blob: 6da58e776413a819123d3401f080ac7df702d9c0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: evregion - ACPI address_space (op_region) handler dispatch
4 *
5 *****************************************************************************/
6
7/*
Bob Moore4a90c7e2006-01-13 16:22:00 -05008 * Copyright (C) 2000 - 2006, R. Byron Moore
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
45#include <acpi/acevents.h>
46#include <acpi/acnamesp.h>
47#include <acpi/acinterp.h>
48
49#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040050ACPI_MODULE_NAME("evregion")
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_NUM_DEFAULT_SPACES 4
Len Brown4be44fc2005-08-05 00:44:28 -040052static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
53 ACPI_ADR_SPACE_SYSTEM_MEMORY,
54 ACPI_ADR_SPACE_SYSTEM_IO,
55 ACPI_ADR_SPACE_PCI_CONFIG,
56 ACPI_ADR_SPACE_DATA_TABLE
57};
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Robert Moore44f6c012005-04-18 22:49:35 -040059/* Local prototypes */
60
61static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040062acpi_ev_reg_run(acpi_handle obj_handle,
63 u32 level, void *context, void **return_value);
Robert Moore44f6c012005-04-18 22:49:35 -040064
65static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040066acpi_ev_install_handler(acpi_handle obj_handle,
67 u32 level, void *context, void **return_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/*******************************************************************************
70 *
71 * FUNCTION: acpi_ev_install_region_handlers
72 *
73 * PARAMETERS: None
74 *
75 * RETURN: Status
76 *
77 * DESCRIPTION: Installs the core subsystem default address space handlers.
78 *
79 ******************************************************************************/
80
Len Brown4be44fc2005-08-05 00:44:28 -040081acpi_status acpi_ev_install_region_handlers(void)
82{
83 acpi_status status;
84 acpi_native_uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Len Brown4be44fc2005-08-05 00:44:28 -040086 ACPI_FUNCTION_TRACE("ev_install_region_handlers");
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Len Brown4be44fc2005-08-05 00:44:28 -040088 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
89 if (ACPI_FAILURE(status)) {
90 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 }
92
93 /*
94 * All address spaces (PCI Config, EC, SMBus) are scope dependent
95 * and registration must occur for a specific device.
96 *
97 * In the case of the system memory and IO address spaces there is currently
98 * no device associated with the address space. For these we use the root.
99 *
100 * We install the default PCI config space handler at the root so
101 * that this space is immediately available even though the we have
102 * not enumerated all the PCI Root Buses yet. This is to conform
103 * to the ACPI specification which states that the PCI config
104 * space must be always available -- even though we are nowhere
105 * near ready to find the PCI root buses at this point.
106 *
107 * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
108 * has already been installed (via acpi_install_address_space_handler).
109 * Similar for AE_SAME_HANDLER.
110 */
111 for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400112 status = acpi_ev_install_space_handler(acpi_gbl_root_node,
113 acpi_gbl_default_address_spaces
114 [i],
115 ACPI_DEFAULT_HANDLER,
116 NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 switch (status) {
118 case AE_OK:
119 case AE_SAME_HANDLER:
120 case AE_ALREADY_EXISTS:
121
122 /* These exceptions are all OK */
123
124 status = AE_OK;
125 break;
126
127 default:
128
129 goto unlock_and_exit;
130 }
131 }
132
Len Brown4be44fc2005-08-05 00:44:28 -0400133 unlock_and_exit:
134 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
135 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138/*******************************************************************************
139 *
140 * FUNCTION: acpi_ev_initialize_op_regions
141 *
142 * PARAMETERS: None
143 *
144 * RETURN: Status
145 *
146 * DESCRIPTION: Execute _REG methods for all Operation Regions that have
147 * an installed default region handler.
148 *
149 ******************************************************************************/
150
Len Brown4be44fc2005-08-05 00:44:28 -0400151acpi_status acpi_ev_initialize_op_regions(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Len Brown4be44fc2005-08-05 00:44:28 -0400153 acpi_status status;
154 acpi_native_uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Len Brown4be44fc2005-08-05 00:44:28 -0400156 ACPI_FUNCTION_TRACE("ev_initialize_op_regions");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Len Brown4be44fc2005-08-05 00:44:28 -0400158 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
159 if (ACPI_FAILURE(status)) {
160 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 }
162
163 /*
164 * Run the _REG methods for op_regions in each default address space
165 */
166 for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
167 /* TBD: Make sure handler is the DEFAULT handler, otherwise
168 * _REG will have already been run.
169 */
Len Brown4be44fc2005-08-05 00:44:28 -0400170 status = acpi_ev_execute_reg_methods(acpi_gbl_root_node,
171 acpi_gbl_default_address_spaces
172 [i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 }
174
Len Brown4be44fc2005-08-05 00:44:28 -0400175 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
176 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179/*******************************************************************************
180 *
181 * FUNCTION: acpi_ev_execute_reg_method
182 *
Robert Moore44f6c012005-04-18 22:49:35 -0400183 * PARAMETERS: region_obj - Region object
184 * Function - Passed to _REG: On (1) or Off (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 *
186 * RETURN: Status
187 *
188 * DESCRIPTION: Execute _REG method for a region
189 *
190 ******************************************************************************/
191
192acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400193acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
Len Brown4be44fc2005-08-05 00:44:28 -0400195 struct acpi_parameter_info info;
196 union acpi_operand_object *params[3];
197 union acpi_operand_object *region_obj2;
198 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Len Brown4be44fc2005-08-05 00:44:28 -0400200 ACPI_FUNCTION_TRACE("ev_execute_reg_method");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Len Brown4be44fc2005-08-05 00:44:28 -0400202 region_obj2 = acpi_ns_get_secondary_object(region_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 if (!region_obj2) {
Len Brown4be44fc2005-08-05 00:44:28 -0400204 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 }
206
207 if (region_obj2->extra.method_REG == NULL) {
Len Brown4be44fc2005-08-05 00:44:28 -0400208 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 }
210
211 /*
212 * The _REG method has two arguments:
213 *
214 * Arg0, Integer: Operation region space ID
215 * Same value as region_obj->Region.space_id
216 * Arg1, Integer: connection status
217 * 1 for connecting the handler,
218 * 0 for disconnecting the handler
219 * Passed as a parameter
220 */
Len Brown4be44fc2005-08-05 00:44:28 -0400221 params[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 if (!params[0]) {
Len Brown4be44fc2005-08-05 00:44:28 -0400223 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
225
Len Brown4be44fc2005-08-05 00:44:28 -0400226 params[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 if (!params[1]) {
228 status = AE_NO_MEMORY;
229 goto cleanup;
230 }
231
232 /* Setup the parameter objects */
233
234 params[0]->integer.value = region_obj->region.space_id;
235 params[1]->integer.value = function;
236 params[2] = NULL;
237
238 info.node = region_obj2->extra.method_REG;
239 info.parameters = params;
240 info.parameter_type = ACPI_PARAM_ARGS;
241
242 /* Execute the method, no return value */
243
Len Brown4be44fc2005-08-05 00:44:28 -0400244 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
245 (ACPI_TYPE_METHOD, info.node, NULL));
246 status = acpi_ns_evaluate_by_handle(&info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Len Brown4be44fc2005-08-05 00:44:28 -0400248 acpi_ut_remove_reference(params[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Len Brown4be44fc2005-08-05 00:44:28 -0400250 cleanup:
251 acpi_ut_remove_reference(params[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Len Brown4be44fc2005-08-05 00:44:28 -0400253 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254}
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256/*******************************************************************************
257 *
258 * FUNCTION: acpi_ev_address_space_dispatch
259 *
260 * PARAMETERS: region_obj - Internal region object
261 * Function - Read or Write operation
262 * Address - Where in the space to read or write
263 * bit_width - Field width in bits (8, 16, 32, or 64)
264 * Value - Pointer to in or out value
265 *
266 * RETURN: Status
267 *
268 * DESCRIPTION: Dispatch an address space or operation region access to
269 * a previously installed handler.
