Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpe - General Purpose Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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> | |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | ||
48 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 49 | ACPI_MODULE_NAME("evgpe") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
4be44fcd | 52 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); |
1da177e4 LT |
53 | |
54 | /******************************************************************************* | |
55 | * | |
56 | * FUNCTION: acpi_ev_set_gpe_type | |
57 | * | |
58 | * PARAMETERS: gpe_event_info - GPE to set | |
59 | * Type - New type | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
63 | * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
67 | acpi_status | |
4be44fcd | 68 | acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type) |
1da177e4 | 69 | { |
4be44fcd | 70 | acpi_status status; |
1da177e4 | 71 | |
b229cf92 | 72 | ACPI_FUNCTION_TRACE(ev_set_gpe_type); |
1da177e4 LT |
73 | |
74 | /* Validate type and update register enable masks */ | |
75 | ||
76 | switch (type) { | |
77 | case ACPI_GPE_TYPE_WAKE: | |
78 | case ACPI_GPE_TYPE_RUNTIME: | |
79 | case ACPI_GPE_TYPE_WAKE_RUN: | |
80 | break; | |
81 | ||
82 | default: | |
4be44fcd | 83 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
84 | } |
85 | ||
86 | /* Disable the GPE if currently enabled */ | |
87 | ||
4be44fcd | 88 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 LT |
89 | |
90 | /* Type was validated above */ | |
91 | ||
4be44fcd LB |
92 | gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ |
93 | gpe_event_info->flags |= type; /* Insert type */ | |
94 | return_ACPI_STATUS(status); | |
1da177e4 LT |
95 | } |
96 | ||
1da177e4 LT |
97 | /******************************************************************************* |
98 | * | |
99 | * FUNCTION: acpi_ev_update_gpe_enable_masks | |
100 | * | |
101 | * PARAMETERS: gpe_event_info - GPE to update | |
102 | * Type - What to do: ACPI_GPE_DISABLE or | |
103 | * ACPI_GPE_ENABLE | |
104 | * | |
105 | * RETURN: Status | |
106 | * | |
107 | * DESCRIPTION: Updates GPE register enable masks based on the GPE type | |
108 | * | |
109 | ******************************************************************************/ | |
110 | ||
111 | acpi_status | |
4be44fcd LB |
112 | acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info, |
113 | u8 type) | |
1da177e4 | 114 | { |
4be44fcd LB |
115 | struct acpi_gpe_register_info *gpe_register_info; |
116 | u8 register_bit; | |
1da177e4 | 117 | |
b229cf92 | 118 | ACPI_FUNCTION_TRACE(ev_update_gpe_enable_masks); |
1da177e4 LT |
119 | |
120 | gpe_register_info = gpe_event_info->register_info; | |
121 | if (!gpe_register_info) { | |
4be44fcd | 122 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
123 | } |
124 | register_bit = gpe_event_info->register_bit; | |
125 | ||
126 | /* 1) Disable case. Simply clear all enable bits */ | |
127 | ||
128 | if (type == ACPI_GPE_DISABLE) { | |
4be44fcd LB |
129 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
130 | register_bit); | |
131 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); | |
132 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
133 | } |
134 | ||
135 | /* 2) Enable case. Set/Clear the appropriate enable bits */ | |
136 | ||
137 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
138 | case ACPI_GPE_TYPE_WAKE: | |
4be44fcd LB |
139 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
140 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
141 | break; |
142 | ||
143 | case ACPI_GPE_TYPE_RUNTIME: | |
4be44fcd LB |
144 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
145 | register_bit); | |
146 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
