1 /* 2 * Copyright (c) 1998-2010 Apple 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 #include <IOKit/IOInterruptAccountingPrivate.h> 35 36 #if IOKITSTATS 37 38 #define IOStatisticsInitializeCounter() \ 39 do { \ 40 IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsFilterInterruptEventSourceCounter); \ 41 } while (0) 42 43 #define IOStatisticsInterrupt() \ 44 do { \ 45 IOStatistics::countInterrupt(IOEventSource::reserved->counter); \ 46 } while (0) 47 48 #else 49 50 #define IOStatisticsInitializeCounter() 51 #define IOStatisticsInterrupt() 52 53 #endif /* IOKITSTATS */ 54 55 #define super IOInterruptEventSource 56 57 OSDefineMetaClassAndStructors 58 (IOFilterInterruptEventSource, IOInterruptEventSource) 59 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 0); 60 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 1); 61 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 2); 62 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 3); 63 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 4); 64 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 5); 65 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 6); 66 OSMetaClassDefineReservedUnused(IOFilterInterruptEventSource, 7); 67 68 /* 69 * Implement the call throughs for the private protection conversion 70 */ 71 bool IOFilterInterruptEventSource::init(OSObject *inOwner, 72 Action inAction, 73 IOService *inProvider, 74 int inIntIndex) 75 { 76 return false; 77 } 78 79 IOInterruptEventSource * 80 IOFilterInterruptEventSource::interruptEventSource(OSObject *inOwner, 81 Action inAction, 82 IOService *inProvider, 83 int inIntIndex) 84 { 85 return 0; 86 } 87 88 bool 89 IOFilterInterruptEventSource::init(OSObject *inOwner, 90 Action inAction, 91 Filter inFilterAction, 92 IOService *inProvider, 93 int inIntIndex) 94 { 95 if ( !super::init(inOwner, inAction, inProvider, inIntIndex) ) 96 return false; 97 98 if (!inFilterAction) 99 return false; 100 101 filterAction = inFilterAction; 102 103 IOStatisticsInitializeCounter(); 104 105 return true; 106 } 107 108 IOFilterInterruptEventSource *IOFilterInterruptEventSource 109 ::filterInterruptEventSource(OSObject *inOwner, 110 Action inAction, 111 Filter inFilterAction, 112 IOService *inProvider, 113 int inIntIndex) 114 { 115 IOFilterInterruptEventSource *me = new IOFilterInterruptEventSource; 116 117 if (me 118 && !me->init(inOwner, inAction, inFilterAction, inProvider, inIntIndex)) { 119 me->release(); 120 return 0; 121 } 122 123 return me; 124 } 125 126 void IOFilterInterruptEventSource::signalInterrupt() 127 { 128 bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false; 129 130 IOStatisticsInterrupt(); 131 producerCount++; 132 133 if (trace) 134 IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner); 135 136 signalWorkAvailable(); 137 138 if (trace) 139 IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner); 140 141 } 142 143 144 IOFilterInterruptEventSource::Filter 145 IOFilterInterruptEventSource::getFilterAction() const 146 { 147 return filterAction; 148 } 149 150 151 152 153 void IOFilterInterruptEventSource::normalInterruptOccurred 154 (void */*refcon*/, IOService */*prov*/, int /*source*/) 155 { 156 bool filterRes; 157 uint64_t startTime = 0; 158 uint64_t endTime = 0; 159 bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false; 160 161 if (trace) 162 IOTimeStampStartConstant(IODBG_INTES(IOINTES_FILTER), 163 VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop); 164 165 if (IOInterruptEventSource::reserved->statistics) { 166 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) { 167 startTime = mach_absolute_time(); 168 } 169 } 170 171 // Call the filter. 172 filterRes = (*filterAction)(owner, this); 173 174 if (IOInterruptEventSource::reserved->statistics) { 175 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) { 176 IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1); 177 } 178 179 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) { 180 endTime = mach_absolute_time(); 181 IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelTimeIndex], endTime - startTime); 182 } 183 } 184 185 if (trace) 186 IOTimeStampEndConstant(IODBG_INTES(IOINTES_FILTER), 187 VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop); 188 189 if (filterRes) 190 signalInterrupt(); 191 } 192 193 void IOFilterInterruptEventSource::disableInterruptOccurred 194 (void */*refcon*/, IOService *prov, int source) 195 { 196 bool filterRes; 197 uint64_t startTime = 0; 198 uint64_t endTime = 0; 199 bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false; 200 201 if (trace) 202 IOTimeStampStartConstant(IODBG_INTES(IOINTES_FILTER), 203 VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop); 204 205 if (IOInterruptEventSource::reserved->statistics) { 206 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) { 207 startTime = mach_absolute_time(); 208 } 209 } 210 211 // Call the filter. 212 filterRes = (*filterAction)(owner, this); 213 214 if (IOInterruptEventSource::reserved->statistics) { 215 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) { 216 IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1); 217 } 218 219 if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) { 220 endTime = mach_absolute_time(); 221 IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelTimeIndex], endTime - startTime); 222 } 223 } 224 225 if (trace) 226 IOTimeStampEndConstant(IODBG_INTES(IOINTES_FILTER), 227 VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop); 228 229 if (filterRes) { 230 prov->disableInterrupt(source); /* disable the interrupt */ 231 signalInterrupt(); 232 } 233 } 234