git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/resources/rslist.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rslist - Linked list utilities
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, R. Byron Moore
   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 <acpi/acresrc.h>
  46
  47 #define _COMPONENT          ACPI_RESOURCES
  48 ACPI_MODULE_NAME("rslist")
  49
  50 /*******************************************************************************
  51  *
  52  * FUNCTION:    acpi_rs_get_resource_type
  53  *
  54  * PARAMETERS:  resource_start_byte     - Byte 0 of a resource descriptor
  55  *
  56  * RETURN:      The Resource Type with no extraneous bits
  57  *
  58  * DESCRIPTION: Extract the Resource Type/Name from the first byte of
  59  *              a resource descriptor.
  60  *
  61  ******************************************************************************/
  62 u8 acpi_rs_get_resource_type(u8 resource_start_byte)
  63 {
  64
  65         ACPI_FUNCTION_ENTRY();
  66
  67         /* Determine if this is a small or large resource */
  68
  69         switch (resource_start_byte & ACPI_RDESC_TYPE_MASK) {
  70         case ACPI_RDESC_TYPE_SMALL:
  71
  72                 /* Small Resource Type -- Only bits 6:3 are valid */
  73
  74                 return ((u8) (resource_start_byte & ACPI_RDESC_SMALL_MASK));
  75
  76         case ACPI_RDESC_TYPE_LARGE:
  77
  78                 /* Large Resource Type -- All bits are valid */
  79
  80                 return (resource_start_byte);
  81
  82         default:
  83                 /* Invalid type */
  84                 break;
  85         }
  86
  87         return (0xFF);
  88 }
  89
  90 /*******************************************************************************
  91  *
  92  * FUNCTION:    acpi_rs_byte_stream_to_list
  93  *
  94  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource byte stream
  95  *              byte_stream_buffer_length - Length of byte_stream_buffer
  96  *              output_buffer           - Pointer to the buffer that will
  97  *                                        contain the output structures
  98  *
  99  * RETURN:      Status
 100  *
 101  * DESCRIPTION: Takes the resource byte stream and parses it, creating a
 102  *              linked list of resources in the caller's output buffer
 103  *
 104  ******************************************************************************/
 105
 106 acpi_status
 107 acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
 108                             u32 byte_stream_buffer_length, u8 * output_buffer)
 109 {
 110         acpi_status status;
 111         acpi_size bytes_parsed = 0;
 112         u8 resource_type = 0;
 113         acpi_size bytes_consumed = 0;
 114         u8 *buffer = output_buffer;
 115         acpi_size structure_size = 0;
 116         u8 end_tag_processed = FALSE;
 117         struct acpi_resource *resource;
 118
 119         ACPI_FUNCTION_TRACE("rs_byte_stream_to_list");
 120
 121         while (bytes_parsed < byte_stream_buffer_length && !end_tag_processed) {
 122                 /* The next byte in the stream is the resource type */
 123
 124                 resource_type = acpi_rs_get_resource_type(*byte_stream_buffer);
 125
 126                 switch (resource_type) {
 127                 case ACPI_RDESC_TYPE_MEMORY_24:
 128                         /*
 129                          * 24-Bit Memory Resource
 130                          */
 131                         status = acpi_rs_memory24_resource(byte_stream_buffer,
 132                                                            &bytes_consumed,
 133                                                            &buffer,
 134                                                            &structure_size);
 135                         break;
 136
 137                 case ACPI_RDESC_TYPE_LARGE_VENDOR:
 138                         /*
 139                          * Vendor Defined Resource
 140                          */
 141                         status = acpi_rs_vendor_resource(byte_stream_buffer,
 142                                                          &bytes_consumed,
 143                                                          &buffer,
 144                                                          &structure_size);
 145                         break;
 146
 147                 case ACPI_RDESC_TYPE_MEMORY_32:
 148                         /*
 149                          * 32-Bit Memory Range Resource
 150                          */
 151                         status =
 152                             acpi_rs_memory32_range_resource(byte_stream_buffer,
 153                                                             &bytes_consumed,
 154                                                             &buffer,
 155                                                             &structure_size);
 156                         break;
 157
 158                 case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
 159                         /*
 160                          * 32-Bit Fixed Memory Resource
 161                          */
 162                         status =
 163                             acpi_rs_fixed_memory32_resource(byte_stream_buffer,
 164                                                             &bytes_consumed,
 165                                                             &buffer,
 166                                                             &structure_size);
 167                         break;
