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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rsxface - Public interfaces to the resource manager | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, 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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
1da177e4 | 46 | #include <acpi/acpi.h> |
e2f7a777 LB |
47 | #include "accommon.h" |
48 | #include "acresrc.h" | |
49 | #include "acnamesp.h" | |
1da177e4 LT |
50 | |
51 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 52 | ACPI_MODULE_NAME("rsxface") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local macros for 16,32-bit to 64-bit conversion */ |
44f6c012 RM |
55 | #define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) |
56 | #define ACPI_COPY_ADDRESS(out, in) \ | |
57 | ACPI_COPY_FIELD(out, in, resource_type); \ | |
58 | ACPI_COPY_FIELD(out, in, producer_consumer); \ | |
59 | ACPI_COPY_FIELD(out, in, decode); \ | |
60 | ACPI_COPY_FIELD(out, in, min_address_fixed); \ | |
61 | ACPI_COPY_FIELD(out, in, max_address_fixed); \ | |
0897831b | 62 | ACPI_COPY_FIELD(out, in, info); \ |
a45de93e LZ |
63 | ACPI_COPY_FIELD(out, in, address.granularity); \ |
64 | ACPI_COPY_FIELD(out, in, address.minimum); \ | |
65 | ACPI_COPY_FIELD(out, in, address.maximum); \ | |
66 | ACPI_COPY_FIELD(out, in, address.translation_offset); \ | |
67 | ACPI_COPY_FIELD(out, in, address.address_length); \ | |
44f6c012 | 68 | ACPI_COPY_FIELD(out, in, resource_source); |
c51a4de8 BM |
69 | /* Local prototypes */ |
70 | static acpi_status | |
71 | acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context); | |
72 | ||
4119532c BM |
73 | static acpi_status |
74 | acpi_rs_validate_parameters(acpi_handle device_handle, | |
75 | struct acpi_buffer *buffer, | |
76 | struct acpi_namespace_node **return_node); | |
77 | ||
78 | /******************************************************************************* | |
79 | * | |
80 | * FUNCTION: acpi_rs_validate_parameters | |
81 | * | |
82 | * PARAMETERS: device_handle - Handle to a device | |
ba494bee | 83 | * buffer - Pointer to a data buffer |
4119532c BM |
84 | * return_node - Pointer to where the device node is returned |
85 | * | |
86 | * RETURN: Status | |
87 | * | |
88 | * DESCRIPTION: Common parameter validation for resource interfaces | |
89 | * | |
90 | ******************************************************************************/ | |
91 | ||
92 | static acpi_status | |
93 | acpi_rs_validate_parameters(acpi_handle device_handle, | |
94 | struct acpi_buffer *buffer, | |
95 | struct acpi_namespace_node **return_node) | |
96 | { | |
97 | acpi_status status; | |
98 | struct acpi_namespace_node *node; | |
99 | ||
100 | ACPI_FUNCTION_TRACE(rs_validate_parameters); | |
101 | ||
102 | /* | |
103 | * Must have a valid handle to an ACPI device | |
104 | */ | |
105 | if (!device_handle) { | |
106 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
107 | } | |
108 | ||
f24b664d | 109 | node = acpi_ns_validate_handle(device_handle); |
4119532c BM |
110 | if (!node) { |
111 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
112 | } | |
113 | ||
114 | if (node->type != ACPI_TYPE_DEVICE) { | |
115 | return_ACPI_STATUS(AE_TYPE); | |
116 | } | |
117 | ||
118 | /* | |
119 | * Validate the user buffer object | |
120 | * | |
121 | * if there is a non-zero buffer length we also need a valid pointer in | |
122 | * the buffer. If it's a zero buffer length, we'll be returning the | |
123 | * needed buffer size (later), so keep going. | |
124 | */ | |
125 | status = acpi_ut_validate_buffer(buffer); | |
126 | if (ACPI_FAILURE(status)) { | |
