Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsxfname - Public interfaces to the ACPI subsystem | |
4 | * ACPI Namespace oriented interfaces | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
c8100dc4 | 9 | * Copyright (C) 2000 - 2016, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
839e928f LZ |
45 | #define EXPORT_ACPI_INTERFACES |
46 | ||
1da177e4 | 47 | #include <acpi/acpi.h> |
e2f7a777 LB |
48 | #include "accommon.h" |
49 | #include "acnamesp.h" | |
b2f7ddcf LM |
50 | #include "acparser.h" |
51 | #include "amlcode.h" | |
1da177e4 | 52 | |
1da177e4 | 53 | #define _COMPONENT ACPI_NAMESPACE |
4be44fcd | 54 | ACPI_MODULE_NAME("nsxfname") |
1da177e4 | 55 | |
15b8dd53 | 56 | /* Local prototypes */ |
78e25fef LZ |
57 | static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest, |
58 | struct acpi_pnp_device_id *source, | |
15b8dd53 BM |
59 | char *string_area); |
60 | ||
1da177e4 LT |
61 | /****************************************************************************** |
62 | * | |
63 | * FUNCTION: acpi_get_handle | |
64 | * | |
ba494bee BM |
65 | * PARAMETERS: parent - Object to search under (search scope). |
66 | * pathname - Pointer to an asciiz string containing the | |
44f6c012 RM |
67 | * name |
68 | * ret_handle - Where the return handle is returned | |
1da177e4 LT |
69 | * |
70 | * RETURN: Status | |
71 | * | |
72 | * DESCRIPTION: This routine will search for a caller specified name in the | |
73a3090a BM |
73 | * name space. The caller can restrict the search region by |
74 | * specifying a non NULL parent. The parent value is itself a | |
1da177e4 LT |
75 | * namespace handle. |
76 | * | |
77 | ******************************************************************************/ | |
15b8dd53 | 78 | |
1da177e4 | 79 | acpi_status |
4be44fcd | 80 | acpi_get_handle(acpi_handle parent, |
f5c1e1c5 | 81 | acpi_string pathname, acpi_handle *ret_handle) |
1da177e4 | 82 | { |
4be44fcd LB |
83 | acpi_status status; |
84 | struct acpi_namespace_node *node = NULL; | |
85 | struct acpi_namespace_node *prefix_node = NULL; | |
1da177e4 | 86 | |
4be44fcd | 87 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
88 | |
89 | /* Parameter Validation */ | |
90 | ||
91 | if (!ret_handle || !pathname) { | |
92 | return (AE_BAD_PARAMETER); | |
93 | } | |
94 | ||
95 | /* Convert a parent handle to a prefix node */ | |
96 | ||
97 | if (parent) { | |
f24b664d | 98 | prefix_node = acpi_ns_validate_handle(parent); |
1da177e4 | 99 | if (!prefix_node) { |
1da177e4 LT |
100 | return (AE_BAD_PARAMETER); |
101 | } | |
f1c2b1da BM |
102 | } |
103 | ||
104 | /* | |
105 | * Valid cases are: | |
106 | * 1) Fully qualified pathname | |
107 | * 2) Parent + Relative pathname | |
108 | * | |
109 | * Error for <null Parent + relative path> | |
110 | */ | |
04a81dce | 111 | if (ACPI_IS_ROOT_PREFIX(pathname[0])) { |
1da177e4 | 112 | |
f1c2b1da BM |
113 | /* Pathname is fully qualified (starts with '\') */ |
114 | ||
115 | /* Special case for root-only, since we can't search for it */ | |
116 | ||
4fa4616e | 117 | if (!strcmp(pathname, ACPI_NS_ROOT_PATH)) { |
f1c2b1da | 118 | *ret_handle = |
f24b664d | 119 | ACPI_CAST_PTR(acpi_handle, acpi_gbl_root_node); |
f1c2b1da | 120 | return (AE_OK); |
1da177e4 | 121 | } |
f1c2b1da | 122 | } else if (!prefix_node) { |
1da177e4 | 123 | |
f1c2b1da | 124 | /* Relative path with null prefix is disallowed */ |
1da177e4 | 125 | |
f1c2b1da | 126 | return (AE_BAD_PARAMETER); |
1da177e4 LT |
