IB/hns: Register HNS RoCE Driver get_netdev() with IB Core

This patch adds get_netdev() function to the IB device. This shall be
used to fetch netdev corresponding to the port number. This function
would be called by IB core(Generic CM Agent) for example, when the
RDMA connection is being established.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Reviewed-by: Wei Hu <xavier.huwei@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index f64f0dde9a882c7ee697d990e4bf7acae6765610..39e69c31c5f2586faacf16ce021d842050aeeebe 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -372,6 +372,25 @@ static int hns_roce_query_device(struct ib_device *ib_dev,
        return 0;
 }
 
+static struct net_device *hns_roce_get_netdev(struct ib_device *ib_dev,
+                                             u8 port_num)
+{
+       struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
+       struct net_device *ndev;
+
+       if (port_num < 1 || port_num > hr_dev->caps.num_ports)
+               return NULL;
+
+       rcu_read_lock();
+
+       ndev = hr_dev->iboe.netdevs[port_num - 1];
+       if (ndev)
+               dev_hold(ndev);
+
+       rcu_read_unlock();
+       return ndev;
+}
+
 static int hns_roce_query_port(struct ib_device *ib_dev, u8 port_num,
                               struct ib_port_attr *props)
 {
@@ -618,6 +637,7 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
        ib_dev->query_port              = hns_roce_query_port;
        ib_dev->modify_port             = hns_roce_modify_port;
        ib_dev->get_link_layer          = hns_roce_get_link_layer;
+       ib_dev->get_netdev              = hns_roce_get_netdev;
        ib_dev->query_gid               = hns_roce_query_gid;
        ib_dev->query_pkey              = hns_roce_query_pkey;
        ib_dev->alloc_ucontext          = hns_roce_alloc_ucontext;