Add primary contex management functions

These functions can be used to create HW cuda device using primary
contexts - which is the preferred approach.
Signed-off-by: Oleg Dobkin <olegd@anyvision.co>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

include/ffnvcodec/dynlink_cuda.h

@@ -332,6 +332,12 @@ typedef CUresult CUDAAPI tcuGetErrorName(CUresult error, const char** pstr);
 typedef CUresult CUDAAPI tcuGetErrorString(CUresult error, const char** pstr);
 typedef CUresult CUDAAPI tcuCtxGetDevice(CUdevice *device);
 
+typedef CUresult CUDAAPI tcuDevicePrimaryCtxRetain(CUcontext *pctx, CUdevice dev);
+typedef CUresult CUDAAPI tcuDevicePrimaryCtxRelease(CUdevice dev);
+typedef CUresult CUDAAPI tcuDevicePrimaryCtxSetFlags(CUdevice dev, unsigned int flags);
+typedef CUresult CUDAAPI tcuDevicePrimaryCtxGetState(CUdevice dev, unsigned int *flags, int *active);
+typedef CUresult CUDAAPI tcuDevicePrimaryCtxReset(CUdevice dev);
+
 typedef CUresult CUDAAPI tcuStreamCreate(CUstream *phStream, unsigned int flags);
 typedef CUresult CUDAAPI tcuStreamQuery(CUstream hStream);
 typedef CUresult CUDAAPI tcuStreamSynchronize(CUstream hStream);

include/ffnvcodec/dynlink_loader.h

@@ -158,6 +158,12 @@ typedef struct CudaFunctions {
     tcuGetErrorString *cuGetErrorString;
     tcuCtxGetDevice *cuCtxGetDevice;
 
+    tcuDevicePrimaryCtxRetain *cuDevicePrimaryCtxRetain;
+    tcuDevicePrimaryCtxRelease *cuDevicePrimaryCtxRelease;
+    tcuDevicePrimaryCtxSetFlags *cuDevicePrimaryCtxSetFlags;
+    tcuDevicePrimaryCtxGetState *cuDevicePrimaryCtxGetState;
+    tcuDevicePrimaryCtxReset *cuDevicePrimaryCtxReset;
+
     tcuStreamCreate *cuStreamCreate;
     tcuStreamQuery *cuStreamQuery;
     tcuStreamSynchronize *cuStreamSynchronize;
@@ -281,6 +287,12 @@ static inline int cuda_load_functions(CudaFunctions **functions, void *logctx)
     LOAD_SYMBOL(cuGetErrorString, tcuGetErrorString, "cuGetErrorString");
     LOAD_SYMBOL(cuCtxGetDevice, tcuCtxGetDevice, "cuCtxGetDevice");
 
+    LOAD_SYMBOL(cuDevicePrimaryCtxRetain, tcuDevicePrimaryCtxRetain, "cuDevicePrimaryCtxRetain");
+    LOAD_SYMBOL(cuDevicePrimaryCtxRelease, tcuDevicePrimaryCtxRelease, "cuDevicePrimaryCtxRelease");
+    LOAD_SYMBOL(cuDevicePrimaryCtxSetFlags, tcuDevicePrimaryCtxSetFlags, "cuDevicePrimaryCtxSetFlags");
+    LOAD_SYMBOL(cuDevicePrimaryCtxGetState, tcuDevicePrimaryCtxGetState, "cuDevicePrimaryCtxGetState");
+    LOAD_SYMBOL(cuDevicePrimaryCtxReset, tcuDevicePrimaryCtxReset, "cuDevicePrimaryCtxReset");
+
     LOAD_SYMBOL(cuStreamCreate, tcuStreamCreate, "cuStreamCreate");
     LOAD_SYMBOL(cuStreamQuery, tcuStreamQuery, "cuStreamQuery");
     LOAD_SYMBOL(cuStreamSynchronize, tcuStreamSynchronize, "cuStreamSynchronize");