forked from OSchip/llvm-project
381 lines
12 KiB
C
381 lines
12 KiB
C
/******************** GPUJIT.c - GPUJIT Execution Engine **********************/
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/* */
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/* The LLVM Compiler Infrastructure */
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/* */
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/* This file is dual licensed under the MIT and the University of Illinois */
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/* Open Source License. See LICENSE.TXT for details. */
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/* */
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/******************************************************************************/
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/* */
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/* This file implements GPUJIT, a ptx string execution engine for GPU. */
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/* */
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/******************************************************************************/
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#include "GPUJIT.h"
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#include <cuda.h>
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#include <cuda_runtime.h>
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#include <dlfcn.h>
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#include <stdarg.h>
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#include <stdio.h>
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static int DebugMode;
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static void debug_print(const char *format, ...) {
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if (!DebugMode)
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return;
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va_list args;
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va_start(args, format);
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vfprintf(stderr, format, args);
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va_end(args);
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}
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#define dump_function() debug_print("-> %s\n", __func__)
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/* Define Polly's GPGPU data types. */
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struct PollyGPUContextT {
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CUcontext Cuda;
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};
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struct PollyGPUModuleT {
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CUmodule Cuda;
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};
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struct PollyGPUFunctionT {
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CUfunction Cuda;
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};
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struct PollyGPUDeviceT {
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CUdevice Cuda;
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};
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struct PollyGPUDevicePtrT {
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CUdeviceptr Cuda;
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};
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/* Dynamic library handles for the CUDA and CUDA runtime library. */
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static void *HandleCuda;
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static void *HandleCudaRT;
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/* Type-defines of function pointer to CUDA driver APIs. */
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typedef CUresult CUDAAPI CuMemAllocFcnTy(CUdeviceptr *, size_t);
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static CuMemAllocFcnTy *CuMemAllocFcnPtr;
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typedef CUresult CUDAAPI CuFuncSetBlockShapeFcnTy(CUfunction, int, int, int);
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static CuFuncSetBlockShapeFcnTy *CuFuncSetBlockShapeFcnPtr;
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typedef CUresult CUDAAPI CuParamSetvFcnTy(CUfunction, int, void *,
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unsigned int);
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static CuParamSetvFcnTy *CuParamSetvFcnPtr;
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typedef CUresult CUDAAPI CuParamSetSizeFcnTy(CUfunction, unsigned int);
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static CuParamSetSizeFcnTy *CuParamSetSizeFcnPtr;
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typedef CUresult CUDAAPI CuLaunchGridFcnTy(CUfunction, int, int);
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static CuLaunchGridFcnTy *CuLaunchGridFcnPtr;
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typedef CUresult CUDAAPI CuMemcpyDtoHFcnTy(void *, CUdeviceptr, size_t);
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static CuMemcpyDtoHFcnTy *CuMemcpyDtoHFcnPtr;
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typedef CUresult CUDAAPI CuMemcpyHtoDFcnTy(CUdeviceptr, const void *, size_t);
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static CuMemcpyHtoDFcnTy *CuMemcpyHtoDFcnPtr;
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typedef CUresult CUDAAPI CuMemFreeFcnTy(CUdeviceptr);
