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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | ||
48 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 49 | ACPI_MODULE_NAME("evgpeblk") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | static acpi_status |
4be44fcd LB |
53 | acpi_ev_save_method_info(acpi_handle obj_handle, |
54 | u32 level, void *obj_desc, void **return_value); | |
44f6c012 RM |
55 | |
56 | static acpi_status | |
4be44fcd LB |
57 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
58 | u32 level, void *info, void **return_value); | |
44f6c012 | 59 | |
4be44fcd LB |
60 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
61 | interrupt_number); | |
44f6c012 RM |
62 | |
63 | static acpi_status | |
4be44fcd | 64 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
65 | |
66 | static acpi_status | |
4be44fcd LB |
67 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
68 | u32 interrupt_number); | |
44f6c012 RM |
69 | |
70 | static acpi_status | |
4be44fcd | 71 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
72 | |
73 | /******************************************************************************* | |
74 | * | |
75 | * FUNCTION: acpi_ev_valid_gpe_event | |
76 | * | |
77 | * PARAMETERS: gpe_event_info - Info for this GPE | |
78 | * | |
79 | * RETURN: TRUE if the gpe_event is valid | |
80 | * | |
96db255c | 81 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
82 | * Should be called only when the GPE lists are semaphore locked |
83 | * and not subject to change. | |
84 | * | |
85 | ******************************************************************************/ | |
86 | ||
4be44fcd | 87 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 88 | { |
4be44fcd LB |
89 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
90 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 91 | |
4be44fcd | 92 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
93 | |
94 | /* No need for spin lock since we are not changing any list elements */ | |
95 | ||
96 | /* Walk the GPE interrupt levels */ | |
97 | ||
98 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
99 | while (gpe_xrupt_block) { | |
100 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
101 | ||
102 | /* Walk the GPE blocks on this interrupt level */ | |
103 | ||
104 | while (gpe_block) { | |
105 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
4be44fcd LB |
106 | (&gpe_block-> |
107 | event_info[((acpi_size) gpe_block-> | |
108 | register_count) * 8] > | |
109 | gpe_event_info)) { | |
1da177e4 LT |
110 | return (TRUE); |
111 | } | |
112 | ||
113 | gpe_block = gpe_block->next; | |
114 | } | |
115 | ||
116 | gpe_xrupt_block = gpe_xrupt_block->next; | |
117 | } | |
118 | ||
119 | return (FALSE); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_ev_walk_gpe_list | |
125 | * | |
126 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
1da177e4 LT |
127 | * |
128 | * RETURN: Status | |
129 | * | |
130 | * DESCRIPTION: Walk the GPE lists. | |
131 | * | |
132 | ******************************************************************************/ | |
133 | ||
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 LB |
191 | struct acpi_gpe_event_info *gpe_event_info; |
192 | acpi_native_uint i; | |
193 | acpi_native_uint 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-> | |
206 | event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 207 | |
44f6c012 | 208 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 209 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 210 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 211 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
212 | gpe_event_info->flags &= |
213 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
214 | } |
215 | } | |
216 | } | |
217 | ||
4be44fcd | 218 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
219 | } |
220 | ||
1da177e4 LT |
221 | /******************************************************************************* |
222 | * | |
223 | * FUNCTION: acpi_ev_save_method_info | |
224 | * | |
225 | * PARAMETERS: Callback from walk_namespace | |
226 | * | |
227 | * RETURN: Status | |
228 | * | |
229 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
230 | * control method under the _GPE portion of the namespace. | |
231 | * Extract the name and GPE type from the object, saving this | |
232 | * information for quick lookup during GPE dispatch | |
233 | * | |
234 | * The name of each GPE control method is of the form: | |
235 | * "_Lxx" or "_Exx" | |
236 | * Where: | |
237 | * L - means that the GPE is level triggered | |
238 | * E - means that the GPE is edge triggered | |
239 | * xx - is the GPE number [in HEX] | |
240 | * | |
241 | ******************************************************************************/ | |
242 | ||
243 | static acpi_status | |
4be44fcd LB |
244 | acpi_ev_save_method_info(acpi_handle obj_handle, |
245 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 246 | { |
4be44fcd LB |
247 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
248 | struct acpi_gpe_event_info *gpe_event_info; | |
249 | u32 gpe_number; | |
250 | char name[ACPI_NAME_SIZE + 1]; | |
251 | u8 type; | |
252 | acpi_status status; | |
1da177e4 | 253 | |
