drivers/bus/acpi/acpica/resources/rscreate.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rscreate - Create resource lists/tables
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2019, 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 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acresrc.h"
  47 #include "acnamesp.h"
  48
  49 #define _COMPONENT          ACPI_RESOURCES
  50         ACPI_MODULE_NAME    ("rscreate")
  51
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    AcpiBufferToResource
  56  *
  57  * PARAMETERS:  AmlBuffer           - Pointer to the resource byte stream
  58  *              AmlBufferLength     - Length of the AmlBuffer
  59  *              ResourcePtr         - Where the converted resource is returned
  60  *
  61  * RETURN:      Status
  62  *
  63  * DESCRIPTION: Convert a raw AML buffer to a resource list
  64  *
  65  ******************************************************************************/
  66
  67 ACPI_STATUS
  68 AcpiBufferToResource (
  69     UINT8                   *AmlBuffer,
  70     UINT16                  AmlBufferLength,
  71     ACPI_RESOURCE           **ResourcePtr)
  72 {
  73     ACPI_STATUS             Status;
  74     ACPI_SIZE               ListSizeNeeded;
  75     void                    *Resource;
  76     void                    *CurrentResourcePtr;
  77
  78
  79     ACPI_FUNCTION_TRACE (AcpiBufferToResource);
  80
  81
  82     /*
  83      * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
  84      * is not required here.
  85      */
  86
  87     /* Get the required length for the converted resource */
  88
  89     Status = AcpiRsGetListLength (
  90         AmlBuffer, AmlBufferLength, &ListSizeNeeded);
  91     if (Status == AE_AML_NO_RESOURCE_END_TAG)
  92     {
  93         Status = AE_OK;
  94     }
  95     if (ACPI_FAILURE (Status))
  96     {
  97         return_ACPI_STATUS (Status);
  98     }
  99
 100     /* Allocate a buffer for the converted resource */
 101
 102     Resource = ACPI_ALLOCATE_ZEROED (ListSizeNeeded);
 103     CurrentResourcePtr = Resource;
 104     if (!Resource)
 105     {
 106         return_ACPI_STATUS (AE_NO_MEMORY);
 107     }
 108
 109     /* Perform the AML-to-Resource conversion */
 110
 111     Status = AcpiUtWalkAmlResources (NULL, AmlBuffer, AmlBufferLength,
 112         AcpiRsConvertAmlToResources, &CurrentResourcePtr);
 113     if (Status == AE_AML_NO_RESOURCE_END_TAG)
 114     {
 115         Status = AE_OK;
 116     }
 117     if (ACPI_FAILURE (Status))
 118     {
 119         ACPI_FREE (Resource);
 120     }
 121     else
 122     {
 123         *ResourcePtr = Resource;
 124     }
 125
 126     return_ACPI_STATUS (Status);
 127 }
 128
 129 ACPI_EXPORT_SYMBOL (AcpiBufferToResource)
 130
 131
 132 /*******************************************************************************
 133  *
 134  * FUNCTION:    AcpiRsCreateResourceList
 135  *
 136  * PARAMETERS:  AmlBuffer           - Pointer to the resource byte stream
 137  *              OutputBuffer        - Pointer to the user's buffer
 138  *
 139  * RETURN:      Status: AE_OK if okay, else a valid ACPI_STATUS code
 140  *              If OutputBuffer is not large enough, OutputBufferLength
 141  *              indicates how large OutputBuffer should be, else it
 142  *              indicates how may UINT8 elements of OutputBuffer are valid.
 143  *
 144  * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
 145  *              execution and parses the stream to create a linked list
 146  *              of device resources.