127 | return_ACPI_STATUS(status); | |
128 | } | |
129 | ||
130 | *return_node = node; | |
131 | return_ACPI_STATUS(AE_OK); | |
132 | } | |
133 | ||
1da177e4 LT |
134 | /******************************************************************************* |
135 | * | |
136 | * FUNCTION: acpi_get_irq_routing_table | |
137 | * | |
4119532c BM |
138 | * PARAMETERS: device_handle - Handle to the Bus device we are querying |
139 | * ret_buffer - Pointer to a buffer to receive the | |
1da177e4 LT |
140 | * current resources for the device |
141 | * | |
142 | * RETURN: Status | |
143 | * | |
144 | * DESCRIPTION: This function is called to get the IRQ routing table for a | |
4119532c BM |
145 | * specific bus. The caller must first acquire a handle for the |
146 | * desired bus. The routine table is placed in the buffer pointed | |
1da177e4 LT |
147 | * to by the ret_buffer variable parameter. |
148 | * | |
149 | * If the function fails an appropriate status will be returned | |
150 | * and the value of ret_buffer is undefined. | |
151 | * | |
152 | * This function attempts to execute the _PRT method contained in | |
153 | * the object indicated by the passed device_handle. | |
154 | * | |
155 | ******************************************************************************/ | |
c51a4de8 | 156 | |
1da177e4 | 157 | acpi_status |
4be44fcd LB |
158 | acpi_get_irq_routing_table(acpi_handle device_handle, |
159 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 160 | { |
4be44fcd | 161 | acpi_status status; |
4119532c | 162 | struct acpi_namespace_node *node; |
1da177e4 | 163 | |
b229cf92 | 164 | ACPI_FUNCTION_TRACE(acpi_get_irq_routing_table); |
1da177e4 | 165 | |
4119532c | 166 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 167 | |
4119532c | 168 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
169 | if (ACPI_FAILURE(status)) { |
170 | return_ACPI_STATUS(status); | |
1da177e4 LT |
171 | } |
172 | ||
4119532c | 173 | status = acpi_rs_get_prt_method_data(node, ret_buffer); |
4be44fcd | 174 | return_ACPI_STATUS(status); |
1da177e4 LT |
175 | } |
176 | ||
8313524a BM |
177 | ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table) |
178 | ||
1da177e4 LT |
179 | /******************************************************************************* |
180 | * | |
181 | * FUNCTION: acpi_get_current_resources | |
182 | * | |
4119532c | 183 | * PARAMETERS: device_handle - Handle to the device object for the |
1da177e4 | 184 | * device we are querying |
4119532c | 185 | * ret_buffer - Pointer to a buffer to receive the |
1da177e4 LT |
186 | * current resources for the device |
187 | * | |
188 | * RETURN: Status | |
189 | * | |
190 | * DESCRIPTION: This function is called to get the current resources for a | |
4119532c BM |
191 | * specific device. The caller must first acquire a handle for |
192 | * the desired device. The resource data is placed in the buffer | |
1da177e4 LT |
193 | * pointed to by the ret_buffer variable parameter. |
194 | * | |
195 | * If the function fails an appropriate status will be returned | |
196 | * and the value of ret_buffer is undefined. | |
197 | * | |
198 | * This function attempts to execute the _CRS method contained in | |
199 | * the object indicated by the passed device_handle. | |
200 | * | |
201 | ******************************************************************************/ | |
1da177e4 | 202 | acpi_status |
4be44fcd LB |
203 | acpi_get_current_resources(acpi_handle device_handle, |
204 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 205 | { |
4be44fcd | 206 | acpi_status status; |
4119532c | 207 | struct acpi_namespace_node *node; |
