ocl: OpenCL SVM support

CMakeLists.txt

@@ -162,6 +162,7 @@ OCV_OPTION(WITH_XIMEA          "Include XIMEA cameras support"               OFF
 OCV_OPTION(WITH_XINE           "Include Xine support (GPL)"                  OFF  IF (UNIX AND NOT APPLE AND NOT ANDROID) )
 OCV_OPTION(WITH_CLP            "Include Clp support (EPL)"                   OFF)
 OCV_OPTION(WITH_OPENCL         "Include OpenCL Runtime support"              ON   IF (NOT IOS) )
+OCV_OPTION(WITH_OPENCL_SVM     "Include OpenCL Shared Virtual Memory support" OFF ) # experimental
 OCV_OPTION(WITH_OPENCLAMDFFT   "Include AMD OpenCL FFT library support"      ON   IF (NOT ANDROID AND NOT IOS) )
 OCV_OPTION(WITH_OPENCLAMDBLAS  "Include AMD OpenCL BLAS library support"     ON   IF (NOT ANDROID AND NOT IOS) )
 OCV_OPTION(WITH_DIRECTX        "Include DirectX support"                     ON   IF WIN32 )

cmake/OpenCVDetectOpenCL.cmake

@@ -26,6 +26,10 @@ if(OPENCL_FOUND)
 
   set(HAVE_OPENCL 1)
 
+  if(WITH_OPENCL_SVM)
+    set(HAVE_OPENCL_SVM 1)
+  endif()
+
   if(HAVE_OPENCL_STATIC)
     set(OPENCL_LIBRARIES "${OPENCL_LIBRARY}")
   else()

cmake/templates/cvconfig.h.in

@@ -122,6 +122,7 @@
 /* OpenCL Support */
 #cmakedefine HAVE_OPENCL
 #cmakedefine HAVE_OPENCL_STATIC
+#cmakedefine HAVE_OPENCL_SVM
 
 /* OpenEXR codec */
 #cmakedefine HAVE_OPENEXR

modules/core/include/opencv2/core/mat.hpp

@@ -415,7 +415,7 @@ public:
                       const size_t dstofs[], const size_t dststep[], bool sync) const;
 
     // default implementation returns DummyBufferPoolController
-    virtual BufferPoolController* getBufferPoolController() const;
+    virtual BufferPoolController* getBufferPoolController(const char* id = NULL) const;
 };
 
 
@@ -481,7 +481,7 @@ struct CV_EXPORTS UMatData
     int refcount;
     uchar* data;
     uchar* origdata;
-    size_t size, capacity;
+    size_t size;
 
     int flags;
     void* handle;

modules/core/include/opencv2/core/ocl.hpp

@@ -56,6 +56,8 @@ CV_EXPORTS_W bool haveAmdFft();
 CV_EXPORTS_W void setUseOpenCL(bool flag);
 CV_EXPORTS_W void finish();
 
+CV_EXPORTS bool haveSVM();
+
 class CV_EXPORTS Context;
 class CV_EXPORTS Device;
 class CV_EXPORTS Kernel;
@@ -248,7 +250,10 @@ public:
     void* ptr() const;
 
     friend void initializeContextFromHandle(Context& ctx, void* platform, void* context, void* device);
-protected:
+
+    bool useSVM() const;
+    void setUseSVM(bool enabled);
+
     struct Impl;
     Impl* p;
 };
@@ -666,8 +671,17 @@ protected:
 
 CV_EXPORTS MatAllocator* getOpenCLAllocator();
 
-CV_EXPORTS_W bool isPerformanceCheckBypassed();
+
-#define OCL_PERFORMANCE_CHECK(condition) (cv::ocl::isPerformanceCheckBypassed() || (condition))
+#ifdef __OPENCV_BUILD
+namespace internal {
+
+CV_EXPORTS bool isPerformanceCheckBypassed();
+#define OCL_PERFORMANCE_CHECK(condition) (cv::ocl::internal::isPerformanceCheckBypassed() || (condition))
+
+CV_EXPORTS bool isCLBuffer(UMat& u);
+
+} // namespace internal
+#endif
 
