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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
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("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 | ||
61686124 | 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 | |
b229cf92 | 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) { | |
52fc0b02 | 149 | |
1da177e4 LT |
150 | /* Walk all Gpe Blocks attached to this interrupt level */ |
151 | ||
152 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
153 | while (gpe_block) { | |
52fc0b02 | 154 | |
1da177e4 LT |
155 | /* One callback per GPE block */ |
156 | ||
4be44fcd LB |
157 | status = gpe_walk_callback(gpe_xrupt_info, gpe_block); |
158 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
159 | goto unlock_and_exit; |
160 | } | |
161 | ||
162 | gpe_block = gpe_block->next; | |
163 | } | |
164 | ||
165 | gpe_xrupt_info = gpe_xrupt_info->next; | |
166 | } | |
167 | ||
4be44fcd LB |
168 | unlock_and_exit: |
169 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
170 | return_ACPI_STATUS(status); | |
1da177e4 LT |
171 | } |
172 | ||
44f6c012 | 173 | /******************************************************************************* |
1da177e4 LT |
174 | * |
175 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
176 | * | |
177 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
178 | * gpe_block - Gpe Block info | |
179 | * | |
180 | * RETURN: Status | |
181 | * | |
182 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
183 | * Used only prior to termination. | |
184 | * | |
185 | ******************************************************************************/ | |
186 | ||
187 | acpi_status | |
4be44fcd LB |
188 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
189 | struct acpi_gpe_block_info *gpe_block) | |
1da177e4 | 190 | { |
4be44fcd | 191 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
192 | u32 i; |
193 | u32 j; | |
1da177e4 | 194 | |
b229cf92 | 195 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
196 | |
197 | /* Examine each GPE Register within the block */ | |
198 | ||
199 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 200 | |
1da177e4 LT |
201 | /* Now look at the individual GPEs in this byte register */ |
202 | ||
203 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
4be44fcd LB |
204 | gpe_event_info = |
205 | &gpe_block-> | |
67a119f9 BM |
206 | event_info[((acpi_size) i * |
207 | ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 208 | |
44f6c012 | 209 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 210 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 211 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 212 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
213 | gpe_event_info->flags &= |
214 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
215 | } |
216 | } | |
217 | } | |
218 | ||
4be44fcd | 219 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
220 | } |
221 | ||
1da177e4 LT |
222 | /******************************************************************************* |
223 | * | |
224 | * FUNCTION: acpi_ev_save_method_info | |
225 | * | |
226 | * PARAMETERS: Callback from walk_namespace | |
227 | * | |
228 | * RETURN: Status | |
229 | * | |
230 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
231 | * control method under the _GPE portion of the namespace. | |
232 | * Extract the name and GPE type from the object, saving this | |
233 | * information for quick lookup during GPE dispatch | |
234 | * | |
235 | * The name of each GPE control method is of the form: | |
236 | * "_Lxx" or "_Exx" | |
237 | * Where: | |
238 | * L - means that the GPE is level triggered | |
239 | * E - means that the GPE is edge triggered | |
240 | * xx - is the GPE number [in HEX] | |
241 | * | |
242 | ******************************************************************************/ | |
243 | ||
244 | static acpi_status | |
4be44fcd LB |
245 | acpi_ev_save_method_info(acpi_handle obj_handle, |
246 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 247 | { |
4be44fcd LB |
248 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
249 | struct acpi_gpe_event_info *gpe_event_info; | |
250 | u32 gpe_number; | |
251 | char name[ACPI_NAME_SIZE + 1]; | |
252 | u8 type; | |
253 | acpi_status status; | |
1da177e4 | 254 | |
b229cf92 | 255 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
256 | |
257 | /* | |
258 | * _Lxx and _Exx GPE method support | |
259 | * | |
260 | * 1) Extract the name from the object and convert to a string | |
261 | */ | |
4be44fcd LB |
262 | ACPI_MOVE_32_TO_32(name, |
263 | &((struct acpi_namespace_node *)obj_handle)->name. | |
264 | integer); | |
1da177e4 LT |
265 | name[ACPI_NAME_SIZE] = 0; |
266 | ||
267 | /* | |
268 | * 2) Edge/Level determination is based on the 2nd character | |
269 | * of the method name | |
270 | * | |
96db255c | 271 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
272 | * if a _PRW object is found that points to this GPE. |
273 | */ | |
274 | switch (name[1]) { | |
275 | case 'L': | |
276 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
277 | break; | |
