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 - 2012, 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 <linux/export.h>
  45 #include <acpi/acpi.h>
  46 #include "accommon.h"
  47 #include "acnamesp.h"
  48
  49 #define _COMPONENT          ACPI_UTILITIES
  50 ACPI_MODULE_NAME("utdecode")
  51
  52 /*
  53  * Properties of the ACPI Object Types, both internal and external.
  54  * The table is indexed by values of acpi_object_type
  55  */
  56 const u8 acpi_gbl_ns_properties[ACPI_NUM_NS_TYPES] = {
  57         ACPI_NS_NORMAL,         /* 00 Any              */
  58         ACPI_NS_NORMAL,         /* 01 Number           */
  59         ACPI_NS_NORMAL,         /* 02 String           */
  60         ACPI_NS_NORMAL,         /* 03 Buffer           */
  61         ACPI_NS_NORMAL,         /* 04 Package          */
  62         ACPI_NS_NORMAL,         /* 05 field_unit       */
  63         ACPI_NS_NEWSCOPE,       /* 06 Device           */
  64         ACPI_NS_NORMAL,         /* 07 Event            */
  65         ACPI_NS_NEWSCOPE,       /* 08 Method           */
  66         ACPI_NS_NORMAL,         /* 09 Mutex            */
  67         ACPI_NS_NORMAL,         /* 10 Region           */
  68         ACPI_NS_NEWSCOPE,       /* 11 Power            */
  69         ACPI_NS_NEWSCOPE,       /* 12 Processor        */
  70         ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
  71         ACPI_NS_NORMAL,         /* 14 buffer_field     */
  72         ACPI_NS_NORMAL,         /* 15 ddb_handle       */
  73         ACPI_NS_NORMAL,         /* 16 Debug Object     */
  74         ACPI_NS_NORMAL,         /* 17 def_field        */
  75         ACPI_NS_NORMAL,         /* 18 bank_field       */
  76         ACPI_NS_NORMAL,         /* 19 index_field      */
  77         ACPI_NS_NORMAL,         /* 20 Reference        */
  78         ACPI_NS_NORMAL,         /* 21 Alias            */
  79         ACPI_NS_NORMAL,         /* 22 method_alias     */
  80         ACPI_NS_NORMAL,         /* 23 Notify           */
  81         ACPI_NS_NORMAL,         /* 24 Address Handler  */
  82         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
  83         ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
  84         ACPI_NS_NEWSCOPE,       /* 27 Scope            */
  85         ACPI_NS_NORMAL,         /* 28 Extra            */
  86         ACPI_NS_NORMAL,         /* 29 Data             */
  87         ACPI_NS_NORMAL          /* 30 Invalid          */
  88 };
  89
  90 /*******************************************************************************
  91  *
  92  * FUNCTION:    acpi_ut_hex_to_ascii_char
  93  *
  94  * PARAMETERS:  integer             - Contains the hex digit
  95  *              position            - bit position of the digit within the
  96  *                                    integer (multiple of 4)
  97  *
  98  * RETURN:      The converted Ascii character
  99  *
 100  * DESCRIPTION: Convert a hex digit to an Ascii character
 101  *
 102  ******************************************************************************/
 103
 104 /* Hex to ASCII conversion table */
 105
 106 static const char acpi_gbl_hex_to_ascii[] = {
 107         '0', '1', '2', '3', '4', '5', '6', '7',
 108         '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
 109 };
 110
 111 char acpi_ut_hex_to_ascii_char(u64 integer, u32 position)
 112 {
 113
 114         return (acpi_gbl_hex_to_ascii[(integer >> position) & 0xF]);
 115 }
 116
 117 /*******************************************************************************
 118  *
 119  * FUNCTION:    acpi_ut_get_region_name
 120  *
 121  * PARAMETERS:  Space ID            - ID for the region
 122  *
 123  * RETURN:      Decoded region space_id name
 124  *
 125  * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 126  *
 127  ******************************************************************************/
 128
 129 /* Region type decoding */
 130
 131 const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 132         "SystemMemory",         /* 0x00 */
 133         "SystemIO",             /* 0x01 */
 134         "PCI_Config",           /* 0x02 */
 135         "EmbeddedControl",      /* 0x03 */
 136         "SMBus",                /* 0x04 */
 137         "SystemCMOS",           /* 0x05 */
 138         "PCIBARTarget",         /* 0x06 */
 139         "IPMI",                 /* 0x07 */
 140         "GeneralPurposeIo",     /* 0x08 */
 141         "GenericSerialBus",     /* 0x09 */
