net/mlx4_en: Add physical RX/TX bytes/packets counters

Add physical RX/TX packets/bytes counters into ethtool output to monitor
all traffic that was received and transmitted on the port. These
counters are available only for none Virtual Function.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/en_ethtool.c

@@ -199,6 +199,10 @@ static const char main_strings[][ETH_GSTRING_LEN] = {
 	"rx_xdp_drop",
 	"rx_xdp_tx",
 	"rx_xdp_tx_full",
+
+	/* phy statistics */
+	"rx_packets_phy", "rx_bytes_phy",
+	"tx_packets_phy", "tx_bytes_phy",
 };
 
 static const char mlx4_en_test_names[][ETH_GSTRING_LEN]= {
@@ -411,6 +415,10 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev,
 		if (bitmap_iterator_test(&it))
 			data[index++] = ((unsigned long *)&priv->xdp_stats)[i];
 
+	for (i = 0; i < NUM_PHY_STATS; i++, bitmap_iterator_inc(&it))
+		if (bitmap_iterator_test(&it))
+			data[index++] = ((unsigned long *)&priv->phy_stats)[i];
+
 	for (i = 0; i < priv->tx_ring_num[TX]; i++) {
 		data[index++] = priv->tx_ring[TX][i]->packets;
 		data[index++] = priv->tx_ring[TX][i]->bytes;
@@ -490,6 +498,12 @@ static void mlx4_en_get_strings(struct net_device *dev,
 				strcpy(data + (index++) * ETH_GSTRING_LEN,
 				       main_strings[strings]);
 
+		for (i = 0; i < NUM_PHY_STATS; i++, strings++,
+		     bitmap_iterator_inc(&it))
+			if (bitmap_iterator_test(&it))
+				strcpy(data + (index++) * ETH_GSTRING_LEN,
+				       main_strings[strings]);
+
 		for (i = 0; i < priv->tx_ring_num[TX]; i++) {
 			sprintf(data + (index++) * ETH_GSTRING_LEN,
 				"tx%d_packets", i);

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

@@ -3256,6 +3256,10 @@ void mlx4_en_set_stats_bitmap(struct mlx4_dev *dev,
 
 	bitmap_set(stats_bitmap->bitmap, last_i, NUM_XDP_STATS);
 	last_i += NUM_XDP_STATS;
+
+	if (!mlx4_is_slave(dev))
+		bitmap_set(stats_bitmap->bitmap, last_i, NUM_PHY_STATS);
+	last_i += NUM_PHY_STATS;
 }
 
 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,

drivers/net/ethernet/mellanox/mlx4/en_port.c

@@ -275,19 +275,31 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
 		priv->port_stats.xmit_more         += READ_ONCE(ring->xmit_more);
 	}
 
-	if (mlx4_is_master(mdev->dev)) {
-		stats->rx_packets = en_stats_adder(&mlx4_en_stats->RTOT_prio_0,
+	if (!mlx4_is_slave(mdev->dev)) {
+		struct mlx4_en_phy_stats *p_stats = &priv->phy_stats;
+
+		p_stats->rx_packets_phy =
+			en_stats_adder(&mlx4_en_stats->RTOT_prio_0,
 				       &mlx4_en_stats->RTOT_prio_1,
 				       NUM_PRIORITIES);
-		stats->tx_packets = en_stats_adder(&mlx4_en_stats->TTOT_prio_0,
+		p_stats->tx_packets_phy =
+			en_stats_adder(&mlx4_en_stats->TTOT_prio_0,
 				       &mlx4_en_stats->TTOT_prio_1,
 				       NUM_PRIORITIES);
-		stats->rx_bytes = en_stats_adder(&mlx4_en_stats->ROCT_prio_0,
+		p_stats->rx_bytes_phy =
+			en_stats_adder(&mlx4_en_stats->ROCT_prio_0,
 				       &mlx4_en_stats->ROCT_prio_1,
 				       NUM_PRIORITIES);
-		stats->tx_bytes = en_stats_adder(&mlx4_en_stats->TOCT_prio_0,
+		p_stats->tx_bytes_phy =
+			en_stats_adder(&mlx4_en_stats->TOCT_prio_0,
 				       &mlx4_en_stats->TOCT_prio_1,
 				       NUM_PRIORITIES);
+		if (mlx4_is_master(mdev->dev)) {
+			stats->rx_packets = p_stats->rx_packets_phy;
+			stats->tx_packets = p_stats->tx_packets_phy;
+			stats->rx_bytes = p_stats->rx_bytes_phy;
+			stats->tx_bytes = p_stats->tx_bytes_phy;
+		}
 	}
 
 	/* net device stats */

drivers/net/ethernet/mellanox/mlx4/mlx4_en.h

@@ -608,6 +608,7 @@ struct mlx4_en_priv {
 	struct mlx4_en_flow_stats_tx tx_flowstats;
 	struct mlx4_en_port_stats port_stats;
 	struct mlx4_en_xdp_stats xdp_stats;
+	struct mlx4_en_phy_stats phy_stats;
 	struct mlx4_en_stats_bitmap stats_bitmap;
 	struct list_head mc_list;
 	struct list_head curr_list;

drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h

@@ -63,6 +63,14 @@ struct mlx4_en_xdp_stats {
 #define NUM_XDP_STATS		3
 };
 
+struct mlx4_en_phy_stats {
+	unsigned long rx_packets_phy;
+	unsigned long rx_bytes_phy;
+	unsigned long tx_packets_phy;
+	unsigned long tx_bytes_phy;
+#define NUM_PHY_STATS		4
+};
+
 #define NUM_MAIN_STATS	21
 
 #define MLX4_NUM_PRIORITIES	8
@@ -116,7 +124,7 @@ enum {
 
 #define NUM_ALL_STATS	(NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PKT_STATS + \
 			 NUM_FLOW_STATS + NUM_PERF_STATS + NUM_PF_STATS + \
-			 NUM_XDP_STATS)
+			 NUM_XDP_STATS + NUM_PHY_STATS)
 
 #define MLX4_FIND_NETDEV_STAT(n) (offsetof(struct net_device_stats, n) / \
 				  sizeof(((struct net_device_stats *)0)->n))