147 | break; |
148 | ||
149 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd LB |
150 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
151 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
152 | break; |
153 | ||
154 | default: | |
4be44fcd | 155 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
156 | } |
157 | ||
4be44fcd | 158 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
159 | } |
160 | ||
1da177e4 LT |
161 | /******************************************************************************* |
162 | * | |
163 | * FUNCTION: acpi_ev_enable_gpe | |
164 | * | |
165 | * PARAMETERS: gpe_event_info - GPE to enable | |
166 | * write_to_hardware - Enable now, or just mark data structs | |
167 | * (WAKE GPEs should be deferred) | |
168 | * | |
169 | * RETURN: Status | |
170 | * | |
171 | * DESCRIPTION: Enable a GPE based on the GPE type | |
172 | * | |
173 | ******************************************************************************/ | |
174 | ||
175 | acpi_status | |
4be44fcd LB |
176 | acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info, |
177 | u8 write_to_hardware) | |
1da177e4 | 178 | { |
4be44fcd | 179 | acpi_status status; |
1da177e4 | 180 | |
b229cf92 | 181 | ACPI_FUNCTION_TRACE(ev_enable_gpe); |
1da177e4 LT |
182 | |
183 | /* Make sure HW enable masks are updated */ | |
184 | ||
4be44fcd LB |
185 | status = |
186 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE); | |
187 | if (ACPI_FAILURE(status)) { | |
188 | return_ACPI_STATUS(status); | |
1da177e4 LT |
189 | } |
190 | ||
191 | /* Mark wake-enabled or HW enable, or both */ | |
192 | ||
193 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
194 | case ACPI_GPE_TYPE_WAKE: | |
195 | ||
4be44fcd | 196 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
197 | break; |
198 | ||
199 | case ACPI_GPE_TYPE_WAKE_RUN: | |
200 | ||
4be44fcd | 201 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
202 | |
203 | /*lint -fallthrough */ | |
204 | ||
205 | case ACPI_GPE_TYPE_RUNTIME: | |
206 | ||
4be44fcd | 207 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
1da177e4 LT |
208 | |
209 | if (write_to_hardware) { | |
52fc0b02 | 210 | |
1da177e4 LT |
211 | /* Clear the GPE (of stale events), then enable it */ |
212 | ||
4be44fcd LB |
213 | status = acpi_hw_clear_gpe(gpe_event_info); |
214 | if (ACPI_FAILURE(status)) { | |
215 | return_ACPI_STATUS(status); | |
1da177e4 LT |
216 | } |
217 | ||
218 | /* Enable the requested runtime GPE */ | |
219 | ||
4be44fcd | 220 | status = acpi_hw_write_gpe_enable_reg(gpe_event_info); |
1da177e4 LT |
221 | } |
222 | break; | |
223 | ||
224 | default: | |
4be44fcd | 225 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
226 | } |
227 | ||
4be44fcd | 228 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
229 | } |
230 | ||
1da177e4 LT |
231 | /******************************************************************************* |
232 | * | |
233 | * FUNCTION: acpi_ev_disable_gpe | |
234 | * | |
235 | * PARAMETERS: gpe_event_info - GPE to disable | |
236 | * | |
237 | * RETURN: Status | |
238 | * | |
239 | * DESCRIPTION: Disable a GPE based on the GPE type | |
240 | * | |
241 | ******************************************************************************/ | |
242 | ||
4be44fcd | 243 | acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 244 | { |
4be44fcd | 245 | acpi_status status; |
1da177e4 | 246 | |
b229cf92 | 247 | ACPI_FUNCTION_TRACE(ev_disable_gpe); |
1da177e4 LT |
248 | |
249 | if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) { | |
4be44fcd | 250 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Make sure HW enable masks are updated */ | |
254 | ||
4be44fcd LB |
255 | status = |
256 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE); | |
257 | if (ACPI_FAILURE(status)) { | |
258 | return_ACPI_STATUS(status); | |