127 | } |
128 | ||
f1c2b1da | 129 | /* Find the Node and convert to a handle */ |
1da177e4 | 130 | |
f1c2b1da BM |
131 | status = |
132 | acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, &node); | |
4be44fcd | 133 | if (ACPI_SUCCESS(status)) { |
f24b664d | 134 | *ret_handle = ACPI_CAST_PTR(acpi_handle, node); |
1da177e4 LT |
135 | } |
136 | ||
137 | return (status); | |
138 | } | |
1da177e4 | 139 | |
8313524a | 140 | ACPI_EXPORT_SYMBOL(acpi_get_handle) |
1da177e4 LT |
141 | |
142 | /****************************************************************************** | |
143 | * | |
144 | * FUNCTION: acpi_get_name | |
145 | * | |
ba494bee | 146 | * PARAMETERS: handle - Handle to be converted to a pathname |
1da177e4 | 147 | * name_type - Full pathname or single segment |
ba494bee | 148 | * buffer - Buffer for returned path |
1da177e4 LT |
149 | * |
150 | * RETURN: Pointer to a string containing the fully qualified Name. | |
151 | * | |
152 | * DESCRIPTION: This routine returns the fully qualified name associated with | |
73a3090a | 153 | * the Handle parameter. This and the acpi_pathname_to_handle are |
1da177e4 LT |
154 | * complementary functions. |
155 | * | |
156 | ******************************************************************************/ | |
1da177e4 | 157 | acpi_status |
f5c1e1c5 | 158 | acpi_get_name(acpi_handle handle, u32 name_type, struct acpi_buffer *buffer) |
1da177e4 | 159 | { |
4be44fcd LB |
160 | acpi_status status; |
161 | struct acpi_namespace_node *node; | |
c118abc5 | 162 | const char *node_name; |
1da177e4 LT |
163 | |
164 | /* Parameter validation */ | |
165 | ||
166 | if (name_type > ACPI_NAME_TYPE_MAX) { | |
167 | return (AE_BAD_PARAMETER); | |
168 | } | |
169 | ||
4be44fcd LB |
170 | status = acpi_ut_validate_buffer(buffer); |
171 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
172 | return (status); |
173 | } | |
174 | ||
d1e7ffe5 LZ |
175 | if (name_type == ACPI_FULL_PATHNAME || |
176 | name_type == ACPI_FULL_PATHNAME_NO_TRAILING) { | |
52fc0b02 | 177 | |
1da177e4 LT |
178 | /* Get the full pathname (From the namespace root) */ |
179 | ||
d1e7ffe5 LZ |
180 | status = acpi_ns_handle_to_pathname(handle, buffer, |
181 | name_type == | |
182 | ACPI_FULL_PATHNAME ? FALSE : | |
183 | TRUE); | |
1da177e4 LT |
184 | return (status); |
185 | } | |
186 | ||
187 | /* | |
188 | * Wants the single segment ACPI name. | |
189 | * Validate handle and convert to a namespace Node | |
190 | */ | |
4be44fcd LB |
191 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
192 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
193 | return (status); |
194 | } | |
195 | ||
f24b664d | 196 | node = acpi_ns_validate_handle(handle); |
1da177e4 LT |
197 | if (!node) { |
198 | status = AE_BAD_PARAMETER; | |
199 | goto unlock_and_exit; | |
200 | } | |
201 | ||
202 | /* Validate/Allocate/Clear caller buffer */ | |
203 | ||
4be44fcd LB |
204 | status = acpi_ut_initialize_buffer(buffer, ACPI_PATH_SEGMENT_LENGTH); |
205 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
206 | goto unlock_and_exit; |
207 | } | |
208 | ||
209 | /* Just copy the ACPI name from the Node and zero terminate it */ | |
210 | ||
bbe707ed JK |
211 | node_name = acpi_ut_get_node_name(node); |
212 | ACPI_MOVE_NAME(buffer->pointer, node_name); | |
4be44fcd | 213 | ((char *)buffer->pointer)[ACPI_NAME_SIZE] = 0; |
1da177e4 LT |
214 | status = AE_OK; |
215 | ||
10622bf8 | 216 | unlock_and_exit: |
1da177e4 | 217 | |
