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e1000e: add netpoll support for MSI/MSI-X IRQ modes 

With enabling CONFIG_PCI_MSI, e1000e could work in MSI/MSI-X IRQ mode,
and netpoll controller didn't deal with those IRQ modes on e1000e.

This patch add the handling MSI/MSI-X IRQ modes to netpoll controller,
so that netconsole could work with those IRQ modes.

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Dongdong Deng 2010-11-16 19:50:15 -08:00 committed by Jeff Kirsher
parent 1b98c2bb63
commit 147b2c8cb4
1 changed files with 45 additions and 4 deletions
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49
drivers/net/e1000e/netdev.c
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@ -5465,6 +5465,36 @@ static void e1000_shutdown(struct pci_dev *pdev)
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static irqreturn_t e1000_intr_msix(int irq, void *data)
{
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev_priv(netdev);
int vector, msix_irq;
if (adapter->msix_entries) {
vector = 0;
msix_irq = adapter->msix_entries[vector].vector;
disable_irq(msix_irq);
e1000_intr_msix_rx(msix_irq, netdev);
enable_irq(msix_irq);
vector++;
msix_irq = adapter->msix_entries[vector].vector;
disable_irq(msix_irq);
e1000_intr_msix_tx(msix_irq, netdev);
enable_irq(msix_irq);
vector++;
msix_irq = adapter->msix_entries[vector].vector;
disable_irq(msix_irq);
e1000_msix_other(msix_irq, netdev);
enable_irq(msix_irq);
}
return IRQ_HANDLED;
}
/*
* Polling 'interrupt' - used by things like netconsole to send skbs
* without having to re-enable interrupts. It's not called while
@ -5474,10 +5504,21 @@ static void e1000_netpoll(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev);
enable_irq(adapter->pdev->irq);
switch (adapter->int_mode) {
case E1000E_INT_MODE_MSIX:
e1000_intr_msix(adapter->pdev->irq, netdev);
break;
case E1000E_INT_MODE_MSI:
disable_irq(adapter->pdev->irq);
e1000_intr_msi(adapter->pdev->irq, netdev);
enable_irq(adapter->pdev->irq);
break;
default: /* E1000E_INT_MODE_LEGACY */
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev);
enable_irq(adapter->pdev->irq);
break;
}
}
#endif