1 files changed, 77 insertions, 13 deletions

diff --git a/drivers/net/via-rhine.c b/drivers/net/via-rhine.c
index d3d0ec970318..ae971080e2e4 100644
--- a/drivers/net/via-rhine.c
+++ b/drivers/net/via-rhine.c
@@ -30,8 +30,8 @@
 */
 
 #define DRV_NAME        "via-rhine"
-#define DRV_VERSION     "1.4.0"
-#define DRV_RELDATE     "June-27-2006"
+#define DRV_VERSION     "1.4.1"
+#define DRV_RELDATE     "July-24-2006"
 
 
 /* A few user-configurable values.
@@ -44,6 +44,10 @@ static int max_interrupt_work = 20;
    Setting to > 1518 effectively disables this feature. */
 static int rx_copybreak;
 
+/* Work-around for broken BIOSes: they are unable to get the chip back out of
+   power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */
+static int avoid_D3;
+
 /*
  * In case you are looking for 'options[]' or 'full_duplex[]', they
  * are gone. Use ethtool(8) instead.
@@ -63,7 +67,11 @@ static const int multicast_filter_limit = 32;
    There are no ill effects from too-large receive rings. */
 #define TX_RING_SIZE    16
 #define TX_QUEUE_LEN    10      /* Limit ring entries actually used. */
+#ifdef CONFIG_VIA_RHINE_NAPI
+#define RX_RING_SIZE    64
+#else
 #define RX_RING_SIZE    16
+#endif
 
 
 /* Operational parameters that usually are not changed. */
@@ -116,9 +124,11 @@ MODULE_LICENSE("GPL");
 module_param(max_interrupt_work, int, 0);
 module_param(debug, int, 0);
 module_param(rx_copybreak, int, 0);
+module_param(avoid_D3, bool, 0);
 MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
 MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
 MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)");
 
 /*
                 Theory of Operation
@@ -396,7 +406,7 @@ static void rhine_tx_timeout(struct net_device *dev);
 static int  rhine_start_tx(struct sk_buff *skb, struct net_device *dev);
 static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
 static void rhine_tx(struct net_device *dev);
-static void rhine_rx(struct net_device *dev);
+static int rhine_rx(struct net_device *dev, int limit);
 static void rhine_error(struct net_device *dev, int intr_status);
 static void rhine_set_rx_mode(struct net_device *dev);
 static struct net_device_stats *rhine_get_stats(struct net_device *dev);
@@ -564,6 +574,32 @@ static void rhine_poll(struct net_device *dev)
 }
 #endif
 
+#ifdef CONFIG_VIA_RHINE_NAPI
+static int rhine_napipoll(struct net_device *dev, int *budget)
+{
+        struct rhine_private *rp = netdev_priv(dev);
+        void __iomem *ioaddr = rp->base;
+        int done, limit = min(dev->quota, *budget);
+
+        done = rhine_rx(dev, limit);
+        *budget -= done;
+        dev->quota -= done;
+
+        if (done < limit) {
+                netif_rx_complete(dev);
+
+                iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
+                          IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
+                          IntrTxDone | IntrTxError | IntrTxUnderrun |
+                          IntrPCIErr | IntrStatsMax | IntrLinkChange,
+                          ioaddr + IntrEnable);
+                return 0;
+        }
+        else
+                return 1;
+}
+#endif
+
 static void rhine_hw_init(struct net_device *dev, long pioaddr)
 {
         struct rhine_private *rp = netdev_priv(dev);
@@ -744,6 +780,10 @@ static int __devinit rhine_init_one(struct pci_dev *pdev,
 #ifdef CONFIG_NET_POLL_CONTROLLER
         dev->poll_controller = rhine_poll;
 #endif
+#ifdef CONFIG_VIA_RHINE_NAPI
+        dev->poll = rhine_napipoll;
+        dev->weight = 64;
+#endif
         if (rp->quirks & rqRhineI)
                 dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
 
@@ -789,6 +829,9 @@ static int __devinit rhine_init_one(struct pci_dev *pdev,
                 }
         }
         rp->mii_if.phy_id = phy_id;
+        if (debug > 1 && avoid_D3)
+                printk(KERN_INFO "%s: No D3 power state at shutdown.\n",
+                       dev->name);
 
         return 0;
 
