Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
42f8fb75 | 3 | * Module Name: evregion - Operation Region support |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
48 | #include "acinterp.h" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evregion") |
1da177e4 | 52 | |
42f8fb75 BM |
53 | extern u8 acpi_gbl_default_address_spaces[]; |
54 | ||
44f6c012 | 55 | /* Local prototypes */ |
74d3ec77 | 56 | |
8f4f5e78 ZR |
57 | static void |
58 | acpi_ev_orphan_ec_reg_method(struct acpi_namespace_node *ec_device_node); | |
e2066ca1 | 59 | |
44f6c012 | 60 | static acpi_status |
4be44fcd LB |
61 | acpi_ev_reg_run(acpi_handle obj_handle, |
62 | u32 level, void *context, void **return_value); | |
44f6c012 | 63 | |
1da177e4 LT |
64 | /******************************************************************************* |
65 | * | |
66 | * FUNCTION: acpi_ev_initialize_op_regions | |
67 | * | |
68 | * PARAMETERS: None | |
69 | * | |
70 | * RETURN: Status | |
71 | * | |
72 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have | |
73 | * an installed default region handler. | |
74 | * | |
75 | ******************************************************************************/ | |
76 | ||
4be44fcd | 77 | acpi_status acpi_ev_initialize_op_regions(void) |
1da177e4 | 78 | { |
4be44fcd | 79 | acpi_status status; |
67a119f9 | 80 | u32 i; |
1da177e4 | 81 | |
b229cf92 | 82 | ACPI_FUNCTION_TRACE(ev_initialize_op_regions); |
1da177e4 | 83 | |
4be44fcd LB |
84 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
85 | if (ACPI_FAILURE(status)) { | |
86 | return_ACPI_STATUS(status); | |
1da177e4 LT |
87 | } |
88 | ||
9f15fc66 | 89 | /* Run the _REG methods for op_regions in each default address space */ |
52fc0b02 | 90 | |
9f15fc66 BM |
91 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { |
92 | /* | |
74d3ec77 LM |
93 | * Make sure the installed handler is the DEFAULT handler. If not the |
94 | * default, the _REG methods will have already been run (when the | |
95 | * handler was installed) | |
1da177e4 | 96 | */ |
74d3ec77 LM |
97 | if (acpi_ev_has_default_handler(acpi_gbl_root_node, |
98 | acpi_gbl_default_address_spaces | |
99 | [i])) { | |
100 | status = | |
101 | acpi_ev_execute_reg_methods(acpi_gbl_root_node, | |
102 | acpi_gbl_default_address_spaces | |
103 | [i]); | |
104 | } | |
1da177e4 LT |
105 | } |
106 | ||
ef09c4f5 BM |
107 | acpi_gbl_reg_methods_executed = TRUE; |
108 | ||
4be44fcd LB |
109 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
110 | return_ACPI_STATUS(status); | |
1da177e4 LT |
111 | } |
112 | ||
1da177e4 LT |
113 | /******************************************************************************* |
114 | * | |
115 | * FUNCTION: acpi_ev_address_space_dispatch | |
116 | * | |
117 | * PARAMETERS: region_obj - Internal region object | |
9ce81784 | 118 | * field_obj - Corresponding field. Can be NULL. |
ba494bee | 119 | * function - Read or Write operation |
f5407af3 | 120 | * region_offset - Where in the region to read or write |
1da177e4 | 121 | * bit_width - Field width in bits (8, 16, 32, or 64) |
ba494bee | 122 | * value - Pointer to in or out value, must be |
5df7e6cb | 123 | * a full 64-bit integer |
1da177e4 LT |
124 | * |
125 | * RETURN: Status | |
126 | * | |
127 | * DESCRIPTION: Dispatch an address space or operation region access to | |
128 | * a previously installed handler. | |
129 | * | |
130 | ******************************************************************************/ | |
131 | ||
132 | acpi_status | |
4be44fcd | 133 | acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, |
