Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
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("evgpeblk") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | static acpi_status |
4be44fcd LB |
53 | acpi_ev_save_method_info(acpi_handle obj_handle, |
54 | u32 level, void *obj_desc, void **return_value); | |
44f6c012 RM |
55 | |
56 | static acpi_status | |
4be44fcd LB |
57 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
58 | u32 level, void *info, void **return_value); | |
44f6c012 | 59 | |
4be44fcd LB |
60 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
61 | interrupt_number); | |
44f6c012 RM |
62 | |
63 | static acpi_status | |
4be44fcd | 64 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
65 | |
66 | static acpi_status | |
4be44fcd LB |
67 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
68 | u32 interrupt_number); | |
44f6c012 RM |
69 | |
70 | static acpi_status | |
4be44fcd | 71 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
72 | |
73 | /******************************************************************************* | |
74 | * | |
75 | * FUNCTION: acpi_ev_valid_gpe_event | |
76 | * | |
77 | * PARAMETERS: gpe_event_info - Info for this GPE | |
78 | * | |
79 | * RETURN: TRUE if the gpe_event is valid | |
80 | * | |
96db255c | 81 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
82 | * Should be called only when the GPE lists are semaphore locked |
83 | * and not subject to change. | |
84 | * | |
85 | ******************************************************************************/ | |
86 | ||
4be44fcd | 87 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 88 | { |
4be44fcd LB |
89 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
90 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 91 | |
4be44fcd | 92 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
93 | |
94 | /* No need for spin lock since we are not changing any list elements */ | |
95 | ||
96 | /* Walk the GPE interrupt levels */ | |
97 | ||
98 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
99 | while (gpe_xrupt_block) { | |
100 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
101 | ||
102 | /* Walk the GPE blocks on this interrupt level */ | |
103 | ||
104 | while (gpe_block) { | |
105 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
4be44fcd LB |
106 | (&gpe_block-> |
107 | event_info[((acpi_size) gpe_block-> | |
108 | register_count) * 8] > | |
109 | gpe_event_info)) { | |
1da177e4 LT |
110 | return (TRUE); |
111 | } | |
112 | ||
113 | gpe_block = gpe_block->next; | |
114 | } | |
115 | ||
116 | gpe_xrupt_block = gpe_xrupt_block->next; | |
117 | } | |
118 | ||
119 | return (FALSE); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_ev_walk_gpe_list | |
125 | * | |
126 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
1da177e4 LT |
127 | * |
128 | * RETURN: Status | |
129 | * | |
130 | * DESCRIPTION: Walk the GPE lists. | |
131 | * | |
132 | ******************************************************************************/ | |
133 | ||
4be44fcd | 134 | acpi_status acpi_ev_walk_gpe_list(ACPI_GPE_CALLBACK gpe_walk_callback) |
1da177e4 | 135 | { |
4be44fcd LB |
136 | struct acpi_gpe_block_info *gpe_block; |
137 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
138 | acpi_status status = AE_OK; | |
b8e4d893 | 139 | acpi_cpu_flags flags; |
1da177e4 | 140 | |
4be44fcd | 141 | ACPI_FUNCTION_TRACE("ev_walk_gpe_list"); |
1da177e4 | 142 | |
4be44fcd | 143 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
144 | |
145 | /* Walk the interrupt level descriptor list */ | |
146 | ||
147 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
148 | while (gpe_xrupt_info) { | |
149 | /* Walk all Gpe Blocks attached to this interrupt level */ | |
150 | ||
151 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
152 | while (gpe_block) { | |
153 | /* One callback per GPE block */ | |
154 | ||
4be44fcd LB |
155 | status = gpe_walk_callback(gpe_xrupt_info, gpe_block); |
156 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
157 | goto unlock_and_exit; |
158 | } | |
159 | ||
160 | gpe_block = gpe_block->next; | |
161 | } | |
162 | ||
163 | gpe_xrupt_info = gpe_xrupt_info->next; | |
164 | } | |
165 | ||
4be44fcd LB |
166 | unlock_and_exit: |
167 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
168 | return_ACPI_STATUS(status); | |
1da177e4 LT |
169 | } |
170 | ||
44f6c012 | 171 | /******************************************************************************* |
1da177e4 LT |
172 | * |
173 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
174 | * | |
175 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
176 | * gpe_block - Gpe Block info | |
177 | * | |
178 | * RETURN: Status | |
179 | * | |
180 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
181 | * Used only prior to termination. | |
182 | * | |
183 | ******************************************************************************/ | |
184 | ||
185 | acpi_status | |
4be44fcd LB |
186 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
187 | struct acpi_gpe_block_info *gpe_block) | |
1da177e4 | 188 | { |
4be44fcd LB |
189 | struct acpi_gpe_event_info *gpe_event_info; |
190 | acpi_native_uint i; | |
191 | acpi_native_uint j; | |
1da177e4 | 192 | |
4be44fcd | 193 | ACPI_FUNCTION_TRACE("ev_delete_gpe_handlers"); |
1da177e4 LT |
194 | |
195 | /* Examine each GPE Register within the block */ | |
196 | ||
197 | for (i = 0; i < gpe_block->register_count; i++) { | |
