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ionic: fill out pci error handlers

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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>
This commit is contained in:
Shannon Nelson 2023-12-11 10:58:04 -08:00 committed by David S. Miller
parent ce66172d33
commit c3a910e1c4
1 changed files with 25 additions and 0 deletions
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25
drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
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@ -469,10 +469,35 @@ static void ionic_reset_done(struct pci_dev *pdev)
__func__, err ? "failed" : "done"); __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 = { static const struct pci_error_handlers ionic_err_handler = {
/* FLR handling */ /* FLR handling */
.reset_prepare = ionic_reset_prepare, .reset_prepare = ionic_reset_prepare,
.reset_done = ionic_reset_done, .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 = { static struct pci_driver ionic_driver = {