1 /******************************************************************************* 2 * 3 * Module Name: rscalc - Calculate stream and list lengths 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acresrc.h" 155 #include "acnamesp.h" 156 157 158 #define _COMPONENT ACPI_RESOURCES 159 ACPI_MODULE_NAME ("rscalc") 160 161 162 /* Local prototypes */ 163 164 static UINT8 165 AcpiRsCountSetBits ( 166 UINT16 BitField); 167 168 static ACPI_RS_LENGTH 169 AcpiRsStructOptionLength ( 170 ACPI_RESOURCE_SOURCE *ResourceSource); 171 172 static UINT32 173 AcpiRsStreamOptionLength ( 174 UINT32 ResourceLength, 175 UINT32 MinimumTotalLength); 176 177 178 /******************************************************************************* 179 * 180 * FUNCTION: AcpiRsCountSetBits 181 * 182 * PARAMETERS: BitField - Field in which to count bits 183 * 184 * RETURN: Number of bits set within the field 185 * 186 * DESCRIPTION: Count the number of bits set in a resource field. Used for 187 * (Short descriptor) interrupt and DMA lists. 188 * 189 ******************************************************************************/ 190 191 static UINT8 192 AcpiRsCountSetBits ( 193 UINT16 BitField) 194 { 195 UINT8 BitsSet; 196 197 198 ACPI_FUNCTION_ENTRY (); 199 200 201 for (BitsSet = 0; BitField; BitsSet++) 202 { 203 /* Zero the least significant bit that is set */ 204 205 BitField &= (UINT16) (BitField - 1); 206 } 207 208 return (BitsSet); 209 } 210 211 212 /******************************************************************************* 213 * 214 * FUNCTION: AcpiRsStructOptionLength 215 * 216 * PARAMETERS: ResourceSource - Pointer to optional descriptor field 217 * 218 * RETURN: Status 219 * 220 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and 221 * ResourceSource fields in some Large descriptors. Used during 222 * list-to-stream conversion 223 * 224 ******************************************************************************/ 225 226 static ACPI_RS_LENGTH 227 AcpiRsStructOptionLength ( 228 ACPI_RESOURCE_SOURCE *ResourceSource) 229 { 230 ACPI_FUNCTION_ENTRY (); 231 232 233 /* 234 * If the ResourceSource string is valid, return the size of the string 235 * (StringLength includes the NULL terminator) plus the size of the 236 * ResourceSourceIndex (1). 237 */ 238 if (ResourceSource->StringPtr) 239 { 240 return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1)); 241 } 242 243 return (0); 244 } 245 246 247 /******************************************************************************* 248 * 249 * FUNCTION: AcpiRsStreamOptionLength 250 * 251 * PARAMETERS: ResourceLength - Length from the resource header 252 * MinimumTotalLength - Minimum length of this resource, before 253 * any optional fields. Includes header size 254 * 255 * RETURN: Length of optional string (0 if no string present) 256 * 257 * DESCRIPTION: Common code to handle optional ResourceSourceIndex and 258 * ResourceSource fields in some Large descriptors. Used during 259 * stream-to-list conversion 260 * 261 ******************************************************************************/ 262 263 static UINT32 264 AcpiRsStreamOptionLength ( 265 UINT32 ResourceLength, 266 UINT32 MinimumAmlResourceLength) 267 { 268 UINT32 StringLength = 0; 269 270 271 ACPI_FUNCTION_ENTRY (); 272 273 274 /* 275 * The ResourceSourceIndex and ResourceSource are optional elements of 276 * some Large-type resource descriptors. 277 */ 278 279 /* 280 * If the length of the actual resource descriptor is greater than the 281 * ACPI spec-defined minimum length, it means that a ResourceSourceIndex 282 * exists and is followed by a (required) null terminated string. The 283 * string length (including the null terminator) is the resource length 284 * minus the minimum length, minus one byte for the ResourceSourceIndex 285 * itself. 