Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxface - External interfaces for ACPI events | |
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 "acevents.h" | |
48 | #include "acinterp.h" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evxface") |
1da177e4 LT |
52 | |
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_install_exception_handler | |
56 | * | |
57 | * PARAMETERS: Handler - Pointer to the handler function for the | |
58 | * event | |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
62 | * DESCRIPTION: Saves the pointer to the handler function | |
63 | * | |
64 | ******************************************************************************/ | |
65 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 66 | acpi_status acpi_install_exception_handler(acpi_exception_handler handler) |
1da177e4 | 67 | { |
4be44fcd | 68 | acpi_status status; |
1da177e4 | 69 | |
b229cf92 | 70 | ACPI_FUNCTION_TRACE(acpi_install_exception_handler); |
1da177e4 | 71 | |
4be44fcd LB |
72 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
73 | if (ACPI_FAILURE(status)) { | |
74 | return_ACPI_STATUS(status); | |
1da177e4 LT |
75 | } |
76 | ||
77 | /* Don't allow two handlers. */ | |
78 | ||
79 | if (acpi_gbl_exception_handler) { | |
80 | status = AE_ALREADY_EXISTS; | |
81 | goto cleanup; | |
82 | } | |
83 | ||
84 | /* Install the handler */ | |
85 | ||
86 | acpi_gbl_exception_handler = handler; | |
87 | ||
4be44fcd LB |
88 | cleanup: |
89 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
90 | return_ACPI_STATUS(status); | |
1da177e4 | 91 | } |
8313524a BM |
92 | |
93 | ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) | |
4be44fcd | 94 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
95 | /******************************************************************************* |
96 | * | |
97 | * FUNCTION: acpi_install_fixed_event_handler | |
98 | * | |
99 | * PARAMETERS: Event - Event type to enable. | |
100 | * Handler - Pointer to the handler function for the | |
101 | * event | |
102 | * Context - Value passed to the handler on each GPE | |
103 | * | |
104 | * RETURN: Status | |
105 | * | |
106 | * DESCRIPTION: Saves the pointer to the handler function and then enables the | |
107 | * event. | |
108 | * | |
109 | ******************************************************************************/ | |
1da177e4 | 110 | acpi_status |
4be44fcd LB |
111 | acpi_install_fixed_event_handler(u32 event, |
112 | acpi_event_handler handler, void *context) | |
1da177e4 | 113 | { |
4be44fcd | 114 | acpi_status status; |
1da177e4 | 115 | |
b229cf92 | 116 | ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); |
1da177e4 LT |
117 | |
118 | /* Parameter validation */ | |
119 | ||
120 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 121 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
122 | } |
123 | ||
4be44fcd LB |
124 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
125 | if (ACPI_FAILURE(status)) { | |
126 | return_ACPI_STATUS(status); | |
1da177e4 LT |
127 | } |
128 | ||
129 | /* Don't allow two handlers. */ | |
130 | ||
131 | if (NULL != acpi_gbl_fixed_event_handlers[event].handler) { | |
132 | status = AE_ALREADY_EXISTS; | |
133 | goto cleanup; | |
134 | } | |
135 | ||
136 | /* Install the handler before enabling the event */ | |
137 | ||
138 | acpi_gbl_fixed_event_handlers[event].handler = handler; | |
139 | acpi_gbl_fixed_event_handlers[event].context = context; | |
140 | ||
4be44fcd | 141 | status = acpi_clear_event(event); |
1da177e4 | 142 | if (ACPI_SUCCESS(status)) |
4be44fcd LB |
143 | status = acpi_enable_event(event, 0); |
144 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
145 | ACPI_WARNING((AE_INFO, "Could not enable fixed event %X", |
