KokkosNodalBC.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#pragma once
 
#include "KokkosNodalBCBase.h"
 
namespace Moose::Kokkos
{
 
class NodalBC : public NodalBCBase
{
public:
  static InputParameters validParams();
 
  NodalBC(const InputParameters & parameters);
 
  virtual void computeResidual() override;
  virtual void computeJacobian() override;
 
 
  template <typename Derived>
  KOKKOS_FUNCTION Real computeQpJacobian(const unsigned int /* qp */,
                                         AssemblyDatum & /* datum */) const
  {
    return 1;
  }
  template <typename Derived>
  KOKKOS_FUNCTION Real computeQpOffDiagJacobian(const unsigned int /* jvar */,
                                                const unsigned int /* qp */,
                                                AssemblyDatum & /* datum */) const
  {
    ::Kokkos::abort(
        "Default computeQpOffDiagJacobian() should never be called. Make sure you properly "
        "redefined this method in your class without typos.");
 
    return 0;
  }
 
  template <typename Derived>
  static auto defaultJacobian()
  {
    return &NodalBC::computeQpJacobian<Derived>;
  }
  template <typename Derived>
  static auto defaultOffDiagJacobian()
  {
    return &NodalBC::computeQpOffDiagJacobian<Derived>;
  }
 
  template <typename Derived>
  KOKKOS_FUNCTION void operator()(ResidualLoop, const ThreadID tid, const Derived & bc) const;
  template <typename Derived>
  KOKKOS_FUNCTION void operator()(JacobianLoop, const ThreadID tid, const Derived & bc) const;
  template <typename Derived>
  KOKKOS_FUNCTION void
  operator()(OffDiagJacobianLoop, const ThreadID tid, const Derived & bc) const;
 
protected:
  const VariableValue _u;
};
 
template <typename Derived>
KOKKOS_FUNCTION void
NodalBC::operator()(ResidualLoop, const ThreadID tid, const Derived & bc) const
{
  auto node = kokkosBoundaryNodeID(tid);
  auto & sys = kokkosSystem(_kokkos_var.sys());
 
  if (!sys.isNodalDefined(node, _kokkos_var.var()))
    return;
 
  AssemblyDatum datum(node, kokkosAssembly(), kokkosSystems(), _kokkos_var, _kokkos_var.var());
 
  Real local_re = bc.template computeQpResidual<Derived>(0, datum);
 
  accumulateTaggedNodalResidual(false, local_re, node);
}
 
template <typename Derived>
KOKKOS_FUNCTION void
NodalBC::operator()(JacobianLoop, const ThreadID tid, const Derived & bc) const
{
  auto node = kokkosBoundaryNodeID(tid);
  auto & sys = kokkosSystem(_kokkos_var.sys());
 
  if (!sys.isNodalDefined(node, _kokkos_var.var()))
    return;
 
  AssemblyDatum datum(node, kokkosAssembly(), kokkosSystems(), _kokkos_var, _kokkos_var.var());
 
  Real local_ke = bc.template computeQpJacobian<Derived>(0, datum);
 
  // This initializes the row to zero except the diagonal
  accumulateTaggedNodalMatrix(false, local_ke, node, _kokkos_var.var());
}
 
template <typename Derived>
KOKKOS_FUNCTION void
NodalBC::operator()(OffDiagJacobianLoop, const ThreadID tid, const Derived & bc) const
{
  auto node = kokkosBoundaryNodeID(_thread(tid, 1));
  auto & sys = kokkosSystem(_kokkos_var.sys());
  auto jvar = sys.getCoupling(_kokkos_var.var())[_thread(tid, 0)];
 
  if (!sys.isNodalDefined(node, _kokkos_var.var()))
    return;
 
  AssemblyDatum datum(node, kokkosAssembly(), kokkosSystems(), _kokkos_var, jvar);
 
  Real local_ke = bc.template computeQpOffDiagJacobian<Derived>(jvar, 0, datum);
 
  accumulateTaggedNodalMatrix(true, local_ke, node, jvar);
}
 
} // namespace Moose::Kokkos