9ce81784 | 134 | union acpi_operand_object *field_obj, |
4be44fcd | 135 | u32 function, |
5df7e6cb | 136 | u32 region_offset, u32 bit_width, u64 *value) |
1da177e4 | 137 | { |
4be44fcd | 138 | acpi_status status; |
4be44fcd LB |
139 | acpi_adr_space_handler handler; |
140 | acpi_adr_space_setup region_setup; | |
141 | union acpi_operand_object *handler_desc; | |
142 | union acpi_operand_object *region_obj2; | |
143 | void *region_context = NULL; | |
9ce81784 | 144 | struct acpi_connection_info *context; |
1da177e4 | 145 | |
b229cf92 | 146 | ACPI_FUNCTION_TRACE(ev_address_space_dispatch); |
1da177e4 | 147 | |
4be44fcd | 148 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 | 149 | if (!region_obj2) { |
4be44fcd | 150 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
151 | } |
152 | ||
153 | /* Ensure that there is a handler associated with this region */ | |
154 | ||
155 | handler_desc = region_obj->region.handler; | |
156 | if (!handler_desc) { | |
b8e4d893 BM |
157 | ACPI_ERROR((AE_INFO, |
158 | "No handler for Region [%4.4s] (%p) [%s]", | |
159 | acpi_ut_get_node_name(region_obj->region.node), | |
160 | region_obj, | |
161 | acpi_ut_get_region_name(region_obj->region. | |
162 | space_id))); | |
4be44fcd LB |
163 | |
164 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1da177e4 LT |
165 | } |
166 | ||
9ce81784 BM |
167 | context = handler_desc->address_space.context; |
168 | ||
1da177e4 | 169 | /* |
9f15fc66 | 170 | * It may be the case that the region has never been initialized. |
1da177e4 LT |
171 | * Some types of regions require special init code |
172 | */ | |
173 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
9f15fc66 BM |
174 | |
175 | /* This region has not been initialized yet, do it */ | |
176 | ||
1da177e4 LT |
177 | region_setup = handler_desc->address_space.setup; |
178 | if (!region_setup) { | |
52fc0b02 | 179 | |
1da177e4 LT |
180 | /* No initialization routine, exit with error */ |
181 | ||
b8e4d893 BM |
182 | ACPI_ERROR((AE_INFO, |
183 | "No init routine for region(%p) [%s]", | |
184 | region_obj, | |
185 | acpi_ut_get_region_name(region_obj->region. | |
186 | space_id))); | |
4be44fcd | 187 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
188 | } |
189 | ||
190 | /* | |
9f15fc66 BM |
191 | * We must exit the interpreter because the region setup will |
192 | * potentially execute control methods (for example, the _REG method | |
193 | * for this region) | |
1da177e4 | 194 | */ |
014d433f | 195 | acpi_ex_exit_interpreter(); |
1da177e4 | 196 | |
4be44fcd | 197 | status = region_setup(region_obj, ACPI_REGION_ACTIVATE, |
9ce81784 | 198 | context, ®ion_context); |
1da177e4 LT |
199 | |
200 | /* Re-enter the interpreter */ | |
201 | ||
014d433f | 202 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
203 | |
204 | /* Check for failure of the Region Setup */ | |
205 | ||
4be44fcd | 206 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
207 | ACPI_EXCEPTION((AE_INFO, status, |
208 | "During region initialization: [%s]", | |
209 | acpi_ut_get_region_name(region_obj-> | |
210 | region. | |
211 | space_id))); | |
4be44fcd | 212 | return_ACPI_STATUS(status); |
1da177e4 LT |
213 | } |
214 | ||
9f15fc66 BM |
215 | /* Region initialization may have been completed by region_setup */ |
216 | ||
1da177e4 LT |
217 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { |
218 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
219 | ||
d2e7d079 DB |
220 | /* |
221 | * Save the returned context for use in all accesses to | |
222 | * the handler for this particular region | |
223 | */ | |
