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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpe - General Purpose Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
44 | #include <acpi/acpi.h> | |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | ||
48 | #define _COMPONENT ACPI_EVENTS | |
49 | ACPI_MODULE_NAME ("evgpe") | |
50 | ||
44f6c012 RM |
51 | /* Local prototypes */ |
52 | ||
53 | static void ACPI_SYSTEM_XFACE | |
54 | acpi_ev_asynch_execute_gpe_method ( | |
55 | void *context); | |
56 | ||
1da177e4 LT |
57 | |
58 | /******************************************************************************* | |
59 | * | |
60 | * FUNCTION: acpi_ev_set_gpe_type | |
61 | * | |
62 | * PARAMETERS: gpe_event_info - GPE to set | |
63 | * Type - New type | |
64 | * | |
65 | * RETURN: Status | |
66 | * | |
67 | * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) | |
68 | * | |
69 | ******************************************************************************/ | |
70 | ||
71 | acpi_status | |
72 | acpi_ev_set_gpe_type ( | |
73 | struct acpi_gpe_event_info *gpe_event_info, | |
74 | u8 type) | |
75 | { | |
76 | acpi_status status; | |
77 | ||
78 | ||
79 | ACPI_FUNCTION_TRACE ("ev_set_gpe_type"); | |
80 | ||
81 | ||
82 | /* Validate type and update register enable masks */ | |
83 | ||
84 | switch (type) { | |
85 | case ACPI_GPE_TYPE_WAKE: | |
86 | case ACPI_GPE_TYPE_RUNTIME: | |
87 | case ACPI_GPE_TYPE_WAKE_RUN: | |
88 | break; | |
89 | ||
90 | default: | |
91 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
92 | } | |
93 | ||
94 | /* Disable the GPE if currently enabled */ | |
95 | ||
96 | status = acpi_ev_disable_gpe (gpe_event_info); | |
97 | ||
98 | /* Type was validated above */ | |
99 | ||
100 | gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ | |
101 | gpe_event_info->flags |= type; /* Insert type */ | |
102 | return_ACPI_STATUS (status); | |
103 | } | |
104 | ||
105 | ||
106 | /******************************************************************************* | |
107 | * | |
108 | * FUNCTION: acpi_ev_update_gpe_enable_masks | |
109 | * | |
110 | * PARAMETERS: gpe_event_info - GPE to update | |
111 | * Type - What to do: ACPI_GPE_DISABLE or | |
112 | * ACPI_GPE_ENABLE | |
113 | * | |
114 | * RETURN: Status | |
115 | * | |
116 | * DESCRIPTION: Updates GPE register enable masks based on the GPE type | |
117 | * | |
118 | ******************************************************************************/ | |
119 | ||
120 | acpi_status | |
121 | acpi_ev_update_gpe_enable_masks ( | |
122 | struct acpi_gpe_event_info *gpe_event_info, | |
123 | u8 type) | |
124 | { | |
125 | struct acpi_gpe_register_info *gpe_register_info; | |
126 | u8 register_bit; | |
127 | ||
128 | ||
129 | ACPI_FUNCTION_TRACE ("ev_update_gpe_enable_masks"); | |
130 | ||
131 | ||
132 | gpe_register_info = gpe_event_info->register_info; | |
133 | if (!gpe_register_info) { | |
134 | return_ACPI_STATUS (AE_NOT_EXIST); | |
135 | } | |
136 | register_bit = gpe_event_info->register_bit; | |
137 | ||
138 | /* 1) Disable case. Simply clear all enable bits */ | |
139 | ||
140 | if (type == ACPI_GPE_DISABLE) { | |
141 | ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit); | |
142 | ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit); | |
143 | return_ACPI_STATUS (AE_OK); | |
144 | } | |
145 | ||
146 | /* 2) Enable case. Set/Clear the appropriate enable bits */ | |
147 | ||
148 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
149 | case ACPI_GPE_TYPE_WAKE: | |
150 | ACPI_SET_BIT (gpe_register_info->enable_for_wake, register_bit); | |
