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         /* Skip all preceding white space */
 110
 111         acpi_ut_remove_whitespace(&string);
 112
 113         /* Generate the final buffer length */
 114
 115         for (i = 0, length = 0; string[i];) {
 116                 i += 2;
 117                 length++;
 118
 119                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 120                         i++;
 121                 }
 122         }
 123
 124         buffer = ACPI_ALLOCATE(length);
 125         if (!buffer) {
 126                 return (AE_NO_MEMORY);
 127         }
 128
 129         /* Convert the command line bytes to the buffer */
 130
 131         for (i = 0, j = 0; string[i];) {
 132                 status = acpi_db_hex_byte_to_binary(&string[i], &buffer[j]);
 133                 if (ACPI_FAILURE(status)) {
 134                         ACPI_FREE(buffer);
 135                         return (status);
 136                 }
 137
 138                 j++;
 139                 i += 2;
 140                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 141                         i++;
 142                 }
 143         }
 144
 145         object->type = ACPI_TYPE_BUFFER;
 146         object->buffer.pointer = buffer;
 147         object->buffer.length = length;
 148         return (AE_OK);
 149 }
 150
 151 /*******************************************************************************
 152  *
 153  * FUNCTION:    acpi_db_convert_to_package
 154  *
 155  * PARAMETERS:  string              - Input string to be converted
 156  *              object              - Where the package object is returned
 157  *
 158  * RETURN:      Status
 159  *
 160  * DESCRIPTION: Convert a string to a package object. Handles nested packages
 161  *              via recursion with acpi_db_convert_to_object.
 162  *
 163  ******************************************************************************/
 164
 165 acpi_status acpi_db_convert_to_package(char *string, union acpi_object *object)
 166 {
 167         char *this;
 168         char *next;
 169         u32 i;
 170         acpi_object_type type;
 171         union acpi_object *elements;
 172         acpi_status status;
 173
 174         elements =
 175             ACPI_ALLOCATE_ZEROED(DB_DEFAULT_PKG_ELEMENTS *
 176                                  sizeof(union acpi_object));
 177
 178         this = string;
 179         for (i = 0; i < (DB_DEFAULT_PKG_ELEMENTS - 1); i++) {
 180                 this = acpi_db_get_next_token(this, &next, &type);
 181                 if (!this) {
 182                         break;
 183                 }
 184
 185                 /* Recursive call to convert each package element */
 186
 187                 status = acpi_db_convert_to_object(type, this, &elements[i]);
 188                 if (ACPI_FAILURE(status)) {
 189                         acpi_db_delete_objects(i + 1, elements);
 190                         ACPI_FREE(elements);
 191                         return (status);
 192                 }
 193
 194                 this = next;
 195         }
 196
 197         object->type = ACPI_TYPE_PACKAGE;
 198         object->package.count = i;
 199         object->package.elements = elements;
 200         return (AE_OK);
 201 }
 202
 203 /*******************************************************************************
 204  *
 205  * FUNCTION:    acpi_db_convert_to_object
 206  *
 207  * PARAMETERS:  type                - Object type as determined by parser
 208  *              string              - Input string to be converted
 209  *              object              - Where the new object is returned
 210  *
 211  * RETURN:      Status
 212  *
 213  * DESCRIPTION: Convert a typed and tokenized string to a union acpi_object. Typing:
 214  *              1) String objects were surrounded by quotes.
 215  *              2) Buffer objects were surrounded by parentheses.
 216  *              3) Package objects were surrounded by brackets "[]".
 217  *              4) All standalone tokens are treated as integers.
