Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
616
drivers/net/sonic.c
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616
drivers/net/sonic.c
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@@ -0,0 +1,616 @@
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/*
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* sonic.c
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*
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* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*
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* This driver is based on work from Andreas Busse, but most of
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* the code is rewritten.
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*
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* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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*
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* Core code included by system sonic drivers
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*/
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/*
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* Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
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* National Semiconductors data sheet for the DP83932B Sonic Ethernet
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* controller, and the files "8390.c" and "skeleton.c" in this directory.
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*/
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/*
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* Open/initialize the SONIC controller.
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*
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* This routine should set everything up anew at each open, even
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* registers that "should" only need to be set once at boot, so that
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* there is non-reboot way to recover if something goes wrong.
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*/
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static int sonic_open(struct net_device *dev)
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{
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if (sonic_debug > 2)
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printk("sonic_open: initializing sonic driver.\n");
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/*
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* We don't need to deal with auto-irq stuff since we
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* hardwire the sonic interrupt.
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*/
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/*
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* XXX Horrible work around: We install sonic_interrupt as fast interrupt.
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* This means that during execution of the handler interrupt are disabled
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* covering another bug otherwise corrupting data. This doesn't mean
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* this glue works ok under all situations.
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*/
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// if (sonic_request_irq(dev->irq, &sonic_interrupt, 0, "sonic", dev)) {
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if (sonic_request_irq(dev->irq, &sonic_interrupt, SA_INTERRUPT,
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"sonic", dev)) {
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printk("\n%s: unable to get IRQ %d .\n", dev->name, dev->irq);
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return -EAGAIN;
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}
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/*
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* Initialize the SONIC
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*/
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sonic_init(dev);
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netif_start_queue(dev);
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if (sonic_debug > 2)
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printk("sonic_open: Initialization done.\n");
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return 0;
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}
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/*
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* Close the SONIC device
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*/
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static int sonic_close(struct net_device *dev)
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{
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unsigned int base_addr = dev->base_addr;
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if (sonic_debug > 2)
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printk("sonic_close\n");
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netif_stop_queue(dev);
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/*
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* stop the SONIC, disable interrupts
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*/
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SONIC_WRITE(SONIC_ISR, 0x7fff);
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SONIC_WRITE(SONIC_IMR, 0);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
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sonic_free_irq(dev->irq, dev); /* release the IRQ */
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return 0;
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}
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static void sonic_tx_timeout(struct net_device *dev)
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{
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struct sonic_local *lp = (struct sonic_local *) dev->priv;
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printk("%s: transmit timed out.\n", dev->name);
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/* Try to restart the adaptor. */
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sonic_init(dev);
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lp->stats.tx_errors++;
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dev->trans_start = jiffies;
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netif_wake_queue(dev);
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}
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/*
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* transmit packet
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*/
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static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
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{
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struct sonic_local *lp = (struct sonic_local *) dev->priv;
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unsigned int base_addr = dev->base_addr;
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unsigned int laddr;
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int entry, length;
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netif_stop_queue(dev);
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if (sonic_debug > 2)
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printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
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/*
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* Map the packet data into the logical DMA address space
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*/
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if ((laddr = vdma_alloc(CPHYSADDR(skb->data), skb->len)) == ~0UL) {
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printk("%s: no VDMA entry for transmit available.\n",
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dev->name);
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dev_kfree_skb(skb);
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netif_start_queue(dev);
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return 1;
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}
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entry = lp->cur_tx & SONIC_TDS_MASK;
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lp->tx_laddr[entry] = laddr;
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lp->tx_skb[entry] = skb;
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length = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
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flush_cache_all();
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/*
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* Setup the transmit descriptor and issue the transmit command.
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*/
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lp->tda[entry].tx_status = 0; /* clear status */
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lp->tda[entry].tx_frag_count = 1; /* single fragment */
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lp->tda[entry].tx_pktsize = length; /* length of packet */
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lp->tda[entry].tx_frag_ptr_l = laddr & 0xffff;
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lp->tda[entry].tx_frag_ptr_h = laddr >> 16;
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lp->tda[entry].tx_frag_size = length;
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lp->cur_tx++;
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lp->stats.tx_bytes += length;
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if (sonic_debug > 2)
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printk("sonic_send_packet: issueing Tx command\n");
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SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
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dev->trans_start = jiffies;
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if (lp->cur_tx < lp->dirty_tx + SONIC_NUM_TDS)
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netif_start_queue(dev);
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else
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lp->tx_full = 1;
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return 0;
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}
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/*
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* The typical workload of the driver:
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* Handle the network interface interrupts.
