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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rsutils - Utilities for the resource manager | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acnamesp.h> | |
46 | #include <acpi/acresrc.h> | |
47 | ||
1da177e4 | 48 | #define _COMPONENT ACPI_RESOURCES |
4be44fcd | 49 | ACPI_MODULE_NAME("rsutils") |
1da177e4 | 50 | |
0897831b BM |
51 | /******************************************************************************* |
52 | * | |
53 | * FUNCTION: acpi_rs_decode_bitmask | |
54 | * | |
55 | * PARAMETERS: Mask - Bitmask to decode | |
56 | * List - Where the converted list is returned | |
57 | * | |
58 | * RETURN: Count of bits set (length of list) | |
59 | * | |
60 | * DESCRIPTION: Convert a bit mask into a list of values | |
61 | * | |
62 | ******************************************************************************/ | |
63 | u8 acpi_rs_decode_bitmask(u16 mask, u8 * list) | |
64 | { | |
65 | acpi_native_uint i; | |
66 | u8 bit_count; | |
67 | ||
96db255c BM |
68 | ACPI_FUNCTION_ENTRY(); |
69 | ||
0897831b BM |
70 | /* Decode the mask bits */ |
71 | ||
72 | for (i = 0, bit_count = 0; mask; i++) { | |
73 | if (mask & 0x0001) { | |
74 | list[bit_count] = (u8) i; | |
75 | bit_count++; | |
76 | } | |
77 | ||
78 | mask >>= 1; | |
79 | } | |
80 | ||
81 | return (bit_count); | |
82 | } | |
83 | ||
84 | /******************************************************************************* | |
85 | * | |
86 | * FUNCTION: acpi_rs_encode_bitmask | |
87 | * | |
88 | * PARAMETERS: List - List of values to encode | |
89 | * Count - Length of list | |
90 | * | |
91 | * RETURN: Encoded bitmask | |
92 | * | |
93 | * DESCRIPTION: Convert a list of values to an encoded bitmask | |
94 | * | |
95 | ******************************************************************************/ | |
96 | ||
97 | u16 acpi_rs_encode_bitmask(u8 * list, u8 count) | |
98 | { | |
99 | acpi_native_uint i; | |
100 | u16 mask; | |
101 | ||
96db255c BM |
102 | ACPI_FUNCTION_ENTRY(); |
103 | ||
0897831b BM |
104 | /* Encode the list into a single bitmask */ |
105 | ||
106 | for (i = 0, mask = 0; i < count; i++) { | |
107 | mask |= (0x0001 << list[i]); | |
108 | } | |
109 | ||
110 | return (mask); | |
111 | } | |
112 | ||
50eca3eb BM |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_rs_move_data | |
116 | * | |
117 | * PARAMETERS: Destination - Pointer to the destination descriptor | |
118 | * Source - Pointer to the source descriptor | |
119 | * item_count - How many items to move | |
120 | * move_type - Byte width | |
121 | * | |
122 | * RETURN: None | |
123 | * | |
124 | * DESCRIPTION: Move multiple data items from one descriptor to another. Handles | |
125 | * alignment issues and endian issues if necessary, as configured | |
126 | * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) | |
127 | * | |
128 | ******************************************************************************/ | |
0897831b | 129 | |
50eca3eb BM |
130 | void |
131 | acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type) | |
132 | { | |
133 | acpi_native_uint i; | |
134 | ||
96db255c BM |
135 | ACPI_FUNCTION_ENTRY(); |
136 | ||
50eca3eb BM |
137 | /* One move per item */ |
138 | ||
139 | for (i = 0; i < item_count; i++) { | |
140 | switch (move_type) { | |
0897831b BM |
141 | /* |
142 | * For the 8-bit case, we can perform the move all at once | |
143 | * since there are no alignment or endian issues | |
144 | */ | |
145 | case ACPI_RSC_MOVE8: | |
146 | ACPI_MEMCPY(destination, source, item_count); | |
147 | return; | |
50eca3eb | 148 | |
0897831b BM |
149 | /* |
150 | * 16-, 32-, and 64-bit cases must use the move macros that perform | |
151 | * endian conversion and/or accomodate hardware that cannot perform | |
152 | * misaligned memory transfers | |