1da177e4 | 208 | |
b229cf92 | 209 | ACPI_FUNCTION_TRACE(acpi_get_current_resources); |
1da177e4 | 210 | |
4119532c | 211 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 212 | |
4119532c | 213 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
214 | if (ACPI_FAILURE(status)) { |
215 | return_ACPI_STATUS(status); | |
1da177e4 LT |
216 | } |
217 | ||
4119532c | 218 | status = acpi_rs_get_crs_method_data(node, ret_buffer); |
4be44fcd | 219 | return_ACPI_STATUS(status); |
1da177e4 | 220 | } |
1da177e4 | 221 | |
8313524a | 222 | ACPI_EXPORT_SYMBOL(acpi_get_current_resources) |
8313524a | 223 | #ifdef ACPI_FUTURE_USAGE |
1da177e4 LT |
224 | /******************************************************************************* |
225 | * | |
226 | * FUNCTION: acpi_get_possible_resources | |
227 | * | |
4119532c | 228 | * PARAMETERS: device_handle - Handle to the device object for the |
1da177e4 | 229 | * device we are querying |
4119532c | 230 | * ret_buffer - Pointer to a buffer to receive the |
1da177e4 LT |
231 | * resources for the device |
232 | * | |
233 | * RETURN: Status | |
234 | * | |
235 | * DESCRIPTION: This function is called to get a list of the possible resources | |
4119532c BM |
236 | * for a specific device. The caller must first acquire a handle |
237 | * for the desired device. The resource data is placed in the | |
1da177e4 LT |
238 | * buffer pointed to by the ret_buffer variable. |
239 | * | |
240 | * If the function fails an appropriate status will be returned | |
241 | * and the value of ret_buffer is undefined. | |
242 | * | |
243 | ******************************************************************************/ | |
1da177e4 | 244 | acpi_status |
4be44fcd LB |
245 | acpi_get_possible_resources(acpi_handle device_handle, |
246 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 247 | { |
4be44fcd | 248 | acpi_status status; |
4119532c | 249 | struct acpi_namespace_node *node; |
1da177e4 | 250 | |
b229cf92 | 251 | ACPI_FUNCTION_TRACE(acpi_get_possible_resources); |
1da177e4 | 252 | |
4119532c | 253 | /* Validate parameters then dispatch to internal routine */ |
1da177e4 | 254 | |
4119532c | 255 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
4be44fcd LB |
256 | if (ACPI_FAILURE(status)) { |
257 | return_ACPI_STATUS(status); | |
1da177e4 LT |
258 | } |
259 | ||
4119532c | 260 | status = acpi_rs_get_prs_method_data(node, ret_buffer); |
4be44fcd | 261 | return_ACPI_STATUS(status); |
1da177e4 | 262 | } |
1da177e4 | 263 | |
8313524a | 264 | ACPI_EXPORT_SYMBOL(acpi_get_possible_resources) |
4be44fcd | 265 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
266 | /******************************************************************************* |
267 | * | |
268 | * FUNCTION: acpi_set_current_resources | |
269 | * | |
4119532c BM |
270 | * PARAMETERS: device_handle - Handle to the device object for the |
271 | * device we are setting resources | |
272 | * in_buffer - Pointer to a buffer containing the | |
1da177e4 LT |
273 | * resources to be set for the device |
274 | * | |
275 | * RETURN: Status | |
276 | * | |
277 | * DESCRIPTION: This function is called to set the current resources for a | |
4119532c BM |
278 | * specific device. The caller must first acquire a handle for |
279 | * the desired device. The resource data is passed to the routine | |
1da177e4 LT |
280 | * the buffer pointed to by the in_buffer variable. |
281 | * | |
282 | ******************************************************************************/ | |
1da177e4 | 283 | acpi_status |
4be44fcd LB |
284 | acpi_set_current_resources(acpi_handle device_handle, |
285 | struct acpi_buffer *in_buffer) | |
1da177e4 | 286 | { |
4be44fcd | 287 | acpi_status status; |
4119532c | 288 | struct acpi_namespace_node *node; |
1da177e4 | 289 | |
b229cf92 | 290 | ACPI_FUNCTION_TRACE(acpi_set_current_resources); |
1da177e4 | 291 | |
4119532c | 292 | /* Validate the buffer, don't allow zero length */ |
44f6c012 | 293 | |
4119532c | 294 | if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) { |
4be44fcd | 295 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
296 | } |
297 | ||
4119532c BM |
298 | /* Validate parameters then dispatch to internal routine */ |
299 | ||
300 | status = acpi_rs_validate_parameters(device_handle, in_buffer, &node); | |
301 | if (ACPI_FAILURE(status)) { | |
302 | return_ACPI_STATUS(status); | |
303 | } | |
304 | ||
305 | status = acpi_rs_set_srs_method_data(node, in_buffer); | |
4be44fcd | 306 | return_ACPI_STATUS(status); |
1da177e4 | 307 | } |
1da177e4 | 308 | |
8313524a | 309 | ACPI_EXPORT_SYMBOL(acpi_set_current_resources) |
1da177e4 | 310 | |
a91cdde2 BM |
311 | /******************************************************************************* |
312 | * | |
313 | * FUNCTION: acpi_get_event_resources | |
314 | * | |
315 | * PARAMETERS: device_handle - Handle to the device object for the | |
316 | * device we are getting resources | |
317 | * in_buffer - Pointer to a buffer containing the | |
318 | * resources to be set for the device | |
319 | * | |
320 | * RETURN: Status | |
321 | * | |
322 | * DESCRIPTION: This function is called to get the event resources for a | |
323 | * specific device. The caller must first acquire a handle for | |
324 | * the desired device. The resource data is passed to the routine | |
325 | * the buffer pointed to by the in_buffer variable. Uses the | |
326 | * _AEI method. | |
327 | * | |
328 | ******************************************************************************/ | |
329 | acpi_status | |
330 | acpi_get_event_resources(acpi_handle device_handle, | |
331 | struct acpi_buffer *ret_buffer) | |
332 | { | |
333 | acpi_status status; | |
334 | struct acpi_namespace_node *node; | |
335 | ||
336 | ACPI_FUNCTION_TRACE(acpi_get_event_resources); | |
337 | ||
338 | /* Validate parameters then dispatch to internal routine */ | |
339 | ||
340 | status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); | |
341 | if (ACPI_FAILURE(status)) { | |
342 | return_ACPI_STATUS(status); | |
343 | } | |
344 | ||
345 | status = acpi_rs_get_aei_method_data(node, ret_buffer); | |
346 | return_ACPI_STATUS(status); | |
347 | } | |
348 | ||
349 | ACPI_EXPORT_SYMBOL(acpi_get_event_resources) | |
350 | ||
1da177e4 LT |
351 | /****************************************************************************** |
352 | * | |
353 | * FUNCTION: acpi_resource_to_address64 | |
354 | * | |
ba494bee BM |
355 | * PARAMETERS: resource - Pointer to a resource |
356 | * out - Pointer to the users's return buffer | |
4119532c | 357 | * (a struct acpi_resource_address64) |
1da177e4 LT |
358 | * |
359 | * RETURN: Status | |
360 | * | |
361 | * DESCRIPTION: If the resource is an address16, address32, or address64, | |
4119532c | 362 | * copy it to the address64 return buffer. This saves the |
1da177e4 LT |
363 | * caller from having to duplicate code for different-sized |
364 | * addresses. | |
365 | * | |
366 | ******************************************************************************/ | |
1da177e4 | 367 | acpi_status |
4be44fcd LB |
368 | acpi_resource_to_address64(struct acpi_resource *resource, |
369 | struct acpi_resource_address64 *out) | |
1da177e4 | 370 | { |
4be44fcd LB |
371 | struct acpi_resource_address16 *address16; |
