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 - 2014, 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 #define EXPORT_ACPI_INTERFACES 119 120 #include "acpi.h" 121 #include "accommon.h" 122 #include "acnamesp.h" 123 #include "acevents.h" 124 125 #define _COMPONENT ACPI_EVENTS 126 ACPI_MODULE_NAME ("evxfregn") 127 128 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiInstallAddressSpaceHandler 132 * 133 * PARAMETERS: Device - Handle for the device 134 * SpaceId - The address space ID 135 * Handler - Address of the handler 136 * Setup - Address of the setup function 137 * Context - Value passed to the handler on each access 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. 142 * 143 * NOTE: This function should only be called after AcpiEnableSubsystem has 144 * been called. This is because any _REG methods associated with the Space ID 145 * are executed here, and these methods can only be safely executed after 146 * the default handlers have been installed and the hardware has been 147 * initialized (via AcpiEnableSubsystem.) 148 * 149 ******************************************************************************/ 150 151 ACPI_STATUS 152 AcpiInstallAddressSpaceHandler ( 153 ACPI_HANDLE Device, 154 ACPI_ADR_SPACE_TYPE SpaceId, 155 ACPI_ADR_SPACE_HANDLER Handler, 156 ACPI_ADR_SPACE_SETUP Setup, 157 void *Context) 158 { 159 ACPI_NAMESPACE_NODE *Node; 160 ACPI_STATUS Status; 161 162 163 ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler); 164 165 166 /* Parameter validation */ 167 168 if (!Device) 169 { 170 return_ACPI_STATUS (AE_BAD_PARAMETER); 171 } 172 173 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 174 if (ACPI_FAILURE (Status)) 175 { 176 return_ACPI_STATUS (Status); 177 } 178 179 /* Convert and validate the device handle */ 180 181 Node = AcpiNsValidateHandle (Device); 182 if (!Node) 183 { 184 Status = AE_BAD_PARAMETER; 185 goto UnlockAndExit; 186 } 187 188 /* Install the handler for all Regions for this Space ID */ 189 190 Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context); 191 if (ACPI_FAILURE (Status)) 192 { 193 goto UnlockAndExit; 194 } 195 196 /* 197 * For the default SpaceIDs, (the IDs for which there are default region handlers 198 * installed) Only execute the _REG methods if the global initialization _REG 199 * methods have already been run (via AcpiInitializeObjects). In other words, 200 * we will defer the execution of the _REG methods for these SpaceIDs until 201 * execution of AcpiInitializeObjects. This is done because we need the handlers 202 * for the default spaces (mem/io/pci/table) to be installed before we can run 203 * any control methods (or _REG methods). There is known BIOS code that depends 204 * on this. 205 * 206 * For all other SpaceIDs, we can safely execute the _REG methods immediately. 207 * This means that for IDs like EmbeddedController, this function should be called 208 * only after AcpiEnableSubsystem has been called. 209 */ 210 switch (SpaceId) 211 { 212 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 213 case ACPI_ADR_SPACE_SYSTEM_IO: 214 case ACPI_ADR_SPACE_PCI_CONFIG: 215 case ACPI_ADR_SPACE_DATA_TABLE: 216 217 if (!AcpiGbl_RegMethodsExecuted) 218 { 219 /* We will defer execution of the _REG methods for this space */ 220 goto UnlockAndExit; 221 } 222 break; 223 224 default: 225 226 break; 227 } 228 229 /* Run all _REG methods for this address space */ 230 231 Status = AcpiEvExecuteRegMethods (Node, SpaceId); 232 233 234 UnlockAndExit: 235 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 236 return_ACPI_STATUS (Status); 237 } 238 239 ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler) 240 241 242 /******************************************************************************* 243 * 244 * FUNCTION: AcpiRemoveAddressSpaceHandler 245 * 246 * PARAMETERS: Device - Handle for the device 247 * SpaceId - The address space ID 248 * Handler - Address of the handler 249 * 250 * RETURN: Status 251 * 252 * DESCRIPTION: Remove a previously installed handler. 253 * 254 ******************************************************************************/ 255 256 ACPI_STATUS 257 AcpiRemoveAddressSpaceHandler ( 258 ACPI_HANDLE Device, 259 ACPI_ADR_SPACE_TYPE SpaceId, 260 ACPI_ADR_SPACE_HANDLER Handler) 261 { 262 ACPI_OPERAND_OBJECT *ObjDesc; 263 ACPI_OPERAND_OBJECT *HandlerObj; 264 ACPI_OPERAND_OBJECT *RegionObj; 265 ACPI_OPERAND_OBJECT **LastObjPtr; 266 ACPI_NAMESPACE_NODE *Node; 267 ACPI_STATUS Status; 268 269 270 ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler); 271 272 273 /* Parameter validation */ 274 275 if (!Device) 276 { 277 return_ACPI_STATUS (AE_BAD_PARAMETER); 278 } 279 280 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 281 if (ACPI_FAILURE (Status)) 282 { 283 return_ACPI_STATUS (Status); 284 } 285 286 /* Convert and validate the device handle */ 287 288 Node = AcpiNsValidateHandle (Device); 289 if (!Node || 290 ((Node->Type != ACPI_TYPE_DEVICE) && 291 (Node->Type != ACPI_TYPE_PROCESSOR) && 292 (Node->Type != ACPI_TYPE_THERMAL) && 293 (Node != AcpiGbl_RootNode))) 294 { 295 Status = AE_BAD_PARAMETER; 296 goto UnlockAndExit; 297 } 298 299 /* Make sure the internal object exists */ 300 301 ObjDesc = AcpiNsGetAttachedObject (Node); 302 if (!ObjDesc) 303 { 304 Status = AE_NOT_EXIST; 305 goto UnlockAndExit; 306 } 307 308 /* Find the address handler the user requested */ 309 310 HandlerObj = ObjDesc->Device.Handler; 311 LastObjPtr = &ObjDesc->Device.Handler; 312 while (HandlerObj) 313 { 314 /* We have a handler, see if user requested this one */ 315 316 if (HandlerObj->AddressSpace.SpaceId == SpaceId) 317 { 318 /* Handler must be the same as the installed handler */ 319 320 if (HandlerObj->AddressSpace.Handler != Handler) 321 { 322 Status = AE_BAD_PARAMETER; 323 goto UnlockAndExit; 324 } 325 326 /* Matched SpaceId, first dereference this in the Regions */ 327 328 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 329 "Removing address handler %p(%p) for region %s " 330 "on Device %p(%p)\n", 331 HandlerObj, Handler, AcpiUtGetRegionName (SpaceId), 332 Node, ObjDesc)); 333 334 RegionObj = HandlerObj->AddressSpace.RegionList; 335 336 /* Walk the handler's region list */ 337 338 while (RegionObj) 339 { 340 /* 341 * First disassociate the handler from the region. 342 * 343 * NOTE: this doesn't mean that the region goes away 344 * The region is just inaccessible as indicated to 345 * the _REG method 346 */ 347 AcpiEvDetachRegion (RegionObj, TRUE); 348 349 /* 350 * Walk the list: Just grab the head because the 351 * DetachRegion removed the previous head. 352 */ 353 RegionObj = HandlerObj->AddressSpace.RegionList; 354 355 } 356 357 /* Remove this Handler object from the list */ 358 359 *LastObjPtr = HandlerObj->AddressSpace.Next; 360 361 /* Now we can delete the handler object */ 362 363 AcpiUtRemoveReference (HandlerObj); 364 goto UnlockAndExit; 365 } 366 367 /* Walk the linked list of handlers */ 368 369 LastObjPtr = &HandlerObj->AddressSpace.Next; 370 HandlerObj = HandlerObj->AddressSpace.Next; 371 } 372 373 /* The handler does not exist */ 374 375 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 376 "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", 377 Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc)); 378 379 Status = AE_NOT_EXIST; 380 381 UnlockAndExit: 382 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 383 return_ACPI_STATUS (Status); 384 } 385 386 ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler) 387