 //! @}
 

modules/core/include/opencv2/core/opencl/opencl_svm.hpp

@@ -0,0 +1,81 @@
+/* See LICENSE file in the root OpenCV directory */
+
+#ifndef __OPENCV_CORE_OPENCL_SVM_HPP__
+#define __OPENCV_CORE_OPENCL_SVM_HPP__
+
+//
+// Internal usage only (binary compatibility is not guaranteed)
+//
+#ifndef __OPENCV_BUILD
+#error Internal header file
+#endif
+
+#if defined(HAVE_OPENCL) && defined(HAVE_OPENCL_SVM)
+#include "runtime/opencl_core.hpp"
+#include "runtime/opencl_svm_20.hpp"
+#include "runtime/opencl_svm_hsa_extension.hpp"
+
+namespace cv { namespace ocl { namespace svm {
+
+struct SVMCapabilities
+{
+    enum Value
+    {
+        SVM_COARSE_GRAIN_BUFFER = (1 << 0),
+        SVM_FINE_GRAIN_BUFFER = (1 << 1),
+        SVM_FINE_GRAIN_SYSTEM = (1 << 2),
+        SVM_ATOMICS = (1 << 3),
+    };
+    int value_;
+
+    SVMCapabilities(int capabilities = 0) : value_(capabilities) { }
+    operator int() const { return value_; }
+
+    inline bool isNoSVMSupport() const { return value_ == 0; }
+    inline bool isSupportCoarseGrainBuffer() const { return (value_ & SVM_COARSE_GRAIN_BUFFER) != 0; }
+    inline bool isSupportFineGrainBuffer() const { return (value_ & SVM_FINE_GRAIN_BUFFER) != 0; }
+    inline bool isSupportFineGrainSystem() const { return (value_ & SVM_FINE_GRAIN_SYSTEM) != 0; }
+    inline bool isSupportAtomics() const { return (value_ & SVM_ATOMICS) != 0; }
+};
+
+CV_EXPORTS const SVMCapabilities getSVMCapabilitites(const ocl::Context& context);
+
+struct SVMFunctions
+{
+    clSVMAllocAMD_fn fn_clSVMAlloc;
+    clSVMFreeAMD_fn fn_clSVMFree;
+    clSetKernelArgSVMPointerAMD_fn fn_clSetKernelArgSVMPointer;
+    //clSetKernelExecInfoAMD_fn fn_clSetKernelExecInfo;
+    //clEnqueueSVMFreeAMD_fn fn_clEnqueueSVMFree;
+    clEnqueueSVMMemcpyAMD_fn fn_clEnqueueSVMMemcpy;
+    clEnqueueSVMMemFillAMD_fn fn_clEnqueueSVMMemFill;
+    clEnqueueSVMMapAMD_fn fn_clEnqueueSVMMap;
+    clEnqueueSVMUnmapAMD_fn fn_clEnqueueSVMUnmap;
+
+    inline SVMFunctions()
+        : fn_clSVMAlloc(NULL), fn_clSVMFree(NULL),
+          fn_clSetKernelArgSVMPointer(NULL), /*fn_clSetKernelExecInfo(NULL),*/
+          /*fn_clEnqueueSVMFree(NULL),*/ fn_clEnqueueSVMMemcpy(NULL), fn_clEnqueueSVMMemFill(NULL),
+          fn_clEnqueueSVMMap(NULL), fn_clEnqueueSVMUnmap(NULL)
+    {
+        // nothing
+    }
+
+    inline bool isValid() const
+    {
+        return fn_clSVMAlloc != NULL && fn_clSVMFree && fn_clSetKernelArgSVMPointer &&
+                /*fn_clSetKernelExecInfo && fn_clEnqueueSVMFree &&*/ fn_clEnqueueSVMMemcpy &&
+                fn_clEnqueueSVMMemFill && fn_clEnqueueSVMMap && fn_clEnqueueSVMUnmap;
+    }
+};
+
+// We should guarantee that SVMFunctions lifetime is not less than context's lifetime
+CV_EXPORTS const SVMFunctions* getSVMFunctions(const ocl::Context& context);
+
+CV_EXPORTS bool useSVM(UMatUsageFlags usageFlags);
+
+}}} //namespace cv::ocl::svm
+#endif
+
+#endif // __OPENCV_CORE_OPENCL_SVM_HPP__
+/* End of file. */

