mirror of
https://github.com/RGBCube/serenity
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30d3f2789e
When scanning for network adapters, we give each driver a chance to claim the PCI device and whoever claims it first gets to keep it. Before this patch, the driver API returned a LockRefPtr<AdapterType>, which made it impossible to propagate errors that occurred during detection and/or initialization. This patch changes the API so that errors can bubble all the way out the PCI enumeration in NetworkingManagement::initialize() where we perform all the network adapter auto-detection on boot. When we eventually start to support hot-plugging network adapter in the future, it will be even more important to propagate errors instead of swallowing them. Importantly, before this patch, some errors were "handled" by panicking the kernel. This is no longer the case. 7 FIXMEs were killed in the making of this commit. :^)
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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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 <AK/OwnPtr.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/Bus/PCI/Device.h>
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#include <Kernel/IOWindow.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Net/NetworkAdapter.h>
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#include <Kernel/Random.h>
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namespace Kernel {
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class NE2000NetworkAdapter final : public NetworkAdapter
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, public PCI::Device
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, public IRQHandler {
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public:
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static ErrorOr<LockRefPtr<NE2000NetworkAdapter>> try_to_initialize(PCI::DeviceIdentifier const&);
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virtual ~NE2000NetworkAdapter() override;
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virtual void send_raw(ReadonlyBytes) override;
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virtual bool link_up() override
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{
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// Pure NE2000 doesn't seem to have a link status indicator, so
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// just assume that it's up.
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return true;
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}
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virtual i32 link_speed() override
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{
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// Can only do 10mbit..
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return 10;
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}
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virtual bool link_full_duplex() override { return true; }
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virtual StringView purpose() const override { return class_name(); }
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private:
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NE2000NetworkAdapter(PCI::Address, u8, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString>);
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virtual bool handle_irq(RegisterState const&) override;
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virtual StringView class_name() const override { return "NE2000NetworkAdapter"sv; }
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int ram_test();
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void reset();
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void rdma_read(size_t address, Bytes payload);
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void rdma_write(size_t address, ReadonlyBytes payload);
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void receive();
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void out8(u16 address, u8 data);
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void out16(u16 address, u16 data);
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u8 in8(u16 address);
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u16 in16(u16 address);
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NonnullOwnPtr<IOWindow> m_registers_io_window;
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int m_ring_read_ptr;
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u8 m_interrupt_line { 0 };
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MACAddress m_mac_address;
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EntropySource m_entropy_source;
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WaitQueue m_wait_queue;
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};
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}
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