1/* 2 * Copyright (c) 2001-2007 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 23#include "AppleRAID.h" 24 25#define super AppleRAIDSet 26OSDefineMetaClassAndStructors(AppleRAIDStripeSet, AppleRAIDSet); 27 28AppleRAIDSet * AppleRAIDStripeSet::createRAIDSet(AppleRAIDMember * firstMember) 29{ 30 AppleRAIDStripeSet *raidSet = new AppleRAIDStripeSet; 31 32 IOLog1("AppleRAIDStripeSet::createRAIDSet(%p) called, new set = %p *********\n", firstMember, raidSet); 33 34 while (raidSet){ 35 36 if (!raidSet->init()) break; 37 if (!raidSet->initWithHeader(firstMember->getHeader(), true)) break; 38 if (raidSet->resizeSet(raidSet->getMemberCount())) return raidSet; 39 40 break; 41 } 42 43 if (raidSet) raidSet->release(); 44 45 return 0; 46} 47 48 49bool AppleRAIDStripeSet::init() 50{ 51 IOLog1("AppleRAIDStripeSet::init() called\n"); 52 53 if (super::init() == false) return false; 54 55 setProperty(kAppleRAIDLevelNameKey, kAppleRAIDLevelNameStripe); 56 57 arAllocateRequestMethod = OSMemberFunctionCast(IOCommandGate::Action, this, &AppleRAIDSet::allocateRAIDRequest); 58 59 return true; 60} 61 62void AppleRAIDStripeSet::free(void) 63{ 64 super::free(); 65} 66 67//8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888 68//8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888 69//8888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888 70 71bool AppleRAIDStripeSet::addSpare(AppleRAIDMember * member) 72{ 73 if (super::addSpare(member) == false) return false; 74 75 member->changeMemberState(kAppleRAIDMemberStateBroken); 76 77 return true; 78} 79 80bool AppleRAIDStripeSet::addMember(AppleRAIDMember * member) 81{ 82 if (super::addMember(member) == false) return false; 83 84 // block count = # of stripes * per member block count 85 OSNumber * number = OSDynamicCast(OSNumber, member->getHeaderProperty(kAppleRAIDChunkCountKey)); 86 if (!number) return false; 87 arSetBlockCount = number->unsigned64BitValue() * arMemberCount; 88 arSetMediaSize = arSetBlockCount * arSetBlockSize; 89 90 return true; 91} 92 93bool AppleRAIDStripeSet::startSet(void) 94{ 95 if (super::startSet() == false) return false; 96 97 // scale up these properties by the member count of the stripe 98 setSmallest64BitMemberPropertyFor(kIOMaximumBlockCountReadKey, arMemberCount); 99 setSmallest64BitMemberPropertyFor(kIOMaximumBlockCountWriteKey, arMemberCount); 100 setSmallest64BitMemberPropertyFor(kIOMaximumByteCountReadKey, arMemberCount); 101 setSmallest64BitMemberPropertyFor(kIOMaximumByteCountWriteKey, arMemberCount); 102 103 setSmallest64BitMemberPropertyFor(kIOMaximumSegmentCountReadKey, arMemberCount); 104 setSmallest64BitMemberPropertyFor(kIOMaximumSegmentCountWriteKey, arMemberCount); 105 106 return true; 107} 108 109AppleRAIDMemoryDescriptor * AppleRAIDStripeSet::allocateMemoryDescriptor(AppleRAIDStorageRequest *storageRequest, UInt32 memberIndex) 110{ 111 return AppleRAIDStripeMemoryDescriptor::withStorageRequest(storageRequest, memberIndex); 112} 113 114// AppleRAIDStripeMemoryDescriptor 115// AppleRAIDStripeMemoryDescriptor 116// AppleRAIDStripeMemoryDescriptor 117 118#undef super 119#define super AppleRAIDMemoryDescriptor 120OSDefineMetaClassAndStructors(AppleRAIDStripeMemoryDescriptor, AppleRAIDMemoryDescriptor); 