drivers/acpi/acpica/dbconvert.c

   1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
   2 /*******************************************************************************
   3  *
   4  * Module Name: dbconvert - debugger miscellaneous conversion routines
   5  *
   6  ******************************************************************************/
   7
   8 #include <acpi/acpi.h>
   9 #include "accommon.h"
  10 #include "acdebug.h"
  11
  12 #define _COMPONENT          ACPI_CA_DEBUGGER
  13 ACPI_MODULE_NAME("dbconvert")
  14
  15 #define DB_DEFAULT_PKG_ELEMENTS     33
  16 /*******************************************************************************
  17  *
  18  * FUNCTION:    acpi_db_hex_char_to_value
  19  *
  20  * PARAMETERS:  hex_char            - Ascii Hex digit, 0-9|a-f|A-F
  21  *              return_value        - Where the converted value is returned
  22  *
  23  * RETURN:      Status
  24  *
  25  * DESCRIPTION: Convert a single hex character to a 4-bit number (0-16).
  26  *
  27  ******************************************************************************/
  28 acpi_status acpi_db_hex_char_to_value(int hex_char, u8 *return_value)
  29 {
  30         u8 value;
  31
  32         /* Digit must be ascii [0-9a-fA-F] */
  33
  34         if (!isxdigit(hex_char)) {
  35                 return (AE_BAD_HEX_CONSTANT);
  36         }
  37
  38         if (hex_char <= 0x39) {
  39                 value = (u8)(hex_char - 0x30);
  40         } else {
  41                 value = (u8)(toupper(hex_char) - 0x37);
  42         }
  43
  44         *return_value = value;
  45         return (AE_OK);
  46 }
  47
  48 /*******************************************************************************
  49  *
  50  * FUNCTION:    acpi_db_hex_byte_to_binary
  51  *
  52  * PARAMETERS:  hex_byte            - Double hex digit (0x00 - 0xFF) in format:
  53  *                                    hi_byte then lo_byte.
  54  *              return_value        - Where the converted value is returned
  55  *
  56  * RETURN:      Status
  57  *
  58  * DESCRIPTION: Convert two hex characters to an 8 bit number (0 - 255).
  59  *
  60  ******************************************************************************/
  61
  62 static acpi_status acpi_db_hex_byte_to_binary(char *hex_byte, u8 *return_value)
  63 {
  64         u8 local0;
  65         u8 local1;
  66         acpi_status status;
  67
  68         /* High byte */
  69
  70         status = acpi_db_hex_char_to_value(hex_byte[0], &local0);
  71         if (ACPI_FAILURE(status)) {
  72                 return (status);
  73         }
  74
  75         /* Low byte */
  76
  77         status = acpi_db_hex_char_to_value(hex_byte[1], &local1);
  78         if (ACPI_FAILURE(status)) {
  79                 return (status);
  80         }
  81
  82         *return_value = (u8)((local0 << 4) | local1);
  83         return (AE_OK);
  84 }
  85
  86 /*******************************************************************************
  87  *
  88  * FUNCTION:    acpi_db_convert_to_buffer
  89  *
  90  * PARAMETERS:  string              - Input string to be converted
  91  *              object              - Where the buffer object is returned
  92  *
  93  * RETURN:      Status
  94  *
  95  * DESCRIPTION: Convert a string to a buffer object. String is treated a list
  96  *              of buffer elements, each separated by a space or comma.
