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Date: Tue, 17 Jun 2008 17:49:48 +0300
From: "Eilon Greenstein" <eilong@...adcom.com>
To: "David Miller" <davem@...emloft.net>,
netdev <netdev@...r.kernel.org>
cc: "Michael Chan" <mchan@...adcom.com>,
"Wendy Xiong" <wendyx@...ibm.com>
Subject: [PATCH net-next 14/15]bnx2x: Add PCIE EEH support
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 <wendyx@...ibm.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
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)
--
1.5.3.2
--
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