198 | /* Now look at the individual GPEs in this byte register */ | |
199 | ||
200 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
4be44fcd LB |
201 | gpe_event_info = |
202 | &gpe_block-> | |
203 | event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 204 | |
44f6c012 | 205 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd LB |
206 | ACPI_GPE_DISPATCH_HANDLER) { |
207 | ACPI_MEM_FREE(gpe_event_info->dispatch.handler); | |
1da177e4 | 208 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
209 | gpe_event_info->flags &= |
210 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
211 | } |
212 | } | |
213 | } | |
214 | ||
4be44fcd | 215 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
216 | } |
217 | ||
1da177e4 LT |
218 | /******************************************************************************* |
219 | * | |
220 | * FUNCTION: acpi_ev_save_method_info | |
221 | * | |
222 | * PARAMETERS: Callback from walk_namespace | |
223 | * | |
224 | * RETURN: Status | |
225 | * | |
226 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
227 | * control method under the _GPE portion of the namespace. | |
228 | * Extract the name and GPE type from the object, saving this | |
229 | * information for quick lookup during GPE dispatch | |
230 | * | |
231 | * The name of each GPE control method is of the form: | |
232 | * "_Lxx" or "_Exx" | |
233 | * Where: | |
234 | * L - means that the GPE is level triggered | |
235 | * E - means that the GPE is edge triggered | |
236 | * xx - is the GPE number [in HEX] | |
237 | * | |
238 | ******************************************************************************/ | |
239 | ||
240 | static acpi_status | |
4be44fcd LB |
241 | acpi_ev_save_method_info(acpi_handle obj_handle, |
242 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 243 | { |
4be44fcd LB |
244 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
245 | struct acpi_gpe_event_info *gpe_event_info; | |
246 | u32 gpe_number; | |
247 | char name[ACPI_NAME_SIZE + 1]; | |
248 | u8 type; | |
249 | acpi_status status; | |
1da177e4 | 250 | |
4be44fcd | 251 | ACPI_FUNCTION_TRACE("ev_save_method_info"); |
1da177e4 LT |
252 | |
253 | /* | |
254 | * _Lxx and _Exx GPE method support | |
255 | * | |
256 | * 1) Extract the name from the object and convert to a string | |
257 | */ | |
4be44fcd LB |
258 | ACPI_MOVE_32_TO_32(name, |
259 | &((struct acpi_namespace_node *)obj_handle)->name. | |
260 | integer); | |
1da177e4 LT |
261 | name[ACPI_NAME_SIZE] = 0; |
262 | ||
263 | /* | |
264 | * 2) Edge/Level determination is based on the 2nd character | |
265 | * of the method name | |
266 | * | |
96db255c | 267 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
268 | * if a _PRW object is found that points to this GPE. |
269 | */ | |
270 | switch (name[1]) { | |
271 | case 'L': | |
272 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
273 | break; | |
274 | ||
275 | case 'E': | |
276 | type = ACPI_GPE_EDGE_TRIGGERED; | |
277 | break; | |
278 | ||
279 | default: | |
280 | /* Unknown method type, just ignore it! */ | |
281 | ||
b8e4d893 BM |
282 | ACPI_ERROR((AE_INFO, |
283 | "Unknown GPE method type: %s (name not of form _Lxx or _Exx)", | |
284 | name)); | |
4be44fcd | 285 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
286 | } |
287 | ||
288 | /* Convert the last two characters of the name to the GPE Number */ | |
289 | ||
4be44fcd | 290 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 LT |
291 | if (gpe_number == ACPI_UINT32_MAX) { |
292 | /* Conversion failed; invalid method, just ignore it */ | |
293 | ||
b8e4d893 BM |
294 | ACPI_ERROR((AE_INFO, |
295 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", | |
296 | name)); | |
4be44fcd | 297 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
298 | } |
299 | ||
300 | /* Ensure that we have a valid GPE number for this GPE block */ | |
301 | ||
302 | if ((gpe_number < gpe_block->block_base_number) || | |
4be44fcd LB |
303 | (gpe_number >= |
304 | (gpe_block->block_base_number + | |
305 | (gpe_block->register_count * 8)))) { | |
1da177e4 LT |
306 | /* |
307 | * Not valid for this GPE block, just ignore it | |
308 | * However, it may be valid for a different GPE block, since GPE0 and GPE1 | |
309 | * methods both appear under \_GPE. | |
310 | */ | |
4be44fcd | 311 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
312 | } |
313 | ||
314 | /* | |
315 | * Now we can add this information to the gpe_event_info block | |
96db255c | 316 | * for use during dispatch of this GPE. Default type is RUNTIME, although |
1da177e4 LT |
317 | * this may change when the _PRW methods are executed later. |
318 | */ | |
4be44fcd LB |
319 | gpe_event_info = |
320 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 321 | |
96db255c BM |
322 | gpe_event_info->flags = (u8) |
323 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 324 | |
4be44fcd LB |
325 | gpe_event_info->dispatch.method_node = |
326 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
327 | |
328 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
329 | ||
4be44fcd | 330 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 331 | |
4be44fcd LB |
332 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
333 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
334 | name, gpe_number)); | |
335 | return_ACPI_STATUS(status); | |
1da177e4 LT |
336 | } |
337 | ||
1da177e4 LT |
338 | /******************************************************************************* |