146 | event)); | |
1da177e4 LT |
147 | |
148 | /* Remove the handler */ | |
149 | ||
150 | acpi_gbl_fixed_event_handlers[event].handler = NULL; | |
151 | acpi_gbl_fixed_event_handlers[event].context = NULL; | |
4be44fcd LB |
152 | } else { |
153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
154 | "Enabled fixed event %X, Handler=%p\n", event, | |
155 | handler)); | |
1da177e4 LT |
156 | } |
157 | ||
4be44fcd LB |
158 | cleanup: |
159 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
160 | return_ACPI_STATUS(status); | |
1da177e4 | 161 | } |
1da177e4 | 162 | |
8313524a | 163 | ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) |
1da177e4 LT |
164 | |
165 | /******************************************************************************* | |
166 | * | |
167 | * FUNCTION: acpi_remove_fixed_event_handler | |
168 | * | |
169 | * PARAMETERS: Event - Event type to disable. | |
170 | * Handler - Address of the handler | |
171 | * | |
172 | * RETURN: Status | |
173 | * | |
174 | * DESCRIPTION: Disables the event and unregisters the event handler. | |
175 | * | |
176 | ******************************************************************************/ | |
1da177e4 | 177 | acpi_status |
4be44fcd | 178 | acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) |
1da177e4 | 179 | { |
4be44fcd | 180 | acpi_status status = AE_OK; |
1da177e4 | 181 | |
b229cf92 | 182 | ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); |
1da177e4 LT |
183 | |
184 | /* Parameter validation */ | |
185 | ||
186 | if (event > ACPI_EVENT_MAX) { | |
4be44fcd | 187 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
188 | } |
189 | ||
4be44fcd LB |
190 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
191 | if (ACPI_FAILURE(status)) { | |
192 | return_ACPI_STATUS(status); | |
1da177e4 LT |
193 | } |
194 | ||
195 | /* Disable the event before removing the handler */ | |
196 | ||
4be44fcd | 197 | status = acpi_disable_event(event, 0); |
1da177e4 LT |
198 | |
199 | /* Always Remove the handler */ | |
200 | ||
201 | acpi_gbl_fixed_event_handlers[event].handler = NULL; | |
202 | acpi_gbl_fixed_event_handlers[event].context = NULL; | |
203 | ||
4be44fcd | 204 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
205 | ACPI_WARNING((AE_INFO, |
206 | "Could not write to fixed event enable register %X", | |
207 | event)); | |
4be44fcd | 208 | } else { |
4a90c7e8 | 209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n", |
4be44fcd | 210 | event)); |
1da177e4 LT |
211 | } |
212 | ||
4be44fcd LB |
213 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
214 | return_ACPI_STATUS(status); | |
1da177e4 | 215 | } |
1da177e4 | 216 | |
8313524a | 217 | ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) |
1da177e4 LT |
218 | |
219 | /******************************************************************************* | |
220 | * | |
221 | * FUNCTION: acpi_install_notify_handler | |
222 | * | |
223 | * PARAMETERS: Device - The device for which notifies will be handled | |
224 | * handler_type - The type of handler: | |
225 | * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) | |
226 | * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) | |
227 | * ACPI_ALL_NOTIFY: both system and device | |
228 | * Handler - Address of the handler | |
229 | * Context - Value passed to the handler on each GPE | |
230 | * | |
231 | * RETURN: Status | |
232 | * | |
233 | * DESCRIPTION: Install a handler for notifies on an ACPI device | |
234 | * | |
235 | ******************************************************************************/ | |
1da177e4 | 236 | acpi_status |
4be44fcd LB |
237 | acpi_install_notify_handler(acpi_handle device, |
238 | u32 handler_type, | |
