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165 lines
3.5 KiB
C++
165 lines
3.5 KiB
C++
// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#include <nvcore/Debug.h>
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#include <nvcore/Library.h>
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#include "CudaUtils.h"
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#if defined HAVE_CUDA
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#include <cuda_runtime.h>
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#endif
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using namespace nv;
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using namespace cuda;
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#if NV_OS_WIN32
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#define WINDOWS_LEAN_AND_MEAN
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#include <windows.h>
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static bool isWindowsVista()
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{
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OSVERSIONINFO osvi;
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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::GetVersionEx(&osvi);
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return osvi.dwMajorVersion >= 6;
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}
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typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
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static bool isWow32()
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{
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LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(GetModuleHandle("kernel32"), "IsWow64Process");
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BOOL bIsWow64 = FALSE;
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if (NULL != fnIsWow64Process)
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{
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if (!fnIsWow64Process(GetCurrentProcess(), &bIsWow64))
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{
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// Assume 32 bits.
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return true;
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}
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}
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return !bIsWow64;
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}
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#endif
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static bool isCudaDriverAvailable(uint version)
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{
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#if NV_OS_WIN32
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Library nvcuda("nvcuda.dll");
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#else
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Library nvcuda(NV_LIBRARY_NAME("cuda"));
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#endif
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if (!nvcuda.isValid())
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{
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return false;
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}
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if (version > 2000)
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{
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void * address = nvcuda.bindSymbol("cuStreamCreate");
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if (address == NULL) return false;
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}
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if (version > 2010)
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{
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void * address = nvcuda.bindSymbol("cuLoadDataEx");
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if (address == NULL) return false;
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}
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return true;
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}
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/// Determine if CUDA is available.
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bool nv::cuda::isHardwarePresent()
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{
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#if defined HAVE_CUDA
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#if NV_OS_WIN32
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//if (isWindowsVista()) return false;
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//if (isWindowsVista() || !isWow32()) return false;
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#endif
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int count = deviceCount();
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if (count == 1)
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{
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// Make sure it's not an emulation device.
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cudaDeviceProp deviceProp;
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cudaGetDeviceProperties(&deviceProp, 0);
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// deviceProp.name != Device Emulation (CPU)
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if (deviceProp.major == -1 || deviceProp.minor == -1)
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{
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return false;
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}
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// Make sure that CUDA driver matches CUDA runtime.
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if (!isCudaDriverAvailable(CUDART_VERSION))
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{
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return false;
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}
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// @@ Make sure that warp size == 32
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}
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return count > 0;
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#else
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return false;
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#endif
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}
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/// Get number of CUDA enabled devices.
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int nv::cuda::deviceCount()
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{
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#if defined HAVE_CUDA
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int gpuCount = 0;
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cudaError_t result = cudaGetDeviceCount(&gpuCount);
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if (result == cudaSuccess)
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{
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return gpuCount;
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}
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#endif
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return 0;
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}
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/// Activate the given devices.
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bool nv::cuda::setDevice(int i)
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{
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nvCheck(i < deviceCount());
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#if defined HAVE_CUDA
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cudaError_t result = cudaSetDevice(i);
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return result == cudaSuccess;
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#else
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return false;
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#endif
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}
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