static int hns_roce_query_port(struct ib_device *ib_dev, u8 port_num,
			       struct ib_port_attr *props)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
	struct device *dev = hr_dev->dev;
	struct net_device *net_dev;
	unsigned long flags;
	enum ib_mtu mtu;
	u8 port;

	assert(port_num > 0);
	port = port_num - 1;

	/* props being zeroed by the caller, avoid zeroing it here */

	props->max_mtu = hr_dev->caps.max_mtu;
	props->gid_tbl_len = hr_dev->caps.gid_table_len[port];
	props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
				IB_PORT_VENDOR_CLASS_SUP |
				IB_PORT_BOOT_MGMT_SUP;
	props->max_msg_sz = HNS_ROCE_MAX_MSG_LEN;
	props->pkey_tbl_len = 1;
	props->active_width = IB_WIDTH_4X;
	props->active_speed = 1;

	spin_lock_irqsave(&hr_dev->iboe.lock, flags);

	net_dev = hr_dev->iboe.netdevs[port];
	if (!net_dev) {
		spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
		dev_err(dev, "find netdev %d failed!\r\n", port);
		return -EINVAL;
	}

	mtu = iboe_get_mtu(net_dev->mtu);
	props->active_mtu = mtu ? min(props->max_mtu, mtu) : IB_MTU_256;
	props->state = (netif_running(net_dev) && netif_carrier_ok(net_dev)) ?
			IB_PORT_ACTIVE : IB_PORT_DOWN;
	props->phys_state = (props->state == IB_PORT_ACTIVE) ? 5 : 3;

	spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);

	return 0;
}
Unknown