diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
index 476abc74178e..350ea2bab78a 100644
--- a/drivers/infiniband/core/iwcm.c
+++ b/drivers/infiniband/core/iwcm.c
@@ -87,7 +87,8 @@ static struct rdma_nl_cbs iwcm_nl_cb_table[RDMA_NL_IWPM_NUM_OPS] = {
 	[RDMA_NL_IWPM_REMOTE_INFO] = {.dump = iwpm_remote_info_cb},
 	[RDMA_NL_IWPM_HANDLE_ERR] = {.dump = iwpm_mapping_error_cb},
 	[RDMA_NL_IWPM_MAPINFO] = {.dump = iwpm_mapping_info_cb},
-	[RDMA_NL_IWPM_MAPINFO_NUM] = {.dump = iwpm_ack_mapping_info_cb}
+	[RDMA_NL_IWPM_MAPINFO_NUM] = {.dump = iwpm_ack_mapping_info_cb},
+	[RDMA_NL_IWPM_HELLO] = {.dump = iwpm_hello_cb}
 };
 
 static struct workqueue_struct *iwcm_wq;
@@ -525,6 +526,8 @@ static int iw_cm_map(struct iw_cm_id *cm_id, bool active)
 	cm_id->mapped = true;
 	pm_msg.loc_addr = cm_id->local_addr;
 	pm_msg.rem_addr = cm_id->remote_addr;
+	pm_msg.flags = (cm_id->device->iwcm->driver_flags & IW_F_NO_PORT_MAP) ?
+		       IWPM_FLAGS_NO_PORT_MAP : 0;
 	if (active)
 		status = iwpm_add_and_query_mapping(&pm_msg,
 						    RDMA_NL_IWCM);
@@ -543,7 +546,7 @@ static int iw_cm_map(struct iw_cm_id *cm_id, bool active)
 
 	return iwpm_create_mapinfo(&cm_id->local_addr,
 				   &cm_id->m_local_addr,
-				   RDMA_NL_IWCM);
+				   RDMA_NL_IWCM, pm_msg.flags);
 }
 
 /*
diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/iwpm_msg.c
index 3a8753595c8f..2e30e65b0816 100644
--- a/drivers/infiniband/core/iwpm_msg.c
+++ b/drivers/infiniband/core/iwpm_msg.c
@@ -34,7 +34,7 @@
 #include "iwpm_util.h"
 
 static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
-static int iwpm_ulib_version = 3;
+u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
 static int iwpm_user_pid = IWPM_PID_UNDEFINED;
 static atomic_t echo_nlmsg_seq;
 
@@ -130,6 +130,7 @@ pid_query_error:
  * nlmsg attributes:
  *	[IWPM_NLA_MANAGE_MAPPING_SEQ]
  *	[IWPM_NLA_MANAGE_ADDR]
+ *	[IWPM_NLA_MANAGE_FLAGS]
  */
 int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 {
@@ -173,6 +174,18 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 	if (ret)
 		goto add_mapping_error;
 
+	/* If flags are required and we're not V4, then return a quiet error */
+	if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
+		ret = -EINVAL;
+		goto add_mapping_error_nowarn;
+	}
+	if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
+		ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
+				IWPM_NLA_MANAGE_FLAGS);
+		if (ret)
+			goto add_mapping_error;
+	}
+
 	nlmsg_end(skb, nlh);
 	nlmsg_request->req_buffer = pm_msg;
 
@@ -187,6 +200,7 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 	return ret;
 add_mapping_error:
 	pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
+add_mapping_error_nowarn:
 	if (skb)
 		dev_kfree_skb(skb);
 	if (nlmsg_request)
@@ -201,6 +215,7 @@ add_mapping_error:
  *	[IWPM_NLA_QUERY_MAPPING_SEQ]
  *	[IWPM_NLA_QUERY_LOCAL_ADDR]
  *	[IWPM_NLA_QUERY_REMOTE_ADDR]
+ *	[IWPM_NLA_QUERY_FLAGS]
  */
 int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 {
@@ -251,6 +266,18 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 	if (ret)
 		goto query_mapping_error;
 
+	/* If flags are required and we're not V4, then return a quite error */
+	if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
+		ret = -EINVAL;
+		goto query_mapping_error_nowarn;
+	}
+	if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
+		ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
+				IWPM_NLA_QUERY_FLAGS);
+		if (ret)
+			goto query_mapping_error;
+	}
+
 	nlmsg_end(skb, nlh);
 	nlmsg_request->req_buffer = pm_msg;
 
