1 files changed, 220 insertions, 58 deletions

diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index 113b68099216..70fe81a89df9 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -22,8 +22,8 @@
  *************************************************************************/
 
 #define DRV_NAME        "pcnet32"
-#define DRV_VERSION     "1.30j"
-#define DRV_RELDATE     "29.04.2005"
+#define DRV_VERSION     "1.31a"
+#define DRV_RELDATE     "12.Sep.2005"
 #define PFX             DRV_NAME ": "
 
 static const char *version =
@@ -257,6 +257,9 @@ static int homepna[MAX_UNITS];
  * v1.30h  24 Jun 2004 Don Fry correctly select auto, speed, duplex in bcr32.
  * v1.30i  28 Jun 2004 Don Fry change to use module_param.
  * v1.30j  29 Apr 2005 Don Fry fix skb/map leak with loopback test.
+ * v1.31   02 Sep 2005 Hubert WS Lin <wslin@tw.ibm.c0m> added set_ringparam().
+ * v1.31a  12 Sep 2005 Hubert WS Lin <wslin@tw.ibm.c0m> set min ring size to 4
+ *         to allow loopback test to work unchanged.
  */
 
 
@@ -266,17 +269,17 @@ static int homepna[MAX_UNITS];
  * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
  */
 #ifndef PCNET32_LOG_TX_BUFFERS
-#define PCNET32_LOG_TX_BUFFERS 4
-#define PCNET32_LOG_RX_BUFFERS 5
+#define PCNET32_LOG_TX_BUFFERS          4
+#define PCNET32_LOG_RX_BUFFERS          5
+#define PCNET32_LOG_MAX_TX_BUFFERS      9       /* 2^9 == 512 */
+#define PCNET32_LOG_MAX_RX_BUFFERS      9
 #endif
 
 #define TX_RING_SIZE            (1 << (PCNET32_LOG_TX_BUFFERS))
-#define TX_RING_MOD_MASK        (TX_RING_SIZE - 1)
-#define TX_RING_LEN_BITS        ((PCNET32_LOG_TX_BUFFERS) << 12)
+#define TX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_TX_BUFFERS))
 
 #define RX_RING_SIZE            (1 << (PCNET32_LOG_RX_BUFFERS))
-#define RX_RING_MOD_MASK        (RX_RING_SIZE - 1)
-#define RX_RING_LEN_BITS        ((PCNET32_LOG_RX_BUFFERS) << 4)
+#define RX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_RX_BUFFERS))
 
 #define PKT_BUF_SZ              1544
 
@@ -334,14 +337,14 @@ struct pcnet32_access {
 };
 
 /*
- * The first three fields of pcnet32_private are read by the ethernet device
- * so we allocate the structure should be allocated by pci_alloc_consistent().
+ * The first field of pcnet32_private is read by the ethernet device
+ * so the structure should be allocated using pci_alloc_consistent().
  */
 struct pcnet32_private {
-    /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
-    struct pcnet32_rx_head    rx_ring[RX_RING_SIZE];
-    struct pcnet32_tx_head    tx_ring[TX_RING_SIZE];
     struct pcnet32_init_block init_block;
+    /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
+    struct pcnet32_rx_head    *rx_ring;
+    struct pcnet32_tx_head    *tx_ring;
     dma_addr_t          dma_addr;       /* DMA address of beginning of this
                                            object, returned by
                                            pci_alloc_consistent */
@@ -349,13 +352,21 @@ struct pcnet32_private {
                                            structure */
     const char          *name;
     /* The saved address of a sent-in-place packet/buffer, for skfree(). */
-    struct sk_buff      *tx_skbuff[TX_RING_SIZE];
-    struct sk_buff      *rx_skbuff[RX_RING_SIZE];
-    dma_addr_t          tx_dma_addr[TX_RING_SIZE];
-    dma_addr_t          rx_dma_addr[RX_RING_SIZE];
+    struct sk_buff      **tx_skbuff;
+    struct sk_buff      **rx_skbuff;
+    dma_addr_t          *tx_dma_addr;
+    dma_addr_t          *rx_dma_addr;
     struct pcnet32_access       a;
     spinlock_t          lock;           /* Guard lock */
     unsigned int        cur_rx, cur_tx; /* The next free ring entry */
+    unsigned int        rx_ring_size;   /* current rx ring size */
+    unsigned int        tx_ring_size;   /* current tx ring size */
+    unsigned int        rx_mod_mask;    /* rx ring modular mask */
+    unsigned int        tx_mod_mask;    /* tx ring modular mask */
+    unsigned short      rx_len_bits;
+    unsigned short      tx_len_bits;
+    dma_addr_t          rx_ring_dma_addr;
+    dma_addr_t          tx_ring_dma_addr;
     unsigned int        dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
     struct net_device_stats stats;
     char                tx_full;
@@ -397,6 +408,9 @@ static int pcnet32_get_regs_len(struct net_device *dev);
 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
         void *ptr);
 static void pcnet32_purge_tx_ring(struct net_device *dev);
+static int pcnet32_alloc_ring(struct net_device *dev);
+static void pcnet32_free_ring(struct net_device *dev);
+
 
