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c31f28e778
- Eliminate check for irq handler 'dev_id==NULL' where the condition never occurs. - Eliminate needless casts to/from void* Signed-off-by: Jeff Garzik <jeff@garzik.org>
765 lines
22 KiB
C
765 lines
22 KiB
C
/*
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* sonic.c
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*
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* (C) 2005 Finn Thain
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*
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* Converted to DMA API, added zero-copy buffer handling, and
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* (from the mac68k project) introduced dhd's support for 16-bit cards.
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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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* And... partially rewritten again by David Huggins-Daines in order
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* to cope with screwed up Macintosh NICs that may or may not use
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* 16-bit DMA.
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*
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* (C) 1999 David Huggins-Daines <dhd@debian.org>
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*
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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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* Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
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* Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
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* the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
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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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struct sonic_local *lp = netdev_priv(dev);
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int i;
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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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* Note (dhd): this also appears to prevent lockups on the Macintrash
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* when more than one Ethernet card is installed (knock on wood)
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*
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* Note (fthain): whether the above is still true is anyones guess. Certainly
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* the buffer handling algorithms will not tolerate re-entrance without some
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* mutual exclusion added. Anyway, the memcpy has now been eliminated from the
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* rx code to make this a faster "fast interrupt".
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*/
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if (request_irq(dev->irq, &sonic_interrupt, SONIC_IRQ_FLAG, "sonic", dev)) {
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printk(KERN_ERR "\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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for (i = 0; i < SONIC_NUM_RRS; i++) {
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struct sk_buff *skb = dev_alloc_skb(SONIC_RBSIZE + 2);
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if (skb == NULL) {
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while(i > 0) { /* free any that were allocated successfully */
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i--;
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
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dev->name);
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return -ENOMEM;
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}
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skb->dev = dev;
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/* align IP header unless DMA requires otherwise */
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if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
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skb_reserve(skb, 2);
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lp->rx_skb[i] = skb;
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}
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
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SONIC_RBSIZE, DMA_FROM_DEVICE);
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if (!laddr) {
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while(i > 0) { /* free any that were mapped successfully */
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i--;
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dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
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lp->rx_laddr[i] = (dma_addr_t)0;
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}
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
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dev->name);
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return -ENOMEM;
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}
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lp->rx_laddr[i] = laddr;
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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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struct sonic_local *lp = netdev_priv(dev);
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int i;
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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_IMR, 0);
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SONIC_WRITE(SONIC_ISR, 0x7fff);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
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/* unmap and free skbs that haven't been transmitted */
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for (i = 0; i < SONIC_NUM_TDS; i++) {
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if(lp->tx_laddr[i]) {
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dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
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lp->tx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->tx_skb[i]) {
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dev_kfree_skb(lp->tx_skb[i]);
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lp->tx_skb[i] = NULL;
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}
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}
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/* unmap and free the receive buffers */
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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if(lp->rx_laddr[i]) {
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dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
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lp->rx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->rx_skb[i]) {
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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}
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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 = netdev_priv(dev);
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int i;
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/* Stop the interrupts for this */
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SONIC_WRITE(SONIC_IMR, 0);
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/* We could resend the original skbs. Easier to re-initialise. */
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for (i = 0; i < SONIC_NUM_TDS; i++) {
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if(lp->tx_laddr[i]) {
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dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
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lp->tx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->tx_skb[i]) {
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dev_kfree_skb(lp->tx_skb[i]);
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lp->tx_skb[i] = NULL;
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}
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}
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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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* Appends new TD during transmission thus avoiding any TX interrupts
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* until we run out of TDs.
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* This routine interacts closely with the ISR in that it may,
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* set tx_skb[i]
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* reset the status flags of the new TD
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* set and reset EOL flags
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* stop the tx queue
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* The ISR interacts with this routine in various ways. It may,
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* reset tx_skb[i]
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* test the EOL and status flags of the TDs
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* wake the tx queue
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* Concurrently with all of this, the SONIC is potentially writing to
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* the status flags of the TDs.
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* Until some mutual exclusion is added, this code will not work with SMP. However,
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* MIPS Jazz machines and m68k Macs were all uni-processor machines.
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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 = netdev_priv(dev);
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dma_addr_t laddr;
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int length;
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int entry = lp->next_tx;
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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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length = skb->len;
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if (length < ETH_ZLEN) {
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if (skb_padto(skb, ETH_ZLEN))
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return 0;
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length = ETH_ZLEN;
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}
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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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laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
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if (!laddr) {
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printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
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dev_kfree_skb(skb);
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return 1;
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}
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sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */
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sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
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sonic_tda_put(dev, entry, SONIC_TD_LINK,
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sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
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/*
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* Must set tx_skb[entry] only after clearing status, and
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* before clearing EOL and before stopping queue
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*/
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wmb();
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lp->tx_len[entry] = length;
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lp->tx_laddr[entry] = laddr;
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lp->tx_skb[entry] = skb;
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wmb();
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sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
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sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
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lp->eol_tx = entry;
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lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
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if (lp->tx_skb[lp->next_tx] != NULL) {
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/* The ring is full, the ISR has yet to process the next TD. */
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if (sonic_debug > 3)
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printk("%s: stopping queue\n", dev->name);
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netif_stop_queue(dev);
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/* after this packet, wait for ISR to free up some TDAs */
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} else netif_start_queue(dev);
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if (sonic_debug > 2)
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printk("sonic_send_packet: issuing 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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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)
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{
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struct net_device *dev = dev_id;
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struct sonic_local *lp = netdev_priv(dev);
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int status;
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if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
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return IRQ_NONE;
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do {
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if (status & SONIC_INT_PKTRX) {
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if (sonic_debug > 2)
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printk("%s: packet rx\n", dev->name);
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sonic_rx(dev); /* got packet(s) */
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SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
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}
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if (status & SONIC_INT_TXDN) {
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int entry = lp->cur_tx;
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int td_status;
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int freed_some = 0;
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/* At this point, cur_tx is the index of a TD that is one of:
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* unallocated/freed (status set & tx_skb[entry] clear)
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* allocated and sent (status set & tx_skb[entry] set )
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* allocated and not yet sent (status clear & tx_skb[entry] set )
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* still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
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*/
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if (sonic_debug > 2)
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printk("%s: tx done\n", dev->name);
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while (lp->tx_skb[entry] != NULL) {
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if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
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break;
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if (td_status & 0x0001) {
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lp->stats.tx_packets++;
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lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
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} else {
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lp->stats.tx_errors++;
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if (td_status & 0x0642)
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lp->stats.tx_aborted_errors++;
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if (td_status & 0x0180)
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lp->stats.tx_carrier_errors++;
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if (td_status & 0x0020)
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lp->stats.tx_window_errors++;
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if (td_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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dev_kfree_skb_irq(lp->tx_skb[entry]);
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lp->tx_skb[entry] = NULL;
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/* and unmap DMA buffer */
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dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
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lp->tx_laddr[entry] = (dma_addr_t)0;
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freed_some = 1;
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if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
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entry = (entry + 1) & SONIC_TDS_MASK;
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break;
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}
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entry = (entry + 1) & SONIC_TDS_MASK;
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}
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if (freed_some || lp->tx_skb[entry] == NULL)
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netif_wake_queue(dev); /* The ring is no longer full */
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lp->cur_tx = entry;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
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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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if (sonic_debug > 1)
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printk("%s: rx fifo overrun\n", dev->name);
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lp->stats.rx_fifo_errors++;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
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}
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if (status & SONIC_INT_RDE) {
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if (sonic_debug > 1)
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printk("%s: rx descriptors exhausted\n", dev->name);
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lp->stats.rx_dropped++;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
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}
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if (status & SONIC_INT_RBAE) {
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if (sonic_debug > 1)
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printk("%s: rx buffer area exceeded\n", dev->name);
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lp->stats.rx_dropped++;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
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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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SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
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}
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if (status & SONIC_INT_CRC) {
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lp->stats.rx_crc_errors += 65536;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
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}
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if (status & SONIC_INT_MP) {
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lp->stats.rx_missed_errors += 65536;
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SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
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}
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/* transmit error */
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if (status & SONIC_INT_TXER) {
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if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2))
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printk(KERN_ERR "%s: tx fifo underrun\n", dev->name);
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SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
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}
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/* bus retry */
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if (status & SONIC_INT_BR) {
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printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
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dev->name);
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/* ... to help debug DMA problems causing endless interrupts. */
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/* Bounce the eth interface to turn on the interrupt again. */
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SONIC_WRITE(SONIC_IMR, 0);
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SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
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}
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/* load CAM done */
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if (status & SONIC_INT_LCD)
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SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
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} while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT));
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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), pass it/them up the network stack.
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*/
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static void sonic_rx(struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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int status;
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int entry = lp->cur_rx;
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while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
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struct sk_buff *used_skb;
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struct sk_buff *new_skb;
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dma_addr_t new_laddr;
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u16 bufadr_l;
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u16 bufadr_h;
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int pkt_len;
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status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
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if (status & SONIC_RCR_PRX) {
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/* Malloc up new buffer. */
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new_skb = dev_alloc_skb(SONIC_RBSIZE + 2);
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if (new_skb == NULL) {
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printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
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lp->stats.rx_dropped++;
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break;
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}
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new_skb->dev = dev;
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/* provide 16 byte IP header alignment unless DMA requires otherwise */
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if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
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skb_reserve(new_skb, 2);
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new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
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SONIC_RBSIZE, DMA_FROM_DEVICE);
|
|
if (!new_laddr) {
|
|
dev_kfree_skb(new_skb);
|
|
printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
|
|
lp->stats.rx_dropped++;
|
|
break;
|
|
}
|
|
|
|
/* now we have a new skb to replace it, pass the used one up the stack */
|
|
dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
|
|
used_skb = lp->rx_skb[entry];
|
|
pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
|
|
skb_trim(used_skb, pkt_len);
|
|
used_skb->protocol = eth_type_trans(used_skb, dev);
|
|
netif_rx(used_skb);
|
|
dev->last_rx = jiffies;
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes += pkt_len;
|
|
|
|
/* and insert the new skb */
|
|
lp->rx_laddr[entry] = new_laddr;
|
|
lp->rx_skb[entry] = new_skb;
|
|
|
|
bufadr_l = (unsigned long)new_laddr & 0xffff;
|
|
bufadr_h = (unsigned long)new_laddr >> 16;
|
|
sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l);
|
|
sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h);
|
|
} else {
|
|
/* This should only happen, if we enable accepting broken packets. */
|
|
lp->stats.rx_errors++;
|
|
if (status & SONIC_RCR_FAER)
|
|
lp->stats.rx_frame_errors++;
|
|
if (status & SONIC_RCR_CRCR)
|
|
lp->stats.rx_crc_errors++;
|
|
}
|
|
if (status & SONIC_RCR_LPKT) {
|
|
/*
|
|
* this was the last packet out of the current receive buffer
|
|
* give the buffer back to the SONIC
|
|
*/
|
|
lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
|
|
if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
|
|
SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
|
|
if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
|
|
if (sonic_debug > 2)
|
|
printk("%s: rx buffer exhausted\n", dev->name);
|
|
SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
|
|
}
|
|
} else
|
|
printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
|
|
dev->name);
|
|
/*
|
|
* give back the descriptor
|
|
*/
|
|
sonic_rda_put(dev, entry, SONIC_RD_LINK,
|
|
sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
|
|
sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
|
|
sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
|
|
sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
|
|
lp->eol_rx = entry;
|
|
lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
|
|
}
|
|
/*
|
|
* If any worth-while packets have been received, netif_rx()
|
|
* has done a mark_bh(NET_BH) for us and will work on them
|
|
* when we get to the bottom-half routine.
|
|
*/
|
|
}
|
|
|
|
|
|
/*
|
|
* Get the current statistics.
|
|
* This may be called with the device open or closed.
|
|
*/
|
|
static struct net_device_stats *sonic_get_stats(struct net_device *dev)
|
|
{
|
|
struct sonic_local *lp = netdev_priv(dev);
|
|
|
|
/* read the tally counter from the SONIC and reset them */
|
|
lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
|
|
SONIC_WRITE(SONIC_CRCT, 0xffff);
|
|
lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
|
|
SONIC_WRITE(SONIC_FAET, 0xffff);
|
|
lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
|
|
SONIC_WRITE(SONIC_MPT, 0xffff);
|
|
|
|
return &lp->stats;
|
|
}
|
|
|
|
|
|
/*
|
|
* Set or clear the multicast filter for this adaptor.
|
|
*/
|
|
static void sonic_multicast_list(struct net_device *dev)
|
|
{
|
|
struct sonic_local *lp = netdev_priv(dev);
|
|
unsigned int rcr;
|
|
struct dev_mc_list *dmi = dev->mc_list;
|
|
unsigned char *addr;
|
|
int i;
|
|
|
|
rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
|
|
rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
|
|
|
|
if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
|
|
rcr |= SONIC_RCR_PRO;
|
|
} else {
|
|
if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) {
|
|
rcr |= SONIC_RCR_AMC;
|
|
} else {
|
|
if (sonic_debug > 2)
|
|
printk("sonic_multicast_list: mc_count %d\n", dev->mc_count);
|
|
sonic_set_cam_enable(dev, 1); /* always enable our own address */
|
|
for (i = 1; i <= dev->mc_count; i++) {
|
|
addr = dmi->dmi_addr;
|
|
dmi = dmi->next;
|
|
sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
|
|
sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
|
|
sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
|
|
sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (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);
|
|
}
|
|
}
|
|
|
|
if (sonic_debug > 2)
|
|
printk("sonic_multicast_list: setting RCR=%x\n", rcr);
|
|
|
|
SONIC_WRITE(SONIC_RCR, rcr);
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize the SONIC ethernet controller.
|
|
*/
|
|
static int sonic_init(struct net_device *dev)
|
|
{
|
|
unsigned int cmd;
|
|
struct sonic_local *lp = netdev_priv(dev);
|
|
int i;
|
|
|
|
/*
|
|
* put the Sonic into software-reset mode and
|
|
* disable all interrupts
|
|
*/
|
|
SONIC_WRITE(SONIC_IMR, 0);
|
|
SONIC_WRITE(SONIC_ISR, 0x7fff);
|
|
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");
|
|
|
|
for (i = 0; i < SONIC_NUM_RRS; i++) {
|
|
u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
|
|
u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
|
|
sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
|
|
sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
|
|
sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
|
|
sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
|
|
}
|
|
|
|
/* initialize all RRA registers */
|
|
lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
|
|
SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
|
|
lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
|
|
SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
|
|
|
|
SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
|
|
SONIC_WRITE(SONIC_REA, lp->rra_end);
|
|
SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
|
|
SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
|
|
SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
|
|
SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
|
|
|
|
/* load the resource pointers */
|
|
if (sonic_debug > 3)
|
|
printk("sonic_init: issuing 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 i=%d\n", SONIC_READ(SONIC_CMD), i);
|
|
|
|
/*
|
|
* 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++) {
|
|
sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
|
|
sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
|
|
sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
|
|
sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
|
|
sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
|
|
sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
|
|
sonic_rda_put(dev, i, SONIC_RD_LINK,
|
|
lp->rda_laddr +
|
|
((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
|
|
}
|
|
/* fix last descriptor */
|
|
sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
|
|
(lp->rda_laddr & 0xffff) | SONIC_EOL);
|
|
lp->eol_rx = SONIC_NUM_RDS - 1;
|
|
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++) {
|
|
sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
|
|
sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
|
|
sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
|
|
sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
|
|
sonic_tda_put(dev, i, SONIC_TD_LINK,
|
|
(lp->tda_laddr & 0xffff) +
|
|
(i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
|
|
lp->tx_skb[i] = NULL;
|
|
}
|
|
/* fix last descriptor */
|
|
sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
|
|
(lp->tda_laddr & 0xffff));
|
|
|
|
SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
|
|
SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
|
|
lp->cur_tx = lp->next_tx = 0;
|
|
lp->eol_tx = SONIC_NUM_TDS - 1;
|
|
|
|
/*
|
|
* put our own address to CAM desc[0]
|
|
*/
|
|
sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
|
|
sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
|
|
sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
|
|
sonic_set_cam_enable(dev, 1);
|
|
|
|
for (i = 0; i < 16; i++)
|
|
sonic_cda_put(dev, i, SONIC_CD_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, i=%d",
|
|
SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
|
|
}
|
|
|
|
/*
|
|
* 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(KERN_ERR "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");
|