blob: c80a2eea3a0189ba49a19ed0ea2380fbb5bc924a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*******************************************************************************
2 *
3 * Module Name: rscreate - Create resource lists/tables
4 *
5 ******************************************************************************/
6
7/*
Bob Moorea8357b02010-01-22 19:07:36 +08008 * Copyright (C) 2000 - 2010, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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 Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acresrc.h"
47#include "acnamesp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#define _COMPONENT ACPI_RESOURCES
Len Brown4be44fc2005-08-05 00:44:28 -040050ACPI_MODULE_NAME("rscreate")
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52/*******************************************************************************
53 *
54 * FUNCTION: acpi_rs_create_resource_list
55 *
Bob Moore50eca3e2005-09-30 19:03:00 -040056 * PARAMETERS: aml_buffer - Pointer to the resource byte stream
57 * output_buffer - Pointer to the user's buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 *
Bob Moore50eca3e2005-09-30 19:03:00 -040059 * RETURN: Status: AE_OK if okay, else a valid acpi_status code
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * If output_buffer is not large enough, output_buffer_length
61 * indicates how large output_buffer should be, else it
62 * indicates how may u8 elements of output_buffer are valid.
63 *
64 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
65 * execution and parses the stream to create a linked list
66 * of device resources.
67 *
68 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -070069acpi_status
Bob Moore50eca3e2005-09-30 19:03:00 -040070acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer,
Len Brown4be44fc2005-08-05 00:44:28 -040071 struct acpi_buffer *output_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
73
Len Brown4be44fc2005-08-05 00:44:28 -040074 acpi_status status;
Bob Moore50eca3e2005-09-30 19:03:00 -040075 u8 *aml_start;
Len Brown4be44fc2005-08-05 00:44:28 -040076 acpi_size list_size_needed = 0;
Bob Moore50eca3e2005-09-30 19:03:00 -040077 u32 aml_buffer_length;
Bob Moore616861242006-03-17 16:44:00 -050078 void *resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Bob Mooreb229cf92006-04-21 17:15:00 -040080 ACPI_FUNCTION_TRACE(rs_create_resource_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
Bob Mooreb229cf92006-04-21 17:15:00 -040082 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlBuffer = %p\n", aml_buffer));
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Robert Moore44f6c012005-04-18 22:49:35 -040084 /* Params already validated, so we don't re-validate here */
85
Bob Moore50eca3e2005-09-30 19:03:00 -040086 aml_buffer_length = aml_buffer->buffer.length;
87 aml_start = aml_buffer->buffer.pointer;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89 /*
Bob Moore50eca3e2005-09-30 19:03:00 -040090 * Pass the aml_buffer into a module that can calculate
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 * the buffer size needed for the linked list
92 */
Bob Moore50eca3e2005-09-30 19:03:00 -040093 status = acpi_rs_get_list_length(aml_start, aml_buffer_length,
94 &list_size_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Bob Mooreb229cf92006-04-21 17:15:00 -040096 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
Len Brown4be44fc2005-08-05 00:44:28 -040097 status, (u32) list_size_needed));
98 if (ACPI_FAILURE(status)) {
99 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101
102 /* Validate/Allocate/Clear caller buffer */
103
Len Brown4be44fc2005-08-05 00:44:28 -0400104 status = acpi_ut_initialize_buffer(output_buffer, list_size_needed);
105 if (ACPI_FAILURE(status)) {
106 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
108
109 /* Do the conversion */
110
Bob Moore616861242006-03-17 16:44:00 -0500111 resource = output_buffer->pointer;
112 status = acpi_ut_walk_aml_resources(aml_start, aml_buffer_length,
113 acpi_rs_convert_aml_to_resources,
114 &resource);
Len Brown4be44fc2005-08-05 00:44:28 -0400115 if (ACPI_FAILURE(status)) {
116 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 }
118
Bob Mooreb229cf92006-04-21 17:15:00 -0400119 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400120 output_buffer->pointer, (u32) output_buffer->length));
121 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124/*******************************************************************************
125 *
126 * FUNCTION: acpi_rs_create_pci_routing_table
127 *
Frederik Schwarzer0211a9c2008-12-29 22:14:56 +0100128 * PARAMETERS: package_object - Pointer to a union acpi_operand_object
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 * package
130 * output_buffer - Pointer to the user's buffer
131 *
132 * RETURN: Status AE_OK if okay, else a valid acpi_status code.
133 * If the output_buffer is too small, the error will be
134 * AE_BUFFER_OVERFLOW and output_buffer->Length will point
135 * to the size buffer needed.
