Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpe - General Purpose Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
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 | 123 | } |
69874165 AS |
124 | register_bit = (u8) |
125 | (1 << | |
126 | (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number)); | |
1da177e4 LT |
127 | |
128 | /* 1) Disable case. Simply clear all enable bits */ | |
129 | ||
130 | if (type == ACPI_GPE_DISABLE) { | |
4be44fcd LB |
131 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
132 | register_bit); | |
133 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); | |
134 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
135 | } |
136 | ||
137 | /* 2) Enable case. Set/Clear the appropriate enable bits */ | |
138 | ||
139 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
140 | case ACPI_GPE_TYPE_WAKE: | |
4be44fcd LB |
141 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
142 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
143 | break; |
144 | ||
145 | case ACPI_GPE_TYPE_RUNTIME: | |
4be44fcd LB |
146 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
147 | register_bit); | |
148 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
149 | break; |
150 | ||
151 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd LB |
152 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
153 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
154 | break; |
155 | ||
156 | default: | |
4be44fcd | 157 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
158 | } |
159 | ||
4be44fcd | 160 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
161 | } |
162 | ||
1da177e4 LT |
163 | /******************************************************************************* |
164 | * | |
165 | * FUNCTION: acpi_ev_enable_gpe | |
166 | * | |
167 | * PARAMETERS: gpe_event_info - GPE to enable | |
168 | * write_to_hardware - Enable now, or just mark data structs | |
169 | * (WAKE GPEs should be deferred) | |
170 | * | |
171 | * RETURN: Status | |
172 | * | |
173 | * DESCRIPTION: Enable a GPE based on the GPE type | |
174 | * | |
175 | ******************************************************************************/ | |
176 | ||
177 | acpi_status | |
4be44fcd LB |
178 | acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info, |
179 | u8 write_to_hardware) | |
1da177e4 | 180 | { |
4be44fcd | 181 | acpi_status status; |
1da177e4 | 182 | |
b229cf92 | 183 | ACPI_FUNCTION_TRACE(ev_enable_gpe); |
1da177e4 LT |
184 | |
185 | /* Make sure HW enable masks are updated */ | |
186 | ||
4be44fcd LB |
187 | status = |
188 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE); | |
189 | if (ACPI_FAILURE(status)) { | |
190 | return_ACPI_STATUS(status); | |
1da177e4 LT |
191 | } |
192 | ||
193 | /* Mark wake-enabled or HW enable, or both */ | |
194 | ||
195 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
196 | case ACPI_GPE_TYPE_WAKE: | |
197 | ||
4be44fcd | 198 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
199 | break; |
200 | ||
201 | case ACPI_GPE_TYPE_WAKE_RUN: | |
202 | ||
4be44fcd | 203 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
204 | |
205 | /*lint -fallthrough */ | |
206 | ||
207 | case ACPI_GPE_TYPE_RUNTIME: | |
208 | ||
4be44fcd | 209 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
1da177e4 LT |
210 | |
211 | if (write_to_hardware) { | |
52fc0b02 | 212 | |
1da177e4 LT |
213 | /* Clear the GPE (of stale events), then enable it */ |
214 | ||
4be44fcd LB |
215 | status = acpi_hw_clear_gpe(gpe_event_info); |
216 | if (ACPI_FAILURE(status)) { | |
217 | return_ACPI_STATUS(status); | |
1da177e4 LT |
218 | } |
219 | ||
220 | /* Enable the requested runtime GPE */ | |
221 | ||
4be44fcd | 222 | status = acpi_hw_write_gpe_enable_reg(gpe_event_info); |
1da177e4 LT |