 enum pci_flags_bit {
     PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
@@ -613,10 +627,62 @@ static void pcnet32_get_ringparam(struct net_device *dev, struct ethtool_ringpar
 {
     struct pcnet32_private *lp = dev->priv;
 
-    ering->tx_max_pending = TX_RING_SIZE - 1;
-    ering->tx_pending = lp->cur_tx - lp->dirty_tx;
-    ering->rx_max_pending = RX_RING_SIZE - 1;
-    ering->rx_pending = lp->cur_rx & RX_RING_MOD_MASK;
+    ering->tx_max_pending = TX_MAX_RING_SIZE - 1;
+    ering->tx_pending = lp->tx_ring_size - 1;
+    ering->rx_max_pending = RX_MAX_RING_SIZE - 1;
+    ering->rx_pending = lp->rx_ring_size - 1;
+}
+
+static int pcnet32_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ering)
+{
+    struct pcnet32_private *lp = dev->priv;
+    unsigned long flags;
+    int i;
+
+    if (ering->rx_mini_pending || ering->rx_jumbo_pending)
+        return -EINVAL;
+
+    if (netif_running(dev))
+        pcnet32_close(dev);
+
+    spin_lock_irqsave(&lp->lock, flags);
+    pcnet32_free_ring(dev);
+    lp->tx_ring_size = min(ering->tx_pending, (unsigned int) TX_MAX_RING_SIZE);
+    lp->rx_ring_size = min(ering->rx_pending, (unsigned int) RX_MAX_RING_SIZE);
+
+    /* set the minimum ring size to 4, to allow the loopback test to work
+     * unchanged.
+     */
+    for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
+        if (lp->tx_ring_size <= (1 << i))
+            break;
+    }
+    lp->tx_ring_size = (1 << i);
+    lp->tx_mod_mask = lp->tx_ring_size - 1;
+    lp->tx_len_bits = (i << 12);
+
+    for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
+        if (lp->rx_ring_size <= (1 << i))
+            break;
+    }
+    lp->rx_ring_size = (1 << i);
+    lp->rx_mod_mask = lp->rx_ring_size - 1;
+    lp->rx_len_bits = (i << 4);
+
+    if (pcnet32_alloc_ring(dev)) {
+        pcnet32_free_ring(dev);
+        return -ENOMEM;
+    }
+
+    spin_unlock_irqrestore(&lp->lock, flags);
+
+    if (pcnet32_debug & NETIF_MSG_DRV)
+        printk(KERN_INFO PFX "Ring Param Settings: RX: %d, TX: %d\n", lp->rx_ring_size, lp->tx_ring_size);
+
+    if (netif_running(dev))
+        pcnet32_open(dev);
+
+    return 0;
 }
 
