IXGBE_SECTXBUFFAF
regs_buff[1141] = IXGBE_READ_REG(hw, IXGBE_SECTXBUFFAF);
IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, 0x250);
reg = IXGBE_READ_REG(hw, IXGBE_SECTXBUFFAF);
IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, reg);