netdev - [net-next 12/12] net/mlx5e: Enable TC offload for ingress MACVLAN

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Date:   Fri, 24 Sep 2021 11:48:08 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Dima Chumak <dchumak@...dia.com>,
        Vlad Buslov <vladbu@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 12/12] net/mlx5e: Enable TC offload for ingress MACVLAN

From: Dima Chumak <dchumak@...dia.com>

Support offloading of TC rules that filter ingress traffic from a MACVLAN
device, which is attached to uplink representor.

Signed-off-by: Dima Chumak <dchumak@...dia.com>
Reviewed-by: Vlad Buslov <vladbu@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../ethernet/mellanox/mlx5/core/en/rep/tc.c    | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
index 8451940c16ab..398c6761eeb3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
@@ -3,6 +3,7 @@
 
 #include <net/dst_metadata.h>
 #include <linux/netdevice.h>
+#include <linux/if_macvlan.h>
 #include <linux/list.h>
 #include <linux/rculist.h>
 #include <linux/rtnetlink.h>
@@ -409,6 +410,13 @@ static void mlx5e_rep_indr_block_unbind(void *cb_priv)
 
 static LIST_HEAD(mlx5e_block_cb_list);
 
+static bool mlx5e_rep_macvlan_mode_supported(const struct net_device *dev)
+{
+	struct macvlan_dev *macvlan = netdev_priv(dev);
+
+	return macvlan->mode == MACVLAN_MODE_PASSTHRU;
+}
+
 static int
 mlx5e_rep_indr_setup_block(struct net_device *netdev, struct Qdisc *sch,
 			   struct mlx5e_rep_priv *rpriv,
@@ -422,8 +430,14 @@ mlx5e_rep_indr_setup_block(struct net_device *netdev, struct Qdisc *sch,
 	struct flow_block_cb *block_cb;
 
 	if (!mlx5e_tc_tun_device_to_offload(priv, netdev) &&
-	    !(is_vlan_dev(netdev) && vlan_dev_real_dev(netdev) == rpriv->netdev))
-		return -EOPNOTSUPP;
+	    !(is_vlan_dev(netdev) && vlan_dev_real_dev(netdev) == rpriv->netdev)) {
+		if (!(netif_is_macvlan(netdev) && macvlan_dev_real_dev(netdev) == rpriv->netdev))
+			return -EOPNOTSUPP;
+		if (!mlx5e_rep_macvlan_mode_supported(netdev)) {
+			netdev_warn(netdev, "Offloading ingress filter is supported only with macvlan passthru mode");
+			return -EOPNOTSUPP;
+		}
+	}
 
 	if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 		return -EOPNOTSUPP;
-- 
2.31.1