src/gromacs/gpu_utils/device_context_ocl.cpp

   1 /*
   2  * This file is part of the GROMACS molecular simulation package.
   3  *
   4  * Copyright (c) 2020, by the GROMACS development team, led by
   5  * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
   6  * and including many others, as listed in the AUTHORS file in the
   7  * top-level source directory and at http://www.gromacs.org.
   8  *
   9  * GROMACS is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public License
  11  * as published by the Free Software Foundation; either version 2.1
  12  * of the License, or (at your option) any later version.
  13  *
  14  * GROMACS is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with GROMACS; if not, see
  21  * http://www.gnu.org/licenses, or write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  23  *
  24  * If you want to redistribute modifications to GROMACS, please
  25  * consider that scientific software is very special. Version
  26  * control is crucial - bugs must be traceable. We will be happy to
  27  * consider code for inclusion in the official distribution, but
  28  * derived work must not be called official GROMACS. Details are found
  29  * in the README & COPYING files - if they are missing, get the
  30  * official version at http://www.gromacs.org.
  31  *
  32  * To help us fund GROMACS development, we humbly ask that you cite
  33  * the research papers on the package. Check out http://www.gromacs.org.
  34  */
  35 /*! \internal \file
  36  *
  37  * \brief Implements the DeviceContext for OpenCL
  38  *
  39  * \author Mark Abraham <mark.j.abraham@gmail.com>
  40  * \author Artem Zhmurov <zhmurov@gmail.com>
  41  *
  42  * \ingroup module_gpu_utils
  43  */
  44 #include "gmxpre.h"
  45
  46 #include "device_context_ocl.h"
  47
  48 #include "gromacs/gpu_utils/gputraits.h"
  49 #include "gromacs/utility/exceptions.h"
  50 #include "gromacs/utility/fatalerror.h"
  51 #include "gromacs/utility/gmxassert.h"
  52 #include "gromacs/utility/stringutil.h"
  53
  54 /*! \brief Copies of values from cl_driver_diagnostics_intel.h,
  55  * which isn't guaranteed to be available. */
  56 /**@{*/
  57 #define CL_CONTEXT_SHOW_DIAGNOSTICS_INTEL 0x4106
  58 #define CL_CONTEXT_DIAGNOSTICS_LEVEL_GOOD_INTEL 0x1
  59 #define CL_CONTEXT_DIAGNOSTICS_LEVEL_BAD_INTEL 0x2
  60 #define CL_CONTEXT_DIAGNOSTICS_LEVEL_NEUTRAL_INTEL 0x4
  61 /**@}*/
  62
  63 DeviceContext::DeviceContext()
  64 {
  65     context_ = nullptr;
  66 }
  67
  68 void DeviceContext::init(const DeviceInformation& deviceInfo)
  69 {
  70     cl_platform_id                     platformId = deviceInfo.oclPlatformId;
  71     cl_device_id                       deviceId   = deviceInfo.oclDeviceId;
  72     std::vector<cl_context_properties> contextProperties;
  73
  74     contextProperties.emplace_back(CL_CONTEXT_PLATFORM);
  75     contextProperties.emplace_back(reinterpret_cast<cl_context_properties>(platformId));
  76
  77     if (getenv("GMX_OCL_SHOW_DIAGNOSTICS"))
  78     {
  79         contextProperties.emplace_back(CL_CONTEXT_SHOW_DIAGNOSTICS_INTEL);
  80         contextProperties.emplace_back(CL_CONTEXT_DIAGNOSTICS_LEVEL_BAD_INTEL
  81                                        | CL_CONTEXT_DIAGNOSTICS_LEVEL_NEUTRAL_INTEL);
  82     }
  83     contextProperties.emplace_back(0);
  84
  85     cl_int clError;
  86     context_ = clCreateContext(contextProperties.data(), 1, &deviceId, nullptr, nullptr, &clError);
  87     if (clError != CL_SUCCESS)
  88     {
  89         GMX_THROW(gmx::InternalError(gmx::formatString(
  90                 "Failed to create OpenCL context on device %s (OpenCL error ID %d).",
  91                 deviceInfo.device_name, clError)));
  92     }
  93 }
  94
  95 DeviceContext::DeviceContext(const DeviceInformation& deviceInfo)
  96 {
  97     init(deviceInfo);
  98 }
  99
 100 DeviceContext::~DeviceContext()
 101 {
 102     cl_int clError;
 103
 104     if (context_)
 105     {
 106         clError = clReleaseContext(context_);
 107         GMX_RELEASE_ASSERT(
 108                 clError == CL_SUCCESS,
 109                 gmx::formatString("Failed to release OpenCL context (OpenCL error ID %d).", clError).c_str());
 110         context_ = nullptr;
 111     }
 112 }
 113
 114 cl_context DeviceContext::context() const
 115 {
 116     return context_;
 117 }