]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rslist - Linked list utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
7735ca0e | 8 | * Copyright (C) 2000 - 2017, 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); | |
1fad8738 | 92 | |
e0fe0a8d LM |
93 | if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) { |
94 | if (aml_resource->common_serial_bus.type > | |
95 | AML_RESOURCE_MAX_SERIALBUSTYPE) { | |
96 | conversion_table = NULL; | |
97 | } else { | |
98 | /* This is an I2C, SPI, or UART serial_bus descriptor */ | |
99 | ||
100 | conversion_table = | |
101 | acpi_gbl_convert_resource_serial_bus_dispatch | |
102 | [aml_resource->common_serial_bus.type]; | |
103 | } | |
104 | } else { | |
105 | conversion_table = | |
106 | acpi_gbl_get_resource_dispatch[resource_index]; | |
107 | } | |
108 | ||
109 | if (!conversion_table) { | |
110 | ACPI_ERROR((AE_INFO, | |
111 | "Invalid/unsupported resource descriptor: Type 0x%2.2X", | |
112 | resource_index)); | |
68aafc35 | 113 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
e0fe0a8d LM |
114 | } |
115 | ||
61686124 BM |
116 | /* Convert the AML byte stream resource to a local resource struct */ |
117 | ||
118 | status = | |
e0fe0a8d LM |
119 | acpi_rs_convert_aml_to_resource(resource, aml_resource, |
120 | conversion_table); | |
61686124 BM |
121 | if (ACPI_FAILURE(status)) { |
122 | ACPI_EXCEPTION((AE_INFO, status, | |
f6a22b0b | 123 | "Could not convert AML resource (Type 0x%X)", |
61686124 BM |
124 | *aml)); |
125 | return_ACPI_STATUS(status); | |
44f6c012 | 126 | } |
1da177e4 | 127 | |
61686124 | 128 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
b229cf92 | 129 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
61686124 BM |
130 | acpi_ut_get_resource_type(aml), length, |
131 | resource->length)); | |
132 | ||
133 | /* Point to the next structure in the output buffer */ | |
1da177e4 | 134 | |
e0fe0a8d | 135 | *resource_ptr = ACPI_NEXT_RESOURCE(resource); |
61686124 | 136 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
137 | } |
138 | ||
1da177e4 LT |
139 | /******************************************************************************* |
140 | * | |
50eca3eb | 141 | * FUNCTION: acpi_rs_convert_resources_to_aml |
1da177e4 | 142 | * |
ba494bee | 143 | * PARAMETERS: resource - Pointer to the resource linked list |
50eca3eb BM |
144 | * aml_size_needed - Calculated size of the byte stream |
145 | * needed from calling acpi_rs_get_aml_length() | |
146 | * The size of the output_buffer is | |
147 | * guaranteed to be >= aml_size_needed | |
148 | * output_buffer - Pointer to the buffer that will | |
149 | * contain the byte stream | |
1da177e4 LT |
150 | * |
151 | * RETURN: Status | |
152 | * | |
153 | * DESCRIPTION: Takes the resource linked list and parses it, creating a | |
154 | * byte stream of resources in the caller's output buffer | |
155 | * | |
156 | ******************************************************************************/ | |
157 | ||
158 | acpi_status | |
50eca3eb BM |
159 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
160 | acpi_size aml_size_needed, u8 * output_buffer) | |
1da177e4 | 161 | { |
96db255c BM |
162 | u8 *aml = output_buffer; |
163 | u8 *end_aml = output_buffer + aml_size_needed; | |
e0fe0a8d | 164 | struct acpi_rsconvert_info *conversion_table; |
bda663d3 | 165 | acpi_status status; |
1da177e4 | 166 | |
b229cf92 | 167 | ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); |
1da177e4 | 168 | |
0897831b | 169 | /* Walk the resource descriptor list, convert each descriptor */ |
