Function mlx4_flow_ctrl_get

dpdk/drivers/net/mlx4/mlx4_ethdev.c:846–877

* DPDK callback to get flow control status. * * @param dev * Pointer to Ethernet device structure. * @param[out] fc_conf * Flow control output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */

 *   0 on success, negative errno value otherwise and rte_errno is set.
 */
int
mlx4_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
	struct mlx4_priv *priv = dev->data->dev_private;
	struct ifreq ifr;
	struct ethtool_pauseparam ethpause = {
		.cmd = ETHTOOL_GPAUSEPARAM,
	};
	int ret;

	ifr.ifr_data = (void *)&ethpause;
	if (mlx4_ifreq(priv, SIOCETHTOOL, &ifr)) {
		ret = rte_errno;
		WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
		     " failed: %s",
		     strerror(rte_errno));
		goto out;
	}
	fc_conf->autoneg = ethpause.autoneg;
	if (ethpause.rx_pause && ethpause.tx_pause)
		fc_conf->mode = RTE_ETH_FC_FULL;
	else if (ethpause.rx_pause)
		fc_conf->mode = RTE_ETH_FC_RX_PAUSE;
	else if (ethpause.tx_pause)
		fc_conf->mode = RTE_ETH_FC_TX_PAUSE;
	else
		fc_conf->mode = RTE_ETH_FC_NONE;
	ret = 0;
out:
	MLX4_ASSERT(ret >= 0);
	return -ret;
}

/**
 * DPDK callback to modify flow control parameters.