224 | if (!(region_obj2->extra.region_context)) { | |
4be44fcd LB |
225 | region_obj2->extra.region_context = |
226 | region_context; | |
1da177e4 LT |
227 | } |
228 | } | |
229 | } | |
230 | ||
231 | /* We have everything we need, we can invoke the address space handler */ | |
232 | ||
233 | handler = handler_desc->address_space.handler; | |
234 | ||
4be44fcd LB |
235 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
236 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", | |
237 | ®ion_obj->region.handler->address_space, handler, | |
f5407af3 BM |
238 | ACPI_FORMAT_NATIVE_UINT(region_obj->region.address + |
239 | region_offset), | |
4be44fcd LB |
240 | acpi_ut_get_region_name(region_obj->region. |
241 | space_id))); | |
1da177e4 | 242 | |
9ce81784 BM |
243 | /* |
244 | * Special handling for generic_serial_bus and general_purpose_io: | |
245 | * There are three extra parameters that must be passed to the | |
246 | * handler via the context: | |
247 | * 1) Connection buffer, a resource template from Connection() op. | |
248 | * 2) Length of the above buffer. | |
249 | * 3) Actual access length from the access_as() op. | |
250 | */ | |
251 | if (((region_obj->region.space_id == ACPI_ADR_SPACE_GSBUS) || | |
252 | (region_obj->region.space_id == ACPI_ADR_SPACE_GPIO)) && | |
253 | context && field_obj) { | |
254 | ||
255 | /* Get the Connection (resource_template) buffer */ | |
256 | ||
257 | context->connection = field_obj->field.resource_buffer; | |
258 | context->length = field_obj->field.resource_length; | |
259 | context->access_length = field_obj->field.access_length; | |
260 | } | |
261 | ||
61686124 BM |
262 | if (!(handler_desc->address_space.handler_flags & |
263 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
264 | /* |
265 | * For handlers other than the default (supplied) handlers, we must | |
266 | * exit the interpreter because the handler *might* block -- we don't | |
267 | * know what it will do, so we can't hold the lock on the intepreter. | |
268 | */ | |
014d433f | 269 | acpi_ex_exit_interpreter(); |
1da177e4 LT |
270 | } |
271 | ||
272 | /* Call the handler */ | |
273 | ||
f5407af3 BM |
274 | status = handler(function, |
275 | (region_obj->region.address + region_offset), | |
9ce81784 | 276 | bit_width, value, context, |
1da177e4 LT |
277 | region_obj2->extra.region_context); |
278 | ||
4be44fcd | 279 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
280 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", |
281 | acpi_ut_get_region_name(region_obj->region. | |
282 | space_id))); | |
1da177e4 LT |
283 | } |
284 | ||
61686124 BM |
285 | if (!(handler_desc->address_space.handler_flags & |
286 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
287 | /* |
288 | * We just returned from a non-default handler, we must re-enter the | |
289 | * interpreter | |
290 | */ | |
014d433f | 291 | acpi_ex_enter_interpreter(); |
1da177e4 LT |
292 | } |
293 | ||
4be44fcd | 294 | return_ACPI_STATUS(status); |
1da177e4 LT |
295 | } |
296 | ||
1da177e4 LT |
297 | /******************************************************************************* |
298 | * | |
299 | * FUNCTION: acpi_ev_detach_region | |
300 | * | |
301 | * PARAMETERS: region_obj - Region Object | |
302 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
303 | * | |
304 | * RETURN: None | |
305 | * | |
306 | * DESCRIPTION: Break the association between the handler and the region | |
307 | * this is a two way association. | |
308 | * | |
309 | ******************************************************************************/ | |
310 | ||
311 | void | |
4be44fcd LB |
312 | acpi_ev_detach_region(union acpi_operand_object *region_obj, |
313 | u8 acpi_ns_is_locked) | |
1da177e4 | 314 | { |
4be44fcd LB |
315 | union acpi_operand_object *handler_obj; |
316 | union acpi_operand_object *obj_desc; | |
317 | union acpi_operand_object **last_obj_ptr; | |
318 | acpi_adr_space_setup region_setup; | |
319 | void **region_context; | |
320 | union acpi_operand_object *region_obj2; | |
321 | acpi_status status; | |
1da177e4 | 322 | |
b229cf92 | 323 | ACPI_FUNCTION_TRACE(ev_detach_region); |
1da177e4 | 324 | |
4be44fcd | 325 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 LT |
326 | if (!region_obj2) { |
327 | return_VOID; | |
328 | } | |
329 | region_context = ®ion_obj2->extra.region_context; | |
330 | ||
331 | /* Get the address handler from the region object */ | |
332 | ||
333 | handler_obj = region_obj->region.handler; | |
334 | if (!handler_obj) { | |
52fc0b02 | 335 | |
1da177e4 LT |
336 | /* This region has no handler, all done */ |
337 | ||
338 | return_VOID; | |
339 | } | |
340 | ||
341 | /* Find this region in the handler's list */ | |
342 | ||
343 | obj_desc = handler_obj->address_space.region_list; | |
344 | last_obj_ptr = &handler_obj->address_space.region_list; | |
345 | ||
346 | while (obj_desc) { | |
52fc0b02 | 347 | |
1da177e4 LT |
348 | /* Is this the correct Region? */ |
349 | ||
350 | if (obj_desc == region_obj) { | |
4be44fcd LB |
351 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
352 | "Removing Region %p from address handler %p\n", | |
353 | region_obj, handler_obj)); | |
1da177e4 LT |
354 | |
355 | /* This is it, remove it from the handler's list */ | |
356 | ||
357 | *last_obj_ptr = obj_desc->region.next; | |
4be44fcd | 358 | obj_desc->region.next = NULL; /* Must clear field */ |
1da177e4 LT |
359 | |
360 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
361 | status = |
362 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
363 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
364 | return_VOID; |
365 | } | |
366 | } | |
367 | ||
368 | /* Now stop region accesses by executing the _REG method */ | |
369 | ||
e2066ca1 BM |
370 | status = |
371 | acpi_ev_execute_reg_method(region_obj, | |
372 | ACPI_REG_DISCONNECT); | |
4be44fcd | 373 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
374 | ACPI_EXCEPTION((AE_INFO, status, |
375 | "from region _REG, [%s]", | |
376 | acpi_ut_get_region_name | |
377 | (region_obj->region.space_id))); | |
1da177e4 LT |
378 | } |
379 | ||
380 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
381 | status = |
382 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
383 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
384 | return_VOID; |
385 | } | |
386 | } | |
387 | ||
f6dd9221 | 388 | /* |
9f15fc66 BM |
389 | * If the region has been activated, call the setup handler with |
390 | * the deactivate notification | |
f6dd9221 BM |
391 | */ |
392 | if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { | |
393 | region_setup = handler_obj->address_space.setup; | |
394 | status = | |
395 | region_setup(region_obj, | |
396 | ACPI_REGION_DEACTIVATE, | |
397 | handler_obj->address_space. | |
398 | context, region_context); | |
1da177e4 | 399 | |
d2e7d079 DB |
400 | /* |
401 | * region_context should have been released by the deactivate | |
402 | * operation. We don't need access to it anymore here. | |
403 | */ | |
404 | if (region_context) { | |
405 | *region_context = NULL; | |
406 | } | |
407 | ||
f6dd9221 | 408 | /* Init routine may fail, Just ignore errors */ |
1da177e4 | 409 | |
f6dd9221 BM |
410 | if (ACPI_FAILURE(status)) { |
411 | ACPI_EXCEPTION((AE_INFO, status, | |
412 | "from region handler - deactivate, [%s]", | |
413 | acpi_ut_get_region_name | |
414 | (region_obj->region. | |
415 | space_id))); | |
416 | } | |
1da177e4 | 417 | |
f6dd9221 BM |
418 | region_obj->region.flags &= |
419 | ~(AOPOBJ_SETUP_COMPLETE); | |
1da177e4 LT |
420 | } |
421 | ||
1da177e4 LT |
422 | /* |
423 | * Remove handler reference in the region | |
424 | * | |
f6dd9221 BM |
425 | * NOTE: this doesn't mean that the region goes away, the region |
426 | * is just inaccessible as indicated to the _REG method | |
1da177e4 | 427 | * |
f6dd9221 BM |
428 | * If the region is on the handler's list, this must be the |
429 | * region's handler | |
1da177e4 LT |
430 | */ |
431 | region_obj->region.handler = NULL; | |
4be44fcd | 432 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
433 | |
434 | return_VOID; | |
435 | } | |
436 | ||
437 | /* Walk the linked list of handlers */ | |
438 | ||
439 | last_obj_ptr = &obj_desc->region.next; | |
440 | obj_desc = obj_desc->region.next; | |
441 | } | |
442 | ||
443 | /* If we get here, the region was not in the handler's region list */ | |
444 | ||
4be44fcd LB |
445 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
446 | "Cannot remove region %p from address handler %p\n", | |
447 | region_obj, handler_obj)); | |
1da177e4 LT |
448 | |
449 | return_VOID; | |
450 | } | |
451 | ||
1da177e4 LT |
452 | /******************************************************************************* |
453 | * | |
454 | * FUNCTION: acpi_ev_attach_region | |
455 | * | |
456 | * PARAMETERS: handler_obj - Handler Object | |
457 | * region_obj - Region Object | |
458 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
459 | * | |
460 | * RETURN: None | |
461 | * | |
462 | * DESCRIPTION: Create the association between the handler and the region | |
463 | * this is a two way association. | |
464 | * | |
465 | ******************************************************************************/ | |
466 | ||
467 | acpi_status | |
4be44fcd LB |
468 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, |
469 | union acpi_operand_object *region_obj, | |
470 | u8 acpi_ns_is_locked) | |
1da177e4 LT |
471 | { |
472 | ||
b229cf92 | 473 | ACPI_FUNCTION_TRACE(ev_attach_region); |
1da177e4 | 474 | |
4be44fcd LB |
475 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
476 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
477 | acpi_ut_get_node_name(region_obj->region.node), | |
478 | region_obj, handler_obj, | |
479 | acpi_ut_get_region_name(region_obj->region. | |
480 | space_id))); | |
1da177e4 LT |
481 | |
482 | /* Link this region to the front of the handler's list */ | |
483 | ||
484 | region_obj->region.next = handler_obj->address_space.region_list; | |
485 | handler_obj->address_space.region_list = region_obj; | |
486 | ||
487 | /* Install the region's handler */ | |
488 | ||
489 | if (region_obj->region.handler) { | |
4be44fcd | 490 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
1da177e4 LT |
491 | } |
492 | ||
493 | region_obj->region.handler = handler_obj; | |
4be44fcd | 494 | acpi_ut_add_reference(handler_obj); |
1da177e4 | 495 | |
4be44fcd | 496 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
497 | } |
498 | ||
1da177e4 LT |
499 | /******************************************************************************* |
500 | * | |
42f8fb75 | 501 | * FUNCTION: acpi_ev_execute_reg_method |
1da177e4 | 502 | * |
42f8fb75 BM |
503 | * PARAMETERS: region_obj - Region object |