1da177e4 LT |
259 | } |
260 | ||
261 | /* Mark wake-disabled or HW disable, or both */ | |
262 | ||
263 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
264 | case ACPI_GPE_TYPE_WAKE: | |
4be44fcd | 265 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
266 | break; |
267 | ||
268 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd | 269 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
270 | |
271 | /*lint -fallthrough */ | |
272 | ||
273 | case ACPI_GPE_TYPE_RUNTIME: | |
274 | ||
275 | /* Disable the requested runtime GPE */ | |
276 | ||
4be44fcd LB |
277 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
278 | status = acpi_hw_write_gpe_enable_reg(gpe_event_info); | |
1da177e4 LT |
279 | break; |
280 | ||
281 | default: | |
4be44fcd | 282 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
283 | } |
284 | ||
4be44fcd | 285 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
286 | } |
287 | ||
1da177e4 LT |
288 | /******************************************************************************* |
289 | * | |
290 | * FUNCTION: acpi_ev_get_gpe_event_info | |
291 | * | |
292 | * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 | |
293 | * gpe_number - Raw GPE number | |
294 | * | |
295 | * RETURN: A GPE event_info struct. NULL if not a valid GPE | |
296 | * | |
297 | * DESCRIPTION: Returns the event_info struct associated with this GPE. | |
298 | * Validates the gpe_block and the gpe_number | |
299 | * | |
300 | * Should be called only when the GPE lists are semaphore locked | |
301 | * and not subject to change. | |
302 | * | |
303 | ******************************************************************************/ | |
304 | ||
4be44fcd LB |
305 | struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, |
306 | u32 gpe_number) | |
1da177e4 | 307 | { |
4be44fcd LB |
308 | union acpi_operand_object *obj_desc; |
309 | struct acpi_gpe_block_info *gpe_block; | |
310 | acpi_native_uint i; | |
1da177e4 | 311 | |
4be44fcd | 312 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
313 | |
314 | /* A NULL gpe_block means use the FADT-defined GPE block(s) */ | |
315 | ||
316 | if (!gpe_device) { | |
52fc0b02 | 317 | |
1da177e4 LT |
318 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
319 | ||
320 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { | |
321 | gpe_block = acpi_gbl_gpe_fadt_blocks[i]; | |
322 | if (gpe_block) { | |
4be44fcd LB |
323 | if ((gpe_number >= gpe_block->block_base_number) |
324 | && (gpe_number < | |
325 | gpe_block->block_base_number + | |
326 | (gpe_block->register_count * 8))) { | |
327 | return (&gpe_block-> | |
328 | event_info[gpe_number - | |
329 | gpe_block-> | |
330 | block_base_number]); | |
1da177e4 LT |
331 | } |
332 | } | |
333 | } | |
334 | ||
335 | /* The gpe_number was not in the range of either FADT GPE block */ | |
336 | ||
337 | return (NULL); | |
338 | } | |
339 | ||
340 | /* A Non-NULL gpe_device means this is a GPE Block Device */ | |
341 | ||
4be44fcd LB |
342 | obj_desc = |
343 | acpi_ns_get_attached_object((struct acpi_namespace_node *) | |
344 | gpe_device); | |
345 | if (!obj_desc || !obj_desc->device.gpe_block) { | |
1da177e4 LT |
346 | return (NULL); |
347 | } | |
348 | ||
349 | gpe_block = obj_desc->device.gpe_block; | |
350 | ||
351 | if ((gpe_number >= gpe_block->block_base_number) && | |
4be44fcd LB |
352 | (gpe_number < |
353 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
354 | return (&gpe_block-> | |
355 | event_info[gpe_number - gpe_block->block_base_number]); | |
1da177e4 LT |
356 | } |
357 | ||
358 | return (NULL); | |
359 | } | |
360 | ||
1da177e4 LT |
361 | /******************************************************************************* |
362 | * | |
363 | * FUNCTION: acpi_ev_gpe_detect | |
364 | * | |
