IGC_TDT
{ IGC_TDT(0), 4, PATTERN_TEST, 0x0000FFFF, 0x0000FFFF },
{IGC_TDT(0), "TDT"},
case IGC_TDT(0):
regs[n] = rd32(IGC_TDT(n));
regs_buff[164 + i] = rd32(IGC_TDT(i));
ring->tail = adapter->io_addr + IGC_TDT(reg_idx);