 static void pcnet32_get_strings(struct net_device *dev, u32 stringset, u8 *data)
@@ -948,6 +1014,7 @@ static struct ethtool_ops pcnet32_ethtool_ops = {
     .nway_reset         = pcnet32_nway_reset,
     .get_link           = pcnet32_get_link,
     .get_ringparam      = pcnet32_get_ringparam,
+    .set_ringparam      = pcnet32_set_ringparam,
     .get_tx_csum        = ethtool_op_get_tx_csum,
     .get_sg             = ethtool_op_get_sg,
     .get_tso            = ethtool_op_get_tso,
@@ -957,6 +1024,7 @@ static struct ethtool_ops pcnet32_ethtool_ops = {
     .phys_id            = pcnet32_phys_id,
     .get_regs_len       = pcnet32_get_regs_len,
     .get_regs           = pcnet32_get_regs,
+    .get_perm_addr      = ethtool_op_get_perm_addr,
 };
 
 /* only probes for non-PCI devices, the rest are handled by
@@ -1185,9 +1253,10 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
             memcpy(dev->dev_addr, promaddr, 6);
         }
     }
+    memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 
     /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
-    if (!is_valid_ether_addr(dev->dev_addr))
+    if (!is_valid_ether_addr(dev->perm_addr))
         memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
 
     if (pcnet32_debug & NETIF_MSG_PROBE) {
@@ -1239,6 +1308,12 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
     dev->priv = lp;
     lp->name = chipname;
     lp->shared_irq = shared;
+    lp->tx_ring_size = TX_RING_SIZE;            /* default tx ring size */
+    lp->rx_ring_size = RX_RING_SIZE;            /* default rx ring size */
+    lp->tx_mod_mask = lp->tx_ring_size - 1;
+    lp->rx_mod_mask = lp->rx_ring_size - 1;
+    lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
+    lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
     lp->mii_if.full_duplex = fdx;
     lp->mii_if.phy_id_mask = 0x1f;
     lp->mii_if.reg_num_mask = 0x1f;
@@ -1265,21 +1340,23 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
     }
     lp->a = *a;
 
+    if (pcnet32_alloc_ring(dev)) {
+        ret = -ENOMEM;
+        goto err_free_ring;
+    }
     /* detect special T1/E1 WAN card by checking for MAC address */
     if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0
             && dev->dev_addr[2] == 0x75)
         lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
 
     lp->init_block.mode = le16_to_cpu(0x0003);  /* Disable Rx and Tx. */
-    lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS);
+    lp->init_block.tlen_rlen = le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
     for (i = 0; i < 6; i++)
         lp->init_block.phys_addr[i] = dev->dev_addr[i];
     lp->init_block.filter[0] = 0x00000000;
     lp->init_block.filter[1] = 0x00000000;
-    lp->init_block.rx_ring = (u32)le32_to_cpu(lp->dma_addr +
-            offsetof(struct pcnet32_private, rx_ring));
-    lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr +
-            offsetof(struct pcnet32_private, tx_ring));
+    lp->init_block.rx_ring = (u32)le32_to_cpu(lp->rx_ring_dma_addr);
+    lp->init_block.tx_ring = (u32)le32_to_cpu(lp->tx_ring_dma_addr);
 
     /* switch pcnet32 to 32bit mode */
     a->write_bcr(ioaddr, 20, 2);
@@ -1310,7 +1387,7 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
             if (pcnet32_debug & NETIF_MSG_PROBE)
                 printk(", failed to detect IRQ line.\n");
             ret = -ENODEV;
-            goto err_free_consistent;
+            goto err_free_ring;
         }
         if (pcnet32_debug & NETIF_MSG_PROBE)
             printk(", probed IRQ %d.\n", dev->irq);
@@ -1341,7 +1418,7 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
 
     /* Fill in the generic fields of the device structure. */
     if (register_netdev(dev))
-        goto err_free_consistent;
+        goto err_free_ring;
 
     if (pdev) {
         pci_set_drvdata(pdev, dev);
@@ -1359,6 +1436,8 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
 
     return 0;
 
