[SYCL][CUDA] Add cuda_dev_kit feature

These changes add a cuda_dev_kit feature check for detecting
availability of a CUDA SDK. CUDA include path and library path can be
controlled through the new CUDA_INCLUDE and CUDA_LIBS_DIR variables.

Signed-off-by: Larsen, Steffen <[email protected]>

Author: steffenlarsen

SYCL/Plugin/interop-cuda-experimental.cpp

@@ -1,6 +1,6 @@
-// REQUIRES: cuda
+// REQUIRES: cuda && cuda_dev_kit
 
-// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple -lcuda %s -o %t.out
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %cuda_options %s -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
 
 #define SYCL_EXT_ONEAPI_BACKEND_CUDA_EXPERIMENTAL 1

SYCL/README.md

@@ -123,6 +123,10 @@ at the full path specified by this variable.
 
 ***LEVEL_ZERO_LIBS_DIR*** - path to Level Zero libraries.
 
+***CUDA_INCLUDE*** - path to CUDA headers.
+
+***CUDA_LIBS_DIR*** - path to CUDA libraries.
+
 ***HIP_PLATFORM*** - platform selection for HIP targeted devices.
 Defaults to AMD if no value is given. Supported values are:
  - **AMD**    - for HIP to target AMD GPUs
@@ -163,6 +167,7 @@ unavailable.
  * **aot_tool** - Ahead-of-time compilation tools availability;
  * **ocloc**, **opencl-aot** - Specific AOT tool availability;
  * **level_zero_dev_kit** - Level_Zero headers and libraries availability;
+ * **cuda_dev_kit** - CUDA SDK headers and libraries availability;
  * **gpu-intel-dg1** - Intel GPU DG1 availability;
  * **gpu-intel-dg2** - Intel GPU DG2 availability;
  * **gpu-intel-pvc** - Intel GPU PVC availability;
@@ -204,6 +209,10 @@ configure specific single test execution in the command line:
    can be also set by CMake variable LEVEL_ZERO_INCLUDE.
  * **level_zero_libs_dir** - directory containing Level_Zero native libraries,
    can be also set by CMake variable LEVEL_ZERO_LIBS_DIR.
+ * **cuda_include** - directory containing CUDA SDK headers, can be also set by
+   CMake variable CUDA_INCLUDE.
+ * **cuda_libs_dir** - directory containing CUDA SDK libraries, can be also set
+   by CMake variable CUDA_LIBS_DIR.
 
 Example:
 

SYCL/lit.cfg.py

@@ -124,6 +124,7 @@
     cl_options=True
     config.available_features.add('cl_options')
 
+# Check for Level Zero SDK
 check_l0_file='l0_include.cpp'
 with open(check_l0_file, 'w') as fp:
     fp.write('#include<level_zero/ze_api.h>\n')
@@ -145,6 +146,29 @@
 else:
     config.substitutions.append( ('%level_zero_options', '') )
 
+# Check for CUDA SDK
+check_cuda_file='cuda_include.cpp'
+with open(check_cuda_file, 'w') as fp:
+    fp.write('#include <cuda.h>\n')
+    fp.write('int main() { CUresult r = cuInit(0); return r; }')
+
+config.cuda_libs_dir=lit_config.params.get("cuda_libs_dir", config.cuda_libs_dir)
+config.cuda_include=lit_config.params.get("cuda_include", (config.cuda_include if config.cuda_include else config.sycl_include))
+
+cuda_options=cuda_options = (' -L'+config.cuda_libs_dir if config.cuda_libs_dir else '')+' -lcuda '+' -I'+config.cuda_include
+if cl_options:
+    cuda_options = ' '+( config.cuda_libs_dir+'/cuda.lib ' if config.cuda_libs_dir else 'cuda.lib')+' /I'+config.cuda_include
+
+config.substitutions.append( ('%cuda_options', cuda_options) )
+
+sp = subprocess.getstatusoutput(config.dpcpp_compiler+' -fsycl  ' + check_cuda_file + cuda_options)
+if sp[0] == 0:
+    config.available_features.add('cuda_dev_kit')
+    config.substitutions.append( ('%cuda_options', cuda_options) )
+else:
+    config.substitutions.append( ('%cuda_options', '') )
+
+# Check for OpenCL ICD
 if config.opencl_libs_dir:
     if cl_options:
         config.substitutions.append( ('%opencl_lib',  ' '+config.opencl_libs_dir+'/OpenCL.lib') )

SYCL/lit.site.cfg.py.in

@@ -18,6 +18,8 @@ config.sycl_libs_dir =  os.path.join(config.dpcpp_root_dir, ('bin' if platform.s
 config.opencl_libs_dir = (os.path.dirname("@OpenCL_LIBRARY@") if "@OpenCL_LIBRARY@" else "")
 config.level_zero_libs_dir = "@LEVEL_ZERO_LIBS_DIR@"
 config.level_zero_include = "@LEVEL_ZERO_INCLUDE@"
+config.cuda_libs_dir = "@CUDA_LIBS_DIR@"
+config.cuda_include = "@CUDA_INCLUDE@"
 
 config.opencl_include_dir = os.path.join(config.sycl_include, 'sycl')
 config.target_devices = lit_config.params.get("target_devices", "@SYCL_TARGET_DEVICES@")