@@ -1014,6 +1057,8 @@ static void init_registers(struct net_device *dev)
 
         rhine_set_rx_mode(dev);
 
+        netif_poll_enable(dev);
+
         /* Enable interrupts by setting the interrupt mask. */
         iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
                IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
@@ -1268,8 +1313,18 @@ static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *
                                dev->name, intr_status);
 
                 if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped |
-                    IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf))
-                        rhine_rx(dev);
+                                   IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf)) {
+#ifdef CONFIG_VIA_RHINE_NAPI
+                        iowrite16(IntrTxAborted |
+                                  IntrTxDone | IntrTxError | IntrTxUnderrun |
+                                  IntrPCIErr | IntrStatsMax | IntrLinkChange,
+                                  ioaddr + IntrEnable);
+
+                        netif_rx_schedule(dev);
+#else
+                        rhine_rx(dev, RX_RING_SIZE);
+#endif
+                }
 
                 if (intr_status & (IntrTxErrSummary | IntrTxDone)) {
                         if (intr_status & IntrTxErrSummary) {
@@ -1367,13 +1422,12 @@ static void rhine_tx(struct net_device *dev)
         spin_unlock(&rp->lock);
 }
 
-/* This routine is logically part of the interrupt handler, but isolated
-   for clarity and better register allocation. */
-static void rhine_rx(struct net_device *dev)
+/* Process up to limit frames from receive ring */
+static int rhine_rx(struct net_device *dev, int limit)
 {
         struct rhine_private *rp = netdev_priv(dev);
+        int count;
         int entry = rp->cur_rx % RX_RING_SIZE;
-        int boguscnt = rp->dirty_rx + RX_RING_SIZE - rp->cur_rx;
 
         if (debug > 4) {
                 printk(KERN_DEBUG "%s: rhine_rx(), entry %d status %8.8x.\n",
@@ -1382,16 +1436,18 @@ static void rhine_rx(struct net_device *dev)
         }
 
         /* If EOP is set on the next entry, it's a new packet. Send it up. */
-        while (!(rp->rx_head_desc->rx_status & cpu_to_le32(DescOwn))) {
+        for (count = 0; count < limit; ++count) {
                 struct rx_desc *desc = rp->rx_head_desc;
                 u32 desc_status = le32_to_cpu(desc->rx_status);
                 int data_size = desc_status >> 16;
 
+                if (desc_status & DescOwn)
+                        break;
+
                 if (debug > 4)
                         printk(KERN_DEBUG "rhine_rx() status is %8.8x.\n",
                                desc_status);
-                if (--boguscnt < 0)
-                        break;
+
                 if ((desc_status & (RxWholePkt | RxErr)) != RxWholePkt) {
                         if ((desc_status & RxWholePkt) != RxWholePkt) {
                                 printk(KERN_WARNING "%s: Oversized Ethernet "
@@ -1460,7 +1516,11 @@ static void rhine_rx(struct net_device *dev)
                                                  PCI_DMA_FROMDEVICE);
                         }
                         skb->protocol = eth_type_trans(skb, dev);
+#ifdef CONFIG_VIA_RHINE_NAPI
+                        netif_receive_skb(skb);
+#else
                         netif_rx(skb);
+#endif
                         dev->last_rx = jiffies;
                         rp->stats.rx_bytes += pkt_len;
                         rp->stats.rx_packets++;
@@ -1487,6 +1547,8 @@ static void rhine_rx(struct net_device *dev)
                 }
                 rp->rx_ring[entry].rx_status = cpu_to_le32(DescOwn);
         }
+
+        return count;
 }
 
 /*
@@ -1776,6 +1838,7 @@ static int rhine_close(struct net_device *dev)
         spin_lock_irq(&rp->lock);
 
         netif_stop_queue(dev);
+        netif_poll_disable(dev);
 
         if (debug > 1)
                 printk(KERN_DEBUG "%s: Shutting down ethercard, "
@@ -1857,7 +1920,8 @@ static void rhine_shutdown (struct pci_dev *pdev)
         }
 
         /* Hit power state D3 (sleep) */
-        iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);
+        if (!avoid_D3)
+                iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW);
 
         /* TODO: Check use of pci_enable_wake() */