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 - 2023, 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 164static UINT8 165AcpiRsCountSetBits ( 166 UINT16 BitField); 167 168static ACPI_RS_LENGTH 169AcpiRsStructOptionLength ( 170 ACPI_RESOURCE_SOURCE *ResourceSource); 171 172static UINT32 173AcpiRsStreamOptionLength ( 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 191static UINT8 192AcpiRsCountSetBits ( 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 226static ACPI_RS_LENGTH 227AcpiRsStructOptionLength ( 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 263static UINT32 264AcpiRsStreamOptionLength ( 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 318ACPI_STATUS 319AcpiRsGetAmlLength ( 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 case ACPI_RESOURCE_TYPE_CLOCK_INPUT: 484 485 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 486 Resource->Data.ClockInput.ResourceSource.StringLength); 487 488 break; 489 490 491 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 492 493 TotalSize = AcpiGbl_AmlResourceSerialBusSizes [ 494 Resource->Data.CommonSerialBus.Type]; 495 496 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 497 Resource->Data.I2cSerialBus.ResourceSource.StringLength + 498 Resource->Data.I2cSerialBus.VendorLength); 499 500 break; 501 502 case ACPI_RESOURCE_TYPE_PIN_CONFIG: 503 504 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 505 (Resource->Data.PinConfig.PinTableLength * 2) + 506 Resource->Data.PinConfig.ResourceSource.StringLength + 507 Resource->Data.PinConfig.VendorLength); 508 509 break; 510 511 case ACPI_RESOURCE_TYPE_PIN_GROUP: 512 513 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 514 (Resource->Data.PinGroup.PinTableLength * 2) + 515 Resource->Data.PinGroup.ResourceLabel.StringLength + 516 Resource->Data.PinGroup.VendorLength); 517 518 break; 519 520 case ACPI_RESOURCE_TYPE_PIN_GROUP_FUNCTION: 521 522 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 523 Resource->Data.PinGroupFunction.ResourceSource.StringLength + 524 Resource->Data.PinGroupFunction.ResourceSourceLabel.StringLength + 525 Resource->Data.PinGroupFunction.VendorLength); 526 527 break; 528 529 case ACPI_RESOURCE_TYPE_PIN_GROUP_CONFIG: 530 531 TotalSize = (ACPI_RS_LENGTH) (TotalSize + 532 Resource->Data.PinGroupConfig.ResourceSource.StringLength + 533 Resource->Data.PinGroupConfig.ResourceSourceLabel.StringLength + 534 Resource->Data.PinGroupConfig.VendorLength); 535 536 break; 537 538 default: 539 540 break; 541 } 542 543 /* Update the total */ 544 545 AmlSizeNeeded += TotalSize; 546 547 /* Point to the next object */ 548 549 Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length); 550 } 551 552 /* Did not find an EndTag resource descriptor */ 553 554 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 555} 556 557 558/******************************************************************************* 559 * 560 * FUNCTION: AcpiRsGetListLength 561 * 562 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream 563 * AmlBufferLength - Size of AmlBuffer 564 * SizeNeeded - Where the size needed is returned 565 * 566 * RETURN: Status 567 * 568 * DESCRIPTION: Takes an external resource byte stream and calculates the size 569 * buffer needed to hold the corresponding internal resource 570 * descriptor linked list. 571 * 572 ******************************************************************************/ 573 574ACPI_STATUS 575AcpiRsGetListLength ( 576 UINT8 *AmlBuffer, 577 UINT32 AmlBufferLength, 578 ACPI_SIZE *SizeNeeded) 579{ 580 ACPI_STATUS Status; 581 UINT8 *EndAml; 582 UINT8 *Buffer; 583 UINT32 BufferSize; 584 UINT16 Temp16; 585 UINT16 ResourceLength; 586 UINT32 