Use nv contrl x extension to query nvidia driver version.

content/gpu/gpu_info_collector_linux.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/gpu/gpu_info_collector.h"
 
 #include <dlfcn.h>
+#include <X11/Xlib.h>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
 #include "base/string_piece.h"
 #include "base/string_split.h"
 #include "base/string_tokenizer.h"
 #include "base/string_util.h"
+#include "third_party/libXNVCtrl/NVCtrl.h"
+#include "third_party/libXNVCtrl/NVCtrlLib.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gl_switches.h"
 
 namespace {
 
 // PciDevice and PciAccess are defined to access libpci functions.  Their
 // members match the corresponding structures defined by libpci in size up to
@@ skipping 102 matching lines @@
 
 // This close the dynamically opened libpci and delete the interface.
 void FinalizeLibPci(PciInterface** interface) {
   DCHECK(interface && *interface && (*interface)->lib_handle);
   dlclose((*interface)->lib_handle);
   delete (*interface);
   *interface = NULL;
 }
 
 // Scan /etc/ati/amdpcsdb.default for "ReleaseVersion".
-// Return "" on failing.
+// Return empty string on failing.
 std::string CollectDriverVersionATI() {
   const FilePath::CharType kATIFileName[] =
       FILE_PATH_LITERAL("/etc/ati/amdpcsdb.default");
   FilePath ati_file_path(kATIFileName);
   if (!file_util::PathExists(ati_file_path))
-    return "";
+    return std::string();
   std::string contents;
   if (!file_util::ReadFileToString(ati_file_path, &contents))
-    return "";
+    return std::string();
   StringTokenizer t(contents, "\r\n");
   while (t.GetNext()) {
     std::string line = t.token();
     if (StartsWithASCII(line, "ReleaseVersion=", true)) {
       size_t begin = line.find_first_of("0123456789");
       if (begin != std::string::npos) {
         size_t end = line.find_first_not_of("0123456789.", begin);
         if (end == std::string::npos)
           return line.substr(begin);
         else
           return line.substr(begin, end - begin);
       }
     }
   }
-  return "";
+  return std::string();
+}
+
+// Use NVCtrl extention to query NV driver version.
+// Return empty string on failing.
+std::string CollectDriverVersionNVidia() {
+  Display* display = base::MessagePumpForUI::GetDefaultXDisplay();
+  if (!display) {
+    LOG(ERROR) << "XOpenDisplay failed.";
+    return std::string();
+  }
+  int event_base = 0, error_base = 0;
+  if (!XNVCTRLQueryExtension(display, &event_base, &error_base)) {
+    LOG(INFO) << "NVCtrl extension does not exits.";
+    return std::string();
+  }
+  int screen_count = ScreenCount(display);
+  for (int screen = 0; screen < screen_count; ++screen) {
+    char* buffer = NULL;
+    if (XNVCTRLIsNvScreen(display, screen) &&
+        XNVCTRLQueryStringAttribute(display, screen, 0,
+                                    NV_CTRL_STRING_NVIDIA_DRIVER_VERSION,
+                                    &buffer)) {
+      std::string driver_version(buffer);
+      XFree(buffer);
+      return driver_version;
+    }
+  }
+  return std::string();
 }
 
 const uint32 kVendorIDIntel = 0x8086;
 const uint32 kVendorIDNVidia = 0x10de;
 const uint32 kVendorIDAMD = 0x1002;
 
 }  // namespace anonymous
 
 namespace gpu_info_collector {
 
@@ skipping 16 matching lines @@
   bool rt = CollectGraphicsInfoGL(gpu_info);
 
   return rt;
 }
 
 bool CollectPreliminaryGraphicsInfo(content::GPUInfo* gpu_info) {
   DCHECK(gpu_info);
 
   bool rt = CollectVideoCardInfo(gpu_info);
 
-  if (gpu_info->gpu.vendor_id == kVendorIDAMD) {
-    std::string ati_driver_version = CollectDriverVersionATI();
-    if (!ati_driver_version.empty()) {
-      gpu_info->driver_vendor = "ATI / AMD";
-      gpu_info->driver_version = ati_driver_version;
-    }
+  std::string driver_version;
+  switch (gpu_info->gpu.vendor_id) {
+    case kVendorIDAMD:
+      driver_version = CollectDriverVersionATI();
+      if (!driver_version.empty()) {
+        gpu_info->driver_vendor = "ATI / AMD";
+        gpu_info->driver_version = driver_version;
+      }
+      break;
+    case kVendorIDNVidia:
+      driver_version = CollectDriverVersionNVidia();
+      if (!driver_version.empty()) {
+        gpu_info->driver_vendor = "NVIDIA";
+        gpu_info->driver_version = driver_version;
+      }
+      break;
   }
 
   return rt;
 }
 
 bool CollectVideoCardInfo(content::GPUInfo* gpu_info) {
   DCHECK(gpu_info);
 
   if (IsPciSupported() == false) {
     VLOG(1) << "PCI bus scanning is not supported";
@@ skipping 103 matching lines @@
     return false;
   if (pos != std::string::npos)
     driver_version = driver_version.substr(0, pos);
 
   gpu_info->driver_vendor = pieces[1];
   gpu_info->driver_version = driver_version;
   return true;
 }
 
 }  // namespace gpu_info_collector