239 | acpi_notify_handler handler, void *context) | |
1da177e4 | 240 | { |
4be44fcd LB |
241 | union acpi_operand_object *obj_desc; |
242 | union acpi_operand_object *notify_obj; | |
243 | struct acpi_namespace_node *node; | |
244 | acpi_status status; | |
1da177e4 | 245 | |
b229cf92 | 246 | ACPI_FUNCTION_TRACE(acpi_install_notify_handler); |
1da177e4 LT |
247 | |
248 | /* Parameter validation */ | |
249 | ||
4be44fcd LB |
250 | if ((!device) || |
251 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { | |
252 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
253 | } |
254 | ||
4be44fcd LB |
255 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
256 | if (ACPI_FAILURE(status)) { | |
257 | return_ACPI_STATUS(status); | |
1da177e4 LT |
258 | } |
259 | ||
260 | /* Convert and validate the device handle */ | |
261 | ||
4be44fcd | 262 | node = acpi_ns_map_handle_to_node(device); |
1da177e4 LT |
263 | if (!node) { |
264 | status = AE_BAD_PARAMETER; | |
265 | goto unlock_and_exit; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Root Object: | |
270 | * Registering a notify handler on the root object indicates that the | |
9f15fc66 | 271 | * caller wishes to receive notifications for all objects. Note that |
1da177e4 LT |
272 | * only one <external> global handler can be regsitered (per notify type). |
273 | */ | |
274 | if (device == ACPI_ROOT_OBJECT) { | |
52fc0b02 | 275 | |
1da177e4 LT |
276 | /* Make sure the handler is not already installed */ |
277 | ||
278 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && | |
4be44fcd LB |
279 | acpi_gbl_system_notify.handler) || |
280 | ((handler_type & ACPI_DEVICE_NOTIFY) && | |
281 | acpi_gbl_device_notify.handler)) { | |
1da177e4 LT |
282 | status = AE_ALREADY_EXISTS; |
283 | goto unlock_and_exit; | |
284 | } | |
285 | ||
286 | if (handler_type & ACPI_SYSTEM_NOTIFY) { | |
4be44fcd | 287 | acpi_gbl_system_notify.node = node; |
1da177e4 LT |
288 | acpi_gbl_system_notify.handler = handler; |
289 | acpi_gbl_system_notify.context = context; | |
290 | } | |
291 | ||
292 | if (handler_type & ACPI_DEVICE_NOTIFY) { | |
4be44fcd | 293 | acpi_gbl_device_notify.node = node; |
1da177e4 LT |
294 | acpi_gbl_device_notify.handler = handler; |
295 | acpi_gbl_device_notify.context = context; | |
296 | } | |
297 | ||
298 | /* Global notify handler installed */ | |
299 | } | |
300 | ||
301 | /* | |
302 | * All Other Objects: | |
303 | * Caller will only receive notifications specific to the target object. | |
304 | * Note that only certain object types can receive notifications. | |
305 | */ | |
306 | else { | |
307 | /* Notifies allowed on this object? */ | |
308 | ||
4be44fcd | 309 | if (!acpi_ev_is_notify_object(node)) { |
1da177e4 LT |
310 | status = AE_TYPE; |
311 | goto unlock_and_exit; | |
312 | } | |
313 | ||
314 | /* Check for an existing internal object */ | |
315 | ||
4be44fcd | 316 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 317 | if (obj_desc) { |
52fc0b02 | 318 | |
1da177e4 LT |
319 | /* Object exists - make sure there's no handler */ |
320 | ||
321 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && | |
4be44fcd LB |
322 | obj_desc->common_notify.system_notify) || |
323 | ((handler_type & ACPI_DEVICE_NOTIFY) && | |
324 | obj_desc->common_notify.device_notify)) { | |
1da177e4 LT |
325 | status = AE_ALREADY_EXISTS; |
326 | goto unlock_and_exit; | |
327 | } | |
4be44fcd | 328 | } else { |
1da177e4 LT |
329 | /* Create a new object */ |
330 | ||
4be44fcd | 331 | obj_desc = acpi_ut_create_internal_object(node->type); |
1da177e4 LT |
332 | if (!obj_desc) { |
333 | status = AE_NO_MEMORY; | |
334 | goto unlock_and_exit; | |
335 | } | |
336 | ||
337 | /* Attach new object to the Node */ | |
338 | ||
4be44fcd LB |
