netdev - Re: [ PATCH 1/1 2.6.25-rc9] bnx2: Add EEH support in bnx2 driver

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Message-Id: <1208983008.7339.24.camel@wendyx.austin.ibm.com>
Date:	Wed, 23 Apr 2008 15:36:48 -0500
From:	wendy xiong <wendyx@...ibm.com>
To:	Michael Chan <mchan@...adcom.com>
Cc:	netdev <netdev@...r.kernel.org>, jeff@...zik.org,
	David Miller <davem@...emloft.net>
Subject: Re: [ PATCH 1/1 2.6.25-rc9] bnx2: Add EEH support in bnx2 driver -
	Resending

Hi Michael,

Thanks!
I am re-sending patch with rtnl_lock()/rtnl_unlock().

Thanks,
Wendy

diff -Nuarp linux-2.6.25-rc9.orig/drivers/net/bnx2.c linux-2.6.25-rc9.eeh/drivers/net/bnx2.c
--- linux-2.6.25-rc9.orig/drivers/net/bnx2.c    2008-04-18 22:12:53.000000000 -0500
+++ linux-2.6.25-rc9.eeh/drivers/net/bnx2.c     2008-04-23 15:08:40.000000000 -0500
@@ -7108,6 +7108,7 @@ bnx2_init_board(struct pci_dev *pdev, st
        }

        pci_set_master(pdev);
+       pci_save_state(pdev);

        bp->pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
        if (bp->pm_cap == 0) {
@@ -7617,6 +7618,91 @@ bnx2_resume(struct pci_dev *pdev)
        return 0;
 }

+/**
+ * bnx2_io_error_detected - called when PCI error is detected
+ * @pdev: Pointer to PCI device
+ * @state: The current pci connection state
+ *
+ * This function is called after a PCI bus error affecting
+ * this device has been detected.
+ */
+static pci_ers_result_t bnx2_io_error_detected(struct pci_dev *pdev,
+                                               pci_channel_state_t state)
+{
+       struct net_device *dev = pci_get_drvdata(pdev);
+       struct bnx2 *bp = netdev_priv(dev);
+
+       rtnl_lock();
+       netif_device_detach(dev);
+
+       if (netif_running(dev)) {
+               bnx2_netif_stop(bp);
+               del_timer_sync(&bp->timer);
+               bnx2_reset_nic(bp, BNX2_DRV_MSG_CODE_RESET);
+       }
+
+       pci_disable_device(pdev);
+       rtnl_unlock();
+
+       /* Request a slot slot reset. */
+       return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * bnx2_io_slot_reset - called after the pci bus has been reset.
+ * @pdev: Pointer to PCI device
+ *
+ * Restart the card from scratch, as if from a cold-boot.
+ */
+static pci_ers_result_t bnx2_io_slot_reset(struct pci_dev *pdev)
+{
+       struct net_device *dev = pci_get_drvdata(pdev);
+       struct bnx2 *bp = netdev_priv(dev);
+
+       rtnl_lock();
+       if (pci_enable_device(pdev)) {
+               dev_err(&pdev->dev,
+                       "Cannot re-enable PCI device after reset.\n");
+               return PCI_ERS_RESULT_DISCONNECT;
+       }
+       pci_set_master(pdev);
+       pci_restore_state(pdev);
+
+       if (netif_running(dev)) {
+               bnx2_set_power_state(bp, PCI_D0);
+               bnx2_init_nic(bp);
+       }
+
+       rtnl_unlock();
+       return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * bnx2_io_resume - called when traffic can start flowing again.
+ * @pdev: Pointer to PCI device
+ *
+ * This callback is called when the error recovery driver tells us that
+ * its OK to resume normal operation.
+ */
+static void bnx2_io_resume(struct pci_dev *pdev)
+{
+       struct net_device *dev = pci_get_drvdata(pdev);
+       struct bnx2 *bp = netdev_priv(dev);
+
+       rtnl_lock();
+       if (netif_running(dev))
+               bnx2_netif_start(bp);
+
+       netif_device_attach(dev);
+       rtnl_unlock();
+}
+
+static struct pci_error_handlers bnx2_err_handler = {
+       .error_detected = bnx2_io_error_detected,
+       .slot_reset = bnx2_io_slot_reset,
+       .resume = bnx2_io_resume,
+};
+
 static struct pci_driver bnx2_pci_driver = {
        .name           = DRV_MODULE_NAME,
        .id_table       = bnx2_pci_tbl,
@@ -7624,6 +7710,7 @@ static struct pci_driver bnx2_pci_driver
        .remove         = __devexit_p(bnx2_remove_one),
        .suspend        = bnx2_suspend,
        .resume         = bnx2_resume,
+       .err_handler    = &bnx2_err_handler,
 };
 
 static int __init bnx2_init(void)


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