SystemInfo_mac.mm

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Author : James Darpinian
Date : 2019-09-04 16:56:25
Hash : eb4f2d50
Message : Fix WebKit iOS build WebKit's iOS and Mac builds do conditional compilation with preprocessor directives rather than relying on the build system. Cocoa.h is not available on iOS, so these Objective-C files must be conditionally compiled. Bug: angleproject:3439 Change-Id: I8a1228f5b14ca6441c7d9a7f1c3f45d060003135 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1785653 Commit-Queue: James Darpinian <jdarpinian@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

src/gpu_info_util/SystemInfo_mac.mm

//
// Copyright 2017 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// SystemInfo_mac.cpp: implementation of the Mac-specific parts of SystemInfo.h

#if __has_include(<Cocoa/Cocoa.h>)

#    include "gpu_info_util/SystemInfo_internal.h"

#    import <Cocoa/Cocoa.h>
#    import <IOKit/IOKitLib.h>

namespace angle
{

namespace
{

using PlatformDisplayID = uint32_t;

constexpr CGLRendererProperty kCGLRPRegistryIDLow  = static_cast<CGLRendererProperty>(140);
constexpr CGLRendererProperty kCGLRPRegistryIDHigh = static_cast<CGLRendererProperty>(141);

// Code from WebKit to get the active GPU's ID given a display ID.
uint64_t GetGpuIDFromDisplayID(PlatformDisplayID displayID)
{
    GLuint displayMask              = CGDisplayIDToOpenGLDisplayMask(displayID);
    GLint numRenderers              = 0;
    CGLRendererInfoObj rendererInfo = nullptr;
    CGLError error = CGLQueryRendererInfo(displayMask, &rendererInfo, &numRenderers);
    if (!numRenderers || !rendererInfo || error != kCGLNoError)
        return 0;

    // The 0th renderer should not be the software renderer.
    GLint isAccelerated;
    error = CGLDescribeRenderer(rendererInfo, 0, kCGLRPAccelerated, &isAccelerated);
    if (!isAccelerated || error != kCGLNoError)
    {
        CGLDestroyRendererInfo(rendererInfo);
        return 0;
    }

    GLint gpuIDLow  = 0;
    GLint gpuIDHigh = 0;

    error = CGLDescribeRenderer(rendererInfo, 0, kCGLRPRegistryIDLow, &gpuIDLow);

    if (error != kCGLNoError || gpuIDLow < 0)
    {
        CGLDestroyRendererInfo(rendererInfo);
        return 0;
    }

    error = CGLDescribeRenderer(rendererInfo, 0, kCGLRPRegistryIDHigh, &gpuIDHigh);
    if (error != kCGLNoError || gpuIDHigh < 0)
    {
        CGLDestroyRendererInfo(rendererInfo);
        return 0;
    }

    CGLDestroyRendererInfo(rendererInfo);
    return static_cast<uint64_t>(gpuIDHigh) << 32 | gpuIDLow;
}

std::string GetMachineModel()
{
    io_service_t platformExpert = IOServiceGetMatchingService(
        kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));

    if (platformExpert == IO_OBJECT_NULL)
    {
        return "";
    }

    CFDataRef modelData = static_cast<CFDataRef>(
        IORegistryEntryCreateCFProperty(platformExpert, CFSTR("model"), kCFAllocatorDefault, 0));
    if (modelData == nullptr)
    {
        IOObjectRelease(platformExpert);
        return "";
    }

    std::string result = reinterpret_cast<const char *>(CFDataGetBytePtr(modelData));

    IOObjectRelease(platformExpert);
    CFRelease(modelData);

    return result;
}

// Extracts one integer property from a registry entry.
bool GetEntryProperty(io_registry_entry_t entry, CFStringRef name, uint32_t *value)
{
    *value = 0;

    CFDataRef data = static_cast<CFDataRef>(
        IORegistryEntrySearchCFProperty(entry, kIOServicePlane, name, kCFAllocatorDefault,
                                        kIORegistryIterateRecursively | kIORegistryIterateParents));

    if (data == nullptr)
    {
        return false;
    }

    const uint32_t *valuePtr = reinterpret_cast<const uint32_t *>(CFDataGetBytePtr(data));

    if (valuePtr == nullptr)
    {
        CFRelease(data);
        return false;
    }

