cxgb4: add per rx-queue counter for packet errors

print per rx-queue packet errors in sge_qinfo
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

@@ -692,6 +692,7 @@ struct sge_eth_stats {              /* Ethernet queue statistics */
 	unsigned long rx_cso;       /* # of Rx checksum offloads */
 	unsigned long vlan_ex;      /* # of Rx VLAN extractions */
 	unsigned long rx_drops;     /* # of packets dropped due to no mem */
+	unsigned long bad_rx_pkts;  /* # of packets with err_vec!=0 */
 };
 
 struct sge_eth_rxq {                /* SW Ethernet Rx queue */

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

@@ -2784,6 +2784,7 @@ do { \
 		RL("LROmerged:", stats.lro_merged);
 		RL("LROpackets:", stats.lro_pkts);
 		RL("RxDrops:", stats.rx_drops);
+		RL("RxBadPkts:", stats.bad_rx_pkts);
 		TL("TSO:", tso);
 		TL("TxCSO:", tx_cso);
 		TL("VLANins:", vlan_ins);

drivers/net/ethernet/chelsio/cxgb4/sge.c

@@ -2830,6 +2830,10 @@ int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
 
 	csum_ok = pkt->csum_calc && !err_vec &&
 		  (q->netdev->features & NETIF_F_RXCSUM);
+
+	if (err_vec)
+		rxq->stats.bad_rx_pkts++;
+
 	if (((pkt->l2info & htonl(RXF_TCP_F)) ||
 	     tnl_hdr_len) &&
 	    (q->netdev->features & NETIF_F_GRO) && csum_ok && !pkt->ip_frag) {