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>

1 files changed, 45 insertions, 4 deletions

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index a6d54e460001..9b3f0a996b00 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -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