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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxface - External interfaces for ACPI events | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
1da177e4 | 46 | #include <acpi/acpi.h> |
e2f7a777 LB |
47 | #include "accommon.h" |
48 | #include "acnamesp.h" | |
49 | #include "acevents.h" | |
50 | #include "acinterp.h" | |
1da177e4 LT |
51 | |
52 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 53 | ACPI_MODULE_NAME("evxface") |
0d0988af LZ |
54 | #if (!ACPI_REDUCED_HARDWARE) |
55 | /* Local prototypes */ | |
56 | static acpi_status | |
57 | acpi_ev_install_gpe_handler(acpi_handle gpe_device, | |
58 | u32 gpe_number, | |
59 | u32 type, | |
60 | u8 is_raw_handler, | |
61 | acpi_gpe_handler address, void *context); | |
62 | ||
63 | #endif | |
1da177e4 | 64 | |
1da177e4 LT |
65 | |
66 | /******************************************************************************* | |
67 | * | |
68 | * FUNCTION: acpi_install_notify_handler | |
69 | * | |
75c8044f | 70 | * PARAMETERS: device - The device for which notifies will be handled |
1da177e4 | 71 | * handler_type - The type of handler: |
86ed4bc8 BM |
72 | * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
73 | * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) | |
74 | * ACPI_ALL_NOTIFY: Both System and Device | |
75c8044f LZ |
75 | * handler - Address of the handler |
76 | * context - Value passed to the handler on each GPE | |
1da177e4 LT |
77 | * |
78 | * RETURN: Status | |
79 | * | |
86ed4bc8 BM |
80 | * DESCRIPTION: Install a handler for notifications on an ACPI Device, |
81 | * thermal_zone, or Processor object. | |
82 | * | |
83 | * NOTES: The Root namespace object may have only one handler for each | |
84 | * type of notify (System/Device). Device/Thermal/Processor objects | |
85 | * may have one device notify handler, and multiple system notify | |
86 | * handlers. | |
1da177e4 LT |
87 | * |
88 | ******************************************************************************/ | |
0d0988af | 89 | |
1da177e4 | 90 | acpi_status |
4be44fcd LB |
91 | acpi_install_notify_handler(acpi_handle device, |
92 | u32 handler_type, | |
93 | acpi_notify_handler handler, void *context) | |
1da177e4 | 94 | { |
86ed4bc8 BM |
95 | struct acpi_namespace_node *node = |
96 | ACPI_CAST_PTR(struct acpi_namespace_node, device); | |
4be44fcd | 97 | union acpi_operand_object *obj_desc; |
86ed4bc8 | 98 | union acpi_operand_object *handler_obj; |
4be44fcd | 99 | acpi_status status; |
86ed4bc8 | 100 | u32 i; |
1da177e4 | 101 | |
b229cf92 | 102 | ACPI_FUNCTION_TRACE(acpi_install_notify_handler); |
1da177e4 LT |
103 | |
104 | /* Parameter validation */ | |
105 | ||
86ed4bc8 BM |
106 | if ((!device) || (!handler) || (!handler_type) || |
107 | (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { | |
4be44fcd | 108 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
109 | } |
110 | ||
4be44fcd LB |
111 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
112 | if (ACPI_FAILURE(status)) { | |
113 | return_ACPI_STATUS(status); | |
1da177e4 LT |
114 | } |
115 | ||
1da177e4 LT |
116 | /* |
117 | * Root Object: | |
118 | * Registering a notify handler on the root object indicates that the | |
9f15fc66 | 119 | * caller wishes to receive notifications for all objects. Note that |
86ed4bc8 BM |
120 | * only one global handler can be registered per notify type. |
121 | * Ensure that a handler is not already installed. | |
1da177e4 LT |
122 | */ |
123 | if (device == ACPI_ROOT_OBJECT) { | |
86ed4bc8 BM |
124 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { |
125 | if (handler_type & (i + 1)) { | |
126 | if (acpi_gbl_global_notify[i].handler) { | |
127 | status = AE_ALREADY_EXISTS; | |
128 | goto unlock_and_exit; | |
129 | } | |
52fc0b02 | 130 | |
86ed4bc8 BM |
131 | acpi_gbl_global_notify[i].handler = handler; |
132 | acpi_gbl_global_notify[i].context = context; | |
133 | } | |
1da177e4 LT |
134 | } |
135 | ||
86ed4bc8 | 136 | goto unlock_and_exit; /* Global notify handler installed, all done */ |
1da177e4 LT |
137 | } |
138 | ||
139 | /* | |
140 | * All Other Objects: | |
86ed4bc8 BM |
141 | * Caller will only receive notifications specific to the target |
142 | * object. Note that only certain object types are allowed to | |
143 | * receive notifications. | |
1da177e4 | 144 | */ |
1da177e4 | 145 | |
86ed4bc8 | 146 | /* Are Notifies allowed on this object? */ |
1da177e4 | 147 | |
86ed4bc8 BM |
148 | if (!acpi_ev_is_notify_object(node)) { |
149 | status = AE_TYPE; | |
150 | goto unlock_and_exit; | |
151 | } | |
1da177e4 | 152 | |
86ed4bc8 | 153 | /* Check for an existing internal object, might not exist */ |
52fc0b02 | 154 | |
86ed4bc8 BM |
155 | obj_desc = acpi_ns_get_attached_object(node); |
156 | if (!obj_desc) { | |
1da177e4 | 157 | |
86ed4bc8 BM |
158 | /* Create a new object */ |
159 | ||
160 | obj_desc = acpi_ut_create_internal_object(node->type); | |
161 | if (!obj_desc) { | |
162 | status = AE_NO_MEMORY; | |
163 | goto unlock_and_exit; | |
164 | } | |
3f0be671 | 165 | |
86ed4bc8 | 166 | /* Attach new object to the Node, remove local reference */ |
3f0be671 | 167 | |
86ed4bc8 BM |