372 | struct acpi_resource_address32 *address32; | |
1da177e4 | 373 | |
c51a4de8 BM |
374 | if (!resource || !out) { |
375 | return (AE_BAD_PARAMETER); | |
376 | } | |
377 | ||
378 | /* Convert 16 or 32 address descriptor to 64 */ | |
379 | ||
bda663d3 | 380 | switch (resource->type) { |
50eca3eb | 381 | case ACPI_RESOURCE_TYPE_ADDRESS16: |
1da177e4 | 382 | |
ba9c3f55 BM |
383 | address16 = |
384 | ACPI_CAST_PTR(struct acpi_resource_address16, | |
385 | &resource->data); | |
4be44fcd | 386 | ACPI_COPY_ADDRESS(out, address16); |
1da177e4 LT |
387 | break; |
388 | ||
50eca3eb | 389 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
1da177e4 | 390 | |
ba9c3f55 BM |
391 | address32 = |
392 | ACPI_CAST_PTR(struct acpi_resource_address32, | |
393 | &resource->data); | |
4be44fcd | 394 | ACPI_COPY_ADDRESS(out, address32); |
1da177e4 LT |
395 | break; |
396 | ||
50eca3eb | 397 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
1da177e4 LT |
398 | |
399 | /* Simple copy for 64 bit source */ | |
400 | ||
4be44fcd LB |
401 | ACPI_MEMCPY(out, &resource->data, |
402 | sizeof(struct acpi_resource_address64)); | |
1da177e4 LT |
403 | break; |
404 | ||
1da177e4 | 405 | default: |
1d1ea1b7 | 406 | |
1da177e4 LT |
407 | return (AE_BAD_PARAMETER); |
408 | } | |
409 | ||
410 | return (AE_OK); | |
411 | } | |
4be44fcd | 412 | |
8313524a | 413 | ACPI_EXPORT_SYMBOL(acpi_resource_to_address64) |
c51a4de8 BM |
414 | |
415 | /******************************************************************************* | |
416 | * | |
417 | * FUNCTION: acpi_get_vendor_resource | |
418 | * | |
4119532c | 419 | * PARAMETERS: device_handle - Handle for the parent device object |
ba494bee | 420 | * name - Method name for the parent resource |
4119532c | 421 | * (METHOD_NAME__CRS or METHOD_NAME__PRS) |
ba494bee | 422 | * uuid - Pointer to the UUID to be matched. |
4119532c BM |
423 | * includes both subtype and 16-byte UUID |
424 | * ret_buffer - Where the vendor resource is returned | |
c51a4de8 BM |
425 | * |
426 | * RETURN: Status | |
427 | * | |
afb1bbee | 428 | * DESCRIPTION: Walk a resource template for the specified device to find a |
c51a4de8 BM |
429 | * vendor-defined resource that matches the supplied UUID and |
430 | * UUID subtype. Returns a struct acpi_resource of type Vendor. | |
431 | * | |
432 | ******************************************************************************/ | |
c51a4de8 BM |
433 | acpi_status |
434 | acpi_get_vendor_resource(acpi_handle device_handle, | |
435 | char *name, | |
436 | struct acpi_vendor_uuid * uuid, | |
437 | struct acpi_buffer * ret_buffer) | |
438 | { | |
439 | struct acpi_vendor_walk_info info; | |
440 | acpi_status status; | |
441 | ||
442 | /* Other parameters are validated by acpi_walk_resources */ | |
443 | ||
444 | if (!uuid || !ret_buffer) { | |
445 | return (AE_BAD_PARAMETER); | |
446 | } | |
447 | ||
448 | info.uuid = uuid; | |
449 | info.buffer = ret_buffer; | |
450 | info.status = AE_NOT_EXIST; | |
451 | ||
452 | /* Walk the _CRS or _PRS resource list for this device */ | |
453 | ||
454 | status = | |
455 | acpi_walk_resources(device_handle, name, | |
456 | acpi_rs_match_vendor_resource, &info); | |
457 | if (ACPI_FAILURE(status)) { | |
458 | return (status); | |
459 | } | |
460 | ||
461 | return (info.status); | |
462 | } | |
463 | ||
8313524a BM |
464 | ACPI_EXPORT_SYMBOL(acpi_get_vendor_resource) |
465 | ||
c51a4de8 BM |
466 | /******************************************************************************* |
467 | * | |
468 | * FUNCTION: acpi_rs_match_vendor_resource | |
469 | * | |
61686124 | 470 | * PARAMETERS: acpi_walk_resource_callback |
