/* * The Tulip filter is programmed by "transmitting" a Setup Packet * (indicated by TDCTL_Tx_SET). The filtering type is indicated * as follows: * * FT1 FT0 Description * --- --- ----------- * 0 0 Perfect Filtering: The Tulip interprets the * descriptor buffer as a table of 16 MAC addresses * that the Tulip should receive. * * 0 1 Hash Filtering: The Tulip interprets the * descriptor buffer as a 512-bit hash table * plus one perfect address. If the incoming * address is Multicast, the hash table filters * the address, else the address is filtered by * the perfect address. * * 1 0 Inverse Filtering: Like Perfect Filtering, except * the table is addresses that the Tulip does NOT * receive. * * 1 1 Hash-only Filtering: Like Hash Filtering, but * physical addresses are matched by the hash table * as well, and not by matching a single perfect * address. * * A Setup Packet must always be 192 bytes long. The Tulip can store * 16 MAC addresses. If not all 16 are specified in Perfect Filtering * or Inverse Filtering mode, then unused entries should duplicate * one of the valid entries. */