Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: rslist - Linked list utilities |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 6c9deb7 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/acresrc.h> |
| 46 | |
| 47 | #define _COMPONENT ACPI_RESOURCES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 48 | ACPI_MODULE_NAME("rslist") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /******************************************************************************* |
| 51 | * |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 52 | * FUNCTION: acpi_rs_convert_aml_to_resources |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | * |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 54 | * PARAMETERS: acpi_walk_aml_callback |
| 55 | * resource_ptr - Pointer to the buffer that will |
| 56 | * contain the output structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | * |
| 58 | * RETURN: Status |
| 59 | * |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 60 | * DESCRIPTION: Convert an AML resource to an internal representation of the |
| 61 | * resource that is aligned and easier to access. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | * |
| 63 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | acpi_status |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 65 | acpi_rs_convert_aml_to_resources(u8 * aml, |
| 66 | u32 length, |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 67 | u32 offset, u8 resource_index, void **context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 69 | struct acpi_resource **resource_ptr = |
| 70 | ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); |
| 71 | struct acpi_resource *resource; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 74 | ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 76 | /* |
| 77 | * Check that the input buffer and all subsequent pointers into it |
| 78 | * are aligned on a native word boundary. Most important on IA64 |
| 79 | */ |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 80 | resource = *resource_ptr; |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 81 | if (ACPI_IS_MISALIGNED(resource)) { |
| 82 | ACPI_WARNING((AE_INFO, |
| 83 | "Misaligned resource pointer %p", resource)); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 84 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 86 | /* Convert the AML byte stream resource to a local resource struct */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 88 | status = |
| 89 | acpi_rs_convert_aml_to_resource(resource, |
| 90 | ACPI_CAST_PTR(union aml_resource, |
| 91 | aml), |
| 92 | acpi_gbl_get_resource_dispatch |
| 93 | [resource_index]); |
| 94 | if (ACPI_FAILURE(status)) { |
| 95 | ACPI_EXCEPTION((AE_INFO, status, |
| 96 | "Could not convert AML resource (Type %X)", |
| 97 | *aml)); |
| 98 | return_ACPI_STATUS(status); |
| 99 | } |
| 100 | |
| 101 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 102 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 103 | acpi_ut_get_resource_type(aml), length, |
| 104 | resource->length)); |
| 105 | |
| 106 | /* Point to the next structure in the output buffer */ |
| 107 | |
| 108 | *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length); |
| 109 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /******************************************************************************* |
| 113 | * |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 114 | * FUNCTION: acpi_rs_convert_resources_to_aml |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | * |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 116 | * PARAMETERS: Resource - Pointer to the resource linked list |
| 117 | * aml_size_needed - Calculated size of the byte stream |
| 118 | * needed from calling acpi_rs_get_aml_length() |
| 119 | * The size of the output_buffer is |
| 120 | * guaranteed to be >= aml_size_needed |
| 121 | * output_buffer - Pointer to the buffer that will |
| 122 | * contain the byte stream |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | * |
| 124 | * RETURN: Status |
| 125 | * |
| 126 | * DESCRIPTION: Takes the resource linked list and parses it, creating a |
| 127 | * byte stream of resources in the caller's output buffer |
| 128 | * |
| 129 | ******************************************************************************/ |
| 130 | |
| 131 | acpi_status |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 132 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
| 133 | acpi_size aml_size_needed, u8 * output_buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 135 | u8 *aml = output_buffer; |
| 136 | u8 *end_aml = output_buffer + aml_size_needed; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 137 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 139 | ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 141 | /* Walk the resource descriptor list, convert each descriptor */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 143 | while (aml < end_aml) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 144 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 145 | /* Validate the (internal) Resource Type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 147 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 148 | ACPI_ERROR((AE_INFO, |
| 149 | "Invalid descriptor type (%X) in resource list", |
| 150 | resource->type)); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 151 | return_ACPI_STATUS(AE_BAD_DATA); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 154 | /* Perform the conversion */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 155 | |
Len Brown | fd35094 | 2007-05-09 23:34:35 -0400 | [diff] [blame^] | 156 | status = acpi_rs_convert_resource_to_aml(resource, ACPI_CAST_PTR(union |
| 157 | aml_resource, |
| 158 | aml), |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 159 | acpi_gbl_set_resource_dispatch |
| 160 | [resource->type]); |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 161 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 162 | ACPI_EXCEPTION((AE_INFO, status, |
| 163 | "Could not convert resource (type %X) to AML", |
| 164 | resource->type)); |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 165 | return_ACPI_STATUS(status); |
| 166 | } |
| 167 | |
| 168 | /* Perform final sanity check on the new AML resource descriptor */ |
| 169 | |
| 170 | status = |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 171 | acpi_ut_validate_resource(ACPI_CAST_PTR |
| 172 | (union aml_resource, aml), NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | if (ACPI_FAILURE(status)) { |
| 174 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 177 | /* Check for end-of-list, normal exit */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 178 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 179 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 180 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 181 | /* An End Tag indicates the end of the input Resource Template */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 182 | |
| 183 | return_ACPI_STATUS(AE_OK); |
| 184 | } |
| 185 | |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 186 | /* |
| 187 | * Extract the total length of the new descriptor and set the |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 188 | * Aml to point to the next (output) resource descriptor |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 189 | */ |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 190 | aml += acpi_ut_get_descriptor_length(aml); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 192 | /* Point to the next input resource descriptor */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 193 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 194 | resource = |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 195 | ACPI_ADD_PTR(struct acpi_resource, resource, |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 196 | resource->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
Bob Moore | 0897831 | 2005-10-21 00:00:00 -0400 | [diff] [blame] | 198 | |
| 199 | /* Completed buffer, but did not find an end_tag resource descriptor */ |
| 200 | |
| 201 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |