blob: da323390bb70688a8361b8c3022b76641a05fa54 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: evrgnini- ACPI address_space (op_region) init
4 *
5 *****************************************************************************/
6
7/*
David E. Box82a80942015-02-05 15:20:45 +08008 * Copyright (C) 2000 - 2015, Intel Corp.
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>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040050ACPI_MODULE_NAME("evrgnini")
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Bob Mooreb7a69802007-02-02 19:48:21 +030052/* Local prototypes */
Bob Mooreb7a69802007-02-02 19:48:21 +030053static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/*******************************************************************************
56 *
57 * FUNCTION: acpi_ev_system_memory_region_setup
58 *
Bob Mooreba494be2012-07-12 09:40:10 +080059 * PARAMETERS: handle - Region we are interested in
60 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 * handler_context - Address space handler context
62 * region_context - Region specific context
63 *
64 * RETURN: Status
65 *
Robert Moore44f6c012005-04-18 22:49:35 -040066 * DESCRIPTION: Setup a system_memory operation region
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 *
68 ******************************************************************************/
Bob Mooreb7a69802007-02-02 19:48:21 +030069
Linus Torvalds1da177e2005-04-16 15:20:36 -070070acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040071acpi_ev_system_memory_region_setup(acpi_handle handle,
72 u32 function,
73 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Len Brown4be44fc2005-08-05 00:44:28 -040075 union acpi_operand_object *region_desc =
76 (union acpi_operand_object *)handle;
77 struct acpi_mem_space_context *local_region_context;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Bob Mooreb229cf92006-04-21 17:15:00 -040079 ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81 if (function == ACPI_REGION_DEACTIVATE) {
82 if (*region_context) {
Bob Moore793c2382006-03-31 00:00:00 -050083 local_region_context =
84 (struct acpi_mem_space_context *)*region_context;
85
86 /* Delete a cached mapping if present */
87
88 if (local_region_context->mapped_length) {
89 acpi_os_unmap_memory(local_region_context->
90 mapped_logical_address,
91 local_region_context->
92 mapped_length);
93 }
94 ACPI_FREE(local_region_context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 *region_context = NULL;
96 }
Len Brown4be44fc2005-08-05 00:44:28 -040097 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 }
99
100 /* Create a new context */
101
Len Brown4be44fc2005-08-05 00:44:28 -0400102 local_region_context =
Bob Moore83135242006-10-03 00:00:00 -0400103 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (!(local_region_context)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400105 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 }
107
108 /* Save the region length and address for use in the handler */
109
110 local_region_context->length = region_desc->region.length;
111 local_region_context->address = region_desc->region.address;
112
113 *region_context = local_region_context;
Len Brown4be44fc2005-08-05 00:44:28 -0400114 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115}
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117/*******************************************************************************
118 *
119 * FUNCTION: acpi_ev_io_space_region_setup
120 *
Bob Mooreba494be2012-07-12 09:40:10 +0800121 * PARAMETERS: handle - Region we are interested in
122 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 * handler_context - Address space handler context
124 * region_context - Region specific context
125 *
126 * RETURN: Status
127 *
Robert Moore44f6c012005-04-18 22:49:35 -0400128 * DESCRIPTION: Setup a IO operation region
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 *
130 ******************************************************************************/
131
132acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400133acpi_ev_io_space_region_setup(acpi_handle handle,
134 u32 function,
135 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
Bob Mooreb229cf92006-04-21 17:15:00 -0400137 ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 if (function == ACPI_REGION_DEACTIVATE) {
140 *region_context = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400141 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 *region_context = handler_context;
143 }
144
Len Brown4be44fc2005-08-05 00:44:28 -0400145 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148/*******************************************************************************
149 *
150 * FUNCTION: acpi_ev_pci_config_region_setup
151 *
Bob Mooreba494be2012-07-12 09:40:10 +0800152 * PARAMETERS: handle - Region we are interested in
153 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 * handler_context - Address space handler context
155 * region_context - Region specific context
156 *
157 * RETURN: Status
158 *
Robert Moore44f6c012005-04-18 22:49:35 -0400159 * DESCRIPTION: Setup a PCI_Config operation region
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 *
161 * MUTEX: Assumes namespace is not locked
162 *
163 ******************************************************************************/
164
165acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400166acpi_ev_pci_config_region_setup(acpi_handle handle,
167 u32 function,
168 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
Len Brown4be44fc2005-08-05 00:44:28 -0400170 acpi_status status = AE_OK;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800171 u64 pci_value;
Len Brown4be44fc2005-08-05 00:44:28 -0400172 struct acpi_pci_id *pci_id = *region_context;
173 union acpi_operand_object *handler_obj;
174 struct acpi_namespace_node *parent_node;
175 struct acpi_namespace_node *pci_root_node;
Bob Mooreb7a69802007-02-02 19:48:21 +0300176 struct acpi_namespace_node *pci_device_node;
Len Brown4be44fc2005-08-05 00:44:28 -0400177 union acpi_operand_object *region_obj =
178 (union acpi_operand_object *)handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Bob Mooreb229cf92006-04-21 17:15:00 -0400180 ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 handler_obj = region_obj->region.handler;
183 if (!handler_obj) {
184 /*
185 * No installed handler. This shouldn't happen because the dispatch
186 * routine checks before we get here, but we check again just in case.
187 */
Len Brown4be44fc2005-08-05 00:44:28 -0400188 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
189 "Attempting to init a region %p, with no handler\n",
190 region_obj));
191 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
193
194 *region_context = NULL;
195 if (function == ACPI_REGION_DEACTIVATE) {
196 if (pci_id) {
Bob Moore83135242006-10-03 00:00:00 -0400197 ACPI_FREE(pci_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 }
Len Brown4be44fc2005-08-05 00:44:28 -0400199 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 }
201
Alexey Starikovskiyc45b5c02010-05-26 11:53:07 +0800202 parent_node = region_obj->region.node->parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204 /*
205 * Get the _SEG and _BBN values from the device upon which the handler
206 * is installed.
207 *
208 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
209 * This is the device the handler has been registered to handle.
210 */
211
212 /*
213 * If the address_space.Node is still pointing to the root, we need
214 * to scan upward for a PCI Root bridge and re-associate the op_region
215 * handlers with that device.
216 */
217 if (handler_obj->address_space.node == acpi_gbl_root_node) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* Start search from the parent object */
220
221 pci_root_node = parent_node;
222 while (pci_root_node != acpi_gbl_root_node) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400223
Bob Mooreb7a69802007-02-02 19:48:21 +0300224 /* Get the _HID/_CID in order to detect a root_bridge */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Bob Mooreb7a69802007-02-02 19:48:21 +0300226 if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
227
228 /* Install a handler for this PCI root bridge */
229
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000230 status = acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
Bob Mooreb7a69802007-02-02 19:48:21 +0300231 if (ACPI_FAILURE(status)) {
232 if (status == AE_SAME_HANDLER) {
233 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800234 * It is OK if the handler is already installed on the
235 * root bridge. Still need to return a context object
236 * for the new PCI_Config operation region, however.
Bob Mooreb7a69802007-02-02 19:48:21 +0300237 */
238 status = AE_OK;
239 } else {
240 ACPI_EXCEPTION((AE_INFO, status,
Bob Moored4913dc2009-03-06 10:05:18 +0800241 "Could not install PciConfig handler "
242 "for Root Bridge %4.4s",
Bob Mooreb7a69802007-02-02 19:48:21 +0300243 acpi_ut_get_node_name
244 (pci_root_node)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 }
Bob Mooreb7a69802007-02-02 19:48:21 +0300247 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 }
249
Alexey Starikovskiyc45b5c02010-05-26 11:53:07 +0800250 pci_root_node = pci_root_node->parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
252
253 /* PCI root bridge not found, use namespace root node */
Len Brown4be44fc2005-08-05 00:44:28 -0400254 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 pci_root_node = handler_obj->address_space.node;
256 }
257
258 /*
259 * If this region is now initialized, we are done.
