forcedeth: Kill NAPI config options.

All distributions enable it, therefore no significant body of users
are even testing the driver with it disabled.  And making NAPI
configurable is heavily discouraged anyways.

I left the MSI-X interrupt enabling thing in an "#if 0" block
so hopefully someone can debug that and it can get re-enabled.
Probably it was just one of the NVIDIA chipset MSI erratas that
we work handle these days in the PCI quirks (see drivers/pci/quirks.c
and stuff like nvenet_msi_disable()).

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 1 insertions, 207 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index dbd26f992158..b9e7618a1473 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1453,20 +1453,6 @@ config FORCEDETH
           To compile this driver as a module, choose M here. The module
           will be called forcedeth.
 
-config FORCEDETH_NAPI
-        bool "Use Rx Polling (NAPI) (EXPERIMENTAL)"
-        depends on FORCEDETH && EXPERIMENTAL
-        help
-          NAPI is a new driver API designed to reduce CPU and interrupt load
-          when the driver is receiving lots of packets from the card. It is
-          still somewhat experimental and thus not yet enabled by default.
-
-          If your estimated Rx load is 10kpps or more, or if the card will be
-          deployed on potentially unfriendly networks (e.g. in a firewall),
-          then say Y here.
-
-          If in doubt, say N.
-
 config CS89x0
         tristate "CS89x0 support"
         depends on NET_ETHERNET && (ISA || EISA || MACH_IXDP2351 \
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 4a24cc7d9555..f9e1dd48ac56 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -1104,20 +1104,16 @@ static void nv_disable_hw_interrupts(struct net_device *dev, u32 mask)
 
 static void nv_napi_enable(struct net_device *dev)
 {
-#ifdef CONFIG_FORCEDETH_NAPI
         struct fe_priv *np = get_nvpriv(dev);
 
         napi_enable(&np->napi);
-#endif
 }
 
 static void nv_napi_disable(struct net_device *dev)
 {
-#ifdef CONFIG_FORCEDETH_NAPI
         struct fe_priv *np = get_nvpriv(dev);
 
         napi_disable(&np->napi);
-#endif
 }
 
 #define MII_READ        (-1)
@@ -1810,7 +1806,6 @@ static int nv_alloc_rx_optimized(struct net_device *dev)
 }
 
 /* If rx bufs are exhausted called after 50ms to attempt to refresh */
-#ifdef CONFIG_FORCEDETH_NAPI
 static void nv_do_rx_refill(unsigned long data)
 {
         struct net_device *dev = (struct net_device *) data;
@@ -1819,41 +1814,6 @@ static void nv_do_rx_refill(unsigned long data)
         /* Just reschedule NAPI rx processing */
         napi_schedule(&np->napi);
 }
-#else
-static void nv_do_rx_refill(unsigned long data)
-{
-        struct net_device *dev = (struct net_device *) data;
-        struct fe_priv *np = netdev_priv(dev);
-        int retcode;
-
-        if (!using_multi_irqs(dev)) {
-                if (np->msi_flags & NV_MSI_X_ENABLED)
-                        disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
-                else
-                        disable_irq(np->pci_dev->irq);
-        } else {
-                disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
-        }
-        if (!nv_optimized(np))
-                retcode = nv_alloc_rx(dev);
-        else
-                retcode = nv_alloc_rx_optimized(dev);
-        if (retcode) {
-                spin_lock_irq(&np->lock);
-                if (!np->in_shutdown)
-                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
-                spin_unlock_irq(&np->lock);
-        }
-        if (!using_multi_irqs(dev)) {
-                if (np->msi_flags & NV_MSI_X_ENABLED)
-                        enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
-                else
-                        enable_irq(np->pci_dev->irq);
-        } else {
-                enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
-        }
-}
-#endif
 
 static void nv_init_rx(struct net_device *dev)
 {
@@ -2816,11 +2776,7 @@ static int nv_rx_process(struct net_device *dev, int limit)
                 skb->protocol = eth_type_trans(skb, dev);
                 dprintk(KERN_DEBUG "%s: nv_rx_process: %d bytes, proto %d accepted.\n",
                                         dev->name, len, skb->protocol);
-#ifdef CONFIG_FORCEDETH_NAPI
                 napi_gro_receive(&np->napi, skb);
-#else
-                netif_rx(skb);
-#endif
                 dev->stats.rx_packets++;
                 dev->stats.rx_bytes += len;
 next_pkt:
@@ -2909,27 +2865,14 @@ static int nv_rx_process_optimized(struct net_device *dev, int limit)
                                 dev->name, len, skb->protocol);
 
