1 /******************************************************************************* 2 * 3 * Module Name: rslist - Linked list utilities 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <contrib/dev/acpica/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 if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) 101 { 102 if (AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE) 103 { 104 ConversionTable = NULL; 105 } 106 else 107 { 108 /* This is an I2C, SPI, or UART SerialBus descriptor */ 109 110 ConversionTable = 111 AcpiGbl_ConvertResourceSerialBusDispatch[ 112 AmlResource->CommonSerialBus.Type]; 113 } 114 } 115 else 116 { 117 ConversionTable = 118 AcpiGbl_GetResourceDispatch[ResourceIndex]; 119 } 120 121 if (!ConversionTable) 122 { 123 ACPI_ERROR ((AE_INFO, 124 "Invalid/unsupported resource descriptor: Type 0x%2.2X", 125 ResourceIndex)); 126 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 127 } 128 129 /* Convert the AML byte stream resource to a local resource struct */ 130 131 Status = AcpiRsConvertAmlToResource ( 132 Resource, AmlResource, ConversionTable); 133 if (ACPI_FAILURE (Status)) 134 { 135 ACPI_EXCEPTION ((AE_INFO, Status, 136 "Could not convert AML resource (Type 0x%X)", *Aml)); 137 return_ACPI_STATUS (Status); 138 } 139 140 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 141 "Type %.2X, AmlLength %.2X InternalLength %.2X\n", 142 AcpiUtGetResourceType (Aml), Length, 143 Resource->Length)); 144 145 /* Point to the next structure in the output buffer */ 146 147 *ResourcePtr = ACPI_NEXT_RESOURCE (Resource); 148 return_ACPI_STATUS (AE_OK); 149 } 150 151 152 /******************************************************************************* 153 * 154 * FUNCTION: AcpiRsConvertResourcesToAml 155 * 156 * PARAMETERS: Resource - Pointer to the resource linked list 157 * AmlSizeNeeded - Calculated size of the byte stream 158 * needed from calling AcpiRsGetAmlLength() 159 * The size of the OutputBuffer is 160 * guaranteed to be >= AmlSizeNeeded 161 * OutputBuffer - Pointer to the buffer that will 162 * contain the byte stream 163 * 164 * RETURN: Status 165 * 166 * DESCRIPTION: Takes the resource linked list and parses it, creating a 167 * byte stream of resources in the caller's output buffer 168 * 169 ******************************************************************************/ 170 171 ACPI_STATUS 172 AcpiRsConvertResourcesToAml ( 173 ACPI_RESOURCE *Resource, 174 ACPI_SIZE AmlSizeNeeded, 175 UINT8 *OutputBuffer) 176 { 177 UINT8 *Aml = OutputBuffer; 178 UINT8 *EndAml = OutputBuffer + AmlSizeNeeded; 179 ACPI_RSCONVERT_INFO *ConversionTable; 180 ACPI_STATUS Status; 181 182 183 ACPI_FUNCTION_TRACE (RsConvertResourcesToAml); 184 185 186 /* Walk the resource descriptor list, convert each descriptor */ 187 188 while (Aml < EndAml) 189 { 190 /* Validate the (internal) Resource Type */ 191 192 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 193 { 194 ACPI_ERROR ((AE_INFO, 195 "Invalid descriptor type (0x%X) in resource list", 196 Resource->Type)); 197 return_ACPI_STATUS (AE_BAD_DATA); 198 } 199 200 /* Sanity check the length. It must not be zero, or we loop forever */ 201 202 if (!Resource->Length) 203 { 204 ACPI_ERROR ((AE_INFO, 205 "Invalid zero length descriptor in resource list\n")); 206 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 207 } 208 209 /* Perform the conversion */ 210 211 if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS) 212 { 213 if (Resource->Data.CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE) 214 { 215 ConversionTable = NULL; 216 } 217 else 218 { 219 /* This is an I2C, SPI, or UART SerialBus descriptor */ 220 221 ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[ 222 Resource->Data.CommonSerialBus.Type]; 223 } 224 } 225 else 226 { 227 ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type]; 228 } 229 230 if (!ConversionTable) 231 { 232 ACPI_ERROR ((AE_INFO, 233 "Invalid/unsupported resource descriptor: Type 0x%2.2X", 234 Resource->Type)); 235 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 236 } 237 238 Status = AcpiRsConvertResourceToAml (Resource, 239 ACPI_CAST_PTR (AML_RESOURCE, Aml), 240 ConversionTable); 241 if (ACPI_FAILURE (Status)) 242 { 243 ACPI_EXCEPTION ((AE_INFO, Status, 244 "Could not convert resource (type 0x%X) to AML", 245 Resource->Type)); 246 return_ACPI_STATUS (Status); 247 } 248 249 /* Perform final sanity check on the new AML resource descriptor */ 250 251 Status = AcpiUtValidateResource (NULL, 252 ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL); 253 if (ACPI_FAILURE (Status)) 254 { 255 return_ACPI_STATUS (Status); 256 } 257 258 /* Check for end-of-list, normal exit */ 259 260 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) 261 { 262 /* An End Tag indicates the end of the input Resource Template */ 263 264 return_ACPI_STATUS (AE_OK); 265 } 266 267 /* 268 * Extract the total length of the new descriptor and set the 269 * Aml to point to the next (output) resource descriptor 270 */ 271 Aml += AcpiUtGetDescriptorLength (Aml); 272 273 /* Point to the next input resource descriptor */ 274 275 Resource = ACPI_NEXT_RESOURCE (Resource); 276 } 277 278 /* Completed buffer, but did not find an EndTag resource descriptor */ 279 280 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 281 } 282