Date: 2025-03-28T21:11:01+00:00

Actual source code: matmpidensecupm.hpp

      1: #pragma once

      3: #include <petsc/private/matdensecupmimpl.h>
      4: #include <../src/mat/impls/dense/mpi/mpidense.h>

      6: #include <../src/mat/impls/dense/seq/cupm/matseqdensecupm.hpp>
      7: #include <../src/vec/vec/impls/mpi/cupm/vecmpicupm.hpp>

      9: namespace Petsc
     10: {

     12: namespace mat
     13: {

     15: namespace cupm
     16: {

     18: namespace impl
     19: {

     21: template <device::cupm::DeviceType T>
     22: class PETSC_SINGLE_LIBRARY_VISIBILITY_INTERNAL MatDense_MPI_CUPM : MatDense_CUPM<T, MatDense_MPI_CUPM<T>> {
     23: public:
     24:   MATDENSECUPM_HEADER(T, MatDense_MPI_CUPM<T>);

     26: private:
     27:   PETSC_NODISCARD static constexpr Mat_MPIDense *MatIMPLCast_(Mat) noexcept;
     28:   PETSC_NODISCARD static constexpr MatType       MATIMPLCUPM_() noexcept;

     30:   static PetscErrorCode SetPreallocation_(Mat, PetscDeviceContext, PetscScalar *) noexcept;

     32:   template <bool to_host>
     33:   static PetscErrorCode Convert_Dispatch_(Mat, MatType, MatReuse, Mat *) noexcept;

     35: public:
     36:   PETSC_NODISCARD static constexpr const char *MatConvert_mpidensecupm_mpidense_C() noexcept;

     38:   PETSC_NODISCARD static constexpr const char *MatProductSetFromOptions_mpiaij_mpidensecupm_C() noexcept;
     39:   PETSC_NODISCARD static constexpr const char *MatProductSetFromOptions_mpidensecupm_mpiaij_C() noexcept;

     41:   PETSC_NODISCARD static constexpr const char *MatProductSetFromOptions_mpiaijcupmsparse_mpidensecupm_C() noexcept;
     42:   PETSC_NODISCARD static constexpr const char *MatProductSetFromOptions_mpidensecupm_mpiaijcupmsparse_C() noexcept;

     44:   static PetscErrorCode Create(Mat) noexcept;

     46:   static PetscErrorCode BindToCPU(Mat, PetscBool) noexcept;
     47:   static PetscErrorCode Convert_MPIDenseCUPM_MPIDense(Mat, MatType, MatReuse, Mat *) noexcept;
     48:   static PetscErrorCode Convert_MPIDense_MPIDenseCUPM(Mat, MatType, MatReuse, Mat *) noexcept;

     50:   template <PetscMemType, PetscMemoryAccessMode>
     51:   static PetscErrorCode GetArray(Mat, PetscScalar **, PetscDeviceContext = nullptr) noexcept;
     52:   template <PetscMemType, PetscMemoryAccessMode>
     53:   static PetscErrorCode RestoreArray(Mat, PetscScalar **, PetscDeviceContext = nullptr) noexcept;

     55: private:
     56:   template <PetscMemType mtype, PetscMemoryAccessMode mode>
     57:   static PetscErrorCode GetArrayC_(Mat m, PetscScalar **p) noexcept
     58:   {
     59:     return GetArray<mtype, mode>(m, p);
     60:   }

     62:   template <PetscMemType mtype, PetscMemoryAccessMode mode>
     63:   static PetscErrorCode RestoreArrayC_(Mat m, PetscScalar **p) noexcept
     64:   {
     65:     return RestoreArray<mtype, mode>(m, p);
     66:   }

     68: public:
     69:   template <PetscMemoryAccessMode>
     70:   static PetscErrorCode GetColumnVec(Mat, PetscInt, Vec *) noexcept;
     71:   template <PetscMemoryAccessMode>
     72:   static PetscErrorCode RestoreColumnVec(Mat, PetscInt, Vec *) noexcept;

     74:   static PetscErrorCode PlaceArray(Mat, const PetscScalar *) noexcept;
     75:   static PetscErrorCode ReplaceArray(Mat, const PetscScalar *) noexcept;
     76:   static PetscErrorCode ResetArray(Mat) noexcept;
     77: };

     79: } // namespace impl

     81: namespace
     82: {

     84: // Declare this here so that the functions below can make use of it
     85: template <device::cupm::DeviceType T>
     86: inline PetscErrorCode MatCreateMPIDenseCUPM(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt M, PetscInt N, PetscScalar *data, Mat *A, PetscDeviceContext dctx = nullptr, bool preallocate = true) noexcept
     87: {
     88:   PetscFunctionBegin;
     89:   PetscCall(impl::MatDense_MPI_CUPM<T>::CreateIMPLDenseCUPM(comm, m, n, M, N, data, A, dctx, preallocate));
     90:   PetscFunctionReturn(PETSC_SUCCESS);
     91: }

     93: } // anonymous namespace

     95: namespace impl
     96: {

     98: // ==========================================================================================
     99: // MatDense_MPI_CUPM -- Private API
    100: // ==========================================================================================

    102: template <device::cupm::DeviceType T>
    103: inline constexpr Mat_MPIDense *MatDense_MPI_CUPM<T>::MatIMPLCast_(Mat m) noexcept
    104: {
    105:   return static_cast<Mat_MPIDense *>(m->data);
    106: }

    108: template <device::cupm::DeviceType T>
    109: inline constexpr MatType MatDense_MPI_CUPM<T>::MATIMPLCUPM_() noexcept
    110: {
    111:   return MATMPIDENSECUPM();
    112: }

    114: // ==========================================================================================

    116: template <device::cupm::DeviceType T>
    117: inline PetscErrorCode MatDense_MPI_CUPM<T>::SetPreallocation_(Mat A, PetscDeviceContext dctx, PetscScalar *device_array) noexcept
    118: {
    119:   PetscFunctionBegin;
    120:   if (auto &mimplA = MatIMPLCast(A)->A) {
    121:     PetscCall(MatSetType(mimplA, MATSEQDENSECUPM()));
    122:     PetscCall(MatDense_Seq_CUPM<T>::SetPreallocation(mimplA, dctx, device_array));
    123:   } else {
    124:     PetscCall(MatCreateSeqDenseCUPM<T>(PETSC_COMM_SELF, A->rmap->n, A->cmap->N, device_array, &mimplA, dctx));
    125:   }
    126:   PetscFunctionReturn(PETSC_SUCCESS);
    127: }

    129: template <device::cupm::DeviceType T>
    130: template <bool to_host>
    131: inline PetscErrorCode MatDense_MPI_CUPM<T>::Convert_Dispatch_(Mat M, MatType, MatReuse reuse, Mat *newmat) noexcept
    132: {
    133:   PetscFunctionBegin;
    134:   if (reuse == MAT_INITIAL_MATRIX) {
    135:     PetscCall(MatDuplicate(M, MAT_COPY_VALUES, newmat));
    136:   } else if (reuse == MAT_REUSE_MATRIX) {
    137:     PetscCall(MatCopy(M, *newmat, SAME_NONZERO_PATTERN));
    138:   }
    139:   {
    140:     const auto B    = *newmat;
    141:     const auto pobj = PetscObjectCast(B);

    143:     if (to_host) {
    144:       PetscCall(BindToCPU(B, PETSC_TRUE));
    145:     } else {
    146:       PetscCall(PetscDeviceInitialize(PETSC_DEVICE_CUPM()));
    147:     }

    149:     PetscCall(PetscStrFreeAllocpy(to_host ? VECSTANDARD : VecMPI_CUPM::VECCUPM(), &B->defaultvectype));
    150:     PetscCall(PetscObjectChangeTypeName(pobj, to_host ? MATMPIDENSE : MATMPIDENSECUPM()));