 168
 169                 case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
 170                 case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
 171                         /*
 172                          * 64-Bit Address Resource
 173                          */
 174                         status = acpi_rs_address64_resource(byte_stream_buffer,
 175                                                             &bytes_consumed,
 176                                                             &buffer,
 177                                                             &structure_size);
 178                         break;
 179
 180                 case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
 181                         /*
 182                          * 32-Bit Address Resource
 183                          */
 184                         status = acpi_rs_address32_resource(byte_stream_buffer,
 185                                                             &bytes_consumed,
 186                                                             &buffer,
 187                                                             &structure_size);
 188                         break;
 189
 190                 case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
 191                         /*
 192                          * 16-Bit Address Resource
 193                          */
 194                         status = acpi_rs_address16_resource(byte_stream_buffer,
 195                                                             &bytes_consumed,
 196                                                             &buffer,
 197                                                             &structure_size);
 198                         break;
 199
 200                 case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
 201                         /*
 202                          * Extended IRQ
 203                          */
 204                         status =
 205                             acpi_rs_extended_irq_resource(byte_stream_buffer,
 206                                                           &bytes_consumed,
 207                                                           &buffer,
 208                                                           &structure_size);
 209                         break;
 210
 211                 case ACPI_RDESC_TYPE_IRQ_FORMAT:
 212                         /*
 213                          * IRQ Resource
 214                          */
 215                         status = acpi_rs_irq_resource(byte_stream_buffer,
 216                                                       &bytes_consumed, &buffer,
 217                                                       &structure_size);
 218                         break;
 219
 220                 case ACPI_RDESC_TYPE_DMA_FORMAT:
 221                         /*
 222                          * DMA Resource
 223                          */
 224                         status = acpi_rs_dma_resource(byte_stream_buffer,
 225                                                       &bytes_consumed, &buffer,
 226                                                       &structure_size);
 227                         break;
 228
 229                 case ACPI_RDESC_TYPE_START_DEPENDENT:
 230                         /*
 231                          * Start Dependent Functions Resource
 232                          */
 233                         status =
 234                             acpi_rs_start_depend_fns_resource
 235                             (byte_stream_buffer, &bytes_consumed, &buffer,
 236                              &structure_size);
 237                         break;
 238
 239                 case ACPI_RDESC_TYPE_END_DEPENDENT:
 240                         /*
 241                          * End Dependent Functions Resource
 242                          */
 243                         status =
 244                             acpi_rs_end_depend_fns_resource(byte_stream_buffer,
 245                                                             &bytes_consumed,
 246                                                             &buffer,
 247                                                             &structure_size);
 248                         break;
 249
 250                 case ACPI_RDESC_TYPE_IO_PORT:
 251                         /*
 252                          * IO Port Resource
 253                          */
 254                         status = acpi_rs_io_resource(byte_stream_buffer,
 255                                                      &bytes_consumed, &buffer,
 256                                                      &structure_size);
 257                         break;
 258
 259                 case ACPI_RDESC_TYPE_FIXED_IO_PORT:
 260                         /*
 261                          * Fixed IO Port Resource
 262                          */
 263                         status = acpi_rs_fixed_io_resource(byte_stream_buffer,
 264                                                            &bytes_consumed,
 265                                                            &buffer,
 266                                                            &structure_size);
 267                         break;
 268
 269                 case ACPI_RDESC_TYPE_SMALL_VENDOR:
 270                         /*
 271                          * Vendor Specific Resource
 272                          */
 273                         status = acpi_rs_vendor_resource(byte_stream_buffer,
