iokit/Kernel/IOFilterInterruptEventSource.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <IOKit/IOFilterInterruptEventSource.h>
  30 #include <IOKit/IOService.h>
  31 #include <IOKit/IOKitDebug.h>
  32 #include <IOKit/IOTimeStamp.h>
  33 #include <IOKit/IOWorkLoop.h>
  34
  35 #define super IOInterruptEventSource
  36
  37 OSDefineMetaClassAndStructors
  38     (IOFilterInterruptEventSource, IOInterruptEventSource)
  39 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 0);
  40 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 1);
  41 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 2);
  42 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 3);
  43 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 4);
  44 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 5);
  45 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 6);
  46 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 7);
  47
  48 /*
  49  * Implement the call throughs for the private protection conversion
  50  */
  51 bool IOFilterInterruptEventSource::init(OSObject *inOwner,
  52                                         Action inAction,
  53                                         IOService *inProvider,
  54                                         int inIntIndex)
  55 {
  56     return false;
  57 }
  58
  59 IOInterruptEventSource *
  60 IOFilterInterruptEventSource::interruptEventSource(OSObject *inOwner,
  61                                                    Action inAction,
  62                                                    IOService *inProvider,
  63                                                    int inIntIndex)
  64 {
  65     return 0;
  66 }
  67
  68 bool
  69 IOFilterInterruptEventSource::init(OSObject *inOwner,
  70                                    Action inAction,
  71                                    Filter inFilterAction,
  72                                    IOService *inProvider,
  73                                    int inIntIndex)
  74 {
  75     if ( !super::init(inOwner, inAction, inProvider, inIntIndex) )
  76         return false;
  77
  78     if (!inFilterAction)
  79         return false;
  80
  81     filterAction = inFilterAction;
  82     return true;
  83 }
  84
  85 IOFilterInterruptEventSource *IOFilterInterruptEventSource
  86 ::filterInterruptEventSource(OSObject *inOwner,
  87                              Action inAction,
  88                              Filter inFilterAction,
  89                              IOService *inProvider,
  90                              int inIntIndex)
  91 {
  92     IOFilterInterruptEventSource *me = new IOFilterInterruptEventSource;
  93
  94     if (me
  95     && !me->init(inOwner, inAction, inFilterAction, inProvider, inIntIndex)) {
  96         me->release();
  97         return 0;
  98     }
  99
 100     return me;
 101 }
 102
 103 void IOFilterInterruptEventSource::signalInterrupt()
 104 {
 105         bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
 106
 107     producerCount++;
 108
 109         if (trace)
 110             IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
 111
 112     signalWorkAvailable();
 113
 114         if (trace)
 115             IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
 116
 117 }
 118
 119
 120 IOFilterInterruptEventSource::Filter
 121 IOFilterInterruptEventSource::getFilterAction() const
 122 {
 123     return filterAction;
 124 }
 125
 126
 127
 128
 129 void IOFilterInterruptEventSource::normalInterruptOccurred
 130     (void */*refcon*/, IOService */*prov*/, int /*source*/)
 131 {
 132     bool filterRes;
 133         bool    trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
 134
 135         if (trace)
 136                 IOTimeStampStartConstant(IODBG_INTES(IOINTES_FILTER),
 137                                                                  (uintptr_t) filterAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
 138
 139     // Call the filter.
 140     filterRes = (*filterAction)(owner, this);
 141
 142         if (trace)
 143                 IOTimeStampEndConstant(IODBG_INTES(IOINTES_FILTER),
 144                                                            (uintptr_t) filterAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
 145
 146     if (filterRes)
 147         signalInterrupt();
 148 }
 149
 150 void IOFilterInterruptEventSource::disableInterruptOccurred
 151     (void */*refcon*/, IOService *prov, int source)
 152 {
 153     bool filterRes;
 154         bool    trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
 155
 156         if (trace)
 157                 IOTimeStampStartConstant(IODBG_INTES(IOINTES_FILTER),
 158                                                                  (uintptr_t) filterAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
 159
 160     // Call the filter.
 161     filterRes = (*filterAction)(owner, this);
 162
 163         if (trace)
 164                 IOTimeStampEndConstant(IODBG_INTES(IOINTES_FILTER),
 165                                                            (uintptr_t) filterAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
 166
 167     if (filterRes) {
 168         prov->disableInterrupt(source); /* disable the interrupt */
 169         signalInterrupt();
 170     }
 171 }