components/resources/rscreate.c

/*******************************************************************************
 *
 * Module Name: rscreate - Create resource lists/tables
 *              $Revision: 38 $
 *
 ******************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp.
 * All rights reserved.
 *
 * 2. License
 *
 * 2.1. This is your license from Intel Corp. under its intellectual property
 * rights.  You may have additional license terms from the party that provided
 * you this software, covering your right to use that party's intellectual
 * property rights.
 *
 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
 * copy of the source code appearing in this file ("Covered Code") an
 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
 * base code distributed originally by Intel ("Original Intel Code") to copy,
 * make derivatives, distribute, use and display any portion of the Covered
 * Code in any form, with the right to sublicense such rights; and
 *
 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
 * license (with the right to sublicense), under only those claims of Intel
 * patents that are infringed by the Original Intel Code, to make, use, sell,
 * offer to sell, and import the Covered Code and derivative works thereof
 * solely to the minimum extent necessary to exercise the above copyright
 * license, and in no event shall the patent license extend to any additions
 * to or modifications of the Original Intel Code.  No other license or right
 * is granted directly or by implication, estoppel or otherwise;
 *
 * The above copyright and patent license is granted only if the following
 * conditions are met:
 *
 * 3. Conditions
 *
 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification with rights to further distribute source must include
 * the above Copyright Notice, the above License, this list of Conditions,
 * and the following Disclaimer and Export Compliance provision.  In addition,
 * Licensee must cause all Covered Code to which Licensee contributes to
 * contain a file documenting the changes Licensee made to create that Covered
 * Code and the date of any change.  Licensee must include in that file the
 * documentation of any changes made by any predecessor Licensee.  Licensee
 * must include a prominent statement that the modification is derived,
 * directly or indirectly, from Original Intel Code.
 *
 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification without rights to further distribute source must
 * include the following Disclaimer and Export Compliance provision in the
 * documentation and/or other materials provided with distribution.  In
 * addition, Licensee may not authorize further sublicense of source of any
 * portion of the Covered Code, and must include terms to the effect that the
 * license from Licensee to its licensee is limited to the intellectual
 * property embodied in the software Licensee provides to its licensee, and
 * not to intellectual property embodied in modifications its licensee may
 * make.
 *
 * 3.3. Redistribution of Executable. Redistribution in executable form of any
 * substantial portion of the Covered Code or modification must reproduce the
 * above Copyright Notice, and the following Disclaimer and Export Compliance
 * provision in the documentation and/or other materials provided with the
 * distribution.
 *
 * 3.4. Intel retains all right, title, and interest in and to the Original
 * Intel Code.
 *
 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
 * Intel shall be used in advertising or otherwise to promote the sale, use or
 * other dealings in products derived from or relating to the Covered Code
 * without prior written authorization from Intel.
 *
 * 4. Disclaimer and Export Compliance
 *
 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
 * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
 * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
 * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
 * PARTICULAR PURPOSE.
 *
 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
 * LIMITED REMEDY.
 *
 * 4.3. Licensee shall not export, either directly or indirectly, any of this
 * software or system incorporating such software without first obtaining any
 * required license or other approval from the U. S. Department of Commerce or
 * any other agency or department of the United States Government.  In the
 * event Licensee exports any such software from the United States or
 * re-exports any such software from a foreign destination, Licensee shall
 * ensure that the distribution and export/re-export of the software is in
 * compliance with all laws, regulations, orders, or other restrictions of the
 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 * any of its subsidiaries will export/re-export any technical data, process,
 * software, or service, directly or indirectly, to any country for which the
 * United States government or any agency thereof requires an export license,
 * other governmental approval, or letter of assurance, without first obtaining
 * such license, approval or letter.
 *
 *****************************************************************************/


#define __RSCREATE_C__

#include "acpi.h"
#include "acresrc.h"
#include "amlcode.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_RESOURCES
        MODULE_NAME         ("rscreate")


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsCreateResourceList
 *
 * PARAMETERS:  ByteStreamBuffer        - Pointer to the resource byte stream
 *              OutputBuffer            - Pointer to the user's buffer
 *              OutputBufferLength      - Pointer to the size of OutputBuffer
 *
 * RETURN:      Status  - AE_OK if okay, else a valid ACPI_STATUS code
 *              If OutputBuffer is not large enough, OutputBufferLength
 *              indicates how large OutputBuffer should be, else it
 *              indicates how may UINT8 elements of OutputBuffer are valid.
 *
 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
 *              execution and parses the stream to create a linked list
 *              of device resources.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsCreateResourceList (
    ACPI_OPERAND_OBJECT     *ByteStreamBuffer,
    UINT8                   *OutputBuffer,
    UINT32                  *OutputBufferLength)
{

    ACPI_STATUS             Status;
    UINT8                   *ByteStreamStart;
    UINT32                  ListSizeNeeded = 0;
    UINT32                  ByteStreamBufferLength;


    FUNCTION_TRACE ("RsCreateResourceList");


