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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpe - General Purpose Event handling and dispatch | |
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 | ||
44 | #include <acpi/acpi.h> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evgpe") |
33620c54 | 51 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
44f6c012 | 52 | /* Local prototypes */ |
4be44fcd | 53 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); |
1da177e4 | 54 | |
5a284cd7 LM |
55 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context); |
56 | ||
1da177e4 LT |
57 | /******************************************************************************* |
58 | * | |
a44061aa | 59 | * FUNCTION: acpi_ev_update_gpe_enable_mask |
1da177e4 LT |
60 | * |
61 | * PARAMETERS: gpe_event_info - GPE to update | |
1da177e4 LT |
62 | * |
63 | * RETURN: Status | |
64 | * | |
a44061aa RW |
65 | * DESCRIPTION: Updates GPE register enable mask based upon whether there are |
66 | * runtime references to this GPE | |
1da177e4 LT |
67 | * |
68 | ******************************************************************************/ | |
69 | ||
70 | acpi_status | |
a44061aa | 71 | acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 72 | { |
4be44fcd | 73 | struct acpi_gpe_register_info *gpe_register_info; |
e4e9a735 | 74 | u32 register_bit; |
1da177e4 | 75 | |
a44061aa | 76 | ACPI_FUNCTION_TRACE(ev_update_gpe_enable_mask); |
1da177e4 LT |
77 | |
78 | gpe_register_info = gpe_event_info->register_info; | |
79 | if (!gpe_register_info) { | |
4be44fcd | 80 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 | 81 | } |
d4913dc6 | 82 | |
1d94e1e8 | 83 | register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
1da177e4 | 84 | |
a44061aa | 85 | /* Clear the run bit up front */ |
0f849d2c | 86 | |
9630bdd9 | 87 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); |
1da177e4 | 88 | |
a44061aa | 89 | /* Set the mask bit only if there are references to this GPE */ |
0f849d2c LM |
90 | |
91 | if (gpe_event_info->runtime_count) { | |
1f86e8c1 LZ |
92 | ACPI_SET_BIT(gpe_register_info->enable_for_run, |
93 | (u8)register_bit); | |
0f849d2c | 94 | } |
1da177e4 | 95 | |
1fad8738 | 96 | gpe_register_info->enable_mask = gpe_register_info->enable_for_run; |
4be44fcd | 97 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
98 | } |
99 | ||
3bd741bd RW |
100 | /******************************************************************************* |
101 | * | |
102 | * FUNCTION: acpi_ev_enable_gpe | |
103 | * | |
f19f1a7e | 104 | * PARAMETERS: gpe_event_info - GPE to enable |
3bd741bd RW |
105 | * |
106 | * RETURN: Status | |
107 | * | |
da503373 | 108 | * DESCRIPTION: Clear a GPE of stale events and enable it. |
3bd741bd RW |
109 | * |
110 | ******************************************************************************/ | |
f19f1a7e | 111 | |
1f86e8c1 | 112 | acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
3bd741bd RW |
113 | { |
114 | acpi_status status; | |
115 | ||
116 | ACPI_FUNCTION_TRACE(ev_enable_gpe); | |
117 | ||
3bd741bd | 118 | /* Clear the GPE (of stale events) */ |
f19f1a7e | 119 | |
3bd741bd RW |
120 | status = acpi_hw_clear_gpe(gpe_event_info); |
121 | if (ACPI_FAILURE(status)) { | |
122 | return_ACPI_STATUS(status); | |
123 | } | |
124 | ||
125 | /* Enable the requested GPE */ | |
3bd741bd | 126 | |
0ee0d349 | 127 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); |
3bd741bd RW |
128 | return_ACPI_STATUS(status); |
129 | } | |
130 | ||
28f4f8a9 RW |
131 | /******************************************************************************* |
