[RUNTIME] Enable OpenCL (#17)

Makefile

@@ -26,6 +26,7 @@ endif
 export LDFLAGS = -pthread -lm
 export CFLAGS =  -std=c++11 -Wall -O2\
 	 -Iinclude -Idmlc-core/include -IHalideIR/src  -fPIC
+export FRAMEWORKS=
 
 ifneq ($(ADD_CFLAGS), NONE)
 	CFLAGS += $(ADD_CFLAGS)
@@ -43,6 +44,20 @@ else
 	CFLAGS += -DTVM_CUDA_RUNTIME=0
 endif
 
+
+ifeq ($(USE_OPENCL), 1)
+	CFLAGS += -DTVM_OPENCL_RUNTIME=1
+	UNAME_S := $(shell uname -s)
+	ifeq ($(UNAME_S), Darwin)
+		FRAMEWORKS += -framework OpenCL
+	else
+		LDFLAGS += -lOpenCL
+	endif
+else
+	CFLAGS += -DTVM_OPENCL_RUNTIME=0
+endif
+
+
 include tests/cpp/unittest.mk
 
 test: $(TEST)
@@ -59,7 +74,7 @@ lib/libtvm.a: $(ALL_DEP)
 
 lib/libtvm.so: $(ALL_DEP)
 	@mkdir -p $(@D)
-	$(CXX) $(CFLAGS) -shared -o $@ $(filter %.o %.a, $^) $(LDFLAGS)
+	$(CXX) $(CFLAGS) $(FRAMEWORKS) -shared -o $@ $(filter %.o %.a, $^) $(LDFLAGS)
 
 $(LIB_HALIDE_IR): LIBHALIDEIR
 

include/tvm/c_runtime_api.h

@@ -150,6 +150,23 @@ typedef TVMArray* TVMArrayHandle;
  */
 TVM_DLL const char *TVMGetLastError(void);
 
+/*!
+ * \brief Initialize certain type of devices, this may
+ *  not be necessary for all device types. But is needed for OpenCL.
+ *
+ * \param dev_mask The device mask of device type to be initialized
+ * \param option_keys Additional option  keys to pass.
+ * \param option_vals Additional option values to pass
+ * \param num_options Number of options to be passed into it.
+ * \param out_code 1: success, 0: already initialized
+ * \return Whether the function is successful.
+ */
+TVM_DLL int TVMDeviceInit(int dev_mask,
+                          const char** option_keys,
+                          const char** option_vals,
+                          int num_options,
+                          int *out_code);
+
 /*!
  * \brief Whether the specified context is enabled.
  *

make/config.mk

@@ -37,6 +37,9 @@ ADD_CFLAGS =
 # whether use CUDA during compile
 USE_CUDA = 1
 
+# whether use OpenCL during compile
+USE_OPENCL = 0
+
 # add the path to CUDA library to link and compile flag
 # if you have already add them to environment variable, leave it as NONE
 # USE_CUDA_PATH = /usr/local/cuda

python/tvm/__init__.py

@@ -12,7 +12,7 @@
 from . import schedule
 
 from . import ndarray as nd
-from .ndarray import cpu, gpu, opencl
+from .ndarray import cpu, gpu, opencl, init_opencl
 
 from ._base import TVMError
 from .function import *

python/tvm/_ctypes/_runtime_api.py

@@ -7,7 +7,7 @@
 import numpy as np
 
 from .._base import _LIB
-from .._base import c_array
+from .._base import c_array, c_str
 from .._base import check_call
 
 
@@ -182,6 +182,30 @@ def sync(ctx):
     check_call(_LIB.TVMSynchronize(ctx, None))
 
