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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rsxface - Public interfaces to the resource manager | |
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 | ||
214f2c90 | 44 | #include <linux/export.h> |
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acresrc.h" | |
48 | #include "acnamesp.h" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 51 | ACPI_MODULE_NAME("rsxface") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local macros for 16,32-bit to 64-bit conversion */ |
44f6c012 RM |
54 | #define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) |
55 | #define ACPI_COPY_ADDRESS(out, in) \ | |
56 | ACPI_COPY_FIELD(out, in, resource_type); \ | |
57 | ACPI_COPY_FIELD(out, in, producer_consumer); \ | |
58 | ACPI_COPY_FIELD(out, in, decode); \ | |
59 | ACPI_COPY_FIELD(out, in, min_address_fixed); \ | |
60 | ACPI_COPY_FIELD(out, in, max_address_fixed); \ | |
0897831b | 61 | ACPI_COPY_FIELD(out, in, info); \ |
44f6c012 | 62 | ACPI_COPY_FIELD(out, in, granularity); \ |
50eca3eb BM |
63 | ACPI_COPY_FIELD(out, in, minimum); \ |
64 | ACPI_COPY_FIELD(out, in, maximum); \ | |
65 | ACPI_COPY_FIELD(out, in, translation_offset); \ | |
44f6c012 RM |
66 | ACPI_COPY_FIELD(out, in, address_length); \ |
67 | ACPI_COPY_FIELD(out, in, resource_source); | |
c51a4de8 BM |
68 | /* Local prototypes */ |
69 | static acpi_status | |
70 | acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context); | |
71 | ||
4119532c BM |
72 | static acpi_status |
73 | acpi_rs_validate_parameters(acpi_handle device_handle, | |
74 | struct acpi_buffer *buffer, | |
75 | struct acpi_namespace_node **return_node); | |
76 | ||
77 | /******************************************************************************* | |
78 | * | |
79 | * FUNCTION: acpi_rs_validate_parameters | |
80 | * | |
81 | * PARAMETERS: device_handle - Handle to a device | |
ba494bee | 82 | * buffer - Pointer to a data buffer |
4119532c BM |
83 | * return_node - Pointer to where the device node is returned |
84 | * | |
85 | * RETURN: Status | |
86 | * | |
87 | * DESCRIPTION: Common parameter validation for resource interfaces | |
88 | * | |
89 | ******************************************************************************/ | |
90 | ||
91 | static acpi_status | |
92 | acpi_rs_validate_parameters(acpi_handle device_handle, | |
93 | struct acpi_buffer *buffer, | |
94 | struct acpi_namespace_node **return_node) | |
95 | { | |
96 | acpi_status status; | |
97 | struct acpi_namespace_node *node; | |
98 | ||
99 | ACPI_FUNCTION_TRACE(rs_validate_parameters); | |
100 | ||
101 | /* | |
102 | * Must have a valid handle to an ACPI device | |
103 | */ | |
104 | if (!device_handle) { | |
105 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
106 | } | |
107 | ||
f24b664d | 108 | node = acpi_ns_validate_handle(device_handle); |
4119532c BM |
109 | if (!node) { |
110 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
111 | } | |
112 | ||
113 | if (node->type != ACPI_TYPE_DEVICE) { | |
114 | return_ACPI_STATUS(AE_TYPE); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Validate the user buffer object | |
119 | * | |
120 | * if there is a non-zero buffer length we also need a valid pointer in | |
121 | * the buffer. If it's a zero buffer length, we'll be returning the | |
122 | * needed buffer size (later), so keep going. | |
123 | */ | |
124 | status = acpi_ut_validate_buffer(buffer); | |
125 | if (ACPI_FAILURE(status)) { | |
126 | return_ACPI_STATUS(status); | |
127 | } | |
128 | ||
129 | *return_node = node; | |
130 | return_ACPI_STATUS(AE_OK); | |
131 | } | |
132 | ||
1da177e4 LT |
133 | /******************************************************************************* |
134 | * | |
135 | * FUNCTION: acpi_get_irq_routing_table | |
136 | * | |
4119532c BM |
137 | * PARAMETERS: device_handle - Handle to the Bus device we are querying |
138 | * ret_buffer - Pointer to a buffer to receive the | |
1da177e4 LT |
139 | * current resources for the device |
140 | * | |
141 | * RETURN: Status | |
142 | * | |
143 | * DESCRIPTION: This function is called to get the IRQ routing table for a | |
