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igc: Add pcie error handler support

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Add pcie error detection, slot reset and resume capability

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin 2020-01-29 16:30:07 +02:00 committed by Jeff Kirsher
parent a5136f7677
commit bc23aa949a
1 changed files with 103 additions and 0 deletions
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103
drivers/net/ethernet/intel/igc/igc_main.c
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@ -5076,6 +5076,108 @@ static void igc_shutdown(struct pci_dev *pdev)
} }
} }
/**
* igc_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 igc_io_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct igc_adapter *adapter = netdev_priv(netdev);
netif_device_detach(netdev);
if (state == pci_channel_io_perm_failure)
return PCI_ERS_RESULT_DISCONNECT;
if (netif_running(netdev))
igc_down(adapter);
pci_disable_device(pdev);
/* Request a slot reset. */
return PCI_ERS_RESULT_NEED_RESET;
}
/**
* igc_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. Implementation
* resembles the first-half of the igc_resume routine.
**/
static pci_ers_result_t igc_io_slot_reset(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct igc_adapter *adapter = netdev_priv(netdev);
struct igc_hw *hw = &adapter->hw;
pci_ers_result_t result;
if (pci_enable_device_mem(pdev)) {
dev_err(&pdev->dev,
"Could not re-enable PCI device after reset.\n");
result = PCI_ERS_RESULT_DISCONNECT;
} else {
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
pci_enable_wake(pdev, PCI_D3hot, 0);
pci_enable_wake(pdev, PCI_D3cold, 0);
/* In case of PCI error, adapter loses its HW address
* so we should re-assign it here.
*/
hw->hw_addr = adapter->io_addr;
igc_reset(adapter);
wr32(IGC_WUS, ~0);
result = PCI_ERS_RESULT_RECOVERED;
}
return result;
}
/**
* igc_io_resume - called when traffic can start to flow again.
* @pdev: Pointer to PCI device
*
* This callback is called when the error recovery driver tells us that
* its OK to resume normal operation. Implementation resembles the
* second-half of the igc_resume routine.
*/
static void igc_io_resume(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct igc_adapter *adapter = netdev_priv(netdev);
rtnl_lock();
if (netif_running(netdev)) {
if (igc_open(netdev)) {
dev_err(&pdev->dev, "igc_open failed after reset\n");
return;
}
}
netif_device_attach(netdev);
/* let the f/w know that the h/w is now under the control of the
* driver.
*/
igc_get_hw_control(adapter);
rtnl_unlock();
}
static const struct pci_error_handlers igc_err_handler = {
.error_detected = igc_io_error_detected,
.slot_reset = igc_io_slot_reset,
.resume = igc_io_resume,
};
#ifdef CONFIG_PM #ifdef CONFIG_PM
static const struct dev_pm_ops igc_pm_ops = { static const struct dev_pm_ops igc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(igc_suspend, igc_resume) SET_SYSTEM_SLEEP_PM_OPS(igc_suspend, igc_resume)
@ -5093,6 +5195,7 @@ static struct pci_driver igc_driver = {
.driver.pm = &igc_pm_ops, .driver.pm = &igc_pm_ops,
#endif #endif
.shutdown = igc_shutdown, .shutdown = igc_shutdown,
.err_handler = &igc_err_handler,
}; };
/** /**