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.
IsPciSupported()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.
CollectDriverVersionATI()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
CollectPCIVideoCardInfo(GPUInfo * gpu_info)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
CollectContextGraphicsInfo(GPUInfo * gpu_info)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
CollectGpuID(uint32 * vendor_id,uint32 * device_id)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
CollectBasicGraphicsInfo(GPUInfo * gpu_info)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
CollectDriverInfoGL(GPUInfo * gpu_info)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
MergeGPUInfo(GPUInfo * basic_gpu_info,const GPUInfo & context_gpu_info)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