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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
d978348b | 3 | * Module Name: utxface - External interfaces, miscellaneous utility functions |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
214f2c90 | 44 | #include <linux/export.h> |
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acevents.h" | |
48 | #include "acnamesp.h" | |
49 | #include "acdebug.h" | |
50 | #include "actables.h" | |
f654c0fe | 51 | #include "acinterp.h" |
1da177e4 LT |
52 | |
53 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 54 | ACPI_MODULE_NAME("utxface") |
1da177e4 | 55 | |
1da177e4 LT |
56 | /******************************************************************************* |
57 | * | |
58 | * FUNCTION: acpi_terminate | |
59 | * | |
60 | * PARAMETERS: None | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
2f977b36 | 64 | * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. |
1da177e4 LT |
65 | * |
66 | ******************************************************************************/ | |
4be44fcd | 67 | acpi_status acpi_terminate(void) |
1da177e4 | 68 | { |
4be44fcd | 69 | acpi_status status; |
1da177e4 | 70 | |
b229cf92 | 71 | ACPI_FUNCTION_TRACE(acpi_terminate); |
1da177e4 | 72 | |
2f977b36 BM |
73 | /* Just exit if subsystem is already shutdown */ |
74 | ||
75 | if (acpi_gbl_shutdown) { | |
76 | ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated")); | |
77 | return_ACPI_STATUS(AE_OK); | |
78 | } | |
79 | ||
80 | /* Subsystem appears active, go ahead and shut it down */ | |
81 | ||
82 | acpi_gbl_shutdown = TRUE; | |
83 | acpi_gbl_startup_flags = 0; | |
84 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n")); | |
85 | ||
1da177e4 LT |
86 | /* Terminate the AML Debugger if present */ |
87 | ||
88 | ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE); | |
89 | ||
90 | /* Shutdown and free all resources */ | |
91 | ||
4be44fcd | 92 | acpi_ut_subsystem_shutdown(); |
1da177e4 LT |
93 | |
94 | /* Free the mutex objects */ | |
95 | ||
4be44fcd | 96 | acpi_ut_mutex_terminate(); |
1da177e4 LT |
97 | |
98 | #ifdef ACPI_DEBUGGER | |
99 | ||
100 | /* Shut down the debugger */ | |
101 | ||
4be44fcd | 102 | acpi_db_terminate(); |
1da177e4 LT |
103 | #endif |
104 | ||
105 | /* Now we can shutdown the OS-dependent layer */ | |
106 | ||
4be44fcd LB |
107 | status = acpi_os_terminate(); |
108 | return_ACPI_STATUS(status); | |
1da177e4 LT |
109 | } |
110 | ||
8313524a | 111 | ACPI_EXPORT_SYMBOL(acpi_terminate) |
2f977b36 | 112 | |
e20a679b | 113 | #ifndef ACPI_ASL_COMPILER |
1da177e4 | 114 | #ifdef ACPI_FUTURE_USAGE |
44f6c012 | 115 | /******************************************************************************* |
1da177e4 LT |
116 | * |
117 | * FUNCTION: acpi_subsystem_status | |
118 | * | |
119 | * PARAMETERS: None | |
120 | * | |
121 | * RETURN: Status of the ACPI subsystem | |
122 | * | |
123 | * DESCRIPTION: Other drivers that use the ACPI subsystem should call this | |
44f6c012 RM |
124 | * before making any other calls, to ensure the subsystem |
125 | * initialized successfully. | |
1da177e4 | 126 | * |
44f6c012 | 127 | ******************************************************************************/ |
4be44fcd | 128 | acpi_status acpi_subsystem_status(void) |
1da177e4 | 129 | { |
44f6c012 | 130 | |
1da177e4 LT |
131 | if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) { |
132 | return (AE_OK); | |
4be44fcd | 133 | } else { |
1da177e4 LT |
134 | return (AE_ERROR); |
135 | } | |
136 | } | |
137 | ||
8313524a BM |
138 | ACPI_EXPORT_SYMBOL(acpi_subsystem_status) |