 147  *
 148  ******************************************************************************/
 149
 150 ACPI_STATUS
 151 AcpiRsCreateResourceList (
 152     ACPI_OPERAND_OBJECT     *AmlBuffer,
 153     ACPI_BUFFER             *OutputBuffer)
 154 {
 155
 156     ACPI_STATUS             Status;
 157     UINT8                   *AmlStart;
 158     ACPI_SIZE               ListSizeNeeded = 0;
 159     UINT32                  AmlBufferLength;
 160     void                    *Resource;
 161
 162
 163     ACPI_FUNCTION_TRACE (RsCreateResourceList);
 164
 165
 166     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlBuffer = %p\n",
 167         AmlBuffer));
 168
 169     /* Params already validated, so we don't re-validate here */
 170
 171     AmlBufferLength = AmlBuffer->Buffer.Length;
 172     AmlStart = AmlBuffer->Buffer.Pointer;
 173
 174     /*
 175      * Pass the AmlBuffer into a module that can calculate
 176      * the buffer size needed for the linked list
 177      */
 178     Status = AcpiRsGetListLength (AmlStart, AmlBufferLength,
 179                 &ListSizeNeeded);
 180
 181     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
 182         Status, (UINT32) ListSizeNeeded));
 183     if (ACPI_FAILURE (Status))
 184     {
 185         return_ACPI_STATUS (Status);
 186     }
 187
 188     /* Validate/Allocate/Clear caller buffer */
 189
 190     Status = AcpiUtInitializeBuffer (OutputBuffer, ListSizeNeeded);
 191     if (ACPI_FAILURE (Status))
 192     {
 193         return_ACPI_STATUS (Status);
 194     }
 195
 196     /* Do the conversion */
 197
 198     Resource = OutputBuffer->Pointer;
 199     Status = AcpiUtWalkAmlResources (NULL, AmlStart, AmlBufferLength,
 200         AcpiRsConvertAmlToResources, &Resource);
 201     if (ACPI_FAILURE (Status))
 202     {
 203         return_ACPI_STATUS (Status);
 204     }
 205
 206     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 207         OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 208     return_ACPI_STATUS (AE_OK);
 209 }
 210
 211
 212 /*******************************************************************************
 213  *
 214  * FUNCTION:    AcpiRsCreatePciRoutingTable
 215  *
 216  * PARAMETERS:  PackageObject           - Pointer to a package containing one
 217  *                                        of more ACPI_OPERAND_OBJECTs
 218  *              OutputBuffer            - Pointer to the user's buffer
 219  *
 220  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 221  *              If the OutputBuffer is too small, the error will be
 222  *              AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
 223  *              to the size buffer needed.
 224  *
 225  * DESCRIPTION: Takes the ACPI_OPERAND_OBJECT package and creates a
 226  *              linked list of PCI interrupt descriptions
 227  *
 228  * NOTE: It is the caller's responsibility to ensure that the start of the
 229  * output buffer is aligned properly (if necessary).
 230  *
 231  ******************************************************************************/
 232
 233 ACPI_STATUS
 234 AcpiRsCreatePciRoutingTable (
 235     ACPI_OPERAND_OBJECT     *PackageObject,
 236     ACPI_BUFFER             *OutputBuffer)
 237 {
 238     UINT8                   *Buffer;
 239     ACPI_OPERAND_OBJECT     **TopObjectList;
 240     ACPI_OPERAND_OBJECT     **SubObjectList;
 241     ACPI_OPERAND_OBJECT     *ObjDesc;
 242     ACPI_SIZE               BufferSizeNeeded = 0;
 243     UINT32                  NumberOfElements;
 244     UINT32                  Index;
 245     ACPI_PCI_ROUTING_TABLE  *UserPrt;
 246     ACPI_NAMESPACE_NODE     *Node;
 247     ACPI_STATUS             Status;
 248     ACPI_BUFFER             PathBuffer;
 249
 250
 251     ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);
 252
 253
 254     /* Params already validated, so we don't re-validate here */
 255
 256     /* Get the required buffer length */
 257
 258     Status = AcpiRsGetPciRoutingTableLength (
 259         PackageObject,&BufferSizeNeeded);
 260     if (ACPI_FAILURE (Status))
 261     {
 262         return_ACPI_STATUS (Status);
 263     }
 264
 265     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
 266         (UINT32) BufferSizeNeeded));
 267
 268     /* Validate/Allocate/Clear caller buffer */
 269
 270     Status = AcpiUtInitializeBuffer (OutputBuffer, BufferSizeNeeded);
 271     if (ACPI_FAILURE (Status))
 272     {
 273         return_ACPI_STATUS (Status);
 274     }
 275
 276     /*
 277      * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
 278      * package that in turn contains an UINT64 Address, a UINT8 Pin,
 279      * a Name, and a UINT8 SourceIndex.