@@ -264,6 +291,7 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 	return ret;
 query_mapping_error:
 	pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
+query_mapping_error_nowarn:
 	if (skb)
 		dev_kfree_skb(skb);
 	if (nlmsg_request)
@@ -379,7 +407,7 @@ int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
 	/* check device name, ulib name and version */
 	if (strcmp(pm_msg->dev_name, dev_name) ||
 			strcmp(iwpm_ulib_name, iwpm_name) ||
-			iwpm_version != iwpm_ulib_version) {
+			iwpm_version < IWPM_UABI_VERSION_MIN) {
 
 		pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n",
 				__func__, dev_name, iwpm_name, iwpm_version);
@@ -387,6 +415,10 @@ int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
 		goto register_pid_response_exit;
 	}
 	iwpm_user_pid = cb->nlh->nlmsg_pid;
+	iwpm_ulib_version = iwpm_version;
+	if (iwpm_ulib_version < IWPM_UABI_VERSION)
+		pr_warn_once("%s: Down level iwpmd/pid %u.  Continuing...",
+			__func__, iwpm_user_pid);
 	atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
 	pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
 			__func__, iwpm_user_pid);
@@ -661,7 +693,7 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
 	iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
 	iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
 	if (strcmp(iwpm_ulib_name, iwpm_name) ||
-			iwpm_version != iwpm_ulib_version) {
+			iwpm_version < IWPM_UABI_VERSION_MIN) {
 		pr_info("%s: Invalid port mapper name = %s version = %d\n",
 				__func__, iwpm_name, iwpm_version);
 		return ret;
@@ -675,6 +707,11 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
 	iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
 	atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
 	iwpm_user_pid = cb->nlh->nlmsg_pid;
+
+	if (iwpm_ulib_version < IWPM_UABI_VERSION)
+		pr_warn_once("%s: Down level iwpmd/pid %u.  Continuing...",
+			__func__, iwpm_user_pid);
+
 	if (!iwpm_mapinfo_available())
 		return 0;
 	pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
@@ -754,3 +791,40 @@ int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
 	up(&nlmsg_request->sem);
 	return 0;
 }
+
+/* netlink attribute policy for the received hello request */
+static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
+	[IWPM_NLA_HELLO_ABI_VERSION]     = { .type = NLA_U16 }
+};
+
+/*
+ * iwpm_hello_cb - Process a port mapper hello request
+ */
+int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
+	const char *msg_type = "Hello request";
+	u8 nl_client;
+	u16 abi_version;
+	int ret = -EINVAL;
+
+	if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
+			     msg_type)) {
+		pr_info("%s: Unable to parse nlmsg\n", __func__);
+		return ret;
+	}
+	abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
+	nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
+	if (!iwpm_valid_client(nl_client)) {
+		pr_info("%s: Invalid port mapper client = %d\n",
+				__func__, nl_client);
+		return ret;
+	}
+	iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
+	atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
+	iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
+	pr_debug("Using ABI version %u\n", iwpm_ulib_version);
+	iwpm_user_pid = cb->nlh->nlmsg_pid;
+	ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
+	return ret;
+}
diff --git a/drivers/infiniband/core/iwpm_util.c b/drivers/infiniband/core/iwpm_util.c
index cdb63f3f4de7..363938435476 100644
--- a/drivers/infiniband/core/iwpm_util.c
+++ b/drivers/infiniband/core/iwpm_util.c
@@ -114,7 +114,7 @@ static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *,
 
 int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
 			struct sockaddr_storage *mapped_sockaddr,
-			u8 nl_client)
+			u8 nl_client, u32 map_flags)
 {
 	struct hlist_head *hash_bucket_head = NULL;
 	struct iwpm_mapping_info *map_info;
@@ -132,6 +132,7 @@ int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
 	memcpy(&map_info->mapped_sockaddr, mapped_sockaddr,
 	       sizeof(struct sockaddr_storage));
 	map_info->nl_client = nl_client;
+	map_info->map_flags = map_flags;
 
 	spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
 	if (iwpm_hash_bucket) {
@@ -686,6 +687,14 @@ int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid)
 			if (ret)
 				goto send_mapping_info_unlock;
 
