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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
a8357b0c | 8 | * Copyright (C) 2000 - 2010, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evgpeblk") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static acpi_status |
0f849d2c | 54 | acpi_ev_match_gpe_method(acpi_handle obj_handle, |
4be44fcd | 55 | u32 level, void *obj_desc, void **return_value); |
44f6c012 RM |
56 | |
57 | static acpi_status | |
4be44fcd LB |
58 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
59 | u32 level, void *info, void **return_value); | |
44f6c012 | 60 | |
4be44fcd LB |
61 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
62 | interrupt_number); | |
44f6c012 RM |
63 | |
64 | static acpi_status | |
4be44fcd | 65 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
66 | |
67 | static acpi_status | |
4be44fcd LB |
68 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
69 | u32 interrupt_number); | |
44f6c012 RM |
70 | |
71 | static acpi_status | |
4be44fcd | 72 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
73 | |
74 | /******************************************************************************* | |
75 | * | |
76 | * FUNCTION: acpi_ev_valid_gpe_event | |
77 | * | |
78 | * PARAMETERS: gpe_event_info - Info for this GPE | |
79 | * | |
80 | * RETURN: TRUE if the gpe_event is valid | |
81 | * | |
96db255c | 82 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
83 | * Should be called only when the GPE lists are semaphore locked |
84 | * and not subject to change. | |
85 | * | |
86 | ******************************************************************************/ | |
87 | ||
4be44fcd | 88 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 89 | { |
4be44fcd LB |
90 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
91 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 92 | |
4be44fcd | 93 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
94 | |
95 | /* No need for spin lock since we are not changing any list elements */ | |
96 | ||
97 | /* Walk the GPE interrupt levels */ | |
98 | ||
99 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
100 | while (gpe_xrupt_block) { | |
101 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
102 | ||
103 | /* Walk the GPE blocks on this interrupt level */ | |
104 | ||
105 | while (gpe_block) { | |
106 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
0f849d2c | 107 | (&gpe_block->event_info[gpe_block->gpe_count] > |
4be44fcd | 108 | gpe_event_info)) { |
1da177e4 LT |
109 | return (TRUE); |
110 | } | |
111 | ||
112 | gpe_block = gpe_block->next; | |
113 | } | |
114 | ||
115 | gpe_xrupt_block = gpe_xrupt_block->next; | |
116 | } | |
117 | ||
118 | return (FALSE); | |
119 | } | |
120 | ||
1da177e4 LT |
121 | /******************************************************************************* |
122 | * | |
123 | * FUNCTION: acpi_ev_walk_gpe_list | |
124 | * | |
125 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
e97d6bf1 | 126 | * Context - Value passed to callback |
1da177e4 LT |
127 | * |
128 | * RETURN: Status | |
129 | * | |
130 | * DESCRIPTION: Walk the GPE lists. | |
131 | * | |
132 | ******************************************************************************/ | |
133 | ||
e97d6bf1 BM |
134 | acpi_status |
135 | acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) | |
1da177e4 | 136 | { |
4be44fcd LB |
137 | struct acpi_gpe_block_info *gpe_block; |
138 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
139 | acpi_status status = AE_OK; | |
b8e4d893 | 140 | acpi_cpu_flags flags; |
1da177e4 | 141 | |
b229cf92 | 142 | ACPI_FUNCTION_TRACE(ev_walk_gpe_list); |
1da177e4 | 143 | |
4be44fcd | 144 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
145 | |
146 | /* Walk the interrupt level descriptor list */ | |
147 | ||
148 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
149 | while (gpe_xrupt_info) { | |
52fc0b02 | 150 | |
1da177e4 LT |
151 | /* Walk all Gpe Blocks attached to this interrupt level */ |
152 | ||
153 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
154 | while (gpe_block) { | |
52fc0b02 | 155 | |
1da177e4 LT |
156 | /* One callback per GPE block */ |
157 | ||
e97d6bf1 BM |
158 | status = |
159 | gpe_walk_callback(gpe_xrupt_info, gpe_block, | |
160 | context); | |
4be44fcd | 161 | if (ACPI_FAILURE(status)) { |
e97d6bf1 BM |
162 | if (status == AE_CTRL_END) { /* Callback abort */ |
163 | status = AE_OK; | |
164 | } | |
1da177e4 LT |
165 | goto unlock_and_exit; |
166 | } | |
167 | ||
168 | gpe_block = gpe_block->next; | |
169 | } | |
170 | ||
171 | gpe_xrupt_info = gpe_xrupt_info->next; | |
172 | } | |
173 | ||
4be44fcd LB |
174 | unlock_and_exit: |
175 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
176 | return_ACPI_STATUS(status); | |
1da177e4 LT |
177 | } |
178 | ||
44f6c012 | 179 | /******************************************************************************* |
1da177e4 LT |
180 | * |
181 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
182 | * | |
183 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
184 | * gpe_block - Gpe Block info | |
185 | * | |
186 | * RETURN: Status | |
187 | * | |
188 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
189 | * Used only prior to termination. | |
190 | * | |
191 | ******************************************************************************/ | |
192 | ||
193 | acpi_status | |
4be44fcd | 194 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
195 | struct acpi_gpe_block_info *gpe_block, |
196 | void *context) | |
1da177e4 | 197 | { |
4be44fcd | 198 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
199 | u32 i; |
200 | u32 j; | |
1da177e4 | 201 | |
b229cf92 | 202 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
203 | |
204 | /* Examine each GPE Register within the block */ | |
205 | ||
206 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 207 | |
1da177e4 LT |
208 | /* Now look at the individual GPEs in this byte register */ |
209 | ||
210 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
d4913dc6 BM |
211 | gpe_event_info = &gpe_block->event_info[((acpi_size) i * |
212 | ACPI_GPE_REGISTER_WIDTH) | |
213 | + j]; | |
1da177e4 | 214 | |
44f6c012 | 215 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 216 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 217 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 218 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
219 | gpe_event_info->flags &= |
220 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
221 | } |
222 | } | |
223 | } | |
224 | ||
4be44fcd | 225 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
226 | } |
227 | ||
1da177e4 LT |
228 | /******************************************************************************* |
229 | * | |
0f849d2c | 230 | * FUNCTION: acpi_ev_match_gpe_method |
1da177e4 LT |
231 | * |
232 | * PARAMETERS: Callback from walk_namespace | |
233 | * | |
234 | * RETURN: Status | |
235 | * | |
236 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
237 | * control method under the _GPE portion of the namespace. | |
238 | * Extract the name and GPE type from the object, saving this | |
239 | * information for quick lookup during GPE dispatch | |
240 | * | |
241 | * The name of each GPE control method is of the form: | |
0f849d2c | 242 | * "_Lxx" or "_Exx", where: |
1da177e4 LT |
243 | * L - means that the GPE is level triggered |
244 | * E - means that the GPE is edge triggered | |
245 | * xx - is the GPE number [in HEX] | |
246 | * | |
247 | ******************************************************************************/ | |
248 | ||
249 | static acpi_status | |
0f849d2c | 250 | acpi_ev_match_gpe_method(acpi_handle obj_handle, |
4be44fcd | 251 | u32 level, void *obj_desc, void **return_value) |
1da177e4 | 252 | { |
0f849d2c LM |
253 | struct acpi_namespace_node *method_node = |
254 | ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); | |
4be44fcd LB |
255 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
256 | struct acpi_gpe_event_info *gpe_event_info; | |
257 | u32 gpe_number; | |
258 | char name[ACPI_NAME_SIZE + 1]; | |
259 | u8 type; | |
1da177e4 | 260 | |
b229cf92 | 261 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
262 | |
263 | /* | |
0f849d2c | 264 | * Match and decode the _Lxx and _Exx GPE method names |
1da177e4 | 265 | * |
0f849d2c | 266 | * 1) Extract the method name and null terminate it |
1da177e4 | 267 | */ |
0f849d2c | 268 | ACPI_MOVE_32_TO_32(name, &method_node->name.integer); |
1da177e4 LT |
269 | name[ACPI_NAME_SIZE] = 0; |
270 | ||
0f849d2c LM |
271 | /* 2) Name must begin with an underscore */ |
272 | ||
273 | if (name[0] != '_') { | |
274 | return_ACPI_STATUS(AE_OK); /* Ignore this method */ | |
275 | } | |
276 | ||
1da177e4 | 277 | /* |
0f849d2c | 278 | * 3) Edge/Level determination is based on the 2nd character |
1da177e4 LT |
279 | * of the method name |
280 | * | |
0f849d2c LM |
281 | * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is |
282 | * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set. | |
1da177e4 LT |
283 | */ |
284 | switch (name[1]) { | |
285 | case 'L': | |
286 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
287 | break; | |
288 | ||
289 | case 'E': | |
290 | type = ACPI_GPE_EDGE_TRIGGERED; | |
291 | break; | |
292 | ||
293 | default: | |
0f849d2c | 294 | /* Unknown method type, just ignore it */ |
1da177e4 | 295 | |
b229cf92 | 296 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
297 | "Ignoring unknown GPE method type: %s " |
298 | "(name not of form _Lxx or _Exx)", name)); | |
4be44fcd | 299 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
300 | } |
301 | ||
0f849d2c | 302 | /* 4) The last two characters of the name are the hex GPE Number */ |
1da177e4 | 303 | |
4be44fcd | 304 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 305 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 306 | |
1da177e4 LT |
307 | /* Conversion failed; invalid method, just ignore it */ |
308 | ||
b229cf92 | 309 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
310 | "Could not extract GPE number from name: %s " |
311 | "(name is not of form _Lxx or _Exx)", name)); | |
4be44fcd | 312 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
313 | } |
314 | ||
315 | /* Ensure that we have a valid GPE number for this GPE block */ | |
316 | ||
0f849d2c LM |
317 | gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block); |
318 | if (!gpe_event_info) { | |
1da177e4 | 319 | /* |
0f849d2c LM |
320 | * This gpe_number is not valid for this GPE block, just ignore it. |
321 | * However, it may be valid for a different GPE block, since GPE0 | |
322 | * and GPE1 methods both appear under \_GPE. | |
1da177e4 | 323 | */ |
4be44fcd | 324 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
325 | } |
326 | ||
327 | /* | |
0f849d2c LM |
328 | * Add the GPE information from above to the gpe_event_info block for |