339 | status = |
340 | acpi_ns_attach_object(device, obj_desc, node->type); | |
1da177e4 LT |
341 | |
342 | /* Remove local reference to the object */ | |
343 | ||
4be44fcd LB |
344 | acpi_ut_remove_reference(obj_desc); |
345 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
346 | goto unlock_and_exit; |
347 | } | |
348 | } | |
349 | ||
350 | /* Install the handler */ | |
351 | ||
4be44fcd LB |
352 | notify_obj = |
353 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); | |
1da177e4 LT |
354 | if (!notify_obj) { |
355 | status = AE_NO_MEMORY; | |
356 | goto unlock_and_exit; | |
357 | } | |
358 | ||
4be44fcd | 359 | notify_obj->notify.node = node; |
1da177e4 LT |
360 | notify_obj->notify.handler = handler; |
361 | notify_obj->notify.context = context; | |
362 | ||
363 | if (handler_type & ACPI_SYSTEM_NOTIFY) { | |
364 | obj_desc->common_notify.system_notify = notify_obj; | |
365 | } | |
366 | ||
367 | if (handler_type & ACPI_DEVICE_NOTIFY) { | |
368 | obj_desc->common_notify.device_notify = notify_obj; | |
369 | } | |
370 | ||
371 | if (handler_type == ACPI_ALL_NOTIFY) { | |
52fc0b02 | 372 | |
1da177e4 LT |
373 | /* Extra ref if installed in both */ |
374 | ||
4be44fcd | 375 | acpi_ut_add_reference(notify_obj); |
1da177e4 LT |
376 | } |
377 | } | |
378 | ||
4be44fcd LB |
379 | unlock_and_exit: |
380 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
381 | return_ACPI_STATUS(status); | |
1da177e4 | 382 | } |
1da177e4 | 383 | |
8313524a | 384 | ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) |
1da177e4 LT |
385 | |
386 | /******************************************************************************* | |
387 | * | |
388 | * FUNCTION: acpi_remove_notify_handler | |
389 | * | |
390 | * PARAMETERS: Device - The device for which notifies will be handled | |
391 | * handler_type - The type of handler: | |
392 | * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) | |
393 | * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) | |
394 | * ACPI_ALL_NOTIFY: both system and device | |
395 | * Handler - Address of the handler | |
396 | * | |
397 | * RETURN: Status | |
398 | * | |
399 | * DESCRIPTION: Remove a handler for notifies on an ACPI device | |
400 | * | |
401 | ******************************************************************************/ | |
1da177e4 | 402 | acpi_status |
4be44fcd LB |
403 | acpi_remove_notify_handler(acpi_handle device, |
404 | u32 handler_type, acpi_notify_handler handler) | |
1da177e4 | 405 | { |
4be44fcd LB |
406 | union acpi_operand_object *notify_obj; |
407 | union acpi_operand_object *obj_desc; | |
408 | struct acpi_namespace_node *node; | |
409 | acpi_status status; | |
1da177e4 | 410 | |
b229cf92 | 411 | ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); |
1da177e4 LT |
412 | |
413 | /* Parameter validation */ | |
414 | ||
4be44fcd LB |
415 | if ((!device) || |
416 | (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { | |
e8406b44 TR |
417 | status = AE_BAD_PARAMETER; |
418 | goto exit; | |
1da177e4 LT |
419 | } |
420 | ||
4be44fcd LB |
421 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
422 | if (ACPI_FAILURE(status)) { | |
e8406b44 | 423 | goto exit; |
1da177e4 LT |
424 | } |
425 | ||
426 | /* Convert and validate the device handle */ | |
427 | ||
4be44fcd | 428 | node = acpi_ns_map_handle_to_node(device); |
1da177e4 LT |
429 | if (!node) { |
430 | status = AE_BAD_PARAMETER; | |
f6dd9221 | 431 | goto unlock_and_exit; |
1da177e4 LT |
432 | } |
433 | ||
434 | /* Root Object */ | |
435 | ||
436 | if (device == ACPI_ROOT_OBJECT) { | |
4be44fcd | 437 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4a90c7e8 | 438 | "Removing notify handler for namespace root object\n")); |
1da177e4 LT |