b229cf92 | 254 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
255 | |
256 | /* | |
257 | * _Lxx and _Exx GPE method support | |
258 | * | |
259 | * 1) Extract the name from the object and convert to a string | |
260 | */ | |
4be44fcd LB |
261 | ACPI_MOVE_32_TO_32(name, |
262 | &((struct acpi_namespace_node *)obj_handle)->name. | |
263 | integer); | |
1da177e4 LT |
264 | name[ACPI_NAME_SIZE] = 0; |
265 | ||
266 | /* | |
267 | * 2) Edge/Level determination is based on the 2nd character | |
268 | * of the method name | |
269 | * | |
96db255c | 270 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
271 | * if a _PRW object is found that points to this GPE. |
272 | */ | |
273 | switch (name[1]) { | |
274 | case 'L': | |
275 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
276 | break; | |
277 | ||
278 | case 'E': | |
279 | type = ACPI_GPE_EDGE_TRIGGERED; | |
280 | break; | |
281 | ||
282 | default: | |
283 | /* Unknown method type, just ignore it! */ | |
284 | ||
b229cf92 BM |
285 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
286 | "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)", | |
287 | name)); | |
4be44fcd | 288 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
289 | } |
290 | ||
291 | /* Convert the last two characters of the name to the GPE Number */ | |
292 | ||
4be44fcd | 293 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 294 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 295 | |
1da177e4 LT |
296 | /* Conversion failed; invalid method, just ignore it */ |
297 | ||
b229cf92 BM |
298 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
299 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", | |
300 | name)); | |
4be44fcd | 301 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
302 | } |
303 | ||
304 | /* Ensure that we have a valid GPE number for this GPE block */ | |
305 | ||
306 | if ((gpe_number < gpe_block->block_base_number) || | |
4be44fcd LB |
307 | (gpe_number >= |
308 | (gpe_block->block_base_number + | |
309 | (gpe_block->register_count * 8)))) { | |
1da177e4 LT |
310 | /* |
311 | * Not valid for this GPE block, just ignore it | |
312 | * However, it may be valid for a different GPE block, since GPE0 and GPE1 | |
313 | * methods both appear under \_GPE. | |
314 | */ | |
4be44fcd | 315 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
316 | } |
317 | ||
318 | /* | |
319 | * Now we can add this information to the gpe_event_info block | |
96db255c | 320 | * for use during dispatch of this GPE. Default type is RUNTIME, although |
1da177e4 LT |
321 | * this may change when the _PRW methods are executed later. |
322 | */ | |
4be44fcd LB |
323 | gpe_event_info = |
324 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 325 | |
96db255c BM |
326 | gpe_event_info->flags = (u8) |
327 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 328 | |
4be44fcd LB |
329 | gpe_event_info->dispatch.method_node = |
330 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
331 | |
332 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
333 | ||
4be44fcd | 334 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 335 | |
4be44fcd LB |
336 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
337 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
338 | name, gpe_number)); | |
339 | return_ACPI_STATUS(status); | |
1da177e4 LT |
340 | } |
341 | ||
1da177e4 LT |
342 | /******************************************************************************* |
343 | * | |
344 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
345 | * | |
346 | * PARAMETERS: Callback from walk_namespace | |
347 | * | |
96db255c | 348 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
349 | * not aborted on a single _PRW failure. |
350 | * | |
351 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 352 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
353 | * number and mark the GPE as a WAKE GPE. |
354 | * | |
355 | ******************************************************************************/ | |
356 | ||
357 | static acpi_status | |
4be44fcd LB |
358 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
359 | u32 level, void *info, void **return_value) | |
1da177e4 | 360 | { |
4be44fcd LB |
361 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
362 | struct acpi_namespace_node *gpe_device; | |
363 | struct acpi_gpe_block_info *gpe_block; | |
364 | struct acpi_namespace_node *target_gpe_device; | |
365 | struct acpi_gpe_event_info *gpe_event_info; | |
366 | union acpi_operand_object *pkg_desc; | |
367 | union acpi_operand_object *obj_desc; | |
368 | u32 gpe_number; | |
369 | acpi_status status; | |
370 | ||
b229cf92 | 371 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
372 | |
373 | /* Check for a _PRW method under this device */ | |
374 | ||
4be44fcd LB |
375 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
376 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
377 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 378 | |
1da177e4 LT |
379 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
380 | ||
4be44fcd | 381 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
382 | } |
383 | ||
384 | /* The returned _PRW package must have at least two elements */ | |