151 | ACPI_CLEAR_BIT (gpe_register_info->enable_for_run, register_bit); | |
152 | break; | |
153 | ||
154 | case ACPI_GPE_TYPE_RUNTIME: | |
155 | ACPI_CLEAR_BIT (gpe_register_info->enable_for_wake, register_bit); | |
156 | ACPI_SET_BIT (gpe_register_info->enable_for_run, register_bit); | |
157 | break; | |
158 | ||
159 | case ACPI_GPE_TYPE_WAKE_RUN: | |
160 | ACPI_SET_BIT (gpe_register_info->enable_for_wake, register_bit); | |
161 | ACPI_SET_BIT (gpe_register_info->enable_for_run, register_bit); | |
162 | break; | |
163 | ||
164 | default: | |
165 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
166 | } | |
167 | ||
168 | return_ACPI_STATUS (AE_OK); | |
169 | } | |
170 | ||
171 | ||
172 | /******************************************************************************* | |
173 | * | |
174 | * FUNCTION: acpi_ev_enable_gpe | |
175 | * | |
176 | * PARAMETERS: gpe_event_info - GPE to enable | |
177 | * write_to_hardware - Enable now, or just mark data structs | |
178 | * (WAKE GPEs should be deferred) | |
179 | * | |
180 | * RETURN: Status | |
181 | * | |
182 | * DESCRIPTION: Enable a GPE based on the GPE type | |
183 | * | |
184 | ******************************************************************************/ | |
185 | ||
186 | acpi_status | |
187 | acpi_ev_enable_gpe ( | |
188 | struct acpi_gpe_event_info *gpe_event_info, | |
189 | u8 write_to_hardware) | |
190 | { | |
191 | acpi_status status; | |
192 | ||
193 | ||
194 | ACPI_FUNCTION_TRACE ("ev_enable_gpe"); | |
195 | ||
196 | ||
197 | /* Make sure HW enable masks are updated */ | |
198 | ||
199 | status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_ENABLE); | |
200 | if (ACPI_FAILURE (status)) { | |
201 | return_ACPI_STATUS (status); | |
202 | } | |
203 | ||
204 | /* Mark wake-enabled or HW enable, or both */ | |
205 | ||
206 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
207 | case ACPI_GPE_TYPE_WAKE: | |
208 | ||
209 | ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); | |
210 | break; | |
211 | ||
212 | case ACPI_GPE_TYPE_WAKE_RUN: | |
213 | ||
214 | ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); | |
215 | ||
216 | /*lint -fallthrough */ | |
217 | ||
218 | case ACPI_GPE_TYPE_RUNTIME: | |
219 | ||
220 | ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); | |
221 | ||
222 | if (write_to_hardware) { | |
223 | /* Clear the GPE (of stale events), then enable it */ | |
224 | ||
225 | status = acpi_hw_clear_gpe (gpe_event_info); | |
226 | if (ACPI_FAILURE (status)) { | |
227 | return_ACPI_STATUS (status); | |
228 | } | |
229 | ||
230 | /* Enable the requested runtime GPE */ | |
231 | ||
232 | status = acpi_hw_write_gpe_enable_reg (gpe_event_info); | |
233 | } | |
234 | break; | |
235 | ||
236 | default: | |
237 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
238 | } | |
239 | ||
240 | return_ACPI_STATUS (AE_OK); | |
241 | } | |
242 | ||
243 | ||
244 | /******************************************************************************* | |
245 | * | |
246 | * FUNCTION: acpi_ev_disable_gpe | |
247 | * | |
248 | * PARAMETERS: gpe_event_info - GPE to disable | |
249 | * | |
250 | * RETURN: Status | |
251 | * | |
252 | * DESCRIPTION: Disable a GPE based on the GPE type | |
253 | * | |
254 | ******************************************************************************/ | |
255 | ||
256 | acpi_status | |
257 | acpi_ev_disable_gpe ( | |
258 | struct acpi_gpe_event_info *gpe_event_info) | |
259 | { | |
260 | acpi_status status; | |
261 | ||
262 | ||
263 | ACPI_FUNCTION_TRACE ("ev_disable_gpe"); | |
264 | ||
265 | ||
266 | if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) { | |
