netdev - [PATCH net-next v2 2/4] tsnep: Add ethtool::get

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Message-Id: <20221130193708.70747-3-gerhard@engleder-embedded.com>
Date:   Wed, 30 Nov 2022 20:37:06 +0100
From:   Gerhard Engleder <gerhard@...leder-embedded.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, edumazet@...gle.com,
        pabeni@...hat.com, Gerhard Engleder <gerhard@...leder-embedded.com>
Subject: [PATCH net-next v2 2/4] tsnep: Add ethtool::get_channels support

Allow user space to read number of TX and RX queue. This is useful for
device dependent qdisc configurations like TAPRIO with hardware offload.
Also ethtool::get_per_queue_coalesce / set_per_queue_coalesce requires
that interface.

Signed-off-by: Gerhard Engleder <gerhard@...leder-embedded.com>
---
 drivers/net/ethernet/engleder/tsnep_ethtool.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/engleder/tsnep_ethtool.c b/drivers/net/ethernet/engleder/tsnep_ethtool.c
index c2640e88f347..517ac8de32bb 100644
--- a/drivers/net/ethernet/engleder/tsnep_ethtool.c
+++ b/drivers/net/ethernet/engleder/tsnep_ethtool.c
@@ -288,6 +288,17 @@ static int tsnep_ethtool_set_rxnfc(struct net_device *netdev,
 	}
 }
 
+static void tsnep_ethtool_get_channels(struct net_device *netdev,
+				       struct ethtool_channels *ch)
+{
+	struct tsnep_adapter *adapter = netdev_priv(netdev);
+
+	ch->max_rx = adapter->num_rx_queues;
+	ch->max_tx = adapter->num_tx_queues;
+	ch->rx_count = adapter->num_rx_queues;
+	ch->tx_count = adapter->num_tx_queues;
+}
+
 static int tsnep_ethtool_get_ts_info(struct net_device *netdev,
 				     struct ethtool_ts_info *info)
 {
@@ -327,6 +338,7 @@ const struct ethtool_ops tsnep_ethtool_ops = {
 	.get_sset_count = tsnep_ethtool_get_sset_count,
 	.get_rxnfc = tsnep_ethtool_get_rxnfc,
 	.set_rxnfc = tsnep_ethtool_set_rxnfc,
+	.get_channels = tsnep_ethtool_get_channels,
 	.get_ts_info = tsnep_ethtool_get_ts_info,
 	.get_link_ksettings = phy_ethtool_get_link_ksettings,
 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
-- 
2.30.2