i40iw: add connection management code
authorFaisal Latif <faisal.latif@intel.com>
Wed, 20 Jan 2016 19:40:04 +0000 (13:40 -0600)
committerDoug Ledford <dledford@redhat.com>
Mon, 29 Feb 2016 22:10:53 +0000 (17:10 -0500)
i40iw_cm.c i40iw_cm.h are used for connection management.

changes since v2:
        Implemented interface changes as reg_phys_mr() is
        not part of inifiniband interface  Done as
        Christoph Hellwig <hch@infradead.org> did for nes.

Changes since v1:
        improved casts
        moved kmap() from i40iw_verbs.c to make them short
        lived.

Acked-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/i40iw/i40iw_cm.c [new file with mode: 0644]
drivers/infiniband/hw/i40iw/i40iw_cm.h [new file with mode: 0644]

diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c
new file mode 100644 (file)
index 0000000..0589bd1
--- /dev/null
@@ -0,0 +1,4442 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
+*
+* This software is available to you under a choice of one of two
+* licenses.  You may choose to be licensed under the terms of the GNU
+* General Public License (GPL) Version 2, available from the file
+* COPYING in the main directory of this source tree, or the
+* OpenFabrics.org BSD license below:
+*
+*   Redistribution and use in source and binary forms, with or
+*   without modification, are permitted provided that the following
+*   conditions are met:
+*
+*    - Redistributions of source code must retain the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer.
+*
+*    - Redistributions in binary form must reproduce the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer in the documentation and/or other materials
+*      provided with the distribution.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+*******************************************************************************/
+
+#include <linux/atomic.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+#include <linux/notifier.h>
+#include <linux/net.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/random.h>
+#include <linux/list.h>
+#include <linux/threads.h>
+#include <linux/highmem.h>
+#include <net/arp.h>
+#include <net/ndisc.h>
+#include <net/neighbour.h>
+#include <net/route.h>
+#include <net/addrconf.h>
+#include <net/ip6_route.h>
+#include <net/ip_fib.h>
+#include <net/tcp.h>
+#include <asm/checksum.h>
+
+#include "i40iw.h"
+
+static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *);
+static void i40iw_cm_post_event(struct i40iw_cm_event *event);
+static void i40iw_disconnect_worker(struct work_struct *work);
+
+/**
+ * i40iw_free_sqbuf - put back puda buffer if refcount = 0
+ * @dev: FPK device
+ * @buf: puda buffer to free
+ */
+void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp)
+{
+       struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp;
+       struct i40iw_puda_rsrc *ilq = dev->ilq;
+
+       if (!atomic_dec_return(&buf->refcount))
+               i40iw_puda_ret_bufpool(ilq, buf);
+}
+
+/**
+ * i40iw_derive_hw_ird_setting - Calculate IRD
+ *
+ * @cm_ird: IRD of connection's node
+ *
+ * The ird from the connection is rounded to a supported HW
+ * setting (2,8,32,64) and then encoded for ird_size field of
+ * qp_ctx
+ */
+static u8 i40iw_derive_hw_ird_setting(u16 cm_ird)
+{
+       u8 encoded_ird_size;
+       u8 pof2_cm_ird = 1;
+
+       /* round-off to next powerof2 */
+       while (pof2_cm_ird < cm_ird)
+               pof2_cm_ird *= 2;
+
+       /* ird_size field is encoded in qp_ctx */
+       switch (pof2_cm_ird) {
+       case I40IW_HW_IRD_SETTING_64:
+               encoded_ird_size = 3;
+               break;
+       case I40IW_HW_IRD_SETTING_32:
+       case I40IW_HW_IRD_SETTING_16:
+               encoded_ird_size = 2;
+               break;
+       case I40IW_HW_IRD_SETTING_8:
+       case I40IW_HW_IRD_SETTING_4:
+               encoded_ird_size = 1;
+               break;
+       case I40IW_HW_IRD_SETTING_2:
+       default:
+               encoded_ird_size = 0;
+               break;
+       }
+       return encoded_ird_size;
+}
+
+/**
+ * i40iw_record_ird_ord - Record IRD/ORD passed in
+ * @cm_node: connection's node
+ * @conn_ird: connection IRD
+ * @conn_ord: connection ORD
+ */
+static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord)
+{
+       if (conn_ird > I40IW_MAX_IRD_SIZE)
+               conn_ird = I40IW_MAX_IRD_SIZE;
+
+       if (conn_ord > I40IW_MAX_ORD_SIZE)
+               conn_ord = I40IW_MAX_ORD_SIZE;
+
+       cm_node->ird_size = conn_ird;
+       cm_node->ord_size = conn_ord;
+}
+
+/**
+ * i40iw_copy_ip_ntohl - change network to host ip
+ * @dst: host ip
+ * @src: big endian
+ */
+void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src)
+{
+       *dst++ = ntohl(*src++);
+       *dst++ = ntohl(*src++);
+       *dst++ = ntohl(*src++);
+       *dst = ntohl(*src);
+}
+
+/**
+ * i40iw_copy_ip_htonl - change host addr to network ip
+ * @dst: host ip
+ * @src: little endian
+ */
+static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src)
+{
+       *dst++ = htonl(*src++);
+       *dst++ = htonl(*src++);
+       *dst++ = htonl(*src++);
+       *dst = htonl(*src);
+}
+
+/**
+ * i40iw_fill_sockaddr4 - get addr info for passive connection
+ * @cm_node: connection's node
+ * @event: upper layer's cm event
+ */
+static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node,
+                                       struct iw_cm_event *event)
+{
+       struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr;
+       struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr;
+
+       laddr->sin_family = AF_INET;
+       raddr->sin_family = AF_INET;
+
+       laddr->sin_port = htons(cm_node->loc_port);
+       raddr->sin_port = htons(cm_node->rem_port);
+
+       laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]);
+       raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]);
+}
+
+/**
+ * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side
+ * @cm_node: connection's node
+ * @event: upper layer's cm event
+ */
+static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node,
+                                       struct iw_cm_event *event)
+{
+       struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr;
+       struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr;
+
+       laddr6->sin6_family = AF_INET6;
+       raddr6->sin6_family = AF_INET6;
+
+       laddr6->sin6_port = htons(cm_node->loc_port);
+       raddr6->sin6_port = htons(cm_node->rem_port);
+
+       i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32,
+                           cm_node->loc_addr);
+       i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32,
+                           cm_node->rem_addr);
+}
+
+/**
+ * i40iw_set_sockaddr - Record ip addr and tcp port in a sockaddr storage
+ * @ip_addr: v4/v6 ip addr
+ * @port: tcp port
+ * @addr: sockaddr to store ip/tcp info
+ */
+static void i40iw_set_sockaddr(u32 *ip_addr,
+                              u16 port,
+                              struct sockaddr_storage *addr,
+                              bool ipv4)
+{
+       if (ipv4) {
+               struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
+
+               in4_addr->sin_family = AF_INET;
+               in4_addr->sin_addr.s_addr = htonl(ip_addr[0]);
+               in4_addr->sin_port = htons(port);
+       } else {
+               struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
+
+               in6_addr->sin6_family = AF_INET6;
+               i40iw_copy_ip_htonl(in6_addr->sin6_addr.in6_u.u6_addr32,
+                                   ip_addr);
+               in6_addr->sin6_port = htons(port);
+       }
+}
+
+/**
+ * i40iw_get_sockaddr - Get ip addr and tcp port from a sockaddr storage
+ * @addr: sockaddr to get ip/tcp info
+ * @ip_addr: v4/v6 ip addr
+ * @port: tcp port
+ */
+static void i40iw_get_addrinfo(struct sockaddr_storage *addr, u32 *ip_addr, u16 *port)
+{
+       if (addr->ss_family == AF_INET) {
+               struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
+
+               ip_addr[0] = ntohl(in4_addr->sin_addr.s_addr);
+               *port = ntohs(in4_addr->sin_port);
+       } else {
+               struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
+
+               i40iw_copy_ip_ntohl(ip_addr,
+                                   in6_addr->sin6_addr.in6_u.u6_addr32);
+               *port = ntohs(in6_addr->sin6_port);
+       }
+}
+
+/**
+ * i40iw_is_wildcard - Check if it is a wildcard ip address
+ * @addr: sockaddr containing the ip to check
+ */
+static bool i40iw_is_wildcard(struct sockaddr_storage *addr)
+{
+       if (addr->ss_family == AF_INET) {
+               struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr;
+
+               return (in4_addr->sin_addr.s_addr == INADDR_ANY);
+       } else {
+               struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr;
+
+               return (ipv6_addr_type(&in6_addr->sin6_addr) == IPV6_ADDR_ANY);
+       }
+}
+
+/**
+ * i40iw_create_mapinfo - Create a mapinfo object in the port mapper data base
+ * @cm_info: contains ip/tcp info
+ */
+static int i40iw_create_mapinfo(struct i40iw_cm_info *cm_info)
+{
+       struct sockaddr_storage local_sockaddr;
+       struct sockaddr_storage mapped_sockaddr;
+
+       i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
+                          &local_sockaddr, cm_info->ipv4);
+       i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port,
+                          &mapped_sockaddr, cm_info->ipv4);
+       return iwpm_create_mapinfo(&local_sockaddr,
+                                  &mapped_sockaddr,
+                                  RDMA_NL_I40IW);
+}
+
+/**
+ * i40iw_remove_mapinfo - Remove a mapinfo object
+ * @cm_info: contains ip/tcp info
+ *
+ * Removes a mapinfo object from the port mapper data base
+ * and sends a remove mapping message to the userspace port mapper
+ */
+static int i40iw_remove_mapinfo(struct i40iw_cm_info *cm_info)
+{
+       struct sockaddr_storage local_sockaddr;
+       struct sockaddr_storage mapped_sockaddr;
+
+       i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
+                          &local_sockaddr, cm_info->ipv4);
+       i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port,
+                          &mapped_sockaddr, cm_info->ipv4);
+
+       iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
+       return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_I40IW);
+}
+
+/**
+ * i40iw_form_reg_msg - Form a port mapper message with dev info
+ * @iwdev: iWarp device
+ * @pm_msg: msg to record device data
+ */
+static void i40iw_form_reg_msg(struct i40iw_device *iwdev, struct iwpm_dev_data *pm_msg)
+{
+       memcpy(pm_msg->dev_name, iwdev->iwibdev->ibdev.name, IWPM_DEVNAME_SIZE);
+       memcpy(pm_msg->if_name, iwdev->netdev->name, IWPM_IFNAME_SIZE);
+}
+
+/**
+ * i40iw_form_pm_msg - Form a port mapper message with mapping info
+ * @cm_info: contains ip/tcp info
+ * @pm_msg: msg to record ip/tcp info
+ */
+static void i40iw_form_pm_msg(struct i40iw_cm_info *cm_info,
+                             struct iwpm_sa_data *pm_msg)
+{
+       i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port,
+                          &pm_msg->loc_addr, cm_info->ipv4);
+       i40iw_set_sockaddr(cm_info->rem_addr, cm_info->rem_port,
+                          &pm_msg->rem_addr, cm_info->ipv4);
+}
+
+/**
+ * i40iw_record_pm_msg - Record the received mapping info
+ * @cm_info: ip/tcp info to be updated with mapped info
+ * @pm_msg: received msg with mapped ip/tcp
+ */
+static void i40iw_record_pm_msg(struct i40iw_cm_info *cm_info,
+                               struct iwpm_sa_data *pm_msg,
+                               bool remote)
+{
+       i40iw_get_addrinfo(&pm_msg->mapped_loc_addr,
+                          cm_info->map_loc_addr,
+                          &cm_info->map_loc_port);
+       if (remote) {
+               i40iw_get_addrinfo(&pm_msg->mapped_rem_addr,
+                                  cm_info->map_rem_addr, &cm_info->map_rem_port);
+               if (i40iw_is_wildcard(&pm_msg->mapped_rem_addr))
+                       memcpy(cm_info->map_rem_addr, cm_info->rem_addr,
+                              sizeof(cm_info->map_rem_addr));
+       }
+}
+
+/**
+ * i40iw_get_reminfo - Get the address info of the remote connecting peer
+ * @cm_node: provides mapped ip/tcp info (local and remote)
+ *
+ * Gets the actual non-mapped ip/tcp info of the remote connecting peer
+ * from the port mapper data base
+ */
+static int i40iw_get_remote_addr(struct i40iw_cm_node *cm_node)
+{
+       struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
+       struct sockaddr_storage remote_addr;
+       int ret;
+
+       i40iw_set_sockaddr(cm_node->map_loc_addr,
+                          cm_node->map_loc_port,
+                          &mapped_loc_addr,
+                          cm_node->ipv4);
+       i40iw_set_sockaddr(cm_node->map_rem_addr,
+                          cm_node->map_rem_port,
+                          &mapped_rem_addr,
+                          cm_node->ipv4);
+       ret = iwpm_get_remote_info(&mapped_loc_addr,
+                                  &mapped_rem_addr,
+                                  &remote_addr,
+                                  RDMA_NL_I40IW);
+       if (ret)
+               i40iw_debug(cm_node->dev,
+                           I40IW_DEBUG_CM,
+                           "Unable to find remote peer address info\n");
+       else
+               i40iw_get_addrinfo(&remote_addr,
+                                  cm_node->rem_addr,
+                                  &cm_node->rem_port);
+       return ret;
+}
+
+/**
+ * i40iw_init_mapinfo - Initialize the mapped ip/tcp info
+ * @cm_info: ip/tcp info (actual and mapped)
+*/
+static void i40iw_init_mapinfo(struct i40iw_cm_info *cm_info)
+{
+       memcpy(cm_info->map_loc_addr, cm_info->loc_addr,
+              sizeof(cm_info->map_loc_addr));
+       memcpy(cm_info->map_rem_addr, cm_info->rem_addr,
+              sizeof(cm_info->map_rem_addr));
+       cm_info->map_loc_port = cm_info->loc_port;
+       cm_info->map_rem_port = cm_info->rem_port;
+}
+
+/**
+ * i40iw_get_addr_info
+ * @cm_node: contains ip/tcp info
+ * @cm_info: to get a copy of the cm_node ip/tcp info
+*/
+static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node,
+                               struct i40iw_cm_info *cm_info)
+{
+       cm_info->ipv4 = cm_node->ipv4;
+       cm_info->vlan_id = cm_node->vlan_id;
+       memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr));
+       memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr));
+       memcpy(cm_info->map_loc_addr, cm_node->map_loc_addr, sizeof(cm_info->map_loc_addr));
+       memcpy(cm_info->map_rem_addr, cm_node->map_rem_addr, sizeof(cm_info->map_rem_addr));
+       cm_info->loc_port = cm_node->loc_port;
+       cm_info->rem_port = cm_node->rem_port;
+       cm_info->map_loc_port = cm_node->map_loc_port;
+       cm_info->map_rem_port = cm_node->map_rem_port;
+}
+
+/**
+ * i40iw_get_cmevent_info - for cm event upcall
+ * @cm_node: connection's node
+ * @cm_id: upper layers cm struct for the event
+ * @event: upper layer's cm event
+ */
+static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node,
+                                         struct iw_cm_id *cm_id,
+                                         struct iw_cm_event *event)
+{
+       memcpy(&event->local_addr, &cm_id->local_addr,
+              sizeof(event->local_addr));
+       memcpy(&event->remote_addr, &cm_id->remote_addr,
+              sizeof(event->remote_addr));
+       if (cm_node) {
+               event->private_data = (void *)cm_node->pdata_buf;
+               event->private_data_len = (u8)cm_node->pdata.size;
+               event->ird = cm_node->ird_size;
+               event->ord = cm_node->ord_size;
+       }
+}
+
+/**
+ * i40iw_send_cm_event - upcall cm's event handler
+ * @cm_node: connection's node
+ * @cm_id: upper layer's cm info struct
+ * @type: Event type to indicate
+ * @status: status for the event type
+ */
+static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node,
+                              struct iw_cm_id *cm_id,
+                              enum iw_cm_event_type type,
+                              int status)
+{
+       struct iw_cm_event event;
+
+       memset(&event, 0, sizeof(event));
+       event.event = type;
+       event.status = status;
+       switch (type) {
+       case IW_CM_EVENT_CONNECT_REQUEST:
+               if (cm_node->ipv4)
+                       i40iw_fill_sockaddr4(cm_node, &event);
+               else
+                       i40iw_fill_sockaddr6(cm_node, &event);
+               event.provider_data = (void *)cm_node;
+               event.private_data = (void *)cm_node->pdata_buf;
+               event.private_data_len = (u8)cm_node->pdata.size;
+               break;
+       case IW_CM_EVENT_CONNECT_REPLY:
+               i40iw_get_cmevent_info(cm_node, cm_id, &event);
+               break;
+       case IW_CM_EVENT_ESTABLISHED:
+               event.ird = cm_node->ird_size;
+               event.ord = cm_node->ord_size;
+               break;
+       case IW_CM_EVENT_DISCONNECT:
+               break;
+       case IW_CM_EVENT_CLOSE:
+               break;
+       default:
+               i40iw_pr_err("event type received type = %d\n", type);
+               return -1;
+       }
+       return cm_id->event_handler(cm_id, &event);
+}
+
+/**
+ * i40iw_create_event - create cm event
+ * @cm_node: connection's node
+ * @type: Event type to generate
+ */
+static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node,
+                                                enum i40iw_cm_event_type type)
+{
+       struct i40iw_cm_event *event;
+
+       if (!cm_node->cm_id)
+               return NULL;
+
+       event = kzalloc(sizeof(*event), GFP_ATOMIC);
+
+       if (!event)
+               return NULL;
+
+       event->type = type;
+       event->cm_node = cm_node;
+       memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr));
+       memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.loc_addr));
+       event->cm_info.rem_port = cm_node->rem_port;
+       event->cm_info.loc_port = cm_node->loc_port;
+       event->cm_info.cm_id = cm_node->cm_id;
+
+       i40iw_debug(cm_node->dev,
+                   I40IW_DEBUG_CM,
+                   "node=%p event=%p type=%u dst=%pI4 src=%pI4\n",
+                   cm_node,
+                   event,
+                   type,
+                   event->cm_info.loc_addr,
+                   event->cm_info.rem_addr);
+
+       i40iw_cm_post_event(event);
+       return event;
+}
+
+/**
+ * i40iw_free_retrans_entry - free send entry
+ * @cm_node: connection's node
+ */
+static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_sc_dev *dev = cm_node->dev;
+       struct i40iw_timer_entry *send_entry;
+
+       send_entry = cm_node->send_entry;
+       if (send_entry) {
+               cm_node->send_entry = NULL;
+               i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf);
+               kfree(send_entry);
+               atomic_dec(&cm_node->ref_count);
+       }
+}
+
+/**
+ * i40iw_cleanup_retrans_entry - free send entry with lock
+ * @cm_node: connection's node
+ */
+static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
+       i40iw_free_retrans_entry(cm_node);
+       spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
+}
+
+static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node)
+{
+       if ((cm_node->rem_mac[0] == 0x0) &&
+           (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) ||
+            ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43)))))
+               return true;
+       return false;
+}
+
+/**
+ * i40iw_form_cm_frame - get a free packet and build frame
+ * @cm_node: connection's node ionfo to use in frame
+ * @options: pointer to options info
+ * @hdr: pointer mpa header
+ * @pdata: pointer to private data
+ * @flags:  indicates FIN or ACK
+ */
+static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
+                                                 struct i40iw_kmem_info *options,
+                                                 struct i40iw_kmem_info *hdr,
+                                                 struct i40iw_kmem_info *pdata,
+                                                 u8 flags)
+{
+       struct i40iw_puda_buf *sqbuf;
+       struct i40iw_sc_dev *dev = cm_node->dev;
+       u8 *buf;
+
+       struct tcphdr *tcph;
+       struct iphdr *iph;
+       struct ipv6hdr *ip6h;
+       struct ethhdr *ethh;
+       u16 packetsize;
+       u16 eth_hlen = ETH_HLEN;
+       u32 opts_len = 0;
+       u32 pd_len = 0;
+       u32 hdr_len = 0;
+
+       sqbuf = i40iw_puda_get_bufpool(dev->ilq);
+       if (!sqbuf)
+               return NULL;
+       buf = sqbuf->mem.va;
+
+       if (options)
+               opts_len = (u32)options->size;
+
+       if (hdr)
+               hdr_len = hdr->size;
+
+       if (pdata) {
+               pd_len = pdata->size;
+               if (!is_remote_ne020_or_chelsio(cm_node))
+                       pd_len += MPA_ZERO_PAD_LEN;
+       }
+
+       if (cm_node->vlan_id < VLAN_TAG_PRESENT)
+               eth_hlen += 4;
+
+       if (cm_node->ipv4)
+               packetsize = sizeof(*iph) + sizeof(*tcph);
+       else
+               packetsize = sizeof(*ip6h) + sizeof(*tcph);
+       packetsize += opts_len + hdr_len + pd_len;
+
+       memset(buf, 0x00, eth_hlen + packetsize);
+
+       sqbuf->totallen = packetsize + eth_hlen;
+       sqbuf->maclen = eth_hlen;
+       sqbuf->tcphlen = sizeof(*tcph) + opts_len;
+       sqbuf->scratch = (void *)cm_node;
+
+       ethh = (struct ethhdr *)buf;
+       buf += eth_hlen;
+
+       if (cm_node->ipv4) {
+               sqbuf->ipv4 = true;
+
+               iph = (struct iphdr *)buf;
+               buf += sizeof(*iph);
+               tcph = (struct tcphdr *)buf;
+               buf += sizeof(*tcph);
+
+               ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
+               ether_addr_copy(ethh->h_source, cm_node->loc_mac);
+               if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
+
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP);
+               } else {
+                       ethh->h_proto = htons(ETH_P_IP);
+               }
+
+               iph->version = IPVERSION;
+               iph->ihl = 5;   /* 5 * 4Byte words, IP headr len */
+               iph->tos = 0;
+               iph->tot_len = htons(packetsize);
+               iph->id = htons(++cm_node->tcp_cntxt.loc_id);
+
+               iph->frag_off = htons(0x4000);
+               iph->ttl = 0x40;
+               iph->protocol = IPPROTO_TCP;
+
+               iph->saddr = htonl(cm_node->map_loc_addr[0]);
+               iph->daddr = htonl(cm_node->map_rem_addr[0]);
+       } else {
+               sqbuf->ipv4 = false;
+               ip6h = (struct ipv6hdr *)buf;
+               buf += sizeof(*ip6h);
+               tcph = (struct tcphdr *)buf;
+               buf += sizeof(*tcph);
+
+               ether_addr_copy(ethh->h_dest, cm_node->rem_mac);
+               ether_addr_copy(ethh->h_source, cm_node->loc_mac);
+               if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q);
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id);
+                       ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
+               } else {
+                       ethh->h_proto = htons(ETH_P_IPV6);
+               }
+               ip6h->version = 6;
+               ip6h->flow_lbl[0] = 0;
+               ip6h->flow_lbl[1] = 0;
+               ip6h->flow_lbl[2] = 0;
+               ip6h->payload_len = htons(packetsize - sizeof(*ip6h));
+               ip6h->nexthdr = 6;
+               ip6h->hop_limit = 128;
+
+               i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32,
+                                   cm_node->map_loc_addr);
+               i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32,
+                                   cm_node->map_rem_addr);
+       }
+
+       tcph->source = htons(cm_node->map_loc_port);
+       tcph->dest = htons(cm_node->map_rem_port);
+
+       tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
+
+       if (flags & SET_ACK) {
+               cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
+               tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
+               tcph->ack = 1;
+       } else {
+               tcph->ack_seq = 0;
+       }
+
+       if (flags & SET_SYN) {
+               cm_node->tcp_cntxt.loc_seq_num++;
+               tcph->syn = 1;
+       } else {
+               cm_node->tcp_cntxt.loc_seq_num += hdr_len + pd_len;
+       }
+
+       if (flags & SET_FIN) {
+               cm_node->tcp_cntxt.loc_seq_num++;
+               tcph->fin = 1;
+       }
+
+       if (flags & SET_RST)
+               tcph->rst = 1;
+
+       tcph->doff = (u16)((sizeof(*tcph) + opts_len + 3) >> 2);
+       sqbuf->tcphlen = tcph->doff << 2;
+       tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
+       tcph->urg_ptr = 0;
+
+       if (opts_len) {
+               memcpy(buf, options->addr, opts_len);
+               buf += opts_len;
+       }
+
+       if (hdr_len) {
+               memcpy(buf, hdr->addr, hdr_len);
+               buf += hdr_len;
+       }
+
+       if (pd_len)
+               memcpy(buf, pdata->addr, pd_len);
+
+       atomic_set(&sqbuf->refcount, 1);
+
+       return sqbuf;
+}
+
+/**
+ * i40iw_send_reset - Send RST packet
+ * @cm_node: connection's node
+ */
+static int i40iw_send_reset(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_puda_buf *sqbuf;
+       int flags = SET_RST | SET_ACK;
+
+       sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags);
+       if (!sqbuf) {
+               i40iw_pr_err("no sqbuf\n");
+               return -1;
+       }
+
+       return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1);
+}
+
+/**
+ * i40iw_active_open_err - send event for active side cm error
+ * @cm_node: connection's node
+ * @reset: Flag to send reset or not
+ */
+static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset)
+{
+       i40iw_cleanup_retrans_entry(cm_node);
+       cm_node->cm_core->stats_connect_errs++;
+       if (reset) {
+               i40iw_debug(cm_node->dev,
+                           I40IW_DEBUG_CM,
+                           "%s cm_node=%p state=%d\n",
+                           __func__,
+                           cm_node,
+                           cm_node->state);
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+       }
+
+       cm_node->state = I40IW_CM_STATE_CLOSED;
+       i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
+}
+
+/**
+ * i40iw_passive_open_err - handle passive side cm error
+ * @cm_node: connection's node
+ * @reset: send reset or just free cm_node
+ */
+static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset)
+{
+       i40iw_cleanup_retrans_entry(cm_node);
+       cm_node->cm_core->stats_passive_errs++;
+       cm_node->state = I40IW_CM_STATE_CLOSED;
+       i40iw_debug(cm_node->dev,
+                   I40IW_DEBUG_CM,
+                   "%s cm_node=%p state =%d\n",
+                   __func__,
+                   cm_node,
+                   cm_node->state);
+       if (reset)
+               i40iw_send_reset(cm_node);
+       else
+               i40iw_rem_ref_cm_node(cm_node);
+}
+
+/**
+ * i40iw_event_connect_error - to create connect error event
+ * @event: cm information for connect event
+ */
+static void i40iw_event_connect_error(struct i40iw_cm_event *event)
+{
+       struct i40iw_qp *iwqp;
+       struct iw_cm_id *cm_id;
+
+       cm_id = event->cm_node->cm_id;
+       if (!cm_id)
+               return;
+
+       iwqp = cm_id->provider_data;
+
+       if (!iwqp || !iwqp->iwdev)
+               return;
+
+       iwqp->cm_id = NULL;
+       cm_id->provider_data = NULL;
+       i40iw_send_cm_event(event->cm_node, cm_id,
+                           IW_CM_EVENT_CONNECT_REPLY,
+                           -ECONNRESET);
+       cm_id->rem_ref(cm_id);
+       i40iw_rem_ref_cm_node(event->cm_node);
+}
+
+/**
+ * i40iw_process_options
+ * @cm_node: connection's node
+ * @optionsloc: point to start of options
+ * @optionsize: size of all options
+ * @syn_packet: flag if syn packet
+ */
+static int i40iw_process_options(struct i40iw_cm_node *cm_node,
+                                u8 *optionsloc,
+                                u32 optionsize,
+                                u32 syn_packet)
+{
+       u32 tmp;
+       u32 offset = 0;
+       union all_known_options *all_options;
+       char got_mss_option = 0;
+
+       while (offset < optionsize) {
+               all_options = (union all_known_options *)(optionsloc + offset);
+               switch (all_options->as_base.optionnum) {
+               case OPTION_NUMBER_END:
+                       offset = optionsize;
+                       break;
+               case OPTION_NUMBER_NONE:
+                       offset += 1;
+                       continue;
+               case OPTION_NUMBER_MSS:
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "%s: MSS Length: %d Offset: %d Size: %d\n",
+                                   __func__,
+                                   all_options->as_mss.length,
+                                   offset,
+                                   optionsize);
+                       got_mss_option = 1;
+                       if (all_options->as_mss.length != 4)
+                               return -1;
+                       tmp = ntohs(all_options->as_mss.mss);
+                       if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss)
+                               cm_node->tcp_cntxt.mss = tmp;
+                       break;
+               case OPTION_NUMBER_WINDOW_SCALE:
+                       cm_node->tcp_cntxt.snd_wscale =
+                           all_options->as_windowscale.shiftcount;
+                       break;
+               default:
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "TCP Option not understood: %x\n",
+                                   all_options->as_base.optionnum);
+                       break;
+               }
+               offset += all_options->as_base.length;
+       }
+       if (!got_mss_option && syn_packet)
+               cm_node->tcp_cntxt.mss = I40IW_CM_DEFAULT_MSS;
+       return 0;
+}
+
+/**
+ * i40iw_handle_tcp_options -
+ * @cm_node: connection's node
+ * @tcph: pointer tcp header
+ * @optionsize: size of options rcvd
+ * @passive: active or passive flag
+ */
+static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node,
+                                   struct tcphdr *tcph,
+                                   int optionsize,
+                                   int passive)
+{
+       u8 *optionsloc = (u8 *)&tcph[1];
+
+       if (optionsize) {
+               if (i40iw_process_options(cm_node,
+                                         optionsloc,
+                                         optionsize,
+                                         (u32)tcph->syn)) {
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "%s: Node %p, Sending RESET\n",
+                                   __func__,
+                                   cm_node);
+                       if (passive)
+                               i40iw_passive_open_err(cm_node, true);
+                       else
+                               i40iw_active_open_err(cm_node, true);
+                       return -1;
+               }
+       }
+
+       cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
+           cm_node->tcp_cntxt.snd_wscale;
+
+       if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
+               cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
+       return 0;
+}
+
+/**
+ * i40iw_build_mpa_v1 - build a MPA V1 frame
+ * @cm_node: connection's node
+ * @mpa_key: to do read0 or write0
+ */
+static void i40iw_build_mpa_v1(struct i40iw_cm_node *cm_node,
+                              void *start_addr,
+                              u8 mpa_key)
+{
+       struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
+
+       switch (mpa_key) {
+       case MPA_KEY_REQUEST:
+               memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
+               break;
+       case MPA_KEY_REPLY:
+               memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
+               break;
+       default:
+               break;
+       }
+       mpa_frame->flags = IETF_MPA_FLAGS_CRC;
+       mpa_frame->rev = cm_node->mpa_frame_rev;
+       mpa_frame->priv_data_len = htons(cm_node->pdata.size);
+}
+
+/**
+ * i40iw_build_mpa_v2 - build a MPA V2 frame
+ * @cm_node: connection's node
+ * @start_addr: buffer start address
+ * @mpa_key: to do read0 or write0
+ */
+static void i40iw_build_mpa_v2(struct i40iw_cm_node *cm_node,
+                              void *start_addr,
+                              u8 mpa_key)
+{
+       struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
+       struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
+
+       /* initialize the upper 5 bytes of the frame */
+       i40iw_build_mpa_v1(cm_node, start_addr, mpa_key);
+       mpa_frame->flags |= IETF_MPA_V2_FLAG;
+       mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
+
+       /* initialize RTR msg */
+       if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
+               rtr_msg->ctrl_ird = IETF_NO_IRD_ORD;
+               rtr_msg->ctrl_ord = IETF_NO_IRD_ORD;
+       } else {
+               rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
+                       IETF_NO_IRD_ORD : cm_node->ird_size;
+               rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
+                       IETF_NO_IRD_ORD : cm_node->ord_size;
+       }
+
+       rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
+       rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
+
+       switch (mpa_key) {
+       case MPA_KEY_REQUEST:
+               rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
+               rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
+               break;
+       case MPA_KEY_REPLY:
+               switch (cm_node->send_rdma0_op) {
+               case SEND_RDMA_WRITE_ZERO:
+                       rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
+                       break;
+               case SEND_RDMA_READ_ZERO:
+                       rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
+                       break;
+               }
+               break;
+       default:
+               break;
+       }
+       rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
+       rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
+}
+
+/**
+ * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2
+ * @cm_node: connection's node
+ * @mpa: mpa: data buffer
+ * @mpa_key: to do read0 or write0
+ */
+static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node,
+                                   struct i40iw_kmem_info *mpa,
+                                   u8 mpa_key)
+{
+       int hdr_len = 0;
+
+       switch (cm_node->mpa_frame_rev) {
+       case IETF_MPA_V1:
+               hdr_len = sizeof(struct ietf_mpa_v1);
+               i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key);
+               break;
+       case IETF_MPA_V2:
+               hdr_len = sizeof(struct ietf_mpa_v2);
+               i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key);
+               break;
+       default:
+               break;
+       }
+
+       return hdr_len;
+}
+
+/**
+ * i40iw_send_mpa_request - active node send mpa request to passive node
+ * @cm_node: connection's node
+ */
+static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_puda_buf *sqbuf;
+
+       if (!cm_node) {
+               i40iw_pr_err("cm_node == NULL\n");
+               return -1;
+       }
+
+       cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
+       cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
+                                                        &cm_node->mpa_hdr,
+                                                        MPA_KEY_REQUEST);
+       if (!cm_node->mpa_hdr.size) {
+               i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size);
+               return -1;
+       }
+
+       sqbuf = i40iw_form_cm_frame(cm_node,
+                                   NULL,
+                                   &cm_node->mpa_hdr,
+                                   &cm_node->pdata,
+                                   SET_ACK);
+       if (!sqbuf) {
+               i40iw_pr_err("sq_buf == NULL\n");
+               return -1;
+       }
+
+       return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
+}
+
+/**
+ * i40iw_send_mpa_reject -
+ * @cm_node: connection's node
+ * @pdata: reject data for connection
+ * @plen: length of reject data
+ */
+static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node,
+                                const void *pdata,
+                                u8 plen)
+{
+       struct i40iw_puda_buf *sqbuf;
+       struct i40iw_kmem_info priv_info;
+
+       cm_node->mpa_hdr.addr = &cm_node->mpa_frame;
+       cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node,
+                                                        &cm_node->mpa_hdr,
+                                                        MPA_KEY_REPLY);
+
+       cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT;
+       priv_info.addr = (void *)pdata;
+       priv_info.size = plen;
+
+       sqbuf = i40iw_form_cm_frame(cm_node,
+                                   NULL,
+                                   &cm_node->mpa_hdr,
+                                   &priv_info,
+                                   SET_ACK | SET_FIN);
+       if (!sqbuf) {
+               i40iw_pr_err("no sqbuf\n");
+               return -ENOMEM;
+       }
+       cm_node->state = I40IW_CM_STATE_FIN_WAIT1;
+       return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
+}
+
+/**
+ * recv_mpa - process an IETF MPA frame
+ * @cm_node: connection's node
+ * @buffer: Data pointer
+ * @type: to return accept or reject
+ * @len: Len of mpa buffer
+ */
+static int i40iw_parse_mpa(struct i40iw_cm_node *cm_node, u8 *buffer, u32 *type, u32 len)
+{
+       struct ietf_mpa_v1 *mpa_frame;
+       struct ietf_mpa_v2 *mpa_v2_frame;
+       struct ietf_rtr_msg *rtr_msg;
+       int mpa_hdr_len;
+       int priv_data_len;
+
+       *type = I40IW_MPA_REQUEST_ACCEPT;
+
+       if (len < sizeof(struct ietf_mpa_v1)) {
+               i40iw_pr_err("ietf buffer small (%x)\n", len);
+               return -1;
+       }
+
+       mpa_frame = (struct ietf_mpa_v1 *)buffer;
+       mpa_hdr_len = sizeof(struct ietf_mpa_v1);
+       priv_data_len = ntohs(mpa_frame->priv_data_len);
+
+       if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
+               i40iw_pr_err("large pri_data %d\n", priv_data_len);
+               return -1;
+       }
+       if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
+               i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev);
+               return -1;
+       }
+       if (mpa_frame->rev > cm_node->mpa_frame_rev) {
+               i40iw_pr_err("rev %d\n", mpa_frame->rev);
+               return -1;
+       }
+       cm_node->mpa_frame_rev = mpa_frame->rev;
+
+       if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
+               if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
+                       i40iw_pr_err("Unexpected MPA Key received\n");
+                       return -1;
+               }
+       } else {
+               if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
+                       i40iw_pr_err("Unexpected MPA Key received\n");
+                       return -1;
+               }
+       }
+
+       if (priv_data_len + mpa_hdr_len > len) {
+               i40iw_pr_err("ietf buffer len(%x + %x != %x)\n",
+                            priv_data_len, mpa_hdr_len, len);
+               return -1;
+       }
+       if (len > MAX_CM_BUFFER) {
+               i40iw_pr_err("ietf buffer large len = %d\n", len);
+               return -1;
+       }
+
+       switch (mpa_frame->rev) {
+       case IETF_MPA_V2:{
+                       u16 ird_size;
+                       u16 ord_size;
+                       u16 ctrl_ord;
+                       u16 ctrl_ird;
+
+                       mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
+                       mpa_hdr_len += IETF_RTR_MSG_SIZE;
+                       rtr_msg = &mpa_v2_frame->rtr_msg;
+
+                       /* parse rtr message */
+                       ctrl_ord = ntohs(rtr_msg->ctrl_ord);
+                       ctrl_ird = ntohs(rtr_msg->ctrl_ird);
+                       ird_size = ctrl_ird & IETF_NO_IRD_ORD;
+                       ord_size = ctrl_ord & IETF_NO_IRD_ORD;
+
+                       if (!(ctrl_ird & IETF_PEER_TO_PEER))
+                               return -1;
+
+                       if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) {
+                               cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
+                               goto negotiate_done;
+                       }
+
+                       if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) {
+                               /* responder */
+                               if (!ord_size && (ctrl_ord & IETF_RDMA0_READ))
+                                       cm_node->ird_size = 1;
+                               if (cm_node->ord_size > ird_size)
+                                       cm_node->ord_size = ird_size;
+                       } else {
+                               /* initiator */
+                               if (!ird_size && (ctrl_ord & IETF_RDMA0_READ))
+                                       return -1;
+                               if (cm_node->ord_size > ird_size)
+                                       cm_node->ord_size = ird_size;
+
+                               if (cm_node->ird_size < ord_size)
+                                       /* no resources available */
+                                       return -1;
+                       }
+
+negotiate_done:
+                       if (ctrl_ord & IETF_RDMA0_READ)
+                               cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
+                       else if (ctrl_ord & IETF_RDMA0_WRITE)
+                               cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
+                       else    /* Not supported RDMA0 operation */
+                               return -1;
+                       i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
+                                   "MPAV2: Negotiated ORD: %d, IRD: %d\n",
+                                   cm_node->ord_size, cm_node->ird_size);
+                       break;
+               }
+               break;
+       case IETF_MPA_V1:
+       default:
+               break;
+       }
+
+       memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len);
+       cm_node->pdata.size = priv_data_len;
+
+       if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
+               *type = I40IW_MPA_REQUEST_REJECT;
+
+       if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS)
+               cm_node->snd_mark_en = true;
+
+       return 0;
+}
+
+/**
+ * i40iw_schedule_cm_timer
+ * @@cm_node: connection's node
+ * @sqbuf: buffer to send
+ * @type: if it es send ot close
+ * @send_retrans: if rexmits to be done
+ * @close_when_complete: is cm_node to be removed
+ *
+ * note - cm_node needs to be protected before calling this. Encase in:
+ *             i40iw_rem_ref_cm_node(cm_core, cm_node);
+ *             i40iw_schedule_cm_timer(...)
