[PATCH] enic: add ethtool get_channel support

From: Jon Kohler
Date: Tue Jun 18 2024 - 12:03:00 EST


Add .get_channel to enic_ethtool_ops to enable basic ethtool -l
support to get the current channel configuration.

Note that the driver does not support dynamically changing queue
configuration, so .set_channel is intentionally unused. Instead, users
should use Cisco's hardware management tools (UCSM/IMC) to modify
virtual interface card configuration out of band.

Signed-off-by: Jon Kohler <jon@xxxxxxxxxxx>
---
drivers/net/ethernet/cisco/enic/enic_ethtool.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index 241906697019..efbc0715b10e 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
@@ -608,6 +608,23 @@ static int enic_get_ts_info(struct net_device *netdev,
return 0;
}

+static void enic_get_channels(struct net_device *netdev,
+ struct ethtool_channels *channels)
+{
+ struct enic *enic = netdev_priv(netdev);
+
+ channels->max_rx = ENIC_RQ_MAX;
+ channels->max_tx = ENIC_WQ_MAX;
+ channels->rx_count = enic->rq_count;
+ channels->tx_count = enic->wq_count;
+
+ /* enic doesn't use other channels or combined channels */
+ channels->combined_count = 0;
+ channels->max_combined = 0;
+ channels->max_other = 0;
+ channels->other_count = 0;
+}
+
static const struct ethtool_ops enic_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_USE_ADAPTIVE_RX |
@@ -632,6 +649,7 @@ static const struct ethtool_ops enic_ethtool_ops = {
.set_rxfh = enic_set_rxfh,
.get_link_ksettings = enic_get_ksettings,
.get_ts_info = enic_get_ts_info,
+ .get_channels = enic_get_channels,
};

void enic_set_ethtool_ops(struct net_device *netdev)
--
2.43.0