139 | ||
44f6c012 | 140 | /******************************************************************************* |
1da177e4 LT |
141 | * |
142 | * FUNCTION: acpi_get_system_info | |
143 | * | |
44f6c012 RM |
144 | * PARAMETERS: out_buffer - A buffer to receive the resources for the |
145 | * device | |
1da177e4 | 146 | * |
ba494bee | 147 | * RETURN: status - the status of the call |
1da177e4 LT |
148 | * |
149 | * DESCRIPTION: This function is called to get information about the current | |
73a3090a | 150 | * state of the ACPI subsystem. It will return system information |
1da177e4 LT |
151 | * in the out_buffer. |
152 | * | |
153 | * If the function fails an appropriate status will be returned | |
154 | * and the value of out_buffer is undefined. | |
155 | * | |
156 | ******************************************************************************/ | |
4be44fcd | 157 | acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer) |
1da177e4 | 158 | { |
4be44fcd LB |
159 | struct acpi_system_info *info_ptr; |
160 | acpi_status status; | |
1da177e4 | 161 | |
b229cf92 | 162 | ACPI_FUNCTION_TRACE(acpi_get_system_info); |
1da177e4 LT |
163 | |
164 | /* Parameter validation */ | |
165 | ||
4be44fcd LB |
166 | status = acpi_ut_validate_buffer(out_buffer); |
167 | if (ACPI_FAILURE(status)) { | |
168 | return_ACPI_STATUS(status); | |
1da177e4 LT |
169 | } |
170 | ||
171 | /* Validate/Allocate/Clear caller buffer */ | |
172 | ||
4be44fcd LB |
173 | status = |
174 | acpi_ut_initialize_buffer(out_buffer, | |
175 | sizeof(struct acpi_system_info)); | |
176 | if (ACPI_FAILURE(status)) { | |
177 | return_ACPI_STATUS(status); | |
1da177e4 LT |
178 | } |
179 | ||
180 | /* | |
181 | * Populate the return buffer | |
182 | */ | |
4be44fcd | 183 | info_ptr = (struct acpi_system_info *)out_buffer->pointer; |
1da177e4 | 184 | |
4be44fcd | 185 | info_ptr->acpi_ca_version = ACPI_CA_VERSION; |
1da177e4 LT |
186 | |
187 | /* System flags (ACPI capabilities) */ | |
188 | ||
4be44fcd | 189 | info_ptr->flags = ACPI_SYS_MODE_ACPI; |
1da177e4 LT |
190 | |
191 | /* Timer resolution - 24 or 32 bits */ | |
192 | ||
f3d2e786 | 193 | if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) { |
1da177e4 | 194 | info_ptr->timer_resolution = 24; |
4be44fcd | 195 | } else { |
1da177e4 LT |
196 | info_ptr->timer_resolution = 32; |
197 | } | |
198 | ||
199 | /* Clear the reserved fields */ | |
200 | ||
4be44fcd LB |
201 | info_ptr->reserved1 = 0; |
202 | info_ptr->reserved2 = 0; | |
1da177e4 LT |
203 | |
204 | /* Current debug levels */ | |
205 | ||
4be44fcd LB |
206 | info_ptr->debug_layer = acpi_dbg_layer; |
207 | info_ptr->debug_level = acpi_dbg_level; | |
1da177e4 | 208 | |
4be44fcd | 209 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 210 | } |
1da177e4 | 211 | |
8313524a | 212 | ACPI_EXPORT_SYMBOL(acpi_get_system_info) |
1da177e4 LT |
213 | |
214 | /***************************************************************************** | |
215 | * | |
216 | * FUNCTION: acpi_install_initialization_handler | |
217 | * | |
ba494bee BM |
218 | * PARAMETERS: handler - Callback procedure |
219 | * function - Not (currently) used, see below | |
1da177e4 LT |
220 | * |
221 | * RETURN: Status | |
222 | * | |
223 | * DESCRIPTION: Install an initialization handler | |
224 | * | |
225 | * TBD: When a second function is added, must save the Function also. | |
226 | * | |
227 | ****************************************************************************/ | |
1da177e4 | 228 | acpi_status |
4be44fcd | 229 | acpi_install_initialization_handler(acpi_init_handler handler, u32 function) |