    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ByteStreamBuffer = %p\n", ByteStreamBuffer));

    /*
     * Params already validated, so we don't re-validate here
     */
    ByteStreamBufferLength = ByteStreamBuffer->Buffer.Length;
    ByteStreamStart = ByteStreamBuffer->Buffer.Pointer;

    /*
     * Pass the ByteStreamBuffer into a module that can calculate
     * the buffer size needed for the linked list
     */
    Status = AcpiRsCalculateListLength (ByteStreamStart, ByteStreamBufferLength,
                &ListSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
        Status, ListSizeNeeded));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Is caller buffer large enough?
     */
    if (ListSizeNeeded > *OutputBufferLength)
    {
        *OutputBufferLength = ListSizeNeeded;
        return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
    }

    /*
     * Zero out the return buffer before proceeding
     */
    MEMSET (OutputBuffer, 0x00, *OutputBufferLength);

    Status = AcpiRsByteStreamToList (ByteStreamStart, ByteStreamBufferLength,
                &OutputBuffer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer = %p\n", OutputBuffer));
    *OutputBufferLength = ListSizeNeeded;
    return_ACPI_STATUS (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsCreatePciRoutingTable
 *
 * PARAMETERS:  PackageObject           - Pointer to an ACPI_OPERAND_OBJECT
 *                                        package
 *              OutputBuffer            - Pointer to the user's buffer
 *              OutputBufferLength      - Size of OutputBuffer
 *
 * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 *              If the OutputBuffer is too small, the error will be
 *              AE_BUFFER_OVERFLOW and OutputBufferLength will point
 *              to the size buffer needed.
 *
 * DESCRIPTION: Takes the ACPI_OPERAND_OBJECT  package and creates a
 *              linked list of PCI interrupt descriptions
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsCreatePciRoutingTable (
    ACPI_OPERAND_OBJECT     *PackageObject,
    UINT8                   *OutputBuffer,
    UINT32                  *OutputBufferLength)
{
    UINT8                   *Buffer = OutputBuffer;
    ACPI_OPERAND_OBJECT     **TopObjectList = NULL;
    ACPI_OPERAND_OBJECT     **SubObjectList = NULL;
    ACPI_OPERAND_OBJECT     *PackageElement = NULL;
    UINT32                  BufferSizeNeeded = 0;
    UINT32                  NumberOfElements = 0;
    UINT32                  Index = 0;
    PCI_ROUTING_TABLE       *UserPrt = NULL;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_STATUS             Status;


    FUNCTION_TRACE ("RsCreatePciRoutingTable");


    /*
     * Params already validated, so we don't re-validate here
     */
    Status = AcpiRsCalculatePciRoutingTableLength (PackageObject,
                &BufferSizeNeeded);
    if (!ACPI_SUCCESS(Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n", BufferSizeNeeded));

    /* Is caller buffer large enough? */

    if (BufferSizeNeeded > *OutputBufferLength)
    {
        return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
    }
    *OutputBufferLength = BufferSizeNeeded;

    /*
     * Zero out the return buffer before proceeding
     */
    MEMSET (OutputBuffer, 0x00, *OutputBufferLength);

    /*
     * Loop through the ACPI_INTERNAL_OBJECTS - Each object should
     * contain a UINT32 Address, a UINT8 Pin, a Name and a UINT8
     * SourceIndex.
     */
    TopObjectList    = PackageObject->Package.Elements;
    NumberOfElements = PackageObject->Package.Count;
    UserPrt          = (PCI_ROUTING_TABLE *) Buffer;


    Buffer = ROUND_PTR_UP_TO_8 (Buffer, UINT8);

    for (Index = 0; Index < NumberOfElements; Index++)
    {
        /*
         * Point UserPrt past this current structure
         *
         * NOTE: On the first iteration, UserPrt->Length will
         * be zero because we cleared the return buffer earlier
         */
        Buffer += UserPrt->Length;
        UserPrt = (PCI_ROUTING_TABLE *) Buffer;

        /*
         * Fill in the Length field with the information we
         * have at this point.
         * The minus four is to subtract the size of the
         * UINT8 Source[4] member because it is added below.
         */
        UserPrt->Length = (sizeof (PCI_ROUTING_TABLE) -4);

        /*
         * Dereference the sub-package
         */
        PackageElement = *TopObjectList;

        /*
         * The SubObjectList will now point to an array of
         * the four IRQ elements: Address, Pin, Source and
         * SourceIndex
         */
        SubObjectList = PackageElement->Package.Elements;

        /*
         * 1) First subobject:  Dereference the Address
         */
        if (ACPI_TYPE_INTEGER == (*SubObjectList)->Common.Type)
        {
            UserPrt->Address = (*SubObjectList)->Integer.Value;
        }
        else
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
                AcpiUtGetTypeName ((*SubObjectList)->Common.Type)));
            return_ACPI_STATUS (AE_BAD_DATA);
        }

