net: mana: Add counter for XDP_TX

This counter will show up in ethtool stat. It is the
number of packets received and forwarded by XDP program.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microsoft/mana/mana.h

@@ -52,6 +52,7 @@ struct mana_stats_rx {
 	u64 packets;
 	u64 bytes;
 	u64 xdp_drop;
+	u64 xdp_tx;
 	struct u64_stats_sync syncp;
 };
 

drivers/net/ethernet/microsoft/mana/mana_en.c

@@ -1035,6 +1035,14 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
 			skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3);
 	}
 
+	u64_stats_update_begin(&rx_stats->syncp);
+	rx_stats->packets++;
+	rx_stats->bytes += pkt_len;
+
+	if (act == XDP_TX)
+		rx_stats->xdp_tx++;
+	u64_stats_update_end(&rx_stats->syncp);
+
 	if (act == XDP_TX) {
 		skb_set_queue_mapping(skb, rxq_idx);
 		mana_xdp_tx(skb, ndev);
@@ -1043,10 +1051,6 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
 
 	napi_gro_receive(napi, skb);
 
-	u64_stats_update_begin(&rx_stats->syncp);
-	rx_stats->packets++;
-	rx_stats->bytes += pkt_len;
-	u64_stats_update_end(&rx_stats->syncp);
 	return;
 
 drop_xdp:

drivers/net/ethernet/microsoft/mana/mana_ethtool.c

@@ -23,7 +23,7 @@ static int mana_get_sset_count(struct net_device *ndev, int stringset)
 	if (stringset != ETH_SS_STATS)
 		return -EINVAL;
 
-	return ARRAY_SIZE(mana_eth_stats) + num_queues * 5;
+	return ARRAY_SIZE(mana_eth_stats) + num_queues * 6;
 }
 
 static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
@@ -48,6 +48,8 @@ static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 		p += ETH_GSTRING_LEN;
 		sprintf(p, "rx_%d_xdp_drop", i);
 		p += ETH_GSTRING_LEN;
+		sprintf(p, "rx_%d_xdp_tx", i);
+		p += ETH_GSTRING_LEN;
 	}
 
 	for (i = 0; i < num_queues; i++) {
@@ -69,6 +71,7 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 	unsigned int start;
 	u64 packets, bytes;
 	u64 xdp_drop;
+	u64 xdp_tx;
 	int q, i = 0;
 
 	if (!apc->port_is_up)
@@ -85,11 +88,13 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 			packets = rx_stats->packets;
 			bytes = rx_stats->bytes;
 			xdp_drop = rx_stats->xdp_drop;
+			xdp_tx = rx_stats->xdp_tx;
 		} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
 
 		data[i++] = packets;
 		data[i++] = bytes;
 		data[i++] = xdp_drop;
+		data[i++] = xdp_tx;
 	}
 
 	for (q = 0; q < num_queues; q++) {