365 | * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. | |
366 | * Can have multiple GPE blocks attached. | |
367 | * | |
368 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
369 | * | |
370 | * DESCRIPTION: Detect if any GP events have occurred. This function is | |
371 | * executed at interrupt level. | |
372 | * | |
373 | ******************************************************************************/ | |
374 | ||
4be44fcd | 375 | u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list) |
1da177e4 | 376 | { |
0897831b BM |
377 | acpi_status status; |
378 | struct acpi_gpe_block_info *gpe_block; | |
379 | struct acpi_gpe_register_info *gpe_register_info; | |
4be44fcd LB |
380 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
381 | u8 enabled_status_byte; | |
4be44fcd LB |
382 | u32 status_reg; |
383 | u32 enable_reg; | |
b8e4d893 | 384 | acpi_cpu_flags flags; |
4be44fcd LB |
385 | acpi_native_uint i; |
386 | acpi_native_uint j; | |
387 | ||
b229cf92 | 388 | ACPI_FUNCTION_NAME(ev_gpe_detect); |
1da177e4 LT |
389 | |
390 | /* Check for the case where there are no GPEs */ | |
391 | ||
392 | if (!gpe_xrupt_list) { | |
393 | return (int_status); | |
394 | } | |
395 | ||
967440e3 BM |
396 | /* |
397 | * We need to obtain the GPE lock for both the data structs and registers | |
398 | * Note: Not necessary to obtain the hardware lock, since the GPE registers | |
399 | * are owned by the gpe_lock. | |
400 | */ | |
4be44fcd | 401 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
4c90ece2 BM |
402 | |
403 | /* Examine all GPE blocks attached to this interrupt level */ | |
404 | ||
1da177e4 LT |
405 | gpe_block = gpe_xrupt_list->gpe_block_list_head; |
406 | while (gpe_block) { | |
407 | /* | |
408 | * Read all of the 8-bit GPE status and enable registers | |
409 | * in this GPE block, saving all of them. | |
410 | * Find all currently active GP events. | |
411 | */ | |
412 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 413 | |
1da177e4 LT |
414 | /* Get the next status/enable pair */ |
415 | ||
416 | gpe_register_info = &gpe_block->register_info[i]; | |
417 | ||
418 | /* Read the Status Register */ | |
419 | ||
4be44fcd LB |
420 | status = |
421 | acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, | |
422 | &status_reg, | |
423 | &gpe_register_info-> | |
424 | status_address); | |
425 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
426 | goto unlock_and_exit; |
427 | } | |
428 | ||
429 | /* Read the Enable Register */ | |
430 | ||
4be44fcd LB |
431 | status = |
432 | acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, | |
433 | &enable_reg, | |
434 | &gpe_register_info-> | |
435 | enable_address); | |
436 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
437 | goto unlock_and_exit; |
438 | } | |
439 | ||
4be44fcd LB |
440 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
441 | "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", | |
442 | gpe_register_info->base_gpe_number, | |
443 | status_reg, enable_reg)); | |
1da177e4 | 444 | |
44f6c012 | 445 | /* Check if there is anything active at all in this register */ |
1da177e4 LT |
446 | |
447 | enabled_status_byte = (u8) (status_reg & enable_reg); | |
448 | if (!enabled_status_byte) { | |
52fc0b02 | 449 | |
1da177e4 LT |
450 | /* No active GPEs in this register, move on */ |
451 | ||
452 | continue; | |
453 | } | |
454 | ||
455 | /* Now look at the individual GPEs in this byte register */ | |
456 | ||
457 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
52fc0b02 | 458 | |
1da177e4 LT |
459 | /* Examine one GPE bit */ |
460 | ||
4be44fcd LB |
461 | if (enabled_status_byte & |
462 | acpi_gbl_decode_to8bit[j]) { | |
1da177e4 LT |
463 | /* |
464 | * Found an active GPE. Dispatch the event to a handler | |
465 | * or method. | |
466 | */ | |
4be44fcd LB |
467 | int_status |= |