168 | status = acpi_ns_attach_object(device, obj_desc, node->type); |
169 | acpi_ut_remove_reference(obj_desc); | |
170 | if (ACPI_FAILURE(status)) { | |
171 | goto unlock_and_exit; | |
172 | } | |
173 | } | |
3f0be671 | 174 | |
86ed4bc8 BM |
175 | /* Ensure that the handler is not already installed in the lists */ |
176 | ||
177 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { | |
178 | if (handler_type & (i + 1)) { | |
179 | handler_obj = obj_desc->common_notify.notify_list[i]; | |
180 | while (handler_obj) { | |
181 | if (handler_obj->notify.handler == handler) { | |
3f0be671 RW |
182 | status = AE_ALREADY_EXISTS; |
183 | goto unlock_and_exit; | |
184 | } | |
185 | ||
86ed4bc8 | 186 | handler_obj = handler_obj->notify.next[i]; |
1da177e4 LT |
187 | } |
188 | } | |
86ed4bc8 | 189 | } |
1da177e4 | 190 | |
86ed4bc8 | 191 | /* Create and populate a new notify handler object */ |
1da177e4 | 192 | |
86ed4bc8 BM |
193 | handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); |
194 | if (!handler_obj) { | |
195 | status = AE_NO_MEMORY; | |
196 | goto unlock_and_exit; | |
197 | } | |
1da177e4 | 198 | |
86ed4bc8 BM |
199 | handler_obj->notify.node = node; |
200 | handler_obj->notify.handler_type = handler_type; | |
201 | handler_obj->notify.handler = handler; | |
202 | handler_obj->notify.context = context; | |
1da177e4 | 203 | |
86ed4bc8 | 204 | /* Install the handler at the list head(s) */ |
1da177e4 | 205 | |
86ed4bc8 BM |
206 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { |
207 | if (handler_type & (i + 1)) { | |
208 | handler_obj->notify.next[i] = | |
209 | obj_desc->common_notify.notify_list[i]; | |
1da177e4 | 210 | |
86ed4bc8 BM |
211 | obj_desc->common_notify.notify_list[i] = handler_obj; |
212 | } | |
213 | } | |
52fc0b02 | 214 | |
86ed4bc8 | 215 | /* Add an extra reference if handler was installed in both lists */ |
1da177e4 | 216 | |
86ed4bc8 BM |
217 | if (handler_type == ACPI_ALL_NOTIFY) { |
218 | acpi_ut_add_reference(handler_obj); | |
1da177e4 LT |
219 | } |
220 | ||
86ed4bc8 | 221 | unlock_and_exit: |
4be44fcd LB |
222 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
223 | return_ACPI_STATUS(status); | |
1da177e4 | 224 | } |
1da177e4 | 225 | |
8313524a | 226 | ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) |
1da177e4 LT |
227 | |
228 | /******************************************************************************* | |
229 | * | |
230 | * FUNCTION: acpi_remove_notify_handler | |
231 | * | |
75c8044f | 232 | * PARAMETERS: device - The device for which the handler is installed |
1da177e4 | 233 | * handler_type - The type of handler: |
86ed4bc8 BM |
234 | * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) |
235 | * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) | |
236 | * ACPI_ALL_NOTIFY: Both System and Device | |
75c8044f | 237 | * handler - Address of the handler |
1da177e4 LT |
238 | * |
239 | * RETURN: Status | |
240 | * | |
241 | * DESCRIPTION: Remove a handler for notifies on an ACPI device | |
242 | * | |
243 | ******************************************************************************/ | |
1da177e4 | 244 | acpi_status |
4be44fcd LB |
245 | acpi_remove_notify_handler(acpi_handle device, |
246 | u32 handler_type, acpi_notify_handler handler) | |
1da177e4 | 247 | { |
86ed4bc8 BM |
248 | struct acpi_namespace_node *node = |
249 | ACPI_CAST_PTR(struct acpi_namespace_node, device); | |
4be44fcd | 250 | union acpi_operand_object *obj_desc; |
86ed4bc8 BM |
251 | union acpi_operand_object *handler_obj; |
252 | union acpi_operand_object *previous_handler_obj; | |
69c841b6 | 253 | acpi_status status = AE_OK; |
86ed4bc8 | 254 | u32 i; |
1da177e4 | 255 | |
b229cf92 | 256 | ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); |
1da177e4 LT |
257 | |
258 | /* Parameter validation */ | |
259 | ||
86ed4bc8 BM |
260 | if ((!device) || (!handler) || (!handler_type) || |
261 | (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { | |
262 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 | 263 | } |
3e8214e5 | 264 | |
86ed4bc8 | 265 | /* Root Object. Global handlers are removed here */ |
1da177e4 LT |
266 | |
267 | if (device == ACPI_ROOT_OBJECT) { | |
86ed4bc8 BM |
268 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { |
269 | if (handler_type & (i + 1)) { | |
69c841b6 LZ |
270 | status = |
271 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
272 | if (ACPI_FAILURE(status)) { | |
273 | return_ACPI_STATUS(status); | |
274 | } | |
275 | ||
86ed4bc8 BM |
276 | if (!acpi_gbl_global_notify[i].handler || |
277 | (acpi_gbl_global_notify[i].handler != | |
278 | handler)) { | |
279 | status = AE_NOT_EXIST; | |
280 | goto unlock_and_exit; | |
281 | } | |
1da177e4 | 282 | |
86ed4bc8 BM |
283 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
284 | "Removing global notify handler\n")); | |
1da177e4 | 285 | |
86ed4bc8 BM |
286 | acpi_gbl_global_notify[i].handler = NULL; |
287 | acpi_gbl_global_notify[i].context = NULL; | |
69c841b6 LZ |
288 | |
289 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
290 | ||
291 | /* Make sure all deferred notify tasks are completed */ | |
292 | ||
293 | acpi_os_wait_events_complete(); | |
86ed4bc8 | 294 | } |
1da177e4 | 295 | } |
1da177e4 | 296 | |
