qeth: add statistics for tx csum

Add statistics counter for software tx checksumming.
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_core.h

@@ -134,6 +134,7 @@ struct qeth_perf_stats {
 	unsigned int sg_skbs_rx;
 	unsigned int sg_frags_rx;
 	unsigned int sg_alloc_page_rx;
+	unsigned int tx_csum;
 };
 
 /* Routing stuff */

drivers/s390/net/qeth_core_main.c

@@ -4327,6 +4327,7 @@ static struct {
 /* 30 */{"tx count"},
 	{"tx do_QDIO time"},
 	{"tx do_QDIO count"},
+	{"tx csum"},
 };
 
 int qeth_core_get_stats_count(struct net_device *dev)
@@ -4378,6 +4379,7 @@ void qeth_core_get_ethtool_stats(struct net_device *dev,
 	data[30] = card->perf_stats.outbound_cnt;
 	data[31] = card->perf_stats.outbound_do_qdio_time;
 	data[32] = card->perf_stats.outbound_do_qdio_cnt;
+	data[33] = card->perf_stats.tx_csum;
 }
 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
 

drivers/s390/net/qeth_l2_main.c

@@ -707,8 +707,11 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	if ((large_send == QETH_LARGE_SEND_NO) &&
-	    (skb->ip_summed == CHECKSUM_PARTIAL))
+	    (skb->ip_summed == CHECKSUM_PARTIAL)) {
 		qeth_tx_csum(new_skb);
+		if (card->options.performance_stats)
+			card->perf_stats.tx_csum++;
+	}
 
 	if (card->info.type != QETH_CARD_TYPE_IQD)
 		rc = qeth_do_send_packet(card, queue, new_skb, hdr,

drivers/s390/net/qeth_l3_main.c

@@ -2711,8 +2711,11 @@ static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	if ((large_send == QETH_LARGE_SEND_NO) &&
-	    (new_skb->ip_summed == CHECKSUM_PARTIAL))
+	    (new_skb->ip_summed == CHECKSUM_PARTIAL)) {
 		qeth_tx_csum(new_skb);
+		if (card->options.performance_stats)
+			card->perf_stats.tx_csum++;
+	}
 
 	if (card->info.type != QETH_CARD_TYPE_IQD)
 		rc = qeth_do_send_packet(card, queue, new_skb, hdr,