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// Copyright 2014 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 "gpu/config/gpu_info_collector_linux.h"
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/trace_event/trace_event.h"
#include "gpu/config/gpu_info_collector.h"
#include "gpu/config/gpu_switches.h"
#include "third_party/re2/src/re2/re2.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"
#if defined(USE_LIBPCI)
#include "library_loaders/libpci.h" // nogncheck
#endif
namespace gpu {
namespace {
#if defined(USE_LIBPCI)
// This checks if a system supports PCI bus.
// We check the existence of /sys/bus/pci or /sys/bug/pci_express.
bool IsPciSupported() {
const base::FilePath pci_path("/sys/bus/pci/");
const base::FilePath pcie_path("/sys/bus/pci_express/");
return (base::PathExists(pci_path) ||
base::PathExists(pcie_path));
}
#endif // defined(USE_LIBPCI)
// Scan /sys/module/amdgpu/version.
// Return empty string on failing.
std::string CollectDriverVersionAMDBrahma() {
const base::FilePath ati_file_path("/sys/module/amdgpu/version");
if (!base::PathExists(ati_file_path))
return std::string();
std::string contents;
if (!base::ReadFileToString(ati_file_path, &contents))
return std::string();
size_t begin = contents.find_first_of("0123456789");
if (begin != std::string::npos) {
size_t end = contents.find_first_not_of("0123456789.", begin);
if (end == std::string::npos)
return contents.substr(begin);
else
return contents.substr(begin, end - begin);
}
return std::string();
}
// Scan /etc/ati/amdpcsdb.default for "ReleaseVersion".
// Return empty string on failing.
std::string CollectDriverVersionAMDCatalyst() {
const base::FilePath ati_file_path("/etc/ati/amdpcsdb.default");
if (!base::PathExists(ati_file_path))
return std::string();
std::string contents;
if (!base::ReadFileToString(ati_file_path, &contents))
return std::string();
base::StringTokenizer t(contents, "\r\n");
while (t.GetNext()) {
std::string line = t.token();
if (base::StartsWith(line, "ReleaseVersion=",
base::CompareCase::SENSITIVE)) {
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 std::string();
}
const uint32_t kVendorIDIntel = 0x8086;
const uint32_t kVendorIDNVidia = 0x10de;
const uint32_t kVendorIDAMD = 0x1002;
CollectInfoResult CollectPCIVideoCardInfo(GPUInfo* gpu_info) {
DCHECK(gpu_info);
#if !defined(USE_LIBPCI)
return kCollectInfoNonFatalFailure;
#else
if (IsPciSupported() == false) {
VLOG(1) << "PCI bus scanning is not supported";
return kCollectInfoNonFatalFailure;
}
// TODO(zmo): be more flexible about library name.
LibPciLoader libpci_loader;
if (!libpci_loader.Load("libpci.so.3") &&
!libpci_loader.Load("libpci.so")) {
VLOG(1) << "Failed to locate libpci";
return kCollectInfoNonFatalFailure;
}
pci_access* access = (libpci_loader.pci_alloc)();
DCHECK(access != NULL);
(libpci_loader.pci_init)(access);
(libpci_loader.pci_scan_bus)(access);
bool primary_gpu_identified = false;
for (pci_dev* device = access->devices;
device != NULL; device = device->next) {
// Fill the IDs and class fields.
(libpci_loader.pci_fill_info)(device, 33);
bool is_gpu = false;
switch (device->device_class) {
case PCI_CLASS_DISPLAY_VGA:
case PCI_CLASS_DISPLAY_XGA:
case PCI_CLASS_DISPLAY_3D:
is_gpu = true;
break;
case PCI_CLASS_DISPLAY_OTHER:
default:
break;
}
if (!is_gpu)
continue;
if (device->vendor_id == 0 || device->device_id == 0)
continue;
GPUInfo::GPUDevice gpu;
gpu.vendor_id = device->vendor_id;
gpu.device_id = device->device_id;
if (!primary_gpu_identified) {
primary_gpu_identified = true;
gpu_info->gpu = gpu;
} else {
// TODO(zmo): if there are multiple GPUs, we assume the non Intel
// one is primary. Revisit this logic because we actually don't know
// which GPU we are using at this point.
if (gpu_info->gpu.vendor_id == kVendorIDIntel &&
gpu.vendor_id != kVendorIDIntel) {
gpu_info->secondary_gpus.push_back(gpu_info->gpu);
gpu_info->gpu = gpu;
} else {
gpu_info->secondary_gpus.push_back(gpu);
}
}
}
// Detect Optimus or AMD Switchable GPU.
