[PATCH net 2/3] net: ethernet: ti: am65-cpsw: fix RX & TX statistics for XDP_TX case

[Roger Quadros <rogerq@xxxxxxxxxx>]

For successful XDP_TX and XDP_REDIRECT cases, the packet was received
successfully so update RX statistics. Use original received
packet length for that.

TX packets statistics are incremented on TX completion so don't
update it while TX queueing.

If xdp_convert_buff_to_frame() fails, increment tx_dropped.

Signed-off-by: Roger Quadros <rogerq@xxxxxxxxxx>
Fixes: 8acacc40f733 ("net: ethernet: ti: am65-cpsw: Add minimal XDP support")
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index e26c6dc02648..bee2d66b9ccf 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1170,9 +1170,11 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 	struct xdp_frame *xdpf;
 	struct bpf_prog *prog;
 	struct page *page;
+	int pkt_len;
 	u32 act;
 	int err;
 
+	pkt_len = *len;
 	prog = READ_ONCE(port->xdp_prog);
 	if (!prog)
 		return AM65_CPSW_XDP_PASS;
@@ -1190,8 +1192,10 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 		netif_txq = netdev_get_tx_queue(ndev, tx_chn->id);
 
 		xdpf = xdp_convert_buff_to_frame(xdp);
-		if (unlikely(!xdpf))
+		if (unlikely(!xdpf)) {
+			ndev->stats.tx_dropped++;
 			goto drop;
+		}
 
 		__netif_tx_lock(netif_txq, cpu);
 		err = am65_cpsw_xdp_tx_frame(ndev, tx_chn, xdpf,
@@ -1200,14 +1204,14 @@ static int am65_cpsw_run_xdp(struct am65_cpsw_rx_flow *flow,
 		if (err)
 			goto drop;
 
-		dev_sw_netstats_tx_add(ndev, 1, *len);
+		dev_sw_netstats_rx_add(ndev, pkt_len);
 		ret = AM65_CPSW_XDP_CONSUMED;
 		goto out;
 	case XDP_REDIRECT:
 		if (unlikely(xdp_do_redirect(ndev, xdp, prog)))
 			goto drop;
 
-		dev_sw_netstats_rx_add(ndev, *len);
+		dev_sw_netstats_rx_add(ndev, pkt_len);
 		ret = AM65_CPSW_XDP_REDIRECT;
 		goto out;
 	default:

-- 
2.34.1