385 | ||
386 | if (pkg_desc->package.count < 2) { | |
387 | goto cleanup; | |
388 | } | |
389 | ||
390 | /* Extract pointers from the input context */ | |
391 | ||
392 | gpe_device = gpe_info->gpe_device; | |
393 | gpe_block = gpe_info->gpe_block; | |
394 | ||
395 | /* | |
396 | * The _PRW object must return a package, we are only interested | |
397 | * in the first element | |
398 | */ | |
399 | obj_desc = pkg_desc->package.elements[0]; | |
400 | ||
4be44fcd | 401 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { |
52fc0b02 | 402 | |
1da177e4 LT |
403 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
404 | ||
405 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
406 | ||
407 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
408 | ||
409 | gpe_number = (u32) obj_desc->integer.value; | |
4be44fcd | 410 | } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 411 | |
1da177e4 LT |
412 | /* Package contains a GPE reference and GPE number within a GPE block */ |
413 | ||
414 | if ((obj_desc->package.count < 2) || | |
4be44fcd LB |
415 | (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != |
416 | ACPI_TYPE_LOCAL_REFERENCE) | |
417 | || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != | |
418 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
419 | goto cleanup; |
420 | } | |
421 | ||
422 | /* Get GPE block reference and decode */ | |
423 | ||
4be44fcd LB |
424 | target_gpe_device = |
425 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 426 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 427 | } else { |
1da177e4 LT |
428 | /* Unknown type, just ignore it */ |
429 | ||
430 | goto cleanup; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Is this GPE within this block? | |
435 | * | |
436 | * TRUE iff these conditions are true: | |
437 | * 1) The GPE devices match. | |
438 | * 2) The GPE index(number) is within the range of the Gpe Block | |
439 | * associated with the GPE device. | |
440 | */ | |
441 | if ((gpe_device == target_gpe_device) && | |
4be44fcd LB |
442 | (gpe_number >= gpe_block->block_base_number) && |
443 | (gpe_number < | |
444 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
445 | gpe_event_info = | |
446 | &gpe_block->event_info[gpe_number - | |
447 | gpe_block->block_base_number]; | |
1da177e4 LT |
448 | |
449 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
450 | ||
4be44fcd LB |
451 | gpe_event_info->flags &= |
452 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 453 | |
4be44fcd LB |
454 | status = |
455 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
456 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
457 | goto cleanup; |
458 | } | |
4be44fcd LB |
459 | status = |
460 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
461 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
462 | } |
463 | ||
4be44fcd LB |
464 | cleanup: |
465 | acpi_ut_remove_reference(pkg_desc); | |
466 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
467 | } |
468 | ||
1da177e4 LT |
469 | /******************************************************************************* |
470 | * | |
471 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
472 | * | |
6f42ccf2 | 473 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
474 | * |
475 | * RETURN: A GPE interrupt block | |
476 | * | |
96db255c | 477 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
1da177e4 LT |
478 | * block per unique interrupt level used for GPEs. |
479 | * Should be called only when the GPE lists are semaphore locked | |
480 | * and not subject to change. | |
481 | * | |
482 | ******************************************************************************/ | |
483 | ||
4be44fcd LB |
484 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
485 | interrupt_number) | |
1da177e4 | 486 | { |
4be44fcd LB |
487 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
488 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
489 | acpi_status status; | |
b8e4d893 | 490 | acpi_cpu_flags flags; |
1da177e4 | 491 | |
b229cf92 | 492 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 493 | |
44f6c012 | 494 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
495 | |
496 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
497 | while (next_gpe_xrupt) { | |
6f42ccf2 | 498 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 499 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
500 | } |
501 | ||
502 | next_gpe_xrupt = next_gpe_xrupt->next; | |
503 | } | |
504 | ||
505 | /* Not found, must allocate a new xrupt descriptor */ | |
506 | ||
8313524a | 507 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 508 | if (!gpe_xrupt) { |
4be44fcd | 509 | return_PTR(NULL); |
1da177e4 LT |
510 | } |
511 | ||
6f42ccf2 | 512 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
513 | |
514 | /* Install new interrupt descriptor with spin lock */ | |
515 | ||
4be44fcd | 516 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
517 | if (acpi_gbl_gpe_xrupt_list_head) { |
518 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
519 | while (next_gpe_xrupt->next) { | |
520 | next_gpe_xrupt = next_gpe_xrupt->next; | |
521 | } | |
522 | ||
523 | next_gpe_xrupt->next = gpe_xrupt; | |