153 | */ | |
154 | case ACPI_RSC_MOVE16: | |
c51a4de8 BM |
155 | ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i], |
156 | &ACPI_CAST_PTR(u16, source)[i]); | |
50eca3eb BM |
157 | break; |
158 | ||
0897831b | 159 | case ACPI_RSC_MOVE32: |
c51a4de8 BM |
160 | ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i], |
161 | &ACPI_CAST_PTR(u32, source)[i]); | |
50eca3eb BM |
162 | break; |
163 | ||
0897831b | 164 | case ACPI_RSC_MOVE64: |
c51a4de8 BM |
165 | ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i], |
166 | &ACPI_CAST_PTR(u64, source)[i]); | |
50eca3eb BM |
167 | break; |
168 | ||
169 | default: | |
170 | return; | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
50eca3eb BM |
175 | /******************************************************************************* |
176 | * | |
0897831b | 177 | * FUNCTION: acpi_rs_set_resource_length |
50eca3eb | 178 | * |
0897831b BM |
179 | * PARAMETERS: total_length - Length of the AML descriptor, including |
180 | * the header and length fields. | |
181 | * Aml - Pointer to the raw AML descriptor | |
50eca3eb | 182 | * |
0897831b | 183 | * RETURN: None |
50eca3eb | 184 | * |
0897831b BM |
185 | * DESCRIPTION: Set the resource_length field of an AML |
186 | * resource descriptor, both Large and Small descriptors are | |
187 | * supported automatically. Note: Descriptor Type field must | |
188 | * be valid. | |
50eca3eb BM |
189 | * |
190 | ******************************************************************************/ | |
191 | ||
0897831b BM |
192 | void |
193 | acpi_rs_set_resource_length(acpi_rsdesc_size total_length, | |
194 | union aml_resource *aml) | |
50eca3eb | 195 | { |
0897831b | 196 | acpi_rs_length resource_length; |
50eca3eb BM |
197 | |
198 | ACPI_FUNCTION_ENTRY(); | |
199 | ||
96db255c | 200 | /* Length is the total descriptor length minus the header length */ |
50eca3eb | 201 | |
96db255c BM |
202 | resource_length = (acpi_rs_length) |
203 | (total_length - acpi_ut_get_resource_header_length(aml)); | |
50eca3eb | 204 | |
96db255c | 205 | /* Length is stored differently for large and small descriptors */ |
0897831b | 206 | |
96db255c | 207 | if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) { |
52fc0b02 | 208 | |
96db255c | 209 | /* Large descriptor -- bytes 1-2 contain the 16-bit length */ |
50eca3eb | 210 | |
0897831b BM |
211 | ACPI_MOVE_16_TO_16(&aml->large_header.resource_length, |
212 | &resource_length); | |
50eca3eb | 213 | } else { |
96db255c | 214 | /* Small descriptor -- bits 2:0 of byte 0 contain the length */ |
50eca3eb | 215 | |
0897831b | 216 | aml->small_header.descriptor_type = (u8) |
50eca3eb | 217 | |
0897831b BM |
218 | /* Clear any existing length, preserving descriptor type bits */ |
219 | ((aml->small_header. | |
220 | descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) | |
50eca3eb | 221 | |
0897831b | 222 | | resource_length); |
50eca3eb | 223 | } |
50eca3eb BM |
224 | } |
225 | ||
226 | /******************************************************************************* | |
227 | * | |
228 | * FUNCTION: acpi_rs_set_resource_header | |
229 | * | |
230 | * PARAMETERS: descriptor_type - Byte to be inserted as the type | |
231 | * total_length - Length of the AML descriptor, including | |
232 | * the header and length fields. | |
233 | * Aml - Pointer to the raw AML descriptor | |
234 | * | |
235 | * RETURN: None | |
236 | * | |
237 | * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML | |
238 | * resource descriptor, both Large and Small descriptors are | |
239 | * supported automatically | |
240 | * | |
241 | ******************************************************************************/ | |
242 | ||
243 | void | |
244 | acpi_rs_set_resource_header(u8 descriptor_type, | |
0897831b BM |
