Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and |
| 4 | * Address Spaces. |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 45 | #include <linux/module.h> |
| 46 | |
| 47 | #include <acpi/acpi.h> |
| 48 | #include <acpi/acnamesp.h> |
| 49 | #include <acpi/acevents.h> |
| 50 | |
| 51 | #define _COMPONENT ACPI_EVENTS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("evxfregn") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /******************************************************************************* |
| 55 | * |
| 56 | * FUNCTION: acpi_install_address_space_handler |
| 57 | * |
| 58 | * PARAMETERS: Device - Handle for the device |
| 59 | * space_id - The address space ID |
| 60 | * Handler - Address of the handler |
| 61 | * Setup - Address of the setup function |
| 62 | * Context - Value passed to the handler on each access |
| 63 | * |
| 64 | * RETURN: Status |
| 65 | * |
| 66 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. |
| 67 | * |
| 68 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 70 | acpi_install_address_space_handler(acpi_handle device, |
| 71 | acpi_adr_space_type space_id, |
| 72 | acpi_adr_space_handler handler, |
| 73 | acpi_adr_space_setup setup, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | struct acpi_namespace_node *node; |
| 76 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 78 | ACPI_FUNCTION_TRACE("acpi_install_address_space_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /* Parameter validation */ |
| 81 | |
| 82 | if (!device) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 87 | if (ACPI_FAILURE(status)) { |
| 88 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | /* Convert and validate the device handle */ |
| 92 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 93 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | if (!node) { |
| 95 | status = AE_BAD_PARAMETER; |
| 96 | goto unlock_and_exit; |
| 97 | } |
| 98 | |
| 99 | /* Install the handler for all Regions for this Space ID */ |
| 100 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 101 | status = |
| 102 | acpi_ev_install_space_handler(node, space_id, handler, setup, |
| 103 | context); |
| 104 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | goto unlock_and_exit; |
| 106 | } |
| 107 | |
| 108 | /* Run all _REG methods for this address space */ |
| 109 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | status = acpi_ev_execute_reg_methods(node, space_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | unlock_and_exit: |
| 113 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 114 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | EXPORT_SYMBOL(acpi_install_address_space_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | /******************************************************************************* |
| 120 | * |
| 121 | * FUNCTION: acpi_remove_address_space_handler |
| 122 | * |
| 123 | * PARAMETERS: Device - Handle for the device |
| 124 | * space_id - The address space ID |
| 125 | * Handler - Address of the handler |
| 126 | * |
| 127 | * RETURN: Status |
| 128 | * |
| 129 | * DESCRIPTION: Remove a previously installed handler. |
| 130 | * |
| 131 | ******************************************************************************/ |
| 132 | |
| 133 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 134 | acpi_remove_address_space_handler(acpi_handle device, |
| 135 | acpi_adr_space_type space_id, |
| 136 | acpi_adr_space_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 138 | union acpi_operand_object *obj_desc; |
| 139 | union acpi_operand_object *handler_obj; |
| 140 | union acpi_operand_object *region_obj; |
| 141 | union acpi_operand_object **last_obj_ptr; |
| 142 | struct acpi_namespace_node *node; |
| 143 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 145 | ACPI_FUNCTION_TRACE("acpi_remove_address_space_handler"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | /* Parameter validation */ |
| 148 | |
| 149 | if (!device) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 154 | if (ACPI_FAILURE(status)) { |
| 155 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /* Convert and validate the device handle */ |
| 159 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | node = acpi_ns_map_handle_to_node(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | if (!node) { |
| 162 | status = AE_BAD_PARAMETER; |
| 163 | goto unlock_and_exit; |
| 164 | } |
| 165 | |
| 166 | /* Make sure the internal object exists */ |
| 167 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 168 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (!obj_desc) { |
| 170 | status = AE_NOT_EXIST; |
| 171 | goto unlock_and_exit; |
| 172 | } |
| 173 | |
| 174 | /* Find the address handler the user requested */ |
| 175 | |
| 176 | handler_obj = obj_desc->device.handler; |
| 177 | last_obj_ptr = &obj_desc->device.handler; |
| 178 | while (handler_obj) { |
| 179 | /* We have a handler, see if user requested this one */ |
| 180 | |
| 181 | if (handler_obj->address_space.space_id == space_id) { |
| 182 | /* Matched space_id, first dereference this in the Regions */ |
| 183 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 185 | "Removing address handler %p(%p) for region %s on Device %p(%p)\n", |
| 186 | handler_obj, handler, |
| 187 | acpi_ut_get_region_name(space_id), |
| 188 | node, obj_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
| 190 | region_obj = handler_obj->address_space.region_list; |
| 191 | |
| 192 | /* Walk the handler's region list */ |
| 193 | |
| 194 | while (region_obj) { |
| 195 | /* |
| 196 | * First disassociate the handler from the region. |
| 197 | * |
| 198 | * NOTE: this doesn't mean that the region goes away |
| 199 | * The region is just inaccessible as indicated to |
| 200 | * the _REG method |
| 201 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 202 | acpi_ev_detach_region(region_obj, TRUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | /* |
| 205 | * Walk the list: Just grab the head because the |
| 206 | * detach_region removed the previous head. |
| 207 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 208 | region_obj = |
| 209 | handler_obj->address_space.region_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | } |
| 212 | |
| 213 | /* Remove this Handler object from the list */ |
| 214 | |
| 215 | *last_obj_ptr = handler_obj->address_space.next; |
| 216 | |
| 217 | /* Now we can delete the handler object */ |
| 218 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | acpi_ut_remove_reference(handler_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | goto unlock_and_exit; |
| 221 | } |
| 222 | |
| 223 | /* Walk the linked list of handlers */ |
| 224 | |
| 225 | last_obj_ptr = &handler_obj->address_space.next; |
| 226 | handler_obj = handler_obj->address_space.next; |
| 227 | } |
| 228 | |
| 229 | /* The handler does not exist */ |
| 230 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 231 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
| 232 | "Unable to remove address handler %p for %s(%X), dev_node %p, obj %p\n", |
| 233 | handler, acpi_ut_get_region_name(space_id), space_id, |
| 234 | node, obj_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | status = AE_NOT_EXIST; |
| 237 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | unlock_and_exit: |
| 239 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 240 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | EXPORT_SYMBOL(acpi_remove_address_space_handler); |