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/ceed.h> 9 #include <ceed/backend.h> 10 #include <ceed/jit-tools.h> 11 #include <iostream> 12 #include <sstream> 13 #include <string.h> 14 #include "ceed-hip-ref.h" 15 #include "../hip/ceed-hip-compile.h" 16 17 //------------------------------------------------------------------------------ 18 // Build QFunction kernel 19 //------------------------------------------------------------------------------ 20 extern "C" int CeedHipBuildQFunction(CeedQFunction qf) { 21 CeedInt ierr; 22 using std::ostringstream; 23 using std::string; 24 Ceed ceed; 25 CeedQFunctionGetCeed(qf, &ceed); 26 Ceed_Hip *ceed_Hip; 27 ierr = CeedGetData(ceed, &ceed_Hip); CeedChkBackend(ierr); 28 CeedQFunction_Hip *data; 29 ierr = CeedQFunctionGetData(qf, (void **)&data); CeedChkBackend(ierr); 30 31 // QFunction is built 32 if (data->QFunction) 33 return CEED_ERROR_SUCCESS; 34 35 if (!data->qfunction_source) 36 // LCOV_EXCL_START 37 return CeedError(ceed, CEED_ERROR_BACKEND, 38 "No QFunction source or hipFunction_t provided."); 39 // LCOV_EXCL_STOP 40 41 // QFunction kernel generation 42 CeedInt num_input_fields, num_output_fields, size; 43 CeedQFunctionField *input_fields, *output_fields; 44 ierr = CeedQFunctionGetFields(qf, &num_input_fields, &input_fields, 45 &num_output_fields, &output_fields); 46 CeedChkBackend(ierr); 47 48 // Build strings for final kernel 49 char *read_write_kernel_path, *read_write_kernel_source; 50 ierr = CeedGetJitAbsolutePath(ceed, "ceed/jit-source/hip/hip-ref-qfunction.h", 51 &read_write_kernel_path); CeedChkBackend(ierr); 52 CeedDebug256(ceed, 2, "----- Loading QFunction Read/Write Kernel Source -----\n"); 53 ierr = CeedLoadSourceToBuffer(ceed, read_write_kernel_path, &read_write_kernel_source); 54 CeedChkBackend(ierr); 55 CeedDebug256(ceed, 2, "----- Loading QFunction Read/Write Kernel Source Complete! -----\n"); 56 string qfunction_source(data->qfunction_source); 57 string qfunction_name(data->qfunction_name); 58 string read_write(read_write_kernel_source); 59 string kernel_name = "CeedKernel_Hip_ref_" + qfunction_name; 60 ostringstream code; 61 62 // Defintions 63 code << read_write; 64 code << qfunction_source; 65 code << "\n"; 66 code << "extern \"C\" __launch_bounds__(BLOCK_SIZE)\n"; 67 code << "__global__ void " << kernel_name << "(void *ctx, CeedInt Q, Fields_Hip fields) {\n"; 68 69 // Inputs 70 code << " // Input fields\n"; 71 for (CeedInt i = 0; i < num_input_fields; i++) { 72 ierr = CeedQFunctionFieldGetSize(input_fields[i], &size); CeedChkBackend(ierr); 73 code << " const CeedInt size_input_" << i << " = " << size << ";\n"; 74 code << " CeedScalar input_" << i << "[size_input_" << i << "];\n"; 75 } 76 code << " const CeedScalar* inputs[" << num_input_fields << "];\n"; 77 for (CeedInt i = 0; i < num_input_fields; i++) { 78 code << " inputs[" << i << "] = input_" << i << ";\n"; 79 } 80 code << "\n"; 81 82 // Outputs 83 code << " // Output fields\n"; 84 for (CeedInt i = 0; i < num_output_fields; i++) { 85 ierr = CeedQFunctionFieldGetSize(output_fields[i], &size); CeedChkBackend(ierr); 86 code << " const CeedInt size_output_" << i << " = " << size << ";\n"; 87 code << " CeedScalar output_" << i << "[size_output_" << i << "];\n"; 88 } 89 code << " CeedScalar* outputs[" << num_output_fields << "];\n"; 90 for (CeedInt i = 0; i < num_output_fields; i++) { 91 code << " outputs[" << i << "] = output_" << i << ";\n"; 92 } 93 code << "\n"; 94 95 // Loop over quadrature points 96 code << " // Loop over quadrature points\n"; 97 code << " for (CeedInt q = blockIdx.x * blockDim.x + threadIdx.x; q < Q; q += blockDim.x * gridDim.x) {\n"; 98 99 // Load inputs 100 code << " // -- Load inputs\n"; 101 for (CeedInt i = 0; i < num_input_fields; i++) { 102 code << " readQuads<size_input_" << i << ">(q, Q, fields.inputs[" << i << "], input_" << i << ");\n"; 103 } 104 code << "\n"; 105 106 // QFunction 107 code << " // -- Call QFunction\n"; 108 code << " " << qfunction_name << "(ctx, 1, inputs, outputs);\n\n"; 109 110 // Write outputs 111 code << " // -- Write outputs\n"; 112 for (CeedInt i = 0; i < num_output_fields; i++) { 113 code << " writeQuads<size_output_" << i << ">(q, Q, output_" << i << ", fields.outputs[" << i << "]);\n"; 114 } 115 code << " }\n"; 116 code << "}\n"; 117 118 // View kernel for debugging 119 CeedDebug256(ceed, 2, "Generated QFunction Kernels:\n"); 120 CeedDebug(ceed, code.str().c_str()); 121 122 // Compile kernel 123 ierr = CeedCompileHip(ceed, code.str().c_str(), &data->module, 124 1, "BLOCK_SIZE", ceed_Hip->opt_block_size); 125 CeedChkBackend(ierr); 126 ierr = CeedGetKernelHip(ceed, data->module, kernel_name.c_str(), &data->QFunction); 127 CeedChkBackend(ierr); 128 129 // Cleanup 130 ierr = CeedFree(&data->qfunction_source); CeedChkBackend(ierr); 131 ierr = CeedFree(&read_write_kernel_path); CeedChkBackend(ierr); 132 ierr = CeedFree(&read_write_kernel_source); CeedChkBackend(ierr); 133 134 return CEED_ERROR_SUCCESS; 135 } 136 //------------------------------------------------------------------------------ 137