[CK_BUILDER] Put global CK functions in an the CK namespace (#3232)

* Wrap ck host utitlies in CK namespace.

The CK and CK-Tile source code bases are incompatible because CK is not properly using namespaces everywhere. In particular, we need to put hip_check_error in the ck namespace.

Move all functions in include/ck_/host_utility that were in global namespace into the ck namespace.

There may be additional namespace problems like this, and it's possible we'll have namespace clashes. But it is good design to properly guard our to code bases (CK and CKTile) so that they can both coexist. Moreover, estabilishing this compatiblity is essential if we are going to allow the builder to instantiate  kernels from either template library.

* Add using declarations to test code.

After moving some of the untils into the ck namespace, most examples and a few tests had to be updated to recognize the new namespace declarations. We add using declarations to individual compute units for functions that were previously in the global namespace.

* Add using declarations to client examples.

library/include/ck/library/reference_tensor_operation/gpu/reference_gemm.hpp

@@ -8,6 +8,7 @@
 
 #include "ck/tensor_operation/gpu/element/unary_element_wise_operation.hpp"
 #include "ck/tensor_operation/gpu/device/device_base.hpp"
+#include "ck/host_utility/kernel_launch.hpp"
 
 namespace ck {
 
@@ -209,20 +210,20 @@ struct ReferenceGemm : public device::BaseOperator
                                                       ComputeTypeA,
                                                       ComputeTypeB>;
 
-                return launch_and_time_kernel(stream_config,
-                                              kernel,
-                                              grid_dim,
-                                              block_dim,
-                                              0,
-                                              arg.p_a_grid_,
-                                              arg.p_b_grid_,
-                                              arg.p_c_grid_,
-                                              arg.m_,
-                                              arg.n_,
-                                              arg.k_,
-                                              arg.a_element_op_,
-                                              arg.b_element_op_,
-                                              arg.c_element_op_);
+                return ck::launch_and_time_kernel(stream_config,
+                                                  kernel,
+                                                  grid_dim,
+                                                  block_dim,
+                                                  0,
+                                                  arg.p_a_grid_,
+                                                  arg.p_b_grid_,
+                                                  arg.p_c_grid_,
+                                                  arg.m_,
+                                                  arg.n_,
+                                                  arg.k_,
+                                                  arg.a_element_op_,
+                                                  arg.b_element_op_,
+                                                  arg.c_element_op_);
             };
 
             return launch_kernel();

library/src/utility/convolution_parameter.cpp

@@ -1,5 +1,5 @@
+// Copyright (C) Advanced Micro Devices, Inc., or its affiliates.
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
 
 #include "ck/host_utility/io.hpp"
 
@@ -215,6 +215,7 @@ ck::utils::conv::ConvParam parse_conv_param(int num_dim_spatial, int arg_idx, ch
 
 std::ostream& operator<<(std::ostream& os, const ck::utils::conv::ConvParam& p)
 {
+    using ck::operator<<;
     os << "ConvParam {" << "\nnum_dim_spatial: " << p.num_dim_spatial_ << "\nG: " << p.G_
        << "\nN: " << p.N_ << "\nK: " << p.K_ << "\nC: " << p.C_
        << "\nfilter_spatial_lengths: " << p.filter_spatial_lengths_

library/src/utility/device_memory.cpp

@@ -1,10 +1,12 @@
+// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
 
 #include "ck/host_utility/hip_check_error.hpp"
 
 #include "ck/library/utility/device_memory.hpp"
 
+namespace ck {
+
 DeviceMem::DeviceMem(std::size_t mem_size) : mMemSize(mem_size)
 {
     hip_check_error(hipMalloc(static_cast<void**>(&mpDeviceBuf), mMemSize));
@@ -74,3 +76,5 @@ DeviceMem::~DeviceMem()
         hip_check_error(hipFree(mpDeviceBuf));
     }
 }
+
+} // namespace ck

library/src/utility/host_tensor.cpp

@@ -1,10 +1,12 @@
+// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
 
 #include <cassert>
 
 #include "ck/library/utility/host_tensor.hpp"
 
+namespace ck {
+
 std::size_t HostTensorDescriptor::GetNumOfDimension() const { return mLens.size(); }
 
 std::size_t HostTensorDescriptor::GetElementSize() const
@@ -56,3 +58,5 @@ std::ostream& operator<<(std::ostream& os, HostTensorDescriptor::ChosenLayout ta
     }
     return os;
 }
+
+} // namespace ck