+/* if any allocation fails, caller must also call pcnet32_free_ring */
+static int pcnet32_alloc_ring(struct net_device *dev, char *name)
+{
+ struct pcnet32_private *lp = dev->priv;
+
+ lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
+ sizeof(struct pcnet32_tx_head) * lp->tx_ring_size,
+ &lp->tx_ring_dma_addr);
+ if (lp->tx_ring == NULL) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Consistent memory allocation failed.\n",
+ name);
+ return -ENOMEM;
+ }
+
+ lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
+ sizeof(struct pcnet32_rx_head) * lp->rx_ring_size,
+ &lp->rx_ring_dma_addr);
+ if (lp->rx_ring == NULL) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Consistent memory allocation failed.\n",
+ name);
+ return -ENOMEM;
+ }
+
+ lp->tx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->tx_ring_size,
+ GFP_ATOMIC);
+ if (!lp->tx_dma_addr) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Memory allocation failed.\n", name);
+ return -ENOMEM;
+ }
+ memset(lp->tx_dma_addr, 0, sizeof(dma_addr_t) * lp->tx_ring_size);
+
+ lp->rx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->rx_ring_size,
+ GFP_ATOMIC);
+ if (!lp->rx_dma_addr) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Memory allocation failed.\n", name);
+ return -ENOMEM;
+ }
+ memset(lp->rx_dma_addr, 0, sizeof(dma_addr_t) * lp->rx_ring_size);
+
+ lp->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->tx_ring_size,
+ GFP_ATOMIC);
+ if (!lp->tx_skbuff) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Memory allocation failed.\n", name);
+ return -ENOMEM;
+ }
+ memset(lp->tx_skbuff, 0, sizeof(struct sk_buff *) * lp->tx_ring_size);
+
+ lp->rx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->rx_ring_size,
+ GFP_ATOMIC);
+ if (!lp->rx_skbuff) {
+ if (pcnet32_debug & NETIF_MSG_DRV)
+ printk("\n" KERN_ERR PFX "%s: Memory allocation failed.\n", name);
+ return -ENOMEM;
+ }
+ memset(lp->rx_skbuff, 0, sizeof(struct sk_buff *) * lp->rx_ring_size);
+
+ return 0;
+}
+
+
+static void pcnet32_free_ring(struct net_device *dev)
+{
+ struct pcnet32_private *lp = dev->priv;
+
+ kfree(lp->tx_skbuff);
+ lp->tx_skbuff = NULL;
+
+ kfree(lp->rx_skbuff);
+ lp->rx_skbuff = NULL;
+
+ kfree(lp->tx_dma_addr);
+ lp->tx_dma_addr = NULL;
+
+ kfree(lp->rx_dma_addr);
+ lp->rx_dma_addr = NULL;
+
+ if (lp->tx_ring) {
+ pci_free_consistent(lp->pci_dev, sizeof(struct pcnet32_tx_head) * lp->tx_ring_size,
+ lp->tx_ring, lp->tx_ring_dma_addr);
+ lp->tx_ring = NULL;
+ }
+
+ if (lp->rx_ring) {
+ pci_free_consistent(lp->pci_dev, sizeof(struct pcnet32_rx_head) * lp->rx_ring_size,
+ lp->rx_ring, lp->rx_ring_dma_addr);
+ lp->rx_ring = NULL;
+ }
+}
+
+