504 | * function - Passed to _REG: On (1) or Off (0) | |
1da177e4 LT |
505 | * |
506 | * RETURN: Status | |
507 | * | |
42f8fb75 | 508 | * DESCRIPTION: Execute _REG method for a region |
1da177e4 LT |
509 | * |
510 | ******************************************************************************/ | |
511 | ||
512 | acpi_status | |
42f8fb75 | 513 | acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) |
1da177e4 | 514 | { |
42f8fb75 BM |
515 | struct acpi_evaluate_info *info; |
516 | union acpi_operand_object *args[3]; | |
517 | union acpi_operand_object *region_obj2; | |
4be44fcd | 518 | acpi_status status; |
1da177e4 | 519 | |
42f8fb75 | 520 | ACPI_FUNCTION_TRACE(ev_execute_reg_method); |
1da177e4 | 521 | |
42f8fb75 BM |
522 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
523 | if (!region_obj2) { | |
524 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1da177e4 LT |
525 | } |
526 | ||
42f8fb75 BM |
527 | if (region_obj2->extra.method_REG == NULL) { |
528 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
529 | } |
530 | ||
42f8fb75 | 531 | /* Allocate and initialize the evaluation information block */ |
1da177e4 | 532 | |
42f8fb75 BM |
533 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
534 | if (!info) { | |
535 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
536 | } |
537 | ||
42f8fb75 | 538 | info->prefix_node = region_obj2->extra.method_REG; |
29a241cc | 539 | info->relative_pathname = NULL; |
42f8fb75 BM |
540 | info->parameters = args; |
541 | info->flags = ACPI_IGNORE_RETURN_VALUE; | |
1da177e4 LT |
542 | |
543 | /* | |
42f8fb75 BM |
544 | * The _REG method has two arguments: |
545 | * | |
546 | * arg0 - Integer: | |
547 | * Operation region space ID Same value as region_obj->Region.space_id | |
1da177e4 | 548 | * |
42f8fb75 BM |
549 | * arg1 - Integer: |
550 | * connection status 1 for connecting the handler, 0 for disconnecting | |
551 | * the handler (Passed as a parameter) | |
1da177e4 | 552 | */ |
42f8fb75 BM |
553 | args[0] = |
554 | acpi_ut_create_integer_object((u64)region_obj->region.space_id); | |
555 | if (!args[0]) { | |
1da177e4 | 556 | status = AE_NO_MEMORY; |
42f8fb75 | 557 | goto cleanup1; |
1da177e4 LT |
558 | } |
559 | ||
42f8fb75 BM |
560 | args[1] = acpi_ut_create_integer_object((u64)function); |
561 | if (!args[1]) { | |
562 | status = AE_NO_MEMORY; | |
563 | goto cleanup2; | |
564 | } | |
1da177e4 | 565 | |
42f8fb75 | 566 | args[2] = NULL; /* Terminate list */ |
1da177e4 | 567 | |
42f8fb75 | 568 | /* Execute the method, no return value */ |
1da177e4 | 569 | |
42f8fb75 BM |
570 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
571 | (ACPI_TYPE_METHOD, info->prefix_node, NULL)); | |
1da177e4 | 572 | |
42f8fb75 BM |
573 | status = acpi_ns_evaluate(info); |
574 | acpi_ut_remove_reference(args[1]); | |
1da177e4 | 575 | |
10622bf8 | 576 | cleanup2: |
42f8fb75 | 577 | acpi_ut_remove_reference(args[0]); |
1da177e4 | 578 | |
10622bf8 | 579 | cleanup1: |
42f8fb75 | 580 | ACPI_FREE(info); |
4be44fcd | 581 | return_ACPI_STATUS(status); |
1da177e4 LT |
582 | } |
583 | ||
1da177e4 LT |
584 | /******************************************************************************* |
585 | * | |
586 | * FUNCTION: acpi_ev_execute_reg_methods | |
587 | * | |
ba494bee | 588 | * PARAMETERS: node - Namespace node for the device |
1da177e4 LT |
589 | * space_id - The address space ID |
590 | * | |
591 | * RETURN: Status | |
592 | * | |
593 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
594 | * Note: assumes namespace is locked, or system init time. | |
595 | * | |