132 | * | |
3a37898d | 133 | * FUNCTION: acpi_ev_add_gpe_reference |
28f4f8a9 | 134 | * |
da503373 | 135 | * PARAMETERS: gpe_event_info - Add a reference to this GPE |
28f4f8a9 RW |
136 | * |
137 | * RETURN: Status | |
138 | * | |
139 | * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is | |
140 | * hardware-enabled. | |
141 | * | |
142 | ******************************************************************************/ | |
143 | ||
1f86e8c1 LZ |
144 | acpi_status |
145 | acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info) | |
28f4f8a9 RW |
146 | { |
147 | acpi_status status = AE_OK; | |
148 | ||
3a37898d LM |
149 | ACPI_FUNCTION_TRACE(ev_add_gpe_reference); |
150 | ||
28f4f8a9 RW |
151 | if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) { |
152 | return_ACPI_STATUS(AE_LIMIT); | |
153 | } | |
154 | ||
155 | gpe_event_info->runtime_count++; | |
156 | if (gpe_event_info->runtime_count == 1) { | |
da503373 LM |
157 | |
158 | /* Enable on first reference */ | |
159 | ||
28f4f8a9 RW |
160 | status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
161 | if (ACPI_SUCCESS(status)) { | |
162 | status = acpi_ev_enable_gpe(gpe_event_info); | |
163 | } | |
164 | ||
165 | if (ACPI_FAILURE(status)) { | |
166 | gpe_event_info->runtime_count--; | |
167 | } | |
168 | } | |
169 | ||
170 | return_ACPI_STATUS(status); | |
171 | } | |
172 | ||
173 | /******************************************************************************* | |
174 | * | |
3a37898d | 175 | * FUNCTION: acpi_ev_remove_gpe_reference |
28f4f8a9 | 176 | * |
da503373 | 177 | * PARAMETERS: gpe_event_info - Remove a reference to this GPE |
28f4f8a9 RW |
178 | * |
179 | * RETURN: Status | |
180 | * | |
181 | * DESCRIPTION: Remove a reference to a GPE. When the last reference is | |
182 | * removed, the GPE is hardware-disabled. | |
183 | * | |
184 | ******************************************************************************/ | |
185 | ||
1f86e8c1 LZ |
186 | acpi_status |
187 | acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info) | |
28f4f8a9 RW |
188 | { |
189 | acpi_status status = AE_OK; | |
190 | ||
3a37898d LM |
191 | ACPI_FUNCTION_TRACE(ev_remove_gpe_reference); |
192 | ||
28f4f8a9 RW |
193 | if (!gpe_event_info->runtime_count) { |
194 | return_ACPI_STATUS(AE_LIMIT); | |
195 | } | |
196 | ||
197 | gpe_event_info->runtime_count--; | |
198 | if (!gpe_event_info->runtime_count) { | |
da503373 LM |
199 | |
200 | /* Disable on last reference */ | |
201 | ||
28f4f8a9 RW |
202 | status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
203 | if (ACPI_SUCCESS(status)) { | |
1f86e8c1 LZ |
204 | status = |
205 | acpi_hw_low_set_gpe(gpe_event_info, | |
0ee0d349 | 206 | ACPI_GPE_DISABLE); |
28f4f8a9 RW |
207 | } |
208 | ||
209 | if (ACPI_FAILURE(status)) { | |
210 | gpe_event_info->runtime_count++; | |
211 | } | |
212 | } | |
213 | ||
214 | return_ACPI_STATUS(status); | |
215 | } | |
216 | ||
0f849d2c LM |
217 | /******************************************************************************* |
218 | * | |
219 | * FUNCTION: acpi_ev_low_get_gpe_info | |
220 | * | |
221 | * PARAMETERS: gpe_number - Raw GPE number | |
222 | * gpe_block - A GPE info block | |
223 | * | |
224 | * RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number | |
225 | * is not within the specified GPE block) | |
226 | * | |
227 | * DESCRIPTION: Returns the event_info struct associated with this GPE. This is | |
228 | * the low-level implementation of ev_get_gpe_event_info. | |
229 | * | |
230 | ******************************************************************************/ | |
231 | ||