        /*
         * 2) Second subobject: Dereference the Pin
         */
        SubObjectList++;

        if (ACPI_TYPE_INTEGER == (*SubObjectList)->Common.Type)
        {
            UserPrt->Pin = (UINT32) (*SubObjectList)->Integer.Value;
        }
        else
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
                AcpiUtGetTypeName ((*SubObjectList)->Common.Type)));
            return_ACPI_STATUS (AE_BAD_DATA);
        }

        /*
         * 3) Third subobject: Dereference the Source Name
         */
        SubObjectList++;

        switch ((*SubObjectList)->Common.Type)
        {
        case INTERNAL_TYPE_REFERENCE:

            if ((*SubObjectList)->Reference.Opcode != AML_INT_NAMEPATH_OP)
            {
               ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need name, found reference op %X\n",
                    (*SubObjectList)->Reference.Opcode));
                return_ACPI_STATUS (AE_BAD_DATA);
            }

            Node = (*SubObjectList)->Reference.Node;

            /* Use *remaining* length of the buffer as max for pathname */

            BufferSizeNeeded = *OutputBufferLength -
                                (UINT32) ((UINT8 *) UserPrt->Source - OutputBuffer);

            Status = AcpiNsHandleToPathname ((ACPI_HANDLE *) Node,
                        &BufferSizeNeeded, UserPrt->Source);

            UserPrt->Length += STRLEN (UserPrt->Source) + 1; /* include null terminator */
            break;


        case ACPI_TYPE_STRING:

            STRCPY (UserPrt->Source,
                  (*SubObjectList)->String.Pointer);

            /*
             * Add to the Length field the length of the string
             */
            UserPrt->Length += (*SubObjectList)->String.Length;
            break;


        case ACPI_TYPE_INTEGER:
            /*
             * If this is a number, then the Source Name
             * is NULL, since the entire buffer was zeroed
             * out, we can leave this alone.
             */
            /*
             * Add to the Length field the length of
             * the UINT32 NULL
             */
            UserPrt->Length += sizeof (UINT32);
            break;


        default:

           ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
                AcpiUtGetTypeName ((*SubObjectList)->Common.Type)));
           return_ACPI_STATUS (AE_BAD_DATA);
           break;
        }

        /* Now align the current length */

        UserPrt->Length = ROUND_UP_TO_64BITS (UserPrt->Length);

        /*
         * 4) Fourth subobject: Dereference the Source Index
         */
        SubObjectList++;

        if (ACPI_TYPE_INTEGER == (*SubObjectList)->Common.Type)
        {
            UserPrt->SourceIndex = (UINT32) (*SubObjectList)->Integer.Value;
        }
        else
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
                AcpiUtGetTypeName ((*SubObjectList)->Common.Type)));
            return_ACPI_STATUS (AE_BAD_DATA);
        }

        /*
         * Point to the next ACPI_OPERAND_OBJECT
         */
        TopObjectList++;
    }

    /*
     * Report the amount of buffer used
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer = %p\n", OutputBuffer));
    return_ACPI_STATUS (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsCreateByteStream
 *
 * PARAMETERS:  LinkedListBuffer        - Pointer to the resource linked list
 *              OutputBuffer            - Pointer to the user's buffer
 *              OutputBufferLength      - Size of OutputBuffer
 *
 * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 *              If the OutputBuffer is too small, the error will be
 *              AE_BUFFER_OVERFLOW and OutputBufferLength will point
 *              to the size buffer needed.
 *
 * DESCRIPTION: Takes the linked list of device resources and
 *              creates a bytestream to be used as input for the
 *              _SRS control method.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsCreateByteStream (
    ACPI_RESOURCE           *LinkedListBuffer,
    UINT8                   *OutputBuffer,
    UINT32                  *OutputBufferLength)
{
    ACPI_STATUS             Status;
    UINT32                  ByteStreamSizeNeeded = 0;


    FUNCTION_TRACE ("RsCreateByteStream");


    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "LinkedListBuffer = %p\n", LinkedListBuffer));

    /*
     * Params already validated, so we don't re-validate here
     *
     * Pass the LinkedListBuffer into a module that calculates
     * the buffer size needed for the byte stream.
     */
    Status = AcpiRsCalculateByteStreamLength (LinkedListBuffer,
                &ByteStreamSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ByteStreamSizeNeeded=%X, %s\n",
        ByteStreamSizeNeeded, AcpiFormatException (Status)));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Is caller buffer large enough?
     */
    if (ByteStreamSizeNeeded > *OutputBufferLength)
    {
        *OutputBufferLength = ByteStreamSizeNeeded;
        return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
    }

    /*
     * Zero out the return buffer before proceeding
     */
    MEMSET (OutputBuffer, 0x00, *OutputBufferLength);

    Status = AcpiRsListToByteStream (LinkedListBuffer, ByteStreamSizeNeeded,
                &OutputBuffer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer = %p\n", OutputBuffer));
    return_ACPI_STATUS (AE_OK);
}