arch/all-pc/acpica/source/components/events/evmisc.c

   1 /******************************************************************************
   2  *
   3  * Module Name: evmisc - Miscellaneous event manager support functions
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acevents.h"
  47 #include "acnamesp.h"
  48
  49 #define _COMPONENT          ACPI_EVENTS
  50         ACPI_MODULE_NAME    ("evmisc")
  51
  52
  53 /* Local prototypes */
  54
  55 static void ACPI_SYSTEM_XFACE
  56 AcpiEvNotifyDispatch (
  57     void                    *Context);
  58
  59
  60 /*******************************************************************************
  61  *
  62  * FUNCTION:    AcpiEvIsNotifyObject
  63  *
  64  * PARAMETERS:  Node            - Node to check
  65  *
  66  * RETURN:      TRUE if notifies allowed on this object
  67  *
  68  * DESCRIPTION: Check type of node for a object that supports notifies.
  69  *
  70  *              TBD: This could be replaced by a flag bit in the node.
  71  *
  72  ******************************************************************************/
  73
  74 BOOLEAN
  75 AcpiEvIsNotifyObject (
  76     ACPI_NAMESPACE_NODE     *Node)
  77 {
  78     switch (Node->Type)
  79     {
  80     case ACPI_TYPE_DEVICE:
  81     case ACPI_TYPE_PROCESSOR:
  82     case ACPI_TYPE_THERMAL:
  83         /*
  84          * These are the ONLY objects that can receive ACPI notifications
  85          */
  86         return (TRUE);
  87
  88     default:
  89
  90         return (FALSE);
  91     }
  92 }
  93
  94
  95 /*******************************************************************************
  96  *
  97  * FUNCTION:    AcpiEvQueueNotifyRequest
  98  *
  99  * PARAMETERS:  Node            - NS node for the notified object
 100  *              NotifyValue     - Value from the Notify() request
 101  *
 102  * RETURN:      Status
 103  *
 104  * DESCRIPTION: Dispatch a device notification event to a previously
 105  *              installed handler.
 106  *
 107  ******************************************************************************/
 108
 109 ACPI_STATUS
 110 AcpiEvQueueNotifyRequest (
 111     ACPI_NAMESPACE_NODE     *Node,
 112     UINT32                  NotifyValue)
 113 {
 114     ACPI_OPERAND_OBJECT     *ObjDesc;
 115     ACPI_OPERAND_OBJECT     *HandlerListHead = NULL;
 116     ACPI_GENERIC_STATE      *Info;
 117     UINT8                   HandlerListId = 0;
 118     ACPI_STATUS             Status = AE_OK;
 119
 120
 121     ACPI_FUNCTION_NAME (EvQueueNotifyRequest);
 122
 123
 124     /* Are Notifies allowed on this object? */
 125
 126     if (!AcpiEvIsNotifyObject (Node))
 127     {
 128         return (AE_TYPE);
 129     }
 130
 131     /* Get the correct notify list type (System or Device) */
 132
 133     if (NotifyValue <= ACPI_MAX_SYS_NOTIFY)
 134     {
 135         HandlerListId = ACPI_SYSTEM_HANDLER_LIST;
 136     }
 137     else
 138     {
 139         HandlerListId = ACPI_DEVICE_HANDLER_LIST;
 140     }
 141
 142     /* Get the notify object attached to the namespace Node */
 143
 144     ObjDesc = AcpiNsGetAttachedObject (Node);
 145     if (ObjDesc)
 146     {
 147         /* We have an attached object, Get the correct handler list */
 148
 149         HandlerListHead = ObjDesc->CommonNotify.NotifyList[HandlerListId];
 150     }
 151
 152     /*
 153      * If there is no notify handler (Global or Local)
 154      * for this object, just ignore the notify
 155      */
 156     if (!AcpiGbl_GlobalNotify[HandlerListId].Handler && !HandlerListHead)
 157     {
 158         ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 159             "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n",
 160             AcpiUtGetNodeName (Node), NotifyValue, Node));
 161
 162         return (AE_OK);
 163     }
 164
 165     /* Setup notify info and schedule the notify dispatcher */
 166
 167     Info = AcpiUtCreateGenericState ();
 168     if (!Info)
 169     {
 170         return (AE_NO_MEMORY);
 171     }
 172
 173     Info->Common.DescriptorType = ACPI_DESC_TYPE_STATE_NOTIFY;
 174
 175     Info->Notify.Node = Node;
 176     Info->Notify.Value = (UINT16) NotifyValue;
 177     Info->Notify.HandlerListId = HandlerListId;
 178     Info->Notify.HandlerListHead = HandlerListHead;
 179     Info->Notify.Global = &AcpiGbl_GlobalNotify[HandlerListId];
 180
 181     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 182         "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n",
 183         AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type),
 184         NotifyValue, AcpiUtGetNotifyName (NotifyValue), Node));
 185
 186     Status = AcpiOsExecute (OSL_NOTIFY_HANDLER, AcpiEvNotifyDispatch,
 187         Info);
 188     if (ACPI_FAILURE (Status))
 189     {
 190         AcpiUtDeleteGenericState (Info);
 191     }
 192
 193     return (Status);
 194 }
 195
 196
 197 /*******************************************************************************
 198  *
 199  * FUNCTION:    AcpiEvNotifyDispatch
 200  *
 201  * PARAMETERS:  Context         - To be passed to the notify handler
 202  *
 203  * RETURN:      None.