524 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 525 | } else { |
1da177e4 LT |
526 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
527 | } | |
4be44fcd | 528 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
529 | |
530 | /* Install new interrupt handler if not SCI_INT */ | |
531 | ||
f3d2e786 | 532 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
533 | status = acpi_os_install_interrupt_handler(interrupt_number, |
534 | acpi_ev_gpe_xrupt_handler, | |
535 | gpe_xrupt); | |
536 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
537 | ACPI_ERROR((AE_INFO, |
538 | "Could not install GPE interrupt handler at level 0x%X", | |
539 | interrupt_number)); | |
4be44fcd | 540 | return_PTR(NULL); |
1da177e4 LT |
541 | } |
542 | } | |
543 | ||
4be44fcd | 544 | return_PTR(gpe_xrupt); |
1da177e4 LT |
545 | } |
546 | ||
1da177e4 LT |
547 | /******************************************************************************* |
548 | * | |
549 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
550 | * | |
551 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
552 | * | |
553 | * RETURN: Status | |
554 | * | |
555 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
556 | * interrupt handler if not the SCI interrupt. | |
557 | * | |
558 | ******************************************************************************/ | |
559 | ||
560 | static acpi_status | |
4be44fcd | 561 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 562 | { |
4be44fcd | 563 | acpi_status status; |
b8e4d893 | 564 | acpi_cpu_flags flags; |
1da177e4 | 565 | |
b229cf92 | 566 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
567 | |
568 | /* We never want to remove the SCI interrupt handler */ | |
569 | ||
f3d2e786 | 570 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 571 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 572 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
573 | } |
574 | ||
575 | /* Disable this interrupt */ | |
576 | ||
96db255c BM |
577 | status = |
578 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
579 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
580 | if (ACPI_FAILURE(status)) { |
581 | return_ACPI_STATUS(status); | |
1da177e4 LT |
582 | } |
583 | ||
584 | /* Unlink the interrupt block with lock */ | |
585 | ||
4be44fcd | 586 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
587 | if (gpe_xrupt->previous) { |
588 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
589 | } | |
590 | ||
591 | if (gpe_xrupt->next) { | |
592 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
593 | } | |
4be44fcd | 594 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
595 | |
596 | /* Free the block */ | |
597 | ||
8313524a | 598 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 599 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
600 | } |
601 | ||
1da177e4 LT |
602 | /******************************************************************************* |
603 | * | |
604 | * FUNCTION: acpi_ev_install_gpe_block | |
605 | * | |
606 | * PARAMETERS: gpe_block - New GPE block | |
6f42ccf2 | 607 | * interrupt_number - Xrupt to be associated with this GPE block |
1da177e4 LT |
608 | * |
609 | * RETURN: Status | |
610 | * | |
611 | * DESCRIPTION: Install new GPE block with mutex support | |
612 | * | |
613 | ******************************************************************************/ | |
614 | ||
615 | static acpi_status | |
4be44fcd LB |
616 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
617 | u32 interrupt_number) | |
1da177e4 | 618 | { |
4be44fcd LB |
619 | struct acpi_gpe_block_info *next_gpe_block; |
620 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
621 | acpi_status status; | |
b8e4d893 | 622 | acpi_cpu_flags flags; |
1da177e4 | 623 | |
b229cf92 | 624 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 625 | |
4be44fcd LB |
626 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
627 | if (ACPI_FAILURE(status)) { | |
628 | return_ACPI_STATUS(status); | |
1da177e4 LT |
629 | } |
630 | ||
4be44fcd | 631 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
632 | if (!gpe_xrupt_block) { |
633 | status = AE_NO_MEMORY; | |
634 | goto unlock_and_exit; | |
635 | } | |
636 | ||
44f6c012 | 637 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 638 | |
4be44fcd | 639 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
640 | if (gpe_xrupt_block->gpe_block_list_head) { |
641 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
642 | while (next_gpe_block->next) { | |
643 | next_gpe_block = next_gpe_block->next; | |
644 | } | |
645 | ||
646 | next_gpe_block->next = gpe_block; | |
647 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 648 | } else { |
1da177e4 LT |
649 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
650 | } | |
651 | ||
652 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 653 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 654 | |
4be44fcd LB |
655 | unlock_and_exit: |
656 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
657 | return_ACPI_STATUS(status); | |
1da177e4 LT |
658 | } |
659 | ||
1da177e4 LT |
660 | /******************************************************************************* |
661 | * | |
662 | * FUNCTION: acpi_ev_delete_gpe_block | |
663 | * | |