1da177e4 LT |
230 | { |
231 | ||
232 | if (!handler) { | |
233 | return (AE_BAD_PARAMETER); | |
234 | } | |
235 | ||
236 | if (acpi_gbl_init_handler) { | |
237 | return (AE_ALREADY_EXISTS); | |
238 | } | |
239 | ||
240 | acpi_gbl_init_handler = handler; | |
68aafc35 | 241 | return (AE_OK); |
1da177e4 LT |
242 | } |
243 | ||
8313524a | 244 | ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler) |
4be44fcd | 245 | #endif /* ACPI_FUTURE_USAGE */ |
b0ed7a91 | 246 | |
1da177e4 LT |
247 | /***************************************************************************** |
248 | * | |
249 | * FUNCTION: acpi_purge_cached_objects | |
250 | * | |
251 | * PARAMETERS: None | |
252 | * | |
253 | * RETURN: Status | |
254 | * | |
255 | * DESCRIPTION: Empty all caches (delete the cached objects) | |
256 | * | |
257 | ****************************************************************************/ | |
4be44fcd | 258 | acpi_status acpi_purge_cached_objects(void) |
1da177e4 | 259 | { |
b229cf92 | 260 | ACPI_FUNCTION_TRACE(acpi_purge_cached_objects); |
1da177e4 | 261 | |
4be44fcd LB |
262 | (void)acpi_os_purge_cache(acpi_gbl_state_cache); |
263 | (void)acpi_os_purge_cache(acpi_gbl_operand_cache); | |
264 | (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache); | |
265 | (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache); | |
68aafc35 | 266 | |
4be44fcd | 267 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 268 | } |
8313524a BM |
269 | |
270 | ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects) | |
b0ed7a91 LM |
271 | |
272 | /***************************************************************************** | |
273 | * | |
274 | * FUNCTION: acpi_install_interface | |
275 | * | |
276 | * PARAMETERS: interface_name - The interface to install | |
277 | * | |
278 | * RETURN: Status | |
279 | * | |
280 | * DESCRIPTION: Install an _OSI interface to the global list | |
281 | * | |
282 | ****************************************************************************/ | |
283 | acpi_status acpi_install_interface(acpi_string interface_name) | |
284 | { | |
285 | acpi_status status; | |
286 | struct acpi_interface_info *interface_info; | |
287 | ||
288 | /* Parameter validation */ | |
289 | ||
290 | if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) { | |
291 | return (AE_BAD_PARAMETER); | |
292 | } | |
293 | ||
294 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
295 | ||
296 | /* Check if the interface name is already in the global list */ | |
297 | ||
298 | interface_info = acpi_ut_get_interface(interface_name); | |
299 | if (interface_info) { | |
300 | /* | |
301 | * The interface already exists in the list. This is OK if the | |
302 | * interface has been marked invalid -- just clear the bit. | |
303 | */ | |
304 | if (interface_info->flags & ACPI_OSI_INVALID) { | |
305 | interface_info->flags &= ~ACPI_OSI_INVALID; | |
306 | status = AE_OK; | |
307 | } else { | |
308 | status = AE_ALREADY_EXISTS; | |
309 | } | |
310 | } else { | |
311 | /* New interface name, install into the global list */ | |
312 | ||
313 | status = acpi_ut_install_interface(interface_name); | |
314 | } | |
315 | ||
316 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
317 | return (status); | |
318 | } | |
319 | ||
320 | ACPI_EXPORT_SYMBOL(acpi_install_interface) | |
321 | ||
322 | /***************************************************************************** | |
323 | * | |
324 | * FUNCTION: acpi_remove_interface | |
325 | * | |
326 | * PARAMETERS: interface_name - The interface to remove | |
