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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rsutils - Utilities for the resource manager | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acnamesp.h" | |
47 | #include "acresrc.h" | |
1da177e4 | 48 | |
1da177e4 | 49 | #define _COMPONENT ACPI_RESOURCES |
4be44fcd | 50 | ACPI_MODULE_NAME("rsutils") |
1da177e4 | 51 | |
0897831b BM |
52 | /******************************************************************************* |
53 | * | |
54 | * FUNCTION: acpi_rs_decode_bitmask | |
55 | * | |
56 | * PARAMETERS: Mask - Bitmask to decode | |
57 | * List - Where the converted list is returned | |
58 | * | |
59 | * RETURN: Count of bits set (length of list) | |
60 | * | |
61 | * DESCRIPTION: Convert a bit mask into a list of values | |
62 | * | |
63 | ******************************************************************************/ | |
64 | u8 acpi_rs_decode_bitmask(u16 mask, u8 * list) | |
65 | { | |
67a119f9 | 66 | u8 i; |
0897831b BM |
67 | u8 bit_count; |
68 | ||
96db255c BM |
69 | ACPI_FUNCTION_ENTRY(); |
70 | ||
0897831b BM |
71 | /* Decode the mask bits */ |
72 | ||
73 | for (i = 0, bit_count = 0; mask; i++) { | |
74 | if (mask & 0x0001) { | |
67a119f9 | 75 | list[bit_count] = i; |
0897831b BM |
76 | bit_count++; |
77 | } | |
78 | ||
79 | mask >>= 1; | |
80 | } | |
81 | ||
82 | return (bit_count); | |
83 | } | |
84 | ||
85 | /******************************************************************************* | |
86 | * | |
87 | * FUNCTION: acpi_rs_encode_bitmask | |
88 | * | |
89 | * PARAMETERS: List - List of values to encode | |
90 | * Count - Length of list | |
91 | * | |
92 | * RETURN: Encoded bitmask | |
93 | * | |
94 | * DESCRIPTION: Convert a list of values to an encoded bitmask | |
95 | * | |
96 | ******************************************************************************/ | |
97 | ||
98 | u16 acpi_rs_encode_bitmask(u8 * list, u8 count) | |
99 | { | |
67a119f9 BM |
100 | u32 i; |
101 | u16 mask; | |
0897831b | 102 | |
96db255c BM |
103 | ACPI_FUNCTION_ENTRY(); |
104 | ||
0897831b BM |
105 | /* Encode the list into a single bitmask */ |
106 | ||
107 | for (i = 0, mask = 0; i < count; i++) { | |
1d18c058 | 108 | mask |= (0x1 << list[i]); |
0897831b BM |
109 | } |
110 | ||
67a119f9 | 111 | return mask; |
0897831b BM |
112 | } |
113 | ||
50eca3eb BM |
114 | /******************************************************************************* |
115 | * | |
116 | * FUNCTION: acpi_rs_move_data | |
117 | * | |
118 | * PARAMETERS: Destination - Pointer to the destination descriptor | |
119 | * Source - Pointer to the source descriptor | |
120 | * item_count - How many items to move | |
121 | * move_type - Byte width | |
122 | * | |
123 | * RETURN: None | |
124 | * | |
125 | * DESCRIPTION: Move multiple data items from one descriptor to another. Handles | |
126 | * alignment issues and endian issues if necessary, as configured | |
127 | * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) | |
128 | * | |
129 | ******************************************************************************/ | |
0897831b | 130 | |
50eca3eb BM |
131 | void |
132 | acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type) | |
133 | { | |
67a119f9 | 134 | u32 i; |
50eca3eb | 135 | |
96db255c BM |
136 | ACPI_FUNCTION_ENTRY(); |
137 | ||
50eca3eb BM |
138 | /* One move per item */ |
139 | ||
140 | for (i = 0; i < item_count; i++) { | |
141 | switch (move_type) { | |
0897831b BM |
142 | /* |
143 | * For the 8-bit case, we can perform the move all at once | |
144 | * since there are no alignment or endian issues | |
145 | */ | |
146 | case ACPI_RSC_MOVE8: | |
147 | ACPI_MEMCPY(destination, source, item_count); | |
148 | return; | |
50eca3eb | 149 | |
0897831b BM |
150 | /* |
151 | * 16-, 32-, and 64-bit cases must use the move macros that perform | |
