Implement GetWorkSpaceSize from BaseOperator. (#1564)

include/ck/tensor_operation/gpu/device/device_cgemm.hpp

 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
 
 #pragma once
 #include "device_base.hpp"
@@ -37,7 +37,7 @@ struct DeviceCGemm : public BaseOperator
                                          index_t KRaw,
                                          index_t StrideA,
                                          index_t StrideB,
-                                         index_t StrideC)     = 0;
+                                         index_t StrideC) const = 0;
 };
 
 template <typename AElementwiseOperation,

include/ck/tensor_operation/gpu/device/impl/device_cgemm_4gemm_xdl_cshuffle.hpp

@@ -598,10 +598,26 @@ struct DeviceCGemm_4Gemm_Xdl_CShuffle
                                  [[maybe_unused]] index_t K,
                                  [[maybe_unused]] index_t StrideA,
                                  [[maybe_unused]] index_t StrideB,
-                                 index_t StrideC) override
+                                 index_t StrideC) const override
     {
         return 2 * sizeof(CDataType) * GetCElementSpaceSize(M, N, StrideC);
     }
+
+    std::size_t GetWorkSpaceSize(const BaseArgument* base_arg) const override
+    {
+        const auto* parg = dynamic_cast<const Argument*>(base_arg);
+
+        if(!parg)
+        {
+            std::ostringstream err;
+            err << "Provided argument pointer is not of an Argument class!"
+                << " In " << __FILE__ << ":" << __LINE__ << ", in function: " << __func__;
+            throw std::runtime_error(err.str());
+        }
+
+        return GetWorkspaceSize(
+            parg->M, parg->N, parg->K, parg->StrideA, parg->StrideB, parg->StrideC);
+    }
 };
 
 } // namespace device