136 *
137 * DESCRIPTION: Takes the union acpi_operand_object package and creates a
138 * linked list of PCI interrupt descriptions
139 *
140 * NOTE: It is the caller's responsibility to ensure that the start of the
141 * output buffer is aligned properly (if necessary).
142 *
143 ******************************************************************************/
144
145acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400146acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
147 struct acpi_buffer *output_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Len Brown4be44fc2005-08-05 00:44:28 -0400149 u8 *buffer;
150 union acpi_operand_object **top_object_list;
151 union acpi_operand_object **sub_object_list;
152 union acpi_operand_object *obj_desc;
153 acpi_size buffer_size_needed = 0;
154 u32 number_of_elements;
155 u32 index;
156 struct acpi_pci_routing_table *user_prt;
157 struct acpi_namespace_node *node;
158 acpi_status status;
159 struct acpi_buffer path_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Bob Mooreb229cf92006-04-21 17:15:00 -0400161 ACPI_FUNCTION_TRACE(rs_create_pci_routing_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 /* Params already validated, so we don't re-validate here */
164
Robert Moore44f6c012005-04-18 22:49:35 -0400165 /* Get the required buffer length */
166
Len Brown4be44fc2005-08-05 00:44:28 -0400167 status = acpi_rs_get_pci_routing_table_length(package_object,
168 &buffer_size_needed);
169 if (ACPI_FAILURE(status)) {
170 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
172
Bob Mooreb229cf92006-04-21 17:15:00 -0400173 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400174 (u32) buffer_size_needed));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 /* Validate/Allocate/Clear caller buffer */
177
Len Brown4be44fc2005-08-05 00:44:28 -0400178 status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed);
179 if (ACPI_FAILURE(status)) {
180 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
182
183 /*
Bob Moorefd0a4322008-06-10 14:27:55 +0800184 * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
Bob Moore5df7e6c2010-01-21 10:06:32 +0800185 * package that in turn contains an u64 Address, a u8 Pin,
Bob Moorefd0a4322008-06-10 14:27:55 +0800186 * a Name, and a u8 source_index.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 */
Len Brown4be44fc2005-08-05 00:44:28 -0400188 top_object_list = package_object->package.elements;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 number_of_elements = package_object->package.count;
Len Brown4be44fc2005-08-05 00:44:28 -0400190 buffer = output_buffer->pointer;
191 user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 for (index = 0; index < number_of_elements; index++) {
Shaohua Li2f894ef2007-03-08 03:42:42 -0500194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 /*
196 * Point user_prt past this current structure
197 *
198 * NOTE: On the first iteration, user_prt->Length will
199 * be zero because we cleared the return buffer earlier
200 */
201 buffer += user_prt->length;
Len Brown4be44fc2005-08-05 00:44:28 -0400202 user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204 /*
205 * Fill in the Length field with the information we have at this point.
206 * The minus four is to subtract the size of the u8 Source[4] member
207 * because it is added below.
208 */
Len Brown4be44fc2005-08-05 00:44:28 -0400209 user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Robert Moore44f6c012005-04-18 22:49:35 -0400211 /* Each element of the top-level package must also be a package */
212
Bob Moore3371c192009-02-18 14:44:03 +0800213 if ((*top_object_list)->common.type != ACPI_TYPE_PACKAGE) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500214 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800215 "(PRT[%u]) Need sub-package, found %s",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500216 index,
217 acpi_ut_get_object_type_name
218 (*top_object_list)));
Len Brown4be44fc2005-08-05 00:44:28 -0400219 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 }
221
222 /* Each sub-package must be of length 4 */
223
224 if ((*top_object_list)->package.count != 4) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500225 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800226 "(PRT[%u]) Need package of length 4, found length %u",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500227 index, (*top_object_list)->package.count));
Len Brown4be44fc2005-08-05 00:44:28 -0400228 return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
230
231 /*
232 * Dereference the sub-package.