270 *
271 ******************************************************************************/
272
273acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400274acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
275 u32 function,
276 acpi_physical_address address,
277 u32 bit_width, void *value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
Len Brown4be44fc2005-08-05 00:44:28 -0400279 acpi_status status;
280 acpi_status status2;
281 acpi_adr_space_handler handler;
282 acpi_adr_space_setup region_setup;
283 union acpi_operand_object *handler_desc;
284 union acpi_operand_object *region_obj2;
285 void *region_context = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Len Brown4be44fc2005-08-05 00:44:28 -0400287 ACPI_FUNCTION_TRACE("ev_address_space_dispatch");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Len Brown4be44fc2005-08-05 00:44:28 -0400289 region_obj2 = acpi_ns_get_secondary_object(region_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 if (!region_obj2) {
Len Brown4be44fc2005-08-05 00:44:28 -0400291 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 }
293
294 /* Ensure that there is a handler associated with this region */
295
296 handler_desc = region_obj->region.handler;
297 if (!handler_desc) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500298 ACPI_ERROR((AE_INFO,
299 "No handler for Region [%4.4s] (%p) [%s]",
300 acpi_ut_get_node_name(region_obj->region.node),
301 region_obj,
302 acpi_ut_get_region_name(region_obj->region.
303 space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Len Brown4be44fc2005-08-05 00:44:28 -0400305 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
307
308 /*
309 * It may be the case that the region has never been initialized
310 * Some types of regions require special init code
311 */
312 if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
313 /*
314 * This region has not been initialized yet, do it
315 */
316 region_setup = handler_desc->address_space.setup;
317 if (!region_setup) {
318 /* No initialization routine, exit with error */
319
Bob Mooreb8e4d892006-01-27 16:43:00 -0500320 ACPI_ERROR((AE_INFO,
321 "No init routine for region(%p) [%s]",
322 region_obj,
323 acpi_ut_get_region_name(region_obj->region.
324 space_id)));
Len Brown4be44fc2005-08-05 00:44:28 -0400325 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 }
327
328 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400329 * We must exit the interpreter because the region
330 * setup will potentially execute control methods
331 * (e.g., _REG method for this region)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 */
Len Brown4be44fc2005-08-05 00:44:28 -0400333 acpi_ex_exit_interpreter();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Len Brown4be44fc2005-08-05 00:44:28 -0400335 status = region_setup(region_obj, ACPI_REGION_ACTIVATE,
336 handler_desc->address_space.context,
337 &region_context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 /* Re-enter the interpreter */
340
Len Brown4be44fc2005-08-05 00:44:28 -0400341 status2 = acpi_ex_enter_interpreter();
342 if (ACPI_FAILURE(status2)) {
343 return_ACPI_STATUS(status2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 }
345
346 /* Check for failure of the Region Setup */
347
Len Brown4be44fc2005-08-05 00:44:28 -0400348 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500349 ACPI_EXCEPTION((AE_INFO, status,
350 "During region initialization: [%s]",
351 acpi_ut_get_region_name(region_obj->
352 region.
353 space_id)));
Len Brown4be44fc2005-08-05 00:44:28 -0400354 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 }
356
357 /*
358 * Region initialization may have been completed by region_setup
359 */
360 if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) {
361 region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE;
362
363 if (region_obj2->extra.region_context) {
364 /* The handler for this region was already installed */
365
Len Brown4be44fc2005-08-05 00:44:28 -0400366 ACPI_MEM_FREE(region_context);
367 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /*
369 * Save the returned context for use in all accesses to
370 * this particular region
371 */
Len Brown4be44fc2005-08-05 00:44:28 -0400372 region_obj2->extra.region_context =
373 region_context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375 }
376 }
377
378 /* We have everything we need, we can invoke the address space handler */
379
380 handler = handler_desc->address_space.handler;
381
Len Brown4be44fc2005-08-05 00:44:28 -0400382 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
383 "Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
384 &region_obj->region.handler->address_space, handler,
385 ACPI_FORMAT_UINT64(address),
386 acpi_ut_get_region_name(region_obj->region.
387 space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Len Brown4be44fc2005-08-05 00:44:28 -0400389 if (!
390 (handler_desc->address_space.
391 hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 /*
393 * For handlers other than the default (supplied) handlers, we must
394 * exit the interpreter because the handler *might* block -- we don't
395 * know what it will do, so we can't hold the lock on the intepreter.
396 */
397 acpi_ex_exit_interpreter();
398 }
399
400 /* Call the handler */
401
Len Brown4be44fc2005-08-05 00:44:28 -0400402 status = handler(function, address, bit_width, value,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 handler_desc->address_space.context,
404 region_obj2->extra.region_context);
405
Len Brown4be44fc2005-08-05 00:44:28 -0400406 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500407 ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]",
408 acpi_ut_get_region_name(region_obj->region.
409 space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 }
411
Len Brown4be44fc2005-08-05 00:44:28 -0400412 if (!
413 (handler_desc->address_space.
414 hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 /*
416 * We just returned from a non-default handler, we must re-enter the
417 * interpreter
418 */
Len Brown4be44fc2005-08-05 00:44:28 -0400419 status2 = acpi_ex_enter_interpreter();
420 if (ACPI_FAILURE(status2)) {
421 return_ACPI_STATUS(status2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 }
423 }
424
Len Brown4be44fc2005-08-05 00:44:28 -0400425 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426}
427
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428/*******************************************************************************
429 *
430 * FUNCTION: acpi_ev_detach_region
431 *
432 * PARAMETERS: region_obj - Region Object
433 * acpi_ns_is_locked - Namespace Region Already Locked?
434 *
435 * RETURN: None
436 *
437 * DESCRIPTION: Break the association between the handler and the region
438 * this is a two way association.
439 *
440 ******************************************************************************/
441
442void
Len Brown4be44fc2005-08-05 00:44:28 -0400443acpi_ev_detach_region(union acpi_operand_object *region_obj,
444 u8 acpi_ns_is_locked)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
Len Brown4be44fc2005-08-05 00:44:28 -0400446 union acpi_operand_object *handler_obj;
447 union acpi_operand_object *obj_desc;
448 union acpi_operand_object **last_obj_ptr;
449 acpi_adr_space_setup region_setup;
450 void **region_context;
451 union acpi_operand_object *region_obj2;
452 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Len Brown4be44fc2005-08-05 00:44:28 -0400454 ACPI_FUNCTION_TRACE("ev_detach_region");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Len Brown4be44fc2005-08-05 00:44:28 -0400456 region_obj2 = acpi_ns_get_secondary_object(region_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 if (!region_obj2) {
458 return_VOID;
459 }
460 region_context = &region_obj2->extra.region_context;
461
462 /* Get the address handler from the region object */
463
464 handler_obj = region_obj->region.handler;
465 if (!handler_obj) {
466 /* This region has no handler, all done */
467
468 return_VOID;
469 }
470
471 /* Find this region in the handler's list */
472
473 obj_desc = handler_obj->address_space.region_list;
474 last_obj_ptr = &handler_obj->address_space.region_list;
475
476 while (obj_desc) {
477 /* Is this the correct Region? */
478
479 if (obj_desc == region_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400480 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
481 "Removing Region %p from address handler %p\n",
482 region_obj, handler_obj));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484 /* This is it, remove it from the handler's list */
485
486 *last_obj_ptr = obj_desc->region.next;
Len Brown4be44fc2005-08-05 00:44:28 -0400487 obj_desc->region.next = NULL; /* Must clear field */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489 if (acpi_ns_is_locked) {
Len Brown4be44fc2005-08-05 00:44:28 -0400490 status =
491 acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
492 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 return_VOID;
494 }
495 }
496
497 /* Now stop region accesses by executing the _REG method */
498
Len Brown4be44fc2005-08-05 00:44:28 -0400499 status = acpi_ev_execute_reg_method(region_obj, 0);
500 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500501 ACPI_EXCEPTION((AE_INFO, status,
502 "from region _REG, [%s]",
503 acpi_ut_get_region_name
504 (region_obj->region.space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
506
507 if (acpi_ns_is_locked) {
Len Brown4be44fc2005-08-05 00:44:28 -0400508 status =
509 acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
510 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return_VOID;
512 }
513 }
514
515 /* Call the setup handler with the deactivate notification */
516
517 region_setup = handler_obj->address_space.setup;
Len Brown4be44fc2005-08-05 00:44:28 -0400518 status =
519 region_setup(region_obj, ACPI_REGION_DEACTIVATE,
520 handler_obj->address_space.context,
521 region_context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 /* Init routine may fail, Just ignore errors */
524
Len Brown4be44fc2005-08-05 00:44:28 -0400525 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500526 ACPI_EXCEPTION((AE_INFO, status,
527 "from region init, [%s]",
528 acpi_ut_get_region_name
529 (region_obj->region.space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 }
531
532 region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
533
534 /*
535 * Remove handler reference in the region
536 *
537 * NOTE: this doesn't mean that the region goes away
538 * The region is just inaccessible as indicated to
539 * the _REG method
540 *
541 * If the region is on the handler's list
542 * this better be the region's handler
543 */
544 region_obj->region.handler = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400545 acpi_ut_remove_reference(handler_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 return_VOID;
548 }
549
550 /* Walk the linked list of handlers */
551
552 last_obj_ptr = &obj_desc->region.next;
553 obj_desc = obj_desc->region.next;
554 }
555
556 /* If we get here, the region was not in the handler's region list */
557
Len Brown4be44fc2005-08-05 00:44:28 -0400558 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
559 "Cannot remove region %p from address handler %p\n",
560 region_obj, handler_obj));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562 return_VOID;
563}
564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565/*******************************************************************************
566 *
567 * FUNCTION: acpi_ev_attach_region
568 *
569 * PARAMETERS: handler_obj - Handler Object
570 * region_obj - Region Object
571 * acpi_ns_is_locked - Namespace Region Already Locked?
