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authorSunil Goutham <sgoutham@cavium.com>2015-07-29 16:49:43 +0300
committerDavid S. Miller <davem@davemloft.net>2015-07-29 23:52:32 -0700
commit3d7a8aaad8720edb301d40d4a9d7fa906c76ba34 (patch)
tree6af5878f42360abf458a630aad9f5bd5db811bcf /drivers/net
parent74840b83bd59ee51c591714470c6629ac18f424a (diff)
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net: thunderx: Set watchdog timeout value
If a txq (SQ) remains in stopped state after this timeout its considered as stuck and interface is reinited. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/cavium/thunder/nic.h9
-rw-r--r--drivers/net/ethernet/cavium/thunder/nicvf_main.c1
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h
index a0be076eba83..8aee250904ec 100644
--- a/drivers/net/ethernet/cavium/thunder/nic.h
+++ b/drivers/net/ethernet/cavium/thunder/nic.h
@@ -125,6 +125,15 @@
*/
#define NICPF_CLK_PER_INT_TICK 2
+/* Time to wait before we decide that a SQ is stuck.
+ *
+ * Since both pkt rx and tx notifications are done with same CQ,
+ * when packets are being received at very high rate (eg: L2 forwarding)
+ * then freeing transmitted skbs will be delayed and watchdog
+ * will kick in, resetting interface. Hence keeping this value high.
+ */
+#define NICVF_TX_TIMEOUT (50 * HZ)
+
struct nicvf_cq_poll {
u8 cq_idx; /* Completion queue index */
struct napi_struct napi;
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 422d46ec509d..abee2d7cedb5 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -1293,6 +1293,7 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->hw_features = netdev->features;
netdev->netdev_ops = &nicvf_netdev_ops;
+ netdev->watchdog_timeo = NICVF_TX_TIMEOUT;
INIT_WORK(&nic->reset_task, nicvf_reset_task);