260 * (install_address_space_handler could have initialized it)
261 */
262 if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
Len Brown4be44fc2005-08-05 00:44:28 -0400263 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
265
266 /* Region is still not initialized. Create a new context */
267
Bob Moore83135242006-10-03 00:00:00 -0400268 pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 if (!pci_id) {
Len Brown4be44fc2005-08-05 00:44:28 -0400270 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 }
272
273 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800274 * For PCI_Config space access, we need the segment, bus, device and
275 * function numbers. Acquire them here.
Bob Mooreb7a69802007-02-02 19:48:21 +0300276 *
277 * Find the parent device object. (This allows the operation region to be
278 * within a subscope under the device, such as a control method.)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 */
Bob Mooreb7a69802007-02-02 19:48:21 +0300280 pci_device_node = region_obj->region.node;
281 while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
Alexey Starikovskiyc45b5c02010-05-26 11:53:07 +0800282 pci_device_node = pci_device_node->parent;
Bob Mooreb7a69802007-02-02 19:48:21 +0300283 }
284
285 if (!pci_device_node) {
Jesper Juhle6917312007-07-19 00:48:03 +0200286 ACPI_FREE(pci_id);
Bob Mooreb7a69802007-02-02 19:48:21 +0300287 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
288 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 /*
Bob Moore95abccb2010-09-15 13:22:46 +0800291 * Get the PCI device and function numbers from the _ADR object
292 * contained in the parent's scope.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 */
Bob Moored4913dc2009-03-06 10:05:18 +0800294 status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR,
295 pci_device_node, &pci_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800298 * The default is zero, and since the allocation above zeroed the data,
299 * just do nothing on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 */
Len Brown4be44fc2005-08-05 00:44:28 -0400301 if (ACPI_SUCCESS(status)) {
302 pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
303 pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305
306 /* The PCI segment number comes from the _SEG method */
307
Bob Moored4913dc2009-03-06 10:05:18 +0800308 status = acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG,
309 pci_root_node, &pci_value);
Len Brown4be44fc2005-08-05 00:44:28 -0400310 if (ACPI_SUCCESS(status)) {
311 pci_id->segment = ACPI_LOWORD(pci_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 }
313
314 /* The PCI bus number comes from the _BBN method */
315
Bob Moored4913dc2009-03-06 10:05:18 +0800316 status = acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN,
317 pci_root_node, &pci_value);
Len Brown4be44fc2005-08-05 00:44:28 -0400318 if (ACPI_SUCCESS(status)) {
319 pci_id->bus = ACPI_LOWORD(pci_value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 }
321
Bob Moore95abccb2010-09-15 13:22:46 +0800322 /* Complete/update the PCI ID for this device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Bob Moore95abccb2010-09-15 13:22:46 +0800324 status =
325 acpi_hw_derive_pci_id(pci_id, pci_root_node,
326 region_obj->region.node);
327 if (ACPI_FAILURE(status)) {
328 ACPI_FREE(pci_id);
329 return_ACPI_STATUS(status);
330 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 *region_context = pci_id;
Len Brown4be44fc2005-08-05 00:44:28 -0400333 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334}
335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336/*******************************************************************************
337 *
Bob Mooreb7a69802007-02-02 19:48:21 +0300338 * FUNCTION: acpi_ev_is_pci_root_bridge
339 *
Bob Mooreba494be2012-07-12 09:40:10 +0800340 * PARAMETERS: node - Device node being examined
Bob Mooreb7a69802007-02-02 19:48:21 +0300341 *
342 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
343 *
344 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
345 * examining the _HID and _CID for the device.
