net: stmmac: Add a counter for Split Header packets

Add a counter that increments each time a packet with split header is
received.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/common.h

@@ -75,6 +75,7 @@ struct stmmac_extra_stats {
 	unsigned long rx_missed_cntr;
 	unsigned long rx_overflow_cntr;
 	unsigned long rx_vlan;
+	unsigned long rx_split_hdr_pkt_n;
 	/* Tx/Rx IRQ error info */
 	unsigned long tx_undeflow_irq;
 	unsigned long tx_process_stopped_irq;

drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c

@@ -65,6 +65,7 @@ static const struct stmmac_stats stmmac_gstrings_stats[] = {
 	STMMAC_STAT(rx_missed_cntr),
 	STMMAC_STAT(rx_overflow_cntr),
 	STMMAC_STAT(rx_vlan),
+	STMMAC_STAT(rx_split_hdr_pkt_n),
 	/* Tx/Rx IRQ error info */
 	STMMAC_STAT(tx_undeflow_irq),
 	STMMAC_STAT(tx_process_stopped_irq),

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3503,6 +3503,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
 				len = hlen;
 
 				prefetch(page_address(buf->sec_page));
+				priv->xstats.rx_split_hdr_pkt_n++;
 			}
 
 			skb = napi_alloc_skb(&ch->rx_napi, len);