iokit/Kernel/IODMACommand.cpp

992     IODMACommandInternal * internalState = fInternalState;
1005     UInt64 offset    = *offsetP + internalState->fPreparedOffset;
1006     UInt64 memLength = internalState->fPreparedOffset + internalState->fPreparedLength;
1011     if ((offset == internalState->fPreparedOffset) || (offset != state->fOffset) || internalState->fNewMD) {
1014 	internalState->fNextRemapPage  = NULL;
1015 	internalState->fNewMD	       = false;
1042 	    if (internalState->fMapContig && internalState->fLocalMapperPageAlloc)
1044 		state->fIOVMAddr = internalState->fLocalMapperPageAlloc + offset;
1067 		    internalState->fCopyMD ? internalState->fCopyMD : fMemory;
1103 		if (internalState->fCursor)
1130 		    remap = internalState->fNextRemapPage;
1134 		    else for (remap = internalState->fCopyPageAlloc;
1144 		    internalState->fNextRemapPage = vm_page_get_next(remap);
1170 	    if (internalState->fCursor
1171 		&& (0 != (internalState->fSourceAlignMask & curSeg.fIOVMAddr)))
1205 	*offsetP       = offset - internalState->fPreparedOffset;