/*
 * Copyright (c) 2020-2023, NVIDIA CORPORATION. All rights reserved.
 *
 * Licensed 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.
 */

#ifndef CUDA_DRIVER_WRAPPER_H
#define CUDA_DRIVER_WRAPPER_H

#include <cstdio>
#include <cuda.h>

#define cuErrCheck(stat, wrap)                                                                                         \
    {                                                                                                                  \
        cuErrCheck_((stat), wrap, __FILE__, __LINE__);                                                                 \
    }

namespace tensorrt_llm
{
namespace common
{

class CUDADriverWrapper
{
public:
    CUDADriverWrapper();

    ~CUDADriverWrapper();

    CUresult cuGetErrorName(CUresult error, char const** pStr) const;

    CUresult cuFuncSetAttribute(CUfunction hfunc, CUfunction_attribute attrib, int value) const;

    CUresult cuLinkComplete(CUlinkState state, void** cubinOut, size_t* sizeOut) const;

    CUresult cuModuleUnload(CUmodule hmod) const;

    CUresult cuLinkDestroy(CUlinkState state) const;

    CUresult cuModuleLoadData(CUmodule* module, void const* image) const;

    CUresult cuLinkCreate(
        unsigned int numOptions, CUjit_option* options, void** optionValues, CUlinkState* stateOut) const;

    CUresult cuModuleGetFunction(CUfunction* hfunc, CUmodule hmod, char const* name) const;

    CUresult cuModuleGetGlobal(CUdeviceptr* dptr, size_t* bytes, CUmodule hmod, char const* name) const;

    CUresult cuLinkAddFile(CUlinkState state, CUjitInputType type, char const* path, unsigned int numOptions,
        CUjit_option* options, void** optionValues) const;

    CUresult cuLinkAddData(CUlinkState state, CUjitInputType type, void* data, size_t size, char const* name,
        unsigned int numOptions, CUjit_option* options, void** optionValues) const;

    CUresult cuLaunchCooperativeKernel(CUfunction f, unsigned int gridDimX, unsigned int gridDimY,
        unsigned int gridDimZ, unsigned int blockDimX, unsigned int blockDimY, unsigned int blockDimZ,
        unsigned int sharedMemBytes, CUstream hStream, void** kernelParams) const;

    CUresult cuLaunchKernel(CUfunction f, unsigned int gridDimX, unsigned int gridDimY, unsigned int gridDimZ,
        unsigned int blockDimX, unsigned int blockDimY, unsigned int blockDimZ, unsigned int sharedMemBytes,
        CUstream hStream, void** kernelParams, void** extra) const;

private:
    void* handle;
    CUresult (*_cuGetErrorName)(CUresult, char const**);
    CUresult (*_cuFuncSetAttribute)(CUfunction, CUfunction_attribute, int);
    CUresult (*_cuLinkComplete)(CUlinkState, void**, size_t*);
    CUresult (*_cuModuleUnload)(CUmodule);
    CUresult (*_cuLinkDestroy)(CUlinkState);
    CUresult (*_cuLinkCreate)(unsigned int, CUjit_option*, void**, CUlinkState*);
    CUresult (*_cuModuleLoadData)(CUmodule*, void const*);
    CUresult (*_cuModuleGetFunction)(CUfunction*, CUmodule, char const*);
    CUresult (*_cuModuleGetGlobal)(CUdeviceptr*, size_t*, CUmodule, char const*);
    CUresult (*_cuLinkAddFile)(CUlinkState, CUjitInputType, char const*, unsigned int, CUjit_option*, void**);
    CUresult (*_cuLinkAddData)(
        CUlinkState, CUjitInputType, void*, size_t, char const*, unsigned int, CUjit_option*, void**);
    CUresult (*_cuLaunchCooperativeKernel)(CUfunction, unsigned int, unsigned int, unsigned int, unsigned int,
        unsigned int, unsigned int, unsigned int, CUstream, void**);
    CUresult (*_cuLaunchKernel)(CUfunction f, unsigned int gridDimX, unsigned int gridDimY, unsigned int gridDimZ,
        unsigned int blockDimX, unsigned int blockDimY, unsigned int blockDimZ, unsigned int sharedMemBytes,
        CUstream hStream, void** kernelParams, void** extra);
};

inline void cuErrCheck_(CUresult stat, CUDADriverWrapper const& wrap, char const* file, int line)
{
    if (stat != CUDA_SUCCESS)
    {
        char const* msg = nullptr;
        wrap.cuGetErrorName(stat, &msg);
        fprintf(stderr, "CUDA Error: %s %s %d\n", msg, file, line);
    }
}

} // namespace common
} // namespace tensorrt_llm

#endif // CUDA_DRIVER_WRAPPER_H