339 | * | |
340 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
341 | * | |
342 | * PARAMETERS: Callback from walk_namespace | |
343 | * | |
96db255c | 344 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
345 | * not aborted on a single _PRW failure. |
346 | * | |
347 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 348 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
349 | * number and mark the GPE as a WAKE GPE. |
350 | * | |
351 | ******************************************************************************/ | |
352 | ||
353 | static acpi_status | |
4be44fcd LB |
354 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
355 | u32 level, void *info, void **return_value) | |
1da177e4 | 356 | { |
4be44fcd LB |
357 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
358 | struct acpi_namespace_node *gpe_device; | |
359 | struct acpi_gpe_block_info *gpe_block; | |
360 | struct acpi_namespace_node *target_gpe_device; | |
361 | struct acpi_gpe_event_info *gpe_event_info; | |
362 | union acpi_operand_object *pkg_desc; | |
363 | union acpi_operand_object *obj_desc; | |
364 | u32 gpe_number; | |
365 | acpi_status status; | |
366 | ||
367 | ACPI_FUNCTION_TRACE("ev_match_prw_and_gpe"); | |
1da177e4 LT |
368 | |
369 | /* Check for a _PRW method under this device */ | |
370 | ||
4be44fcd LB |
371 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
372 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
373 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
374 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
375 | ||
4be44fcd | 376 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
377 | } |
378 | ||
379 | /* The returned _PRW package must have at least two elements */ | |
380 | ||
381 | if (pkg_desc->package.count < 2) { | |
382 | goto cleanup; | |
383 | } | |
384 | ||
385 | /* Extract pointers from the input context */ | |
386 | ||
387 | gpe_device = gpe_info->gpe_device; | |
388 | gpe_block = gpe_info->gpe_block; | |
389 | ||
390 | /* | |
391 | * The _PRW object must return a package, we are only interested | |
392 | * in the first element | |
393 | */ | |
394 | obj_desc = pkg_desc->package.elements[0]; | |
395 | ||
4be44fcd | 396 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { |
1da177e4 LT |
397 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
398 | ||
399 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
400 | ||
401 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
402 | ||
403 | gpe_number = (u32) obj_desc->integer.value; | |
4be44fcd | 404 | } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { |
1da177e4 LT |
405 | /* Package contains a GPE reference and GPE number within a GPE block */ |
406 | ||
407 | if ((obj_desc->package.count < 2) || | |
4be44fcd LB |
408 | (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != |
409 | ACPI_TYPE_LOCAL_REFERENCE) | |
410 | || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != | |
411 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
412 | goto cleanup; |
413 | } | |
414 | ||
415 | /* Get GPE block reference and decode */ | |
416 | ||
4be44fcd LB |
417 | target_gpe_device = |
418 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 419 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 420 | } else { |
1da177e4 LT |
421 | /* Unknown type, just ignore it */ |
422 | ||
423 | goto cleanup; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Is this GPE within this block? | |
428 | * | |
429 | * TRUE iff these conditions are true: | |
430 | * 1) The GPE devices match. | |
431 | * 2) The GPE index(number) is within the range of the Gpe Block | |
432 | * associated with the GPE device. | |
433 | */ | |
434 | if ((gpe_device == target_gpe_device) && | |
4be44fcd LB |
435 | (gpe_number >= gpe_block->block_base_number) && |
436 | (gpe_number < | |
437 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
438 | gpe_event_info = | |
439 | &gpe_block->event_info[gpe_number - | |
440 | gpe_block->block_base_number]; | |
1da177e4 LT |
441 | |
442 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
443 | ||
4be44fcd LB |
444 | gpe_event_info->flags &= |
445 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 446 | |
4be44fcd LB |
447 | status = |
448 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
449 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
450 | goto cleanup; |
451 | } | |
4be44fcd LB |
452 | status = |
453 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
454 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
455 | } |
456 | ||
4be44fcd LB |
457 | cleanup: |
458 | acpi_ut_remove_reference(pkg_desc); | |
459 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
460 | } |
461 | ||
1da177e4 LT |
462 | /******************************************************************************* |
463 | * | |
464 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
465 | * | |
6f42ccf2 | 466 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
467 | * |
468 | * RETURN: A GPE interrupt block | |
469 | * | |
96db255c | 470 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
1da177e4 LT |
471 | * block per unique interrupt level used for GPEs. |
472 | * Should be called only when the GPE lists are semaphore locked | |
473 | * and not subject to change. | |
474 | * | |
475 | ******************************************************************************/ | |
476 | ||
4be44fcd LB |
477 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
478 | interrupt_number) | |
1da177e4 | 479 | { |
4be44fcd LB |
480 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
481 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
482 | acpi_status status; | |
b8e4d893 | 483 | acpi_cpu_flags flags; |
1da177e4 | 484 | |
4be44fcd | 485 | ACPI_FUNCTION_TRACE("ev_get_gpe_xrupt_block"); |
1da177e4 | 486 | |
44f6c012 | 487 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
488 | |
489 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
490 | while (next_gpe_xrupt) { | |
6f42ccf2 | 491 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 492 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
493 | } |
494 | ||
495 | next_gpe_xrupt = next_gpe_xrupt->next; | |
496 | } | |
497 | ||
498 | /* Not found, must allocate a new xrupt descriptor */ | |
499 | ||
4be44fcd | 500 | gpe_xrupt = ACPI_MEM_CALLOCATE(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 501 | if (!gpe_xrupt) { |
4be44fcd | 502 | return_PTR(NULL); |
1da177e4 LT |
503 | } |
504 | ||
6f42ccf2 | 505 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
506 | |
507 | /* Install new interrupt descriptor with spin lock */ | |
508 | ||
4be44fcd | 509 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
510 | if (acpi_gbl_gpe_xrupt_list_head) { |
511 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
512 | while (next_gpe_xrupt->next) { | |
513 | next_gpe_xrupt = next_gpe_xrupt->next; | |
514 | } | |
515 | ||
516 | next_gpe_xrupt->next = gpe_xrupt; | |
517 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 518 | } else { |
1da177e4 LT |
519 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
520 | } | |
4be44fcd | 521 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
522 | |
523 | /* Install new interrupt handler if not SCI_INT */ | |
524 | ||
6f42ccf2 | 525 | if (interrupt_number != acpi_gbl_FADT->sci_int) { |
4be44fcd LB |
526 | status = acpi_os_install_interrupt_handler(interrupt_number, |
527 | acpi_ev_gpe_xrupt_handler, | |
528 | gpe_xrupt); | |
529 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
530 | ACPI_ERROR((AE_INFO, |
531 | "Could not install GPE interrupt handler at level 0x%X", | |
532 | interrupt_number)); | |
4be44fcd | 533 | return_PTR(NULL); |
1da177e4 LT |
534 | } |
535 | } | |
536 | ||
4be44fcd | 537 | return_PTR(gpe_xrupt); |
1da177e4 LT |
538 | } |
539 | ||
1da177e4 LT |
540 | /******************************************************************************* |
541 | * | |
542 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
543 | * | |
544 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
545 | * | |
546 | * RETURN: Status | |
547 | * | |
548 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
549 | * interrupt handler if not the SCI interrupt. | |
550 | * | |
551 | ******************************************************************************/ | |
552 | ||
553 | static acpi_status | |
4be44fcd | 554 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 555 | { |
4be44fcd | 556 | acpi_status status; |
b8e4d893 | 557 | acpi_cpu_flags flags; |
1da177e4 | 558 | |
4be44fcd | 559 | ACPI_FUNCTION_TRACE("ev_delete_gpe_xrupt"); |
1da177e4 LT |
560 | |
561 | /* We never want to remove the SCI interrupt handler */ | |
562 | ||
6f42ccf2 | 563 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT->sci_int) { |
1da177e4 | 564 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 565 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
566 | } |
567 | ||
568 | /* Disable this interrupt */ | |
569 | ||
96db255c BM |
570 | status = |
571 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
572 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
573 | if (ACPI_FAILURE(status)) { |
574 | return_ACPI_STATUS(status); | |
1da177e4 LT |
575 | } |
576 | ||
577 | /* Unlink the interrupt block with lock */ | |
578 | ||
4be44fcd | 579 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
580 | if (gpe_xrupt->previous) { |
581 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
582 | } | |
583 | ||
584 | if (gpe_xrupt->next) { | |
585 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
586 | } | |
4be44fcd | 587 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
588 | |
589 | /* Free the block */ | |
590 | ||
4be44fcd LB |
591 | ACPI_MEM_FREE(gpe_xrupt); |
592 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
593 | } |
594 | ||
1da177e4 LT |
595 | /******************************************************************************* |
596 | * | |
597 | * FUNCTION: acpi_ev_install_gpe_block | |
598 | * | |
599 | * PARAMETERS: gpe_block - New GPE block | |
6f42ccf2 | 600 | * interrupt_number - Xrupt to be associated with this GPE block |
1da177e4 LT |
601 | * |
602 | * RETURN: Status | |
603 | * | |
604 | * DESCRIPTION: Install new GPE block with mutex support | |
605 | * | |
606 | ******************************************************************************/ | |
607 | ||
608 | static acpi_status | |
4be44fcd LB |
609 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
610 | u32 interrupt_number) | |
1da177e4 | 611 | { |
4be44fcd LB |
612 | struct acpi_gpe_block_info *next_gpe_block; |
613 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
614 | acpi_status status; | |
b8e4d893 | 615 | acpi_cpu_flags flags; |
1da177e4 | 616 | |
4be44fcd | 617 | ACPI_FUNCTION_TRACE("ev_install_gpe_block"); |
1da177e4 | 618 | |
4be44fcd LB |
619 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
620 | if (ACPI_FAILURE(status)) { | |
621 | return_ACPI_STATUS(status); | |