152 | * endian conversion and/or accomodate hardware that cannot perform | |
153 | * misaligned memory transfers | |
154 | */ | |
155 | case ACPI_RSC_MOVE16: | |
c51a4de8 BM |
156 | ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i], |
157 | &ACPI_CAST_PTR(u16, source)[i]); | |
50eca3eb BM |
158 | break; |
159 | ||
0897831b | 160 | case ACPI_RSC_MOVE32: |
c51a4de8 BM |
161 | ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i], |
162 | &ACPI_CAST_PTR(u32, source)[i]); | |
50eca3eb BM |
163 | break; |
164 | ||
0897831b | 165 | case ACPI_RSC_MOVE64: |
c51a4de8 BM |
166 | ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i], |
167 | &ACPI_CAST_PTR(u64, source)[i]); | |
50eca3eb BM |
168 | break; |
169 | ||
170 | default: | |
171 | return; | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
50eca3eb BM |
176 | /******************************************************************************* |
177 | * | |
0897831b | 178 | * FUNCTION: acpi_rs_set_resource_length |
50eca3eb | 179 | * |
0897831b BM |
180 | * PARAMETERS: total_length - Length of the AML descriptor, including |
181 | * the header and length fields. | |
182 | * Aml - Pointer to the raw AML descriptor | |
50eca3eb | 183 | * |
0897831b | 184 | * RETURN: None |
50eca3eb | 185 | * |
0897831b BM |
186 | * DESCRIPTION: Set the resource_length field of an AML |
187 | * resource descriptor, both Large and Small descriptors are | |
188 | * supported automatically. Note: Descriptor Type field must | |
189 | * be valid. | |
50eca3eb BM |
190 | * |
191 | ******************************************************************************/ | |
192 | ||
0897831b BM |
193 | void |
194 | acpi_rs_set_resource_length(acpi_rsdesc_size total_length, | |
195 | union aml_resource *aml) | |
50eca3eb | 196 | { |
0897831b | 197 | acpi_rs_length resource_length; |
50eca3eb BM |
198 | |
199 | ACPI_FUNCTION_ENTRY(); | |
200 | ||
96db255c | 201 | /* Length is the total descriptor length minus the header length */ |
50eca3eb | 202 | |
96db255c BM |
203 | resource_length = (acpi_rs_length) |
204 | (total_length - acpi_ut_get_resource_header_length(aml)); | |
50eca3eb | 205 | |
96db255c | 206 | /* Length is stored differently for large and small descriptors */ |
0897831b | 207 | |
96db255c | 208 | if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) { |
52fc0b02 | 209 | |
96db255c | 210 | /* Large descriptor -- bytes 1-2 contain the 16-bit length */ |
50eca3eb | 211 | |
0897831b BM |
212 | ACPI_MOVE_16_TO_16(&aml->large_header.resource_length, |
213 | &resource_length); | |
50eca3eb | 214 | } else { |
96db255c | 215 | /* Small descriptor -- bits 2:0 of byte 0 contain the length */ |
50eca3eb | 216 | |
0897831b | 217 | aml->small_header.descriptor_type = (u8) |
50eca3eb | 218 | |
0897831b BM |
219 | /* Clear any existing length, preserving descriptor type bits */ |
220 | ((aml->small_header. | |
221 | descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) | |
50eca3eb | 222 | |
0897831b | 223 | | resource_length); |
50eca3eb | 224 | } |
50eca3eb BM |
225 | } |
226 | ||
227 | /******************************************************************************* | |
228 | * | |
229 | * FUNCTION: acpi_rs_set_resource_header | |
230 | * | |
231 | * PARAMETERS: descriptor_type - Byte to be inserted as the type | |
232 | * total_length - Length of the AML descriptor, including | |
233 | * the header and length fields. | |
234 | * Aml - Pointer to the raw AML descriptor | |
235 | * | |
236 | * RETURN: None | |
237 | * | |
238 | * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML | |
239 | * resource descriptor, both Large and Small descriptors are | |
240 | * supported automatically | |
241 | * | |
242 | ******************************************************************************/ | |
243 | ||
244 | void | |
245 | acpi_rs_set_resource_header(u8 descriptor_type, | |