+			if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
+				ret = ibnl_put_attr(skb, nlh, sizeof(u32),
+						&map_info->map_flags,
+						IWPM_NLA_MAPINFO_FLAGS);
+				if (ret)
+					goto send_mapping_info_unlock;
+			}
+
 			nlmsg_end(skb, nlh);
 
 			iwpm_print_sockaddr(&map_info->local_sockaddr,
@@ -754,3 +763,40 @@ int iwpm_mapinfo_available(void)
 	spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
 	return full_bucket;
 }
+
+int iwpm_send_hello(u8 nl_client, int iwpm_pid, u16 abi_version)
+{
+	struct sk_buff *skb = NULL;
+	struct nlmsghdr *nlh;
+	u32 msg_seq;
+	const char *err_str = "";
+	int ret = -EINVAL;
+
+	skb = iwpm_create_nlmsg(RDMA_NL_IWPM_HELLO, &nlh, nl_client);
+	if (!skb) {
+		err_str = "Unable to create a nlmsg";
+		goto hello_num_error;
+	}
+	nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
+	msg_seq = 0;
+	err_str = "Unable to put attribute of abi_version into nlmsg";
+	ret = ibnl_put_attr(skb, nlh, sizeof(u16), &abi_version,
+			    IWPM_NLA_HELLO_ABI_VERSION);
+	if (ret)
+		goto hello_num_error;
+	nlmsg_end(skb, nlh);
+
+	ret = rdma_nl_unicast(skb, iwpm_pid);
+	if (ret) {
+		skb = NULL;
+		err_str = "Unable to send a nlmsg";
+		goto hello_num_error;
+	}
+	pr_debug("%s: Sent hello abi_version = %u\n", __func__, abi_version);
+	return 0;
+hello_num_error:
+	pr_info("%s: %s\n", __func__, err_str);
+	if (skb)
+		dev_kfree_skb(skb);
+	return ret;
+}
diff --git a/drivers/infiniband/core/iwpm_util.h b/drivers/infiniband/core/iwpm_util.h
index af1fc14a0d3d..7e2bcc72f66c 100644
--- a/drivers/infiniband/core/iwpm_util.h
+++ b/drivers/infiniband/core/iwpm_util.h
@@ -78,6 +78,7 @@ struct iwpm_mapping_info {
 	struct sockaddr_storage local_sockaddr;
 	struct sockaddr_storage mapped_sockaddr;
 	u8     nl_client;
+	u32    map_flags;
 };
 
 struct iwpm_remote_info {
@@ -266,4 +267,15 @@ int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
  * @msg: Message to print
  */
 void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg);
+
+/**
+ * iwpm_send_hello - Send hello response to iwpmd
+ *
+ * @nl_client: The index of the netlink client
+ * @abi_version: The kernel's abi_version
+ *
+ * Returns 0 on success or a negative error code
+ */
+int iwpm_send_hello(u8 nl_client, int iwpm_pid, u16 abi_version);
+extern u16 iwpm_ulib_version;
 #endif
diff --git a/include/rdma/iw_cm.h b/include/rdma/iw_cm.h
index 5cd7701db148..48512abd3162 100644
--- a/include/rdma/iw_cm.h
+++ b/include/rdma/iw_cm.h
@@ -105,6 +105,18 @@ struct iw_cm_conn_param {
 	u32 qpn;
 };
 
+enum iw_flags {
+
+	/*
+	 * This flag allows the iwcm and iwpmd to still advertise
+	 * mappings but the real and mapped port numbers are the
+	 * same.  Further, iwpmd will not bind any user socket to
+	 * reserve the port.  This is required for soft iwarp
+	 * to play in the port mapped iwarp space.
+	 */
+	IW_F_NO_PORT_MAP = (1 << 0),
+};
+
 struct iw_cm_verbs {
 	void		(*add_ref)(struct ib_qp *qp);
 
@@ -127,6 +139,7 @@ struct iw_cm_verbs {
 
 	int		(*destroy_listen)(struct iw_cm_id *cm_id);
 	char		ifname[IFNAMSIZ];
+	enum iw_flags	driver_flags;
 };
 
 /**
diff --git a/include/rdma/iw_portmap.h b/include/rdma/iw_portmap.h
index fda31673a562..84fac196ef80 100644
--- a/include/rdma/iw_portmap.h
+++ b/include/rdma/iw_portmap.h
@@ -58,6 +58,7 @@ struct iwpm_sa_data {
 	struct sockaddr_storage mapped_loc_addr;
 	struct sockaddr_storage rem_addr;
 	struct sockaddr_storage mapped_rem_addr;
+	u32 flags;
 };
 