modules/core/include/opencv2/core/opencl/runtime/opencl_core.hpp

@@ -62,6 +62,18 @@
 #endif
 #endif
 
+#ifdef HAVE_OPENCL_SVM
+#define clSVMAlloc clSVMAlloc_
+#define clSVMFree clSVMFree_
+#define clSetKernelArgSVMPointer clSetKernelArgSVMPointer_
+#define clSetKernelExecInfo clSetKernelExecInfo_
+#define clEnqueueSVMFree clEnqueueSVMFree_
+#define clEnqueueSVMMemcpy clEnqueueSVMMemcpy_
+#define clEnqueueSVMMemFill clEnqueueSVMMemFill_
+#define clEnqueueSVMMap clEnqueueSVMMap_
+#define clEnqueueSVMUnmap clEnqueueSVMUnmap_
+#endif
+
 #include "autogenerated/opencl_core.hpp"
 
 #endif // HAVE_OPENCL_STATIC

modules/core/include/opencv2/core/opencl/runtime/opencl_svm_20.hpp

@@ -0,0 +1,52 @@
+/* See LICENSE file in the root OpenCV directory */
+
+#ifndef __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_2_0_HPP__
+#define __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_2_0_HPP__
+
+#if defined(HAVE_OPENCL_SVM)
+#include "opencl_core.hpp"
+
+#include "opencl_svm_definitions.hpp"
+
+#ifndef HAVE_OPENCL_STATIC
+
+#undef clSVMAlloc
+#define clSVMAlloc clSVMAlloc_pfn
+#undef clSVMFree
+#define clSVMFree clSVMFree_pfn
+#undef clSetKernelArgSVMPointer
+#define clSetKernelArgSVMPointer clSetKernelArgSVMPointer_pfn
+#undef clSetKernelExecInfo
+//#define clSetKernelExecInfo clSetKernelExecInfo_pfn
+#undef clEnqueueSVMFree
+//#define clEnqueueSVMFree clEnqueueSVMFree_pfn
+#undef clEnqueueSVMMemcpy
+#define clEnqueueSVMMemcpy clEnqueueSVMMemcpy_pfn
+#undef clEnqueueSVMMemFill
+#define clEnqueueSVMMemFill clEnqueueSVMMemFill_pfn
+#undef clEnqueueSVMMap
+#define clEnqueueSVMMap clEnqueueSVMMap_pfn
+#undef clEnqueueSVMUnmap
+#define clEnqueueSVMUnmap clEnqueueSVMUnmap_pfn
+
+extern CL_RUNTIME_EXPORT void* (CL_API_CALL *clSVMAlloc)(cl_context context, cl_svm_mem_flags flags, size_t size, unsigned int alignment);
+extern CL_RUNTIME_EXPORT void (CL_API_CALL *clSVMFree)(cl_context context, void* svm_pointer);
+extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clSetKernelArgSVMPointer)(cl_kernel kernel, cl_uint arg_index, const void* arg_value);
+//extern CL_RUNTIME_EXPORT void* (CL_API_CALL *clSetKernelExecInfo)(cl_kernel kernel, cl_kernel_exec_info param_name, size_t param_value_size, const void* param_value);
+//extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clEnqueueSVMFree)(cl_command_queue command_queue, cl_uint num_svm_pointers, void* svm_pointers[],
+//        void (CL_CALLBACK *pfn_free_func)(cl_command_queue queue, cl_uint num_svm_pointers, void* svm_pointers[], void* user_data), void* user_data,
+//        cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event);
+extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clEnqueueSVMMemcpy)(cl_command_queue command_queue, cl_bool blocking_copy, void* dst_ptr, const void* src_ptr, size_t size,
+        cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event);
+extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clEnqueueSVMMemFill)(cl_command_queue command_queue, void* svm_ptr, const void* pattern, size_t pattern_size, size_t size,
+        cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event);
+extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clEnqueueSVMMap)(cl_command_queue command_queue, cl_bool blocking_map, cl_map_flags map_flags, void* svm_ptr, size_t size,
+        cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event);
+extern CL_RUNTIME_EXPORT cl_int (CL_API_CALL *clEnqueueSVMUnmap)(cl_command_queue command_queue, void* svm_ptr,
+        cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event);
+
+#endif // HAVE_OPENCL_STATIC
+
+#endif // HAVE_OPENCL_SVM
+
+#endif // __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_2_0_HPP__