0897831b BM |
246 | acpi_rsdesc_size total_length, |
247 | union aml_resource *aml) | |
50eca3eb | 248 | { |
50eca3eb BM |
249 | ACPI_FUNCTION_ENTRY(); |
250 | ||
96db255c | 251 | /* Set the Resource Type */ |
50eca3eb BM |
252 | |
253 | aml->small_header.descriptor_type = descriptor_type; | |
254 | ||
0897831b | 255 | /* Set the Resource Length */ |
50eca3eb | 256 | |
0897831b | 257 | acpi_rs_set_resource_length(total_length, aml); |
50eca3eb BM |
258 | } |
259 | ||
260 | /******************************************************************************* | |
261 | * | |
262 | * FUNCTION: acpi_rs_strcpy | |
263 | * | |
264 | * PARAMETERS: Destination - Pointer to the destination string | |
265 | * Source - Pointer to the source string | |
266 | * | |
267 | * RETURN: String length, including NULL terminator | |
268 | * | |
269 | * DESCRIPTION: Local string copy that returns the string length, saving a | |
270 | * strcpy followed by a strlen. | |
271 | * | |
272 | ******************************************************************************/ | |
273 | ||
274 | static u16 acpi_rs_strcpy(char *destination, char *source) | |
275 | { | |
276 | u16 i; | |
277 | ||
278 | ACPI_FUNCTION_ENTRY(); | |
279 | ||
280 | for (i = 0; source[i]; i++) { | |
281 | destination[i] = source[i]; | |
282 | } | |
283 | ||
284 | destination[i] = 0; | |
285 | ||
286 | /* Return string length including the NULL terminator */ | |
287 | ||
288 | return ((u16) (i + 1)); | |
289 | } | |
290 | ||
291 | /******************************************************************************* | |
292 | * | |
293 | * FUNCTION: acpi_rs_get_resource_source | |
294 | * | |
295 | * PARAMETERS: resource_length - Length field of the descriptor | |
296 | * minimum_length - Minimum length of the descriptor (minus | |
297 | * any optional fields) | |
298 | * resource_source - Where the resource_source is returned | |
299 | * Aml - Pointer to the raw AML descriptor | |
300 | * string_ptr - (optional) where to store the actual | |
301 | * resource_source string | |
302 | * | |
ea936b78 BM |
303 | * RETURN: Length of the string plus NULL terminator, rounded up to native |
304 | * word boundary | |
50eca3eb BM |
305 | * |
306 | * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor | |
307 | * to an internal resource descriptor | |
308 | * | |
309 | ******************************************************************************/ | |
310 | ||
0897831b BM |
311 | acpi_rs_length |
312 | acpi_rs_get_resource_source(acpi_rs_length resource_length, | |
313 | acpi_rs_length minimum_length, | |
50eca3eb BM |
314 | struct acpi_resource_source * resource_source, |
315 | union aml_resource * aml, char *string_ptr) | |
316 | { | |
0897831b | 317 | acpi_rsdesc_size total_length; |
50eca3eb BM |
318 | u8 *aml_resource_source; |
319 | ||
320 | ACPI_FUNCTION_ENTRY(); | |
321 | ||
322 | total_length = | |
323 | resource_length + sizeof(struct aml_resource_large_header); | |
c51a4de8 | 324 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
50eca3eb BM |
325 | |
326 | /* | |
327 | * resource_source is present if the length of the descriptor is longer than | |
328 | * the minimum length. | |
329 | * | |
330 | * Note: Some resource descriptors will have an additional null, so | |
331 | * we add 1 to the minimum length. | |
332 | */ | |
0897831b | 333 | if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) { |
52fc0b02 | 334 | |
50eca3eb BM |
335 | /* Get the resource_source_index */ |
336 | ||
337 | resource_source->index = aml_resource_source[0]; | |
338 | ||
339 | resource_source->string_ptr = string_ptr; | |
340 | if (!string_ptr) { | |
341 | /* | |
342 | * String destination pointer is not specified; Set the String | |
343 | * pointer to the end of the current resource_source structure. | |
344 | */ | |
c51a4de8 BM |
