Kernel: Move networking related files into Kernel/Net/.

Kernel/Net/E1000NetworkAdapter.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <Kernel/Net/NetworkAdapter.h>
+#include <Kernel/PCI.h>
+#include <Kernel/MemoryManager.h>
+#include <Kernel/IRQHandler.h>
+#include <AK/OwnPtr.h>
+
+class E1000NetworkAdapter final : public NetworkAdapter, public IRQHandler {
+public:
+    static E1000NetworkAdapter* the();
+
+    static OwnPtr<E1000NetworkAdapter> autodetect();
+
+    E1000NetworkAdapter(PCI::Address, byte irq);
+    virtual ~E1000NetworkAdapter() override;
+
+    virtual void send_raw(const byte*, int) 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();
+    dword read_eeprom(byte address);
+    void read_mac_address();
+
+    void write_command(word address, dword);
+    dword read_command(word address);
+
+    void initialize_rx_descriptors();
+    void initialize_tx_descriptors();
+
+    void out8(word address, byte);
+    void out16(word address, word);
+    void out32(word address, dword);
+    byte in8(word address);
+    word in16(word address);
+    dword in32(word address);
+
+    void receive();
+
+    PCI::Address m_pci_address;
+    word m_io_base { 0 };
+    PhysicalAddress m_mmio_base;
+    byte 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;
+};