, "clear\n") &&
 678                          (status & ACPI_EVENT_FLAG_SET))
 679                         result = acpi_clear_event(event);
 680                 else if (!kstrtoul(buf, 0, &tmp))
 681                         all_counters[index].count = tmp;
 682                 else
 683                         result = -EINVAL;
 684         } else
 685                 all_counters[index].count = strtoul(buf, NULL, 0);
 686
 687         if (ACPI_FAILURE(result))
 688                 result = -EINVAL;
 689 end:
 690         return result ? result : size;
 691 }
 692
 693 void acpi_irq_stats_init(void)
 694 {
 695         acpi_status status;
 696         int i;
 697
 698         if (all_counters)
 699                 return;
 700
 701         num_gpes = acpi_current_gpe_count;
 702         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 703
 704         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 705                             GFP_KERNEL);
 706         if (all_attrs == NULL)
 707                 return;
 708
 709         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 710                                GFP_KERNEL);
 711         if (all_counters == NULL)
 712                 goto fail;
 713
 714         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 715         if (ACPI_FAILURE(status))
 716                 goto fail;
 717
 718         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 719                                 GFP_KERNEL);
 720         if (counter_attrs == NULL)
 721                 goto fail;
 722
 723         for (i = 0; i < num_counters; ++i) {
 724                 char buffer[12];
 725                 char *name;
 726
 727                 if (i < num_gpes)
 728                         sprintf(buffer, "gpe%02X", i);
 729                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 730                         sprintf(buffer, "ff_pmtimer");
 731                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 732                         sprintf(buffer, "ff_gbl_lock");
 733                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 734                         sprintf(buffer, "ff_pwr_btn");
 735                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 736                         sprintf(buffer, "ff_slp_btn");
 737                 else if (i == num_gpes + ACPI_EVENT_RTC)
 738                         sprintf(buffer, "ff_rt_clk");
 739                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 740                         sprintf(buffer, "gpe_all");
 741                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 742                         sprintf(buffer, "sci");
 743                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 744                         sprintf(buffer, "sci_not");
 745                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 746                         sprintf(buffer, "error");
 747                 else
 748                         sprintf(buffer, "bug%02X", i);
 749
 750                 name = kstrdup(buffer, GFP_KERNEL);
 751                 if (name == NULL)
 752                         goto fail;
 753
 754                 sysfs_attr_init(&counter_attrs[i].attr);
 755                 counter_attrs[i].attr.name = name;
 756                 counter_attrs[i].attr.mode = 0644;
 757                 counter_attrs[i].show = counter_show;
 758                 counter_attrs[i].store = counter_set;
 759
 760                 all_attrs[i] = &counter_attrs[i].attr;
 761         }
 762
 763         interrupt_stats_attr_group.attrs = all_attrs;
 764         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 765                 return;
 766
 767 fail:
 768         delete_gpe_attr_array();
 769         return;
 770 }
 771
 772 static void __exit interrupt_stats_exit(void)
 773 {
 774         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 775
 776         delete_gpe_attr_array();
 777
 778         return;
 779 }
 780
 781 static ssize_t
 782 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 783                   char *buf)
 784 {
 785         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 786 }
 787
 788 static const struct device_attribute pm_profile_attr =
 789         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 790
 791 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 792                                     struct kobj_attribute *attr, char *buf)
 793 {
 794         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 795
 796         return sprintf(buf, "%d\n", hotplug->enabled);
 797 }
 798
 799 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 800                                      struct kobj_attribute *attr,
 801                                      const char *buf, size_t size)
 802 {
 803         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 804         unsigned int val;
 805
 806         if (kstrtouint(buf, 10, &val) || val > 1)
 807                 return -EINVAL;
 808
 809         acpi_scan_hotplug_enabled(hotplug, val);
 810         return size;
 811 }
 812
 813 static struct kobj_attribute hotplug_enabled_attr =
 814         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 815                 hotplug_enabled_store);
 816
 817 static struct attribute *hotplug_profile_attrs[] = {
 818         &hotplug_enabled_attr.attr,
 819         NULL
 820 };
 821
 822 static struct kobj_type acpi_hotplug_profile_ktype = {
 823         .sysfs_ops = &kobj_sysfs_ops,
 824         .default_attrs = hotplug_profile_attrs,
 825 };
 826
 827 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 828                                     const char *name)
 829 {
 830         int error;
 831
 832         if (!hotplug_kobj)
 833                 goto err_out;
 834
 835         error = kobject_init_and_add(&hotplug->kobj,
 836                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
 837         if (error)
 838                 goto err_out;
 839
 840         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
 841         return;
 842
 843  err_out:
 844         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
 845 }
 846
 847 static ssize_t force_remove_show(struct kobject *kobj,
 848                                  struct kobj_attribute *attr, char *buf)
 849 {
 850         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
 851 }
 852
 853 static ssize_t force_remove_store(struct kobject *kobj,
 854                                   struct kobj_attribute *attr,
 855                                   const char *buf, size_t size)
 856 {
 857         bool val;
 858         int ret;
 859
 860         ret = strtobool(buf, &val);
 861         if (ret < 0)
 862                 return ret;
 863
 864         lock_device_hotplug();
 865         acpi_force_hot_remove = val;
 866         unlock_device_hotplug();
 867         return size;
 868 }
 869
 870 static const struct kobj_attribute force_remove_attr =
 871         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
 872                force_remove_store);
 873
 874 int __init acpi_sysfs_init(void)
 875 {
 876         int result;
 877
 878         result = acpi_tables_sysfs_init();
 879         if (result)
 880                 return result;
 881
 882         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 883         result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
 884         if (result)
 885                 return result;
 886
 887         result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
 888         return result;
 889 }