1 /*******************************************************************************
   2  *
   3  * Module Name: rscreate - Create resource lists/tables
   4  *
   5  ******************************************************************************/
   6 
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   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 #define __RSCREATE_C__
  45 
  46 #include "acpi.h"
  47 #include "accommon.h"
  48 #include "acresrc.h"
  49 #include "acnamesp.h"
  50 
  51 #define _COMPONENT          ACPI_RESOURCES
  52         ACPI_MODULE_NAME    ("rscreate")
  53 
  54 
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    AcpiBufferToResource
  58  *
  59  * PARAMETERS:  AmlBuffer           - Pointer to the resource byte stream
  60  *              AmlBufferLength     - Length of the AmlBuffer
  61  *              ResourcePtr         - Where the converted resource is returned
  62  *
  63  * RETURN:      Status
  64  *
  65  * DESCRIPTION: Convert a raw AML buffer to a resource list
  66  *
  67  ******************************************************************************/
  68 
  69 ACPI_STATUS
  70 AcpiBufferToResource (
  71     UINT8                   *AmlBuffer,
  72     UINT16                  AmlBufferLength,
  73     ACPI_RESOURCE           **ResourcePtr)
  74 {
  75     ACPI_STATUS             Status;
  76     ACPI_SIZE               ListSizeNeeded;
  77     void                    *Resource;
  78     void                    *CurrentResourcePtr;
  79 
  80     /*
  81      * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
  82      * is not required here.
  83      */
  84 
  85     /* Get the required length for the converted resource */
  86 
  87     Status = AcpiRsGetListLength (AmlBuffer, AmlBufferLength,
  88                 &ListSizeNeeded);
  89     if (Status == AE_AML_NO_RESOURCE_END_TAG)
  90     {
  91         Status = AE_OK;
  92     }
  93     if (ACPI_FAILURE (Status))
  94     {
  95         return (Status);
  96     }
  97 
  98     /* Allocate a buffer for the converted resource */
  99 
 100     Resource = ACPI_ALLOCATE_ZEROED (ListSizeNeeded);
 101     CurrentResourcePtr = Resource;
 102     if (!Resource)
 103     {
 104         return (AE_NO_MEMORY);
 105     }
 106 
 107     /* Perform the AML-to-Resource conversion */
 108 
 109     Status = AcpiUtWalkAmlResources (NULL, AmlBuffer, AmlBufferLength,
 110                 AcpiRsConvertAmlToResources, &CurrentResourcePtr);
 111     if (Status == AE_AML_NO_RESOURCE_END_TAG)
 112     {
 113         Status = AE_OK;
 114     }
 115     if (ACPI_FAILURE (Status))
 116     {
 117         ACPI_FREE (Resource);
 118     }
 119     else
 120     {
 121         *ResourcePtr = Resource;
 122     }
 123 
 124     return (Status);
 125 }
 126 
 127 
 128 /*******************************************************************************
 129  *
 130  * FUNCTION:    AcpiRsCreateResourceList
 131  *
 132  * PARAMETERS:  AmlBuffer           - Pointer to the resource byte stream
 133  *              OutputBuffer        - Pointer to the user's buffer
 134  *
 135  * RETURN:      Status: AE_OK if okay, else a valid ACPI_STATUS code
 136  *              If OutputBuffer is not large enough, OutputBufferLength
 137  *              indicates how large OutputBuffer should be, else it
 138  *              indicates how may UINT8 elements of OutputBuffer are valid.
 139  *
 140  * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
 141  *              execution and parses the stream to create a linked list
 142  *              of device resources.