278 | ||
279 | case 'E': | |
280 | type = ACPI_GPE_EDGE_TRIGGERED; | |
281 | break; | |
282 | ||
283 | default: | |
284 | /* Unknown method type, just ignore it! */ | |
285 | ||
b229cf92 BM |
286 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
287 | "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)", | |
288 | name)); | |
4be44fcd | 289 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
290 | } |
291 | ||
292 | /* Convert the last two characters of the name to the GPE Number */ | |
293 | ||
4be44fcd | 294 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 295 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 296 | |
1da177e4 LT |
297 | /* Conversion failed; invalid method, just ignore it */ |
298 | ||
b229cf92 BM |
299 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
300 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", | |
301 | name)); | |
4be44fcd | 302 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
303 | } |
304 | ||
305 | /* Ensure that we have a valid GPE number for this GPE block */ | |
306 | ||
307 | if ((gpe_number < gpe_block->block_base_number) || | |
4be44fcd LB |
308 | (gpe_number >= |
309 | (gpe_block->block_base_number + | |
310 | (gpe_block->register_count * 8)))) { | |
1da177e4 LT |
311 | /* |
312 | * Not valid for this GPE block, just ignore it | |
313 | * However, it may be valid for a different GPE block, since GPE0 and GPE1 | |
314 | * methods both appear under \_GPE. | |
315 | */ | |
4be44fcd | 316 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
317 | } |
318 | ||
319 | /* | |
320 | * Now we can add this information to the gpe_event_info block | |
96db255c | 321 | * for use during dispatch of this GPE. Default type is RUNTIME, although |
1da177e4 LT |
322 | * this may change when the _PRW methods are executed later. |
323 | */ | |
4be44fcd LB |
324 | gpe_event_info = |
325 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 326 | |
96db255c BM |
327 | gpe_event_info->flags = (u8) |
328 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 329 | |
4be44fcd LB |
330 | gpe_event_info->dispatch.method_node = |
331 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
332 | |
333 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
334 | ||
4be44fcd | 335 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 336 | |
4be44fcd LB |
337 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
338 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
339 | name, gpe_number)); | |
340 | return_ACPI_STATUS(status); | |
1da177e4 LT |
341 | } |
342 | ||
1da177e4 LT |
343 | /******************************************************************************* |
344 | * | |
345 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
346 | * | |
347 | * PARAMETERS: Callback from walk_namespace | |
348 | * | |
96db255c | 349 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
350 | * not aborted on a single _PRW failure. |
351 | * | |
352 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 353 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
354 | * number and mark the GPE as a WAKE GPE. |
355 | * | |
356 | ******************************************************************************/ | |
357 | ||
358 | static acpi_status | |
4be44fcd LB |
359 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
360 | u32 level, void *info, void **return_value) | |
1da177e4 | 361 | { |
4be44fcd LB |
362 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
363 | struct acpi_namespace_node *gpe_device; | |
364 | struct acpi_gpe_block_info *gpe_block; | |
365 | struct acpi_namespace_node *target_gpe_device; | |
366 | struct acpi_gpe_event_info *gpe_event_info; | |
367 | union acpi_operand_object *pkg_desc; | |
368 | union acpi_operand_object *obj_desc; | |
369 | u32 gpe_number; | |
370 | acpi_status status; | |
371 | ||
b229cf92 | 372 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
373 | |
374 | /* Check for a _PRW method under this device */ | |
375 | ||
4be44fcd LB |
376 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
377 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
378 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 379 | |
1da177e4 LT |
380 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
381 | ||
4be44fcd | 382 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
383 | } |
384 | ||
385 | /* The returned _PRW package must have at least two elements */ | |
386 | ||
387 | if (pkg_desc->package.count < 2) { | |
388 | goto cleanup; | |
389 | } | |
390 | ||
391 | /* Extract pointers from the input context */ | |
392 | ||
393 | gpe_device = gpe_info->gpe_device; | |
394 | gpe_block = gpe_info->gpe_block; | |
395 | ||
396 | /* | |
397 | * The _PRW object must return a package, we are only interested | |
398 | * in the first element | |
399 | */ | |
400 | obj_desc = pkg_desc->package.elements[0]; | |
401 | ||
4be44fcd | 402 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { |
52fc0b02 | 403 | |
1da177e4 LT |
404 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
405 | ||
406 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
407 | ||
408 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
