linux-kernel - [PATCH net-next v1 3/3] net: dsa: microchip: add pause stats support

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Date:   Fri, 24 Jun 2022 14:59:02 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Lukas Wunner <lukas@...ner.de>, UNGLinuxDriver@...rochip.com
Subject: [PATCH net-next v1 3/3] net: dsa: microchip: add pause stats support

Add support for pause specific stats.

Tested on ksz9477.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/net/dsa/microchip/ksz9477.c    |  1 +
 drivers/net/dsa/microchip/ksz_common.c | 19 +++++++++++++++++++
 drivers/net/dsa/microchip/ksz_common.h |  3 +++
 3 files changed, 23 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index ab40b700cf1a..8c31fb0fe1fd 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1351,6 +1351,7 @@ static const struct dsa_switch_ops ksz9477_switch_ops = {
 	.port_mirror_add	= ksz9477_port_mirror_add,
 	.port_mirror_del	= ksz9477_port_mirror_del,
 	.get_stats64		= ksz_get_stats64,
+	.get_pause_stats	= ksz_get_pause_stats,
 	.port_change_mtu	= ksz9477_change_mtu,
 	.port_max_mtu		= ksz9477_max_mtu,
 };
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 9ca8c8d7740f..1022affb45aa 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -461,12 +461,14 @@ EXPORT_SYMBOL_GPL(ksz_phylink_get_caps);
 
 void ksz_r_mib_stats64(struct ksz_device *dev, int port)
 {
+	struct ethtool_pause_stats *pstats;
 	struct rtnl_link_stats64 *stats;
 	struct ksz_stats_raw *raw;
 	struct ksz_port_mib *mib;
 
 	mib = &dev->ports[port].mib;
 	stats = &mib->stats64;
+	pstats = &mib->pause_stats;
 	raw = (struct ksz_stats_raw *)mib->counters;
 
 	spin_lock(&mib->stats64_lock);
@@ -498,6 +500,9 @@ void ksz_r_mib_stats64(struct ksz_device *dev, int port)
 	stats->multicast = raw->rx_mcast;
 	stats->collisions = raw->tx_total_col;
 
+	pstats->tx_pause_frames = raw->tx_pause;
+	pstats->rx_pause_frames = raw->rx_pause;
+
 	spin_unlock(&mib->stats64_lock);
 }
 EXPORT_SYMBOL_GPL(ksz_r_mib_stats64);
@@ -516,6 +521,20 @@ void ksz_get_stats64(struct dsa_switch *ds, int port,
 }
 EXPORT_SYMBOL_GPL(ksz_get_stats64);
 
+void ksz_get_pause_stats(struct dsa_switch *ds, int port,
+			 struct ethtool_pause_stats *pause_stats)
+{
+	struct ksz_device *dev = ds->priv;
+	struct ksz_port_mib *mib;
+
+	mib = &dev->ports[port].mib;
+
+	spin_lock(&mib->stats64_lock);
+	memcpy(pause_stats, &mib->pause_stats, sizeof(*pause_stats));
+	spin_unlock(&mib->stats64_lock);
+}
+EXPORT_SYMBOL_GPL(ksz_get_pause_stats);
+
 void ksz_get_strings(struct dsa_switch *ds, int port,
 		     u32 stringset, uint8_t *buf)
 {
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 8500eaedad67..5d81faf81c1b 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -25,6 +25,7 @@ struct ksz_port_mib {
 	u8 cnt_ptr;
 	u64 *counters;
 	struct rtnl_link_stats64 stats64;
+	struct ethtool_pause_stats pause_stats;
 	struct spinlock stats64_lock;
 };
 
@@ -200,6 +201,8 @@ void ksz_init_mib_timer(struct ksz_device *dev);
 void ksz_r_mib_stats64(struct ksz_device *dev, int port);
 void ksz_get_stats64(struct dsa_switch *ds, int port,
 		     struct rtnl_link_stats64 *s);
+void ksz_get_pause_stats(struct dsa_switch *ds, int port,
+			 struct ethtool_pause_stats *pause_stats);
 void ksz_phylink_get_caps(struct dsa_switch *ds, int port,
 			  struct phylink_config *config);
 extern const struct ksz_chip_data ksz_switch_chips[];
-- 
2.30.2