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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rslist - Linked list utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acresrc.h" | |
1da177e4 LT |
47 | |
48 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 49 | ACPI_MODULE_NAME("rslist") |
1da177e4 | 50 | |
1da177e4 LT |
51 | /******************************************************************************* |
52 | * | |
50eca3eb | 53 | * FUNCTION: acpi_rs_convert_aml_to_resources |
1da177e4 | 54 | * |
61686124 BM |
55 | * PARAMETERS: acpi_walk_aml_callback |
56 | * resource_ptr - Pointer to the buffer that will | |
57 | * contain the output structures | |
1da177e4 LT |
58 | * |
59 | * RETURN: Status | |
60 | * | |
61686124 BM |
61 | * DESCRIPTION: Convert an AML resource to an internal representation of the |
62 | * resource that is aligned and easier to access. | |
1da177e4 LT |
63 | * |
64 | ******************************************************************************/ | |
1da177e4 | 65 | acpi_status |
61686124 BM |
66 | acpi_rs_convert_aml_to_resources(u8 * aml, |
67 | u32 length, | |
793c2388 | 68 | u32 offset, u8 resource_index, void **context) |
1da177e4 | 69 | { |
793c2388 BM |
70 | struct acpi_resource **resource_ptr = |
71 | ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); | |
72 | struct acpi_resource *resource; | |
e0fe0a8d LM |
73 | union aml_resource *aml_resource; |
74 | struct acpi_rsconvert_info *conversion_table; | |
4be44fcd | 75 | acpi_status status; |
4be44fcd | 76 | |
b229cf92 | 77 | ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); |
4be44fcd | 78 | |
61686124 BM |
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 | */ | |
793c2388 | 83 | resource = *resource_ptr; |
61686124 BM |
84 | if (ACPI_IS_MISALIGNED(resource)) { |
85 | ACPI_WARNING((AE_INFO, | |
86 | "Misaligned resource pointer %p", resource)); | |
87 | } | |
44f6c012 | 88 | |
e0fe0a8d LM |
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)); | |
68aafc35 | 112 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
e0fe0a8d LM |
113 | } |
114 | ||
61686124 BM |
115 | /* Convert the AML byte stream resource to a local resource struct */ |
116 | ||
117 | status = | |
e0fe0a8d LM |
118 | acpi_rs_convert_aml_to_resource(resource, aml_resource, |
119 | conversion_table); | |
61686124 BM |
120 | if (ACPI_FAILURE(status)) { |
121 | ACPI_EXCEPTION((AE_INFO, status, | |
f6a22b0b | 122 | "Could not convert AML resource (Type 0x%X)", |
61686124 BM |
123 | *aml)); |
124 | return_ACPI_STATUS(status); | |
44f6c012 | 125 | } |
1da177e4 | 126 | |
61686124 | 127 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
b229cf92 | 128 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
61686124 BM |
129 | acpi_ut_get_resource_type(aml), length, |
130 | resource->length)); | |
131 | ||
132 | /* Point to the next structure in the output buffer */ | |
1da177e4 | 133 | |
e0fe0a8d | 134 | *resource_ptr = ACPI_NEXT_RESOURCE(resource); |
61686124 | 135 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
136 | } |
137 | ||
1da177e4 LT |
138 | /******************************************************************************* |
139 | * | |
50eca3eb | 140 | * FUNCTION: acpi_rs_convert_resources_to_aml |
1da177e4 | 141 | * |
ba494bee | 142 | * PARAMETERS: resource - Pointer to the resource linked list |
50eca3eb BM |
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 | |
1da177e4 LT |
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 | |
50eca3eb BM |
158 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
159 | acpi_size aml_size_needed, u8 * output_buffer) | |
