[PATCH net-next 14/15]bnx2x: Add PCIE EEH support
From: Eilon Greenstein <hidden>
Date: 2008-06-17 14:50:03
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add PCI recovery functions to the driver. The initial PCI state is also saved so the MSI state can be restored during PCI recovery. Signed-off-by: Wendy Xiong <redacted> Signed-off-by: Eilon Greenstein <redacted> --- drivers/net/bnx2x_main.c | 96 +++++++++++++++++++++++++++++++++++++++++++--- 1 files changed, 90 insertions(+), 6 deletions(-)
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index b9e5f5b..911669f 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c@@ -9989,13 +9989,97 @@ static int bnx2x_resume(struct pci_dev *pdev) return 0; } +/** + * bnx2x_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 bnx2x_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct bnx2x *bp = netdev_priv(dev); + + rtnl_lock(); + netif_device_detach(dev); + + if (netif_running(dev)) + bnx2x_nic_unload(bp, UNLOAD_CLOSE); + + pci_disable_device(pdev); + rtnl_unlock(); + + /* Request a slot slot reset. */ + return PCI_ERS_RESULT_NEED_RESET; +} + +/** + * bnx2x_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. + */ +static pci_ers_result_t bnx2x_io_slot_reset(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct bnx2x *bp = netdev_priv(dev); + + rtnl_lock(); + if (pci_enable_device(pdev)) { + dev_err(&pdev->dev, + "Cannot re-enable PCI device after reset.\n"); + rtnl_unlock(); + return PCI_ERS_RESULT_DISCONNECT; + } + + if (netif_running(dev)) + bnx2x_set_power_state(bp, PCI_D0); + + pci_set_master(pdev); + pci_restore_state(pdev); + rtnl_unlock(); + + return PCI_ERS_RESULT_RECOVERED; +} + +/** + * bnx2x_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 bnx2x_io_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct bnx2x *bp = netdev_priv(dev); + + rtnl_lock(); + + if (netif_running(dev)) + bnx2x_nic_load(bp, LOAD_OPEN); + netif_device_attach(dev); + + rtnl_unlock(); +} + +static struct pci_error_handlers bnx2x_err_handler = { + .error_detected = bnx2x_io_error_detected, + .slot_reset = bnx2x_io_slot_reset, + .resume = bnx2x_io_resume, +}; + static struct pci_driver bnx2x_pci_driver = { - .name = DRV_MODULE_NAME, - .id_table = bnx2x_pci_tbl, - .probe = bnx2x_init_one, - .remove = __devexit_p(bnx2x_remove_one), - .suspend = bnx2x_suspend, - .resume = bnx2x_resume, + .name = DRV_MODULE_NAME, + .id_table = bnx2x_pci_tbl, + .probe = bnx2x_init_one, + .remove = __devexit_p(bnx2x_remove_one), + .suspend = bnx2x_suspend, + .resume = bnx2x_resume, + .err_handler = &bnx2x_err_handler, }; static int __init bnx2x_init(void)
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1.5.3.2