+err_free_ring:
+    pcnet32_free_ring(dev);
 err_free_consistent:
     pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
 err_free_netdev:
@@ -1369,6 +1448,86 @@ err_release_region:
 }
 
 
+static int pcnet32_alloc_ring(struct net_device *dev)
+{
+    struct pcnet32_private *lp = dev->priv;
+
+    if ((lp->tx_ring = pci_alloc_consistent(lp->pci_dev, sizeof(struct pcnet32_tx_head) * lp->tx_ring_size,
+        &lp->tx_ring_dma_addr)) == NULL) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Consistent memory allocation failed.\n");
+        return -ENOMEM;
+    }
+
+    if ((lp->rx_ring = pci_alloc_consistent(lp->pci_dev, sizeof(struct pcnet32_rx_head) * lp->rx_ring_size,
+        &lp->rx_ring_dma_addr)) == NULL) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Consistent memory allocation failed.\n");
+        return -ENOMEM;
+    }
+
+    if (!(lp->tx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->tx_ring_size, GFP_ATOMIC))) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Memory allocation failed.\n");
+        return -ENOMEM;
+    }
+    memset(lp->tx_dma_addr, 0, sizeof(dma_addr_t) * lp->tx_ring_size);
+
+    if (!(lp->rx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->rx_ring_size, GFP_ATOMIC))) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Memory allocation failed.\n");
+        return -ENOMEM;
+    }
+    memset(lp->rx_dma_addr, 0, sizeof(dma_addr_t) * lp->rx_ring_size);
+
+    if (!(lp->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->tx_ring_size, GFP_ATOMIC))) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Memory allocation failed.\n");
+        return -ENOMEM;
+    }
+    memset(lp->tx_skbuff, 0, sizeof(struct sk_buff *) * lp->tx_ring_size);
+
+    if (!(lp->rx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->rx_ring_size, GFP_ATOMIC))) {
+        if (pcnet32_debug & NETIF_MSG_DRV)
+            printk(KERN_ERR PFX "Memory allocation failed.\n");
+        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;
+    }
+}
+
+
 static int
 pcnet32_open(struct net_device *dev)
 {
@@ -1400,8 +1559,8 @@ pcnet32_open(struct net_device *dev)
     if (netif_msg_ifup(lp))
         printk(KERN_DEBUG "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
                dev->name, dev->irq,
-               (u32) (lp->dma_addr + offsetof(struct pcnet32_private, tx_ring)),
-               (u32) (lp->dma_addr + offsetof(struct pcnet32_private, rx_ring)),
+               (u32) (lp->tx_ring_dma_addr),
+               (u32) (lp->rx_ring_dma_addr),
                (u32) (lp->dma_addr + offsetof(struct pcnet32_private, init_block)));
 
     /* set/reset autoselect bit */
@@ -1521,7 +1680,7 @@ pcnet32_open(struct net_device *dev)
 
 err_free_ring:
     /* free any allocated skbuffs */
-    for (i = 0; i < RX_RING_SIZE; i++) {
+    for (i = 0; i < lp->rx_ring_size; i++) {
         lp->rx_ring[i].status = 0;
         if (lp->rx_skbuff[i]) {
             pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i], PKT_BUF_SZ-2,
@@ -1531,6 +1690,9 @@ err_free_ring:
         lp->rx_skbuff[i] = NULL;
         lp->rx_dma_addr[i] = 0;
     }
+
+    pcnet32_free_ring(dev);
+
     /*
      * Switch back to 16bit mode to avoid problems with dumb
      * DOS packet driver after a warm reboot
@@ -1562,7 +1724,7 @@ pcnet32_purge_tx_ring(struct net_device *dev)
     struct pcnet32_private *lp = dev->priv;
     int i;
 
-    for (i = 0; i < TX_RING_SIZE; i++) {
+    for (i = 0; i < lp->tx_ring_size; i++) {
         lp->tx_ring[i].status = 0;      /* CPU owns buffer */
         wmb();  /* Make sure adapter sees owner change */
         if (lp->tx_skbuff[i]) {
@@ -1587,7 +1749,7 @@ pcnet32_init_ring(struct net_device *dev)
     lp->cur_rx = lp->cur_tx = 0;
     lp->dirty_rx = lp->dirty_tx = 0;
 
