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https://github.com/LadybirdBrowser/ladybird.git
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64aaf263a2
This change allows the Kernel to actually construct other interfaces besides the E1000 type. This solves a breakage that was introduced recently because of move semantics. A couple of points on this patch: 1. In current situation, we can waste time to create a KString and throw it for nothing. This patch ensures we only create it near construction point so we know we actually need it. 2. It's very likely to assume that non-x86 machines will expose network device with a device tree (or with ACPI). The raspberry pi machine is a good example of that. Therefore, each driver should explicitly ask the correct interface name generation method, and this patch simplifies this pattern greatly, especially in a case where the same network device can appear as a PCI device or as device in another bus type on the same platform target. For example, the (in)famous ne2000 device can be used either as a PCI device or as an ISA device, depending on the model. 3. In my opinion, it seems much more readable to construct the name near calling point of the object constructor than to just pass it with move semantics.
101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/Arch/x86/IO.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/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 E1000NetworkAdapter : 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 RefPtr<E1000NetworkAdapter> try_to_initialize(PCI::DeviceIdentifier const&);
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virtual bool initialize();
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virtual ~E1000NetworkAdapter() override;
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virtual void send_raw(ReadonlyBytes) override;
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virtual bool link_up() override;
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virtual i32 link_speed() override;
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virtual bool link_full_duplex() override;
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virtual StringView purpose() const override { return class_name(); }
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protected:
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void setup_interrupts();
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void setup_link();
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E1000NetworkAdapter(PCI::Address, u8 irq, NonnullOwnPtr<KString>);
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virtual bool handle_irq(const RegisterState&) override;
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virtual StringView class_name() const override { return "E1000NetworkAdapter"sv; }
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struct [[gnu::packed]] e1000_rx_desc {
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volatile uint64_t addr { 0 };
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volatile uint16_t length { 0 };
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volatile uint16_t checksum { 0 };
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volatile uint8_t status { 0 };
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volatile uint8_t errors { 0 };
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volatile uint16_t special { 0 };
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};
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struct [[gnu::packed]] e1000_tx_desc {
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volatile uint64_t addr { 0 };
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volatile uint16_t length { 0 };
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volatile uint8_t cso { 0 };
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volatile uint8_t cmd { 0 };
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volatile uint8_t status { 0 };
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volatile uint8_t css { 0 };
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volatile uint16_t special { 0 };
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};
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virtual void detect_eeprom();
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virtual u32 read_eeprom(u8 address);
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void read_mac_address();
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void write_command(u16 address, u32);
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u32 read_command(u16 address);
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void initialize_rx_descriptors();
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void initialize_tx_descriptors();
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void out8(u16 address, u8);
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void out16(u16 address, u16);
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void out32(u16 address, u32);
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u8 in8(u16 address);
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u16 in16(u16 address);
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u32 in32(u16 address);
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void receive();
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static constexpr size_t number_of_rx_descriptors = 32;
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static constexpr size_t number_of_tx_descriptors = 8;
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IOAddress m_io_base;
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VirtualAddress m_mmio_base;
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OwnPtr<Memory::Region> m_rx_descriptors_region;
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OwnPtr<Memory::Region> m_tx_descriptors_region;
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OwnPtr<Memory::Region> m_rx_buffer_region;
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OwnPtr<Memory::Region> m_tx_buffer_region;
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Array<void*, number_of_rx_descriptors> m_rx_buffers;
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Array<void*, number_of_tx_descriptors> m_tx_buffers;
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OwnPtr<Memory::Region> m_mmio_region;
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bool m_has_eeprom { false };
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bool m_use_mmio { false };
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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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