409 | ||
410 | gpe_number = (u32) obj_desc->integer.value; | |
4be44fcd | 411 | } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 412 | |
1da177e4 LT |
413 | /* Package contains a GPE reference and GPE number within a GPE block */ |
414 | ||
415 | if ((obj_desc->package.count < 2) || | |
4be44fcd LB |
416 | (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != |
417 | ACPI_TYPE_LOCAL_REFERENCE) | |
418 | || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != | |
419 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
420 | goto cleanup; |
421 | } | |
422 | ||
423 | /* Get GPE block reference and decode */ | |
424 | ||
4be44fcd LB |
425 | target_gpe_device = |
426 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 427 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 428 | } else { |
1da177e4 LT |
429 | /* Unknown type, just ignore it */ |
430 | ||
431 | goto cleanup; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Is this GPE within this block? | |
436 | * | |
437 | * TRUE iff these conditions are true: | |
438 | * 1) The GPE devices match. | |
439 | * 2) The GPE index(number) is within the range of the Gpe Block | |
440 | * associated with the GPE device. | |
441 | */ | |
442 | if ((gpe_device == target_gpe_device) && | |
4be44fcd LB |
443 | (gpe_number >= gpe_block->block_base_number) && |
444 | (gpe_number < | |
445 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
446 | gpe_event_info = | |
447 | &gpe_block->event_info[gpe_number - | |
448 | gpe_block->block_base_number]; | |
1da177e4 LT |
449 | |
450 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
451 | ||
4be44fcd LB |
452 | gpe_event_info->flags &= |
453 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 454 | |
4be44fcd LB |
455 | status = |
456 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
457 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
458 | goto cleanup; |
459 | } | |
4be44fcd LB |
460 | status = |
461 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
462 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
463 | } |
464 | ||
4be44fcd LB |
465 | cleanup: |
466 | acpi_ut_remove_reference(pkg_desc); | |
467 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
468 | } |
469 | ||
1da177e4 LT |
470 | /******************************************************************************* |
471 | * | |
472 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
473 | * | |
6f42ccf2 | 474 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
475 | * |
476 | * RETURN: A GPE interrupt block | |
477 | * | |
96db255c | 478 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
1da177e4 LT |
479 | * block per unique interrupt level used for GPEs. |
480 | * Should be called only when the GPE lists are semaphore locked | |
481 | * and not subject to change. | |
482 | * | |
483 | ******************************************************************************/ | |
484 | ||
4be44fcd LB |
485 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
486 | interrupt_number) | |
1da177e4 | 487 | { |
4be44fcd LB |
488 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
489 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
490 | acpi_status status; | |
b8e4d893 | 491 | acpi_cpu_flags flags; |
1da177e4 | 492 | |
b229cf92 | 493 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 494 | |
44f6c012 | 495 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
496 | |
497 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
498 | while (next_gpe_xrupt) { | |
6f42ccf2 | 499 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 500 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
501 | } |
502 | ||
503 | next_gpe_xrupt = next_gpe_xrupt->next; | |
504 | } | |
505 | ||
506 | /* Not found, must allocate a new xrupt descriptor */ | |
507 | ||
8313524a | 508 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 509 | if (!gpe_xrupt) { |
4be44fcd | 510 | return_PTR(NULL); |
1da177e4 LT |
511 | } |
512 | ||
6f42ccf2 | 513 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
514 | |
515 | /* Install new interrupt descriptor with spin lock */ | |
516 | ||
4be44fcd | 517 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
518 | if (acpi_gbl_gpe_xrupt_list_head) { |
519 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
520 | while (next_gpe_xrupt->next) { | |
521 | next_gpe_xrupt = next_gpe_xrupt->next; | |
522 | } | |
523 | ||
524 | next_gpe_xrupt->next = gpe_xrupt; | |
525 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 526 | } else { |
1da177e4 LT |
527 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
528 | } | |
4be44fcd | 529 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
530 | |
531 | /* Install new interrupt handler if not SCI_INT */ | |
532 | ||
f3d2e786 | 533 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
534 | status = acpi_os_install_interrupt_handler(interrupt_number, |
535 | acpi_ev_gpe_xrupt_handler, | |
536 | gpe_xrupt); | |
537 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
538 | ACPI_ERROR((AE_INFO, |
539 | "Could not install GPE interrupt handler at level 0x%X", | |