4119532c BM |
144 | * specific bus. The caller must first acquire a handle for the |
145 | * desired bus. The routine table is placed in the buffer pointed | |
1da177e4 LT |
146 | * to by the ret_buffer variable parameter. |
147 | * | |
148 | * If the function fails an appropriate status will be returned | |
149 | * and the value of ret_buffer is undefined. | |
150 | * | |
151 | * This function attempts to execute the _PRT method contained in | |
152 | * the object indicated by the passed device_handle. | |
153 | * | |
154 | ******************************************************************************/ | |
c51a4de8 | 155 | |
1da177e4 | 156 | acpi_status |
4be44fcd LB |
157 | acpi_get_irq_routing_table(acpi_handle device_handle, |
158 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 159 | { |
4be44fcd | 160 | acpi_status status; |
4119532c | 161 | struct acpi_namespace_node *node; |
1da177e4 | 162 | |
b229cf92 | 163 | ACPI_FUNCTION_TRACE(acpi_get_irq_routing_table); |
1da177e4 | 164 | |
4119532c | 165 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 166 | |
4119532c | 167 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
168 | if (ACPI_FAILURE(status)) { |
169 | return_ACPI_STATUS(status); | |
1da177e4 LT |
170 | } |
171 | ||
4119532c | 172 | status = acpi_rs_get_prt_method_data(node, ret_buffer); |
4be44fcd | 173 | return_ACPI_STATUS(status); |
1da177e4 LT |
174 | } |
175 | ||
8313524a BM |
176 | ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table) |
177 | ||
1da177e4 LT |
178 | /******************************************************************************* |
179 | * | |
180 | * FUNCTION: acpi_get_current_resources | |
181 | * | |
4119532c | 182 | * PARAMETERS: device_handle - Handle to the device object for the |
1da177e4 | 183 | * device we are querying |
4119532c | 184 | * ret_buffer - Pointer to a buffer to receive the |
1da177e4 LT |
185 | * current resources for the device |
186 | * | |
187 | * RETURN: Status | |
188 | * | |
189 | * DESCRIPTION: This function is called to get the current resources for a | |
4119532c BM |
190 | * specific device. The caller must first acquire a handle for |
191 | * the desired device. The resource data is placed in the buffer | |
1da177e4 LT |
192 | * pointed to by the ret_buffer variable parameter. |
193 | * | |
194 | * If the function fails an appropriate status will be returned | |
195 | * and the value of ret_buffer is undefined. | |
196 | * | |
197 | * This function attempts to execute the _CRS method contained in | |
198 | * the object indicated by the passed device_handle. | |
199 | * | |
200 | ******************************************************************************/ | |
1da177e4 | 201 | acpi_status |
4be44fcd LB |
202 | acpi_get_current_resources(acpi_handle device_handle, |
203 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 204 | { |
4be44fcd | 205 | acpi_status status; |
4119532c | 206 | struct acpi_namespace_node *node; |
1da177e4 | 207 | |
b229cf92 | 208 | ACPI_FUNCTION_TRACE(acpi_get_current_resources); |
1da177e4 | 209 | |
4119532c | 210 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 211 | |
4119532c | 212 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
213 | if (ACPI_FAILURE(status)) { |
214 | return_ACPI_STATUS(status); | |
1da177e4 LT |
215 | } |
216 | ||
4119532c | 217 | status = acpi_rs_get_crs_method_data(node, ret_buffer); |
4be44fcd | 218 | return_ACPI_STATUS(status); |
1da177e4 | 219 | } |
1da177e4 | 220 | |
8313524a | 221 | ACPI_EXPORT_SYMBOL(acpi_get_current_resources) |
8313524a | 222 | #ifdef ACPI_FUTURE_USAGE |
1da177e4 LT |
223 | /******************************************************************************* |
224 | * | |
225 | * FUNCTION: acpi_get_possible_resources | |
226 | * | |
4119532c | 227 | * PARAMETERS: device_handle - Handle to the device object for the |
1da177e4 | 228 | * device we are querying |
4119532c | 229 | * ret_buffer - Pointer to a buffer to receive the |
1da177e4 LT |
230 | * resources for the device |
231 | * | |
232 | * RETURN: Status | |
233 | * | |
234 | * DESCRIPTION: This function is called to get a list of the possible resources | |