345 | resource_source->string_ptr = |
346 | ACPI_ADD_PTR(char, resource_source, | |
347 | sizeof(struct acpi_resource_source)); | |
50eca3eb BM |
348 | } |
349 | ||
0897831b | 350 | /* |
ea936b78 BM |
351 | * In order for the Resource length to be a multiple of the native |
352 | * word, calculate the length of the string (+1 for NULL terminator) | |
353 | * and expand to the next word multiple. | |
0897831b BM |
354 | * |
355 | * Zero the entire area of the buffer. | |
356 | */ | |
fd350943 LB |
357 | total_length = (u32) |
358 | ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + 1; | |
ea936b78 | 359 | total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length); |
52fc0b02 | 360 | |
0897831b BM |
361 | ACPI_MEMSET(resource_source->string_ptr, 0, total_length); |
362 | ||
50eca3eb BM |
363 | /* Copy the resource_source string to the destination */ |
364 | ||
365 | resource_source->string_length = | |
366 | acpi_rs_strcpy(resource_source->string_ptr, | |
52fc0b02 BM |
367 | ACPI_CAST_PTR(char, |
368 | &aml_resource_source[1])); | |
50eca3eb | 369 | |
0897831b | 370 | return ((acpi_rs_length) total_length); |
50eca3eb | 371 | } |
96db255c BM |
372 | |
373 | /* resource_source is not present */ | |
374 | ||
375 | resource_source->index = 0; | |
376 | resource_source->string_length = 0; | |
377 | resource_source->string_ptr = NULL; | |
378 | return (0); | |
50eca3eb BM |
379 | } |
380 | ||
381 | /******************************************************************************* | |
382 | * | |
383 | * FUNCTION: acpi_rs_set_resource_source | |
384 | * | |
385 | * PARAMETERS: Aml - Pointer to the raw AML descriptor | |
386 | * minimum_length - Minimum length of the descriptor (minus | |
387 | * any optional fields) | |
388 | * resource_source - Internal resource_source | |
389 | ||
390 | * | |
391 | * RETURN: Total length of the AML descriptor | |
392 | * | |
0897831b | 393 | * DESCRIPTION: Convert an optional resource_source from internal format to a |
50eca3eb BM |
394 | * raw AML resource descriptor |
395 | * | |
396 | ******************************************************************************/ | |
397 | ||
0897831b | 398 | acpi_rsdesc_size |
50eca3eb | 399 | acpi_rs_set_resource_source(union aml_resource * aml, |
0897831b | 400 | acpi_rs_length minimum_length, |
50eca3eb BM |
401 | struct acpi_resource_source * resource_source) |
402 | { | |
403 | u8 *aml_resource_source; | |
0897831b | 404 | acpi_rsdesc_size descriptor_length; |
50eca3eb BM |
405 | |
406 | ACPI_FUNCTION_ENTRY(); | |
407 | ||
408 | descriptor_length = minimum_length; | |
409 | ||
410 | /* Non-zero string length indicates presence of a resource_source */ | |
411 | ||
412 | if (resource_source->string_length) { | |
52fc0b02 | 413 | |
50eca3eb BM |
414 | /* Point to the end of the AML descriptor */ |
415 | ||
c51a4de8 | 416 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
50eca3eb BM |
417 | |
418 | /* Copy the resource_source_index */ | |
419 | ||
420 | aml_resource_source[0] = (u8) resource_source->index; | |
421 | ||
422 | /* Copy the resource_source string */ | |
423 | ||
52fc0b02 | 424 | ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]), |
50eca3eb BM |
425 | resource_source->string_ptr); |
426 | ||
427 | /* | |
428 | * Add the length of the string (+ 1 for null terminator) to the | |
429 | * final descriptor length | |
430 | */ | |
431 | descriptor_length += | |
0897831b | 432 | ((acpi_rsdesc_size) resource_source->string_length + 1); |
50eca3eb BM |
433 | } |
434 | ||
435 | /* Return the new total length of the AML descriptor */ | |
436 | ||
437 | return (descriptor_length); | |
438 | } | |
439 | ||
1da177e4 LT |
440 | /******************************************************************************* |
441 | * | |
442 | * FUNCTION: acpi_rs_get_prt_method_data | |
443 | * | |
4119532c | 444 | * PARAMETERS: Node - Device node |