-    for (i = 0; i < RX_RING_SIZE; i++) {
+    for (i = 0; i < lp->rx_ring_size; i++) {
         struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
         if (rx_skbuff == NULL) {
             if (!(rx_skbuff = lp->rx_skbuff[i] = dev_alloc_skb (PKT_BUF_SZ))) {
@@ -1611,20 +1773,18 @@ pcnet32_init_ring(struct net_device *dev)
     }
     /* The Tx buffer address is filled in as needed, but we do need to clear
      * the upper ownership bit. */
-    for (i = 0; i < TX_RING_SIZE; i++) {
+    for (i = 0; i < lp->tx_ring_size; i++) {
         lp->tx_ring[i].status = 0;      /* CPU owns buffer */
         wmb();  /* Make sure adapter sees owner change */
         lp->tx_ring[i].base = 0;
         lp->tx_dma_addr[i] = 0;
     }
 
-    lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS);
+    lp->init_block.tlen_rlen = le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
     for (i = 0; i < 6; i++)
         lp->init_block.phys_addr[i] = dev->dev_addr[i];
-    lp->init_block.rx_ring = (u32)le32_to_cpu(lp->dma_addr +
-            offsetof(struct pcnet32_private, rx_ring));
-    lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr +
-            offsetof(struct pcnet32_private, tx_ring));
+    lp->init_block.rx_ring = (u32)le32_to_cpu(lp->rx_ring_dma_addr);
+    lp->init_block.tx_ring = (u32)le32_to_cpu(lp->tx_ring_dma_addr);
     wmb();      /* Make sure all changes are visible */
     return 0;
 }
@@ -1682,13 +1842,13 @@ pcnet32_tx_timeout (struct net_device *dev)
         printk(KERN_DEBUG " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
            lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
            lp->cur_rx);
-        for (i = 0 ; i < RX_RING_SIZE; i++)
+        for (i = 0 ; i < lp->rx_ring_size; i++)
         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
                le32_to_cpu(lp->rx_ring[i].base),
                (-le16_to_cpu(lp->rx_ring[i].buf_length)) & 0xffff,
                le32_to_cpu(lp->rx_ring[i].msg_length),
                le16_to_cpu(lp->rx_ring[i].status));
-        for (i = 0 ; i < TX_RING_SIZE; i++)
+        for (i = 0 ; i < lp->tx_ring_size; i++)
         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
                le32_to_cpu(lp->tx_ring[i].base),
                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
@@ -1729,7 +1889,7 @@ pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
     /* Fill in a Tx ring entry */
 
     /* Mask to ring buffer boundary. */
-    entry = lp->cur_tx & TX_RING_MOD_MASK;
+    entry = lp->cur_tx & lp->tx_mod_mask;
 
     /* Caution: the write order is important here, set the status
      * with the "ownership" bits last. */
@@ -1753,7 +1913,7 @@ pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
     dev->trans_start = jiffies;
 
-    if (lp->tx_ring[(entry+1) & TX_RING_MOD_MASK].base != 0) {
+    if (lp->tx_ring[(entry+1) & lp->tx_mod_mask].base != 0) {
         lp->tx_full = 1;
         netif_stop_queue(dev);
     }
@@ -1806,7 +1966,7 @@ pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs)
             int delta;
 
             while (dirty_tx != lp->cur_tx) {
-                int entry = dirty_tx & TX_RING_MOD_MASK;
+                int entry = dirty_tx & lp->tx_mod_mask;
                 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
 
                 if (status < 0)
@@ -1864,18 +2024,18 @@ pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs)
                 dirty_tx++;
             }
 
