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 // SPDX-License-Identifier: MIT
 // Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
  
 #pragma once
  
 #include <iostream>
 #include <string>
  
 #include "ck_tile/core.hpp"
 #include "ck_tile/ops/common.hpp"
 #include "ck_tile/host/concat.hpp"
 #include "ck_tile/host/kernel_launch.hpp"
 #include "ck_tile/host/stream_utils.hpp"
 #include "ck_tile/core/utility/env.hpp"
 #include "ck_tile/ops/gemm/kernel/universal_gemm_kernel.hpp"
 #include "ck_tile/core/utility/type_traits.hpp"
  
 namespace ck_tile {
  
 struct GemmHostArgs
 {
     CK_TILE_HOST GemmHostArgs() = default;
     CK_TILE_HOST GemmHostArgs(const void* a_ptr_,
                               const void* b_ptr_,
                               void* e_ptr_,
                               index_t k_batch_,
                               index_t M_,
                               index_t N_,
                               index_t K_,
                               index_t stride_A_,
                               index_t stride_B_,
                               index_t stride_E_)
         : a_ptr(a_ptr_),
           b_ptr(b_ptr_),
           e_ptr(e_ptr_),
           M(M_),
           N(N_),
           K(K_),
           stride_A(stride_A_),
           stride_B(stride_B_),
           stride_E(stride_E_),
           k_batch(k_batch_)
     {
     }
  
     const void* a_ptr;
     const void* b_ptr;
     union
     {
         void* e_ptr;
         void* c_ptr;
     };
  
     index_t M;
     index_t N;
     index_t K;
     index_t stride_A;
     index_t stride_B;
  
     union
     {
         index_t stride_E;
         index_t stride_C;
     };
  
     index_t k_batch;
 };
  
 template <typename TilePartitioner_, typename GemmPipeline_, typename EpiloguePipeline_>
 struct GemmKernel
 {
     using UniversalGemmKernel =
         UniversalGemmKernel<TilePartitioner_, GemmPipeline_, EpiloguePipeline_>;
  
     using TilePartitioner  = remove_cvref_t<TilePartitioner_>;
     using GemmPipeline     = remove_cvref_t<GemmPipeline_>;
     using EpiloguePipeline = remove_cvref_t<EpiloguePipeline_>;
  
     using ALayout = remove_cvref_t<typename GemmPipeline::ALayout>;
     using BLayout = remove_cvref_t<typename GemmPipeline::BLayout>;
     using ELayout = remove_cvref_t<typename GemmPipeline::CLayout>;
  
     using ADataType = remove_cvref_t<typename GemmPipeline::ADataType>;
     using BDataType = remove_cvref_t<typename GemmPipeline::BDataType>;
     using EDataType = remove_cvref_t<typename EpiloguePipeline::ODataType>;
  
     static_assert(
         !is_detected<is_tuple, ALayout>::value && !is_detected<is_tuple, ADataType>::value,
         "ALayout and ADataType must be scalars. Multiple parameters are not currently supported.");
  
     static_assert(
         !is_detected<is_tuple, BLayout>::value && !is_detected<is_tuple, BDataType>::value,
         "BLayout and BDataType must be scalars. Multiple parameters are not currently supported.");
  
     static_assert(!is_detected<is_tuple, ELayout>::value &&
                       !is_detected<is_tuple, EDataType>::value,
                   "C/ELayout and C/EDataType must be scalars.");
  
     static constexpr index_t NumATensor = 1;
     static constexpr index_t NumBTensor = 1;
     static constexpr index_t kBlockSize = UniversalGemmKernel::kBlockSize;
  
     CK_TILE_HOST static auto GetName() -> const std::string
     {
         return UniversalGemmKernel::GetName();
     }
  
     CK_TILE_HOST static constexpr auto GridSize(index_t M, index_t N, index_t KBatch) -> dim3
     {
         return UniversalGemmKernel::GridSize(M, N, KBatch);
     }
  
     CK_TILE_HOST static auto MaxOccupancyGridSize(const stream_config& s) -> dim3
     {
         return UniversalGemmKernel::MaxOccupancyGridSize(s);
     }
  
     CK_TILE_HOST static constexpr auto BlockSize() -> dim3
     {
         return UniversalGemmKernel::BlockSize();
     }
  
     CK_TILE_HOST static constexpr auto MakeKernelArgs(const GemmHostArgs& hostArgs) ->
         typename UniversalGemmKernel::KernelArgs
     {
         return UniversalGemmKernel::MakeKernelArgs(
             UniversalGemmHostArgs<NumATensor, NumBTensor /*NumDTensor = 0 */>(
                 {hostArgs.a_ptr},
                 {hostArgs.b_ptr},
                 {/*hostArgs.ds_ptr*/},
                 hostArgs.e_ptr,
                 hostArgs.k_batch,
                 hostArgs.M,
                 hostArgs.N,
                 hostArgs.K,
                 {hostArgs.stride_A},
                 {hostArgs.stride_B},
                 {/*hostArgs.stride_Ds*/},
                 hostArgs.stride_E));
     }
  
     CK_TILE_HOST static auto
     IsSupportedArgument(const typename UniversalGemmKernel::KernelArgs& kargs) -> bool
     {
         return UniversalGemmKernel::IsSupportedArgument(kargs);
     }
  
     CK_TILE_DEVICE auto operator()(typename UniversalGemmKernel::KernelArgs kargs) const -> void
     {
         UniversalGemmKernel{}.template operator()(kargs);
     }
 };
 } // namespace ck_tile