664 | * PARAMETERS: gpe_block - Existing GPE block | |
665 | * | |
666 | * RETURN: Status | |
667 | * | |
668 | * DESCRIPTION: Remove a GPE block | |
669 | * | |
670 | ******************************************************************************/ | |
671 | ||
4be44fcd | 672 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 673 | { |
4be44fcd | 674 | acpi_status status; |
b8e4d893 | 675 | acpi_cpu_flags flags; |
1da177e4 | 676 | |
b229cf92 | 677 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 678 | |
4be44fcd LB |
679 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
680 | if (ACPI_FAILURE(status)) { | |
681 | return_ACPI_STATUS(status); | |
1da177e4 LT |
682 | } |
683 | ||
684 | /* Disable all GPEs in this block */ | |
685 | ||
4be44fcd | 686 | status = acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block); |
1da177e4 LT |
687 | |
688 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 689 | |
1da177e4 LT |
690 | /* This is the last gpe_block on this interrupt */ |
691 | ||
4be44fcd LB |
692 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
693 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
694 | goto unlock_and_exit; |
695 | } | |
4be44fcd | 696 | } else { |
1da177e4 LT |
697 | /* Remove the block on this interrupt with lock */ |
698 | ||
4be44fcd | 699 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
700 | if (gpe_block->previous) { |
701 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
702 | } else { |
703 | gpe_block->xrupt_block->gpe_block_list_head = | |
704 | gpe_block->next; | |
1da177e4 LT |
705 | } |
706 | ||
707 | if (gpe_block->next) { | |
708 | gpe_block->next->previous = gpe_block->previous; | |
709 | } | |
4be44fcd | 710 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
711 | } |
712 | ||
713 | /* Free the gpe_block */ | |
714 | ||
8313524a BM |
715 | ACPI_FREE(gpe_block->register_info); |
716 | ACPI_FREE(gpe_block->event_info); | |
717 | ACPI_FREE(gpe_block); | |
1da177e4 | 718 | |
4be44fcd LB |
719 | unlock_and_exit: |
720 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
721 | return_ACPI_STATUS(status); | |
1da177e4 LT |
722 | } |
723 | ||
1da177e4 LT |
724 | /******************************************************************************* |
725 | * | |
726 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
727 | * | |
728 | * PARAMETERS: gpe_block - New GPE block | |
729 | * | |
730 | * RETURN: Status | |
731 | * | |
732 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
733 | * | |
734 | ******************************************************************************/ | |
735 | ||
736 | static acpi_status | |
4be44fcd | 737 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 738 | { |
4be44fcd LB |
739 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
740 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
741 | struct acpi_gpe_event_info *this_event; | |
742 | struct acpi_gpe_register_info *this_register; | |
743 | acpi_native_uint i; | |
744 | acpi_native_uint j; | |
745 | acpi_status status; | |
1da177e4 | 746 | |
b229cf92 | 747 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
748 | |
749 | /* Allocate the GPE register information block */ | |
750 | ||
8313524a BM |
751 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
752 | register_count * | |
753 | sizeof(struct | |
754 | acpi_gpe_register_info)); | |
1da177e4 | 755 | if (!gpe_register_info) { |
b8e4d893 | 756 | ACPI_ERROR((AE_INFO, |
b229cf92 | 757 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 758 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
759 | } |
760 | ||
761 | /* | |
762 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 763 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 764 | */ |
8313524a BM |
765 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
766 | register_count * | |
767 | ACPI_GPE_REGISTER_WIDTH) * | |
768 | sizeof(struct | |
769 | acpi_gpe_event_info)); | |
1da177e4 | 770 | if (!gpe_event_info) { |
b8e4d893 | 771 | ACPI_ERROR((AE_INFO, |
b229cf92 | 772 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
773 | status = AE_NO_MEMORY; |
774 | goto error_exit; | |
775 | } | |
776 | ||
777 | /* Save the new Info arrays in the GPE block */ | |
778 | ||
779 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 780 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
781 | |
782 | /* | |
96db255c | 783 | * Initialize the GPE Register and Event structures. A goal of these |
1da177e4 | 784 | * tables is to hide the fact that there are two separate GPE register sets |
96db255c | 785 | * in a given GPE hardware block, the status registers occupy the first half, |
1da177e4 LT |
786 | * and the enable registers occupy the second half. |
787 | */ | |
788 | this_register = gpe_register_info; | |
4be44fcd | 789 | this_event = gpe_event_info; |
1da177e4 LT |
790 | |
791 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 792 | |
1da177e4 LT |
793 | /* Init the register_info for this GPE register (8 GPEs) */ |
794 | ||
4be44fcd LB |
795 | this_register->base_gpe_number = |
796 | (u8) (gpe_block->block_base_number + | |
797 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
798 | ||
799 | ACPI_STORE_ADDRESS(this_register->status_address.address, | |