572 *
573 * RETURN: None
574 *
575 * DESCRIPTION: Create the association between the handler and the region
576 * this is a two way association.
577 *
578 ******************************************************************************/
579
580acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400581acpi_ev_attach_region(union acpi_operand_object *handler_obj,
582 union acpi_operand_object *region_obj,
583 u8 acpi_ns_is_locked)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584{
585
Len Brown4be44fc2005-08-05 00:44:28 -0400586 ACPI_FUNCTION_TRACE("ev_attach_region");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Len Brown4be44fc2005-08-05 00:44:28 -0400588 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
589 "Adding Region [%4.4s] %p to address handler %p [%s]\n",
590 acpi_ut_get_node_name(region_obj->region.node),
591 region_obj, handler_obj,
592 acpi_ut_get_region_name(region_obj->region.
593 space_id)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
595 /* Link this region to the front of the handler's list */
596
597 region_obj->region.next = handler_obj->address_space.region_list;
598 handler_obj->address_space.region_list = region_obj;
599
600 /* Install the region's handler */
601
602 if (region_obj->region.handler) {
Len Brown4be44fc2005-08-05 00:44:28 -0400603 return_ACPI_STATUS(AE_ALREADY_EXISTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 }
605
606 region_obj->region.handler = handler_obj;
Len Brown4be44fc2005-08-05 00:44:28 -0400607 acpi_ut_add_reference(handler_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Len Brown4be44fc2005-08-05 00:44:28 -0400609 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610}
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612/*******************************************************************************
613 *
614 * FUNCTION: acpi_ev_install_handler
615 *
616 * PARAMETERS: walk_namespace callback
617 *
618 * DESCRIPTION: This routine installs an address handler into objects that are
619 * of type Region or Device.
620 *
621 * If the Object is a Device, and the device has a handler of
622 * the same type then the search is terminated in that branch.
623 *
624 * This is because the existing handler is closer in proximity
625 * to any more regions than the one we are trying to install.
626 *
627 ******************************************************************************/
628
Robert Moore44f6c012005-04-18 22:49:35 -0400629static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400630acpi_ev_install_handler(acpi_handle obj_handle,
631 u32 level, void *context, void **return_value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632{
Len Brown4be44fc2005-08-05 00:44:28 -0400633 union acpi_operand_object *handler_obj;
634 union acpi_operand_object *next_handler_obj;
635 union acpi_operand_object *obj_desc;
636 struct acpi_namespace_node *node;
637 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Len Brown4be44fc2005-08-05 00:44:28 -0400639 ACPI_FUNCTION_NAME("ev_install_handler");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Len Brown4be44fc2005-08-05 00:44:28 -0400641 handler_obj = (union acpi_operand_object *)context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643 /* Parameter validation */
644
645 if (!handler_obj) {
646 return (AE_OK);
647 }
648
649 /* Convert and validate the device handle */
650
Len Brown4be44fc2005-08-05 00:44:28 -0400651 node = acpi_ns_map_handle_to_node(obj_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 if (!node) {
653 return (AE_BAD_PARAMETER);
654 }
655
656 /*
657 * We only care about regions.and objects
658 * that are allowed to have address space handlers
659 */
660 if ((node->type != ACPI_TYPE_DEVICE) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400661 (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return (AE_OK);
663 }
664
665 /* Check for an existing internal object */
666
Len Brown4be44fc2005-08-05 00:44:28 -0400667 obj_desc = acpi_ns_get_attached_object(node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (!obj_desc) {
669 /* No object, just exit */
670
671 return (AE_OK);
672 }
673
674 /* Devices are handled different than regions */
675
Len Brown4be44fc2005-08-05 00:44:28 -0400676 if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 /* Check if this Device already has a handler for this address space */
678
679 next_handler_obj = obj_desc->device.handler;
680 while (next_handler_obj) {
681 /* Found a handler, is it for the same address space? */
682
Len Brown4be44fc2005-08-05 00:44:28 -0400683 if (next_handler_obj->address_space.space_id ==
684 handler_obj->address_space.space_id) {
685 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
686 "Found handler for region [%s] in device %p(%p) handler %p\n",
687 acpi_ut_get_region_name
688 (handler_obj->address_space.