223 | } |
224 | break; | |
225 | ||
226 | default: | |
4be44fcd | 227 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
228 | } |
229 | ||
4be44fcd | 230 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
231 | } |
232 | ||
1da177e4 LT |
233 | /******************************************************************************* |
234 | * | |
235 | * FUNCTION: acpi_ev_disable_gpe | |
236 | * | |
237 | * PARAMETERS: gpe_event_info - GPE to disable | |
238 | * | |
239 | * RETURN: Status | |
240 | * | |
241 | * DESCRIPTION: Disable a GPE based on the GPE type | |
242 | * | |
243 | ******************************************************************************/ | |
244 | ||
4be44fcd | 245 | acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 246 | { |
4be44fcd | 247 | acpi_status status; |
1da177e4 | 248 | |
b229cf92 | 249 | ACPI_FUNCTION_TRACE(ev_disable_gpe); |
1da177e4 | 250 | |
1da177e4 LT |
251 | /* Make sure HW enable masks are updated */ |
252 | ||
4be44fcd LB |
253 | status = |
254 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE); | |
255 | if (ACPI_FAILURE(status)) { | |
256 | return_ACPI_STATUS(status); | |
1da177e4 LT |
257 | } |
258 | ||
259 | /* Mark wake-disabled or HW disable, or both */ | |
260 | ||
261 | switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { | |
262 | case ACPI_GPE_TYPE_WAKE: | |
4be44fcd | 263 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
264 | break; |
265 | ||
266 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd | 267 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 | 268 | |
a7f9b1f2 | 269 | /* fallthrough */ |
1da177e4 LT |
270 | |
271 | case ACPI_GPE_TYPE_RUNTIME: | |
272 | ||
273 | /* Disable the requested runtime GPE */ | |
274 | ||
4be44fcd | 275 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
a7f9b1f2 ZR |
276 | |
277 | /* fallthrough */ | |
1da177e4 LT |
278 | |
279 | default: | |
a7f9b1f2 | 280 | acpi_hw_write_gpe_enable_reg(gpe_event_info); |
1da177e4 LT |
281 | } |
282 | ||
4be44fcd | 283 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
284 | } |
285 | ||
1da177e4 LT |
286 | /******************************************************************************* |
287 | * | |
288 | * FUNCTION: acpi_ev_get_gpe_event_info | |
289 | * | |
290 | * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 | |
291 | * gpe_number - Raw GPE number | |
292 | * | |
293 | * RETURN: A GPE event_info struct. NULL if not a valid GPE | |
294 | * | |
295 | * DESCRIPTION: Returns the event_info struct associated with this GPE. | |
296 | * Validates the gpe_block and the gpe_number | |
297 | * | |
298 | * Should be called only when the GPE lists are semaphore locked | |
299 | * and not subject to change. | |
300 | * | |
301 | ******************************************************************************/ | |
302 | ||
4be44fcd LB |
303 | struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, |
304 | u32 gpe_number) | |
1da177e4 | 305 | { |
4be44fcd LB |
306 | union acpi_operand_object *obj_desc; |
307 | struct acpi_gpe_block_info *gpe_block; | |
308 | acpi_native_uint i; | |
1da177e4 | 309 | |
4be44fcd | 310 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
311 | |
312 | /* A NULL gpe_block means use the FADT-defined GPE block(s) */ | |
313 | ||
314 | if (!gpe_device) { | |
52fc0b02 | 315 | |
1da177e4 LT |
316 | /* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
317 | ||
318 | for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { | |
319 | gpe_block = acpi_gbl_gpe_fadt_blocks[i]; | |
320 | if (gpe_block) { | |
4be44fcd LB |
321 | if ((gpe_number >= gpe_block->block_base_number) |
322 | && (gpe_number < | |
323 | gpe_block->block_base_number + | |
324 | (gpe_block->register_count * 8))) { | |
325 | return (&gpe_block-> | |
326 | event_info[gpe_number - | |