modules/core/include/opencv2/core/opencl/runtime/opencl_svm_definitions.hpp

@@ -0,0 +1,42 @@
+/* See LICENSE file in the root OpenCV directory */
+
+#ifndef __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_DEFINITIONS_HPP__
+#define __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_DEFINITIONS_HPP__
+
+#if defined(HAVE_OPENCL_SVM)
+#if defined(CL_VERSION_2_0)
+
+// OpenCL 2.0 contains SVM definitions
+
+#else
+
+typedef cl_bitfield cl_device_svm_capabilities;
+typedef cl_bitfield cl_svm_mem_flags;
+typedef cl_uint     cl_kernel_exec_info;
+
+//
+// TODO Add real values after OpenCL 2.0 release
+//
+
+#ifndef CL_DEVICE_SVM_CAPABILITIES
+#define CL_DEVICE_SVM_CAPABILITIES 0x1053
+
+#define CL_DEVICE_SVM_COARSE_GRAIN_BUFFER             (1 << 0)
+#define CL_DEVICE_SVM_FINE_GRAIN_BUFFER               (1 << 1)
+#define CL_DEVICE_SVM_FINE_GRAIN_SYSTEM               (1 << 2)
+#define CL_DEVICE_SVM_ATOMICS                         (1 << 3)
+#endif
+
+#ifndef CL_MEM_SVM_FINE_GRAIN_BUFFER
+#define CL_MEM_SVM_FINE_GRAIN_BUFFER (1 << 10)
+#endif
+
+#ifndef CL_MEM_SVM_ATOMICS
+#define CL_MEM_SVM_ATOMICS (1 << 11)
+#endif
+
+
+#endif // CL_VERSION_2_0
+#endif // HAVE_OPENCL_SVM
+
+#endif // __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_DEFINITIONS_HPP__