245 | acpi_rsdesc_size total_length, |
246 | union aml_resource *aml) | |
50eca3eb | 247 | { |
50eca3eb BM |
248 | ACPI_FUNCTION_ENTRY(); |
249 | ||
96db255c | 250 | /* Set the Resource Type */ |
50eca3eb BM |
251 | |
252 | aml->small_header.descriptor_type = descriptor_type; | |
253 | ||
0897831b | 254 | /* Set the Resource Length */ |
50eca3eb | 255 | |
0897831b | 256 | acpi_rs_set_resource_length(total_length, aml); |
50eca3eb BM |
257 | } |
258 | ||
259 | /******************************************************************************* | |
260 | * | |
261 | * FUNCTION: acpi_rs_strcpy | |
262 | * | |
263 | * PARAMETERS: Destination - Pointer to the destination string | |
264 | * Source - Pointer to the source string | |
265 | * | |
266 | * RETURN: String length, including NULL terminator | |
267 | * | |
268 | * DESCRIPTION: Local string copy that returns the string length, saving a | |
269 | * strcpy followed by a strlen. | |
270 | * | |
271 | ******************************************************************************/ | |
272 | ||
273 | static u16 acpi_rs_strcpy(char *destination, char *source) | |
274 | { | |
275 | u16 i; | |
276 | ||
277 | ACPI_FUNCTION_ENTRY(); | |
278 | ||
279 | for (i = 0; source[i]; i++) { | |
280 | destination[i] = source[i]; | |
281 | } | |
282 | ||
283 | destination[i] = 0; | |
284 | ||
285 | /* Return string length including the NULL terminator */ | |
286 | ||
287 | return ((u16) (i + 1)); | |
288 | } | |
289 | ||
290 | /******************************************************************************* | |
291 | * | |
292 | * FUNCTION: acpi_rs_get_resource_source | |
293 | * | |
294 | * PARAMETERS: resource_length - Length field of the descriptor | |
295 | * minimum_length - Minimum length of the descriptor (minus | |
296 | * any optional fields) | |
297 | * resource_source - Where the resource_source is returned | |
298 | * Aml - Pointer to the raw AML descriptor | |
299 | * string_ptr - (optional) where to store the actual | |
300 | * resource_source string | |
301 | * | |
ea936b78 BM |
302 | * RETURN: Length of the string plus NULL terminator, rounded up to native |
303 | * word boundary | |
50eca3eb BM |
304 | * |
305 | * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor | |
306 | * to an internal resource descriptor | |
307 | * | |
308 | ******************************************************************************/ | |
309 | ||
0897831b BM |
310 | acpi_rs_length |
311 | acpi_rs_get_resource_source(acpi_rs_length resource_length, | |
312 | acpi_rs_length minimum_length, | |
50eca3eb BM |
313 | struct acpi_resource_source * resource_source, |
314 | union aml_resource * aml, char *string_ptr) | |
315 | { | |
0897831b | 316 | acpi_rsdesc_size total_length; |
50eca3eb BM |
317 | u8 *aml_resource_source; |
318 | ||
319 | ACPI_FUNCTION_ENTRY(); | |
320 | ||
321 | total_length = | |
322 | resource_length + sizeof(struct aml_resource_large_header); | |
c51a4de8 | 323 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
50eca3eb BM |
324 | |
325 | /* | |
326 | * resource_source is present if the length of the descriptor is longer than | |
327 | * the minimum length. | |
328 | * | |
329 | * Note: Some resource descriptors will have an additional null, so | |
330 | * we add 1 to the minimum length. | |
331 | */ | |
0897831b | 332 | if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) { |
52fc0b02 | 333 | |
50eca3eb BM |
334 | /* Get the resource_source_index */ |
335 | ||
336 | resource_source->index = aml_resource_source[0]; | |
337 | ||
338 | resource_source->string_ptr = string_ptr; | |
339 | if (!string_ptr) { | |
340 | /* | |
341 | * String destination pointer is not specified; Set the String | |
342 | * pointer to the end of the current resource_source structure. | |
343 | */ | |
c51a4de8 BM |
