[PATCH net-next v11 08/10] bng_en: implement ndo_get_stats64

[Bhargava Marreddy <bhargava.marreddy@broadcom.com>]

Implement the ndo_get_stats64 callback to report aggregate network
statistics. The driver gathers these by accumulating the per-ring
counters into the provided rtnl_link_stats64 structure.

Signed-off-by: Bhargava Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
---
 .../net/ethernet/broadcom/bnge/bnge_netdev.c  | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
index 61bac71c7f74..9a5d667defea 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
@@ -2897,6 +2897,46 @@ static int bnge_shutdown_nic(struct bnge_net *bn)
 	return 0;
 }
 
+static void bnge_get_port_stats64(struct bnge_net *bn,
+				  struct rtnl_link_stats64 *stats)
+{
+	unsigned int start;
+	u64 *tx, *rx;
+
+	rx = bn->port_stats.sw_stats;
+	tx = bn->port_stats.sw_stats + BNGE_TX_PORT_STATS_BYTE_OFFSET / 8;
+
+	do {
+		start = u64_stats_fetch_begin(&bn->port_stats.syncp);
+
+		stats->rx_crc_errors =
+			BNGE_GET_RX_PORT_STATS64(rx, rx_fcs_err_frames);
+		stats->rx_frame_errors =
+			BNGE_GET_RX_PORT_STATS64(rx, rx_align_err_frames);
+		stats->rx_length_errors =
+			BNGE_GET_RX_PORT_STATS64(rx, rx_undrsz_frames) +
+			BNGE_GET_RX_PORT_STATS64(rx, rx_ovrsz_frames) +
+			BNGE_GET_RX_PORT_STATS64(rx, rx_runt_frames);
+		stats->rx_errors =
+			BNGE_GET_RX_PORT_STATS64(rx, rx_false_carrier_frames) +
+			BNGE_GET_RX_PORT_STATS64(rx, rx_jbr_frames);
+		stats->collisions =
+			BNGE_GET_TX_PORT_STATS64(tx, tx_total_collisions);
+		stats->tx_fifo_errors =
+			BNGE_GET_TX_PORT_STATS64(tx, tx_fifo_underruns);
+		stats->tx_errors = BNGE_GET_TX_PORT_STATS64(tx, tx_err);
+	} while (u64_stats_fetch_retry(&bn->port_stats.syncp, start));
+}
+
+static void bnge_get_stats64(struct net_device *dev,
+			     struct rtnl_link_stats64 *stats)
+{
+	struct bnge_net *bn = netdev_priv(dev);
+
+	if (bn->flags & BNGE_FLAG_PORT_STATS)
+		bnge_get_port_stats64(bn, stats);
+}
+
 static void bnge_close_core(struct bnge_net *bn)
 {
 	struct bnge_dev *bd = bn->bd;
@@ -2930,6 +2970,7 @@ static const struct net_device_ops bnge_netdev_ops = {
 	.ndo_open		= bnge_open,
 	.ndo_stop		= bnge_close,
 	.ndo_start_xmit		= bnge_start_xmit,
+	.ndo_get_stats64	= bnge_get_stats64,
 	.ndo_features_check	= bnge_features_check,
 };
 
-- 
2.47.3