- if (skb == NULL) {
- int i;
- if (netif_msg_drv(lp))
- printk(KERN_ERR
- "%s: Memory squeeze, deferring packet.\n",
- dev->name);
- for (i = 0; i < lp->rx_ring_size; i++)
- if ((short)
- le16_to_cpu(lp->
- rx_ring[(entry +
- i)
- & lp->
- rx_mod_mask].
- status) < 0)
- break;
-
- if (i > lp->rx_ring_size - 2) {
- lp->stats.rx_dropped++;
- lp->rx_ring[entry].status |=
- le16_to_cpu(0x8000);
- wmb(); /* Make sure adapter sees owner change */
- lp->cur_rx++;
- }
- break;
- }
- skb->dev = dev;
- if (!rx_in_place) {
- skb_reserve(skb, 2); /* 16 byte align */
- skb_put(skb, pkt_len); /* Make room */
- pci_dma_sync_single_for_cpu(lp->pci_dev,
- lp->
- rx_dma_addr
- [entry],
- PKT_BUF_SZ -
- 2,
- PCI_DMA_FROMDEVICE);
- eth_copy_and_sum(skb,
- (unsigned char *)(lp->
- rx_skbuff
- [entry]->
- data),
- pkt_len, 0);
- pci_dma_sync_single_for_device(lp->
- pci_dev,
- lp->
- rx_dma_addr
- [entry],
- PKT_BUF_SZ
- - 2,
- PCI_DMA_FROMDEVICE);
- }
- lp->stats.rx_bytes += skb->len;
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- }
- }
+ /* Discard oversize frames. */
+ if (unlikely(pkt_len > PKT_BUF_SIZE)) {
+ if (netif_msg_drv(lp))
+ printk(KERN_ERR "%s: Impossible packet size %d!\n",
+ dev->name, pkt_len);
+ dev->stats.rx_errors++;
+ return;
+ }
+ if (pkt_len < 60) {
+ if (netif_msg_rx_err(lp))
+ printk(KERN_ERR "%s: Runt packet!\n", dev->name);
+ dev->stats.rx_errors++;
+ return;
+ }
+
+ if (pkt_len > rx_copybreak) {
+ struct sk_buff *newskb;
+
+ if ((newskb = dev_alloc_skb(PKT_BUF_SKB))) {
+ skb_reserve(newskb, NET_IP_ALIGN);
+ skb = lp->rx_skbuff[entry];
+ pci_unmap_single(lp->pci_dev,
+ lp->rx_dma_addr[entry],
+ PKT_BUF_SIZE,
+ PCI_DMA_FROMDEVICE);
+ skb_put(skb, pkt_len);
+ lp->rx_skbuff[entry] = newskb;
+ lp->rx_dma_addr[entry] =
+ pci_map_single(lp->pci_dev,
+ newskb->data,
+ PKT_BUF_SIZE,
+ PCI_DMA_FROMDEVICE);
+ rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
+ rx_in_place = 1;
+ } else
+ skb = NULL;
+ } else {
+ skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
+ }
+
+ if (skb == NULL) {
+ if (netif_msg_drv(lp))
+ printk(KERN_ERR
+ "%s: Memory squeeze, dropping packet.\n",
+ dev->name);
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb->dev = dev;
+ if (!rx_in_place) {
+ skb_reserve(skb, NET_IP_ALIGN);
+ skb_put(skb, pkt_len); /* Make room */
+ pci_dma_sync_single_for_cpu(lp->pci_dev,
+ lp->rx_dma_addr[entry],
+ pkt_len,
+ PCI_DMA_FROMDEVICE);
+ skb_copy_to_linear_data(skb,
+ (unsigned char *)(lp->rx_skbuff[entry]->data),
+ pkt_len);
+ pci_dma_sync_single_for_device(lp->pci_dev,
+ lp->rx_dma_addr[entry],
+ pkt_len,
+ PCI_DMA_FROMDEVICE);
+ }
+ dev->stats.rx_bytes += skb->len;
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb(skb);
+ dev->last_rx = jiffies;
+ dev->stats.rx_packets++;
+ return;
+}
+
+static int pcnet32_rx(struct net_device *dev, int budget)
+{
+ struct pcnet32_private *lp = netdev_priv(dev);
+ int entry = lp->cur_rx & lp->rx_mod_mask;
+ struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
+ int npackets = 0;
+
+ /* If we own the next entry, it's a new packet. Send it up. */
+ while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
+ pcnet32_rx_entry(dev, lp, rxp, entry);
+ npackets += 1;