286 */ 287 if (ResourceLength > MinimumAmlResourceLength) 288 { 289 /* Compute the length of the optional string */ 290 291 StringLength = ResourceLength - MinimumAmlResourceLength - 1; 292 } 293 294 /* 295 * Round the length up to a multiple of the native word in order to 296 * guarantee that the entire resource descriptor is native word aligned 297 */ 298 return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength)); 299 } 300 301 302 /******************************************************************************* 303 * 304 * FUNCTION: AcpiRsGetAmlLength 305 * 306 * PARAMETERS: Resource - Pointer to the resource linked list 307 * ResourceListSize - Size of the resource linked list 308 * SizeNeeded - Where the required size is returned 309 * 310 * RETURN: Status 311 * 312 * DESCRIPTION: Takes a linked list of internal resource descriptors and 313 * calculates the size buffer needed to hold the corresponding 314 * external resource byte stream. 315 * 316 ******************************************************************************/ 317 318 ACPI_STATUS 319 AcpiRsGetAmlLength ( 320 ACPI_RESOURCE *Resource, 321 ACPI_SIZE ResourceListSize, 322 ACPI_SIZE *SizeNeeded) 323 { 324 ACPI_SIZE AmlSizeNeeded = 0; 325 ACPI_RESOURCE *ResourceEnd; 326 ACPI_RS_LENGTH TotalSize; 327 328 329 ACPI_FUNCTION_TRACE (RsGetAmlLength); 330 331 332 /* Traverse entire list of internal resource descriptors */ 333 334 ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, ResourceListSize); 335 while (Resource < ResourceEnd) 336 { 337 /* Validate the descriptor type */ 338 339 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 340 { 341 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 342 } 343 344 /* Sanity check the length. It must not be zero, or we loop forever */ 345 346 if (!Resource->Length) 347 { 348 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 349 } 350 351 /* Get the base size of the (external stream) resource descriptor */ 352 353 TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type]; 354 355 /* 356 * Augment the base size for descriptors with optional and/or 357 * variable-length fields 358 */ 359 switch (Resource->Type) 360 { 361 case ACPI_RESOURCE_TYPE_IRQ: 362 363 /* Length can be 3 or 2 */ 364 365 if (Resource->Data.Irq.DescriptorLength == 2) 366 { 367 TotalSize--; 368 } 369 break; 370 371 372 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 373 374 /* Length can be 1 or 0 */ 375 376 if (Resource->Data.Irq.DescriptorLength == 0) 377 { 378 TotalSize--; 379 } 380 break; 381 382 383 case ACPI_RESOURCE_TYPE_VENDOR: 384 /* 385 * Vendor Defined Resource: 386 * For a Vendor Specific resource, if the Length is between 1 and 7 387 * it will be created as a Small Resource data type, otherwise it 388 * is a Large Resource data type. 389 */ 390 if (Resource->Data.Vendor.ByteLength > 7) 391 { 392 /* Base size of a Large resource descriptor */ 393 394 TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER); 395 } 396 397 /* Add the size of the vendor-specific data */ 398 399 TotalSize = (ACPI_RS_LENGTH) 400 (TotalSize + Resource->Data.Vendor.ByteLength); 401 break; 402 403 404 case ACPI_RESOURCE_TYPE_END_TAG: 405 /* 406 * End Tag: 407 * We are done -- return the accumulated total size. 408 */ 409 *SizeNeeded = AmlSizeNeeded + TotalSize; 410 411 /* Normal exit */ 412 413 return_ACPI_STATUS (AE_OK); 414 415 416 case ACPI_RESOURCE_TYPE_ADDRESS16: 417 /* 418 * 16-Bit Address Resource: 419 * Add the size of the optional ResourceSource info 420 */ 421 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 422 AcpiRsStructOptionLength ( 423 &Resource->Data.Address16.ResourceSource)); 