4be44fcd | 218 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 LT |
219 | return (status); |
220 | } | |
1da177e4 | 221 | |
8313524a | 222 | ACPI_EXPORT_SYMBOL(acpi_get_name) |
1da177e4 | 223 | |
15b8dd53 BM |
224 | /****************************************************************************** |
225 | * | |
226 | * FUNCTION: acpi_ns_copy_device_id | |
227 | * | |
78e25fef LZ |
228 | * PARAMETERS: dest - Pointer to the destination PNP_DEVICE_ID |
229 | * source - Pointer to the source PNP_DEVICE_ID | |
15b8dd53 BM |
230 | * string_area - Pointer to where to copy the dest string |
231 | * | |
232 | * RETURN: Pointer to the next string area | |
233 | * | |
78e25fef | 234 | * DESCRIPTION: Copy a single PNP_DEVICE_ID, including the string data. |
15b8dd53 BM |
235 | * |
236 | ******************************************************************************/ | |
78e25fef LZ |
237 | static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest, |
238 | struct acpi_pnp_device_id *source, | |
15b8dd53 BM |
239 | char *string_area) |
240 | { | |
78e25fef | 241 | /* Create the destination PNP_DEVICE_ID */ |
15b8dd53 BM |
242 | |
243 | dest->string = string_area; | |
244 | dest->length = source->length; | |
245 | ||
246 | /* Copy actual string and return a pointer to the next string area */ | |
247 | ||
4fa4616e | 248 | memcpy(string_area, source->string, source->length); |
15b8dd53 BM |
249 | return (string_area + source->length); |
250 | } | |
251 | ||
1da177e4 LT |
252 | /****************************************************************************** |
253 | * | |
254 | * FUNCTION: acpi_get_object_info | |
255 | * | |
ba494bee | 256 | * PARAMETERS: handle - Object Handle |
15b8dd53 | 257 | * return_buffer - Where the info is returned |
1da177e4 LT |
258 | * |
259 | * RETURN: Status | |
260 | * | |
261 | * DESCRIPTION: Returns information about an object as gleaned from the | |
262 | * namespace node and possibly by running several standard | |
263 | * control methods (Such as in the case of a device.) | |
264 | * | |
07cb390f BM |
265 | * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA, |
266 | * _CLS, _ADR, _sx_w, and _sx_d methods. | |
15b8dd53 BM |
267 | * |
268 | * Note: Allocates the return buffer, must be freed by the caller. | |
269 | * | |
c6c6069c BM |
270 | * Note: This interface is intended to be used during the initial device |
271 | * discovery namespace traversal. Therefore, no complex methods can be | |
272 | * executed, especially those that access operation regions. Therefore, do | |
273 | * not add any additional methods that could cause problems in this area. | |
274 | * this was the fate of the _SUB method which was found to cause such | |
275 | * problems and was removed (11/2015). | |
276 | * | |
1da177e4 | 277 | ******************************************************************************/ |
15b8dd53 | 278 | |
1da177e4 | 279 | acpi_status |
15b8dd53 BM |
280 | acpi_get_object_info(acpi_handle handle, |
281 | struct acpi_device_info **return_buffer) | |
1da177e4 | 282 | { |
4be44fcd LB |
283 | struct acpi_namespace_node *node; |
284 | struct acpi_device_info *info; | |
78e25fef LZ |
285 | struct acpi_pnp_device_id_list *cid_list = NULL; |
286 | struct acpi_pnp_device_id *hid = NULL; | |
287 | struct acpi_pnp_device_id *uid = NULL; | |
f65358e5 | 288 | struct acpi_pnp_device_id *cls = NULL; |
15b8dd53 BM |
289 | char *next_id_string; |
290 | acpi_object_type type; | |
291 | acpi_name name; | |