346 *
347 ******************************************************************************/
348
349static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
350{
351 acpi_status status;
Lv Zheng78e25fe2012-10-31 02:25:24 +0000352 struct acpi_pnp_device_id *hid;
353 struct acpi_pnp_device_id_list *cid;
Bob Moore67a119f2008-06-10 13:42:13 +0800354 u32 i;
Bob Moore15b8dd52009-06-29 13:39:29 +0800355 u8 match;
Bob Mooreb7a69802007-02-02 19:48:21 +0300356
Bob Moore9f15fc62008-11-12 16:01:56 +0800357 /* Get the _HID and check for a PCI Root Bridge */
358
Bob Mooreb7a69802007-02-02 19:48:21 +0300359 status = acpi_ut_execute_HID(node, &hid);
360 if (ACPI_FAILURE(status)) {
361 return (FALSE);
362 }
363
Bob Moore15b8dd52009-06-29 13:39:29 +0800364 match = acpi_ut_is_pci_root_bridge(hid->string);
365 ACPI_FREE(hid);
366
367 if (match) {
Bob Mooreb7a69802007-02-02 19:48:21 +0300368 return (TRUE);
369 }
370
Bob Moore9f15fc62008-11-12 16:01:56 +0800371 /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
372
Bob Mooreb7a69802007-02-02 19:48:21 +0300373 status = acpi_ut_execute_CID(node, &cid);
374 if (ACPI_FAILURE(status)) {
375 return (FALSE);
376 }
377
378 /* Check all _CIDs in the returned list */
379
380 for (i = 0; i < cid->count; i++) {
Bob Moore15b8dd52009-06-29 13:39:29 +0800381 if (acpi_ut_is_pci_root_bridge(cid->ids[i].string)) {
Bob Mooreb7a69802007-02-02 19:48:21 +0300382 ACPI_FREE(cid);
383 return (TRUE);
384 }
385 }
386
387 ACPI_FREE(cid);
388 return (FALSE);
389}
390
391/*******************************************************************************
392 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 * FUNCTION: acpi_ev_pci_bar_region_setup
394 *
Bob Mooreba494be2012-07-12 09:40:10 +0800395 * PARAMETERS: handle - Region we are interested in
396 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 * handler_context - Address space handler context
398 * region_context - Region specific context
399 *
400 * RETURN: Status
401 *
Bob Mooreba494be2012-07-12 09:40:10 +0800402 * DESCRIPTION: Setup a pci_BAR operation region
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 *
404 * MUTEX: Assumes namespace is not locked
405 *
406 ******************************************************************************/
407
408acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400409acpi_ev_pci_bar_region_setup(acpi_handle handle,
410 u32 function,
411 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412{
Bob Mooreb229cf92006-04-21 17:15:00 -0400413 ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Len Brown4be44fc2005-08-05 00:44:28 -0400415 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418/*******************************************************************************
419 *
420 * FUNCTION: acpi_ev_cmos_region_setup
421 *
Bob Mooreba494be2012-07-12 09:40:10 +0800422 * PARAMETERS: handle - Region we are interested in
423 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 * handler_context - Address space handler context
425 * region_context - Region specific context
426 *
427 * RETURN: Status
428 *
Robert Moore44f6c012005-04-18 22:49:35 -0400429 * DESCRIPTION: Setup a CMOS operation region
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 *
431 * MUTEX: Assumes namespace is not locked
432 *
433 ******************************************************************************/
434
435acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400436acpi_ev_cmos_region_setup(acpi_handle handle,
437 u32 function,
438 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439{
Bob Mooreb229cf92006-04-21 17:15:00 -0400440 ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Len Brown4be44fc2005-08-05 00:44:28 -0400442 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443}
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445/*******************************************************************************
446 *
447 * FUNCTION: acpi_ev_default_region_setup
448 *
Bob Mooreba494be2012-07-12 09:40:10 +0800449 * PARAMETERS: handle - Region we are interested in
450 * function - Start or stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 * handler_context - Address space handler context
452 * region_context - Region specific context
453 *
454 * RETURN: Status
455 *
Robert Moore44f6c012005-04-18 22:49:35 -0400456 * DESCRIPTION: Default region initialization
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 *
458 ******************************************************************************/
459
460acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400461acpi_ev_default_region_setup(acpi_handle handle,
462 u32 function,
463 void *handler_context, void **region_context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
Bob Mooreb229cf92006-04-21 17:15:00 -0400465 ACPI_FUNCTION_TRACE(ev_default_region_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
467 if (function == ACPI_REGION_DEACTIVATE) {
468 *region_context = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400469 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 *region_context = handler_context;
471 }
472
Len Brown4be44fc2005-08-05 00:44:28 -0400473 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474}
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476/*******************************************************************************
477 *
478 * FUNCTION: acpi_ev_initialize_region
479 *
480 * PARAMETERS: region_obj - Region we are initializing
481 * acpi_ns_locked - Is namespace locked?