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static CuMemFreeFcnTy *CuMemFreeFcnPtr;
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typedef CUresult CUDAAPI CuModuleUnloadFcnTy(CUmodule);
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static CuModuleUnloadFcnTy *CuModuleUnloadFcnPtr;
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typedef CUresult CUDAAPI CuCtxDestroyFcnTy(CUcontext);
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static CuCtxDestroyFcnTy *CuCtxDestroyFcnPtr;
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typedef CUresult CUDAAPI CuInitFcnTy(unsigned int);
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static CuInitFcnTy *CuInitFcnPtr;
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typedef CUresult CUDAAPI CuDeviceGetCountFcnTy(int *);
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static CuDeviceGetCountFcnTy *CuDeviceGetCountFcnPtr;
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typedef CUresult CUDAAPI CuCtxCreateFcnTy(CUcontext *, unsigned int, CUdevice);
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static CuCtxCreateFcnTy *CuCtxCreateFcnPtr;
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typedef CUresult CUDAAPI CuDeviceGetFcnTy(CUdevice *, int);
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static CuDeviceGetFcnTy *CuDeviceGetFcnPtr;
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typedef CUresult CUDAAPI CuModuleLoadDataExFcnTy(CUmodule *, const void *,
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unsigned int, CUjit_option *,
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void **);
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static CuModuleLoadDataExFcnTy *CuModuleLoadDataExFcnPtr;
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typedef CUresult CUDAAPI CuModuleGetFunctionFcnTy(CUfunction *, CUmodule,
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const char *);
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static CuModuleGetFunctionFcnTy *CuModuleGetFunctionFcnPtr;
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typedef CUresult CUDAAPI CuDeviceComputeCapabilityFcnTy(int *, int *, CUdevice);
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static CuDeviceComputeCapabilityFcnTy *CuDeviceComputeCapabilityFcnPtr;
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typedef CUresult CUDAAPI CuDeviceGetNameFcnTy(char *, int, CUdevice);
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static CuDeviceGetNameFcnTy *CuDeviceGetNameFcnPtr;
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/* Type-defines of function pointer ot CUDA runtime APIs. */
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typedef cudaError_t CUDARTAPI CudaThreadSynchronizeFcnTy(void);
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static CudaThreadSynchronizeFcnTy *CudaThreadSynchronizeFcnPtr;
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static void *getAPIHandle(void *Handle, const char *FuncName) {
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char *Err;
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void *FuncPtr;
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dlerror();
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FuncPtr = dlsym(Handle, FuncName);
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if ((Err = dlerror()) != 0) {
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fprintf(stdout, "Load CUDA driver API failed: %s. \n", Err);
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return 0;
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}
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return FuncPtr;
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}
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static int initialDeviceAPILibraries() {
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HandleCuda = dlopen("libcuda.so", RTLD_LAZY);
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if (!HandleCuda) {
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printf("Cannot open library: %s. \n", dlerror());
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return 0;
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}
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HandleCudaRT = dlopen("libcudart.so", RTLD_LAZY);
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if (!HandleCudaRT) {
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printf("Cannot open library: %s. \n", dlerror());
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return 0;
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}
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return 1;
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}
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static int initialDeviceAPIs() {
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if (initialDeviceAPILibraries() == 0)
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return 0;
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/* Get function pointer to CUDA Driver APIs.
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*
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* Note that compilers conforming to the ISO C standard are required to
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* generate a warning if a conversion from a void * pointer to a function
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* pointer is attempted as in the following statements. The warning
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* of this kind of cast may not be emitted by clang and new versions of gcc
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* as it is valid on POSIX 2008.
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*/
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CuFuncSetBlockShapeFcnPtr = (CuFuncSetBlockShapeFcnTy *)getAPIHandle(
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HandleCuda, "cuFuncSetBlockShape");
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CuParamSetvFcnPtr =
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(CuParamSetvFcnTy *)getAPIHandle(HandleCuda, "cuParamSetv");
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CuParamSetSizeFcnPtr =
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(CuParamSetSizeFcnTy *)getAPIHandle(HandleCuda, "cuParamSetSize");
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CuLaunchGridFcnPtr =
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(CuLaunchGridFcnTy *)getAPIHandle(HandleCuda, "cuLaunchGrid");
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CuMemAllocFcnPtr =
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(CuMemAllocFcnTy *)getAPIHandle(HandleCuda, "cuMemAlloc_v2");
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CuMemFreeFcnPtr = (CuMemFreeFcnTy *)getAPIHandle(HandleCuda, "cuMemFree_v2");
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CuMemcpyDtoHFcnPtr =
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(CuMemcpyDtoHFcnTy *)getAPIHandle(HandleCuda, "cuMemcpyDtoH_v2");
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CuMemcpyHtoDFcnPtr =
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(CuMemcpyHtoDFcnTy *)getAPIHandle(HandleCuda, "cuMemcpyHtoD_v2");
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CuModuleUnloadFcnPtr =
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(CuModuleUnloadFcnTy *)getAPIHandle(HandleCuda, "cuModuleUnload");
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CuCtxDestroyFcnPtr =
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(CuCtxDestroyFcnTy *)getAPIHandle(HandleCuda, "cuCtxDestroy");
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CuInitFcnPtr = (CuInitFcnTy *)getAPIHandle(HandleCuda, "cuInit");
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CuDeviceGetCountFcnPtr =
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(CuDeviceGetCountFcnTy *)getAPIHandle(HandleCuda, "cuDeviceGetCount");
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CuDeviceGetFcnPtr =
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(CuDeviceGetFcnTy *)getAPIHandle(HandleCuda, "cuDeviceGet");
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CuCtxCreateFcnPtr =
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(CuCtxCreateFcnTy *)getAPIHandle(HandleCuda, "cuCtxCreate_v2");
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CuModuleLoadDataExFcnPtr =
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(CuModuleLoadDataExFcnTy *)getAPIHandle(HandleCuda, "cuModuleLoadDataEx");
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CuModuleGetFunctionFcnPtr = (CuModuleGetFunctionFcnTy *)getAPIHandle(
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HandleCuda, "cuModuleGetFunction");
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CuDeviceComputeCapabilityFcnPtr =
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(CuDeviceComputeCapabilityFcnTy *)getAPIHandle(
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HandleCuda, "cuDeviceComputeCapability");
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CuDeviceGetNameFcnPtr =
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(CuDeviceGetNameFcnTy *)getAPIHandle(HandleCuda, "cuDeviceGetName");
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/* Get function pointer to CUDA Runtime APIs. */
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CudaThreadSynchronizeFcnPtr = (CudaThreadSynchronizeFcnTy *)getAPIHandle(
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HandleCudaRT, "cudaThreadSynchronize");
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return 1;
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}
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void polly_initDevice(PollyGPUContext **Context, PollyGPUDevice **Device) {
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DebugMode = getenv("POLLY_DEBUG") != 0;
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dump_function();
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int Major = 0, Minor = 0, DeviceID = 0;
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char DeviceName[256];
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int DeviceCount = 0;
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/* Get API handles. */
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if (initialDeviceAPIs() == 0) {
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fprintf(stdout, "Getting the \"handle\" for the CUDA driver API failed.\n");
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exit(-1);
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}
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if (CuInitFcnPtr(0) != CUDA_SUCCESS) {
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fprintf(stdout, "Initializing the CUDA driver API failed.\n");
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exit(-1);
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}
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/* Get number of devices that supports CUDA. */
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CuDeviceGetCountFcnPtr(&DeviceCount);
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if (DeviceCount == 0) {
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fprintf(stdout, "There is no device supporting CUDA.\n");
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exit(-1);
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}
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/* We select the 1st device as default. */
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*Device = malloc(sizeof(PollyGPUDevice));
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if (*Device == 0) {
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fprintf(stdout, "Allocate memory for Polly GPU device failed.\n");
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exit(-1);
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}
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CuDeviceGetFcnPtr(&((*Device)->Cuda), 0);
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/* Get compute capabilities and the device name. */
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CuDeviceComputeCapabilityFcnPtr(&Major, &Minor, (*Device)->Cuda);
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CuDeviceGetNameFcnPtr(DeviceName, 256, (*Device)->Cuda);
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debug_print("> Running on GPU device %d : %s.\n", DeviceID, DeviceName);
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/* Create context on the device. */
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*Context = malloc(sizeof(PollyGPUContext));
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if (*Context == 0) {
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fprintf(stdout, "Allocate memory for Polly GPU context failed.\n");
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exit(-1);
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}
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CuCtxCreateFcnPtr(&((*Context)->Cuda), 0, (*Device)->Cuda);
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}
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void polly_getPTXModule(void *PTXBuffer, PollyGPUModule **Module) {
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dump_function();
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*Module = malloc(sizeof(PollyGPUModule));
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if (*Module == 0) {
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fprintf(stdout, "Allocate memory for Polly GPU module failed.\n");
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exit(-1);
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}
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if (CuModuleLoadDataExFcnPtr(&((*Module)->Cuda), PTXBuffer, 0, 0, 0) !=
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CUDA_SUCCESS) {
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fprintf(stdout, "Loading ptx assembly text failed.\n");
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exit(-1);
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}
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}
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void polly_getPTXKernelEntry(const char *KernelName, PollyGPUModule *Module,
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PollyGPUFunction **Kernel) {
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dump_function();
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*Kernel = malloc(sizeof(PollyGPUFunction));
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if (*Kernel == 0) {
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fprintf(stdout, "Allocate memory for Polly GPU kernel failed.\n");
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exit(-1);
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}
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/* Locate the kernel entry point. */
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if (CuModuleGetFunctionFcnPtr(&((*Kernel)->Cuda), Module->Cuda, KernelName) !=
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CUDA_SUCCESS) {
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fprintf(stdout, "Loading kernel function failed.\n");
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exit(-1);
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}
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}
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void polly_copyFromHostToDevice(PollyGPUDevicePtr *DevData, void *HostData,
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int MemSize) {
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dump_function();
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CUdeviceptr CuDevData = DevData->Cuda;
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CuMemcpyHtoDFcnPtr(CuDevData, HostData, MemSize);
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}
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void polly_copyFromDeviceToHost(void *HostData, PollyGPUDevicePtr *DevData,
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int MemSize) {
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dump_function();
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if (CuMemcpyDtoHFcnPtr(HostData, DevData->Cuda, MemSize) != CUDA_SUCCESS) {
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fprintf(stdout, "Copying results from device to host memory failed.\n");
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exit(-1);
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}
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}
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void polly_setKernelParameters(PollyGPUFunction *Kernel, int BlockWidth,
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int BlockHeight, PollyGPUDevicePtr *DevData) {
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dump_function();
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int ParamOffset = 0;
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CuFuncSetBlockShapeFcnPtr(Kernel->Cuda, BlockWidth, BlockHeight, 1);
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CuParamSetvFcnPtr(Kernel->Cuda, ParamOffset, &(DevData->Cuda),
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sizeof(DevData->Cuda));
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ParamOffset += sizeof(DevData->Cuda);
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CuParamSetSizeFcnPtr(Kernel->Cuda, ParamOffset);
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}
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void polly_launchKernel(PollyGPUFunction *Kernel, int GridWidth,
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int GridHeight) {
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dump_function();
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if (CuLaunchGridFcnPtr(Kernel->Cuda, GridWidth, GridHeight) != CUDA_SUCCESS) {
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fprintf(stdout, "Launching CUDA kernel failed.\n");
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exit(-1);
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}
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CudaThreadSynchronizeFcnPtr();
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debug_print("CUDA kernel launched.\n");
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}
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void polly_cleanupGPGPUResources(void *HostData, PollyGPUDevicePtr *DevData,
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PollyGPUModule *Module,
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PollyGPUContext *Context,
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PollyGPUFunction *Kernel) {
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dump_function();
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if (HostData) {
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free(HostData);
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HostData = 0;
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}
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if (DevData->Cuda) {
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CuMemFreeFcnPtr(DevData->Cuda);
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free(DevData);
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}
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if (Module->Cuda) {
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CuModuleUnloadFcnPtr(Module->Cuda);
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free(Module);
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}
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if (Context->Cuda) {
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CuCtxDestroyFcnPtr(Context->Cuda);
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free(Context);
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}
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if (Kernel) {
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free(Kernel);
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}
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dlclose(HandleCuda);
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dlclose(HandleCudaRT);
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}
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