+static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
+ int status)
+{
+ struct net_device_stats *stats = &ep->stats;
+
+#ifndef final_version
+ /* There was an major error, log it. */
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
+ dev->name, status);
+#endif
+ stats->tx_errors++;
+ if (status & 0x1050)
+ stats->tx_aborted_errors++;
+ if (status & 0x0008)
+ stats->tx_carrier_errors++;
+ if (status & 0x0040)
+ stats->tx_window_errors++;
+ if (status & 0x0010)
+ stats->tx_fifo_errors++;
+}
+
+static void epic_tx(struct net_device *dev, struct epic_private *ep)
+{
+ unsigned int dirty_tx, cur_tx;
+
+ /*
+ * Note: if this lock becomes a problem we can narrow the locked
+ * region at the cost of occasionally grabbing the lock more times.
+ */
+ cur_tx = ep->cur_tx;
+ for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
+ struct sk_buff *skb;
+ int entry = dirty_tx % TX_RING_SIZE;
+ int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
+
+ if (txstatus & DescOwn)
+ break; /* It still hasn't been Txed */
+
+ if (likely(txstatus & 0x0001)) {
+ ep->stats.collisions += (txstatus >> 8) & 15;
+ ep->stats.tx_packets++;
+ ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
+ } else
+ epic_tx_error(dev, ep, txstatus);
+
+ /* Free the original skb. */
+ skb = ep->tx_skbuff[entry];
+ pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
+ skb->len, PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(skb);
+ ep->tx_skbuff[entry] = NULL;
+ }
+
+#ifndef final_version
+ if (cur_tx - dirty_tx > TX_RING_SIZE) {
+ printk(KERN_WARNING
+ "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
+ dev->name, dirty_tx, cur_tx, ep->tx_full);
+ dirty_tx += TX_RING_SIZE;
+ }
+#endif
+ ep->dirty_tx = dirty_tx;
+ if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
+ /* The ring is no longer full, allow new TX entries. */
+ ep->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+}
+