From: Sunil Goutham <sgout...@cavium.com>
If a txq (SQ) remains in stopped state after this timeout its
considered as stuck and interface is reinited.
Signed-off-by: Sunil Goutham <sgout...@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.maka...@caviumnetworks.com>
---
drivers/net/ethernet/cavium/thunder/nic.h | 9 +++++++++
drivers/net/ethernet/cavium/thunder/nicvf_main.c | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/net/ethernet/cavium/thunder/nic.h
b/drivers/net/ethernet/cavium/thunder/nic.h
index a0be076..8aee250 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 422d46e..abee2d7 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);
--
2.4.6
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