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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and | |
4 | * Address Spaces. | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
a8357b0c | 9 | * Copyright (C) 2000 - 2010, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acnamesp.h" | |
48 | #include "acevents.h" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 51 | ACPI_MODULE_NAME("evxfregn") |
1da177e4 LT |
52 | |
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_install_address_space_handler | |
56 | * | |
57 | * PARAMETERS: Device - Handle for the device | |
58 | * space_id - The address space ID | |
59 | * Handler - Address of the handler | |
60 | * Setup - Address of the setup function | |
61 | * Context - Value passed to the handler on each access | |
62 | * | |
63 | * RETURN: Status | |
64 | * | |
65 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
66 | * | |
67 | ******************************************************************************/ | |
1da177e4 | 68 | acpi_status |
4be44fcd LB |
69 | acpi_install_address_space_handler(acpi_handle device, |
70 | acpi_adr_space_type space_id, | |
71 | acpi_adr_space_handler handler, | |
72 | acpi_adr_space_setup setup, void *context) | |
1da177e4 | 73 | { |
4be44fcd LB |
74 | struct acpi_namespace_node *node; |
75 | acpi_status status; | |
1da177e4 | 76 | |
b229cf92 | 77 | ACPI_FUNCTION_TRACE(acpi_install_address_space_handler); |
1da177e4 LT |
78 | |
79 | /* Parameter validation */ | |
80 | ||
81 | if (!device) { | |
4be44fcd | 82 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
83 | } |
84 | ||
4be44fcd LB |
85 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
86 | if (ACPI_FAILURE(status)) { | |
87 | return_ACPI_STATUS(status); | |
1da177e4 LT |
88 | } |
89 | ||
90 | /* Convert and validate the device handle */ | |
91 | ||
f24b664d | 92 | node = acpi_ns_validate_handle(device); |
1da177e4 LT |
93 | if (!node) { |
94 | status = AE_BAD_PARAMETER; | |
95 | goto unlock_and_exit; | |
96 | } | |
97 | ||
98 | /* Install the handler for all Regions for this Space ID */ | |
99 | ||
4be44fcd LB |
100 | status = |
101 | acpi_ev_install_space_handler(node, space_id, handler, setup, | |
102 | context); | |
103 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
104 | goto unlock_and_exit; |
105 | } | |
106 | ||
107 | /* Run all _REG methods for this address space */ | |
108 | ||
4be44fcd | 109 | status = acpi_ev_execute_reg_methods(node, space_id); |
1da177e4 | 110 | |
4be44fcd LB |
111 | unlock_and_exit: |
112 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
113 | return_ACPI_STATUS(status); | |
1da177e4 | 114 | } |
1da177e4 | 115 | |
8313524a | 116 | ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler) |
1da177e4 LT |
117 | |
118 | /******************************************************************************* | |
119 | * | |
120 | * FUNCTION: acpi_remove_address_space_handler | |
121 | * | |
122 | * PARAMETERS: Device - Handle for the device | |
123 | * space_id - The address space ID | |
124 | * Handler - Address of the handler | |
125 | * | |
126 | * RETURN: Status | |
127 | * | |
128 | * DESCRIPTION: Remove a previously installed handler. | |
129 | * | |
130 | ******************************************************************************/ | |
1da177e4 | 131 | acpi_status |
4be44fcd LB |
132 | acpi_remove_address_space_handler(acpi_handle device, |
133 | acpi_adr_space_type space_id, | |
134 | acpi_adr_space_handler handler) | |
1da177e4 | 135 | { |
4be44fcd LB |
136 | union acpi_operand_object *obj_desc; |
137 | union acpi_operand_object *handler_obj; | |
138 | union acpi_operand_object *region_obj; | |
139 | union acpi_operand_object **last_obj_ptr; | |
140 | struct acpi_namespace_node *node; | |
141 | acpi_status status; | |
1da177e4 | 142 | |
b229cf92 | 143 | ACPI_FUNCTION_TRACE(acpi_remove_address_space_handler); |
1da177e4 LT |
144 | |
