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Date: Fri, 16 Nov 2007 11:21:55 -0800
From: Divy Le Ray <divy@...lsio.com>
To: jeff@...zik.org
Cc: davem@...emloft.net, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, swise@...ngridcomputing.com,
wenxiong@...ibm.com
Subject: [PATCH 4/9] cxgb3 - Add EEH support
From: Divy Le Ray <divy@...lsio.com>
Add PCI recovery support
Signed-off-by: Divy Le Ray <divy@...lsio.com>
---
drivers/net/cxgb3/cxgb3_main.c | 107 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 107 insertions(+), 0 deletions(-)
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 9d14652..1b9a711 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -2316,6 +2316,112 @@ void t3_fatal_err(struct adapter *adapter)
}
+/**
+ * t3_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 t3_io_error_detected(struct pci_dev *pdev,
+ pci_channel_state_t state)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+ int i;
+
+ /* Stop all ports */
+ for_each_port(adapter, i) {
+ struct net_device *netdev = adapter->port[i];
+
+ if (netif_running(netdev))
+ cxgb_close(netdev);
+ }
+
+ if (is_offload(adapter) &&
+ test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map))
+ offload_close(&adapter->tdev);
+
+ /* Free sge resources */
+ t3_free_sge_resources(adapter);
+
+ adapter->flags &= ~FULL_INIT_DONE;
+
+ pci_disable_device(pdev);
+
+ /* Request a slot slot reset. */
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * t3_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 t3_io_slot_reset(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+
+ if (pci_enable_device(pdev)) {
+ dev_err(&pdev->dev,
+ "Cannot re-enable PCI device after reset.\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+ pci_set_master(pdev);
+
+ t3_prep_adapter(adapter, adapter->params.info, 1);
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * t3_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 t3_io_resume(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+ int i;
+
+ /* Restart the ports */
+ for_each_port(adapter, i) {
+ struct net_device *netdev = adapter->port[i];
+
+ if (netif_running(netdev)) {
+ if (cxgb_open(netdev)) {
+ dev_err(&pdev->dev,
+ "can't bring device back up"
+ " after reset\n");
+ continue;
+ }
+ netif_device_attach(netdev);
+ }
+ }
+
+ if (is_offload(adapter)) {
+ __set_bit(OFFLOAD_DEVMAP_BIT, &adapter->registered_device_map);
+ if (offload_open(dev))
+ printk(KERN_WARNING
+ "Could not bring back offload capabilities\n");
+ }
+}
+
+static struct pci_error_handlers t3_err_handler = {
+ .error_detected = t3_io_error_detected,
+ .slot_reset = t3_io_slot_reset,
+ .resume = t3_io_resume,
+};
+
static int __devinit cxgb_enable_msix(struct adapter *adap)
{
struct msix_entry entries[SGE_QSETS + 1];
@@ -2616,6 +2722,7 @@ static struct pci_driver driver = {
.id_table = cxgb3_pci_tbl,
.probe = init_one,
.remove = __devexit_p(remove_one),
+ .err_handler = &t3_err_handler,
};
static int __init cxgb3_init_module(void)
-
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