482 *
483 * RETURN: Status
484 *
485 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
486 * for execution at a later time
487 *
488 * Get the appropriate address space handler for a newly
489 * created region.
490 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800491 * This also performs address space specific initialization. For
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 * example, PCI regions must have an _ADR object that contains
Bob Moore9f15fc62008-11-12 16:01:56 +0800493 * a PCI address in the scope of the definition. This address is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 * required to perform an access to PCI config space.
495 *
Bob Moorec9e3ba22007-02-02 19:48:18 +0300496 * MUTEX: Interpreter should be unlocked, because we may run the _REG
497 * method for this region.
498 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 ******************************************************************************/
500
501acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400502acpi_ev_initialize_region(union acpi_operand_object *region_obj,
503 u8 acpi_ns_locked)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504{
Len Brown4be44fc2005-08-05 00:44:28 -0400505 union acpi_operand_object *handler_obj;
506 union acpi_operand_object *obj_desc;
507 acpi_adr_space_type space_id;
508 struct acpi_namespace_node *node;
509 acpi_status status;
510 struct acpi_namespace_node *method_node;
511 acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG;
512 union acpi_operand_object *region_obj2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Bob Mooreb229cf92006-04-21 17:15:00 -0400514 ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516 if (!region_obj) {
Len Brown4be44fc2005-08-05 00:44:28 -0400517 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519
520 if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
Len Brown4be44fc2005-08-05 00:44:28 -0400521 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 }
523
Len Brown4be44fc2005-08-05 00:44:28 -0400524 region_obj2 = acpi_ns_get_secondary_object(region_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!region_obj2) {
Len Brown4be44fc2005-08-05 00:44:28 -0400526 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 }
528
Alexey Starikovskiyc45b5c02010-05-26 11:53:07 +0800529 node = region_obj->region.node->parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 space_id = region_obj->region.space_id;
531
532 /* Setup defaults */
533
534 region_obj->region.handler = NULL;
535 region_obj2->extra.method_REG = NULL;
536 region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE);
537 region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
538
539 /* Find any "_REG" method associated with this region definition */
540
Bob Moore41195322006-05-26 16:36:00 -0400541 status =
542 acpi_ns_search_one_scope(*reg_name_ptr, node, ACPI_TYPE_METHOD,
543 &method_node);
Len Brown4be44fc2005-08-05 00:44:28 -0400544 if (ACPI_SUCCESS(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 /*
546 * The _REG method is optional and there can be only one per region
Bob Moore9f15fc62008-11-12 16:01:56 +0800547 * definition. This will be executed when the handler is attached
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 * or removed
549 */
550 region_obj2->extra.method_REG = method_node;
551 }
552
553 /*
554 * The following loop depends upon the root Node having no parent
555 * ie: acpi_gbl_root_node->parent_entry being set to NULL
556 */
557 while (node) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 /* Check to see if a handler exists */
560
561 handler_obj = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400562 obj_desc = acpi_ns_get_attached_object(node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (obj_desc) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 /* Can only be a handler if the object exists */
566
567 switch (node->type) {
568 case ACPI_TYPE_DEVICE:
569
570 handler_obj = obj_desc->device.handler;
571 break;
572
573 case ACPI_TYPE_PROCESSOR:
574
575 handler_obj = obj_desc->processor.handler;
576 break;
577
578 case ACPI_TYPE_THERMAL:
579
580 handler_obj = obj_desc->thermal_zone.handler;
581 break;
582
Lin Minge31c32c2009-12-11 15:28:27 +0800583 case ACPI_TYPE_METHOD:
584 /*
585 * If we are executing module level code, the original
586 * Node's object was replaced by this Method object and we
587 * saved the handler in the method object.
