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authorRon Mercer <ron.mercer@qlogic.com>2010-02-04 13:32:46 -0800
committerDavid S. Miller <davem@davemloft.net>2010-02-04 13:32:46 -0800
commit15c052fc7f4a1b3544602be8af77e31bba9261bf (patch)
tree07a0f4b0db1c04046fd5ec2fa41188ece18e8cd9 /drivers/net/qlge
parentf8f76db1db369f3a130ac3fd33e2eee5f1610d9c (diff)
qlge: Add watchdog timer.
Add periodic heartbeat register read to trigger the eeh recovery process. We see cases where an eeh error was injected and the slot was suspended. An asic access attempt is required to flush the recovery process, but without interrupts the process can stall. Adding this periodic register read causes the recovery process to begin. Signed-off-by: Ron Mercer <ron.mercer@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/qlge')
-rw-r--r--drivers/net/qlge/qlge.h1
-rw-r--r--drivers/net/qlge/qlge_main.c30
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h
index 780a38731bcc..ebfd17776b53 100644
--- a/drivers/net/qlge/qlge.h
+++ b/drivers/net/qlge/qlge.h
@@ -2145,6 +2145,7 @@ struct ql_adapter {
struct completion ide_completion;
struct nic_operations *nic_ops;
u16 device_id;
+ struct timer_list timer;
atomic_t lb_count;
};
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 7e000295f359..87a40d168b36 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -4574,6 +4574,21 @@ static const struct net_device_ops qlge_netdev_ops = {
.ndo_vlan_rx_kill_vid = qlge_vlan_rx_kill_vid,
};
+static void ql_timer(unsigned long data)
+{
+ struct ql_adapter *qdev = (struct ql_adapter *)data;
+ u32 var = 0;
+
+ var = ql_read32(qdev, STS);
+ if (pci_channel_offline(qdev->pdev)) {
+ QPRINTK(qdev, IFUP, ERR, "EEH STS = 0x%.08x.\n", var);
+ return;
+ }
+
+ qdev->timer.expires = jiffies + (5*HZ);
+ add_timer(&qdev->timer);
+}
+
static int __devinit qlge_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_entry)
{
@@ -4625,6 +4640,14 @@ static int __devinit qlge_probe(struct pci_dev *pdev,
pci_disable_device(pdev);
return err;
}
+ /* Start up the timer to trigger EEH if
+ * the bus goes dead
+ */
+ init_timer_deferrable(&qdev->timer);
+ qdev->timer.data = (unsigned long)qdev;
+ qdev->timer.function = ql_timer;
+ qdev->timer.expires = jiffies + (5*HZ);
+ add_timer(&qdev->timer);
ql_link_off(qdev);
ql_display_dev_info(ndev);
atomic_set(&qdev->lb_count, 0);
@@ -4645,6 +4668,8 @@ int ql_clean_lb_rx_ring(struct rx_ring *rx_ring, int budget)
static void __devexit qlge_remove(struct pci_dev *pdev)
{
struct net_device *ndev = pci_get_drvdata(pdev);
+ struct ql_adapter *qdev = netdev_priv(ndev);
+ del_timer_sync(&qdev->timer);
unregister_netdev(ndev);
ql_release_all(pdev);
pci_disable_device(pdev);
@@ -4757,6 +4782,8 @@ static void qlge_io_resume(struct pci_dev *pdev)
QPRINTK(qdev, IFUP, ERR,
"Device was not running prior to EEH.\n");
}
+ qdev->timer.expires = jiffies + (5*HZ);
+ add_timer(&qdev->timer);
netif_device_attach(ndev);
}
@@ -4773,6 +4800,7 @@ static int qlge_suspend(struct pci_dev *pdev, pm_message_t state)
int err;
netif_device_detach(ndev);
+ del_timer_sync(&qdev->timer);
if (netif_running(ndev)) {
err = ql_adapter_down(qdev);
@@ -4817,6 +4845,8 @@ static int qlge_resume(struct pci_dev *pdev)
return err;
}
+ qdev->timer.expires = jiffies + (5*HZ);
+ add_timer(&qdev->timer);
netif_device_attach(ndev);
return 0;