modules/core/include/opencv2/core/opencl/runtime/opencl_svm_hsa_extension.hpp

@@ -0,0 +1,166 @@
+/* See LICENSE file in the root OpenCV directory */
+
+#ifndef __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_HSA_EXTENSION_HPP__
+#define __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_HSA_EXTENSION_HPP__
+
+#if defined(HAVE_OPENCL_SVM)
+#include "opencl_core.hpp"
+
+#ifndef CL_DEVICE_SVM_CAPABILITIES_AMD
+//
+//  Part of the file is an extract from the cl_ext.h file from AMD APP SDK package.
+//  Below is the original copyright.
+//
+/*******************************************************************************
+ * Copyright (c) 2008-2013 The Khronos Group Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and/or associated documentation files (the
+ * "Materials"), to deal in the Materials without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Materials, and to
+ * permit persons to whom the Materials are furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ ******************************************************************************/
+
+/*******************************************
+ * Shared Virtual Memory (SVM) extension
+ *******************************************/
+typedef cl_bitfield                      cl_device_svm_capabilities_amd;
+typedef cl_bitfield                      cl_svm_mem_flags_amd;
+typedef cl_uint                          cl_kernel_exec_info_amd;
+
+/* cl_device_info */
+#define CL_DEVICE_SVM_CAPABILITIES_AMD                     0x1053
+#define CL_DEVICE_PREFERRED_PLATFORM_ATOMIC_ALIGNMENT_AMD  0x1054
+
+/* cl_device_svm_capabilities_amd */
+#define CL_DEVICE_SVM_COARSE_GRAIN_BUFFER_AMD             (1 << 0)
+#define CL_DEVICE_SVM_FINE_GRAIN_BUFFER_AMD               (1 << 1)
+#define CL_DEVICE_SVM_FINE_GRAIN_SYSTEM_AMD               (1 << 2)
+#define CL_DEVICE_SVM_ATOMICS_AMD                         (1 << 3)
+
+/* cl_svm_mem_flags_amd */
+#define CL_MEM_SVM_FINE_GRAIN_BUFFER_AMD                  (1 << 10)
+#define CL_MEM_SVM_ATOMICS_AMD                            (1 << 11)
+
+/* cl_mem_info */
+#define CL_MEM_USES_SVM_POINTER_AMD                       0x1109
+
+/* cl_kernel_exec_info_amd */
+#define CL_KERNEL_EXEC_INFO_SVM_PTRS_AMD                  0x11B6
+#define CL_KERNEL_EXEC_INFO_SVM_FINE_GRAIN_SYSTEM_AMD     0x11B7
+
+/* cl_command_type */
+#define CL_COMMAND_SVM_FREE_AMD                           0x1209
+#define CL_COMMAND_SVM_MEMCPY_AMD                         0x120A
+#define CL_COMMAND_SVM_MEMFILL_AMD                        0x120B
+#define CL_COMMAND_SVM_MAP_AMD                            0x120C
+#define CL_COMMAND_SVM_UNMAP_AMD                          0x120D
+
+typedef CL_API_ENTRY void*
+(CL_API_CALL * clSVMAllocAMD_fn)(
+    cl_context            /* context */,
+    cl_svm_mem_flags_amd  /* flags */,
+    size_t                /* size */,
+    unsigned int          /* alignment */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY void
+(CL_API_CALL * clSVMFreeAMD_fn)(
+    cl_context  /* context */,
+    void*       /* svm_pointer */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clEnqueueSVMFreeAMD_fn)(
+    cl_command_queue /* command_queue */,
+    cl_uint          /* num_svm_pointers */,
+    void**           /* svm_pointers */,
+    void (CL_CALLBACK *)( /*pfn_free_func*/
+        cl_command_queue /* queue */,
+        cl_uint          /* num_svm_pointers */,
+        void**           /* svm_pointers */,
+        void*            /* user_data */),
+    void*             /* user_data */,
+    cl_uint           /* num_events_in_wait_list */,
+    const cl_event*   /* event_wait_list */,
+    cl_event*         /* event */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clEnqueueSVMMemcpyAMD_fn)(
+    cl_command_queue /* command_queue */,
+    cl_bool          /* blocking_copy */,
+    void*            /* dst_ptr */,
+    const void*      /* src_ptr */,
+    size_t           /* size */,
+    cl_uint          /* num_events_in_wait_list */,
+    const cl_event*  /* event_wait_list */,
+    cl_event*        /* event */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clEnqueueSVMMemFillAMD_fn)(
+    cl_command_queue /* command_queue */,
+    void*            /* svm_ptr */,
+    const void*      /* pattern */,
+    size_t           /* pattern_size */,
+    size_t           /* size */,
+    cl_uint          /* num_events_in_wait_list */,
+    const cl_event*  /* event_wait_list */,
+    cl_event*        /* event */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clEnqueueSVMMapAMD_fn)(
+    cl_command_queue /* command_queue */,
+    cl_bool          /* blocking_map */,
+    cl_map_flags     /* map_flags */,
+    void*            /* svm_ptr */,
+    size_t           /* size */,
+    cl_uint          /* num_events_in_wait_list */,
+    const cl_event*  /* event_wait_list */,
+    cl_event*        /* event */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clEnqueueSVMUnmapAMD_fn)(
+    cl_command_queue /* command_queue */,
+    void*            /* svm_ptr */,
+    cl_uint          /* num_events_in_wait_list */,
+    const cl_event*  /* event_wait_list */,
+    cl_event*        /* event */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clSetKernelArgSVMPointerAMD_fn)(
+    cl_kernel     /* kernel */,
+    cl_uint       /* arg_index */,
+    const void *  /* arg_value */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+typedef CL_API_ENTRY cl_int
+(CL_API_CALL * clSetKernelExecInfoAMD_fn)(
+     cl_kernel                /* kernel */,
+     cl_kernel_exec_info_amd  /* param_name */,
+     size_t                   /* param_value_size */,
+     const void *             /* param_value */
+) CL_EXT_SUFFIX__VERSION_1_2;
+
+#endif
+
+#endif // HAVE_OPENCL_SVM
+
+#endif // __OPENCV_CORE_OCL_RUNTIME_OPENCL_SVM_HSA_EXTENSION_HPP__

modules/core/src/matmul.cpp

@@ -721,6 +721,16 @@ static bool ocl_gemm_amdblas( InputArray matA, InputArray matB, double alpha,
         return false;
 
     UMat A = matA.getUMat(), B = matB.getUMat(), D = matD.getUMat();
+    if (!ocl::internal::isCLBuffer(A) || !ocl::internal::isCLBuffer(B) || !ocl::internal::isCLBuffer(D))
+    {
+        return false;
+    }
+    if (haveC)
+    {
+        UMat C = matC.getUMat();
+        if (!ocl::internal::isCLBuffer(C))
+            return false;
+    }
     if (haveC)
         ctrans ? transpose(matC, D) : matC.copyTo(D);
     else

modules/core/src/matrix.cpp

@@ -159,8 +159,9 @@ void MatAllocator::copy(UMatData* usrc, UMatData* udst, int dims, const size_t s
         memcpy(ptrs[1], ptrs[0], planesz);
 }
 
-BufferPoolController* MatAllocator::getBufferPoolController() const
+BufferPoolController* MatAllocator::getBufferPoolController(const char* id) const
 {
+    (void)id;
     static DummyBufferPoolController dummy;
     return &dummy;
 }

modules/core/src/opencl/runtime/opencl_core.cpp

@@ -182,6 +182,65 @@ static void* opencl_check_fn(int ID);
 
