net: enetc: add basic operations to the FDB table

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>
Link: https://patch.msgid.link/20260518082506.1318236-5-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

1 files changed, 43 insertions, 1 deletions

diff --git a/include/linux/fsl/ntmp.h b/include/linux/fsl/ntmp.h
index 83a449b4d6ec..4cfff835954e 100644
--- a/include/linux/fsl/ntmp.h
+++ b/include/linux/fsl/ntmp.h
@@ -1,11 +1,13 @@
 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
-/* Copyright 2025 NXP */
+/* Copyright 2025-2026 NXP */
 #ifndef __NETC_NTMP_H
 #define __NETC_NTMP_H
 
 #include <linux/bitops.h>
 #include <linux/if_ether.h>
 
+#define NTMP_NULL_ENTRY_ID		0xffffffffU
+
 struct maft_keye_data {
 	u8 mac_addr[ETH_ALEN];
 	__le16 resv;
@@ -29,6 +31,7 @@ struct netc_cbdr_regs {
 struct netc_tbl_vers {
 	u8 maft_ver;
 	u8 rsst_ver;
+	u8 fdbt_ver;
 };
 
 struct netc_swcbd {
@@ -68,6 +71,36 @@ struct maft_entry_data {
 	struct maft_cfge_data cfge;
 };
 
+struct fdbt_keye_data {
+	u8 mac_addr[ETH_ALEN]; /* big-endian */
+	__le16 resv0;
+	__le16 fid;
+#define FDBT_FID		GENMASK(11, 0)
+	__le16 resv1;
+};
+
+struct fdbt_cfge_data {
+	__le32 port_bitmap;
+#define FDBT_PORT_BITMAP	GENMASK(23, 0)
+	__le32 cfg;
+#define FDBT_OETEID		GENMASK(1, 0)
+#define FDBT_EPORT		GENMASK(6, 2)
+#define FDBT_IMIRE		BIT(7)
+#define FDBT_CTD		GENMASK(10, 9)
+#define FDBT_DYNAMIC		BIT(11)
+#define FDBT_TIMECAPE		BIT(12)
+	__le32 et_eid;
+};
+
+struct fdbt_entry_data {
+	u32 entry_id;
+	struct fdbt_keye_data keye;
+	struct fdbt_cfge_data cfge;
+	u8 acte;
+#define FDBT_ACT_CNT		GENMASK(6, 0)
+#define FDBT_ACT_FLAG		BIT(7)
+};
+
 #if IS_ENABLED(CONFIG_NXP_NETC_LIB)
 int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev,
 		   const struct netc_cbdr_regs *regs);
@@ -83,6 +116,15 @@ int ntmp_rsst_update_entry(struct ntmp_user *user, const u32 *table,
 			   int count);
 int ntmp_rsst_query_entry(struct ntmp_user *user,
 			  u32 *table, int count);
+int ntmp_fdbt_add_entry(struct ntmp_user *user, u32 *entry_id,
+			const struct fdbt_keye_data *keye,
+			const struct fdbt_cfge_data *cfge);
+int ntmp_fdbt_update_entry(struct ntmp_user *user, u32 entry_id,
+			   const struct fdbt_cfge_data *cfge);
+int ntmp_fdbt_delete_entry(struct ntmp_user *user, u32 entry_id);
+int ntmp_fdbt_search_port_entry(struct ntmp_user *user, int port,
+				u32 *resume_entry_id,
+				struct fdbt_entry_data *entry);
 #else
 static inline int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev,
 				 const struct netc_cbdr_regs *regs)