439 | |
440 | if (((handler_type & ACPI_SYSTEM_NOTIFY) && | |
4be44fcd LB |
441 | !acpi_gbl_system_notify.handler) || |
442 | ((handler_type & ACPI_DEVICE_NOTIFY) && | |
443 | !acpi_gbl_device_notify.handler)) { | |
1da177e4 | 444 | status = AE_NOT_EXIST; |
f6dd9221 | 445 | goto unlock_and_exit; |
1da177e4 LT |
446 | } |
447 | ||
448 | /* Make sure all deferred tasks are completed */ | |
449 | ||
4be44fcd | 450 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 451 | acpi_os_wait_events_complete(NULL); |
4be44fcd LB |
452 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
453 | if (ACPI_FAILURE(status)) { | |
e8406b44 | 454 | goto exit; |
4be44fcd | 455 | } |
1da177e4 LT |
456 | |
457 | if (handler_type & ACPI_SYSTEM_NOTIFY) { | |
4be44fcd | 458 | acpi_gbl_system_notify.node = NULL; |
1da177e4 LT |
459 | acpi_gbl_system_notify.handler = NULL; |
460 | acpi_gbl_system_notify.context = NULL; | |
461 | } | |
462 | ||
463 | if (handler_type & ACPI_DEVICE_NOTIFY) { | |
4be44fcd | 464 | acpi_gbl_device_notify.node = NULL; |
1da177e4 LT |
465 | acpi_gbl_device_notify.handler = NULL; |
466 | acpi_gbl_device_notify.context = NULL; | |
467 | } | |
468 | } | |
469 | ||
470 | /* All Other Objects */ | |
471 | ||
472 | else { | |
473 | /* Notifies allowed on this object? */ | |
474 | ||
4be44fcd | 475 | if (!acpi_ev_is_notify_object(node)) { |
1da177e4 | 476 | status = AE_TYPE; |
f6dd9221 | 477 | goto unlock_and_exit; |
1da177e4 LT |
478 | } |
479 | ||
480 | /* Check for an existing internal object */ | |
481 | ||
4be44fcd | 482 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
483 | if (!obj_desc) { |
484 | status = AE_NOT_EXIST; | |
f6dd9221 | 485 | goto unlock_and_exit; |
1da177e4 LT |
486 | } |
487 | ||
488 | /* Object exists - make sure there's an existing handler */ | |
489 | ||
490 | if (handler_type & ACPI_SYSTEM_NOTIFY) { | |
491 | notify_obj = obj_desc->common_notify.system_notify; | |
f6dd9221 BM |
492 | if (!notify_obj) { |
493 | status = AE_NOT_EXIST; | |
494 | goto unlock_and_exit; | |
495 | } | |
496 | ||
497 | if (notify_obj->notify.handler != handler) { | |
1da177e4 | 498 | status = AE_BAD_PARAMETER; |
f6dd9221 | 499 | goto unlock_and_exit; |
1da177e4 LT |
500 | } |
501 | /* Make sure all deferred tasks are completed */ | |
502 | ||
4be44fcd | 503 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 504 | acpi_os_wait_events_complete(NULL); |
4be44fcd LB |
505 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
506 | if (ACPI_FAILURE(status)) { | |
e8406b44 | 507 | goto exit; |
4be44fcd | 508 | } |
1da177e4 LT |
509 | |
510 | /* Remove the handler */ | |
511 | obj_desc->common_notify.system_notify = NULL; | |
4be44fcd | 512 | acpi_ut_remove_reference(notify_obj); |
1da177e4 LT |
513 | } |
514 | ||
515 | if (handler_type & ACPI_DEVICE_NOTIFY) { | |
516 | notify_obj = obj_desc->common_notify.device_notify; | |
f6dd9221 BM |
517 | if (!notify_obj) { |
518 | status = AE_NOT_EXIST; | |
519 | goto unlock_and_exit; | |
520 | } | |
521 | ||
522 | if (notify_obj->notify.handler != handler) { | |
1da177e4 | 523 | status = AE_BAD_PARAMETER; |
f6dd9221 | 524 | goto unlock_and_exit; |
1da177e4 LT |
525 | } |
526 | /* Make sure all deferred tasks are completed */ | |
527 | ||
4be44fcd | 528 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
1da177e4 | 529 | acpi_os_wait_events_complete(NULL); |
4be44fcd LB |
530 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
531 | if (ACPI_FAILURE(status)) { | |
e8406b44 | 532 | goto exit; |
4be44fcd | 533 | } |
1da177e4 LT |
534 | |
535 | /* Remove the handler */ | |
536 | obj_desc->common_notify.device_notify = NULL; | |
4be44fcd | 537 | acpi_ut_remove_reference(notify_obj); |
1da177e4 LT |
538 | } |
