/**
* Copyright (c) 2025 Huawei Technologies Co., Ltd.
* This program is free software, you can redistribute it and/or modify it under the terms and conditions of
* CANN Open Software License Agreement Version 2.0 (the "License").
* Please refer to the License for details. You may not use this file except in compliance with the License.
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
* See LICENSE in the root of the software repository for the full text of the License.
*/


/* !
 * \file matmul.asc
 * \brief
 */

#include "data_utils.h"
#include "kernel_tiling/kernel_tiling.h"
#include "tiling/platform/platform_ascendc.h"
#include "tiling/tiling_api.h"
#include "acl/acl.h"
#include "kernel_operator.h"
#ifdef ENABLE_CUBE_ONLY
#define ASCENDC_CUBE_ONLY
#endif
#include "lib/matmul_intf.h"

constexpr uint32_t M = 128;
constexpr uint32_t N = 30720;
constexpr uint32_t K = 64;
constexpr bool isTransA = false;
constexpr bool isTransB = false;
constexpr bool isBias = false;

/**
 * @brief  Copy tiling data to TCubeTiling ptr from tiling gm addr.
 * @param  tiling: TCubeTiling ptr which needs to copy tiling data.
 * @param  tilingGM: tiling gm addr.
 * @retval None
 */
__aicore__ inline void CopyTiling(TCubeTiling* tiling, GM_ADDR tilingGM)
{
    uint32_t* ptr = reinterpret_cast<uint32_t*>(tiling);
    auto tiling32 = reinterpret_cast<__gm__ uint32_t*>(tilingGM);

    for (uint32_t i = 0; i < sizeof(TCubeTiling) / sizeof(uint32_t); i++, ptr++) { *ptr = *(tiling32 + i); }
    return;
}

__aicore__ inline constexpr MatmulConfig GetCustomNormCFG()
{
    auto mmCfg = CFG_NORM;
    // disable unitflag for performance comparison
    mmCfg.enUnitFlag = false;
    return mmCfg;
}

__aicore__ inline constexpr MatmulConfig GetCustomMDLCFG()
{
    auto mmCfg = CFG_MDL;
#ifdef ENABLE_MDL_UNITFLAG
    mmCfg.enUnitFlag = true;
#endif
    return mmCfg;
}

template <typename AType, typename BType, typename CType, typename BiasType>
class MatmulKernel {
public:
    __aicore__ inline MatmulKernel(){};
    /**
     * @brief  Initialization before process.
     * @param  a: A matrix gm addr.
     * @param  b: B matrix gm addr.
     * @param  bias: Bias matrix gm addr.
     * @param  c: C matrix gm addr.
     * @param  tiling: Matmul tiling struct.
     * @retval None
     */
    __aicore__ inline void Init(GM_ADDR a, GM_ADDR b, GM_ADDR bias, GM_ADDR c, const TCubeTiling& tiling);
    /**
     * @brief  Process matrix calculation.
     * @param  pipe: TPipe object.
     * @retval None
     */
    __aicore__ inline void Process(AscendC::TPipe* pipe);

    using A_TYPE = AscendC::MatmulType<AscendC::TPosition::GM, CubeFormat::ND, AType>;
    using B_TYPE = AscendC::MatmulType<AscendC::TPosition::GM, CubeFormat::ND, BType>;
    using C_TYPE = AscendC::MatmulType<AscendC::TPosition::GM, CubeFormat::ND, CType>;
    using BIAS_TYPE = AscendC::MatmulType<AscendC::TPosition::GM, CubeFormat::ND, BiasType>;
#ifdef ENABLE_MDL
    constexpr static MatmulConfig CUSTOM_CFG_MDL = GetCustomMDLCFG();
    AscendC::Matmul<A_TYPE, B_TYPE, C_TYPE, BIAS_TYPE, CUSTOM_CFG_MDL> matmulObj;
#else
    constexpr static MatmulConfig CUSTOM_CFG_NORM = GetCustomNormCFG();
    AscendC::Matmul<A_TYPE, B_TYPE, C_TYPE, BIAS_TYPE, CUSTOM_CFG_NORM> matmulObj;
#endif

private:
    /**
     * @brief  Calculate the gm offset based on the blockIdx.
     * @param  offsetA: Gm offset of A matrix.
     * @param  offsetB: Gm offset of B matrix.
     * @param  offsetC: Gm offset of C matrix.
     * @param  offsetBias: Gm offset of Bias matrix.
     * @retval None
     */
    __aicore__ inline void CalcOffset(int32_t& offsetA, int32_t& offsetB, int32_t& offsetC, int32_t& offsetBias);

