blob: f27feb4772f6306b10a3a897f3f2759f5fa8c237 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*******************************************************************************
2 *
3 * Module Name: rsxface - Public interfaces to the resource manager
4 *
5 ******************************************************************************/
6
7/*
Len Brown75a44ce2008-04-23 23:00:13 -04008 * Copyright (C) 2000 - 2008, 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("rsxface")
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Robert Moore44f6c012005-04-18 22:49:35 -040052/* Local macros for 16,32-bit to 64-bit conversion */
Robert Moore44f6c012005-04-18 22:49:35 -040053#define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field)
54#define ACPI_COPY_ADDRESS(out, in) \
55 ACPI_COPY_FIELD(out, in, resource_type); \
56 ACPI_COPY_FIELD(out, in, producer_consumer); \
57 ACPI_COPY_FIELD(out, in, decode); \
58 ACPI_COPY_FIELD(out, in, min_address_fixed); \
59 ACPI_COPY_FIELD(out, in, max_address_fixed); \
Bob Moore08978312005-10-21 00:00:00 -040060 ACPI_COPY_FIELD(out, in, info); \
Robert Moore44f6c012005-04-18 22:49:35 -040061 ACPI_COPY_FIELD(out, in, granularity); \
Bob Moore50eca3e2005-09-30 19:03:00 -040062 ACPI_COPY_FIELD(out, in, minimum); \
63 ACPI_COPY_FIELD(out, in, maximum); \
64 ACPI_COPY_FIELD(out, in, translation_offset); \
Robert Moore44f6c012005-04-18 22:49:35 -040065 ACPI_COPY_FIELD(out, in, address_length); \
66 ACPI_COPY_FIELD(out, in, resource_source);
Bob Moorec51a4de2005-11-17 13:07:00 -050067/* Local prototypes */
68static acpi_status
69acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context);
70
Bob Moore41195322006-05-26 16:36:00 -040071static acpi_status
72acpi_rs_validate_parameters(acpi_handle device_handle,
73 struct acpi_buffer *buffer,
74 struct acpi_namespace_node **return_node);
75
76/*******************************************************************************
77 *
78 * FUNCTION: acpi_rs_validate_parameters
79 *
80 * PARAMETERS: device_handle - Handle to a device
81 * Buffer - Pointer to a data buffer
82 * return_node - Pointer to where the device node is returned
83 *
84 * RETURN: Status
85 *
86 * DESCRIPTION: Common parameter validation for resource interfaces
87 *
88 ******************************************************************************/
89
90static acpi_status
91acpi_rs_validate_parameters(acpi_handle device_handle,
92 struct acpi_buffer *buffer,
93 struct acpi_namespace_node **return_node)
94{
95 acpi_status status;
96 struct acpi_namespace_node *node;
97
98 ACPI_FUNCTION_TRACE(rs_validate_parameters);
99
100 /*
101 * Must have a valid handle to an ACPI device
102 */
103 if (!device_handle) {
104 return_ACPI_STATUS(AE_BAD_PARAMETER);
105 }
106
Bob Mooref24b6642009-12-11 14:57:00 +0800107 node = acpi_ns_validate_handle(device_handle);
Bob Moore41195322006-05-26 16:36:00 -0400108 if (!node) {
109 return_ACPI_STATUS(AE_BAD_PARAMETER);
110 }
111
112 if (node->type != ACPI_TYPE_DEVICE) {
113 return_ACPI_STATUS(AE_TYPE);
114 }
115
116 /*
117 * Validate the user buffer object
118 *
119 * if there is a non-zero buffer length we also need a valid pointer in
120 * the buffer. If it's a zero buffer length, we'll be returning the
121 * needed buffer size (later), so keep going.
122 */
123 status = acpi_ut_validate_buffer(buffer);
124 if (ACPI_FAILURE(status)) {
125 return_ACPI_STATUS(status);
126 }
127
128 *return_node = node;
129 return_ACPI_STATUS(AE_OK);
130}
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132/*******************************************************************************
133 *
134 * FUNCTION: acpi_get_irq_routing_table
135 *
Bob Moore41195322006-05-26 16:36:00 -0400136 * PARAMETERS: device_handle - Handle to the Bus device we are querying
137 * ret_buffer - Pointer to a buffer to receive the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 * current resources for the device
139 *
140 * RETURN: Status
141 *
142 * DESCRIPTION: This function is called to get the IRQ routing table for a
Bob Moore41195322006-05-26 16:36:00 -0400143 * specific bus. The caller must first acquire a handle for the
144 * desired bus. The routine table is placed in the buffer pointed
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 * to by the ret_buffer variable parameter.