233 * The sub_object_list will now point to an array of the four IRQ
234 * elements: [Address, Pin, Source, source_index]
235 */
236 sub_object_list = (*top_object_list)->package.elements;
237
Robert Moore44f6c012005-04-18 22:49:35 -0400238 /* 1) First subobject: Dereference the PRT.Address */
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 obj_desc = sub_object_list[0];
Bob Moore3371c192009-02-18 14:44:03 +0800241 if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500242 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800243 "(PRT[%u].Address) Need Integer, found %s",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500244 index,
245 acpi_ut_get_object_type_name(obj_desc)));
Len Brown4be44fc2005-08-05 00:44:28 -0400246 return_ACPI_STATUS(AE_BAD_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 }
248
Bob Moorefd0a4322008-06-10 14:27:55 +0800249 user_prt->address = obj_desc->integer.value;
250
Robert Moore44f6c012005-04-18 22:49:35 -0400251 /* 2) Second subobject: Dereference the PRT.Pin */
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 obj_desc = sub_object_list[1];
Bob Moore3371c192009-02-18 14:44:03 +0800254 if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500255 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800256 "(PRT[%u].Pin) Need Integer, found %s",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500257 index,
258 acpi_ut_get_object_type_name(obj_desc)));
Len Brown4be44fc2005-08-05 00:44:28 -0400259 return_ACPI_STATUS(AE_BAD_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 }
261
Bob Moorefd0a4322008-06-10 14:27:55 +0800262 user_prt->pin = (u32) obj_desc->integer.value;
263
Shaohua Li2f894ef2007-03-08 03:42:42 -0500264 /*
Bob Moored0e184a2008-06-10 14:16:47 +0800265 * If the BIOS has erroneously reversed the _PRT source_name (index 2)
266 * and the source_index (index 3), fix it. _PRT is important enough to
267 * workaround this BIOS error. This also provides compatibility with
268 * other ACPI implementations.
269 */
270 obj_desc = sub_object_list[3];
Bob Moore3371c192009-02-18 14:44:03 +0800271 if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) {
Bob Moored0e184a2008-06-10 14:16:47 +0800272 sub_object_list[3] = sub_object_list[2];
273 sub_object_list[2] = obj_desc;
274
275 ACPI_WARNING((AE_INFO,
276 "(PRT[%X].Source) SourceName and SourceIndex are reversed, fixed",
277 index));
278 }
279
280 /*
Bob Mooreb8e4d892006-01-27 16:43:00 -0500281 * 3) Third subobject: Dereference the PRT.source_name
282 * The name may be unresolved (slack mode), so allow a null object
283 */
Zhang Rui82babbb382009-04-08 09:44:29 +0800284 obj_desc = sub_object_list[2];
Bob Mooreb8e4d892006-01-27 16:43:00 -0500285 if (obj_desc) {
Bob Moore3371c192009-02-18 14:44:03 +0800286 switch (obj_desc->common.type) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500287 case ACPI_TYPE_LOCAL_REFERENCE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Bob Moore1044f1f2008-09-27 11:08:41 +0800289 if (obj_desc->reference.class !=
290 ACPI_REFCLASS_NAME) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500291 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800292 "(PRT[%u].Source) Need name, found Reference Class 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500293 index,
Bob Moore1044f1f2008-09-27 11:08:41 +0800294 obj_desc->reference.class));
Bob Mooreb8e4d892006-01-27 16:43:00 -0500295 return_ACPI_STATUS(AE_BAD_DATA);
296 }
297
298 node = obj_desc->reference.node;
299
300 /* Use *remaining* length of the buffer as max for pathname */
301
302 path_buffer.length = output_buffer->length -
303 (u32) ((u8 *) user_prt->source -
304 (u8 *) output_buffer->pointer);
305 path_buffer.pointer = user_prt->source;
306
307 status =
308 acpi_ns_handle_to_pathname((acpi_handle)
309 node,
310 &path_buffer);
311
312 /* +1 to include null terminator */
313
314 user_prt->length +=
315 (u32) ACPI_STRLEN(user_prt->source) + 1;
316 break;
317
318 case ACPI_TYPE_STRING:
319
320 ACPI_STRCPY(user_prt->source,
321 obj_desc->string.pointer);
322
323 /*
324 * Add to the Length field the length of the string
325 * (add 1 for terminator)
326 */
327 user_prt->length += obj_desc->string.length + 1;
328 break;
329
330 case ACPI_TYPE_INTEGER:
331 /*
332 * If this is a number, then the Source Name is NULL, since the
333 * entire buffer was zeroed out, we can leave this alone.