c51a4de8 BM |
471 | * |
472 | * RETURN: Status | |
473 | * | |
474 | * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID | |
475 | * | |
476 | ******************************************************************************/ | |
c51a4de8 BM |
477 | static acpi_status |
478 | acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context) | |
479 | { | |
480 | struct acpi_vendor_walk_info *info = context; | |
481 | struct acpi_resource_vendor_typed *vendor; | |
482 | struct acpi_buffer *buffer; | |
483 | acpi_status status; | |
484 | ||
485 | /* Ignore all descriptors except Vendor */ | |
486 | ||
487 | if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) { | |
488 | return (AE_OK); | |
489 | } | |
490 | ||
491 | vendor = &resource->data.vendor_typed; | |
492 | ||
493 | /* | |
494 | * For a valid match, these conditions must hold: | |
495 | * | |
496 | * 1) Length of descriptor data must be at least as long as a UUID struct | |
497 | * 2) The UUID subtypes must match | |
498 | * 3) The UUID data must match | |
499 | */ | |
500 | if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) || | |
501 | (vendor->uuid_subtype != info->uuid->subtype) || | |
502 | (ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) { | |
503 | return (AE_OK); | |
504 | } | |
505 | ||
506 | /* Validate/Allocate/Clear caller buffer */ | |
507 | ||
508 | buffer = info->buffer; | |
509 | status = acpi_ut_initialize_buffer(buffer, resource->length); | |
510 | if (ACPI_FAILURE(status)) { | |
511 | return (status); | |
512 | } | |
513 | ||
514 | /* Found the correct resource, copy and return it */ | |
515 | ||
516 | ACPI_MEMCPY(buffer->pointer, resource, resource->length); | |
517 | buffer->length = resource->length; | |
518 | ||
519 | /* Found the desired descriptor, terminate resource walk */ | |
520 | ||
521 | info->status = AE_OK; | |
522 | return (AE_CTRL_TERMINATE); | |
523 | } | |
8313524a | 524 | |
4119532c BM |
525 | /******************************************************************************* |
526 | * | |
afb1bbee | 527 | * FUNCTION: acpi_walk_resource_buffer |
4119532c | 528 | * |
afb1bbee BM |
529 | * PARAMETERS: buffer - Formatted buffer returned by one of the |
530 | * various Get*Resource functions | |
4119532c | 531 | * user_function - Called for each resource |
ba494bee | 532 | * context - Passed to user_function |
4119532c BM |
533 | * |
534 | * RETURN: Status | |
535 | * | |
afb1bbee BM |
536 | * DESCRIPTION: Walks the input resource template. The user_function is called |
537 | * once for each resource in the list. | |
4119532c BM |
538 | * |
539 | ******************************************************************************/ | |
afb1bbee | 540 | |
4119532c | 541 | acpi_status |
afb1bbee BM |
542 | acpi_walk_resource_buffer(struct acpi_buffer * buffer, |
543 | acpi_walk_resource_callback user_function, | |
544 | void *context) | |
4119532c | 545 | { |
afb1bbee | 546 | acpi_status status = AE_OK; |
4119532c BM |
547 | struct acpi_resource *resource; |
548 | struct acpi_resource *resource_end; | |
549 | ||
afb1bbee | 550 | ACPI_FUNCTION_TRACE(acpi_walk_resource_buffer); |
4119532c BM |
551 | |
552 | /* Parameter validation */ | |
553 | ||
afb1bbee | 554 | if (!buffer || !buffer->pointer || !user_function) { |
4119532c BM |
555 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
556 | } | |
557 | ||
afb1bbee | 558 | /* Buffer contains the resource list and length */ |
4119532c | 559 | |
afb1bbee | 560 | resource = ACPI_CAST_PTR(struct acpi_resource, buffer->pointer); |
4119532c | 561 | resource_end = |
afb1bbee | 562 | ACPI_ADD_PTR(struct acpi_resource, buffer->pointer, buffer->length); |