689 space_id), obj_desc,
690 next_handler_obj,
691 handler_obj));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693 /*
694 * Since the object we found it on was a device, then it
695 * means that someone has already installed a handler for
696 * the branch of the namespace from this device on. Just
697 * bail out telling the walk routine to not traverse this
698 * branch. This preserves the scoping rule for handlers.
699 */
700 return (AE_CTRL_DEPTH);
701 }
702
703 /* Walk the linked list of handlers attached to this device */
704
705 next_handler_obj = next_handler_obj->address_space.next;
706 }
707
708 /*
709 * As long as the device didn't have a handler for this
710 * space we don't care about it. We just ignore it and
711 * proceed.
712 */
713 return (AE_OK);
714 }
715
716 /* Object is a Region */
717
718 if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
719 /*
720 * This region is for a different address space
721 * -- just ignore it
722 */
723 return (AE_OK);
724 }
725
726 /*
727 * Now we have a region and it is for the handler's address
728 * space type.
729 *
730 * First disconnect region for any previous handler (if any)
731 */
Len Brown4be44fc2005-08-05 00:44:28 -0400732 acpi_ev_detach_region(obj_desc, FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
734 /* Connect the region to the new handler */
735
Len Brown4be44fc2005-08-05 00:44:28 -0400736 status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 return (status);
738}
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740/*******************************************************************************
741 *
742 * FUNCTION: acpi_ev_install_space_handler
743 *
744 * PARAMETERS: Node - Namespace node for the device
745 * space_id - The address space ID
746 * Handler - Address of the handler
747 * Setup - Address of the setup function
748 * Context - Value passed to the handler on each access
749 *
750 * RETURN: Status
751 *
752 * DESCRIPTION: Install a handler for all op_regions of a given space_id.
753 * Assumes namespace is locked
754 *
755 ******************************************************************************/
756
757acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400758acpi_ev_install_space_handler(struct acpi_namespace_node * node,
759 acpi_adr_space_type space_id,
760 acpi_adr_space_handler handler,
761 acpi_adr_space_setup setup, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762{
Len Brown4be44fc2005-08-05 00:44:28 -0400763 union acpi_operand_object *obj_desc;
764 union acpi_operand_object *handler_obj;
765 acpi_status status;
766 acpi_object_type type;
767 u16 flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
Len Brown4be44fc2005-08-05 00:44:28 -0400769 ACPI_FUNCTION_TRACE("ev_install_space_handler");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771 /*
772 * This registration is valid for only the types below
773 * and the root. This is where the default handlers
774 * get placed.