146 *
147 * If the function fails an appropriate status will be returned
148 * and the value of ret_buffer is undefined.
149 *
150 * This function attempts to execute the _PRT method contained in
151 * the object indicated by the passed device_handle.
152 *
153 ******************************************************************************/
Bob Moorec51a4de2005-11-17 13:07:00 -0500154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400156acpi_get_irq_routing_table(acpi_handle device_handle,
157 struct acpi_buffer *ret_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
Len Brown4be44fc2005-08-05 00:44:28 -0400159 acpi_status status;
Bob Moore41195322006-05-26 16:36:00 -0400160 struct acpi_namespace_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Bob Mooreb229cf92006-04-21 17:15:00 -0400162 ACPI_FUNCTION_TRACE(acpi_get_irq_routing_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Bob Moore41195322006-05-26 16:36:00 -0400164 /* Validate parameters then dispatch to internal routine */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Bob Moore41195322006-05-26 16:36:00 -0400166 status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
Len Brown4be44fc2005-08-05 00:44:28 -0400167 if (ACPI_FAILURE(status)) {
168 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 }
170
Bob Moore41195322006-05-26 16:36:00 -0400171 status = acpi_rs_get_prt_method_data(node, ret_buffer);
Len Brown4be44fc2005-08-05 00:44:28 -0400172 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
Bob Moore83135242006-10-03 00:00:00 -0400175ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table)
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177/*******************************************************************************
178 *
179 * FUNCTION: acpi_get_current_resources
180 *
Bob Moore41195322006-05-26 16:36:00 -0400181 * PARAMETERS: device_handle - Handle to the device object for the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 * device we are querying
Bob Moore41195322006-05-26 16:36:00 -0400183 * ret_buffer - Pointer to a buffer to receive the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 * current resources for the device
185 *
186 * RETURN: Status
187 *
188 * DESCRIPTION: This function is called to get the current resources for a
Bob Moore41195322006-05-26 16:36:00 -0400189 * specific device. The caller must first acquire a handle for
190 * the desired device. The resource data is placed in the buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 * pointed to by the ret_buffer variable parameter.
192 *
193 * If the function fails an appropriate status will be returned
194 * and the value of ret_buffer is undefined.
195 *
196 * This function attempts to execute the _CRS method contained in
197 * the object indicated by the passed device_handle.
198 *
199 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400201acpi_get_current_resources(acpi_handle device_handle,
202 struct acpi_buffer *ret_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Len Brown4be44fc2005-08-05 00:44:28 -0400204 acpi_status status;
Bob Moore41195322006-05-26 16:36:00 -0400205 struct acpi_namespace_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Bob Mooreb229cf92006-04-21 17:15:00 -0400207 ACPI_FUNCTION_TRACE(acpi_get_current_resources);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Bob Moore41195322006-05-26 16:36:00 -0400209 /* Validate parameters then dispatch to internal routine */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Bob Moore41195322006-05-26 16:36:00 -0400211 status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
Len Brown4be44fc2005-08-05 00:44:28 -0400212 if (ACPI_FAILURE(status)) {
213 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215
Bob Moore41195322006-05-26 16:36:00 -0400216 status = acpi_rs_get_crs_method_data(node, ret_buffer);
Len Brown4be44fc2005-08-05 00:44:28 -0400217 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Bob Moore83135242006-10-03 00:00:00 -0400220ACPI_EXPORT_SYMBOL(acpi_get_current_resources)
Bob Moore83135242006-10-03 00:00:00 -0400221#ifdef ACPI_FUTURE_USAGE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222/*******************************************************************************
223 *
224 * FUNCTION: acpi_get_possible_resources
225 *
Bob Moore41195322006-05-26 16:36:00 -0400226 * PARAMETERS: device_handle - Handle to the device object for the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 * device we are querying
Bob Moore41195322006-05-26 16:36:00 -0400228 * ret_buffer - Pointer to a buffer to receive the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 * resources for the device
230 *
231 * RETURN: Status
232 *
233 * DESCRIPTION: This function is called to get a list of the possible resources
Bob Moore41195322006-05-26 16:36:00 -0400234 * for a specific device. The caller must first acquire a handle
235 * for the desired device. The resource data is placed in the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 * buffer pointed to by the ret_buffer variable.