 #define CUSTOM_FUNCTION_ID 1000
 
+#ifdef HAVE_OPENCL_SVM
+#include "opencv2/core/opencl/runtime/opencl_svm_20.hpp"
+#define SVM_FUNCTION_ID_START CUSTOM_FUNCTION_ID
+#define SVM_FUNCTION_ID_END CUSTOM_FUNCTION_ID + 100
+
+enum OPENCL_FN_SVM_ID
+{
+    OPENCL_FN_clSVMAlloc = SVM_FUNCTION_ID_START,
+    OPENCL_FN_clSVMFree,
+    OPENCL_FN_clSetKernelArgSVMPointer,
+    OPENCL_FN_clSetKernelExecInfo,
+    OPENCL_FN_clEnqueueSVMFree,
+    OPENCL_FN_clEnqueueSVMMemcpy,
+    OPENCL_FN_clEnqueueSVMMemFill,
+    OPENCL_FN_clEnqueueSVMMap,
+    OPENCL_FN_clEnqueueSVMUnmap,
+};
+
+void* (CL_API_CALL *clSVMAlloc)(cl_context context, cl_svm_mem_flags flags, size_t size, unsigned int alignment) =
+        opencl_fn4<OPENCL_FN_clSVMAlloc, void*, cl_context, cl_svm_mem_flags, size_t, unsigned int>::switch_fn;
+static const struct DynamicFnEntry _clSVMAlloc_definition = { "clSVMAlloc", (void**)&clSVMAlloc};
+void (CL_API_CALL *clSVMFree)(cl_context context, void* svm_pointer) =
+        opencl_fn2<OPENCL_FN_clSVMFree, void, cl_context, void*>::switch_fn;
+static const struct DynamicFnEntry _clSVMFree_definition = { "clSVMFree", (void**)&clSVMFree};
+cl_int (CL_API_CALL *clSetKernelArgSVMPointer)(cl_kernel kernel, cl_uint arg_index, const void* arg_value) =
+        opencl_fn3<OPENCL_FN_clSetKernelArgSVMPointer, cl_int, cl_kernel, cl_uint, const void*>::switch_fn;
+static const struct DynamicFnEntry _clSetKernelArgSVMPointer_definition = { "clSetKernelArgSVMPointer", (void**)&clSetKernelArgSVMPointer};
+//void* (CL_API_CALL *clSetKernelExecInfo)(cl_kernel kernel, cl_kernel_exec_info param_name, size_t param_value_size, const void* param_value) =
+//        opencl_fn4<OPENCL_FN_clSetKernelExecInfo, void*, cl_kernel, cl_kernel_exec_info, size_t, const void*>::switch_fn;
+//static const struct DynamicFnEntry _clSetKernelExecInfo_definition = { "clSetKernelExecInfo", (void**)&clSetKernelExecInfo};
+//cl_int (CL_API_CALL *clEnqueueSVMFree)(...) =
+//        opencl_fn8<OPENCL_FN_clEnqueueSVMFree, cl_int, ...>::switch_fn;
+//static const struct DynamicFnEntry _clEnqueueSVMFree_definition = { "clEnqueueSVMFree", (void**)&clEnqueueSVMFree};
+cl_int (CL_API_CALL *clEnqueueSVMMemcpy)(cl_command_queue command_queue, cl_bool blocking_copy, void* dst_ptr, const void* src_ptr, size_t size, cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event) =
+        opencl_fn8<OPENCL_FN_clEnqueueSVMMemcpy, cl_int, cl_command_queue, cl_bool, void*, const void*, size_t, cl_uint, const cl_event*, cl_event*>::switch_fn;
+static const struct DynamicFnEntry _clEnqueueSVMMemcpy_definition = { "clEnqueueSVMMemcpy", (void**)&clEnqueueSVMMemcpy};
+cl_int (CL_API_CALL *clEnqueueSVMMemFill)(cl_command_queue command_queue, void* svm_ptr, const void* pattern, size_t pattern_size, size_t size, cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event) =
+        opencl_fn8<OPENCL_FN_clEnqueueSVMMemFill, cl_int, cl_command_queue, void*, const void*, size_t, size_t, cl_uint, const cl_event*, cl_event*>::switch_fn;
+static const struct DynamicFnEntry _clEnqueueSVMMemFill_definition = { "clEnqueueSVMMemFill", (void**)&clEnqueueSVMMemFill};
+cl_int (CL_API_CALL *clEnqueueSVMMap)(cl_command_queue command_queue, cl_bool blocking_map, cl_map_flags map_flags, void* svm_ptr, size_t size, cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event) =
+        opencl_fn8<OPENCL_FN_clEnqueueSVMMap, cl_int, cl_command_queue, cl_bool, cl_map_flags, void*, size_t, cl_uint, const cl_event*, cl_event*>::switch_fn;
+static const struct DynamicFnEntry _clEnqueueSVMMap_definition = { "clEnqueueSVMMap", (void**)&clEnqueueSVMMap};
+cl_int (CL_API_CALL *clEnqueueSVMUnmap)(cl_command_queue command_queue, void* svm_ptr, cl_uint num_events_in_wait_list, const cl_event* event_wait_list, cl_event* event) =
+        opencl_fn5<OPENCL_FN_clEnqueueSVMUnmap, cl_int, cl_command_queue, void*, cl_uint, const cl_event*, cl_event*>::switch_fn;
+static const struct DynamicFnEntry _clEnqueueSVMUnmap_definition = { "clEnqueueSVMUnmap", (void**)&clEnqueueSVMUnmap};
+
+static const struct DynamicFnEntry* opencl_svm_fn_list[] = {
+    &_clSVMAlloc_definition,
+    &_clSVMFree_definition,
+    &_clSetKernelArgSVMPointer_definition,
+    NULL/*&_clSetKernelExecInfo_definition*/,
+    NULL/*&_clEnqueueSVMFree_definition*/,
+    &_clEnqueueSVMMemcpy_definition,
+    &_clEnqueueSVMMemFill_definition,
+    &_clEnqueueSVMMap_definition,
+    &_clEnqueueSVMUnmap_definition,
+};
+#endif // HAVE_OPENCL_SVM
+
 //
 // END OF CUSTOM FUNCTIONS HERE
 //
@@ -194,6 +253,14 @@ static void* opencl_check_fn(int ID)
         assert(ID >= 0 && ID < (int)(sizeof(opencl_fn_list)/sizeof(opencl_fn_list[0])));
         e = opencl_fn_list[ID];
     }
+#ifdef HAVE_OPENCL_SVM
+    else if (ID >= SVM_FUNCTION_ID_START && ID < SVM_FUNCTION_ID_END)
+    {
+        ID = ID - SVM_FUNCTION_ID_START;
+        assert(ID >= 0 && ID < (int)(sizeof(opencl_svm_fn_list)/sizeof(opencl_svm_fn_list[0])));
+        e = opencl_svm_fn_list[ID];
+    }
+#endif
     else
     {
         CV_ErrorNoReturn(cv::Error::StsBadArg, "Invalid function ID");

modules/core/src/umatrix.cpp

@@ -55,7 +55,7 @@ UMatData::UMatData(const MatAllocator* allocator)
     prevAllocator = currAllocator = allocator;
     urefcount = refcount = 0;
     data = origdata = 0;
-    size = 0; capacity = 0;
+    size = 0;
     flags = 0;
     handle = 0;
     userdata = 0;
@@ -67,7 +67,7 @@ UMatData::~UMatData()
     prevAllocator = currAllocator = 0;
     urefcount = refcount = 0;
     data = origdata = 0;
-    size = 0; capacity = 0;
+    size = 0;
     flags = 0;
     handle = 0;
     userdata = 0;
@@ -221,7 +221,7 @@ UMat Mat::getUMat(int accessFlags, UMatUsageFlags usageFlags) const
         temp_u = a->allocate(dims, size.p, type(), data, step.p, accessFlags, usageFlags);
         temp_u->refcount = 1;
     }
-    UMat::getStdAllocator()->allocate(temp_u, accessFlags, usageFlags);
+    UMat::getStdAllocator()->allocate(temp_u, accessFlags, usageFlags); // TODO result is not checked
     hdr.flags = flags;
     setSize(hdr, dims, size.p, step.p);
     finalizeHdr(hdr);
@@ -575,7 +575,7 @@ Mat UMat::getMat(int accessFlags) const
 {
     if(!u)
         return Mat();
-    u->currAllocator->map(u, accessFlags | ACCESS_READ);
+    u->currAllocator->map(u, accessFlags | ACCESS_READ); // TODO Support ACCESS_WRITE without unnecessary data transfers
     CV_Assert(u->data != 0);
     Mat hdr(dims, size.p, type(), u->data + offset, step.p);
     hdr.flags = flags;