232 | struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number, | |
233 | struct acpi_gpe_block_info | |
234 | *gpe_block) | |
235 | { | |
236 | u32 gpe_index; | |
237 | ||
238 | /* | |
239 | * Validate that the gpe_number is within the specified gpe_block. | |
240 | * (Two steps) | |
241 | */ | |
242 | if (!gpe_block || (gpe_number < gpe_block->block_base_number)) { | |
243 | return (NULL); | |
244 | } | |
245 | ||
246 | gpe_index = gpe_number - gpe_block->block_base_number; | |
247 | if (gpe_index >= gpe_block->gpe_count) { | |
248 | return (NULL); | |
249 | } | |
250 | ||
251 | return (&gpe_block->event_info[gpe_index]); | |
252 | } | |
253 | ||
254 | ||
1da177e4 LT |
255 | /******************************************************************************* |
256 | * | |
257 | * FUNCTION: acpi_ev_get_gpe_event_info | |
258 | * | |
9f15fc66 | 259 | * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 |
1da177e4 LT |
260 | * gpe_number - Raw GPE number |
261 | * | |
262 | * RETURN: A GPE event_info struct. NULL if not a valid GPE | |
263 | * | |
264 | * DESCRIPTION: Returns the event_info struct associated with this GPE. | |
265 | * Validates the gpe_block and the gpe_number | |
266 | * | |
267 | * Should be called only when the GPE lists are semaphore locked | |
268 | * and not subject to change. | |
269 | * | |
270 | ******************************************************************************/ | |
271 | ||
4be44fcd LB |
272 | struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, |
273 | u32 gpe_number) | |
1da177e4 | 274 | { |
4be44fcd | 275 | union acpi_operand_object *obj_desc; |
0f849d2c | 276 | struct acpi_gpe_event_info *gpe_info; |
67a119f9 | 277 | u32 i; |
1da177e4 | 278 | |
4be44fcd | 279 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 280 | |
186c307f | 281 | /* A NULL gpe_device means use the FADT-defined GPE block(s) */ |
1da177e4 LT |
282 | |
283 | if (!gpe_device) { | |
52fc0b02 | 284 | |
1da177e4 LT |
285 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
286 | ||
287 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { | |
0f849d2c LM |
288 | gpe_info = acpi_ev_low_get_gpe_info(gpe_number, |
289 | acpi_gbl_gpe_fadt_blocks | |
290 | [i]); | |
291 | if (gpe_info) { | |
292 | return (gpe_info); | |
1da177e4 LT |
293 | } |
294 | } | |
295 | ||
296 | /* The gpe_number was not in the range of either FADT GPE block */ | |
297 | ||
298 | return (NULL); | |
299 | } | |
300 | ||
301 | /* A Non-NULL gpe_device means this is a GPE Block Device */ | |
302 | ||
1f86e8c1 LZ |
303 | obj_desc = |
304 | acpi_ns_get_attached_object((struct acpi_namespace_node *) | |
fd350943 | 305 | gpe_device); |
4be44fcd | 306 | if (!obj_desc || !obj_desc->device.gpe_block) { |
1da177e4 LT |
307 | return (NULL); |
308 | } | |
309 | ||
0f849d2c LM |
310 | return (acpi_ev_low_get_gpe_info |
311 | (gpe_number, obj_desc->device.gpe_block)); | |
1da177e4 LT |
312 | } |
313 | ||
1da177e4 LT |
314 | /******************************************************************************* |
315 | * | |
316 | * FUNCTION: acpi_ev_gpe_detect | |
317 | * | |
318 | * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. | |
319 | * Can have multiple GPE blocks attached. | |
320 | * | |
321 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
322 | * | |
9f15fc66 | 323 | * DESCRIPTION: Detect if any GP events have occurred. This function is |
1da177e4 LT |
324 | * executed at interrupt level. |
325 | * | |
326 | ******************************************************************************/ | |
327 | ||
f19f1a7e | 328 | u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list) |
