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

[Slava Ovsiienko]

> -----Original Message-----
> From: Minggang(Gavin) Li <gavinl at nvidia.com>
> Sent: Friday, August 29, 2025 12:09 PM
> To: Matan Azrad <matan at nvidia.com>; Slava Ovsiienko
> <viacheslavo at nvidia.com>; Ori Kam <orika at nvidia.com>; NBU-Contact-
> Thomas Monjalon (EXTERNAL) <thomas at monjalon.net>; Dariusz Sosnowski
> <dsosnowski at nvidia.com>; Bing Zhao <bingz at nvidia.com>; Suanming Mou
> <suanmingm at nvidia.com>; Minggang(Gavin) Li <gavinl at nvidia.com>
> Cc: dev at dpdk.org; Raslan Darawsheh <rasland at nvidia.com>
> Subject: [PATCH V4 2/2] net/mlx5: add support for flows targeting multicast
> MAC addresses
> 
> 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>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>