+ *             atomic_inc(&cm_node->ref_count);
+ */
+int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
+                           struct i40iw_puda_buf *sqbuf,
+                           enum i40iw_timer_type type,
+                           int send_retrans,
+                           int close_when_complete)
+{
+       struct i40iw_sc_dev *dev = cm_node->dev;
+       struct i40iw_cm_core *cm_core = cm_node->cm_core;
+       struct i40iw_timer_entry *new_send;
+       int ret = 0;
+       u32 was_timer_set;
+       unsigned long flags;
+
+       new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
+       if (!new_send) {
+               i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
+               return -ENOMEM;
+       }
+       new_send->retrycount = I40IW_DEFAULT_RETRYS;
+       new_send->retranscount = I40IW_DEFAULT_RETRANS;
+       new_send->sqbuf = sqbuf;
+       new_send->timetosend = jiffies;
+       new_send->type = type;
+       new_send->send_retrans = send_retrans;
+       new_send->close_when_complete = close_when_complete;
+
+       if (type == I40IW_TIMER_TYPE_CLOSE) {
+               new_send->timetosend += (HZ / 10);
+               if (cm_node->close_entry) {
+                       kfree(new_send);
+                       i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf);
+                       i40iw_pr_err("already close entry\n");
+                       return -EINVAL;
+               }
+               cm_node->close_entry = new_send;
+       }
+
+       if (type == I40IW_TIMER_TYPE_SEND) {
+               spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
+               cm_node->send_entry = new_send;
+               atomic_inc(&cm_node->ref_count);
+               spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
+               new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT;
+
+               atomic_inc(&sqbuf->refcount);
+               i40iw_puda_send_buf(dev->ilq, sqbuf);
+               if (!send_retrans) {
+                       i40iw_cleanup_retrans_entry(cm_node);
+                       if (close_when_complete)
+                               i40iw_rem_ref_cm_node(cm_node);
+                       return ret;
+               }
+       }
+
+       spin_lock_irqsave(&cm_core->ht_lock, flags);
+       was_timer_set = timer_pending(&cm_core->tcp_timer);
+
+       if (!was_timer_set) {
+               cm_core->tcp_timer.expires = new_send->timetosend;
+               add_timer(&cm_core->tcp_timer);
+       }
+       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+
+       return ret;
+}
+
+/**
+ * i40iw_retrans_expired - Could not rexmit the packet
+ * @cm_node: connection's node
+ */
+static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node)
+{
+       struct iw_cm_id *cm_id = cm_node->cm_id;
+       enum i40iw_cm_node_state state = cm_node->state;
+
+       cm_node->state = I40IW_CM_STATE_CLOSED;
+       switch (state) {
+       case I40IW_CM_STATE_SYN_RCVD:
+       case I40IW_CM_STATE_CLOSING:
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       case I40IW_CM_STATE_FIN_WAIT1:
+       case I40IW_CM_STATE_LAST_ACK:
+               if (cm_node->cm_id)
+                       cm_id->rem_ref(cm_id);
+               i40iw_send_reset(cm_node);
+               break;
+       default:
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+               i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
+               break;
+       }
+}
+
+/**
+ * i40iw_handle_close_entry - for handling retry/timeouts
+ * @cm_node: connection's node
+ * @rem_node: flag for remove cm_node
+ */
+static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node)
+{
+       struct i40iw_timer_entry *close_entry = cm_node->close_entry;
+       struct iw_cm_id *cm_id = cm_node->cm_id;
+       struct i40iw_qp *iwqp;
+       unsigned long flags;
+
+       if (!close_entry)
+               return;
+       iwqp = (struct i40iw_qp *)close_entry->sqbuf;
+       if (iwqp) {
+               spin_lock_irqsave(&iwqp->lock, flags);
+               if (iwqp->cm_id) {
+                       iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED;
+                       iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR;
+                       iwqp->last_aeq = I40IW_AE_RESET_SENT;
+                       iwqp->ibqp_state = IB_QPS_ERR;
+                       spin_unlock_irqrestore(&iwqp->lock, flags);
+                       i40iw_cm_disconn(iwqp);
+               } else {
+                       spin_unlock_irqrestore(&iwqp->lock, flags);
+               }
+       } else if (rem_node) {
+               /* TIME_WAIT state */
+               i40iw_rem_ref_cm_node(cm_node);
+       }
+       if (cm_id)
+               cm_id->rem_ref(cm_id);
+       kfree(close_entry);
+       cm_node->close_entry = NULL;
+}
+
+/**
+ * i40iw_cm_timer_tick - system's timer expired callback
+ * @pass: Pointing to cm_core
+ */
+static void i40iw_cm_timer_tick(unsigned long pass)
+{
+       unsigned long nexttimeout = jiffies + I40IW_LONG_TIME;
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_timer_entry *send_entry, *close_entry;
+       struct list_head *list_core_temp;
+       struct list_head *list_node;
+       struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass;
+       u32 settimer = 0;
+       unsigned long timetosend;
+       struct i40iw_sc_dev *dev;
+       unsigned long flags;
+
+       struct list_head timer_list;
+
+       INIT_LIST_HEAD(&timer_list);
+       spin_lock_irqsave(&cm_core->ht_lock, flags);
+
+       list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) {
+               cm_node = container_of(list_node, struct i40iw_cm_node, list);
+               if (cm_node->close_entry || cm_node->send_entry) {
+                       atomic_inc(&cm_node->ref_count);
+                       list_add(&cm_node->timer_entry, &timer_list);
+               }
+       }
+       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+
+       list_for_each_safe(list_node, list_core_temp, &timer_list) {
+               cm_node = container_of(list_node,
+                                      struct i40iw_cm_node,
+                                      timer_entry);
+               close_entry = cm_node->close_entry;
+
+               if (close_entry) {
+                       if (time_after(close_entry->timetosend, jiffies)) {
+                               if (nexttimeout > close_entry->timetosend ||
+                                   !settimer) {
+                                       nexttimeout = close_entry->timetosend;
+                                       settimer = 1;
+                               }
+                       } else {
+                               i40iw_handle_close_entry(cm_node, 1);
+                       }
+               }
+
+               spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
+
+               send_entry = cm_node->send_entry;
+               if (!send_entry)
+                       goto done;
+               if (time_after(send_entry->timetosend, jiffies)) {
+                       if (cm_node->state != I40IW_CM_STATE_OFFLOADED) {
+                               if ((nexttimeout > send_entry->timetosend) ||
+                                   !settimer) {
+                                       nexttimeout = send_entry->timetosend;
+                                       settimer = 1;
+                               }
+                       } else {
+                               i40iw_free_retrans_entry(cm_node);
+                       }
+                       goto done;
+               }
+
+               if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) ||
+                   (cm_node->state == I40IW_CM_STATE_CLOSED)) {
+                       i40iw_free_retrans_entry(cm_node);
+                       goto done;
+               }
+
+               if (!send_entry->retranscount || !send_entry->retrycount) {
+                       i40iw_free_retrans_entry(cm_node);
+
+                       spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
+                       i40iw_retrans_expired(cm_node);
+                       cm_node->state = I40IW_CM_STATE_CLOSED;
+                       spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
+                       goto done;
+               }
+               cm_node->cm_core->stats_pkt_retrans++;
+               spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
+
+               dev = cm_node->dev;
+               atomic_inc(&send_entry->sqbuf->refcount);
+               i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf);
+               spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
+               if (send_entry->send_retrans) {
+                       send_entry->retranscount--;
+                       timetosend = (I40IW_RETRY_TIMEOUT <<
+                                     (I40IW_DEFAULT_RETRANS -
+                                      send_entry->retranscount));
+
+                       send_entry->timetosend = jiffies +
+                           min(timetosend, I40IW_MAX_TIMEOUT);
+                       if (nexttimeout > send_entry->timetosend || !settimer) {
+                               nexttimeout = send_entry->timetosend;
+                               settimer = 1;
+                       }
+               } else {
+                       int close_when_complete;
+
+                       close_when_complete = send_entry->close_when_complete;
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "cm_node=%p state=%d\n",
+                                   cm_node,
+                                   cm_node->state);
+                       i40iw_free_retrans_entry(cm_node);
+                       if (close_when_complete)
+                               i40iw_rem_ref_cm_node(cm_node);
+               }
+done:
+               spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
+               i40iw_rem_ref_cm_node(cm_node);
+       }
+
+       if (settimer) {
+               spin_lock_irqsave(&cm_core->ht_lock, flags);
+               if (!timer_pending(&cm_core->tcp_timer)) {
+                       cm_core->tcp_timer.expires = nexttimeout;
+                       add_timer(&cm_core->tcp_timer);
+               }
+               spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+       }
+}
+
+/**
+ * i40iw_send_syn - send SYN packet
+ * @cm_node: connection's node
+ * @sendack: flag to set ACK bit or not
+ */
+int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack)
+{
+       struct i40iw_puda_buf *sqbuf;
+       int flags = SET_SYN;
+       char optionsbuffer[sizeof(struct option_mss) +
+                          sizeof(struct option_windowscale) +
+                          sizeof(struct option_base) + TCP_OPTIONS_PADDING];
+       struct i40iw_kmem_info opts;
+
+       int optionssize = 0;
+       /* Sending MSS option */
+       union all_known_options *options;
+
+       opts.addr = optionsbuffer;
+       if (!cm_node) {
+               i40iw_pr_err("no cm_node\n");
+               return -EINVAL;
+       }
+
+       options = (union all_known_options *)&optionsbuffer[optionssize];
+       options->as_mss.optionnum = OPTION_NUMBER_MSS;
+       options->as_mss.length = sizeof(struct option_mss);
+       options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
+       optionssize += sizeof(struct option_mss);
+
+       options = (union all_known_options *)&optionsbuffer[optionssize];
+       options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
+       options->as_windowscale.length = sizeof(struct option_windowscale);
+       options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
+       optionssize += sizeof(struct option_windowscale);
+       options = (union all_known_options *)&optionsbuffer[optionssize];
+       options->as_end = OPTION_NUMBER_END;
+       optionssize += 1;
+
+       if (sendack)
+               flags |= SET_ACK;
+
+       opts.size = optionssize;
+
+       sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags);
+       if (!sqbuf) {
+               i40iw_pr_err("no sqbuf\n");
+               return -1;
+       }
+       return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
+}
+
+/**
+ * i40iw_send_ack - Send ACK packet
+ * @cm_node: connection's node
+ */
+static void i40iw_send_ack(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_puda_buf *sqbuf;
+
+       sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK);
+       if (sqbuf)
+               i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf);
+       else
+               i40iw_pr_err("no sqbuf\n");
+}
+
+/**
+ * i40iw_send_fin - Send FIN pkt
+ * @cm_node: connection's node
+ */
+static int i40iw_send_fin(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_puda_buf *sqbuf;
+
+       sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN);
+       if (!sqbuf) {
+               i40iw_pr_err("no sqbuf\n");
+               return -1;
+       }
+       return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0);
+}
+
+/**
+ * i40iw_find_node - find a cm node that matches the reference cm node
+ * @cm_core: cm's core
+ * @rem_port: remote tcp port num
+ * @rem_addr: remote ip addr
+ * @loc_port: local tcp port num
+ * @loc_addr: loc ip addr
+ * @add_refcnt: flag to increment refcount of cm_node
+ */
+struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core,
+                                     u16 rem_port,
+                                     u32 *rem_addr,
+                                     u16 loc_port,
+                                     u32 *loc_addr,
+                                     bool add_refcnt)
+{
+       struct list_head *hte;
+       struct i40iw_cm_node *cm_node;
+       unsigned long flags;
+
+       hte = &cm_core->connected_nodes;
+
+       /* walk list and find cm_node associated with this session ID */
+       spin_lock_irqsave(&cm_core->ht_lock, flags);
+       list_for_each_entry(cm_node, hte, list) {
+               if (!memcmp(cm_node->map_loc_addr, loc_addr, sizeof(cm_node->map_loc_addr)) &&
+                   (cm_node->map_loc_port == loc_port) &&
+                   !memcmp(cm_node->map_rem_addr, rem_addr, sizeof(cm_node->map_rem_addr)) &&
+                   (cm_node->map_rem_port == rem_port)) {
+                       if (add_refcnt)
+                               atomic_inc(&cm_node->ref_count);
+                       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+                       return cm_node;
+               }
+       }
+       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+
+       /* no owner node */
+       return NULL;
+}
+
+/**
+ * i40iw_find_listener - find a cm node listening on this addr-port pair
+ * @cm_core: cm's core
+ * @dst_port: listener tcp port num
+ * @dst_addr: listener ip addr
+ * @listener_state: state to match with listen node's
+ */
+static struct i40iw_cm_listener *i40iw_find_listener(
+                                                    struct i40iw_cm_core *cm_core,
+                                                    u32 *dst_addr,
+                                                    u16 dst_port,
+                                                    u16 vlan_id,
+                                                    enum i40iw_cm_listener_state
+                                                    listener_state,
+                                                    bool mapped)
+{
+       struct i40iw_cm_listener *listen_node;
+       static const u32 ip_zero[4] = { 0, 0, 0, 0 };
+       u32 listen_addr[4];
+       u16 listen_port;
+       unsigned long flags;
+
+       /* walk list and find cm_node associated with this session ID */
+       spin_lock_irqsave(&cm_core->listen_list_lock, flags);
+       list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
+               if (mapped) {
+                       memcpy(listen_addr, listen_node->map_loc_addr, sizeof(listen_addr));
+                       listen_port = listen_node->map_loc_port;
+               } else {
+                       memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr));
+                       listen_port = listen_node->loc_port;
+               }
+               /* compare node pair, return node handle if a match */
+               if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) ||
+                    !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) &&
+                    (listen_port == dst_port) &&
+                    (listener_state & listen_node->listener_state)) {
+                       atomic_inc(&listen_node->ref_count);
+                       spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
+                       return listen_node;
+               }
+       }
+       spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
+       return NULL;
+}
+
+/**
+ * i40iw_add_hte_node - add a cm node to the hash table
+ * @cm_core: cm's core
+ * @cm_node: connection's node
+ */
+static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core,
+                              struct i40iw_cm_node *cm_node)
+{
+       struct list_head *hte;
+       unsigned long flags;
+
+       if (!cm_node || !cm_core) {
+               i40iw_pr_err("cm_node or cm_core == NULL\n");
+               return;
+       }
+       spin_lock_irqsave(&cm_core->ht_lock, flags);
+
+       /* get a handle on the hash table element (list head for this slot) */
+       hte = &cm_core->connected_nodes;
+       list_add_tail(&cm_node->list, hte);
+       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+}
+
+/**
+ * listen_port_in_use - determine if port is in use
+ * @port: Listen port number
+ */
+static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port)
+{
+       struct i40iw_cm_listener *listen_node;
+       unsigned long flags;
+       bool ret = false;
+
+       spin_lock_irqsave(&cm_core->listen_list_lock, flags);
+       list_for_each_entry(listen_node, &cm_core->listen_nodes, list) {
+               if (listen_node->map_loc_port == port) {
+                       ret = true;
+                       break;
+               }
+       }
+       spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
+       return ret;
+}
+
+/**
+ * i40iw_del_multiple_qhash - Remove qhash and child listens
+ * @iwdev: iWarp device
+ * @cm_info: CM info for parent listen node
+ * @cm_parent_listen_node: The parent listen node
+ */
+static enum i40iw_status_code i40iw_del_multiple_qhash(
+                                                      struct i40iw_device *iwdev,
+                                                      struct i40iw_cm_info *cm_info,
+                                                      struct i40iw_cm_listener *cm_parent_listen_node)
+{
+       struct i40iw_cm_listener *child_listen_node;
+       enum i40iw_status_code ret = I40IW_ERR_CONFIG;
+       struct list_head *pos, *tpos;
+       unsigned long flags;
+
+       spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
+       list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) {
+               child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list);
+               if (child_listen_node->ipv4)
+                       i40iw_debug(&iwdev->sc_dev,
+                                   I40IW_DEBUG_CM,
+                                   "removing child listen for IP=%pI4, port=%d, vlan=%d\n",
+                                   child_listen_node->loc_addr,
+                                   child_listen_node->loc_port,
+                                   child_listen_node->vlan_id);
+               else
+                       i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
+                                   "removing child listen for IP=%pI6, port=%d, vlan=%d\n",
+                                   child_listen_node->loc_addr,
+                                   child_listen_node->loc_port,
+                                   child_listen_node->vlan_id);
+               list_del(pos);
+               memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
+                      sizeof(cm_info->map_loc_addr));
+               memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
+                      sizeof(cm_info->loc_addr));
+               cm_info->vlan_id = child_listen_node->vlan_id;
+               ret = i40iw_manage_qhash(iwdev, cm_info,
+                                        I40IW_QHASH_TYPE_TCP_SYN,
+                                        I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false);
+               kfree(child_listen_node);
+               cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++;
+               i40iw_debug(&iwdev->sc_dev,
+                           I40IW_DEBUG_CM,
+                           "freed pointer = %p\n",
+                           child_listen_node);
+       }
+       spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
+
+       return ret;
+}
+
+/**
+ * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac
+ * @addr: local IPv6 address
+ * @vlan_id: vlan id for the given IPv6 address
+ * @mac: mac address for the given IPv6 address
+ *
+ * Returns the net_device of the IPv6 address and also sets the
+ * vlan id and mac for that address.
+ */
+static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac)
+{
+       struct net_device *ip_dev = NULL;
+#if IS_ENABLED(CONFIG_IPV6)
+       struct in6_addr laddr6;
+
+       i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr);
+       if (vlan_id)
+               *vlan_id = I40IW_NO_VLAN;
+       if (mac)
+               eth_zero_addr(mac);
+       rcu_read_lock();
+       for_each_netdev_rcu(&init_net, ip_dev) {
+               if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) {
+                       if (vlan_id)
+                               *vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
+                       if (ip_dev->dev_addr && mac)
+                               ether_addr_copy(mac, ip_dev->dev_addr);
+                       break;
+               }
+       }
+       rcu_read_unlock();
+#endif
+       return ip_dev;
+}
+
+/**
+ * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address
+ * @addr: local IPv4 address
+ */
+static u16 i40iw_get_vlan_ipv4(u32 *addr)
+{
+       struct net_device *netdev;
+       u16 vlan_id = I40IW_NO_VLAN;
+
+       netdev = ip_dev_find(&init_net, htonl(addr[0]));
+       if (netdev) {
+               vlan_id = rdma_vlan_dev_vlan_id(netdev);
+               dev_put(netdev);
+       }
+       return vlan_id;
+}
+
+/**
+ * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6
+ * @iwdev: iWarp device
+ * @cm_info: CM info for parent listen node
+ * @cm_parent_listen_node: The parent listen node
+ *
+ * Adds a qhash and a child listen node for every IPv6 address
+ * on the adapter and adds the associated qhash filter
+ */
+static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
+                                             struct i40iw_cm_info *cm_info,
+                                             struct i40iw_cm_listener *cm_parent_listen_node)
+{
+       struct net_device *ip_dev;
+       struct inet6_dev *idev;
+       struct inet6_ifaddr *ifp;
+       enum i40iw_status_code ret = 0;
+       struct i40iw_cm_listener *child_listen_node;
+       unsigned long flags;
+
+       rtnl_lock();
+       for_each_netdev_rcu(&init_net, ip_dev) {
+               if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
+                     (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
+                    (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
+                       idev = __in6_dev_get(ip_dev);
+                       if (!idev) {
+                               i40iw_pr_err("idev == NULL\n");
+                               break;
+                       }
+                       list_for_each_entry(ifp, &idev->addr_list, if_list) {
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "IP=%pI6, vlan_id=%d, MAC=%pM\n",
+                                           &ifp->addr,
+                                           rdma_vlan_dev_vlan_id(ip_dev),
+                                           ip_dev->dev_addr);
+                               child_listen_node =
+                                       kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "Allocating child listener %p\n",
+                                           child_listen_node);
+                               if (!child_listen_node) {
+                                       i40iw_pr_err("listener memory allocation\n");
+                                       ret = I40IW_ERR_NO_MEMORY;
+                                       goto exit;
+                               }
+                               cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev);
+                               cm_parent_listen_node->vlan_id = cm_info->vlan_id;
+
+                               memcpy(child_listen_node, cm_parent_listen_node,
+                                      sizeof(*child_listen_node));
+
+                               i40iw_copy_ip_ntohl(child_listen_node->loc_addr,
+                                                   ifp->addr.in6_u.u6_addr32);
+                               i40iw_copy_ip_ntohl(child_listen_node->map_loc_addr,
+                                                   ifp->addr.in6_u.u6_addr32);
+
+                               memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
+                                      sizeof(cm_info->map_loc_addr));
+                               memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
+                                      sizeof(cm_info->loc_addr));
+
+                               ret = i40iw_manage_qhash(iwdev, cm_info,
+                                                        I40IW_QHASH_TYPE_TCP_SYN,
+                                                        I40IW_QHASH_MANAGE_TYPE_ADD,
+                                                        NULL, true);
+                               if (!ret) {
+                                       spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
+                                       list_add(&child_listen_node->child_listen_list,
+                                                &cm_parent_listen_node->child_listen_list);
+                                       spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
+                                       cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
+                               } else {
+                                       kfree(child_listen_node);
+                               }
+                       }
+               }
+       }
+exit:
+       rtnl_unlock();
+       return ret;
+}
+
+/**
+ * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4
+ * @iwdev: iWarp device
+ * @cm_info: CM info for parent listen node
+ * @cm_parent_listen_node: The parent listen node
+ *
+ * Adds a qhash and a child listen node for every IPv4 address
+ * on the adapter and adds the associated qhash filter
+ */
+static enum i40iw_status_code i40iw_add_mqh_4(
+                               struct i40iw_device *iwdev,
+                               struct i40iw_cm_info *cm_info,
+                               struct i40iw_cm_listener *cm_parent_listen_node)
+{
+       struct net_device *dev;
+       struct in_device *idev;
+       struct i40iw_cm_listener *child_listen_node;
+       enum i40iw_status_code ret = 0;
+       unsigned long flags;
+
+       rtnl_lock();
+       for_each_netdev(&init_net, dev) {
+               if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
+                     (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
+                   (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
+                       idev = in_dev_get(dev);
+                       for_ifa(idev) {
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
+                                           &ifa->ifa_address,
+                                           rdma_vlan_dev_vlan_id(dev),
+                                           dev->dev_addr);
+                               child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC);
+                               cm_parent_listen_node->cm_core->stats_listen_nodes_created++;
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "Allocating child listener %p\n",
+                                           child_listen_node);
+                               if (!child_listen_node) {
+                                       i40iw_pr_err("listener memory allocation\n");
+                                       in_dev_put(idev);
+                                       ret = I40IW_ERR_NO_MEMORY;
+                                       goto exit;
+                               }
+                               cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev);
+                               cm_parent_listen_node->vlan_id = cm_info->vlan_id;
+                               memcpy(child_listen_node,
+                                      cm_parent_listen_node,
+                                      sizeof(*child_listen_node));
+
+                               child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address);
+                               child_listen_node->map_loc_addr[0] = ntohl(ifa->ifa_address);
+
+                               memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr,
+                                      sizeof(cm_info->map_loc_addr));
+                               memcpy(cm_info->loc_addr, child_listen_node->loc_addr,
+                                      sizeof(cm_info->loc_addr));
+
+                               ret = i40iw_manage_qhash(iwdev,
+                                                        cm_info,
+                                                        I40IW_QHASH_TYPE_TCP_SYN,
+                                                        I40IW_QHASH_MANAGE_TYPE_ADD,
+                                                        NULL,
+                                                        true);
+                               if (!ret) {
+                                       spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags);
+                                       list_add(&child_listen_node->child_listen_list,
+                                                &cm_parent_listen_node->child_listen_list);
+                                       spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags);
+                               } else {
+                                       kfree(child_listen_node);
+                                       cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
+                               }
+                       }
+                       endfor_ifa(idev);
+                       in_dev_put(idev);
+               }
+       }
+exit:
+       rtnl_unlock();
+       return ret;
+}
+
+/**
+ * i40iw_dec_refcnt_listen - delete listener and associated cm nodes
+ * @cm_core: cm's core
+ * @free_hanging_nodes: to free associated cm_nodes
+ * @apbvt_del: flag to delete the apbvt
+ */
+static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core,
+                                  struct i40iw_cm_listener *listener,
+                                  int free_hanging_nodes, bool apbvt_del)
+{
+       int ret = -EINVAL;
+       int err = 0;
+       struct list_head *list_pos;
+       struct list_head *list_temp;
+       struct i40iw_cm_node *cm_node;
+       struct list_head reset_list;
+       struct i40iw_cm_info nfo;
+       struct i40iw_cm_node *loopback;
+       enum i40iw_cm_node_state old_state;
+       unsigned long flags;
+
+       /* free non-accelerated child nodes for this listener */
+       INIT_LIST_HEAD(&reset_list);
+       if (free_hanging_nodes) {
+               spin_lock_irqsave(&cm_core->ht_lock, flags);
+               list_for_each_safe(list_pos, list_temp, &cm_core->connected_nodes) {
+                       cm_node = container_of(list_pos, struct i40iw_cm_node, list);
+                       if ((cm_node->listener == listener) && !cm_node->accelerated) {
+                               atomic_inc(&cm_node->ref_count);
+                               list_add(&cm_node->reset_entry, &reset_list);
+                       }
+               }
+               spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+       }
+
+       list_for_each_safe(list_pos, list_temp, &reset_list) {
+               cm_node = container_of(list_pos, struct i40iw_cm_node, reset_entry);
+               loopback = cm_node->loopbackpartner;
+               if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) {
+                       i40iw_rem_ref_cm_node(cm_node);
+               } else {
+                       if (!loopback) {
+                               i40iw_cleanup_retrans_entry(cm_node);
+                               err = i40iw_send_reset(cm_node);
+                               if (err) {
+                                       cm_node->state = I40IW_CM_STATE_CLOSED;
+                                       i40iw_pr_err("send reset\n");
+                               } else {
+                                       old_state = cm_node->state;
+                                       cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
+                                       if (old_state != I40IW_CM_STATE_MPAREQ_RCVD)
+                                               i40iw_rem_ref_cm_node(cm_node);
+                               }
+                       } else {
+                               struct i40iw_cm_event event;
+
+                               event.cm_node = loopback;
+                               memcpy(event.cm_info.rem_addr,
+                                      loopback->rem_addr, sizeof(event.cm_info.rem_addr));
+                               memcpy(event.cm_info.loc_addr,
+                                      loopback->loc_addr, sizeof(event.cm_info.loc_addr));
+                               event.cm_info.rem_port = loopback->rem_port;
+                               event.cm_info.loc_port = loopback->loc_port;
+                               event.cm_info.cm_id = loopback->cm_id;
+                               event.cm_info.ipv4 = loopback->ipv4;
+                               atomic_inc(&loopback->ref_count);
+                               loopback->state = I40IW_CM_STATE_CLOSED;
+                               i40iw_event_connect_error(&event);
+                               cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED;
+                               i40iw_rem_ref_cm_node(cm_node);
+                       }
+               }
+       }
+
+       if (!atomic_dec_return(&listener->ref_count)) {
+               spin_lock_irqsave(&cm_core->listen_list_lock, flags);
+               list_del(&listener->list);
+               spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
+
+               if (listener->iwdev) {
+                       if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->map_loc_port))
+                               i40iw_manage_apbvt(listener->iwdev,
+                                                  listener->map_loc_port,
+                                                  I40IW_MANAGE_APBVT_DEL);
+
+                       memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr));
+                       memcpy(nfo.map_loc_addr, listener->map_loc_addr, sizeof(nfo.map_loc_addr));
+                       nfo.loc_port = listener->loc_port;
+                       nfo.map_loc_port = listener->map_loc_port;
+                       nfo.ipv4 = listener->ipv4;
+                       nfo.vlan_id = listener->vlan_id;
+
+                       i40iw_remove_mapinfo(&nfo);
+
+                       if (!list_empty(&listener->child_listen_list)) {
+                               i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener);
+                       } else {
+                               if (listener->qhash_set)
+                                       i40iw_manage_qhash(listener->iwdev,
+                                                          &nfo,
+                                                          I40IW_QHASH_TYPE_TCP_SYN,
+                                                          I40IW_QHASH_MANAGE_TYPE_DELETE,
+                                                          NULL,
+                                                          false);
+                       }
+               }
+
+               cm_core->stats_listen_destroyed++;
+               kfree(listener);
+               cm_core->stats_listen_nodes_destroyed++;
+               listener = NULL;
+               ret = 0;
+       }
+
+       if (listener) {
+               if (atomic_read(&listener->pend_accepts_cnt) > 0)
+                       i40iw_debug(cm_core->dev,
+                                   I40IW_DEBUG_CM,
+                                   "%s: listener (%p) pending accepts=%u\n",
+                                   __func__,
+                                   listener,
+                                   atomic_read(&listener->pend_accepts_cnt));
+       }
+
+       return ret;
+}
+
+/**
+ * i40iw_cm_del_listen - delete a linstener
+ * @cm_core: cm's core
+  * @listener: passive connection's listener
+ * @apbvt_del: flag to delete apbvt
+ */
+static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core,
+                              struct i40iw_cm_listener *listener,
+                              bool apbvt_del)
+{
+       listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE;
+       listener->cm_id = NULL; /* going to be destroyed pretty soon */
+       return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del);
+}
+
+/**
+ * i40iw_addr_resolve_neigh - resolve neighbor address
+ * @iwdev: iwarp device structure
+ * @src_ip: local ip address
+ * @dst_ip: remote ip address
+ * @arpindex: if there is an arp entry
+ */
+static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev,
+                                   u32 src_ip,
+                                   u32 dst_ip,
+                                   int arpindex)
+{
+       struct rtable *rt;
+       struct neighbour *neigh;
+       int rc = arpindex;
+       struct net_device *netdev = iwdev->netdev;
+       __be32 dst_ipaddr = htonl(dst_ip);
+       __be32 src_ipaddr = htonl(src_ip);
+
+       rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0);
+       if (IS_ERR(rt)) {
+               i40iw_pr_err("ip_route_output\n");
+               return rc;
+       }
+
+       if (netif_is_bond_slave(netdev))
+               netdev = netdev_master_upper_dev_get(netdev);
+
+       neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr);
+
+       rcu_read_lock();
+       if (neigh) {
+               if (neigh->nud_state & NUD_VALID) {
+                       if (arpindex >= 0) {
+                               if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr,
+                                                    neigh->ha))
+                                       /* Mac address same as arp table */
+                                       goto resolve_neigh_exit;
+                               i40iw_manage_arp_cache(iwdev,
+                                                      iwdev->arp_table[arpindex].mac_addr,
+                                                      &dst_ip,
+                                                      true,
+                                                      I40IW_ARP_DELETE);
+                       }
+
+                       i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD);
+                       rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE);
+               } else {
+                       neigh_event_send(neigh, NULL);
+               }
+       }
+ resolve_neigh_exit:
+
+       rcu_read_unlock();
+       if (neigh)
+               neigh_release(neigh);
+
+       ip_rt_put(rt);
+       return rc;
+}
+
+/**
+ * i40iw_get_dst_ipv6
+ */
+#if IS_ENABLED(CONFIG_IPV6)
+static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr,
+                                           struct sockaddr_in6 *dst_addr)
+{
+       struct dst_entry *dst;
+       struct flowi6 fl6;
+
+       memset(&fl6, 0, sizeof(fl6));
+       fl6.daddr = dst_addr->sin6_addr;
+       fl6.saddr = src_addr->sin6_addr;
+       if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
+               fl6.flowi6_oif = dst_addr->sin6_scope_id;
+
+       dst = ip6_route_output(&init_net, NULL, &fl6);
+       return dst;
+}
+#endif
+
+/**
+ * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address
+ * @iwdev: iwarp device structure
+ * @dst_ip: remote ip address
+ * @arpindex: if there is an arp entry
+ */
+#if IS_ENABLED(CONFIG_IPV6)
+static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev,
+                                        u32 *src,
+                                        u32 *dest,
+                                        int arpindex)
+{
+       struct neighbour *neigh;
+       int rc = arpindex;
+       struct net_device *netdev = iwdev->netdev;
+       struct dst_entry *dst;
+       struct sockaddr_in6 dst_addr;
+       struct sockaddr_in6 src_addr;
+
+       memset(&dst_addr, 0, sizeof(dst_addr));
+       dst_addr.sin6_family = AF_INET6;
+       i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest);
+       memset(&src_addr, 0, sizeof(src_addr));
+       src_addr.sin6_family = AF_INET6;
+       i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src);
+       dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr);
+       if (!dst || dst->error) {
+               if (dst) {
+                       dst_release(dst);
+                       i40iw_pr_err("ip6_route_output returned dst->error = %d\n",
+                                    dst->error);
+               }
+               return rc;
+       }
+
+       if (netif_is_bond_slave(netdev))
+               netdev = netdev_master_upper_dev_get(netdev);
+
+       neigh = dst_neigh_lookup(dst, &dst_addr);
+
+       rcu_read_lock();
+       if (neigh) {
+               i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha);
+               if (neigh->nud_state & NUD_VALID) {
+                       if (arpindex >= 0) {
+                               if (ether_addr_equal
+                                   (iwdev->arp_table[arpindex].mac_addr,
+                                    neigh->ha)) {
+                                       /* Mac address same as in arp table */
+                                       goto resolve_neigh_exit6;