329 | * use during dispatch of this GPE. | |
1da177e4 | 330 | */ |
0f849d2c LM |
331 | gpe_event_info->flags = (u8)(type | ACPI_GPE_DISPATCH_METHOD); |
332 | gpe_event_info->dispatch.method_node = method_node; | |
1da177e4 | 333 | |
4be44fcd LB |
334 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
335 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
336 | name, gpe_number)); | |
9630bdd9 | 337 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
338 | } |
339 | ||
1da177e4 LT |
340 | /******************************************************************************* |
341 | * | |
342 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
343 | * | |
344 | * PARAMETERS: Callback from walk_namespace | |
345 | * | |
96db255c | 346 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
347 | * not aborted on a single _PRW failure. |
348 | * | |
349 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 350 | * Device. Run the _PRW method. If present, extract the GPE |
0f849d2c | 351 | * number and mark the GPE as a CAN_WAKE GPE. |
1da177e4 LT |
352 | * |
353 | ******************************************************************************/ | |
354 | ||
355 | static acpi_status | |
4be44fcd LB |
356 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
357 | u32 level, void *info, void **return_value) | |
1da177e4 | 358 | { |
4be44fcd LB |
359 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
360 | struct acpi_namespace_node *gpe_device; | |
361 | struct acpi_gpe_block_info *gpe_block; | |
362 | struct acpi_namespace_node *target_gpe_device; | |
363 | struct acpi_gpe_event_info *gpe_event_info; | |
364 | union acpi_operand_object *pkg_desc; | |
365 | union acpi_operand_object *obj_desc; | |
366 | u32 gpe_number; | |
367 | acpi_status status; | |
368 | ||
b229cf92 | 369 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
370 | |
371 | /* Check for a _PRW method under this device */ | |
372 | ||
4be44fcd LB |
373 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
374 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
375 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 376 | |
0f849d2c | 377 | /* Ignore all errors from _PRW, we don't want to abort the walk */ |
1da177e4 | 378 | |
4be44fcd | 379 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
380 | } |
381 | ||
382 | /* The returned _PRW package must have at least two elements */ | |
383 | ||
384 | if (pkg_desc->package.count < 2) { | |
385 | goto cleanup; | |
386 | } | |
387 | ||
388 | /* Extract pointers from the input context */ | |
389 | ||
390 | gpe_device = gpe_info->gpe_device; | |
391 | gpe_block = gpe_info->gpe_block; | |
392 | ||
393 | /* | |
9f15fc66 BM |
394 | * The _PRW object must return a package, we are only interested in the |
395 | * first element | |
1da177e4 LT |
396 | */ |
397 | obj_desc = pkg_desc->package.elements[0]; | |
398 | ||
3371c19c | 399 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { |
52fc0b02 | 400 | |
1da177e4 LT |
401 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
402 | ||
403 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
404 | ||
405 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
406 | ||
407 | gpe_number = (u32) obj_desc->integer.value; | |
3371c19c | 408 | } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 409 | |
1da177e4 LT |
410 | /* Package contains a GPE reference and GPE number within a GPE block */ |
411 | ||
412 | if ((obj_desc->package.count < 2) || | |
3371c19c | 413 | ((obj_desc->package.elements[0])->common.type != |
d4913dc6 BM |
414 | ACPI_TYPE_LOCAL_REFERENCE) || |
415 | ((obj_desc->package.elements[1])->common.type != | |
416 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
417 | goto cleanup; |
418 | } | |
419 | ||
420 | /* Get GPE block reference and decode */ | |
421 | ||
4be44fcd LB |
422 | target_gpe_device = |
423 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 424 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 425 | } else { |
1da177e4 LT |
426 | /* Unknown type, just ignore it */ |
427 | ||
428 | goto cleanup; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Is this GPE within this block? | |
433 | * | |
9f15fc66 | 434 | * TRUE if and only if these conditions are true: |
1da177e4 LT |
435 | * 1) The GPE devices match. |
436 | * 2) The GPE index(number) is within the range of the Gpe Block | |
437 | * associated with the GPE device. | |
438 | */ | |
0f849d2c LM |
439 | if (gpe_device != target_gpe_device) { |
440 | goto cleanup; | |
441 | } | |
442 | ||
443 | gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block); | |
444 | if (gpe_event_info) { | |
445 | /* This GPE can wake the system */ | |
1da177e4 | 446 | |
9630bdd9 | 447 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
1da177e4 LT |
448 | } |
449 | ||
4be44fcd LB |
450 | cleanup: |
451 | acpi_ut_remove_reference(pkg_desc); | |
452 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
453 | } |
454 | ||
1da177e4 LT |
455 | /******************************************************************************* |
456 | * | |
457 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
458 | * | |
6f42ccf2 | 459 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
460 | * |
461 | * RETURN: A GPE interrupt block | |
462 | * | |
96db255c | 463 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
9f15fc66 BM |
464 | * block per unique interrupt level used for GPEs. Should be |
