From b67874ac1604cda8070d60d432e892c09d761b2e Mon Sep 17 00:00:00 2001 From: Ayaz Abdulla Date: Thu, 5 Mar 2009 08:02:22 +0000 Subject: [PATCH] forcedeth: remove isr processing loop This patch is only a subset of changes so that it is easier to see the modifications. This patch removes the isr 'for' loop and shifts all the logic to account for new tab spacing. Signed-off-by: Ayaz Abdulla Signed-off-by: David S. Miller --- drivers/net/forcedeth.c | 252 +++++++++++++++++----------------------- 1 file changed, 105 insertions(+), 147 deletions(-) diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index 07e245dab680..2c3a7f851f20 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -3423,99 +3423,78 @@ 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); - int i; dprintk(KERN_DEBUG "%s: nv_nic_irq\n", dev->name); - for (i=0; ; i++) { - if (!(np->msi_flags & NV_MSI_X_ENABLED)) { - np->events = readl(base + NvRegIrqStatus); - writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus); - } else { - np->events = readl(base + NvRegMSIXIrqStatus); - writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus); - } - dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events); - if (!(np->events & np->irqmask)) - break; + if (!(np->msi_flags & NV_MSI_X_ENABLED)) { + np->events = readl(base + NvRegIrqStatus); + writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus); + } else { + np->events = readl(base + NvRegMSIXIrqStatus); + writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus); + } + dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events); + if (!(np->events & np->irqmask)) + return IRQ_NONE; - nv_msi_workaround(np); + nv_msi_workaround(np); #ifdef CONFIG_FORCEDETH_NAPI - spin_lock(&np->lock); - napi_schedule(&np->napi); + spin_lock(&np->lock); + napi_schedule(&np->napi); - /* Disable furthur irq's - (msix not enabled with napi) */ - writel(0, base + NvRegIrqMask); + /* Disable furthur irq's + (msix not enabled with napi) */ + writel(0, base + NvRegIrqMask); - spin_unlock(&np->lock); + spin_unlock(&np->lock); - return IRQ_HANDLED; + 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); - if (!np->in_shutdown) - mod_timer(&np->oom_kick, jiffies + OOM_REFILL); - spin_unlock(&np->lock); - } - } + spin_lock(&np->lock); + nv_tx_done(dev, np->tx_ring_size); + spin_unlock(&np->lock); - if (unlikely(np->events & NVREG_IRQ_LINK)) { + if (nv_rx_process(dev, RX_WORK_PER_LOOP)) { + if (unlikely(nv_alloc_rx(dev))) { 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); + if (!np->in_shutdown) + mod_timer(&np->oom_kick, jiffies + OOM_REFILL); 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); - break; - } - if (unlikely(i > max_interrupt_work)) { - 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 (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; - mod_timer(&np->nic_poll, jiffies + POLL_WAIT); - } - spin_unlock(&np->lock); - printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i); - break; + if (!np->in_shutdown) { + np->nic_poll_irq = np->irqmask; + np->recover_error = 1; + mod_timer(&np->nic_poll, jiffies + POLL_WAIT); } -#endif + spin_unlock(&np->lock); } +#endif dprintk(KERN_DEBUG "%s: nv_nic_irq completed\n", dev->name); - return IRQ_RETVAL(i); + return IRQ_HANDLED; } /** @@ -3528,100 +3507,79 @@ 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); - int i; dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized\n", dev->name); - for (i=0; ; i++) { - if (!(np->msi_flags & NV_MSI_X_ENABLED)) { - np->events = readl(base + NvRegIrqStatus); - writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus); - } else { - np->events = readl(base + NvRegMSIXIrqStatus); - writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus); - } - dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events); - if (!(np->events & np->irqmask)) - break; + if (!(np->msi_flags & NV_MSI_X_ENABLED)) { + np->events = readl(base + NvRegIrqStatus); + writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus); + } else { + np->events = readl(base + NvRegMSIXIrqStatus); + writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus); + } + dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events); + if (!(np->events & np->irqmask)) + return IRQ_NONE; - nv_msi_workaround(np); + nv_msi_workaround(np); #ifdef CONFIG_FORCEDETH_NAPI - spin_lock(&np->lock); - napi_schedule(&np->napi); + spin_lock(&np->lock); + napi_schedule(&np->napi); - /* Disable furthur irq's - (msix not enabled with napi) */ - writel(0, base + NvRegIrqMask); + /* Disable furthur irq's + (msix not enabled with napi) */ + writel(0, base + NvRegIrqMask); - spin_unlock(&np->lock); + spin_unlock(&np->lock); - return IRQ_HANDLED; + 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); - if (!np->in_shutdown) - mod_timer(&np->oom_kick, jiffies + OOM_REFILL); - spin_unlock(&np->lock); - } - } + spin_lock(&np->lock); + nv_tx_done_optimized(dev, TX_WORK_PER_LOOP); + spin_unlock(&np->lock); - if (unlikely(np->events & NVREG_IRQ_LINK)) { + if (nv_rx_process_optimized(dev, RX_WORK_PER_LOOP)) { + if (unlikely(nv_alloc_rx_optimized(dev))) { 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); - } + if (!np->in_shutdown) + mod_timer(&np->oom_kick, jiffies + OOM_REFILL); spin_unlock(&np->lock); - break; } + } - if (unlikely(i > max_interrupt_work)) { - 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 (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; - mod_timer(&np->nic_poll, jiffies + POLL_WAIT); - } - spin_unlock(&np->lock); - printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i); - break; + if (!np->in_shutdown) { + np->nic_poll_irq = np->irqmask; + np->recover_error = 1; + mod_timer(&np->nic_poll, jiffies + POLL_WAIT); } -#endif + spin_unlock(&np->lock); } + +#endif dprintk(KERN_DEBUG "%s: nv_nic_irq_optimized completed\n", dev->name); - return IRQ_RETVAL(i); + return IRQ_HANDLED; } static irqreturn_t nv_nic_irq_tx(int foo, void *data) -- 2.39.5