[PATCH 6/7]: Revised [PATCH 31/42]: ethernet: add PCI error recovery to ixgb dev driver
From: linas (linas_at_austin.ibm.com)
Date: 11/07/05
- Previous message: Adam Litke: "[RFC 1/2] Hugetlb fault fixes and reorg"
- In reply to: linas: "[PATCH 1/7]: PCI revised [PATCH 16/42]: PCI: PCI Error reporting callbacks"
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Date: Mon, 7 Nov 2005 15:37:27 -0600 To: Greg KH <greg@kroah.com>
On Mon, Nov 07, 2005 at 01:57:27PM -0600, linas was heard to remark:
> On Mon, Nov 07, 2005 at 10:27:27AM -0800, Greg KH was heard to remark:
> > 3) realy strong typing that sparse can detect.
Replace-Subject: PCI Error Recovery: ixgb network device driver
Various PCI bus errors can be signaled by newer PCI controllers. This
patch adds the PCI error recovery callbacks to the intel ten-gigabit
ethernet ixgb device driver. The patch has been tested, and appears
to work well.
Signed-off-by: Linas Vepstas <linas@linas.org>
--
Index: linux-2.6.14-mm1/drivers/net/ixgb/ixgb_main.c
===================================================================
--- linux-2.6.14-mm1.orig/drivers/net/ixgb/ixgb_main.c 2005-11-07 13:55:25.431278896 -0600
+++ linux-2.6.14-mm1/drivers/net/ixgb/ixgb_main.c 2005-11-07 15:02:14.779406268 -0600
@@ -132,6 +132,16 @@
static void ixgb_netpoll(struct net_device *dev);
#endif
+static pers_result_t ixgb_io_error_detected (struct pci_dev *pdev, pci_channel_state_t state);
+static pers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
+static void ixgb_io_resume (struct pci_dev *pdev);
+
+static struct pci_error_handlers ixgb_err_handler = {
+ .error_detected = ixgb_io_error_detected,
+ .slot_reset = ixgb_io_slot_reset,
+ .resume = ixgb_io_resume,
+};
+
/* Exported from other modules */
extern void ixgb_check_options(struct ixgb_adapter *adapter);
@@ -141,6 +151,8 @@
.id_table = ixgb_pci_tbl,
.probe = ixgb_probe,
.remove = __devexit_p(ixgb_remove),
+ .err_handler = &ixgb_err_handler,
+
};
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
@@ -1654,8 +1666,16 @@
unsigned int i;
#endif
+#ifdef XXX_CONFIG_IXGB_EEH_RECOVERY
+ if(unlikely(icr==EEH_IO_ERROR_VALUE(4))) {
+ if (eeh_slot_is_isolated (adapter->pdev))
+ // disable_irq_nosync (adapter->pdev->irq);
+ return IRQ_NONE; /* Not our interrupt */
+ }
+#else
if(unlikely(!icr))
return IRQ_NONE; /* Not our interrupt */
+#endif /* CONFIG_IXGB_EEH_RECOVERY */
if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
mod_timer(&adapter->watchdog_timer, jiffies);
@@ -2125,4 +2145,70 @@
}
#endif
+/* -------------- PCI Error Recovery infrastructure ---------------- */
+/** ixgb_io_error_detected() is called when PCI error is detected */
+static pers_result_t ixgb_io_error_detected (struct pci_dev *pdev, pci_channel_state_t state)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct ixgb_adapter *adapter = netdev->priv;
+
+ if(netif_running(netdev))
+ ixgb_down(adapter, TRUE);
+
+ /* Request a slot reset. */
+ return PERS_RESULT_NEED_RESET;
+}
+
+/** ixgb_io_slot_reset is called after the pci bus has been reset.
+ * Restart the card from scratch.
+ * Implementation resembles the first-half of the
+ * ixgb_resume routine.
+ */
+static pers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct ixgb_adapter *adapter = netdev->priv;
+
+ if(pci_enable_device(pdev)) {
+ printk(KERN_ERR "ixgb: Cannot re-enable PCI device after reset.\n");
+ return PERS_RESULT_DISCONNECT;
+ }
+ pci_set_master(pdev);
+
+ /* Perform card reset only on one instance of the card */
+ if (0 != PCI_FUNC (pdev->devfn))
+ return PERS_RESULT_RECOVERED;
+
+ ixgb_reset(adapter);
+
+ return PERS_RESULT_RECOVERED;
+}
+
+/** ixgb_io_resume is called when the error recovery driver
+ * tells us that its OK to resume normal operation.
+ * Implementation resembles the second-half of the
+ * ixgb_resume routine.
+ */
+static void ixgb_io_resume (struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct ixgb_adapter *adapter = netdev->priv;
+
+ if(netif_running(netdev)) {
+ if(ixgb_up(adapter)) {
+ printk ("ixgb: can't bring device back up after reset\n");
+ return;
+ }
+ }
+
+ netif_device_attach(netdev);
+ if(netif_running(netdev))
+ mod_timer(&adapter->watchdog_timer, jiffies);
+
+ /* Reading all-ff's from the adapter will completely hose
+ * the counts and statistics. So just clear them out */
+ memset(&adapter->stats, 0, sizeof(struct ixgb_hw_stats));
+ ixgb_update_stats(adapter);
+}
+
/* ixgb_main.c */
-
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- Previous message: Adam Litke: "[RFC 1/2] Hugetlb fault fixes and reorg"
- In reply to: linas: "[PATCH 1/7]: PCI revised [PATCH 16/42]: PCI: PCI Error reporting callbacks"
- Next in thread: linas: "[PATCH: 5/7]: Revised: [PATCH 30/42]: ethernet: add PCI error recovery to e1000 dev driver"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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