Commit c7cf81b5 authored by Lang Cheng's avatar Lang Cheng Committed by Zheng Zengkai
Browse files

RDMA/hns: Add support for sending port down event fastly 

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5Z2DS



----------------------------------------------------------

When the netdev port status changes, the roce driver sends a port down
event by parsing the netdev event dispatched by IB_CORE, which takes about
a few hundred milliseconds.
But,it is not fast enough for ULP sometimes.

The HNS NIC driver can directly notify the ROCE driver send port
event via callback function, this takes only a few milliseconds.
This patch implements this callback function.

Signed-off-by: default avatarLang Cheng <chenglang@huawei.com>
Signed-off-by: default avatarChengchang Tang <tangchengchang@huawei.com>
Reviewed-by: default avatarYangyang Li <liyangyang20@huawei.com>
Reviewed-by: default avatarYue Haibing <yuehaibing@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 5d705e82

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

+34 −0
Original line number Diff line number Diff line
@@ -7046,9 +7046,43 @@ static int hns_roce_hw_v2_reset_notify(struct hnae3_handle *handle, 
	return ret;

}



static void hns_roce_hw_v2_link_status_change(struct hnae3_handle *handle,

					      bool linkup)

{

	struct net_device *netdev = handle->rinfo.netdev;

	struct hns_roce_dev *hr_dev = handle->priv;

	struct ib_event event;

	unsigned long flags;

	u8 phy_port;



	if (linkup || !hr_dev)

		return;



	for (phy_port = 0; phy_port < hr_dev->caps.num_ports; phy_port++)

		if (netdev == hr_dev->iboe.netdevs[phy_port])

			break;



	if (phy_port == hr_dev->caps.num_ports)

		return;



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

	if (hr_dev->iboe.port_state[phy_port] == IB_PORT_DOWN) {

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

		return;

	}

	hr_dev->iboe.port_state[phy_port] = IB_PORT_DOWN;

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



	event.device = &hr_dev->ib_dev;

	event.element.port_num = to_rdma_port_num(phy_port);

	event.event = IB_EVENT_PORT_ERR;

	ib_dispatch_event(&event);

}



static const struct hnae3_client_ops hns_roce_hw_v2_ops = {

	.init_instance = hns_roce_hw_v2_init_instance,

	.uninit_instance = hns_roce_hw_v2_uninit_instance,

	.link_status_change = hns_roce_hw_v2_link_status_change,

	.reset_notify = hns_roce_hw_v2_reset_notify,

};