540 | interrupt_number)); | |
4be44fcd | 541 | return_PTR(NULL); |
1da177e4 LT |
542 | } |
543 | } | |
544 | ||
4be44fcd | 545 | return_PTR(gpe_xrupt); |
1da177e4 LT |
546 | } |
547 | ||
1da177e4 LT |
548 | /******************************************************************************* |
549 | * | |
550 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
551 | * | |
552 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
553 | * | |
554 | * RETURN: Status | |
555 | * | |
556 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
557 | * interrupt handler if not the SCI interrupt. | |
558 | * | |
559 | ******************************************************************************/ | |
560 | ||
561 | static acpi_status | |
4be44fcd | 562 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 563 | { |
4be44fcd | 564 | acpi_status status; |
b8e4d893 | 565 | acpi_cpu_flags flags; |
1da177e4 | 566 | |
b229cf92 | 567 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
568 | |
569 | /* We never want to remove the SCI interrupt handler */ | |
570 | ||
f3d2e786 | 571 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 572 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 573 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
574 | } |
575 | ||
576 | /* Disable this interrupt */ | |
577 | ||
96db255c BM |
578 | status = |
579 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
580 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
581 | if (ACPI_FAILURE(status)) { |
582 | return_ACPI_STATUS(status); | |
1da177e4 LT |
583 | } |
584 | ||
585 | /* Unlink the interrupt block with lock */ | |
586 | ||
4be44fcd | 587 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
588 | if (gpe_xrupt->previous) { |
589 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
590 | } else { |
591 | /* No previous, update list head */ | |
592 | ||
593 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
594 | } |
595 | ||
596 | if (gpe_xrupt->next) { | |
597 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
598 | } | |
4be44fcd | 599 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
600 | |
601 | /* Free the block */ | |
602 | ||
8313524a | 603 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 604 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
605 | } |
606 | ||
1da177e4 LT |
607 | /******************************************************************************* |
608 | * | |
609 | * FUNCTION: acpi_ev_install_gpe_block | |
610 | * | |
611 | * PARAMETERS: gpe_block - New GPE block | |
6f42ccf2 | 612 | * interrupt_number - Xrupt to be associated with this GPE block |
1da177e4 LT |
613 | * |
614 | * RETURN: Status | |
615 | * | |
616 | * DESCRIPTION: Install new GPE block with mutex support | |
617 | * | |
618 | ******************************************************************************/ | |
619 | ||
620 | static acpi_status | |
4be44fcd LB |
621 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
622 | u32 interrupt_number) | |
1da177e4 | 623 | { |
4be44fcd LB |
624 | struct acpi_gpe_block_info *next_gpe_block; |
625 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
626 | acpi_status status; | |
b8e4d893 | 627 | acpi_cpu_flags flags; |
1da177e4 | 628 | |
b229cf92 | 629 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 630 | |
4be44fcd LB |
631 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
632 | if (ACPI_FAILURE(status)) { | |
633 | return_ACPI_STATUS(status); | |
1da177e4 LT |
634 | } |
635 | ||
4be44fcd | 636 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
637 | if (!gpe_xrupt_block) { |
638 | status = AE_NO_MEMORY; | |
639 | goto unlock_and_exit; | |
640 | } | |
641 | ||
44f6c012 | 642 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 643 | |
4be44fcd | 644 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
645 | if (gpe_xrupt_block->gpe_block_list_head) { |
646 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
647 | while (next_gpe_block->next) { | |
648 | next_gpe_block = next_gpe_block->next; | |
649 | } | |
650 | ||
651 | next_gpe_block->next = gpe_block; | |
652 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 653 | } else { |
1da177e4 LT |
654 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
655 | } | |
656 | ||
657 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 658 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 659 | |
4be44fcd LB |
660 | unlock_and_exit: |
661 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
662 | return_ACPI_STATUS(status); | |
1da177e4 LT |
663 | } |
664 | ||
1da177e4 LT |
665 | /******************************************************************************* |
666 | * | |
667 | * FUNCTION: acpi_ev_delete_gpe_block | |
668 | * | |
669 | * PARAMETERS: gpe_block - Existing GPE block | |
670 | * | |
671 | * RETURN: Status | |
672 | * | |
673 | * DESCRIPTION: Remove a GPE block | |
674 | * | |
675 | ******************************************************************************/ | |
676 | ||
4be44fcd | 677 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 678 | { |
4be44fcd | 679 | acpi_status status; |
b8e4d893 | 680 | acpi_cpu_flags flags; |