539 | } | |
540 | ||
f6dd9221 | 541 | unlock_and_exit: |
4be44fcd | 542 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
f6dd9221 | 543 | exit: |
e8406b44 TR |
544 | if (ACPI_FAILURE(status)) |
545 | ACPI_EXCEPTION((AE_INFO, status, "Removing notify handler")); | |
4be44fcd | 546 | return_ACPI_STATUS(status); |
1da177e4 | 547 | } |
1da177e4 | 548 | |
8313524a | 549 | ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) |
1da177e4 LT |
550 | |
551 | /******************************************************************************* | |
552 | * | |
553 | * FUNCTION: acpi_install_gpe_handler | |
554 | * | |
44f6c012 RM |
555 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
556 | * defined GPEs) | |
557 | * gpe_number - The GPE number within the GPE block | |
1da177e4 LT |
558 | * Type - Whether this GPE should be treated as an |
559 | * edge- or level-triggered interrupt. | |
560 | * Address - Address of the handler | |
561 | * Context - Value passed to the handler on each GPE | |
562 | * | |
563 | * RETURN: Status | |
564 | * | |
565 | * DESCRIPTION: Install a handler for a General Purpose Event. | |
566 | * | |
567 | ******************************************************************************/ | |
1da177e4 | 568 | acpi_status |
4be44fcd LB |
569 | acpi_install_gpe_handler(acpi_handle gpe_device, |
570 | u32 gpe_number, | |
571 | u32 type, acpi_event_handler address, void *context) | |
1da177e4 | 572 | { |
4be44fcd LB |
573 | struct acpi_gpe_event_info *gpe_event_info; |
574 | struct acpi_handler_info *handler; | |
575 | acpi_status status; | |
b8e4d893 | 576 | acpi_cpu_flags flags; |
1da177e4 | 577 | |
b229cf92 | 578 | ACPI_FUNCTION_TRACE(acpi_install_gpe_handler); |
1da177e4 LT |
579 | |
580 | /* Parameter validation */ | |
581 | ||
582 | if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) { | |
e8406b44 TR |
583 | status = AE_BAD_PARAMETER; |
584 | goto exit; | |
1da177e4 LT |
585 | } |
586 | ||
4be44fcd LB |
587 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
588 | if (ACPI_FAILURE(status)) { | |
e8406b44 | 589 | goto exit; |
1da177e4 LT |
590 | } |
591 | ||
592 | /* Ensure that we have a valid GPE number */ | |
593 | ||
4be44fcd | 594 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
595 | if (!gpe_event_info) { |
596 | status = AE_BAD_PARAMETER; | |
f6dd9221 | 597 | goto unlock_and_exit; |
1da177e4 LT |
598 | } |
599 | ||
600 | /* Make sure that there isn't a handler there already */ | |
601 | ||
4be44fcd LB |
602 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
603 | ACPI_GPE_DISPATCH_HANDLER) { | |
1da177e4 | 604 | status = AE_ALREADY_EXISTS; |
f6dd9221 | 605 | goto unlock_and_exit; |
1da177e4 LT |
606 | } |
607 | ||
608 | /* Allocate and init handler object */ | |
609 | ||
8313524a | 610 | handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info)); |
1da177e4 LT |
611 | if (!handler) { |
612 | status = AE_NO_MEMORY; | |
f6dd9221 | 613 | goto unlock_and_exit; |
1da177e4 LT |
614 | } |
615 | ||
4be44fcd LB |
616 | handler->address = address; |
617 | handler->context = context; | |
1da177e4 LT |
618 | handler->method_node = gpe_event_info->dispatch.method_node; |
619 | ||
620 | /* Disable the GPE before installing the handler */ | |
621 | ||
4be44fcd LB |
622 | status = acpi_ev_disable_gpe(gpe_event_info); |
623 | if (ACPI_FAILURE(status)) { | |
f6dd9221 | 624 | goto unlock_and_exit; |
1da177e4 LT |
625 | } |
626 | ||
627 | /* Install the handler */ | |
628 | ||
4be44fcd | 629 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
630 | gpe_event_info->dispatch.handler = handler; |
631 | ||
632 | /* Setup up dispatch flags to indicate handler (vs. method) */ | |
633 | ||
d4913dc6 BM |
634 | gpe_event_info->flags &= |
