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 "ceed-cuda-common.h" 9 10 #include <ceed.h> 11 #include <ceed/backend.h> 12 #include <cublas_v2.h> 13 #include <cuda_runtime.h> 14 #include <stdlib.h> 15 #include <string.h> 16 17 //------------------------------------------------------------------------------ 18 // Get root resource without device spec 19 //------------------------------------------------------------------------------ 20 int CeedCudaGetResourceRoot(Ceed ceed, const char *resource, char **resource_root) { 21 char *device_spec = strstr(resource, ":device_id="); 22 size_t resource_root_len = device_spec ? (size_t)(device_spec - resource) + 1 : strlen(resource) + 1; 23 CeedCallBackend(CeedCalloc(resource_root_len, resource_root)); 24 memcpy(*resource_root, resource, resource_root_len - 1); 25 26 return CEED_ERROR_SUCCESS; 27 } 28 29 //------------------------------------------------------------------------------ 30 // Device information backend init 31 //------------------------------------------------------------------------------ 32 int CeedCudaInit(Ceed ceed, const char *resource) { 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 CeedCallCuda(ceed, cudaGetDevice(¤t_device_id)); 38 if (device_id >= 0 && current_device_id != device_id) { 39 CeedCallCuda(ceed, cudaSetDevice(device_id)); 40 current_device_id = device_id; 41 } 42 Ceed_Cuda *data; 43 CeedCallBackend(CeedGetData(ceed, &data)); 44 data->device_id = current_device_id; 45 CeedCallCuda(ceed, cudaGetDeviceProperties(&data->device_prop, current_device_id)); 46 return CEED_ERROR_SUCCESS; 47 } 48 49 //------------------------------------------------------------------------------ 50 // Backend destroy 51 //------------------------------------------------------------------------------ 52 int CeedDestroy_Cuda(Ceed ceed) { 53 Ceed_Cuda *data; 54 CeedCallBackend(CeedGetData(ceed, &data)); 55 if (data->cublas_handle) CeedCallCublas(ceed, cublasDestroy(data->cublas_handle)); 56 CeedCallBackend(CeedFree(&data)); 57 return CEED_ERROR_SUCCESS; 58 } 59 60 //------------------------------------------------------------------------------ 61