4119532c BM |
235 | * for a specific device. The caller must first acquire a handle |
236 | * for the desired device. The resource data is placed in the | |
1da177e4 LT |
237 | * buffer pointed to by the ret_buffer variable. |
238 | * | |
239 | * If the function fails an appropriate status will be returned | |
240 | * and the value of ret_buffer is undefined. | |
241 | * | |
242 | ******************************************************************************/ | |
1da177e4 | 243 | acpi_status |
4be44fcd LB |
244 | acpi_get_possible_resources(acpi_handle device_handle, |
245 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 246 | { |
4be44fcd | 247 | acpi_status status; |
4119532c | 248 | struct acpi_namespace_node *node; |
1da177e4 | 249 | |
b229cf92 | 250 | ACPI_FUNCTION_TRACE(acpi_get_possible_resources); |
1da177e4 | 251 | |
4119532c | 252 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 253 | |
4119532c | 254 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
255 | if (ACPI_FAILURE(status)) { |
256 | return_ACPI_STATUS(status); | |
1da177e4 LT |
257 | } |
258 | ||
4119532c | 259 | status = acpi_rs_get_prs_method_data(node, ret_buffer); |
4be44fcd | 260 | return_ACPI_STATUS(status); |
1da177e4 | 261 | } |
1da177e4 | 262 | |
8313524a | 263 | ACPI_EXPORT_SYMBOL(acpi_get_possible_resources) |
4be44fcd | 264 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
265 | /******************************************************************************* |
266 | * | |
267 | * FUNCTION: acpi_set_current_resources | |
268 | * | |
4119532c BM |
269 | * PARAMETERS: device_handle - Handle to the device object for the |
270 | * device we are setting resources | |
271 | * in_buffer - Pointer to a buffer containing the | |
1da177e4 LT |
272 | * resources to be set for the device |
273 | * | |
274 | * RETURN: Status | |
275 | * | |
276 | * DESCRIPTION: This function is called to set the current resources for a | |
4119532c BM |
277 | * specific device. The caller must first acquire a handle for |
278 | * the desired device. The resource data is passed to the routine | |
1da177e4 LT |
279 | * the buffer pointed to by the in_buffer variable. |
280 | * | |
281 | ******************************************************************************/ | |
1da177e4 | 282 | acpi_status |
4be44fcd LB |
283 | acpi_set_current_resources(acpi_handle device_handle, |
284 | struct acpi_buffer *in_buffer) | |
1da177e4 | 285 | { |
4be44fcd | 286 | acpi_status status; |
4119532c | 287 | struct acpi_namespace_node *node; |
1da177e4 | 288 | |
b229cf92 | 289 | ACPI_FUNCTION_TRACE(acpi_set_current_resources); |
1da177e4 | 290 | |
4119532c | 291 | /* Validate the buffer, don't allow zero length */ |
44f6c012 | 292 | |
4119532c | 293 | if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) { |
4be44fcd | 294 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
295 | } |
296 | ||
4119532c BM |
297 | /* Validate parameters then dispatch to internal routine */ |
298 | ||
299 | status = acpi_rs_validate_parameters(device_handle, in_buffer, &node); | |
300 | if (ACPI_FAILURE(status)) { | |
301 | return_ACPI_STATUS(status); | |
302 | } | |
303 | ||
304 | status = acpi_rs_set_srs_method_data(node, in_buffer); | |
4be44fcd | 305 | return_ACPI_STATUS(status); |
1da177e4 | 306 | } |
1da177e4 | 307 | |
8313524a | 308 | ACPI_EXPORT_SYMBOL(acpi_set_current_resources) |
1da177e4 | 309 | |
a91cdde2 BM |
310 | /******************************************************************************* |
311 | * | |
312 | * FUNCTION: acpi_get_event_resources | |
313 | * | |
314 | * PARAMETERS: device_handle - Handle to the device object for the | |
315 | * device we are getting resources | |
316 | * in_buffer - Pointer to a buffer containing the | |
317 | * resources to be set for the device | |
318 | * | |
319 | * RETURN: Status | |
320 | * | |
321 | * DESCRIPTION: This function is called to get the event resources for a | |
322 | * specific device. The caller must first acquire a handle for | |
323 | * the desired device. The resource data is passed to the routine | |
324 | * the buffer pointed to by the in_buffer variable. Uses the | |