                         if (likely(!np->vlangrp)) {
-#ifdef CONFIG_FORCEDETH_NAPI
                                 napi_gro_receive(&np->napi, skb);
-#else
-                                netif_rx(skb);
-#endif
                         } else {
                                 vlanflags = le32_to_cpu(np->get_rx.ex->buflow);
                                 if (vlanflags & NV_RX3_VLAN_TAG_PRESENT) {
-#ifdef CONFIG_FORCEDETH_NAPI
                                         vlan_gro_receive(&np->napi, np->vlangrp,
                                                          vlanflags & NV_RX3_VLAN_TAG_MASK, skb);
-#else
-                                        vlan_hwaccel_rx(skb, np->vlangrp,
-                                                        vlanflags & NV_RX3_VLAN_TAG_MASK);
-#endif
                                 } else {
-#ifdef CONFIG_FORCEDETH_NAPI
                                         napi_gro_receive(&np->napi, skb);
-#else
-                                        netif_rx(skb);
-#endif
                                 }
                         }
 
@@ -3496,10 +3439,6 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
         struct net_device *dev = (struct net_device *) data;
         struct fe_priv *np = netdev_priv(dev);
         u8 __iomem *base = get_hwbase(dev);
-#ifndef CONFIG_FORCEDETH_NAPI
-        int total_work = 0;
-        int loop_count = 0;
-#endif
 
         dprintk(KERN_DEBUG "%s: nv_nic_irq\n", dev->name);
 
@@ -3516,7 +3455,6 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 
         nv_msi_workaround(np);
 
-#ifdef CONFIG_FORCEDETH_NAPI
         if (napi_schedule_prep(&np->napi)) {
                 /*
                  * Disable further irq's (msix not enabled with napi)
@@ -3525,65 +3463,6 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
                 __napi_schedule(&np->napi);
         }
 
-#else
-        do
-        {
-                int work = 0;
-                if ((work = nv_rx_process(dev, RX_WORK_PER_LOOP))) {
-                        if (unlikely(nv_alloc_rx(dev))) {
-                                spin_lock(&np->lock);
-                                if (!np->in_shutdown)
-                                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
-                                spin_unlock(&np->lock);
-                        }
-                }
-
-                spin_lock(&np->lock);
-                work += nv_tx_done(dev, TX_WORK_PER_LOOP);
-                spin_unlock(&np->lock);
-
-                if (!work)
-                        break;
-
-                total_work += work;
-
-                loop_count++;
-        }
-        while (loop_count < max_interrupt_work);
-
-        if (nv_change_interrupt_mode(dev, total_work)) {
-                /* setup new irq mask */
-                writel(np->irqmask, base + NvRegIrqMask);
-        }
-
-        if (unlikely(np->events & NVREG_IRQ_LINK)) {
-                spin_lock(&np->lock);
-                nv_link_irq(dev);
-                spin_unlock(&np->lock);
-        }
-        if (unlikely(np->need_linktimer && time_after(jiffies, np->link_timeout))) {
-                spin_lock(&np->lock);
-                nv_linkchange(dev);
-                spin_unlock(&np->lock);
-                np->link_timeout = jiffies + LINK_TIMEOUT;
-        }
-        if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
-                spin_lock(&np->lock);
-                /* disable interrupts on the nic */
-                if (!(np->msi_flags & NV_MSI_X_ENABLED))
-                        writel(0, base + NvRegIrqMask);
-                else
-                        writel(np->irqmask, base + NvRegIrqMask);
-                pci_push(base);
-
-                if (!np->in_shutdown) {
-                        np->nic_poll_irq = np->irqmask;
-                        np->recover_error = 1;
-                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
-                }
-                spin_unlock(&np->lock);
-        }
-#endif
         dprintk(KERN_DEBUG "%s: nv_nic_irq completed\n", dev->name);
 
         return IRQ_HANDLED;
@@ -3599,10 +3478,6 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
         struct net_device *dev = (struct net_device *) data;
         struct fe_priv *np = netdev_priv(dev);
         u8 __iomem *base = get_hwbase(dev);
-#ifndef CONFIG_FORCEDETH_NAPI
-        int total_work = 0;
-        int loop_count = 0;
-#endif
 
         dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized\n", dev->name);
 