800 | (gpe_block->block_address.address + i)); | |
801 | ||
802 | ACPI_STORE_ADDRESS(this_register->enable_address.address, | |
803 | (gpe_block->block_address.address | |
804 | + i + gpe_block->register_count)); | |
805 | ||
f3d2e786 BM |
806 | this_register->status_address.space_id = |
807 | gpe_block->block_address.space_id; | |
808 | this_register->enable_address.space_id = | |
809 | gpe_block->block_address.space_id; | |
810 | this_register->status_address.bit_width = | |
4be44fcd | 811 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 812 | this_register->enable_address.bit_width = |
4be44fcd | 813 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 814 | this_register->status_address.bit_offset = |
4be44fcd | 815 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 816 | this_register->enable_address.bit_offset = |
4be44fcd | 817 | ACPI_GPE_REGISTER_WIDTH; |
1da177e4 LT |
818 | |
819 | /* Init the event_info for each GPE within this register */ | |
820 | ||
821 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
822 | this_event->register_bit = acpi_gbl_decode_to8bit[j]; | |
823 | this_event->register_info = this_register; | |
824 | this_event++; | |
825 | } | |
826 | ||
96db255c BM |
827 | /* Disable all GPEs within this register */ |
828 | ||
4be44fcd LB |
829 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00, |
830 | &this_register-> | |
831 | enable_address); | |
832 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
833 | goto error_exit; |
834 | } | |
835 | ||
96db255c BM |
836 | /* Clear any pending GPE events within this register */ |
837 | ||
4be44fcd LB |
838 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF, |
839 | &this_register-> | |
840 | status_address); | |
841 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
842 | goto error_exit; |
843 | } | |
844 | ||
845 | this_register++; | |
846 | } | |
847 | ||
4be44fcd | 848 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 849 | |
4be44fcd | 850 | error_exit: |
1da177e4 | 851 | if (gpe_register_info) { |
8313524a | 852 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
853 | } |
854 | if (gpe_event_info) { | |
8313524a | 855 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
856 | } |
857 | ||
4be44fcd | 858 | return_ACPI_STATUS(status); |
1da177e4 LT |
859 | } |
860 | ||
1da177e4 LT |
861 | /******************************************************************************* |
862 | * | |
863 | * FUNCTION: acpi_ev_create_gpe_block | |
864 | * | |
865 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
866 | * gpe_block_address - Address and space_iD | |
867 | * register_count - Number of GPE register pairs in the block | |
868 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 869 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
870 | * return_gpe_block - Where the new block descriptor is returned |
871 | * | |
872 | * RETURN: Status | |
873 | * | |
96db255c BM |
874 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
875 | * the block are disabled at exit. | |
876 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
877 | * |
878 | ******************************************************************************/ | |
879 | ||
880 | acpi_status | |
4be44fcd LB |
881 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
882 | struct acpi_generic_address *gpe_block_address, | |
883 | u32 register_count, | |
884 | u8 gpe_block_base_number, | |
885 | u32 interrupt_number, | |
886 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 887 | { |
4be44fcd | 888 | acpi_status status; |
96db255c | 889 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 890 | |
b229cf92 | 891 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
892 | |
893 | if (!register_count) { | |
4be44fcd | 894 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
895 | } |
896 | ||
897 | /* Allocate a new GPE block */ | |
898 | ||
8313524a | 899 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 900 | if (!gpe_block) { |
4be44fcd | 901 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
902 | } |
903 | ||
904 | /* Initialize the new GPE block */ | |
905 | ||
96db255c | 906 | gpe_block->node = gpe_device; |
1da177e4 LT |
907 | gpe_block->register_count = register_count; |
908 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 909 | |
4be44fcd LB |
910 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
911 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 912 | |
96db255c BM |
913 | /* |
914 | * Create the register_info and event_info sub-structures | |
915 | * Note: disables and clears all GPEs in the block | |
916 | */ | |
4be44fcd LB |
917 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
918 | if (ACPI_FAILURE(status)) { | |
8313524a | 919 | ACPI_FREE(gpe_block); |
4be44fcd | 920 | return_ACPI_STATUS(status); |
1da177e4 LT |
921 | } |
922 | ||
96db255c | 923 | /* Install the new block in the global lists */ |
1da177e4 | 924 | |
4be44fcd LB |
925 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
926 | if (ACPI_FAILURE(status)) { | |
8313524a | 927 | ACPI_FREE(gpe_block); |
4be44fcd | 928 | return_ACPI_STATUS(status); |
1da177e4 LT |
929 | } |
930 | ||
931 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
932 | ||
