gpu/config/gpu_info_collector_linux.cc

   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 "gpu/config/gpu_info_collector_linux.h"
   6
   7 #include <vector>
   8
   9 #include "base/command_line.h"
  10 #include "base/debug/trace_event.h"
  11 #include "base/file_util.h"
  12 #include "base/logging.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/message_loop/message_loop.h"
  15 #include "base/strings/string_piece.h"
  16 #include "base/strings/string_split.h"
  17 #include "base/strings/string_tokenizer.h"
  18 #include "base/strings/string_util.h"
  19 #include "gpu/config/gpu_info_collector.h"
  20 #include "library_loaders/libpci.h"
  21 #include "ui/gl/gl_bindings.h"
  22 #include "ui/gl/gl_context.h"
  23 #include "ui/gl/gl_implementation.h"
  24 #include "ui/gl/gl_surface.h"
  25 #include "ui/gl/gl_switches.h"
  26
  27 namespace gpu {
  28
  29 namespace {
  30
  31 // This checks if a system supports PCI bus.
  32 // We check the existence of /sys/bus/pci or /sys/bug/pci_express.
  33 bool IsPciSupported() {
  34   const base::FilePath pci_path("/sys/bus/pci/");
  35   const base::FilePath pcie_path("/sys/bus/pci_express/");
  36   return (base::PathExists(pci_path) ||
  37           base::PathExists(pcie_path));
  38 }
  39
  40 // Scan /etc/ati/amdpcsdb.default for "ReleaseVersion".
  41 // Return empty string on failing.
  42 std::string CollectDriverVersionATI() {
  43   const base::FilePath::CharType kATIFileName[] =
  44       FILE_PATH_LITERAL("/etc/ati/amdpcsdb.default");
  45   base::FilePath ati_file_path(kATIFileName);
  46   if (!base::PathExists(ati_file_path))
  47     return std::string();
  48   std::string contents;
  49   if (!base::ReadFileToString(ati_file_path, &contents))
  50     return std::string();
  51   base::StringTokenizer t(contents, "\r\n");
  52   while (t.GetNext()) {
  53     std::string line = t.token();
  54     if (StartsWithASCII(line, "ReleaseVersion=", true)) {
  55       size_t begin = line.find_first_of("0123456789");
  56       if (begin != std::string::npos) {
  57         size_t end = line.find_first_not_of("0123456789.", begin);
  58         if (end == std::string::npos)
  59           return line.substr(begin);
  60         else
  61           return line.substr(begin, end - begin);
  62       }
  63     }
  64   }
  65   return std::string();
  66 }
  67
  68 const uint32 kVendorIDIntel = 0x8086;
  69 const uint32 kVendorIDNVidia = 0x10de;
  70 const uint32 kVendorIDAMD = 0x1002;
  71
  72 bool CollectPCIVideoCardInfo(GPUInfo* gpu_info) {
  73   DCHECK(gpu_info);
  74
  75   if (IsPciSupported() == false) {
  76     VLOG(1) << "PCI bus scanning is not supported";
  77     return false;
  78   }
  79
  80   // TODO(zmo): be more flexible about library name.
  81   LibPciLoader libpci_loader;
  82   if (!libpci_loader.Load("libpci.so.3") &&
  83       !libpci_loader.Load("libpci.so")) {
  84     VLOG(1) << "Failed to locate libpci";
  85     return false;
  86   }
  87
  88   pci_access* access = (libpci_loader.pci_alloc)();
  89   DCHECK(access != NULL);
  90   (libpci_loader.pci_init)(access);
  91   (libpci_loader.pci_scan_bus)(access);
  92   bool primary_gpu_identified = false;
  93   for (pci_dev* device = access->devices;
  94        device != NULL; device = device->next) {
  95     // Fill the IDs and class fields.
  96     (libpci_loader.pci_fill_info)(device, 33);
  97     bool is_gpu = false;
  98     switch (device->device_class) {
  99       case PCI_CLASS_DISPLAY_VGA:
 100       case PCI_CLASS_DISPLAY_XGA:
 101       case PCI_CLASS_DISPLAY_3D:
 102         is_gpu = true;
 103         break;
 104       case PCI_CLASS_DISPLAY_OTHER:
 105       default:
 106         break;
 107     }
 108     if (!is_gpu)
 109       continue;
 110
 111     GPUInfo::GPUDevice gpu;
 112     gpu.vendor_id = device->vendor_id;
 113     gpu.device_id = device->device_id;
 114
 115     if (!primary_gpu_identified) {
 116       primary_gpu_identified = true;
 117       gpu_info->gpu = gpu;
 118     } else {
 119       // TODO(zmo): if there are multiple GPUs, we assume the non Intel
 120       // one is primary. Revisit this logic because we actually don't know
 121       // which GPU we are using at this point.
 122       if (gpu_info->gpu.vendor_id == kVendorIDIntel &&
 123           gpu.vendor_id != kVendorIDIntel) {
 124         gpu_info->secondary_gpus.push_back(gpu_info->gpu);
 125         gpu_info->gpu = gpu;
 126       } else {
 127         gpu_info->secondary_gpus.push_back(gpu);
 128       }
 129     }
 130   }
 131
 132   // Detect Optimus or AMD Switchable GPU.