 280      */
 281     TopObjectList = PackageObject->Package.Elements;
 282     NumberOfElements = PackageObject->Package.Count;
 283     Buffer = OutputBuffer->Pointer;
 284     UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
 285
 286     for (Index = 0; Index < NumberOfElements; Index++)
 287     {
 288         /*
 289          * Point UserPrt past this current structure
 290          *
 291          * NOTE: On the first iteration, UserPrt->Length will
 292          * be zero because we cleared the return buffer earlier
 293          */
 294         Buffer += UserPrt->Length;
 295         UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
 296
 297         /*
 298          * Fill in the Length field with the information we have at this
 299          * point. The minus four is to subtract the size of the UINT8
 300          * Source[4] member because it is added below.
 301          */
 302         UserPrt->Length = (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
 303
 304         /* Each subpackage must be of length 4 */
 305
 306         if ((*TopObjectList)->Package.Count != 4)
 307         {
 308             ACPI_ERROR ((AE_INFO,
 309                 "(PRT[%u]) Need package of length 4, found length %u",
 310                 Index, (*TopObjectList)->Package.Count));
 311             return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
 312         }
 313
 314         /*
 315          * Dereference the subpackage.
 316          * The SubObjectList will now point to an array of the four IRQ
 317          * elements: [Address, Pin, Source, SourceIndex]
 318          */
 319         SubObjectList = (*TopObjectList)->Package.Elements;
 320
 321         /* 1) First subobject: Dereference the PRT.Address */
 322
 323         ObjDesc = SubObjectList[0];
 324         if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 325         {
 326             ACPI_ERROR ((AE_INFO,
 327                 "(PRT[%u].Address) Need Integer, found %s",
 328                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 329             return_ACPI_STATUS (AE_BAD_DATA);
 330         }
 331
 332         UserPrt->Address = ObjDesc->Integer.Value;
 333
 334         /* 2) Second subobject: Dereference the PRT.Pin */
 335
 336         ObjDesc = SubObjectList[1];
 337         if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 338         {
 339             ACPI_ERROR ((AE_INFO, "(PRT[%u].Pin) Need Integer, found %s",
 340                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 341             return_ACPI_STATUS (AE_BAD_DATA);
 342         }
 343
 344         UserPrt->Pin = (UINT32) ObjDesc->Integer.Value;
 345
 346         /*
 347          * 3) Third subobject: Dereference the PRT.SourceName
 348          * The name may be unresolved (slack mode), so allow a null object
 349          */
 350         ObjDesc = SubObjectList[2];
 351         if (ObjDesc)
 352         {
 353             switch (ObjDesc->Common.Type)
 354             {
 355             case ACPI_TYPE_LOCAL_REFERENCE:
 356
 357                 if (ObjDesc->Reference.Class != ACPI_REFCLASS_NAME)
 358                 {
 359                     ACPI_ERROR ((AE_INFO,
 360                         "(PRT[%u].Source) Need name, found Reference Class 0x%X",
 361                         Index, ObjDesc->Reference.Class));
 362                     return_ACPI_STATUS (AE_BAD_DATA);
 363                 }
 364
 365                 Node = ObjDesc->Reference.Node;
 366
 367                 /* Use *remaining* length of the buffer as max for pathname */
 368
 369                 PathBuffer.Length = OutputBuffer->Length -
 370                     (UINT32) ((UINT8 *) UserPrt->Source -
 371                     (UINT8 *) OutputBuffer->Pointer);
 372                 PathBuffer.Pointer = UserPrt->Source;
 373
 374                 Status = AcpiNsHandleToPathname (
 375                     (ACPI_HANDLE) Node, &PathBuffer, FALSE);
 376                 if (ACPI_FAILURE (Status))
 377                 {
 378                     return_ACPI_STATUS (Status);
 379                 }
 380
 381                 /* +1 to include null terminator */
 382
 383                 UserPrt->Length += (UINT32) strlen (UserPrt->Source) + 1;
 384                 break;
 385
 386             case ACPI_TYPE_STRING:
 387
 388                 strcpy (UserPrt->Source, ObjDesc->String.Pointer);
 389
 390                 /*
 391                  * Add to the Length field the length of the string
 392                  * (add 1 for terminator)
 393                  */
 394                 UserPrt->Length += ObjDesc->String.Length + 1;
 395                 break;
 396
 397             case ACPI_TYPE_INTEGER:
 398                 /*
 399                  * If this is a number, then the Source Name is NULL, since
 400                  * the entire buffer was zeroed out, we can leave this alone.