1da177e4 | 681 | |
b229cf92 | 682 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 683 | |
4be44fcd LB |
684 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
685 | if (ACPI_FAILURE(status)) { | |
686 | return_ACPI_STATUS(status); | |
1da177e4 LT |
687 | } |
688 | ||
689 | /* Disable all GPEs in this block */ | |
690 | ||
4be44fcd | 691 | status = acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block); |
1da177e4 LT |
692 | |
693 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 694 | |
1da177e4 LT |
695 | /* This is the last gpe_block on this interrupt */ |
696 | ||
4be44fcd LB |
697 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
698 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
699 | goto unlock_and_exit; |
700 | } | |
4be44fcd | 701 | } else { |
1da177e4 LT |
702 | /* Remove the block on this interrupt with lock */ |
703 | ||
4be44fcd | 704 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
705 | if (gpe_block->previous) { |
706 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
707 | } else { |
708 | gpe_block->xrupt_block->gpe_block_list_head = | |
709 | gpe_block->next; | |
1da177e4 LT |
710 | } |
711 | ||
712 | if (gpe_block->next) { | |
713 | gpe_block->next->previous = gpe_block->previous; | |
714 | } | |
4be44fcd | 715 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
716 | } |
717 | ||
718 | /* Free the gpe_block */ | |
719 | ||
8313524a BM |
720 | ACPI_FREE(gpe_block->register_info); |
721 | ACPI_FREE(gpe_block->event_info); | |
722 | ACPI_FREE(gpe_block); | |
1da177e4 | 723 | |
4be44fcd LB |
724 | unlock_and_exit: |
725 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
726 | return_ACPI_STATUS(status); | |
1da177e4 LT |
727 | } |
728 | ||
1da177e4 LT |
729 | /******************************************************************************* |
730 | * | |
731 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
732 | * | |
733 | * PARAMETERS: gpe_block - New GPE block | |
734 | * | |
735 | * RETURN: Status | |
736 | * | |
737 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
738 | * | |
739 | ******************************************************************************/ | |
740 | ||
741 | static acpi_status | |
4be44fcd | 742 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 743 | { |
4be44fcd LB |
744 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
745 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
746 | struct acpi_gpe_event_info *this_event; | |
747 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
748 | u32 i; |
749 | u32 j; | |
4be44fcd | 750 | acpi_status status; |
1da177e4 | 751 | |
b229cf92 | 752 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
753 | |
754 | /* Allocate the GPE register information block */ | |
755 | ||
8313524a BM |
756 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
757 | register_count * | |
758 | sizeof(struct | |
759 | acpi_gpe_register_info)); | |
1da177e4 | 760 | if (!gpe_register_info) { |
b8e4d893 | 761 | ACPI_ERROR((AE_INFO, |
b229cf92 | 762 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 763 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
764 | } |
765 | ||
766 | /* | |
767 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 768 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 769 | */ |
8313524a BM |
770 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
771 | register_count * | |
772 | ACPI_GPE_REGISTER_WIDTH) * | |
773 | sizeof(struct | |
774 | acpi_gpe_event_info)); | |
1da177e4 | 775 | if (!gpe_event_info) { |
b8e4d893 | 776 | ACPI_ERROR((AE_INFO, |
b229cf92 | 777 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
778 | status = AE_NO_MEMORY; |
779 | goto error_exit; | |
780 | } | |
781 | ||
782 | /* Save the new Info arrays in the GPE block */ | |
783 | ||
784 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 785 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
786 | |
787 | /* | |
96db255c | 788 | * Initialize the GPE Register and Event structures. A goal of these |
1da177e4 | 789 | * tables is to hide the fact that there are two separate GPE register sets |
96db255c | 790 | * in a given GPE hardware block, the status registers occupy the first half, |
1da177e4 LT |
791 | * and the enable registers occupy the second half. |
792 | */ | |
793 | this_register = gpe_register_info; | |
4be44fcd | 794 | this_event = gpe_event_info; |
1da177e4 LT |
795 | |
796 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 797 | |
1da177e4 LT |
798 | /* Init the register_info for this GPE register (8 GPEs) */ |
799 | ||
4be44fcd LB |
800 | this_register->base_gpe_number = |
801 | (u8) (gpe_block->block_base_number + | |
802 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
803 | ||
59fa8505 BM |
804 | this_register->status_address.address = |
805 | gpe_block->block_address.address + i; | |
4be44fcd | 806 | |
59fa8505 BM |
807 | this_register->enable_address.address = |
808 | gpe_block->block_address.address + i + | |
809 | gpe_block->register_count; | |
4be44fcd | 810 | |
f3d2e786 BM |
811 | this_register->status_address.space_id = |
812 | gpe_block->block_address.space_id; | |