+                               }
+                               i40iw_manage_arp_cache(iwdev,
+                                                      iwdev->arp_table[arpindex].mac_addr,
+                                                      dest,
+                                                      false,
+                                                      I40IW_ARP_DELETE);
+                       }
+                       i40iw_manage_arp_cache(iwdev,
+                                              neigh->ha,
+                                              dest,
+                                              false,
+                                              I40IW_ARP_ADD);
+                       rc = i40iw_arp_table(iwdev,
+                                            dest,
+                                            false,
+                                            NULL,
+                                            I40IW_ARP_RESOLVE);
+               } else {
+                       neigh_event_send(neigh, NULL);
+               }
+       }
+
+ resolve_neigh_exit6:
+       rcu_read_unlock();
+       if (neigh)
+               neigh_release(neigh);
+       dst_release(dst);
+       return rc;
+}
+#endif
+
+/**
+ * i40iw_ipv4_is_loopback - check if loopback
+ * @loc_addr: local addr to compare
+ * @rem_addr: remote address
+ */
+static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr)
+{
+       return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr);
+}
+
+/**
+ * i40iw_ipv6_is_loopback - check if loopback
+ * @loc_addr: local addr to compare
+ * @rem_addr: remote address
+ */
+static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr)
+{
+       struct in6_addr raddr6;
+
+       i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr);
+       return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6));
+}
+
+/**
+ * i40iw_make_cm_node - create a new instance of a cm node
+ * @cm_core: cm's core
+ * @iwdev: iwarp device structure
+ * @cm_info: quad info for connection
+ * @listener: passive connection's listener
+ */
+static struct i40iw_cm_node *i40iw_make_cm_node(
+                                  struct i40iw_cm_core *cm_core,
+                                  struct i40iw_device *iwdev,
+                                  struct i40iw_cm_info *cm_info,
+                                  struct i40iw_cm_listener *listener)
+{
+       struct i40iw_cm_node *cm_node;
+       struct timespec ts;
+       int oldarpindex;
+       int arpindex;
+       struct net_device *netdev = iwdev->netdev;
+
+       /* create an hte and cm_node for this instance */
+       cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
+       if (!cm_node)
+               return NULL;
+
+       /* set our node specific transport info */
+       cm_node->ipv4 = cm_info->ipv4;
+       cm_node->vlan_id = cm_info->vlan_id;
+       memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr));
+       memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr));
+       memcpy(cm_node->map_loc_addr, cm_info->map_loc_addr,
+              sizeof(cm_node->map_loc_addr));
+       memcpy(cm_node->map_rem_addr, cm_info->map_rem_addr,
+              sizeof(cm_node->map_rem_addr));
+       cm_node->loc_port = cm_info->loc_port;
+       cm_node->rem_port = cm_info->rem_port;
+       cm_node->map_loc_port = cm_info->map_loc_port;
+       cm_node->map_rem_port = cm_info->map_rem_port;
+
+       cm_node->mpa_frame_rev = iwdev->mpa_version;
+       cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
+       cm_node->ird_size = I40IW_MAX_IRD_SIZE;
+       cm_node->ord_size = I40IW_MAX_ORD_SIZE;
+
+       cm_node->listener = listener;
+       cm_node->cm_id = cm_info->cm_id;
+       ether_addr_copy(cm_node->loc_mac, netdev->dev_addr);
+       spin_lock_init(&cm_node->retrans_list_lock);
+
+       atomic_set(&cm_node->ref_count, 1);
+       /* associate our parent CM core */
+       cm_node->cm_core = cm_core;
+       cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID;
+       cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
+       cm_node->tcp_cntxt.rcv_wnd =
+                       I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE;
+       ts = current_kernel_time();
+       cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
+       cm_node->tcp_cntxt.mss = iwdev->mss;
+
+       cm_node->iwdev = iwdev;
+       cm_node->dev = &iwdev->sc_dev;
+
+       if ((cm_node->ipv4 &&
+            i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
+            (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr,
+                                                      cm_node->rem_addr))) {
+               arpindex = i40iw_arp_table(iwdev,
+                                          cm_node->map_rem_addr,
+                                          false,
+                                          NULL,
+                                          I40IW_ARP_RESOLVE);
+       } else {
+               oldarpindex = i40iw_arp_table(iwdev,
+                                             cm_node->map_rem_addr,
+                                             false,
+                                             NULL,
+                                             I40IW_ARP_RESOLVE);
+               if (cm_node->ipv4)
+                       arpindex = i40iw_addr_resolve_neigh(iwdev,
+                                                           cm_info->map_loc_addr[0],
+                                                           cm_info->map_rem_addr[0],
+                                                           oldarpindex);
+#if IS_ENABLED(CONFIG_IPV6)
+               else
+                       arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev,
+                                                                cm_info->map_loc_addr,
+                                                                cm_info->map_rem_addr,
+                                                                oldarpindex);
+#endif
+       }
+       if (arpindex < 0) {
+               i40iw_pr_err("cm_node arpindex\n");
+               kfree(cm_node);
+               return NULL;
+       }
+       ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
+       i40iw_add_hte_node(cm_core, cm_node);
+       cm_core->stats_nodes_created++;
+       return cm_node;
+}
+
+/**
+ * i40iw_rem_ref_cm_node - destroy an instance of a cm node
+ * @cm_node: connection's node
+ */
+static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_cm_core *cm_core = cm_node->cm_core;
+       struct i40iw_qp *iwqp;
+       struct i40iw_cm_info nfo;
+       unsigned long flags;
+
+       spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
+       if (atomic_dec_return(&cm_node->ref_count)) {
+               spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
+               return;
+       }
+       list_del(&cm_node->list);
+       spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
+
+       /* if the node is destroyed before connection was accelerated */
+       if (!cm_node->accelerated && cm_node->accept_pend) {
+               pr_err("node destroyed before established\n");
+               atomic_dec(&cm_node->listener->pend_accepts_cnt);
+       }
+       if (cm_node->close_entry)
+               i40iw_handle_close_entry(cm_node, 0);
+       if (cm_node->listener) {
+               i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true);
+       } else {
+               if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->map_loc_port)) &&
+                   cm_node->apbvt_set && cm_node->iwdev) {
+                       i40iw_manage_apbvt(cm_node->iwdev,
+                                          cm_node->map_loc_port,
+                                          I40IW_MANAGE_APBVT_DEL);
+                       i40iw_get_addr_info(cm_node, &nfo);
+                       i40iw_remove_mapinfo(&nfo);
+                       if (cm_node->qhash_set) {
+                               i40iw_manage_qhash(cm_node->iwdev,
+                                                  &nfo,
+                                                  I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
+                                                  NULL,
+                                                  false);
+                               cm_node->qhash_set = 0;
+                       }
+               }
+       }
+
+       iwqp = cm_node->iwqp;
+       if (iwqp) {
+               iwqp->cm_node = NULL;
+               i40iw_rem_ref(&iwqp->ibqp);
+               cm_node->iwqp = NULL;
+       } else if (cm_node->qhash_set) {
+               i40iw_get_addr_info(cm_node, &nfo);
+               i40iw_remove_mapinfo(&nfo);
+               i40iw_manage_qhash(cm_node->iwdev,
+                                  &nfo,
+                                  I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
+                                  NULL,
+                                  false);
+               cm_node->qhash_set = 0;
+       }
+
+       cm_node->cm_core->stats_nodes_destroyed++;
+       kfree(cm_node);
+}
+
+/**
+ * i40iw_handle_fin_pkt - FIN packet received
+ * @cm_node: connection's node
+ */
+static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node)
+{
+       u32 ret;
+
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_RCVD:
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_MPAREJ_RCVD:
+               cm_node->tcp_cntxt.rcv_nxt++;
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_LAST_ACK;
+               i40iw_send_fin(cm_node);
+               break;
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
+               cm_node->tcp_cntxt.rcv_nxt++;
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_FIN_WAIT1:
+               cm_node->tcp_cntxt.rcv_nxt++;
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSING;
+               i40iw_send_ack(cm_node);
+               /*
+                * Wait for ACK as this is simultaneous close.
+                * After we receive ACK, do not send anything.
+                * Just rm the node.
+                */
+               break;
+       case I40IW_CM_STATE_FIN_WAIT2:
+               cm_node->tcp_cntxt.rcv_nxt++;
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_TIME_WAIT;
+               i40iw_send_ack(cm_node);
+               ret =
+                   i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0);
+               if (ret)
+                       i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state);
+               break;
+       case I40IW_CM_STATE_TIME_WAIT:
+               cm_node->tcp_cntxt.rcv_nxt++;
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       case I40IW_CM_STATE_OFFLOADED:
+       default:
+               i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state);
+               break;
+       }
+}
+
+/**
+ * i40iw_handle_rst_pkt - process received RST packet
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
+                                struct i40iw_puda_buf *rbuf)
+{
+       i40iw_cleanup_retrans_entry(cm_node);
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               switch (cm_node->mpa_frame_rev) {
+               case IETF_MPA_V2:
+                       cm_node->mpa_frame_rev = IETF_MPA_V1;
+                       /* send a syn and goto syn sent state */
+                       cm_node->state = I40IW_CM_STATE_SYN_SENT;
+                       if (i40iw_send_syn(cm_node, 0))
+                               i40iw_active_open_err(cm_node, false);
+                       break;
+               case IETF_MPA_V1:
+               default:
+                       i40iw_active_open_err(cm_node, false);
+                       break;
+               }
+               break;
+       case I40IW_CM_STATE_MPAREQ_RCVD:
+               atomic_add_return(1, &cm_node->passive_state);
+               break;
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_SYN_RCVD:
+       case I40IW_CM_STATE_LISTENING:
+               i40iw_pr_err("Bad state state = %d\n", cm_node->state);
+               i40iw_passive_open_err(cm_node, false);
+               break;
+       case I40IW_CM_STATE_OFFLOADED:
+               i40iw_active_open_err(cm_node, false);
+               break;
+       case I40IW_CM_STATE_CLOSED:
+               break;
+       case I40IW_CM_STATE_FIN_WAIT2:
+       case I40IW_CM_STATE_FIN_WAIT1:
+       case I40IW_CM_STATE_LAST_ACK:
+               cm_node->cm_id->rem_ref(cm_node->cm_id);
+       case I40IW_CM_STATE_TIME_WAIT:
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       default:
+               break;
+       }
+}
+
+/**
+ * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node,
+                                struct i40iw_puda_buf *rbuf)
+{
+       int ret;
+       int datasize = rbuf->datalen;
+       u8 *dataloc = rbuf->data;
+
+       enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN;
+       u32 res_type;
+
+       ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize);
+       if (ret) {
+               if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT)
+                       i40iw_active_open_err(cm_node, true);
+               else
+                       i40iw_passive_open_err(cm_node, true);
+               return;
+       }
+
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_ESTABLISHED:
+               if (res_type == I40IW_MPA_REQUEST_REJECT)
+                       i40iw_pr_err("state for reject\n");
+               cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD;
+               type = I40IW_CM_EVENT_MPA_REQ;
+               i40iw_send_ack(cm_node);        /* ACK received MPA request */
+               atomic_set(&cm_node->passive_state,
+                          I40IW_PASSIVE_STATE_INDICATED);
+               break;
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               i40iw_cleanup_retrans_entry(cm_node);
+               if (res_type == I40IW_MPA_REQUEST_REJECT) {
+                       type = I40IW_CM_EVENT_MPA_REJECT;
+                       cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD;
+               } else {
+                       type = I40IW_CM_EVENT_CONNECTED;
+                       cm_node->state = I40IW_CM_STATE_OFFLOADED;
+                       i40iw_send_ack(cm_node);
+               }
+               break;
+       default:
+               pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state);
+               break;
+       }
+       i40iw_create_event(cm_node, type);
+}
+
+/**
+ * i40iw_indicate_pkt_err - Send up err event to cm
+ * @cm_node: connection's node
+ */
+static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node)
+{
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               i40iw_active_open_err(cm_node, true);
+               break;
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_SYN_RCVD:
+               i40iw_passive_open_err(cm_node, true);
+               break;
+       case I40IW_CM_STATE_OFFLOADED:
+       default:
+               break;
+       }
+}
+
+/**
+ * i40iw_check_syn - Check for error on received syn ack
+ * @cm_node: connection's node
+ * @tcph: pointer tcp header
+ */
+static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
+{
+       int err = 0;
+
+       if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) {
+               err = 1;
+               i40iw_active_open_err(cm_node, true);
+       }
+       return err;
+}
+
+/**
+ * i40iw_check_seq - check seq numbers if OK
+ * @cm_node: connection's node
+ * @tcph: pointer tcp header
+ */
+static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph)
+{
+       int err = 0;
+       u32 seq;
+       u32 ack_seq;
+       u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
+       u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
+       u32 rcv_wnd;
+
+       seq = ntohl(tcph->seq);
+       ack_seq = ntohl(tcph->ack_seq);
+       rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
+       if (ack_seq != loc_seq_num)
+               err = -1;
+       else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
+               err = -1;
+       if (err) {
+               i40iw_pr_err("seq number\n");
+               i40iw_indicate_pkt_err(cm_node);
+       }
+       return err;
+}
+
+/**
+ * i40iw_handle_syn_pkt - is for Passive node
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node,
+                                struct i40iw_puda_buf *rbuf)
+{
+       struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
+       int ret;
+       u32 inc_sequence;
+       int optionsize;
+       struct i40iw_cm_info nfo;
+
+       optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
+       inc_sequence = ntohl(tcph->seq);
+
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               /* Rcvd syn on active open connection */
+               i40iw_active_open_err(cm_node, 1);
+               break;
+       case I40IW_CM_STATE_LISTENING:
+               /* Passive OPEN */
+               if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
+                   cm_node->listener->backlog) {
+                       cm_node->cm_core->stats_backlog_drops++;
+                       i40iw_passive_open_err(cm_node, false);
+                       break;
+               }
+               ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
+               if (ret) {
+                       i40iw_passive_open_err(cm_node, false);
+                       /* drop pkt */
+                       break;
+               }
+               cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
+               cm_node->accept_pend = 1;
+               atomic_inc(&cm_node->listener->pend_accepts_cnt);
+
+               cm_node->state = I40IW_CM_STATE_SYN_RCVD;
+               i40iw_get_addr_info(cm_node, &nfo);
+               ret = i40iw_manage_qhash(cm_node->iwdev,
+                                        &nfo,
+                                        I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                        I40IW_QHASH_MANAGE_TYPE_ADD,
+                                        (void *)cm_node,
+                                        false);
+               cm_node->qhash_set = true;
+               break;
+       case I40IW_CM_STATE_CLOSED:
+               i40iw_cleanup_retrans_entry(cm_node);
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_OFFLOADED:
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_FIN_WAIT1:
+       case I40IW_CM_STATE_FIN_WAIT2:
+       case I40IW_CM_STATE_MPAREQ_RCVD:
+       case I40IW_CM_STATE_LAST_ACK:
+       case I40IW_CM_STATE_CLOSING:
+       case I40IW_CM_STATE_UNKNOWN:
+       default:
+               break;
+       }
+}
+
+/**
+ * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side)
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node,
+                                   struct i40iw_puda_buf *rbuf)
+{
+       struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
+       int ret;
+       u32 inc_sequence;
+       int optionsize;
+
+       optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
+       inc_sequence = ntohl(tcph->seq);
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_SENT:
+               i40iw_cleanup_retrans_entry(cm_node);
+               /* active open */
+               if (i40iw_check_syn(cm_node, tcph)) {
+                       i40iw_pr_err("check syn fail\n");
+                       return;
+               }
+               cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
+               /* setup options */
+               ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0);
+               if (ret) {
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "cm_node=%p tcp_options failed\n",
+                                   cm_node);
+                       break;
+               }
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
+               i40iw_send_ack(cm_node);        /* ACK  for the syn_ack */
+               ret = i40iw_send_mpa_request(cm_node);
+               if (ret) {
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "cm_node=%p i40iw_send_mpa_request failed\n",
+                                   cm_node);
+                       break;
+               }
+               cm_node->state = I40IW_CM_STATE_MPAREQ_SENT;
+               break;
+       case I40IW_CM_STATE_MPAREQ_RCVD:
+               i40iw_passive_open_err(cm_node, true);
+               break;
+       case I40IW_CM_STATE_LISTENING:
+               cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_CLOSED:
+               cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
+               i40iw_cleanup_retrans_entry(cm_node);
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_FIN_WAIT1:
+       case I40IW_CM_STATE_FIN_WAIT2:
+       case I40IW_CM_STATE_LAST_ACK:
+       case I40IW_CM_STATE_OFFLOADED:
+       case I40IW_CM_STATE_CLOSING:
+       case I40IW_CM_STATE_UNKNOWN:
+       case I40IW_CM_STATE_MPAREQ_SENT:
+       default:
+               break;
+       }
+}
+
+/**
+ * i40iw_handle_ack_pkt - process packet with ACK
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node,
+                               struct i40iw_puda_buf *rbuf)
+{
+       struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
+       u32 inc_sequence;
+       int ret = 0;
+       int optionsize;
+       u32 datasize = rbuf->datalen;
+
+       optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
+