 142         "PCC"                   /* 0x0A */
 143 };
 144
 145 char *acpi_ut_get_region_name(u8 space_id)
 146 {
 147
 148         if (space_id >= ACPI_USER_REGION_BEGIN) {
 149                 return ("UserDefinedRegion");
 150         } else if (space_id == ACPI_ADR_SPACE_DATA_TABLE) {
 151                 return ("DataTable");
 152         } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
 153                 return ("FunctionalFixedHW");
 154         } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
 155                 return ("InvalidSpaceId");
 156         }
 157
 158         return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
 159 }
 160
 161 /*******************************************************************************
 162  *
 163  * FUNCTION:    acpi_ut_get_event_name
 164  *
 165  * PARAMETERS:  event_id            - Fixed event ID
 166  *
 167  * RETURN:      Decoded event ID name
 168  *
 169  * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 170  *
 171  ******************************************************************************/
 172
 173 /* Event type decoding */
 174
 175 static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 176         "PM_Timer",
 177         "GlobalLock",
 178         "PowerButton",
 179         "SleepButton",
 180         "RealTimeClock",
 181 };
 182
 183 char *acpi_ut_get_event_name(u32 event_id)
 184 {
 185
 186         if (event_id > ACPI_EVENT_MAX) {
 187                 return ("InvalidEventID");
 188         }
 189
 190         return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
 191 }
 192
 193 /*******************************************************************************
 194  *
 195  * FUNCTION:    acpi_ut_get_type_name
 196  *
 197  * PARAMETERS:  type                - An ACPI object type
 198  *
 199  * RETURN:      Decoded ACPI object type name
 200  *
 201  * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 202  *
 203  ******************************************************************************/
 204
 205 /*
 206  * Elements of acpi_gbl_ns_type_names below must match
 207  * one-to-one with values of acpi_object_type
 208  *
 209  * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 210  * when stored in a table it really means that we have thus far seen no
 211  * evidence to indicate what type is actually going to be stored for this entry.
 212  */
 213 static const char acpi_gbl_bad_type[] = "UNDEFINED";
 214
 215 /* Printable names of the ACPI object types */
 216
 217 static const char *acpi_gbl_ns_type_names[] = {
 218         /* 00 */ "Untyped",
 219         /* 01 */ "Integer",
 220         /* 02 */ "String",
 221         /* 03 */ "Buffer",
 222         /* 04 */ "Package",
 223         /* 05 */ "FieldUnit",
 224         /* 06 */ "Device",
 225         /* 07 */ "Event",
 226         /* 08 */ "Method",
 227         /* 09 */ "Mutex",
 228         /* 10 */ "Region",
 229         /* 11 */ "Power",
 230         /* 12 */ "Processor",
 231         /* 13 */ "Thermal",
 232         /* 14 */ "BufferField",
 233         /* 15 */ "DdbHandle",
 234         /* 16 */ "DebugObject",
 235         /* 17 */ "RegionField",
 236         /* 18 */ "BankField",
 237         /* 19 */ "IndexField",
 238         /* 20 */ "Reference",
 239         /* 21 */ "Alias",
 240         /* 22 */ "MethodAlias",
 241         /* 23 */ "Notify",
 242         /* 24 */ "AddrHandler",
 243         /* 25 */ "ResourceDesc",
 244         /* 26 */ "ResourceFld",
 245         /* 27 */ "Scope",
 246         /* 28 */ "Extra",
 247         /* 29 */ "Data",
 248         /* 30 */ "Invalid"
 249 };
 250
 251 char *acpi_ut_get_type_name(acpi_object_type type)
 252 {
 253
 254         if (type > ACPI_TYPE_INVALID) {
 255                 return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
 256         }
 257
 258         return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
 259 }
 260
 261 char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 262 {
 263
 264         if (!obj_desc) {
 265                 return ("[NULL Object Descriptor]");
 266         }
 267
 268         return (acpi_ut_get_type_name(obj_desc->common.type));
 269 }
 270
 271 /*******************************************************************************
 272  *
 273  * FUNCTION:    acpi_ut_get_node_name
 274  *
 275  * PARAMETERS:  object               - A namespace node
 276  *
 277  * RETURN:      ASCII name of the node
 278  *
 279  * DESCRIPTION: Validate the node and return the node's ACPI name.
