Function atl_dev_start

dpdk/drivers/net/atlantic/atl_ethdev.c:476–597

* Configure device link speed and setup link. * It returns 0 on success. */

 * It returns 0 on success.
 */
static int
atl_dev_start(struct rte_eth_dev *dev)
{
	struct aq_hw_s *hw = ATL_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;
	uint32_t intr_vector = 0;
	int status;
	int err;

	PMD_INIT_FUNC_TRACE();

	/* set adapter started */
	hw->adapter_stopped = 0;

	if (dev->data->dev_conf.link_speeds & RTE_ETH_LINK_SPEED_FIXED) {
		PMD_INIT_LOG(ERR,
		"Invalid link_speeds for port %u, fix speed not supported",
				dev->data->port_id);
		return -EINVAL;
	}

	/* disable uio/vfio intr/eventfd mapping */
	rte_intr_disable(intr_handle);

	/* reinitialize adapter
	 * this calls reset and start
	 */
	status = atl_reset_hw(hw);
	if (status != 0)
		return -EIO;

	err = hw_atl_b0_hw_init(hw, dev->data->mac_addrs->addr_bytes);

	hw_atl_b0_hw_start(hw);
	/* check and configure queue intr-vector mapping */
	if ((rte_intr_cap_multiple(intr_handle) ||
	    !RTE_ETH_DEV_SRIOV(dev).active) &&
	    dev->data->dev_conf.intr_conf.rxq != 0) {
		intr_vector = dev->data->nb_rx_queues;
		if (intr_vector > ATL_MAX_INTR_QUEUE_NUM) {
			PMD_INIT_LOG(ERR, "At most %d intr queues supported",
					ATL_MAX_INTR_QUEUE_NUM);
			return -ENOTSUP;
		}
		if (rte_intr_efd_enable(intr_handle, intr_vector)) {
			PMD_INIT_LOG(ERR, "rte_intr_efd_enable failed");
			return -1;
		}
	}

	if (rte_intr_dp_is_en(intr_handle)) {
		if (rte_intr_vec_list_alloc(intr_handle, "intr_vec",
						   dev->data->nb_rx_queues)) {
			PMD_INIT_LOG(ERR, "Failed to allocate %d rx_queues"
				     " intr_vec", dev->data->nb_rx_queues);
			return -ENOMEM;
		}