    152:     // ============================================================
    153:     // Composed Ops
    154:     // ============================================================
    155:     MatComposeOp_CUPM(to_host, pobj, MatConvert_mpidensecupm_mpidense_C(), nullptr, Convert_MPIDenseCUPM_MPIDense);
    156:     MatComposeOp_CUPM(to_host, pobj, MatProductSetFromOptions_mpiaij_mpidensecupm_C(), nullptr, MatProductSetFromOptions_MPIAIJ_MPIDense);
    157:     MatComposeOp_CUPM(to_host, pobj, MatProductSetFromOptions_mpiaijcupmsparse_mpidensecupm_C(), nullptr, MatProductSetFromOptions_MPIAIJ_MPIDense);
    158:     MatComposeOp_CUPM(to_host, pobj, MatProductSetFromOptions_mpidensecupm_mpiaij_C(), nullptr, MatProductSetFromOptions_MPIDense_MPIAIJ);
    159:     MatComposeOp_CUPM(to_host, pobj, MatProductSetFromOptions_mpidensecupm_mpiaijcupmsparse_C(), nullptr, MatProductSetFromOptions_MPIDense_MPIAIJ);
    160:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMGetArray_C(), nullptr, GetArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_READ_WRITE>);
    161:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMGetArrayRead_C(), nullptr, GetArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_READ>);
    162:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMGetArrayWrite_C(), nullptr, GetArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_WRITE>);
    163:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMRestoreArray_C(), nullptr, RestoreArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_READ_WRITE>);
    164:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMRestoreArrayRead_C(), nullptr, RestoreArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_READ>);
    165:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMRestoreArrayWrite_C(), nullptr, RestoreArrayC_<PETSC_MEMTYPE_DEVICE, PETSC_MEMORY_ACCESS_WRITE>);
    166:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMPlaceArray_C(), nullptr, PlaceArray);
    167:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMResetArray_C(), nullptr, ResetArray);
    168:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMReplaceArray_C(), nullptr, ReplaceArray);
    169:     MatComposeOp_CUPM(to_host, pobj, MatDenseCUPMSetPreallocation_C(), nullptr, SetPreallocation);

    171:     if (to_host) {
    172:       if (auto &m_A = MatIMPLCast(B)->A) PetscCall(MatConvert(m_A, MATSEQDENSE, MAT_INPLACE_MATRIX, &m_A));
    173:       B->offloadmask = PETSC_OFFLOAD_CPU;
    174:     } else {
    175:       if (auto &m_A = MatIMPLCast(B)->A) {
    176:         PetscCall(MatConvert(m_A, MATSEQDENSECUPM(), MAT_INPLACE_MATRIX, &m_A));
    177:         B->offloadmask = PETSC_OFFLOAD_BOTH;
    178:       } else {
    179:         B->offloadmask = PETSC_OFFLOAD_UNALLOCATED;
    180:       }
    181:       PetscCall(BindToCPU(B, PETSC_FALSE));
    182:     }

    184:     // ============================================================
    185:     // Function Pointer Ops
    186:     // ============================================================
    187:     MatSetOp_CUPM(to_host, B, getdiagonal, MatGetDiagonal_MPIDense, GetDiagonal);
    188:     MatSetOp_CUPM(to_host, B, bindtocpu, nullptr, BindToCPU);
    189:   }
    190:   PetscFunctionReturn(PETSC_SUCCESS);
    191: }

    193: // ==========================================================================================
    194: // MatDense_MPI_CUPM -- Public API
    195: // ==========================================================================================

    197: template <device::cupm::DeviceType T>
    198: inline constexpr const char *MatDense_MPI_CUPM<T>::MatConvert_mpidensecupm_mpidense_C() noexcept
    199: {
    200:   return T == device::cupm::DeviceType::CUDA ? "MatConvert_mpidensecuda_mpidense_C" : "MatConvert_mpidensehip_mpidense_C";
    201: }

    203: template <device::cupm::DeviceType T>
    204: inline constexpr const char *MatDense_MPI_CUPM<T>::MatProductSetFromOptions_mpiaij_mpidensecupm_C() noexcept
    205: {
    206:   return T == device::cupm::DeviceType::CUDA ? "MatProductSetFromOptions_mpiaij_mpidensecuda_C" : "MatProductSetFromOptions_mpiaij_mpidensehip_C";
    207: }

    209: template <device::cupm::DeviceType T>
    210: inline constexpr const char *MatDense_MPI_CUPM<T>::MatProductSetFromOptions_mpidensecupm_mpiaij_C() noexcept
    211: {
    212:   return T == device::cupm::DeviceType::CUDA ? "MatProductSetFromOptions_mpidensecuda_mpiaij_C" : "MatProductSetFromOptions_mpidensehip_mpiaij_C";
    213: }

    215: template <device::cupm::DeviceType T>
    216: inline constexpr const char *MatDense_MPI_CUPM<T>::MatProductSetFromOptions_mpiaijcupmsparse_mpidensecupm_C() noexcept
    217: {
    218:   return T == device::cupm::DeviceType::CUDA ? "MatProductSetFromOptions_mpiaijcusparse_mpidensecuda_C" : "MatProductSetFromOptions_mpiaijhipsparse_mpidensehip_C";
    219: }