325 | * _AEI method. | |
326 | * | |
327 | ******************************************************************************/ | |
328 | acpi_status | |
329 | acpi_get_event_resources(acpi_handle device_handle, | |
330 | struct acpi_buffer *ret_buffer) | |
331 | { | |
332 | acpi_status status; | |
333 | struct acpi_namespace_node *node; | |
334 | ||
335 | ACPI_FUNCTION_TRACE(acpi_get_event_resources); | |
336 | ||
337 | /* Validate parameters then dispatch to internal routine */ | |
338 | ||
339 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); | |
340 | if (ACPI_FAILURE(status)) { | |
341 | return_ACPI_STATUS(status); | |
342 | } | |
343 | ||
344 | status = acpi_rs_get_aei_method_data(node, ret_buffer); | |
345 | return_ACPI_STATUS(status); | |
346 | } | |
347 | ||
348 | ACPI_EXPORT_SYMBOL(acpi_get_event_resources) | |
349 | ||
1da177e4 LT |
350 | /****************************************************************************** |
351 | * | |
352 | * FUNCTION: acpi_resource_to_address64 | |
353 | * | |
ba494bee BM |
354 | * PARAMETERS: resource - Pointer to a resource |
355 | * out - Pointer to the users's return buffer | |
4119532c | 356 | * (a struct acpi_resource_address64) |
1da177e4 LT |
357 | * |
358 | * RETURN: Status | |
359 | * | |
360 | * DESCRIPTION: If the resource is an address16, address32, or address64, | |
4119532c | 361 | * copy it to the address64 return buffer. This saves the |
1da177e4 LT |
362 | * caller from having to duplicate code for different-sized |
363 | * addresses. | |
364 | * | |
365 | ******************************************************************************/ | |
1da177e4 | 366 | acpi_status |
4be44fcd LB |
367 | acpi_resource_to_address64(struct acpi_resource *resource, |
368 | struct acpi_resource_address64 *out) | |
1da177e4 | 369 | { |
4be44fcd LB |
370 | struct acpi_resource_address16 *address16; |
371 | struct acpi_resource_address32 *address32; | |
1da177e4 | 372 | |
c51a4de8 BM |
373 | if (!resource || !out) { |
374 | return (AE_BAD_PARAMETER); | |
375 | } | |
376 | ||
377 | /* Convert 16 or 32 address descriptor to 64 */ | |
378 | ||
bda663d3 | 379 | switch (resource->type) { |
50eca3eb | 380 | case ACPI_RESOURCE_TYPE_ADDRESS16: |
1da177e4 | 381 | |
ba9c3f55 BM |
382 | address16 = |
383 | ACPI_CAST_PTR(struct acpi_resource_address16, | |
384 | &resource->data); | |
4be44fcd | 385 | ACPI_COPY_ADDRESS(out, address16); |
1da177e4 LT |
386 | break; |
387 | ||
50eca3eb | 388 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
1da177e4 | 389 | |
ba9c3f55 BM |
390 | address32 = |
391 | ACPI_CAST_PTR(struct acpi_resource_address32, | |
392 | &resource->data); | |
4be44fcd | 393 | ACPI_COPY_ADDRESS(out, address32); |
1da177e4 LT |
394 | break; |
395 | ||
50eca3eb | 396 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
1da177e4 LT |
397 | |
398 | /* Simple copy for 64 bit source */ | |
399 | ||
4be44fcd LB |
400 | ACPI_MEMCPY(out, &resource->data, |
401 | sizeof(struct acpi_resource_address64)); | |
1da177e4 LT |
402 | break; |
403 | ||
1da177e4 LT |
404 | default: |
405 | return (AE_BAD_PARAMETER); | |
406 | } | |
407 | ||
408 | return (AE_OK); | |
409 | } | |
4be44fcd | 410 | |
8313524a | 411 | ACPI_EXPORT_SYMBOL(acpi_resource_to_address64) |
c51a4de8 BM |
412 | |
413 | /******************************************************************************* | |
414 | * | |
415 | * FUNCTION: acpi_get_vendor_resource | |
416 | * | |
4119532c | 417 | * PARAMETERS: device_handle - Handle for the parent device object |
ba494bee | 418 | * name - Method name for the parent resource |
4119532c | 419 | * (METHOD_NAME__CRS or METHOD_NAME__PRS) |
ba494bee | 420 | * uuid - Pointer to the UUID to be matched. |
4119532c BM |
421 | * includes both subtype and 16-byte UUID |
422 | * ret_buffer - Where the vendor resource is returned | |
c51a4de8 BM |
423 | * |
424 | * RETURN: Status | |
425 | * | |
afb1bbee | 426 | * DESCRIPTION: Walk a resource template for the specified device to find a |
c51a4de8 BM |
427 | * vendor-defined resource that matches the supplied UUID and |
428 | * UUID subtype. Returns a struct acpi_resource of type Vendor. | |
429 | * | |