1da177e4 | 329 | { |
0897831b BM |
330 | acpi_status status; |
331 | struct acpi_gpe_block_info *gpe_block; | |
779ba5a3 | 332 | struct acpi_namespace_node *gpe_device; |
0897831b | 333 | struct acpi_gpe_register_info *gpe_register_info; |
779ba5a3 LZ |
334 | struct acpi_gpe_event_info *gpe_event_info; |
335 | u32 gpe_number; | |
0d0988af | 336 | struct acpi_gpe_handler_info *gpe_handler_info; |
4be44fcd LB |
337 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
338 | u8 enabled_status_byte; | |
4be44fcd LB |
339 | u32 status_reg; |
340 | u32 enable_reg; | |
b8e4d893 | 341 | acpi_cpu_flags flags; |
67a119f9 BM |
342 | u32 i; |
343 | u32 j; | |
4be44fcd | 344 | |
b229cf92 | 345 | ACPI_FUNCTION_NAME(ev_gpe_detect); |
1da177e4 LT |
346 | |
347 | /* Check for the case where there are no GPEs */ | |
348 | ||
349 | if (!gpe_xrupt_list) { | |
350 | return (int_status); | |
351 | } | |
352 | ||
967440e3 BM |
353 | /* |
354 | * We need to obtain the GPE lock for both the data structs and registers | |
9f15fc66 BM |
355 | * Note: Not necessary to obtain the hardware lock, since the GPE |
356 | * registers are owned by the gpe_lock. | |
967440e3 | 357 | */ |
4be44fcd | 358 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
4c90ece2 BM |
359 | |
360 | /* Examine all GPE blocks attached to this interrupt level */ | |
361 | ||
1da177e4 LT |
362 | gpe_block = gpe_xrupt_list->gpe_block_list_head; |
363 | while (gpe_block) { | |
779ba5a3 LZ |
364 | gpe_device = gpe_block->node; |
365 | ||
1da177e4 | 366 | /* |
9f15fc66 BM |
367 | * Read all of the 8-bit GPE status and enable registers in this GPE |
368 | * block, saving all of them. Find all currently active GP events. | |
1da177e4 LT |
369 | */ |
370 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 371 | |
1da177e4 LT |
372 | /* Get the next status/enable pair */ |
373 | ||
374 | gpe_register_info = &gpe_block->register_info[i]; | |
375 | ||
6dfad339 LM |
376 | /* |
377 | * Optimization: If there are no GPEs enabled within this | |
378 | * register, we can safely ignore the entire register. | |
379 | */ | |
380 | if (!(gpe_register_info->enable_for_run | | |
381 | gpe_register_info->enable_for_wake)) { | |
e1154ebd | 382 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
7505da4c | 383 | "Ignore disabled registers for GPE %02X-%02X: " |
e1154ebd BM |
384 | "RunEnable=%02X, WakeEnable=%02X\n", |
385 | gpe_register_info-> | |
386 | base_gpe_number, | |
387 | gpe_register_info-> | |
388 | base_gpe_number + | |
389 | (ACPI_GPE_REGISTER_WIDTH - 1), | |
390 | gpe_register_info-> | |
391 | enable_for_run, | |
392 | gpe_register_info-> | |
393 | enable_for_wake)); | |
6dfad339 LM |
394 | continue; |
395 | } | |
396 | ||
1da177e4 LT |
397 | /* Read the Status Register */ |
398 | ||
4be44fcd | 399 | status = |
c6b5774c BM |
400 | acpi_hw_read(&status_reg, |
401 | &gpe_register_info->status_address); | |
4be44fcd | 402 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
403 | goto unlock_and_exit; |
404 | } | |
405 | ||
406 | /* Read the Enable Register */ | |
407 | ||
4be44fcd | 408 | status = |
c6b5774c BM |
409 | acpi_hw_read(&enable_reg, |
410 | &gpe_register_info->enable_address); | |
4be44fcd | 411 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
412 | goto unlock_and_exit; |
413 | } | |
414 | ||
4be44fcd | 415 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
7505da4c | 416 | "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, " |
e1154ebd | 417 | "RunEnable=%02X, WakeEnable=%02X\n", |
4be44fcd | 418 | gpe_register_info->base_gpe_number, |
e1154ebd BM |
419 | gpe_register_info->base_gpe_number + |
