[RFC Patch net-next 2/5] net: dsa: microchip: add eth ctrl grouping for ethtool statistics

[Rakesh Sankaranarayanan <rakesh.sankaranarayanan@microchip.com>]

Add support for ethtool standard device statistics grouping. Support
ethernet mac ctrl statistics grouping using eth-ctrl groups parameter
in ethtool command.

Signed-off-by: Rakesh Sankaranarayanan <rakesh.sankaranarayanan@microchip.com>
---
 drivers/net/dsa/microchip/ksz_common.c  | 13 ++++++++
 drivers/net/dsa/microchip/ksz_common.h  |  2 ++
 drivers/net/dsa/microchip/ksz_ethtool.c | 42 +++++++++++++++++++++++++
 drivers/net/dsa/microchip/ksz_ethtool.h |  4 +++
 4 files changed, 61 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 7a9d7ef818a7..9b13a38d553d 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -159,6 +159,7 @@ static const struct ksz_dev_ops ksz8_dev_ops = {
 	.freeze_mib = ksz8_freeze_mib,
 	.port_init_cnt = ksz8_port_init_cnt,
 	.get_rmon_stats = ksz8_get_rmon_stats,
+	.get_eth_ctrl_stats = ksz8_get_eth_ctrl_stats,
 	.fdb_dump = ksz8_fdb_dump,
 	.mdb_add = ksz8_mdb_add,
 	.mdb_del = ksz8_mdb_del,
@@ -197,6 +198,7 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.freeze_mib = ksz9477_freeze_mib,
 	.port_init_cnt = ksz9477_port_init_cnt,
 	.get_rmon_stats = ksz9477_get_rmon_stats,
+	.get_eth_ctrl_stats = ksz9477_get_eth_ctrl_stats,
 	.vlan_filtering = ksz9477_port_vlan_filtering,
 	.vlan_add = ksz9477_port_vlan_add,
 	.vlan_del = ksz9477_port_vlan_del,
@@ -234,6 +236,7 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
 	.freeze_mib = ksz9477_freeze_mib,
 	.port_init_cnt = ksz9477_port_init_cnt,
 	.get_rmon_stats = ksz9477_get_rmon_stats,
+	.get_eth_ctrl_stats = ksz9477_get_eth_ctrl_stats,
 	.vlan_filtering = ksz9477_port_vlan_filtering,
 	.vlan_add = ksz9477_port_vlan_add,
 	.vlan_del = ksz9477_port_vlan_del,
@@ -1623,6 +1626,15 @@ static void ksz_get_rmon_stats(struct dsa_switch *ds, int port,
 		dev->dev_ops->get_rmon_stats(dev, port, rmon_stats, ranges);
 }
 
+static void ksz_get_eth_ctrl_stats(struct dsa_switch *ds, int port,
+				   struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+	struct ksz_device *dev = ds->priv;
+
+	if (dev->dev_ops->get_eth_ctrl_stats)
+		dev->dev_ops->get_eth_ctrl_stats(dev, port, ctrl_stats);
+}
+
 static void ksz_get_strings(struct dsa_switch *ds, int port,
 			    u32 stringset, uint8_t *buf)
 {
@@ -2874,6 +2886,7 @@ static const struct dsa_switch_ops ksz_switch_ops = {
 	.get_stats64		= ksz_get_stats64,
 	.get_pause_stats	= ksz_get_pause_stats,
 	.get_rmon_stats		= ksz_get_rmon_stats,
+	.get_eth_ctrl_stats	= ksz_get_eth_ctrl_stats,
 	.port_change_mtu	= ksz_change_mtu,
 	.port_max_mtu		= ksz_max_mtu,
 };
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index ad6d196d2927..07627ff1a749 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -342,6 +342,8 @@ struct ksz_dev_ops {
 	void (*get_rmon_stats)(struct ksz_device *dev, int port,
 			       struct ethtool_rmon_stats *rmon_stats,
 			       const struct ethtool_rmon_hist_range **ranges);
+	void (*get_eth_ctrl_stats)(struct ksz_device *dev, int port,
+				   struct ethtool_eth_ctrl_stats *ctrl_stats);
 };
 