    AscendC::GlobalTensor<AType> aGlobal;
    AscendC::GlobalTensor<BType> bGlobal;
    AscendC::GlobalTensor<CType> cGlobal;
    AscendC::GlobalTensor<BiasType> biasGlobal;
    TCubeTiling tiling;
    int32_t mCoreIndex;
    int32_t nCoreIndex;
};

template <typename AType, typename BType, typename CType, typename BiasType>
__aicore__ inline void MatmulKernel<AType, BType, CType, BiasType>::Init(GM_ADDR a, GM_ADDR b, GM_ADDR bias, GM_ADDR c,
                                                                         const TCubeTiling& tiling)
{
    this->tiling = tiling;
    if (AscendC::GetBlockIdx() >= tiling.usedCoreNum) {
        return;
    }
    aGlobal.SetGlobalBuffer(reinterpret_cast<__gm__ AType*>(a), tiling.M * tiling.Ka);
    bGlobal.SetGlobalBuffer(reinterpret_cast<__gm__ BType*>(b), tiling.Kb * tiling.N);
    cGlobal.SetGlobalBuffer(reinterpret_cast<__gm__ CType*>(c), tiling.M * tiling.N);
    biasGlobal.SetGlobalBuffer(reinterpret_cast<__gm__ BiasType*>(bias), tiling.N);

    int32_t offsetA = 0;
    int32_t offsetB = 0;
    int32_t offsetC = 0;
    int32_t offsetBias = 0;
    CalcOffset(offsetA, offsetB, offsetC, offsetBias);
    aGlobal = aGlobal[offsetA];
    bGlobal = bGlobal[offsetB];
    cGlobal = cGlobal[offsetC];
    biasGlobal = biasGlobal[offsetBias];
}

template <typename AType, typename BType, typename CType, typename BiasType>
__aicore__ inline void MatmulKernel<AType, BType, CType, BiasType>::Process(AscendC::TPipe* pipe)
{
    if (AscendC::GetBlockIdx() >= tiling.usedCoreNum) {
        return;
    }
    // process with tail block
    int tailM = tiling.M - mCoreIndex * tiling.singleCoreM;
    tailM = tailM < tiling.singleCoreM ? (tailM > 0 ? tailM : tiling.singleCoreM) : tiling.singleCoreM;
    int tailN = tiling.N - nCoreIndex * tiling.singleCoreN;
    tailN = tailN < tiling.singleCoreN ? (tailN > 0 ? tailN : tiling.singleCoreN) : tiling.singleCoreN;
    matmulObj.SetSingleShape(tailM, tailN, tiling.Ka);
    matmulObj.SetTensorA(aGlobal, isTransA);
    matmulObj.SetTensorB(bGlobal, isTransB);
    if (tiling.isBias) {
        matmulObj.SetBias(biasGlobal);
    }
    matmulObj.IterateAll(cGlobal);
    matmulObj.End();
}

template <typename AType, typename BType, typename CType, typename BiasType>
__aicore__ inline void MatmulKernel<AType, BType, CType, BiasType>::CalcOffset(int32_t& offsetA, int32_t& offsetB,
                                                                               int32_t& offsetC, int32_t& offsetBias)
{
    const TCubeTiling& tiling = this->tiling;

    int32_t blockIdx = AscendC::GetBlockIdx();
    if (blockIdx >= tiling.usedCoreNum) {
        return;
    }
    auto mSingleBlocks = (tiling.M + tiling.singleCoreM - 1) / tiling.singleCoreM; // split M into mSingleBlocks cores
    mCoreIndex = blockIdx % mSingleBlocks;
    nCoreIndex = blockIdx / mSingleBlocks;

    if (isTransA) {
        offsetA = mCoreIndex * tiling.singleCoreM;
    } else {
        offsetA = mCoreIndex * tiling.Ka * tiling.singleCoreM;
    }
    if (isTransB) {
        offsetB = nCoreIndex * tiling.Kb * tiling.singleCoreN;
    } else {
        offsetB = nCoreIndex * tiling.singleCoreN;
    }
    offsetC = mCoreIndex * tiling.N * tiling.singleCoreM + nCoreIndex * tiling.singleCoreN;
    offsetBias = nCoreIndex * tiling.singleCoreN;
}

/**
 * @brief  matmul kernel function entry
 * @param  a: A matrix gm addr.
 * @param  b: B matrix gm addr.
 * @param  bias: bias matrix gm addr.
 * @param  c: C matrix gm addr.
 * @param  workspace: Temporary gm space addr required by matmul calc.
 * @param  tilingGm: Tiling data addr.
 * @retval None
 */
__global__ __aicore__ void matmul_custom(GM_ADDR a, GM_ADDR b, GM_ADDR bias, GM_ADDR c,
                                         __kfc_workspace__ GM_ADDR workspace, GM_ADDR tilingGm)
{
#ifdef ENABLE_CUBE_ONLY
    KERNEL_TASK_TYPE_DEFAULT(KERNEL_TYPE_AIC_ONLY);
#endif
    TCubeTiling tiling;
    CopyTiling(&tiling, tilingGm);

    MatmulKernel<half, half, float, float> matmulKernel;
    AscendC::TPipe pipe;
    matmulKernel.Init(a, b, bias, c, tiling);
    REGIST_MATMUL_OBJ(&pipe, GetSysWorkSpacePtr(), matmulKernel.matmulObj, &tiling);
    matmulKernel.Process(&pipe);
}

void GenerateTiling(platform_ascendc::PlatformAscendC* ascendcPlatform, uint8_t* tilingBuf)
{
    optiling::TCubeTiling tilingData;
    matmul_tiling::MultiCoreMatmulTiling tilingApi(*ascendcPlatform);

#ifdef ENABLE_CUBE_ONLY
    tilingApi.SetDim(ascendcPlatform->GetCoreNumAic());
#else
    tilingApi.SetDim(ascendcPlatform->GetCoreNumAiv());
#endif
    tilingApi.SetAType(matmul_tiling::TPosition::GM, matmul_tiling::CubeFormat::ND, matmul_tiling::DataType::DT_FLOAT16,
                       isTransA);
    tilingApi.SetBType(matmul_tiling::TPosition::GM, matmul_tiling::CubeFormat::ND, matmul_tiling::DataType::DT_FLOAT16,
                       isTransB);
    tilingApi.SetCType(matmul_tiling::TPosition::GM, matmul_tiling::CubeFormat::ND, matmul_tiling::DataType::DT_FLOAT);
    tilingApi.SetBiasType(matmul_tiling::TPosition::GM, matmul_tiling::CubeFormat::ND,
                          matmul_tiling::DataType::DT_FLOAT);

    tilingApi.SetOrgShape(M, N, K);
    tilingApi.SetShape(M, N, K);
    tilingApi.EnableBias(isBias);
    tilingApi.SetBufferSpace(-1, -1, -1);
    int64_t res = tilingApi.GetTiling(tilingData); // Get matmul tiling data.
    if (res == -1) {
        std::cout << "gen tiling failed" << std::endl;
    }
    uint32_t tcubeTilingSize = tilingData.GetDataSize();
    tilingData.SaveToBuffer(tilingBuf, tcubeTilingSize);
}

int32_t main(int32_t argc, char* argv[])
{
    auto ascendcPlatform = platform_ascendc::PlatformAscendCManager::GetInstance();

    size_t aFileSize = static_cast<size_t>(M * K) * sizeof(uint16_t); // uint16_t represent half
    size_t bFileSize = static_cast<size_t>(K * N) * sizeof(uint16_t); // uint16_t represent half
    size_t cFileSize = static_cast<size_t>(M * N) * sizeof(float);
    size_t biasFileSize = static_cast<size_t>(1 * N) * sizeof(float);

    size_t userWorkspaceSize = 0;
    size_t systemWorkspaceSize = static_cast<size_t>(ascendcPlatform->GetLibApiWorkSpaceSize());
    size_t workspaceSize = userWorkspaceSize + systemWorkspaceSize;