420 | (ACPI_GPE_REGISTER_WIDTH - 1), | |
421 | status_reg, enable_reg, | |
422 | gpe_register_info->enable_for_run, | |
423 | gpe_register_info->enable_for_wake)); | |
1da177e4 | 424 | |
44f6c012 | 425 | /* Check if there is anything active at all in this register */ |
1da177e4 | 426 | |
f19f1a7e | 427 | enabled_status_byte = (u8)(status_reg & enable_reg); |
1da177e4 | 428 | if (!enabled_status_byte) { |
52fc0b02 | 429 | |
1da177e4 LT |
430 | /* No active GPEs in this register, move on */ |
431 | ||
432 | continue; | |
433 | } | |
434 | ||
435 | /* Now look at the individual GPEs in this byte register */ | |
436 | ||
437 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
52fc0b02 | 438 | |
1da177e4 LT |
439 | /* Examine one GPE bit */ |
440 | ||
779ba5a3 LZ |
441 | gpe_event_info = |
442 | &gpe_block-> | |
f5c1e1c5 | 443 | event_info[((acpi_size)i * |
779ba5a3 LZ |
444 | ACPI_GPE_REGISTER_WIDTH) + j]; |
445 | gpe_number = | |
446 | j + gpe_register_info->base_gpe_number; | |
447 | ||
69874165 | 448 | if (enabled_status_byte & (1 << j)) { |
779ba5a3 LZ |
449 | |
450 | /* Invoke global event handler if present */ | |
451 | ||
452 | acpi_gpe_count++; | |
453 | if (acpi_gbl_global_event_handler) { | |
454 | acpi_gbl_global_event_handler | |
455 | (ACPI_EVENT_TYPE_GPE, | |
456 | gpe_device, gpe_number, | |
457 | acpi_gbl_global_event_handler_context); | |
458 | } | |
459 | ||
0d0988af LZ |
460 | /* Found an active GPE */ |
461 | ||
462 | if (ACPI_GPE_DISPATCH_TYPE | |
463 | (gpe_event_info->flags) == | |
464 | ACPI_GPE_DISPATCH_RAW_HANDLER) { | |
465 | ||
466 | /* Dispatch the event to a raw handler */ | |
467 | ||
468 | gpe_handler_info = | |
469 | gpe_event_info->dispatch. | |
470 | handler; | |
471 | ||
472 | /* | |
473 | * There is no protection around the namespace node | |
474 | * and the GPE handler to ensure a safe destruction | |
475 | * because: | |
476 | * 1. The namespace node is expected to always | |
477 | * exist after loading a table. | |
478 | * 2. The GPE handler is expected to be flushed by | |
479 | * acpi_os_wait_events_complete() before the | |
480 | * destruction. | |
481 | */ | |
482 | acpi_os_release_lock | |
483 | (acpi_gbl_gpe_lock, flags); | |
484 | int_status |= | |
485 | gpe_handler_info-> | |
486 | address(gpe_device, | |
487 | gpe_number, | |
488 | gpe_handler_info-> | |
489 | context); | |
490 | flags = | |
491 | acpi_os_acquire_lock | |
492 | (acpi_gbl_gpe_lock); | |
493 | } else { | |
494 | /* | |
495 | * Dispatch the event to a standard handler or | |
496 | * method. | |
497 | */ | |
498 | int_status |= | |
499 | acpi_ev_gpe_dispatch | |
500 | (gpe_device, gpe_event_info, | |
501 | gpe_number); | |
502 | } | |
1da177e4 LT |
503 | } |
504 | } | |
505 | } | |
506 | ||
507 | gpe_block = gpe_block->next; | |
508 | } | |
509 | ||
10622bf8 | 510 | unlock_and_exit: |
1da177e4 | 511 | |
4be44fcd | 512 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
513 | return (int_status); |
514 | } | |
515 | ||
1da177e4 LT |
516 | /******************************************************************************* |
517 | * | |
518 | * FUNCTION: acpi_ev_asynch_execute_gpe_method | |
519 | * | |
520 | * PARAMETERS: Context (gpe_event_info) - Info for this GPE | |
521 | * | |
522 | * RETURN: None | |
523 | * | |
4119532c BM |
524 | * DESCRIPTION: Perform the actual execution of a GPE control method. This |
525 | * function is called from an invocation of acpi_os_execute and | |
526 | * therefore does NOT execute at interrupt level - so that | |
1da177e4 LT |
527 | * the control method itself is not executed in the context of |