 218  *
 219  ******************************************************************************/
 220
 221 acpi_status
 222 acpi_db_convert_to_object(acpi_object_type type,
 223                           char *string, union acpi_object *object)
 224 {
 225         acpi_status status = AE_OK;
 226
 227         switch (type) {
 228         case ACPI_TYPE_STRING:
 229
 230                 object->type = ACPI_TYPE_STRING;
 231                 object->string.pointer = string;
 232                 object->string.length = (u32)strlen(string);
 233                 break;
 234
 235         case ACPI_TYPE_BUFFER:
 236
 237                 status = acpi_db_convert_to_buffer(string, object);
 238                 break;
 239
 240         case ACPI_TYPE_PACKAGE:
 241
 242                 status = acpi_db_convert_to_package(string, object);
 243                 break;
 244
 245         default:
 246
 247                 object->type = ACPI_TYPE_INTEGER;
 248                 status = acpi_ut_strtoul64(string, &object->integer.value);
 249                 break;
 250         }
 251
 252         return (status);
 253 }
 254
 255 /*******************************************************************************
 256  *
 257  * FUNCTION:    acpi_db_encode_pld_buffer
 258  *
 259  * PARAMETERS:  pld_info            - _PLD buffer struct (Using local struct)
 260  *
 261  * RETURN:      Encode _PLD buffer suitable for return value from _PLD
 262  *
 263  * DESCRIPTION: Bit-packs a _PLD buffer struct. Used to test the _PLD macros
 264  *
 265  ******************************************************************************/
 266
 267 u8 *acpi_db_encode_pld_buffer(struct acpi_pld_info *pld_info)
 268 {
 269         u32 *buffer;
 270         u32 dword;
 271
 272         buffer = ACPI_ALLOCATE_ZEROED(ACPI_PLD_BUFFER_SIZE);
 273         if (!buffer) {
 274                 return (NULL);
 275         }
 276
 277         /* First 32 bits */
 278
 279         dword = 0;
 280         ACPI_PLD_SET_REVISION(&dword, pld_info->revision);
 281         ACPI_PLD_SET_IGNORE_COLOR(&dword, pld_info->ignore_color);
 282         ACPI_PLD_SET_RED(&dword, pld_info->red);
 283         ACPI_PLD_SET_GREEN(&dword, pld_info->green);
 284         ACPI_PLD_SET_BLUE(&dword, pld_info->blue);
 285         ACPI_MOVE_32_TO_32(&buffer[0], &dword);
 286
 287         /* Second 32 bits */
 288
 289         dword = 0;
 290         ACPI_PLD_SET_WIDTH(&dword, pld_info->width);
 291         ACPI_PLD_SET_HEIGHT(&dword, pld_info->height);
 292         ACPI_MOVE_32_TO_32(&buffer[1], &dword);
 293
 294         /* Third 32 bits */
 295
 296         dword = 0;
 297         ACPI_PLD_SET_USER_VISIBLE(&dword, pld_info->user_visible);
 298         ACPI_PLD_SET_DOCK(&dword, pld_info->dock);
 299         ACPI_PLD_SET_LID(&dword, pld_info->lid);
 300         ACPI_PLD_SET_PANEL(&dword, pld_info->panel);
 301         ACPI_PLD_SET_VERTICAL(&dword, pld_info->vertical_position);
 302         ACPI_PLD_SET_HORIZONTAL(&dword, pld_info->horizontal_position);
 303         ACPI_PLD_SET_SHAPE(&dword, pld_info->shape);
 304         ACPI_PLD_SET_ORIENTATION(&dword, pld_info->group_orientation);
 305         ACPI_PLD_SET_TOKEN(&dword, pld_info->group_token);
 306         ACPI_PLD_SET_POSITION(&dword, pld_info->group_position);
 307         ACPI_PLD_SET_BAY(&dword, pld_info->bay);
 308         ACPI_MOVE_32_TO_32(&buffer[2], &dword);
 309
 310         /* Fourth 32 bits */
 311
 312         dword = 0;
 313         ACPI_PLD_SET_EJECTABLE(&dword, pld_info->ejectable);
 314         ACPI_PLD_SET_OSPM_EJECT(&dword, pld_info->ospm_eject_required);
 315         ACPI_PLD_SET_CABINET(&dword, pld_info->cabinet_number);
 316         ACPI_PLD_SET_CARD_CAGE(&dword, pld_info->card_cage_number);
 317         ACPI_PLD_SET_REFERENCE(&dword, pld_info->reference);
 318         ACPI_PLD_SET_ROTATION(&dword, pld_info->rotation);
 319         ACPI_PLD_SET_ORDER(&dword, pld_info->order);
 320         ACPI_MOVE_32_TO_32(&buffer[3], &dword);
 321
 322         if (pld_info->revision >= 2) {
 323
 324                 /* Fifth 32 bits */
 325
 326                 dword = 0;
 327                 ACPI_PLD_SET_VERT_OFFSET(&dword, pld_info->vertical_offset);
 328                 ACPI_PLD_SET_HORIZ_OFFSET(&dword, pld_info->horizontal_offset);
 329                 ACPI_MOVE_32_TO_32(&buffer[4], &dword);
 330         }
 331
 332         return (ACPI_CAST_PTR(u8, buffer));
 333 }
 334
 335 /*******************************************************************************
 336  *
 337  * FUNCTION:    acpi_db_dump_pld_buffer
 338  *
 339  * PARAMETERS:  obj_desc            - Object returned from _PLD method
 340  *
 341  * RETURN:      None.