@@ -3619,7 +3494,6 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 
         nv_msi_workaround(np);
 
-#ifdef CONFIG_FORCEDETH_NAPI
         if (napi_schedule_prep(&np->napi)) {
                 /*
                  * Disable further irq's (msix not enabled with napi)
@@ -3627,66 +3501,6 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
                 writel(0, base + NvRegIrqMask);
                 __napi_schedule(&np->napi);
         }
-#else
-        do
-        {
-                int work = 0;
-                if ((work = nv_rx_process_optimized(dev, RX_WORK_PER_LOOP))) {
-                        if (unlikely(nv_alloc_rx_optimized(dev))) {
-                                spin_lock(&np->lock);
-                                if (!np->in_shutdown)
-                                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
-                                spin_unlock(&np->lock);
-                        }
-                }
-
-                spin_lock(&np->lock);
-                work += nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
-                spin_unlock(&np->lock);
-
-                if (!work)
-                        break;
-
-                total_work += work;
-
-                loop_count++;
-        }
-        while (loop_count < max_interrupt_work);
-
-        if (nv_change_interrupt_mode(dev, total_work)) {
-                /* setup new irq mask */
-                writel(np->irqmask, base + NvRegIrqMask);
-        }
-
-        if (unlikely(np->events & NVREG_IRQ_LINK)) {
-                spin_lock(&np->lock);
-                nv_link_irq(dev);
-                spin_unlock(&np->lock);
-        }
-        if (unlikely(np->need_linktimer && time_after(jiffies, np->link_timeout))) {
-                spin_lock(&np->lock);
-                nv_linkchange(dev);
-                spin_unlock(&np->lock);
-                np->link_timeout = jiffies + LINK_TIMEOUT;
-        }
-        if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
-                spin_lock(&np->lock);
-                /* disable interrupts on the nic */
-                if (!(np->msi_flags & NV_MSI_X_ENABLED))
-                        writel(0, base + NvRegIrqMask);
-                else
-                        writel(np->irqmask, base + NvRegIrqMask);
-                pci_push(base);
-
-                if (!np->in_shutdown) {
-                        np->nic_poll_irq = np->irqmask;
-                        np->recover_error = 1;
-                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
-                }
-                spin_unlock(&np->lock);
-        }
-
-#endif
         dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized completed\n", dev->name);
 
         return IRQ_HANDLED;
@@ -3735,7 +3549,6 @@ static irqreturn_t nv_nic_irq_tx(int foo, void *data)
         return IRQ_RETVAL(i);
 }
 
-#ifdef CONFIG_FORCEDETH_NAPI
 static int nv_napi_poll(struct napi_struct *napi, int budget)
 {
         struct fe_priv *np = container_of(napi, struct fe_priv, napi);
@@ -3805,7 +3618,6 @@ static int nv_napi_poll(struct napi_struct *napi, int budget)
         }
         return rx_work;
 }
-#endif
 
 static irqreturn_t nv_nic_irq_rx(int foo, void *data)
 {
@@ -5711,9 +5523,7 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
                 np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
                 dev->features |= NETIF_F_TSO;
-#ifdef CONFIG_FORCEDETH_NAPI
                 dev->features |= NETIF_F_GRO;
-#endif
         }
 
         np->vlanctl_bits = 0;
@@ -5766,9 +5576,7 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
         else
                 dev->netdev_ops = &nv_netdev_ops_optimized;
 
-#ifdef CONFIG_FORCEDETH_NAPI
         netif_napi_add(dev, &np->napi, nv_napi_poll, RX_WORK_PER_LOOP);
-#endif
         SET_ETHTOOL_OPS(dev, &ops);
         dev->watchdog_timeo = NV_WATCHDOG_TIMEO;
 
@@ -5871,7 +5679,7 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
                 /* msix has had reported issues when modifying irqmask
                    as in the case of napi, therefore, disable for now
                 */
-#ifndef CONFIG_FORCEDETH_NAPI
+#if 0
                 np->msi_flags |= NV_MSI_X_CAPABLE;
 #endif
         }