Mercurial > hg > truffle
view src/os_gpu/linux_ptx/vm/gpu_linux.cpp @ 13691:056d9d7dc061
expose memory map merging functionality in FloatingReadPhase
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 15 Jan 2014 16:08:57 +0100 |
parents | 5465ba051280 |
children |
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/* * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "runtime/gpu.hpp" #include "utilities/ostream.hpp" void gpu::probe_gpu() { set_available(gpu::Linux::probe_gpu()); if (TraceGPUInteraction) { tty->print_cr("gpu_linux::probe_gpu(): %d", gpu::is_available()); } } /* * Probe for CUDA device on PCI bus using /proc/bus/pci/devices. Do * not rely on CUDA tool kit being installed. We will check if CUDA * library is installed later. */ static unsigned int nvidia_vendor_id = 0x10de; static unsigned int amd_vendor_id = 0x1002; bool gpu::Linux::probe_gpu() { /* * The simulator only depends on shared libraries. * That linkage is checked in a later step. */ if (UseHSAILSimulator) { set_target_il_type(gpu::HSAIL); if (TraceGPUInteraction) { tty->print_cr("Setup HSAIL Simulator"); } return true; } /* * Open /proc/bus/pci/devices to look for the first GPU device. For * now, we will just find the first GPU device. Will need to revisit * this to support execution on multiple GPU devices, if they exist. */ FILE *pci_devices = fopen("/proc/bus/pci/devices", "r"); char contents[4096]; unsigned int bus_num_devfn_ign; unsigned int vendor; unsigned int device; bool gpu_device_exists = false; if (pci_devices == NULL) { tty->print_cr("*** Failed to open /proc/bus/pci/devices"); return gpu_device_exists; } while (fgets(contents, sizeof(contents)-1, pci_devices)) { sscanf(contents, "%04x%04x%04x", &bus_num_devfn_ign, &vendor, &device); /* Break after finding the first GPU device. */ if (vendor == nvidia_vendor_id) { gpu_device_exists = true; set_target_il_type(gpu::PTX); if (TraceGPUInteraction) { tty->print_cr("Found supported nVidia GPU device vendor : 0x%04x device 0x%04x", vendor, device); } break; /* * Remove AMD detection until we decide how to detect real HSA hardware. * In the current form this check does not work correctly on AMD CPU system with * Nvidia GPU. * * } else if (vendor == amd_vendor_id) { * gpu_device_exists = true; * set_target_il_type(gpu::HSAIL); * if (TraceGPUInteraction) { * tty->print_cr("Found supported AMD GPU device vendor : 0x%04x device 0x%04x", vendor, device); * } * break; */ } } // Close file pointer. fclose(pci_devices); return gpu_device_exists; }