netdev - [PATCH v10 net-next 6/8] net: ena: View PHC stats using debugfs

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Message-ID: <20250522134839.1336-7-darinzon@amazon.com>
Date: Thu, 22 May 2025 16:48:37 +0300
From: David Arinzon <darinzon@...zon.com>
To: David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	<netdev@...r.kernel.org>
CC: David Arinzon <darinzon@...zon.com>, Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, "Richard
 Cochran" <richardcochran@...il.com>, "Woodhouse, David" <dwmw@...zon.com>,
	"Machulsky, Zorik" <zorik@...zon.com>, "Matushevsky, Alexander"
	<matua@...zon.com>, Saeed Bshara <saeedb@...zon.com>, "Wilson, Matt"
	<msw@...zon.com>, "Liguori, Anthony" <aliguori@...zon.com>, "Bshara, Nafea"
	<nafea@...zon.com>, "Schmeilin, Evgeny" <evgenys@...zon.com>, "Belgazal,
 Netanel" <netanel@...zon.com>, "Saidi, Ali" <alisaidi@...zon.com>,
	"Herrenschmidt, Benjamin" <benh@...zon.com>, "Kiyanovski, Arthur"
	<akiyano@...zon.com>, "Dagan, Noam" <ndagan@...zon.com>, "Bernstein, Amit"
	<amitbern@...zon.com>, "Agroskin, Shay" <shayagr@...zon.com>, "Ostrovsky,
 Evgeny" <evostrov@...zon.com>, "Tabachnik, Ofir" <ofirt@...zon.com>,
	"Machnikowski, Maciek" <maciek@...hnikowski.net>, Rahul Rameshbabu
	<rrameshbabu@...dia.com>, Gal Pressman <gal@...dia.com>, Vadim Fedorenko
	<vadim.fedorenko@...ux.dev>, Andrew Lunn <andrew@...n.ch>, Leon Romanovsky
	<leon@...nel.org>
Subject: [PATCH v10 net-next 6/8] net: ena: View PHC stats using debugfs

Add an entry named `phc_stats` to view the PHC statistics.
If PHC is enabled, the stats are printed, as below:

phc_cnt: 0
phc_exp: 0
phc_skp: 0
phc_err_dv: 0
phc_err_ts: 0

If PHC is disabled, no statistics will be displayed.

Signed-off-by: David Arinzon <darinzon@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_debugfs.c | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_debugfs.c b/drivers/net/ethernet/amazon/ena/ena_debugfs.c
index d9327cd8..46ed8098 100644
--- a/drivers/net/ethernet/amazon/ena/ena_debugfs.c
+++ b/drivers/net/ethernet/amazon/ena/ena_debugfs.c
@@ -8,6 +8,35 @@
 #include <linux/seq_file.h>
 #include <linux/pci.h>
 #include "ena_debugfs.h"
+#include "ena_phc.h"
+
+static int phc_stats_show(struct seq_file *file, void *priv)
+{
+	struct ena_adapter *adapter = file->private;
+
+	if (!ena_phc_is_active(adapter))
+		return 0;
+
+	seq_printf(file,
+		   "phc_cnt: %llu\n",
+		   adapter->ena_dev->phc.stats.phc_cnt);
+	seq_printf(file,
+		   "phc_exp: %llu\n",
+		   adapter->ena_dev->phc.stats.phc_exp);
+	seq_printf(file,
+		   "phc_skp: %llu\n",
+		   adapter->ena_dev->phc.stats.phc_skp);
+	seq_printf(file,
+		   "phc_err_dv: %llu\n",
+		   adapter->ena_dev->phc.stats.phc_err_dv);
+	seq_printf(file,
+		   "phc_err_ts: %llu\n",
+		   adapter->ena_dev->phc.stats.phc_err_ts);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(phc_stats);
 
 void ena_debugfs_init(struct net_device *dev)
 {
@@ -15,6 +44,12 @@ void ena_debugfs_init(struct net_device *dev)
 
 	adapter->debugfs_base =
 		debugfs_create_dir(dev_name(&adapter->pdev->dev), NULL);
+
+	debugfs_create_file("phc_stats",
+			    0400,
+			    adapter->debugfs_base,
+			    adapter,
+			    &phc_stats_fops);
 }
 
 void ena_debugfs_terminate(struct net_device *dev)
-- 
2.47.1