813 | this_register->enable_address.space_id = | |
814 | gpe_block->block_address.space_id; | |
815 | this_register->status_address.bit_width = | |
4be44fcd | 816 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 817 | this_register->enable_address.bit_width = |
4be44fcd | 818 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 819 | this_register->status_address.bit_offset = |
4be44fcd | 820 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 821 | this_register->enable_address.bit_offset = |
4be44fcd | 822 | ACPI_GPE_REGISTER_WIDTH; |
1da177e4 LT |
823 | |
824 | /* Init the event_info for each GPE within this register */ | |
825 | ||
826 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
69874165 AS |
827 | this_event->gpe_number = |
828 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
829 | this_event->register_info = this_register; |
830 | this_event++; | |
831 | } | |
832 | ||
96db255c BM |
833 | /* Disable all GPEs within this register */ |
834 | ||
4be44fcd LB |
835 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00, |
836 | &this_register-> | |
837 | enable_address); | |
838 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
839 | goto error_exit; |
840 | } | |
841 | ||
96db255c BM |
842 | /* Clear any pending GPE events within this register */ |
843 | ||
4be44fcd LB |
844 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF, |
845 | &this_register-> | |
846 | status_address); | |
847 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
848 | goto error_exit; |
849 | } | |
850 | ||
851 | this_register++; | |
852 | } | |
853 | ||
4be44fcd | 854 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 855 | |
4be44fcd | 856 | error_exit: |
1da177e4 | 857 | if (gpe_register_info) { |
8313524a | 858 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
859 | } |
860 | if (gpe_event_info) { | |
8313524a | 861 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
862 | } |
863 | ||
4be44fcd | 864 | return_ACPI_STATUS(status); |
1da177e4 LT |
865 | } |
866 | ||
1da177e4 LT |
867 | /******************************************************************************* |
868 | * | |
869 | * FUNCTION: acpi_ev_create_gpe_block | |
870 | * | |
871 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
872 | * gpe_block_address - Address and space_iD | |
873 | * register_count - Number of GPE register pairs in the block | |
874 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 875 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
876 | * return_gpe_block - Where the new block descriptor is returned |
877 | * | |
878 | * RETURN: Status | |
879 | * | |
96db255c BM |
880 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
881 | * the block are disabled at exit. | |
882 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
883 | * |
884 | ******************************************************************************/ | |
885 | ||
886 | acpi_status | |
4be44fcd LB |
887 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
888 | struct acpi_generic_address *gpe_block_address, | |
889 | u32 register_count, | |
890 | u8 gpe_block_base_number, | |
891 | u32 interrupt_number, | |
892 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 893 | { |
4be44fcd | 894 | acpi_status status; |
96db255c | 895 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 896 | |
b229cf92 | 897 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
898 | |
899 | if (!register_count) { | |
4be44fcd | 900 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
901 | } |
902 | ||
903 | /* Allocate a new GPE block */ | |
904 | ||
8313524a | 905 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 906 | if (!gpe_block) { |
4be44fcd | 907 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
908 | } |
909 | ||
910 | /* Initialize the new GPE block */ | |
911 | ||
96db255c | 912 | gpe_block->node = gpe_device; |
1da177e4 LT |
913 | gpe_block->register_count = register_count; |
914 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 915 | |
4be44fcd LB |
916 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
917 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 918 | |
96db255c BM |
919 | /* |
920 | * Create the register_info and event_info sub-structures | |
921 | * Note: disables and clears all GPEs in the block | |
922 | */ | |
4be44fcd LB |
923 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
924 | if (ACPI_FAILURE(status)) { | |
8313524a | 925 | ACPI_FREE(gpe_block); |
4be44fcd | 926 | return_ACPI_STATUS(status); |
1da177e4 LT |
927 | } |
928 | ||
96db255c | 929 | /* Install the new block in the global lists */ |
1da177e4 | 930 | |
4be44fcd LB |
931 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
932 | if (ACPI_FAILURE(status)) { | |
8313524a | 933 | ACPI_FREE(gpe_block); |
4be44fcd | 934 | return_ACPI_STATUS(status); |
1da177e4 LT |
935 | } |
936 | ||
937 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
938 | ||
4be44fcd LB |
939 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
940 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
941 | acpi_ev_save_method_info, gpe_block, | |
942 | NULL); | |
1da177e4 | 943 | |