424 break; 425 426 427 case ACPI_RESOURCE_TYPE_ADDRESS32: 428 /* 429 * 32-Bit Address Resource: 430 * Add the size of the optional ResourceSource info 431 */ 432 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 433 AcpiRsStructOptionLength ( 434 &Resource->Data.Address32.ResourceSource)); 435 break; 436 437 438 case ACPI_RESOURCE_TYPE_ADDRESS64: 439 /* 440 * 64-Bit Address Resource: 441 * Add the size of the optional ResourceSource info 442 */ 443 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 444 AcpiRsStructOptionLength ( 445 &Resource->Data.Address64.ResourceSource)); 446 break; 447 448 449 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 450 /* 451 * Extended IRQ Resource: 452 * Add the size of each additional optional interrupt beyond the 453 * required 1 (4 bytes for each UINT32 interrupt number) 454 */ 455 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 456 ((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) + 457 458 /* Add the size of the optional ResourceSource info */ 459 460 AcpiRsStructOptionLength ( 461 &Resource->Data.ExtendedIrq.ResourceSource)); 462 break; 463 464 465 case ACPI_RESOURCE_TYPE_GPIO: 466 467 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 468 (Resource->Data.Gpio.PinTableLength * 2) + 469 Resource->Data.Gpio.ResourceSource.StringLength + 470 Resource->Data.Gpio.VendorLength); 471 472 break; 473 474 case ACPI_RESOURCE_TYPE_PIN_FUNCTION: 475 476 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 477 (Resource->Data.PinFunction.PinTableLength * 2) + 478 Resource->Data.PinFunction.ResourceSource.StringLength + 479 Resource->Data.PinFunction.VendorLength); 480 481 break; 482 483 484 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 485 486 TotalSize = AcpiGbl_AmlResourceSerialBusSizes [ 487 Resource->Data.CommonSerialBus.Type]; 488 489 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 490 Resource->Data.I2cSerialBus.ResourceSource.StringLength + 491 Resource->Data.I2cSerialBus.VendorLength); 492 493 break; 494 495 case ACPI_RESOURCE_TYPE_PIN_CONFIG: 496 497 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 498 (Resource->Data.PinConfig.PinTableLength * 2) + 499 Resource->Data.PinConfig.ResourceSource.StringLength + 500 Resource->Data.PinConfig.VendorLength); 501 502 break; 503 504 case ACPI_RESOURCE_TYPE_PIN_GROUP: 505 506 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 507 (Resource->Data.PinGroup.PinTableLength * 2) + 508 Resource->Data.PinGroup.ResourceLabel.StringLength + 509 Resource->Data.PinGroup.VendorLength); 510 511 break; 512 513 case ACPI_RESOURCE_TYPE_PIN_GROUP_FUNCTION: 514 515 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 516 Resource->Data.PinGroupFunction.ResourceSource.StringLength + 517 Resource->Data.PinGroupFunction.ResourceSourceLabel.StringLength + 518 Resource->Data.PinGroupFunction.VendorLength); 519 520 break; 521 522 case ACPI_RESOURCE_TYPE_PIN_GROUP_CONFIG: 523 524 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 525 Resource->Data.PinGroupConfig.ResourceSource.StringLength + 526 Resource->Data.PinGroupConfig.ResourceSourceLabel.StringLength + 527 Resource->Data.PinGroupConfig.VendorLength); 528 529 break; 530 531 default: 532 533 break; 534 } 535 536 /* Update the total */ 537 538 AmlSizeNeeded += TotalSize; 539 540 /* Point to the next object */ 541 542 Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length); 543 } 544 545 /* Did not find an EndTag resource descriptor */ 546 547 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 548 } 549 550 551 /******************************************************************************* 552 * 553 * FUNCTION: AcpiRsGetListLength 554 * 555 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream 556 * AmlBufferLength - Size of AmlBuffer 557 * SizeNeeded - Where the size needed is returned 558 * 559 * RETURN: Status 560 * 561 * DESCRIPTION: Takes an external resource byte stream and calculates the size 562 * buffer needed to hold the corresponding internal resource 563 * descriptor linked list. 564 * 565 ******************************************************************************/ 566 567 ACPI_STATUS 568 AcpiRsGetListLength ( 569 UINT8 *AmlBuffer, 570 UINT32 AmlBufferLength, 571 ACPI_SIZE *SizeNeeded) 572 { 573 ACPI_STATUS Status; 574 UINT8 *EndAml; 575 UINT8 *Buffer; 576 UINT32 BufferSize; 577 UINT16 Temp16; 578 UINT16 ResourceLength; 579 UINT32 ExtraStructBytes; 580 UINT8 ResourceIndex; 581 UINT8 MinimumAmlResourceLength; 582 AML_RESOURCE *AmlResource; 583 584 585 ACPI_FUNCTION_TRACE (RsGetListLength); 586 587 588 *SizeNeeded = ACPI_RS_SIZE_MIN; /* Minimum size is one EndTag */ 589 EndAml = AmlBuffer + AmlBufferLength; 590 591 /* Walk the list of AML resource descriptors */ 592 593 while (AmlBuffer < EndAml) 594 { 595 /* Validate the Resource Type and Resource Length */ 596 597 Status = AcpiUtValidateResource (NULL, AmlBuffer, &ResourceIndex); 598 if (ACPI_FAILURE (Status)) 599 { 600 /* 601 * Exit on failure. Cannot continue because the descriptor length 602 * may be bogus also. 603 */ 604 return_ACPI_STATUS (Status); 605 } 606 607 AmlResource = (void *) AmlBuffer; 608 609 /* Get the resource length and base (minimum) AML size */ 610 611 ResourceLength = AcpiUtGetResourceLength (AmlBuffer); 612 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex]; 613 614 /* 615 * Augment the size for descriptors with optional 616 * and/or variable length fields 617 */ 618 ExtraStructBytes = 0; 619 Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer); 620 621 switch (AcpiUtGetResourceType (AmlBuffer)) 622 { 623 case ACPI_RESOURCE_NAME_IRQ: 624 /* 625 * IRQ Resource: 626 * Get the number of bits set in the 16-bit IRQ mask 627 */ 628 ACPI_MOVE_16_TO_16 (&Temp16, Buffer); 629 ExtraStructBytes = AcpiRsCountSetBits (Temp16); 630 break; 631 632 633 case ACPI_RESOURCE_NAME_DMA: 634 /* 635 * DMA Resource: 636 * Get the number of bits set in the 8-bit DMA mask 637 */ 638 ExtraStructBytes = AcpiRsCountSetBits (*Buffer); 639 break; 640 641 642 case ACPI_RESOURCE_NAME_VENDOR_SMALL: 643 case ACPI_RESOURCE_NAME_VENDOR_LARGE: 644 /* 645 * Vendor Resource: 646 * Get the number of vendor data bytes 647 */ 648 ExtraStructBytes = ResourceLength; 649 650 /* 651 * There is already one byte included in the minimum 652 * descriptor size. If there are extra struct bytes, 653 * subtract one from the count. 654 */ 655 if (ExtraStructBytes) 656 { 657 ExtraStructBytes--; 658 } 659 break; 660 661 662 case ACPI_RESOURCE_NAME_END_TAG: 663 /* 664 * End Tag: This is the normal exit 665 */ 666 return_ACPI_STATUS (AE_OK); 667 668 669 case ACPI_RESOURCE_NAME_ADDRESS32: 670 case ACPI_RESOURCE_NAME_ADDRESS16: 671 case ACPI_RESOURCE_NAME_ADDRESS64: 672 /* 673 * Address Resource: 674 * Add the size of the optional ResourceSource 675 */ 676 ExtraStructBytes = AcpiRsStreamOptionLength ( 677 ResourceLength, MinimumAmlResourceLength); 678 break; 679 680 681 case ACPI_RESOURCE_NAME_EXTENDED_IRQ: 682 /* 683 * Extended IRQ Resource: 684 * Using the InterruptTableLength, add 4 bytes for each additional 685 * interrupt. Note: at least one interrupt is required and is 686 * included in the minimum descriptor size (reason for the -1) 687 */ 688 ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32); 689 690 /* Add the size of the optional ResourceSource */ 691 692 ExtraStructBytes += AcpiRsStreamOptionLength ( 693 ResourceLength - ExtraStructBytes, MinimumAmlResourceLength); 694 break; 695 696 case