596 | ******************************************************************************/ | |
597 | ||
598 | acpi_status | |
4be44fcd LB |
599 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, |
600 | acpi_adr_space_type space_id) | |
1da177e4 | 601 | { |
4be44fcd | 602 | acpi_status status; |
1da177e4 | 603 | |
b229cf92 | 604 | ACPI_FUNCTION_TRACE(ev_execute_reg_methods); |
1da177e4 LT |
605 | |
606 | /* | |
9f15fc66 BM |
607 | * Run all _REG methods for all Operation Regions for this space ID. This |
608 | * is a separate walk in order to handle any interdependencies between | |
609 | * regions and _REG methods. (i.e. handlers must be installed for all | |
610 | * regions of this Space ID before we can run any _REG methods) | |
1da177e4 | 611 | */ |
4be44fcd LB |
612 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
613 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
2263576c | 614 | NULL, &space_id, NULL); |
1da177e4 | 615 | |
e2066ca1 BM |
616 | /* Special case for EC: handle "orphan" _REG methods with no region */ |
617 | ||
618 | if (space_id == ACPI_ADR_SPACE_EC) { | |
8f4f5e78 | 619 | acpi_ev_orphan_ec_reg_method(node); |
e2066ca1 BM |
620 | } |
621 | ||
4be44fcd | 622 | return_ACPI_STATUS(status); |
1da177e4 LT |
623 | } |
624 | ||
1da177e4 LT |
625 | /******************************************************************************* |
626 | * | |
627 | * FUNCTION: acpi_ev_reg_run | |
628 | * | |
629 | * PARAMETERS: walk_namespace callback | |
630 | * | |
ba494bee | 631 | * DESCRIPTION: Run _REG method for region objects of the requested spaceID |
1da177e4 LT |
632 | * |
633 | ******************************************************************************/ | |
634 | ||
44f6c012 | 635 | static acpi_status |
4be44fcd LB |
636 | acpi_ev_reg_run(acpi_handle obj_handle, |
637 | u32 level, void *context, void **return_value) | |
1da177e4 | 638 | { |
4be44fcd LB |
639 | union acpi_operand_object *obj_desc; |
640 | struct acpi_namespace_node *node; | |
641 | acpi_adr_space_type space_id; | |
642 | acpi_status status; | |
1da177e4 | 643 | |
4be44fcd | 644 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); |
1da177e4 LT |
645 | |
646 | /* Convert and validate the device handle */ | |
647 | ||
f24b664d | 648 | node = acpi_ns_validate_handle(obj_handle); |
1da177e4 LT |
649 | if (!node) { |
650 | return (AE_BAD_PARAMETER); | |
651 | } | |
652 | ||
653 | /* | |
9f15fc66 BM |
654 | * We only care about regions.and objects that are allowed to have address |
655 | * space handlers | |
1da177e4 | 656 | */ |
4be44fcd | 657 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
658 | return (AE_OK); |
659 | } | |
660 | ||
661 | /* Check for an existing internal object */ | |
662 | ||
4be44fcd | 663 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 664 | if (!obj_desc) { |
52fc0b02 | 665 | |
1da177e4 LT |
666 | /* No object, just exit */ |
667 | ||
668 | return (AE_OK); | |
669 | } | |
670 | ||
671 | /* Object is a Region */ | |
672 | ||
673 | if (obj_desc->region.space_id != space_id) { | |
9f15fc66 BM |
674 | |
675 | /* This region is for a different address space, just ignore it */ | |
676 | ||
1da177e4 LT |
677 | return (AE_OK); |
678 | } | |
679 | ||
e2066ca1 | 680 | status = acpi_ev_execute_reg_method(obj_desc, ACPI_REG_CONNECT); |
1da177e4 LT |
681 | return (status); |
682 | } | |
e2066ca1 BM |
683 | |
684 | /******************************************************************************* | |
685 | * | |
686 | * FUNCTION: acpi_ev_orphan_ec_reg_method | |
687 | * | |
8f4f5e78 | 688 | * PARAMETERS: ec_device_node - Namespace node for an EC device |