327 | gpe_block-> | |
328 | block_base_number]); | |
1da177e4 LT |
329 | } |
330 | } | |
331 | } | |
332 | ||
333 | /* The gpe_number was not in the range of either FADT GPE block */ | |
334 | ||
335 | return (NULL); | |
336 | } | |
337 | ||
338 | /* A Non-NULL gpe_device means this is a GPE Block Device */ | |
339 | ||
fd350943 LB |
340 | obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *) |
341 | gpe_device); | |
4be44fcd | 342 | if (!obj_desc || !obj_desc->device.gpe_block) { |
1da177e4 LT |
343 | return (NULL); |
344 | } | |
345 | ||
346 | gpe_block = obj_desc->device.gpe_block; | |
347 | ||
348 | if ((gpe_number >= gpe_block->block_base_number) && | |
4be44fcd LB |
349 | (gpe_number < |
350 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
351 | return (&gpe_block-> | |
352 | event_info[gpe_number - gpe_block->block_base_number]); | |
1da177e4 LT |
353 | } |
354 | ||
355 | return (NULL); | |
356 | } | |
357 | ||
1da177e4 LT |
358 | /******************************************************************************* |
359 | * | |
360 | * FUNCTION: acpi_ev_gpe_detect | |
361 | * | |
362 | * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. | |
363 | * Can have multiple GPE blocks attached. | |
364 | * | |
365 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
366 | * | |
367 | * DESCRIPTION: Detect if any GP events have occurred. This function is | |
368 | * executed at interrupt level. | |
369 | * | |
370 | ******************************************************************************/ | |
371 | ||
4be44fcd | 372 | u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list) |
1da177e4 | 373 | { |
0897831b BM |
374 | acpi_status status; |
375 | struct acpi_gpe_block_info *gpe_block; | |
376 | struct acpi_gpe_register_info *gpe_register_info; | |
4be44fcd LB |
377 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
378 | u8 enabled_status_byte; | |
4be44fcd LB |
379 | u32 status_reg; |
380 | u32 enable_reg; | |
b8e4d893 | 381 | acpi_cpu_flags flags; |
4be44fcd LB |
382 | acpi_native_uint i; |
383 | acpi_native_uint j; | |
384 | ||
b229cf92 | 385 | ACPI_FUNCTION_NAME(ev_gpe_detect); |
1da177e4 LT |
386 | |
387 | /* Check for the case where there are no GPEs */ | |
388 | ||
389 | if (!gpe_xrupt_list) { | |
390 | return (int_status); | |
391 | } | |
392 | ||
967440e3 BM |
393 | /* |
394 | * We need to obtain the GPE lock for both the data structs and registers | |
395 | * Note: Not necessary to obtain the hardware lock, since the GPE registers | |
396 | * are owned by the gpe_lock. | |
397 | */ | |
4be44fcd | 398 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
4c90ece2 BM |
399 | |
400 | /* Examine all GPE blocks attached to this interrupt level */ | |
401 | ||
1da177e4 LT |
402 | gpe_block = gpe_xrupt_list->gpe_block_list_head; |
403 | while (gpe_block) { | |
404 | /* | |
405 | * Read all of the 8-bit GPE status and enable registers | |
406 | * in this GPE block, saving all of them. | |
407 | * Find all currently active GP events. | |
408 | */ | |
409 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 410 | |
1da177e4 LT |
411 | /* Get the next status/enable pair */ |
412 | ||
413 | gpe_register_info = &gpe_block->register_info[i]; | |
414 | ||
415 | /* Read the Status Register */ | |
416 | ||
4be44fcd LB |
417 | status = |
418 | acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, | |
419 | &status_reg, | |
420 | &gpe_register_info-> | |
421 | status_address); | |
422 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
423 | goto unlock_and_exit; |
424 | } | |
425 | ||
426 | /* Read the Enable Register */ | |
427 | ||
4be44fcd LB |
428 | status = |
429 | acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH, | |
430 | &enable_reg, | |
431 | &gpe_register_info-> | |
