1 /******************************************************************************* 2 * 3 * Module Name: rslist - Linked list utilities 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 __RSLIST_C__ 45 46 #include <contrib/dev/acpica/include/acpi.h> 47 #include <contrib/dev/acpica/include/accommon.h> 48 #include <contrib/dev/acpica/include/acresrc.h> 49 50 #define _COMPONENT ACPI_RESOURCES 51 ACPI_MODULE_NAME ("rslist") 52 53 54 /******************************************************************************* 55 * 56 * FUNCTION: AcpiRsConvertAmlToResources 57 * 58 * PARAMETERS: ACPI_WALK_AML_CALLBACK 59 * ResourcePtr - Pointer to the buffer that will 60 * contain the output structures 61 * 62 * RETURN: Status 63 * 64 * DESCRIPTION: Convert an AML resource to an internal representation of the 65 * resource that is aligned and easier to access. 66 * 67 ******************************************************************************/ 68 69 ACPI_STATUS 70 AcpiRsConvertAmlToResources ( 71 UINT8 *Aml, 72 UINT32 Length, 73 UINT32 Offset, 74 UINT8 ResourceIndex, 75 void **Context) 76 { 77 ACPI_RESOURCE **ResourcePtr = ACPI_CAST_INDIRECT_PTR ( 78 ACPI_RESOURCE, Context); 79 ACPI_RESOURCE *Resource; 80 AML_RESOURCE *AmlResource; 81 ACPI_RSCONVERT_INFO *ConversionTable; 82 ACPI_STATUS Status; 83 84 85 ACPI_FUNCTION_TRACE (RsConvertAmlToResources); 86 87 88 /* 89 * Check that the input buffer and all subsequent pointers into it 90 * are aligned on a native word boundary. Most important on IA64 91 */ 92 Resource = *ResourcePtr; 93 if (ACPI_IS_MISALIGNED (Resource)) 94 { 95 ACPI_WARNING ((AE_INFO, 96 "Misaligned resource pointer %p", Resource)); 97 } 98 99 /* Get the appropriate conversion info table */ 100 101 AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml); 102 if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) 103 { 104 if (AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE) 105 { 106 ConversionTable = NULL; 107 } 108 else 109 { 110 /* This is an I2C, SPI, or UART SerialBus descriptor */ 111 112 ConversionTable = 113 AcpiGbl_ConvertResourceSerialBusDispatch[ 114 AmlResource->CommonSerialBus.Type]; 115 } 116 } 117 else 118 { 119 ConversionTable = 120 AcpiGbl_GetResourceDispatch[ResourceIndex]; 121 } 122 123 if (!ConversionTable) 124 { 125 ACPI_ERROR ((AE_INFO, 126 "Invalid/unsupported resource descriptor: Type 0x%2.2X", 127 ResourceIndex)); 128 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 129 } 130 131 /* Convert the AML byte stream resource to a local resource struct */ 132 133 Status = AcpiRsConvertAmlToResource ( 134 Resource, AmlResource, ConversionTable); 135 if (ACPI_FAILURE (Status)) 136 { 137 ACPI_EXCEPTION ((AE_INFO, Status, 138 "Could not convert AML resource (Type 0x%X)", *Aml)); 139 return_ACPI_STATUS (Status); 140 } 141 142 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 143 "Type %.2X, AmlLength %.2X InternalLength %.2X\n", 144 AcpiUtGetResourceType (Aml), Length, 145 Resource->Length)); 146 147 /* Point to the next structure in the output buffer */ 148 149 *ResourcePtr = ACPI_NEXT_RESOURCE (Resource); 150 return_ACPI_STATUS (AE_OK); 151 } 152 153 154 /******************************************************************************* 155 * 156 * FUNCTION: AcpiRsConvertResourcesToAml 157 * 158 * PARAMETERS: Resource - Pointer to the resource linked list 159 * AmlSizeNeeded - Calculated size of the byte stream 160 * needed from calling AcpiRsGetAmlLength() 161 * The size of the OutputBuffer is 162 * guaranteed to be >= AmlSizeNeeded 163 * OutputBuffer - Pointer to the buffer that will 164 * contain the byte stream 165 * 166 * RETURN: Status 167 * 168 * DESCRIPTION: Takes the resource linked list and parses it, creating a 169 * byte stream of resources in the caller's output buffer 170 * 171 ******************************************************************************/ 172 173 ACPI_STATUS 174 AcpiRsConvertResourcesToAml ( 175 ACPI_RESOURCE *Resource, 176 ACPI_SIZE AmlSizeNeeded, 177 UINT8 *OutputBuffer) 178 { 179 UINT8 *Aml = OutputBuffer; 180 UINT8 *EndAml = OutputBuffer + AmlSizeNeeded; 181 ACPI_RSCONVERT_INFO *ConversionTable; 182 ACPI_STATUS Status; 183 184 185 ACPI_FUNCTION_TRACE (RsConvertResourcesToAml); 186 187 188 /* Walk the resource descriptor list, convert each descriptor */ 189 190 while (Aml < EndAml) 191 { 192 /* Validate the (internal) Resource Type */ 193 194 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 195 { 196 ACPI_ERROR ((AE_INFO, 197 "Invalid descriptor type (0x%X) in resource list", 198 Resource->Type)); 199 return_ACPI_STATUS (AE_BAD_DATA); 200 } 201 202 /* Sanity check the length. It must not be zero, or we loop forever */ 203 204 if (!Resource->Length) 205 { 206 ACPI_ERROR ((AE_INFO, 207 "Invalid zero length descriptor in resource list\n")); 208 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 209 } 210 211 /* Perform the conversion */ 212 213 if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS) 214 { 215 if (Resource->Data.CommonSerialBus.Type > 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), 242 ConversionTable); 243 if (ACPI_FAILURE (Status)) 244 { 245 ACPI_EXCEPTION ((AE_INFO, Status, 246 "Could not convert resource (type 0x%X) to AML", 247 Resource->Type)); 248 return_ACPI_STATUS (Status); 249 } 250 251 /* Perform final sanity check on the new AML resource descriptor */ 252 253 Status = AcpiUtValidateResource (NULL, 254 ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL); 255 if (ACPI_FAILURE (Status)) 256 { 257 return_ACPI_STATUS (Status); 258 } 259 260 /* Check for end-of-list, normal exit */ 261 262 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) 263 { 264 /* An End Tag indicates the end of the input Resource Template */ 265 266 return_ACPI_STATUS (AE_OK); 267 } 268 269 /* 270 * Extract the total length of the new descriptor and set the 271 * Aml to point to the next (output) resource descriptor 272 */ 273 Aml += AcpiUtGetDescriptorLength (Aml); 274 275 /* Point to the next input resource descriptor */ 276 277 Resource = ACPI_NEXT_RESOURCE (Resource); 278 } 279 280 /* Completed buffer, but did not find an EndTag resource descriptor */ 281 282 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 283 } 284