    221: template <device::cupm::DeviceType T>
    222: inline constexpr const char *MatDense_MPI_CUPM<T>::MatProductSetFromOptions_mpidensecupm_mpiaijcupmsparse_C() noexcept
    223: {
    224:   return T == device::cupm::DeviceType::CUDA ? "MatProductSetFromOptions_mpidensecuda_mpiaijcusparse_C" : "MatProductSetFromOptions_mpidensehip_mpiaijhipsparse_C";
    225: }

    227: // ==========================================================================================

    229: template <device::cupm::DeviceType T>
    230: inline PetscErrorCode MatDense_MPI_CUPM<T>::Create(Mat A) noexcept
    231: {
    232:   PetscFunctionBegin;
    233:   PetscCall(MatCreate_MPIDense(A));
    234:   PetscCall(Convert_MPIDense_MPIDenseCUPM(A, MATMPIDENSECUPM(), MAT_INPLACE_MATRIX, &A));
    235:   PetscFunctionReturn(PETSC_SUCCESS);
    236: }

    238: // ==========================================================================================

    240: template <device::cupm::DeviceType T>
    241: inline PetscErrorCode MatDense_MPI_CUPM<T>::BindToCPU(Mat A, PetscBool usehost) noexcept
    242: {
    243:   const auto mimpl = MatIMPLCast(A);
    244:   const auto pobj  = PetscObjectCast(A);

    246:   PetscFunctionBegin;
    247:   PetscCheck(!mimpl->vecinuse, PetscObjectComm(pobj), PETSC_ERR_ORDER, "Need to call MatDenseRestoreColumnVec() first");
    248:   PetscCheck(!mimpl->matinuse, PetscObjectComm(pobj), PETSC_ERR_ORDER, "Need to call MatDenseRestoreSubMatrix() first");
    249:   if (const auto mimpl_A = mimpl->A) PetscCall(MatBindToCPU(mimpl_A, usehost));
    250:   A->boundtocpu = usehost;
    251:   PetscCall(PetscStrFreeAllocpy(usehost ? PETSCRANDER48 : PETSCDEVICERAND(), &A->defaultrandtype));
    252:   if (!usehost) {
    253:     PetscBool iscupm;

    255:     PetscCall(PetscObjectTypeCompare(PetscObjectCast(mimpl->cvec), VecMPI_CUPM::VECMPICUPM(), &iscupm));
    256:     if (!iscupm) PetscCall(VecDestroy(&mimpl->cvec));
    257:     PetscCall(PetscObjectTypeCompare(PetscObjectCast(mimpl->cmat), MATMPIDENSECUPM(), &iscupm));
    258:     if (!iscupm) PetscCall(MatDestroy(&mimpl->cmat));
    259:   }

    261:   MatComposeOp_CUPM(usehost, pobj, "MatDenseGetColumnVec_C", MatDenseGetColumnVec_MPIDense, GetColumnVec<PETSC_MEMORY_ACCESS_READ_WRITE>);
    262:   MatComposeOp_CUPM(usehost, pobj, "MatDenseRestoreColumnVec_C", MatDenseRestoreColumnVec_MPIDense, RestoreColumnVec<PETSC_MEMORY_ACCESS_READ_WRITE>);
    263:   MatComposeOp_CUPM(usehost, pobj, "MatDenseGetColumnVecRead_C", MatDenseGetColumnVecRead_MPIDense, GetColumnVec<PETSC_MEMORY_ACCESS_READ>);
    264:   MatComposeOp_CUPM(usehost, pobj, "MatDenseRestoreColumnVecRead_C", MatDenseRestoreColumnVecRead_MPIDense, RestoreColumnVec<PETSC_MEMORY_ACCESS_READ>);
    265:   MatComposeOp_CUPM(usehost, pobj, "MatDenseGetColumnVecWrite_C", MatDenseGetColumnVecWrite_MPIDense, GetColumnVec<PETSC_MEMORY_ACCESS_WRITE>);
    266:   MatComposeOp_CUPM(usehost, pobj, "MatDenseRestoreColumnVecWrite_C", MatDenseRestoreColumnVecWrite_MPIDense, RestoreColumnVec<PETSC_MEMORY_ACCESS_WRITE>);

    268:   MatSetOp_CUPM(usehost, A, shift, MatShift_MPIDense, Shift);

    270:   if (const auto mimpl_cmat = mimpl->cmat) PetscCall(MatBindToCPU(mimpl_cmat, usehost));
    271:   PetscFunctionReturn(PETSC_SUCCESS);
    272: }

