1 // Copyright (c) 2017-2024, 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.h> 9 #include <ceed/backend.h> 10 #include <ceed/jit-tools.h> 11 #include <string.h> 12 13 #include <iostream> 14 #include <sstream> 15 16 #include "../hip/ceed-hip-common.h" 17 #include "../hip/ceed-hip-compile.h" 18 #include "ceed-hip-ref.h" 19 20 //------------------------------------------------------------------------------ 21 // Build QFunction kernel 22 //------------------------------------------------------------------------------ 23 extern "C" int CeedQFunctionBuildKernel_Hip_ref(CeedQFunction qf) { 24 using std::ostringstream; 25 using std::string; 26 27 Ceed ceed; 28 Ceed_Hip *ceed_Hip; 29 CeedInt num_input_fields, num_output_fields, size; 30 CeedQFunctionField *input_fields, *output_fields; 31 CeedQFunction_Hip *data; 32 33 CeedCallBackend(CeedQFunctionGetCeed(qf, &ceed)); 34 CeedCallBackend(CeedGetData(ceed, &ceed_Hip)); 35 CeedCallBackend(CeedQFunctionGetData(qf, (void **)&data)); 36 37 // QFunction is built 38 if (data->QFunction) return CEED_ERROR_SUCCESS; 39 40 // QFunction kernel generation 41 CeedCallBackend(CeedQFunctionGetFields(qf, &num_input_fields, &input_fields, &num_output_fields, &output_fields)); 42 43 // Build strings for final kernel 44 string qfunction_name(data->qfunction_name); 45 string kernel_name = "CeedKernelHipRefQFunction_" + qfunction_name; 46 ostringstream code; 47 48 // Definitions 49 code << "// QFunction source\n"; 50 code << "#include <ceed/jit-source/hip/hip-ref-qfunction.h>\n\n"; 51 { 52 const char *source_path; 53 54 CeedCallBackend(CeedQFunctionGetSourcePath(qf, &source_path)); 55 CeedCheck(source_path, ceed, CEED_ERROR_BACKEND, "No QFunction source or hipFunction_t provided."); 56 57 code << "// User QFunction source\n"; 58 code << "#include \"" << source_path << "\"\n\n"; 59 } 60 code << "extern \"C\" __launch_bounds__(BLOCK_SIZE)\n"; 61 code << "__global__ void " << kernel_name << "(void *ctx, CeedInt Q, Fields_Hip fields) {\n"; 62 63 // Inputs 64 code << " // Input fields\n"; 65 for (CeedInt i = 0; i < num_input_fields; i++) { 66 CeedCallBackend(CeedQFunctionFieldGetSize(input_fields[i], &size)); 67 code << " const CeedInt size_input_" << i << " = " << size << ";\n"; 68 code << " CeedScalar input_" << i << "[size_input_" << i << "];\n"; 69 } 70 code << " const CeedScalar *inputs[" << CeedIntMax(num_input_fields, 1) << "];\n"; 71 for (CeedInt i = 0; i < num_input_fields; i++) { 72 code << " inputs[" << i << "] = input_" << i << ";\n"; 73 } 74 code << "\n"; 75 76 // Outputs 77 code << " // Output fields\n"; 78 for (CeedInt i = 0; i < num_output_fields; i++) { 79 CeedCallBackend(CeedQFunctionFieldGetSize(output_fields[i], &size)); 80 code << " const CeedInt size_output_" << i << " = " << size << ";\n"; 81 code << " CeedScalar output_" << i << "[size_output_" << i << "];\n"; 82 } 83 code << " CeedScalar *outputs[" << CeedIntMax(num_output_fields, 1) << "];\n"; 84 for (CeedInt i = 0; i < num_output_fields; i++) { 85 code << " outputs[" << i << "] = output_" << i << ";\n"; 86 } 87 code << "\n"; 88 89 // Loop over quadrature points 90 code << " // Loop over quadrature points\n"; 91 code << " for (CeedInt q = blockIdx.x * blockDim.x + threadIdx.x; q < Q; q += blockDim.x * gridDim.x) {\n"; 92 93 // Load inputs 94 code << " // -- Load inputs\n"; 95 for (CeedInt i = 0; i < num_input_fields; i++) { 96 code << " readQuads<size_input_" << i << ">(q, Q, fields.inputs[" << i << "], input_" << i << ");\n"; 97 } 98 code << "\n"; 99 100 // QFunction 101 code << " // -- Call QFunction\n"; 102 code << " " << qfunction_name << "(ctx, 1, inputs, outputs);\n\n"; 103 104 // Write outputs 105 code << " // -- Write outputs\n"; 106 for (CeedInt i = 0; i < num_output_fields; i++) { 107 code << " writeQuads<size_output_" << i << ">(q, Q, output_" << i << ", fields.outputs[" << i << "]);\n"; 108 } 109 code << " }\n"; 110 code << "}\n"; 111 112 // View kernel for debugging 113 CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "Generated QFunction Kernels:\n"); 114 CeedDebug(ceed, code.str().c_str()); 115 116 // Compile kernel 117 CeedCallBackend(CeedCompile_Hip(ceed, code.str().c_str(), &data->module, 1, "BLOCK_SIZE", ceed_Hip->opt_block_size)); 118 CeedCallBackend(CeedGetKernel_Hip(ceed, data->module, kernel_name.c_str(), &data->QFunction)); 119 return CEED_ERROR_SUCCESS; 120 } 121 122 //------------------------------------------------------------------------------ 123