[PATCH V4 2/2] net/mlx5: add support for flows targeting multicast MAC addresses

[Gavin Li]

Device multicast MAC addresses are managed using the mac_addr_add and
mac_addr_remove APIs.

In the mlx5_dev_spawn function, devices such as PF, VFs, and SFs obtain
the MAC addresses configured in netdev via netlink and store them in the
PMD device data, which also includes multicast MAC addresses. Default
rules are created for each MAC address to filter traffic accordingly.

Previously, multicast MAC address flows were mistakenly disabled, which
caused mac_addr_add to stop functioning for multicast MAC addresses,
resulting in missed multicast traffic.

To address this, default rules for multicast MAC addresses created by
PMD should now be set up within mlx5_traffic_enable to properly update
and manage multicast MAC address rules.

Fixes: 2d0665a7f771 ("net/mlx5: align PF and VF/SF MAC address handling")

Signed-off-by: Gavin Li <gavinl at nvidia.com>
---
 drivers/net/mlx5/mlx5_trigger.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 6c6f228afd..46479fbf09 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -1813,7 +1813,10 @@ mlx5_traffic_enable(struct rte_eth_dev *dev)
 	for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 		struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 
-		if (!memcmp(mac, &cmp, sizeof(*mac)) || rte_is_multicast_ether_addr(mac))
+		/* Add flows for unicast and multicast mac addresses added by API. */
+		if (!memcmp(mac, &cmp, sizeof(*mac)) ||
+		    !BITFIELD_ISSET(priv->mac_own, i) ||
+		    (dev->data->all_multicast && rte_is_multicast_ether_addr(mac)))
 			continue;
 		memcpy(&unicast.hdr.dst_addr.addr_bytes,
 		       mac->addr_bytes,
-- 
2.34.1