465 | * called only when the GPE lists are semaphore locked and not | |
466 | * subject to change. | |
1da177e4 LT |
467 | * |
468 | ******************************************************************************/ | |
469 | ||
4be44fcd LB |
470 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
471 | interrupt_number) | |
1da177e4 | 472 | { |
4be44fcd LB |
473 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
474 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
475 | acpi_status status; | |
b8e4d893 | 476 | acpi_cpu_flags flags; |
1da177e4 | 477 | |
b229cf92 | 478 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 479 | |
44f6c012 | 480 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
481 | |
482 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
483 | while (next_gpe_xrupt) { | |
6f42ccf2 | 484 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 485 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
486 | } |
487 | ||
488 | next_gpe_xrupt = next_gpe_xrupt->next; | |
489 | } | |
490 | ||
491 | /* Not found, must allocate a new xrupt descriptor */ | |
492 | ||
8313524a | 493 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 494 | if (!gpe_xrupt) { |
4be44fcd | 495 | return_PTR(NULL); |
1da177e4 LT |
496 | } |
497 | ||
6f42ccf2 | 498 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
499 | |
500 | /* Install new interrupt descriptor with spin lock */ | |
501 | ||
4be44fcd | 502 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
503 | if (acpi_gbl_gpe_xrupt_list_head) { |
504 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
505 | while (next_gpe_xrupt->next) { | |
506 | next_gpe_xrupt = next_gpe_xrupt->next; | |
507 | } | |
508 | ||
509 | next_gpe_xrupt->next = gpe_xrupt; | |
510 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 511 | } else { |
1da177e4 LT |
512 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
513 | } | |
4be44fcd | 514 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
515 | |
516 | /* Install new interrupt handler if not SCI_INT */ | |
517 | ||
f3d2e786 | 518 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
519 | status = acpi_os_install_interrupt_handler(interrupt_number, |
520 | acpi_ev_gpe_xrupt_handler, | |
521 | gpe_xrupt); | |
522 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
523 | ACPI_ERROR((AE_INFO, |
524 | "Could not install GPE interrupt handler at level 0x%X", | |
525 | interrupt_number)); | |
4be44fcd | 526 | return_PTR(NULL); |
1da177e4 LT |
527 | } |
528 | } | |
529 | ||
4be44fcd | 530 | return_PTR(gpe_xrupt); |
1da177e4 LT |
531 | } |
532 | ||
1da177e4 LT |
533 | /******************************************************************************* |
534 | * | |
535 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
536 | * | |
537 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
538 | * | |
539 | * RETURN: Status | |
540 | * | |
541 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
542 | * interrupt handler if not the SCI interrupt. | |
543 | * | |
544 | ******************************************************************************/ | |
545 | ||
546 | static acpi_status | |
4be44fcd | 547 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 548 | { |
4be44fcd | 549 | acpi_status status; |
b8e4d893 | 550 | acpi_cpu_flags flags; |
1da177e4 | 551 | |
b229cf92 | 552 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
553 | |
554 | /* We never want to remove the SCI interrupt handler */ | |
555 | ||
f3d2e786 | 556 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 557 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 558 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
559 | } |
560 | ||
561 | /* Disable this interrupt */ | |
562 | ||
96db255c BM |
563 | status = |
564 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
565 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
566 | if (ACPI_FAILURE(status)) { |
567 | return_ACPI_STATUS(status); | |
1da177e4 LT |
568 | } |
569 | ||
570 | /* Unlink the interrupt block with lock */ | |
571 | ||
4be44fcd | 572 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
573 | if (gpe_xrupt->previous) { |
574 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
575 | } else { |
576 | /* No previous, update list head */ | |
577 | ||
578 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
579 | } |
580 | ||
581 | if (gpe_xrupt->next) { | |
582 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
583 | } | |
4be44fcd | 584 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
585 | |
586 | /* Free the block */ | |
587 | ||
8313524a | 588 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 589 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
590 | } |
591 | ||
1da177e4 LT |
592 | /******************************************************************************* |
593 | * | |
594 | * FUNCTION: acpi_ev_install_gpe_block | |
595 | * | |
9f15fc66 BM |
596 | * PARAMETERS: gpe_block - New GPE block |
597 | * interrupt_number - Xrupt to be associated with this | |
598 | * GPE block | |
1da177e4 LT |
599 | * |
600 | * RETURN: Status | |
601 | * | |
602 | * DESCRIPTION: Install new GPE block with mutex support | |
603 | * | |
604 | ******************************************************************************/ | |
605 | ||
606 | static acpi_status | |
4be44fcd LB |
607 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
608 | u32 interrupt_number) | |
1da177e4 | 609 | { |
4be44fcd LB |
610 | struct acpi_gpe_block_info *next_gpe_block; |
