> > Subject: [PATCH rdma-next v1 4/5] RDMA/mana_ib: Enable RoCE on port 1
> >
> > Set netdev and RoCEv2 flag to be used in GID population.
> > mana_ib is auxiliary device, thus we need GIDs of the master netdev.
> >
> > Signed-off-by: Konstantin Taranov <kotaranov@xxxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/infiniband/hw/mana/device.c | 14 ++++++++++++++
> > drivers/infiniband/hw/mana/main.c | 16 ++++++++++++----
> > 2 files changed, 26 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/infiniband/hw/mana/device.c
> > b/drivers/infiniband/hw/mana/device.c
> > index 11b0410..b9ff3fd 100644
> > --- a/drivers/infiniband/hw/mana/device.c
> > +++ b/drivers/infiniband/hw/mana/device.c
> > @@ -53,6 +53,7 @@ static int mana_ib_probe(struct auxiliary_device
> *adev, {
> > struct mana_adev *madev = container_of(adev, struct mana_adev,
> > adev);
> > struct gdma_dev *mdev = madev->mdev;
> > + struct net_device *upper_ndev;
> > struct mana_context *mc;
> > struct mana_ib_dev *dev;
> > int ret;
> > @@ -79,6 +80,19 @@ static int mana_ib_probe(struct auxiliary_device
> *adev,
> > dev->ib_dev.num_comp_vectors = 1;
> > dev->ib_dev.dev.parent = mdev->gdma_context->dev;
> >
> > + rcu_read_lock(); /* required to get upper dev */
> > + upper_ndev = netdev_master_upper_dev_get_rcu(mc->ports[0]);
> > + rcu_read_unlock();
>
> Should call rcu_read_unlock() after upper_ndev is used and no longer
> needed, or it could be freed after someone calls rcu_synchronize().
>
Thanks! I will unlock right after the netdev is set. I will address it in the v2.
> > + if (!upper_ndev) {
> > + ibdev_err(&dev->ib_dev, "Failed to get master netdev");
> > + goto free_ib_device;
> > + }
> > + ret = ib_device_set_netdev(&dev->ib_dev, upper_ndev, 1);
> > + if (ret) {
> > + ibdev_err(&dev->ib_dev, "Failed to set ib netdev, ret %d",
> ret);
> > + goto free_ib_device;
> > + }
> > +
> > ret = mana_gd_register_device(&mdev->gdma_context->mana_ib);
> > if (ret) {
> > ibdev_err(&dev->ib_dev, "Failed to register device, ret %d",
> diff -
> > -git a/drivers/infiniband/hw/mana/main.c
> > b/drivers/infiniband/hw/mana/main.c
> > index 3e05a62..645abf3 100644
> > --- a/drivers/infiniband/hw/mana/main.c
> > +++ b/drivers/infiniband/hw/mana/main.c
> > @@ -462,11 +462,19 @@ int mana_ib_mmap(struct ib_ucontext
> *ibcontext,
> > struct vm_area_struct *vma) int mana_ib_get_port_immutable(struct
> > ib_device *ibdev, u32 port_num,
> > struct ib_port_immutable *immutable) {
> > - /*
> > - * This version only support RAW_PACKET
> > - * other values need to be filled for other types
> > - */
> > + struct mana_ib_dev *mdev = container_of(ibdev, struct
> mana_ib_dev,
> > ib_dev);
> > + struct ib_port_attr attr;
> > + int err;
> > +
> > + err = ib_query_port(ibdev, port_num, &attr);
> > + if (err)
> > + return err;
> > +
> > + immutable->pkey_tbl_len = attr.pkey_tbl_len;
> > + immutable->gid_tbl_len = attr.gid_tbl_len;
> > immutable->core_cap_flags = RDMA_CORE_PORT_RAW_PACKET;
> > + if (port_num == 1 && rnic_is_enabled(mdev))
> > + immutable->core_cap_flags |=
> > RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
> >
> > return 0;
> > }
> > --
> > 1.8.3.1
