HalpDmaAllocateMapRegistersAtHighLevel

__int64 __fastcall HalpDmaAllocateMapRegistersAtHighLevel(__int64 a1, int *a2){
  char v2; 
  char v3; 
  int v4; 
  __int64 v6; 
  int v8; 
  __int64 v9; 
  bool v10; 
  __int64 result; 
  __int64 ScatterPagesFromScatterPoolAtHighLevel; 
  __int64 v13; 
  __int64 v14; 
  unsigned int v15; 
  __int64 ScatterPagesFromContiguousPoolAtHighLevelV2; 
  __int64 v17; 
  __int64 **v18; 
  __int64 **v19; 
  __int64 v20; 
  __int64 v21; 
  __int64 v22; 
  __int64 v23; 
  _QWORD *v24; 
  __int64 v25; 
  int v26; 
  int v27; 
  v2 = *(_BYTE *)(a1 + 434);
  v3 = 0;
  v4 = *a2;
  v6 = *(_QWORD *)(a1 + 152);
  v26 = 0;
  v8 = 0;
  v27 = 0;
  v9 = 0i64;
  if( v2 )
  {
    if( *(_QWORD *)(a1 + 104) )
      goto LABEL_32;
    v10 = *(_DWORD *)(a1 + 112) == 0;
  }
  else
  {
    if( *(_QWORD *)(a1 + 88) )
      goto LABEL_32;
    v10 = *(_DWORD *)(a1 + 96) == 0;
  }
  if( v10 )
  {
    if( !*(_BYTE *)(a1 + 337) )
    {
      if( v2 )
      {
        result = HalpDmaAllocateScatterPagesFromScatterPoolAtHighLevel(a1);
        v8 = v27;
        v9 = result;
        if( v27 == v4 )
          return result;
      }
      else
      {
        result = HalpDmaAllocateContiguousPagesFromContiguousPoolAtHighLevel(a1);
        v9 = result;
        if( result )
          return result;
      }
    }
    if( *(_BYTE *)(a1 + 434) )
    {
      ScatterPagesFromScatterPoolAtHighLevel = HalpDmaAllocateScatterPagesFromScatterPoolAtHighLevel(a1);
      if( ScatterPagesFromScatterPoolAtHighLevel )
      {
        v13 = HalpDmaPrependTranslations(ScatterPagesFromScatterPoolAtHighLevel, v26, v9);
        v8 += v26;
        v9 = v13;
        v27 = v8;
      }
      if( v8 == v4 )
        return v9;
      if( (unsigned int)HalpDmaGetAdapterVersion(a1) == 2 )
        ScatterPagesFromContiguousPoolAtHighLevelV2 = HalpDmaAllocateScatterPagesFromContiguousPoolAtHighLevelV2(
                                                        v14,
                                                        v6,
                                                        v15,
                                                        (unsigned int *)&v26);
      else
        ScatterPagesFromContiguousPoolAtHighLevelV2 = HalpDmaAllocateScatterPagesFromContiguousPoolAtHighLevelV3(
                                                        v14,
                                                        v6,
                                                        v15,
                                                        (unsigned int *)&v26);
      if( ScatterPagesFromContiguousPoolAtHighLevelV2 )
      {
        v17 = HalpDmaPrependTranslations(ScatterPagesFromContiguousPoolAtHighLevelV2, v26, v9);
        v8 += v26;
        v9 = v17;
        v27 = v8;
      }
      if( v8 == v4 )
        return v9;
    }
    else
    {
      result = HalpDmaAllocateContiguousPagesFromContiguousPoolAtHighLevel(a1);
      v9 = result;
      if( result )
        return result;
    }
    if( HalpHiberInProgress )
    {
      if( *(_BYTE *)(a1 + 434) )
      {
        *a2 = v27;
      }
      else if( !v9 )
      {
        *a2 = 0;
      }
      return v9;
    }
    v8 = v27;
  }
LABEL_32:
  if( *(_BYTE *)(a1 + 434) )
  {
    v18 = (__int64 **)(a1 + 104);
    v19 = (__int64 **)(v6 + 104);
    while( 1 )
    {
      if( *(_BYTE *)(a1 + 337) )
      {
        v9 = 0i64;
      }
      else
      {
        result = HalpDmaForceAllocation((__int64)&v27, *(__int64 **)(a1 + 48), v18, v4, 0, &v27);
        v8 = v27;
        v9 = result;
        if( v27 == v4 )
          return result;
        v19 = (__int64 **)(v6 + 104);
      }
      v20 = HalpDmaForceAllocation((__int64)v19, *(__int64 **)(v6 + 48), v19, v4 - v8, 0, &v26);
      if( v20 )
      {
        v22 = HalpDmaPrependTranslations(v20, v26, v9);
        v8 += v26;
        v9 = v22;
        v27 = v8;
      }
      if( v8 == v4 )
        return v9;
      v23 = HalpDmaForceAllocation(v21, *(__int64 **)(v6 + 40), (__int64 **)(v6 + 88), v4 - v8, 0, &v26);
      if( v23 )
      {
        v25 = HalpDmaPrependTranslations(v23, v26, v9);
        v8 += v26;
        v24 = (_QWORD *)(v6 + 88);
        v27 = v8;
        v9 = v25;
      }
      if( v8 == v4 )
        return v9;
      if( v3 )
        goto LABEL_50;
      *(_DWORD *)(a1 + 112) = 0;
      v18 = (__int64 **)(a1 + 104);
      *(_QWORD *)(a1 + 104) = 0i64;
      v19 = (__int64 **)(v6 + 104);
      *(_QWORD *)(v6 + 104) = 0i64;
      v3 = 1;
      *(_DWORD *)(v6 + 112) = 0;
      *v24 = 0i64;
      *(_DWORD *)(v6 + 96) = 0;
    }
  }
  if( *(_BYTE *)(a1 + 337)
    || (result = HalpDmaForceAllocation(a1, *(__int64 **)(a1 + 40), (__int64 **)(a1 + 88), v4, 1, 0i64)) == 0 )
  {
    result = HalpDmaForceAllocation(a1, *(__int64 **)(v6 + 40), (__int64 **)(v6 + 88), v4, 1, 0i64);
    if( !result )
    {
LABEL_50:
      *a2 = 0;
      return 0i64;
    }
  }
  return result;
}

Referenced by: