- disable_irq(dev->irq);
- ei_interrupt(dev->irq, dev, NULL);
- enable_irq(dev->irq);
-}
-#endif
-
-/**
- * ei_tx_err - handle transmitter error
- * @dev: network device which threw the exception
- *
- * A transmitter error has happened. Most likely excess collisions (which
- * is a fairly normal condition). If the error is one where the Tx will
- * have been aborted, we try and send another one right away, instead of
- * letting the failed packet sit and collect dust in the Tx buffer. This
- * is a much better solution as it avoids kernel based Tx timeouts, and
- * an unnecessary card reset.
- *
- * Called with lock held.
- */
-
-static void ei_tx_err(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned char txsr = inb_p(e8390_base+EN0_TSR);
- unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
-
-#ifdef VERBOSE_ERROR_DUMP
- printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
- if (txsr & ENTSR_ABT)
- printk("excess-collisions ");
- if (txsr & ENTSR_ND)
- printk("non-deferral ");
- if (txsr & ENTSR_CRS)
- printk("lost-carrier ");
- if (txsr & ENTSR_FU)
- printk("FIFO-underrun ");
- if (txsr & ENTSR_CDH)
- printk("lost-heartbeat ");
- printk("\n");
-#endif
-
- outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
-
- if (tx_was_aborted)
- ei_tx_intr(dev);
- else
- {
- ei_local->stat.tx_errors++;
- if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
- if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
- if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
- }
-}
-
-/**
- * ei_tx_intr - transmit interrupt handler
- * @dev: network device for which tx intr is handled
- *
- * We have finished a transmit: check for errors and then trigger the next
- * packet to be sent. Called with lock held.
- */
-
-static void ei_tx_intr(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- int status = inb(e8390_base + EN0_TSR);
-
- outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
-
- /*
- * There are two Tx buffers, see which one finished, and trigger
- * the send of another one if it exists.
- */
- ei_local->txqueue--;
-
- if (ei_local->tx1 < 0)
- {
- if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
- printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
- ei_local->name, ei_local->lasttx, ei_local->tx1);
- ei_local->tx1 = 0;
- if (ei_local->tx2 > 0)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
- dev->trans_start = jiffies;
- ei_local->tx2 = -1,
- ei_local->lasttx = 2;
- }
- else ei_local->lasttx = 20, ei_local->txing = 0;
- }
- else if (ei_local->tx2 < 0)
- {
- if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
- printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
- ei_local->name, ei_local->lasttx, ei_local->tx2);
- ei_local->tx2 = 0;
- if (ei_local->tx1 > 0)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
- dev->trans_start = jiffies;
- ei_local->tx1 = -1;
- ei_local->lasttx = 1;
- }
- else
- ei_local->lasttx = 10, ei_local->txing = 0;
- }
-// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
-// dev->name, ei_local->lasttx);
-
- /* Minimize Tx latency: update the statistics after we restart TXing. */
- if (status & ENTSR_COL)
- ei_local->stat.collisions++;
- if (status & ENTSR_PTX)
- ei_local->stat.tx_packets++;
- else
- {
- ei_local->stat.tx_errors++;
- if (status & ENTSR_ABT)
- {
- ei_local->stat.tx_aborted_errors++;
- ei_local->stat.collisions += 16;
- }
- if (status & ENTSR_CRS)
- ei_local->stat.tx_carrier_errors++;
- if (status & ENTSR_FU)
- ei_local->stat.tx_fifo_errors++;
- if (status & ENTSR_CDH)
- ei_local->stat.tx_heartbeat_errors++;
- if (status & ENTSR_OWC)
- ei_local->stat.tx_window_errors++;
- }
- netif_wake_queue(dev);
-}
-
-/**
- * ei_receive - receive some packets
- * @dev: network device with which receive will be run
- *
- * We have a good packet(s), get it/them out of the buffers.
- * Called with lock held.
- */
-
-static void ei_receive(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned char rxing_page, this_frame, next_frame;
- unsigned short current_offset;
- int rx_pkt_count = 0;
- struct e8390_pkt_hdr rx_frame;
- int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
-
- while (++rx_pkt_count < 10)
- {
- int pkt_len, pkt_stat;
-
- /* Get the rx page (incoming packet pointer). */
- outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
- rxing_page = inb_p(e8390_base + EN1_CURPAG);
- outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
-
- /* Remove one frame from the ring. Boundary is always a page behind. */
- this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
- if (this_frame >= ei_local->stop_page)
- this_frame = ei_local->rx_start_page;
-
- /* Someday we'll omit the previous, iff we never get this message.
- (There is at least one clone claimed to have a problem.)
-
- Keep quiet if it looks like a card removal. One problem here
- is that some clones crash in roughly the same way.