468 | acpi_ev_gpe_dispatch(&gpe_block-> | |
469 | event_info[(i * | |
470 | ACPI_GPE_REGISTER_WIDTH) | |
471 | + | |
472 | j], | |
473 | (u32) j + | |
474 | gpe_register_info-> | |
475 | base_gpe_number); | |
1da177e4 LT |
476 | } |
477 | } | |
478 | } | |
479 | ||
480 | gpe_block = gpe_block->next; | |
481 | } | |
482 | ||
4be44fcd | 483 | unlock_and_exit: |
1da177e4 | 484 | |
4be44fcd | 485 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
486 | return (int_status); |
487 | } | |
488 | ||
1da177e4 LT |
489 | /******************************************************************************* |
490 | * | |
491 | * FUNCTION: acpi_ev_asynch_execute_gpe_method | |
492 | * | |
493 | * PARAMETERS: Context (gpe_event_info) - Info for this GPE | |
494 | * | |
495 | * RETURN: None | |
496 | * | |
4119532c BM |
497 | * DESCRIPTION: Perform the actual execution of a GPE control method. This |
498 | * function is called from an invocation of acpi_os_execute and | |
499 | * therefore does NOT execute at interrupt level - so that | |
1da177e4 LT |
500 | * the control method itself is not executed in the context of |
501 | * an interrupt handler. | |
502 | * | |
503 | ******************************************************************************/ | |
504 | ||
4be44fcd | 505 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) |
1da177e4 | 506 | { |
4be44fcd | 507 | struct acpi_gpe_event_info *gpe_event_info = (void *)context; |
4be44fcd LB |
508 | acpi_status status; |
509 | struct acpi_gpe_event_info local_gpe_event_info; | |
4119532c | 510 | struct acpi_evaluate_info *info; |
1da177e4 | 511 | |
b229cf92 | 512 | ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); |
1da177e4 | 513 | |
4be44fcd LB |
514 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
515 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
516 | return_VOID; |
517 | } | |
518 | ||
519 | /* Must revalidate the gpe_number/gpe_block */ | |
520 | ||
4be44fcd LB |
521 | if (!acpi_ev_valid_gpe_event(gpe_event_info)) { |
522 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
1da177e4 LT |
523 | return_VOID; |
524 | } | |
525 | ||
526 | /* Set the GPE flags for return to enabled state */ | |
527 | ||
4be44fcd | 528 | (void)acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 LT |
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 | */ | |
4be44fcd LB |
534 | ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info, |
535 | sizeof(struct acpi_gpe_event_info)); | |
1da177e4 | 536 | |
4be44fcd LB |
537 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
538 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
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 | 546 | if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 547 | ACPI_GPE_DISPATCH_METHOD) { |
1da177e4 | 548 | |
4119532c BM |
549 | /* Allocate the evaluation information block */ |
550 | ||
551 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
552 | if (!info) { | |
553 | status = AE_NO_MEMORY; | |
554 | } else { | |
555 | /* | |
556 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx | |
557 | * control method that corresponds to this GPE | |
558 | */ | |
559 | info->prefix_node = | |
560 | local_gpe_event_info.dispatch.method_node; | |
561 | info->parameters = | |
562 | ACPI_CAST_PTR(union acpi_operand_object *, | |
563 | gpe_event_info); | |
564 | info->parameter_type = ACPI_PARAM_GPE; | |
565 | info->flags = ACPI_IGNORE_RETURN_VALUE; | |
566 | ||
567 | status = acpi_ns_evaluate(info); | |
568 | ACPI_FREE(info); | |
569 | } | |
570 | ||
4be44fcd | 571 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 572 | ACPI_EXCEPTION((AE_INFO, status, |
4c90ece2 | 573 | "While evaluating GPE method [%4.4s]", |
b8e4d893 BM |
574 | acpi_ut_get_node_name |
575 | (local_gpe_event_info.dispatch. | |