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*/
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static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct net_device *dev = (struct net_device *) dev_id;
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unsigned int base_addr = dev->base_addr;
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struct sonic_local *lp;
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int status;
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if (dev == NULL) {
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printk("sonic_interrupt: irq %d for unknown device.\n", irq);
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return IRQ_NONE;
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}
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lp = (struct sonic_local *) dev->priv;
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status = SONIC_READ(SONIC_ISR);
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SONIC_WRITE(SONIC_ISR, 0x7fff); /* clear all bits */
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if (sonic_debug > 2)
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printk("sonic_interrupt: ISR=%x\n", status);
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if (status & SONIC_INT_PKTRX) {
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sonic_rx(dev); /* got packet(s) */
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}
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if (status & SONIC_INT_TXDN) {
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int dirty_tx = lp->dirty_tx;
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while (dirty_tx < lp->cur_tx) {
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int entry = dirty_tx & SONIC_TDS_MASK;
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int status = lp->tda[entry].tx_status;
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if (sonic_debug > 3)
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printk
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("sonic_interrupt: status %d, cur_tx %d, dirty_tx %d\n",
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status, lp->cur_tx, lp->dirty_tx);
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if (status == 0) {
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/* It still hasn't been Txed, kick the sonic again */
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SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
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break;
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}
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/* put back EOL and free descriptor */
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lp->tda[entry].tx_frag_count = 0;
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lp->tda[entry].tx_status = 0;
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if (status & 0x0001)
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lp->stats.tx_packets++;
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else {
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lp->stats.tx_errors++;
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if (status & 0x0642)
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lp->stats.tx_aborted_errors++;
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if (status & 0x0180)
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lp->stats.tx_carrier_errors++;
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if (status & 0x0020)
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lp->stats.tx_window_errors++;
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if (status & 0x0004)
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lp->stats.tx_fifo_errors++;
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}
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/* We must free the original skb */
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if (lp->tx_skb[entry]) {
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dev_kfree_skb_irq(lp->tx_skb[entry]);
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lp->tx_skb[entry] = 0;
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}
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/* and the VDMA address */
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vdma_free(lp->tx_laddr[entry]);
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dirty_tx++;
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}
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if (lp->tx_full
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&& dirty_tx + SONIC_NUM_TDS > lp->cur_tx + 2) {
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/* The ring is no longer full, clear tbusy. */
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lp->tx_full = 0;
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netif_wake_queue(dev);
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}
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lp->dirty_tx = dirty_tx;
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}
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/*
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* check error conditions
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*/
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if (status & SONIC_INT_RFO) {
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printk("%s: receive fifo underrun\n", dev->name);
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lp->stats.rx_fifo_errors++;
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}
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if (status & SONIC_INT_RDE) {
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printk("%s: receive descriptors exhausted\n", dev->name);
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lp->stats.rx_dropped++;
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}
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if (status & SONIC_INT_RBE) {
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printk("%s: receive buffer exhausted\n", dev->name);
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lp->stats.rx_dropped++;
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}
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if (status & SONIC_INT_RBAE) {
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printk("%s: receive buffer area exhausted\n", dev->name);
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lp->stats.rx_dropped++;
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}
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/* counter overruns; all counters are 16bit wide */
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if (status & SONIC_INT_FAE)
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lp->stats.rx_frame_errors += 65536;
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if (status & SONIC_INT_CRC)
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lp->stats.rx_crc_errors += 65536;
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if (status & SONIC_INT_MP)
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lp->stats.rx_missed_errors += 65536;
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/* transmit error */
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if (status & SONIC_INT_TXER)
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lp->stats.tx_errors++;
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/*
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* clear interrupt bits and return
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*/
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SONIC_WRITE(SONIC_ISR, status);
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return IRQ_HANDLED;
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}
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/*
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* We have a good packet(s), get it/them out of the buffers.
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*/
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static void sonic_rx(struct net_device *dev)
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{
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unsigned int base_addr = dev->base_addr;
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struct sonic_local *lp = (struct sonic_local *) dev->priv;
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sonic_rd_t *rd = &lp->rda[lp->cur_rx & SONIC_RDS_MASK];
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int status;
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while (rd->in_use == 0) {
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struct sk_buff *skb;
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int pkt_len;
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unsigned char *pkt_ptr;
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status = rd->rx_status;
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if (sonic_debug > 3)
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printk("status %x, cur_rx %d, cur_rra %x\n",
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status, lp->cur_rx, lp->cur_rra);
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if (status & SONIC_RCR_PRX) {
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pkt_len = rd->rx_pktlen;
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pkt_ptr =
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(char *)
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sonic_chiptomem((rd->rx_pktptr_h << 16) +
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rd->rx_pktptr_l);
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if (sonic_debug > 3)
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printk
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("pktptr %p (rba %p) h:%x l:%x, bsize h:%x l:%x\n",
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pkt_ptr, lp->rba, rd->rx_pktptr_h,
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rd->rx_pktptr_l,
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SONIC_READ(SONIC_RBWC1),
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SONIC_READ(SONIC_RBWC0));
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/* Malloc up new buffer. */
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skb = dev_alloc_skb(pkt_len + 2);
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if (skb == NULL) {
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printk
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("%s: Memory squeeze, dropping packet.\n",
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dev->name);
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lp->stats.rx_dropped++;
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break;
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}
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skb->dev = dev;
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skb_reserve(skb, 2); /* 16 byte align */
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skb_put(skb, pkt_len); /* Make room */
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eth_copy_and_sum(skb, pkt_ptr, pkt_len, 0);
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skb->protocol = eth_type_trans(skb, dev);
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netif_rx(skb); /* pass the packet to upper layers */
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dev->last_rx = jiffies;
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lp->stats.rx_packets++;
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lp->stats.rx_bytes += pkt_len;
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} else {
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/* This should only happen, if we enable accepting broken packets. */
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lp->stats.rx_errors++;
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if (status & SONIC_RCR_FAER)
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lp->stats.rx_frame_errors++;
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if (status & SONIC_RCR_CRCR)
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lp->stats.rx_crc_errors++;
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}
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rd->in_use = 1;
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rd = &lp->rda[(++lp->cur_rx) & SONIC_RDS_MASK];
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/* now give back the buffer to the receive buffer area */
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if (status & SONIC_RCR_LPKT) {
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/*
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* this was the last packet out of the current receice buffer
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* give the buffer back to the SONIC
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*/
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lp->cur_rra += sizeof(sonic_rr_t);
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if (lp->cur_rra >
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(lp->rra_laddr +
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(SONIC_NUM_RRS -
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1) * sizeof(sonic_rr_t))) lp->cur_rra =
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lp->rra_laddr;
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SONIC_WRITE(SONIC_RWP, lp->cur_rra & 0xffff);
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} else
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printk
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("%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
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dev->name);
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}
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/*
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* If any worth-while packets have been received, dev_rint()
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* has done a mark_bh(NET_BH) for us and will work on them
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* when we get to the bottom-half routine.
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*/
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}
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/*
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* Get the current statistics.
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* This may be called with the device open or closed.
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*/
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static struct net_device_stats *sonic_get_stats(struct net_device *dev)
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{
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struct sonic_local *lp = (struct sonic_local *) dev->priv;
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unsigned int base_addr = dev->base_addr;
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/* read the tally counter from the SONIC and reset them */
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lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
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SONIC_WRITE(SONIC_CRCT, 0xffff);
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lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
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SONIC_WRITE(SONIC_FAET, 0xffff);
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lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
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SONIC_WRITE(SONIC_MPT, 0xffff);
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return &lp->stats;
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}
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/*
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* Set or clear the multicast filter for this adaptor.
|
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*/
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static void sonic_multicast_list(struct net_device *dev)
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{
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struct sonic_local *lp = (struct sonic_local *) dev->priv;
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unsigned int base_addr = dev->base_addr;
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unsigned int rcr;
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struct dev_mc_list *dmi = dev->mc_list;
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unsigned char *addr;
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int i;
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rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
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rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
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if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
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rcr |= SONIC_RCR_PRO;
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} else {
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if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) {
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rcr |= SONIC_RCR_AMC;
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} else {
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if (sonic_debug > 2)
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printk
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("sonic_multicast_list: mc_count %d\n",
|
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dev->mc_count);
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lp->cda.cam_enable = 1; /* always enable our own address */
|
||||
for (i = 1; i <= dev->mc_count; i++) {
|
||||
addr = dmi->dmi_addr;
|
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dmi = dmi->next;
|
||||
lp->cda.cam_desc[i].cam_cap0 =
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addr[1] << 8 | addr[0];
|
||||
lp->cda.cam_desc[i].cam_cap1 =
|
||||
addr[3] << 8 | addr[2];
|
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lp->cda.cam_desc[i].cam_cap2 =
|
||||
addr[5] << 8 | addr[4];
|
||||
lp->cda.cam_enable |= (1 << i);
|
||||
}
|
||||
SONIC_WRITE(SONIC_CDC, 16);
|
||||
/* issue Load CAM command */
|
||||
SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
|
||||
}
|
||||
}
|
||||
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||||
if (sonic_debug > 2)
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printk("sonic_multicast_list: setting RCR=%x\n", rcr);
|
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SONIC_WRITE(SONIC_RCR, rcr);
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||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Initialize the SONIC ethernet controller.
|
||||
*/
|
||||
static int sonic_init(struct net_device *dev)
|
||||
{
|
||||
unsigned int base_addr = dev->base_addr;
|
||||
unsigned int cmd;
|
||||
struct sonic_local *lp = (struct sonic_local *) dev->priv;
|
||||
unsigned int rra_start;
|
||||
unsigned int rra_end;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* put the Sonic into software-reset mode and
|
||||
* disable all interrupts
|
||||
*/
|
||||
SONIC_WRITE(SONIC_ISR, 0x7fff);
|
||||
SONIC_WRITE(SONIC_IMR, 0);
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
|
||||
|
||||
/*
|
||||
* clear software reset flag, disable receiver, clear and
|
||||
* enable interrupts, then completely initialize the SONIC
|
||||
*/
|
||||
SONIC_WRITE(SONIC_CMD, 0);
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
|
||||
|
||||
/*
|
||||
* initialize the receive resource area
|
||||
*/
|
||||
if (sonic_debug > 2)
|
||||
printk("sonic_init: initialize receive resource area\n");
|
||||
|
||||
rra_start = lp->rra_laddr & 0xffff;
|
||||
rra_end =
|
||||
(rra_start + (SONIC_NUM_RRS * sizeof(sonic_rr_t))) & 0xffff;
|
||||
|
||||
for (i = 0; i < SONIC_NUM_RRS; i++) {
|
||||
lp->rra[i].rx_bufadr_l =
|
||||
(lp->rba_laddr + i * SONIC_RBSIZE) & 0xffff;
|
||||
lp->rra[i].rx_bufadr_h =
|
||||
(lp->rba_laddr + i * SONIC_RBSIZE) >> 16;
|
||||
lp->rra[i].rx_bufsize_l = SONIC_RBSIZE >> 1;
|
||||
lp->rra[i].rx_bufsize_h = 0;
|
||||
}
|
||||
|
||||
/* initialize all RRA registers */
|
||||
SONIC_WRITE(SONIC_RSA, rra_start);
|
||||
SONIC_WRITE(SONIC_REA, rra_end);
|
||||
SONIC_WRITE(SONIC_RRP, rra_start);
|
||||
SONIC_WRITE(SONIC_RWP, rra_end);
|
||||
SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
|
||||
SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE - 2) >> 1);
|
||||
|
||||
lp->cur_rra =
|
||||
lp->rra_laddr + (SONIC_NUM_RRS - 1) * sizeof(sonic_rr_t);
|
||||
|
||||
/* load the resource pointers */
|
||||
if (sonic_debug > 3)
|
||||
printk("sonic_init: issueing RRRA command\n");
|
||||
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
|
||||
i = 0;
|
||||
while (i++ < 100) {
|
||||
if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
|
||||
break;
|
||||
}
|
||||
|
||||
if (sonic_debug > 2)
|
||||
printk("sonic_init: status=%x\n", SONIC_READ(SONIC_CMD));
|
||||
|
||||
/*
|
||||
* Initialize the receive descriptors so that they
|
||||
* become a circular linked list, ie. let the last
|
||||
* descriptor point to the first again.