344 | resource_source->string_ptr = |
345 | ACPI_ADD_PTR(char, resource_source, | |
346 | sizeof(struct acpi_resource_source)); | |
50eca3eb BM |
347 | } |
348 | ||
0897831b | 349 | /* |
ea936b78 BM |
350 | * In order for the Resource length to be a multiple of the native |
351 | * word, calculate the length of the string (+1 for NULL terminator) | |
352 | * and expand to the next word multiple. | |
0897831b BM |
353 | * |
354 | * Zero the entire area of the buffer. | |
355 | */ | |
356 | total_length = | |
ea936b78 BM |
357 | ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + |
358 | 1; | |
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 | * | |
52fc0b02 BM |
444 | * PARAMETERS: Handle - Handle to the containing object |
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 |
50eca3eb | 459 | acpi_rs_get_prt_method_data(acpi_handle handle, struct acpi_buffer * ret_buffer) |
1da177e4 | 460 | { |
4be44fcd LB |
461 | union acpi_operand_object *obj_desc; |
462 | acpi_status status; | |
1da177e4 | 463 | |
b229cf92 | 464 | ACPI_FUNCTION_TRACE(rs_get_prt_method_data); |
1da177e4 LT |
465 | |
466 | /* Parameters guaranteed valid by caller */ | |
467 | ||
44f6c012 RM |
468 | /* Execute the method, no parameters */ |
469 | ||
4be44fcd LB |
470 | status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRT, |
471 | ACPI_BTYPE_PACKAGE, &obj_desc); | |
472 | if (ACPI_FAILURE(status)) { | |
473 | return_ACPI_STATUS(status); | |
1da177e4 LT |
474 | } |
475 | ||
476 | /* | |
477 | * Create a resource linked list from the byte stream buffer that comes | |
478 | * back from the _CRS method execution. | |
479 | */ | |
4be44fcd | 480 | status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer); |
1da177e4 LT |
481 | |
482 | /* On exit, we must delete the object returned by evaluate_object */ | |
483 | ||
4be44fcd LB |
484 | acpi_ut_remove_reference(obj_desc); |
485 | return_ACPI_STATUS(status); | |
1da177e4 LT |
486 | } |
487 | ||
1da177e4 LT |
488 | /******************************************************************************* |
489 | * | |
490 | * FUNCTION: acpi_rs_get_crs_method_data | |
491 | * | |
52fc0b02 BM |
492 | * PARAMETERS: Handle - Handle to the containing object |
493 | * ret_buffer - Pointer to a buffer structure for the | |
494 | * results | |
1da177e4 LT |
495 | * |
496 | * RETURN: Status | |
497 | * | |
498 | * DESCRIPTION: This function is called to get the _CRS value of an object | |
499 | * contained in an object specified by the handle passed in | |
500 | * | |
501 | * If the function fails an appropriate status will be returned | |
502 | * and the contents of the callers buffer is undefined. | |
503 | * | |
504 | ******************************************************************************/ | |
505 | ||
506 | acpi_status | |
4be44fcd | 507 | acpi_rs_get_crs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) |
1da177e4 | 508 | { |
4be44fcd LB |
509 | union acpi_operand_object *obj_desc; |
510 | acpi_status status; | |
1da177e4 | 511 | |
b229cf92 | 512 | ACPI_FUNCTION_TRACE(rs_get_crs_method_data); |
1da177e4 LT |
513 | |
514 | /* Parameters guaranteed valid by caller */ | |
515 | ||
44f6c012 RM |
516 | /* Execute the method, no parameters */ |
517 | ||
4be44fcd LB |
518 | status = acpi_ut_evaluate_object(handle, METHOD_NAME__CRS, |
519 | ACPI_BTYPE_BUFFER, &obj_desc); | |
520 | if (ACPI_FAILURE(status)) { | |
521 | return_ACPI_STATUS(status); | |
1da177e4 LT |
522 | } |
523 | ||
524 | /* | |
525 | * Make the call to create a resource linked list from the | |
526 | * byte stream buffer that comes back from the _CRS method | |
527 | * execution. | |
528 | */ | |
4be44fcd | 529 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 LT |
530 | |
531 | /* on exit, we must delete the object returned by evaluate_object */ | |