432 | enable_address); | |
433 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
434 | goto unlock_and_exit; |
435 | } | |
436 | ||
4be44fcd LB |
437 | ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
438 | "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", | |
439 | gpe_register_info->base_gpe_number, | |
440 | status_reg, enable_reg)); | |
1da177e4 | 441 | |
44f6c012 | 442 | /* Check if there is anything active at all in this register */ |
1da177e4 LT |
443 | |
444 | enabled_status_byte = (u8) (status_reg & enable_reg); | |
445 | if (!enabled_status_byte) { | |
52fc0b02 | 446 | |
1da177e4 LT |
447 | /* No active GPEs in this register, move on */ |
448 | ||
449 | continue; | |
450 | } | |
451 | ||
452 | /* Now look at the individual GPEs in this byte register */ | |
453 | ||
454 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
52fc0b02 | 455 | |
1da177e4 LT |
456 | /* Examine one GPE bit */ |
457 | ||
69874165 | 458 | if (enabled_status_byte & (1 << j)) { |
1da177e4 LT |
459 | /* |
460 | * Found an active GPE. Dispatch the event to a handler | |
461 | * or method. | |
462 | */ | |
4be44fcd LB |
463 | int_status |= |
464 | acpi_ev_gpe_dispatch(&gpe_block-> | |
465 | event_info[(i * | |
466 | ACPI_GPE_REGISTER_WIDTH) | |
467 | + | |
468 | j], | |
469 | (u32) j + | |
470 | gpe_register_info-> | |
471 | base_gpe_number); | |
1da177e4 LT |
472 | } |
473 | } | |
474 | } | |
475 | ||
476 | gpe_block = gpe_block->next; | |
477 | } | |
478 | ||
4be44fcd | 479 | unlock_and_exit: |
1da177e4 | 480 | |
4be44fcd | 481 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
482 | return (int_status); |
483 | } | |
484 | ||
1da177e4 LT |
485 | /******************************************************************************* |
486 | * | |
487 | * FUNCTION: acpi_ev_asynch_execute_gpe_method | |
488 | * | |
489 | * PARAMETERS: Context (gpe_event_info) - Info for this GPE | |
490 | * | |
491 | * RETURN: None | |
492 | * | |
4119532c BM |
493 | * DESCRIPTION: Perform the actual execution of a GPE control method. This |
494 | * function is called from an invocation of acpi_os_execute and | |
495 | * therefore does NOT execute at interrupt level - so that | |
1da177e4 LT |
496 | * the control method itself is not executed in the context of |
497 | * an interrupt handler. | |
498 | * | |
499 | ******************************************************************************/ | |
17bc54ee | 500 | static void acpi_ev_asynch_enable_gpe(void *context); |
1da177e4 | 501 | |
4be44fcd | 502 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) |
1da177e4 | 503 | { |
4be44fcd | 504 | struct acpi_gpe_event_info *gpe_event_info = (void *)context; |
4be44fcd LB |
505 | acpi_status status; |
506 | struct acpi_gpe_event_info local_gpe_event_info; | |
4119532c | 507 | struct acpi_evaluate_info *info; |
1da177e4 | 508 | |
b229cf92 | 509 | ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); |
1da177e4 | 510 | |
4be44fcd LB |
511 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
512 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
513 | return_VOID; |
514 | } | |
515 | ||
516 | /* Must revalidate the gpe_number/gpe_block */ | |
517 | ||
4be44fcd LB |
518 | if (!acpi_ev_valid_gpe_event(gpe_event_info)) { |
519 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
1da177e4 LT |
520 | return_VOID; |
521 | } | |
522 | ||
523 | /* Set the GPE flags for return to enabled state */ | |
524 | ||
4be44fcd | 525 | (void)acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 LT |
526 | |
527 | /* | |
528 | * Take a snapshot of the GPE info for this level - we copy the | |
529 | * info to prevent a race condition with remove_handler/remove_block. | |
530 | */ | |
4be44fcd LB |
531 | ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info, |