4be44fcd LB |
933 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
934 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
935 | acpi_ev_save_method_info, gpe_block, | |
936 | NULL); | |
1da177e4 | 937 | |
96db255c BM |
938 | /* Return the new block */ |
939 | ||
940 | if (return_gpe_block) { | |
941 | (*return_gpe_block) = gpe_block; | |
942 | } | |
943 | ||
944 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
945 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
946 | (u32) gpe_block->block_base_number, | |
947 | (u32) (gpe_block->block_base_number + | |
948 | ((gpe_block->register_count * | |
949 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
950 | gpe_device->name.ascii, gpe_block->register_count, | |
951 | interrupt_number)); | |
952 | ||
953 | return_ACPI_STATUS(AE_OK); | |
954 | } | |
955 | ||
956 | /******************************************************************************* | |
957 | * | |
958 | * FUNCTION: acpi_ev_initialize_gpe_block | |
959 | * | |
960 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
961 | * gpe_block - Gpe Block info | |
962 | * | |
963 | * RETURN: Status | |
964 | * | |
965 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
966 | * _PRT methods associated with the block, then enable the | |
967 | * appropriate GPEs. | |
968 | * Note: Assumes namespace is locked. | |
969 | * | |
970 | ******************************************************************************/ | |
971 | ||
972 | acpi_status | |
973 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
974 | struct acpi_gpe_block_info *gpe_block) | |
975 | { | |
976 | acpi_status status; | |
977 | struct acpi_gpe_event_info *gpe_event_info; | |
978 | struct acpi_gpe_walk_info gpe_info; | |
979 | u32 wake_gpe_count; | |
980 | u32 gpe_enabled_count; | |
981 | acpi_native_uint i; | |
982 | acpi_native_uint j; | |
983 | ||
b229cf92 | 984 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
985 | |
986 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
987 | ||
988 | if (!gpe_block) { | |
989 | return_ACPI_STATUS(AE_OK); | |
990 | } | |
991 | ||
1da177e4 | 992 | /* |
96db255c BM |
993 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
994 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
995 | */ |
996 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
997 | /* | |
96db255c BM |
998 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
999 | * Each GPE that has one or more _PRWs that reference it is by | |
1000 | * definition a wake GPE and will not be enabled while the machine | |
1001 | * is running. | |
1da177e4 LT |
1002 | */ |
1003 | gpe_info.gpe_block = gpe_block; | |
1004 | gpe_info.gpe_device = gpe_device; | |
1005 | ||
4be44fcd LB |
1006 | status = |
1007 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
1008 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
1009 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1010 | NULL); | |
1da177e4 LT |
1011 | } |
1012 | ||
1013 | /* | |
96db255c BM |
1014 | * Enable all GPEs in this block that have these attributes: |
1015 | * 1) are "runtime" or "run/wake" GPEs, and | |
1016 | * 2) have a corresponding _Lxx or _Exx method | |
1017 | * | |
1018 | * Any other GPEs within this block must be enabled via the acpi_enable_gpe() | |
1019 | * external interface. | |
1da177e4 LT |
1020 | */ |
1021 | wake_gpe_count = 0; | |
1022 | gpe_enabled_count = 0; | |
1023 | ||
1024 | for (i = 0; i < gpe_block->register_count; i++) { | |
1025 | for (j = 0; j < 8; j++) { | |
52fc0b02 | 1026 | |
1da177e4 LT |
1027 | /* Get the info block for this particular GPE */ |
1028 | ||
4be44fcd LB |
1029 | gpe_event_info = |
1030 | &gpe_block-> | |
1031 | event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 1032 | |
4be44fcd LB |
1033 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
1034 | ACPI_GPE_DISPATCH_METHOD) | |
1035 | && (gpe_event_info-> | |
1036 | flags & ACPI_GPE_TYPE_RUNTIME)) { | |
1da177e4 LT |
1037 | gpe_enabled_count++; |
1038 | } | |
1039 | ||
1040 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1041 | wake_gpe_count++; | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | ||
4be44fcd LB |
1046 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1047 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1048 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1049 | |
96db255c | 1050 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1051 | |
96db255c BM |
1052 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block); |
1053 | if (ACPI_FAILURE(status)) { | |
b229cf92 | 1054 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", |
b8e4d893 | 1055 | gpe_block)); |
1da177e4 LT |
1056 | } |
1057 | ||
96db255c | 1058 | return_ACPI_STATUS(status); |
1da177e4 LT |
1059 | } |
1060 | ||
1da177e4 LT |
1061 | /******************************************************************************* |
1062 | * | |
1063 | * FUNCTION: acpi_ev_gpe_initialize | |
1064 | * | |
1065 | * PARAMETERS: None | |
1066 | * | |
1067 | * RETURN: Status | |
1068 | * | |
1069 | * DESCRIPTION: Initialize the GPE data structures | |
1070 | * | |
1071 | ******************************************************************************/ | |
1072 | ||
