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 static acpi_status
 382 acpi_sysfs_table_handler(u32 event, void *table, void *context)
 383 {
 384         struct acpi_table_attr *table_attr;
 385
 386         switch (event) {
 387         case ACPI_TABLE_EVENT_LOAD:
 388                 table_attr =
 389                     kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
 390                 if (!table_attr)
 391                         return AE_NO_MEMORY;
 392
 393                 acpi_table_attr_init(table_attr, table);
 394                 if (sysfs_create_bin_file(dynamic_tables_kobj,
 395                                           &table_attr->attr)) {
 396                         kfree(table_attr);
 397                         return AE_ERROR;
 398                 } else
 399                         list_add_tail(&table_attr->node, &acpi_table_attr_list);
 400                 break;
 401         case ACPI_TABLE_EVENT_UNLOAD:
 402                 /*
 403                  * we do not need to do anything right now
 404                  * because the table is not deleted from the
 405                  * global table list when unloading it.
 406                  */
 407                 break;
 408         default:
 409                 return AE_BAD_PARAMETER;
 410         }
 411         return AE_OK;
 412 }
 413
 414 static int acpi_tables_sysfs_init(void)
 415 {
 416         struct acpi_table_attr *table_attr;
 417         struct acpi_table_header *table_header = NULL;
 418         int table_index;
 419         acpi_status status;
 420         int ret;
 421
 422         tables_kobj = kobject_create_and_add("tables", acpi_kobj);
 423         if (!tables_kobj)
 424                 goto err;
 425
 426         dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
 427         if (!dynamic_tables_kobj)
 428                 goto err_dynamic_tables;
 429
 430         for (table_index = 0;; table_index++) {
 431                 status = acpi_get_table_by_index(table_index, &table_header);
 432
 433                 if (status == AE_BAD_PARAMETER)
 434                         break;
 435
 436                 if (ACPI_FAILURE(status))
 437                         continue;
 438
 439                 table_attr = NULL;
 440                 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
 441                 if (!table_attr)
 442                         return -ENOMEM;
 443
 444                 acpi_table_attr_init(table_attr, table_header);
 445                 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
 446                 if (ret) {
 447                         kfree(table_attr);
 448                         return ret;
 449                 }
 450                 list_add_tail(&table_attr->node, &acpi_table_attr_list);
 451         }
 452
 453         kobject_uevent(tables_kobj, KOBJ_ADD);
 454         kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
 455         status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
 456
 457         return ACPI_FAILURE(status) ? -EINVAL : 0;
 458 err_dynamic_tables:
 459         kobject_put(tables_kobj);
 460 err:
 461         return -ENOMEM;
 462 }
 463
 464 /*
 465  * Detailed ACPI IRQ counters:
 466  * /sys/firmware/acpi/interrupts/
 467  */
 468
 469 u32 acpi_irq_handled;
 470 u32 acpi_irq_not_handled;
 471
 472 #define COUNT_GPE 0
 473 #define COUNT_SCI 1             /* acpi_irq_handled */
 474 #define COUNT_SCI_NOT 2         /* acpi_irq_not_handled */
 475 #define COUNT_ERROR 3           /* other */
 476 #define NUM_COUNTERS_EXTRA 4
 477
 478 struct event_counter {
 479         u32 count;
 480         u32 flags;
 481 };
 482
 483 static struct event_counter *all_counters;
 484 static u32 num_gpes;
 485 static u32 num_counters;
 486 static struct attribute **all_attrs;
 487 static u32 acpi_gpe_count;
 488
 489 static struct attribute_group interrupt_stats_attr_group = {
 490         .name = "interrupts",
 491 };
 492
 493 static struct kobj_attribute *counter_attrs;
 494
 495 static void delete_gpe_attr_array(void)
 496 {
 497         struct event_counter *tmp = all_counters;
 498
 499         all_counters = NULL;
