From 0a12761bcd5646691c5d16dd93df84d1b8849285 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 3 May 2010 23:33:05 -0700 Subject: [PATCH] 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 --- drivers/net/Kconfig | 14 --- drivers/net/forcedeth.c | 194 +--------------------------------------- 2 files changed, 1 insertion(+), 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 } -- GitLab