96db255c BM |
944 | /* Return the new block */ |
945 | ||
946 | if (return_gpe_block) { | |
947 | (*return_gpe_block) = gpe_block; | |
948 | } | |
949 | ||
950 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
951 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
952 | (u32) gpe_block->block_base_number, | |
953 | (u32) (gpe_block->block_base_number + | |
954 | ((gpe_block->register_count * | |
955 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
956 | gpe_device->name.ascii, gpe_block->register_count, | |
957 | interrupt_number)); | |
958 | ||
959 | return_ACPI_STATUS(AE_OK); | |
960 | } | |
961 | ||
962 | /******************************************************************************* | |
963 | * | |
964 | * FUNCTION: acpi_ev_initialize_gpe_block | |
965 | * | |
966 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
967 | * gpe_block - Gpe Block info | |
968 | * | |
969 | * RETURN: Status | |
970 | * | |
971 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
972 | * _PRT methods associated with the block, then enable the | |
973 | * appropriate GPEs. | |
974 | * Note: Assumes namespace is locked. | |
975 | * | |
976 | ******************************************************************************/ | |
977 | ||
978 | acpi_status | |
979 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
980 | struct acpi_gpe_block_info *gpe_block) | |
981 | { | |
982 | acpi_status status; | |
983 | struct acpi_gpe_event_info *gpe_event_info; | |
984 | struct acpi_gpe_walk_info gpe_info; | |
985 | u32 wake_gpe_count; | |
986 | u32 gpe_enabled_count; | |
67a119f9 BM |
987 | u32 i; |
988 | u32 j; | |
96db255c | 989 | |
b229cf92 | 990 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
991 | |
992 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
993 | ||
994 | if (!gpe_block) { | |
995 | return_ACPI_STATUS(AE_OK); | |
996 | } | |
997 | ||
1da177e4 | 998 | /* |
96db255c BM |
999 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
1000 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
1001 | */ |
1002 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
1003 | /* | |
96db255c BM |
1004 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
1005 | * Each GPE that has one or more _PRWs that reference it is by | |
1006 | * definition a wake GPE and will not be enabled while the machine | |
1007 | * is running. | |
1da177e4 LT |
1008 | */ |
1009 | gpe_info.gpe_block = gpe_block; | |
1010 | gpe_info.gpe_device = gpe_device; | |
1011 | ||
4be44fcd LB |
1012 | status = |
1013 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
1014 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
1015 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1016 | NULL); | |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | /* | |
96db255c BM |
1020 | * Enable all GPEs in this block that have these attributes: |
1021 | * 1) are "runtime" or "run/wake" GPEs, and | |
1022 | * 2) have a corresponding _Lxx or _Exx method | |
1023 | * | |
1024 | * Any other GPEs within this block must be enabled via the acpi_enable_gpe() | |
1025 | * external interface. | |
1da177e4 LT |
1026 | */ |
1027 | wake_gpe_count = 0; | |
1028 | gpe_enabled_count = 0; | |
1029 | ||
1030 | for (i = 0; i < gpe_block->register_count; i++) { | |
1031 | for (j = 0; j < 8; j++) { | |
52fc0b02 | 1032 | |
1da177e4 LT |
1033 | /* Get the info block for this particular GPE */ |
1034 | ||
4be44fcd LB |
1035 | gpe_event_info = |
1036 | &gpe_block-> | |
67a119f9 BM |
1037 | event_info[((acpi_size) i * |
1038 | ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 1039 | |
4be44fcd LB |
1040 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
1041 | ACPI_GPE_DISPATCH_METHOD) | |
fd350943 | 1042 | && (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { |
1da177e4 LT |
1043 | gpe_enabled_count++; |
1044 | } | |
1045 | ||
1046 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1047 | wake_gpe_count++; | |
1048 | } | |
1049 | } | |
1050 | } | |
1051 | ||
4be44fcd LB |
1052 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1053 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1054 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1055 | |
96db255c | 1056 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1057 | |
96db255c BM |
1058 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block); |
1059 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 1060 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", |
b8e4d893 | 1061 | gpe_block)); |
1da177e4 LT |
1062 | } |
1063 | ||
96db255c | 1064 | return_ACPI_STATUS(status); |
1da177e4 LT |
1065 | } |
1066 | ||
1da177e4 LT |
1067 | /******************************************************************************* |
1068 | * | |
1069 | * FUNCTION: acpi_ev_gpe_initialize | |
1070 | * | |
1071 | * PARAMETERS: None | |
1072 | * | |
1073 | * RETURN: Status | |
1074 | * | |
1075 | * DESCRIPTION: Initialize the GPE data structures | |
1076 | * | |
1077 | ******************************************************************************/ | |
1078 | ||
4be44fcd | 1079 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1080 | { |
4be44fcd LB |