  97  *
  98  ******************************************************************************/
  99
 100 static acpi_status
 101 acpi_db_convert_to_buffer(char *string, union acpi_object *object)
 102 {
 103         u32 i;
 104         u32 j;
 105         u32 length;
 106         u8 *buffer;
 107         acpi_status status;
 108
 109         /* Generate the final buffer length */
 110
 111         for (i = 0, length = 0; string[i];) {
 112                 i += 2;
 113                 length++;
 114
 115                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 116                         i++;
 117                 }
 118         }
 119
 120         buffer = ACPI_ALLOCATE(length);
 121         if (!buffer) {
 122                 return (AE_NO_MEMORY);
 123         }
 124
 125         /* Convert the command line bytes to the buffer */
 126
 127         for (i = 0, j = 0; string[i];) {
 128                 status = acpi_db_hex_byte_to_binary(&string[i], &buffer[j]);
 129                 if (ACPI_FAILURE(status)) {
 130                         ACPI_FREE(buffer);
 131                         return (status);
 132                 }
 133
 134                 j++;
 135                 i += 2;
 136                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 137                         i++;
 138                 }
 139         }
 140
 141         object->type = ACPI_TYPE_BUFFER;
 142         object->buffer.pointer = buffer;
 143         object->buffer.length = length;
 144         return (AE_OK);
 145 }
 146
 147 /*******************************************************************************
 148  *
 149  * FUNCTION:    acpi_db_convert_to_package
 150  *
 151  * PARAMETERS:  string              - Input string to be converted
 152  *              object              - Where the package object is returned
 153  *
 154  * RETURN:      Status
 155  *
 156  * DESCRIPTION: Convert a string to a package object. Handles nested packages
 157  *              via recursion with acpi_db_convert_to_object.
 158  *
 159  ******************************************************************************/
 160
 161 acpi_status acpi_db_convert_to_package(char *string, union acpi_object *object)
 162 {
 163         char *this;
 164         char *next;
 165         u32 i;
 166         acpi_object_type type;
 167         union acpi_object *elements;
 168         acpi_status status;
 169
 170         elements =
 171             ACPI_ALLOCATE_ZEROED(DB_DEFAULT_PKG_ELEMENTS *
 172                                  sizeof(union acpi_object));
 173
 174         this = string;
 175         for (i = 0; i < (DB_DEFAULT_PKG_ELEMENTS - 1); i++) {
 176                 this = acpi_db_get_next_token(this, &next, &type);
 177                 if (!this) {
 178                         break;
 179                 }
 180
 181                 /* Recursive call to convert each package element */
 182
 183                 status = acpi_db_convert_to_object(type, this, &elements[i]);
 184                 if (ACPI_FAILURE(status)) {
 185                         acpi_db_delete_objects(i + 1, elements);
 186                         ACPI_FREE(elements);
 187                         return (status);
 188                 }
 189
 190                 this = next;
 191         }
 192
 193         object->type = ACPI_TYPE_PACKAGE;
 194         object->package.count = i;
 195         object->package.elements = elements;
 196         return (AE_OK);
 197 }
 198
 199 /*******************************************************************************
 200  *
 201  * FUNCTION:    acpi_db_convert_to_object
 202  *
 203  * PARAMETERS:  type                - Object type as determined by parser
 204  *              string              - Input string to be converted
 205  *              object              - Where the new object is returned
 206  *
 207  * RETURN:      Status
 208  *
 209  * DESCRIPTION: Convert a typed and tokenized string to a union acpi_object. Typing:
 210  *              1) String objects were surrounded by quotes.
 211  *              2) Buffer objects were surrounded by parentheses.
 212  *              3) Package objects were surrounded by brackets "[]".
 213  *              4) All standalone tokens are treated as integers.
