IXGBE_IVAR
regs_buff[25] = IXGBE_READ_REG(hw, IXGBE_IVAR(0));
ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);