ExtraStructBytes; 587 UINT8 ResourceIndex; 588 UINT8 MinimumAmlResourceLength; 589 AML_RESOURCE *AmlResource; 590 591 592 ACPI_FUNCTION_TRACE (RsGetListLength); 593 594 595 *SizeNeeded = ACPI_RS_SIZE_MIN; /* Minimum size is one EndTag */ 596 EndAml = AmlBuffer + AmlBufferLength; 597 598 /* Walk the list of AML resource descriptors */ 599 600 while (AmlBuffer < EndAml) 601 { 602 /* Validate the Resource Type and Resource Length */ 603 604 Status = AcpiUtValidateResource (NULL, AmlBuffer, &ResourceIndex); 605 if (ACPI_FAILURE (Status)) 606 { 607 /* 608 * Exit on failure. Cannot continue because the descriptor length 609 * may be bogus also. 610 */ 611 return_ACPI_STATUS (Status); 612 } 613 614 AmlResource = (void *) AmlBuffer; 615 616 /* Get the resource length and base (minimum) AML size */ 617 618 ResourceLength = AcpiUtGetResourceLength (AmlBuffer); 619 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex]; 620 621 /* 622 * Augment the size for descriptors with optional 623 * and/or variable length fields 624 */ 625 ExtraStructBytes = 0; 626 Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer); 627 628 switch (AcpiUtGetResourceType (AmlBuffer)) 629 { 630 case ACPI_RESOURCE_NAME_IRQ: 631 /* 632 * IRQ Resource: 633 * Get the number of bits set in the 16-bit IRQ mask 634 */ 635 ACPI_MOVE_16_TO_16 (&Temp16, Buffer); 636 ExtraStructBytes = AcpiRsCountSetBits (Temp16); 637 break; 638 639 640 case ACPI_RESOURCE_NAME_DMA: 641 /* 642 * DMA Resource: 643 * Get the number of bits set in the 8-bit DMA mask 644 */ 645 ExtraStructBytes = AcpiRsCountSetBits (*Buffer); 646 break; 647 648 649 case ACPI_RESOURCE_NAME_VENDOR_SMALL: 650 case ACPI_RESOURCE_NAME_VENDOR_LARGE: 651 /* 652 * Vendor Resource: 653 * Get the number of vendor data bytes 654 */ 655 ExtraStructBytes = ResourceLength; 656 657 /* 658 * There is already one byte included in the minimum 659 * descriptor size. If there are extra struct bytes, 660 * subtract one from the count. 661 */ 662 if (ExtraStructBytes) 663 { 664 ExtraStructBytes--; 665 } 666 break; 667 668 669 case ACPI_RESOURCE_NAME_END_TAG: 670 /* 671 * End Tag: This is the normal exit 672 */ 673 return_ACPI_STATUS (AE_OK); 674 675 676 case ACPI_RESOURCE_NAME_ADDRESS32: 677 case ACPI_RESOURCE_NAME_ADDRESS16: 678 case ACPI_RESOURCE_NAME_ADDRESS64: 679 /* 680 * Address Resource: 681 * Add the size of the optional ResourceSource 682 */ 683 ExtraStructBytes = AcpiRsStreamOptionLength ( 684 ResourceLength, MinimumAmlResourceLength); 685 break; 686 687 688 case ACPI_RESOURCE_NAME_EXTENDED_IRQ: 689 /* 690 * Extended IRQ Resource: 691 * Using the InterruptTableLength, add 4 bytes for each additional 692 * interrupt. Note: at least one interrupt is required and is 693 * included in the minimum descriptor size (reason for the -1) 694 */ 695 ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32); 696 697 /* Add the size of the optional ResourceSource */ 698 699 ExtraStructBytes += AcpiRsStreamOptionLength ( 700 ResourceLength - ExtraStructBytes, MinimumAmlResourceLength); 701 break; 702 703 case ACPI_RESOURCE_NAME_GPIO: 704 705 /* Vendor data is optional */ 706 707 if (AmlResource->Gpio.VendorLength) 708 { 709 ExtraStructBytes += 710 AmlResource->Gpio.VendorOffset - 711 AmlResource->Gpio.PinTableOffset + 712 AmlResource->Gpio.VendorLength; 713 } 714 else 715 { 716 ExtraStructBytes += 717 AmlResource->LargeHeader.ResourceLength + 718 sizeof (AML_RESOURCE_LARGE_HEADER) - 719 AmlResource->Gpio.PinTableOffset; 720 } 721 break; 722 723 case ACPI_RESOURCE_NAME_PIN_FUNCTION: 724 725 /* Vendor data is optional */ 726 727 if (AmlResource->PinFunction.VendorLength) 728 { 729 ExtraStructBytes += 730 AmlResource->PinFunction.VendorOffset - 731 AmlResource->PinFunction.PinTableOffset + 732 AmlResource->PinFunction.VendorLength; 733 } 734 else 735 { 736 ExtraStructBytes += 737 AmlResource->LargeHeader.ResourceLength + 738 sizeof (AML_RESOURCE_LARGE_HEADER) - 739 AmlResource->PinFunction.PinTableOffset; 740 } 741 break; 742 743 case ACPI_RESOURCE_NAME_SERIAL_BUS: { 744 /* Avoid undefined behavior: member access within misaligned address */ 745 746 AML_RESOURCE_COMMON_SERIALBUS CommonSerialBus; 747 memcpy(&CommonSerialBus, AmlResource, sizeof(CommonSerialBus)); 748 749 MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[ 750 CommonSerialBus.Type]; 751 ExtraStructBytes += 752 CommonSerialBus.ResourceLength - 753 MinimumAmlResourceLength; 754 break; 755 } 756 757 case ACPI_RESOURCE_NAME_PIN_CONFIG: 758 759 /* Vendor data is optional */ 760 761 if (AmlResource->PinConfig.VendorLength) 762 { 763 ExtraStructBytes += 764 AmlResource->PinConfig.VendorOffset - 765 AmlResource->PinConfig.PinTableOffset + 766 AmlResource->PinConfig.VendorLength; 767 } 768 else 769 { 770 ExtraStructBytes += 771 AmlResource->LargeHeader.ResourceLength + 772 sizeof (AML_RESOURCE_LARGE_HEADER) - 773 AmlResource->PinConfig.PinTableOffset; 774 } 775 break; 776 777 case ACPI_RESOURCE_NAME_PIN_GROUP: 778 779 ExtraStructBytes += 780 AmlResource->PinGroup.VendorOffset - 781 AmlResource->PinGroup.PinTableOffset + 782 AmlResource->PinGroup.VendorLength; 783 784 break; 785 786 case ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION: 787 788 ExtraStructBytes += 789 AmlResource->PinGroupFunction.VendorOffset - 790 AmlResource->PinGroupFunction.ResSourceOffset + 791 AmlResource->PinGroupFunction.VendorLength; 792 793 break; 794 795 case ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG: 796 797 ExtraStructBytes += 798 AmlResource->PinGroupConfig.VendorOffset - 799 AmlResource->PinGroupConfig.ResSourceOffset + 800 AmlResource->PinGroupConfig.VendorLength; 801 802 break; 803 804 case ACPI_RESOURCE_NAME_CLOCK_INPUT: 805 ExtraStructBytes = AcpiRsStreamOptionLength ( 806 ResourceLength, MinimumAmlResourceLength); 807 808 break; 809 810 default: 811 812 break; 813 } 814 815 /* 816 * Update the required buffer size for the internal descriptor structs 817 * 818 * Important: Round the size up for the appropriate alignment. This 819 * is a requirement on IA64. 820 */ 821 if (AcpiUtGetResourceType (AmlBuffer) == 822 ACPI_RESOURCE_NAME_SERIAL_BUS) 823 { 824 /* Avoid undefined behavior: member access within misaligned address */ 825 826 AML_RESOURCE_COMMON_SERIALBUS CommonSerialBus; 827 memcpy(&CommonSerialBus, AmlResource, sizeof(CommonSerialBus)); 828 829 BufferSize = AcpiGbl_ResourceStructSerialBusSizes[ 830 CommonSerialBus.Type] + ExtraStructBytes; 831 } 832 else 833 { 834 BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] + 835 ExtraStructBytes; 836 } 837 838 BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize); 839 *SizeNeeded += BufferSize; 840 841 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 842 "Type %.2X, AmlLength %.2X InternalLength %.2X%8X\n", 843 AcpiUtGetResourceType (AmlBuffer), 844 AcpiUtGetDescriptorLength (AmlBuffer), ACPI_FORMAT_UINT64(*SizeNeeded))); 845 846 /* 847 * Point to the next resource within the AML stream using the length 848 * contained in the resource descriptor header 849 */ 850 AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer); 851 } 852 853 /* Did not find an EndTag resource descriptor */ 854 855 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 856} 857 858 859/******************************************************************************* 860 * 861 * FUNCTION: AcpiRsGetPciRoutingTableLength 862 * 863 * PARAMETERS: PackageObject - Pointer to the package object 864 * BufferSizeNeeded - UINT32 pointer of the size buffer 865 * needed to properly return the 866 * parsed data 867 * 868 * RETURN: Status 869 * 870 * DESCRIPTION: Given a package representing a PCI routing table, this 871 * calculates the size of the corresponding linked list of 872 * descriptions. 