145 | /* Parameter validation */ | |
146 | ||
147 | if (!device) { | |
4be44fcd | 148 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
149 | } |
150 | ||
4be44fcd LB |
151 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
152 | if (ACPI_FAILURE(status)) { | |
153 | return_ACPI_STATUS(status); | |
1da177e4 LT |
154 | } |
155 | ||
156 | /* Convert and validate the device handle */ | |
157 | ||
f24b664d | 158 | node = acpi_ns_validate_handle(device); |
f6dd9221 BM |
159 | if (!node || |
160 | ((node->type != ACPI_TYPE_DEVICE) && | |
161 | (node->type != ACPI_TYPE_PROCESSOR) && | |
162 | (node->type != ACPI_TYPE_THERMAL) && | |
163 | (node != acpi_gbl_root_node))) { | |
1da177e4 LT |
164 | status = AE_BAD_PARAMETER; |
165 | goto unlock_and_exit; | |
166 | } | |
167 | ||
168 | /* Make sure the internal object exists */ | |
169 | ||
4be44fcd | 170 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
171 | if (!obj_desc) { |
172 | status = AE_NOT_EXIST; | |
173 | goto unlock_and_exit; | |
174 | } | |
175 | ||
176 | /* Find the address handler the user requested */ | |
177 | ||
178 | handler_obj = obj_desc->device.handler; | |
179 | last_obj_ptr = &obj_desc->device.handler; | |
180 | while (handler_obj) { | |
52fc0b02 | 181 | |
1da177e4 LT |
182 | /* We have a handler, see if user requested this one */ |
183 | ||
184 | if (handler_obj->address_space.space_id == space_id) { | |
52fc0b02 | 185 | |
f6dd9221 BM |
186 | /* Handler must be the same as the installed handler */ |
187 | ||
188 | if (handler_obj->address_space.handler != handler) { | |
189 | status = AE_BAD_PARAMETER; | |
190 | goto unlock_and_exit; | |
191 | } | |
192 | ||
1da177e4 LT |
193 | /* Matched space_id, first dereference this in the Regions */ |
194 | ||
4be44fcd | 195 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
d4913dc6 BM |
196 | "Removing address handler %p(%p) for region %s " |
197 | "on Device %p(%p)\n", | |
4be44fcd LB |
198 | handler_obj, handler, |
199 | acpi_ut_get_region_name(space_id), | |
200 | node, obj_desc)); | |
1da177e4 LT |
201 | |
202 | region_obj = handler_obj->address_space.region_list; | |
203 | ||
204 | /* Walk the handler's region list */ | |
205 | ||
206 | while (region_obj) { | |
207 | /* | |
208 | * First disassociate the handler from the region. | |
209 | * | |
210 | * NOTE: this doesn't mean that the region goes away | |
211 | * The region is just inaccessible as indicated to | |
212 | * the _REG method | |
213 | */ | |
4be44fcd | 214 | acpi_ev_detach_region(region_obj, TRUE); |
1da177e4 LT |
215 | |
216 | /* | |
217 | * Walk the list: Just grab the head because the | |
218 | * detach_region removed the previous head. | |
219 | */ | |
4be44fcd LB |
220 | region_obj = |
221 | handler_obj->address_space.region_list; | |
1da177e4 LT |
222 | |
223 | } | |
224 | ||
225 | /* Remove this Handler object from the list */ | |
226 | ||
227 | *last_obj_ptr = handler_obj->address_space.next; | |
228 | ||
229 | /* Now we can delete the handler object */ | |
230 | ||
4be44fcd | 231 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
232 | goto unlock_and_exit; |
233 | } | |
234 | ||
235 | /* Walk the linked list of handlers */ | |
236 | ||
237 | last_obj_ptr = &handler_obj->address_space.next; | |
238 | handler_obj = handler_obj->address_space.next; | |
239 | } | |
240 | ||
241 | /* The handler does not exist */ | |
242 | ||
4be44fcd | 243 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
b229cf92 | 244 | "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", |
4be44fcd LB |
245 | handler, acpi_ut_get_region_name(space_id), space_id, |
246 | node, obj_desc)); | |
1da177e4 LT |
247 | |
248 | status = AE_NOT_EXIST; | |
249 | ||
4be44fcd LB |
250 | unlock_and_exit: |
251 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
252 | return_ACPI_STATUS(status); | |
1da177e4 | 253 | } |
1da177e4 | 254 | |
8313524a | 255 | ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler) |