    274: template <device::cupm::DeviceType T>
    275: inline PetscErrorCode MatDense_MPI_CUPM<T>::Convert_MPIDenseCUPM_MPIDense(Mat M, MatType mtype, MatReuse reuse, Mat *newmat) noexcept
    276: {
    277:   PetscFunctionBegin;
    278:   PetscCall(Convert_Dispatch_</* to host */ true>(M, mtype, reuse, newmat));
    279:   PetscFunctionReturn(PETSC_SUCCESS);
    280: }

    282: template <device::cupm::DeviceType T>
    283: inline PetscErrorCode MatDense_MPI_CUPM<T>::Convert_MPIDense_MPIDenseCUPM(Mat M, MatType mtype, MatReuse reuse, Mat *newmat) noexcept
    284: {
    285:   PetscFunctionBegin;
    286:   PetscCall(Convert_Dispatch_</* to host */ false>(M, mtype, reuse, newmat));
    287:   PetscFunctionReturn(PETSC_SUCCESS);
    288: }

    290: // ==========================================================================================

    292: template <device::cupm::DeviceType T>
    293: template <PetscMemType, PetscMemoryAccessMode access>
    294: inline PetscErrorCode MatDense_MPI_CUPM<T>::GetArray(Mat A, PetscScalar **array, PetscDeviceContext dctx) noexcept
    295: {
    296:   auto &mimplA = MatIMPLCast(A)->A;

    298:   PetscFunctionBegin;
    299:   if (!mimplA) PetscCall(MatCreateSeqDenseCUPM<T>(PETSC_COMM_SELF, A->rmap->n, A->cmap->N, nullptr, &mimplA, dctx));
    300:   PetscCall(MatDenseCUPMGetArray_Private<T, access>(mimplA, array));
    301:   PetscFunctionReturn(PETSC_SUCCESS);
    302: }

    304: template <device::cupm::DeviceType T>
    305: template <PetscMemType, PetscMemoryAccessMode access>
    306: inline PetscErrorCode MatDense_MPI_CUPM<T>::RestoreArray(Mat A, PetscScalar **array, PetscDeviceContext) noexcept
    307: {
    308:   PetscFunctionBegin;
    309:   PetscCall(MatDenseCUPMRestoreArray_Private<T, access>(MatIMPLCast(A)->A, array));
    310:   PetscFunctionReturn(PETSC_SUCCESS);
    311: }

    313: // ==========================================================================================

    315: template <device::cupm::DeviceType T>
    316: template <PetscMemoryAccessMode access>
    317: inline PetscErrorCode MatDense_MPI_CUPM<T>::GetColumnVec(Mat A, PetscInt col, Vec *v) noexcept
    318: {
    319:   using namespace vec::cupm;

    321:   const auto mimpl   = MatIMPLCast(A);
    322:   const auto mimpl_A = mimpl->A;
    323:   const auto pobj    = PetscObjectCast(A);
    324:   PetscInt   lda;

    326:   PetscFunctionBegin;
    327:   PetscCheck(!mimpl->vecinuse, PetscObjectComm(pobj), PETSC_ERR_ORDER, "Need to call MatDenseRestoreColumnVec() first");
    328:   PetscCheck(!mimpl->matinuse, PetscObjectComm(pobj), PETSC_ERR_ORDER, "Need to call MatDenseRestoreSubMatrix() first");
    329:   mimpl->vecinuse = col + 1;

    331:   if (!mimpl->cvec) PetscCall(MatDenseCreateColumnVec_Private(A, &mimpl->cvec));

    333:   PetscCall(MatDenseGetLDA(mimpl_A, &lda));
    334:   PetscCall(MatDenseCUPMGetArray_Private<T, access>(mimpl_A, const_cast<PetscScalar **>(&mimpl->ptrinuse)));
    335:   PetscCall(VecCUPMPlaceArrayAsync<T>(mimpl->cvec, mimpl->ptrinuse + static_cast<std::size_t>(col) * static_cast<std::size_t>(lda)));

    337:   if (access == PETSC_MEMORY_ACCESS_READ) PetscCall(VecLockReadPush(mimpl->cvec));
    338:   *v = mimpl->cvec;
    339:   PetscFunctionReturn(PETSC_SUCCESS);
    340: }

    342: template <device::cupm::DeviceType T>
    343: template <PetscMemoryAccessMode access>
    344: inline PetscErrorCode MatDense_MPI_CUPM<T>::RestoreColumnVec(Mat A, PetscInt, Vec *v) noexcept
    345: {
    346:   using namespace vec::cupm;