|
||||
*/
|
||||
if (sonic_debug > 2)
|
||||
printk("sonic_init: initialize receive descriptors\n");
|
||||
for (i = 0; i < SONIC_NUM_RDS; i++) {
|
||||
lp->rda[i].rx_status = 0;
|
||||
lp->rda[i].rx_pktlen = 0;
|
||||
lp->rda[i].rx_pktptr_l = 0;
|
||||
lp->rda[i].rx_pktptr_h = 0;
|
||||
lp->rda[i].rx_seqno = 0;
|
||||
lp->rda[i].in_use = 1;
|
||||
lp->rda[i].link =
|
||||
lp->rda_laddr + (i + 1) * sizeof(sonic_rd_t);
|
||||
}
|
||||
/* fix last descriptor */
|
||||
lp->rda[SONIC_NUM_RDS - 1].link = lp->rda_laddr;
|
||||
lp->cur_rx = 0;
|
||||
SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
|
||||
SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
|
||||
|
||||
/*
|
||||
* initialize transmit descriptors
|
||||
*/
|
||||
if (sonic_debug > 2)
|
||||
printk("sonic_init: initialize transmit descriptors\n");
|
||||
for (i = 0; i < SONIC_NUM_TDS; i++) {
|
||||
lp->tda[i].tx_status = 0;
|
||||
lp->tda[i].tx_config = 0;
|
||||
lp->tda[i].tx_pktsize = 0;
|
||||
lp->tda[i].tx_frag_count = 0;
|
||||
lp->tda[i].link =
|
||||
(lp->tda_laddr +
|
||||
(i + 1) * sizeof(sonic_td_t)) | SONIC_END_OF_LINKS;
|
||||
}
|
||||
lp->tda[SONIC_NUM_TDS - 1].link =
|
||||
(lp->tda_laddr & 0xffff) | SONIC_END_OF_LINKS;
|
||||
|
||||
SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
|
||||
SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
|
||||
lp->cur_tx = lp->dirty_tx = 0;
|
||||
|
||||
/*
|
||||
* put our own address to CAM desc[0]
|
||||
*/
|
||||
lp->cda.cam_desc[0].cam_cap0 =
|
||||
dev->dev_addr[1] << 8 | dev->dev_addr[0];
|
||||
lp->cda.cam_desc[0].cam_cap1 =
|
||||
dev->dev_addr[3] << 8 | dev->dev_addr[2];
|
||||
lp->cda.cam_desc[0].cam_cap2 =
|
||||
dev->dev_addr[5] << 8 | dev->dev_addr[4];
|
||||
lp->cda.cam_enable = 1;
|
||||
|
||||
for (i = 0; i < 16; i++)
|
||||
lp->cda.cam_desc[i].cam_entry_pointer = i;
|
||||
|
||||
/*
|
||||
* initialize CAM registers
|
||||
*/
|
||||
SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
|
||||
SONIC_WRITE(SONIC_CDC, 16);
|
||||
|
||||
/*
|
||||
* load the CAM
|
||||
*/
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
|
||||
|
||||
i = 0;
|
||||
while (i++ < 100) {
|
||||
if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
|
||||
break;
|
||||
}
|
||||
if (sonic_debug > 2) {
|
||||
printk("sonic_init: CMD=%x, ISR=%x\n",
|
||||
SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR));
|
||||
}
|
||||
|
||||
/*
|
||||
* enable receiver, disable loopback
|
||||
* and enable all interrupts
|
||||
*/
|
||||
SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
|
||||
SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
|
||||
SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
|
||||
SONIC_WRITE(SONIC_ISR, 0x7fff);
|
||||
SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
|
||||
|
||||
cmd = SONIC_READ(SONIC_CMD);
|
||||
if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
|
||||
printk("sonic_init: failed, status=%x\n", cmd);
|
||||
|
||||
if (sonic_debug > 2)
|
||||
printk("sonic_init: new status=%x\n",
|
||||
SONIC_READ(SONIC_CMD));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
Reference in New Issue
Block a user