267 | return_ACPI_STATUS (AE_OK); | |
268 | } | |
269 | ||
270 | /* Make sure HW enable masks are updated */ | |
271 | ||
272 | status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_DISABLE); | |
273 | if (ACPI_FAILURE (status)) { | |
274 | return_ACPI_STATUS (status); | |
275 | } | |
276 | ||
277 | /* Mark wake-disabled or HW disable, or both */ | |
278 | ||
279 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
280 | case ACPI_GPE_TYPE_WAKE: | |
281 | ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); | |
282 | break; | |
283 | ||
284 | case ACPI_GPE_TYPE_WAKE_RUN: | |
285 | ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); | |
286 | ||
287 | /*lint -fallthrough */ | |
288 | ||
289 | case ACPI_GPE_TYPE_RUNTIME: | |
290 | ||
291 | /* Disable the requested runtime GPE */ | |
292 | ||
293 | ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); | |
294 | status = acpi_hw_write_gpe_enable_reg (gpe_event_info); | |
295 | break; | |
296 | ||
297 | default: | |
298 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
299 | } | |
300 | ||
301 | return_ACPI_STATUS (AE_OK); | |
302 | } | |
303 | ||
304 | ||
305 | /******************************************************************************* | |
306 | * | |
307 | * FUNCTION: acpi_ev_get_gpe_event_info | |
308 | * | |
309 | * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 | |
310 | * gpe_number - Raw GPE number | |
311 | * | |
312 | * RETURN: A GPE event_info struct. NULL if not a valid GPE | |
313 | * | |
314 | * DESCRIPTION: Returns the event_info struct associated with this GPE. | |
315 | * Validates the gpe_block and the gpe_number | |
316 | * | |
317 | * Should be called only when the GPE lists are semaphore locked | |
318 | * and not subject to change. | |
319 | * | |
320 | ******************************************************************************/ | |
321 | ||
322 | struct acpi_gpe_event_info * | |
323 | acpi_ev_get_gpe_event_info ( | |
324 | acpi_handle gpe_device, | |
325 | u32 gpe_number) | |
326 | { | |
327 | union acpi_operand_object *obj_desc; | |
328 | struct acpi_gpe_block_info *gpe_block; | |
329 | acpi_native_uint i; | |
330 | ||
331 | ||
332 | ACPI_FUNCTION_ENTRY (); | |
333 | ||
334 | ||
335 | /* A NULL gpe_block means use the FADT-defined GPE block(s) */ | |
336 | ||
337 | if (!gpe_device) { | |
338 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ | |
339 | ||
340 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { | |
341 | gpe_block = acpi_gbl_gpe_fadt_blocks[i]; | |
342 | if (gpe_block) { | |
343 | if ((gpe_number >= gpe_block->block_base_number) && | |
44f6c012 RM |
344 | (gpe_number < gpe_block->block_base_number + |
345 | (gpe_block->register_count * 8))) { | |
346 | return (&gpe_block->event_info[gpe_number - | |
347 | gpe_block->block_base_number]); | |
1da177e4 LT |
348 | } |
349 | } | |
350 | } | |
351 | ||
352 | /* The gpe_number was not in the range of either FADT GPE block */ | |
353 | ||
354 | return (NULL); | |
355 | } | |
356 | ||
357 | /* A Non-NULL gpe_device means this is a GPE Block Device */ | |
358 | ||
359 | obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) gpe_device); | |
360 | if (!obj_desc || | |
361 | !obj_desc->device.gpe_block) { | |
362 | return (NULL); | |
363 | } | |
364 | ||
365 | gpe_block = obj_desc->device.gpe_block; | |
366 | ||
367 | if ((gpe_number >= gpe_block->block_base_number) && | |
368 | (gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
369 | return (&gpe_block->event_info[gpe_number - gpe_block->block_base_number]); | |
370 | } | |
371 | ||
372 | return (NULL); | |
373 | } | |
374 | ||
375 | ||
