Kernel/Net: Move Intel network adapters code to a separate directory

Kernel/Net/Intel/E1000NetworkAdapter.h

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/OwnPtr.h>
+#include <Kernel/Arch/x86/IO.h>
+#include <Kernel/Bus/PCI/Access.h>
+#include <Kernel/Bus/PCI/Device.h>
+#include <Kernel/Interrupts/IRQHandler.h>
+#include <Kernel/Net/NetworkAdapter.h>
+#include <Kernel/Random.h>
+
+namespace Kernel {
+
+class E1000NetworkAdapter : public NetworkAdapter
+    , public PCI::Device
+    , public IRQHandler {
+public:
+    static RefPtr<E1000NetworkAdapter> try_to_initialize(PCI::DeviceIdentifier const&);
+
+    virtual bool initialize();
+
+    virtual ~E1000NetworkAdapter() override;
+
+    virtual void send_raw(ReadonlyBytes) override;
+    virtual bool link_up() override;
+    virtual i32 link_speed() override;
+    virtual bool link_full_duplex() override;
+
+    virtual StringView purpose() const override { return class_name(); }
+
+protected:
+    void setup_interrupts();
+    void setup_link();
+
+    E1000NetworkAdapter(PCI::Address, u8 irq, NonnullOwnPtr<KString>);
+    virtual bool handle_irq(const RegisterState&) override;
+    virtual StringView class_name() const override { return "E1000NetworkAdapter"sv; }
+
+    struct [[gnu::packed]] e1000_rx_desc {
+        volatile uint64_t addr { 0 };
+        volatile uint16_t length { 0 };
+        volatile uint16_t checksum { 0 };
+        volatile uint8_t status { 0 };
+        volatile uint8_t errors { 0 };
+        volatile uint16_t special { 0 };
+    };
+
+    struct [[gnu::packed]] e1000_tx_desc {
+        volatile uint64_t addr { 0 };
+        volatile uint16_t length { 0 };
+        volatile uint8_t cso { 0 };
+        volatile uint8_t cmd { 0 };
+        volatile uint8_t status { 0 };
+        volatile uint8_t css { 0 };
+        volatile uint16_t special { 0 };
+    };
+
+    virtual void detect_eeprom();
+    virtual u32 read_eeprom(u8 address);
+    void read_mac_address();
+
+    void write_command(u16 address, u32);
+    u32 read_command(u16 address);
+
+    void initialize_rx_descriptors();
+    void initialize_tx_descriptors();
+
+    void out8(u16 address, u8);
+    void out16(u16 address, u16);
+    void out32(u16 address, u32);
+    u8 in8(u16 address);
+    u16 in16(u16 address);
+    u32 in32(u16 address);
+
+    void receive();
+
+    static constexpr size_t number_of_rx_descriptors = 32;
+    static constexpr size_t number_of_tx_descriptors = 8;
+
+    IOAddress m_io_base;
+    VirtualAddress m_mmio_base;
+    OwnPtr<Memory::Region> m_rx_descriptors_region;
+    OwnPtr<Memory::Region> m_tx_descriptors_region;
+    OwnPtr<Memory::Region> m_rx_buffer_region;
+    OwnPtr<Memory::Region> m_tx_buffer_region;
+    Array<void*, number_of_rx_descriptors> m_rx_buffers;
+    Array<void*, number_of_tx_descriptors> m_tx_buffers;
+    OwnPtr<Memory::Region> m_mmio_region;
+    bool m_has_eeprom { false };
+    bool m_use_mmio { false };
+    EntropySource m_entropy_source;
+
+    WaitQueue m_wait_queue;
+};
+}