+ struct r6040_descriptor *desc = desc_ring;
+ dma_addr_t mapping = desc_dma;
+
+ while (size-- > 0) {
+ mapping += sizeof(*desc);
+ desc->ndesc = cpu_to_le32(mapping);
+ desc->vndescp = desc + 1;
+ desc++;
+ }
+ desc--;
+ desc->ndesc = cpu_to_le32(desc_dma);
+ desc->vndescp = desc_ring;
+}
+
+static void r6040_init_txbufs(struct net_device *dev)
+{
+ struct r6040_private *lp = netdev_priv(dev);
+
+ lp->tx_free_desc = TX_DCNT;
+
+ lp->tx_remove_ptr = lp->tx_insert_ptr = lp->tx_ring;
+ r6040_init_ring_desc(lp->tx_ring, lp->tx_ring_dma, TX_DCNT);
+}
+
+static int r6040_alloc_rxbufs(struct net_device *dev)
+{
+ struct r6040_private *lp = netdev_priv(dev);
+ struct r6040_descriptor *desc;
+ struct sk_buff *skb;
+ int rc;
+
+ lp->rx_remove_ptr = lp->rx_insert_ptr = lp->rx_ring;
+ r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT);
+
+ /* Allocate skbs for the rx descriptors */
+ desc = lp->rx_ring;
+ do {
+ skb = netdev_alloc_skb(dev, MAX_BUF_SIZE);
+ if (!skb) {
+ printk(KERN_ERR "%s: failed to alloc skb for rx\n", dev->name);
+ rc = -ENOMEM;
+ goto err_exit;
+ }
+ desc->skb_ptr = skb;
+ desc->buf = cpu_to_le32(pci_map_single(lp->pdev,
+ desc->skb_ptr->data,
+ MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
+ desc->status = DSC_OWNER_MAC;
+ desc = desc->vndescp;
+ } while (desc != lp->rx_ring);
+
+ return 0;
+
+err_exit:
+ /* Deallocate all previously allocated skbs */
+ r6040_free_rxbufs(dev);
+ return rc;
+}
+
+static void r6040_init_mac_regs(struct net_device *dev)
+{
+ struct r6040_private *lp = netdev_priv(dev);