yaoyaoding commented on code in PR #283: URL: https://github.com/apache/tvm-ffi/pull/283#discussion_r2557665313
########## include/tvm/ffi/extra/cuda/cubin_launcher.h: ########## @@ -0,0 +1,306 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +/*! + * \file tvm/ffi/extra/cubin_launcher.h + * \brief CUDA CUBIN launcher utility for loading and executing CUDA kernels. + * + * This header provides a lightweight C++ wrapper around CUDA Driver API + * for loading CUBIN modules and launching kernels. It supports: + * - Loading CUBIN from memory (embedded data) or files + * - Multi-GPU execution using CUDA primary contexts + * - Kernel parameter management and launch configuration + */ +#ifndef TVM_FFI_EXTRA_CUBIN_LAUNCHER_H_ +#define TVM_FFI_EXTRA_CUBIN_LAUNCHER_H_ + +#include <cuda.h> Review Comment: done ########## include/tvm/ffi/extra/cubin_launcher.h: ########## @@ -0,0 +1,306 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +/*! + * \file tvm/ffi/extra/cubin_launcher.h + * \brief CUDA CUBIN launcher utility for loading and executing CUDA kernels. + * + * This header provides a lightweight C++ wrapper around CUDA Driver API + * for loading CUBIN modules and launching kernels. It supports: + * - Loading CUBIN from memory (embedded data) or files + * - Multi-GPU execution using CUDA primary contexts + * - Kernel parameter management and launch configuration + */ +#ifndef TVM_FFI_EXTRA_CUBIN_LAUNCHER_H_ +#define TVM_FFI_EXTRA_CUBIN_LAUNCHER_H_ + +#include <cuda.h> +#include <tvm/ffi/error.h> +#include <tvm/ffi/extra/c_env_api.h> + +#include <cstdint> +#include <cstring> +#include <fstream> +#include <utility> +#include <vector> + +namespace tvm { +namespace ffi { + +/*! + * \brief Macro for checking CUDA driver API errors. + * + * This macro checks the return value of CUDA driver API calls and throws + * a RuntimeError with detailed error information if the call fails. + * + * \param stmt The CUDA driver API call to check. + */ +#define TVM_FFI_CHECK_CUDA_DRIVER_ERROR(stmt) \ + do { \ + CUresult __err = (stmt); \ + if (__err != CUDA_SUCCESS) { \ + const char* __err_name = nullptr; \ + const char* __err_str = nullptr; \ + cuGetErrorName(__err, &__err_name); \ + cuGetErrorString(__err, &__err_str); \ + TVM_FFI_THROW(RuntimeError) << "CUDA Driver Error: " \ + << (__err_name ? __err_name : "UNKNOWN") << " (" \ + << static_cast<int>(__err) \ + << "): " << (__err_str ? __err_str : "No description") << " at " \ + << __FILE__ << ":" << __LINE__; \ + } \ + } while (0) + +/*! + * \brief A simple 3D dimension type for CUDA kernel launch configuration. + * + * This struct mimics the behavior of dim3 from CUDA Runtime API, but works + * with the CUDA Driver API. It can be constructed from 1, 2, or 3 dimensions. + */ +struct dim3 { + /*! \brief X dimension (number of blocks in x-direction or threads in x-direction) */ + unsigned int x; + /*! \brief Y dimension (number of blocks in y-direction or threads in y-direction) */ + unsigned int y; + /*! \brief Z dimension (number of blocks in z-direction or threads in z-direction) */ + unsigned int z; + + /*! \brief Default constructor initializes to (1, 1, 1) */ + dim3() : x(1), y(1), z(1) {} + + /*! \brief Construct with x dimension, y and z default to 1 */ + explicit dim3(unsigned int x_) : x(x_), y(1), z(1) {} + + /*! \brief Construct with x and y dimensions, z defaults to 1 */ + dim3(unsigned int x_, unsigned int y_) : x(x_), y(y_), z(1) {} + + /*! \brief Construct with all three dimensions */ + dim3(unsigned int x_, unsigned int y_, unsigned int z_) : x(x_), y(y_), z(z_) {} +}; + +// Forward declaration +class CubinKernel; + +/*! + * \brief CUDA CUBIN module loader and manager. + * + * This class provides a RAII wrapper around CUDA driver API's library management. + * It loads a CUBIN module from memory or file and manages the library handle. + * Supports multi-GPU execution using CUDA primary contexts. + */ +class CubinModule { + public: + /*! + * \brief Load CUBIN module from memory. + * + * \param data Pointer to CUBIN binary data in memory. + * \param size Size of the CUBIN binary data in bytes. + * \note Calls cuInit(0) to ensure CUDA is initialized. + */ + CubinModule(const void* data, uint64_t size) { + TVM_FFI_CHECK_CUDA_DRIVER_ERROR(cuInit(0)); + TVM_FFI_CHECK_CUDA_DRIVER_ERROR( + cuLibraryLoadData(&library_, data, nullptr, nullptr, 0, nullptr, nullptr, 0)); + } + + /*! + * \brief Load CUBIN module from file. + * + * \param filename Path to the CUBIN file. + * \note This reads the entire file into memory and then loads it. + */ + explicit CubinModule(const char* filename) { Review Comment: done -- This is an automated message from the Apache Git Service. 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