 
+def init_opencl(**kwargs):
+    """Initialize the opencl with the options.
+
+    Parameters
+    ----------
+    kwargs : dict
+        The options
+    """
+    keys = []
+    vals = []
+    for k, v in kwargs.items():
+        keys.append(c_str(k))
+        vals.append(c_str(v))
+    dev_mask = ctypes.c_int(4)
+    out_code = ctypes.c_int()
+    check_call(_LIB.TVMDeviceInit(
+        dev_mask,
+        c_array(ctypes.c_char_p, keys),
+        c_array(ctypes.c_char_p, vals),
+        ctypes.c_int(len(keys)),
+        ctypes.byref(out_code)))
+    return out_code.value != 0
+
+
 class NDArrayBase(object):
     """A simple Device/CPU Array object in runtime."""
     __slots__ = ["handle"]

python/tvm/ndarray.py

@@ -9,6 +9,7 @@
 from ._ctypes._runtime_api import TVMContext, TVMDataType, NDArrayBase
 from ._ctypes._runtime_api import cpu, gpu, opencl, empty, sync
 from ._ctypes._runtime_api import _init_runtime_module
+from ._ctypes._runtime_api import init_opencl
 
 
 class NDArray(NDArrayBase):

python/tvm/schedule.py

@@ -24,7 +24,7 @@ def __getitem__(self, k):
             k = k.op
         if not isinstance(k, _tensor.Operation):
             raise ValueError("Expect schedule key to be Tensor or Operation")
-        if not k in self.stage_map:
+        if k not in self.stage_map:
             raise ValueError("Cannot find the operation %s in schedule" % (str(k)))
         return self.stage_map[k]
 

src/runtime/c_runtime_api.cc

@@ -64,6 +64,23 @@ inline size_t GetDataAlignment(TVMArray* arr) {
 
 using namespace tvm::runtime;
 
+int TVMDeviceInit(int dev_mask,
+                  const char** option_keys,
+                  const char** option_vals,
+                  int num_options,
+                  int* out_code) {
+  API_BEGIN();
+  *out_code = 1;
+  switch (dev_mask) {
+    case kOpenCL: {
+      *out_code = DeviceInit<kOpenCL>(option_keys, option_vals, num_options);
+      break;
+    }
+    default: break;
+  }
+  API_END();
+}
+
 int TVMContextEnabled(TVMContext ctx,
                       int* out_enabled) {
   API_BEGIN();

src/runtime/device_api.h

@@ -1,6 +1,6 @@
 /*!
  *  Copyright (c) 2016 by Contributors
- * \file device_api.hx
+ * \file device_api.h
  * \brief Device specific API
  */
 #ifndef TVM_RUNTIME_DEVICE_API_H_
@@ -11,6 +11,21 @@
 
 namespace tvm {
 namespace runtime {
+/*!
+ * \brief Initialize the device.
+ * \param option_keys Additional option  keys to pass.
+ * \param option_vals Additional option values to pass
+ * \param num_options Number of options to be passed into it.
+ * \return 0 if success, 1: if already initialized
+ * \tparam xpu The device mask.
+ */
+template<TVMDeviceMask xpu>
+inline bool DeviceInit(const char** option_keys,
+                       const char** option_vals,
+                       int num_options) {
+  return true;
+}
+
 /*!
  * \brief Whether ctx is enabled.
  * \param ctx The device context to perform operation.
@@ -93,7 +108,8 @@ inline void StreamSync(TVMContext ctx, TVMStreamHandle stream);
 }  // namespace runtime
 }  // namespace tvm
 
-#include "./device_api_gpu.h"
 #include "./device_api_cpu.h"
+#include "./device_api_gpu.h"
+#include "./device_api_opencl.h"
 
 #endif  // TVM_RUNTIME_DEVICE_API_H_

src/runtime/device_api_gpu.h

@@ -1,6 +1,6 @@
 /*!
  *  Copyright (c) 2016 by Contributors
- * \file ctxice_api_gpu.h
+ * \file device_api_gpu.h
  * \brief GPU specific API
  */
 #ifndef TVM_RUNTIME_DEVICE_API_GPU_H_
@@ -14,15 +14,6 @@
 
 namespace tvm {
 namespace runtime {
-/*!
- * \brief Check CUDA error.
- * \param msg Message to print if an error occured.
- */
-#define CHECK_CUDA_ERROR(msg)                                           \
-  {                                                                     \
-    cudaError_t e = cudaGetLastError();                                 \
-    CHECK_EQ(e, cudaSuccess) << (msg) << " CUDA: " << cudaGetErrorString(e); \
-  }
 
 /*!
  * \brief Protected CUDA call.