775 */
Len Brown4be44fc2005-08-05 00:44:28 -0400776 if ((node->type != ACPI_TYPE_DEVICE) &&
777 (node->type != ACPI_TYPE_PROCESSOR) &&
778 (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 status = AE_BAD_PARAMETER;
780 goto unlock_and_exit;
781 }
782
783 if (handler == ACPI_DEFAULT_HANDLER) {
784 flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
785
786 switch (space_id) {
787 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
788 handler = acpi_ex_system_memory_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400789 setup = acpi_ev_system_memory_region_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 break;
791
792 case ACPI_ADR_SPACE_SYSTEM_IO:
793 handler = acpi_ex_system_io_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400794 setup = acpi_ev_io_space_region_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 break;
796
797 case ACPI_ADR_SPACE_PCI_CONFIG:
798 handler = acpi_ex_pci_config_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400799 setup = acpi_ev_pci_config_region_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 break;
801
802 case ACPI_ADR_SPACE_CMOS:
803 handler = acpi_ex_cmos_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400804 setup = acpi_ev_cmos_region_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 break;
806
807 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
808 handler = acpi_ex_pci_bar_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400809 setup = acpi_ev_pci_bar_region_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 break;
811
812 case ACPI_ADR_SPACE_DATA_TABLE:
813 handler = acpi_ex_data_table_space_handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400814 setup = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 break;
816
817 default:
818 status = AE_BAD_PARAMETER;
819 goto unlock_and_exit;
820 }
821 }
822
823 /* If the caller hasn't specified a setup routine, use the default */
824
825 if (!setup) {
826 setup = acpi_ev_default_region_setup;
827 }
828
829 /* Check for an existing internal object */
830
Len Brown4be44fc2005-08-05 00:44:28 -0400831 obj_desc = acpi_ns_get_attached_object(node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 if (obj_desc) {
833 /*
834 * The attached device object already exists.
835 * Make sure the handler is not already installed.
836 */
837 handler_obj = obj_desc->device.handler;
838
839 /* Walk the handler list for this device */
840
841 while (handler_obj) {
842 /* Same space_id indicates a handler already installed */
843
844 if (handler_obj->address_space.space_id == space_id) {
Len Brown4be44fc2005-08-05 00:44:28 -0400845 if (handler_obj->address_space.handler ==
846 handler) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 /*
848 * It is (relatively) OK to attempt to install the SAME
Robert Moore44f6c012005-04-18 22:49:35 -0400849 * handler twice. This can easily happen
850 * with PCI_Config space.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 */
852 status = AE_SAME_HANDLER;
853 goto unlock_and_exit;
Len Brown4be44fc2005-08-05 00:44:28 -0400854 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 /* A handler is already installed */
856
857 status = AE_ALREADY_EXISTS;
858 }
859 goto unlock_and_exit;
860 }
861
862 /* Walk the linked list of handlers */
863
864 handler_obj = handler_obj->address_space.next;
865 }
Len Brown4be44fc2005-08-05 00:44:28 -0400866 } else {
867 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
868 "Creating object on Device %p while installing handler\n",
869 node));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
871 /* obj_desc does not exist, create one */
872
873 if (node->type == ACPI_TYPE_ANY) {
874 type = ACPI_TYPE_DEVICE;
Len Brown4be44fc2005-08-05 00:44:28 -0400875 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 type = node->type;
877 }
878
Len Brown4be44fc2005-08-05 00:44:28 -0400879 obj_desc = acpi_ut_create_internal_object(type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 if (!obj_desc) {
881 status = AE_NO_MEMORY;
882 goto unlock_and_exit;
883 }
884
885 /* Init new descriptor */
886
887 obj_desc->common.type = (u8) type;
888
889 /* Attach the new object to the Node */
890
Len Brown4be44fc2005-08-05 00:44:28 -0400891 status = acpi_ns_attach_object(node, obj_desc, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
893 /* Remove local reference to the object */
894
Len Brown4be44fc2005-08-05 00:44:28 -0400895 acpi_ut_remove_reference(obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
Len Brown4be44fc2005-08-05 00:44:28 -0400897 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 goto unlock_and_exit;
899 }
900 }
901
Len Brown4be44fc2005-08-05 00:44:28 -0400902 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
903 "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
904 acpi_ut_get_region_name(space_id), space_id,
905 acpi_ut_get_node_name(node), node, obj_desc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
907 /*
908 * Install the handler
909 *
910 * At this point there is no existing handler.
911 * Just allocate the object for the handler and link it
912 * into the list.
913 */
Len Brown4be44fc2005-08-05 00:44:28 -0400914 handler_obj =
915 acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 if (!handler_obj) {
917 status = AE_NO_MEMORY;
918 goto unlock_and_exit;
919 }
920
921 /* Init handler obj */
922
Len Brown4be44fc2005-08-05 00:44:28 -0400923 handler_obj->address_space.space_id = (u8) space_id;
924 handler_obj->address_space.hflags = flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 handler_obj->address_space.region_list = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400926 handler_obj->address_space.node = node;
927 handler_obj->address_space.handler = handler;
928 handler_obj->address_space.context = context;
929 handler_obj->address_space.setup = setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931 /* Install at head of Device.address_space list */
932
Len Brown4be44fc2005-08-05 00:44:28 -0400933 handler_obj->address_space.next = obj_desc->device.handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
935 /*
936 * The Device object is the first reference on the handler_obj.