1da177e4 | 160 | { |
96db255c BM |
161 | u8 *aml = output_buffer; |
162 | u8 *end_aml = output_buffer + aml_size_needed; | |
e0fe0a8d | 163 | struct acpi_rsconvert_info *conversion_table; |
bda663d3 | 164 | acpi_status status; |
1da177e4 | 165 | |
b229cf92 | 166 | ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); |
1da177e4 | 167 | |
0897831b | 168 | /* Walk the resource descriptor list, convert each descriptor */ |
1da177e4 | 169 | |
96db255c | 170 | while (aml < end_aml) { |
52fc0b02 | 171 | |
96db255c | 172 | /* Validate the (internal) Resource Type */ |
44f6c012 | 173 | |
50eca3eb | 174 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
b8e4d893 | 175 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 176 | "Invalid descriptor type (0x%X) in resource list", |
b8e4d893 | 177 | resource->type)); |
bda663d3 | 178 | return_ACPI_STATUS(AE_BAD_DATA); |
44f6c012 | 179 | } |
1da177e4 | 180 | |
0897831b | 181 | /* Perform the conversion */ |
50eca3eb | 182 | |
e0fe0a8d LM |
183 | if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { |
184 | if (resource->data.common_serial_bus.type > | |
185 | AML_RESOURCE_MAX_SERIALBUSTYPE) { | |
186 | conversion_table = NULL; | |
187 | } else { | |
188 | /* This is an I2C, SPI, or UART serial_bus descriptor */ | |
189 | ||
190 | conversion_table = | |
191 | acpi_gbl_convert_resource_serial_bus_dispatch | |
192 | [resource->data.common_serial_bus.type]; | |
193 | } | |
194 | } else { | |
195 | conversion_table = | |
196 | acpi_gbl_set_resource_dispatch[resource->type]; | |
197 | } | |
198 | ||
199 | if (!conversion_table) { | |
200 | ACPI_ERROR((AE_INFO, | |
201 | "Invalid/unsupported resource descriptor: Type 0x%2.2X", | |
202 | resource->type)); | |
68aafc35 | 203 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
e0fe0a8d LM |
204 | } |
205 | ||
206 | status = acpi_rs_convert_resource_to_aml(resource, | |
207 | ACPI_CAST_PTR(union | |
208 | aml_resource, | |
209 | aml), | |
210 | conversion_table); | |
50eca3eb | 211 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 212 | ACPI_EXCEPTION((AE_INFO, status, |
f6a22b0b | 213 | "Could not convert resource (type 0x%X) to AML", |
b8e4d893 | 214 | resource->type)); |
50eca3eb BM |
215 | return_ACPI_STATUS(status); |
216 | } | |
217 | ||
218 | /* Perform final sanity check on the new AML resource descriptor */ | |
bda663d3 | 219 | |
886308ec BM |
220 | status = acpi_ut_validate_resource(NULL, |
221 | ACPI_CAST_PTR(union | |
222 | aml_resource, | |
223 | aml), NULL); | |
4be44fcd LB |
224 | if (ACPI_FAILURE(status)) { |
225 | return_ACPI_STATUS(status); | |
1da177e4 LT |
226 | } |
227 | ||
50eca3eb | 228 | /* Check for end-of-list, normal exit */ |
bda663d3 | 229 | |
50eca3eb | 230 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
52fc0b02 | 231 | |
50eca3eb | 232 | /* An End Tag indicates the end of the input Resource Template */ |
bda663d3 RM |
233 | |
234 | return_ACPI_STATUS(AE_OK); | |
235 | } | |
236 | ||
0897831b BM |
237 | /* |
238 | * Extract the total length of the new descriptor and set the | |
96db255c | 239 | * Aml to point to the next (output) resource descriptor |
0897831b | 240 | */ |
96db255c | 241 | aml += acpi_ut_get_descriptor_length(aml); |
1da177e4 | 242 | |
50eca3eb | 243 | /* Point to the next input resource descriptor */ |
44f6c012 | 244 | |
e0fe0a8d | 245 | resource = ACPI_NEXT_RESOURCE(resource); |
1da177e4 | 246 | } |
0897831b BM |
247 | |
248 | /* Completed buffer, but did not find an end_tag resource descriptor */ | |
249 | ||
250 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
1da177e4 | 251 | } |