376 | /******************************************************************************* | |
377 | * | |
378 | * FUNCTION: acpi_ev_gpe_detect | |
379 | * | |
380 | * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. | |
381 | * Can have multiple GPE blocks attached. | |
382 | * | |
383 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
384 | * | |
385 | * DESCRIPTION: Detect if any GP events have occurred. This function is | |
386 | * executed at interrupt level. | |
387 | * | |
388 | ******************************************************************************/ | |
389 | ||
390 | u32 | |
391 | acpi_ev_gpe_detect ( | |
392 | struct acpi_gpe_xrupt_info *gpe_xrupt_list) | |
393 | { | |
394 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; | |
395 | u8 enabled_status_byte; | |
396 | struct acpi_gpe_register_info *gpe_register_info; | |
397 | u32 status_reg; | |
398 | u32 enable_reg; | |
399 | acpi_status status; | |
400 | struct acpi_gpe_block_info *gpe_block; | |
401 | acpi_native_uint i; | |
402 | acpi_native_uint j; | |
403 | ||
404 | ||
405 | ACPI_FUNCTION_NAME ("ev_gpe_detect"); | |
406 | ||
407 | /* Check for the case where there are no GPEs */ | |
408 | ||
409 | if (!gpe_xrupt_list) { | |
410 | return (int_status); | |
411 | } | |
412 | ||
413 | /* Examine all GPE blocks attached to this interrupt level */ | |
414 | ||
415 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_ISR); | |
416 | gpe_block = gpe_xrupt_list->gpe_block_list_head; | |
417 | while (gpe_block) { | |
418 | /* | |
419 | * Read all of the 8-bit GPE status and enable registers | |
420 | * in this GPE block, saving all of them. | |
421 | * Find all currently active GP events. | |
422 | */ | |
423 | for (i = 0; i < gpe_block->register_count; i++) { | |
424 | /* Get the next status/enable pair */ | |
425 | ||
426 | gpe_register_info = &gpe_block->register_info[i]; | |
427 | ||
428 | /* Read the Status Register */ | |
429 | ||
430 | status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &status_reg, | |
431 | &gpe_register_info->status_address); | |
432 | if (ACPI_FAILURE (status)) { | |
433 | goto unlock_and_exit; | |
434 | } | |
435 | ||
436 | /* Read the Enable Register */ | |
437 | ||
438 | status = acpi_hw_low_level_read (ACPI_GPE_REGISTER_WIDTH, &enable_reg, | |
439 | &gpe_register_info->enable_address); | |
440 | if (ACPI_FAILURE (status)) { | |
441 | goto unlock_and_exit; | |
442 | } | |
443 | ||
444 | ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, | |
445 | "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", | |
446 | gpe_register_info->base_gpe_number, status_reg, enable_reg)); | |
447 | ||
44f6c012 | 448 | /* Check if there is anything active at all in this register */ |
1da177e4 LT |
449 | |
450 | enabled_status_byte = (u8) (status_reg & enable_reg); | |
451 | if (!enabled_status_byte) { | |
452 | /* No active GPEs in this register, move on */ | |
453 | ||
454 | continue; | |
455 | } | |
456 | ||
457 | /* Now look at the individual GPEs in this byte register */ | |
458 | ||
459 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
460 | /* Examine one GPE bit */ | |
461 | ||
462 | if (enabled_status_byte & acpi_gbl_decode_to8bit[j]) { | |
463 | /* | |
464 | * Found an active GPE. Dispatch the event to a handler | |
465 | * or method. | |
466 | */ | |
467 | int_status |= acpi_ev_gpe_dispatch ( | |
44f6c012 RM |
468 | &gpe_block->event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j], |
469 | (u32) j + gpe_register_info->base_gpe_number); | |
1da177e4 LT |
470 | } |
471 | } | |
472 | } | |
473 | ||
474 | gpe_block = gpe_block->next; | |
