text: #pragma once
  
  #include <AK/OwnPtr.h>
  #include <Kernel/IRQHandler.h>
  #include <Kernel/Net/NetworkAdapter.h>
  #include <Kernel/PCI.h>
  
  #define RTL8139_TX_BUFFER_COUNT 4
  
  class RTL8139NetworkAdapter final : public NetworkAdapter
      , public IRQHandler {
  public:
      static OwnPtr<RTL8139NetworkAdapter> autodetect();
  
      RTL8139NetworkAdapter(PCI::Address, u8 irq);
      virtual ~RTL8139NetworkAdapter() override;
  
      virtual void send_raw(const u8*, int) override;
      virtual bool link_up() override {
          return m_link_up;
      }
  
  private:
      virtual void handle_irq() override;
      virtual const char* class_name() const override {
          return "RTL8139NetworkAdapter";
      }
  
      void reset();
      void read_mac_address();
  
      void receive();
  
      void out8(u16 address, u8 data);
      void out16(u16 address, u16 data);
      void out32(u16 address, u32 data);
      u8 in8(u16 address);
      u16 in16(u16 address);
      u32 in32(u16 address);
  
      PCI::Address m_pci_address;
      u16 m_io_base { 0 };
      u8 m_interrupt_line { 0 };
      u32 m_rx_buffer_addr { 0 };
      u16 m_rx_buffer_offset { 0 };
      u32 m_tx_buffer_addr[RTL8139_TX_BUFFER_COUNT];
      u8 m_tx_next_buffer { 0 };
      u32 m_packet_buffer { 0 };
      bool m_link_up { false };
  };
  