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

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Message-ID: <1208996602.6194.26.camel@dell>
Date:	Wed, 23 Apr 2008 17:23:22 -0700
From:	"Michael Chan" <mchan@...adcom.com>
To:	"wendy xiong" <wendyx@...ibm.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

On Wed, 2008-04-23 at 15:36 -0500, wendy xiong wrote:

> 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");

Need rtnl_unlock() here.

> +               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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