635 | ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); | |
1da177e4 LT |
636 | gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER); |
637 | ||
4be44fcd | 638 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 639 | |
f6dd9221 | 640 | unlock_and_exit: |
4be44fcd | 641 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
f6dd9221 | 642 | exit: |
e8406b44 TR |
643 | if (ACPI_FAILURE(status)) |
644 | ACPI_EXCEPTION((AE_INFO, status, | |
645 | "Installing notify handler failed")); | |
4be44fcd | 646 | return_ACPI_STATUS(status); |
1da177e4 | 647 | } |
1da177e4 | 648 | |
8313524a | 649 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) |
1da177e4 LT |
650 | |
651 | /******************************************************************************* | |
652 | * | |
653 | * FUNCTION: acpi_remove_gpe_handler | |
654 | * | |
44f6c012 RM |
655 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
656 | * defined GPEs) | |
657 | * gpe_number - The event to remove a handler | |
1da177e4 LT |
658 | * Address - Address of the handler |
659 | * | |
660 | * RETURN: Status | |
661 | * | |
662 | * DESCRIPTION: Remove a handler for a General Purpose acpi_event. | |
663 | * | |
664 | ******************************************************************************/ | |
1da177e4 | 665 | acpi_status |
4be44fcd LB |
666 | acpi_remove_gpe_handler(acpi_handle gpe_device, |
667 | u32 gpe_number, acpi_event_handler address) | |
1da177e4 | 668 | { |
4be44fcd LB |
669 | struct acpi_gpe_event_info *gpe_event_info; |
670 | struct acpi_handler_info *handler; | |
671 | acpi_status status; | |
b8e4d893 | 672 | acpi_cpu_flags flags; |
1da177e4 | 673 | |
b229cf92 | 674 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler); |
1da177e4 LT |
675 | |
676 | /* Parameter validation */ | |
677 | ||
678 | if (!address) { | |
4be44fcd | 679 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
680 | } |
681 | ||
4be44fcd LB |
682 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
683 | if (ACPI_FAILURE(status)) { | |
684 | return_ACPI_STATUS(status); | |
1da177e4 LT |
685 | } |
686 | ||
687 | /* Ensure that we have a valid GPE number */ | |
688 | ||
4be44fcd | 689 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
690 | if (!gpe_event_info) { |
691 | status = AE_BAD_PARAMETER; | |
692 | goto unlock_and_exit; | |
693 | } | |
694 | ||
695 | /* Make sure that a handler is indeed installed */ | |
696 | ||
4be44fcd LB |
697 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != |
698 | ACPI_GPE_DISPATCH_HANDLER) { | |
1da177e4 LT |
699 | status = AE_NOT_EXIST; |
700 | goto unlock_and_exit; | |
701 | } | |
702 | ||
703 | /* Make sure that the installed handler is the same */ | |
704 | ||
705 | if (gpe_event_info->dispatch.handler->address != address) { | |
706 | status = AE_BAD_PARAMETER; | |
707 | goto unlock_and_exit; | |
708 | } | |
709 | ||
710 | /* Disable the GPE before removing the handler */ | |
711 | ||
4be44fcd LB |
712 | status = acpi_ev_disable_gpe(gpe_event_info); |
713 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
714 | goto unlock_and_exit; |
715 | } | |
716 | ||
717 | /* Make sure all deferred tasks are completed */ | |
718 | ||
4be44fcd | 719 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1da177e4 | 720 | acpi_os_wait_events_complete(NULL); |
4be44fcd LB |
721 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
722 | if (ACPI_FAILURE(status)) { | |
723 | return_ACPI_STATUS(status); | |
724 | } | |
1da177e4 LT |
725 | |
726 | /* Remove the handler */ | |
727 | ||
4be44fcd | 728 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
729 | handler = gpe_event_info->dispatch.handler; |
730 | ||
731 | /* Restore Method node (if any), set dispatch flags */ | |