611 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
612 | acpi_status status; | |
b8e4d893 | 613 | acpi_cpu_flags flags; |
1da177e4 | 614 | |
b229cf92 | 615 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 616 | |
4be44fcd LB |
617 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
618 | if (ACPI_FAILURE(status)) { | |
619 | return_ACPI_STATUS(status); | |
1da177e4 LT |
620 | } |
621 | ||
4be44fcd | 622 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
623 | if (!gpe_xrupt_block) { |
624 | status = AE_NO_MEMORY; | |
625 | goto unlock_and_exit; | |
626 | } | |
627 | ||
44f6c012 | 628 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 629 | |
4be44fcd | 630 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
631 | if (gpe_xrupt_block->gpe_block_list_head) { |
632 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
633 | while (next_gpe_block->next) { | |
634 | next_gpe_block = next_gpe_block->next; | |
635 | } | |
636 | ||
637 | next_gpe_block->next = gpe_block; | |
638 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 639 | } else { |
1da177e4 LT |
640 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
641 | } | |
642 | ||
643 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 644 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 645 | |
4be44fcd LB |
646 | unlock_and_exit: |
647 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
648 | return_ACPI_STATUS(status); | |
1da177e4 LT |
649 | } |
650 | ||
1da177e4 LT |
651 | /******************************************************************************* |
652 | * | |
653 | * FUNCTION: acpi_ev_delete_gpe_block | |
654 | * | |
9f15fc66 | 655 | * PARAMETERS: gpe_block - Existing GPE block |
1da177e4 LT |
656 | * |
657 | * RETURN: Status | |
658 | * | |
659 | * DESCRIPTION: Remove a GPE block | |
660 | * | |
661 | ******************************************************************************/ | |
662 | ||
4be44fcd | 663 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 664 | { |
4be44fcd | 665 | acpi_status status; |
b8e4d893 | 666 | acpi_cpu_flags flags; |
1da177e4 | 667 | |
b229cf92 | 668 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 669 | |
4be44fcd LB |
670 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
671 | if (ACPI_FAILURE(status)) { | |
672 | return_ACPI_STATUS(status); | |
1da177e4 LT |
673 | } |
674 | ||
675 | /* Disable all GPEs in this block */ | |
676 | ||
e97d6bf1 BM |
677 | status = |
678 | acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); | |
1da177e4 LT |
679 | |
680 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 681 | |
1da177e4 LT |
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 | ||
0f849d2c | 705 | acpi_current_gpe_count -= gpe_block->gpe_count; |
e97d6bf1 | 706 | |
1da177e4 LT |
707 | /* Free the gpe_block */ |
708 | ||
8313524a BM |
709 | ACPI_FREE(gpe_block->register_info); |
710 | ACPI_FREE(gpe_block->event_info); | |
711 | ACPI_FREE(gpe_block); | |
1da177e4 | 712 | |
4be44fcd LB |
713 | unlock_and_exit: |
714 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
715 | return_ACPI_STATUS(status); | |
1da177e4 LT |
716 | } |
717 | ||
1da177e4 LT |
718 | /******************************************************************************* |
719 | * | |
720 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
721 | * | |
722 | * PARAMETERS: gpe_block - New GPE block | |
723 | * | |
724 | * RETURN: Status | |
725 | * | |
726 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
727 | * | |
728 | ******************************************************************************/ | |
729 | ||
730 | static acpi_status | |
4be44fcd | 731 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 732 | { |
4be44fcd LB |
733 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
734 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
735 | struct acpi_gpe_event_info *this_event; | |
736 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
737 | u32 i; |
738 | u32 j; | |
4be44fcd | 739 | acpi_status status; |
1da177e4 | 740 | |
b229cf92 | 741 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
742 | |
743 | /* Allocate the GPE register information block */ | |
744 | ||
8313524a BM |
745 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
746 | register_count * | |
747 | sizeof(struct | |
748 | acpi_gpe_register_info)); | |
1da177e4 | 749 | if (!gpe_register_info) { |
b8e4d893 | 750 | ACPI_ERROR((AE_INFO, |
b229cf92 | 751 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 752 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
753 | } |
754 | ||
755 | /* | |
756 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 757 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 758 | */ |
0f849d2c | 759 | gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->gpe_count * |
8313524a BM |
760 | sizeof(struct |
761 | acpi_gpe_event_info)); | |
1da177e4 | 762 | if (!gpe_event_info) { |
b8e4d893 | 763 | ACPI_ERROR((AE_INFO, |
b229cf92 | 764 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
765 | status = AE_NO_MEMORY; |
766 | goto error_exit; | |
767 | } | |
768 | ||
769 | /* Save the new Info arrays in the GPE block */ | |
770 | ||
771 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 772 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
773 | |
774 | /* | |
96db255c | 775 | * Initialize the GPE Register and Event structures. A goal of these |
9f15fc66 BM |
