kc3-lang/angle/src/gpu_info_util/SystemInfo_libpci.cpp

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• Hash : 9d737966
  Author :
  Date : 2019-08-14T12:25:12
  

  Standardize copyright notices to project style
  
  For all "ANGLE Project" copyrights, standardize to the format specified
  by the style guide. Changes:
  - "Copyright (c)" and "Copyright(c)" changed to just "Copyright".
  - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1").
  - Fixed a small number of files that had no copyright date using the
    initial commit year from the version control history.
  - Fixed one instance of copyright being "The ANGLE Project" rather than
    "The ANGLE Project Authors"
  
  These changes are applied both to the copyright of source file, and
  where applicable to copyright statements that are generated by
  templates.
  
  BUG=angleproject:3811
  
  Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/gpu_info_util/SystemInfo_libpci.cpp

• //
  // Copyright 2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // SystemInfo_libpci.cpp: implementation of the libPCI-specific parts of SystemInfo.h
  
  #include "gpu_info_util/SystemInfo_internal.h"
  
  #include <dlfcn.h>
  #include <pci/pci.h>
  #include <unistd.h>
  
  #include "common/angleutils.h"
  #include "common/debug.h"
  
  #if !defined(GPU_INFO_USE_LIBPCI)
  #    error SystemInfo_libpci.cpp compiled without GPU_INFO_USE_LIBPCI
  #endif
  
  namespace angle
  {
  
  namespace
  {
  
  struct LibPCI : private angle::NonCopyable
  {
      LibPCI()
      {
          if (access("/sys/bus/pci/", F_OK) != 0 && access("/sys/bs/pci_express/", F_OK) != 0)
          {
              return;
          }
  
          mHandle = dlopen("libpci.so.3", RTLD_LAZY);
  
          if (mHandle == nullptr)
          {
              mHandle = dlopen("libpci.so", RTLD_LAZY);
          }
  
          if (mHandle == nullptr)
          {
              return;
          }
  
          mValid =
              (Alloc = reinterpret_cast<decltype(Alloc)>(dlsym(mHandle, "pci_alloc"))) != nullptr &&
              (Init = reinterpret_cast<decltype(Init)>(dlsym(mHandle, "pci_init"))) != nullptr &&
              (Cleanup = reinterpret_cast<decltype(Cleanup)>(dlsym(mHandle, "pci_cleanup"))) !=
                  nullptr &&
              (ScanBus = reinterpret_cast<decltype(ScanBus)>(dlsym(mHandle, "pci_scan_bus"))) !=
                  nullptr &&
              (FillInfo = reinterpret_cast<decltype(FillInfo)>(dlsym(mHandle, "pci_fill_info"))) !=
                  nullptr &&
              (LookupName = reinterpret_cast<decltype(LookupName)>(
                   dlsym(mHandle, "pci_lookup_name"))) != nullptr;
      }
  
      bool IsValid() const { return mValid; }
  
      ~LibPCI()
      {
          if (mHandle != nullptr)
          {
              dlclose(mHandle);
          }
      }
  
      decltype(&::pci_alloc) Alloc            = nullptr;
      decltype(&::pci_init) Init              = nullptr;
      decltype(&::pci_cleanup) Cleanup        = nullptr;
      decltype(&::pci_scan_bus) ScanBus       = nullptr;
      decltype(&::pci_fill_info) FillInfo     = nullptr;
      decltype(&::pci_lookup_name) LookupName = nullptr;
  
    private:
      void *mHandle = nullptr;
      bool mValid   = false;
  };
  
  }  // anonymous namespace
  
  // Adds an entry per PCI GPU found and fills the device and vendor ID.
  bool GetPCIDevicesWithLibPCI(std::vector<GPUDeviceInfo> *devices)
  {
      LibPCI pci;
      if (!pci.IsValid())
      {
          return false;
      }
  
      pci_access *access = pci.Alloc();
      ASSERT(access != nullptr);
      pci.Init(access);
      pci.ScanBus(access);
  
      for (pci_dev *device = access->devices; device != nullptr; device = device->next)
      {
          pci.FillInfo(device, PCI_FILL_IDENT | PCI_FILL_CLASS);
  
          // Skip non-GPU devices
          switch (device->device_class)
          {
              case PCI_CLASS_DISPLAY_VGA:
              case PCI_CLASS_DISPLAY_XGA:
              case PCI_CLASS_DISPLAY_3D:
                  break;
              default:
                  continue;
          }
  
          // Skip unknown devices
          if (device->vendor_id == 0 || device->device_id == 0)
          {
              continue;
          }
  
          GPUDeviceInfo info;
          info.vendorId = device->vendor_id;
          info.deviceId = device->device_id;
  
          devices->push_back(info);
      }
  
      pci.Cleanup(access);
  
      return true;
  }
  }  // namespace angle
  

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