292 | u8 param_count = 0; | |
f65358e5 | 293 | u16 valid = 0; |
15b8dd53 BM |
294 | u32 info_size; |
295 | u32 i; | |
296 | acpi_status status; | |
1da177e4 LT |
297 | |
298 | /* Parameter validation */ | |
299 | ||
15b8dd53 | 300 | if (!handle || !return_buffer) { |
1da177e4 LT |
301 | return (AE_BAD_PARAMETER); |
302 | } | |
303 | ||
4be44fcd LB |
304 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
305 | if (ACPI_FAILURE(status)) { | |
ef0b67fe | 306 | return (status); |
1da177e4 LT |
307 | } |
308 | ||
f24b664d | 309 | node = acpi_ns_validate_handle(handle); |
1da177e4 | 310 | if (!node) { |
4be44fcd | 311 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
15b8dd53 | 312 | return (AE_BAD_PARAMETER); |
1da177e4 LT |
313 | } |
314 | ||
15b8dd53 | 315 | /* Get the namespace node data while the namespace is locked */ |
1da177e4 | 316 | |
15b8dd53 BM |
317 | info_size = sizeof(struct acpi_device_info); |
318 | type = node->type; | |
319 | name = node->name.integer; | |
1da177e4 | 320 | |
0a1fbf2d | 321 | if (node->type == ACPI_TYPE_METHOD) { |
15b8dd53 | 322 | param_count = node->object->method.param_count; |
0a1fbf2d BM |
323 | } |
324 | ||
4be44fcd LB |
325 | status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
326 | if (ACPI_FAILURE(status)) { | |
15b8dd53 | 327 | return (status); |
1da177e4 LT |
328 | } |
329 | ||
15b8dd53 | 330 | if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) { |
1da177e4 | 331 | /* |
15b8dd53 | 332 | * Get extra info for ACPI Device/Processor objects only: |
07cb390f | 333 | * Run the Device _HID, _UID, _CLS, and _CID methods. |
1da177e4 LT |
334 | * |
335 | * Note: none of these methods are required, so they may or may | |
15b8dd53 BM |
336 | * not be present for this device. The Info->Valid bitfield is used |
337 | * to indicate which methods were found and run successfully. | |
1da177e4 LT |
338 | */ |
339 | ||
340 | /* Execute the Device._HID method */ | |
341 | ||
15b8dd53 | 342 | status = acpi_ut_execute_HID(node, &hid); |
4be44fcd | 343 | if (ACPI_SUCCESS(status)) { |
15b8dd53 BM |
344 | info_size += hid->length; |
345 | valid |= ACPI_VALID_HID; | |
1da177e4 LT |
346 | } |
347 | ||
348 | /* Execute the Device._UID method */ | |
349 | ||
15b8dd53 | 350 | status = acpi_ut_execute_UID(node, &uid); |
4be44fcd | 351 | if (ACPI_SUCCESS(status)) { |
15b8dd53 BM |
352 | info_size += uid->length; |
353 | valid |= ACPI_VALID_UID; | |
1da177e4 LT |
354 | } |
355 | ||
356 | /* Execute the Device._CID method */ | |
357 | ||
4be44fcd LB |
358 | status = acpi_ut_execute_CID(node, &cid_list); |
359 | if (ACPI_SUCCESS(status)) { | |
15b8dd53 BM |
360 | |
361 | /* Add size of CID strings and CID pointer array */ | |
362 | ||
363 | info_size += | |
364 | (cid_list->list_size - | |
78e25fef | 365 | sizeof(struct acpi_pnp_device_id_list)); |
15b8dd53 | 366 | valid |= ACPI_VALID_CID; |
1da177e4 | 367 | } |
f65358e5 SS |
368 | |
369 | /* Execute the Device._CLS method */ | |
370 | ||
371 | status = acpi_ut_execute_CLS(node, &cls); | |
372 | if (ACPI_SUCCESS(status)) { | |
373 | info_size += cls->length; | |
374 | valid |= ACPI_VALID_CLS; | |
375 | } | |
15b8dd53 BM |
376 | } |
377 | ||
378 | /* | |
379 | * Now that we have the variable-length data, we can allocate the | |
380 | * return buffer | |
381 | */ | |
382 | info = ACPI_ALLOCATE_ZEROED(info_size); | |
383 | if (!info) { | |
384 | status = AE_NO_MEMORY; | |
385 | goto cleanup; | |
386 | } | |
387 | ||
388 | /* Get the fixed-length data */ | |
389 | ||
390 | if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) { | |
391 | /* | |
392 | * Get extra info for ACPI Device/Processor objects only: | |
393 | * Run the _STA, _ADR and, sx_w, and _sx_d methods. | |
394 | * | |
a7d5caf6 | 395 | * Notes: none of these methods are required, so they may or may |
15b8dd53 BM |
396 | * not be present for this device. The Info->Valid bitfield is used |
397 | * to indicate which methods were found and run successfully. | |
a7d5caf6 BM |
398 | * |
399 | * For _STA, if the method does not exist, then (as per the ACPI | |
400 | * specification), the returned current_status flags will indicate | |
401 | * that the device is present/functional/enabled. Otherwise, the | |
402 | * current_status flags reflect the value returned from _STA. | |
15b8dd53 | 403 | */ |
1da177e4 LT |
404 | |
405 | /* Execute the Device._STA method */ | |
406 | ||
4be44fcd LB |
407 | status = acpi_ut_execute_STA(node, &info->current_status); |
408 | if (ACPI_SUCCESS(status)) { | |
15b8dd53 | 409 | valid |= ACPI_VALID_STA; |
1da177e4 LT |
410 | } |
411 | ||
412 | /* Execute the Device._ADR method */ | |
413 | ||
4be44fcd LB |
414 | status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node, |
415 | &info->address); | |
416 | if (ACPI_SUCCESS(status)) { | |
15b8dd53 BM |
417 | valid |= ACPI_VALID_ADR; |
418 | } | |
419 | ||
420 | /* Execute the Device._sx_w methods */ | |
421 | ||
422 | status = acpi_ut_execute_power_methods(node, | |
423 | acpi_gbl_lowest_dstate_names, | |
424 | ACPI_NUM_sx_w_METHODS, | |
425 | info->lowest_dstates); | |
426 | if (ACPI_SUCCESS(status)) { | |
427 | valid |= ACPI_VALID_SXWS; | |
1da177e4 LT |
428 | } |
429 | ||
430 | /* Execute the Device._sx_d methods */ | |
431 | ||
15b8dd53 BM |
432 | status = acpi_ut_execute_power_methods(node, |
433 | acpi_gbl_highest_dstate_names, | |
434 | ACPI_NUM_sx_d_METHODS, | |
435 | info->highest_dstates); | |
4be44fcd | 436 | if (ACPI_SUCCESS(status)) { |
15b8dd53 | 437 | valid |= ACPI_VALID_SXDS; |
1da177e4 LT |
438 | } |
439 | } | |
440 | ||
15b8dd53 BM |
441 | /* |
442 | * Create a pointer to the string area of the return buffer. | |
443 | * Point to the end of the base struct acpi_device_info structure. | |
444 | */ | |
445 | next_id_string = ACPI_CAST_PTR(char, info->compatible_id_list.ids); | |
446 | if (cid_list) { | |
1da177e4 | 447 | |
78e25fef | 448 | /* Point past the CID PNP_DEVICE_ID array */ |
15b8dd53 BM |
449 | |
450 | next_id_string += | |
f5c1e1c5 | 451 | ((acpi_size)cid_list->count * |
78e25fef | 452 | sizeof(struct acpi_pnp_device_id)); |
1da177e4 LT |
453 | } |
454 | ||
15b8dd53 | 455 | /* |
07cb390f BM |
456 | * Copy the HID, UID, and CIDs to the return buffer. The variable-length |
457 | * strings are copied to the reserved area at the end of the buffer. | |
15b8dd53 BM |
458 | * |
459 | * For HID and CID, check if the ID is a PCI Root Bridge. | |
460 | */ | |
461 | if (hid) { | |
462 | next_id_string = acpi_ns_copy_device_id(&info->hardware_id, | |
463 | hid, next_id_string); | |
464 | ||
465 | if (acpi_ut_is_pci_root_bridge(hid->string)) { | |
466 | info->flags |= ACPI_PCI_ROOT_BRIDGE; | |
467 | } | |
468 | } | |
1da177e4 | 469 | |
15b8dd53 BM |
470 | if (uid) { |
471 | next_id_string = acpi_ns_copy_device_id(&info->unique_id, | |
472 | uid, next_id_string); | |
473 | } | |
1da177e4 LT |
474 | |
475 | if (cid_list) { | |
15b8dd53 BM |
476 | info->compatible_id_list.count = cid_list->count; |