237 *
238 * If the function fails an appropriate status will be returned
239 * and the value of ret_buffer is undefined.
240 *
241 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400243acpi_get_possible_resources(acpi_handle device_handle,
244 struct acpi_buffer *ret_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
Len Brown4be44fc2005-08-05 00:44:28 -0400246 acpi_status status;
Bob Moore41195322006-05-26 16:36:00 -0400247 struct acpi_namespace_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Bob Mooreb229cf92006-04-21 17:15:00 -0400249 ACPI_FUNCTION_TRACE(acpi_get_possible_resources);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Bob Moore41195322006-05-26 16:36:00 -0400251 /* Validate parameters then dispatch to internal routine */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Bob Moore41195322006-05-26 16:36:00 -0400253 status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node);
Len Brown4be44fc2005-08-05 00:44:28 -0400254 if (ACPI_FAILURE(status)) {
255 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
257
Bob Moore41195322006-05-26 16:36:00 -0400258 status = acpi_rs_get_prs_method_data(node, ret_buffer);
Len Brown4be44fc2005-08-05 00:44:28 -0400259 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
Bob Moore83135242006-10-03 00:00:00 -0400262ACPI_EXPORT_SYMBOL(acpi_get_possible_resources)
Len Brown4be44fc2005-08-05 00:44:28 -0400263#endif /* ACPI_FUTURE_USAGE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264/*******************************************************************************
265 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 * FUNCTION: acpi_set_current_resources
267 *
Bob Moore41195322006-05-26 16:36:00 -0400268 * PARAMETERS: device_handle - Handle to the device object for the
269 * device we are setting resources
270 * in_buffer - Pointer to a buffer containing the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 * resources to be set for the device
272 *
273 * RETURN: Status
274 *
275 * DESCRIPTION: This function is called to set the current resources for a
Bob Moore41195322006-05-26 16:36:00 -0400276 * specific device. The caller must first acquire a handle for
277 * the desired device. The resource data is passed to the routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 * the buffer pointed to by the in_buffer variable.
279 *
280 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400282acpi_set_current_resources(acpi_handle device_handle,
283 struct acpi_buffer *in_buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
Len Brown4be44fc2005-08-05 00:44:28 -0400285 acpi_status status;
Bob Moore41195322006-05-26 16:36:00 -0400286 struct acpi_namespace_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Bob Mooreb229cf92006-04-21 17:15:00 -0400288 ACPI_FUNCTION_TRACE(acpi_set_current_resources);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Bob Moore41195322006-05-26 16:36:00 -0400290 /* Validate the buffer, don't allow zero length */
Robert Moore44f6c012005-04-18 22:49:35 -0400291
Bob Moore41195322006-05-26 16:36:00 -0400292 if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400293 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 }
295
Bob Moore41195322006-05-26 16:36:00 -0400296 /* Validate parameters then dispatch to internal routine */
297
298 status = acpi_rs_validate_parameters(device_handle, in_buffer, &node);
299 if (ACPI_FAILURE(status)) {
300 return_ACPI_STATUS(status);
301 }
302
303 status = acpi_rs_set_srs_method_data(node, in_buffer);
Len Brown4be44fc2005-08-05 00:44:28 -0400304 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Bob Moore83135242006-10-03 00:00:00 -0400307ACPI_EXPORT_SYMBOL(acpi_set_current_resources)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309/******************************************************************************
310 *
311 * FUNCTION: acpi_resource_to_address64
312 *
Bob Moore41195322006-05-26 16:36:00 -0400313 * PARAMETERS: Resource - Pointer to a resource
314 * Out - Pointer to the users's return buffer
315 * (a struct acpi_resource_address64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 *
317 * RETURN: Status
318 *
319 * DESCRIPTION: If the resource is an address16, address32, or address64,
Bob Moore41195322006-05-26 16:36:00 -0400320 * copy it to the address64 return buffer. This saves the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 * caller from having to duplicate code for different-sized
322 * addresses.