 214  *
 215  ******************************************************************************/
 216
 217 acpi_status
 218 acpi_db_convert_to_object(acpi_object_type type,
 219                           char *string, union acpi_object *object)
 220 {
 221         acpi_status status = AE_OK;
 222
 223         switch (type) {
 224         case ACPI_TYPE_STRING:
 225
 226                 object->type = ACPI_TYPE_STRING;
 227                 object->string.pointer = string;
 228                 object->string.length = (u32)strlen(string);
 229                 break;
 230
 231         case ACPI_TYPE_BUFFER:
 232
 233                 status = acpi_db_convert_to_buffer(string, object);
 234                 break;
 235
 236         case ACPI_TYPE_PACKAGE:
 237
 238                 status = acpi_db_convert_to_package(string, object);
 239                 break;
 240
 241         default:
 242
 243                 object->type = ACPI_TYPE_INTEGER;
 244                 status = acpi_ut_strtoul64(string, &object->integer.value);
 245                 break;
 246         }
 247
 248         return (status);
 249 }
 250
 251 /*******************************************************************************
 252  *
 253  * FUNCTION:    acpi_db_encode_pld_buffer
 254  *
 255  * PARAMETERS:  pld_info            - _PLD buffer struct (Using local struct)
 256  *
 257  * RETURN:      Encode _PLD buffer suitable for return value from _PLD
 258  *
 259  * DESCRIPTION: Bit-packs a _PLD buffer struct. Used to test the _PLD macros
 260  *
 261  ******************************************************************************/
 262
 263 u8 *acpi_db_encode_pld_buffer(struct acpi_pld_info *pld_info)
 264 {
 265         u32 *buffer;
 266         u32 dword;
 267
 268         buffer = ACPI_ALLOCATE_ZEROED(ACPI_PLD_BUFFER_SIZE);
 269         if (!buffer) {
 270                 return (NULL);
 271         }
 272
 273         /* First 32 bits */
 274
 275         dword = 0;
 276         ACPI_PLD_SET_REVISION(&dword, pld_info->revision);
 277         ACPI_PLD_SET_IGNORE_COLOR(&dword, pld_info->ignore_color);
 278         ACPI_PLD_SET_RED(&dword, pld_info->red);
 279         ACPI_PLD_SET_GREEN(&dword, pld_info->green);
 280         ACPI_PLD_SET_BLUE(&dword, pld_info->blue);
 281         ACPI_MOVE_32_TO_32(&buffer[0], &dword);
 282
 283         /* Second 32 bits */
 284
 285         dword = 0;
 286         ACPI_PLD_SET_WIDTH(&dword, pld_info->width);
 287         ACPI_PLD_SET_HEIGHT(&dword, pld_info->height);
 288         ACPI_MOVE_32_TO_32(&buffer[1], &dword);
 289
 290         /* Third 32 bits */
 291
 292         dword = 0;
 293         ACPI_PLD_SET_USER_VISIBLE(&dword, pld_info->user_visible);
 294         ACPI_PLD_SET_DOCK(&dword, pld_info->dock);
 295         ACPI_PLD_SET_LID(&dword, pld_info->lid);
 296         ACPI_PLD_SET_PANEL(&dword, pld_info->panel);
 297         ACPI_PLD_SET_VERTICAL(&dword, pld_info->vertical_position);
 298         ACPI_PLD_SET_HORIZONTAL(&dword, pld_info->horizontal_position);
 299         ACPI_PLD_SET_SHAPE(&dword, pld_info->shape);
 300         ACPI_PLD_SET_ORIENTATION(&dword, pld_info->group_orientation);
 301         ACPI_PLD_SET_TOKEN(&dword, pld_info->group_token);
 302         ACPI_PLD_SET_POSITION(&dword, pld_info->group_position);
 303         ACPI_PLD_SET_BAY(&dword, pld_info->bay);
 304         ACPI_MOVE_32_TO_32(&buffer[2], &dword);
 305
 306         /* Fourth 32 bits */
 307
 308         dword = 0;
 309         ACPI_PLD_SET_EJECTABLE(&dword, pld_info->ejectable);
 310         ACPI_PLD_SET_OSPM_EJECT(&dword, pld_info->ospm_eject_required);
 311         ACPI_PLD_SET_CABINET(&dword, pld_info->cabinet_number);
 312         ACPI_PLD_SET_CARD_CAGE(&dword, pld_info->card_cage_number);
 313         ACPI_PLD_SET_REFERENCE(&dword, pld_info->reference);
 314         ACPI_PLD_SET_ROTATION(&dword, pld_info->rotation);
 315         ACPI_PLD_SET_ORDER(&dword, pld_info->order);
 316         ACPI_MOVE_32_TO_32(&buffer[3], &dword);
 317
 318         if (pld_info->revision >= 2) {
 319
 320                 /* Fifth 32 bits */
 321
 322                 dword = 0;
 323                 ACPI_PLD_SET_VERT_OFFSET(&dword, pld_info->vertical_offset);
 324                 ACPI_PLD_SET_HORIZ_OFFSET(&dword, pld_info->horizontal_offset);
 325                 ACPI_MOVE_32_TO_32(&buffer[4], &dword);
 326         }
 327
 328         return (ACPI_CAST_PTR(u8, buffer));
 329 }
 330
 331 /*******************************************************************************
 332  *
 333  * FUNCTION:    acpi_db_dump_pld_buffer
 334  *
 335  * PARAMETERS:  obj_desc            - Object returned from _PLD method
 336  *
 337  * RETURN:      None.