873 * 874 ******************************************************************************/ 875 876ACPI_STATUS 877AcpiRsGetPciRoutingTableLength ( 878 ACPI_OPERAND_OBJECT *PackageObject, 879 ACPI_SIZE *BufferSizeNeeded) 880{ 881 UINT32 NumberOfElements; 882 ACPI_SIZE TempSizeNeeded = 0; 883 ACPI_OPERAND_OBJECT **TopObjectList; 884 UINT32 Index; 885 ACPI_OPERAND_OBJECT *PackageElement; 886 ACPI_OPERAND_OBJECT **SubObjectList; 887 BOOLEAN NameFound; 888 UINT32 TableIndex; 889 890 891 ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength); 892 893 894 NumberOfElements = PackageObject->Package.Count; 895 896 /* 897 * Calculate the size of the return buffer. 898 * The base size is the number of elements * the sizes of the 899 * structures. Additional space for the strings is added below. 900 * The minus one is to subtract the size of the UINT8 Source[1] 901 * member because it is added below. 902 * 903 * But each PRT_ENTRY structure has a pointer to a string and 904 * the size of that string must be found. 905 */ 906 TopObjectList = PackageObject->Package.Elements; 907 908 for (Index = 0; Index < NumberOfElements; Index++) 909 { 910 /* Dereference the subpackage */ 911 912 PackageElement = *TopObjectList; 913 914 /* We must have a valid Package object */ 915 916 if (!PackageElement || 917 (PackageElement->Common.Type != ACPI_TYPE_PACKAGE)) 918 { 919 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 920 } 921 922 /* 923 * The SubObjectList will now point to an array of the 924 * four IRQ elements: Address, Pin, Source and SourceIndex 925 */ 926 SubObjectList = PackageElement->Package.Elements; 927 928 /* Scan the IrqTableElements for the Source Name String */ 929 930 NameFound = FALSE; 931 932 for (TableIndex = 0; 933 TableIndex < PackageElement->Package.Count && !NameFound; 934 TableIndex++) 935 { 936 if (*SubObjectList && /* Null object allowed */ 937 938 ((ACPI_TYPE_STRING == 939 (*SubObjectList)->Common.Type) || 940 941 ((ACPI_TYPE_LOCAL_REFERENCE == 942 (*SubObjectList)->Common.Type) && 943 944 ((*SubObjectList)->Reference.Class == 945 ACPI_REFCLASS_NAME)))) 946 { 947 NameFound = TRUE; 948 } 949 else 950 { 951 /* Look at the next element */ 952 953 SubObjectList++; 954 } 955 } 956 957 TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4); 958 959 /* Was a String type found? */ 960 961 if (NameFound) 962 { 963 if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING) 964 { 965 /* 966 * The length String.Length field does not include the 967 * terminating NULL, add 1 968 */ 969 TempSizeNeeded += ((ACPI_SIZE) 970 (*SubObjectList)->String.Length + 1); 971 } 972 else 973 { 974 TempSizeNeeded += AcpiNsGetPathnameLength ( 975 (*SubObjectList)->Reference.Node); 976 } 977 } 978 else 979 { 980 /* 981 * If no name was found, then this is a NULL, which is 982 * translated as a UINT32 zero. 983 */ 984 TempSizeNeeded += sizeof (UINT32); 985 } 986 987 /* Round up the size since each element must be aligned */ 988 989 TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded); 990 991 /* Point to the next ACPI_OPERAND_OBJECT */ 992 993 TopObjectList++; 994 } 995 996 /* 997 * Add an extra element to the end of the list, essentially a 998 * NULL terminator 999 */ 1000 *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE); 1001 return_ACPI_STATUS (AE_OK); 1002} 1003