ionic: fill out pci error handlers

Set up the pci_error_handlers error_detected and resume to be useful in
handling AER events.  If the error detected is pci_channel_io_frozen we
set up to do an FLR at the end of the AER handling - this tends to clear
things up well enough that traffic can continue.  Else, let the AER/PCI
machinery do what is needed for the less serious errors seen.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 60e64ef043af3319434563259a0d000ec8293096..c49aa358e42444de33b3a3dd08832bf8f56af394 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -469,10 +469,35 @@ err_out:
                __func__, err ? "failed" : "done");
 }
 
+static pci_ers_result_t ionic_pci_error_detected(struct pci_dev *pdev,
+                                                pci_channel_state_t error)
+{
+       if (error == pci_channel_io_frozen) {
+               ionic_reset_prepare(pdev);
+               return PCI_ERS_RESULT_NEED_RESET;
+       }
+
+       return PCI_ERS_RESULT_NONE;
+}
+
+static void ionic_pci_error_resume(struct pci_dev *pdev)
+{
+       struct ionic *ionic = pci_get_drvdata(pdev);
+       struct ionic_lif *lif = ionic->lif;
+
+       if (lif && test_bit(IONIC_LIF_F_FW_RESET, lif->state))
+               pci_reset_function_locked(pdev);
+}
+
 static const struct pci_error_handlers ionic_err_handler = {
        /* FLR handling */
        .reset_prepare      = ionic_reset_prepare,
        .reset_done         = ionic_reset_done,
+
+       /* PCI bus error detected on this device */
+       .error_detected     = ionic_pci_error_detected,
+       .resume             = ionic_pci_error_resume,
+
 };
 
 static struct pci_driver ionic_driver = {