| 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 | } |
| 283 | |