1241a4b83SYohann // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC. 2241a4b83SYohann // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707. 3241a4b83SYohann // All Rights reserved. See files LICENSE and NOTICE for details. 4241a4b83SYohann // 5241a4b83SYohann // This file is part of CEED, a collection of benchmarks, miniapps, software 6241a4b83SYohann // libraries and APIs for efficient high-order finite element and spectral 7241a4b83SYohann // element discretizations for exascale applications. For more information and 8241a4b83SYohann // source code availability see http://github.com/ceed. 9241a4b83SYohann // 10241a4b83SYohann // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC, 11241a4b83SYohann // a collaborative effort of two U.S. Department of Energy organizations (Office 12241a4b83SYohann // of Science and the National Nuclear Security Administration) responsible for 13241a4b83SYohann // the planning and preparation of a capable exascale ecosystem, including 14241a4b83SYohann // software, applications, hardware, advanced system engineering and early 15241a4b83SYohann // testbed platforms, in support of the nation's exascale computing imperative. 16241a4b83SYohann 17241a4b83SYohann #include <ceed-backend.h> 18241a4b83SYohann #include <string.h> 19241a4b83SYohann #include <stdarg.h> 20241a4b83SYohann #include <nvrtc.h> 21241a4b83SYohann #include <cuda.h> 22241a4b83SYohann #include <cuda_runtime.h> 23241a4b83SYohann #include "ceed-cuda-gen.h" 24241a4b83SYohann 25241a4b83SYohann static int CeedGetPreferredMemType_Cuda_gen(CeedMemType *type) { 26241a4b83SYohann *type = CEED_MEM_DEVICE; 27241a4b83SYohann return 0; 28241a4b83SYohann } 29241a4b83SYohann 30241a4b83SYohann static int CeedInit_Cuda_gen(const char *resource, Ceed ceed) { 31241a4b83SYohann int ierr; 32241a4b83SYohann const int nrc = 9; // number of characters in resource 33241a4b83SYohann if (strncmp(resource, "/gpu/cuda/gen", nrc)) 34241a4b83SYohann return CeedError(ceed, 1, "Cuda backend cannot use resource: %s", resource); 35241a4b83SYohann 36241a4b83SYohann Ceed ceedshared; 37241a4b83SYohann CeedInit("/gpu/cuda/shared", &ceedshared); 38241a4b83SYohann ierr = CeedSetDelegate(ceed, ceedshared); CeedChk(ierr); 39241a4b83SYohann 40241a4b83SYohann const int rlen = strlen(resource); 41241a4b83SYohann const bool slash = (rlen>nrc) ? (resource[nrc] == '/') : false; 42241a4b83SYohann const int deviceID = (slash && rlen > nrc + 1) ? atoi(&resource[nrc + 1]) : 0; 43241a4b83SYohann 44241a4b83SYohann ierr = cudaSetDevice(deviceID); CeedChk(ierr); 45241a4b83SYohann 46241a4b83SYohann Ceed_Cuda_gen *data; 47241a4b83SYohann ierr = CeedCalloc(1,&data); CeedChk(ierr); 48241a4b83SYohann 49241a4b83SYohann ierr = CeedSetData(ceed,(void *)&data); CeedChk(ierr); 50241a4b83SYohann ierr = CeedSetBackendFunction(ceed, "Ceed", ceed, "GetPreferredMemType", 51241a4b83SYohann CeedGetPreferredMemType_Cuda_gen); CeedChk(ierr); 52241a4b83SYohann ierr = CeedSetBackendFunction(ceed, "Ceed", ceed, "QFunctionCreate", 53241a4b83SYohann CeedQFunctionCreate_Cuda_gen); CeedChk(ierr); 54241a4b83SYohann ierr = CeedSetBackendFunction(ceed, "Ceed", ceed, "OperatorCreate", 55241a4b83SYohann CeedOperatorCreate_Cuda_gen); CeedChk(ierr); 56241a4b83SYohann ierr = CeedSetBackendFunction(ceed, "Ceed", ceed, "CompositeOperatorCreate", 57*288c0443SJeremy L Thompson CeedCompositeOperatorCreate_Cuda_gen); 58*288c0443SJeremy L Thompson CeedChk(ierr); 59241a4b83SYohann return 0; 60241a4b83SYohann } 61241a4b83SYohann 62241a4b83SYohann __attribute__((constructor)) 63241a4b83SYohann static void Register(void) { 64241a4b83SYohann CeedRegister("/gpu/cuda/gen", CeedInit_Cuda_gen, 40); 65241a4b83SYohann } 66