vmxnet3: Implement ethtool's get_channels command

Some tools (e.g. libxdp) use that information.

Signed-off-by: Andrey Turkin <andrey.turkin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
index c3eaf1b..e2034ad 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
@@ -1292,6 +1292,34 @@ done:
        return 0;
 }
 
+static void vmxnet3_get_channels(struct net_device *netdev,
+                                struct ethtool_channels *ec)
+{
+       struct vmxnet3_adapter *adapter = netdev_priv(netdev);
+
+       if (IS_ENABLED(CONFIG_PCI_MSI) && adapter->intr.type == VMXNET3_IT_MSIX) {
+               if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
+                       ec->combined_count = adapter->num_tx_queues;
+               } else {
+                       ec->rx_count = adapter->num_rx_queues;
+                       ec->tx_count =
+                               adapter->share_intr == VMXNET3_INTR_TXSHARE ?
+                                              1 : adapter->num_tx_queues;
+               }
+       } else {
+               ec->combined_count = 1;
+       }
+
+       ec->other_count = 1;
+
+       /* Number of interrupts cannot be changed on the fly */
+       /* Just set maximums to actual values */
+       ec->max_rx = ec->rx_count;
+       ec->max_tx = ec->tx_count;
+       ec->max_combined = ec->combined_count;
+       ec->max_other = ec->other_count;
+}
+
 static const struct ethtool_ops vmxnet3_ethtool_ops = {
        .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
                                     ETHTOOL_COALESCE_MAX_FRAMES |
@@ -1317,6 +1345,7 @@ static const struct ethtool_ops vmxnet3_ethtool_ops = {
        .set_rxfh          = vmxnet3_set_rss,
 #endif
        .get_link_ksettings = vmxnet3_get_link_ksettings,
+       .get_channels      = vmxnet3_get_channels,
 };
 
 void vmxnet3_set_ethtool_ops(struct net_device *netdev)