ixgbevf: Add suspend and resume support to the VF

This change adds PCI suspend and resume support to ixgbevf.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 89 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 60ef64587412..87f87d81addb 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -1867,6 +1867,22 @@ err_set_interrupt:
 }
 
 /**
+ * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
+ * @adapter: board private structure to clear interrupt scheme on
+ *
+ * We go through and clear interrupt specific resources and reset the structure
+ * to pre-load conditions
+ **/
+static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
+{
+        adapter->num_tx_queues = 0;
+        adapter->num_rx_queues = 0;
+
+        ixgbevf_free_q_vectors(adapter);
+        ixgbevf_reset_interrupt_capability(adapter);
+}
+
+/**
  * ixgbevf_sw_init - Initialize general software structures
  * (struct ixgbevf_adapter)
  * @adapter: board private structure to initialize
@@ -2889,23 +2905,85 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
         return 0;
 }
 
-static void ixgbevf_shutdown(struct pci_dev *pdev)
+static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
 {
         struct net_device *netdev = pci_get_drvdata(pdev);
         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+#ifdef CONFIG_PM
+        int retval = 0;
+#endif
 
         netif_device_detach(netdev);
 
         if (netif_running(netdev)) {
+                rtnl_lock();
                 ixgbevf_down(adapter);
                 ixgbevf_free_irq(adapter);
                 ixgbevf_free_all_tx_resources(adapter);
                 ixgbevf_free_all_rx_resources(adapter);
+                rtnl_unlock();
         }
 
-        pci_save_state(pdev);
+        ixgbevf_clear_interrupt_scheme(adapter);
+
+#ifdef CONFIG_PM
+        retval = pci_save_state(pdev);
+        if (retval)
+                return retval;
 
+#endif
         pci_disable_device(pdev);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int ixgbevf_resume(struct pci_dev *pdev)
+{
+        struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
+        struct net_device *netdev = adapter->netdev;
+        u32 err;
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_restore_state(pdev);
+        /*
+         * pci_restore_state clears dev->state_saved so call
+         * pci_save_state to restore it.
+         */
+        pci_save_state(pdev);
+
+        err = pci_enable_device_mem(pdev);
+        if (err) {
+                dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
+                return err;
+        }
+        pci_set_master(pdev);
+
+        rtnl_lock();
+        err = ixgbevf_init_interrupt_scheme(adapter);
+        rtnl_unlock();
+        if (err) {
+                dev_err(&pdev->dev, "Cannot initialize interrupts\n");
+                return err;
+        }
+
+        ixgbevf_reset(adapter);
+
+        if (netif_running(netdev)) {
+                err = ixgbevf_open(netdev);
+                if (err)
+                        return err;
+        }
+
+        netif_device_attach(netdev);
+
+        return err;
+}
+
+#endif /* CONFIG_PM */
+static void ixgbevf_shutdown(struct pci_dev *pdev)
+{
+        ixgbevf_suspend(pdev, PMSG_SUSPEND);
 }
 
 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
@@ -2946,7 +3024,7 @@ static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
         return stats;
 }
 
-static const struct net_device_ops ixgbe_netdev_ops = {
+static const struct net_device_ops ixgbevf_netdev_ops = {
         .ndo_open               = ixgbevf_open,
         .ndo_stop               = ixgbevf_close,
         .ndo_start_xmit         = ixgbevf_xmit_frame,
@@ -2962,7 +3040,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
 
 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
 {
-        dev->netdev_ops = &ixgbe_netdev_ops;
+        dev->netdev_ops = &ixgbevf_netdev_ops;
         ixgbevf_set_ethtool_ops(dev);
         dev->watchdog_timeo = 5 * HZ;
 }
@@ -3131,6 +3209,7 @@ static int __devinit ixgbevf_probe(struct pci_dev *pdev,
         return 0;
 
 err_register:
+        ixgbevf_clear_interrupt_scheme(adapter);
 err_sw_init:
         ixgbevf_reset_interrupt_capability(adapter);
         iounmap(hw->hw_addr);
@@ -3168,6 +3247,7 @@ static void __devexit ixgbevf_remove(struct pci_dev *pdev)
         if (netdev->reg_state == NETREG_REGISTERED)
                 unregister_netdev(netdev);
 
+        ixgbevf_clear_interrupt_scheme(adapter);
         ixgbevf_reset_interrupt_capability(adapter);
 
         iounmap(adapter->hw.hw_addr);
@@ -3267,6 +3347,11 @@ static struct pci_driver ixgbevf_driver = {
         .id_table = ixgbevf_pci_tbl,
         .probe    = ixgbevf_probe,
         .remove   = __devexit_p(ixgbevf_remove),
+#ifdef CONFIG_PM
+        /* Power Management Hooks */
+        .suspend  = ixgbevf_suspend,
+        .resume   = ixgbevf_resume,
+#endif
         .shutdown = ixgbevf_shutdown,
         .err_handler = &ixgbevf_err_handler
 };