    // matmul TCubeTiling
    size_t tilingFileSize = sizeof(TCubeTiling);
    uint8_t* tilingBuf = (uint8_t*)malloc(tilingFileSize);
    GenerateTiling(ascendcPlatform, tilingBuf);

    uint32_t numBlocks = reinterpret_cast<TCubeTiling*>(tilingBuf)->usedCoreNum;

    int32_t deviceId = 0;
    aclrtStream stream = nullptr;
    aclrtContext context;

    aclInit(nullptr);
    aclrtSetDevice(deviceId);
    aclrtCreateContext(&context, deviceId);
    aclrtCreateStream(&stream);

    uint8_t* aHost;
    uint8_t* aDevice;
    aclrtMallocHost((void**)(&aHost), aFileSize);
    aclrtMalloc((void**)&aDevice, aFileSize, ACL_MEM_MALLOC_HUGE_FIRST);
    ReadFile("./input/x1_gm.bin", aFileSize, aHost, aFileSize);
    aclrtMemcpy(aDevice, aFileSize, aHost, aFileSize, ACL_MEMCPY_HOST_TO_DEVICE);

    uint8_t* bHost;
    uint8_t* bDevice;
    aclrtMallocHost((void**)(&bHost), bFileSize);
    aclrtMalloc((void**)&bDevice, bFileSize, ACL_MEM_MALLOC_HUGE_FIRST);
    ReadFile("./input/x2_gm.bin", bFileSize, bHost, bFileSize);
    aclrtMemcpy(bDevice, bFileSize, bHost, bFileSize, ACL_MEMCPY_HOST_TO_DEVICE);

    uint8_t* biasHost = nullptr;
    uint8_t* biasDevice = nullptr;
    if (isBias) {
        aclrtMallocHost((void**)(&biasHost), biasFileSize);
        aclrtMalloc((void**)&biasDevice, biasFileSize, ACL_MEM_MALLOC_HUGE_FIRST);
        ReadFile("../input/bias_gm.bin", biasFileSize, biasHost, biasFileSize);
        aclrtMemcpy(biasDevice, biasFileSize, biasHost, biasFileSize, ACL_MEMCPY_HOST_TO_DEVICE);
    }

    uint8_t* cHost;
    uint8_t* cDevice;
    aclrtMallocHost((void**)(&cHost), cFileSize);
    aclrtMalloc((void**)&cDevice, cFileSize, ACL_MEM_MALLOC_HUGE_FIRST);

    uint8_t* workspaceDevice;
    aclrtMalloc((void**)&workspaceDevice, workspaceSize, ACL_MEM_MALLOC_HUGE_FIRST);

    uint8_t* tilingHost;
    uint8_t* tilingDevice;
    aclrtMallocHost((void**)(&tilingHost), tilingFileSize);
    aclrtMalloc((void**)&tilingDevice, tilingFileSize, ACL_MEM_MALLOC_HUGE_FIRST);
    aclrtMemcpy(tilingHost, tilingFileSize, tilingBuf, tilingFileSize, ACL_MEMCPY_HOST_TO_HOST);
    aclrtMemcpy(tilingDevice, tilingFileSize, tilingHost, tilingFileSize, ACL_MEMCPY_HOST_TO_DEVICE);

    matmul_custom<<<numBlocks, nullptr, stream>>>(aDevice, bDevice, biasDevice, cDevice, workspaceDevice, tilingDevice);
    aclrtSynchronizeStream(stream);

    aclrtMemcpy(cHost, cFileSize, cDevice, cFileSize, ACL_MEMCPY_DEVICE_TO_HOST);
    WriteFile("./output/output.bin", cHost, cFileSize);

    aclrtFree(aDevice);
    aclrtFreeHost(aHost);
    aclrtFree(bDevice);
    aclrtFreeHost(bHost);
    if (isBias) {
        aclrtFree(biasDevice);
        aclrtFreeHost(biasHost);
    }
    aclrtFree(workspaceDevice);
    aclrtFree(tilingDevice);
    aclrtFreeHost(tilingHost);
    aclrtFree(cDevice);
    aclrtFreeHost(cHost);

    aclrtDestroyStream(stream);
    aclrtResetDevice(deviceId);
    aclFinalize();

    free(tilingBuf);
    return 0;
}