323 *
324 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400326acpi_resource_to_address64(struct acpi_resource *resource,
327 struct acpi_resource_address64 *out)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
Len Brown4be44fc2005-08-05 00:44:28 -0400329 struct acpi_resource_address16 *address16;
330 struct acpi_resource_address32 *address32;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Bob Moorec51a4de2005-11-17 13:07:00 -0500332 if (!resource || !out) {
333 return (AE_BAD_PARAMETER);
334 }
335
336 /* Convert 16 or 32 address descriptor to 64 */
337
Robert Moorebda663d2005-09-16 16:51:15 -0400338 switch (resource->type) {
Bob Moore50eca3e2005-09-30 19:03:00 -0400339 case ACPI_RESOURCE_TYPE_ADDRESS16:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Bob Mooreba9c3f52009-04-22 13:13:48 +0800341 address16 =
342 ACPI_CAST_PTR(struct acpi_resource_address16,
343 &resource->data);
Len Brown4be44fc2005-08-05 00:44:28 -0400344 ACPI_COPY_ADDRESS(out, address16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 break;
346
Bob Moore50eca3e2005-09-30 19:03:00 -0400347 case ACPI_RESOURCE_TYPE_ADDRESS32:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Bob Mooreba9c3f52009-04-22 13:13:48 +0800349 address32 =
350 ACPI_CAST_PTR(struct acpi_resource_address32,
351 &resource->data);
Len Brown4be44fc2005-08-05 00:44:28 -0400352 ACPI_COPY_ADDRESS(out, address32);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 break;
354
Bob Moore50eca3e2005-09-30 19:03:00 -0400355 case ACPI_RESOURCE_TYPE_ADDRESS64:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
357 /* Simple copy for 64 bit source */
358
Len Brown4be44fc2005-08-05 00:44:28 -0400359 ACPI_MEMCPY(out, &resource->data,
360 sizeof(struct acpi_resource_address64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 break;
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 default:
364 return (AE_BAD_PARAMETER);
365 }
366
367 return (AE_OK);
368}
Len Brown4be44fc2005-08-05 00:44:28 -0400369
Bob Moore83135242006-10-03 00:00:00 -0400370ACPI_EXPORT_SYMBOL(acpi_resource_to_address64)
Bob Moorec51a4de2005-11-17 13:07:00 -0500371
372/*******************************************************************************
373 *
374 * FUNCTION: acpi_get_vendor_resource
375 *
Bob Moore41195322006-05-26 16:36:00 -0400376 * PARAMETERS: device_handle - Handle for the parent device object
377 * Name - Method name for the parent resource
378 * (METHOD_NAME__CRS or METHOD_NAME__PRS)
379 * Uuid - Pointer to the UUID to be matched.
380 * includes both subtype and 16-byte UUID
381 * ret_buffer - Where the vendor resource is returned
Bob Moorec51a4de2005-11-17 13:07:00 -0500382 *
383 * RETURN: Status
384 *
385 * DESCRIPTION: Walk a resource template for the specified evice to find a
386 * vendor-defined resource that matches the supplied UUID and
387 * UUID subtype. Returns a struct acpi_resource of type Vendor.
388 *
389 ******************************************************************************/
Bob Moorec51a4de2005-11-17 13:07:00 -0500390acpi_status
391acpi_get_vendor_resource(acpi_handle device_handle,
392 char *name,
393 struct acpi_vendor_uuid * uuid,
394 struct acpi_buffer * ret_buffer)
395{
396 struct acpi_vendor_walk_info info;
397 acpi_status status;
398
399 /* Other parameters are validated by acpi_walk_resources */
400
401 if (!uuid || !ret_buffer) {
402 return (AE_BAD_PARAMETER);
403 }
404
405 info.uuid = uuid;
406 info.buffer = ret_buffer;
407 info.status = AE_NOT_EXIST;
408
409 /* Walk the _CRS or _PRS resource list for this device */
410
411 status =
412 acpi_walk_resources(device_handle, name,
413 acpi_rs_match_vendor_resource, &info);
414 if (ACPI_FAILURE(status)) {
415 return (status);
416 }
417
418 return (info.status);
419}
420
Bob Moore83135242006-10-03 00:00:00 -0400421ACPI_EXPORT_SYMBOL(acpi_get_vendor_resource)
422
Bob Moorec51a4de2005-11-17 13:07:00 -0500423/*******************************************************************************
424 *
425 * FUNCTION: acpi_rs_match_vendor_resource
426 *
Bob Moore61686122006-03-17 16:44:00 -0500427 * PARAMETERS: acpi_walk_resource_callback
Bob Moorec51a4de2005-11-17 13:07:00 -0500428 *
429 * RETURN: Status
430 *
431 * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID
432 *