ACPI_RESOURCE_NAME_GPIO: 697 698 /* Vendor data is optional */ 699 700 if (AmlResource->Gpio.VendorLength) 701 { 702 ExtraStructBytes += 703 AmlResource->Gpio.VendorOffset - 704 AmlResource->Gpio.PinTableOffset + 705 AmlResource->Gpio.VendorLength; 706 } 707 else 708 { 709 ExtraStructBytes += 710 AmlResource->LargeHeader.ResourceLength + 711 sizeof (AML_RESOURCE_LARGE_HEADER) - 712 AmlResource->Gpio.PinTableOffset; 713 } 714 break; 715 716 case ACPI_RESOURCE_NAME_PIN_FUNCTION: 717 718 /* Vendor data is optional */ 719 720 if (AmlResource->PinFunction.VendorLength) 721 { 722 ExtraStructBytes += 723 AmlResource->PinFunction.VendorOffset - 724 AmlResource->PinFunction.PinTableOffset + 725 AmlResource->PinFunction.VendorLength; 726 } 727 else 728 { 729 ExtraStructBytes += 730 AmlResource->LargeHeader.ResourceLength + 731 sizeof (AML_RESOURCE_LARGE_HEADER) - 732 AmlResource->PinFunction.PinTableOffset; 733 } 734 break; 735 736 case ACPI_RESOURCE_NAME_SERIAL_BUS: 737 738 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[ 739 AmlResource->CommonSerialBus.Type]; 740 ExtraStructBytes += 741 AmlResource->CommonSerialBus.ResourceLength - 742 MinimumAmlResourceLength; 743 break; 744 745 case ACPI_RESOURCE_NAME_PIN_CONFIG: 746 747 /* Vendor data is optional */ 748 749 if (AmlResource->PinConfig.VendorLength) 750 { 751 ExtraStructBytes += 752 AmlResource->PinConfig.VendorOffset - 753 AmlResource->PinConfig.PinTableOffset + 754 AmlResource->PinConfig.VendorLength; 755 } 756 else 757 { 758 ExtraStructBytes += 759 AmlResource->LargeHeader.ResourceLength + 760 sizeof (AML_RESOURCE_LARGE_HEADER) - 761 AmlResource->PinConfig.PinTableOffset; 762 } 763 break; 764 765 case ACPI_RESOURCE_NAME_PIN_GROUP: 766 767 ExtraStructBytes += 768 AmlResource->PinGroup.VendorOffset - 769 AmlResource->PinGroup.PinTableOffset + 770 AmlResource->PinGroup.VendorLength; 771 772 break; 773 774 case ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION: 775 776 ExtraStructBytes += 777 AmlResource->PinGroupFunction.VendorOffset - 778 AmlResource->PinGroupFunction.ResSourceOffset + 779 AmlResource->PinGroupFunction.VendorLength; 780 781 break; 782 783 case ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG: 784 785 ExtraStructBytes += 786 AmlResource->PinGroupConfig.VendorOffset - 787 AmlResource->PinGroupConfig.ResSourceOffset + 788 AmlResource->PinGroupConfig.VendorLength; 789 790 break; 791 792 default: 793 794 break; 795 } 796 797 /* 798 * Update the required buffer size for the internal descriptor structs 799 * 800 * Important: Round the size up for the appropriate alignment. This 801 * is a requirement on IA64. 802 */ 803 if (AcpiUtGetResourceType (AmlBuffer) == 804 ACPI_RESOURCE_NAME_SERIAL_BUS) 805 { 806 BufferSize = AcpiGbl_ResourceStructSerialBusSizes[ 807 AmlResource->CommonSerialBus.Type] + ExtraStructBytes; 808 } 809 else 810 { 811 BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] + 812 ExtraStructBytes; 813 } 814 815 BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize); 816 *SizeNeeded += BufferSize; 817 818 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 819 "Type %.2X, AmlLength %.2X InternalLength %.2X%8X\n", 820 AcpiUtGetResourceType (AmlBuffer), 821 AcpiUtGetDescriptorLength (AmlBuffer), ACPI_FORMAT_UINT64(*SizeNeeded))); 822 823 /* 824 * Point to the next resource within the AML stream using the length 825 * contained in the resource descriptor header 826 */ 827 AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer); 828 } 829 830 /* Did not find an EndTag resource descriptor */ 831 832 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 833 } 834 835 836 /******************************************************************************* 837 * 838 * FUNCTION: AcpiRsGetPciRoutingTableLength 839 * 840 * PARAMETERS: PackageObject - Pointer to the package object 841 * BufferSizeNeeded - UINT32 pointer of the size buffer 842 * needed to properly return the 843 * parsed data 844 * 845 * RETURN: Status 846 * 847 * DESCRIPTION: Given a package representing a PCI routing table, this 848 * calculates the size of the corresponding linked list of 849 * descriptions. 