mlxsw: spectrum: Add a new type of KVD linear record

When the device needs to flood an overlay packet to remote VTEPs it
retrieves a pointer to the head of a linked-list of records that store
the IP addresses of these VTEPs.

These records are stored in the KVD linear memory and configured via the
Tunneling NVE Underlay Multicast Table (TNUMT) register.

Add a new KVD linear entry type for these records, so that we will be
able to allocate and free them.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -438,6 +438,7 @@ enum mlxsw_sp_kvdl_entry_type {
 	MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET,
 	MLXSW_SP_KVDL_ENTRY_TYPE_PBS,
 	MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR,
+	MLXSW_SP_KVDL_ENTRY_TYPE_TNUMT,
 };
 
 static inline unsigned int
@@ -448,6 +449,7 @@ mlxsw_sp_kvdl_entry_size(enum mlxsw_sp_kvdl_entry_type type)
 	case MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET: /* fall through */
 	case MLXSW_SP_KVDL_ENTRY_TYPE_PBS: /* fall through */
 	case MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR: /* fall through */
+	case MLXSW_SP_KVDL_ENTRY_TYPE_TNUMT: /* fall through */
 	default:
 		return 1;
 	}

drivers/net/ethernet/mellanox/mlxsw/spectrum2_kvdl.c

@@ -35,6 +35,7 @@ static const struct mlxsw_sp2_kvdl_part_info mlxsw_sp2_kvdl_parts_info[] = {
 				 MAX_KVD_ACTION_SETS),
 	MLXSW_SP2_KVDL_PART_INFO(PBS, 0x24, KVD_SIZE, KVD_SIZE),
 	MLXSW_SP2_KVDL_PART_INFO(MCRIGR, 0x26, KVD_SIZE, KVD_SIZE),
+	MLXSW_SP2_KVDL_PART_INFO(TNUMT, 0x29, KVD_SIZE, KVD_SIZE),
 };
 
 #define MLXSW_SP2_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp2_kvdl_parts_info)