327 | * | |
328 | * RETURN: Status | |
329 | * | |
330 | * DESCRIPTION: Remove an _OSI interface from the global list | |
331 | * | |
332 | ****************************************************************************/ | |
333 | acpi_status acpi_remove_interface(acpi_string interface_name) | |
334 | { | |
335 | acpi_status status; | |
336 | ||
337 | /* Parameter validation */ | |
338 | ||
339 | if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) { | |
340 | return (AE_BAD_PARAMETER); | |
341 | } | |
342 | ||
343 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
344 | ||
345 | status = acpi_ut_remove_interface(interface_name); | |
346 | ||
347 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
348 | return (status); | |
349 | } | |
350 | ||
351 | ACPI_EXPORT_SYMBOL(acpi_remove_interface) | |
352 | ||
353 | /***************************************************************************** | |
354 | * | |
355 | * FUNCTION: acpi_install_interface_handler | |
356 | * | |
ba494bee | 357 | * PARAMETERS: handler - The _OSI interface handler to install |
b0ed7a91 LM |
358 | * NULL means "remove existing handler" |
359 | * | |
360 | * RETURN: Status | |
361 | * | |
362 | * DESCRIPTION: Install a handler for the predefined _OSI ACPI method. | |
363 | * invoked during execution of the internal implementation of | |
364 | * _OSI. A NULL handler simply removes any existing handler. | |
365 | * | |
366 | ****************************************************************************/ | |
367 | acpi_status acpi_install_interface_handler(acpi_interface_handler handler) | |
368 | { | |
369 | acpi_status status = AE_OK; | |
370 | ||
371 | (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); | |
372 | ||
373 | if (handler && acpi_gbl_interface_handler) { | |
374 | status = AE_ALREADY_EXISTS; | |
375 | } else { | |
376 | acpi_gbl_interface_handler = handler; | |
377 | } | |
378 | ||
379 | acpi_os_release_mutex(acpi_gbl_osi_mutex); | |
380 | return (status); | |
381 | } | |
382 | ||
383 | ACPI_EXPORT_SYMBOL(acpi_install_interface_handler) | |
f654c0fe LM |
384 | |
385 | /***************************************************************************** | |
386 | * | |
387 | * FUNCTION: acpi_check_address_range | |
388 | * | |
389 | * PARAMETERS: space_id - Address space ID | |
ba494bee BM |
390 | * address - Start address |
391 | * length - Length | |
392 | * warn - TRUE if warning on overlap desired | |
f654c0fe LM |
393 | * |
394 | * RETURN: Count of the number of conflicts detected. | |
395 | * | |
396 | * DESCRIPTION: Check if the input address range overlaps any of the | |
397 | * ASL operation region address ranges. | |
398 | * | |
399 | ****************************************************************************/ | |
400 | u32 | |
401 | acpi_check_address_range(acpi_adr_space_type space_id, | |
402 | acpi_physical_address address, | |
403 | acpi_size length, u8 warn) | |
404 | { | |
405 | u32 overlaps; | |
406 | acpi_status status; | |
407 | ||
408 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
409 | if (ACPI_FAILURE(status)) { | |
410 | return (0); | |
411 | } | |
412 | ||
413 | overlaps = acpi_ut_check_address_range(space_id, address, | |
414 | (u32)length, warn); | |
415 | ||
416 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
417 | return (overlaps); | |
418 | } | |
419 | ||
420 | ACPI_EXPORT_SYMBOL(acpi_check_address_range) | |
b0ed7a91 | 421 | #endif /* !ACPI_ASL_COMPILER */ |
be030a57 BM |
422 | /******************************************************************************* |
423 | * | |