69c841b6 | 297 | return_ACPI_STATUS(AE_OK); |
86ed4bc8 | 298 | } |
1da177e4 | 299 | |
86ed4bc8 | 300 | /* All other objects: Are Notifies allowed on this object? */ |
1da177e4 | 301 | |
86ed4bc8 | 302 | if (!acpi_ev_is_notify_object(node)) { |
69c841b6 | 303 | return_ACPI_STATUS(AE_TYPE); |
86ed4bc8 | 304 | } |
1da177e4 | 305 | |
86ed4bc8 | 306 | /* Must have an existing internal object */ |
1da177e4 | 307 | |
86ed4bc8 BM |
308 | obj_desc = acpi_ns_get_attached_object(node); |
309 | if (!obj_desc) { | |
69c841b6 | 310 | return_ACPI_STATUS(AE_NOT_EXIST); |
86ed4bc8 | 311 | } |
1da177e4 | 312 | |
86ed4bc8 | 313 | /* Internal object exists. Find the handler and remove it */ |
1da177e4 | 314 | |
86ed4bc8 BM |
315 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { |
316 | if (handler_type & (i + 1)) { | |
69c841b6 LZ |
317 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
318 | if (ACPI_FAILURE(status)) { | |
319 | return_ACPI_STATUS(status); | |
320 | } | |
321 | ||
86ed4bc8 BM |
322 | handler_obj = obj_desc->common_notify.notify_list[i]; |
323 | previous_handler_obj = NULL; | |
3f0be671 | 324 | |
86ed4bc8 | 325 | /* Attempt to find the handler in the handler list */ |
f6dd9221 | 326 | |
86ed4bc8 BM |
327 | while (handler_obj && |
328 | (handler_obj->notify.handler != handler)) { | |
329 | previous_handler_obj = handler_obj; | |
330 | handler_obj = handler_obj->notify.next[i]; | |
3f0be671 RW |
331 | } |
332 | ||
86ed4bc8 BM |
333 | if (!handler_obj) { |
334 | status = AE_NOT_EXIST; | |
f6dd9221 | 335 | goto unlock_and_exit; |
1da177e4 | 336 | } |
1da177e4 | 337 | |
86ed4bc8 | 338 | /* Remove the handler object from the list */ |
1da177e4 | 339 | |
86ed4bc8 BM |
340 | if (previous_handler_obj) { /* Handler is not at the list head */ |
341 | previous_handler_obj->notify.next[i] = | |
342 | handler_obj->notify.next[i]; | |
343 | } else { /* Handler is at the list head */ | |
f6dd9221 | 344 | |
86ed4bc8 BM |
345 | obj_desc->common_notify.notify_list[i] = |
346 | handler_obj->notify.next[i]; | |
1da177e4 | 347 | } |
1da177e4 | 348 | |
69c841b6 LZ |
349 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
350 | ||
351 | /* Make sure all deferred notify tasks are completed */ | |
352 | ||
353 | acpi_os_wait_events_complete(); | |
86ed4bc8 | 354 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
355 | } |
356 | } | |
357 | ||
69c841b6 LZ |
358 | return_ACPI_STATUS(status); |
359 | ||
86ed4bc8 | 360 | unlock_and_exit: |
4be44fcd LB |
361 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
362 | return_ACPI_STATUS(status); | |
1da177e4 | 363 | } |
1da177e4 | 364 | |
8313524a | 365 | ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) |
1da177e4 | 366 | |
33620c54 BM |
367 | /******************************************************************************* |
368 | * | |
369 | * FUNCTION: acpi_install_exception_handler | |
370 | * | |
ba494bee | 371 | * PARAMETERS: handler - Pointer to the handler function for the |
33620c54 BM |
372 | * event |
373 | * | |
374 | * RETURN: Status | |
375 | * | |
376 | * DESCRIPTION: Saves the pointer to the handler function | |
377 | * | |
378 | ******************************************************************************/ | |
379 | #ifdef ACPI_FUTURE_USAGE | |
380 | acpi_status acpi_install_exception_handler(acpi_exception_handler handler) | |
381 | { | |
382 | acpi_status status; | |
383 | ||
384 | ACPI_FUNCTION_TRACE(acpi_install_exception_handler); | |
385 | ||
386 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
387 | if (ACPI_FAILURE(status)) { | |
388 | return_ACPI_STATUS(status); | |
389 | } | |
390 | ||
391 | /* Don't allow two handlers. */ | |
392 | ||
393 | if (acpi_gbl_exception_handler) { | |
394 | status = AE_ALREADY_EXISTS; | |
395 | goto cleanup; | |
396 | } | |
397 | ||
398 | /* Install the handler */ | |
399 | ||
400 | acpi_gbl_exception_handler = handler; | |
401 | ||
10622bf8 | 402 | cleanup: |
33620c54 BM |
403 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
404 | return_ACPI_STATUS(status); | |
405 | } | |
406 | ||
407 | ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) | |
4d946f79 | 408 | #endif |
33620c54 BM |
409 | |
410 | #if (!ACPI_REDUCED_HARDWARE) | |
a2fd4b4b LZ |
411 | /******************************************************************************* |
412 | * | |
413 | * FUNCTION: acpi_install_sci_handler | |
414 | * | |
415 | * PARAMETERS: address - Address of the handler | |
416 | * context - Value passed to the handler on each SCI | |
417 | * | |
418 | * RETURN: Status | |
419 | * | |
420 | * DESCRIPTION: Install a handler for a System Control Interrupt. | |
421 | * | |
422 | ******************************************************************************/ | |
423 | acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context) | |
424 | { | |
425 | struct acpi_sci_handler_info *new_sci_handler; | |
426 | struct acpi_sci_handler_info *sci_handler; | |
427 | acpi_cpu_flags flags; | |
428 | acpi_status status; | |
429 | ||
430 | ACPI_FUNCTION_TRACE(acpi_install_sci_handler); | |
431 | ||
432 | if (!address) { | |
433 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
434 | } | |
435 | ||
436 | /* Allocate and init a handler object */ | |