1081 | u32 register_count0 = 0; |
1082 | u32 register_count1 = 0; | |
1083 | u32 gpe_number_max = 0; | |
1084 | acpi_status status; | |
1da177e4 | 1085 | |
b229cf92 | 1086 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1087 | |
4be44fcd LB |
1088 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1089 | if (ACPI_FAILURE(status)) { | |
1090 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | /* | |
1094 | * Initialize the GPE Block(s) defined in the FADT | |
1095 | * | |
1096 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1097 | * section "General-Purpose Event Registers", we have: | |
1098 | * | |
1099 | * "Each register block contains two registers of equal length | |
1100 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1101 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1102 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1103 | * half the GPE1_LEN. If a generic register block is not supported | |
1104 | * then its respective block pointer and block length values in the | |
1105 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1106 | * to be the same size." | |
1107 | */ | |
1108 | ||
1109 | /* | |
1110 | * Determine the maximum GPE number for this machine. | |
1111 | * | |
1112 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1113 | * the other. | |
1114 | * | |
1115 | * If EITHER the register length OR the block address are zero, then that | |
1116 | * particular block is not supported. | |
1117 | */ | |
f3d2e786 BM |
1118 | if (acpi_gbl_FADT.gpe0_block_length && |
1119 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1120 | |
1da177e4 LT |
1121 | /* GPE block 0 exists (has both length and address > 0) */ |
1122 | ||
f3d2e786 | 1123 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1124 | |
4be44fcd LB |
1125 | gpe_number_max = |
1126 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1127 | |
1128 | /* Install GPE Block 0 */ | |
1129 | ||
4be44fcd | 1130 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1131 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1132 | register_count0, 0, |
f3d2e786 | 1133 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1134 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1135 | |
4be44fcd | 1136 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1137 | ACPI_EXCEPTION((AE_INFO, status, |
1138 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1139 | } |
1140 | } | |
1141 | ||
f3d2e786 BM |
1142 | if (acpi_gbl_FADT.gpe1_block_length && |
1143 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1144 | |
1da177e4 LT |
1145 | /* GPE block 1 exists (has both length and address > 0) */ |
1146 | ||
f3d2e786 | 1147 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1148 | |
1149 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1150 | ||
1151 | if ((register_count0) && | |
f3d2e786 | 1152 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 BM |
1153 | ACPI_ERROR((AE_INFO, |
1154 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1155 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1156 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1157 | ((register_count1 * |
1158 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1159 | |
1160 | /* Ignore GPE1 block by setting the register count to zero */ | |
1161 | ||
1162 | register_count1 = 0; | |
4be44fcd | 1163 | } else { |
1da177e4 LT |
1164 | /* Install GPE Block 1 */ |
1165 | ||
4be44fcd LB |
1166 | status = |
1167 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1168 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1169 | register_count1, |
f3d2e786 BM |
1170 | acpi_gbl_FADT.gpe1_base, |
1171 | acpi_gbl_FADT. | |
1172 | sci_interrupt, | |
4be44fcd LB |
1173 | &acpi_gbl_gpe_fadt_blocks |
1174 | [1]); | |
1175 | ||
1176 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1177 | ACPI_EXCEPTION((AE_INFO, status, |
1178 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | /* | |
1182 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1183 | * space. However, GPE0 always starts at GPE number zero. | |
1184 | */ | |
f3d2e786 | 1185 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1186 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1187 | } |
1188 | } | |
1189 | ||
1190 | /* Exit if there are no GPE registers */ | |
1191 | ||
1192 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1193 | |
1da177e4 LT |
1194 | /* GPEs are not required by ACPI, this is OK */ |
1195 | ||
4be44fcd LB |
1196 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1197 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1198 | status = AE_OK; |
1199 | goto cleanup; | |
1200 | } | |
1201 | ||
1202 | /* Check for Max GPE number out-of-range */ | |
1203 | ||
1204 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1205 | ACPI_ERROR((AE_INFO, |
1206 | "Maximum GPE number from FADT is too large: 0x%X", | |
1207 | gpe_number_max)); | |
1da177e4 LT |
1208 | status = AE_BAD_VALUE; |
1209 | goto cleanup; | |
1210 | } | |
1211 | ||
4be44fcd LB |
1212 | cleanup: |
1213 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1214 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1215 | } |