475 | } | |
476 | ||
477 | unlock_and_exit: | |
478 | ||
479 | acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_ISR); | |
480 | return (int_status); | |
481 | } | |
482 | ||
483 | ||
484 | /******************************************************************************* | |
485 | * | |
486 | * FUNCTION: acpi_ev_asynch_execute_gpe_method | |
487 | * | |
488 | * PARAMETERS: Context (gpe_event_info) - Info for this GPE | |
489 | * | |
490 | * RETURN: None | |
491 | * | |
492 | * DESCRIPTION: Perform the actual execution of a GPE control method. This | |
493 | * function is called from an invocation of acpi_os_queue_for_execution | |
494 | * (and therefore does NOT execute at interrupt level) so that | |
495 | * the control method itself is not executed in the context of | |
496 | * an interrupt handler. | |
497 | * | |
498 | ******************************************************************************/ | |
499 | ||
500 | static void ACPI_SYSTEM_XFACE | |
501 | acpi_ev_asynch_execute_gpe_method ( | |
502 | void *context) | |
503 | { | |
504 | struct acpi_gpe_event_info *gpe_event_info = (void *) context; | |
505 | u32 gpe_number = 0; | |
506 | acpi_status status; | |
507 | struct acpi_gpe_event_info local_gpe_event_info; | |
508 | struct acpi_parameter_info info; | |
509 | ||
510 | ||
511 | ACPI_FUNCTION_TRACE ("ev_asynch_execute_gpe_method"); | |
512 | ||
513 | ||
514 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); | |
515 | if (ACPI_FAILURE (status)) { | |
516 | return_VOID; | |
517 | } | |
518 | ||
519 | /* Must revalidate the gpe_number/gpe_block */ | |
520 | ||
521 | if (!acpi_ev_valid_gpe_event (gpe_event_info)) { | |
522 | status = acpi_ut_release_mutex (ACPI_MTX_EVENTS); | |
523 | return_VOID; | |
524 | } | |
525 | ||
526 | /* Set the GPE flags for return to enabled state */ | |
527 | ||
528 | (void) acpi_ev_enable_gpe (gpe_event_info, FALSE); | |
529 | ||
530 | /* | |
531 | * Take a snapshot of the GPE info for this level - we copy the | |
532 | * info to prevent a race condition with remove_handler/remove_block. | |
533 | */ | |
44f6c012 RM |
534 | ACPI_MEMCPY (&local_gpe_event_info, gpe_event_info, |
535 | sizeof (struct acpi_gpe_event_info)); | |
1da177e4 LT |
536 | |
537 | status = acpi_ut_release_mutex (ACPI_MTX_EVENTS); | |
538 | if (ACPI_FAILURE (status)) { | |
539 | return_VOID; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Must check for control method type dispatch one more | |
544 | * time to avoid race with ev_gpe_install_handler | |
545 | */ | |
44f6c012 RM |
546 | if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == |
547 | ACPI_GPE_DISPATCH_METHOD) { | |
1da177e4 LT |
548 | /* |
549 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx | |
550 | * control method that corresponds to this GPE | |
551 | */ | |
552 | info.node = local_gpe_event_info.dispatch.method_node; | |
553 | info.parameters = ACPI_CAST_PTR (union acpi_operand_object *, gpe_event_info); | |
554 | info.parameter_type = ACPI_PARAM_GPE; | |
555 | ||
556 | status = acpi_ns_evaluate_by_handle (&info); | |
557 | if (ACPI_FAILURE (status)) { | |
558 | ACPI_REPORT_ERROR (( | |
559 | "%s while evaluating method [%4.4s] for GPE[%2X]\n", | |
560 | acpi_format_exception (status), | |
561 | acpi_ut_get_node_name (local_gpe_event_info.dispatch.method_node), | |
562 | gpe_number)); | |
563 | } | |
564 | } | |
565 | ||
44f6c012 RM |
566 | if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
567 | ACPI_GPE_LEVEL_TRIGGERED) { | |
1da177e4 LT |
568 | /* |
569 | * GPE is level-triggered, we clear the GPE status bit after | |
570 | * handling the event. | |