 280  *
 281  ******************************************************************************/
 282
 283 char *acpi_ut_get_node_name(void *object)
 284 {
 285         struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 286
 287         /* Must return a string of exactly 4 characters == ACPI_NAME_SIZE */
 288
 289         if (!object) {
 290                 return ("NULL");
 291         }
 292
 293         /* Check for Root node */
 294
 295         if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
 296                 return ("\"\\\" ");
 297         }
 298
 299         /* Descriptor must be a namespace node */
 300
 301         if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
 302                 return ("####");
 303         }
 304
 305         /*
 306          * Ensure name is valid. The name was validated/repaired when the node
 307          * was created, but make sure it has not been corrupted.
 308          */
 309         acpi_ut_repair_name(node->name.ascii);
 310
 311         /* Return the name */
 312
 313         return (node->name.ascii);
 314 }
 315
 316 /*******************************************************************************
 317  *
 318  * FUNCTION:    acpi_ut_get_descriptor_name
 319  *
 320  * PARAMETERS:  object               - An ACPI object
 321  *
 322  * RETURN:      Decoded name of the descriptor type
 323  *
 324  * DESCRIPTION: Validate object and return the descriptor type
 325  *
 326  ******************************************************************************/
 327
 328 /* Printable names of object descriptor types */
 329
 330 static const char *acpi_gbl_desc_type_names[] = {
 331         /* 00 */ "Not a Descriptor",
 332         /* 01 */ "Cached",
 333         /* 02 */ "State-Generic",
 334         /* 03 */ "State-Update",
 335         /* 04 */ "State-Package",
 336         /* 05 */ "State-Control",
 337         /* 06 */ "State-RootParseScope",
 338         /* 07 */ "State-ParseScope",
 339         /* 08 */ "State-WalkScope",
 340         /* 09 */ "State-Result",
 341         /* 10 */ "State-Notify",
 342         /* 11 */ "State-Thread",
 343         /* 12 */ "Walk",
 344         /* 13 */ "Parser",
 345         /* 14 */ "Operand",
 346         /* 15 */ "Node"
 347 };
 348
 349 char *acpi_ut_get_descriptor_name(void *object)
 350 {
 351
 352         if (!object) {
 353                 return ("NULL OBJECT");
 354         }
 355
 356         if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
 357                 return ("Not a Descriptor");
 358         }
 359
 360         return (ACPI_CAST_PTR(char,
 361                               acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
 362                                                        (object)]));
 363
 364 }
 365
 366 /*******************************************************************************
 367  *
 368  * FUNCTION:    acpi_ut_get_reference_name
 369  *
 370  * PARAMETERS:  object               - An ACPI reference object
 371  *
 372  * RETURN:      Decoded name of the type of reference
 373  *
 374  * DESCRIPTION: Decode a reference object sub-type to a string.