937 * Each region that uses the handler adds a reference.
938 */
939 obj_desc->device.handler = handler_obj;
940
941 /*
942 * Walk the namespace finding all of the regions this
943 * handler will manage.
944 *
945 * Start at the device and search the branch toward
946 * the leaf nodes until either the leaf is encountered or
947 * a device is detected that has an address handler of the
948 * same type.
949 *
950 * In either case, back up and search down the remainder
951 * of the branch
952 */
Len Brown4be44fc2005-08-05 00:44:28 -0400953 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
954 ACPI_NS_WALK_UNLOCK,
955 acpi_ev_install_handler, handler_obj,
956 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
Len Brown4be44fc2005-08-05 00:44:28 -0400958 unlock_and_exit:
959 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960}
961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962/*******************************************************************************
963 *
964 * FUNCTION: acpi_ev_execute_reg_methods
965 *
966 * PARAMETERS: Node - Namespace node for the device
967 * space_id - The address space ID
968 *
969 * RETURN: Status
970 *
971 * DESCRIPTION: Run all _REG methods for the input Space ID;
972 * Note: assumes namespace is locked, or system init time.
973 *
974 ******************************************************************************/
975
976acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400977acpi_ev_execute_reg_methods(struct acpi_namespace_node *node,
978 acpi_adr_space_type space_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979{
Len Brown4be44fc2005-08-05 00:44:28 -0400980 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
Len Brown4be44fc2005-08-05 00:44:28 -0400982 ACPI_FUNCTION_TRACE("ev_execute_reg_methods");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984 /*
985 * Run all _REG methods for all Operation Regions for this
986 * space ID. This is a separate walk in order to handle any
987 * interdependencies between regions and _REG methods. (i.e. handlers
988 * must be installed for all regions of this Space ID before we
989 * can run any _REG methods)
990 */
Len Brown4be44fc2005-08-05 00:44:28 -0400991 status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
992 ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run,
993 &space_id, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Len Brown4be44fc2005-08-05 00:44:28 -0400995 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996}
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998/*******************************************************************************
999 *
1000 * FUNCTION: acpi_ev_reg_run
1001 *
1002 * PARAMETERS: walk_namespace callback
1003 *
1004 * DESCRIPTION: Run _REg method for region objects of the requested space_iD
1005 *
1006 ******************************************************************************/
1007
Robert Moore44f6c012005-04-18 22:49:35 -04001008static acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -04001009acpi_ev_reg_run(acpi_handle obj_handle,
1010 u32 level, void *context, void **return_value)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011{
Len Brown4be44fc2005-08-05 00:44:28 -04001012 union acpi_operand_object *obj_desc;
1013 struct acpi_namespace_node *node;
1014 acpi_adr_space_type space_id;
1015 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
Len Brown4be44fc2005-08-05 00:44:28 -04001017 space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
1019 /* Convert and validate the device handle */
1020
Len Brown4be44fc2005-08-05 00:44:28 -04001021 node = acpi_ns_map_handle_to_node(obj_handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 if (!node) {
1023 return (AE_BAD_PARAMETER);
1024 }
1025
1026 /*
1027 * We only care about regions.and objects
1028 * that are allowed to have address space handlers
1029 */
Len Brown4be44fc2005-08-05 00:44:28 -04001030 if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 return (AE_OK);
1032 }
1033
1034 /* Check for an existing internal object */
1035
Len Brown4be44fc2005-08-05 00:44:28 -04001036 obj_desc = acpi_ns_get_attached_object(node);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 if (!obj_desc) {
1038 /* No object, just exit */
1039
1040 return (AE_OK);
1041 }
1042
1043 /* Object is a Region */
1044
1045 if (obj_desc->region.space_id != space_id) {
1046 /*
1047 * This region is for a different address space
1048 * -- just ignore it
1049 */
1050 return (AE_OK);
1051 }
1052
Len Brown4be44fc2005-08-05 00:44:28 -04001053 status = acpi_ev_execute_reg_method(obj_desc, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 return (status);
1055}