text: #pragma once
  
  #include <AK/OwnPtr.h>
  #include <Kernel/DeviceIRQHandler.h>
  #include <Kernel/Net/NetworkAdapter.h>
  #include <Kernel/PCI.h>
  
  class E1000NetworkAdapter final : public NetworkAdapter
      , public DeviceIRQHandler {
  public:
      static OwnPtr<E1000NetworkAdapter> autodetect();
  
      E1000NetworkAdapter(PCI::Address, u8 irq);
      virtual ~E1000NetworkAdapter() override;
  
      virtual void send_raw(const u8*, int) override;
      virtual bool link_up() override;
  
  private:
      virtual void handle_irq() override;
      virtual const char* class_name() const override { return "E1000NetworkAdapter"; }
  
      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 };
      };
  
      void detect_eeprom();
      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();
  
      PCI::Address m_pci_address;
      u16 m_io_base { 0 };
      PhysicalAddress m_mmio_base;
      u8 m_interrupt_line { 0 };
      bool m_has_eeprom { false };
      bool m_use_mmio { false };
  
      static const int number_of_rx_descriptors = 32;
      static const int number_of_tx_descriptors = 8;
  
      e1000_rx_desc* m_rx_descriptors;
      e1000_tx_desc* m_tx_descriptors;
  };
  