Function mlx5_dev_spawn

dpdk/drivers/net/mlx5/linux/mlx5_os.c:1100–1789

* Spawn an Ethernet device from Verbs information. * * @param dpdk_dev * Backing DPDK device. * @param spawn * Verbs device parameters (name, port, switch_info) to spawn. * @param eth_da * Device arguments. * @param mkvlist * Pointer to mlx5 kvargs control, can be NULL if there is no devargs. * * @return * A valid Ethernet device object on success, NULL otherwise and rte_errn

 *   EEXIST: device is already spawned
 */
static struct rte_eth_dev *
mlx5_dev_spawn(struct rte_device *dpdk_dev,
	       struct mlx5_dev_spawn_data *spawn,
	       struct rte_eth_devargs *eth_da,
	       struct mlx5_kvargs_ctrl *mkvlist)
{
	const struct mlx5_switch_info *switch_info = &spawn->info;
	struct mlx5_dev_ctx_shared *sh = NULL;
	struct ibv_port_attr port_attr = { .state = IBV_PORT_NOP };
	struct rte_eth_dev *eth_dev = NULL;
	struct mlx5_priv *priv = NULL;
	int err = 0;
	struct rte_ether_addr mac;
	char name[RTE_ETH_NAME_MAX_LEN];
	int own_domain_id = 0;
	uint16_t port_id;
	struct mlx5_port_info vport_info = { .query_flags = 0 };
	int nl_rdma;
	int i;

	/* Determine if this port representor is supposed to be spawned. */
	if (switch_info->representor && dpdk_dev->devargs &&
	    !mlx5_representor_match(spawn, eth_da))
		return NULL;
	/* Build device name. */
	if (spawn->pf_bond >= 0) {
		/* Bonding device. */
		if (!switch_info->representor) {
			err = snprintf(name, sizeof(name), "%s_%s",
				       dpdk_dev->name, spawn->phys_dev_name);
		} else {
			err = snprintf(name, sizeof(name), "%s_%s_representor_c%dpf%d%s%u",
				dpdk_dev->name, spawn->phys_dev_name,
				switch_info->ctrl_num,
				switch_info->pf_num,
				switch_info->name_type ==
				MLX5_PHYS_PORT_NAME_TYPE_PFSF ? "sf" : "vf",
				switch_info->port_name);
		}
	} else if (mlx5_is_probed_port_on_mpesw_device(spawn)) {
		/* MPESW device. */
		if (switch_info->name_type == MLX5_PHYS_PORT_NAME_TYPE_UPLINK) {
			err = snprintf(name, sizeof(name), "%s_p%d",
				       dpdk_dev->name, spawn->mpesw_port);
		} else {
			err = snprintf(name, sizeof(name), "%s_representor_c%dpf%d%s%u",
				dpdk_dev->name,
				switch_info->ctrl_num,
				switch_info->pf_num,
				switch_info->name_type ==
				MLX5_PHYS_PORT_NAME_TYPE_PFSF ? "sf" : "vf",
				switch_info->port_name);
		}
	} else {
		/* Single device. */
		if (!switch_info->representor)
			strlcpy(name, dpdk_dev->name, sizeof(name));
		else