- */
- if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
- printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
- dev->name, this_frame, ei_local->current_page);
-
- if (this_frame == rxing_page) /* Read all the frames? */
- break; /* Done for now */
-
- current_offset = this_frame << 8;
- ei_get_8390_hdr(dev, &rx_frame, this_frame);
-
- pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
- pkt_stat = rx_frame.status;
-
- next_frame = this_frame + 1 + ((pkt_len+4)>>8);
-
- /* Check for bogosity warned by 3c503 book: the status byte is never
- written. This happened a lot during testing! This code should be
- cleaned up someday. */
- if (rx_frame.next != next_frame
- && rx_frame.next != next_frame + 1
- && rx_frame.next != next_frame - num_rx_pages
- && rx_frame.next != next_frame + 1 - num_rx_pages) {
- ei_local->current_page = rxing_page;
- outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
- ei_local->stat.rx_errors++;
- continue;
- }
-
- if (pkt_len < 60 || pkt_len > 1518)
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
- dev->name, rx_frame.count, rx_frame.status,
- rx_frame.next);
- ei_local->stat.rx_errors++;
- ei_local->stat.rx_length_errors++;
- }
- else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
- {
- struct sk_buff *skb;
-
- skb = dev_alloc_skb(pkt_len+2);
- if (skb == NULL)
- {
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
- dev->name, pkt_len);
- ei_local->stat.rx_dropped++;
- break;
- }
- else
- {
- skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
- skb->dev = dev;
- skb_put(skb, pkt_len); /* Make room */
- ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- ei_local->stat.rx_packets++;
- ei_local->stat.rx_bytes += pkt_len;
- if (pkt_stat & ENRSR_PHY)
- ei_local->stat.multicast++;
- }
- }
- else
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
- dev->name, rx_frame.status, rx_frame.next,
- rx_frame.count);
- ei_local->stat.rx_errors++;
- /* NB: The NIC counts CRC, frame and missed errors. */
- if (pkt_stat & ENRSR_FO)
- ei_local->stat.rx_fifo_errors++;
- }
- next_frame = rx_frame.next;
-
- /* This _should_ never happen: it's here for avoiding bad clones. */
- if (next_frame >= ei_local->stop_page) {
- printk("%s: next frame inconsistency, %#2x\n", dev->name,
- next_frame);
- next_frame = ei_local->rx_start_page;
- }
- ei_local->current_page = next_frame;
- outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
- }
-
- /* We used to also ack ENISR_OVER here, but that would sometimes mask
- a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
- outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
- return;
-}
-
-/**
- * ei_rx_overrun - handle receiver overrun
- * @dev: network device which threw exception
- *
- * We have a receiver overrun: we have to kick the 8390 to get it started
- * again. Problem is that you have to kick it exactly as NS prescribes in
- * the updated datasheets, or "the NIC may act in an unpredictable manner."
- * This includes causing "the NIC to defer indefinitely when it is stopped
- * on a busy network." Ugh.
- * Called with lock held. Don't call this with the interrupts off or your
- * computer will hate you - it takes 10ms or so.
- */
-
-static void ei_rx_overrun(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- unsigned char was_txing, must_resend = 0;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
-
- /*
- * Record whether a Tx was in progress and then issue the
- * stop command.
- */
- was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
-
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
- ei_local->stat.rx_over_errors++;
-
- /*
- * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
- * Early datasheets said to poll the reset bit, but now they say that
- * it "is not a reliable indicator and subsequently should be ignored."
- * We wait at least 10ms.
- */
-
- mdelay(10);
-
- /*
- * Reset RBCR[01] back to zero as per magic incantation.
- */
- outb_p(0x00, e8390_base+EN0_RCNTLO);
- outb_p(0x00, e8390_base+EN0_RCNTHI);
-
- /*
- * See if any Tx was interrupted or not. According to NS, this
- * step is vital, and skipping it will cause no end of havoc.
- */
-
- if (was_txing)
- {
- unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
- if (!tx_completed)
- must_resend = 1;
- }
-
- /*
- * Have to enter loopback mode and then restart the NIC before
- * you are allowed to slurp packets up off the ring.
- */
- outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
- outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
-
- /*
- * Clear the Rx ring of all the debris, and ack the interrupt.
- */
- ei_receive(dev);
- outb_p(ENISR_OVER, e8390_base+EN0_ISR);
-
- /*
- * Leave loopback mode, and resend any packet that got stopped.
- */
- outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
- if (must_resend)
- outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
-}
-
-/*
- * Collect the stats. This is called unlocked and from several contexts.
- */
-
-static struct net_device_stats *get_stats(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned long flags;
-
- /* If the card is stopped, just return the present stats. */
- if (!netif_running(dev))
- return &ei_local->stat;
-
- spin_lock_irqsave(&ei_local->page_lock,flags);
- /* Read the counter registers, assuming we are in page 0. */
- ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
- ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
- ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- return &ei_local->stat;