 143  *
 144  ******************************************************************************/
 145 
 146 ACPI_STATUS
 147 AcpiRsCreateResourceList (
 148     ACPI_OPERAND_OBJECT     *AmlBuffer,
 149     ACPI_BUFFER             *OutputBuffer)
 150 {
 151 
 152     ACPI_STATUS             Status;
 153     UINT8                   *AmlStart;
 154     ACPI_SIZE               ListSizeNeeded = 0;
 155     UINT32                  AmlBufferLength;
 156     void                    *Resource;
 157 
 158 
 159     ACPI_FUNCTION_TRACE (RsCreateResourceList);
 160 
 161 
 162     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlBuffer = %p\n",
 163         AmlBuffer));
 164 
 165     /* Params already validated, so we don't re-validate here */
 166 
 167     AmlBufferLength = AmlBuffer->Buffer.Length;
 168     AmlStart = AmlBuffer->Buffer.Pointer;
 169 
 170     /*
 171      * Pass the AmlBuffer into a module that can calculate
 172      * the buffer size needed for the linked list
 173      */
 174     Status = AcpiRsGetListLength (AmlStart, AmlBufferLength,
 175                 &ListSizeNeeded);
 176 
 177     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
 178         Status, (UINT32) ListSizeNeeded));
 179     if (ACPI_FAILURE (Status))
 180     {
 181         return_ACPI_STATUS (Status);
 182     }
 183 
 184     /* Validate/Allocate/Clear caller buffer */
 185 
 186     Status = AcpiUtInitializeBuffer (OutputBuffer, ListSizeNeeded);
 187     if (ACPI_FAILURE (Status))
 188     {
 189         return_ACPI_STATUS (Status);
 190     }
 191 
 192     /* Do the conversion */
 193 
 194     Resource = OutputBuffer->Pointer;
 195     Status = AcpiUtWalkAmlResources (NULL, AmlStart, AmlBufferLength,
 196                 AcpiRsConvertAmlToResources, &Resource);
 197     if (ACPI_FAILURE (Status))
 198     {
 199         return_ACPI_STATUS (Status);
 200     }
 201 
 202     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 203             OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 204     return_ACPI_STATUS (AE_OK);
 205 }
 206 
 207 
 208 /*******************************************************************************
 209  *
 210  * FUNCTION:    AcpiRsCreatePciRoutingTable
 211  *
 212  * PARAMETERS:  PackageObject           - Pointer to a package containing one
 213  *                                        of more ACPI_OPERAND_OBJECTs
 214  *              OutputBuffer            - Pointer to the user's buffer
 215  *
 216  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 217  *              If the OutputBuffer is too small, the error will be
 218  *              AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
 219  *              to the size buffer needed.
 220  *
 221  * DESCRIPTION: Takes the ACPI_OPERAND_OBJECT package and creates a
 222  *              linked list of PCI interrupt descriptions
 223  *
 224  * NOTE: It is the caller's responsibility to ensure that the start of the
 225  * output buffer is aligned properly (if necessary).
 226  *
 227  ******************************************************************************/
 228 
 229 ACPI_STATUS
 230 AcpiRsCreatePciRoutingTable (
 231     ACPI_OPERAND_OBJECT     *PackageObject,
 232     ACPI_BUFFER             *OutputBuffer)
 233 {
 234     UINT8                   *Buffer;
 235     ACPI_OPERAND_OBJECT     **TopObjectList;
 236     ACPI_OPERAND_OBJECT     **SubObjectList;
 237     ACPI_OPERAND_OBJECT     *ObjDesc;
 238     ACPI_SIZE               BufferSizeNeeded = 0;
 239     UINT32                  NumberOfElements;
 240     UINT32                  Index;
 241     ACPI_PCI_ROUTING_TABLE  *UserPrt;
 242     ACPI_NAMESPACE_NODE     *Node;
 243     ACPI_STATUS             Status;
 244     ACPI_BUFFER             PathBuffer;
 245 
 246 
 247     ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);
 248 
 249 
 250     /* Params already validated, so we don't re-validate here */
 251 
 252     /* Get the required buffer length */
 253 
 254     Status = AcpiRsGetPciRoutingTableLength (PackageObject,
 255                 &BufferSizeNeeded);
 256     if (ACPI_FAILURE (Status))
 257     {
 258         return_ACPI_STATUS (Status);
 259     }
 260 
 261     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
 262         (UINT32) BufferSizeNeeded));
 263 
 264     /* Validate/Allocate/Clear caller buffer */
 265 
 266     Status = AcpiUtInitializeBuffer (OutputBuffer, BufferSizeNeeded);
 267     if (ACPI_FAILURE (Status))
 268     {
 269         return_ACPI_STATUS (Status);
 270     }
 271 
 272     /*
 273      * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
 274      * package that in turn contains an UINT64 Address, a UINT8 Pin,
 275      * a Name, and a UINT8 SourceIndex.
