Re: [PATCH v5 net-next 04/15] net: enetc: add basic operations to the FDB table

Paolo Abeni
2026-05-05T08:59:28Z

On 4/30/26 4:49 AM, Wei Fang wrote:
> The FDB table is used for MAC learning lookups and MAC forwarding lookups.
> Each table entry includes information such as a FID and MAC address that
> may be unicast or multicast and a forwarding destination field containing
> a port bitmap identifying the associated port(s) with the MAC address.
> FDB table entries can be static or dynamic. Static entries are added from
> software whereby dynamic entries are added either by software or by the
> hardware as MAC addresses are learned in the datapath.
>
> The FDB table can only be managed by the command BD ring using table
> management protocol version 2.0. Table management command operations Add,
> Delete, Update and Query are supported. And the FDB table supports three
> access methods: Entry ID, Exact Match Key Element and Search. This patch
> adds the following basic supports to the FDB table.
>
> ntmp_fdbt_update_entry() - update the configuration element data of a
> specified FDB entry
>
> ntmp_fdbt_delete_entry() - delete a specified FDB entry
>
> ntmp_fdbt_add_entry() - add an entry into the FDB table
>
> ntmp_fdbt_search_port_entry() - Search the FDB entry on the specified
> port based on RESUME_ENTRY_ID.
>
> Signed-off-by: Wei Fang <wei.fang@nxp.com>
> ---
> drivers/net/ethernet/freescale/enetc/ntmp.c | 203 +++++++++++++++++-
> .../ethernet/freescale/enetc/ntmp_private.h | 61 +++++-
> include/linux/fsl/ntmp.h | 44 +++-
> 3 files changed, 305 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/freescale/enetc/ntmp.c b/drivers/net/ethernet/freescale/enetc/ntmp.c
> index c94a928622fd..4ed8d783a9a2 100644
> --- a/drivers/net/ethernet/freescale/enetc/ntmp.c
> +++ b/drivers/net/ethernet/freescale/enetc/ntmp.c
> @@ -1,7 +1,7 @@
> // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
> /*
> * NETC NTMP (NETC Table Management Protocol) 2.0 Library
> - * Copyright 2025 NXP
> + * Copyright 2025-2026 NXP
> */
>
> #include <linux/dma-mapping.h>
> @@ -21,11 +21,15 @@
> /* Define NTMP Table ID */
> #define NTMP_MAFT_ID 1
> #define NTMP_RSST_ID 3
> +#define NTMP_FDBT_ID 15
>
> /* Generic Update Actions for most tables */
> #define NTMP_GEN_UA_CFGEU BIT(0)
> #define NTMP_GEN_UA_STSEU BIT(1)
>
> +/* Query Action: 0: Full query, 1: Only query entry ID */
> +#define NTMP_QA_ENTRY_ID 1

Sashiko noted that the above comments looks inconsistent with the update
code, where NTMP_QA_ENTRY_ID apparently uses a full query, and 0 just
the entry ID.

If you have to repost for other reasons, please fix this. Note that you
should reply on the ML to sashiko reviews ruling out invalid comments.

Thanks,

Paolo