52fc0b02 BM |
445 | * ret_buffer - Pointer to a buffer structure for the |
446 | * results | |
1da177e4 LT |
447 | * |
448 | * RETURN: Status | |
449 | * | |
450 | * DESCRIPTION: This function is called to get the _PRT value of an object | |
451 | * contained in an object specified by the handle passed in | |
452 | * | |
453 | * If the function fails an appropriate status will be returned | |
454 | * and the contents of the callers buffer is undefined. | |
455 | * | |
456 | ******************************************************************************/ | |
50eca3eb | 457 | |
1da177e4 | 458 | acpi_status |
4119532c BM |
459 | acpi_rs_get_prt_method_data(struct acpi_namespace_node * node, |
460 | struct acpi_buffer * ret_buffer) | |
1da177e4 | 461 | { |
4be44fcd LB |
462 | union acpi_operand_object *obj_desc; |
463 | acpi_status status; | |
1da177e4 | 464 | |
b229cf92 | 465 | ACPI_FUNCTION_TRACE(rs_get_prt_method_data); |
1da177e4 LT |
466 | |
467 | /* Parameters guaranteed valid by caller */ | |
468 | ||
44f6c012 RM |
469 | /* Execute the method, no parameters */ |
470 | ||
4119532c | 471 | status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT, |
4be44fcd LB |
472 | ACPI_BTYPE_PACKAGE, &obj_desc); |
473 | if (ACPI_FAILURE(status)) { | |
474 | return_ACPI_STATUS(status); | |
1da177e4 LT |
475 | } |
476 | ||
477 | /* | |
478 | * Create a resource linked list from the byte stream buffer that comes | |
479 | * back from the _CRS method execution. | |
480 | */ | |
4be44fcd | 481 | status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer); |
1da177e4 LT |
482 | |
483 | /* On exit, we must delete the object returned by evaluate_object */ | |
484 | ||
4be44fcd LB |
485 | acpi_ut_remove_reference(obj_desc); |
486 | return_ACPI_STATUS(status); | |
1da177e4 LT |
487 | } |
488 | ||
1da177e4 LT |
489 | /******************************************************************************* |
490 | * | |
491 | * FUNCTION: acpi_rs_get_crs_method_data | |
492 | * | |
4119532c | 493 | * PARAMETERS: Node - Device node |
52fc0b02 BM |
494 | * ret_buffer - Pointer to a buffer structure for the |
495 | * results | |
1da177e4 LT |
496 | * |
497 | * RETURN: Status | |
498 | * | |
499 | * DESCRIPTION: This function is called to get the _CRS value of an object | |
500 | * contained in an object specified by the handle passed in | |
501 | * | |
502 | * If the function fails an appropriate status will be returned | |
503 | * and the contents of the callers buffer is undefined. | |
504 | * | |
505 | ******************************************************************************/ | |
506 | ||
507 | acpi_status | |
4119532c BM |
508 | acpi_rs_get_crs_method_data(struct acpi_namespace_node *node, |
509 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 510 | { |
4be44fcd LB |
511 | union acpi_operand_object *obj_desc; |
512 | acpi_status status; | |
1da177e4 | 513 | |
b229cf92 | 514 | ACPI_FUNCTION_TRACE(rs_get_crs_method_data); |
1da177e4 LT |
515 | |
516 | /* Parameters guaranteed valid by caller */ | |
517 | ||
44f6c012 RM |
518 | /* Execute the method, no parameters */ |
519 | ||
4119532c | 520 | status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS, |
4be44fcd LB |
521 | ACPI_BTYPE_BUFFER, &obj_desc); |
522 | if (ACPI_FAILURE(status)) { | |
523 | return_ACPI_STATUS(status); | |
1da177e4 LT |
524 | } |
525 | ||
526 | /* | |
527 | * Make the call to create a resource linked list from the | |
528 | * byte stream buffer that comes back from the _CRS method | |
529 | * execution. | |
530 | */ | |
4be44fcd | 531 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 | 532 | |
958dd242 | 533 | /* On exit, we must delete the object returned by evaluate_object */ |
1da177e4 | 534 | |
4be44fcd LB |
535 | acpi_ut_remove_reference(obj_desc); |
536 | return_ACPI_STATUS(status); | |
