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ARMLINUX hzlc : , , ,

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: /include/linux/netdevice.h : int dev_queue_xmit(struct sk_buff *skb); intnetif_rx(struct sk_buff *skb); Sk_buff

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Sk_buff /linux/skbuff.h , Linux , ,

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Linux

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net_device net_device

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& Net_device

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, , , , Cirrus CS8900 . /drivers/net/cs89x0.c cs8900 datasheet :http://cst.mi.fu- berlin.de/proje... eets/old/CS8900.pdfhttp://cst.mi.fu- berlin.de/proje... eets/old/CS8900.pdf

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/include/linux/netdevice.h API : Int register_netdev(struct net_device *dev) Void unregister_netdev(struct net_device *dev) net_device

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net_device init() , net_device .init() cs89x0_probe() : struct net_device * __init cs89x0_probe(int unit)

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(2) for (port = netcard_portlist; *port; port++) { /*netcard_portlist unsigned int cs89x0.c , cs8900 cs89x0_probe1 */ if (cs89x0_probe1(dev, *port, 0) == 0) /* , , cs8900 */

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(3) static int __init cs89x0_probe1(struct net_device *dev, int ioaddr, int modular) 1. 2. 3. net_device

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/include/linux/netdevice.h void netif_start_queue(struct net_device *dev) I/O DMA void netif_stop_queue(struct net_device *dev)

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TX_CMD TX_LENG PacketPage PP_BusST , 8 READY_FOR_TX_NOW, . CAUTION!! spin_lock_irq(&lp- >lock)

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cs8900 , , , , netif_rx() . irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs)

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2 /* */ while ((status = readword(dev, ISQ_PORT))) { if (net_debug > 4)printk(%s: event=%04x\n, dev->name, status); handled = 1; switch(status & ISQ_EVENT_MASK) { case ISQ_RECEIVER_EVENT: /* */ net_rx(dev); /* , net_rx() */ break;

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3 Void net_rx(struct net_device *dev) 1. 2. 3. 4. 5. lp->stats.rx_packets++; lp->stats.rx_bytes += length;

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, . net_device , . sk_buff, .

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