528 | * an interrupt handler. | |
529 | * | |
530 | ******************************************************************************/ | |
531 | ||
4be44fcd | 532 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) |
1da177e4 | 533 | { |
5a284cd7 | 534 | struct acpi_gpe_event_info *gpe_event_info = context; |
b7be6883 | 535 | acpi_status status = AE_OK; |
4119532c | 536 | struct acpi_evaluate_info *info; |
5816b343 | 537 | struct acpi_gpe_notify_info *notify; |
1da177e4 | 538 | |
b229cf92 | 539 | ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); |
1da177e4 | 540 | |
bba63a29 LM |
541 | /* Do the correct dispatch - normal method or implicit notify */ |
542 | ||
7c43312a | 543 | switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { |
bba63a29 | 544 | case ACPI_GPE_DISPATCH_NOTIFY: |
bba63a29 LM |
545 | /* |
546 | * Implicit notify. | |
547 | * Dispatch a DEVICE_WAKE notify to the appropriate handler. | |
548 | * NOTE: the request is queued for execution after this method | |
549 | * completes. The notify handlers are NOT invoked synchronously | |
550 | * from this thread -- because handlers may in turn run other | |
551 | * control methods. | |
5816b343 BM |
552 | * |
553 | * June 2012: Expand implicit notify mechanism to support | |
554 | * notifies on multiple device objects. | |
bba63a29 | 555 | */ |
b18da580 | 556 | notify = gpe_event_info->dispatch.notify_list; |
5816b343 BM |
557 | while (ACPI_SUCCESS(status) && notify) { |
558 | status = | |
559 | acpi_ev_queue_notify_request(notify->device_node, | |
560 | ACPI_NOTIFY_DEVICE_WAKE); | |
561 | ||
562 | notify = notify->next; | |
981858bd RW |
563 | } |
564 | ||
bba63a29 LM |
565 | break; |
566 | ||
567 | case ACPI_GPE_DISPATCH_METHOD: | |
1da177e4 | 568 | |
4119532c BM |
569 | /* Allocate the evaluation information block */ |
570 | ||
571 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
572 | if (!info) { | |
573 | status = AE_NO_MEMORY; | |
574 | } else { | |
575 | /* | |
75c8044f LZ |
576 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the |
577 | * _Lxx/_Exx control method that corresponds to this GPE | |
4119532c BM |
578 | */ |
579 | info->prefix_node = | |
b18da580 | 580 | gpe_event_info->dispatch.method_node; |
4119532c BM |
581 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
582 | ||
583 | status = acpi_ns_evaluate(info); | |
584 | ACPI_FREE(info); | |
585 | } | |
586 | ||
4be44fcd | 587 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 588 | ACPI_EXCEPTION((AE_INFO, status, |
2e42005b | 589 | "while evaluating GPE method [%4.4s]", |
b18da580 LZ |
590 | acpi_ut_get_node_name(gpe_event_info-> |
591 | dispatch. | |
592 | method_node))); | |
1da177e4 | 593 | } |
bba63a29 LM |
594 | break; |
595 | ||
596 | default: | |
1d1ea1b7 | 597 | |
b18da580 | 598 | goto error_exit; /* Should never happen */ |
1da177e4 | 599 | } |
5a284cd7 | 600 | |
17bc54ee | 601 | /* Defer enabling of GPE until all notify handlers are done */ |
5a284cd7 LM |
602 | |
603 | status = acpi_os_execute(OSL_NOTIFY_HANDLER, | |
b18da580 LZ |
604 | acpi_ev_asynch_enable_gpe, gpe_event_info); |
605 | if (ACPI_SUCCESS(status)) { | |
606 | return_VOID; | |
5a284cd7 | 607 | } |
b18da580 LZ |
608 | |
609 | error_exit: | |
610 | acpi_ev_asynch_enable_gpe(gpe_event_info); | |
17bc54ee AS |
611 | return_VOID; |
612 | } | |
1da177e4 | 613 | |
bba63a29 | 614 | |
5a284cd7 LM |
615 | /******************************************************************************* |
616 | * | |
617 | * FUNCTION: acpi_ev_asynch_enable_gpe | |
618 | * | |
619 | * PARAMETERS: Context (gpe_event_info) - Info for this GPE | |
