diff options
Diffstat (limited to 'kernel/drivers/net.c')
| -rw-r--r-- | kernel/drivers/net.c | 122 |
1 files changed, 102 insertions, 20 deletions
diff --git a/kernel/drivers/net.c b/kernel/drivers/net.c index 284b749..cd1a331 100644 --- a/kernel/drivers/net.c +++ b/kernel/drivers/net.c @@ -10,6 +10,69 @@ #include <pci.h> #include <print.h> +u16 flip_short(u16 short_int) +{ + u32 first_byte = *((u8 *)(&short_int)); + u32 second_byte = *((u8 *)(&short_int) + 1); + return (first_byte << 8) | (second_byte); +} + +u32 flip_long(u32 long_int) +{ + u32 first_byte = *((u8 *)(&long_int)); + u32 second_byte = *((u8 *)(&long_int) + 1); + u32 third_byte = *((u8 *)(&long_int) + 2); + u32 fourth_byte = *((u8 *)(&long_int) + 3); + return (first_byte << 24) | (second_byte << 16) | (third_byte << 8) | (fourth_byte); +} + +u8 flip_byte(u8 byte, int num_bits) +{ + u8 t = byte << (8 - num_bits); + return t | (byte >> num_bits); +} + +u8 htonb(u8 byte, int num_bits) +{ + return flip_byte(byte, num_bits); +} + +u8 ntohb(u8 byte, int num_bits) +{ + return flip_byte(byte, 8 - num_bits); +} + +u16 htons(u16 hostshort) +{ + return flip_short(hostshort); +} + +u32 htonl(u32 hostlong) +{ + return flip_long(hostlong); +} + +u16 ntohs(u16 netshort) +{ + return flip_short(netshort); +} + +u32 ntohl(u32 netlong) +{ + return flip_long(netlong); +} + +void ethernet_handle_packet(struct ethernet_packet *packet) +{ + /* void *data = packet + sizeof(*packet); */ + if (ntohs(packet->type) == ETHERNET_TYPE_ARP) + print("ARP PACKET\n"); + else if (ntohs(packet->type) == ETHERNET_TYPE_IP) + print("IP PACKET\n"); + else + printf("UNKNOWN PACKET %d\n", ntohs(packet->type)); +} + static int rtl_irq = 0; static u8 mac[6]; static u8 *last_packet = NULL; @@ -28,13 +91,13 @@ void rtl8139_find(u32 device, u16 vendor_id, u16 device_id, void *extra) void rtl8139_irq_handler() { print("RTL INT!\n"); - u16 status = inw(rtl_iobase + 0x3E); + u16 status = inw(rtl_iobase + RTL_PORT_ISR); if (!status) return; - outw(rtl_iobase + 0x3E, status); + outw(rtl_iobase + RTL_PORT_ISR, status); if (status & 0x01 || status & 0x02) { - while ((inb(rtl_iobase + 0x37) & 0x01) == 0) { + while ((inb(rtl_iobase + RTL_PORT_CMD) & 0x01) == 0) { print("RECEIVE\n"); int offset = cur_rx % 0x2000; @@ -60,11 +123,11 @@ void rtl8139_irq_handler() memcpy(last_packet, buf_8, rx_size); } - /* rtl_enqueue(last_packet); */ + ethernet_handle_packet((struct ethernet_packet *)last_packet); } cur_rx = (cur_rx + rx_size + 4 + 3) & ~3; - outw(rtl_iobase + 0x3A, cur_rx - 16); + outw(rtl_iobase + RTL_PORT_RXPTR, cur_rx - 16); } } } @@ -84,6 +147,7 @@ void rtl8139_init() irq_install_handler(rtl_irq, rtl8139_irq_handler); u32 rtl_bar0 = pci_read_field(rtl_device_pci, PCI_BAR0, 4); + /* u32 rtl_bar1 = pci_read_field(rtl_device_pci, PCI_BAR1, 4); */ rtl_iobase = 0; if (rtl_bar0 & 0x00000001) @@ -91,30 +155,48 @@ void rtl8139_init() // Get mac address for (int i = 0; i < 6; ++i) - mac[i] = inb((u16)(rtl_iobase + 0x00 + i)); + mac[i] = inb(rtl_iobase + RTL_PORT_MAC + i); printf("Mac address: %x:%x:%x:%x:%x:%x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); // Activate - outb((u16)(rtl_iobase + 0x52), 0x0); + outb(rtl_iobase + RTL_PORT_CONFIG, 0x0); // Reset - outb((u16)(rtl_iobase + 0x37), 0x10); - while ((inb((u16)(rtl_iobase + 0x37)) & 0x10) != 0) + outb((u16)(rtl_iobase + RTL_PORT_CMD), 0x10); + while ((inb(rtl_iobase + RTL_PORT_CMD) & 0x10) != 0) ; // Set receive buffer rtl_rx_buffer = (u8 *)malloc(0x3000); - memset(rtl_rx_buffer, 0x00, 0x3000); - outl((u16)(rtl_iobase + 0x30), (u32)rtl_rx_buffer); - - // Enable ISR - outw((u16)(rtl_iobase + 0x3C), 0x0005); - - // Accept packets - outl((u16)(rtl_iobase + 0x44), 0xf | (1 << 7)); - - // Enable receive and transmitter - outb((u16)(rtl_iobase + 0x37), 0x0C); + memset(rtl_rx_buffer, 0, 0x3000); + outl(rtl_iobase + RTL_PORT_RBSTART, (u32)rtl_rx_buffer); + + // Enable IRQs + outw(rtl_iobase + RTL_PORT_IMR, 0x8000 | /* PCI error */ + 0x4000 | /* PCS timeout */ + 0x40 | /* Rx FIFO over */ + 0x20 | /* Rx underrun */ + 0x10 | /* Rx overflow */ + 0x08 | /* Tx error */ + 0x04 | /* Tx okay */ + 0x02 | /* Rx error */ + 0x01 /* Rx okay */ + ); + + // Configure transmit + outl(rtl_iobase + RTL_PORT_TCR, 0); + + // Configure receive + outl(rtl_iobase + RTL_PORT_RCR, (0) | /* 8K receive */ + 0x08 | /* broadcast */ + 0x01 /* all physical */ + ); + + // Enable receive and transmit + outb(rtl_iobase + RTL_PORT_CMD, 0x08 | 0x04); + + // Reset rx statistics + outl(rtl_iobase + RTL_PORT_RXMISS, 0); } void net_install() |