121 122AppleRAIDMemoryDescriptor * 123AppleRAIDStripeMemoryDescriptor::withStorageRequest(AppleRAIDStorageRequest *storageRequest, UInt32 memberIndex) 124{ 125 AppleRAIDMemoryDescriptor *memoryDescriptor = new AppleRAIDStripeMemoryDescriptor; 126 127 if (memoryDescriptor != 0) { 128 if (!memoryDescriptor->initWithStorageRequest(storageRequest, memberIndex)) { 129 memoryDescriptor->release(); 130 memoryDescriptor = 0; 131 } 132 } 133 134 return memoryDescriptor; 135} 136 137bool AppleRAIDStripeMemoryDescriptor::initWithStorageRequest(AppleRAIDStorageRequest *storageRequest, UInt32 memberIndex) 138{ 139 if (!super::initWithStorageRequest(storageRequest, memberIndex)) return false; 140 141 mdMemberCount = storageRequest->srMemberCount; 142 mdSetBlockSize = storageRequest->srSetBlockSize; 143 144 return true; 145} 146 147bool AppleRAIDStripeMemoryDescriptor::configureForMemoryDescriptor(IOMemoryDescriptor *memoryDescriptor, UInt64 byteStart, UInt32 activeIndex) 148{ 149 UInt32 byteCount = memoryDescriptor->getLength(); 150 UInt32 blockCount, memberBlockCount; 151 UInt64 memberBlockStart, setBlockStop; 152 UInt32 setBlockEndOffset; 153 UInt32 startMember, stopMember; 154 155 mdSetBlockStart = byteStart / mdSetBlockSize; 156 mdSetBlockOffset = byteStart % mdSetBlockSize; 157 setBlockStop = (byteStart + byteCount - 1) / mdSetBlockSize; 158 setBlockEndOffset = (byteStart + byteCount - 1) % mdSetBlockSize; 159 blockCount = setBlockStop - mdSetBlockStart + 1; 160 memberBlockCount = blockCount / mdMemberCount; 161 memberBlockStart = mdSetBlockStart / mdMemberCount; 162 startMember = mdSetBlockStart % mdMemberCount; 163 stopMember = setBlockStop % mdMemberCount; 164 165 // per member stuff 166 assert(mdMemberIndex == activeIndex); 167 if (((mdMemberCount + mdMemberIndex - startMember) % mdMemberCount) < (blockCount % mdMemberCount)) memberBlockCount++; 168 169 if (startMember > mdMemberIndex) memberBlockStart++; 170 171 mdMemberByteStart = memberBlockStart * mdSetBlockSize; 172 _length = memberBlockCount * mdSetBlockSize; 173 174 if (startMember == mdMemberIndex) { 175 mdMemberByteStart += mdSetBlockOffset; 176 _length -= mdSetBlockOffset; 177 } 178 179 if (stopMember == mdMemberIndex) _length -= mdSetBlockSize - setBlockEndOffset - 1; 180 181 mdMemoryDescriptor = memoryDescriptor; 182 183 _flags = (_flags & ~kIOMemoryDirectionMask) | memoryDescriptor->getDirection(); 184 185 return _length != 0; 186} 187 188addr64_t AppleRAIDStripeMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *length, IOOptionBits options) 189{ 190 UInt32 memberBlockStart = (mdMemberByteStart + offset) / mdSetBlockSize; 191 UInt32 memberBlockOffset = (mdMemberByteStart + offset) % mdSetBlockSize; 192 UInt32 setBlockNumber = memberBlockStart * mdMemberCount + mdMemberIndex - mdSetBlockStart; 193 IOByteCount setOffset = setBlockNumber * mdSetBlockSize + memberBlockOffset - mdSetBlockOffset; 194 addr64_t physAddress; 195 196 physAddress = mdMemoryDescriptor->getPhysicalSegment(setOffset, length, options); 197 198 memberBlockOffset = mdSetBlockSize - memberBlockOffset; 199 if (length && (*length > memberBlockOffset)) *length = memberBlockOffset; 200 201 return physAddress; 202} 203