1da177e4 LT |
622 | } |
623 | ||
4be44fcd | 624 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
625 | if (!gpe_xrupt_block) { |
626 | status = AE_NO_MEMORY; | |
627 | goto unlock_and_exit; | |
628 | } | |
629 | ||
44f6c012 | 630 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 631 | |
4be44fcd | 632 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
633 | if (gpe_xrupt_block->gpe_block_list_head) { |
634 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
635 | while (next_gpe_block->next) { | |
636 | next_gpe_block = next_gpe_block->next; | |
637 | } | |
638 | ||
639 | next_gpe_block->next = gpe_block; | |
640 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 641 | } else { |
1da177e4 LT |
642 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
643 | } | |
644 | ||
645 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 646 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 647 | |
4be44fcd LB |
648 | unlock_and_exit: |
649 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
650 | return_ACPI_STATUS(status); | |
1da177e4 LT |
651 | } |
652 | ||
1da177e4 LT |
653 | /******************************************************************************* |
654 | * | |
655 | * FUNCTION: acpi_ev_delete_gpe_block | |
656 | * | |
657 | * PARAMETERS: gpe_block - Existing GPE block | |
658 | * | |
659 | * RETURN: Status | |
660 | * | |
661 | * DESCRIPTION: Remove a GPE block | |
662 | * | |
663 | ******************************************************************************/ | |
664 | ||
4be44fcd | 665 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 666 | { |
4be44fcd | 667 | acpi_status status; |
b8e4d893 | 668 | acpi_cpu_flags flags; |
1da177e4 | 669 | |
4be44fcd | 670 | ACPI_FUNCTION_TRACE("ev_install_gpe_block"); |
1da177e4 | 671 | |
4be44fcd LB |
672 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
673 | if (ACPI_FAILURE(status)) { | |
674 | return_ACPI_STATUS(status); | |
1da177e4 LT |
675 | } |
676 | ||
677 | /* Disable all GPEs in this block */ | |
678 | ||
4be44fcd | 679 | status = acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block); |
1da177e4 LT |
680 | |
681 | if (!gpe_block->previous && !gpe_block->next) { | |
682 | /* This is the last gpe_block on this interrupt */ | |
683 | ||
4be44fcd LB |
684 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
685 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
686 | goto unlock_and_exit; |
687 | } | |
4be44fcd | 688 | } else { |
1da177e4 LT |
689 | /* Remove the block on this interrupt with lock */ |
690 | ||
4be44fcd | 691 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
692 | if (gpe_block->previous) { |
693 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
694 | } else { |
695 | gpe_block->xrupt_block->gpe_block_list_head = | |
696 | gpe_block->next; | |
1da177e4 LT |
697 | } |
698 | ||
699 | if (gpe_block->next) { | |
700 | gpe_block->next->previous = gpe_block->previous; | |
701 | } | |
4be44fcd | 702 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
703 | } |
704 | ||
705 | /* Free the gpe_block */ | |
706 | ||
4be44fcd LB |
707 | ACPI_MEM_FREE(gpe_block->register_info); |
708 | ACPI_MEM_FREE(gpe_block->event_info); | |
709 | ACPI_MEM_FREE(gpe_block); | |
1da177e4 | 710 | |
4be44fcd LB |
711 | unlock_and_exit: |
712 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
713 | return_ACPI_STATUS(status); | |
1da177e4 LT |
714 | } |
715 | ||
1da177e4 LT |
716 | /******************************************************************************* |
717 | * | |
718 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
719 | * | |
720 | * PARAMETERS: gpe_block - New GPE block | |
721 | * | |
722 | * RETURN: Status | |
723 | * | |
724 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
725 | * | |
726 | ******************************************************************************/ | |
727 | ||
728 | static acpi_status | |
4be44fcd | 729 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 730 | { |
4be44fcd LB |
731 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
732 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
733 | struct acpi_gpe_event_info *this_event; | |
734 | struct acpi_gpe_register_info *this_register; | |
735 | acpi_native_uint i; | |
736 | acpi_native_uint j; | |
737 | acpi_status status; | |
1da177e4 | 738 | |
4be44fcd | 739 | ACPI_FUNCTION_TRACE("ev_create_gpe_info_blocks"); |
1da177e4 LT |
740 | |
741 | /* Allocate the GPE register information block */ | |
742 | ||
4be44fcd LB |
743 | gpe_register_info = ACPI_MEM_CALLOCATE((acpi_size) gpe_block-> |
744 | register_count * | |
745 | sizeof(struct | |
746 | acpi_gpe_register_info)); | |
1da177e4 | 747 | if (!gpe_register_info) { |
b8e4d893 BM |
748 | ACPI_ERROR((AE_INFO, |
749 | "Could not allocate the gpe_register_info table")); | |
4be44fcd | 750 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
751 | } |
752 | ||
753 | /* | |
754 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 755 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 756 | */ |
4be44fcd LB |
757 | gpe_event_info = ACPI_MEM_CALLOCATE(((acpi_size) gpe_block-> |
758 | register_count * | |
759 | ACPI_GPE_REGISTER_WIDTH) * | |
760 | sizeof(struct acpi_gpe_event_info)); | |
1da177e4 | 761 | if (!gpe_event_info) { |
b8e4d893 BM |
762 | ACPI_ERROR((AE_INFO, |
763 | "Could not allocate the gpe_event_info table")); | |
1da177e4 LT |
764 | status = AE_NO_MEMORY; |
765 | goto error_exit; | |
766 | } | |
767 | ||
768 | /* Save the new Info arrays in the GPE block */ | |
769 | ||
770 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 771 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
772 | |
773 | /* | |
96db255c | 774 | * Initialize the GPE Register and Event structures. A goal of these |
1da177e4 | 775 | * tables is to hide the fact that there are two separate GPE register sets |
96db255c | 776 | * in a given GPE hardware block, the status registers occupy the first half, |
1da177e4 LT |
777 | * and the enable registers occupy the second half. |
778 | */ | |
779 | this_register = gpe_register_info; | |
4be44fcd | 780 | this_event = gpe_event_info; |
1da177e4 LT |
781 | |
782 | for (i = 0; i < gpe_block->register_count; i++) { | |
783 | /* Init the register_info for this GPE register (8 GPEs) */ | |
784 | ||
4be44fcd LB |
785 | this_register->base_gpe_number = |
786 | (u8) (gpe_block->block_base_number + | |
787 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
788 | ||
789 | ACPI_STORE_ADDRESS(this_register->status_address.address, | |
790 | (gpe_block->block_address.address + i)); | |
791 | ||
792 | ACPI_STORE_ADDRESS(this_register->enable_address.address, | |
793 | (gpe_block->block_address.address | |
794 | + i + gpe_block->register_count)); | |
795 | ||
796 | this_register->status_address.address_space_id = | |
797 | gpe_block->block_address.address_space_id; | |
798 | this_register->enable_address.address_space_id = | |
799 | gpe_block->block_address.address_space_id; | |
800 | this_register->status_address.register_bit_width = | |
801 | ACPI_GPE_REGISTER_WIDTH; | |
802 | this_register->enable_address.register_bit_width = | |
803 | ACPI_GPE_REGISTER_WIDTH; | |
804 | this_register->status_address.register_bit_offset = | |
805 | ACPI_GPE_REGISTER_WIDTH; | |
806 | this_register->enable_address.register_bit_offset = | |
807 | ACPI_GPE_REGISTER_WIDTH; | |
1da177e4 LT |
808 | |
809 | /* Init the event_info for each GPE within this register */ | |
810 | ||
811 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
812 | this_event->register_bit = acpi_gbl_decode_to8bit[j]; | |
813 | this_event->register_info = this_register; | |
814 | this_event++; | |
815 | } | |
816 | ||
96db255c BM |
817 | /* Disable all GPEs within this register */ |
818 | ||
4be44fcd LB |
819 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00, |
820 | &this_register-> | |
821 | enable_address); | |
822 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
823 | goto error_exit; |
824 | } | |
825 | ||
96db255c BM |
826 | /* Clear any pending GPE events within this register */ |
827 | ||
4be44fcd LB |
828 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF, |
829 | &this_register-> | |
830 | status_address); | |
831 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
832 | goto error_exit; |
833 | } | |
834 | ||
835 | this_register++; | |
836 | } | |
837 | ||
4be44fcd | 838 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 839 | |
4be44fcd | 840 | error_exit: |
1da177e4 | 841 | if (gpe_register_info) { |
4be44fcd | 842 | ACPI_MEM_FREE(gpe_register_info); |
1da177e4 LT |
843 | } |
844 | if (gpe_event_info) { | |
4be44fcd | 845 | ACPI_MEM_FREE(gpe_event_info); |
1da177e4 LT |
846 | } |
847 | ||
4be44fcd | 848 | return_ACPI_STATUS(status); |
1da177e4 LT |
849 | } |
850 | ||
1da177e4 LT |
851 | /******************************************************************************* |
852 | * | |
853 | * FUNCTION: acpi_ev_create_gpe_block | |
854 | * | |
855 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
856 | * gpe_block_address - Address and space_iD | |
857 | * register_count - Number of GPE register pairs in the block | |
858 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 859 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
860 | * return_gpe_block - Where the new block descriptor is returned |
861 | * | |
862 | * RETURN: Status | |
863 | * | |
96db255c BM |
864 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
865 | * the block are disabled at exit. | |
866 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
867 | * |
868 | ******************************************************************************/ | |
869 | ||
870 | acpi_status | |
4be44fcd LB |
871 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
872 | struct acpi_generic_address *gpe_block_address, | |
873 | u32 register_count, | |
874 | u8 gpe_block_base_number, | |
875 | u32 interrupt_number, | |
876 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 877 | { |
4be44fcd | 878 | acpi_status status; |
96db255c | 879 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 880 | |
4be44fcd | 881 | ACPI_FUNCTION_TRACE("ev_create_gpe_block"); |
1da177e4 LT |
882 | |
883 | if (!register_count) { | |
4be44fcd | 884 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
885 | } |
886 | ||
887 | /* Allocate a new GPE block */ | |
888 | ||
4be44fcd | 889 | gpe_block = ACPI_MEM_CALLOCATE(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 890 | if (!gpe_block) { |
4be44fcd | 891 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
892 | } |
893 | ||
894 | /* Initialize the new GPE block */ | |
895 | ||
96db255c | 896 | gpe_block->node = gpe_device; |
1da177e4 LT |
897 | gpe_block->register_count = register_count; |
898 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 899 | |
4be44fcd LB |
900 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
901 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 902 | |
96db255c BM |
903 | /* |
904 | * Create the register_info and event_info sub-structures | |
905 | * Note: disables and clears all GPEs in the block | |
906 | */ | |
4be44fcd LB |
907 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
908 | if (ACPI_FAILURE(status)) { | |
909 | ACPI_MEM_FREE(gpe_block); | |
910 | return_ACPI_STATUS(status); | |
1da177e4 LT |
911 | } |
912 | ||
96db255c | 913 | /* Install the new block in the global lists */ |
1da177e4 | 914 | |
4be44fcd LB |
915 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
916 | if (ACPI_FAILURE(status)) { | |
917 | ACPI_MEM_FREE(gpe_block); | |
918 | return_ACPI_STATUS(status); | |
1da177e4 LT |
919 | } |
920 | ||
921 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
922 | ||
4be44fcd LB |
923 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
924 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
925 | acpi_ev_save_method_info, gpe_block, | |
926 | NULL); | |
1da177e4 | 927 | |
96db255c BM |
928 | /* Return the new block */ |
929 | ||
930 | if (return_gpe_block) { | |
931 | (*return_gpe_block) = gpe_block; | |
932 | } | |
933 | ||
934 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
935 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
936 | (u32) gpe_block->block_base_number, | |
937 | (u32) (gpe_block->block_base_number + | |
938 | ((gpe_block->register_count * | |
939 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
940 | gpe_device->name.ascii, gpe_block->register_count, | |
941 | interrupt_number)); | |
942 | ||
943 | return_ACPI_STATUS(AE_OK); | |
944 | } | |
945 | ||
946 | /******************************************************************************* | |
947 | * | |
948 | * FUNCTION: acpi_ev_initialize_gpe_block | |
949 | * | |
950 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
951 | * gpe_block - Gpe Block info | |
952 | * | |
953 | * RETURN: Status | |
954 | * | |
955 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
956 | * _PRT methods associated with the block, then enable the | |
957 | * appropriate GPEs. | |
958 | * Note: Assumes namespace is locked. | |
959 | * | |
960 | ******************************************************************************/ | |
961 | ||
962 | acpi_status | |
963 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
964 | struct acpi_gpe_block_info *gpe_block) | |
965 | { | |
966 | acpi_status status; | |
967 | struct acpi_gpe_event_info *gpe_event_info; | |
968 | struct acpi_gpe_walk_info gpe_info; | |
969 | u32 wake_gpe_count; | |
970 | u32 gpe_enabled_count; | |
971 | acpi_native_uint i; | |
972 | acpi_native_uint j; | |
973 | ||
974 | ACPI_FUNCTION_TRACE("ev_initialize_gpe_block"); | |
975 | ||
976 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
977 | ||
978 | if (!gpe_block) { | |
979 | return_ACPI_STATUS(AE_OK); | |
980 | } | |
981 | ||
1da177e4 | 982 | /* |
96db255c BM |
983 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
984 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
985 | */ |
986 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
987 | /* | |
96db255c BM |
988 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
989 | * Each GPE that has one or more _PRWs that reference it is by | |
990 | * definition a wake GPE and will not be enabled while the machine | |
991 | * is running. | |
1da177e4 LT |
992 | */ |
993 | gpe_info.gpe_block = gpe_block; | |
994 | gpe_info.gpe_device = gpe_device; | |
995 | ||
4be44fcd LB |
996 | status = |
997 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
998 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
999 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1000 | NULL); | |
1da177e4 LT |
1001 | } |
1002 | ||
1003 | /* | |
96db255c BM |
1004 | * Enable all GPEs in this block that have these attributes: |
1005 | * 1) are "runtime" or "run/wake" GPEs, and | |
1006 | * 2) have a corresponding _Lxx or _Exx method | |
1007 | * | |
1008 | * Any other GPEs within this block must be enabled via the acpi_enable_gpe() | |
1009 | * external interface. | |
1da177e4 LT |
1010 | */ |
1011 | wake_gpe_count = 0; | |
1012 | gpe_enabled_count = 0; | |
1013 | ||
1014 | for (i = 0; i < gpe_block->register_count; i++) { | |
1015 | for (j = 0; j < 8; j++) { | |
1016 | /* Get the info block for this particular GPE */ | |
1017 | ||
4be44fcd LB |
1018 | gpe_event_info = |
1019 | &gpe_block-> | |
1020 | event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 1021 | |
4be44fcd LB |
1022 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
1023 | ACPI_GPE_DISPATCH_METHOD) | |
1024 | && (gpe_event_info-> | |
1025 | flags & ACPI_GPE_TYPE_RUNTIME)) { | |
1da177e4 LT |
1026 | gpe_enabled_count++; |
1027 | } | |
1028 | ||
1029 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1030 | wake_gpe_count++; | |
1031 | } | |
1032 | } | |
1033 | } | |
1034 | ||
4be44fcd LB |
1035 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1036 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1037 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1038 | |
96db255c | 1039 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1040 | |
96db255c BM |
1041 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block); |
1042 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1043 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in gpe_block %p", |
1044 | gpe_block)); | |
1da177e4 LT |
1045 | } |
1046 | ||
96db255c | 1047 | return_ACPI_STATUS(status); |
1da177e4 LT |
