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https://github.com/RGBCube/serenity
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d61c23569e
The VirtIO specification defines many types of devices with different purposes, and it also defines 3 possible transport mediums where devices could be connected to the host machine. We only care about the PCIe transport, but this commit puts the actual foundations for supporting the lean MMIO transport too in the future. To ensure things are kept abstracted but still functional, the VirtIO transport code is responsible for what is deemed as related to an actual transport type - allocation of interrupt handlers and tinkering with low level transport-related registers, etc.
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* Copyright (c) 2023, Kirill Nikolaev <cyril7@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/Bus/VirtIO/Device.h>
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#include <Kernel/Memory/RingBuffer.h>
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#include <Kernel/Net/NetworkAdapter.h>
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namespace Kernel {
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class VirtIONetworkAdapter
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: public VirtIO::Device
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, public NetworkAdapter {
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public:
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static ErrorOr<bool> probe(PCI::DeviceIdentifier const&);
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static ErrorOr<NonnullRefPtr<NetworkAdapter>> create(PCI::DeviceIdentifier const&);
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virtual ~VirtIONetworkAdapter() override = default;
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// VirtIO::Device
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virtual ErrorOr<void> initialize_virtio_resources() override;
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// NetworkAdapter
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virtual StringView class_name() const override { return "VirtIONetworkAdapter"sv; }
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virtual Type adapter_type() const override { return Type::Ethernet; }
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virtual ErrorOr<void> initialize(Badge<NetworkingManagement>) override;
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virtual bool link_up() override { return m_link_up; }
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virtual bool link_full_duplex() override { return m_link_duplex; }
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virtual i32 link_speed() override { return m_link_speed; }
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private:
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explicit VirtIONetworkAdapter(StringView interface_name, NonnullOwnPtr<VirtIO::TransportEntity>);
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// VirtIO::Device
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virtual bool handle_device_config_change() override;
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virtual void handle_queue_update(u16 queue_index) override;
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// NetworkAdapter
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virtual void send_raw(ReadonlyBytes) override;
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private:
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VirtIO::Configuration const* m_device_config { nullptr };
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// FIXME: Make atomic as they are read without sync.
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// Note that VirtIO::NetworkAdapter may also have the same defect.
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bool m_link_up { false };
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i32 m_link_speed { LINKSPEED_INVALID };
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bool m_link_duplex { false };
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OwnPtr<Memory::RingBuffer> m_rx_buffers;
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OwnPtr<Memory::RingBuffer> m_tx_buffers;
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};
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}
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