4c90ece2 | 576 | method_node))); |
1da177e4 LT |
577 | } |
578 | } | |
579 | ||
44f6c012 | 580 | if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd | 581 | ACPI_GPE_LEVEL_TRIGGERED) { |
1da177e4 LT |
582 | /* |
583 | * GPE is level-triggered, we clear the GPE status bit after | |
584 | * handling the event. | |
585 | */ | |
4be44fcd LB |
586 | status = acpi_hw_clear_gpe(&local_gpe_event_info); |
587 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
588 | return_VOID; |
589 | } | |
590 | } | |
591 | ||
592 | /* Enable this GPE */ | |
593 | ||
4be44fcd | 594 | (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info); |
1da177e4 LT |
595 | return_VOID; |
596 | } | |
597 | ||
1da177e4 LT |
598 | /******************************************************************************* |
599 | * | |
600 | * FUNCTION: acpi_ev_gpe_dispatch | |
601 | * | |
44f6c012 | 602 | * PARAMETERS: gpe_event_info - Info for this GPE |
1da177e4 LT |
603 | * gpe_number - Number relative to the parent GPE block |
604 | * | |
605 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
606 | * | |
607 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) | |
608 | * or method (e.g. _Lxx/_Exx) handler. | |
609 | * | |
610 | * This function executes at interrupt level. | |
611 | * | |
612 | ******************************************************************************/ | |
613 | ||
614 | u32 | |
4be44fcd | 615 | acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
1da177e4 | 616 | { |
4be44fcd | 617 | acpi_status status; |
1da177e4 | 618 | |
b229cf92 | 619 | ACPI_FUNCTION_TRACE(ev_gpe_dispatch); |
1da177e4 LT |
620 | |
621 | /* | |
622 | * If edge-triggered, clear the GPE status bit now. Note that | |
623 | * level-triggered events are cleared after the GPE is serviced. | |
624 | */ | |
44f6c012 | 625 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
626 | ACPI_GPE_EDGE_TRIGGERED) { |
627 | status = acpi_hw_clear_gpe(gpe_event_info); | |
628 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
629 | ACPI_EXCEPTION((AE_INFO, status, |
630 | "Unable to clear GPE[%2X]", | |
631 | gpe_number)); | |
50eca3eb | 632 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
633 | } |
634 | } | |
635 | ||
636 | /* Save current system state */ | |
637 | ||
638 | if (acpi_gbl_system_awake_and_running) { | |
4be44fcd LB |
639 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING); |
640 | } else { | |
641 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_SYSTEM_RUNNING); | |
1da177e4 LT |
642 | } |
643 | ||
644 | /* | |
645 | * Dispatch the GPE to either an installed handler, or the control | |
646 | * method associated with this GPE (_Lxx or _Exx). | |
647 | * If a handler exists, we invoke it and do not attempt to run the method. | |
648 | * If there is neither a handler nor a method, we disable the level to | |
649 | * prevent further events from coming in here. | |
650 | */ | |
651 | switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { | |
652 | case ACPI_GPE_DISPATCH_HANDLER: | |
653 | ||
654 | /* | |
655 | * Invoke the installed handler (at interrupt level) | |
656 | * Ignore return status for now. TBD: leave GPE disabled on error? | |
657 | */ | |
4be44fcd LB |
658 | (void)gpe_event_info->dispatch.handler->address(gpe_event_info-> |
659 | dispatch. | |
660 | handler-> | |
661 | context); | |
1da177e4 LT |
662 | |
663 | /* It is now safe to clear level-triggered events. */ | |
664 | ||
44f6c012 | 665 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
666 | ACPI_GPE_LEVEL_TRIGGERED) { |
667 | status = acpi_hw_clear_gpe(gpe_event_info); | |
668 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
669 | ACPI_EXCEPTION((AE_INFO, status, |
670 | "Unable to clear GPE[%2X]", | |
671 | gpe_number)); | |
50eca3eb | 672 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