 204  *
 205  * DESCRIPTION: Dispatch a device notification event to a previously
 206  *              installed handler.
 207  *
 208  ******************************************************************************/
 209
 210 static void ACPI_SYSTEM_XFACE
 211 AcpiEvNotifyDispatch (
 212     void                    *Context)
 213 {
 214     ACPI_GENERIC_STATE      *Info = (ACPI_GENERIC_STATE *) Context;
 215     ACPI_OPERAND_OBJECT     *HandlerObj;
 216
 217
 218     ACPI_FUNCTION_ENTRY ();
 219
 220
 221     /* Invoke a global notify handler if installed */
 222
 223     if (Info->Notify.Global->Handler)
 224     {
 225         Info->Notify.Global->Handler (Info->Notify.Node,
 226             Info->Notify.Value,
 227             Info->Notify.Global->Context);
 228     }
 229
 230     /* Now invoke the local notify handler(s) if any are installed */
 231
 232     HandlerObj = Info->Notify.HandlerListHead;
 233     while (HandlerObj)
 234     {
 235         HandlerObj->Notify.Handler (Info->Notify.Node,
 236             Info->Notify.Value,
 237             HandlerObj->Notify.Context);
 238
 239         HandlerObj = HandlerObj->Notify.Next[Info->Notify.HandlerListId];
 240     }
 241
 242     /* All done with the info object */
 243
 244     AcpiUtDeleteGenericState (Info);
 245 }
 246
 247
 248 #if (!ACPI_REDUCED_HARDWARE)
 249 /******************************************************************************
 250  *
 251  * FUNCTION:    AcpiEvTerminate
 252  *
 253  * PARAMETERS:  none
 254  *
 255  * RETURN:      none
 256  *
 257  * DESCRIPTION: Disable events and free memory allocated for table storage.
 258  *
 259  ******************************************************************************/
 260
 261 void
 262 AcpiEvTerminate (
 263     void)
 264 {
 265     UINT32                  i;
 266     ACPI_STATUS             Status;
 267
 268
 269     ACPI_FUNCTION_TRACE (EvTerminate);
 270
 271
 272     if (AcpiGbl_EventsInitialized)
 273     {
 274         /*
 275          * Disable all event-related functionality. In all cases, on error,
 276          * print a message but obviously we don't abort.
 277          */
 278
 279         /* Disable all fixed events */
 280
 281         for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
 282         {
 283             Status = AcpiDisableEvent (i, 0);
 284             if (ACPI_FAILURE (Status))
 285             {
 286                 ACPI_ERROR ((AE_INFO,
 287                     "Could not disable fixed event %u", (UINT32) i));
 288             }
 289         }
 290
 291         /* Disable all GPEs in all GPE blocks */
 292
 293         Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
 294
 295         Status = AcpiEvRemoveGlobalLockHandler ();
 296         if (ACPI_FAILURE(Status))
 297         {
 298             ACPI_ERROR ((AE_INFO,
 299                 "Could not remove Global Lock handler"));
 300         }
 301
 302         AcpiGbl_EventsInitialized = FALSE;
 303     }
 304
 305     /* Remove SCI handlers */
 306
 307     Status = AcpiEvRemoveAllSciHandlers ();
 308     if (ACPI_FAILURE(Status))
 309     {
 310         ACPI_ERROR ((AE_INFO,
 311             "Could not remove SCI handler"));
 312     }
 313
 314     /* Deallocate all handler objects installed within GPE info structs */
 315
 316     Status = AcpiEvWalkGpeList (AcpiEvDeleteGpeHandlers, NULL);
 317
 318     /* Return to original mode if necessary */
 319
 320     if (AcpiGbl_OriginalMode == ACPI_SYS_MODE_LEGACY)
 321     {
 322         Status = AcpiDisable ();
 323         if (ACPI_FAILURE (Status))
 324         {
 325             ACPI_WARNING ((AE_INFO, "AcpiDisable failed"));
 326         }
 327     }
 328     return_VOID;
 329 }
 330
 331 #endif /* !ACPI_REDUCED_HARDWARE */