1048 | } |
1049 | ||
1da177e4 LT |
1050 | /******************************************************************************* |
1051 | * | |
1052 | * FUNCTION: acpi_ev_gpe_initialize | |
1053 | * | |
1054 | * PARAMETERS: None | |
1055 | * | |
1056 | * RETURN: Status | |
1057 | * | |
1058 | * DESCRIPTION: Initialize the GPE data structures | |
1059 | * | |
1060 | ******************************************************************************/ | |
1061 | ||
4be44fcd | 1062 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1063 | { |
4be44fcd LB |
1064 | u32 register_count0 = 0; |
1065 | u32 register_count1 = 0; | |
1066 | u32 gpe_number_max = 0; | |
1067 | acpi_status status; | |
1da177e4 | 1068 | |
4be44fcd | 1069 | ACPI_FUNCTION_TRACE("ev_gpe_initialize"); |
1da177e4 | 1070 | |
4be44fcd LB |
1071 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1072 | if (ACPI_FAILURE(status)) { | |
1073 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | /* | |
1077 | * Initialize the GPE Block(s) defined in the FADT | |
1078 | * | |
1079 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1080 | * section "General-Purpose Event Registers", we have: | |
1081 | * | |
1082 | * "Each register block contains two registers of equal length | |
1083 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1084 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1085 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1086 | * half the GPE1_LEN. If a generic register block is not supported | |
1087 | * then its respective block pointer and block length values in the | |
1088 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1089 | * to be the same size." | |
1090 | */ | |
1091 | ||
1092 | /* | |
1093 | * Determine the maximum GPE number for this machine. | |
1094 | * | |
1095 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1096 | * the other. | |
1097 | * | |
1098 | * If EITHER the register length OR the block address are zero, then that | |
1099 | * particular block is not supported. | |
1100 | */ | |
4be44fcd | 1101 | if (acpi_gbl_FADT->gpe0_blk_len && acpi_gbl_FADT->xgpe0_blk.address) { |
1da177e4 LT |
1102 | /* GPE block 0 exists (has both length and address > 0) */ |
1103 | ||
1104 | register_count0 = (u16) (acpi_gbl_FADT->gpe0_blk_len / 2); | |
1105 | ||
4be44fcd LB |
1106 | gpe_number_max = |
1107 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1108 | |
1109 | /* Install GPE Block 0 */ | |
1110 | ||
4be44fcd LB |
1111 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
1112 | &acpi_gbl_FADT->xgpe0_blk, | |
1113 | register_count0, 0, | |
1114 | acpi_gbl_FADT->sci_int, | |
1115 | &acpi_gbl_gpe_fadt_blocks[0]); | |
1da177e4 | 1116 | |
4be44fcd | 1117 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1118 | ACPI_EXCEPTION((AE_INFO, status, |
1119 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1120 | } |
1121 | } | |
1122 | ||
4be44fcd | 1123 | if (acpi_gbl_FADT->gpe1_blk_len && acpi_gbl_FADT->xgpe1_blk.address) { |
1da177e4 LT |
1124 | /* GPE block 1 exists (has both length and address > 0) */ |
1125 | ||
1126 | register_count1 = (u16) (acpi_gbl_FADT->gpe1_blk_len / 2); | |
1127 | ||
1128 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1129 | ||
1130 | if ((register_count0) && | |
4be44fcd | 1131 | (gpe_number_max >= acpi_gbl_FADT->gpe1_base)) { |
b8e4d893 BM |
1132 | ACPI_ERROR((AE_INFO, |
1133 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", | |
1134 | gpe_number_max, acpi_gbl_FADT->gpe1_base, | |
1135 | acpi_gbl_FADT->gpe1_base + | |
1136 | ((register_count1 * | |
1137 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1138 | |
1139 | /* Ignore GPE1 block by setting the register count to zero */ | |
1140 | ||
1141 | register_count1 = 0; | |
4be44fcd | 1142 | } else { |
1da177e4 LT |
1143 | /* Install GPE Block 1 */ |
1144 | ||
4be44fcd LB |
1145 | status = |
1146 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
1147 | &acpi_gbl_FADT->xgpe1_blk, | |
1148 | register_count1, | |
1149 | acpi_gbl_FADT->gpe1_base, | |
1150 | acpi_gbl_FADT->sci_int, | |
1151 | &acpi_gbl_gpe_fadt_blocks | |
1152 | [1]); | |
1153 | ||
1154 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1155 | ACPI_EXCEPTION((AE_INFO, status, |
1156 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | /* | |
1160 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1161 | * space. However, GPE0 always starts at GPE number zero. | |
1162 | */ | |
1163 | gpe_number_max = acpi_gbl_FADT->gpe1_base + | |
4be44fcd | 1164 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1165 | } |
1166 | } | |
1167 | ||
1168 | /* Exit if there are no GPE registers */ | |
1169 | ||
1170 | if ((register_count0 + register_count1) == 0) { | |
1171 | /* GPEs are not required by ACPI, this is OK */ | |
1172 | ||
4be44fcd LB |
1173 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1174 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1175 | status = AE_OK; |
1176 | goto cleanup; | |
1177 | } | |
1178 | ||
1179 | /* Check for Max GPE number out-of-range */ | |
1180 | ||
1181 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1182 | ACPI_ERROR((AE_INFO, |
1183 | "Maximum GPE number from FADT is too large: 0x%X", | |
1184 | gpe_number_max)); | |
1da177e4 LT |
1185 | status = AE_BAD_VALUE; |
1186 | goto cleanup; | |
1187 | } | |
1188 | ||
4be44fcd LB |
1189 | cleanup: |
1190 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1191 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1192 | } |