673 | } |
674 | } | |
675 | break; | |
676 | ||
677 | case ACPI_GPE_DISPATCH_METHOD: | |
678 | ||
679 | /* | |
680 | * Disable GPE, so it doesn't keep firing before the method has a | |
681 | * chance to run. | |
682 | */ | |
4be44fcd LB |
683 | status = acpi_ev_disable_gpe(gpe_event_info); |
684 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
685 | ACPI_EXCEPTION((AE_INFO, status, |
686 | "Unable to disable GPE[%2X]", | |
687 | gpe_number)); | |
50eca3eb | 688 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
689 | } |
690 | ||
691 | /* | |
692 | * Execute the method associated with the GPE | |
693 | * NOTE: Level-triggered GPEs are cleared after the method completes. | |
694 | */ | |
958dd242 BM |
695 | status = acpi_os_execute(OSL_GPE_HANDLER, |
696 | acpi_ev_asynch_execute_gpe_method, | |
697 | gpe_event_info); | |
4be44fcd | 698 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
699 | ACPI_EXCEPTION((AE_INFO, status, |
700 | "Unable to queue handler for GPE[%2X] - event disabled", | |
701 | gpe_number)); | |
1da177e4 LT |
702 | } |
703 | break; | |
704 | ||
705 | default: | |
706 | ||
707 | /* No handler or method to run! */ | |
708 | ||
b8e4d893 BM |
709 | ACPI_ERROR((AE_INFO, |
710 | "No handler or method for GPE[%2X], disabling event", | |
711 | gpe_number)); | |
1da177e4 LT |
712 | |
713 | /* | |
714 | * Disable the GPE. The GPE will remain disabled until the ACPI | |
715 | * Core Subsystem is restarted, or a handler is installed. | |
716 | */ | |
4be44fcd LB |
717 | status = acpi_ev_disable_gpe(gpe_event_info); |
718 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
719 | ACPI_EXCEPTION((AE_INFO, status, |
720 | "Unable to disable GPE[%2X]", | |
721 | gpe_number)); | |
50eca3eb | 722 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
723 | } |
724 | break; | |
725 | } | |
726 | ||
50eca3eb | 727 | return_UINT32(ACPI_INTERRUPT_HANDLED); |
1da177e4 LT |
728 | } |
729 | ||
1da177e4 | 730 | #ifdef ACPI_GPE_NOTIFY_CHECK |
1da177e4 LT |
731 | /******************************************************************************* |
732 | * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED | |
733 | * | |
734 | * FUNCTION: acpi_ev_check_for_wake_only_gpe | |
735 | * | |
736 | * PARAMETERS: gpe_event_info - info for this GPE | |
737 | * | |
738 | * RETURN: Status | |
739 | * | |
740 | * DESCRIPTION: Determine if a a GPE is "wake-only". | |
741 | * | |
b229cf92 | 742 | * Called from Notify() code in interpreter when a "DeviceWake" |
1da177e4 LT |
743 | * Notify comes in. |
744 | * | |
745 | ******************************************************************************/ | |
746 | ||
747 | acpi_status | |
4be44fcd | 748 | acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 749 | { |
4be44fcd | 750 | acpi_status status; |
1da177e4 | 751 | |
b229cf92 | 752 | ACPI_FUNCTION_TRACE(ev_check_for_wake_only_gpe); |
1da177e4 | 753 | |
4be44fcd LB |
754 | if ((gpe_event_info) && /* Only >0 for _Lxx/_Exx */ |
755 | ((gpe_event_info->flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) { /* System state at GPE time */ | |
1da177e4 LT |
756 | /* This must be a wake-only GPE, disable it */ |
757 | ||
4be44fcd | 758 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 LT |
759 | |
760 | /* Set GPE to wake-only. Do not change wake disabled/enabled status */ | |
761 | ||
4be44fcd | 762 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); |
1da177e4 | 763 | |
b8e4d893 BM |
764 | ACPI_INFO((AE_INFO, |
765 | "GPE %p was updated from wake/run to wake-only", | |
766 | gpe_event_info)); | |
1da177e4 LT |
767 | |
768 | /* This was a wake-only GPE */ | |
769 | ||
4be44fcd | 770 | return_ACPI_STATUS(AE_WAKE_ONLY_GPE); |
1da177e4 LT |
771 | } |
772 | ||
4be44fcd | 773 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
774 | } |
775 | #endif |