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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>
This commit is contained in:
Sunil Goutham 2015-07-29 16:49:43 +03:00 committed by David S. Miller
parent 74840b83bd
commit 3d7a8aaad8
2 changed files with 10 additions and 0 deletions
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9
drivers/net/ethernet/cavium/thunder/nic.h
View File

@ -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;

1
drivers/net/ethernet/cavium/thunder/nicvf_main.c
View File

@ -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);