e2066ca1 BM |
689 | * |
690 | * RETURN: None | |
691 | * | |
692 | * DESCRIPTION: Execute an "orphan" _REG method that appears under the EC | |
693 | * device. This is a _REG method that has no corresponding region | |
694 | * within the EC device scope. The orphan _REG method appears to | |
695 | * have been enabled by the description of the ECDT in the ACPI | |
696 | * specification: "The availability of the region space can be | |
697 | * detected by providing a _REG method object underneath the | |
698 | * Embedded Controller device." | |
699 | * | |
8f4f5e78 ZR |
700 | * To quickly access the EC device, we use the ec_device_node used |
701 | * during EC handler installation. Otherwise, we would need to | |
702 | * perform a time consuming namespace walk, executing _HID | |
703 | * methods to find the EC device. | |
704 | * | |
705 | * MUTEX: Assumes the namespace is locked | |
e2066ca1 BM |
706 | * |
707 | ******************************************************************************/ | |
708 | ||
8f4f5e78 ZR |
709 | static void |
710 | acpi_ev_orphan_ec_reg_method(struct acpi_namespace_node *ec_device_node) | |
e2066ca1 | 711 | { |
8f4f5e78 ZR |
712 | acpi_handle reg_method; |
713 | struct acpi_namespace_node *next_node; | |
e2066ca1 BM |
714 | acpi_status status; |
715 | struct acpi_object_list args; | |
716 | union acpi_object objects[2]; | |
e2066ca1 BM |
717 | |
718 | ACPI_FUNCTION_TRACE(ev_orphan_ec_reg_method); | |
719 | ||
8f4f5e78 | 720 | if (!ec_device_node) { |
e2066ca1 BM |
721 | return_VOID; |
722 | } | |
723 | ||
724 | /* Namespace is currently locked, must release */ | |
725 | ||
726 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
727 | ||
e2066ca1 BM |
728 | /* Get a handle to a _REG method immediately under the EC device */ |
729 | ||
8f4f5e78 | 730 | status = acpi_get_handle(ec_device_node, METHOD_NAME__REG, ®_method); |
e2066ca1 | 731 | if (ACPI_FAILURE(status)) { |
8f4f5e78 | 732 | goto exit; /* There is no _REG method present */ |
e2066ca1 BM |
733 | } |
734 | ||
735 | /* | |
736 | * Execute the _REG method only if there is no Operation Region in | |
737 | * this scope with the Embedded Controller space ID. Otherwise, it | |
738 | * will already have been executed. Note, this allows for Regions | |
739 | * with other space IDs to be present; but the code below will then | |
8f4f5e78 | 740 | * execute the _REG method with the embedded_control space_ID argument. |
e2066ca1 BM |
741 | */ |
742 | next_node = acpi_ns_get_next_node(ec_device_node, NULL); | |
743 | while (next_node) { | |
744 | if ((next_node->type == ACPI_TYPE_REGION) && | |
745 | (next_node->object) && | |
746 | (next_node->object->region.space_id == ACPI_ADR_SPACE_EC)) { | |
8f4f5e78 | 747 | goto exit; /* Do not execute the _REG */ |
e2066ca1 | 748 | } |
8f4f5e78 | 749 | |
e2066ca1 BM |
750 | next_node = acpi_ns_get_next_node(ec_device_node, next_node); |
751 | } | |
752 | ||
8f4f5e78 | 753 | /* Evaluate the _REG(embedded_control,Connect) method */ |
e2066ca1 BM |
754 | |
755 | args.count = 2; | |
756 | args.pointer = objects; | |
757 | objects[0].type = ACPI_TYPE_INTEGER; | |
758 | objects[0].integer.value = ACPI_ADR_SPACE_EC; | |
759 | objects[1].type = ACPI_TYPE_INTEGER; | |
760 | objects[1].integer.value = ACPI_REG_CONNECT; | |
761 | ||
762 | status = acpi_evaluate_object(reg_method, NULL, &args, NULL); | |
763 | ||
10622bf8 | 764 | exit: |
e2066ca1 BM |
765 | /* We ignore all errors from above, don't care */ |
766 | ||
767 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
768 | return_VOID; | |
769 | } |