776 | * tables is to hide the fact that there are two separate GPE register |
777 | * sets in a given GPE hardware block, the status registers occupy the | |
778 | * first half, and the enable registers occupy the second half. | |
1da177e4 LT |
779 | */ |
780 | this_register = gpe_register_info; | |
4be44fcd | 781 | this_event = gpe_event_info; |
1da177e4 LT |
782 | |
783 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 784 | |
1da177e4 LT |
785 | /* Init the register_info for this GPE register (8 GPEs) */ |
786 | ||
4be44fcd LB |
787 | this_register->base_gpe_number = |
788 | (u8) (gpe_block->block_base_number + | |
789 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
790 | ||
59fa8505 BM |
791 | this_register->status_address.address = |
792 | gpe_block->block_address.address + i; | |
4be44fcd | 793 | |
59fa8505 BM |
794 | this_register->enable_address.address = |
795 | gpe_block->block_address.address + i + | |
796 | gpe_block->register_count; | |
4be44fcd | 797 | |
f3d2e786 BM |
798 | this_register->status_address.space_id = |
799 | gpe_block->block_address.space_id; | |
800 | this_register->enable_address.space_id = | |
801 | gpe_block->block_address.space_id; | |
802 | this_register->status_address.bit_width = | |
4be44fcd | 803 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 804 | this_register->enable_address.bit_width = |
4be44fcd | 805 | ACPI_GPE_REGISTER_WIDTH; |
ecfbbc7b BM |
806 | this_register->status_address.bit_offset = 0; |
807 | this_register->enable_address.bit_offset = 0; | |
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++) { | |
69874165 AS |
812 | this_event->gpe_number = |
813 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
814 | this_event->register_info = this_register; |
815 | this_event++; | |
816 | } | |
817 | ||
96db255c BM |
818 | /* Disable all GPEs within this register */ |
819 | ||
c6b5774c | 820 | status = acpi_hw_write(0x00, &this_register->enable_address); |
4be44fcd | 821 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
822 | goto error_exit; |
823 | } | |
824 | ||
96db255c BM |
825 | /* Clear any pending GPE events within this register */ |
826 | ||
c6b5774c | 827 | status = acpi_hw_write(0xFF, &this_register->status_address); |
4be44fcd | 828 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
829 | goto error_exit; |
830 | } | |
831 | ||
832 | this_register++; | |
833 | } | |
834 | ||
4be44fcd | 835 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 836 | |
4be44fcd | 837 | error_exit: |
1da177e4 | 838 | if (gpe_register_info) { |
8313524a | 839 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
840 | } |
841 | if (gpe_event_info) { | |
8313524a | 842 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
843 | } |
844 | ||
4be44fcd | 845 | return_ACPI_STATUS(status); |
1da177e4 LT |
846 | } |
847 | ||
1da177e4 LT |
848 | /******************************************************************************* |
849 | * | |
850 | * FUNCTION: acpi_ev_create_gpe_block | |
851 | * | |
852 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
853 | * gpe_block_address - Address and space_iD | |
854 | * register_count - Number of GPE register pairs in the block | |
855 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 856 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
857 | * return_gpe_block - Where the new block descriptor is returned |
858 | * | |
859 | * RETURN: Status | |
860 | * | |
96db255c BM |
861 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
862 | * the block are disabled at exit. | |
863 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
864 | * |
865 | ******************************************************************************/ | |
866 | ||
867 | acpi_status | |
4be44fcd LB |
868 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
869 | struct acpi_generic_address *gpe_block_address, | |
870 | u32 register_count, | |
871 | u8 gpe_block_base_number, | |
872 | u32 interrupt_number, | |
873 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 874 | { |
4be44fcd | 875 | acpi_status status; |
96db255c | 876 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 877 | |
b229cf92 | 878 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
879 | |
880 | if (!register_count) { | |
4be44fcd | 881 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
882 | } |
883 | ||
884 | /* Allocate a new GPE block */ | |
885 | ||
8313524a | 886 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 887 | if (!gpe_block) { |
4be44fcd | 888 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
889 | } |
890 | ||
891 | /* Initialize the new GPE block */ | |
892 | ||
96db255c | 893 | gpe_block->node = gpe_device; |
0f849d2c | 894 | gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH); |
1da177e4 LT |
895 | gpe_block->register_count = register_count; |
896 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 897 | |
4be44fcd LB |
898 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
899 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 900 | |
96db255c BM |
901 | /* |
902 | * Create the register_info and event_info sub-structures | |
903 | * Note: disables and clears all GPEs in the block | |
904 | */ | |
4be44fcd LB |
905 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
906 | if (ACPI_FAILURE(status)) { | |
8313524a | 907 | ACPI_FREE(gpe_block); |
4be44fcd | 908 | return_ACPI_STATUS(status); |
1da177e4 LT |
909 | } |
910 | ||
96db255c | 911 | /* Install the new block in the global lists */ |
