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Kernel: A bunch of hacking towards initial Ethernet support.

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This commit is contained in:
Andreas Kling 2019-03-10 20:59:23 +01:00
parent 4641ee49b5
commit 97664fad60
8 changed files with 239 additions and 5 deletions
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34
Kernel/E1000NetworkAdapter.h
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@ -8,15 +8,38 @@
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(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();
@ -24,6 +47,9 @@ private:
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);
@ -37,4 +63,12 @@ private:
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;
word m_rx_current { 0 };
word m_tx_current { 0 };
};