IB/Verbs: Use management helper rdma_cap_eth_ah()

Introduce helper rdma_cap_eth_ah() to help us check if the port of an
IB device support Ethernet Address Handler.

Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/cma.c

@@ -711,7 +711,7 @@ static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
 	int ret;
 	u16 pkey;
 
-	if (rdma_protocol_iboe(id_priv->id.device, id_priv->id.port_num))
+	if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
 		pkey = 0xffff;
 	else
 		pkey = ib_addr_get_pkey(dev_addr);

drivers/infiniband/core/sa_query.c

@@ -540,7 +540,7 @@ int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
 	ah_attr->port_num = port_num;
 	ah_attr->static_rate = rec->rate;
 
-	force_grh = rdma_protocol_iboe(device, port_num);
+	force_grh = rdma_cap_eth_ah(device, port_num);
 
 	if (rec->hop_limit > 1 || force_grh) {
 		ah_attr->ah_flags = IB_AH_GRH;

drivers/infiniband/core/verbs.c

@@ -200,7 +200,7 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
 	int ret;
 
 	memset(ah_attr, 0, sizeof *ah_attr);
-	if (rdma_protocol_iboe(device, port_num)) {
+	if (rdma_cap_eth_ah(device, port_num)) {
 		if (!(wc->wc_flags & IB_WC_GRH))
 			return -EPROTOTYPE;
 
@@ -869,7 +869,7 @@ int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
 	union ib_gid  sgid;
 
 	if ((*qp_attr_mask & IB_QP_AV)  &&
-	    (rdma_protocol_iboe(qp->device, qp_attr->ah_attr.port_num))) {
+	    (rdma_cap_eth_ah(qp->device, qp_attr->ah_attr.port_num))) {
 		ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
 				   qp_attr->ah_attr.grh.sgid_index, &sgid);
 		if (ret)

include/rdma/ib_verbs.h

@@ -1879,6 +1879,21 @@ static inline bool rdma_cap_af_ib(struct ib_device *device, u8 port_num)
 	return rdma_ib_or_iboe(device, port_num);
 }
 
+/**
+ * rdma_cap_eth_ah - Check if the port of device has the capability
+ * Ethernet Address Handler.
+ *
+ * @device: Device to be checked
+ * @port_num: Port number of the device
+ *
+ * Return false when port of the device don't support
+ * Ethernet Address Handler.
+ */
+static inline bool rdma_cap_eth_ah(struct ib_device *device, u8 port_num)
+{
+	return rdma_protocol_iboe(device, port_num);
+}
+
 /**
  * rdma_cap_read_multi_sge - Check if the port of device has the capability
  * RDMA Read Multiple Scatter-Gather Entries.