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 - 2017, 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 * Alternatively, you may choose to be licensed under the terms of the 118 * following license: 119 * 120 * Redistribution and use in source and binary forms, with or without 121 * modification, are permitted provided that the following conditions 122 * are met: 123 * 1. Redistributions of source code must retain the above copyright 124 * notice, this list of conditions, and the following disclaimer, 125 * without modification. 126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 127 * substantially similar to the "NO WARRANTY" disclaimer below 128 * ("Disclaimer") and any redistribution must be conditioned upon 129 * including a substantially similar Disclaimer requirement for further 130 * binary redistribution. 131 * 3. Neither the names of the above-listed copyright holders nor the names 132 * of any contributors may be used to endorse or promote products derived 133 * from this software without specific prior written permission. 134 * 135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Alternatively, you may choose to be licensed under the terms of the 148 * GNU General Public License ("GPL") version 2 as published by the Free 149 * Software Foundation. 150 * 151 *****************************************************************************/ 152 153 #define EXPORT_ACPI_INTERFACES 154 155 #include <contrib/dev/acpica/include/acpi.h> 156 #include <contrib/dev/acpica/include/accommon.h> 157 #include <contrib/dev/acpica/include/acnamesp.h> 158 #include <contrib/dev/acpica/include/acevents.h> 159 160 #define _COMPONENT ACPI_EVENTS 161 ACPI_MODULE_NAME ("evxfregn") 162 163 164 /******************************************************************************* 165 * 166 * FUNCTION: AcpiInstallAddressSpaceHandler 167 * 168 * PARAMETERS: Device - Handle for the device 169 * SpaceId - The address space ID 170 * Handler - Address of the handler 171 * Setup - Address of the setup function 172 * Context - Value passed to the handler on each access 173 * 174 * RETURN: Status 175 * 176 * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId. 177 * 178 * NOTE: This function should only be called after AcpiEnableSubsystem has 179 * been called. This is because any _REG methods associated with the Space ID 180 * are executed here, and these methods can only be safely executed after 181 * the default handlers have been installed and the hardware has been 182 * initialized (via AcpiEnableSubsystem.) 183 * 184 ******************************************************************************/ 185 186 ACPI_STATUS 187 AcpiInstallAddressSpaceHandler ( 188 ACPI_HANDLE Device, 189 ACPI_ADR_SPACE_TYPE SpaceId, 190 ACPI_ADR_SPACE_HANDLER Handler, 191 ACPI_ADR_SPACE_SETUP Setup, 192 void *Context) 193 { 194 ACPI_NAMESPACE_NODE *Node; 195 ACPI_STATUS Status; 196 197 198 ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler); 199 200 201 /* Parameter validation */ 202 203 if (!Device) 204 { 205 return_ACPI_STATUS (AE_BAD_PARAMETER); 206 } 207 208 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 209 if (ACPI_FAILURE (Status)) 210 { 211 return_ACPI_STATUS (Status); 212 } 213 214 /* Convert and validate the device handle */ 215 216 Node = AcpiNsValidateHandle (Device); 217 if (!Node) 218 { 219 Status = AE_BAD_PARAMETER; 220 goto UnlockAndExit; 221 } 222 223 /* Install the handler for all Regions for this Space ID */ 224 225 Status = AcpiEvInstallSpaceHandler ( 226 Node, SpaceId, Handler, Setup, Context); 227 if (ACPI_FAILURE (Status)) 228 { 229 goto UnlockAndExit; 230 } 231 232 /* Run all _REG methods for this address space */ 233 234 AcpiEvExecuteRegMethods (Node, SpaceId, ACPI_REG_CONNECT); 235 236 237 UnlockAndExit: 238 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 239 return_ACPI_STATUS (Status); 240 } 241 242 ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler) 243 244 245 /******************************************************************************* 246 * 247 * FUNCTION: AcpiRemoveAddressSpaceHandler 248 * 249 * PARAMETERS: Device - Handle for the device 250 * SpaceId - The address space ID 251 * Handler - Address of the handler 252 * 253 * RETURN: Status 254 * 255 * DESCRIPTION: Remove a previously installed handler. 256 * 257 ******************************************************************************/ 258 259 ACPI_STATUS 260 AcpiRemoveAddressSpaceHandler ( 261 ACPI_HANDLE Device, 262 ACPI_ADR_SPACE_TYPE SpaceId, 263 ACPI_ADR_SPACE_HANDLER Handler) 264 { 265 ACPI_OPERAND_OBJECT *ObjDesc; 266 ACPI_OPERAND_OBJECT *HandlerObj; 267 ACPI_OPERAND_OBJECT *RegionObj; 268 ACPI_OPERAND_OBJECT **LastObjPtr; 269 ACPI_NAMESPACE_NODE *Node; 270 ACPI_STATUS Status; 271 272 273 ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler); 274 275 276 /* Parameter validation */ 277 278 if (!Device) 279 { 280 return_ACPI_STATUS (AE_BAD_PARAMETER); 281 } 282 283 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 284 if (ACPI_FAILURE (Status)) 285 { 286 return_ACPI_STATUS (Status); 287 } 288 289 /* Convert and validate the device handle */ 290 291 Node = AcpiNsValidateHandle (Device); 292 if (!Node || 293 ((Node->Type != ACPI_TYPE_DEVICE) && 294 (Node->Type != ACPI_TYPE_PROCESSOR) && 295 (Node->Type != ACPI_TYPE_THERMAL) && 296 (Node != AcpiGbl_RootNode))) 297 { 298 Status = AE_BAD_PARAMETER; 299 goto UnlockAndExit; 300 } 301 302 /* Make sure the internal object exists */ 303 304 ObjDesc = AcpiNsGetAttachedObject (Node); 305 if (!ObjDesc) 306 { 307 Status = AE_NOT_EXIST; 308 goto UnlockAndExit; 309 } 310 311 /* Find the address handler the user requested */ 312 313 HandlerObj = ObjDesc->CommonNotify.Handler; 314 LastObjPtr = &ObjDesc->CommonNotify.Handler; 315 while (HandlerObj) 316 { 317 /* We have a handler, see if user requested this one */ 318 319 if (HandlerObj->AddressSpace.SpaceId == SpaceId) 320 { 321 /* Handler must be the same as the installed handler */ 322 323 if (HandlerObj->AddressSpace.Handler != Handler) 324 { 325 Status = AE_BAD_PARAMETER; 326 goto UnlockAndExit; 327 } 328 329 /* Matched SpaceId, first dereference this in the Regions */ 330 331 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 332 "Removing address handler %p(%p) for region %s " 333 "on Device %p(%p)\n", 334 HandlerObj, Handler, AcpiUtGetRegionName (SpaceId), 335 Node, ObjDesc)); 336 337 RegionObj = HandlerObj->AddressSpace.RegionList; 338 339 /* Walk the handler's region list */ 340 341 while (RegionObj) 342 { 343 /* 344 * First disassociate the handler from the region. 345 * 346 * NOTE: this doesn't mean that the region goes away 347 * The region is just inaccessible as indicated to 348 * the _REG method 349 */ 350 AcpiEvDetachRegion (RegionObj, TRUE); 351 352 /* 353 * Walk the list: Just grab the head because the 354 * DetachRegion removed the previous head. 355 */ 356 RegionObj = HandlerObj->AddressSpace.RegionList; 357 358 } 359 360 /* Remove this Handler object from the list */ 361 362 *LastObjPtr = HandlerObj->AddressSpace.Next; 363 364 /* Now we can delete the handler object */ 365 366 AcpiUtRemoveReference (HandlerObj); 367 goto UnlockAndExit; 368 } 369 370 /* Walk the linked list of handlers */ 371 372 LastObjPtr = &HandlerObj->AddressSpace.Next; 373 HandlerObj = HandlerObj->AddressSpace.Next; 374 } 375 376 /* The handler does not exist */ 377 378 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 379 "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n", 380 Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc)); 381 382 Status = AE_NOT_EXIST; 383 384 UnlockAndExit: 385 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 386 return_ACPI_STATUS (Status); 387 } 388 389 ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler) 390