reactos/drivers/bus/acpi/acpica/events/evxfregn.c

   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)