Function eth_em_stop

dpdk/drivers/net/e1000/em_ethdev.c:730–781

* * This routine disables all traffic on the adapter by issuing a * global reset on the MAC. * **********************************************************************/

 *
 **********************************************************************/
static int
eth_em_stop(struct rte_eth_dev *dev)
{
	struct rte_eth_link link;
	struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
	struct rte_intr_handle *intr_handle = pci_dev->intr_handle;

	/*
	 * This function calls into the base driver, which in turn will use
	 * function pointers, which are not guaranteed to be valid in secondary
	 * processes, so avoid using this function in secondary processes.
	 */
	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return -E_RTE_SECONDARY;

	dev->data->dev_started = 0;

	eth_em_rxtx_control(dev, false);
	em_rxq_intr_disable(hw);
	em_lsc_intr_disable(hw);

	e1000_reset_hw(hw);

	/* Flush desc rings for i219 */
	if (hw->mac.type == e1000_pch_spt || hw->mac.type == e1000_pch_cnp)
		em_flush_desc_rings(dev);

	if (hw->mac.type >= e1000_82544)
		E1000_WRITE_REG(hw, E1000_WUC, 0);

	/* Power down the phy. Needed to make the link go down */
	e1000_power_down_phy(hw);

	em_dev_clear_queues(dev);

	/* clear the recorded link status */
	memset(&link, 0, sizeof(link));
	rte_eth_linkstatus_set(dev, &link);

	if (!rte_intr_allow_others(intr_handle))
		/* resume to the default handler */
		rte_intr_callback_register(intr_handle,
					   eth_em_interrupt_handler,
					   (void *)dev);

	/* Clean datapath event and queue/vec mapping */
	rte_intr_efd_disable(intr_handle);
	rte_intr_vec_list_free(intr_handle);

	return 0;
}

static int
eth_em_close(struct rte_eth_dev *dev)