1da177e4 | 170 | |
96db255c | 171 | while (aml < end_aml) { |
52fc0b02 | 172 | |
96db255c | 173 | /* Validate the (internal) Resource Type */ |
44f6c012 | 174 | |
50eca3eb | 175 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
b8e4d893 | 176 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 177 | "Invalid descriptor type (0x%X) in resource list", |
b8e4d893 | 178 | resource->type)); |
bda663d3 | 179 | return_ACPI_STATUS(AE_BAD_DATA); |
44f6c012 | 180 | } |
1da177e4 | 181 | |
c13085e5 BM |
182 | /* Sanity check the length. It must not be zero, or we loop forever */ |
183 | ||
184 | if (!resource->length) { | |
185 | ACPI_ERROR((AE_INFO, | |
186 | "Invalid zero length descriptor in resource list\n")); | |
187 | return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); | |
188 | } | |
189 | ||
0897831b | 190 | /* Perform the conversion */ |
50eca3eb | 191 | |
e0fe0a8d LM |
192 | if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { |
193 | if (resource->data.common_serial_bus.type > | |
194 | AML_RESOURCE_MAX_SERIALBUSTYPE) { | |
195 | conversion_table = NULL; | |
196 | } else { | |
197 | /* This is an I2C, SPI, or UART serial_bus descriptor */ | |
198 | ||
199 | conversion_table = | |
200 | acpi_gbl_convert_resource_serial_bus_dispatch | |
201 | [resource->data.common_serial_bus.type]; | |
202 | } | |
203 | } else { | |
204 | conversion_table = | |
205 | acpi_gbl_set_resource_dispatch[resource->type]; | |
206 | } | |
207 | ||
208 | if (!conversion_table) { | |
209 | ACPI_ERROR((AE_INFO, | |
210 | "Invalid/unsupported resource descriptor: Type 0x%2.2X", | |
211 | resource->type)); | |
68aafc35 | 212 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
e0fe0a8d LM |
213 | } |
214 | ||
215 | status = acpi_rs_convert_resource_to_aml(resource, | |
216 | ACPI_CAST_PTR(union | |
217 | aml_resource, | |
218 | aml), | |
219 | conversion_table); | |
50eca3eb | 220 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 221 | ACPI_EXCEPTION((AE_INFO, status, |
f6a22b0b | 222 | "Could not convert resource (type 0x%X) to AML", |
b8e4d893 | 223 | resource->type)); |
50eca3eb BM |
224 | return_ACPI_STATUS(status); |
225 | } | |
226 | ||
227 | /* Perform final sanity check on the new AML resource descriptor */ | |
bda663d3 | 228 | |
1fad8738 BM |
229 | status = |
230 | acpi_ut_validate_resource(NULL, | |
231 | ACPI_CAST_PTR(union aml_resource, | |
232 | aml), NULL); | |
4be44fcd LB |
233 | if (ACPI_FAILURE(status)) { |
234 | return_ACPI_STATUS(status); | |
1da177e4 LT |
235 | } |
236 | ||
50eca3eb | 237 | /* Check for end-of-list, normal exit */ |
bda663d3 | 238 | |
50eca3eb | 239 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
52fc0b02 | 240 | |
50eca3eb | 241 | /* An End Tag indicates the end of the input Resource Template */ |
bda663d3 RM |
242 | |
243 | return_ACPI_STATUS(AE_OK); | |
244 | } | |
245 | ||
0897831b BM |
246 | /* |
247 | * Extract the total length of the new descriptor and set the | |
96db255c | 248 | * Aml to point to the next (output) resource descriptor |
0897831b | 249 | */ |
96db255c | 250 | aml += acpi_ut_get_descriptor_length(aml); |
1da177e4 | 251 | |
50eca3eb | 252 | /* Point to the next input resource descriptor */ |
44f6c012 | 253 | |
e0fe0a8d | 254 | resource = ACPI_NEXT_RESOURCE(resource); |
1da177e4 | 255 | } |
0897831b BM |
256 | |
257 | /* Completed buffer, but did not find an end_tag resource descriptor */ | |
258 | ||
259 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
1da177e4 | 260 | } |