Function ionic_dev_start

dpdk/drivers/net/ionic/ionic_ethdev.c:856–941

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

 * It returns 0 on success.
 */
static int
ionic_dev_start(struct rte_eth_dev *eth_dev)
{
	struct rte_eth_conf *dev_conf = &eth_dev->data->dev_conf;
	struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
	struct ionic_adapter *adapter = lif->adapter;
	struct ionic_dev *idev = &adapter->idev;
	uint32_t speed = 0, allowed_speeds;
	uint8_t an_enable;
	int err;

	IONIC_PRINT_CALL();

	allowed_speeds =
		RTE_ETH_LINK_SPEED_FIXED |
		RTE_ETH_LINK_SPEED_10G |
		RTE_ETH_LINK_SPEED_25G |
		RTE_ETH_LINK_SPEED_40G |
		RTE_ETH_LINK_SPEED_50G |
		RTE_ETH_LINK_SPEED_100G;

	if (dev_conf->link_speeds & ~allowed_speeds) {
		IONIC_PRINT(ERR, "Invalid link setting");
		return -EINVAL;
	}

	if (dev_conf->lpbk_mode)
		IONIC_PRINT(WARNING, "Loopback mode not supported");

	/* Re-set features in case SG flag was added in rx_queue_setup() */
	err = ionic_lif_set_features(lif);
	if (err) {
		IONIC_PRINT(ERR, "Cannot set LIF features: %d", err);
		return err;
	}

	lif->frame_size = eth_dev->data->mtu + IONIC_ETH_OVERHEAD;

	err = ionic_lif_change_mtu(lif, eth_dev->data->mtu);
	if (err) {
		IONIC_PRINT(ERR, "Cannot set LIF frame size %u: %d",
			lif->frame_size, err);
		return err;
	}

	err = ionic_lif_start(lif);
	if (err) {
		IONIC_PRINT(ERR, "Cannot start LIF: %d", err);
		return err;
	}

	/* Configure link */
	an_enable = (dev_conf->link_speeds & RTE_ETH_LINK_SPEED_FIXED) == 0;

	ionic_dev_cmd_port_autoneg(idev, an_enable);
	err = ionic_dev_cmd_wait_check(idev, IONIC_DEVCMD_TIMEOUT);
	if (err)
		IONIC_PRINT(WARNING, "Failed to %s autonegotiation",