+       if (i40iw_check_seq(cm_node, tcph))
+               return -EINVAL;
+
+       inc_sequence = ntohl(tcph->seq);
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_RCVD:
+               i40iw_cleanup_retrans_entry(cm_node);
+               ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1);
+               if (ret)
+                       break;
+               cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
+               cm_node->state = I40IW_CM_STATE_ESTABLISHED;
+               if (datasize) {
+                       cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
+                       i40iw_get_remote_addr(cm_node);
+                       i40iw_handle_rcv_mpa(cm_node, rbuf);
+               }
+               break;
+       case I40IW_CM_STATE_ESTABLISHED:
+               i40iw_cleanup_retrans_entry(cm_node);
+               if (datasize) {
+                       cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
+                       i40iw_handle_rcv_mpa(cm_node, rbuf);
+               }
+               break;
+       case I40IW_CM_STATE_MPAREQ_SENT:
+               cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
+               if (datasize) {
+                       cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
+                       i40iw_handle_rcv_mpa(cm_node, rbuf);
+               }
+               break;
+       case I40IW_CM_STATE_LISTENING:
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_CLOSED:
+               i40iw_cleanup_retrans_entry(cm_node);
+               atomic_inc(&cm_node->ref_count);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_LAST_ACK:
+       case I40IW_CM_STATE_CLOSING:
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_CLOSED;
+               if (!cm_node->accept_pend)
+                       cm_node->cm_id->rem_ref(cm_node->cm_id);
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       case I40IW_CM_STATE_FIN_WAIT1:
+               i40iw_cleanup_retrans_entry(cm_node);
+               cm_node->state = I40IW_CM_STATE_FIN_WAIT2;
+               break;
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_FIN_WAIT2:
+       case I40IW_CM_STATE_OFFLOADED:
+       case I40IW_CM_STATE_MPAREQ_RCVD:
+       case I40IW_CM_STATE_UNKNOWN:
+       default:
+               i40iw_cleanup_retrans_entry(cm_node);
+               break;
+       }
+       return ret;
+}
+
+/**
+ * i40iw_process_packet - process cm packet
+ * @cm_node: connection's node
+ * @rbuf: receive buffer
+ */
+static void i40iw_process_packet(struct i40iw_cm_node *cm_node,
+                                struct i40iw_puda_buf *rbuf)
+{
+       enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN;
+       struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph;
+       u32 fin_set = 0;
+       int ret;
+
+       if (tcph->rst) {
+               pkt_type = I40IW_PKT_TYPE_RST;
+       } else if (tcph->syn) {
+               pkt_type = I40IW_PKT_TYPE_SYN;
+               if (tcph->ack)
+                       pkt_type = I40IW_PKT_TYPE_SYNACK;
+       } else if (tcph->ack) {
+               pkt_type = I40IW_PKT_TYPE_ACK;
+       }
+       if (tcph->fin)
+               fin_set = 1;
+
+       switch (pkt_type) {
+       case I40IW_PKT_TYPE_SYN:
+               i40iw_handle_syn_pkt(cm_node, rbuf);
+               break;
+       case I40IW_PKT_TYPE_SYNACK:
+               i40iw_handle_synack_pkt(cm_node, rbuf);
+               break;
+       case I40IW_PKT_TYPE_ACK:
+               ret = i40iw_handle_ack_pkt(cm_node, rbuf);
+               if (fin_set && !ret)
+                       i40iw_handle_fin_pkt(cm_node);
+               break;
+       case I40IW_PKT_TYPE_RST:
+               i40iw_handle_rst_pkt(cm_node, rbuf);
+               break;
+       default:
+               if (fin_set &&
+                   (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph)))
+                       i40iw_handle_fin_pkt(cm_node);
+               break;
+       }
+}
+
+/**
+ * i40iw_make_listen_node - create a listen node with params
+ * @cm_core: cm's core
+ * @iwdev: iwarp device structure
+ * @cm_info: quad info for connection
+ */
+static struct i40iw_cm_listener *i40iw_make_listen_node(
+                                       struct i40iw_cm_core *cm_core,
+                                       struct i40iw_device *iwdev,
+                                       struct i40iw_cm_info *cm_info)
+{
+       struct i40iw_cm_listener *listener;
+       struct iwpm_dev_data pm_reg_msg;
+       struct iwpm_sa_data pm_msg;
+       int iwpm_err;
+       unsigned long flags;
+
+       /* cannot have multiple matching listeners */
+       listener = i40iw_find_listener(cm_core, cm_info->loc_addr,
+                                      cm_info->loc_port,
+                                      cm_info->vlan_id,
+                                      I40IW_CM_LISTENER_EITHER_STATE,
+                                      false);
+       if (listener &&
+           (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) {
+               atomic_dec(&listener->ref_count);
+               i40iw_debug(cm_core->dev,
+                           I40IW_DEBUG_CM,
+                           "Not creating listener since it already exists\n");
+               return NULL;
+       }
+
+       if (!listener) {
+               i40iw_form_reg_msg(iwdev, &pm_reg_msg);
+               iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW);
+               if (iwpm_err)
+                       i40iw_pr_err("PM register fail err = %d\n",
+                                    iwpm_err);
+
+               if (iwpm_valid_pid() && !iwpm_err) {
+                       i40iw_form_pm_msg(cm_info, &pm_msg);
+                       iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_I40IW);
+                       if (iwpm_err)
+                               i40iw_pr_err("PM query fail err = %d\n",
+                                            iwpm_err);
+                       else
+                               i40iw_record_pm_msg(cm_info, &pm_msg, false);
+               }
+
+               /* create a CM listen node (1/2 node to compare incoming traffic to) */
+               listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
+               if (!listener)
+                       return NULL;
+               cm_core->stats_listen_nodes_created++;
+               memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr));
+               memcpy(listener->map_loc_addr, cm_info->map_loc_addr,
+                      sizeof(listener->map_loc_addr));
+               listener->loc_port = cm_info->loc_port;
+               listener->map_loc_port = cm_info->map_loc_port;
+
+               INIT_LIST_HEAD(&listener->child_listen_list);
+
+               atomic_set(&listener->ref_count, 1);
+       } else {
+               listener->reused_node = 1;
+       }
+
+       listener->cm_id = cm_info->cm_id;
+       listener->ipv4 = cm_info->ipv4;
+       listener->vlan_id = cm_info->vlan_id;
+       atomic_set(&listener->pend_accepts_cnt, 0);
+       listener->cm_core = cm_core;
+       listener->iwdev = iwdev;
+
+       listener->backlog = cm_info->backlog;
+       listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE;
+
+       if (!listener->reused_node) {
+               spin_lock_irqsave(&cm_core->listen_list_lock, flags);
+               list_add(&listener->list, &cm_core->listen_nodes);
+               spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
+       }
+
+       return listener;
+}
+
+/**
+ * i40iw_create_cm_node - make a connection node with params
+ * @cm_core: cm's core
+ * @iwdev: iwarp device structure
+ * @private_data_len: len to provate data for mpa request
+ * @private_data: pointer to private data for connection
+ * @cm_info: quad info for connection
+ */
+static struct i40iw_cm_node *i40iw_create_cm_node(
+                                       struct i40iw_cm_core *cm_core,
+                                       struct i40iw_device *iwdev,
+                                       u16 private_data_len,
+                                       void *private_data,
+                                       struct i40iw_cm_info *cm_info)
+{
+       int ret;
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_cm_listener *loopback_remotelistener;
+       struct i40iw_cm_node *loopback_remotenode;
+       struct i40iw_cm_info loopback_cm_info;
+
+       /* create a CM connection node */
+       cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL);
+       if (!cm_node)
+               return NULL;
+       /* set our node side to client (active) side */
+       cm_node->tcp_cntxt.client = 1;
+       cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE;
+
+       if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) {
+               loopback_remotelistener = i40iw_find_listener(
+                                               cm_core,
+                                               cm_info->map_rem_addr,
+                                               cm_node->map_rem_port,
+                                               cm_node->vlan_id,
+                                               I40IW_CM_LISTENER_ACTIVE_STATE,
+                                               true);
+               if (!loopback_remotelistener) {
+                       i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED);
+               } else {
+                       loopback_cm_info = *cm_info;
+                       loopback_cm_info.loc_port = cm_info->rem_port;
+                       loopback_cm_info.rem_port = cm_info->loc_port;
+                       loopback_cm_info.map_loc_port = cm_info->map_rem_port;
+                       loopback_cm_info.map_rem_port = cm_info->map_loc_port;
+                       loopback_cm_info.cm_id = loopback_remotelistener->cm_id;
+                       loopback_cm_info.ipv4 = cm_info->ipv4;
+                       loopback_remotenode = i40iw_make_cm_node(cm_core,
+                                                                iwdev,
+                                                                &loopback_cm_info,
+                                                                loopback_remotelistener);
+                       if (!loopback_remotenode) {
+                               i40iw_rem_ref_cm_node(cm_node);
+                               return NULL;
+                       }
+                       cm_core->stats_loopbacks++;
+                       loopback_remotenode->loopbackpartner = cm_node;
+                       loopback_remotenode->tcp_cntxt.rcv_wscale =
+                               I40IW_CM_DEFAULT_RCV_WND_SCALE;
+                       cm_node->loopbackpartner = loopback_remotenode;
+                       memcpy(loopback_remotenode->pdata_buf, private_data,
+                              private_data_len);
+                       loopback_remotenode->pdata.size = private_data_len;
+
+                       cm_node->state = I40IW_CM_STATE_OFFLOADED;
+                       cm_node->tcp_cntxt.rcv_nxt =
+                               loopback_remotenode->tcp_cntxt.loc_seq_num;
+                       loopback_remotenode->tcp_cntxt.rcv_nxt =
+                               cm_node->tcp_cntxt.loc_seq_num;
+                       cm_node->tcp_cntxt.max_snd_wnd =
+                               loopback_remotenode->tcp_cntxt.rcv_wnd;
+                       loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
+                       cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd;
+                       loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd;
+                       cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale;
+                       loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale;
+                       loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD;
+                       i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ);
+               }
+               return cm_node;
+       }
+
+       cm_node->pdata.size = private_data_len;
+       cm_node->pdata.addr = cm_node->pdata_buf;
+
+       memcpy(cm_node->pdata_buf, private_data, private_data_len);
+
+       cm_node->state = I40IW_CM_STATE_SYN_SENT;
+       ret = i40iw_send_syn(cm_node, 0);
+
+       if (ret) {
+               if (cm_node->ipv4)
+                       i40iw_debug(cm_node->dev,
+                                   I40IW_DEBUG_CM,
+                                   "Api - connect() FAILED: dest addr=%pI4",
+                                   cm_node->rem_addr);
+               else
+                       i40iw_debug(cm_node->dev, I40IW_DEBUG_CM,
+                                   "Api - connect() FAILED: dest addr=%pI6",
+                                   cm_node->rem_addr);
+               i40iw_rem_ref_cm_node(cm_node);
+               cm_node = NULL;
+       }
+
+       if (cm_node)
+               i40iw_debug(cm_node->dev,
+                           I40IW_DEBUG_CM,
+                           "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n",
+                           cm_node->rem_port,
+                           cm_node,
+                           cm_node->cm_id);
+
+       return cm_node;
+}
+
+/**
+ * i40iw_cm_reject - reject and teardown a connection
+ * @cm_node: connection's node
+ * @pdate: ptr to private data for reject
+ * @plen: size of private data
+ */
+static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen)
+{
+       int ret = 0;
+       int err;
+       int passive_state;
+       struct iw_cm_id *cm_id = cm_node->cm_id;
+       struct i40iw_cm_node *loopback = cm_node->loopbackpartner;
+
+       if (cm_node->tcp_cntxt.client)
+               return ret;
+       i40iw_cleanup_retrans_entry(cm_node);
+
+       if (!loopback) {
+               passive_state = atomic_add_return(1, &cm_node->passive_state);
+               if (passive_state == I40IW_SEND_RESET_EVENT) {
+                       cm_node->state = I40IW_CM_STATE_CLOSED;
+                       i40iw_rem_ref_cm_node(cm_node);
+               } else {
+                       if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
+                               i40iw_rem_ref_cm_node(cm_node);
+                       } else {
+                               ret = i40iw_send_mpa_reject(cm_node, pdata, plen);
+                               if (ret) {
+                                       cm_node->state = I40IW_CM_STATE_CLOSED;
+                                       err = i40iw_send_reset(cm_node);
+                                       if (err)
+                                               i40iw_pr_err("send reset failed\n");
+                               } else {
+                                       cm_id->add_ref(cm_id);
+                               }
+                       }
+               }
+       } else {
+               cm_node->cm_id = NULL;
+               if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
+                       i40iw_rem_ref_cm_node(cm_node);
+                       i40iw_rem_ref_cm_node(loopback);
+               } else {
+                       ret = i40iw_send_cm_event(loopback,
+                                                 loopback->cm_id,
+                                                 IW_CM_EVENT_CONNECT_REPLY,
+                                                 -ECONNREFUSED);
+                       i40iw_rem_ref_cm_node(cm_node);
+                       loopback->state = I40IW_CM_STATE_CLOSING;
+
+                       cm_id = loopback->cm_id;
+                       i40iw_rem_ref_cm_node(loopback);
+                       cm_id->rem_ref(cm_id);
+               }
+       }
+
+       return ret;
+}
+
+/**
+ * i40iw_cm_close - close of cm connection
+ * @cm_node: connection's node
+ */
+static int i40iw_cm_close(struct i40iw_cm_node *cm_node)
+{
+       int ret = 0;
+
+       if (!cm_node)
+               return -EINVAL;
+
+       switch (cm_node->state) {
+       case I40IW_CM_STATE_SYN_RCVD:
+       case I40IW_CM_STATE_SYN_SENT:
+       case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED:
+       case I40IW_CM_STATE_ESTABLISHED:
+       case I40IW_CM_STATE_ACCEPTING:
+       case I40IW_CM_STATE_MPAREQ_SENT:
+       case I40IW_CM_STATE_MPAREQ_RCVD:
+               i40iw_cleanup_retrans_entry(cm_node);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_CLOSE_WAIT:
+               cm_node->state = I40IW_CM_STATE_LAST_ACK;
+               i40iw_send_fin(cm_node);
+               break;
+       case I40IW_CM_STATE_FIN_WAIT1:
+       case I40IW_CM_STATE_FIN_WAIT2:
+       case I40IW_CM_STATE_LAST_ACK:
+       case I40IW_CM_STATE_TIME_WAIT:
+       case I40IW_CM_STATE_CLOSING:
+               ret = -1;
+               break;
+       case I40IW_CM_STATE_LISTENING:
+               i40iw_cleanup_retrans_entry(cm_node);
+               i40iw_send_reset(cm_node);
+               break;
+       case I40IW_CM_STATE_MPAREJ_RCVD:
+       case I40IW_CM_STATE_UNKNOWN:
+       case I40IW_CM_STATE_INITED:
+       case I40IW_CM_STATE_CLOSED:
+       case I40IW_CM_STATE_LISTENER_DESTROYED:
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       case I40IW_CM_STATE_OFFLOADED:
+               if (cm_node->send_entry)
+                       i40iw_pr_err("send_entry\n");
+               i40iw_rem_ref_cm_node(cm_node);
+               break;
+       }
+       return ret;
+}
+
+/**
+ * i40iw_receive_ilq - recv an ETHERNET packet, and process it
+ * through CM
+ * @dev: FPK dev struct
+ * @rbuf: receive buffer
+ */
+void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf)
+{
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_cm_listener *listener;
+       struct iphdr *iph;
+       struct ipv6hdr *ip6h;
+       struct tcphdr *tcph;
+       struct i40iw_cm_info cm_info;
+       struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
+       struct i40iw_cm_core *cm_core = &iwdev->cm_core;
+       struct vlan_ethhdr *ethh;
+
+       /* if vlan, then maclen = 18 else 14 */
+       iph = (struct iphdr *)rbuf->iph;
+       memset(&cm_info, 0, sizeof(cm_info));
+
+       i40iw_debug_buf(dev,
+                       I40IW_DEBUG_ILQ,
+                       "RECEIVE ILQ BUFFER",
+                       rbuf->mem.va,
+                       rbuf->totallen);
+       ethh = (struct vlan_ethhdr *)rbuf->mem.va;
+
+       if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) {
+               cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK;
+               i40iw_debug(cm_core->dev,
+                           I40IW_DEBUG_CM,
+                           "%s vlan_id=%d\n",
+                           __func__,
+                           cm_info.vlan_id);
+       } else {
+               cm_info.vlan_id = I40IW_NO_VLAN;
+       }
+       tcph = (struct tcphdr *)rbuf->tcph;
+
+       if (rbuf->ipv4) {
+               cm_info.loc_addr[0] = ntohl(iph->daddr);
+               cm_info.rem_addr[0] = ntohl(iph->saddr);
+               cm_info.ipv4 = true;
+       } else {
+               ip6h = (struct ipv6hdr *)rbuf->iph;
+               i40iw_copy_ip_ntohl(cm_info.loc_addr,
+                                   ip6h->daddr.in6_u.u6_addr32);
+               i40iw_copy_ip_ntohl(cm_info.rem_addr,
+                                   ip6h->saddr.in6_u.u6_addr32);
+               cm_info.ipv4 = false;
+       }
+       cm_info.loc_port = ntohs(tcph->dest);
+       cm_info.rem_port = ntohs(tcph->source);
+       i40iw_init_mapinfo(&cm_info);
+
+       cm_node = i40iw_find_node(cm_core,
+                                 cm_info.map_rem_port,
+                                 cm_info.map_rem_addr,
+                                 cm_info.map_loc_port,
+                                 cm_info.map_loc_addr,
+                                 true);
+
+       if (!cm_node) {
+               /* Only type of packet accepted are for */
+               /* the PASSIVE open (syn only) */
+               if (!tcph->syn || tcph->ack)
+                       return;
+               listener =
+                   i40iw_find_listener(cm_core,
+                                       cm_info.map_loc_addr,
+                                       cm_info.map_loc_port,
+                                       cm_info.vlan_id,
+                                       I40IW_CM_LISTENER_ACTIVE_STATE,
+                                       true);
+               if (!listener) {
+                       cm_info.cm_id = NULL;
+                       i40iw_debug(cm_core->dev,
+                                   I40IW_DEBUG_CM,
+                                   "%s no listener found\n",
+                                   __func__);
+                       return;
+               }
+               cm_info.cm_id = listener->cm_id;
+               cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener);
+               if (!cm_node) {
+                       i40iw_debug(cm_core->dev,
+                                   I40IW_DEBUG_CM,
+                                   "%s allocate node failed\n",
+                                   __func__);
+                       atomic_dec(&listener->ref_count);
+                       return;
+               }
+               if (!tcph->rst && !tcph->fin) {
+                       cm_node->state = I40IW_CM_STATE_LISTENING;
+               } else {
+                       i40iw_rem_ref_cm_node(cm_node);
+                       return;
