From b45aa2f6192e34a837ebdbb3548039c24440bc04 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Mon, 25 Apr 2011 12:42:48 +0000 Subject: [PATCH] tg3: Add EEH support This patch adds EEH support to the tg3 driver. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Reviewed-by: Benjamin Li Signed-off-by: David S. Miller --- drivers/net/tg3.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index fb2139a80700..6bc43ed172b5 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -15395,6 +15395,8 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, pdev->dma_mask == DMA_BIT_MASK(32) ? 32 : ((u64)pdev->dma_mask) == DMA_BIT_MASK(40) ? 40 : 64); + pci_save_state(pdev); + return 0; err_out_apeunmap: @@ -15551,11 +15553,156 @@ static SIMPLE_DEV_PM_OPS(tg3_pm_ops, tg3_suspend, tg3_resume); #endif /* CONFIG_PM_SLEEP */ +/** + * tg3_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 tg3_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct tg3 *tp = netdev_priv(netdev); + pci_ers_result_t err = PCI_ERS_RESULT_NEED_RESET; + + netdev_info(netdev, "PCI I/O error detected\n"); + + rtnl_lock(); + + if (!netif_running(netdev)) + goto done; + + tg3_phy_stop(tp); + + tg3_netif_stop(tp); + + del_timer_sync(&tp->timer); + tp->tg3_flags2 &= ~TG3_FLG2_RESTART_TIMER; + + /* Want to make sure that the reset task doesn't run */ + cancel_work_sync(&tp->reset_task); + tp->tg3_flags &= ~TG3_FLAG_TX_RECOVERY_PENDING; + tp->tg3_flags2 &= ~TG3_FLG2_RESTART_TIMER; + + netif_device_detach(netdev); + + /* Clean up software state, even if MMIO is blocked */ + tg3_full_lock(tp, 0); + tg3_halt(tp, RESET_KIND_SHUTDOWN, 0); + tg3_full_unlock(tp); + +done: + if (state == pci_channel_io_perm_failure) + err = PCI_ERS_RESULT_DISCONNECT; + else + pci_disable_device(pdev); + + rtnl_unlock(); + + return err; +} + +/** + * tg3_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. + * At this point, the card has exprienced a hard reset, + * followed by fixups by BIOS, and has its config space + * set up identically to what it was at cold boot. + */ +static pci_ers_result_t tg3_io_slot_reset(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct tg3 *tp = netdev_priv(netdev); + pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT; + int err; + + rtnl_lock(); + + if (pci_enable_device(pdev)) { + netdev_err(netdev, "Cannot re-enable PCI device after reset.\n"); + goto done; + } + + pci_set_master(pdev); + pci_restore_state(pdev); + pci_save_state(pdev); + + if (!netif_running(netdev)) { + rc = PCI_ERS_RESULT_RECOVERED; + goto done; + } + + err = tg3_power_up(tp); + if (err) { + netdev_err(netdev, "Failed to restore register access.\n"); + goto done; + } + + rc = PCI_ERS_RESULT_RECOVERED; + +done: + rtnl_unlock(); + + return rc; +} + +/** + * tg3_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 tg3_io_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct tg3 *tp = netdev_priv(netdev); + int err; + + rtnl_lock(); + + if (!netif_running(netdev)) + goto done; + + tg3_full_lock(tp, 0); + tp->tg3_flags |= TG3_FLAG_INIT_COMPLETE; + err = tg3_restart_hw(tp, 1); + tg3_full_unlock(tp); + if (err) { + netdev_err(netdev, "Cannot restart hardware after reset.\n"); + goto done; + } + + netif_device_attach(netdev); + + tp->timer.expires = jiffies + tp->timer_offset; + add_timer(&tp->timer); + + tg3_netif_start(tp); + + tg3_phy_start(tp); + +done: + rtnl_unlock(); +} + +static struct pci_error_handlers tg3_err_handler = { + .error_detected = tg3_io_error_detected, + .slot_reset = tg3_io_slot_reset, + .resume = tg3_io_resume +}; + static struct pci_driver tg3_driver = { .name = DRV_MODULE_NAME, .id_table = tg3_pci_tbl, .probe = tg3_init_one, .remove = __devexit_p(tg3_remove_one), + .err_handler = &tg3_err_handler, .driver.pm = TG3_PM_OPS, };