mlx5: Add ndo_poll_controller() implementation

This implements ndo_poll_controller in net_device_ops callbacks for mlx5,
which is necessary to use netconsole with this driver.

Acked-By: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Calvin Owens <calvinowens@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index b58cfe37dead..7eaf38020a8f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -3188,6 +3188,20 @@ static int mlx5e_xdp(struct net_device *dev, struct netdev_xdp *xdp)
         }
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/* Fake "interrupt" called by netpoll (eg netconsole) to send skbs without
+ * reenabling interrupts.
+ */
+static void mlx5e_netpoll(struct net_device *dev)
+{
+        struct mlx5e_priv *priv = netdev_priv(dev);
+        int i;
+
+        for (i = 0; i < priv->params.num_channels; i++)
+                napi_schedule(&priv->channel[i]->napi);
+}
+#endif
+
 static const struct net_device_ops mlx5e_netdev_ops_basic = {
         .ndo_open                = mlx5e_open,
         .ndo_stop                = mlx5e_close,
@@ -3208,6 +3222,9 @@ static const struct net_device_ops mlx5e_netdev_ops_basic = {
 #endif
         .ndo_tx_timeout          = mlx5e_tx_timeout,
         .ndo_xdp                 = mlx5e_xdp,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        .ndo_poll_controller     = mlx5e_netpoll,
+#endif
 };
 
 static const struct net_device_ops mlx5e_netdev_ops_sriov = {
@@ -3240,6 +3257,9 @@ static const struct net_device_ops mlx5e_netdev_ops_sriov = {
         .ndo_get_vf_stats        = mlx5e_get_vf_stats,
         .ndo_tx_timeout          = mlx5e_tx_timeout,
         .ndo_xdp                 = mlx5e_xdp,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        .ndo_poll_controller     = mlx5e_netpoll,
+#endif
 };
 
 static int mlx5e_check_required_hca_cap(struct mlx5_core_dev *mdev)