+               }
+               atomic_inc(&cm_node->ref_count);
+       } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) {
+               i40iw_rem_ref_cm_node(cm_node);
+               return;
+       }
+       i40iw_process_packet(cm_node, rbuf);
+       i40iw_rem_ref_cm_node(cm_node);
+}
+
+/**
+ * i40iw_setup_cm_core - allocate a top level instance of a cm
+ * core
+ * @iwdev: iwarp device structure
+ */
+void i40iw_setup_cm_core(struct i40iw_device *iwdev)
+{
+       struct i40iw_cm_core *cm_core = &iwdev->cm_core;
+
+       cm_core->iwdev = iwdev;
+       cm_core->dev = &iwdev->sc_dev;
+
+       INIT_LIST_HEAD(&cm_core->connected_nodes);
+       INIT_LIST_HEAD(&cm_core->listen_nodes);
+
+       init_timer(&cm_core->tcp_timer);
+       cm_core->tcp_timer.function = i40iw_cm_timer_tick;
+       cm_core->tcp_timer.data = (unsigned long)cm_core;
+
+       spin_lock_init(&cm_core->ht_lock);
+       spin_lock_init(&cm_core->listen_list_lock);
+
+       cm_core->event_wq = create_singlethread_workqueue("iwewq");
+       cm_core->disconn_wq = create_singlethread_workqueue("iwdwq");
+}
+
+/**
+ * i40iw_cleanup_cm_core - deallocate a top level instance of a
+ * cm core
+ * @cm_core: cm's core
+ */
+void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core)
+{
+       unsigned long flags;
+
+       if (!cm_core)
+               return;
+
+       spin_lock_irqsave(&cm_core->ht_lock, flags);
+       if (timer_pending(&cm_core->tcp_timer))
+               del_timer_sync(&cm_core->tcp_timer);
+       spin_unlock_irqrestore(&cm_core->ht_lock, flags);
+
+       destroy_workqueue(cm_core->event_wq);
+       destroy_workqueue(cm_core->disconn_wq);
+}
+
+/**
+ * i40iw_init_tcp_ctx - setup qp context
+ * @cm_node: connection's node
+ * @tcp_info: offload info for tcp
+ * @iwqp: associate qp for the connection
+ */
+static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node,
+                              struct i40iw_tcp_offload_info *tcp_info,
+                              struct i40iw_qp *iwqp)
+{
+       tcp_info->ipv4 = cm_node->ipv4;
+       tcp_info->drop_ooo_seg = true;
+       tcp_info->wscale = true;
+       tcp_info->ignore_tcp_opt = true;
+       tcp_info->ignore_tcp_uns_opt = true;
+       tcp_info->no_nagle = false;
+
+       tcp_info->ttl = I40IW_DEFAULT_TTL;
+       tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR);
+       tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH);
+       tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH;
+
+       tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED;
+       tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale;
+       tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale;
+
+       tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
+       tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
+       tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
+       tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
+
+       tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
+       tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
+       tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
+       tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
+       tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
+       tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
+                                       cm_node->tcp_cntxt.rcv_wscale);
+
+       tcp_info->flow_label = 0;
+       tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss));
+       if (cm_node->vlan_id < VLAN_TAG_PRESENT) {
+               tcp_info->insert_vlan_tag = true;
+               tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id);
+       }
+       if (cm_node->ipv4) {
+               tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port);
+               tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port);
+
+               tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[0]);
+               tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[0]);
+               tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev,
+                                                               &tcp_info->dest_ip_addr3,
+                                                               true,
+                                                               NULL,
+                                                               I40IW_ARP_RESOLVE));
+       } else {
+               tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port);
+               tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port);
+               tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->map_rem_addr[0]);
+               tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->map_rem_addr[1]);
+               tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->map_rem_addr[2]);
+               tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[3]);
+               tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->map_loc_addr[0]);
+               tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->map_loc_addr[1]);
+               tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->map_loc_addr[2]);
+               tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[3]);
+               tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(
+                                                       iwqp->iwdev,
+                                                       &tcp_info->dest_ip_addr0,
+                                                       false,
+                                                       NULL,
+                                                       I40IW_ARP_RESOLVE));
+       }
+}
+
+/**
+ * i40iw_cm_init_tsa_conn - setup qp for RTS
+ * @iwqp: associate qp for the connection
+ * @cm_node: connection's node
+ */
+static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp,
+                                  struct i40iw_cm_node *cm_node)
+{
+       struct i40iw_tcp_offload_info tcp_info;
+       struct i40iwarp_offload_info *iwarp_info;
+       struct i40iw_qp_host_ctx_info *ctx_info;
+       struct i40iw_device *iwdev = iwqp->iwdev;
+       struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev;
+
+       memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info));
+       iwarp_info = &iwqp->iwarp_info;
+       ctx_info = &iwqp->ctx_info;
+
+       ctx_info->tcp_info = &tcp_info;
+       ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id;
+       ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id;
+
+       iwarp_info->ord_size = cm_node->ord_size;
+       iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size);
+
+       if (iwarp_info->ord_size == 1)
+               iwarp_info->ord_size = 2;
+
+       iwarp_info->rd_enable = true;
+       iwarp_info->rdmap_ver = 1;
+       iwarp_info->ddp_ver = 1;
+
+       iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id;
+
+       ctx_info->tcp_info_valid = true;
+       ctx_info->iwarp_info_valid = true;
+
+       i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp);
+       if (cm_node->snd_mark_en) {
+               iwarp_info->snd_mark_en = true;
+               iwarp_info->snd_mark_offset = (tcp_info.snd_nxt &
+                               SNDMARKER_SEQNMASK) + cm_node->lsmm_size;
+       }
+
+       cm_node->state = I40IW_CM_STATE_OFFLOADED;
+       tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED;
+       tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx;
+
+       dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info);
+
+       /* once tcp_info is set, no need to do it again */
+       ctx_info->tcp_info_valid = false;
+       ctx_info->iwarp_info_valid = false;
+}
+
+/**
+ * i40iw_cm_disconn - when a connection is being closed
+ * @iwqp: associate qp for the connection
+ */
+int i40iw_cm_disconn(struct i40iw_qp *iwqp)
+{
+       struct disconn_work *work;
+       struct i40iw_device *iwdev = iwqp->iwdev;
+       struct i40iw_cm_core *cm_core = &iwdev->cm_core;
+
+       work = kzalloc(sizeof(*work), GFP_ATOMIC);
+       if (!work)
+               return -ENOMEM; /* Timer will clean up */
+
+       i40iw_add_ref(&iwqp->ibqp);
+       work->iwqp = iwqp;
+       INIT_WORK(&work->work, i40iw_disconnect_worker);
+       queue_work(cm_core->disconn_wq, &work->work);
+       return 0;
+}
+
+/**
+ * i40iw_loopback_nop - Send a nop
+ * @qp: associated hw qp
+ */
+static void i40iw_loopback_nop(struct i40iw_sc_qp *qp)
+{
+       u64 *wqe;
+       u64 header;
+
+       wqe = qp->qp_uk.sq_base->elem;
+       set_64bit_val(wqe, 0, 0);
+       set_64bit_val(wqe, 8, 0);
+       set_64bit_val(wqe, 16, 0);
+
+       header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) |
+           LS_64(0, I40IWQPSQ_SIGCOMPL) |
+           LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID);
+       set_64bit_val(wqe, 24, header);
+}
+
+/**
+ * i40iw_qp_disconnect - free qp and close cm
+ * @iwqp: associate qp for the connection
+ */
+static void i40iw_qp_disconnect(struct i40iw_qp *iwqp)
+{
+       struct i40iw_device *iwdev;
+       struct i40iw_ib_device *iwibdev;
+
+       iwdev = to_iwdev(iwqp->ibqp.device);
+       if (!iwdev) {
+               i40iw_pr_err("iwdev == NULL\n");
+               return;
+       }
+
+       iwibdev = iwdev->iwibdev;
+
+       if (iwqp->active_conn) {
+               /* indicate this connection is NOT active */
+               iwqp->active_conn = 0;
+       } else {
+               /* Need to free the Last Streaming Mode Message */
+               if (iwqp->ietf_mem.va) {
+                       if (iwqp->lsmm_mr)
+                               iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr);
+                       i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem);
+               }
+       }
+
+       /* close the CM node down if it is still active */
+       if (iwqp->cm_node) {
+               i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__);
+               i40iw_cm_close(iwqp->cm_node);
+       }
+}
+
+/**
+ * i40iw_cm_disconn_true - called by worker thread to disconnect qp
+ * @iwqp: associate qp for the connection
+ */
+static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp)
+{
+       struct iw_cm_id *cm_id;
+       struct i40iw_device *iwdev;
+       struct i40iw_sc_qp *qp = &iwqp->sc_qp;
+       u16 last_ae;
+       u8 original_hw_tcp_state;
+       u8 original_ibqp_state;
+       int disconn_status = 0;
+       int issue_disconn = 0;
+       int issue_close = 0;
+       int issue_flush = 0;
+       struct ib_event ibevent;
+       unsigned long flags;
+       int ret;
+
+       if (!iwqp) {
+               i40iw_pr_err("iwqp == NULL\n");
+               return;
+       }
+
+       spin_lock_irqsave(&iwqp->lock, flags);
+       cm_id = iwqp->cm_id;
+       /* make sure we havent already closed this connection */
+       if (!cm_id) {
+               spin_unlock_irqrestore(&iwqp->lock, flags);
+               return;
+       }
+
+       iwdev = to_iwdev(iwqp->ibqp.device);
+
+       original_hw_tcp_state = iwqp->hw_tcp_state;
+       original_ibqp_state = iwqp->ibqp_state;
+       last_ae = iwqp->last_aeq;
+
+       if (qp->term_flags) {
+               issue_disconn = 1;
+               issue_close = 1;
+               iwqp->cm_id = NULL;
+               /*When term timer expires after cm_timer, don't want
+                *terminate-handler to issue cm_disconn which can re-free
+                *a QP even after its refcnt=0.
+                */
+               del_timer(&iwqp->terminate_timer);
+               if (!iwqp->flush_issued) {
+                       iwqp->flush_issued = 1;
+                       issue_flush = 1;
+               }
+       } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) ||
+                  ((original_ibqp_state == IB_QPS_RTS) &&
+                   (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
+               issue_disconn = 1;
+               if (last_ae == I40IW_AE_LLP_CONNECTION_RESET)
+                       disconn_status = -ECONNRESET;
+       }
+
+       if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) ||
+            (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) ||
+            (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) ||
+            (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) {
+               issue_close = 1;
+               iwqp->cm_id = NULL;
+               if (!iwqp->flush_issued) {
+                       iwqp->flush_issued = 1;
+                       issue_flush = 1;
+               }
+       }
+
+       spin_unlock_irqrestore(&iwqp->lock, flags);
+       if (issue_flush && !iwqp->destroyed) {
+               /* Flush the queues */
+               i40iw_flush_wqes(iwdev, iwqp);
+
+               if (qp->term_flags) {
+                       ibevent.device = iwqp->ibqp.device;
+                       ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ?
+                                       IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR;
+                       ibevent.element.qp = &iwqp->ibqp;
+                       iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context);
+               }
+       }
+
+       if (cm_id && cm_id->event_handler) {
+               if (issue_disconn) {
+                       ret = i40iw_send_cm_event(NULL,
+                                                 cm_id,
+                                                 IW_CM_EVENT_DISCONNECT,
+                                                 disconn_status);
+
+                       if (ret)
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "disconnect event failed %s: - cm_id = %p\n",
+                                           __func__, cm_id);
+               }
+               if (issue_close) {
+                       i40iw_qp_disconnect(iwqp);
+                       cm_id->provider_data = iwqp;
+                       ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0);
+                       if (ret)
+                               i40iw_debug(&iwdev->sc_dev,
+                                           I40IW_DEBUG_CM,
+                                           "close event failed %s: - cm_id = %p\n",
+                                           __func__, cm_id);
+                       cm_id->rem_ref(cm_id);
+               }
+       }
+}
+
+/**
+ * i40iw_disconnect_worker - worker for connection close
+ * @work: points or disconn structure
+ */
+static void i40iw_disconnect_worker(struct work_struct *work)
+{
+       struct disconn_work *dwork = container_of(work, struct disconn_work, work);
+       struct i40iw_qp *iwqp = dwork->iwqp;
+
+       kfree(dwork);
+       i40iw_cm_disconn_true(iwqp);
+       i40iw_rem_ref(&iwqp->ibqp);
+}
+
+/**
+ * i40iw_accept - registered call for connection to be accepted
+ * @cm_id: cm information for passive connection
+ * @conn_param: accpet parameters
+ */
+int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+       struct ib_qp *ibqp;
+       struct i40iw_qp *iwqp;
+       struct i40iw_device *iwdev;
+       struct i40iw_sc_dev *dev;
+       struct i40iw_cm_node *cm_node;
+       struct ib_qp_attr attr;
+       int passive_state;
+       struct i40iw_ib_device *iwibdev;
+       struct ib_mr *ibmr;
+       struct i40iw_pd *iwpd;
+       u16 buf_len = 0;
+       struct i40iw_kmem_info accept;
+       enum i40iw_status_code status;
+       u64 tagged_offset;
+
+       memset(&attr, 0, sizeof(attr));
+       ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
+       if (!ibqp)
+               return -EINVAL;
+
+       iwqp = to_iwqp(ibqp);
+       iwdev = iwqp->iwdev;
+       dev = &iwdev->sc_dev;
+       cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
+
+       if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) {
+               cm_node->ipv4 = true;
+               cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr);
+       } else {
+               cm_node->ipv4 = false;
+               i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL);
+       }
+       i40iw_debug(cm_node->dev,
+                   I40IW_DEBUG_CM,
+                   "Accept vlan_id=%d\n",
+                   cm_node->vlan_id);
+       if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) {
+               if (cm_node->loopbackpartner)
+                       i40iw_rem_ref_cm_node(cm_node->loopbackpartner);
+               i40iw_rem_ref_cm_node(cm_node);
+               return -EINVAL;
+       }
+
+       passive_state = atomic_add_return(1, &cm_node->passive_state);
+       if (passive_state == I40IW_SEND_RESET_EVENT) {
+               i40iw_rem_ref_cm_node(cm_node);
+               return -ECONNRESET;
+       }
+
+       cm_node->cm_core->stats_accepts++;
+       iwqp->cm_node = (void *)cm_node;
+       cm_node->iwqp = iwqp;
+
+       buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN;
+
+       status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1);
+
+       if (status)
+               return -ENOMEM;
+       cm_node->pdata.size = conn_param->private_data_len;
+       accept.addr = iwqp->ietf_mem.va;
+       accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY);
+       memcpy(accept.addr + accept.size, conn_param->private_data,
+              conn_param->private_data_len);
+
+       /* setup our first outgoing iWarp send WQE (the IETF frame response) */
+       if ((cm_node->ipv4 &&
+            !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) ||
+           (!cm_node->ipv4 &&
+            !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) {
+               iwibdev = iwdev->iwibdev;
+               iwpd = iwqp->iwpd;
+               tagged_offset = (uintptr_t)iwqp->ietf_mem.va;
+               ibmr = i40iw_reg_phys_mr(&iwpd->ibpd,
+                                        iwqp->ietf_mem.pa,
+                                        buf_len,
+                                        IB_ACCESS_LOCAL_WRITE,
+                                        &tagged_offset);
+               if (IS_ERR(ibmr)) {
+                       i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem);
+                       return -ENOMEM;
+               }
+
+               ibmr->pd = &iwpd->ibpd;
+               ibmr->device = iwpd->ibpd.device;
+               iwqp->lsmm_mr = ibmr;
+               if (iwqp->page)
+                       iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
+               if (is_remote_ne020_or_chelsio(cm_node))
+                       dev->iw_priv_qp_ops->qp_send_lsmm(
+                                                       &iwqp->sc_qp,
+                                                       iwqp->ietf_mem.va,
+                                                       (accept.size + conn_param->private_data_len),
+                                                       ibmr->lkey);
+               else
+                       dev->iw_priv_qp_ops->qp_send_lsmm(
+                                                       &iwqp->sc_qp,
+                                                       iwqp->ietf_mem.va,
+                                                       (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN),
+                                                       ibmr->lkey);
+
+       } else {
+               if (iwqp->page)
+                       iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
+               i40iw_loopback_nop(&iwqp->sc_qp);
+       }
+
+       if (iwqp->page)
+               kunmap(iwqp->page);
+
+       iwqp->cm_id = cm_id;
+       cm_node->cm_id = cm_id;
+
+       cm_id->provider_data = (void *)iwqp;
+       iwqp->active_conn = 0;
+
+       cm_node->lsmm_size = accept.size + conn_param->private_data_len;
+       i40iw_cm_init_tsa_conn(iwqp, cm_node);
+       cm_id->add_ref(cm_id);
+       i40iw_add_ref(&iwqp->ibqp);
+
+       i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0);
+
+       attr.qp_state = IB_QPS_RTS;
+       cm_node->qhash_set = false;
+       i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
+       if (cm_node->loopbackpartner) {
+               cm_node->loopbackpartner->pdata.size = conn_param->private_data_len;
+
+               /* copy entire MPA frame to our cm_node's frame */
+               memcpy(cm_node->loopbackpartner->pdata_buf,
+                      conn_param->private_data,
+                      conn_param->private_data_len);
+               i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED);
+       }
+
+       cm_node->accelerated = 1;
+       if (cm_node->accept_pend) {
+               if (!cm_node->listener)
+                       i40iw_pr_err("cm_node->listener NULL for passive node\n");
+               atomic_dec(&cm_node->listener->pend_accepts_cnt);
+               cm_node->accept_pend = 0;
+       }
+       return 0;
+}
+
+/**
+ * i40iw_reject - registered call for connection to be rejected
+ * @cm_id: cm information for passive connection
+ * @pdata: private data to be sent
+ * @pdata_len: private data length
+ */
+int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+       struct i40iw_device *iwdev;
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_cm_node *loopback;
+
+       cm_node = (struct i40iw_cm_node *)cm_id->provider_data;
+       loopback = cm_node->loopbackpartner;
+       cm_node->cm_id = cm_id;
+       cm_node->pdata.size = pdata_len;
+
+       iwdev = to_iwdev(cm_id->device);
