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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 | /* | |
c8100dc4 | 9 | * Copyright (C) 2000 - 2016, 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 | ||
839e928f LZ |
45 | #define EXPORT_ACPI_INTERFACES |
46 | ||
1da177e4 | 47 | #include <acpi/acpi.h> |
e2f7a777 LB |
48 | #include "accommon.h" |
49 | #include "acnamesp.h" | |
50 | #include "acevents.h" | |
1da177e4 LT |
51 | |
52 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 53 | ACPI_MODULE_NAME("evxfregn") |
1da177e4 LT |
54 | |
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_install_address_space_handler | |
58 | * | |
ba494bee | 59 | * PARAMETERS: device - Handle for the device |
1da177e4 | 60 | * space_id - The address space ID |
ba494bee BM |
61 | * handler - Address of the handler |
62 | * setup - Address of the setup function | |
63 | * context - Value passed to the handler on each access | |
1da177e4 LT |
64 | * |
65 | * RETURN: Status | |
66 | * | |
67 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
68 | * | |
3989170f BM |
69 | * NOTE: This function should only be called after acpi_enable_subsystem has |
70 | * been called. This is because any _REG methods associated with the Space ID | |
71 | * are executed here, and these methods can only be safely executed after | |
72 | * the default handlers have been installed and the hardware has been | |
73 | * initialized (via acpi_enable_subsystem.) | |
74 | * | |
1da177e4 | 75 | ******************************************************************************/ |
1da177e4 | 76 | acpi_status |
4be44fcd LB |
77 | acpi_install_address_space_handler(acpi_handle device, |
78 | acpi_adr_space_type space_id, | |
79 | acpi_adr_space_handler handler, | |
80 | acpi_adr_space_setup setup, void *context) | |
1da177e4 | 81 | { |
4be44fcd LB |
82 | struct acpi_namespace_node *node; |
83 | acpi_status status; | |
1da177e4 | 84 | |
b229cf92 | 85 | ACPI_FUNCTION_TRACE(acpi_install_address_space_handler); |
1da177e4 LT |
86 | |
87 | /* Parameter validation */ | |
88 | ||
89 | if (!device) { | |
4be44fcd | 90 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
91 | } |
92 | ||
4be44fcd LB |
93 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
94 | if (ACPI_FAILURE(status)) { | |
95 | return_ACPI_STATUS(status); | |
1da177e4 LT |
96 | } |
97 | ||
98 | /* Convert and validate the device handle */ | |
99 | ||
f24b664d | 100 | node = acpi_ns_validate_handle(device); |
1da177e4 LT |
101 | if (!node) { |
102 | status = AE_BAD_PARAMETER; | |
103 | goto unlock_and_exit; | |
104 | } | |
105 | ||
106 | /* Install the handler for all Regions for this Space ID */ | |
107 | ||
4be44fcd LB |
108 | status = |
109 | acpi_ev_install_space_handler(node, space_id, handler, setup, | |
110 | context); | |
111 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
112 | goto unlock_and_exit; |
113 | } | |
114 | ||
e2066ca1 BM |
115 | /* Run all _REG methods for this address space */ |
116 | ||
d815346f | 117 | acpi_ev_execute_reg_methods(node, space_id, ACPI_REG_CONNECT); |
e2066ca1 | 118 | |
10622bf8 | 119 | unlock_and_exit: |
4be44fcd LB |
120 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
121 | return_ACPI_STATUS(status); | |
1da177e4 | 122 | } |
1da177e4 | 123 | |
8313524a | 124 | ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler) |
1da177e4 LT |
125 | |
126 | /******************************************************************************* | |
127 | * | |
128 | * FUNCTION: acpi_remove_address_space_handler | |
129 | * | |
ba494bee | 130 | * PARAMETERS: device - Handle for the device |
1da177e4 | 131 | * space_id - The address space ID |
ba494bee | 132 | * handler - Address of the handler |
1da177e4 LT |
133 | * |
134 | * RETURN: Status | |
135 | * | |
136 | * DESCRIPTION: Remove a previously installed handler. | |
137 | * | |
138 | ******************************************************************************/ | |
1da177e4 | 139 | acpi_status |
4be44fcd LB |
140 | acpi_remove_address_space_handler(acpi_handle device, |
141 | acpi_adr_space_type space_id, | |
142 | acpi_adr_space_handler handler) | |
1da177e4 | 143 | { |
4be44fcd LB |
144 | union acpi_operand_object *obj_desc; |
145 | union acpi_operand_object *handler_obj; | |
