drivers/acpi/acpica/utdecode.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utdecode - Utility decoding routines (value-to-string)
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acnamesp.h"
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utdecode")
  50
  51 /*
  52  * Properties of the ACPI Object Types, both internal and external.
  53  * The table is indexed by values of acpi_object_type
  54  */
  55 const u8 acpi_gbl_ns_properties[ACPI_NUM_NS_TYPES] = {
  56         ACPI_NS_NORMAL,         /* 00 Any              */
  57         ACPI_NS_NORMAL,         /* 01 Number           */
  58         ACPI_NS_NORMAL,         /* 02 String           */
  59         ACPI_NS_NORMAL,         /* 03 Buffer           */
  60         ACPI_NS_NORMAL,         /* 04 Package          */
  61         ACPI_NS_NORMAL,         /* 05 field_unit       */
  62         ACPI_NS_NEWSCOPE,       /* 06 Device           */
  63         ACPI_NS_NORMAL,         /* 07 Event            */
  64         ACPI_NS_NEWSCOPE,       /* 08 Method           */
  65         ACPI_NS_NORMAL,         /* 09 Mutex            */
  66         ACPI_NS_NORMAL,         /* 10 Region           */
  67         ACPI_NS_NEWSCOPE,       /* 11 Power            */
  68         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
  69         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
  70         ACPI_NS_NORMAL,         /* 14 buffer_field     */
  71         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
  72         ACPI_NS_NORMAL,         /* 16 Debug Object     */
  73         ACPI_NS_NORMAL,         /* 17 def_field        */
  74         ACPI_NS_NORMAL,         /* 18 bank_field       */
  75         ACPI_NS_NORMAL,         /* 19 index_field      */
  76         ACPI_NS_NORMAL,         /* 20 Reference        */
  77         ACPI_NS_NORMAL,         /* 21 Alias            */
  78         ACPI_NS_NORMAL,         /* 22 method_alias     */
  79         ACPI_NS_NORMAL,         /* 23 Notify           */
  80         ACPI_NS_NORMAL,         /* 24 Address Handler  */
  81         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
  82         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
  83         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
  84         ACPI_NS_NORMAL,         /* 28 Extra            */
  85         ACPI_NS_NORMAL,         /* 29 Data             */
  86         ACPI_NS_NORMAL          /* 30 Invalid          */
  87 };
  88
  89 /*******************************************************************************
  90  *
  91  * FUNCTION:    acpi_ut_get_region_name
  92  *
  93  * PARAMETERS:  Space ID            - ID for the region
  94  *
  95  * RETURN:      Decoded region space_id name
  96  *
  97  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
  98  *
  99  ******************************************************************************/
 100
 101 /* Region type decoding */
 102
 103 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 104         "SystemMemory",         /* 0x00 */
 105         "SystemIO",             /* 0x01 */
 106         "PCI_Config",           /* 0x02 */
 107         "EmbeddedControl",      /* 0x03 */
 108         "SMBus",                /* 0x04 */
 109         "SystemCMOS",           /* 0x05 */
 110         "PCIBARTarget",         /* 0x06 */
 111         "IPMI",                 /* 0x07 */
 112         "GeneralPurposeIo",     /* 0x08 */
 113         "GenericSerialBus",     /* 0x09 */
 114         "PCC"                   /* 0x0A */
 115 };
 116
 117 const char *acpi_ut_get_region_name(u8 space_id)
 118 {
 119
 120         if (space_id >= ACPI_USER_REGION_BEGIN) {
 121                 return ("UserDefinedRegion");
 122         } else if (space_id == ACPI_ADR_SPACE_DATA_TABLE) {
 123                 return ("DataTable");
 124         } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
 125                 return ("FunctionalFixedHW");
 126         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
 127                 return ("InvalidSpaceId");
 128         }
 129
 130         return (acpi_gbl_region_types[space_id]);
 131 }
 132
 133 /*******************************************************************************
 134  *
 135  * FUNCTION:    acpi_ut_get_event_name
 136  *
 137  * PARAMETERS:  event_id            - Fixed event ID
 138  *
 139  * RETURN:      Decoded event ID name
 140  *
 141  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 142  *
 143  ******************************************************************************/
 144
 145 /* Event type decoding */
 146
 147 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 148         "PM_Timer",
 149         "GlobalLock",
 150         "PowerButton",
 151         "SleepButton",
 152         "RealTimeClock",
 153 };
 154
 155 const char *acpi_ut_get_event_name(u32 event_id)
 156 {
 157
 158         if (event_id > ACPI_EVENT_MAX) {
 159                 return ("InvalidEventID");
 160         }
 161
 162         return (acpi_gbl_event_types[event_id]);
 163 }
 164
 165 /*******************************************************************************
 166  *
 167  * FUNCTION:    acpi_ut_get_type_name
 168  *
 169  * PARAMETERS:  type                - An ACPI object type
 170  *
 171  * RETURN:      Decoded ACPI object type name
 172  *
 173  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 174  *
 175  ******************************************************************************/
 176
 177 /*
 178  * Elements of acpi_gbl_ns_type_names below must match
 179  * one-to-one with values of acpi_object_type
 180  *
 181  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 182  * when stored in a table it really means that we have thus far seen no
 183  * evidence to indicate what type is actually going to be stored for this
 184  & entry.