850 * 851 ******************************************************************************/ 852 853 ACPI_STATUS 854 AcpiRsGetPciRoutingTableLength ( 855 ACPI_OPERAND_OBJECT *PackageObject, 856 ACPI_SIZE *BufferSizeNeeded) 857 { 858 UINT32 NumberOfElements; 859 ACPI_SIZE TempSizeNeeded = 0; 860 ACPI_OPERAND_OBJECT **TopObjectList; 861 UINT32 Index; 862 ACPI_OPERAND_OBJECT *PackageElement; 863 ACPI_OPERAND_OBJECT **SubObjectList; 864 BOOLEAN NameFound; 865 UINT32 TableIndex; 866 867 868 ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength); 869 870 871 NumberOfElements = PackageObject->Package.Count; 872 873 /* 874 * Calculate the size of the return buffer. 875 * The base size is the number of elements * the sizes of the 876 * structures. Additional space for the strings is added below. 877 * The minus one is to subtract the size of the UINT8 Source[1] 878 * member because it is added below. 879 * 880 * But each PRT_ENTRY structure has a pointer to a string and 881 * the size of that string must be found. 882 */ 883 TopObjectList = PackageObject->Package.Elements; 884 885 for (Index = 0; Index < NumberOfElements; Index++) 886 { 887 /* Dereference the subpackage */ 888 889 PackageElement = *TopObjectList; 890 891 /* We must have a valid Package object */ 892 893 if (!PackageElement || 894 (PackageElement->Common.Type != ACPI_TYPE_PACKAGE)) 895 { 896 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 897 } 898 899 /* 900 * The SubObjectList will now point to an array of the 901 * four IRQ elements: Address, Pin, Source and SourceIndex 902 */ 903 SubObjectList = PackageElement->Package.Elements; 904 905 /* Scan the IrqTableElements for the Source Name String */ 906 907 NameFound = FALSE; 908 909 for (TableIndex = 0; 910 TableIndex < PackageElement->Package.Count && !NameFound; 911 TableIndex++) 912 { 913 if (*SubObjectList && /* Null object allowed */ 914 915 ((ACPI_TYPE_STRING == 916 (*SubObjectList)->Common.Type) || 917 918 ((ACPI_TYPE_LOCAL_REFERENCE == 919 (*SubObjectList)->Common.Type) && 920 921 ((*SubObjectList)->Reference.Class == 922 ACPI_REFCLASS_NAME)))) 923 { 924 NameFound = TRUE; 925 } 926 else 927 { 928 /* Look at the next element */ 929 930 SubObjectList++; 931 } 932 } 933 934 TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4); 935 936 /* Was a String type found? */ 937 938 if (NameFound) 939 { 940 if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING) 941 { 942 /* 943 * The length String.Length field does not include the 944 * terminating NULL, add 1 945 */ 946 TempSizeNeeded += ((ACPI_SIZE) 947 (*SubObjectList)->String.Length + 1); 948 } 949 else 950 { 951 TempSizeNeeded += AcpiNsGetPathnameLength ( 952 (*SubObjectList)->Reference.Node); 953 } 954 } 955 else 956 { 957 /* 958 * If no name was found, then this is a NULL, which is 959 * translated as a UINT32 zero. 960 */ 961 TempSizeNeeded += sizeof (UINT32); 962 } 963 964 /* Round up the size since each element must be aligned */ 965 966 TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded); 967 968 /* Point to the next ACPI_OPERAND_OBJECT */ 969 970 TopObjectList++; 971 } 972 973 /* 974 * Add an extra element to the end of the list, essentially a 975 * NULL terminator 976 */ 977 *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE); 978 return_ACPI_STATUS (AE_OK); 979 } 980