146 | union acpi_operand_object *region_obj; | |
147 | union acpi_operand_object **last_obj_ptr; | |
148 | struct acpi_namespace_node *node; | |
149 | acpi_status status; | |
1da177e4 | 150 | |
b229cf92 | 151 | ACPI_FUNCTION_TRACE(acpi_remove_address_space_handler); |
1da177e4 LT |
152 | |
153 | /* Parameter validation */ | |
154 | ||
155 | if (!device) { | |
4be44fcd | 156 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
157 | } |
158 | ||
4be44fcd LB |
159 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
160 | if (ACPI_FAILURE(status)) { | |
161 | return_ACPI_STATUS(status); | |
1da177e4 LT |
162 | } |
163 | ||
164 | /* Convert and validate the device handle */ | |
165 | ||
f24b664d | 166 | node = acpi_ns_validate_handle(device); |
f6dd9221 BM |
167 | if (!node || |
168 | ((node->type != ACPI_TYPE_DEVICE) && | |
169 | (node->type != ACPI_TYPE_PROCESSOR) && | |
170 | (node->type != ACPI_TYPE_THERMAL) && | |
171 | (node != acpi_gbl_root_node))) { | |
1da177e4 LT |
172 | status = AE_BAD_PARAMETER; |
173 | goto unlock_and_exit; | |
174 | } | |
175 | ||
176 | /* Make sure the internal object exists */ | |
177 | ||
4be44fcd | 178 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
179 | if (!obj_desc) { |
180 | status = AE_NOT_EXIST; | |
181 | goto unlock_and_exit; | |
182 | } | |
183 | ||
184 | /* Find the address handler the user requested */ | |
185 | ||
aa6abd2b LZ |
186 | handler_obj = obj_desc->common_notify.handler; |
187 | last_obj_ptr = &obj_desc->common_notify.handler; | |
1da177e4 | 188 | while (handler_obj) { |
52fc0b02 | 189 | |
1da177e4 LT |
190 | /* We have a handler, see if user requested this one */ |
191 | ||
192 | if (handler_obj->address_space.space_id == space_id) { | |
52fc0b02 | 193 | |
f6dd9221 BM |
194 | /* Handler must be the same as the installed handler */ |
195 | ||
196 | if (handler_obj->address_space.handler != handler) { | |
197 | status = AE_BAD_PARAMETER; | |
198 | goto unlock_and_exit; | |
199 | } | |
200 | ||
1da177e4 LT |
201 | /* Matched space_id, first dereference this in the Regions */ |
202 | ||
4be44fcd | 203 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
d4913dc6 BM |
204 | "Removing address handler %p(%p) for region %s " |
205 | "on Device %p(%p)\n", | |
4be44fcd LB |
206 | handler_obj, handler, |
207 | acpi_ut_get_region_name(space_id), | |
208 | node, obj_desc)); | |
1da177e4 LT |
209 | |
210 | region_obj = handler_obj->address_space.region_list; | |
211 | ||
212 | /* Walk the handler's region list */ | |
213 | ||
214 | while (region_obj) { | |
215 | /* | |
216 | * First disassociate the handler from the region. | |
217 | * | |
218 | * NOTE: this doesn't mean that the region goes away | |
219 | * The region is just inaccessible as indicated to | |
220 | * the _REG method | |
221 | */ | |
4be44fcd | 222 | acpi_ev_detach_region(region_obj, TRUE); |
1da177e4 LT |
223 | |
224 | /* | |
225 | * Walk the list: Just grab the head because the | |
226 | * detach_region removed the previous head. | |
227 | */ | |
4be44fcd LB |
228 | region_obj = |
229 | handler_obj->address_space.region_list; | |
1da177e4 LT |
230 | |
231 | } | |
232 | ||
233 | /* Remove this Handler object from the list */ | |
234 | ||
235 | *last_obj_ptr = handler_obj->address_space.next; | |
236 | ||
237 | /* Now we can delete the handler object */ | |
238 | ||
4be44fcd | 239 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
240 | goto unlock_and_exit; |
241 | } | |
242 | ||
243 | /* Walk the linked list of handlers */ | |
244 | ||
245 | last_obj_ptr = &handler_obj->address_space.next; | |
246 | handler_obj = handler_obj->address_space.next; | |
247 | } | |
248 | ||
249 | /* The handler does not exist */ | |
250 | ||
4be44fcd | 251 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
b229cf92 | 252 | "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", |
4be44fcd LB |
253 | handler, acpi_ut_get_region_name(space_id), space_id, |
254 | node, obj_desc)); | |
1da177e4 LT |
255 | |
256 | status = AE_NOT_EXIST; | |
257 | ||
10622bf8 | 258 | unlock_and_exit: |
4be44fcd LB |
259 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
260 | return_ACPI_STATUS(status); | |
1da177e4 | 261 | } |
1da177e4 | 262 | |
8313524a | 263 | ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler) |