571 | */ | |
572 | status = acpi_hw_clear_gpe (&local_gpe_event_info); | |
573 | if (ACPI_FAILURE (status)) { | |
574 | return_VOID; | |
575 | } | |
576 | } | |
577 | ||
578 | /* Enable this GPE */ | |
579 | ||
580 | (void) acpi_hw_write_gpe_enable_reg (&local_gpe_event_info); | |
581 | return_VOID; | |
582 | } | |
583 | ||
584 | ||
585 | /******************************************************************************* | |
586 | * | |
587 | * FUNCTION: acpi_ev_gpe_dispatch | |
588 | * | |
44f6c012 | 589 | * PARAMETERS: gpe_event_info - Info for this GPE |
1da177e4 LT |
590 | * gpe_number - Number relative to the parent GPE block |
591 | * | |
592 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
593 | * | |
594 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) | |
595 | * or method (e.g. _Lxx/_Exx) handler. | |
596 | * | |
597 | * This function executes at interrupt level. | |
598 | * | |
599 | ******************************************************************************/ | |
600 | ||
601 | u32 | |
602 | acpi_ev_gpe_dispatch ( | |
603 | struct acpi_gpe_event_info *gpe_event_info, | |
604 | u32 gpe_number) | |
605 | { | |
606 | acpi_status status; | |
607 | ||
608 | ||
609 | ACPI_FUNCTION_TRACE ("ev_gpe_dispatch"); | |
610 | ||
611 | ||
612 | /* | |
613 | * If edge-triggered, clear the GPE status bit now. Note that | |
614 | * level-triggered events are cleared after the GPE is serviced. | |
615 | */ | |
44f6c012 RM |
616 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
617 | ACPI_GPE_EDGE_TRIGGERED) { | |
1da177e4 LT |
618 | status = acpi_hw_clear_gpe (gpe_event_info); |
619 | if (ACPI_FAILURE (status)) { | |
44f6c012 RM |
620 | ACPI_REPORT_ERROR (( |
621 | "acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n", | |
1da177e4 LT |
622 | acpi_format_exception (status), gpe_number)); |
623 | return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); | |
624 | } | |
625 | } | |
626 | ||
627 | /* Save current system state */ | |
628 | ||
629 | if (acpi_gbl_system_awake_and_running) { | |
630 | ACPI_SET_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING); | |
631 | } | |
632 | else { | |
633 | ACPI_CLEAR_BIT (gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING); | |
634 | } | |
635 | ||
636 | /* | |
637 | * Dispatch the GPE to either an installed handler, or the control | |
638 | * method associated with this GPE (_Lxx or _Exx). | |
639 | * If a handler exists, we invoke it and do not attempt to run the method. | |
640 | * If there is neither a handler nor a method, we disable the level to | |
641 | * prevent further events from coming in here. | |
642 | */ | |
643 | switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { | |
644 | case ACPI_GPE_DISPATCH_HANDLER: | |
645 | ||
646 | /* | |
647 | * Invoke the installed handler (at interrupt level) | |
648 | * Ignore return status for now. TBD: leave GPE disabled on error? | |
649 | */ | |
650 | (void) gpe_event_info->dispatch.handler->address ( | |
651 | gpe_event_info->dispatch.handler->context); | |
652 | ||
653 | /* It is now safe to clear level-triggered events. */ | |
654 | ||
44f6c012 RM |
655 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
656 | ACPI_GPE_LEVEL_TRIGGERED) { | |
1da177e4 LT |
657 | status = acpi_hw_clear_gpe (gpe_event_info); |
658 | if (ACPI_FAILURE (status)) { | |
659 | ACPI_REPORT_ERROR (( | |
660 | "acpi_ev_gpe_dispatch: %s, Unable to clear GPE[%2X]\n", | |
661 | acpi_format_exception (status), gpe_number)); | |
662 | return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); | |
663 | } | |
664 | } | |
665 | break; | |
666 | ||
