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authorAyaz Abdulla <aabdulla@nvidia.com>2009-03-05 08:02:14 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-10 05:29:48 -0700
commitf27e6f39fc37f378f5485b9a0ff905796e789f80 (patch)
tree0f0632bc4a8a1f92daa432cfae36df0355494856 /drivers/net/forcedeth.c
parent33912e72d00c3627dbbb7c59463df9535176059f (diff)
downloadop-kernel-dev-f27e6f39fc37f378f5485b9a0ff905796e789f80.zip
op-kernel-dev-f27e6f39fc37f378f5485b9a0ff905796e789f80.tar.gz
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: Ayaz Abdulla <aabdulla@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/forcedeth.c')
-rw-r--r--drivers/net/forcedeth.c98
1 files changed, 60 insertions, 38 deletions
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 78c2fe1..6b67654 100644
--- a/drivers/net/forcedeth.c
+++ b/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);
}
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