 375  *
 376  ******************************************************************************/
 377
 378 /* Printable names of reference object sub-types */
 379
 380 static const char *acpi_gbl_ref_class_names[] = {
 381         /* 00 */ "Local",
 382         /* 01 */ "Argument",
 383         /* 02 */ "RefOf",
 384         /* 03 */ "Index",
 385         /* 04 */ "DdbHandle",
 386         /* 05 */ "Named Object",
 387         /* 06 */ "Debug"
 388 };
 389
 390 const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
 391 {
 392
 393         if (!object) {
 394                 return ("NULL Object");
 395         }
 396
 397         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
 398                 return ("Not an Operand object");
 399         }
 400
 401         if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
 402                 return ("Not a Reference object");
 403         }
 404
 405         if (object->reference.class > ACPI_REFCLASS_MAX) {
 406                 return ("Unknown Reference class");
 407         }
 408
 409         return (acpi_gbl_ref_class_names[object->reference.class]);
 410 }
 411
 412 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
 413 /*
 414  * Strings and procedures used for debug only
 415  */
 416
 417 /*******************************************************************************
 418  *
 419  * FUNCTION:    acpi_ut_get_mutex_name
 420  *
 421  * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 422  *
 423  * RETURN:      Decoded name of the internal mutex
 424  *
 425  * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 426  *
 427  ******************************************************************************/
 428
 429 /* Names for internal mutex objects, used for debug output */
 430
 431 static char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
 432         "ACPI_MTX_Interpreter",
 433         "ACPI_MTX_Namespace",
 434         "ACPI_MTX_Tables",
 435         "ACPI_MTX_Events",
 436         "ACPI_MTX_Caches",
 437         "ACPI_MTX_Memory",
 438         "ACPI_MTX_CommandComplete",
 439         "ACPI_MTX_CommandReady"
 440 };
 441
 442 char *acpi_ut_get_mutex_name(u32 mutex_id)
 443 {
 444
 445         if (mutex_id > ACPI_MAX_MUTEX) {
 446                 return ("Invalid Mutex ID");
 447         }
 448
 449         return (acpi_gbl_mutex_names[mutex_id]);
 450 }
 451
 452 /*******************************************************************************
 453  *
 454  * FUNCTION:    acpi_ut_get_notify_name
 455  *
 456  * PARAMETERS:  notify_value    - Value from the Notify() request
 457  *
 458  * RETURN:      Decoded name for the notify value
 459  *
 460  * DESCRIPTION: Translate a Notify Value to a notify namestring.
 461  *
 462  ******************************************************************************/
 463
 464 /* Names for Notify() values, used for debug output */
 465
 466 static const char *acpi_gbl_notify_value_names[ACPI_NOTIFY_MAX + 1] = {
 467         /* 00 */ "Bus Check",
 468         /* 01 */ "Device Check",
 469         /* 02 */ "Device Wake",
 470         /* 03 */ "Eject Request",
 471         /* 04 */ "Device Check Light",
 472         /* 05 */ "Frequency Mismatch",
 473         /* 06 */ "Bus Mode Mismatch",
 474         /* 07 */ "Power Fault",
 475         /* 08 */ "Capabilities Check",
 476         /* 09 */ "Device PLD Check",
 477         /* 10 */ "Reserved",
 478         /* 11 */ "System Locality Update",
 479         /* 12 */ "Shutdown Request"
 480 };
 481
 482 const char *acpi_ut_get_notify_name(u32 notify_value)
 483 {
 484
 485         if (notify_value <= ACPI_NOTIFY_MAX) {
 486                 return (acpi_gbl_notify_value_names[notify_value]);
 487         } else if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
 488                 return ("Reserved");
 489         } else if (notify_value <= ACPI_MAX_DEVICE_SPECIFIC_NOTIFY) {
 490                 return ("Device Specific");
 491         } else {
 492                 return ("Hardware Specific");
 493         }
 494 }
 495 #endif
 496
 497 /*******************************************************************************
 498  *
 499  * FUNCTION:    acpi_ut_valid_object_type
 500  *
 501  * PARAMETERS:  type            - Object type to be validated
 502  *
 503  * RETURN:      TRUE if valid object type, FALSE otherwise
 504  *
 505  * DESCRIPTION: Validate an object type
 506  *
 507  ******************************************************************************/
 508
 509 u8 acpi_ut_valid_object_type(acpi_object_type type)
 510 {
 511
 512         if (type > ACPI_TYPE_LOCAL_MAX) {
 513
 514                 /* Note: Assumes all TYPEs are contiguous (external/local) */
 515
 516                 return (FALSE);
 517         }
 518
 519         return (TRUE);
 520 }