430 | ******************************************************************************/ | |
c51a4de8 BM |
431 | acpi_status |
432 | acpi_get_vendor_resource(acpi_handle device_handle, | |
433 | char *name, | |
434 | struct acpi_vendor_uuid * uuid, | |
435 | struct acpi_buffer * ret_buffer) | |
436 | { | |
437 | struct acpi_vendor_walk_info info; | |
438 | acpi_status status; | |
439 | ||
440 | /* Other parameters are validated by acpi_walk_resources */ | |
441 | ||
442 | if (!uuid || !ret_buffer) { | |
443 | return (AE_BAD_PARAMETER); | |
444 | } | |
445 | ||
446 | info.uuid = uuid; | |
447 | info.buffer = ret_buffer; | |
448 | info.status = AE_NOT_EXIST; | |
449 | ||
450 | /* Walk the _CRS or _PRS resource list for this device */ | |
451 | ||
452 | status = | |
453 | acpi_walk_resources(device_handle, name, | |
454 | acpi_rs_match_vendor_resource, &info); | |
455 | if (ACPI_FAILURE(status)) { | |
456 | return (status); | |
457 | } | |
458 | ||
459 | return (info.status); | |
460 | } | |
461 | ||
8313524a BM |
462 | ACPI_EXPORT_SYMBOL(acpi_get_vendor_resource) |
463 | ||
c51a4de8 BM |
464 | /******************************************************************************* |
465 | * | |
466 | * FUNCTION: acpi_rs_match_vendor_resource | |
467 | * | |
61686124 | 468 | * PARAMETERS: acpi_walk_resource_callback |
c51a4de8 BM |
469 | * |
470 | * RETURN: Status | |
471 | * | |
472 | * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID | |
473 | * | |
474 | ******************************************************************************/ | |
c51a4de8 BM |
475 | static acpi_status |
476 | acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context) | |
477 | { | |
478 | struct acpi_vendor_walk_info *info = context; | |
479 | struct acpi_resource_vendor_typed *vendor; | |
480 | struct acpi_buffer *buffer; | |
481 | acpi_status status; | |
482 | ||
483 | /* Ignore all descriptors except Vendor */ | |
484 | ||
485 | if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) { | |
486 | return (AE_OK); | |
487 | } | |
488 | ||
489 | vendor = &resource->data.vendor_typed; | |
490 | ||
491 | /* | |
492 | * For a valid match, these conditions must hold: | |
493 | * | |
494 | * 1) Length of descriptor data must be at least as long as a UUID struct | |
495 | * 2) The UUID subtypes must match | |
496 | * 3) The UUID data must match | |
497 | */ | |
498 | if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) || | |
499 | (vendor->uuid_subtype != info->uuid->subtype) || | |
500 | (ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) { | |
501 | return (AE_OK); | |
502 | } | |
503 | ||
504 | /* Validate/Allocate/Clear caller buffer */ | |
505 | ||
506 | buffer = info->buffer; | |
507 | status = acpi_ut_initialize_buffer(buffer, resource->length); | |
508 | if (ACPI_FAILURE(status)) { | |
509 | return (status); | |
510 | } | |
511 | ||
512 | /* Found the correct resource, copy and return it */ | |
513 | ||
514 | ACPI_MEMCPY(buffer->pointer, resource, resource->length); | |
515 | buffer->length = resource->length; | |
516 | ||
517 | /* Found the desired descriptor, terminate resource walk */ | |
518 | ||
519 | info->status = AE_OK; | |
520 | return (AE_CTRL_TERMINATE); | |
521 | } | |
8313524a | 522 | |
4119532c BM |
523 | /******************************************************************************* |
524 | * | |
afb1bbee | 525 | * FUNCTION: acpi_walk_resource_buffer |
4119532c | 526 | * |
afb1bbee BM |
527 | * PARAMETERS: buffer - Formatted buffer returned by one of the |
528 | * various Get*Resource functions | |
4119532c | 529 | * user_function - Called for each resource |
ba494bee | 530 | * context - Passed to user_function |
4119532c BM |
531 | * |
532 | * RETURN: Status | |
533 | * | |
afb1bbee BM |
534 | * DESCRIPTION: Walks the input resource template. The user_function is called |
535 | * once for each resource in the list. | |
4119532c BM |
536 | * |
537 | ******************************************************************************/ | |
afb1bbee | 538 | |
4119532c | 539 | acpi_status |
afb1bbee BM |
540 | acpi_walk_resource_buffer(struct acpi_buffer * buffer, |
541 | acpi_walk_resource_callback user_function, | |