 500         kfree(tmp);
 501
 502         if (counter_attrs) {
 503                 int i;
 504
 505                 for (i = 0; i < num_gpes; i++)
 506                         kfree(counter_attrs[i].attr.name);
 507
 508                 kfree(counter_attrs);
 509         }
 510         kfree(all_attrs);
 511
 512         return;
 513 }
 514
 515 static void gpe_count(u32 gpe_number)
 516 {
 517         acpi_gpe_count++;
 518
 519         if (!all_counters)
 520                 return;
 521
 522         if (gpe_number < num_gpes)
 523                 all_counters[gpe_number].count++;
 524         else
 525                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 526                              COUNT_ERROR].count++;
 527
 528         return;
 529 }
 530
 531 static void fixed_event_count(u32 event_number)
 532 {
 533         if (!all_counters)
 534                 return;
 535
 536         if (event_number < ACPI_NUM_FIXED_EVENTS)
 537                 all_counters[num_gpes + event_number].count++;
 538         else
 539                 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
 540                              COUNT_ERROR].count++;
 541
 542         return;
 543 }
 544
 545 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
 546         u32 event_number, void *context)
 547 {
 548         if (event_type == ACPI_EVENT_TYPE_GPE)
 549                 gpe_count(event_number);
 550
 551         if (event_type == ACPI_EVENT_TYPE_FIXED)
 552                 fixed_event_count(event_number);
 553 }
 554
 555 static int get_status(u32 index, acpi_event_status *status,
 556                       acpi_handle *handle)
 557 {
 558         int result;
 559
 560         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 561                 return -EINVAL;
 562
 563         if (index < num_gpes) {
 564                 result = acpi_get_gpe_device(index, handle);
 565                 if (result) {
 566                         ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
 567                                         "Invalid GPE 0x%x", index));
 568                         return result;
 569                 }
 570                 result = acpi_get_gpe_status(*handle, index, status);
 571         } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 572                 result = acpi_get_event_status(index - num_gpes, status);
 573
 574         return result;
 575 }
 576
 577 static ssize_t counter_show(struct kobject *kobj,
 578                             struct kobj_attribute *attr, char *buf)
 579 {
 580         int index = attr - counter_attrs;
 581         int size;
 582         acpi_handle handle;
 583         acpi_event_status status;
 584         int result = 0;
 585
 586         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
 587             acpi_irq_handled;
 588         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
 589             acpi_irq_not_handled;
 590         all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
 591             acpi_gpe_count;
 592         size = sprintf(buf, "%8u", all_counters[index].count);
 593
 594         /* "gpe_all" or "sci" */
 595         if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
 596                 goto end;
 597
 598         result = get_status(index, &status, &handle);
 599         if (result)
 600                 goto end;
 601
 602         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
 603                 size += sprintf(buf + size, "   invalid");
 604         else if (status & ACPI_EVENT_FLAG_ENABLED)
 605                 size += sprintf(buf + size, "   enabled");
 606         else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
 607                 size += sprintf(buf + size, "   wake_enabled");
 608         else
 609                 size += sprintf(buf + size, "   disabled");
 610
 611 end:
 612         size += sprintf(buf + size, "\n");
 613         return result ? result : size;
 614 }
 615
 616 /*
 617  * counter_set() sets the specified counter.
 618  * setting the total "sci" file to any value clears all counters.
 619  * enable/disable/clear a gpe/fixed event in user space.
