[infiniband] Provide ib_get_hca_info() as a commonly-available function

src/include/gpxe/ib_mad.h

 	uint8_t class_version;
 	uint8_t node_type;
 	uint8_t num_ports;
-	uint8_t sys_guid[8];
-	uint8_t node_guid[8];
-	uint8_t port_guid[8];
+	struct ib_gid_half sys_guid;
+	struct ib_gid_half node_guid;
+	struct ib_gid_half port_guid;
 	uint16_t partition_cap;
 	uint16_t device_id;
 	uint32_t revision;

src/include/gpxe/infiniband.h

 			     struct ib_gid *gid );
 extern void ib_mcast_detach ( struct ib_device *ibdev,
 			      struct ib_queue_pair *qp, struct ib_gid *gid );
+extern int ib_get_hca_info ( struct ib_device *ibdev,
+			     struct ib_gid_half *hca_guid );
 extern struct ib_device * alloc_ibdev ( size_t priv_size );
 extern int register_ibdev ( struct ib_device *ibdev );
 extern void unregister_ibdev ( struct ib_device *ibdev );

src/net/infiniband.c

 	}
 }
 
+/**
+ * Get Infiniband HCA information
+ *
+ * @v ibdev		Infiniband device
+ * @ret hca_guid	HCA GUID
+ * @ret num_ports	Number of ports
+ */
+int ib_get_hca_info ( struct ib_device *ibdev,
+		      struct ib_gid_half *hca_guid ) {
+	struct ib_device *tmp;
+	int num_ports = 0;
+
+	/* Search for IB devices with the same physical device to
+	 * identify port count and a suitable Node GUID.
+	 */
+	for_each_ibdev ( tmp ) {
+		if ( tmp->dev != ibdev->dev )
+			continue;
+		if ( num_ports == 0 ) {
+			memcpy ( hca_guid, &tmp->gid.u.half[1],
+				 sizeof ( *hca_guid ) );
+		}
+		num_ports++;
+	}
+	return num_ports;
+}
 
 /***************************************************************************
  *

src/net/infiniband/ib_sma.c

 				   union ib_smp_data *get ) {
 	struct ib_device *ibdev = sma->ibdev;
 	struct ib_node_info *node_info = &get->node_info;
-	struct ib_device *tmp;
 
 	memset ( node_info, 0, sizeof ( *node_info ) );
 	node_info->base_version = IB_MGMT_BASE_VERSION;
 	node_info->class_version = IB_SMP_CLASS_VERSION;
 	node_info->node_type = IB_NODE_TYPE_HCA;
-	/* Search for IB devices with the same physical device to
-	 * identify port count and a suitable Node GUID.
-	 */
-	for_each_ibdev ( tmp ) {
-		if ( tmp->dev != ibdev->dev )
-			continue;
-		if ( node_info->num_ports == 0 ) {
-			memcpy ( node_info->sys_guid, &tmp->gid.u.half[1],
-				 sizeof ( node_info->sys_guid ) );
-			memcpy ( node_info->node_guid, &tmp->gid.u.half[1],
-				 sizeof ( node_info->node_guid ) );
-		}
-		node_info->num_ports++;
-	}
-	memcpy ( node_info->port_guid, &ibdev->gid.u.half[1],
+	node_info->num_ports = ib_get_hca_info ( ibdev, &node_info->sys_guid );
+	memcpy ( &node_info->node_guid, &node_info->sys_guid,
+		 sizeof ( node_info->node_guid ) );
+	memcpy ( &node_info->port_guid, &ibdev->gid.u.half[1],
 		 sizeof ( node_info->port_guid ) );
 	node_info->partition_cap = htons ( 1 );
 	node_info->local_port_num = ibdev->port;