542 | void *context) | |
4119532c | 543 | { |
afb1bbee | 544 | acpi_status status = AE_OK; |
4119532c BM |
545 | struct acpi_resource *resource; |
546 | struct acpi_resource *resource_end; | |
547 | ||
afb1bbee | 548 | ACPI_FUNCTION_TRACE(acpi_walk_resource_buffer); |
4119532c BM |
549 | |
550 | /* Parameter validation */ | |
551 | ||
afb1bbee | 552 | if (!buffer || !buffer->pointer || !user_function) { |
4119532c BM |
553 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
554 | } | |
555 | ||
afb1bbee | 556 | /* Buffer contains the resource list and length */ |
4119532c | 557 | |
afb1bbee | 558 | resource = ACPI_CAST_PTR(struct acpi_resource, buffer->pointer); |
4119532c | 559 | resource_end = |
afb1bbee | 560 | ACPI_ADD_PTR(struct acpi_resource, buffer->pointer, buffer->length); |
4119532c BM |
561 | |
562 | /* Walk the resource list until the end_tag is found (or buffer end) */ | |
563 | ||
564 | while (resource < resource_end) { | |
565 | ||
566 | /* Sanity check the resource */ | |
567 | ||
568 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { | |
569 | status = AE_AML_INVALID_RESOURCE_TYPE; | |
570 | break; | |
571 | } | |
572 | ||
573 | /* Invoke the user function, abort on any error returned */ | |
574 | ||
575 | status = user_function(resource, context); | |
576 | if (ACPI_FAILURE(status)) { | |
577 | if (status == AE_CTRL_TERMINATE) { | |
578 | ||
579 | /* This is an OK termination by the user function */ | |
580 | ||
581 | status = AE_OK; | |
582 | } | |
583 | break; | |
584 | } | |
585 | ||
586 | /* end_tag indicates end-of-list */ | |
587 | ||
588 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { | |
589 | break; | |
590 | } | |
591 | ||
592 | /* Get the next resource descriptor */ | |
593 | ||
fb4e5026 | 594 | resource = ACPI_NEXT_RESOURCE(resource); |
4119532c BM |
595 | } |
596 | ||
afb1bbee BM |
597 | return_ACPI_STATUS(status); |
598 | } | |
599 | ||
600 | ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer) | |
601 | ||
602 | /******************************************************************************* | |
603 | * | |
604 | * FUNCTION: acpi_walk_resources | |
605 | * | |
606 | * PARAMETERS: device_handle - Handle to the device object for the | |
607 | * device we are querying | |
608 | * name - Method name of the resources we want. | |
609 | * (METHOD_NAME__CRS, METHOD_NAME__PRS, or | |
610 | * METHOD_NAME__AEI) | |
611 | * user_function - Called for each resource | |
612 | * context - Passed to user_function | |
613 | * | |
614 | * RETURN: Status | |
615 | * | |
616 | * DESCRIPTION: Retrieves the current or possible resource list for the | |
617 | * specified device. The user_function is called once for | |
618 | * each resource in the list. | |
619 | * | |
620 | ******************************************************************************/ | |
621 | acpi_status | |
622 | acpi_walk_resources(acpi_handle device_handle, | |
623 | char *name, | |
624 | acpi_walk_resource_callback user_function, void *context) | |
625 | { | |
626 | acpi_status status; | |
627 | struct acpi_buffer buffer; | |
628 | ||
629 | ACPI_FUNCTION_TRACE(acpi_walk_resources); | |
630 | ||
631 | /* Parameter validation */ | |
632 | ||
633 | if (!device_handle || !user_function || !name || | |
634 | (!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) && | |
635 | !ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) && | |
636 | !ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) { | |
637 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
638 | } | |
639 | ||
640 | /* Get the _CRS/_PRS/_AEI resource list */ | |
641 | ||
642 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
643 | status = acpi_rs_get_method_data(device_handle, name, &buffer); | |
644 | if (ACPI_FAILURE(status)) { | |
645 | return_ACPI_STATUS(status); | |
646 | } | |
647 | ||
648 | /* Walk the resource list and cleanup */ | |
649 | ||
650 | status = acpi_walk_resource_buffer(&buffer, user_function, context); | |
4119532c BM |
651 | ACPI_FREE(buffer.pointer); |
652 | return_ACPI_STATUS(status); | |
653 | } | |
654 | ||
655 | ACPI_EXPORT_SYMBOL(acpi_walk_resources) |