1da177e4 LT |
537 | } |
538 | ||
1da177e4 LT |
539 | /******************************************************************************* |
540 | * | |
541 | * FUNCTION: acpi_rs_get_prs_method_data | |
542 | * | |
4119532c | 543 | * PARAMETERS: Node - Device node |
52fc0b02 BM |
544 | * ret_buffer - Pointer to a buffer structure for the |
545 | * results | |
1da177e4 LT |
546 | * |
547 | * RETURN: Status | |
548 | * | |
549 | * DESCRIPTION: This function is called to get the _PRS value of an object | |
550 | * contained in an object specified by the handle passed in | |
551 | * | |
552 | * If the function fails an appropriate status will be returned | |
553 | * and the contents of the callers buffer is undefined. | |
554 | * | |
555 | ******************************************************************************/ | |
44f6c012 | 556 | |
1da177e4 LT |
557 | #ifdef ACPI_FUTURE_USAGE |
558 | acpi_status | |
4119532c BM |
559 | acpi_rs_get_prs_method_data(struct acpi_namespace_node *node, |
560 | struct acpi_buffer *ret_buffer) | |
1da177e4 | 561 | { |
4be44fcd LB |
562 | union acpi_operand_object *obj_desc; |
563 | acpi_status status; | |
1da177e4 | 564 | |
b229cf92 | 565 | ACPI_FUNCTION_TRACE(rs_get_prs_method_data); |
1da177e4 LT |
566 | |
567 | /* Parameters guaranteed valid by caller */ | |
568 | ||
44f6c012 RM |
569 | /* Execute the method, no parameters */ |
570 | ||
4119532c | 571 | status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS, |
4be44fcd LB |
572 | ACPI_BTYPE_BUFFER, &obj_desc); |
573 | if (ACPI_FAILURE(status)) { | |
574 | return_ACPI_STATUS(status); | |
1da177e4 LT |
575 | } |
576 | ||
577 | /* | |
578 | * Make the call to create a resource linked list from the | |
579 | * byte stream buffer that comes back from the _CRS method | |
580 | * execution. | |
581 | */ | |
4be44fcd | 582 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 | 583 | |
958dd242 | 584 | /* On exit, we must delete the object returned by evaluate_object */ |
1da177e4 | 585 | |
4be44fcd LB |
586 | acpi_ut_remove_reference(obj_desc); |
587 | return_ACPI_STATUS(status); | |
1da177e4 | 588 | } |
4be44fcd | 589 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
590 | |
591 | /******************************************************************************* | |
592 | * | |
593 | * FUNCTION: acpi_rs_get_method_data | |
594 | * | |
52fc0b02 | 595 | * PARAMETERS: Handle - Handle to the containing object |
44f6c012 | 596 | * Path - Path to method, relative to Handle |
52fc0b02 BM |
597 | * ret_buffer - Pointer to a buffer structure for the |
598 | * results | |
1da177e4 LT |
599 | * |
600 | * RETURN: Status | |
601 | * | |
602 | * DESCRIPTION: This function is called to get the _CRS or _PRS value of an | |
603 | * object contained in an object specified by the handle passed in | |
604 | * | |
605 | * If the function fails an appropriate status will be returned | |
606 | * and the contents of the callers buffer is undefined. | |
607 | * | |
608 | ******************************************************************************/ | |
609 | ||
610 | acpi_status | |
4be44fcd LB |
611 | acpi_rs_get_method_data(acpi_handle handle, |
612 | char *path, struct acpi_buffer *ret_buffer) | |
1da177e4 | 613 | { |
4be44fcd LB |
614 | union acpi_operand_object *obj_desc; |
615 | acpi_status status; | |
1da177e4 | 616 | |
b229cf92 | 617 | ACPI_FUNCTION_TRACE(rs_get_method_data); |
1da177e4 LT |
618 | |
619 | /* Parameters guaranteed valid by caller */ | |
620 | ||
44f6c012 RM |
621 | /* Execute the method, no parameters */ |
622 | ||
4be44fcd LB |
623 | status = |
624 | acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc); | |
625 | if (ACPI_FAILURE(status)) { | |
626 | return_ACPI_STATUS(status); | |
1da177e4 LT |
627 | } |
628 | ||
629 | /* | |
630 | * Make the call to create a resource linked list from the | |
