[PATCH v1 iwl-next 1/2] igbvf: add lbtx_packets and lbtx_bytes to ethtool statistics

Currently ethtool shows lbrx_packets and lbrx_bytes (Good RX
Packets/Octets loopback Count), but doesn't show the TX-side equivalents
(lbtx_packets and lbtx_bytes). Add visibility of those missing
statistics by adding them to ethtool statistics.

In addition, the order of lbrx_bytes and lbrx_packets is not consistent
with non-loopback statistics (rx_packets, rx_bytes). Therefore, align
the order by swapping positions of lbrx_bytes and lbrx_packets.

Tested on Intel Corporation I350 Gigabit Network Connection.

Before:
  # ethtool -S ens5 | grep -E "x_(bytes|packets)"
       rx_packets: 135
       tx_packets: 106
       rx_bytes: 16010
       tx_bytes: 12451
       lbrx_bytes: 1148
       lbrx_packets: 12

After:
  # ethtool -S ens5 | grep -E "x_(bytes|packets)"
       rx_packets: 748
       tx_packets: 304
       rx_bytes: 81513
       tx_bytes: 33698
       lbrx_packets: 97
       lbtx_packets: 109
       lbrx_bytes: 12090
       lbtx_bytes: 12401

Tested-by: Kohei Enju <redacted>
Signed-off-by: Kohei Enju <redacted>
---
 drivers/net/ethernet/intel/igbvf/ethtool.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igbvf/ethtool.c b/drivers/net/ethernet/intel/igbvf/ethtool.c
index 773895c663fd..c6defc495f13 100644
--- a/drivers/net/ethernet/intel/igbvf/ethtool.c
+++ b/drivers/net/ethernet/intel/igbvf/ethtool.c

@@ -30,8 +30,10 @@ static const struct igbvf_stats igbvf_gstrings_stats[] = {
 	{ "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
 	{ "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
 	{ "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
-	{ "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
 	{ "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
+	{ "lbtx_packets", IGBVF_STAT(stats.gptlbc, stats.base_gptlbc) },
+	{ "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
+	{ "lbtx_bytes", IGBVF_STAT(stats.gotlbc, stats.base_gotlbc) },
 	{ "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
 	{ "tx_timeout_count", IGBVF_STAT(tx_timeout_count, zero_base) },
 	{ "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },

-- 
2.48.1