 276      */
 277     TopObjectList    = PackageObject->Package.Elements;
 278     NumberOfElements = PackageObject->Package.Count;
 279     Buffer           = OutputBuffer->Pointer;
 280     UserPrt          = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
 281 
 282     for (Index = 0; Index < NumberOfElements; Index++)
 283     {
 284         /*
 285          * Point UserPrt past this current structure
 286          *
 287          * NOTE: On the first iteration, UserPrt->Length will
 288          * be zero because we cleared the return buffer earlier
 289          */
 290         Buffer += UserPrt->Length;
 291         UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
 292 
 293         /*
 294          * Fill in the Length field with the information we have at this point.
 295          * The minus four is to subtract the size of the UINT8 Source[4] member
 296          * because it is added below.
 297          */
 298         UserPrt->Length = (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
 299 
 300         /* Each sub-package must be of length 4 */
 301 
 302         if ((*TopObjectList)->Package.Count != 4)
 303         {
 304             ACPI_ERROR ((AE_INFO,
 305                 "(PRT[%u]) Need package of length 4, found length %u",
 306                 Index, (*TopObjectList)->Package.Count));
 307             return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
 308         }
 309 
 310         /*
 311          * Dereference the sub-package.
 312          * The SubObjectList will now point to an array of the four IRQ
 313          * elements: [Address, Pin, Source, SourceIndex]
 314          */
 315         SubObjectList = (*TopObjectList)->Package.Elements;
 316 
 317         /* 1) First subobject: Dereference the PRT.Address */
 318 
 319         ObjDesc = SubObjectList[0];
 320         if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 321         {
 322             ACPI_ERROR ((AE_INFO, "(PRT[%u].Address) Need Integer, found %s",
 323                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 324             return_ACPI_STATUS (AE_BAD_DATA);
 325         }
 326 
 327         UserPrt->Address = ObjDesc->Integer.Value;
 328 
 329         /* 2) Second subobject: Dereference the PRT.Pin */
 330 
 331         ObjDesc = SubObjectList[1];
 332         if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 333         {
 334             ACPI_ERROR ((AE_INFO, "(PRT[%u].Pin) Need Integer, found %s",
 335                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 336             return_ACPI_STATUS (AE_BAD_DATA);
 337         }
 338 
 339         UserPrt->Pin = (UINT32) ObjDesc->Integer.Value;
 340 
 341         /*
 342          * 3) Third subobject: Dereference the PRT.SourceName
 343          * The name may be unresolved (slack mode), so allow a null object
 344          */
 345         ObjDesc = SubObjectList[2];
 346         if (ObjDesc)
 347         {
 348             switch (ObjDesc->Common.Type)
 349             {
 350             case ACPI_TYPE_LOCAL_REFERENCE:
 351 
 352                 if (ObjDesc->Reference.Class != ACPI_REFCLASS_NAME)
 353                 {
 354                     ACPI_ERROR ((AE_INFO,
 355                         "(PRT[%u].Source) Need name, found Reference Class 0x%X",
 356                         Index, ObjDesc->Reference.Class));
 357                     return_ACPI_STATUS (AE_BAD_DATA);
 358                 }
 359 
 360                 Node = ObjDesc->Reference.Node;
 361 
 362                 /* Use *remaining* length of the buffer as max for pathname */
 363 
 364                 PathBuffer.Length = OutputBuffer->Length -
 365                                     (UINT32) ((UINT8 *) UserPrt->Source -
 366                                     (UINT8 *) OutputBuffer->Pointer);
 367                 PathBuffer.Pointer = UserPrt->Source;
 368 
 369                 Status = AcpiNsHandleToPathname ((ACPI_HANDLE) Node, &PathBuffer);
 370 
 371                 /* +1 to include null terminator */
 372 
 373                 UserPrt->Length += (UINT32) ACPI_STRLEN (UserPrt->Source) + 1;
 374                 break;
 375 
 376             case ACPI_TYPE_STRING:
 377 
 378                 ACPI_STRCPY (UserPrt->Source, ObjDesc->String.Pointer);
 379 
 380                 /*
 381                  * Add to the Length field the length of the string
 382                  * (add 1 for terminator)
 383                  */
 384                 UserPrt->Length += ObjDesc->String.Length + 1;
 385                 break;
 386 
 387             case ACPI_TYPE_INTEGER:
 388                 /*
 389                  * If this is a number, then the Source Name is NULL, since the
 390                  * entire buffer was zeroed out, we can leave this alone.