532 | sizeof(struct acpi_gpe_event_info)); | |
1da177e4 | 533 | |
4be44fcd LB |
534 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
535 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
536 | return_VOID; |
537 | } | |
538 | ||
539 | /* | |
540 | * Must check for control method type dispatch one more | |
541 | * time to avoid race with ev_gpe_install_handler | |
542 | */ | |
44f6c012 | 543 | if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 544 | ACPI_GPE_DISPATCH_METHOD) { |
1da177e4 | 545 | |
4119532c BM |
546 | /* Allocate the evaluation information block */ |
547 | ||
548 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); | |
549 | if (!info) { | |
550 | status = AE_NO_MEMORY; | |
551 | } else { | |
552 | /* | |
553 | * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx | |
554 | * control method that corresponds to this GPE | |
555 | */ | |
556 | info->prefix_node = | |
557 | local_gpe_event_info.dispatch.method_node; | |
558 | info->parameters = | |
559 | ACPI_CAST_PTR(union acpi_operand_object *, | |
560 | gpe_event_info); | |
561 | info->parameter_type = ACPI_PARAM_GPE; | |
562 | info->flags = ACPI_IGNORE_RETURN_VALUE; | |
563 | ||
564 | status = acpi_ns_evaluate(info); | |
565 | ACPI_FREE(info); | |
566 | } | |
567 | ||
4be44fcd | 568 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 569 | ACPI_EXCEPTION((AE_INFO, status, |
2e42005b | 570 | "while evaluating GPE method [%4.4s]", |
b8e4d893 BM |
571 | acpi_ut_get_node_name |
572 | (local_gpe_event_info.dispatch. | |
4c90ece2 | 573 | method_node))); |
1da177e4 LT |
574 | } |
575 | } | |
17bc54ee AS |
576 | /* Defer enabling of GPE until all notify handlers are done */ |
577 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe, | |
578 | gpe_event_info); | |
579 | return_VOID; | |
580 | } | |
1da177e4 | 581 | |
17bc54ee AS |
582 | static void acpi_ev_asynch_enable_gpe(void *context) |
583 | { | |
584 | struct acpi_gpe_event_info *gpe_event_info = context; | |
585 | acpi_status status; | |
586 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == | |
4be44fcd | 587 | ACPI_GPE_LEVEL_TRIGGERED) { |
1da177e4 LT |
588 | /* |
589 | * GPE is level-triggered, we clear the GPE status bit after | |
590 | * handling the event. | |
591 | */ | |
17bc54ee | 592 | status = acpi_hw_clear_gpe(gpe_event_info); |
4be44fcd | 593 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
594 | return_VOID; |
595 | } | |
596 | } | |
597 | ||
598 | /* Enable this GPE */ | |
17bc54ee | 599 | (void)acpi_hw_write_gpe_enable_reg(gpe_event_info); |
1da177e4 LT |
600 | return_VOID; |
601 | } | |
602 | ||
1da177e4 LT |
603 | /******************************************************************************* |
604 | * | |
605 | * FUNCTION: acpi_ev_gpe_dispatch | |
606 | * | |
44f6c012 | 607 | * PARAMETERS: gpe_event_info - Info for this GPE |
1da177e4 LT |
608 | * gpe_number - Number relative to the parent GPE block |
609 | * | |
610 | * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED | |
611 | * | |
612 | * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) | |
613 | * or method (e.g. _Lxx/_Exx) handler. | |
614 | * | |
615 | * This function executes at interrupt level. | |
616 | * | |
617 | ******************************************************************************/ | |
618 | ||
619 | u32 | |
4be44fcd | 620 | acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
1da177e4 | 621 | { |
4be44fcd | 622 | acpi_status status; |
1da177e4 | 623 | |
b229cf92 | 624 | ACPI_FUNCTION_TRACE(ev_gpe_dispatch); |
1da177e4 | 625 | |
5229e87d | 626 | acpi_os_gpe_count(gpe_number); |
fdffb72d | 627 | |
1da177e4 LT |
628 | /* |
629 | * If edge-triggered, clear the GPE status bit now. Note that | |
630 | * level-triggered events are cleared after the GPE is serviced. | |