437 | ||
438 | new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info)); | |
439 | if (!new_sci_handler) { | |
440 | return_ACPI_STATUS(AE_NO_MEMORY); | |
441 | } | |
442 | ||
443 | new_sci_handler->address = address; | |
444 | new_sci_handler->context = context; | |
445 | ||
446 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
447 | if (ACPI_FAILURE(status)) { | |
448 | goto exit; | |
449 | } | |
450 | ||
451 | /* Lock list during installation */ | |
452 | ||
453 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
454 | sci_handler = acpi_gbl_sci_handler_list; | |
455 | ||
456 | /* Ensure handler does not already exist */ | |
457 | ||
458 | while (sci_handler) { | |
459 | if (address == sci_handler->address) { | |
460 | status = AE_ALREADY_EXISTS; | |
461 | goto unlock_and_exit; | |
462 | } | |
463 | ||
464 | sci_handler = sci_handler->next; | |
465 | } | |
466 | ||
467 | /* Install the new handler into the global list (at head) */ | |
468 | ||
469 | new_sci_handler->next = acpi_gbl_sci_handler_list; | |
470 | acpi_gbl_sci_handler_list = new_sci_handler; | |
471 | ||
10622bf8 | 472 | unlock_and_exit: |
a2fd4b4b LZ |
473 | |
474 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
475 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
476 | ||
10622bf8 | 477 | exit: |
a2fd4b4b LZ |
478 | if (ACPI_FAILURE(status)) { |
479 | ACPI_FREE(new_sci_handler); | |
480 | } | |
481 | return_ACPI_STATUS(status); | |
482 | } | |
483 | ||
1d44efab BM |
484 | ACPI_EXPORT_SYMBOL(acpi_install_sci_handler) |
485 | ||
a2fd4b4b LZ |
486 | /******************************************************************************* |
487 | * | |
488 | * FUNCTION: acpi_remove_sci_handler | |
489 | * | |
490 | * PARAMETERS: address - Address of the handler | |
491 | * | |
492 | * RETURN: Status | |
493 | * | |
494 | * DESCRIPTION: Remove a handler for a System Control Interrupt. | |
495 | * | |
496 | ******************************************************************************/ | |
a2fd4b4b LZ |
497 | acpi_status acpi_remove_sci_handler(acpi_sci_handler address) |
498 | { | |
499 | struct acpi_sci_handler_info *prev_sci_handler; | |
500 | struct acpi_sci_handler_info *next_sci_handler; | |
501 | acpi_cpu_flags flags; | |
502 | acpi_status status; | |
503 | ||
504 | ACPI_FUNCTION_TRACE(acpi_remove_sci_handler); | |
505 | ||
506 | if (!address) { | |
507 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
508 | } | |
509 | ||
510 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
511 | if (ACPI_FAILURE(status)) { | |
512 | return_ACPI_STATUS(status); | |
513 | } | |
514 | ||
515 | /* Remove the SCI handler with lock */ | |
516 | ||
517 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
518 | ||
519 | prev_sci_handler = NULL; | |
520 | next_sci_handler = acpi_gbl_sci_handler_list; | |
521 | while (next_sci_handler) { | |
522 | if (next_sci_handler->address == address) { | |
523 | ||
524 | /* Unlink and free the SCI handler info block */ | |
525 | ||
526 | if (prev_sci_handler) { | |
527 | prev_sci_handler->next = next_sci_handler->next; | |
528 | } else { | |
529 | acpi_gbl_sci_handler_list = | |
530 | next_sci_handler->next; | |
531 | } | |
532 | ||
533 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
534 | ACPI_FREE(next_sci_handler); | |
535 | goto unlock_and_exit; | |
536 | } | |
537 | ||
538 | prev_sci_handler = next_sci_handler; | |
539 | next_sci_handler = next_sci_handler->next; | |
540 | } | |
541 | ||
542 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
543 | status = AE_NOT_EXIST; | |
544 | ||
10622bf8 | 545 | unlock_and_exit: |
a2fd4b4b LZ |
546 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
547 | return_ACPI_STATUS(status); | |
548 | } | |
549 | ||
1d44efab BM |
550 | ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler) |
551 | ||
33620c54 BM |
552 | /******************************************************************************* |
553 | * | |
554 | * FUNCTION: acpi_install_global_event_handler | |
555 | * | |
ba494bee BM |
556 | * PARAMETERS: handler - Pointer to the global event handler function |
557 | * context - Value passed to the handler on each event | |
33620c54 BM |
558 | * |
559 | * RETURN: Status | |
560 | * | |
561 | * DESCRIPTION: Saves the pointer to the handler function. The global handler | |
562 | * is invoked upon each incoming GPE and Fixed Event. It is | |
563 | * invoked at interrupt level at the time of the event dispatch. | |
564 | * Can be used to update event counters, etc. | |
565 | * | |
566 | ******************************************************************************/ | |
567 | acpi_status | |
644ef74e | 568 | acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context) |
33620c54 BM |
569 | { |
570 | acpi_status status; | |
571 | ||
572 | ACPI_FUNCTION_TRACE(acpi_install_global_event_handler); | |
573 | ||
574 | /* Parameter validation */ | |
575 | ||
576 | if (!handler) { | |
577 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
578 | } | |
579 | ||
580 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
581 | if (ACPI_FAILURE(status)) { | |
582 | return_ACPI_STATUS(status); | |
583 | } | |
584 | ||