732 | ||
733 | gpe_event_info->dispatch.method_node = handler->method_node; | |
4be44fcd | 734 | gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */ |
1da177e4 LT |
735 | if (handler->method_node) { |
736 | gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD; | |
737 | } | |
4be44fcd | 738 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
739 | |
740 | /* Now we can free the handler object */ | |
741 | ||
8313524a | 742 | ACPI_FREE(handler); |
1da177e4 | 743 | |
4be44fcd LB |
744 | unlock_and_exit: |
745 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
746 | return_ACPI_STATUS(status); | |
1da177e4 | 747 | } |
1da177e4 | 748 | |
8313524a | 749 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler) |
1da177e4 LT |
750 | |
751 | /******************************************************************************* | |
752 | * | |
753 | * FUNCTION: acpi_acquire_global_lock | |
754 | * | |
755 | * PARAMETERS: Timeout - How long the caller is willing to wait | |
44f6c012 RM |
756 | * Handle - Where the handle to the lock is returned |
757 | * (if acquired) | |
1da177e4 LT |
758 | * |
759 | * RETURN: Status | |
760 | * | |
761 | * DESCRIPTION: Acquire the ACPI Global Lock | |
762 | * | |
ba886cd4 BM |
763 | * Note: Allows callers with the same thread ID to acquire the global lock |
764 | * multiple times. In other words, externally, the behavior of the global lock | |
765 | * is identical to an AML mutex. On the first acquire, a new handle is | |
766 | * returned. On any subsequent calls to acquire by the same thread, the same | |
767 | * handle is returned. | |
768 | * | |
1da177e4 | 769 | ******************************************************************************/ |
4be44fcd | 770 | acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle) |
1da177e4 | 771 | { |
4be44fcd | 772 | acpi_status status; |
1da177e4 LT |
773 | |
774 | if (!handle) { | |
775 | return (AE_BAD_PARAMETER); | |
776 | } | |
777 | ||
4d2acd9e | 778 | /* Must lock interpreter to prevent race conditions */ |
1da177e4 | 779 | |
4d2acd9e | 780 | acpi_ex_enter_interpreter(); |
ba886cd4 BM |
781 | |
782 | status = acpi_ex_acquire_mutex_object(timeout, | |
783 | acpi_gbl_global_lock_mutex, | |
784 | acpi_os_get_thread_id()); | |
1da177e4 | 785 | |
4be44fcd | 786 | if (ACPI_SUCCESS(status)) { |
ba886cd4 | 787 | |
e5567afa | 788 | /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */ |
ba886cd4 | 789 | |
1da177e4 LT |
790 | *handle = acpi_gbl_global_lock_handle; |
791 | } | |
792 | ||
ba886cd4 | 793 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
794 | return (status); |
795 | } | |
1da177e4 | 796 | |
8313524a | 797 | ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock) |
1da177e4 LT |
798 | |
799 | /******************************************************************************* | |
800 | * | |
801 | * FUNCTION: acpi_release_global_lock | |
802 | * | |
803 | * PARAMETERS: Handle - Returned from acpi_acquire_global_lock | |
804 | * | |
805 | * RETURN: Status | |
806 | * | |
44f6c012 | 807 | * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
1da177e4 LT |
808 | * |
809 | ******************************************************************************/ | |
4be44fcd | 810 | acpi_status acpi_release_global_lock(u32 handle) |
1da177e4 | 811 | { |
4be44fcd | 812 | acpi_status status; |
1da177e4 | 813 | |
f02e9fa1 | 814 | if (!handle || (handle != acpi_gbl_global_lock_handle)) { |
1da177e4 LT |
815 | return (AE_NOT_ACQUIRED); |
816 | } | |
817 | ||
ba886cd4 | 818 | status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex); |
1da177e4 LT |
819 | return (status); |
820 | } | |
1da177e4 | 821 | |
8313524a | 822 | ACPI_EXPORT_SYMBOL(acpi_release_global_lock) |