631 | * byte stream buffer that comes back from the method | |
632 | * execution. | |
633 | */ | |
4be44fcd | 634 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 LT |
635 | |
636 | /* On exit, we must delete the object returned by evaluate_object */ | |
637 | ||
4be44fcd LB |
638 | acpi_ut_remove_reference(obj_desc); |
639 | return_ACPI_STATUS(status); | |
1da177e4 LT |
640 | } |
641 | ||
642 | /******************************************************************************* | |
643 | * | |
644 | * FUNCTION: acpi_rs_set_srs_method_data | |
645 | * | |
4119532c | 646 | * PARAMETERS: Node - Device node |
52fc0b02 BM |
647 | * in_buffer - Pointer to a buffer structure of the |
648 | * parameter | |
1da177e4 LT |
649 | * |
650 | * RETURN: Status | |
651 | * | |
652 | * DESCRIPTION: This function is called to set the _SRS of an object contained | |
653 | * in an object specified by the handle passed in | |
654 | * | |
655 | * If the function fails an appropriate status will be returned | |
656 | * and the contents of the callers buffer is undefined. | |
657 | * | |
4119532c BM |
658 | * Note: Parameters guaranteed valid by caller |
659 | * | |
1da177e4 LT |
660 | ******************************************************************************/ |
661 | ||
662 | acpi_status | |
4119532c BM |
663 | acpi_rs_set_srs_method_data(struct acpi_namespace_node *node, |
664 | struct acpi_buffer *in_buffer) | |
1da177e4 | 665 | { |
4119532c BM |
666 | struct acpi_evaluate_info *info; |
667 | union acpi_operand_object *args[2]; | |
4be44fcd LB |
668 | acpi_status status; |
669 | struct acpi_buffer buffer; | |
1da177e4 | 670 | |
b229cf92 | 671 | ACPI_FUNCTION_TRACE(rs_set_srs_method_data); |
1da177e4 | 672 | |
4119532c BM |
673 | /* Allocate and initialize the evaluation information block */ |
674 | ||
675 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
676 | if (!info) { | |
677 | return_ACPI_STATUS(AE_NO_MEMORY); | |
678 | } | |
679 | ||
680 | info->prefix_node = node; | |
681 | info->pathname = METHOD_NAME__SRS; | |
682 | info->parameters = args; | |
4119532c | 683 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
1da177e4 LT |
684 | |
685 | /* | |
686 | * The in_buffer parameter will point to a linked list of | |
4119532c | 687 | * resource parameters. It needs to be formatted into a |
1da177e4 LT |
688 | * byte stream to be sent in as an input parameter to _SRS |
689 | * | |
690 | * Convert the linked list into a byte stream | |
691 | */ | |
692 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
50eca3eb | 693 | status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer); |
4be44fcd | 694 | if (ACPI_FAILURE(status)) { |
4119532c | 695 | goto cleanup; |
1da177e4 LT |
696 | } |
697 | ||
4119532c | 698 | /* Create and initialize the method parameter object */ |
44f6c012 | 699 | |
4119532c BM |
700 | args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
701 | if (!args[0]) { | |
702 | /* | |
703 | * Must free the buffer allocated above (otherwise it is freed | |
704 | * later) | |
705 | */ | |
706 | ACPI_FREE(buffer.pointer); | |
707 | status = AE_NO_MEMORY; | |
708 | goto cleanup; | |
1da177e4 LT |
709 | } |
710 | ||
4119532c BM |
711 | args[0]->buffer.length = (u32) buffer.length; |
712 | args[0]->buffer.pointer = buffer.pointer; | |
713 | args[0]->common.flags = AOPOBJ_DATA_VALID; | |
714 | args[1] = NULL; | |
1da177e4 | 715 | |
4119532c | 716 | /* Execute the method, no return value is expected */ |
1da177e4 | 717 | |
4119532c | 718 | status = acpi_ns_evaluate(info); |
44f6c012 | 719 | |
4119532c | 720 | /* Clean up and return the status from acpi_ns_evaluate */ |
1da177e4 | 721 | |
4119532c | 722 | acpi_ut_remove_reference(args[0]); |
44f6c012 | 723 | |
4119532c BM |
724 | cleanup: |
725 | ACPI_FREE(info); | |
4be44fcd | 726 | return_ACPI_STATUS(status); |
1da177e4 | 727 | } |