| | 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 | #include <acpi/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 | * FUNCTION: acpi_rs_convert_aml_to_resources |
| | 54 | * |
| | 55 | * PARAMETERS: acpi_walk_aml_callback |
| | 56 | * resource_ptr - Pointer to the buffer that will |
| | 57 | * contain the output structures |
| | 58 | * |
| | 59 | * RETURN: Status |
| | 60 | * |
| | 61 | * DESCRIPTION: Convert an AML resource to an internal representation of the |
| | 62 | * resource that is aligned and easier to access. |
| | 63 | * |
| | 64 | ******************************************************************************/ |
| | 65 | acpi_status |
| | 66 | acpi_rs_convert_aml_to_resources(u8 * aml, |
| | 67 | u32 length, |
| | 68 | u32 offset, u8 resource_index, void **context) |
| | 69 | { |
| | 70 | struct acpi_resource **resource_ptr = |
| | 71 | ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); |
| | 72 | struct acpi_resource *resource; |
| | 73 | union aml_resource *aml_resource; |
| | 74 | struct acpi_rsconvert_info *conversion_table; |
| | 75 | acpi_status status; |
| | 76 | |
| | 77 | ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); |
| | 78 | |
| | 79 | /* |
| | 80 | * Check that the input buffer and all subsequent pointers into it |
| | 81 | * are aligned on a native word boundary. Most important on IA64 |
| | 82 | */ |
| | 83 | resource = *resource_ptr; |
| | 84 | if (ACPI_IS_MISALIGNED(resource)) { |
| | 85 | ACPI_WARNING((AE_INFO, |
| | 86 | "Misaligned resource pointer %p", resource)); |
| | 87 | } |
| | 88 | |
| | 89 | /* Get the appropriate conversion info table */ |
| | 90 | |
| | 91 | aml_resource = ACPI_CAST_PTR(union aml_resource, aml); |
| | 92 | if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) { |
| | 93 | if (aml_resource->common_serial_bus.type > |
| | 94 | AML_RESOURCE_MAX_SERIALBUSTYPE) { |
| | 95 | conversion_table = NULL; |
| | 96 | } else { |
| | 97 | /* This is an I2C, SPI, or UART serial_bus descriptor */ |
| | 98 | |
| | 99 | conversion_table = |
| | 100 | acpi_gbl_convert_resource_serial_bus_dispatch |
| | 101 | [aml_resource->common_serial_bus.type]; |
| | 102 | } |
| | 103 | } else { |
| | 104 | conversion_table = |
| | 105 | acpi_gbl_get_resource_dispatch[resource_index]; |
| | 106 | } |
| | 107 | |
| | 108 | if (!conversion_table) { |
| | 109 | ACPI_ERROR((AE_INFO, |
| | 110 | "Invalid/unsupported resource descriptor: Type 0x%2.2X", |
| | 111 | resource_index)); |
| | 112 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
| | 113 | } |
| | 114 | |
| | 115 | /* Convert the AML byte stream resource to a local resource struct */ |
| | 116 | |
| | 117 | status = |
| | 118 | acpi_rs_convert_aml_to_resource(resource, aml_resource, |
| | 119 | conversion_table); |
| | 120 | if (ACPI_FAILURE(status)) { |
| | 121 | ACPI_EXCEPTION((AE_INFO, status, |
| | 122 | "Could not convert AML resource (Type 0x%X)", |
| | 123 | *aml)); |
| | 124 | return_ACPI_STATUS(status); |
| | 125 | } |
| | 126 | |
| | 127 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
| | 128 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
| | 129 | acpi_ut_get_resource_type(aml), length, |
| | 130 | resource->length)); |
| | 131 | |
| | 132 | /* Point to the next structure in the output buffer */ |
| | 133 | |
| | 134 | *resource_ptr = ACPI_NEXT_RESOURCE(resource); |
| | 135 | return_ACPI_STATUS(AE_OK); |
| | 136 | } |
| | 137 | |
| | 138 | /******************************************************************************* |
| | 139 | * |
| | 140 | * FUNCTION: acpi_rs_convert_resources_to_aml |
| | 141 | * |
| | 142 | * PARAMETERS: resource - Pointer to the resource linked list |
| | 143 | * aml_size_needed - Calculated size of the byte stream |
| | 144 | * needed from calling acpi_rs_get_aml_length() |
| | 145 | * The size of the output_buffer is |
| | 146 | * guaranteed to be >= aml_size_needed |
| | 147 | * output_buffer - Pointer to the buffer that will |
| | 148 | * contain the byte stream |
| | 149 | * |
| | 150 | * RETURN: Status |
| | 151 | * |