 342  *
 343  * DESCRIPTION: Dumps formatted contents of a _PLD return buffer.
 344  *
 345  ******************************************************************************/
 346
 347 #define ACPI_PLD_OUTPUT     "%20s : %-6X\n"
 348
 349 void acpi_db_dump_pld_buffer(union acpi_object *obj_desc)
 350 {
 351         union acpi_object *buffer_desc;
 352         struct acpi_pld_info *pld_info;
 353         u8 *new_buffer;
 354         acpi_status status;
 355
 356         /* Object must be of type Package with at least one Buffer element */
 357
 358         if (obj_desc->type != ACPI_TYPE_PACKAGE) {
 359                 return;
 360         }
 361
 362         buffer_desc = &obj_desc->package.elements[0];
 363         if (buffer_desc->type != ACPI_TYPE_BUFFER) {
 364                 return;
 365         }
 366
 367         /* Convert _PLD buffer to local _PLD struct */
 368
 369         status = acpi_decode_pld_buffer(buffer_desc->buffer.pointer,
 370                                         buffer_desc->buffer.length, &pld_info);
 371         if (ACPI_FAILURE(status)) {
 372                 return;
 373         }
 374
 375         /* Encode local _PLD struct back to a _PLD buffer */
 376
 377         new_buffer = acpi_db_encode_pld_buffer(pld_info);
 378         if (!new_buffer) {
 379                 goto exit;
 380         }
 381
 382         /* The two bit-packed buffers should match */
 383
 384         if (memcmp(new_buffer, buffer_desc->buffer.pointer,
 385                    buffer_desc->buffer.length)) {
 386                 acpi_os_printf
 387                     ("Converted _PLD buffer does not compare. New:\n");
 388
 389                 acpi_ut_dump_buffer(new_buffer,
 390                                     buffer_desc->buffer.length, DB_BYTE_DISPLAY,
 391                                     0);
 392         }
 393
 394         /* First 32-bit dword */
 395
 396         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Revision", pld_info->revision);
 397         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_IgnoreColor",
 398                        pld_info->ignore_color);
 399         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Red", pld_info->red);
 400         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Green", pld_info->green);
 401         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Blue", pld_info->blue);
 402
 403         /* Second 32-bit dword */
 404
 405         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Width", pld_info->width);
 406         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Height", pld_info->height);
 407
 408         /* Third 32-bit dword */
 409
 410         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_UserVisible",
 411                        pld_info->user_visible);
 412         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Dock", pld_info->dock);
 413         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Lid", pld_info->lid);
 414         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Panel", pld_info->panel);
 415         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalPosition",
 416                        pld_info->vertical_position);
 417         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalPosition",
 418                        pld_info->horizontal_position);
 419         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Shape", pld_info->shape);
 420         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupOrientation",
 421                        pld_info->group_orientation);
 422         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupToken",
 423                        pld_info->group_token);
 424         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupPosition",
 425                        pld_info->group_position);
 426         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Bay", pld_info->bay);
 427
 428         /* Fourth 32-bit dword */
 429
 430         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Ejectable", pld_info->ejectable);
 431         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_EjectRequired",
 432                        pld_info->ospm_eject_required);
 433         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CabinetNumber",
 434                        pld_info->cabinet_number);
 435         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CardCageNumber",
 436                        pld_info->card_cage_number);
 437         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Reference", pld_info->reference);
 438         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Rotation", pld_info->rotation);
 439         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Order", pld_info->order);
 440
 441         /* Fifth 32-bit dword */
 442
 443         if (buffer_desc->buffer.length > 16) {
 444                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalOffset",
 445                                pld_info->vertical_offset);
 446                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalOffset",
 447                                pld_info->horizontal_offset);
 448         }
 449
 450         ACPI_FREE(new_buffer);
 451 exit:
 452         ACPI_FREE(pld_info);
 453 }