 185  */
 186 static const char acpi_gbl_bad_type[] = "UNDEFINED";
 187
 188 /* Printable names of the ACPI object types */
 189
 190 static const char *acpi_gbl_ns_type_names[] = {
 191         /* 00 */ "Untyped",
 192         /* 01 */ "Integer",
 193         /* 02 */ "String",
 194         /* 03 */ "Buffer",
 195         /* 04 */ "Package",
 196         /* 05 */ "FieldUnit",
 197         /* 06 */ "Device",
 198         /* 07 */ "Event",
 199         /* 08 */ "Method",
 200         /* 09 */ "Mutex",
 201         /* 10 */ "Region",
 202         /* 11 */ "Power",
 203         /* 12 */ "Processor",
 204         /* 13 */ "Thermal",
 205         /* 14 */ "BufferField",
 206         /* 15 */ "DdbHandle",
 207         /* 16 */ "DebugObject",
 208         /* 17 */ "RegionField",
 209         /* 18 */ "BankField",
 210         /* 19 */ "IndexField",
 211         /* 20 */ "Reference",
 212         /* 21 */ "Alias",
 213         /* 22 */ "MethodAlias",
 214         /* 23 */ "Notify",
 215         /* 24 */ "AddrHandler",
 216         /* 25 */ "ResourceDesc",
 217         /* 26 */ "ResourceFld",
 218         /* 27 */ "Scope",
 219         /* 28 */ "Extra",
 220         /* 29 */ "Data",
 221         /* 30 */ "Invalid"
 222 };
 223
 224 const char *acpi_ut_get_type_name(acpi_object_type type)
 225 {
 226
 227         if (type > ACPI_TYPE_INVALID) {
 228                 return (acpi_gbl_bad_type);
 229         }
 230
 231         return (acpi_gbl_ns_type_names[type]);
 232 }
 233
 234 const char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 235 {
 236         ACPI_FUNCTION_TRACE(ut_get_object_type_name);
 237
 238         if (!obj_desc) {
 239                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Null Object Descriptor\n"));
 240                 return_PTR("[NULL Object Descriptor]");
 241         }
 242
 243         /* These descriptor types share a common area */
 244
 245         if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) &&
 246             (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_NAMED)) {
 247                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 248                                   "Invalid object descriptor type: 0x%2.2X [%s] (%p)\n",
 249                                   ACPI_GET_DESCRIPTOR_TYPE(obj_desc),
 250                                   acpi_ut_get_descriptor_name(obj_desc),
 251                                   obj_desc));
 252
 253                 return_PTR("Invalid object");
 254         }
 255
 256         return_STR(acpi_ut_get_type_name(obj_desc->common.type));
 257 }
 258
 259 /*******************************************************************************
 260  *
 261  * FUNCTION:    acpi_ut_get_node_name
 262  *
 263  * PARAMETERS:  object               - A namespace node
 264  *
 265  * RETURN:      ASCII name of the node
 266  *
 267  * DESCRIPTION: Validate the node and return the node's ACPI name.
 268  *
 269  ******************************************************************************/
 270
 271 const char *acpi_ut_get_node_name(void *object)
 272 {
 273         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 274
 275         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
 276
 277         if (!object) {
 278                 return ("NULL");
 279         }
 280
 281         /* Check for Root node */
 282
 283         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
 284                 return ("\"\\\" ");
 285         }
 286
 287         /* Descriptor must be a namespace node */
 288
 289         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
 290                 return ("####");
 291         }
 292
 293         /*
 294          * Ensure name is valid. The name was validated/repaired when the node
 295          * was created, but make sure it has not been corrupted.