667 | case ACPI_GPE_DISPATCH_METHOD: | |
668 | ||
669 | /* | |
670 | * Disable GPE, so it doesn't keep firing before the method has a | |
671 | * chance to run. | |
672 | */ | |
673 | status = acpi_ev_disable_gpe (gpe_event_info); | |
674 | if (ACPI_FAILURE (status)) { | |
675 | ACPI_REPORT_ERROR (( | |
676 | "acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n", | |
677 | acpi_format_exception (status), gpe_number)); | |
678 | return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); | |
679 | } | |
680 | ||
681 | /* | |
682 | * Execute the method associated with the GPE | |
683 | * NOTE: Level-triggered GPEs are cleared after the method completes. | |
684 | */ | |
685 | status = acpi_os_queue_for_execution (OSD_PRIORITY_GPE, | |
686 | acpi_ev_asynch_execute_gpe_method, gpe_event_info); | |
687 | if (ACPI_FAILURE (status)) { | |
688 | ACPI_REPORT_ERROR (( | |
689 | "acpi_ev_gpe_dispatch: %s, Unable to queue handler for GPE[%2X] - event disabled\n", | |
690 | acpi_format_exception (status), gpe_number)); | |
691 | } | |
692 | break; | |
693 | ||
694 | default: | |
695 | ||
696 | /* No handler or method to run! */ | |
697 | ||
698 | ACPI_REPORT_ERROR (( | |
699 | "acpi_ev_gpe_dispatch: No handler or method for GPE[%2X], disabling event\n", | |
700 | gpe_number)); | |
701 | ||
702 | /* | |
703 | * Disable the GPE. The GPE will remain disabled until the ACPI | |
704 | * Core Subsystem is restarted, or a handler is installed. | |
705 | */ | |
706 | status = acpi_ev_disable_gpe (gpe_event_info); | |
707 | if (ACPI_FAILURE (status)) { | |
708 | ACPI_REPORT_ERROR (( | |
709 | "acpi_ev_gpe_dispatch: %s, Unable to disable GPE[%2X]\n", | |
710 | acpi_format_exception (status), gpe_number)); | |
711 | return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); | |
712 | } | |
713 | break; | |
714 | } | |
715 | ||
716 | return_VALUE (ACPI_INTERRUPT_HANDLED); | |
717 | } | |
718 | ||
719 | ||
720 | #ifdef ACPI_GPE_NOTIFY_CHECK | |
1da177e4 LT |
721 | /******************************************************************************* |
722 | * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED | |
723 | * | |
724 | * FUNCTION: acpi_ev_check_for_wake_only_gpe | |
725 | * | |
726 | * PARAMETERS: gpe_event_info - info for this GPE | |
727 | * | |
728 | * RETURN: Status | |
729 | * | |
730 | * DESCRIPTION: Determine if a a GPE is "wake-only". | |
731 | * | |
732 | * Called from Notify() code in interpreter when a "device_wake" | |
733 | * Notify comes in. | |
734 | * | |
735 | ******************************************************************************/ | |
736 | ||
737 | acpi_status | |
738 | acpi_ev_check_for_wake_only_gpe ( | |
739 | struct acpi_gpe_event_info *gpe_event_info) | |
740 | { | |
741 | acpi_status status; | |
742 | ||
743 | ||
744 | ACPI_FUNCTION_TRACE ("ev_check_for_wake_only_gpe"); | |
745 | ||
746 | ||
747 | if ((gpe_event_info) && /* Only >0 for _Lxx/_Exx */ | |
748 | ((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ { | |
749 | /* This must be a wake-only GPE, disable it */ | |
750 | ||
751 | status = acpi_ev_disable_gpe (gpe_event_info); | |
752 | ||
753 | /* Set GPE to wake-only. Do not change wake disabled/enabled status */ | |
754 | ||
755 | acpi_ev_set_gpe_type (gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
756 | ||
757 | ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n", | |
758 | gpe_event_info)); | |
759 | ||
760 | /* This was a wake-only GPE */ | |
761 | ||
762 | return_ACPI_STATUS (AE_WAKE_ONLY_GPE); | |
763 | } | |
764 | ||
765 | return_ACPI_STATUS (AE_OK); | |
766 | } | |
767 | #endif | |
768 | ||
769 |