 struct ksz_device *ksz_switch_alloc(struct device *base, void *priv);
diff --git a/drivers/net/dsa/microchip/ksz_ethtool.c b/drivers/net/dsa/microchip/ksz_ethtool.c
index 7e1f1b4d1e98..4c9ca21e1806 100644
--- a/drivers/net/dsa/microchip/ksz_ethtool.c
+++ b/drivers/net/dsa/microchip/ksz_ethtool.c
@@ -138,6 +138,27 @@ void ksz8_get_rmon_stats(struct ksz_device *dev, int port,
 	*ranges = ksz_rmon_ranges;
 }
 
+void ksz8_get_eth_ctrl_stats(struct ksz_device *dev, int port,
+			     struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+	struct ksz_port_mib *mib;
+	u64 *cnt;
+
+	mib = &dev->ports[port].mib;
+
+	mutex_lock(&mib->cnt_mutex);
+
+	cnt = &mib->counters[ksz8_tx_pause];
+	dev->dev_ops->r_mib_pkt(dev, port, ksz8_tx_pause, NULL, cnt);
+	ctrl_stats->MACControlFramesTransmitted = *cnt;
+
+	cnt = &mib->counters[ksz8_rx_pause];
+	dev->dev_ops->r_mib_pkt(dev, port, ksz8_rx_pause, NULL, cnt);
+	ctrl_stats->MACControlFramesReceived = *cnt;
+
+	mutex_unlock(&mib->cnt_mutex);
+}
+
 void ksz9477_get_rmon_stats(struct ksz_device *dev, int port,
 			    struct ethtool_rmon_stats *rmon_stats,
 			    const struct ethtool_rmon_hist_range **ranges)
@@ -176,3 +197,24 @@ void ksz9477_get_rmon_stats(struct ksz_device *dev, int port,
 
 	*ranges = ksz_rmon_ranges;
 }
+
+void ksz9477_get_eth_ctrl_stats(struct ksz_device *dev, int port,
+				struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+	struct ksz_port_mib *mib;
+	u64 *cnt;
+
+	mib = &dev->ports[port].mib;
+
+	mutex_lock(&mib->cnt_mutex);
+
+	cnt = &mib->counters[ksz9477_tx_pause];
+	dev->dev_ops->r_mib_pkt(dev, port, ksz9477_tx_pause, NULL, cnt);
+	ctrl_stats->MACControlFramesTransmitted = *cnt;
+
+	cnt = &mib->counters[ksz9477_rx_pause];
+	dev->dev_ops->r_mib_pkt(dev, port, ksz9477_rx_pause, NULL, cnt);
+	ctrl_stats->MACControlFramesReceived = *cnt;
+
+	mutex_unlock(&mib->cnt_mutex);
+}
diff --git a/drivers/net/dsa/microchip/ksz_ethtool.h b/drivers/net/dsa/microchip/ksz_ethtool.h
index 6927e2f143f8..18dc155d60b9 100644
--- a/drivers/net/dsa/microchip/ksz_ethtool.h
+++ b/drivers/net/dsa/microchip/ksz_ethtool.h
@@ -11,8 +11,12 @@
 void ksz8_get_rmon_stats(struct ksz_device *dev, int port,
 			 struct ethtool_rmon_stats *rmon_stats,
 			 const struct ethtool_rmon_hist_range **ranges);
+void ksz8_get_eth_ctrl_stats(struct ksz_device *dev, int port,
+			     struct ethtool_eth_ctrl_stats *ctrl_stats);
 
 void ksz9477_get_rmon_stats(struct ksz_device *dev, int port,
 			    struct ethtool_rmon_stats *rmon_stats,
 			    const struct ethtool_rmon_hist_range **ranges);
+void ksz9477_get_eth_ctrl_stats(struct ksz_device *dev, int port,
+				struct ethtool_eth_ctrl_stats *ctrl_stats);
 #endif
-- 
2.34.1