334 *
335 * Add to the Length field the length of the u32 NULL
336 */
337 user_prt->length += sizeof(u32);
338 break;
339
340 default:
341
342 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800343 "(PRT[%u].Source) Need Ref/String/Integer, found %s",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500344 index,
345 acpi_ut_get_object_type_name
346 (obj_desc)));
Len Brown4be44fc2005-08-05 00:44:28 -0400347 return_ACPI_STATUS(AE_BAD_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 }
350
351 /* Now align the current length */
352
Len Brown4be44fc2005-08-05 00:44:28 -0400353 user_prt->length =
Bob Moore958dd242006-05-12 17:12:00 -0400354 (u32) ACPI_ROUND_UP_TO_64BIT(user_prt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Robert Moore44f6c012005-04-18 22:49:35 -0400356 /* 4) Fourth subobject: Dereference the PRT.source_index */
357
Zhang Rui82babbb382009-04-08 09:44:29 +0800358 obj_desc = sub_object_list[3];
Bob Moore3371c192009-02-18 14:44:03 +0800359 if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500360 ACPI_ERROR((AE_INFO,
Bob Mooref6a22b02010-03-05 17:56:40 +0800361 "(PRT[%u].SourceIndex) Need Integer, found %s",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500362 index,
363 acpi_ut_get_object_type_name(obj_desc)));
Len Brown4be44fc2005-08-05 00:44:28 -0400364 return_ACPI_STATUS(AE_BAD_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
366
Bob Moorefd0a4322008-06-10 14:27:55 +0800367 user_prt->source_index = (u32) obj_desc->integer.value;
368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 /* Point to the next union acpi_operand_object in the top level package */
370
371 top_object_list++;
372 }
373
Bob Mooreb229cf92006-04-21 17:15:00 -0400374 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400375 output_buffer->pointer, (u32) output_buffer->length));
376 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377}
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379/*******************************************************************************
380 *
Bob Moore50eca3e2005-09-30 19:03:00 -0400381 * FUNCTION: acpi_rs_create_aml_resources
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 *
383 * PARAMETERS: linked_list_buffer - Pointer to the resource linked list
384 * output_buffer - Pointer to the user's buffer
385 *
386 * RETURN: Status AE_OK if okay, else a valid acpi_status code.
387 * If the output_buffer is too small, the error will be
388 * AE_BUFFER_OVERFLOW and output_buffer->Length will point
389 * to the size buffer needed.
390 *
391 * DESCRIPTION: Takes the linked list of device resources and
392 * creates a bytestream to be used as input for the
393 * _SRS control method.
394 *
395 ******************************************************************************/
396
397acpi_status
Bob Moore50eca3e2005-09-30 19:03:00 -0400398acpi_rs_create_aml_resources(struct acpi_resource *linked_list_buffer,
399 struct acpi_buffer *output_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Len Brown4be44fc2005-08-05 00:44:28 -0400401 acpi_status status;
Bob Moore50eca3e2005-09-30 19:03:00 -0400402 acpi_size aml_size_needed = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Bob Mooreb229cf92006-04-21 17:15:00 -0400404 ACPI_FUNCTION_TRACE(rs_create_aml_resources);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Bob Mooreb229cf92006-04-21 17:15:00 -0400406 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "LinkedListBuffer = %p\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400407 linked_list_buffer));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409 /*
410 * Params already validated, so we don't re-validate here
411 *
412 * Pass the linked_list_buffer into a module that calculates
413 * the buffer size needed for the byte stream.
414 */
Bob Moore50eca3e2005-09-30 19:03:00 -0400415 status = acpi_rs_get_aml_length(linked_list_buffer, &aml_size_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Bob Mooreb229cf92006-04-21 17:15:00 -0400417 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
Bob Moore50eca3e2005-09-30 19:03:00 -0400418 (u32) aml_size_needed,
Len Brown4be44fc2005-08-05 00:44:28 -0400419 acpi_format_exception(status)));
420 if (ACPI_FAILURE(status)) {
421 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 }
423
424 /* Validate/Allocate/Clear caller buffer */
425
Bob Moore50eca3e2005-09-30 19:03:00 -0400426 status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed);
Len Brown4be44fc2005-08-05 00:44:28 -0400427 if (ACPI_FAILURE(status)) {
428 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 }
430
431 /* Do the conversion */
432
Len Brown4be44fc2005-08-05 00:44:28 -0400433 status =
Bob Moore50eca3e2005-09-30 19:03:00 -0400434 acpi_rs_convert_resources_to_aml(linked_list_buffer,
435 aml_size_needed,
436 output_buffer->pointer);
Len Brown4be44fc2005-08-05 00:44:28 -0400437 if (ACPI_FAILURE(status)) {
438 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 }
440
Bob Mooreb229cf92006-04-21 17:15:00 -0400441 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400442 output_buffer->pointer, (u32) output_buffer->length));
443 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}