585 | /* Don't allow two handlers. */ | |
586 | ||
587 | if (acpi_gbl_global_event_handler) { | |
588 | status = AE_ALREADY_EXISTS; | |
589 | goto cleanup; | |
590 | } | |
591 | ||
592 | acpi_gbl_global_event_handler = handler; | |
593 | acpi_gbl_global_event_handler_context = context; | |
594 | ||
10622bf8 | 595 | cleanup: |
33620c54 BM |
596 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
597 | return_ACPI_STATUS(status); | |
598 | } | |
599 | ||
600 | ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler) | |
601 | ||
602 | /******************************************************************************* | |
603 | * | |
604 | * FUNCTION: acpi_install_fixed_event_handler | |
605 | * | |
ba494bee BM |
606 | * PARAMETERS: event - Event type to enable. |
607 | * handler - Pointer to the handler function for the | |
33620c54 | 608 | * event |
ba494bee | 609 | * context - Value passed to the handler on each GPE |
33620c54 BM |
610 | * |
611 | * RETURN: Status | |
612 | * | |
613 | * DESCRIPTION: Saves the pointer to the handler function and then enables the | |
614 | * event. | |
615 | * | |
616 | ******************************************************************************/ | |
617 | acpi_status | |
618 | acpi_install_fixed_event_handler(u32 event, | |
619 | acpi_event_handler handler, void *context) | |
620 | { | |
621 | acpi_status status; | |
622 | ||
623 | ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); | |
624 | ||
625 | /* Parameter validation */ | |
626 | ||
627 | if (event > ACPI_EVENT_MAX) { | |
628 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
629 | } | |
630 | ||
631 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
632 | if (ACPI_FAILURE(status)) { | |
633 | return_ACPI_STATUS(status); | |
634 | } | |
635 | ||
d4d32195 | 636 | /* Do not allow multiple handlers */ |
33620c54 | 637 | |
d4d32195 | 638 | if (acpi_gbl_fixed_event_handlers[event].handler) { |
33620c54 BM |
639 | status = AE_ALREADY_EXISTS; |
640 | goto cleanup; | |
641 | } | |
642 | ||
643 | /* Install the handler before enabling the event */ | |
644 | ||
645 | acpi_gbl_fixed_event_handlers[event].handler = handler; | |
646 | acpi_gbl_fixed_event_handlers[event].context = context; | |
647 | ||
648 | status = acpi_clear_event(event); | |
649 | if (ACPI_SUCCESS(status)) | |
650 | status = acpi_enable_event(event, 0); | |
651 | if (ACPI_FAILURE(status)) { | |
d4d32195 BM |
652 | ACPI_WARNING((AE_INFO, |
653 | "Could not enable fixed event - %s (%u)", | |
654 | acpi_ut_get_event_name(event), event)); | |
33620c54 BM |
655 | |
656 | /* Remove the handler */ | |
657 | ||
658 | acpi_gbl_fixed_event_handlers[event].handler = NULL; | |
659 | acpi_gbl_fixed_event_handlers[event].context = NULL; | |
660 | } else { | |
661 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
d4d32195 BM |
662 | "Enabled fixed event %s (%X), Handler=%p\n", |
663 | acpi_ut_get_event_name(event), event, | |
33620c54 BM |
664 | handler)); |
665 | } | |
666 | ||
10622bf8 | 667 | cleanup: |
33620c54 BM |
668 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
669 | return_ACPI_STATUS(status); | |
670 | } | |
671 | ||
672 | ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) | |
673 | ||
674 | /******************************************************************************* | |
675 | * | |
676 | * FUNCTION: acpi_remove_fixed_event_handler | |
677 | * | |
ba494bee BM |
678 | * PARAMETERS: event - Event type to disable. |
679 | * handler - Address of the handler | |
33620c54 BM |
680 | * |
681 | * RETURN: Status | |
682 | * | |
683 | * DESCRIPTION: Disables the event and unregisters the event handler. | |
684 | * | |
685 | ******************************************************************************/ | |
686 | acpi_status | |
687 | acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) | |
688 | { | |
689 | acpi_status status = AE_OK; | |
690 | ||
691 | ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); | |
692 | ||
693 | /* Parameter validation */ | |
694 | ||
695 | if (event > ACPI_EVENT_MAX) { | |
696 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
697 | } | |
698 | ||
699 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
700 | if (ACPI_FAILURE(status)) { | |
701 | return_ACPI_STATUS(status); | |
702 | } | |
703 | ||
704 | /* Disable the event before removing the handler */ | |
705 | ||
706 | status = acpi_disable_event(event, 0); | |
707 | ||
708 | /* Always Remove the handler */ | |
709 | ||
710 | acpi_gbl_fixed_event_handlers[event].handler = NULL; | |
711 | acpi_gbl_fixed_event_handlers[event].context = NULL; | |
712 | ||
713 | if (ACPI_FAILURE(status)) { | |
714 | ACPI_WARNING((AE_INFO, | |
d4d32195 BM |
715 | "Could not disable fixed event - %s (%u)", |
716 | acpi_ut_get_event_name(event), event)); | |
33620c54 | 717 | } else { |
d4d32195 BM |
718 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
719 | "Disabled fixed event - %s (%X)\n", | |
720 | acpi_ut_get_event_name(event), event)); | |
33620c54 BM |
721 | } |
722 | ||
723 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
724 | return_ACPI_STATUS(status); | |
725 | } | |
726 | ||
727 | ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) | |
728 | ||
1da177e4 LT |
729 | /******************************************************************************* |
730 | * | |
0d0988af | 731 | * FUNCTION: acpi_ev_install_gpe_handler |
1da177e4 | 732 | * |
44f6c012 RM |
733 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
734 | * defined GPEs) | |
735 | * gpe_number - The GPE number within the GPE block | |
ba494bee | 736 | * type - Whether this GPE should be treated as an |
1da177e4 | 737 | * edge- or level-triggered interrupt. |
0d0988af LZ |
738 | * is_raw_handler - Whether this GPE should be handled using |
739 | * the special GPE handler mode. | |
ba494bee BM |
740 | * address - Address of the handler |
741 | * context - Value passed to the handler on each GPE | |
1da177e4 LT |
742 | * |
743 | * RETURN: Status | |
744 | * | |
0d0988af LZ |
745 | * DESCRIPTION: Internal function to install a handler for a General Purpose |
746 | * Event. | |
1da177e4 LT |
747 | * |
748 | ******************************************************************************/ | |
0d0988af LZ |
749 | static acpi_status |
750 | acpi_ev_install_gpe_handler(acpi_handle gpe_device, | |
751 | u32 gpe_number, | |
752 | u32 type, | |
753 | u8 is_raw_handler, | |
754 | acpi_gpe_handler address, void *context) | |
1da177e4 | 755 | { |
4be44fcd | 756 | struct acpi_gpe_event_info *gpe_event_info; |
8b6cd8ad | 757 | struct acpi_gpe_handler_info *handler; |
4be44fcd | 758 | acpi_status status; |
b8e4d893 | 759 | acpi_cpu_flags flags; |
1da177e4 | 760 | |
0d0988af | 761 | ACPI_FUNCTION_TRACE(ev_install_gpe_handler); |
1da177e4 LT |
762 | |
763 | /* Parameter validation */ | |
764 | ||
0f849d2c LM |
765 | if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) { |
766 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
767 | } |
768 | ||
4be44fcd LB |
769 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
770 | if (ACPI_FAILURE(status)) { | |
0f849d2c | 771 | return_ACPI_STATUS(status); |
1da177e4 LT |
772 | } |
773 | ||
75c8044f | 774 | /* Allocate and init handler object (before lock) */ |
28f4f8a9 | 775 | |
8b6cd8ad | 776 | handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info)); |
28f4f8a9 RW |
777 | if (!handler) { |
778 | status = AE_NO_MEMORY; | |
779 | goto unlock_and_exit; | |
780 | } | |
781 | ||
782 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
783 | ||
1da177e4 LT |
784 | /* Ensure that we have a valid GPE number */ |
785 | ||
4be44fcd | 786 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
787 | if (!gpe_event_info) { |
788 | status = AE_BAD_PARAMETER; | |
28f4f8a9 | 789 | goto free_and_exit; |
1da177e4 LT |
790 | } |
791 | ||
792 | /* Make sure that there isn't a handler there already */ | |
793 | ||
0d0988af LZ |
794 | if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
795 | ACPI_GPE_DISPATCH_HANDLER) || | |
796 | (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == | |
797 | ACPI_GPE_DISPATCH_RAW_HANDLER)) { | |
1da177e4 | 798 | status = AE_ALREADY_EXISTS; |
28f4f8a9 | 799 | goto free_and_exit; |
1da177e4 LT |
800 | } |
801 | ||
4be44fcd LB |
802 | handler->address = address; |
803 | handler->context = context; | |
1da177e4 | 804 | handler->method_node = gpe_event_info->dispatch.method_node; |
3e8214e5 LZ |
805 | handler->original_flags = (u8)(gpe_event_info->flags & |
806 | (ACPI_GPE_XRUPT_TYPE_MASK | | |
f19f1a7e | 807 | ACPI_GPE_DISPATCH_MASK)); |
28f4f8a9 RW |
808 | |
809 | /* | |
75c8044f | 810 | * If the GPE is associated with a method, it may have been enabled |
a2100801 RW |
811 | * automatically during initialization, in which case it has to be |
812 | * disabled now to avoid spurious execution of the handler. | |
28f4f8a9 | 813 | */ |
7c43312a LZ |
814 | if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == |
815 | ACPI_GPE_DISPATCH_METHOD) || | |
816 | (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == | |
817 | ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) { | |
437b7512 | 818 | handler->originally_enabled = TRUE; |
3a37898d | 819 | (void)acpi_ev_remove_gpe_reference(gpe_event_info); |
437b7512 LZ |
820 | |
821 | /* Sanity check of original type against new type */ | |
822 | ||
823 | if (type != | |
824 | (u32)(gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) { | |
825 | ACPI_WARNING((AE_INFO, | |
826 | "GPE type mismatch (level/edge)")); | |
827 | } | |
a2100801 | 828 | } |
1da177e4 | 829 | |
1da177e4 LT |
830 | /* Install the handler */ |
831 | ||
1da177e4 LT |
832 | gpe_event_info->dispatch.handler = handler; |
833 | ||
75c8044f | 834 | /* Setup up dispatch flags to indicate handler (vs. method/notify) */ |
1da177e4 | 835 | |
d4913dc6 BM |
836 | gpe_event_info->flags &= |
837 | ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); | |
0d0988af LZ |
838 | gpe_event_info->flags |= |
839 | (u8)(type | | |
840 | (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER : | |
841 | ACPI_GPE_DISPATCH_HANDLER)); | |
1da177e4 | 842 | |
4be44fcd | 843 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 844 | |
0f849d2c | 845 | unlock_and_exit: |
4be44fcd LB |
846 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
847 | return_ACPI_STATUS(status); | |
28f4f8a9 RW |
848 | |
849 | free_and_exit: | |