 620  */
 621 static ssize_t counter_set(struct kobject *kobj,
 622                            struct kobj_attribute *attr, const char *buf,
 623                            size_t size)
 624 {
 625         int index = attr - counter_attrs;
 626         acpi_event_status status;
 627         acpi_handle handle;
 628         int result = 0;
 629         unsigned long tmp;
 630
 631         if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
 632                 int i;
 633                 for (i = 0; i < num_counters; ++i)
 634                         all_counters[i].count = 0;
 635                 acpi_gpe_count = 0;
 636                 acpi_irq_handled = 0;
 637                 acpi_irq_not_handled = 0;
 638                 goto end;
 639         }
 640
 641         /* show the event status for both GPEs and Fixed Events */
 642         result = get_status(index, &status, &handle);
 643         if (result)
 644                 goto end;
 645
 646         if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
 647                 printk(KERN_WARNING PREFIX
 648                        "Can not change Invalid GPE/Fixed Event status\n");
 649                 return -EINVAL;
 650         }
 651
 652         if (index < num_gpes) {
 653                 if (!strcmp(buf, "disable\n") &&
 654                     (status & ACPI_EVENT_FLAG_ENABLED))
 655                         result = acpi_disable_gpe(handle, index);
 656                 else if (!strcmp(buf, "enable\n") &&
 657                          !(status & ACPI_EVENT_FLAG_ENABLED))
 658                         result = acpi_enable_gpe(handle, index);
 659                 else if (!strcmp(buf, "clear\n") &&
 660                          (status & ACPI_EVENT_FLAG_SET))
 661                         result = acpi_clear_gpe(handle, index);
 662                 else if (!kstrtoul(buf, 0, &tmp))
 663                         all_counters[index].count = tmp;
 664                 else
 665                         result = -EINVAL;
 666         } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
 667                 int event = index - num_gpes;
 668                 if (!strcmp(buf, "disable\n") &&
 669                     (status & ACPI_EVENT_FLAG_ENABLED))
 670                         result = acpi_disable_event(event, ACPI_NOT_ISR);
 671                 else if (!strcmp(buf, "enable\n") &&
 672                          !(status & ACPI_EVENT_FLAG_ENABLED))
 673                         result = acpi_enable_event(event, ACPI_NOT_ISR);
 674                 else if (!strcmp(buf, "clear\n") &&
 675                          (status & ACPI_EVENT_FLAG_SET))
 676                         result = acpi_clear_event(event);
 677                 else if (!kstrtoul(buf, 0, &tmp))
 678                         all_counters[index].count = tmp;
 679                 else
 680                         result = -EINVAL;
 681         } else
 682                 all_counters[index].count = strtoul(buf, NULL, 0);
 683
 684         if (ACPI_FAILURE(result))
 685                 result = -EINVAL;
 686 end:
 687         return result ? result : size;
 688 }
 689
 690 void acpi_irq_stats_init(void)
 691 {
 692         acpi_status status;
 693         int i;
 694
 695         if (all_counters)
 696                 return;
 697
 698         num_gpes = acpi_current_gpe_count;
 699         num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
 700
 701         all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
 702                             GFP_KERNEL);
 703         if (all_attrs == NULL)
 704                 return;
 705
 706         all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
 707                                GFP_KERNEL);
 708         if (all_counters == NULL)
 709                 goto fail;
 710
 711         status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
 712         if (ACPI_FAILURE(status))
 713                 goto fail;
 714
 715         counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
 716                                 GFP_KERNEL);
 717         if (counter_attrs == NULL)
 718                 goto fail;
 719
 720         for (i = 0; i < num_counters; ++i) {
 721                 char buffer[12];
 722                 char *name;
 723
 724                 if (i < num_gpes)
 725                         sprintf(buffer, "gpe%02X", i);
 726                 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
 727                         sprintf(buffer, "ff_pmtimer");
 728                 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
 729                         sprintf(buffer, "ff_gbl_lock");
 730                 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
 731                         sprintf(buffer, "ff_pwr_btn");
 732                 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
 733                         sprintf(buffer, "ff_slp_btn");
 734                 else if (i == num_gpes + ACPI_EVENT_RTC)
 735                         sprintf(buffer, "ff_rt_clk");
