usr/src/uts/intel/io/acpica/events/evxfregn.c

   1 /******************************************************************************
   2  *
   3  * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
   4  *                         Address Spaces.
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2016, Intel Corp.
  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 #define EXPORT_ACPI_INTERFACES
  46
  47 #include "acpi.h"
  48 #include "accommon.h"
  49 #include "acnamesp.h"
  50 #include "acevents.h"
  51
  52 #define _COMPONENT          ACPI_EVENTS
  53         ACPI_MODULE_NAME    ("evxfregn")
  54
  55
  56 /*******************************************************************************
  57  *
  58  * FUNCTION:    AcpiInstallAddressSpaceHandler
  59  *
  60  * PARAMETERS:  Device          - Handle for the device
  61  *              SpaceId         - The address space ID
  62  *              Handler         - Address of the handler
  63  *              Setup           - Address of the setup function
  64  *              Context         - Value passed to the handler on each access
  65  *
  66  * RETURN:      Status
  67  *
  68  * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
  69  *
  70  * NOTE: This function should only be called after AcpiEnableSubsystem has
  71  * been called. This is because any _REG methods associated with the Space ID
  72  * are executed here, and these methods can only be safely executed after
  73  * the default handlers have been installed and the hardware has been
  74  * initialized (via AcpiEnableSubsystem.)
  75  *
  76  ******************************************************************************/
  77
  78 ACPI_STATUS
  79 AcpiInstallAddressSpaceHandler (
  80     ACPI_HANDLE             Device,
  81     ACPI_ADR_SPACE_TYPE     SpaceId,
  82     ACPI_ADR_SPACE_HANDLER  Handler,
  83     ACPI_ADR_SPACE_SETUP    Setup,
  84     void                    *Context)
  85 {
  86     ACPI_NAMESPACE_NODE     *Node;
  87     ACPI_STATUS             Status;
  88
  89
  90     ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler);
  91
  92
  93     /* Parameter validation */
  94
  95     if (!Device)
  96     {
  97         return_ACPI_STATUS (AE_BAD_PARAMETER);
  98     }
  99
 100     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 101     if (ACPI_FAILURE (Status))
 102     {
 103         return_ACPI_STATUS (Status);
 104     }
 105
 106     /* Convert and validate the device handle */
 107
 108     Node = AcpiNsValidateHandle (Device);
 109     if (!Node)
 110     {
 111         Status = AE_BAD_PARAMETER;
 112         goto UnlockAndExit;
 113     }
 114
 115     /* Install the handler for all Regions for this Space ID */
 116
 117     Status = AcpiEvInstallSpaceHandler (
 118         Node, SpaceId, Handler, Setup, Context);
 119     if (ACPI_FAILURE (Status))
 120     {
 121         goto UnlockAndExit;
 122     }
 123
 124     /* Run all _REG methods for this address space */
 125
 126     AcpiEvExecuteRegMethods (Node, SpaceId, ACPI_REG_CONNECT);
 127
 128
 129 UnlockAndExit:
 130     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 131     return_ACPI_STATUS (Status);
 132 }
 133
 134 ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler)
 135
 136
 137 /*******************************************************************************
 138  *
 139  * FUNCTION:    AcpiRemoveAddressSpaceHandler
 140  *
 141  * PARAMETERS:  Device          - Handle for the device
 142  *              SpaceId         - The address space ID
 143  *              Handler         - Address of the handler
 144  *
 145  * RETURN:      Status
 146  *
 147  * DESCRIPTION: Remove a previously installed handler.