| | 152 | * DESCRIPTION: Takes the resource linked list and parses it, creating a |
| | 153 | * byte stream of resources in the caller's output buffer |
| | 154 | * |
| | 155 | ******************************************************************************/ |
| | 156 | |
| | 157 | acpi_status |
| | 158 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
| | 159 | acpi_size aml_size_needed, u8 * output_buffer) |
| | 160 | { |
| | 161 | u8 *aml = output_buffer; |
| | 162 | u8 *end_aml = output_buffer + aml_size_needed; |
| | 163 | struct acpi_rsconvert_info *conversion_table; |
| | 164 | acpi_status status; |
| | 165 | |
| | 166 | ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); |
| | 167 | |
| | 168 | /* Walk the resource descriptor list, convert each descriptor */ |
| | 169 | |
| | 170 | while (aml < end_aml) { |
| | 171 | |
| | 172 | /* Validate the (internal) Resource Type */ |
| | 173 | |
| | 174 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
| | 175 | ACPI_ERROR((AE_INFO, |
| | 176 | "Invalid descriptor type (0x%X) in resource list", |
| | 177 | resource->type)); |
| | 178 | return_ACPI_STATUS(AE_BAD_DATA); |
| | 179 | } |
| | 180 | |
| | 181 | /* Sanity check the length. It must not be zero, or we loop forever */ |
| | 182 | |
| | 183 | if (!resource->length) { |
| | 184 | ACPI_ERROR((AE_INFO, |
| | 185 | "Invalid zero length descriptor in resource list\n")); |
| | 186 | return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); |
| | 187 | } |
| | 188 | |
| | 189 | /* Perform the conversion */ |
| | 190 | |
| | 191 | if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { |
| | 192 | if (resource->data.common_serial_bus.type > |
| | 193 | AML_RESOURCE_MAX_SERIALBUSTYPE) { |
| | 194 | conversion_table = NULL; |
| | 195 | } else { |
| | 196 | /* This is an I2C, SPI, or UART serial_bus descriptor */ |
| | 197 | |
| | 198 | conversion_table = |
| | 199 | acpi_gbl_convert_resource_serial_bus_dispatch |
| | 200 | [resource->data.common_serial_bus.type]; |
| | 201 | } |
| | 202 | } else { |
| | 203 | conversion_table = |
| | 204 | acpi_gbl_set_resource_dispatch[resource->type]; |
| | 205 | } |
| | 206 | |
| | 207 | if (!conversion_table) { |
| | 208 | ACPI_ERROR((AE_INFO, |
| | 209 | "Invalid/unsupported resource descriptor: Type 0x%2.2X", |
| | 210 | resource->type)); |
| | 211 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
| | 212 | } |
| | 213 | |
| | 214 | status = acpi_rs_convert_resource_to_aml(resource, |
| | 215 | ACPI_CAST_PTR(union |
| | 216 | aml_resource, |
| | 217 | aml), |
| | 218 | conversion_table); |
| | 219 | if (ACPI_FAILURE(status)) { |
| | 220 | ACPI_EXCEPTION((AE_INFO, status, |
| | 221 | "Could not convert resource (type 0x%X) to AML", |
| | 222 | resource->type)); |
| | 223 | return_ACPI_STATUS(status); |
| | 224 | } |
| | 225 | |
| | 226 | /* Perform final sanity check on the new AML resource descriptor */ |
| | 227 | |
| | 228 | status = acpi_ut_validate_resource(NULL, |
| | 229 | ACPI_CAST_PTR(union |
| | 230 | aml_resource, |
| | 231 | aml), NULL); |
| | 232 | if (ACPI_FAILURE(status)) { |
| | 233 | return_ACPI_STATUS(status); |
| | 234 | } |
| | 235 | |
| | 236 | /* Check for end-of-list, normal exit */ |
| | 237 | |
| | 238 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
| | 239 | |
| | 240 | /* An End Tag indicates the end of the input Resource Template */ |
| | 241 | |
| | 242 | return_ACPI_STATUS(AE_OK); |
| | 243 | } |
| | 244 | |
| | 245 | /* |
| | 246 | * Extract the total length of the new descriptor and set the |
| | 247 | * Aml to point to the next (output) resource descriptor |
| | 248 | */ |
| | 249 | aml += acpi_ut_get_descriptor_length(aml); |
| | 250 | |
| | 251 | /* Point to the next input resource descriptor */ |
| | 252 | |
| | 253 | resource = ACPI_NEXT_RESOURCE(resource); |
| | 254 | } |
| | 255 | |
| | 256 | /* Completed buffer, but did not find an end_tag resource descriptor */ |
| | 257 | |
| | 258 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
| | 259 | } |
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