Yinghai Lu
2007-12-29T22:11:20Z

[PATCH] forcedeth: seperate handler for msix and normal int.

so we don't need to keep checking np->msi_flags to see if NV_MSI_X_ENABLED is set in
handler

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>

Index: linux-2.6/drivers/net/forcedeth.c
===================================================================
--- linux-2.6.orig/drivers/net/forcedeth.c
+++ linux-2.6/drivers/net/forcedeth.c
@@ -2979,7 +2979,7 @@ static void nv_link_irq(struct net_devic
dprintk(KERN_DEBUG "%s: link change notification done.\n", dev->name);
}

-static irqreturn_t nv_nic_irq(int foo, void *data)
+static inline irqreturn_t nv_nic_irq_x(int foo, void *data, int msix)
{
struct net_device *dev = (struct net_device *) data;
struct fe_priv *np = netdev_priv(dev);
@@ -2990,7 +2990,7 @@ static irqreturn_t nv_nic_irq(int foo, v
dprintk(KERN_DEBUG "%s: nv_nic_irq\n", dev->name);

for (i=0; ; i++) {
- if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
+ if (!msix) {
events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
} else {
@@ -3013,7 +3013,7 @@ static irqreturn_t nv_nic_irq(int foo, v
spin_lock(&np->lock);
np->irqmask &= ~NVREG_IRQ_RX_ALL;

- if (np->msi_flags & NV_MSI_X_ENABLED)
+ if (msix)
writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3051,7 +3051,7 @@ static irqreturn_t nv_nic_irq(int foo, v
if (unlikely(events & NVREG_IRQ_RECOVER_ERROR)) {
spin_lock(&np->lock);
/* disable interrupts on the nic */
- if (!(np->msi_flags & NV_MSI_X_ENABLED))
+ if (!msix)
writel(0, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3068,7 +3068,7 @@ static irqreturn_t nv_nic_irq(int foo, v
if (unlikely(i > max_interrupt_work)) {
spin_lock(&np->lock);
/* disable interrupts on the nic */
- if (!(np->msi_flags & NV_MSI_X_ENABLED))
+ if (!msix)
writel(0, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3089,12 +3089,23 @@ static irqreturn_t nv_nic_irq(int foo, v
return IRQ_RETVAL(i);
}

+static irqreturn_t nv_nic_irq_msix(int foo, void *data)
+{
+ return nv_nic_irq_x(foo, data, 1);
+}
+
+static irqreturn_t nv_nic_irq_normal(int foo, void *data)
+{
+ return nv_nic_irq_x(foo, data, 0);
+}
+
+
/**
* All _optimized functions are used to help increase performance
* (reduce CPU and increase throughput). They use descripter version 3,
* compiler directives, and reduce memory accesses.
*/
-static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
+static inline irqreturn_t nv_nic_irq_optimized_x(int foo, void *data, int msix)
{
struct net_device *dev = (struct net_device *) data;
struct fe_priv *np = netdev_priv(dev);
@@ -3105,7 +3116,7 @@ static irqreturn_t nv_nic_irq_optimized(
dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized\n", dev->name);

for (i=0; ; i++) {
- if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
+ if (!msix) {
events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
} else {
@@ -3128,7 +3139,7 @@ static irqreturn_t nv_nic_irq_optimized(
spin_lock(&np->lock);
np->irqmask &= ~NVREG_IRQ_RX_ALL;

- if (np->msi_flags & NV_MSI_X_ENABLED)
+ if (msix)
writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3166,7 +3177,7 @@ static irqreturn_t nv_nic_irq_optimized(
if (unlikely(events & NVREG_IRQ_RECOVER_ERROR)) {
spin_lock(&np->lock);
/* disable interrupts on the nic */
- if (!(np->msi_flags & NV_MSI_X_ENABLED))
+ if (!msix)
writel(0, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3184,7 +3195,7 @@ static irqreturn_t nv_nic_irq_optimized(
if (unlikely(i > max_interrupt_work)) {
spin_lock(&np->lock);
/* disable interrupts on the nic */
- if (!(np->msi_flags & NV_MSI_X_ENABLED))
+ if (!msix)
writel(0, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
@@ -3205,6 +3216,16 @@ static irqreturn_t nv_nic_irq_optimized(
return IRQ_RETVAL(i);
}

+static irqreturn_t nv_nic_irq_optimized_msix(int foo, void *data)
+{
+ return nv_nic_irq_optimized_x(foo, data, 1);
+}
+
+static irqreturn_t nv_nic_irq_optimized_normal(int foo, void *data)
+{
+ return nv_nic_irq_optimized_x(foo, data, 0);
+}
+
static irqreturn_t nv_nic_irq_tx(int foo, void *data)
{
struct net_device *dev = (struct net_device *) data;
@@ -3503,9 +3524,9 @@ static int nv_request_irq(struct net_dev
handler = nv_nic_irq_test;
} else {
if (np->desc_ver == DESC_VER_3)
- handler = nv_nic_irq_optimized;
+ handler = nv_nic_irq_optimized_normal;
else
- handler = nv_nic_irq;
+ handler = nv_nic_irq_normal;
}

if (np->msi_flags & NV_MSI_X_CAPABLE) {
@@ -3543,6 +3564,13 @@ static int nv_request_irq(struct net_dev
set_msix_vector_map(dev, NV_MSI_X_VECTOR_TX, NVREG_IRQ_TX_ALL);
set_msix_vector_map(dev, NV_MSI_X_VECTOR_OTHER, NVREG_IRQ_OTHER);
} else {
+ if (!intr_test) {
+ if (np->desc_ver == DESC_VER_3)
+ handler = nv_nic_irq_optimized_msix;
+ else
+ handler = nv_nic_irq_msix;
+ }
+
/* Request irq for all interrupts */
if (request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector, handler, IRQF_SHARED, dev->name, dev) != 0) {
printk(KERN_INFO "forcedeth: request_irq failed %d\n", ret);
@@ -3689,10 +3717,17 @@ static void nv_do_nic_poll(unsigned long
pci_push(base);

if (!using_multi_irqs(dev)) {
- if (np->desc_ver == DESC_VER_3)
- nv_nic_irq_optimized(0, dev);
- else
- nv_nic_irq(0, dev);
+ if (np->msi_flags & NV_MSI_X_ENABLED) {
+ if (np->desc_ver == DESC_VER_3)
+ nv_nic_irq_optimized_msix(0, dev);
+ else
+ nv_nic_irq_msix(0, dev);
+ } else {
+ if (np->desc_ver == DESC_VER_3)
+ nv_nic_irq_optimized_normal(0, dev);
+ else
+ nv_nic_irq_normal(0, dev);
+ }
if (np->msi_flags & NV_MSI_X_ENABLED)
enable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
else