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Message-Id: <1346390174-30449-8-git-send-email-jeffrey.t.kirsher@intel.com>
Date: Thu, 30 Aug 2012 22:16:13 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Alexander Duyck <alexander.h.duyck@...el.com>,
netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com,
Greg Rose <gregory.v.rose@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 7/8] ixgbevf: Add suspend and resume support to the VF
From: Alexander Duyck <alexander.h.duyck@...el.com>
This change adds PCI suspend and resume support to ixgbevf.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
Signed-off-by: Greg Rose <gregory.v.rose@...el.com>
Tested-by: Sibai Li <sibai.li@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 93 ++++++++++++++++++++++-
1 file 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 60ef645..87f87d8 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
};
--
1.7.11.4
--
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