620 | * Callback from acpi_os_execute | |
621 | * | |
622 | * RETURN: None | |
623 | * | |
624 | * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to | |
bba63a29 | 625 | * complete (i.e., finish execution of Notify) |
5a284cd7 LM |
626 | * |
627 | ******************************************************************************/ | |
628 | ||
629 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context) | |
17bc54ee AS |
630 | { |
631 | struct acpi_gpe_event_info *gpe_event_info = context; | |
7dd88219 | 632 | acpi_cpu_flags flags; |
bba63a29 | 633 | |
7dd88219 | 634 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
bba63a29 | 635 | (void)acpi_ev_finish_gpe(gpe_event_info); |
7dd88219 | 636 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
bba63a29 | 637 | |
bba63a29 LM |
638 | return; |
639 | } | |
640 | ||
641 | ||
642 | /******************************************************************************* | |
643 | * | |
644 | * FUNCTION: acpi_ev_finish_gpe | |
645 | * | |
646 | * PARAMETERS: gpe_event_info - Info for this GPE | |
647 | * | |
648 | * RETURN: Status | |
649 | * | |
650 | * DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution | |
651 | * of a GPE method or a synchronous or asynchronous GPE handler. | |
652 | * | |
653 | ******************************************************************************/ | |
654 | ||
f5c1e1c5 | 655 | acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info) |
bba63a29 | 656 | { |
17bc54ee | 657 | acpi_status status; |
5a284cd7 | 658 | |
17bc54ee | 659 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd | 660 | ACPI_GPE_LEVEL_TRIGGERED) { |
1da177e4 | 661 | /* |
bba63a29 LM |
662 | * GPE is level-triggered, we clear the GPE status bit after |
663 | * handling the event. | |
1da177e4 | 664 | */ |
17bc54ee | 665 | status = acpi_hw_clear_gpe(gpe_event_info); |
4be44fcd | 666 | if (ACPI_FAILURE(status)) { |
bba63a29 | 667 | return (status); |
1da177e4 LT |
668 | } |
669 | } | |
670 | ||
de5668fe | 671 | /* |
bba63a29 | 672 | * Enable this GPE, conditionally. This means that the GPE will |
c50f13c6 | 673 | * only be physically enabled if the enable_mask bit is set |
bba63a29 | 674 | * in the event_info. |
de5668fe | 675 | */ |
3a37898d | 676 | (void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE); |
bba63a29 | 677 | return (AE_OK); |
1da177e4 LT |
678 | } |
679 | ||
bba63a29 | 680 | |
1da177e4 LT |
681 | /******************************************************************************* |
682 | * | |
683 | * FUNCTION: acpi_ev_gpe_dispatch | |
684 | * | |
f19f1a7e LZ |
685 | * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 |
686 | * gpe_event_info - Info for this GPE | |
687 | * gpe_number - Number relative to the parent GPE block | |
1da177e4 LT |
688 | * |
689 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
690 | * | |
691 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) | |
692 | * or method (e.g. _Lxx/_Exx) handler. | |
693 | * | |
694 | * This function executes at interrupt level. | |
695 | * | |
696 | ******************************************************************************/ | |
697 | ||
698 | u32 | |
8b6cd8ad | 699 | acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device, |
f19f1a7e | 700 | struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
1da177e4 | 701 | { |
4be44fcd | 702 | acpi_status status; |
bba63a29 | 703 | u32 return_value; |
1da177e4 | 704 | |
b229cf92 | 705 | ACPI_FUNCTION_TRACE(ev_gpe_dispatch); |
1da177e4 | 706 | |
1da177e4 | 707 | /* |
bba63a29 LM |
708 | * Always disable the GPE so that it does not keep firing before |
