nfp: add support for ethtool .get_channels

Report number of rings via ethtool .get_channels API.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 3418f22..a7386d1 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -614,6 +614,21 @@ static int nfp_net_set_coalesce(struct net_device *netdev,
        return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
 }
 
+static void nfp_net_get_channels(struct net_device *netdev,
+                                struct ethtool_channels *channel)
+{
+       struct nfp_net *nn = netdev_priv(netdev);
+
+       channel->max_rx = min(nn->max_rx_rings, nn->max_r_vecs);
+       channel->max_tx = min(nn->max_tx_rings, nn->max_r_vecs);
+       channel->max_combined = min(channel->max_rx, channel->max_tx);
+       channel->max_other = NFP_NET_NON_Q_VECTORS;
+       channel->combined_count = min(nn->num_rx_rings, nn->num_tx_rings);
+       channel->rx_count = nn->num_rx_rings - channel->combined_count;
+       channel->tx_count = nn->num_tx_rings - channel->combined_count;
+       channel->other_count = NFP_NET_NON_Q_VECTORS;
+}
+
 static const struct ethtool_ops nfp_net_ethtool_ops = {
        .get_drvinfo            = nfp_net_get_drvinfo,
        .get_link               = ethtool_op_get_link,
@@ -632,6 +647,7 @@ static const struct ethtool_ops nfp_net_ethtool_ops = {
        .get_regs               = nfp_net_get_regs,
        .get_coalesce           = nfp_net_get_coalesce,
        .set_coalesce           = nfp_net_set_coalesce,
+       .get_channels           = nfp_net_get_channels,
 };
 
 void nfp_net_set_ethtool_ops(struct net_device *netdev)