if (gpu_info->secondary_gpus.size() == 1 &&
gpu_info->secondary_gpus[0].vendor_id == kVendorIDIntel) {
if (gpu_info->gpu.vendor_id == kVendorIDNVidia)
gpu_info->optimus = true;
if (gpu_info->gpu.vendor_id == kVendorIDAMD)
gpu_info->amd_switchable = true;
}
(libpci_loader.pci_cleanup)(access);
if (!primary_gpu_identified)
return kCollectInfoNonFatalFailure;
return kCollectInfoSuccess;
#endif
}
} // namespace anonymous
CollectInfoResult CollectContextGraphicsInfo(GPUInfo* gpu_info) {
DCHECK(gpu_info);
TRACE_EVENT0("gpu", "gpu_info_collector::CollectGraphicsInfo");
CollectInfoResult result = CollectGraphicsInfoGL(gpu_info);
gpu_info->context_info_state = result;
return result;
}
CollectInfoResult CollectGpuID(uint32_t* vendor_id, uint32_t* device_id) {
DCHECK(vendor_id && device_id);
*vendor_id = 0;
*device_id = 0;
GPUInfo gpu_info;
CollectInfoResult result = CollectPCIVideoCardInfo(&gpu_info);
if (result == kCollectInfoSuccess) {
*vendor_id = gpu_info.gpu.vendor_id;
*device_id = gpu_info.gpu.device_id;
}
return result;
}
CollectInfoResult CollectBasicGraphicsInfo(GPUInfo* gpu_info) {
DCHECK(gpu_info);
CollectInfoResult result = CollectPCIVideoCardInfo(gpu_info);
std::string driver_version;
switch (gpu_info->gpu.vendor_id) {
case kVendorIDAMD:
driver_version = CollectDriverVersionAMDBrahma();
if (!driver_version.empty()) {
gpu_info->driver_vendor = "ATI / AMD (Brahma)";
gpu_info->driver_version = driver_version;
} else {
driver_version = CollectDriverVersionAMDCatalyst();
if (!driver_version.empty()) {
gpu_info->driver_vendor = "ATI / AMD (Catalyst)";
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;
case kVendorIDIntel:
// In dual-GPU cases, sometimes PCI scan only gives us the
// integrated GPU (i.e., the Intel one).
if (gpu_info->secondary_gpus.size() == 0) {
driver_version = CollectDriverVersionNVidia();
if (!driver_version.empty()) {
gpu_info->driver_vendor = "NVIDIA";
gpu_info->driver_version = driver_version;
gpu_info->optimus = true;
// Put Intel to the secondary GPU list.
gpu_info->secondary_gpus.push_back(gpu_info->gpu);
// Put NVIDIA as the primary GPU.
gpu_info->gpu.vendor_id = kVendorIDNVidia;
gpu_info->gpu.device_id = 0; // Unknown Device.
}
}
break;
}
gpu_info->basic_info_state = result;
return result;
}
CollectInfoResult CollectDriverInfoGL(GPUInfo* gpu_info) {
DCHECK(gpu_info);
// Driver vendor and version are always expected to be extracted from the
// testing gl version.
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kGpuTestingGLVersion) &&
!gpu_info->driver_vendor.empty() && !gpu_info->driver_version.empty()) {
return kCollectInfoSuccess;
}
std::string gl_version = gpu_info->gl_version;
std::vector<std::string> pieces = base::SplitString(
gl_version, base::kWhitespaceASCII, base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
// In linux, the gl version string might be in the format of
// GLVersion DriverVendor DriverVersion
if (pieces.size() < 3)
return kCollectInfoNonFatalFailure;
// Search from the end for the first piece that starts with major.minor or
// major.minor.micro but assume the driver version cannot be in the first two
// pieces.
re2::RE2 pattern("([\\d]+\\.[\\d]+(\\.[\\d]+)?).*");
std::string driver_version;
auto it = pieces.rbegin();
while (pieces.rend() - it > 2) {
bool parsed = re2::RE2::FullMatch(*it, pattern, &driver_version);
if (parsed)
break;
++it;
}
if (driver_version.empty())
return kCollectInfoNonFatalFailure;
gpu_info->driver_vendor = *(++it);
gpu_info->driver_version = driver_version;
return kCollectInfoSuccess;
}
void MergeGPUInfo(GPUInfo* basic_gpu_info,
const GPUInfo& context_gpu_info) {
MergeGPUInfoGL(basic_gpu_info, context_gpu_info);
}
} // namespace gpu