 148  *
 149  ******************************************************************************/
 150
 151 ACPI_STATUS
 152 AcpiRemoveAddressSpaceHandler (
 153     ACPI_HANDLE             Device,
 154     ACPI_ADR_SPACE_TYPE     SpaceId,
 155     ACPI_ADR_SPACE_HANDLER  Handler)
 156 {
 157     ACPI_OPERAND_OBJECT     *ObjDesc;
 158     ACPI_OPERAND_OBJECT     *HandlerObj;
 159     ACPI_OPERAND_OBJECT     *RegionObj;
 160     ACPI_OPERAND_OBJECT     **LastObjPtr;
 161     ACPI_NAMESPACE_NODE     *Node;
 162     ACPI_STATUS             Status;
 163
 164
 165     ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler);
 166
 167
 168     /* Parameter validation */
 169
 170     if (!Device)
 171     {
 172         return_ACPI_STATUS (AE_BAD_PARAMETER);
 173     }
 174
 175     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 176     if (ACPI_FAILURE (Status))
 177     {
 178         return_ACPI_STATUS (Status);
 179     }
 180
 181     /* Convert and validate the device handle */
 182
 183     Node = AcpiNsValidateHandle (Device);
 184     if (!Node ||
 185         ((Node->Type != ACPI_TYPE_DEVICE)    &&
 186          (Node->Type != ACPI_TYPE_PROCESSOR) &&
 187          (Node->Type != ACPI_TYPE_THERMAL)   &&
 188          (Node != AcpiGbl_RootNode)))
 189     {
 190         Status = AE_BAD_PARAMETER;
 191         goto UnlockAndExit;
 192     }
 193
 194     /* Make sure the internal object exists */
 195
 196     ObjDesc = AcpiNsGetAttachedObject (Node);
 197     if (!ObjDesc)
 198     {
 199         Status = AE_NOT_EXIST;
 200         goto UnlockAndExit;
 201     }
 202
 203     /* Find the address handler the user requested */
 204
 205     HandlerObj = ObjDesc->CommonNotify.Handler;
 206     LastObjPtr = &ObjDesc->CommonNotify.Handler;
 207     while (HandlerObj)
 208     {
 209         /* We have a handler, see if user requested this one */
 210
 211         if (HandlerObj->AddressSpace.SpaceId == SpaceId)
 212         {
 213             /* Handler must be the same as the installed handler */
 214
 215             if (HandlerObj->AddressSpace.Handler != Handler)
 216             {
 217                 Status = AE_BAD_PARAMETER;
 218                 goto UnlockAndExit;
 219             }
 220
 221             /* Matched SpaceId, first dereference this in the Regions */
 222
 223             ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
 224                 "Removing address handler %p(%p) for region %s "
 225                 "on Device %p(%p)\n",
 226                 HandlerObj, Handler, AcpiUtGetRegionName (SpaceId),
 227                 Node, ObjDesc));
 228
 229             RegionObj = HandlerObj->AddressSpace.RegionList;
 230
 231             /* Walk the handler's region list */
 232
 233             while (RegionObj)
 234             {
 235                 /*
 236                  * First disassociate the handler from the region.
 237                  *
 238                  * NOTE: this doesn't mean that the region goes away
 239                  * The region is just inaccessible as indicated to
 240                  * the _REG method
 241                  */
 242                 AcpiEvDetachRegion (RegionObj, TRUE);
 243
 244                 /*
 245                  * Walk the list: Just grab the head because the
 246                  * DetachRegion removed the previous head.
 247                  */
 248                 RegionObj = HandlerObj->AddressSpace.RegionList;
 249
 250             }
 251
 252             /* Remove this Handler object from the list */
 253
 254             *LastObjPtr = HandlerObj->AddressSpace.Next;
 255
 256             /* Now we can delete the handler object */
 257
 258             AcpiUtRemoveReference (HandlerObj);
 259             goto UnlockAndExit;
 260         }
 261
 262         /* Walk the linked list of handlers */
 263
 264         LastObjPtr = &HandlerObj->AddressSpace.Next;
 265         HandlerObj = HandlerObj->AddressSpace.Next;
 266     }
 267
 268     /* The handler does not exist */
 269
 270     ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
 271         "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
 272         Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc));
 273
 274     Status = AE_NOT_EXIST;
 275
 276 UnlockAndExit:
 277     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 278     return_ACPI_STATUS (Status);
 279 }
 280
 281 ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler)