Function nfp_net_close

dpdk/drivers/net/nfp/nfp_ethdev.c:387–457

Reset and stop device. The device can not be restarted. */

/* Reset and stop device. The device can not be restarted. */
static int
nfp_net_close(struct rte_eth_dev *dev)
{
	uint8_t i;
	uint8_t id;
	struct nfp_net_hw *hw;
	struct nfp_pf_dev *pf_dev;
	struct rte_pci_device *pci_dev;
	struct nfp_app_fw_nic *app_fw_nic;

	/*
	 * In secondary process, a released eth device can be found by its name
	 * in shared memory.
	 * If the state of the eth device is RTE_ETH_DEV_UNUSED, it means the
	 * eth device has been released.
	 */
	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
		if (dev->state == RTE_ETH_DEV_UNUSED)
			return 0;

		nfp_pf_secondary_uninit(dev->process_private);
		return 0;
	}

	hw = dev->data->dev_private;
	pf_dev = hw->pf_dev;
	pci_dev = RTE_ETH_DEV_TO_PCI(dev);
	app_fw_nic = NFP_PRIV_TO_APP_FW_NIC(pf_dev->app_fw_priv);

	/*
	 * We assume that the DPDK application is stopping all the
	 * threads/queues before calling the device close function.
	 */
	nfp_net_disable_queues(dev);

	/* Clear queues */
	nfp_net_close_tx_queue(dev);
	nfp_net_close_rx_queue(dev);

	/* Cancel possible impending LSC work here before releasing the port */
	rte_eal_alarm_cancel(nfp_net_dev_interrupt_delayed_handler, (void *)dev);

	/* Only free PF resources after all physical ports have been closed */
	/* Mark this port as unused and free device priv resources */
	nn_cfg_writeb(&hw->super, NFP_NET_CFG_LSC, 0xff);

	if (pf_dev->app_fw_id != NFP_APP_FW_CORE_NIC)
		return -EINVAL;

	nfp_cleanup_port_app_fw_nic(pf_dev, hw->idx);

	for (i = 0; i < app_fw_nic->total_phyports; i++) {
		id = nfp_function_id_get(pf_dev, i);

		/* Check to see if ports are still in use */
		if (app_fw_nic->ports[id] != NULL)
			return 0;
	}