 274                                                          &bytes_consumed,
 275                                                          &buffer,
 276                                                          &structure_size);
 277                         break;
 278
 279                 case ACPI_RDESC_TYPE_END_TAG:
 280                         /*
 281                          * End Tag
 282                          */
 283                         end_tag_processed = TRUE;
 284                         status = acpi_rs_end_tag_resource(byte_stream_buffer,
 285                                                           &bytes_consumed,
 286                                                           &buffer,
 287                                                           &structure_size);
 288                         break;
 289
 290                 default:
 291                         /*
 292                          * Invalid/Unknown resource type
 293                          */
 294                         status = AE_AML_INVALID_RESOURCE_TYPE;
 295                         break;
 296                 }
 297
 298                 if (ACPI_FAILURE(status)) {
 299                         return_ACPI_STATUS(status);
 300                 }
 301
 302                 /* Update the return value and counter */
 303
 304                 bytes_parsed += bytes_consumed;
 305
 306                 /* Set the byte stream to point to the next resource */
 307
 308                 byte_stream_buffer += bytes_consumed;
 309
 310                 /* Set the Buffer to the next structure */
 311
 312                 resource = ACPI_CAST_PTR(struct acpi_resource, buffer);
 313                 resource->length =
 314                     (u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length);
 315                 buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size);
 316         }
 317
 318         /* Check the reason for exiting the while loop */
 319
 320         if (!end_tag_processed) {
 321                 return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
 322         }
 323
 324         return_ACPI_STATUS(AE_OK);
 325 }
 326
 327 /*******************************************************************************
 328  *
 329  * FUNCTION:    acpi_rs_list_to_byte_stream
 330  *
 331  * PARAMETERS:  linked_list             - Pointer to the resource linked list
 332  *              byte_steam_size_needed  - Calculated size of the byte stream
 333  *                                        needed from calling
 334  *                                        acpi_rs_get_byte_stream_length()
 335  *                                        The size of the output_buffer is
 336  *                                        guaranteed to be >=
 337  *                                        byte_stream_size_needed
 338  *              output_buffer           - Pointer to the buffer that will
 339  *                                        contain the byte stream
 340  *
 341  * RETURN:      Status
 342  *
 343  * DESCRIPTION: Takes the resource linked list and parses it, creating a
 344  *              byte stream of resources in the caller's output buffer
 345  *
 346  ******************************************************************************/
 347
 348 acpi_status
 349 acpi_rs_list_to_byte_stream(struct acpi_resource *linked_list,
 350                             acpi_size byte_stream_size_needed,
 351                             u8 * output_buffer)
 352 {
 353         acpi_status status;
 354         u8 *buffer = output_buffer;
 355         acpi_size bytes_consumed = 0;
 356         u8 done = FALSE;
 357
 358         ACPI_FUNCTION_TRACE("rs_list_to_byte_stream");
 359
 360         while (!done) {
 361                 switch (linked_list->id) {
 362                 case ACPI_RSTYPE_IRQ:
 363                         /*
 364                          * IRQ Resource
 365                          */
 366                         status =
 367                             acpi_rs_irq_stream(linked_list, &buffer,
 368                                                &bytes_consumed);
 369                         break;
 370
 371                 case ACPI_RSTYPE_DMA:
 372                         /*
 373                          * DMA Resource
 374                          */
 375                         status =
 376                             acpi_rs_dma_stream(linked_list, &buffer,
 377                                                &bytes_consumed);
 378                         break;
 379
 380                 case ACPI_RSTYPE_START_DPF:
 381                         /*
 382                          * Start Dependent Functions Resource
 383                          */
 384                         status = acpi_rs_start_depend_fns_stream(linked_list,
 385                                                                  &buffer,
 386                                                                  &bytes_consumed);
 387                         break;
 388
 389                 case ACPI_RSTYPE_END_DPF:
 390                         /*
 391                          * End Dependent Functions Resource
 392                          */
 393                         status = acpi_rs_end_depend_fns_stream(linked_list,
 394                                                                &buffer,
 395                                                                &bytes_consumed);
 396                         break;
 397
 398                 case ACPI_RSTYPE_IO:
