Configure CMake for CUDA and SSE simulations

This commit adds the initial infrastructure for building accelerated simulation components.

   - Adds the CUDA_ENABLE option and logic to find the CUDA toolkit.

   - Adds the CHANNEL_SSE option to enable SSE-specific code paths.

   - Sets required properties on the SIMU target to allow linking with CUDA-compiled objects.

   - Creates the initial oai_cuda.h header for the public API.

CMakeLists.txt

@@ -24,6 +24,21 @@ project (OpenAirInterface LANGUAGES C CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(OAI_VERSION 2.4.0)
 
+option(CUDA_ENABLE "Enable CUDA accelerated channel simulation" OFF)
+if(CUDA_ENABLE)
+    find_package(CUDA REQUIRED)
+    find_package(CUDAToolkit REQUIRED)
+    message(STATUS "CUDA explicitly enabled, building with GPU acceleration support.")
+
+    enable_language(CUDA)
+
+    if(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
+        set(CMAKE_CUDA_ARCHITECTURES 90)
+    endif()
+
+    add_compile_definitions(ENABLE_CUDA)
+endif()
+
 #########################################################
 # Base directories, compatible with legacy OAI building #
 #########################################################
@@ -1687,6 +1702,17 @@ set (SIMUSRC
 add_library(SIMU STATIC ${SIMUSRC} )
 target_include_directories(SIMU PUBLIC ${OPENAIR1_DIR}/SIMULATION/TOOLS ${OPENAIR1_DIR}/SIMULATION/RF)
 
+option(CHANNEL_SSE "Enable SSE optimizations for channel simulation" OFF)
+if(CHANNEL_SSE)
+    message(STATUS "SSE-optimized channel simulation enabled.")
+    target_compile_definitions(SIMU PRIVATE CHANNEL_SSE)
+endif()
+
+if(CUDA_FOUND)
+  set_property(TARGET SIMU PROPERTY CUDA_ARCHITECTURES ${CMAKE_CUDA_ARCHITECTURES})
+  set_property(TARGET SIMU PROPERTY LINKER_LANGUAGE CXX)
+endif()
+
 include_directories("${NFAPI_DIR}/nfapi/public_inc")
 include_directories("${NFAPI_DIR}/common/public_inc")
 include_directories("${NFAPI_DIR}/pnf/public_inc")
@@ -2084,10 +2110,19 @@ target_link_libraries(nr_srssim PRIVATE
   m pthread ITTI dl nr_ue_phy_meas physim_common
   )
 
+if(CUDA_ENABLE)
+  if (TARGET oai_cuda_lib)
+      target_link_libraries(nr_dlsim PRIVATE oai_cuda_lib)
+      target_link_libraries(nr_ulsim PRIVATE oai_cuda_lib)
+
+      target_compile_definitions(nr_dlsim PRIVATE ENABLE_CUDA)
+      target_compile_definitions(nr_ulsim PRIVATE ENABLE_CUDA)
+  endif()
+endif()
+
 # these simulators do not compile:
 # dlsim_tm7 pbchsim scansim mbmssim pdcchsim pucchsim prachsim syncsim
 foreach(myExe dlsim ulsim)
-
   add_executable(${myExe}
     ${OPENAIR1_DIR}/SIMULATION/LTE_PHY/${myExe}.c
     ${OPENAIR_DIR}/common/utils/lte/ue_power.c
@@ -2197,6 +2232,11 @@ add_subdirectory(openair3)
 add_subdirectory(radio)
 add_subdirectory(tests)
 
+if(TARGET oai_cuda_lib)
+    message(STATUS "CUDA library 'oai_cuda_lib' found, linking to targets...")
+    target_link_libraries(nr_dlsim PRIVATE oai_cuda_lib)
+    target_link_libraries(nr_ulsim PRIVATE oai_cuda_lib)
+endif()
 
 if(PACKAGING_LTE OR PACKAGING_NR OR PACKAGING_COMMON OR PACKAGING_USRP OR PACKAGING_PHYSIM)
   include("tools/packages/packages.cmake")

openair1/SIMULATION/CMakeLists.txt

@@ -1,3 +1,4 @@
 if(ENABLE_PHYSIM_TESTS)
   add_subdirectory(tests)
+  add_subdirectory(TOOLS)
 endif()

openair1/SIMULATION/TOOLS/CMakeLists.txt

@@ -0,0 +1,31 @@
+#/*
+# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+# * contributor license agreements.  See the NOTICE file distributed with
+# * this work for additional information regarding copyright ownership.
+# * The OpenAirInterface Software Alliance licenses this file to You under
+# * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+# *
+# * 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.
+# *-------------------------------------------------------------------------------
+# * For more information about the OpenAirInterface (OAI) Software Alliance:
+# *      contact@openairinterface.org
+# */
+
+if(CUDA_ENABLE)
+    add_library(oai_cuda_lib STATIC
+    )
+
+    target_link_libraries(oai_cuda_lib PUBLIC CUDA::toolkit)
+
+    target_include_directories(oai_cuda_lib PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}
+    )
+endif()

openair1/SIMULATION/TOOLS/oai_cuda.h

@@ -0,0 +1,49 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef __OAI_CUDA_H__
+#define __OAI_CUDA_H__
+
+#include <stdint.h>
+
+
+#ifdef __NVCC__
+#else
+    #include "PHY/TOOLS/tools_defs.h"
+#endif
+
+#ifdef __NVCC__
+    #include <curand_kernel.h>
+    // Kernels go here.
+#endif // __NVCC__
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    // Cuda function declarations will go here.
+    
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __OAI_CUDA_H__