From a79b559e99bea6e3284366265d1c63b28ff0ca2e Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Thu, 20 Jul 2023 12:08:16 -0700 Subject: [PATCH] ionic: add FLR recovery support Add support for the PCI reset handlers in order to manage an FLR event. Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- .../net/ethernet/pensando/ionic/ionic_bus_pci.c | 53 ++++++++++++++++++++++ drivers/net/ethernet/pensando/ionic/ionic_lif.c | 8 ++-- drivers/net/ethernet/pensando/ionic/ionic_lif.h | 5 ++ 3 files changed, 62 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c index bcce613..d6ce113 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c @@ -409,12 +409,65 @@ static void ionic_remove(struct pci_dev *pdev) ionic_devlink_free(ionic); } +static void ionic_reset_prepare(struct pci_dev *pdev) +{ + struct ionic *ionic = pci_get_drvdata(pdev); + struct ionic_lif *lif = ionic->lif; + + dev_dbg(ionic->dev, "%s: device stopping\n", __func__); + + del_timer_sync(&ionic->watchdog_timer); + cancel_work_sync(&lif->deferred.work); + + mutex_lock(&lif->queue_lock); + ionic_stop_queues_reconfig(lif); + ionic_txrx_free(lif); + ionic_lif_deinit(lif); + ionic_qcqs_free(lif); + mutex_unlock(&lif->queue_lock); + + ionic_dev_teardown(ionic); + ionic_clear_pci(ionic); + ionic_debugfs_del_dev(ionic); +} + +static void ionic_reset_done(struct pci_dev *pdev) +{ + struct ionic *ionic = pci_get_drvdata(pdev); + struct ionic_lif *lif = ionic->lif; + int err; + + err = ionic_setup_one(ionic); + if (err) + goto err_out; + + ionic_debugfs_add_sizes(ionic); + ionic_debugfs_add_lif(ionic->lif); + + err = ionic_restart_lif(lif); + if (err) + goto err_out; + + mod_timer(&ionic->watchdog_timer, jiffies + 1); + +err_out: + dev_dbg(ionic->dev, "%s: device recovery %s\n", + __func__, err ? "failed" : "done"); +} + +static const struct pci_error_handlers ionic_err_handler = { + /* FLR handling */ + .reset_prepare = ionic_reset_prepare, + .reset_done = ionic_reset_done, +}; + static struct pci_driver ionic_driver = { .name = IONIC_DRV_NAME, .id_table = ionic_id_table, .probe = ionic_probe, .remove = ionic_remove, .sriov_configure = ionic_sriov_configure, + .err_handler = &ionic_err_handler }; int ionic_bus_register_driver(void) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 2d03c1b..adc05f9 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -434,7 +434,7 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq) } } -static void ionic_qcqs_free(struct ionic_lif *lif) +void ionic_qcqs_free(struct ionic_lif *lif) { struct device *dev = lif->ionic->dev; struct ionic_qcq *adminqcq; @@ -1754,7 +1754,7 @@ static int ionic_set_mac_address(struct net_device *netdev, void *sa) return ionic_lif_addr_add(netdev_priv(netdev), mac); } -static void ionic_stop_queues_reconfig(struct ionic_lif *lif) +void ionic_stop_queues_reconfig(struct ionic_lif *lif) { /* Stop and clean the queues before reconfiguration */ netif_device_detach(lif->netdev); @@ -2009,7 +2009,7 @@ static void ionic_txrx_deinit(struct ionic_lif *lif) } } -static void ionic_txrx_free(struct ionic_lif *lif) +void ionic_txrx_free(struct ionic_lif *lif) { unsigned int i; @@ -3266,7 +3266,7 @@ static void ionic_lif_handle_fw_down(struct ionic_lif *lif) dev_info(ionic->dev, "FW Down: LIFs stopped\n"); } -static int ionic_restart_lif(struct ionic_lif *lif) +int ionic_restart_lif(struct ionic_lif *lif) { struct ionic *ionic = lif->ionic; int err; diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h index fd2ea67..457c241 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h @@ -325,6 +325,11 @@ void ionic_lif_deinit(struct ionic_lif *lif); int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr); int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr); +void ionic_stop_queues_reconfig(struct ionic_lif *lif); +void ionic_txrx_free(struct ionic_lif *lif); +void ionic_qcqs_free(struct ionic_lif *lif); +int ionic_restart_lif(struct ionic_lif *lif); + int ionic_lif_register(struct ionic_lif *lif); void ionic_lif_unregister(struct ionic_lif *lif); int ionic_lif_identify(struct ionic *ionic, u8 lif_type, -- 2.7.4