4119532c BM |
563 | |
564 | /* Walk the resource list until the end_tag is found (or buffer end) */ | |
565 | ||
566 | while (resource < resource_end) { | |
567 | ||
c13085e5 | 568 | /* Sanity check the resource type */ |
4119532c BM |
569 | |
570 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { | |
571 | status = AE_AML_INVALID_RESOURCE_TYPE; | |
572 | break; | |
573 | } | |
574 | ||
c13085e5 BM |
575 | /* Sanity check the length. It must not be zero, or we loop forever */ |
576 | ||
577 | if (!resource->length) { | |
578 | return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); | |
579 | } | |
580 | ||
4119532c BM |
581 | /* Invoke the user function, abort on any error returned */ |
582 | ||
583 | status = user_function(resource, context); | |
584 | if (ACPI_FAILURE(status)) { | |
585 | if (status == AE_CTRL_TERMINATE) { | |
586 | ||
587 | /* This is an OK termination by the user function */ | |
588 | ||
589 | status = AE_OK; | |
590 | } | |
591 | break; | |
592 | } | |
593 | ||
594 | /* end_tag indicates end-of-list */ | |
595 | ||
596 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { | |
597 | break; | |
598 | } | |
599 | ||
600 | /* Get the next resource descriptor */ | |
601 | ||
fb4e5026 | 602 | resource = ACPI_NEXT_RESOURCE(resource); |
4119532c BM |
603 | } |
604 | ||
afb1bbee BM |
605 | return_ACPI_STATUS(status); |
606 | } | |
607 | ||
608 | ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer) | |
609 | ||
610 | /******************************************************************************* | |
611 | * | |
612 | * FUNCTION: acpi_walk_resources | |
613 | * | |
614 | * PARAMETERS: device_handle - Handle to the device object for the | |
615 | * device we are querying | |
616 | * name - Method name of the resources we want. | |
617 | * (METHOD_NAME__CRS, METHOD_NAME__PRS, or | |
618 | * METHOD_NAME__AEI) | |
619 | * user_function - Called for each resource | |
620 | * context - Passed to user_function | |
621 | * | |
622 | * RETURN: Status | |
623 | * | |
624 | * DESCRIPTION: Retrieves the current or possible resource list for the | |
625 | * specified device. The user_function is called once for | |
626 | * each resource in the list. | |
627 | * | |
628 | ******************************************************************************/ | |
629 | acpi_status | |
630 | acpi_walk_resources(acpi_handle device_handle, | |
631 | char *name, | |
632 | acpi_walk_resource_callback user_function, void *context) | |
633 | { | |
634 | acpi_status status; | |
635 | struct acpi_buffer buffer; | |
636 | ||
637 | ACPI_FUNCTION_TRACE(acpi_walk_resources); | |
638 | ||
639 | /* Parameter validation */ | |
640 | ||
641 | if (!device_handle || !user_function || !name || | |
642 | (!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) && | |
643 | !ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) && | |
644 | !ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) { | |
645 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
646 | } | |
647 | ||
648 | /* Get the _CRS/_PRS/_AEI resource list */ | |
649 | ||
650 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
651 | status = acpi_rs_get_method_data(device_handle, name, &buffer); | |
652 | if (ACPI_FAILURE(status)) { | |
653 | return_ACPI_STATUS(status); | |
654 | } | |
655 | ||
656 | /* Walk the resource list and cleanup */ | |
657 | ||
658 | status = acpi_walk_resource_buffer(&buffer, user_function, context); | |
4119532c BM |
659 | ACPI_FREE(buffer.pointer); |
660 | return_ACPI_STATUS(status); | |
661 | } | |
662 | ||
663 | ACPI_EXPORT_SYMBOL(acpi_walk_resources) |