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bnx2: Add EEH PCI recovery. 

Add PCI recovery functions to the driver.  The initial pci state is
also saved so the the MSI state can be restored during PCI recovery.

Signed-off-by: Wendy Xiong <wendyx@us.ibm.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wendy Xiong 2008-05-16 22:18:21 -07:00 committed by David S. Miller
parent 9a120bc570
commit 6ff2da49c8
1 changed files with 88 additions and 0 deletions
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88
drivers/net/bnx2.c
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@ -7119,6 +7119,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
}
pci_set_master(pdev);
pci_save_state(pdev);
bp->pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
if (bp->pm_cap == 0) {
@ -7628,6 +7629,92 @@ 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");
rtnl_unlock();
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, 1);
}
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,
@ -7635,6 +7722,7 @@ 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)