1 /******************************************************************************* 2 * 3 * Module Name: rslist - Linked list utilities 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2022, 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 MERCHANTABILITY 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, UART, or CSI2 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 if (!Resource->Length) 142 { 143 ACPI_EXCEPTION ((AE_INFO, Status, 144 "Zero-length resource returned from RsConvertAmlToResource")); 145 } 146 147 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, 148 "Type %.2X, AmlLength %.2X InternalLength %.2X\n", 149 AcpiUtGetResourceType (Aml), Length, 150 Resource->Length)); 151 152 /* Point to the next structure in the output buffer */ 153 154 *ResourcePtr = ACPI_NEXT_RESOURCE (Resource); 155 return_ACPI_STATUS (AE_OK); 156 } 157 158 159 /******************************************************************************* 160 * 161 * FUNCTION: AcpiRsConvertResourcesToAml 162 * 163 * PARAMETERS: Resource - Pointer to the resource linked list 164 * AmlSizeNeeded - Calculated size of the byte stream 165 * needed from calling AcpiRsGetAmlLength() 166 * The size of the OutputBuffer is 167 * guaranteed to be >= AmlSizeNeeded 168 * OutputBuffer - Pointer to the buffer that will 169 * contain the byte stream 170 * 171 * RETURN: Status 172 * 173 * DESCRIPTION: Takes the resource linked list and parses it, creating a 174 * byte stream of resources in the caller's output buffer 175 * 176 ******************************************************************************/ 177 178 ACPI_STATUS 179 AcpiRsConvertResourcesToAml ( 180 ACPI_RESOURCE *Resource, 181 ACPI_SIZE AmlSizeNeeded, 182 UINT8 *OutputBuffer) 183 { 184 UINT8 *Aml = OutputBuffer; 185 UINT8 *EndAml = OutputBuffer + AmlSizeNeeded; 186 ACPI_RSCONVERT_INFO *ConversionTable; 187 ACPI_STATUS Status; 188 189 190 ACPI_FUNCTION_TRACE (RsConvertResourcesToAml); 191 192 193 /* Walk the resource descriptor list, convert each descriptor */ 194 195 while (Aml < EndAml) 196 { 197 /* Validate the (internal) Resource Type */ 198 199 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) 200 { 201 ACPI_ERROR ((AE_INFO, 202 "Invalid descriptor type (0x%X) in resource list", 203 Resource->Type)); 204 return_ACPI_STATUS (AE_BAD_DATA); 205 } 206 207 /* Sanity check the length. It must not be zero, or we loop forever */ 208 209 if (!Resource->Length) 210 { 211 ACPI_ERROR ((AE_INFO, 212 "Invalid zero length descriptor in resource list\n")); 213 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); 214 } 215 216 /* Perform the conversion */ 217 218 if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS) 219 { 220 if (Resource->Data.CommonSerialBus.Type > 221 AML_RESOURCE_MAX_SERIALBUSTYPE) 222 { 223 ConversionTable = NULL; 224 } 225 else 226 { 227 /* This is an I2C, SPI, UART or CSI2 SerialBus descriptor */ 228 229 ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[ 230 Resource->Data.CommonSerialBus.Type]; 231 } 232 } 233 else 234 { 235 ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type]; 236 } 237 238 if (!ConversionTable) 239 { 240 ACPI_ERROR ((AE_INFO, 241 "Invalid/unsupported resource descriptor: Type 0x%2.2X", 242 Resource->Type)); 243 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); 244 } 245 246 Status = AcpiRsConvertResourceToAml (Resource, 247 ACPI_CAST_PTR (AML_RESOURCE, Aml), ConversionTable); 248 if (ACPI_FAILURE (Status)) 249 { 250 ACPI_EXCEPTION ((AE_INFO, Status, 251 "Could not convert resource (type 0x%X) to AML", 252 Resource->Type)); 253 return_ACPI_STATUS (Status); 254 } 255 256 /* Perform final sanity check on the new AML resource descriptor */ 257 258 Status = AcpiUtValidateResource ( 259 NULL, ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL); 260 if (ACPI_FAILURE (Status)) 261 { 262 return_ACPI_STATUS (Status); 263 } 264 265 /* Check for end-of-list, normal exit */ 266 267 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) 268 { 269 /* An End Tag indicates the end of the input Resource Template */ 270 271 return_ACPI_STATUS (AE_OK); 272 } 273 274 /* 275 * Extract the total length of the new descriptor and set the 276 * Aml to point to the next (output) resource descriptor 277 */ 278 Aml += AcpiUtGetDescriptorLength (Aml); 279 280 /* Point to the next input resource descriptor */ 281 282 Resource = ACPI_NEXT_RESOURCE (Resource); 283 } 284 285 /* Completed buffer, but did not find an EndTag resource descriptor */ 286 287 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 288 } 289