1da177e4 | 912 | |
4be44fcd LB |
913 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
914 | if (ACPI_FAILURE(status)) { | |
8313524a | 915 | ACPI_FREE(gpe_block); |
4be44fcd | 916 | return_ACPI_STATUS(status); |
1da177e4 LT |
917 | } |
918 | ||
919 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
920 | ||
4be44fcd LB |
921 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
922 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
0f849d2c | 923 | acpi_ev_match_gpe_method, NULL, |
2263576c | 924 | gpe_block, NULL); |
1da177e4 | 925 | |
96db255c BM |
926 | /* Return the new block */ |
927 | ||
928 | if (return_gpe_block) { | |
929 | (*return_gpe_block) = gpe_block; | |
930 | } | |
931 | ||
932 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
933 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
934 | (u32) gpe_block->block_base_number, | |
935 | (u32) (gpe_block->block_base_number + | |
0f849d2c | 936 | (gpe_block->gpe_count - 1)), |
96db255c BM |
937 | gpe_device->name.ascii, gpe_block->register_count, |
938 | interrupt_number)); | |
939 | ||
e97d6bf1 BM |
940 | /* Update global count of currently available GPEs */ |
941 | ||
0f849d2c | 942 | acpi_current_gpe_count += gpe_block->gpe_count; |
96db255c BM |
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 | { | |
0f849d2c | 966 | acpi_status status; |
96db255c BM |
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; | |
0f849d2c LM |
971 | u32 gpe_index; |
972 | u32 gpe_number; | |
67a119f9 BM |
973 | u32 i; |
974 | u32 j; | |
96db255c | 975 | |
b229cf92 | 976 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
977 | |
978 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
979 | ||
980 | if (!gpe_block) { | |
981 | return_ACPI_STATUS(AE_OK); | |
982 | } | |
983 | ||
1da177e4 | 984 | /* |
96db255c BM |
985 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
986 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
987 | */ |
988 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
989 | /* | |
96db255c BM |
990 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
991 | * Each GPE that has one or more _PRWs that reference it is by | |
992 | * definition a wake GPE and will not be enabled while the machine | |
993 | * is running. | |
1da177e4 LT |
994 | */ |
995 | gpe_info.gpe_block = gpe_block; | |
996 | gpe_info.gpe_device = gpe_device; | |
997 | ||
0f849d2c | 998 | status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
4be44fcd | 999 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
2263576c LM |
1000 | acpi_ev_match_prw_and_gpe, NULL, |
1001 | &gpe_info, NULL); | |
0f849d2c LM |
1002 | if (ACPI_FAILURE(status)) { |
1003 | ACPI_EXCEPTION((AE_INFO, status, | |
1004 | "While executing _PRW methods")); | |
1005 | } | |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | /* | |
0f849d2c | 1009 | * Enable all GPEs that have a corresponding method and are not |
9630bdd9 | 1010 | * capable of generating wakeups. Any other GPEs within this block |
0f849d2c | 1011 | * must be enabled via the acpi_enable_gpe interface. |
1da177e4 LT |
1012 | */ |
1013 | wake_gpe_count = 0; | |
1014 | gpe_enabled_count = 0; | |
0f849d2c LM |
1015 | |
1016 | if (gpe_device == acpi_gbl_fadt_gpe_device) { | |
9630bdd9 | 1017 | gpe_device = NULL; |
0f849d2c | 1018 | } |
1da177e4 LT |
1019 | |
1020 | for (i = 0; i < gpe_block->register_count; i++) { | |
9630bdd9 | 1021 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { |
52fc0b02 | 1022 | |
1da177e4 | 1023 | /* Get the info block for this particular GPE */ |
0f849d2c LM |
1024 | |
1025 | gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j; | |
9630bdd9 | 1026 | gpe_event_info = &gpe_block->event_info[gpe_index]; |
1da177e4 | 1027 | |
9630bdd9 | 1028 | if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { |
1da177e4 | 1029 | wake_gpe_count++; |
0f849d2c | 1030 | if (acpi_gbl_leave_wake_gpes_disabled) { |
9630bdd9 | 1031 | continue; |
0f849d2c | 1032 | } |
1da177e4 | 1033 | } |
9630bdd9 | 1034 | |
0f849d2c LM |
1035 | /* Ignore GPEs that have no corresponding _Lxx/_Exx method */ |
1036 | ||
1037 | if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) { | |
9630bdd9 | 1038 | continue; |
0f849d2c LM |
1039 | } |
1040 | ||
1041 | /* Enable this GPE */ | |
9630bdd9 RW |
1042 | |
1043 | gpe_number = gpe_index + gpe_block->block_base_number; | |
1044 | status = acpi_enable_gpe(gpe_device, gpe_number, | |
0f849d2c LM |
1045 | ACPI_GPE_TYPE_RUNTIME); |
1046 | if (ACPI_FAILURE(status)) { | |
1047 | ACPI_EXCEPTION((AE_INFO, status, | |
1048 | "Could not enable GPE 0x%02X", | |
9630bdd9 | 1049 | gpe_number)); |
0f849d2c LM |
1050 | continue; |
1051 | } | |
1052 | ||
1053 | gpe_enabled_count++; | |
1da177e4 LT |
1054 | } |
1055 | } | |
1056 | ||
4be44fcd LB |
1057 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1058 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1059 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1060 | |
9630bdd9 | 1061 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
1062 | } |
1063 | ||
1da177e4 LT |
1064 | /******************************************************************************* |
1065 | * | |
1066 | * FUNCTION: acpi_ev_gpe_initialize | |
1067 | * | |
1068 | * PARAMETERS: None | |
1069 | * | |
1070 | * RETURN: Status | |
1071 | * | |
1072 | * DESCRIPTION: Initialize the GPE data structures | |
1073 | * | |
1074 | ******************************************************************************/ | |
