+/*
+ * This file is part of the GROMACS molecular simulation package.
+ *
+ * Copyright (c) 2020, by the GROMACS development team, led by
+ * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
+ * and including many others, as listed in the AUTHORS file in the
+ * top-level source directory and at http://www.gromacs.org.
+ *
+ * GROMACS is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * of the License, or (at your option) any later version.
+ *
+ * GROMACS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
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+ */
+/*! \internal \file
+ *
+ * \brief This file contains function declarations necessary for
+ * mananging the PP side of PME-only ranks.
+ *
+ * \author Berk Hess <hess@kth.se>
+ * \author Mark Abraham <mark.j.abraham@gmail.com>
+ * \ingroup module_ewald
+ */
+
+#ifndef GMX_EWALD_PME_PP_H
+#define GMX_EWALD_PME_PP_H
+
+#include "gromacs/math/vectypes.h"
+#include "gromacs/utility/basedefinitions.h"
+
+struct gmx_wallcycle;
+struct interaction_const_t;
+struct t_commrec;
+struct t_forcerec;
+
+class GpuEventSynchronizer;
+
+namespace gmx
+{
+class ForceWithVirial;
+class PmePpCommGpu;
+} // namespace gmx
+
+/*! \brief Send the charges and maxshift to out PME-only node. */
+void gmx_pme_send_parameters(const t_commrec* cr,
+ const interaction_const_t* ic,
+ gmx_bool bFreeEnergy_q,
+ gmx_bool bFreeEnergy_lj,
+ real* chargeA,
+ real* chargeB,
+ real* sqrt_c6A,
+ real* sqrt_c6B,
+ real* sigmaA,
+ real* sigmaB,
+ int maxshift_x,
+ int maxshift_y);
+
+/*! \brief Send the coordinates to our PME-only node and request a PME calculation */
+void gmx_pme_send_coordinates(t_forcerec* fr,
+ const t_commrec* cr,
+ const matrix box,
+ const rvec* x,
+ real lambda_q,
+ real lambda_lj,
+ gmx_bool bEnerVir,
+ int64_t step,
+ bool useGpuPmePpComms,
+ bool reinitGpuPmePpComms,
+ bool sendCoordinatesFromGpu,
+ GpuEventSynchronizer* coordinatesReadyOnDeviceEvent,
+ gmx_wallcycle* wcycle);
+
+/*! \brief Tell our PME-only node to finish */
+void gmx_pme_send_finish(const t_commrec* cr);
+
+/*! \brief Tell our PME-only node to reset all cycle and flop counters */
+void gmx_pme_send_resetcounters(const t_commrec* cr, int64_t step);
+
+/*! \brief PP nodes receive the long range forces from the PME nodes */
+void gmx_pme_receive_f(gmx::PmePpCommGpu* pmePpCommGpu,
+ const t_commrec* cr,
+ gmx::ForceWithVirial* forceWithVirial,
+ real* energy_q,
+ real* energy_lj,
+ real* dvdlambda_q,
+ real* dvdlambda_lj,
+ bool useGpuPmePpComms,
+ bool receivePmeForceToGpu,
+ float* pme_cycles);
+
+/*! \brief Tell our PME-only node to switch to a new grid size */
+void gmx_pme_send_switchgrid(const t_commrec* cr, ivec grid_size, real ewaldcoeff_q, real ewaldcoeff_lj);
+
+#endif