850 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
851 | ACPI_FREE(handler); | |
852 | goto unlock_and_exit; | |
1da177e4 | 853 | } |
1da177e4 | 854 | |
0d0988af LZ |
855 | /******************************************************************************* |
856 | * | |
857 | * FUNCTION: acpi_install_gpe_handler | |
858 | * | |
859 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT | |
860 | * defined GPEs) | |
861 | * gpe_number - The GPE number within the GPE block | |
862 | * type - Whether this GPE should be treated as an | |
863 | * edge- or level-triggered interrupt. | |
864 | * address - Address of the handler | |
865 | * context - Value passed to the handler on each GPE | |
866 | * | |
867 | * RETURN: Status | |
868 | * | |
869 | * DESCRIPTION: Install a handler for a General Purpose Event. | |
870 | * | |
871 | ******************************************************************************/ | |
872 | ||
873 | acpi_status | |
874 | acpi_install_gpe_handler(acpi_handle gpe_device, | |
875 | u32 gpe_number, | |
876 | u32 type, acpi_gpe_handler address, void *context) | |
877 | { | |
878 | acpi_status status; | |
879 | ||
880 | ACPI_FUNCTION_TRACE(acpi_install_gpe_handler); | |
881 | ||
1fad8738 BM |
882 | status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, |
883 | FALSE, address, context); | |
0d0988af LZ |
884 | |
885 | return_ACPI_STATUS(status); | |
886 | } | |
887 | ||
8313524a | 888 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) |
1da177e4 | 889 | |
0d0988af LZ |
890 | /******************************************************************************* |
891 | * | |
892 | * FUNCTION: acpi_install_gpe_raw_handler | |
893 | * | |
894 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT | |
895 | * defined GPEs) | |
896 | * gpe_number - The GPE number within the GPE block | |
897 | * type - Whether this GPE should be treated as an | |
898 | * edge- or level-triggered interrupt. | |
899 | * address - Address of the handler | |
900 | * context - Value passed to the handler on each GPE | |
901 | * | |
902 | * RETURN: Status | |
903 | * | |
904 | * DESCRIPTION: Install a handler for a General Purpose Event. | |
905 | * | |
906 | ******************************************************************************/ | |
907 | acpi_status | |
908 | acpi_install_gpe_raw_handler(acpi_handle gpe_device, | |
909 | u32 gpe_number, | |
910 | u32 type, acpi_gpe_handler address, void *context) | |
911 | { | |
912 | acpi_status status; | |
913 | ||
914 | ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler); | |
915 | ||
1fad8738 BM |
916 | status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, |
917 | TRUE, address, context); | |
0d0988af LZ |
918 | |
919 | return_ACPI_STATUS(status); | |
920 | } | |
921 | ||
922 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler) | |
923 | ||
1da177e4 LT |
924 | /******************************************************************************* |
925 | * | |
926 | * FUNCTION: acpi_remove_gpe_handler | |
927 | * | |
44f6c012 RM |
928 | * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT |
929 | * defined GPEs) | |
930 | * gpe_number - The event to remove a handler | |
ba494bee | 931 | * address - Address of the handler |
1da177e4 LT |
932 | * |
933 | * RETURN: Status | |
934 | * | |
935 | * DESCRIPTION: Remove a handler for a General Purpose acpi_event. | |
936 | * | |
937 | ******************************************************************************/ | |
1da177e4 | 938 | acpi_status |
4be44fcd | 939 | acpi_remove_gpe_handler(acpi_handle gpe_device, |
8b6cd8ad | 940 | u32 gpe_number, acpi_gpe_handler address) |
1da177e4 | 941 | { |
4be44fcd | 942 | struct acpi_gpe_event_info *gpe_event_info; |
8b6cd8ad | 943 | struct acpi_gpe_handler_info *handler; |
4be44fcd | 944 | acpi_status status; |
b8e4d893 | 945 | acpi_cpu_flags flags; |
1da177e4 | 946 | |
b229cf92 | 947 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler); |
1da177e4 LT |
948 | |
949 | /* Parameter validation */ | |
950 | ||
951 | if (!address) { | |
4be44fcd | 952 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
953 | } |
954 | ||
4be44fcd LB |
955 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
956 | if (ACPI_FAILURE(status)) { | |
957 | return_ACPI_STATUS(status); | |
1da177e4 LT |
958 | } |
959 | ||
28f4f8a9 RW |
960 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
961 | ||
1da177e4 LT |
962 | /* Ensure that we have a valid GPE number */ |
963 | ||
4be44fcd | 964 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
1da177e4 LT |
965 | if (!gpe_event_info) { |
966 | status = AE_BAD_PARAMETER; | |
967 | goto unlock_and_exit; | |
968 | } | |
969 | ||
970 | /* Make sure that a handler is indeed installed */ | |
971 | ||
0d0988af LZ |
972 | if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != |
973 | ACPI_GPE_DISPATCH_HANDLER) && | |
974 | (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != | |
975 | ACPI_GPE_DISPATCH_RAW_HANDLER)) { | |
1da177e4 LT |
976 | status = AE_NOT_EXIST; |
977 | goto unlock_and_exit; | |
978 | } | |
979 | ||
980 | /* Make sure that the installed handler is the same */ | |
981 | ||
982 | if (gpe_event_info->dispatch.handler->address != address) { | |
983 | status = AE_BAD_PARAMETER; | |
984 | goto unlock_and_exit; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | /* Remove the handler */ |
988 | ||
1da177e4 | 989 | handler = gpe_event_info->dispatch.handler; |
c539251e | 990 | gpe_event_info->dispatch.handler = NULL; |
1da177e4 LT |
991 | |
992 | /* Restore Method node (if any), set dispatch flags */ | |
993 | ||
994 | gpe_event_info->dispatch.method_node = handler->method_node; | |
28f4f8a9 | 995 | gpe_event_info->flags &= |
f19f1a7e | 996 | ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); |
3a37898d | 997 | gpe_event_info->flags |= handler->original_flags; |
28f4f8a9 RW |
998 | |
999 | /* | |
a2100801 RW |
1000 | * If the GPE was previously associated with a method and it was |
1001 | * enabled, it should be enabled at this point to restore the | |
1002 | * post-initialization configuration. | |
28f4f8a9 | 1003 | */ |
7c43312a LZ |
1004 | if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == |
1005 | ACPI_GPE_DISPATCH_METHOD) || | |
1006 | (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == | |
1007 | ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) { | |
3a37898d | 1008 | (void)acpi_ev_add_gpe_reference(gpe_event_info); |
3e8214e5 | 1009 | } |
1da177e4 | 1010 | |
69c841b6 LZ |
1011 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1012 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
1013 | ||
1014 | /* Make sure all deferred GPE tasks are completed */ | |
1015 | ||
1016 | acpi_os_wait_events_complete(); | |
1017 | ||
1da177e4 LT |
1018 | /* Now we can free the handler object */ |
1019 | ||
8313524a | 1020 | ACPI_FREE(handler); |
69c841b6 | 1021 | return_ACPI_STATUS(status); |
1da177e4 | 1022 | |
28f4f8a9 RW |
1023 | unlock_and_exit: |
1024 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
1025 | ||
4be44fcd LB |
1026 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
1027 | return_ACPI_STATUS(status); | |
1da177e4 | 1028 | } |
1da177e4 | 1029 | |
8313524a | 1030 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler) |
1da177e4 LT |
1031 | |
1032 | /******************************************************************************* | |
1033 | * | |
1034 | * FUNCTION: acpi_acquire_global_lock | |
1035 | * | |
ba494bee BM |
1036 | * PARAMETERS: timeout - How long the caller is willing to wait |
1037 | * handle - Where the handle to the lock is returned | |
44f6c012 | 1038 | * (if acquired) |
1da177e4 LT |
1039 | * |
1040 | * RETURN: Status | |
1041 | * | |
1042 | * DESCRIPTION: Acquire the ACPI Global Lock | |
1043 | * | |
ba886cd4 BM |
1044 | * Note: Allows callers with the same thread ID to acquire the global lock |
1045 | * multiple times. In other words, externally, the behavior of the global lock | |
1046 | * is identical to an AML mutex. On the first acquire, a new handle is | |
1047 | * returned. On any subsequent calls to acquire by the same thread, the same | |
1048 | * handle is returned. | |
1049 | * | |
1da177e4 | 1050 | ******************************************************************************/ |
f19f1a7e | 1051 | acpi_status acpi_acquire_global_lock(u16 timeout, u32 *handle) |
1da177e4 | 1052 | { |
4be44fcd | 1053 | acpi_status status; |
1da177e4 LT |
1054 | |
1055 | if (!handle) { | |
1056 | return (AE_BAD_PARAMETER); | |
1057 | } | |
1058 | ||
4d2acd9e | 1059 | /* Must lock interpreter to prevent race conditions */ |
1da177e4 | 1060 | |
4d2acd9e | 1061 | acpi_ex_enter_interpreter(); |
ba886cd4 BM |
1062 | |
1063 | status = acpi_ex_acquire_mutex_object(timeout, | |
1064 | acpi_gbl_global_lock_mutex, | |
1065 | acpi_os_get_thread_id()); | |
1da177e4 | 1066 | |
4be44fcd | 1067 | if (ACPI_SUCCESS(status)) { |
ba886cd4 | 1068 | |
e5567afa | 1069 | /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */ |
ba886cd4 | 1070 | |
1da177e4 LT |
1071 | *handle = acpi_gbl_global_lock_handle; |
1072 | } | |
1073 | ||
ba886cd4 | 1074 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
1075 | return (status); |
1076 | } | |
1da177e4 | 1077 | |
8313524a | 1078 | ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock) |
1da177e4 LT |
1079 | |
1080 | /******************************************************************************* | |
1081 | * | |
1082 | * FUNCTION: acpi_release_global_lock | |
1083 | * | |
ba494bee | 1084 | * PARAMETERS: handle - Returned from acpi_acquire_global_lock |
1da177e4 LT |
1085 | * |
1086 | * RETURN: Status | |
1087 | * | |
44f6c012 | 1088 | * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid. |
1da177e4 LT |
1089 | * |
1090 | ******************************************************************************/ | |
4be44fcd | 1091 | acpi_status acpi_release_global_lock(u32 handle) |
1da177e4 | 1092 | { |
4be44fcd | 1093 | acpi_status status; |
1da177e4 | 1094 | |
f02e9fa1 | 1095 | if (!handle || (handle != acpi_gbl_global_lock_handle)) { |
1da177e4 LT |
1096 | return (AE_NOT_ACQUIRED); |
1097 | } | |
1098 | ||
ba886cd4 | 1099 | status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex); |
1da177e4 LT |
1100 | return (status); |
1101 | } | |
1da177e4 | 1102 | |
8313524a | 1103 | ACPI_EXPORT_SYMBOL(acpi_release_global_lock) |
33620c54 | 1104 | #endif /* !ACPI_REDUCED_HARDWARE */ |