    *value = *valuePtr;
    CFRelease(data);
    return true;
}

// Gathers the vendor and device IDs for the PCI GPUs
bool GetPCIDevices(std::vector<GPUDeviceInfo> *devices)
{
    // matchDictionary will be consumed by IOServiceGetMatchingServices, no need to release it.
    CFMutableDictionaryRef matchDictionary = IOServiceMatching("IOPCIDevice");

    io_iterator_t entryIterator;
    if (IOServiceGetMatchingServices(kIOMasterPortDefault, matchDictionary, &entryIterator) !=
        kIOReturnSuccess)
    {
        return false;
    }

    io_registry_entry_t entry = IO_OBJECT_NULL;

    while ((entry = IOIteratorNext(entryIterator)) != IO_OBJECT_NULL)
    {
        constexpr uint32_t kClassCodeDisplayVGA = 0x30000;
        uint32_t classCode;
        GPUDeviceInfo info;

        if (GetEntryProperty(entry, CFSTR("class-code"), &classCode) &&
            classCode == kClassCodeDisplayVGA &&
            GetEntryProperty(entry, CFSTR("vendor-id"), &info.vendorId) &&
            GetEntryProperty(entry, CFSTR("device-id"), &info.deviceId))
        {
            devices->push_back(info);
        }

        IOObjectRelease(entry);
    }
    IOObjectRelease(entryIterator);

    return true;
}

void SetActiveGPUIndex(SystemInfo *info)
{
    VendorID activeVendor;
    DeviceID activeDevice;

    uint64_t gpuID = GetGpuIDFromDisplayID(kCGDirectMainDisplay);

    if (gpuID == 0)
        return;

    CFMutableDictionaryRef matchDictionary = IORegistryEntryIDMatching(gpuID);
    io_service_t gpuEntry = IOServiceGetMatchingService(kIOMasterPortDefault, matchDictionary);

    if (gpuEntry == IO_OBJECT_NULL)
    {
        IOObjectRelease(gpuEntry);
        return;
    }

    if (!(GetEntryProperty(gpuEntry, CFSTR("vendor-id"), &activeVendor) &&
          GetEntryProperty(gpuEntry, CFSTR("device-id"), &activeDevice)))
    {
        IOObjectRelease(gpuEntry);
        return;
    }

    IOObjectRelease(gpuEntry);

    for (size_t i = 0; i < info->gpus.size(); ++i)
    {
        if (info->gpus[i].vendorId == activeVendor && info->gpus[i].deviceId == activeDevice)
        {
            info->activeGPUIndex = static_cast<int>(i);
            break;
        }
    }
}

}  // anonymous namespace

bool GetSystemInfo(SystemInfo *info)
{
    {
        int32_t major = 0;
        int32_t minor = 0;
        ParseMacMachineModel(GetMachineModel(), &info->machineModelName, &major, &minor);
        info->machineModelVersion = std::to_string(major) + "." + std::to_string(minor);
    }

    if (!GetPCIDevices(&(info->gpus)))
    {
        return false;
    }

    if (info->gpus.empty())
    {
        return false;
    }

    // Call the generic GetDualGPUInfo function to initialize info fields
    // such as isOptimus, isAMDSwitchable, and the activeGPUIndex
    GetDualGPUInfo(info);

    // Then override the activeGPUIndex field of info to reflect the current
    // GPU instead of the non-intel GPU
    if (@available(macOS 10.13, *))
    {
        SetActiveGPUIndex(info);
    }

    // Figure out whether this is a dual-GPU system.
    //
    // TODO(kbr): this code was ported over from Chromium, and its correctness
    // could be improved - need to use Mac-specific APIs to determine whether
    // offline renderers are allowed, and whether these two GPUs are really the
    // integrated/discrete GPUs in a laptop.
    if (info->gpus.size() == 2 &&
        ((IsIntel(info->gpus[0].vendorId) && !IsIntel(info->gpus[1].vendorId)) ||
         (!IsIntel(info->gpus[0].vendorId) && IsIntel(info->gpus[1].vendorId))))
    {
        info->isMacSwitchable = true;
    }

    return true;
}

}  // namespace angle

#endif  // __has_include(<Cocoa/Cocoa.h>)

kc3-lang/angle/src/gpu_info_util/SystemInfo_mac.mm

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kc3-lang/angle /src/gpu_info_util/SystemInfo_mac.mm