From: Sameeh Jubran <sameehj@amazon.com>
Date: Thu, 10 Sep 2020 13:07:13 +0000
Subject: net: ena: xdp: add queue counters for xdp actions
Patch-mainline: v5.10-rc1
Git-commit: 4cd28b214d561e9882923919bfd4a73afb980ec9
References: bsc#1177397

When using XDP every ingress packet is passed to an eBPF (xdp) program
which returns an action for this packet.

This patch adds counters for the number of times each such action was
received. It also counts all the invalid actions received from the eBPF
program.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c |    5 +++++
 drivers/net/ethernet/amazon/ena/ena_netdev.c  |   21 ++++++++++++++++++---
 drivers/net/ethernet/amazon/ena/ena_netdev.h  |    5 +++++
 3 files changed, 28 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -116,6 +116,11 @@ static const struct ena_stats ena_stats_
 	ENA_STAT_RX_ENTRY(bad_req_id),
 	ENA_STAT_RX_ENTRY(empty_rx_ring),
 	ENA_STAT_RX_ENTRY(csum_unchecked),
+	ENA_STAT_RX_ENTRY(xdp_aborted),
+	ENA_STAT_RX_ENTRY(xdp_drop),
+	ENA_STAT_RX_ENTRY(xdp_pass),
+	ENA_STAT_RX_ENTRY(xdp_tx),
+	ENA_STAT_RX_ENTRY(xdp_invalid),
 };
 
 static const struct ena_stats ena_stats_ena_com_strings[] = {
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -369,6 +369,7 @@ static int ena_xdp_execute(struct ena_ri
 {
 	struct bpf_prog *xdp_prog;
 	u32 verdict = XDP_PASS;
+	u64 *xdp_stat;
 
 	rcu_read_lock();
 	xdp_prog = READ_ONCE(rx_ring->xdp_bpf_prog);
@@ -378,17 +379,31 @@ static int ena_xdp_execute(struct ena_ri
 
 	verdict = bpf_prog_run_xdp(xdp_prog, xdp);
 
-	if (verdict == XDP_TX)
+	if (verdict == XDP_TX) {
 		ena_xdp_xmit_buff(rx_ring->netdev,
 				  xdp,
 				  rx_ring->qid + rx_ring->adapter->num_io_queues,
 				  rx_info);
-	else if (unlikely(verdict == XDP_ABORTED))
+
+		xdp_stat = &rx_ring->rx_stats.xdp_tx;
+	} else if (unlikely(verdict == XDP_ABORTED)) {
 		trace_xdp_exception(rx_ring->netdev, xdp_prog, verdict);
-	else if (unlikely(verdict > XDP_TX))
+		xdp_stat = &rx_ring->rx_stats.xdp_aborted;
+	} else if (unlikely(verdict == XDP_DROP)) {
+		xdp_stat = &rx_ring->rx_stats.xdp_drop;
+	} else if (unlikely(verdict == XDP_PASS)) {
+		xdp_stat = &rx_ring->rx_stats.xdp_pass;
+	} else {
 		bpf_warn_invalid_xdp_action(verdict);
+		xdp_stat = &rx_ring->rx_stats.xdp_invalid;
+	}
+
+	u64_stats_update_begin(&rx_ring->syncp);
+	(*xdp_stat)++;
+	u64_stats_update_end(&rx_ring->syncp);
 out:
 	rcu_read_unlock();
+
 	return verdict;
 }
 
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -266,6 +266,11 @@ struct ena_stats_rx {
 	u64 bad_req_id;
 	u64 empty_rx_ring;
 	u64 csum_unchecked;
+	u64 xdp_aborted;
+	u64 xdp_drop;
+	u64 xdp_pass;
+	u64 xdp_tx;
+	u64 xdp_invalid;
 };
 
 struct ena_ring {