1075 | ||
4be44fcd | 1076 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1077 | { |
4be44fcd LB |
1078 | u32 register_count0 = 0; |
1079 | u32 register_count1 = 0; | |
1080 | u32 gpe_number_max = 0; | |
1081 | acpi_status status; | |
1da177e4 | 1082 | |
b229cf92 | 1083 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1084 | |
4be44fcd LB |
1085 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1086 | if (ACPI_FAILURE(status)) { | |
1087 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1088 | } |
1089 | ||
1090 | /* | |
1091 | * Initialize the GPE Block(s) defined in the FADT | |
1092 | * | |
d4913dc6 BM |
1093 | * Why the GPE register block lengths are divided by 2: From the ACPI |
1094 | * Spec, section "General-Purpose Event Registers", we have: | |
1da177e4 LT |
1095 | * |
1096 | * "Each register block contains two registers of equal length | |
1097 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1098 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1099 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1100 | * half the GPE1_LEN. If a generic register block is not supported | |
1101 | * then its respective block pointer and block length values in the | |
1102 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1103 | * to be the same size." | |
1104 | */ | |
1105 | ||
1106 | /* | |
1107 | * Determine the maximum GPE number for this machine. | |
1108 | * | |
1109 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1110 | * the other. | |
1111 | * | |
1112 | * If EITHER the register length OR the block address are zero, then that | |
1113 | * particular block is not supported. | |
1114 | */ | |
f3d2e786 BM |
1115 | if (acpi_gbl_FADT.gpe0_block_length && |
1116 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1117 | |
1da177e4 LT |
1118 | /* GPE block 0 exists (has both length and address > 0) */ |
1119 | ||
f3d2e786 | 1120 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1121 | |
4be44fcd LB |
1122 | gpe_number_max = |
1123 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1124 | |
1125 | /* Install GPE Block 0 */ | |
1126 | ||
4be44fcd | 1127 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1128 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1129 | register_count0, 0, |
f3d2e786 | 1130 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1131 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1132 | |
4be44fcd | 1133 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1134 | ACPI_EXCEPTION((AE_INFO, status, |
1135 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1136 | } |
1137 | } | |
1138 | ||
f3d2e786 BM |
1139 | if (acpi_gbl_FADT.gpe1_block_length && |
1140 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1141 | |
1da177e4 LT |
1142 | /* GPE block 1 exists (has both length and address > 0) */ |
1143 | ||
f3d2e786 | 1144 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1145 | |
1146 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1147 | ||
1148 | if ((register_count0) && | |
f3d2e786 | 1149 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 | 1150 | ACPI_ERROR((AE_INFO, |
f6a22b0b BM |
1151 | "GPE0 block (GPE 0 to %u) overlaps the GPE1 block " |
1152 | "(GPE %u to %u) - Ignoring GPE1", | |
f3d2e786 BM |
1153 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1154 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1155 | ((register_count1 * |
1156 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1157 | |
1158 | /* Ignore GPE1 block by setting the register count to zero */ | |
1159 | ||
1160 | register_count1 = 0; | |
4be44fcd | 1161 | } else { |
1da177e4 LT |
1162 | /* Install GPE Block 1 */ |
1163 | ||
4be44fcd LB |
1164 | status = |
1165 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1166 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1167 | register_count1, |
f3d2e786 BM |
1168 | acpi_gbl_FADT.gpe1_base, |
1169 | acpi_gbl_FADT. | |
1170 | sci_interrupt, | |
4be44fcd LB |
1171 | &acpi_gbl_gpe_fadt_blocks |
1172 | [1]); | |
1173 | ||
1174 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1175 | ACPI_EXCEPTION((AE_INFO, status, |
1176 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1177 | } |
1178 | ||
1179 | /* | |
1180 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1181 | * space. However, GPE0 always starts at GPE number zero. | |
1182 | */ | |
f3d2e786 | 1183 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1184 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1185 | } |
1186 | } | |
1187 | ||
1188 | /* Exit if there are no GPE registers */ | |
1189 | ||
1190 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1191 | |
1da177e4 LT |
1192 | /* GPEs are not required by ACPI, this is OK */ |
1193 | ||
4be44fcd LB |
1194 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1195 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1196 | status = AE_OK; |
1197 | goto cleanup; | |
1198 | } | |
1199 | ||
1200 | /* Check for Max GPE number out-of-range */ | |
1201 | ||
1202 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1203 | ACPI_ERROR((AE_INFO, |
1204 | "Maximum GPE number from FADT is too large: 0x%X", | |
1205 | gpe_number_max)); | |
1da177e4 LT |
1206 | status = AE_BAD_VALUE; |
1207 | goto cleanup; | |
1208 | } | |
1209 | ||
4be44fcd LB |
1210 | cleanup: |
1211 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1212 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1213 | } |