709 | * any asynchronous activity completes (either from the execution | |
710 | * of a GPE method or an asynchronous GPE handler.) | |
711 | * | |
712 | * If there is no handler or method to run, just disable the | |
713 | * GPE and leave it disabled permanently to prevent further such | |
714 | * pointless events from firing. | |
715 | */ | |
716 | status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); | |
717 | if (ACPI_FAILURE(status)) { | |
718 | ACPI_EXCEPTION((AE_INFO, status, | |
7505da4c | 719 | "Unable to disable GPE %02X", gpe_number)); |
fd1af712 | 720 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
bba63a29 LM |
721 | } |
722 | ||
6ec5e120 LZ |
723 | /* |
724 | * If edge-triggered, clear the GPE status bit now. Note that | |
725 | * level-triggered events are cleared after the GPE is serviced. | |
726 | */ | |
727 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == | |
728 | ACPI_GPE_EDGE_TRIGGERED) { | |
729 | status = acpi_hw_clear_gpe(gpe_event_info); | |
730 | if (ACPI_FAILURE(status)) { | |
731 | ACPI_EXCEPTION((AE_INFO, status, | |
732 | "Unable to clear GPE %02X", | |
733 | gpe_number)); | |
734 | (void)acpi_hw_low_set_gpe(gpe_event_info, | |
735 | ACPI_GPE_CONDITIONAL_ENABLE); | |
736 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); | |
737 | } | |
738 | } | |
739 | ||
bba63a29 LM |
740 | /* |
741 | * Dispatch the GPE to either an installed handler or the control | |
742 | * method associated with this GPE (_Lxx or _Exx). If a handler | |
743 | * exists, we invoke it and do not attempt to run the method. | |
744 | * If there is neither a handler nor a method, leave the GPE | |
745 | * disabled. | |
1da177e4 | 746 | */ |
7c43312a | 747 | switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { |
1da177e4 LT |
748 | case ACPI_GPE_DISPATCH_HANDLER: |
749 | ||
bba63a29 LM |
750 | /* Invoke the installed handler (at interrupt level) */ |
751 | ||
752 | return_value = | |
753 | gpe_event_info->dispatch.handler->address(gpe_device, | |
754 | gpe_number, | |
755 | gpe_event_info-> | |
756 | dispatch.handler-> | |
757 | context); | |
758 | ||
759 | /* If requested, clear (if level-triggered) and reenable the GPE */ | |
760 | ||
761 | if (return_value & ACPI_REENABLE_GPE) { | |
762 | (void)acpi_ev_finish_gpe(gpe_event_info); | |
1da177e4 LT |
763 | } |
764 | break; | |
765 | ||
766 | case ACPI_GPE_DISPATCH_METHOD: | |
bba63a29 | 767 | case ACPI_GPE_DISPATCH_NOTIFY: |
1da177e4 LT |
768 | /* |
769 | * Execute the method associated with the GPE | |
770 | * NOTE: Level-triggered GPEs are cleared after the method completes. | |
771 | */ | |
958dd242 BM |
772 | status = acpi_os_execute(OSL_GPE_HANDLER, |
773 | acpi_ev_asynch_execute_gpe_method, | |
774 | gpe_event_info); | |
4be44fcd | 775 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 776 | ACPI_EXCEPTION((AE_INFO, status, |
7505da4c | 777 | "Unable to queue handler for GPE %02X - event disabled", |
b8e4d893 | 778 | gpe_number)); |
1da177e4 LT |
779 | } |
780 | break; | |
781 | ||
782 | default: | |
0f849d2c LM |
783 | /* |
784 | * No handler or method to run! | |
785 | * 03/2010: This case should no longer be possible. We will not allow | |
786 | * a GPE to be enabled if it has no handler or method. | |
787 | */ | |
b8e4d893 | 788 | ACPI_ERROR((AE_INFO, |
7505da4c | 789 | "No handler or method for GPE %02X, disabling event", |
b8e4d893 | 790 | gpe_number)); |
1da177e4 | 791 | |
1da177e4 LT |
792 | break; |
793 | } | |
794 | ||
fd1af712 | 795 | return_UINT32(ACPI_INTERRUPT_HANDLED); |
1da177e4 | 796 | } |
33620c54 BM |
797 | |
798 | #endif /* !ACPI_REDUCED_HARDWARE */ |