 296          */
 297         acpi_ut_repair_name(node->name.ascii);
 298
 299         /* Return the name */
 300
 301         return (node->name.ascii);
 302 }
 303
 304 /*******************************************************************************
 305  *
 306  * FUNCTION:    acpi_ut_get_descriptor_name
 307  *
 308  * PARAMETERS:  object               - An ACPI object
 309  *
 310  * RETURN:      Decoded name of the descriptor type
 311  *
 312  * DESCRIPTION: Validate object and return the descriptor type
 313  *
 314  ******************************************************************************/
 315
 316 /* Printable names of object descriptor types */
 317
 318 static const char *acpi_gbl_desc_type_names[] = {
 319         /* 00 */ "Not a Descriptor",
 320         /* 01 */ "Cached",
 321         /* 02 */ "State-Generic",
 322         /* 03 */ "State-Update",
 323         /* 04 */ "State-Package",
 324         /* 05 */ "State-Control",
 325         /* 06 */ "State-RootParseScope",
 326         /* 07 */ "State-ParseScope",
 327         /* 08 */ "State-WalkScope",
 328         /* 09 */ "State-Result",
 329         /* 10 */ "State-Notify",
 330         /* 11 */ "State-Thread",
 331         /* 12 */ "Walk",
 332         /* 13 */ "Parser",
 333         /* 14 */ "Operand",
 334         /* 15 */ "Node"
 335 };
 336
 337 const char *acpi_ut_get_descriptor_name(void *object)
 338 {
 339
 340         if (!object) {
 341                 return ("NULL OBJECT");
 342         }
 343
 344         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
 345                 return ("Not a Descriptor");
 346         }
 347
 348         return (acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE(object)]);
 349 }
 350
 351 /*******************************************************************************
 352  *
 353  * FUNCTION:    acpi_ut_get_reference_name
 354  *
 355  * PARAMETERS:  object               - An ACPI reference object
 356  *
 357  * RETURN:      Decoded name of the type of reference
 358  *
 359  * DESCRIPTION: Decode a reference object sub-type to a string.
 360  *
 361  ******************************************************************************/
 362
 363 /* Printable names of reference object sub-types */
 364
 365 static const char *acpi_gbl_ref_class_names[] = {
 366         /* 00 */ "Local",
 367         /* 01 */ "Argument",
 368         /* 02 */ "RefOf",
 369         /* 03 */ "Index",
 370         /* 04 */ "DdbHandle",
 371         /* 05 */ "Named Object",
 372         /* 06 */ "Debug"
 373 };
 374
 375 const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
 376 {
 377
 378         if (!object) {
 379                 return ("NULL Object");
 380         }
 381
 382         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
 383                 return ("Not an Operand object");
 384         }
 385
 386         if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
 387                 return ("Not a Reference object");
 388         }
 389
 390         if (object->reference.class > ACPI_REFCLASS_MAX) {
 391                 return ("Unknown Reference class");
 392         }
 393
 394         return (acpi_gbl_ref_class_names[object->reference.class]);
 395 }
 396
 397 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 398 /*
 399  * Strings and procedures used for debug only
 400  */
 401
 402 /*******************************************************************************
 403  *
 404  * FUNCTION:    acpi_ut_get_mutex_name
 405  *
 406  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 407  *
 408  * RETURN:      Decoded name of the internal mutex
 409  *
 410  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 411  *
 412  ******************************************************************************/
 413
 414 /* Names for internal mutex objects, used for debug output */
 415
 416 static const char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
 417         "ACPI_MTX_Interpreter",
 418         "ACPI_MTX_Namespace",
 419         "ACPI_MTX_Tables",
 420         "ACPI_MTX_Events",
 421         "ACPI_MTX_Caches",
 422         "ACPI_MTX_Memory",
 423 };
 424
 425 const char *acpi_ut_get_mutex_name(u32 mutex_id)
 426 {
 427
 428         if (mutex_id > ACPI_MAX_MUTEX) {
 429                 return ("Invalid Mutex ID");
 430         }
 431
 432         return (acpi_gbl_mutex_names[mutex_id]);
 433 }
 434
 435 /*******************************************************************************
 436  *
 437  * FUNCTION:    acpi_ut_get_notify_name
 438  *
 439  * PARAMETERS:  notify_value    - Value from the Notify() request
 440  *
 441  * RETURN:      Decoded name for the notify value
 442  *
 443  * DESCRIPTION: Translate a Notify Value to a notify namestring.
