+static void ipoib_set_dev_features(struct ipoib_dev_priv *priv)
+{
+ priv->hca_caps = priv->ca->attrs.device_cap_flags;
+
+ if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
+ priv->dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
+
+ if (priv->hca_caps & IB_DEVICE_UD_TSO)
+ priv->dev->hw_features |= NETIF_F_TSO;
+
+ priv->dev->features |= priv->dev->hw_features;
+ }
+}
+
+static int ipoib_parent_init(struct net_device *ndev)
+{
+ struct ipoib_dev_priv *priv = ipoib_priv(ndev);
+ struct ib_port_attr attr;
+ int result;
+
+ result = ib_query_port(priv->ca, priv->port, &attr);
+ if (result) {
+ pr_warn("%s: ib_query_port %d failed\n", priv->ca->name,
+ priv->port);
+ return result;
+ }
+ priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
+
+ result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
+ if (result) {
+ pr_warn("%s: ib_query_pkey port %d failed (ret = %d)\n",
+ priv->ca->name, priv->port, result);
+ return result;
+ }
+
+ result = rdma_query_gid(priv->ca, priv->port, 0, &priv->local_gid);
+ if (result) {
+ pr_warn("%s: rdma_query_gid port %d failed (ret = %d)\n",
+ priv->ca->name, priv->port, result);
+ return result;
+ }
+ memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw,
+ sizeof(union ib_gid));
+
+ SET_NETDEV_DEV(priv->dev, priv->ca->dev.parent);
+ priv->dev->dev_id = priv->port - 1;
+
+ return 0;
+}
+
+static void ipoib_child_init(struct net_device *ndev)
+{
+ struct ipoib_dev_priv *priv = ipoib_priv(ndev);
+ struct ipoib_dev_priv *ppriv = ipoib_priv(priv->parent);
+
+ priv->max_ib_mtu = ppriv->max_ib_mtu;
+ set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
+ memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
+ memcpy(&priv->local_gid, &ppriv->local_gid, sizeof(priv->local_gid));
+}
+
+static int ipoib_ndo_init(struct net_device *ndev)
+{
+ struct ipoib_dev_priv *priv = ipoib_priv(ndev);
+ int rc;
+
+ if (priv->parent) {
+ ipoib_child_init(ndev);
+ } else {
+ rc = ipoib_parent_init(ndev);
+ if (rc)
+ return rc;
+ }
+
+ /* MTU will be reset when mcast join happens */
+ ndev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
+ priv->mcast_mtu = priv->admin_mtu = ndev->mtu;
+ ndev->max_mtu = IPOIB_CM_MTU;
+
+ ndev->neigh_priv_len = sizeof(struct ipoib_neigh);
+
+ /*
+ * Set the full membership bit, so that we join the right
+ * broadcast group, etc.
+ */
+ priv->pkey |= 0x8000;
+
+ ndev->broadcast[8] = priv->pkey >> 8;
+ ndev->broadcast[9] = priv->pkey & 0xff;
+ set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
+
+ ipoib_set_dev_features(priv);
+
+ rc = ipoib_dev_init(ndev);
+ if (rc) {
+ pr_warn("%s: failed to initialize device: %s port %d (ret = %d)\n",
+ priv->ca->name, priv->dev->name, priv->port, rc);
+ }
+
+ return 0;
+}
+