HalpDmaGetTranslationEntries

_HALP_DMA_TRANSLATION_ENTRY *__fastcall HalpDmaGetTranslationEntries(
        _HALP_DMA_ADAPTER_OBJECT *Adapter,
        _HALP_DMA_MAP_BUFFER_TYPE Type,
        UINT64 EntriesNeeded){
  _HALP_DMA_TRANSLATION_ENTRY *result; 
  __int64 v4; 
  _HALP_DMA_ADAPTER_OBJECT *v6; 
  __int64 v7; 
  __int64 v8; 
  __int64 *v9; 
  unsigned int v10; 
  __int64 i; 
  unsigned int v12; 
  _HALP_DMA_TRANSLATION_ENTRY *v13; 
  __int64 v14; 
  __int64 v15; 
  unsigned int v16; 
  __int64 v17; 
  unsigned __int64 OldIrql; 
  __int64 NewTranslationBuffer; 
  struct _KLOCK_QUEUE_HANDLE LockHandle; 
  result = 0i64;
  v4 = (unsigned int)EntriesNeeded;
  v6 = Adapter;
  memset(&LockHandle, 0, sizeof(LockHandle));
  if( Type == HalpDmaContiguousMapBuffer )
  {
    v7 = 56i64;
    goto LABEL_3;
  }
  if( Type == HalpDmaNonContiguousMapBuffer )
  {
    v7 = 72i64;
LABEL_3:
    KeAcquireInStackQueuedSpinLock((UINT64 *)Adapter + 16, &LockHandle);
    v8 = *(_QWORD *)((char *)v6 + v7);
    if( v8 )
    {
      v9 = *(__int64 **)((char *)v6 + v7);
      v10 = *(_DWORD *)(v8 + 8) - *(_DWORD *)((char *)v6 + v7 + 8);
      for( i = *(_QWORD *)v8; i; i = *(_QWORD *)i )
      {
        v10 += *(_DWORD *)(i + 8);
        v9 = (__int64 *)i;
      }
      if( v10 >= (unsigned int)v4 )
        goto LABEL_7;
    }
    else
    {
      v10 = 0;
      v9 = 0i64;
    }
    NewTranslationBuffer = HalpDmaAllocateNewTranslationBuffer((__int64)v6, (unsigned int)v4 - v10);
    if( !NewTranslationBuffer )
    {
      KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockHandle);
      OldIrql = LockHandle.OldIrql;
      result = 0i64;
LABEL_16:
      __writecr8(OldIrql);
      return result;
    }
    if( v9 )
    {
      *v9 = NewTranslationBuffer;
    }
    else
    {
      v8 = NewTranslationBuffer;
      if( Type )
        *((_QWORD *)v6 + 6) = NewTranslationBuffer;
      else
        *((_QWORD *)v6 + 5) = NewTranslationBuffer;
    }
LABEL_7:
    v12 = *(_DWORD *)((char *)v6 + v7 + 8);
    v13 = 0i64;
    v14 = 0i64;
    v15 = 0i64;
    if( (_DWORD)v4 )
    {
      v16 = *(_DWORD *)(v8 + 8);
      do
      {
        if( v12 >= v16 )
        {
          v8 = *(_QWORD *)v8;
          v12 = 0;
          v16 = *(_DWORD *)(v8 + 8);
        }
        v17 = *(_QWORD *)(v8 + 16);
        v15 = v17 + 72i64 * v12;
        if( v13 )
          *(_QWORD *)(v14 + 8) = v15;
        else
          v13 = (_HALP_DMA_TRANSLATION_ENTRY *)(v17 + 72i64 * v12);
        memset(v17 + 72i64 * v12++, 0i64);
        *(_QWORD *)(v15 + 56) = v15;
        v14 = v15;
        --v4;
      }
      while( v4 );
      v6 = Adapter;
    }
    *(_QWORD *)((char *)v6 + v7) = v8;
    *(_DWORD *)((char *)v6 + v7 + 8) = v12;
    *(_QWORD *)(v15 + 8) = 0i64;
    KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockHandle);
    OldIrql = LockHandle.OldIrql;
    result = v13;
    goto LABEL_16;
  }
  return result;
}

Referenced by: