1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <X11/Xlib.h>
6
7#include "base/logging.h"
8#include "gpu/config/gpu_info_collector_linux.h"
9#include "third_party/libXNVCtrl/NVCtrl.h"
10#include "third_party/libXNVCtrl/NVCtrlLib.h"
11#include "ui/gfx/x/x11_types.h"
12
13namespace gpu {
14
15// Use NVCtrl extention to query NV driver version.
16// Return empty string on failing.
17std::string CollectDriverVersionNVidia() {
18  Display* display = gfx::GetXDisplay();
19  if (!display) {
20    LOG(ERROR) << "XOpenDisplay failed.";
21    return std::string();
22  }
23  int event_base = 0, error_base = 0;
24  if (!XNVCTRLQueryExtension(display, &event_base, &error_base)) {
25    VLOG(1) << "NVCtrl extension does not exist.";
26    return std::string();
27  }
28  int screen_count = ScreenCount(display);
29  for (int screen = 0; screen < screen_count; ++screen) {
30    char* buffer = NULL;
31    if (XNVCTRLIsNvScreen(display, screen) &&
32        XNVCTRLQueryStringAttribute(display, screen, 0,
33                                    NV_CTRL_STRING_NVIDIA_DRIVER_VERSION,
34                                    &buffer)) {
35      std::string driver_version(buffer);
36      XFree(buffer);
37      return driver_version;
38    }
39  }
40  return std::string();
41}
42
43}  // namespace gpu
44