 133   if (gpu_info->secondary_gpus.size() == 1 &&
 134       gpu_info->secondary_gpus[0].vendor_id == kVendorIDIntel) {
 135     if (gpu_info->gpu.vendor_id == kVendorIDNVidia)
 136       gpu_info->optimus = true;
 137     if (gpu_info->gpu.vendor_id == kVendorIDAMD)
 138       gpu_info->amd_switchable = true;
 139   }
 140
 141   (libpci_loader.pci_cleanup)(access);
 142   return (primary_gpu_identified);
 143 }
 144
 145 }  // namespace anonymous
 146
 147 CollectInfoResult CollectContextGraphicsInfo(GPUInfo* gpu_info) {
 148   DCHECK(gpu_info);
 149
 150   TRACE_EVENT0("gpu", "gpu_info_collector::CollectGraphicsInfo");
 151
 152   if (CommandLine::ForCurrentProcess()->HasSwitch(
 153           switches::kGpuNoContextLost)) {
 154     gpu_info->can_lose_context = false;
 155   } else {
 156 #if defined(OS_CHROMEOS)
 157     gpu_info->can_lose_context = false;
 158 #else
 159     // TODO(zmo): need to consider the case where we are running on top
 160     // of desktop GL and GL_ARB_robustness extension is available.
 161     gpu_info->can_lose_context =
 162         (gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2);
 163 #endif
 164   }
 165
 166   CollectInfoResult result = CollectGraphicsInfoGL(gpu_info);
 167   gpu_info->finalized = true;
 168   return result;
 169 }
 170
 171 GpuIDResult CollectGpuID(uint32* vendor_id, uint32* device_id) {
 172   DCHECK(vendor_id && device_id);
 173   *vendor_id = 0;
 174   *device_id = 0;
 175
 176   GPUInfo gpu_info;
 177   if (CollectPCIVideoCardInfo(&gpu_info)) {
 178     *vendor_id = gpu_info.gpu.vendor_id;
 179     *device_id = gpu_info.gpu.device_id;
 180     if (*vendor_id != 0 && *device_id != 0)
 181       return kGpuIDSuccess;
 182   }
 183   return kGpuIDFailure;
 184 }
 185
 186 CollectInfoResult CollectBasicGraphicsInfo(GPUInfo* gpu_info) {
 187   DCHECK(gpu_info);
 188
 189   bool rt = CollectPCIVideoCardInfo(gpu_info);
 190
 191   std::string driver_version;
 192   switch (gpu_info->gpu.vendor_id) {
 193     case kVendorIDAMD:
 194       driver_version = CollectDriverVersionATI();
 195       if (!driver_version.empty()) {
 196         gpu_info->driver_vendor = "ATI / AMD";
 197         gpu_info->driver_version = driver_version;
 198       }
 199       break;
 200     case kVendorIDNVidia:
 201       driver_version = CollectDriverVersionNVidia();
 202       if (!driver_version.empty()) {
 203         gpu_info->driver_vendor = "NVIDIA";
 204         gpu_info->driver_version = driver_version;
 205       }
 206       break;
 207     case kVendorIDIntel:
 208       // In dual-GPU cases, sometimes PCI scan only gives us the
 209       // integrated GPU (i.e., the Intel one).
 210       if (gpu_info->secondary_gpus.size() == 0) {
 211         driver_version = CollectDriverVersionNVidia();
 212         if (!driver_version.empty()) {
 213           gpu_info->driver_vendor = "NVIDIA";
 214           gpu_info->driver_version = driver_version;
 215           gpu_info->optimus = true;
 216           // Put Intel to the secondary GPU list.
 217           gpu_info->secondary_gpus.push_back(gpu_info->gpu);
 218           // Put NVIDIA as the primary GPU.
 219           gpu_info->gpu.vendor_id = kVendorIDNVidia;
 220           gpu_info->gpu.device_id = 0;  // Unknown Device.
 221         }
 222       }
 223       break;
 224   }
 225
 226   return rt ? kCollectInfoSuccess : kCollectInfoNonFatalFailure;
 227 }
 228
 229 CollectInfoResult CollectDriverInfoGL(GPUInfo* gpu_info) {
 230   DCHECK(gpu_info);
 231
 232   std::string gl_version = gpu_info->gl_version;
 233   if (StartsWithASCII(gl_version, "OpenGL ES", true))
 234     gl_version = gl_version.substr(10);
 235   std::vector<std::string> pieces;
 236   base::SplitStringAlongWhitespace(gl_version, &pieces);
 237   // In linux, the gl version string might be in the format of
 238   //   GLVersion DriverVendor DriverVersion
 239   if (pieces.size() < 3)
 240     return kCollectInfoNonFatalFailure;
 241
 242   std::string driver_version = pieces[2];
 243   size_t pos = driver_version.find_first_not_of("0123456789.");
 244   if (pos == 0)
 245     return kCollectInfoNonFatalFailure;
 246   if (pos != std::string::npos)
 247     driver_version = driver_version.substr(0, pos);
 248
 249   gpu_info->driver_vendor = pieces[1];
 250   gpu_info->driver_version = driver_version;
 251   return kCollectInfoSuccess;
 252 }
 253
 254 void MergeGPUInfo(GPUInfo* basic_gpu_info,
 255                   const GPUInfo& context_gpu_info) {
 256   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
 257 }
 258
 259 }  // namespace gpu