 338  *
 339  * DESCRIPTION: Dumps formatted contents of a _PLD return buffer.
 340  *
 341  ******************************************************************************/
 342
 343 #define ACPI_PLD_OUTPUT     "%20s : %-6X\n"
 344
 345 void acpi_db_dump_pld_buffer(union acpi_object *obj_desc)
 346 {
 347         union acpi_object *buffer_desc;
 348         struct acpi_pld_info *pld_info;
 349         u8 *new_buffer;
 350         acpi_status status;
 351
 352         /* Object must be of type Package with at least one Buffer element */
 353
 354         if (obj_desc->type != ACPI_TYPE_PACKAGE) {
 355                 return;
 356         }
 357
 358         buffer_desc = &obj_desc->package.elements[0];
 359         if (buffer_desc->type != ACPI_TYPE_BUFFER) {
 360                 return;
 361         }
 362
 363         /* Convert _PLD buffer to local _PLD struct */
 364
 365         status = acpi_decode_pld_buffer(buffer_desc->buffer.pointer,
 366                                         buffer_desc->buffer.length, &pld_info);
 367         if (ACPI_FAILURE(status)) {
 368                 return;
 369         }
 370
 371         /* Encode local _PLD struct back to a _PLD buffer */
 372
 373         new_buffer = acpi_db_encode_pld_buffer(pld_info);
 374         if (!new_buffer) {
 375                 goto exit;
 376         }
 377
 378         /* The two bit-packed buffers should match */
 379
 380         if (memcmp(new_buffer, buffer_desc->buffer.pointer,
 381                    buffer_desc->buffer.length)) {
 382                 acpi_os_printf
 383                     ("Converted _PLD buffer does not compare. New:\n");
 384
 385                 acpi_ut_dump_buffer(new_buffer,
 386                                     buffer_desc->buffer.length, DB_BYTE_DISPLAY,
 387                                     0);
 388         }
 389
 390         /* First 32-bit dword */
 391
 392         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Revision", pld_info->revision);
 393         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_IgnoreColor",
 394                        pld_info->ignore_color);
 395         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Red", pld_info->red);
 396         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Green", pld_info->green);
 397         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Blue", pld_info->blue);
 398
 399         /* Second 32-bit dword */
 400
 401         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Width", pld_info->width);
 402         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Height", pld_info->height);
 403
 404         /* Third 32-bit dword */
 405
 406         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_UserVisible",
 407                        pld_info->user_visible);
 408         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Dock", pld_info->dock);
 409         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Lid", pld_info->lid);
 410         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Panel", pld_info->panel);
 411         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalPosition",
 412                        pld_info->vertical_position);
 413         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalPosition",
 414                        pld_info->horizontal_position);
 415         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Shape", pld_info->shape);
 416         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupOrientation",
 417                        pld_info->group_orientation);
 418         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupToken",
 419                        pld_info->group_token);
 420         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupPosition",
 421                        pld_info->group_position);
 422         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Bay", pld_info->bay);
 423
 424         /* Fourth 32-bit dword */
 425
 426         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Ejectable", pld_info->ejectable);
 427         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_EjectRequired",
 428                        pld_info->ospm_eject_required);
 429         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CabinetNumber",
 430                        pld_info->cabinet_number);
 431         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CardCageNumber",
 432                        pld_info->card_cage_number);
 433         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Reference", pld_info->reference);
 434         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Rotation", pld_info->rotation);
 435         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Order", pld_info->order);
 436
 437         /* Fifth 32-bit dword */
 438
 439         if (buffer_desc->buffer.length > 16) {
 440                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalOffset",
 441                                pld_info->vertical_offset);
 442                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalOffset",
 443                                pld_info->horizontal_offset);
 444         }
 445
 446         ACPI_FREE(new_buffer);
 447 exit:
 448         ACPI_FREE(pld_info);
 449 }