 399                         /*
 400                          * IO Port Resource
 401                          */
 402                         status =
 403                             acpi_rs_io_stream(linked_list, &buffer,
 404                                               &bytes_consumed);
 405                         break;
 406
 407                 case ACPI_RSTYPE_FIXED_IO:
 408                         /*
 409                          * Fixed IO Port Resource
 410                          */
 411                         status =
 412                             acpi_rs_fixed_io_stream(linked_list, &buffer,
 413                                                     &bytes_consumed);
 414                         break;
 415
 416                 case ACPI_RSTYPE_VENDOR:
 417                         /*
 418                          * Vendor Defined Resource
 419                          */
 420                         status =
 421                             acpi_rs_vendor_stream(linked_list, &buffer,
 422                                                   &bytes_consumed);
 423                         break;
 424
 425                 case ACPI_RSTYPE_END_TAG:
 426                         /*
 427                          * End Tag
 428                          */
 429                         status =
 430                             acpi_rs_end_tag_stream(linked_list, &buffer,
 431                                                    &bytes_consumed);
 432
 433                         /* An End Tag indicates the end of the Resource Template */
 434
 435                         done = TRUE;
 436                         break;
 437
 438                 case ACPI_RSTYPE_MEM24:
 439                         /*
 440                          * 24-Bit Memory Resource
 441                          */
 442                         status =
 443                             acpi_rs_memory24_stream(linked_list, &buffer,
 444                                                     &bytes_consumed);
 445                         break;
 446
 447                 case ACPI_RSTYPE_MEM32:
 448                         /*
 449                          * 32-Bit Memory Range Resource
 450                          */
 451                         status =
 452                             acpi_rs_memory32_range_stream(linked_list, &buffer,
 453                                                           &bytes_consumed);
 454                         break;
 455
 456                 case ACPI_RSTYPE_FIXED_MEM32:
 457                         /*
 458                          * 32-Bit Fixed Memory Resource
 459                          */
 460                         status =
 461                             acpi_rs_fixed_memory32_stream(linked_list, &buffer,
 462                                                           &bytes_consumed);
 463                         break;
 464
 465                 case ACPI_RSTYPE_ADDRESS16:
 466                         /*
 467                          * 16-Bit Address Descriptor Resource
 468                          */
 469                         status = acpi_rs_address16_stream(linked_list, &buffer,
 470                                                           &bytes_consumed);
 471                         break;
 472
 473                 case ACPI_RSTYPE_ADDRESS32:
 474                         /*
 475                          * 32-Bit Address Descriptor Resource
 476                          */
 477                         status = acpi_rs_address32_stream(linked_list, &buffer,
 478                                                           &bytes_consumed);
 479                         break;
 480
 481                 case ACPI_RSTYPE_ADDRESS64:
 482                         /*
 483                          * 64-Bit Address Descriptor Resource
 484                          */
 485                         status = acpi_rs_address64_stream(linked_list, &buffer,
 486                                                           &bytes_consumed);
 487                         break;
 488
 489                 case ACPI_RSTYPE_EXT_IRQ:
 490                         /*
 491                          * Extended IRQ Resource
 492                          */
 493                         status =
 494                             acpi_rs_extended_irq_stream(linked_list, &buffer,
 495                                                         &bytes_consumed);
 496                         break;
 497
 498                 default:
 499                         /*
 500                          * If we get here, everything is out of sync,
 501                          * so exit with an error
 502                          */
 503                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 504                                           "Invalid descriptor type (%X) in resource list\n",
 505                                           linked_list->id));
 506                         status = AE_BAD_DATA;
 507                         break;
 508                 }
 509
 510                 if (ACPI_FAILURE(status)) {
 511                         return_ACPI_STATUS(status);
 512                 }
 513
 514                 /* Set the Buffer to point to the open byte */
 515
 516                 buffer += bytes_consumed;
 517
 518                 /* Point to the next object */
 519
 520                 linked_list = ACPI_PTR_ADD(struct acpi_resource,
 521                                            linked_list, linked_list->length);
 522         }
 523
 524         return_ACPI_STATUS(AE_OK);
 525 }