forcedeth: napi - handle all processing

The napi poll routine has been modified to handle all interrupt events
and process them accordingly. Therefore, the ISR will now only schedule
the napi poll and disable all interrupts instead of just disabling rx
interrupt.
Signed-off-by: NAyaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/forcedeth.c

@@ -3440,25 +3440,22 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 
 		nv_msi_workaround(np);
 
+#ifdef CONFIG_FORCEDETH_NAPI
 		spin_lock(&np->lock);
-		nv_tx_done(dev, np->tx_ring_size);
-		spin_unlock(&np->lock);
+		napi_schedule(&np->napi);
 
-#ifdef CONFIG_FORCEDETH_NAPI
-		if (np->events & NVREG_IRQ_RX_ALL) {
-			spin_lock(&np->lock);
-			napi_schedule(&np->napi);
+		/* Disable furthur irq's
+		   (msix not enabled with napi) */
+		writel(0, base + NvRegIrqMask);
 
-			/* Disable furthur receive irq's */
-			np->irqmask &= ~NVREG_IRQ_RX_ALL;
+		spin_unlock(&np->lock);
 
-			if (np->msi_flags & NV_MSI_X_ENABLED)
-				writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
-			else
-				writel(np->irqmask, base + NvRegIrqMask);
-			spin_unlock(&np->lock);
-		}
+		return IRQ_HANDLED;
 #else
+		spin_lock(&np->lock);
+		nv_tx_done(dev, np->tx_ring_size);
+		spin_unlock(&np->lock);
+
 		if (nv_rx_process(dev, RX_WORK_PER_LOOP)) {
 			if (unlikely(nv_alloc_rx(dev))) {
 				spin_lock(&np->lock);
@@ -3467,7 +3464,7 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 				spin_unlock(&np->lock);
 			}
 		}
-#endif
+
 		if (unlikely(np->events & NVREG_IRQ_LINK)) {
 			spin_lock(&np->lock);
 			nv_link_irq(dev);
@@ -3513,7 +3510,7 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 			printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
 			break;
 		}
-
+#endif
 	}
 	dprintk(KERN_DEBUG "%s: nv_nic_irq completed\n", dev->name);
 
@@ -3548,25 +3545,22 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 
 		nv_msi_workaround(np);
 
+#ifdef CONFIG_FORCEDETH_NAPI
 		spin_lock(&np->lock);
-		nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
-		spin_unlock(&np->lock);
+		napi_schedule(&np->napi);
 
-#ifdef CONFIG_FORCEDETH_NAPI
-		if (np->events & NVREG_IRQ_RX_ALL) {
-			spin_lock(&np->lock);
-			napi_schedule(&np->napi);
+		/* Disable furthur irq's
+		   (msix not enabled with napi) */
+		writel(0, base + NvRegIrqMask);
 
-			/* Disable furthur receive irq's */
-			np->irqmask &= ~NVREG_IRQ_RX_ALL;
+		spin_unlock(&np->lock);
 
-			if (np->msi_flags & NV_MSI_X_ENABLED)
-				writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
-			else
-				writel(np->irqmask, base + NvRegIrqMask);
-			spin_unlock(&np->lock);
-		}
+		return IRQ_HANDLED;
 #else
+		spin_lock(&np->lock);
+		nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
+		spin_unlock(&np->lock);
+
 		if (nv_rx_process_optimized(dev, RX_WORK_PER_LOOP)) {
 			if (unlikely(nv_alloc_rx_optimized(dev))) {
 				spin_lock(&np->lock);
@@ -3575,7 +3569,7 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 				spin_unlock(&np->lock);
 			}
 		}
-#endif
+
 		if (unlikely(np->events & NVREG_IRQ_LINK)) {
 			spin_lock(&np->lock);
 			nv_link_irq(dev);
@@ -3622,7 +3616,7 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 			printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
 			break;
 		}
-
+#endif
 	}
 	dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized completed\n", dev->name);
 
@@ -3682,9 +3676,17 @@ static int nv_napi_poll(struct napi_struct *napi, int budget)
 	int pkts, retcode;
 
 	if (!nv_optimized(np)) {
+		spin_lock_irqsave(&np->lock, flags);
+		nv_tx_done(dev, np->tx_ring_size);
+		spin_unlock_irqrestore(&np->lock, flags);
+
 		pkts = nv_rx_process(dev, budget);
 		retcode = nv_alloc_rx(dev);
 	} else {
+		spin_lock_irqsave(&np->lock, flags);
+		nv_tx_done_optimized(dev, np->tx_ring_size);
+		spin_unlock_irqrestore(&np->lock, flags);
+
 		pkts = nv_rx_process_optimized(dev, budget);
 		retcode = nv_alloc_rx_optimized(dev);
 	}
@@ -3696,17 +3698,37 @@ static int nv_napi_poll(struct napi_struct *napi, int budget)
 		spin_unlock_irqrestore(&np->lock, flags);
 	}
 
+	if (unlikely(np->events & NVREG_IRQ_LINK)) {
+		spin_lock_irqsave(&np->lock, flags);
+		nv_link_irq(dev);
+		spin_unlock_irqrestore(&np->lock, flags);
+	}
+	if (unlikely(np->need_linktimer && time_after(jiffies, np->link_timeout))) {
+		spin_lock_irqsave(&np->lock, flags);
+		nv_linkchange(dev);
+		spin_unlock_irqrestore(&np->lock, flags);
+		np->link_timeout = jiffies + LINK_TIMEOUT;
+	}
+	if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
+		spin_lock_irqsave(&np->lock, flags);
+		if (!np->in_shutdown) {
+			np->nic_poll_irq = np->irqmask;
+			np->recover_error = 1;
+			mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
+		}
+		spin_unlock_irqrestore(&np->lock, flags);
+		__napi_complete(napi);
+		return pkts;
+	}
+
 	if (pkts < budget) {
-		/* re-enable receive interrupts */
+		/* re-enable interrupts
+		   (msix not enabled in napi) */
 		spin_lock_irqsave(&np->lock, flags);
 
 		__napi_complete(napi);
 
-		np->irqmask |= NVREG_IRQ_RX_ALL;
-		if (np->msi_flags & NV_MSI_X_ENABLED)
-			writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
-		else
-			writel(np->irqmask, base + NvRegIrqMask);
+		writel(np->irqmask, base + NvRegIrqMask);
 
 		spin_unlock_irqrestore(&np->lock, flags);
 	}