433 ******************************************************************************/
Bob Moorec51a4de2005-11-17 13:07:00 -0500434static acpi_status
435acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
436{
437 struct acpi_vendor_walk_info *info = context;
438 struct acpi_resource_vendor_typed *vendor;
439 struct acpi_buffer *buffer;
440 acpi_status status;
441
442 /* Ignore all descriptors except Vendor */
443
444 if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) {
445 return (AE_OK);
446 }
447
448 vendor = &resource->data.vendor_typed;
449
450 /*
451 * For a valid match, these conditions must hold:
452 *
453 * 1) Length of descriptor data must be at least as long as a UUID struct
454 * 2) The UUID subtypes must match
455 * 3) The UUID data must match
456 */
457 if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) ||
458 (vendor->uuid_subtype != info->uuid->subtype) ||
459 (ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) {
460 return (AE_OK);
461 }
462
463 /* Validate/Allocate/Clear caller buffer */
464
465 buffer = info->buffer;
466 status = acpi_ut_initialize_buffer(buffer, resource->length);
467 if (ACPI_FAILURE(status)) {
468 return (status);
469 }
470
471 /* Found the correct resource, copy and return it */
472
473 ACPI_MEMCPY(buffer->pointer, resource, resource->length);
474 buffer->length = resource->length;
475
476 /* Found the desired descriptor, terminate resource walk */
477
478 info->status = AE_OK;
479 return (AE_CTRL_TERMINATE);
480}
Bob Moore83135242006-10-03 00:00:00 -0400481
Bob Moore41195322006-05-26 16:36:00 -0400482/*******************************************************************************
483 *
484 * FUNCTION: acpi_walk_resources
485 *
486 * PARAMETERS: device_handle - Handle to the device object for the
487 * device we are querying
488 * Name - Method name of the resources we want
489 * (METHOD_NAME__CRS or METHOD_NAME__PRS)
490 * user_function - Called for each resource
491 * Context - Passed to user_function
492 *
493 * RETURN: Status
494 *
495 * DESCRIPTION: Retrieves the current or possible resource list for the
496 * specified device. The user_function is called once for
497 * each resource in the list.
498 *
499 ******************************************************************************/
Bob Moore41195322006-05-26 16:36:00 -0400500acpi_status
501acpi_walk_resources(acpi_handle device_handle,
502 char *name,
503 acpi_walk_resource_callback user_function, void *context)
504{
505 acpi_status status;
506 struct acpi_buffer buffer;
507 struct acpi_resource *resource;
508 struct acpi_resource *resource_end;
509
510 ACPI_FUNCTION_TRACE(acpi_walk_resources);
511
512 /* Parameter validation */
513
514 if (!device_handle || !user_function || !name ||
515 (!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
516 !ACPI_COMPARE_NAME(name, METHOD_NAME__PRS))) {
517 return_ACPI_STATUS(AE_BAD_PARAMETER);
518 }
519
520 /* Get the _CRS or _PRS resource list */
521
522 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
523 status = acpi_rs_get_method_data(device_handle, name, &buffer);
524 if (ACPI_FAILURE(status)) {
525 return_ACPI_STATUS(status);
526 }
527
528 /* Buffer now contains the resource list */
529
530 resource = ACPI_CAST_PTR(struct acpi_resource, buffer.pointer);
531 resource_end =
532 ACPI_ADD_PTR(struct acpi_resource, buffer.pointer, buffer.length);
533
534 /* Walk the resource list until the end_tag is found (or buffer end) */
535
536 while (resource < resource_end) {
537
538 /* Sanity check the resource */
539
540 if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
541 status = AE_AML_INVALID_RESOURCE_TYPE;
542 break;
543 }
544
545 /* Invoke the user function, abort on any error returned */
546
547 status = user_function(resource, context);
548 if (ACPI_FAILURE(status)) {
549 if (status == AE_CTRL_TERMINATE) {
550
551 /* This is an OK termination by the user function */
552
553 status = AE_OK;
554 }
555 break;
556 }
557
558 /* end_tag indicates end-of-list */
559
560 if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
561 break;
562 }
563
564 /* Get the next resource descriptor */
565
566 resource =
567 ACPI_ADD_PTR(struct acpi_resource, resource,
568 resource->length);
569 }
570
571 ACPI_FREE(buffer.pointer);
572 return_ACPI_STATUS(status);
573}
574
575ACPI_EXPORT_SYMBOL(acpi_walk_resources)