 /**
@@ -205,9 +206,11 @@ int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
  * @local_addr: Local ip/tcp address
  * @mapped_addr: Mapped local ip/tcp address
  * @nl_client: The index of the netlink client
+ * @map_flags: IWPM mapping flags
  */
 int iwpm_create_mapinfo(struct sockaddr_storage *local_addr,
-			struct sockaddr_storage *mapped_addr, u8 nl_client);
+			struct sockaddr_storage *mapped_addr, u8 nl_client,
+			u32 map_flags);
 
 /**
  * iwpm_remove_mapinfo - Remove local and mapped IPv4/IPv6 address
@@ -221,4 +224,14 @@ int iwpm_create_mapinfo(struct sockaddr_storage *local_addr,
 int iwpm_remove_mapinfo(struct sockaddr_storage *local_addr,
 			struct sockaddr_storage *mapped_addr);
 
+/**
+ * iwpm_hello_cb - Process a hello message from iwpmd
+ *
+ * @skb:
+ * @cb: Contains the received message (payload and netlink header)
+ *
+ * Using the received port mapper pid, send the kernel's abi_version
+ * after adjusting it to support the iwpmd version.
+ */
+int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb);
 #endif /* _IW_PORTMAP_H */
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 42d53e182d5f..0f5263767fb4 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -35,6 +35,19 @@ enum {
 	RDMA_NL_RDMA_CM_NUM_ATTR,
 };
 
+/* The minimum version that the iwpm kernel supports */
+#define IWPM_UABI_VERSION_MIN	3
+
+/* The latest version that the iwpm kernel supports */
+#define IWPM_UABI_VERSION	4
+
+/* iwarp port mapper message flags */
+enum {
+
+	/* Do not map the port for this IWPM request */
+	IWPM_FLAGS_NO_PORT_MAP = (1 << 0),
+};
+
 /* iwarp port mapper op-codes */
 enum {
 	RDMA_NL_IWPM_REG_PID = 0,
@@ -45,6 +58,7 @@ enum {
 	RDMA_NL_IWPM_HANDLE_ERR,
 	RDMA_NL_IWPM_MAPINFO,
 	RDMA_NL_IWPM_MAPINFO_NUM,
+	RDMA_NL_IWPM_HELLO,
 	RDMA_NL_IWPM_NUM_OPS
 };
 
@@ -83,6 +97,7 @@ enum {
 	IWPM_NLA_MANAGE_MAPPING_UNSPEC = 0,
 	IWPM_NLA_MANAGE_MAPPING_SEQ,
 	IWPM_NLA_MANAGE_ADDR,
+	IWPM_NLA_MANAGE_FLAGS,
 	IWPM_NLA_MANAGE_MAPPING_MAX
 };
 
@@ -98,12 +113,14 @@ enum {
 };
 
 #define IWPM_NLA_MAPINFO_SEND_MAX   3
+#define IWPM_NLA_REMOVE_MAPPING_MAX 3
 
 enum {
 	IWPM_NLA_QUERY_MAPPING_UNSPEC = 0,
 	IWPM_NLA_QUERY_MAPPING_SEQ,
 	IWPM_NLA_QUERY_LOCAL_ADDR,
 	IWPM_NLA_QUERY_REMOTE_ADDR,
+	IWPM_NLA_QUERY_FLAGS,
 	IWPM_NLA_QUERY_MAPPING_MAX,
 };
 
@@ -129,6 +146,7 @@ enum {
 	IWPM_NLA_MAPINFO_UNSPEC = 0,
 	IWPM_NLA_MAPINFO_LOCAL_ADDR,
 	IWPM_NLA_MAPINFO_MAPPED_ADDR,
+	IWPM_NLA_MAPINFO_FLAGS,
 	IWPM_NLA_MAPINFO_MAX
 };
 
@@ -147,6 +165,12 @@ enum {
 	IWPM_NLA_ERR_MAX
 };
 
+enum {
+	IWPM_NLA_HELLO_UNSPEC = 0,
+	IWPM_NLA_HELLO_ABI_VERSION,
+	IWPM_NLA_HELLO_MAX
+};
+
 /*
  * Local service operations:
  *   RESOLVE - The client requests the local service to resolve a path.