    348:   const auto mimpl = MatIMPLCast(A);
    349:   const auto cvec  = mimpl->cvec;

    351:   PetscFunctionBegin;
    352:   PetscCheck(mimpl->vecinuse, PETSC_COMM_SELF, PETSC_ERR_ORDER, "Need to call MatDenseGetColumnVec() first");
    353:   PetscCheck(cvec, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Missing internal column vector");
    354:   mimpl->vecinuse = 0;

    356:   PetscCall(MatDenseCUPMRestoreArray_Private<T, access>(mimpl->A, const_cast<PetscScalar **>(&mimpl->ptrinuse)));
    357:   if (access == PETSC_MEMORY_ACCESS_READ) PetscCall(VecLockReadPop(cvec));
    358:   PetscCall(VecCUPMResetArrayAsync<T>(cvec));

    360:   if (v) *v = nullptr;
    361:   PetscFunctionReturn(PETSC_SUCCESS);
    362: }

    364: // ==========================================================================================

    366: template <device::cupm::DeviceType T>
    367: inline PetscErrorCode MatDense_MPI_CUPM<T>::PlaceArray(Mat A, const PetscScalar *array) noexcept
    368: {
    369:   const auto mimpl = MatIMPLCast(A);

    371:   PetscFunctionBegin;
    372:   PetscCheck(!mimpl->vecinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreColumnVec() first");
    373:   PetscCheck(!mimpl->matinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreSubMatrix() first");
    374:   PetscCall(MatDenseCUPMPlaceArray<T>(mimpl->A, array));
    375:   PetscFunctionReturn(PETSC_SUCCESS);
    376: }

    378: template <device::cupm::DeviceType T>
    379: inline PetscErrorCode MatDense_MPI_CUPM<T>::ReplaceArray(Mat A, const PetscScalar *array) noexcept
    380: {
    381:   const auto mimpl = MatIMPLCast(A);

    383:   PetscFunctionBegin;
    384:   PetscCheck(!mimpl->vecinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreColumnVec() first");
    385:   PetscCheck(!mimpl->matinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreSubMatrix() first");
    386:   PetscCall(MatDenseCUPMReplaceArray<T>(mimpl->A, array));
    387:   PetscFunctionReturn(PETSC_SUCCESS);
    388: }

    390: template <device::cupm::DeviceType T>
    391: inline PetscErrorCode MatDense_MPI_CUPM<T>::ResetArray(Mat A) noexcept
    392: {
    393:   const auto mimpl = MatIMPLCast(A);

    395:   PetscFunctionBegin;
    396:   PetscCheck(!mimpl->vecinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreColumnVec() first");
    397:   PetscCheck(!mimpl->matinuse, PetscObjectComm(PetscObjectCast(A)), PETSC_ERR_ORDER, "Need to call MatDenseRestoreSubMatrix() first");
    398:   PetscCall(MatDenseCUPMResetArray<T>(mimpl->A));
    399:   PetscFunctionReturn(PETSC_SUCCESS);
    400: }

    402: } // namespace impl

    404: namespace
    405: {

    407: template <device::cupm::DeviceType T>
    408: inline PetscErrorCode MatCreateDenseCUPM(MPI_Comm comm, PetscInt n, PetscInt m, PetscInt N, PetscInt M, PetscScalar *data, Mat *A, PetscDeviceContext dctx = nullptr) noexcept
    409: {
    410:   PetscMPIInt size;

    412:   PetscFunctionBegin;
    413:   PetscAssertPointer(A, 7);
    414:   PetscCallMPI(MPI_Comm_size(comm, &size));
    415:   if (size > 1) {
    416:     PetscCall(MatCreateMPIDenseCUPM<T>(comm, n, m, N, M, data, A, dctx));
    417:   } else {
    418:     if (n == PETSC_DECIDE) n = N;
    419:     if (m == PETSC_DECIDE) m = M;
    420:     // It's OK here if both are PETSC_DECIDE since PetscSplitOwnership() will catch that down
    421:     // the line
    422:     PetscCall(MatCreateSeqDenseCUPM<T>(comm, n, m, data, A, dctx));
    423:   }
    424:   PetscFunctionReturn(PETSC_SUCCESS);
    425: }

    427: } // anonymous namespace

    429: } // namespace cupm

    431: } // namespace mat

    433: } // namespace Petsc