Home | History | Annotate | Download | only in config 
      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/files/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 CollectInfoResult CollectPCIVideoCardInfo(GPUInfo* gpu_info) {
     73   DCHECK(gpu_info);
     74 
     75   if (IsPciSupported() == false) {
     76     VLOG(1) << "PCI bus scanning is not supported";
     77     return kCollectInfoNonFatalFailure;
     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 kCollectInfoNonFatalFailure;
     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     if (device->vendor_id == 0 || device->device_id == 0)
    111       continue;
    112 
    113     GPUInfo::GPUDevice gpu;
    114     gpu.vendor_id = device->vendor_id;
    115     gpu.device_id = device->device_id;
    116 
    117     if (!primary_gpu_identified) {
    118       primary_gpu_identified = true;
    119       gpu_info->gpu = gpu;
    120     } else {
    121       // TODO(zmo): if there are multiple GPUs, we assume the non Intel
    122       // one is primary. Revisit this logic because we actually don't know
    123       // which GPU we are using at this point.
    124       if (gpu_info->gpu.vendor_id == kVendorIDIntel &&
    125           gpu.vendor_id != kVendorIDIntel) {
    126         gpu_info->secondary_gpus.push_back(gpu_info->gpu);
    127         gpu_info->gpu = gpu;
    128       } else {
    129         gpu_info->secondary_gpus.push_back(gpu);
    130       }
    131     }
    132   }
    133 
    134   // Detect Optimus or AMD Switchable GPU.
    135   if (gpu_info->secondary_gpus.size() == 1 &&
    136       gpu_info->secondary_gpus[0].vendor_id == kVendorIDIntel) {
    137     if (gpu_info->gpu.vendor_id == kVendorIDNVidia)
    138       gpu_info->optimus = true;
    139     if (gpu_info->gpu.vendor_id == kVendorIDAMD)
    140       gpu_info->amd_switchable = true;
    141   }
    142 
    143   (libpci_loader.pci_cleanup)(access);
    144   if (!primary_gpu_identified)
    145     return kCollectInfoNonFatalFailure;
    146   return kCollectInfoSuccess;
    147 }
    148 
    149 }  // namespace anonymous
    150 
    151 CollectInfoResult CollectContextGraphicsInfo(GPUInfo* gpu_info) {
    152   DCHECK(gpu_info);
    153 
    154   TRACE_EVENT0("gpu", "gpu_info_collector::CollectGraphicsInfo");
    155 
    156   if (CommandLine::ForCurrentProcess()->HasSwitch(
    157           switches::kGpuNoContextLost)) {
    158     gpu_info->can_lose_context = false;
    159   } else {
    160 #if defined(OS_CHROMEOS)
    161     gpu_info->can_lose_context = false;
    162 #else
    163     // TODO(zmo): need to consider the case where we are running on top
    164     // of desktop GL and GL_ARB_robustness extension is available.
    165     gpu_info->can_lose_context =
    166         (gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2);
    167 #endif
    168   }
    169 
    170   CollectInfoResult result = CollectGraphicsInfoGL(gpu_info);
    171   gpu_info->context_info_state = result;
    172   return result;
    173 }
    174 
    175 CollectInfoResult CollectGpuID(uint32* vendor_id, uint32* device_id) {
    176   DCHECK(vendor_id && device_id);
    177   *vendor_id = 0;
    178   *device_id = 0;
    179 
    180   GPUInfo gpu_info;
    181   CollectInfoResult result = CollectPCIVideoCardInfo(&gpu_info);
    182   if (result == kCollectInfoSuccess) {
    183     *vendor_id = gpu_info.gpu.vendor_id;
    184     *device_id = gpu_info.gpu.device_id;
    185   }
    186   return result;
    187 }
    188 
    189 CollectInfoResult CollectBasicGraphicsInfo(GPUInfo* gpu_info) {
    190   DCHECK(gpu_info);
    191 
    192   CollectInfoResult result = CollectPCIVideoCardInfo(gpu_info);
    193 
    194   std::string driver_version;
    195   switch (gpu_info->gpu.vendor_id) {
    196     case kVendorIDAMD:
    197       driver_version = CollectDriverVersionATI();
    198       if (!driver_version.empty()) {
    199         gpu_info->driver_vendor = "ATI / AMD";
    200         gpu_info->driver_version = driver_version;
    201       }
    202       break;
    203     case kVendorIDNVidia:
    204       driver_version = CollectDriverVersionNVidia();
    205       if (!driver_version.empty()) {
    206         gpu_info->driver_vendor = "NVIDIA";
    207         gpu_info->driver_version = driver_version;
    208       }
    209       break;
    210     case kVendorIDIntel:
    211       // In dual-GPU cases, sometimes PCI scan only gives us the
    212       // integrated GPU (i.e., the Intel one).
    213       if (gpu_info->secondary_gpus.size() == 0) {
    214         driver_version = CollectDriverVersionNVidia();
    215         if (!driver_version.empty()) {
    216           gpu_info->driver_vendor = "NVIDIA";
    217           gpu_info->driver_version = driver_version;
    218           gpu_info->optimus = true;
    219           // Put Intel to the secondary GPU list.
    220           gpu_info->secondary_gpus.push_back(gpu_info->gpu);
    221           // Put NVIDIA as the primary GPU.
    222           gpu_info->gpu.vendor_id = kVendorIDNVidia;
    223           gpu_info->gpu.device_id = 0;  // Unknown Device.
    224         }
    225       }
    226       break;
    227   }
    228 
    229   gpu_info->basic_info_state = result;
    230   return result;
    231 }
    232 
    233 CollectInfoResult CollectDriverInfoGL(GPUInfo* gpu_info) {
    234   DCHECK(gpu_info);
    235 
    236   std::string gl_version = gpu_info->gl_version;
    237   if (StartsWithASCII(gl_version, "OpenGL ES", true))
    238     gl_version = gl_version.substr(10);
    239   std::vector<std::string> pieces;
    240   base::SplitStringAlongWhitespace(gl_version, &pieces);
    241   // In linux, the gl version string might be in the format of
    242   //   GLVersion DriverVendor DriverVersion
    243   if (pieces.size() < 3)
    244     return kCollectInfoNonFatalFailure;
    245 
    246   std::string driver_version = pieces[2];
    247   size_t pos = driver_version.find_first_not_of("0123456789.");
    248   if (pos == 0)
    249     return kCollectInfoNonFatalFailure;
    250   if (pos != std::string::npos)
    251     driver_version = driver_version.substr(0, pos);
    252 
    253   gpu_info->driver_vendor = pieces[1];
    254   gpu_info->driver_version = driver_version;
    255   return kCollectInfoSuccess;
    256 }
    257 
    258 void MergeGPUInfo(GPUInfo* basic_gpu_info,
    259                   const GPUInfo& context_gpu_info) {
    260   MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
    261 }
    262 
    263 }  // namespace gpu
    264