1 /****************************************************************************** 2 * 3 * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and 4 * Address Spaces. 5 * 6 *****************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 #define __EVXFREGN_C__ 118 119 #include "acpi.h" 120 #include "accommon.h" 121 #include "acnamesp.h" 122 #include "acevents.h" 123 124 #define _COMPONENT ACPI_EVENTS 125 ACPI_MODULE_NAME ("evxfregn") 126 127 128 /******************************************************************************* 129 * 130 * FUNCTION: AcpiInstallAddressSpaceHandler 131 * 132 * PARAMETERS: Device - Handle for the device 133 * SpaceId - The address space ID 134 * Handler - Address of the handler 135 * Setup - Address of the setup function 136 * Context - Value passed to the handler on each access 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. 141 * 142 ******************************************************************************/ 143 144 ACPI_STATUS 145 AcpiInstallAddressSpaceHandler ( 146 ACPI_HANDLE Device, 147 ACPI_ADR_SPACE_TYPE SpaceId, 148 ACPI_ADR_SPACE_HANDLER Handler, 149 ACPI_ADR_SPACE_SETUP Setup, 150 void *Context) 151 { 152 ACPI_NAMESPACE_NODE *Node; 153 ACPI_STATUS Status; 154 155 156 ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler); 157 158 159 /* Parameter validation */ 160 161 if (!Device) 162 { 163 return_ACPI_STATUS (AE_BAD_PARAMETER); 164 } 165 166 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 167 if (ACPI_FAILURE (Status)) 168 { 169 return_ACPI_STATUS (Status); 170 } 171 172 /* Convert and validate the device handle */ 173 174 Node = AcpiNsMapHandleToNode (Device); 175 if (!Node) 176 { 177 Status = AE_BAD_PARAMETER; 178 goto UnlockAndExit; 179 } 180 181 /* Install the handler for all Regions for this Space ID */ 182 183 Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context); 184 if (ACPI_FAILURE (Status)) 185 { 186 goto UnlockAndExit; 187 } 188 189 /* Run all _REG methods for this address space */ 190 191 Status = AcpiEvExecuteRegMethods (Node, SpaceId); 192 193 UnlockAndExit: 194 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 195 return_ACPI_STATUS (Status); 196 } 197 198 ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler) 199 200 201 /******************************************************************************* 202 * 203 * FUNCTION: AcpiRemoveAddressSpaceHandler 204 * 205 * PARAMETERS: Device - Handle for the device 206 * SpaceId - The address space ID 207 * Handler - Address of the handler 208 * 209 * RETURN: Status 210 * 211 * DESCRIPTION: Remove a previously installed handler. 212 * 213 ******************************************************************************/ 214 215 ACPI_STATUS 216 AcpiRemoveAddressSpaceHandler ( 217 ACPI_HANDLE Device, 218 ACPI_ADR_SPACE_TYPE SpaceId, 219 ACPI_ADR_SPACE_HANDLER Handler) 220 { 221 ACPI_OPERAND_OBJECT *ObjDesc; 222 ACPI_OPERAND_OBJECT *HandlerObj; 223 ACPI_OPERAND_OBJECT *RegionObj; 224 ACPI_OPERAND_OBJECT **LastObjPtr; 225 ACPI_NAMESPACE_NODE *Node; 226 ACPI_STATUS Status; 227 228 229 ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler); 230 231 232 /* Parameter validation */ 233 234 if (!Device) 235 { 236 return_ACPI_STATUS (AE_BAD_PARAMETER); 237 } 238 239 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 240 if (ACPI_FAILURE (Status)) 241 { 242 return_ACPI_STATUS (Status); 243 } 244 245 /* Convert and validate the device handle */ 246 247 Node = AcpiNsMapHandleToNode (Device); 248 if (!Node || 249 ((Node->Type != ACPI_TYPE_DEVICE) && 250 (Node->Type != ACPI_TYPE_PROCESSOR) && 251 (Node->Type != ACPI_TYPE_THERMAL) && 252 (Node != AcpiGbl_RootNode))) 253 { 254 Status = AE_BAD_PARAMETER; 255 goto UnlockAndExit; 256 } 257 258 /* Make sure the internal object exists */ 259 260 ObjDesc = AcpiNsGetAttachedObject (Node); 261 if (!ObjDesc) 262 { 263 Status = AE_NOT_EXIST; 264 goto UnlockAndExit; 265 } 266 267 /* Find the address handler the user requested */ 268 269 HandlerObj = ObjDesc->Device.Handler; 270 LastObjPtr = &ObjDesc->Device.Handler; 271 while (HandlerObj) 272 { 273 /* We have a handler, see if user requested this one */ 274 275 if (HandlerObj->AddressSpace.SpaceId == SpaceId) 276 { 277 /* Handler must be the same as the installed handler */ 278 279 if (HandlerObj->AddressSpace.Handler != Handler) 280 { 281 Status = AE_BAD_PARAMETER; 282 goto UnlockAndExit; 283 } 284 285 /* Matched SpaceId, first dereference this in the Regions */ 286 287 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 288 "Removing address handler %p(%p) for region %s " 289 "on Device %p(%p)\n", 290 HandlerObj, Handler, AcpiUtGetRegionName (SpaceId), 291 Node, ObjDesc)); 292 293 RegionObj = HandlerObj->AddressSpace.RegionList; 294 295 /* Walk the handler's region list */ 296 297 while (RegionObj) 298 { 299 /* 300 * First disassociate the handler from the region. 301 * 302 * NOTE: this doesn't mean that the region goes away 303 * The region is just inaccessible as indicated to 304 * the _REG method 305 */ 306 AcpiEvDetachRegion (RegionObj, TRUE); 307 308 /* 309 * Walk the list: Just grab the head because the 310 * DetachRegion removed the previous head. 311 */ 312 RegionObj = HandlerObj->AddressSpace.RegionList; 313 314 } 315 316 /* Remove this Handler object from the list */ 317 318 *LastObjPtr = HandlerObj->AddressSpace.Next; 319 320 /* Now we can delete the handler object */ 321 322 AcpiUtRemoveReference (HandlerObj); 323 goto UnlockAndExit; 324 } 325 326 /* Walk the linked list of handlers */ 327 328 LastObjPtr = &HandlerObj->AddressSpace.Next; 329 HandlerObj = HandlerObj->AddressSpace.Next; 330 } 331 332 /* The handler does not exist */ 333 334 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 335 "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", 336 Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc)); 337 338 Status = AE_NOT_EXIST; 339 340 UnlockAndExit: 341 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 342 return_ACPI_STATUS (Status); 343 } 344 345 ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler) 346 347