IB/core: Change ib_resolve_eth_dmac to use it in create AH

The function ib_resolve_eth_dmac() requires struct qp_attr * and
qp_attr_mask as parameters while the function might be useful to resolve
dmac for address handles. This patch changes the signature of the
function so it can be used in the flow of creating an address handle.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/core_priv.h

@@ -72,9 +72,6 @@ void ib_device_unregister_sysfs(struct ib_device *device);
 void ib_cache_setup(void);
 void ib_cache_cleanup(void);
 
-int ib_resolve_eth_dmac(struct ib_qp *qp,
-			struct ib_qp_attr *qp_attr, int *qp_attr_mask);
-
 typedef void (*roce_netdev_callback)(struct ib_device *device, u8 port,
 	      struct net_device *idev, void *cookie);
 

drivers/infiniband/core/uverbs_cmd.c

@@ -2402,9 +2402,11 @@ ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
 	attr->alt_ah_attr.port_num 	    = cmd.alt_dest.port_num;
 
 	if (qp->real_qp == qp) {
-		ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask);
+		if (cmd.attr_mask & IB_QP_AV) {
+			ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
 			if (ret)
 				goto release_qp;
+		}
 		ret = qp->device->modify_qp(qp, attr,
 			modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
 	} else {

drivers/infiniband/core/verbs.c

@@ -1198,31 +1198,30 @@ int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
 }
 EXPORT_SYMBOL(ib_modify_qp_is_ok);
 
-int ib_resolve_eth_dmac(struct ib_qp *qp,
-			struct ib_qp_attr *qp_attr, int *qp_attr_mask)
+int ib_resolve_eth_dmac(struct ib_device *device,
+			struct ib_ah_attr *ah_attr)
 {
 	int           ret = 0;
 
-	if (*qp_attr_mask & IB_QP_AV) {
-		if (qp_attr->ah_attr.port_num < rdma_start_port(qp->device) ||
-		    qp_attr->ah_attr.port_num > rdma_end_port(qp->device))
+	if (ah_attr->port_num < rdma_start_port(device) ||
+	    ah_attr->port_num > rdma_end_port(device))
 		return -EINVAL;
 
-		if (!rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))
+	if (!rdma_cap_eth_ah(device, ah_attr->port_num))
 		return 0;
 
-		if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
-			rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw,
-					qp_attr->ah_attr.dmac);
+	if (rdma_link_local_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
+		rdma_get_ll_mac((struct in6_addr *)ah_attr->grh.dgid.raw,
+				ah_attr->dmac);
 	} else {
 		union ib_gid		sgid;
 		struct ib_gid_attr	sgid_attr;
 		int			ifindex;
 		int			hop_limit;
 
-			ret = ib_query_gid(qp->device,
-					   qp_attr->ah_attr.port_num,
-					   qp_attr->ah_attr.grh.sgid_index,
+		ret = ib_query_gid(device,
+				   ah_attr->port_num,
+				   ah_attr->grh.sgid_index,
 				   &sgid, &sgid_attr);
 
 		if (ret || !sgid_attr.ndev) {
@@ -1234,30 +1233,31 @@ int ib_resolve_eth_dmac(struct ib_qp *qp,
 		ifindex = sgid_attr.ndev->ifindex;
 
 		ret = rdma_addr_find_l2_eth_by_grh(&sgid,
-							   &qp_attr->ah_attr.grh.dgid,
-							   qp_attr->ah_attr.dmac,
+						   &ah_attr->grh.dgid,
+						   ah_attr->dmac,
 						   NULL, &ifindex, &hop_limit);
 
 		dev_put(sgid_attr.ndev);
 
-			qp_attr->ah_attr.grh.hop_limit = hop_limit;
-		}
+		ah_attr->grh.hop_limit = hop_limit;
 	}
 out:
 	return ret;
 }
 EXPORT_SYMBOL(ib_resolve_eth_dmac);
 
-
 int ib_modify_qp(struct ib_qp *qp,
 		 struct ib_qp_attr *qp_attr,
 		 int qp_attr_mask)
 {
+
+	if (qp_attr_mask & IB_QP_AV) {
 		int ret;
 
-	ret = ib_resolve_eth_dmac(qp, qp_attr, &qp_attr_mask);
+		ret = ib_resolve_eth_dmac(qp->device, &qp_attr->ah_attr);
 		if (ret)
 			return ret;
+	}
 
 	return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
 }

include/rdma/ib_verbs.h

@@ -3394,4 +3394,6 @@ void ib_drain_rq(struct ib_qp *qp);
 void ib_drain_sq(struct ib_qp *qp);
 void ib_drain_qp(struct ib_qp *qp);
 
+int ib_resolve_eth_dmac(struct ib_device *device,
+			struct ib_ah_attr *ah_attr);
 #endif /* IB_VERBS_H */