631 | */ | |
44f6c012 | 632 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
633 | ACPI_GPE_EDGE_TRIGGERED) { |
634 | status = acpi_hw_clear_gpe(gpe_event_info); | |
635 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
636 | ACPI_EXCEPTION((AE_INFO, status, |
637 | "Unable to clear GPE[%2X]", | |
638 | gpe_number)); | |
50eca3eb | 639 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
640 | } |
641 | } | |
642 | ||
1da177e4 | 643 | /* |
c5a71569 BM |
644 | * Dispatch the GPE to either an installed handler, or the control method |
645 | * associated with this GPE (_Lxx or _Exx). If a handler exists, we invoke | |
646 | * it and do not attempt to run the method. If there is neither a handler | |
647 | * nor a method, we disable this GPE to prevent further such pointless | |
648 | * events from firing. | |
1da177e4 LT |
649 | */ |
650 | switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { | |
651 | case ACPI_GPE_DISPATCH_HANDLER: | |
652 | ||
653 | /* | |
654 | * Invoke the installed handler (at interrupt level) | |
655 | * Ignore return status for now. TBD: leave GPE disabled on error? | |
656 | */ | |
4be44fcd LB |
657 | (void)gpe_event_info->dispatch.handler->address(gpe_event_info-> |
658 | dispatch. | |
659 | handler-> | |
660 | context); | |
1da177e4 LT |
661 | |
662 | /* It is now safe to clear level-triggered events. */ | |
663 | ||
44f6c012 | 664 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
665 | ACPI_GPE_LEVEL_TRIGGERED) { |
666 | status = acpi_hw_clear_gpe(gpe_event_info); | |
667 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
668 | ACPI_EXCEPTION((AE_INFO, status, |
669 | "Unable to clear GPE[%2X]", | |
670 | gpe_number)); | |
50eca3eb | 671 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
672 | } |
673 | } | |
674 | break; | |
675 | ||
676 | case ACPI_GPE_DISPATCH_METHOD: | |
677 | ||
678 | /* | |
c5a71569 BM |
679 | * Disable the GPE, so it doesn't keep firing before the method has a |
680 | * chance to run (it runs asynchronously with interrupts enabled). | |
1da177e4 | 681 | */ |
4be44fcd LB |
682 | status = acpi_ev_disable_gpe(gpe_event_info); |
683 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
684 | ACPI_EXCEPTION((AE_INFO, status, |
685 | "Unable to disable GPE[%2X]", | |
686 | gpe_number)); | |
50eca3eb | 687 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
688 | } |
689 | ||
690 | /* | |
691 | * Execute the method associated with the GPE | |
692 | * NOTE: Level-triggered GPEs are cleared after the method completes. | |
693 | */ | |
958dd242 BM |
694 | status = acpi_os_execute(OSL_GPE_HANDLER, |
695 | acpi_ev_asynch_execute_gpe_method, | |
696 | gpe_event_info); | |
4be44fcd | 697 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
698 | ACPI_EXCEPTION((AE_INFO, status, |
699 | "Unable to queue handler for GPE[%2X] - event disabled", | |
700 | gpe_number)); | |
1da177e4 LT |
701 | } |
702 | break; | |
703 | ||
704 | default: | |
705 | ||
706 | /* No handler or method to run! */ | |
707 | ||
b8e4d893 BM |
708 | ACPI_ERROR((AE_INFO, |
709 | "No handler or method for GPE[%2X], disabling event", | |
710 | gpe_number)); | |
1da177e4 LT |
711 | |
712 | /* | |
c5a71569 | 713 | * Disable the GPE. The GPE will remain disabled until the ACPI |
1da177e4 LT |
714 | * Core Subsystem is restarted, or a handler is installed. |
715 | */ | |
4be44fcd LB |
716 | status = acpi_ev_disable_gpe(gpe_event_info); |
717 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
718 | ACPI_EXCEPTION((AE_INFO, status, |
719 | "Unable to disable GPE[%2X]", | |
720 | gpe_number)); | |
50eca3eb | 721 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
722 | } |
723 | break; | |
724 | } | |
725 | ||
50eca3eb | 726 | return_UINT32(ACPI_INTERRUPT_HANDLED); |
1da177e4 | 727 | } |