igb: update ethtool stats to support multiqueue

Addesses problems seen earlier with igb driver not correctly reporting rx
and tx stats.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/igb/igb.h

@@ -158,6 +158,7 @@ struct igb_ring {
 	union {
 		/* TX */
 		struct {
+			struct igb_queue_stats tx_stats;
 			bool detect_tx_hung;
 		};
 		/* RX */

drivers/net/igb/igb_ethtool.c

@@ -96,10 +96,8 @@ static const struct igb_stats igb_gstrings_stats[] = {
 };
 
 #define IGB_QUEUE_STATS_LEN \
-	((((((struct igb_adapter *)netdev->priv)->num_rx_queues > 1) ? \
-	  ((struct igb_adapter *)netdev->priv)->num_rx_queues : 0) + \
-	 (((((struct igb_adapter *)netdev->priv)->num_tx_queues > 1) ? \
-	  ((struct igb_adapter *)netdev->priv)->num_tx_queues : 0))) * \
+	((((struct igb_adapter *)netdev->priv)->num_rx_queues + \
+	 ((struct igb_adapter *)netdev->priv)->num_tx_queues) * \
 	(sizeof(struct igb_queue_stats) / sizeof(u64)))
 #define IGB_GLOBAL_STATS_LEN	\
 	sizeof(igb_gstrings_stats) / sizeof(struct igb_stats)
@@ -1842,6 +1840,13 @@ static void igb_get_ethtool_stats(struct net_device *netdev,
 		data[i] = (igb_gstrings_stats[i].sizeof_stat ==
 			sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
 	}
+	for (j = 0; j < adapter->num_tx_queues; j++) {
+		int k;
+		queue_stat = (u64 *)&adapter->tx_ring[j].tx_stats;
+		for (k = 0; k < stat_count; k++)
+			data[i + k] = queue_stat[k];
+		i += k;
+	}
 	for (j = 0; j < adapter->num_rx_queues; j++) {
 		int k;
 		queue_stat = (u64 *)&adapter->rx_ring[j].rx_stats;

drivers/net/igb/igb_main.c

@@ -3431,6 +3431,8 @@ static bool igb_clean_tx_irq(struct igb_ring *tx_ring)
 	}
 	tx_ring->total_bytes += total_bytes;
 	tx_ring->total_packets += total_packets;
+	tx_ring->tx_stats.bytes += total_bytes;
+	tx_ring->tx_stats.packets += total_packets;
 	adapter->net_stats.tx_bytes += total_bytes;
 	adapter->net_stats.tx_packets += total_packets;
 	return retval;