 736                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
 737                         sprintf(buffer, "gpe_all");
 738                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
 739                         sprintf(buffer, "sci");
 740                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
 741                         sprintf(buffer, "sci_not");
 742                 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
 743                         sprintf(buffer, "error");
 744                 else
 745                         sprintf(buffer, "bug%02X", i);
 746
 747                 name = kstrdup(buffer, GFP_KERNEL);
 748                 if (name == NULL)
 749                         goto fail;
 750
 751                 sysfs_attr_init(&counter_attrs[i].attr);
 752                 counter_attrs[i].attr.name = name;
 753                 counter_attrs[i].attr.mode = 0644;
 754                 counter_attrs[i].show = counter_show;
 755                 counter_attrs[i].store = counter_set;
 756
 757                 all_attrs[i] = &counter_attrs[i].attr;
 758         }
 759
 760         interrupt_stats_attr_group.attrs = all_attrs;
 761         if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
 762                 return;
 763
 764 fail:
 765         delete_gpe_attr_array();
 766         return;
 767 }
 768
 769 static void __exit interrupt_stats_exit(void)
 770 {
 771         sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
 772
 773         delete_gpe_attr_array();
 774
 775         return;
 776 }
 777
 778 static ssize_t
 779 acpi_show_profile(struct device *dev, struct device_attribute *attr,
 780                   char *buf)
 781 {
 782         return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
 783 }
 784
 785 static const struct device_attribute pm_profile_attr =
 786         __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
 787
 788 static ssize_t hotplug_enabled_show(struct kobject *kobj,
 789                                     struct kobj_attribute *attr, char *buf)
 790 {
 791         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 792
 793         return sprintf(buf, "%d\n", hotplug->enabled);
 794 }
 795
 796 static ssize_t hotplug_enabled_store(struct kobject *kobj,
 797                                      struct kobj_attribute *attr,
 798                                      const char *buf, size_t size)
 799 {
 800         struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
 801         unsigned int val;
 802
 803         if (kstrtouint(buf, 10, &val) || val > 1)
 804                 return -EINVAL;
 805
 806         acpi_scan_hotplug_enabled(hotplug, val);
 807         return size;
 808 }
 809
 810 static struct kobj_attribute hotplug_enabled_attr =
 811         __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
 812                 hotplug_enabled_store);
 813
 814 static struct attribute *hotplug_profile_attrs[] = {
 815         &hotplug_enabled_attr.attr,
 816         NULL
 817 };
 818
 819 static struct kobj_type acpi_hotplug_profile_ktype = {
 820         .sysfs_ops = &kobj_sysfs_ops,
 821         .default_attrs = hotplug_profile_attrs,
 822 };
 823
 824 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
 825                                     const char *name)
 826 {
 827         int error;
 828
 829         if (!hotplug_kobj)
 830                 goto err_out;
 831
 832         error = kobject_init_and_add(&hotplug->kobj,
 833                 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
 834         if (error)
 835                 goto err_out;
 836
 837         kobject_uevent(&hotplug->kobj, KOBJ_ADD);
 838         return;
 839
 840  err_out:
 841         pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
 842 }
 843
 844 static ssize_t force_remove_show(struct kobject *kobj,
 845                                  struct kobj_attribute *attr, char *buf)
 846 {
 847         return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
 848 }
 849
 850 static ssize_t force_remove_store(struct kobject *kobj,
 851                                   struct kobj_attribute *attr,
 852                                   const char *buf, size_t size)
 853 {
 854         bool val;
 855         int ret;
 856
 857         ret = strtobool(buf, &val);
 858         if (ret < 0)
 859                 return ret;
 860
 861         lock_device_hotplug();
 862         acpi_force_hot_remove = val;
 863         unlock_device_hotplug();
 864         return size;
 865 }
 866
 867 static const struct kobj_attribute force_remove_attr =
 868         __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
 869                force_remove_store);
 870
 871 int __init acpi_sysfs_init(void)
 872 {
 873         int result;
 874
 875         result = acpi_tables_sysfs_init();
 876         if (result)
 877                 return result;
 878
 879         hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
 880         if (!hotplug_kobj)
 881                 return -ENOMEM;
 882
 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 }