 401                  *
 402                  * Add to the Length field the length of the UINT32 NULL
 403                  */
 404                 UserPrt->Length += sizeof (UINT32);
 405                 break;
 406
 407             default:
 408
 409                ACPI_ERROR ((AE_INFO,
 410                    "(PRT[%u].Source) Need Ref/String/Integer, found %s",
 411                    Index, AcpiUtGetObjectTypeName (ObjDesc)));
 412                return_ACPI_STATUS (AE_BAD_DATA);
 413             }
 414         }
 415
 416         /* Now align the current length */
 417
 418         UserPrt->Length = (UINT32) ACPI_ROUND_UP_TO_64BIT (UserPrt->Length);
 419
 420         /* 4) Fourth subobject: Dereference the PRT.SourceIndex */
 421
 422         ObjDesc = SubObjectList[3];
 423         if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 424         {
 425             ACPI_ERROR ((AE_INFO,
 426                 "(PRT[%u].SourceIndex) Need Integer, found %s",
 427                 Index, AcpiUtGetObjectTypeName (ObjDesc)));
 428             return_ACPI_STATUS (AE_BAD_DATA);
 429         }
 430
 431         UserPrt->SourceIndex = (UINT32) ObjDesc->Integer.Value;
 432
 433         /* Point to the next ACPI_OPERAND_OBJECT in the top level package */
 434
 435         TopObjectList++;
 436     }
 437
 438     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 439         OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 440     return_ACPI_STATUS (AE_OK);
 441 }
 442
 443
 444 /*******************************************************************************
 445  *
 446  * FUNCTION:    AcpiRsCreateAmlResources
 447  *
 448  * PARAMETERS:  ResourceList            - Pointer to the resource list buffer
 449  *              OutputBuffer            - Where the AML buffer is returned
 450  *
 451  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 452  *              If the OutputBuffer is too small, the error will be
 453  *              AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
 454  *              to the size buffer needed.
 455  *
 456  * DESCRIPTION: Converts a list of device resources to an AML bytestream
 457  *              to be used as input for the _SRS control method.
 458  *
 459  ******************************************************************************/
 460
 461 ACPI_STATUS
 462 AcpiRsCreateAmlResources (
 463     ACPI_BUFFER             *ResourceList,
 464     ACPI_BUFFER             *OutputBuffer)
 465 {
 466     ACPI_STATUS             Status;
 467     ACPI_SIZE               AmlSizeNeeded = 0;
 468
 469
 470     ACPI_FUNCTION_TRACE (RsCreateAmlResources);
 471
 472
 473     /* Params already validated, no need to re-validate here */
 474
 475     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ResourceList Buffer = %p\n",
 476         ResourceList->Pointer));
 477
 478     /* Get the buffer size needed for the AML byte stream */
 479
 480     Status = AcpiRsGetAmlLength (
 481         ResourceList->Pointer, ResourceList->Length, &AmlSizeNeeded);
 482
 483     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
 484         (UINT32) AmlSizeNeeded, AcpiFormatException (Status)));
 485     if (ACPI_FAILURE (Status))
 486     {
 487         return_ACPI_STATUS (Status);
 488     }
 489
 490     /* Validate/Allocate/Clear caller buffer */
 491
 492     Status = AcpiUtInitializeBuffer (OutputBuffer, AmlSizeNeeded);
 493     if (ACPI_FAILURE (Status))
 494     {
 495         return_ACPI_STATUS (Status);
 496     }
 497
 498     /* Do the conversion */
 499
 500     Status = AcpiRsConvertResourcesToAml (ResourceList->Pointer,
 501         AmlSizeNeeded, OutputBuffer->Pointer);
 502     if (ACPI_FAILURE (Status))
 503     {
 504         return_ACPI_STATUS (Status);
 505     }
 506
 507     ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
 508         OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
 509     return_ACPI_STATUS (AE_OK);
 510 }