4be44fcd | 1073 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1074 | { |
4be44fcd LB |
1075 | u32 register_count0 = 0; |
1076 | u32 register_count1 = 0; | |
1077 | u32 gpe_number_max = 0; | |
1078 | acpi_status status; | |
1da177e4 | 1079 | |
b229cf92 | 1080 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1081 | |
4be44fcd LB |
1082 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1083 | if (ACPI_FAILURE(status)) { | |
1084 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1085 | } |
1086 | ||
1087 | /* | |
1088 | * Initialize the GPE Block(s) defined in the FADT | |
1089 | * | |
1090 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1091 | * section "General-Purpose Event Registers", we have: | |
1092 | * | |
1093 | * "Each register block contains two registers of equal length | |
1094 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1095 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1096 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1097 | * half the GPE1_LEN. If a generic register block is not supported | |
1098 | * then its respective block pointer and block length values in the | |
1099 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1100 | * to be the same size." | |
1101 | */ | |
1102 | ||
1103 | /* | |
1104 | * Determine the maximum GPE number for this machine. | |
1105 | * | |
1106 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1107 | * the other. | |
1108 | * | |
1109 | * If EITHER the register length OR the block address are zero, then that | |
1110 | * particular block is not supported. | |
1111 | */ | |
f3d2e786 BM |
1112 | if (acpi_gbl_FADT.gpe0_block_length && |
1113 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1114 | |
1da177e4 LT |
1115 | /* GPE block 0 exists (has both length and address > 0) */ |
1116 | ||
f3d2e786 | 1117 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1118 | |
4be44fcd LB |
1119 | gpe_number_max = |
1120 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1121 | |
1122 | /* Install GPE Block 0 */ | |
1123 | ||
4be44fcd | 1124 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1125 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1126 | register_count0, 0, |
f3d2e786 | 1127 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1128 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1129 | |
4be44fcd | 1130 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1131 | ACPI_EXCEPTION((AE_INFO, status, |
1132 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1133 | } |
1134 | } | |
1135 | ||
f3d2e786 BM |
1136 | if (acpi_gbl_FADT.gpe1_block_length && |
1137 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1138 | |
1da177e4 LT |
1139 | /* GPE block 1 exists (has both length and address > 0) */ |
1140 | ||
f3d2e786 | 1141 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1142 | |
1143 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1144 | ||
1145 | if ((register_count0) && | |
f3d2e786 | 1146 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 BM |
1147 | ACPI_ERROR((AE_INFO, |
1148 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1149 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1150 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1151 | ((register_count1 * |
1152 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1153 | |
1154 | /* Ignore GPE1 block by setting the register count to zero */ | |
1155 | ||
1156 | register_count1 = 0; | |
4be44fcd | 1157 | } else { |
1da177e4 LT |
1158 | /* Install GPE Block 1 */ |
1159 | ||
4be44fcd LB |
1160 | status = |
1161 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1162 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1163 | register_count1, |
f3d2e786 BM |
1164 | acpi_gbl_FADT.gpe1_base, |
1165 | acpi_gbl_FADT. | |
1166 | sci_interrupt, | |
4be44fcd LB |
1167 | &acpi_gbl_gpe_fadt_blocks |
1168 | [1]); | |
1169 | ||
1170 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1171 | ACPI_EXCEPTION((AE_INFO, status, |
1172 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | /* | |
1176 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1177 | * space. However, GPE0 always starts at GPE number zero. | |
1178 | */ | |
f3d2e786 | 1179 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1180 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1181 | } |
1182 | } | |
1183 | ||
1184 | /* Exit if there are no GPE registers */ | |
1185 | ||
1186 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1187 | |
1da177e4 LT |
1188 | /* GPEs are not required by ACPI, this is OK */ |
1189 | ||
4be44fcd LB |
1190 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1191 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1192 | status = AE_OK; |
1193 | goto cleanup; | |
1194 | } | |
1195 | ||
1196 | /* Check for Max GPE number out-of-range */ | |
1197 | ||
1198 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1199 | ACPI_ERROR((AE_INFO, |
1200 | "Maximum GPE number from FADT is too large: 0x%X", | |
1201 | gpe_number_max)); | |
1da177e4 LT |
1202 | status = AE_BAD_VALUE; |
1203 | goto cleanup; | |
1204 | } | |
1205 | ||
4be44fcd LB |
1206 | cleanup: |
1207 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1208 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1209 | } |