532 | ||
4be44fcd LB |
533 | acpi_ut_remove_reference(obj_desc); |
534 | return_ACPI_STATUS(status); | |
1da177e4 LT |
535 | } |
536 | ||
1da177e4 LT |
537 | /******************************************************************************* |
538 | * | |
539 | * FUNCTION: acpi_rs_get_prs_method_data | |
540 | * | |
52fc0b02 BM |
541 | * PARAMETERS: Handle - Handle to the containing object |
542 | * ret_buffer - Pointer to a buffer structure for the | |
543 | * results | |
1da177e4 LT |
544 | * |
545 | * RETURN: Status | |
546 | * | |
547 | * DESCRIPTION: This function is called to get the _PRS value of an object | |
548 | * contained in an object specified by the handle passed in | |
549 | * | |
550 | * If the function fails an appropriate status will be returned | |
551 | * and the contents of the callers buffer is undefined. | |
552 | * | |
553 | ******************************************************************************/ | |
44f6c012 | 554 | |
1da177e4 LT |
555 | #ifdef ACPI_FUTURE_USAGE |
556 | acpi_status | |
4be44fcd | 557 | acpi_rs_get_prs_method_data(acpi_handle handle, struct acpi_buffer *ret_buffer) |
1da177e4 | 558 | { |
4be44fcd LB |
559 | union acpi_operand_object *obj_desc; |
560 | acpi_status status; | |
1da177e4 | 561 | |
b229cf92 | 562 | ACPI_FUNCTION_TRACE(rs_get_prs_method_data); |
1da177e4 LT |
563 | |
564 | /* Parameters guaranteed valid by caller */ | |
565 | ||
44f6c012 RM |
566 | /* Execute the method, no parameters */ |
567 | ||
4be44fcd LB |
568 | status = acpi_ut_evaluate_object(handle, METHOD_NAME__PRS, |
569 | ACPI_BTYPE_BUFFER, &obj_desc); | |
570 | if (ACPI_FAILURE(status)) { | |
571 | return_ACPI_STATUS(status); | |
1da177e4 LT |
572 | } |
573 | ||
574 | /* | |
575 | * Make the call to create a resource linked list from the | |
576 | * byte stream buffer that comes back from the _CRS method | |
577 | * execution. | |
578 | */ | |
4be44fcd | 579 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 LT |
580 | |
581 | /* on exit, we must delete the object returned by evaluate_object */ | |
582 | ||
4be44fcd LB |
583 | acpi_ut_remove_reference(obj_desc); |
584 | return_ACPI_STATUS(status); | |
1da177e4 | 585 | } |
4be44fcd | 586 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
587 | |
588 | /******************************************************************************* | |
589 | * | |
590 | * FUNCTION: acpi_rs_get_method_data | |
591 | * | |
52fc0b02 | 592 | * PARAMETERS: Handle - Handle to the containing object |
44f6c012 | 593 | * Path - Path to method, relative to Handle |
52fc0b02 BM |
594 | * ret_buffer - Pointer to a buffer structure for the |
595 | * results | |
1da177e4 LT |
596 | * |
597 | * RETURN: Status | |
598 | * | |
599 | * DESCRIPTION: This function is called to get the _CRS or _PRS value of an | |
600 | * object contained in an object specified by the handle passed in | |
601 | * | |
602 | * If the function fails an appropriate status will be returned | |
603 | * and the contents of the callers buffer is undefined. | |
604 | * | |
605 | ******************************************************************************/ | |
606 | ||
607 | acpi_status | |
4be44fcd LB |
608 | acpi_rs_get_method_data(acpi_handle handle, |
609 | char *path, struct acpi_buffer *ret_buffer) | |
1da177e4 | 610 | { |
4be44fcd LB |
611 | union acpi_operand_object *obj_desc; |
612 | acpi_status status; | |
1da177e4 | 613 | |
b229cf92 | 614 | ACPI_FUNCTION_TRACE(rs_get_method_data); |
1da177e4 LT |
615 | |
616 | /* Parameters guaranteed valid by caller */ | |
617 | ||
44f6c012 RM |
618 | /* Execute the method, no parameters */ |
619 | ||
4be44fcd LB |
620 | status = |
621 | acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc); | |
622 | if (ACPI_FAILURE(status)) { | |