 444  *
 445  ******************************************************************************/
 446
 447 /* Names for Notify() values, used for debug output */
 448
 449 static const char *acpi_gbl_generic_notify[ACPI_GENERIC_NOTIFY_MAX + 1] = {
 450         /* 00 */ "Bus Check",
 451         /* 01 */ "Device Check",
 452         /* 02 */ "Device Wake",
 453         /* 03 */ "Eject Request",
 454         /* 04 */ "Device Check Light",
 455         /* 05 */ "Frequency Mismatch",
 456         /* 06 */ "Bus Mode Mismatch",
 457         /* 07 */ "Power Fault",
 458         /* 08 */ "Capabilities Check",
 459         /* 09 */ "Device PLD Check",
 460         /* 0A */ "Reserved",
 461         /* 0B */ "System Locality Update",
 462                                         /* 0C */ "Shutdown Request",
 463                                         /* Reserved in ACPI 6.0 */
 464         /* 0D */ "System Resource Affinity Update"
 465 };
 466
 467 static const char *acpi_gbl_device_notify[5] = {
 468         /* 80 */ "Status Change",
 469         /* 81 */ "Information Change",
 470         /* 82 */ "Device-Specific Change",
 471         /* 83 */ "Device-Specific Change",
 472         /* 84 */ "Reserved"
 473 };
 474
 475 static const char *acpi_gbl_processor_notify[5] = {
 476         /* 80 */ "Performance Capability Change",
 477         /* 81 */ "C-State Change",
 478         /* 82 */ "Throttling Capability Change",
 479         /* 83 */ "Guaranteed Change",
 480         /* 84 */ "Minimum Excursion"
 481 };
 482
 483 static const char *acpi_gbl_thermal_notify[5] = {
 484         /* 80 */ "Thermal Status Change",
 485         /* 81 */ "Thermal Trip Point Change",
 486         /* 82 */ "Thermal Device List Change",
 487         /* 83 */ "Thermal Relationship Change",
 488         /* 84 */ "Reserved"
 489 };
 490
 491 const char *acpi_ut_get_notify_name(u32 notify_value, acpi_object_type type)
 492 {
 493
 494         /* 00 - 0D are "common to all object types" (from ACPI Spec) */
 495
 496         if (notify_value <= ACPI_GENERIC_NOTIFY_MAX) {
 497                 return (acpi_gbl_generic_notify[notify_value]);
 498         }
 499
 500         /* 0E - 7F are reserved */
 501
 502         if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
 503                 return ("Reserved");
 504         }
 505
 506         /* 80 - 84 are per-object-type */
 507
 508         if (notify_value <= ACPI_SPECIFIC_NOTIFY_MAX) {
 509                 switch (type) {
 510                 case ACPI_TYPE_ANY:
 511                 case ACPI_TYPE_DEVICE:
 512                         return (acpi_gbl_device_notify[notify_value - 0x80]);
 513
 514                 case ACPI_TYPE_PROCESSOR:
 515                         return (acpi_gbl_processor_notify[notify_value - 0x80]);
 516
 517                 case ACPI_TYPE_THERMAL:
 518                         return (acpi_gbl_thermal_notify[notify_value - 0x80]);
 519
 520                 default:
 521                         return ("Target object type does not support notifies");
 522                 }
 523         }
 524
 525         /* 84 - BF are device-specific */
 526
 527         if (notify_value <= ACPI_MAX_DEVICE_SPECIFIC_NOTIFY) {
 528                 return ("Device-Specific");
 529         }
 530
 531         /* C0 and above are hardware-specific */
 532
 533         return ("Hardware-Specific");
 534 }
 535 #endif
 536
 537 /*******************************************************************************
 538  *
 539  * FUNCTION:    acpi_ut_valid_object_type
 540  *
 541  * PARAMETERS:  type            - Object type to be validated
 542  *
 543  * RETURN:      TRUE if valid object type, FALSE otherwise
 544  *
 545  * DESCRIPTION: Validate an object type
 546  *
 547  ******************************************************************************/
 548
 549 u8 acpi_ut_valid_object_type(acpi_object_type type)
 550 {
 551
 552         if (type > ACPI_TYPE_LOCAL_MAX) {
 553
 554                 /* Note: Assumes all TYPEs are contiguous (external/local) */
 555
 556                 return (FALSE);
 557         }
 558
 559         return (TRUE);
 560 }