1 // Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors. 2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3 // 4 // SPDX-License-Identifier: BSD-2-Clause 5 // 6 // This file is part of CEED: http://github.com/ceed 7 8 #include <string.h> 9 #include "ceed-cuda-common.h" 10 11 //------------------------------------------------------------------------------ 12 // Get root resource without device spec 13 //------------------------------------------------------------------------------ 14 int CeedCudaGetResourceRoot(Ceed ceed, const char *resource, 15 char **resource_root) { 16 int ierr; 17 18 char *device_spec = strstr(resource, ":device_id="); 19 size_t resource_root_len = device_spec 20 ? (size_t)(device_spec - resource) + 1 21 : strlen(resource) + 1; 22 ierr = CeedCalloc(resource_root_len, resource_root); CeedChkBackend(ierr); 23 memcpy(*resource_root, resource, resource_root_len - 1); 24 25 return CEED_ERROR_SUCCESS; 26 } 27 28 //------------------------------------------------------------------------------ 29 // Device information backend init 30 //------------------------------------------------------------------------------ 31 int CeedCudaInit(Ceed ceed, const char *resource) { 32 int ierr; 33 const char *device_spec = strstr(resource, ":device_id="); 34 const int device_id = (device_spec) ? atoi(device_spec + 11) : -1; 35 36 int current_device_id; 37 ierr = cudaGetDevice(¤t_device_id); CeedChk_Cu(ceed, ierr); 38 if (device_id >= 0 && current_device_id != device_id) { 39 ierr = cudaSetDevice(device_id); CeedChk_Cu(ceed, ierr); 40 current_device_id = device_id; 41 } 42 Ceed_Cuda *data; 43 ierr = CeedGetData(ceed, &data); CeedChkBackend(ierr); 44 data->device_id = current_device_id; 45 ierr = cudaGetDeviceProperties(&data->device_prop, current_device_id); 46 CeedChk_Cu(ceed, ierr); 47 return CEED_ERROR_SUCCESS; 48 } 49 50 //------------------------------------------------------------------------------ 51 // Backend destroy 52 //------------------------------------------------------------------------------ 53 int CeedDestroy_Cuda(Ceed ceed) { 54 int ierr; 55 Ceed_Cuda *data; 56 ierr = CeedGetData(ceed, &data); CeedChkBackend(ierr); 57 if (data->cublas_handle) { 58 ierr = cublasDestroy(data->cublas_handle); CeedChk_Cublas(ceed, ierr); 59 } 60 ierr = CeedFree(&data); CeedChkBackend(ierr); 61 return CEED_ERROR_SUCCESS; 62 } 63 64 //------------------------------------------------------------------------------ 65