424 | * FUNCTION: acpi_decode_pld_buffer | |
425 | * | |
426 | * PARAMETERS: in_buffer - Buffer returned by _PLD method | |
427 | * length - Length of the in_buffer | |
428 | * return_buffer - Where the decode buffer is returned | |
429 | * | |
430 | * RETURN: Status and the decoded _PLD buffer. User must deallocate | |
431 | * the buffer via ACPI_FREE. | |
432 | * | |
433 | * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into | |
434 | * a local struct that is much more useful to an ACPI driver. | |
435 | * | |
436 | ******************************************************************************/ | |
437 | acpi_status | |
438 | acpi_decode_pld_buffer(u8 *in_buffer, | |
439 | acpi_size length, struct acpi_pld_info ** return_buffer) | |
440 | { | |
441 | struct acpi_pld_info *pld_info; | |
442 | u32 *buffer = ACPI_CAST_PTR(u32, in_buffer); | |
443 | u32 dword; | |
444 | ||
445 | /* Parameter validation */ | |
446 | ||
447 | if (!in_buffer || !return_buffer || (length < 16)) { | |
448 | return (AE_BAD_PARAMETER); | |
449 | } | |
450 | ||
451 | pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info)); | |
452 | if (!pld_info) { | |
453 | return (AE_NO_MEMORY); | |
454 | } | |
455 | ||
456 | /* First 32-bit DWord */ | |
457 | ||
458 | ACPI_MOVE_32_TO_32(&dword, &buffer[0]); | |
459 | pld_info->revision = ACPI_PLD_GET_REVISION(&dword); | |
460 | pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword); | |
461 | pld_info->color = ACPI_PLD_GET_COLOR(&dword); | |
462 | ||
463 | /* Second 32-bit DWord */ | |
464 | ||
465 | ACPI_MOVE_32_TO_32(&dword, &buffer[1]); | |
466 | pld_info->width = ACPI_PLD_GET_WIDTH(&dword); | |
467 | pld_info->height = ACPI_PLD_GET_HEIGHT(&dword); | |
468 | ||
469 | /* Third 32-bit DWord */ | |
470 | ||
471 | ACPI_MOVE_32_TO_32(&dword, &buffer[2]); | |
472 | pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword); | |
473 | pld_info->dock = ACPI_PLD_GET_DOCK(&dword); | |
474 | pld_info->lid = ACPI_PLD_GET_LID(&dword); | |
475 | pld_info->panel = ACPI_PLD_GET_PANEL(&dword); | |
476 | pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword); | |
477 | pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword); | |
478 | pld_info->shape = ACPI_PLD_GET_SHAPE(&dword); | |
479 | pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword); | |
480 | pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword); | |
481 | pld_info->group_position = ACPI_PLD_GET_POSITION(&dword); | |
482 | pld_info->bay = ACPI_PLD_GET_BAY(&dword); | |
483 | ||
484 | /* Fourth 32-bit DWord */ | |
485 | ||
486 | ACPI_MOVE_32_TO_32(&dword, &buffer[3]); | |
487 | pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword); | |
488 | pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword); | |
489 | pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword); | |
490 | pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword); | |
491 | pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword); | |
492 | pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword); | |
493 | pld_info->order = ACPI_PLD_GET_ORDER(&dword); | |
494 | ||
495 | if (length >= ACPI_PLD_BUFFER_SIZE) { | |
496 | ||
497 | /* Fifth 32-bit DWord (Revision 2 of _PLD) */ | |
498 | ||
499 | ACPI_MOVE_32_TO_32(&dword, &buffer[4]); | |
500 | pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword); | |
501 | pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword); | |
502 | } | |
503 | ||
504 | *return_buffer = pld_info; | |
505 | return (AE_OK); | |
506 | } | |
507 | ||
508 | ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer) |