// Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors.
// All Rights Reserved. See the top-level LICENSE and NOTICE files for details.
//
// SPDX-License-Identifier: BSD-2-Clause
//
// This file is part of CEED:  http://github.com/ceed

#ifndef _ceed_hip_h
#define _ceed_hip_h

#include <ceed/ceed.h>
#include <ceed/backend.h>
#include <hip/hip_runtime.h>
#include <hipblas.h>
#include "../hip/ceed-hip-common.h"

typedef struct {
  CeedScalar *h_array;
  CeedScalar *h_array_borrowed;
  CeedScalar *h_array_owned;
  CeedScalar *d_array;
  CeedScalar *d_array_borrowed;
  CeedScalar *d_array_owned;
} CeedVector_Hip;

typedef struct {
  hipModule_t module;
  hipFunction_t StridedTranspose;
  hipFunction_t StridedNoTranspose;
  hipFunction_t OffsetTranspose;
  hipFunction_t OffsetNoTranspose;
  CeedInt num_nodes;
  CeedInt *h_ind;
  CeedInt *h_ind_allocated;
  CeedInt *d_ind;
  CeedInt *d_ind_allocated;
  CeedInt *d_t_offsets;
  CeedInt *d_t_indices;
  CeedInt *d_l_vec_indices;
} CeedElemRestriction_Hip;

typedef struct {
  hipModule_t module;
  hipFunction_t Interp;
  hipFunction_t Grad;
  hipFunction_t Weight;
  CeedScalar *d_interp_1d;
  CeedScalar *d_grad_1d;
  CeedScalar *d_q_weight_1d;
} CeedBasis_Hip;

typedef struct {
  hipModule_t module;
  hipFunction_t Interp;
  hipFunction_t Grad;
  hipFunction_t Weight;
  CeedScalar *d_interp;
  CeedScalar *d_grad;
  CeedScalar *d_q_weight;
} CeedBasisNonTensor_Hip;

// We use a struct to avoid having to memCpy the array of pointers
// __global__ copies by value the struct.
typedef struct {
  const CeedScalar *inputs[CEED_FIELD_MAX];
  CeedScalar *outputs[CEED_FIELD_MAX];
} Fields_Hip;

typedef struct {
  hipModule_t module;
  char *qfunction_name;
  char *qfunction_source;
  hipFunction_t QFunction;
  Fields_Hip fields;
  void *d_c;
} CeedQFunction_Hip;

typedef struct {
  void *h_data;
  void *h_data_borrowed;
  void *h_data_owned;
  void *d_data;
  void *d_data_borrowed;
  void *d_data_owned;
} CeedQFunctionContext_Hip;

typedef struct {
  hipModule_t module;
  hipFunction_t linearDiagonal;
  hipFunction_t linearPointBlock;
  CeedBasis basisin, basisout;
  CeedElemRestriction diagrstr, pbdiagrstr;
  CeedVector elemdiag, pbelemdiag;
  CeedInt numemodein, numemodeout, nnodes;
  CeedEvalMode *h_emodein, *h_emodeout;
  CeedEvalMode *d_emodein, *d_emodeout;
  CeedScalar *d_identity, *d_interpin, *d_interpout, *d_gradin, *d_gradout;
} CeedOperatorDiag_Hip;

typedef struct {
  hipModule_t module;
  hipFunction_t linearAssemble;
  CeedInt nelem, block_size_x, block_size_y, elemsPerBlock;
  CeedScalar *d_B_in, *d_B_out;
} CeedOperatorAssemble_Hip;

typedef struct {
  CeedVector *evecs;   // E-vectors, inputs followed by outputs
  CeedVector *qvecsin;    // Input Q-vectors needed to apply operator
  CeedVector *qvecsout;   // Output Q-vectors needed to apply operator
  CeedInt    numein;
  CeedInt    numeout;
  CeedInt    qfnumactivein, qfnumactiveout;
  CeedVector *qfactivein;
  CeedOperatorDiag_Hip *diag;
  CeedOperatorAssemble_Hip *asmb;
} CeedOperator_Hip;

CEED_INTERN int CeedHipGetHipblasHandle(Ceed ceed, hipblasHandle_t *handle);

CEED_INTERN int CeedVectorCreate_Hip(CeedSize n, CeedVector vec);

CEED_INTERN int CeedElemRestrictionCreate_Hip(CeedMemType mtype,
    CeedCopyMode cmode, const CeedInt *indices, CeedElemRestriction r);

CEED_INTERN int CeedElemRestrictionCreateBlocked_Hip(const CeedMemType mtype,
    const CeedCopyMode cmode, const CeedInt *indices,
    const CeedElemRestriction res);

CEED_INTERN int CeedBasisApplyElems_Hip(CeedBasis basis, const CeedInt nelem,
                                        CeedTransposeMode tmode, CeedEvalMode emode, const CeedVector u, CeedVector v);

CEED_INTERN int CeedQFunctionApplyElems_Hip(CeedQFunction qf, const CeedInt Q,
    const CeedVector *const u, const CeedVector *v);

CEED_INTERN int CeedBasisCreateTensorH1_Hip(CeedInt dim, CeedInt P1d,
    CeedInt Q1d,
    const CeedScalar *interp1d,
    const CeedScalar *grad1d,
    const CeedScalar *qref1d,
    const CeedScalar *qweight1d,
    CeedBasis basis);

CEED_INTERN int CeedBasisCreateH1_Hip(CeedElemTopology, CeedInt, CeedInt,
                                      CeedInt, const CeedScalar *,
                                      const CeedScalar *, const CeedScalar *,
                                      const CeedScalar *, CeedBasis);

CEED_INTERN int CeedQFunctionCreate_Hip(CeedQFunction qf);

CEED_INTERN int CeedQFunctionContextCreate_Hip(CeedQFunctionContext ctx);

CEED_INTERN int CeedOperatorCreate_Hip(CeedOperator op);

CEED_INTERN int CeedCompositeOperatorCreate_Hip(CeedOperator op);
#endif