reactos/drivers/bus/acpi/acpica/resources/rslist.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rslist - Linked list utilities
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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
  48 #define _COMPONENT          ACPI_RESOURCES
  49         ACPI_MODULE_NAME    ("rslist")
  50
  51
  52 /*******************************************************************************
  53  *
  54  * FUNCTION:    AcpiRsConvertAmlToResources
  55  *
  56  * PARAMETERS:  ACPI_WALK_AML_CALLBACK
  57  *              ResourcePtr             - Pointer to the buffer that will
  58  *                                        contain the output structures
  59  *
  60  * RETURN:      Status
  61  *
  62  * DESCRIPTION: Convert an AML resource to an internal representation of the
  63  *              resource that is aligned and easier to access.
  64  *
  65  ******************************************************************************/
  66
  67 ACPI_STATUS
  68 AcpiRsConvertAmlToResources (
  69     UINT8                   *Aml,
  70     UINT32                  Length,
  71     UINT32                  Offset,
  72     UINT8                   ResourceIndex,
  73     void                    **Context)
  74 {
  75     ACPI_RESOURCE           **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
  76                                 ACPI_RESOURCE, Context);
  77     ACPI_RESOURCE           *Resource;
  78     AML_RESOURCE            *AmlResource;
  79     ACPI_RSCONVERT_INFO     *ConversionTable;
  80     ACPI_STATUS             Status;
  81
  82
  83     ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
  84
  85
  86     /*
  87      * Check that the input buffer and all subsequent pointers into it
  88      * are aligned on a native word boundary. Most important on IA64
  89      */
  90     Resource = *ResourcePtr;
  91     if (ACPI_IS_MISALIGNED (Resource))
  92     {
  93         ACPI_WARNING ((AE_INFO,
  94             "Misaligned resource pointer %p", Resource));
  95     }
  96
  97     /* Get the appropriate conversion info table */
  98
  99     AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
 100
 101     if (AcpiUtGetResourceType (Aml) ==
 102         ACPI_RESOURCE_NAME_SERIAL_BUS)
 103     {
 104         if (AmlResource->CommonSerialBus.Type >
 105             AML_RESOURCE_MAX_SERIALBUSTYPE)
 106         {
 107             ConversionTable = NULL;
 108         }
 109         else
 110         {
 111             /* This is an I2C, SPI, or UART SerialBus descriptor */
 112
 113             ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch [
 114                 AmlResource->CommonSerialBus.Type];
 115         }
 116     }
 117     else
 118     {
 119         ConversionTable = AcpiGbl_GetResourceDispatch[ResourceIndex];
 120     }
 121
 122     if (!ConversionTable)
 123     {
 124         ACPI_ERROR ((AE_INFO,
 125             "Invalid/unsupported resource descriptor: Type 0x%2.2X",
 126             ResourceIndex));
 127         return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
 128     }
 129
 130      /* Convert the AML byte stream resource to a local resource struct */
 131
 132     Status = AcpiRsConvertAmlToResource (
 133         Resource, AmlResource, ConversionTable);
 134     if (ACPI_FAILURE (Status))
 135     {
 136         ACPI_EXCEPTION ((AE_INFO, Status,
 137             "Could not convert AML resource (Type 0x%X)", *Aml));
 138         return_ACPI_STATUS (Status);
 139     }
 140
 141     ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
 142         "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
 143         AcpiUtGetResourceType (Aml), Length,
 144         Resource->Length));
 145
 146     /* Point to the next structure in the output buffer */
 147
 148     *ResourcePtr = ACPI_NEXT_RESOURCE (Resource);
 149     return_ACPI_STATUS (AE_OK);
 150 }
 151
 152
 153 /*******************************************************************************
 154  *
 155  * FUNCTION:    AcpiRsConvertResourcesToAml
 156  *
 157  * PARAMETERS:  Resource            - Pointer to the resource linked list
 158  *              AmlSizeNeeded       - Calculated size of the byte stream
 159  *                                    needed from calling AcpiRsGetAmlLength()
 160  *                                    The size of the OutputBuffer is
 161  *                                    guaranteed to be >= AmlSizeNeeded
 162  *              OutputBuffer        - Pointer to the buffer that will
 163  *                                    contain the byte stream
 164  *
 165  * RETURN:      Status
 166  *
 167  * DESCRIPTION: Takes the resource linked list and parses it, creating a
 168  *              byte stream of resources in the caller's output buffer
 169  *
 170  ******************************************************************************/
 171
 172 ACPI_STATUS
 173 AcpiRsConvertResourcesToAml (
 174     ACPI_RESOURCE           *Resource,
 175     ACPI_SIZE               AmlSizeNeeded,
 176     UINT8                   *OutputBuffer)
 177 {
 178     UINT8                   *Aml = OutputBuffer;
 179     UINT8                   *EndAml = OutputBuffer + AmlSizeNeeded;
 180     ACPI_RSCONVERT_INFO     *ConversionTable;
 181     ACPI_STATUS             Status;
 182
 183
 184     ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
 185
 186
 187     /* Walk the resource descriptor list, convert each descriptor */
 188
 189     while (Aml < EndAml)
 190     {
 191         /* Validate the (internal) Resource Type */
 192
 193         if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
 194         {
 195             ACPI_ERROR ((AE_INFO,
 196                 "Invalid descriptor type (0x%X) in resource list",
 197                 Resource->Type));
 198             return_ACPI_STATUS (AE_BAD_DATA);
 199         }
 200
 201         /* Sanity check the length. It must not be zero, or we loop forever */
 202
 203         if (!Resource->Length)
 204         {
 205             ACPI_ERROR ((AE_INFO,
 206                 "Invalid zero length descriptor in resource list\n"));
 207             return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
 208         }
 209
 210         /* Perform the conversion */
 211
 212         if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS)
 213         {
 214             if (Resource->Data.CommonSerialBus.Type >
 215                 AML_RESOURCE_MAX_SERIALBUSTYPE)
 216             {
 217                 ConversionTable = NULL;
 218             }
 219             else
 220             {
 221                 /* This is an I2C, SPI, or UART SerialBus descriptor */
 222
 223                 ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[
 224                     Resource->Data.CommonSerialBus.Type];
 225             }
 226         }
 227         else
 228         {
 229             ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type];
 230         }
 231
 232         if (!ConversionTable)
 233         {
 234             ACPI_ERROR ((AE_INFO,
 235                 "Invalid/unsupported resource descriptor: Type 0x%2.2X",
 236                 Resource->Type));
 237             return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
 238         }
 239
 240         Status = AcpiRsConvertResourceToAml (Resource,
 241             ACPI_CAST_PTR (AML_RESOURCE, Aml), ConversionTable);
 242         if (ACPI_FAILURE (Status))
 243         {
 244             ACPI_EXCEPTION ((AE_INFO, Status,
 245                 "Could not convert resource (type 0x%X) to AML",
 246                 Resource->Type));
 247             return_ACPI_STATUS (Status);
 248         }
 249
 250         /* Perform final sanity check on the new AML resource descriptor */
 251
 252         Status = AcpiUtValidateResource (
 253             NULL, ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
 254         if (ACPI_FAILURE (Status))
 255         {
 256             return_ACPI_STATUS (Status);
 257         }
 258
 259         /* Check for end-of-list, normal exit */
 260
 261         if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
 262         {
 263             /* An End Tag indicates the end of the input Resource Template */
 264
 265             return_ACPI_STATUS (AE_OK);
 266         }
 267
 268         /*
 269          * Extract the total length of the new descriptor and set the
 270          * Aml to point to the next (output) resource descriptor
 271          */
 272         Aml += AcpiUtGetDescriptorLength (Aml);
 273
 274         /* Point to the next input resource descriptor */
 275
 276         Resource = ACPI_NEXT_RESOURCE (Resource);
 277     }
 278
 279     /* Completed buffer, but did not find an EndTag resource descriptor */
 280
 281     return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
 282 }