623 | return_ACPI_STATUS(status); | |
1da177e4 LT |
624 | } |
625 | ||
626 | /* | |
627 | * Make the call to create a resource linked list from the | |
628 | * byte stream buffer that comes back from the method | |
629 | * execution. | |
630 | */ | |
4be44fcd | 631 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
1da177e4 LT |
632 | |
633 | /* On exit, we must delete the object returned by evaluate_object */ | |
634 | ||
4be44fcd LB |
635 | acpi_ut_remove_reference(obj_desc); |
636 | return_ACPI_STATUS(status); | |
1da177e4 LT |
637 | } |
638 | ||
639 | /******************************************************************************* | |
640 | * | |
641 | * FUNCTION: acpi_rs_set_srs_method_data | |
642 | * | |
52fc0b02 BM |
643 | * PARAMETERS: Handle - Handle to the containing object |
644 | * in_buffer - Pointer to a buffer structure of the | |
645 | * parameter | |
1da177e4 LT |
646 | * |
647 | * RETURN: Status | |
648 | * | |
649 | * DESCRIPTION: This function is called to set the _SRS of an object contained | |
650 | * in an object specified by the handle passed in | |
651 | * | |
652 | * If the function fails an appropriate status will be returned | |
653 | * and the contents of the callers buffer is undefined. | |
654 | * | |
655 | ******************************************************************************/ | |
656 | ||
657 | acpi_status | |
4be44fcd | 658 | acpi_rs_set_srs_method_data(acpi_handle handle, struct acpi_buffer *in_buffer) |
1da177e4 | 659 | { |
4be44fcd LB |
660 | struct acpi_parameter_info info; |
661 | union acpi_operand_object *params[2]; | |
662 | acpi_status status; | |
663 | struct acpi_buffer buffer; | |
1da177e4 | 664 | |
b229cf92 | 665 | ACPI_FUNCTION_TRACE(rs_set_srs_method_data); |
1da177e4 LT |
666 | |
667 | /* Parameters guaranteed valid by caller */ | |
668 | ||
669 | /* | |
670 | * The in_buffer parameter will point to a linked list of | |
671 | * resource parameters. It needs to be formatted into a | |
672 | * byte stream to be sent in as an input parameter to _SRS | |
673 | * | |
674 | * Convert the linked list into a byte stream | |
675 | */ | |
676 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; | |
50eca3eb | 677 | status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer); |
4be44fcd LB |
678 | if (ACPI_FAILURE(status)) { |
679 | return_ACPI_STATUS(status); | |
1da177e4 LT |
680 | } |
681 | ||
44f6c012 RM |
682 | /* Init the param object */ |
683 | ||
4be44fcd | 684 | params[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
1da177e4 | 685 | if (!params[0]) { |
4be44fcd LB |
686 | acpi_os_free(buffer.pointer); |
687 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
688 | } |
689 | ||
44f6c012 RM |
690 | /* Set up the parameter object */ |
691 | ||
4be44fcd | 692 | params[0]->buffer.length = (u32) buffer.length; |
1da177e4 | 693 | params[0]->buffer.pointer = buffer.pointer; |
4be44fcd | 694 | params[0]->common.flags = AOPOBJ_DATA_VALID; |
1da177e4 LT |
695 | params[1] = NULL; |
696 | ||
697 | info.node = handle; | |
698 | info.parameters = params; | |
699 | info.parameter_type = ACPI_PARAM_ARGS; | |
700 | ||
44f6c012 RM |
701 | /* Execute the method, no return value */ |
702 | ||
4be44fcd LB |
703 | status = acpi_ns_evaluate_relative(METHOD_NAME__SRS, &info); |
704 | if (ACPI_SUCCESS(status)) { | |
52fc0b02 | 705 | |
1da177e4 LT |
706 | /* Delete any return object (especially if implicit_return is enabled) */ |
707 | ||
708 | if (info.return_object) { | |
4be44fcd | 709 | acpi_ut_remove_reference(info.return_object); |
1da177e4 LT |
710 | } |
711 | } | |
712 | ||
44f6c012 RM |
713 | /* Clean up and return the status from acpi_ns_evaluate_relative */ |
714 | ||
4be44fcd LB |
715 | acpi_ut_remove_reference(params[0]); |
716 | return_ACPI_STATUS(status); | |
1da177e4 | 717 | } |