477 | info->compatible_id_list.list_size = cid_list->list_size; | |
478 | ||
479 | /* Copy each CID */ | |
480 | ||
481 | for (i = 0; i < cid_list->count; i++) { | |
482 | next_id_string = | |
483 | acpi_ns_copy_device_id(&info->compatible_id_list. | |
484 | ids[i], &cid_list->ids[i], | |
485 | next_id_string); | |
486 | ||
487 | if (acpi_ut_is_pci_root_bridge(cid_list->ids[i].string)) { | |
488 | info->flags |= ACPI_PCI_ROOT_BRIDGE; | |
489 | } | |
490 | } | |
1da177e4 LT |
491 | } |
492 | ||
f65358e5 SS |
493 | if (cls) { |
494 | next_id_string = acpi_ns_copy_device_id(&info->class_code, | |
495 | cls, next_id_string); | |
496 | } | |
497 | ||
15b8dd53 BM |
498 | /* Copy the fixed-length data */ |
499 | ||
500 | info->info_size = info_size; | |
501 | info->type = type; | |
502 | info->name = name; | |
503 | info->param_count = param_count; | |
504 | info->valid = valid; | |
505 | ||
506 | *return_buffer = info; | |
507 | status = AE_OK; | |
508 | ||
10622bf8 | 509 | cleanup: |
15b8dd53 BM |
510 | if (hid) { |
511 | ACPI_FREE(hid); | |
512 | } | |
513 | if (uid) { | |
514 | ACPI_FREE(uid); | |
515 | } | |
1da177e4 | 516 | if (cid_list) { |
8313524a | 517 | ACPI_FREE(cid_list); |
f65358e5 SS |
518 | } |
519 | if (cls) { | |
520 | ACPI_FREE(cls); | |
1da177e4 LT |
521 | } |
522 | return (status); | |
523 | } | |
1da177e4 | 524 | |
8313524a | 525 | ACPI_EXPORT_SYMBOL(acpi_get_object_info) |
b2f7ddcf LM |
526 | |
527 | /****************************************************************************** | |
528 | * | |
529 | * FUNCTION: acpi_install_method | |
530 | * | |
ba494bee | 531 | * PARAMETERS: buffer - An ACPI table containing one control method |
b2f7ddcf LM |
532 | * |
533 | * RETURN: Status | |
534 | * | |
535 | * DESCRIPTION: Install a control method into the namespace. If the method | |
536 | * name already exists in the namespace, it is overwritten. The | |
537 | * input buffer must contain a valid DSDT or SSDT containing a | |
538 | * single control method. | |
539 | * | |
540 | ******************************************************************************/ | |
541 | acpi_status acpi_install_method(u8 *buffer) | |
542 | { | |
543 | struct acpi_table_header *table = | |
544 | ACPI_CAST_PTR(struct acpi_table_header, buffer); | |
545 | u8 *aml_buffer; | |
546 | u8 *aml_start; | |
547 | char *path; | |
548 | struct acpi_namespace_node *node; | |
549 | union acpi_operand_object *method_obj; | |
550 | struct acpi_parse_state parser_state; | |
551 | u32 aml_length; | |
552 | u16 opcode; | |
553 | u8 method_flags; | |
554 | acpi_status status; | |
555 | ||
556 | /* Parameter validation */ | |
557 | ||
558 | if (!buffer) { | |
9c0d7939 | 559 | return (AE_BAD_PARAMETER); |
b2f7ddcf LM |
560 | } |
561 | ||
562 | /* Table must be a DSDT or SSDT */ | |
563 | ||
564 | if (!ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) && | |
565 | !ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) { | |
9c0d7939 | 566 | return (AE_BAD_HEADER); |
b2f7ddcf LM |
567 | } |
568 | ||
569 | /* First AML opcode in the table must be a control method */ | |
570 | ||
571 | parser_state.aml = buffer + sizeof(struct acpi_table_header); | |
572 | opcode = acpi_ps_peek_opcode(&parser_state); | |
573 | if (opcode != AML_METHOD_OP) { | |
9c0d7939 | 574 | return (AE_BAD_PARAMETER); |
b2f7ddcf LM |
575 | } |
576 | ||
577 | /* Extract method information from the raw AML */ | |
578 | ||
579 | parser_state.aml += acpi_ps_get_opcode_size(opcode); | |
580 | parser_state.pkg_end = acpi_ps_get_next_package_end(&parser_state); | |
581 | path = acpi_ps_get_next_namestring(&parser_state); | |
1fad8738 | 582 | |
b2f7ddcf LM |
583 | method_flags = *parser_state.aml++; |
584 | aml_start = parser_state.aml; | |
585 | aml_length = ACPI_PTR_DIFF(parser_state.pkg_end, aml_start); | |
586 | ||
587 | /* | |
588 | * Allocate resources up-front. We don't want to have to delete a new | |
589 | * node from the namespace if we cannot allocate memory. | |
590 | */ | |
591 | aml_buffer = ACPI_ALLOCATE(aml_length); | |
592 | if (!aml_buffer) { | |
9c0d7939 | 593 | return (AE_NO_MEMORY); |
b2f7ddcf LM |
594 | } |
595 | ||
596 | method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); | |
597 | if (!method_obj) { | |
598 | ACPI_FREE(aml_buffer); | |
9c0d7939 | 599 | return (AE_NO_MEMORY); |
b2f7ddcf LM |
600 | } |
601 | ||
602 | /* Lock namespace for acpi_ns_lookup, we may be creating a new node */ | |
603 | ||
604 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
605 | if (ACPI_FAILURE(status)) { | |
606 | goto error_exit; | |
607 | } | |
608 | ||
609 | /* The lookup either returns an existing node or creates a new one */ | |
610 | ||
611 | status = | |
612 | acpi_ns_lookup(NULL, path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, | |
613 | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, | |
614 | NULL, &node); | |
615 | ||
616 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
617 | ||
618 | if (ACPI_FAILURE(status)) { /* ns_lookup */ | |
619 | if (status != AE_ALREADY_EXISTS) { | |
620 | goto error_exit; | |
621 | } | |
622 | ||
623 | /* Node existed previously, make sure it is a method node */ | |
624 | ||
625 | if (node->type != ACPI_TYPE_METHOD) { | |
626 | status = AE_TYPE; | |
627 | goto error_exit; | |
628 | } | |
629 | } | |
630 | ||
631 | /* Copy the method AML to the local buffer */ | |
632 | ||
4fa4616e | 633 | memcpy(aml_buffer, aml_start, aml_length); |
b2f7ddcf LM |
634 | |
635 | /* Initialize the method object with the new method's information */ | |
636 | ||
637 | method_obj->method.aml_start = aml_buffer; | |
638 | method_obj->method.aml_length = aml_length; | |
639 | ||
640 | method_obj->method.param_count = (u8) | |
641 | (method_flags & AML_METHOD_ARG_COUNT); | |
642 | ||
b2f7ddcf | 643 | if (method_flags & AML_METHOD_SERIALIZED) { |
26294842 LM |
644 | method_obj->method.info_flags = ACPI_METHOD_SERIALIZED; |
645 | ||
b2f7ddcf LM |
646 | method_obj->method.sync_level = (u8) |
647 | ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4); | |
648 | } | |
649 | ||
650 | /* | |
651 | * Now that it is complete, we can attach the new method object to | |
652 | * the method Node (detaches/deletes any existing object) | |
653 | */ | |
654 | status = acpi_ns_attach_object(node, method_obj, ACPI_TYPE_METHOD); | |
655 | ||
656 | /* | |
657 | * Flag indicates AML buffer is dynamic, must be deleted later. | |
658 | * Must be set only after attach above. | |
659 | */ | |
660 | node->flags |= ANOBJ_ALLOCATED_BUFFER; | |
661 | ||
662 | /* Remove local reference to the method object */ | |
663 | ||
664 | acpi_ut_remove_reference(method_obj); | |
9c0d7939 | 665 | return (status); |
b2f7ddcf LM |
666 | |
667 | error_exit: | |
668 | ||
669 | ACPI_FREE(aml_buffer); | |
670 | ACPI_FREE(method_obj); | |
9c0d7939 | 671 | return (status); |
b2f7ddcf LM |
672 | } |
673 | ACPI_EXPORT_SYMBOL(acpi_install_method) |