588 *
589 * See acpi_ns_exec_module_code
590 */
591 if (obj_desc->method.
Lin Ming26294842011-01-12 09:19:43 +0800592 info_flags & ACPI_METHOD_MODULE_LEVEL) {
Lin Minge31c32c2009-12-11 15:28:27 +0800593 handler_obj =
Lin Ming26294842011-01-12 09:19:43 +0800594 obj_desc->method.dispatch.handler;
Lin Minge31c32c2009-12-11 15:28:27 +0800595 }
596 break;
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 default:
Chao Guan1d1ea1b2013-06-08 00:58:14 +0000599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 /* Ignore other objects */
Chao Guan1d1ea1b2013-06-08 00:58:14 +0000601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 break;
603 }
604
605 while (handler_obj) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400606
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 /* Is this handler of the correct type? */
608
Len Brown4be44fc2005-08-05 00:44:28 -0400609 if (handler_obj->address_space.space_id ==
610 space_id) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 /* Found correct handler */
613
Len Brown4be44fc2005-08-05 00:44:28 -0400614 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
615 "Found handler %p for region %p in obj %p\n",
616 handler_obj,
617 region_obj,
618 obj_desc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Len Brown4be44fc2005-08-05 00:44:28 -0400620 status =
621 acpi_ev_attach_region(handler_obj,
622 region_obj,
623 acpi_ns_locked);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
625 /*
Bob Moored4913dc2009-03-06 10:05:18 +0800626 * Tell all users that this region is usable by
627 * running the _REG method
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 */
629 if (acpi_ns_locked) {
Len Brown4be44fc2005-08-05 00:44:28 -0400630 status =
631 acpi_ut_release_mutex
632 (ACPI_MTX_NAMESPACE);
633 if (ACPI_FAILURE(status)) {
634 return_ACPI_STATUS
635 (status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 }
637 }
638
Len Brown4be44fc2005-08-05 00:44:28 -0400639 status =
640 acpi_ev_execute_reg_method
Bob Mooree2066ca2011-04-13 13:22:04 +0800641 (region_obj, ACPI_REG_CONNECT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643 if (acpi_ns_locked) {
Len Brown4be44fc2005-08-05 00:44:28 -0400644 status =
645 acpi_ut_acquire_mutex
646 (ACPI_MTX_NAMESPACE);
647 if (ACPI_FAILURE(status)) {
648 return_ACPI_STATUS
649 (status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 }
651 }
652
Len Brown4be44fc2005-08-05 00:44:28 -0400653 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 }
655
656 /* Try next handler in the list */
657
658 handler_obj = handler_obj->address_space.next;
659 }
660 }
661
Bob Moore9f15fc62008-11-12 16:01:56 +0800662 /* This node does not have the handler we need; Pop up one level */
663
Alexey Starikovskiyc45b5c02010-05-26 11:53:07 +0800664 node = node->parent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 }
666
667 /* If we get here, there is no handler for this region */
668
Len Brown4be44fc2005-08-05 00:44:28 -0400669 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
Bob Mooreb229cf92006-04-21 17:15:00 -0400670 "No handler for RegionType %s(%X) (RegionObj %p)\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400671 acpi_ut_get_region_name(space_id), space_id,
672 region_obj));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
Len Brown4be44fc2005-08-05 00:44:28 -0400674 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675}