 391                  *
 392                  * Add to the Length field the length of the UINT32 NULL
 393                  */
 394                 UserPrt->Length += sizeof (UINT32);
 395                 break;
 396 
 397             default:
 398 
 399                ACPI_ERROR ((AE_INFO,
 400                    "(PRT[%u].Source) Need Ref/String/Integer, found %s",
 401                    Index, AcpiUtGetObjectTypeName (ObjDesc)));
 402                return_ACPI_STATUS (AE_BAD_DATA);
 403             }
 404         }
 405 
 406         /* Now align the current length */
 407 
 408         UserPrt->Length = (UINT32) ACPI_ROUND_UP_TO_64BIT (UserPrt->Length);
 409 
 410         /* 4) Fourth subobject: Dereference the PRT.SourceIndex */
 411 
 412         ObjDesc = SubObjectList[3];
 413         if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 414         {
 415             ACPI_ERROR ((AE_INFO,
 416                 "(PRT[%u].SourceIndex) Need Integer, found %s",
 417                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 418             return_ACPI_STATUS (AE_BAD_DATA);
 419         }
 420 
 421         UserPrt->SourceIndex = (UINT32) ObjDesc->Integer.Value;
 422 
 423         /* Point to the next ACPI_OPERAND_OBJECT in the top level package */
 424 
 425         TopObjectList++;
 426     }
 427 
 428     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 429             OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 430     return_ACPI_STATUS (AE_OK);
 431 }
 432 
 433 
 434 /*******************************************************************************
 435  *
 436  * FUNCTION:    AcpiRsCreateAmlResources
 437  *
 438  * PARAMETERS:  ResourceList            - Pointer to the resource list buffer
 439  *              OutputBuffer            - Where the AML buffer is returned
 440  *
 441  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 442  *              If the OutputBuffer is too small, the error will be
 443  *              AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
 444  *              to the size buffer needed.
 445  *
 446  * DESCRIPTION: Converts a list of device resources to an AML bytestream
 447  *              to be used as input for the _SRS control method.
 448  *
 449  ******************************************************************************/
 450 
 451 ACPI_STATUS
 452 AcpiRsCreateAmlResources (
 453     ACPI_BUFFER             *ResourceList,
 454     ACPI_BUFFER             *OutputBuffer)
 455 {
 456     ACPI_STATUS             Status;
 457     ACPI_SIZE               AmlSizeNeeded = 0;
 458 
 459 
 460     ACPI_FUNCTION_TRACE (RsCreateAmlResources);
 461 
 462 
 463     /* Params already validated, no need to re-validate here */
 464 
 465     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ResourceList Buffer = %p\n",
 466         ResourceList->Pointer));
 467 
 468     /* Get the buffer size needed for the AML byte stream */
 469 
 470     Status = AcpiRsGetAmlLength (ResourceList->Pointer,
 471                 ResourceList->Length, &AmlSizeNeeded);
 472 
 473     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
 474         (UINT32) AmlSizeNeeded, AcpiFormatException (Status)));
 475     if (ACPI_FAILURE (Status))
 476     {
 477         return_ACPI_STATUS (Status);
 478     }
 479 
 480     /* Validate/Allocate/Clear caller buffer */
 481 
 482     Status = AcpiUtInitializeBuffer (OutputBuffer, AmlSizeNeeded);
 483     if (ACPI_FAILURE (Status))
 484     {
 485         return_ACPI_STATUS (Status);
 486     }
 487 
 488     /* Do the conversion */
 489 
 490     Status = AcpiRsConvertResourcesToAml (ResourceList->Pointer,
 491                 AmlSizeNeeded, OutputBuffer->Pointer);
 492     if (ACPI_FAILURE (Status))
 493     {
 494         return_ACPI_STATUS (Status);
 495     }
 496 
 497     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 498         OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 499     return_ACPI_STATUS (AE_OK);
 500 }