-            delta = (lp->cur_tx - dirty_tx) & (TX_RING_MOD_MASK + TX_RING_SIZE);
-            if (delta > TX_RING_SIZE) {
+            delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
+            if (delta > lp->tx_ring_size) {
                 if (netif_msg_drv(lp))
                     printk(KERN_ERR "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
                             dev->name, dirty_tx, lp->cur_tx, lp->tx_full);
-                dirty_tx += TX_RING_SIZE;
-                delta -= TX_RING_SIZE;
+                dirty_tx += lp->tx_ring_size;
+                delta -= lp->tx_ring_size;
             }
 
             if (lp->tx_full &&
                 netif_queue_stopped(dev) &&
-                delta < TX_RING_SIZE - 2) {
+                delta < lp->tx_ring_size - 2) {
                 /* The ring is no longer full, clear tbusy. */
                 lp->tx_full = 0;
                 netif_wake_queue (dev);
@@ -1932,8 +2092,8 @@ static int
 pcnet32_rx(struct net_device *dev)
 {
     struct pcnet32_private *lp = dev->priv;
-    int entry = lp->cur_rx & RX_RING_MOD_MASK;
-    int boguscnt = RX_RING_SIZE / 2;
+    int entry = lp->cur_rx & lp->rx_mod_mask;
+    int boguscnt = lp->rx_ring_size / 2;
 
     /* If we own the next entry, it's a new packet. Send it up. */
     while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) {
@@ -1998,12 +2158,12 @@ pcnet32_rx(struct net_device *dev)
                     if (netif_msg_drv(lp))
                         printk(KERN_ERR "%s: Memory squeeze, deferring packet.\n",
                                 dev->name);
-                    for (i = 0; i < RX_RING_SIZE; i++)
+                    for (i = 0; i < lp->rx_ring_size; i++)
                         if ((short)le16_to_cpu(lp->rx_ring[(entry+i)
-                                    & RX_RING_MOD_MASK].status) < 0)
+                                    & lp->rx_mod_mask].status) < 0)
                             break;
 
-                    if (i > RX_RING_SIZE -2) {
+                    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 */
@@ -2041,7 +2201,7 @@ pcnet32_rx(struct net_device *dev)
         lp->rx_ring[entry].buf_length = le16_to_cpu(2-PKT_BUF_SZ);
         wmb(); /* Make sure owner changes after all others are visible */
         lp->rx_ring[entry].status |= le16_to_cpu(0x8000);
-        entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
+        entry = (++lp->cur_rx) & lp->rx_mod_mask;
         if (--boguscnt <= 0) break;     /* don't stay in loop forever */
     }
 
@@ -2084,7 +2244,7 @@ pcnet32_close(struct net_device *dev)
     spin_lock_irqsave(&lp->lock, flags);
 
     /* free all allocated skbuffs */
-    for (i = 0; i < RX_RING_SIZE; i++) {
+    for (i = 0; i < lp->rx_ring_size; i++) {
         lp->rx_ring[i].status = 0;
         wmb();          /* Make sure adapter sees owner change */
         if (lp->rx_skbuff[i]) {
@@ -2096,7 +2256,7 @@ pcnet32_close(struct net_device *dev)
         lp->rx_dma_addr[i] = 0;
     }
 
-    for (i = 0; i < TX_RING_SIZE; i++) {
+    for (i = 0; i < lp->tx_ring_size; i++) {
         lp->tx_ring[i].status = 0;      /* CPU owns buffer */
         wmb();          /* Make sure adapter sees owner change */
         if (lp->tx_skbuff[i]) {
@@ -2265,6 +2425,7 @@ static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
         struct pcnet32_private *lp = dev->priv;
 
         unregister_netdev(dev);
+        pcnet32_free_ring(dev);
         release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
         pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
         free_netdev(dev);
@@ -2340,6 +2501,7 @@ static void __exit pcnet32_cleanup_module(void)
         struct pcnet32_private *lp = pcnet32_dev->priv;
         next_dev = lp->next;
         unregister_netdev(pcnet32_dev);
+        pcnet32_free_ring(pcnet32_dev);
         release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
         pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
         free_netdev(pcnet32_dev);