+       if (!iwdev)
+               return -EINVAL;
+       cm_node->cm_core->stats_rejects++;
+
+       if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
+               return -EINVAL;
+
+       if (loopback) {
+               memcpy(&loopback->pdata_buf, pdata, pdata_len);
+               loopback->pdata.size = pdata_len;
+       }
+
+       return i40iw_cm_reject(cm_node, pdata, pdata_len);
+}
+
+/**
+ * i40iw_connect - registered call for connection to be established
+ * @cm_id: cm information for passive connection
+ * @conn_param: Information about the connection
+ */
+int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+       struct ib_qp *ibqp;
+       struct i40iw_qp *iwqp;
+       struct i40iw_device *iwdev;
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_cm_info cm_info;
+       struct sockaddr_in *laddr;
+       struct sockaddr_in *raddr;
+       struct sockaddr_in6 *laddr6;
+       struct sockaddr_in6 *raddr6;
+       struct iwpm_dev_data pm_reg_msg;
+       struct iwpm_sa_data pm_msg;
+       int apbvt_set = 0;
+       enum i40iw_status_code status;
+       int iwpm_err;
+
+       ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn);
+       if (!ibqp)
+               return -EINVAL;
+       iwqp = to_iwqp(ibqp);
+       if (!iwqp)
+               return -EINVAL;
+       iwdev = to_iwdev(iwqp->ibqp.device);
+       if (!iwdev)
+               return -EINVAL;
+
+       laddr = (struct sockaddr_in *)&cm_id->local_addr;
+       raddr = (struct sockaddr_in *)&cm_id->remote_addr;
+       laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
+       raddr6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
+
+       if (!(laddr->sin_port) || !(raddr->sin_port))
+               return -EINVAL;
+
+       iwqp->active_conn = 1;
+       iwqp->cm_id = NULL;
+       cm_id->provider_data = iwqp;
+
+       /* set up the connection params for the node */
+       if (cm_id->remote_addr.ss_family == AF_INET) {
+               cm_info.ipv4 = true;
+               memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr));
+               memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr));
+               cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
+               cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr);
+               cm_info.loc_port = ntohs(laddr->sin_port);
+               cm_info.rem_port = ntohs(raddr->sin_port);
+               cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
+       } else {
+               cm_info.ipv4 = false;
+               i40iw_copy_ip_ntohl(cm_info.loc_addr,
+                                   laddr6->sin6_addr.in6_u.u6_addr32);
+               i40iw_copy_ip_ntohl(cm_info.rem_addr,
+                                   raddr6->sin6_addr.in6_u.u6_addr32);
+               cm_info.loc_port = ntohs(laddr6->sin6_port);
+               cm_info.rem_port = ntohs(raddr6->sin6_port);
+               i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL);
+       }
+       i40iw_init_mapinfo(&cm_info);
+       cm_info.cm_id = cm_id;
+
+       i40iw_form_reg_msg(iwdev, &pm_reg_msg);
+       iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW);
+       if (iwpm_err)
+               i40iw_pr_err("PM register fail err = %d\n",
+                            iwpm_err);
+
+       if (iwpm_valid_pid() && !iwpm_err) {
+               i40iw_form_pm_msg(&cm_info, &pm_msg);
+               iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_I40IW);
+               if (iwpm_err)
+                       i40iw_pr_err("PM query fail err = %d\n",
+                                    iwpm_err);
+               else
+                       i40iw_record_pm_msg(&cm_info, &pm_msg, true);
+       }
+
+       if (i40iw_create_mapinfo(&cm_info)) {
+               i40iw_pr_err("Fail to create mapinfo\n");
+               return -ENOMEM;
+       }
+
+       if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) ||
+           (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32,
+                                    raddr6->sin6_addr.in6_u.u6_addr32,
+                                    sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) {
+               status = i40iw_manage_qhash(iwdev,
+                                           &cm_info,
+                                           I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                           I40IW_QHASH_MANAGE_TYPE_ADD,
+                                           NULL,
+                                           true);
+               if (status) {
+                       i40iw_remove_mapinfo(&cm_info);
+                       return -EINVAL;
+               }
+       }
+       status = i40iw_manage_apbvt(iwdev, cm_info.map_loc_port, I40IW_MANAGE_APBVT_ADD);
+       if (status) {
+               i40iw_remove_mapinfo(&cm_info);
+               i40iw_manage_qhash(iwdev,
+                                  &cm_info,
+                                  I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
+                                  NULL,
+                                  false);
+               return -EINVAL;
+       }
+
+       apbvt_set = 1;
+       cm_id->add_ref(cm_id);
+       cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev,
+                                      conn_param->private_data_len,
+                                      (void *)conn_param->private_data,
+                                      &cm_info);
+       if (!cm_node) {
+               i40iw_manage_qhash(iwdev,
+                                  &cm_info,
+                                  I40IW_QHASH_TYPE_TCP_ESTABLISHED,
+                                  I40IW_QHASH_MANAGE_TYPE_DELETE,
+                                  NULL,
+                                  false);
+
+               if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core,
+                                                          cm_info.map_loc_port))
+                       i40iw_manage_apbvt(iwdev,
+                                          cm_info.map_loc_port,
+                                          I40IW_MANAGE_APBVT_DEL);
+
+               i40iw_remove_mapinfo(&cm_info);
+               cm_id->rem_ref(cm_id);
+               iwdev->cm_core.stats_connect_errs++;
+               return -ENOMEM;
+       }
+
+       i40iw_record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
+       if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
+           !cm_node->ord_size)
+               cm_node->ord_size = 1;
+
+       cm_node->apbvt_set = apbvt_set;
+       cm_node->qhash_set = true;
+       iwqp->cm_node = cm_node;
+       cm_node->iwqp = iwqp;
+       iwqp->cm_id = cm_id;
+       i40iw_add_ref(&iwqp->ibqp);
+       return 0;
+}
+
+/**
+ * i40iw_create_listen - registered call creating listener
+ * @cm_id: cm information for passive connection
+ * @backlog: to max accept pending count
+ */
+int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog)
+{
+       struct i40iw_device *iwdev;
+       struct i40iw_cm_listener *cm_listen_node;
+       struct i40iw_cm_info cm_info;
+       enum i40iw_status_code ret;
+       struct sockaddr_in *laddr;
+       struct sockaddr_in6 *laddr6;
+       bool wildcard = false;
+
+       iwdev = to_iwdev(cm_id->device);
+       if (!iwdev)
+               return -EINVAL;
+
+       laddr = (struct sockaddr_in *)&cm_id->local_addr;
+       laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
+       memset(&cm_info, 0, sizeof(cm_info));
+       if (laddr->sin_family == AF_INET) {
+               cm_info.ipv4 = true;
+               cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr);
+               cm_info.loc_port = ntohs(laddr->sin_port);
+
+               if (laddr->sin_addr.s_addr != INADDR_ANY)
+                       cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr);
+               else
+                       wildcard = true;
+
+       } else {
+               cm_info.ipv4 = false;
+               i40iw_copy_ip_ntohl(cm_info.loc_addr,
+                                   laddr6->sin6_addr.in6_u.u6_addr32);
+               cm_info.loc_port = ntohs(laddr6->sin6_port);
+               if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY)
+                       i40iw_netdev_vlan_ipv6(cm_info.loc_addr,
+                                              &cm_info.vlan_id,
+                                              NULL);
+               else
+                       wildcard = true;
+       }
+       i40iw_init_mapinfo(&cm_info);
+       cm_info.backlog = backlog;
+       cm_info.cm_id = cm_id;
+
+       cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info);
+       if (!cm_listen_node) {
+               i40iw_pr_err("cm_listen_node == NULL\n");
+               return -ENOMEM;
+       }
+
+       cm_id->provider_data = cm_listen_node;
+
+       if (!cm_listen_node->reused_node) {
+               if (i40iw_create_mapinfo(&cm_info))
+                       goto error;
+               if (wildcard) {
+                       if (cm_info.ipv4)
+                               ret = i40iw_add_mqh_4(iwdev,
+                                                     &cm_info,
+                                                     cm_listen_node);
+                       else
+                               ret = i40iw_add_mqh_6(iwdev,
+                                                     &cm_info,
+                                                     cm_listen_node);
+                       if (ret)
+                               goto error;
+
+                       ret = i40iw_manage_apbvt(iwdev,
+                                                cm_info.map_loc_port,
+                                                I40IW_MANAGE_APBVT_ADD);
+
+                       if (ret)
+                               goto error;
+               } else {
+                       ret = i40iw_manage_qhash(iwdev,
+                                                &cm_info,
+                                                I40IW_QHASH_TYPE_TCP_SYN,
+                                                I40IW_QHASH_MANAGE_TYPE_ADD,
+                                                NULL,
+                                                true);
+                       if (ret)
+                               goto error;
+                       cm_listen_node->qhash_set = true;
+                       ret = i40iw_manage_apbvt(iwdev,
+                                                cm_info.map_loc_port,
+                                                I40IW_MANAGE_APBVT_ADD);
+                       if (ret)
+                               goto error;
+               }
+       }
+       cm_id->add_ref(cm_id);
+       cm_listen_node->cm_core->stats_listen_created++;
+       return 0;
+ error:
+       i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false);
+       return -EINVAL;
+}
+
+/**
+ * i40iw_destroy_listen - registered call to destroy listener
+ * @cm_id: cm information for passive connection
+ */
+int i40iw_destroy_listen(struct iw_cm_id *cm_id)
+{
+       struct i40iw_device *iwdev;
+
+       iwdev = to_iwdev(cm_id->device);
+       if (cm_id->provider_data)
+               i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true);
+       else
+               i40iw_pr_err("cm_id->provider_data was NULL\n");
+
+       cm_id->rem_ref(cm_id);
+
+       return 0;
+}
+
+/**
+ * i40iw_cm_event_connected - handle connected active node
+ * @event: the info for cm_node of connection
+ */
+static void i40iw_cm_event_connected(struct i40iw_cm_event *event)
+{
+       struct i40iw_qp *iwqp;
+       struct i40iw_device *iwdev;
+       struct i40iw_cm_node *cm_node;
+       struct i40iw_sc_dev *dev;
+       struct ib_qp_attr attr;
+       struct iw_cm_id *cm_id;
+       int status;
+       bool read0;
+
+       cm_node = event->cm_node;
+       cm_id = cm_node->cm_id;
+       iwqp = (struct i40iw_qp *)cm_id->provider_data;
+       iwdev = to_iwdev(iwqp->ibqp.device);
+       dev = &iwdev->sc_dev;
+
+       if (iwqp->destroyed) {
+               status = -ETIMEDOUT;
+               goto error;
+       }
+       i40iw_cm_init_tsa_conn(iwqp, cm_node);
+       read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO);
+       if (iwqp->page)
+               iwqp->sc_qp.qp_uk.sq_base = kmap(iwqp->page);
+       dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0);
+       if (iwqp->page)
+               kunmap(iwqp->page);
+       status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0);
+       if (status)
+               i40iw_pr_err("send cm event\n");
+
+       memset(&attr, 0, sizeof(attr));
+       attr.qp_state = IB_QPS_RTS;
+       cm_node->qhash_set = false;
+       i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL);
+
+       cm_node->accelerated = 1;
+       if (cm_node->accept_pend) {
+               if (!cm_node->listener)
+                       i40iw_pr_err("listener is null for passive node\n");
+               atomic_dec(&cm_node->listener->pend_accepts_cnt);
+               cm_node->accept_pend = 0;
+       }
+       return;
+
+error:
+       iwqp->cm_id = NULL;
+       cm_id->provider_data = NULL;
+       i40iw_send_cm_event(event->cm_node,
+                           cm_id,
+                           IW_CM_EVENT_CONNECT_REPLY,
+                           status);
+       cm_id->rem_ref(cm_id);
+       i40iw_rem_ref_cm_node(event->cm_node);
+}
+
+/**
+ * i40iw_cm_event_reset - handle reset
+ * @event: the info for cm_node of connection
+ */
+static void i40iw_cm_event_reset(struct i40iw_cm_event *event)
+{
+       struct i40iw_cm_node *cm_node = event->cm_node;
+       struct iw_cm_id   *cm_id = cm_node->cm_id;
+       struct i40iw_qp *iwqp;
+
+       if (!cm_id)
+               return;
+
+       iwqp = cm_id->provider_data;
+       if (!iwqp)
+               return;
+
+       i40iw_debug(cm_node->dev,
+                   I40IW_DEBUG_CM,
+                   "reset event %p - cm_id = %p\n",
+                    event->cm_node, cm_id);
+       iwqp->cm_id = NULL;
+
+       i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET);
+       i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0);
+}
+
+/**
+ * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer
+ * @work: pointer of cm event info.
+ */
+static void i40iw_cm_event_handler(struct work_struct *work)
+{
+       struct i40iw_cm_event *event = container_of(work,
+                                                   struct i40iw_cm_event,
+                                                   event_work);
+       struct i40iw_cm_node *cm_node;
+
+       if (!event || !event->cm_node || !event->cm_node->cm_core)
+               return;
+
+       cm_node = event->cm_node;
+
+       switch (event->type) {
+       case I40IW_CM_EVENT_MPA_REQ:
+               i40iw_send_cm_event(cm_node,
+                                   cm_node->cm_id,
+                                   IW_CM_EVENT_CONNECT_REQUEST,
+                                   0);
+               break;
+       case I40IW_CM_EVENT_RESET:
+               i40iw_cm_event_reset(event);
+               break;
+       case I40IW_CM_EVENT_CONNECTED:
+               if (!event->cm_node->cm_id ||
+                   (event->cm_node->state != I40IW_CM_STATE_OFFLOADED))
+                       break;
+               i40iw_cm_event_connected(event);
+               break;
+       case I40IW_CM_EVENT_MPA_REJECT:
+               if (!event->cm_node->cm_id ||
+                   (cm_node->state == I40IW_CM_STATE_OFFLOADED))
+                       break;
+               i40iw_send_cm_event(cm_node,
+                                   cm_node->cm_id,
+                                   IW_CM_EVENT_CONNECT_REPLY,
+                                   -ECONNREFUSED);
+               break;
+       case I40IW_CM_EVENT_ABORTED:
+               if (!event->cm_node->cm_id ||
+                   (event->cm_node->state == I40IW_CM_STATE_OFFLOADED))
+                       break;
+               i40iw_event_connect_error(event);
+               break;
+       default:
+               i40iw_pr_err("event type = %d\n", event->type);
+               break;
+       }
+
+       event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
+       i40iw_rem_ref_cm_node(event->cm_node);
+       kfree(event);
+}
+
+/**
+ * i40iw_cm_post_event - queue event request for worker thread
+ * @event: cm node's info for up event call
+ */
+static void i40iw_cm_post_event(struct i40iw_cm_event *event)
+{
+       atomic_inc(&event->cm_node->ref_count);
+       event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
+       INIT_WORK(&event->event_work, i40iw_cm_event_handler);
+
+       queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
+}
diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.h b/drivers/infiniband/hw/i40iw/i40iw_cm.h
new file mode 100644 (file)
index 0000000..5f8ceb4
--- /dev/null
@@ -0,0 +1,456 @@
+/*******************************************************************************
+*
+* Copyright (c) 2015 Intel Corporation.  All rights reserved.
+*
+* This software is available to you under a choice of one of two
+* licenses.  You may choose to be licensed under the terms of the GNU
+* General Public License (GPL) Version 2, available from the file
+* COPYING in the main directory of this source tree, or the
+* OpenFabrics.org BSD license below:
+*
+*   Redistribution and use in source and binary forms, with or
+*   without modification, are permitted provided that the following
+*   conditions are met:
+*
+*    - Redistributions of source code must retain the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer.
+*
+*    - Redistributions in binary form must reproduce the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer in the documentation and/or other materials
+*      provided with the distribution.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+*******************************************************************************/
+
+#ifndef I40IW_CM_H
+#define I40IW_CM_H
+
+#define QUEUE_EVENTS
+
+#define I40IW_MANAGE_APBVT_DEL 0
+#define I40IW_MANAGE_APBVT_ADD 1
+
+#define I40IW_MPA_REQUEST_ACCEPT  1
+#define I40IW_MPA_REQUEST_REJECT  2
+
+/* IETF MPA -- defines, enums, structs */
+#define IEFT_MPA_KEY_REQ  "MPA ID Req Frame"
+#define IEFT_MPA_KEY_REP  "MPA ID Rep Frame"
+#define IETF_MPA_KEY_SIZE 16
+#define IETF_MPA_VERSION  1
+#define IETF_MAX_PRIV_DATA_LEN 512
+#define IETF_MPA_FRAME_SIZE    20
+#define IETF_RTR_MSG_SIZE      4
+#define IETF_MPA_V2_FLAG       0x10
+#define SNDMARKER_SEQNMASK     0x000001FF
+
+#define I40IW_MAX_IETF_SIZE      32
+
+#define MPA_ZERO_PAD_LEN       4
+
+/* IETF RTR MSG Fields               */
+#define IETF_PEER_TO_PEER       0x8000
+#define IETF_FLPDU_ZERO_LEN     0x4000
+#define IETF_RDMA0_WRITE        0x8000
+#define IETF_RDMA0_READ         0x4000
+#define IETF_NO_IRD_ORD         0x3FFF
+
+/* HW-supported IRD sizes*/
+#define        I40IW_HW_IRD_SETTING_2  2
+#define        I40IW_HW_IRD_SETTING_4  4
+#define        I40IW_HW_IRD_SETTING_8  8
+#define        I40IW_HW_IRD_SETTING_16 16
+#define        I40IW_HW_IRD_SETTING_32 32
+#define        I40IW_HW_IRD_SETTING_64 64
+
+enum ietf_mpa_flags {
+       IETF_MPA_FLAGS_MARKERS = 0x80,  /* receive Markers */
+       IETF_MPA_FLAGS_CRC = 0x40,      /* receive Markers */
+       IETF_MPA_FLAGS_REJECT = 0x20,   /* Reject */
+};
+
+struct ietf_mpa_v1 {
+       u8 key[IETF_MPA_KEY_SIZE];
+       u8 flags;
+       u8 rev;
+       __be16 priv_data_len;
+       u8 priv_data[0];
+};
+
+#define ietf_mpa_req_resp_frame ietf_mpa_frame
+
+struct ietf_rtr_msg {
+       __be16 ctrl_ird;
+       __be16 ctrl_ord;
+};
+
+struct ietf_mpa_v2 {
+       u8 key[IETF_MPA_KEY_SIZE];
+       u8 flags;
+       u8 rev;
+       __be16 priv_data_len;
+       struct ietf_rtr_msg rtr_msg;
+       u8 priv_data[0];
+};
+
+struct i40iw_cm_node;
+enum i40iw_timer_type {
+       I40IW_TIMER_TYPE_SEND,
+       I40IW_TIMER_TYPE_RECV,
+       I40IW_TIMER_NODE_CLEANUP,
+       I40IW_TIMER_TYPE_CLOSE,
+};
+
+#define I40IW_PASSIVE_STATE_INDICATED    0
+#define I40IW_DO_NOT_SEND_RESET_EVENT    1
+#define I40IW_SEND_RESET_EVENT           2
+
+#define MAX_I40IW_IFS 4
+
+#define SET_ACK 0x1
+#define SET_SYN 0x2
+#define SET_FIN 0x4
+#define SET_RST 0x8
+
+#define TCP_OPTIONS_PADDING     3
+
+struct option_base {
+       u8 optionnum;
+       u8 length;
+};
+
+enum option_numbers {
+       OPTION_NUMBER_END,
+       OPTION_NUMBER_NONE,
+       OPTION_NUMBER_MSS,
+       OPTION_NUMBER_WINDOW_SCALE,
+       OPTION_NUMBER_SACK_PERM,
+       OPTION_NUMBER_SACK,
+       OPTION_NUMBER_WRITE0 = 0xbc
+};
+
+struct option_mss {
+       u8 optionnum;
+       u8 length;
+       __be16 mss;
+};
+
+struct option_windowscale {
+       u8 optionnum;
+       u8 length;
+       u8 shiftcount;
+};
+
+union all_known_options {
+       char as_end;
+       struct option_base as_base;
+       struct option_mss as_mss;
+       struct option_windowscale as_windowscale;
+};
+
+struct i40iw_timer_entry {
+       struct list_head list;
+       unsigned long timetosend;       /* jiffies */
+       struct i40iw_puda_buf *sqbuf;
+       u32 type;
+       u32 retrycount;
+       u32 retranscount;
+       u32 context;
+       u32 send_retrans;
+       int close_when_complete;
+};
+
+#define I40IW_DEFAULT_RETRYS   64
+#define I40IW_DEFAULT_RETRANS  8
+#define I40IW_DEFAULT_TTL      0x40
+#define I40IW_DEFAULT_RTT_VAR  0x6
+#define I40IW_DEFAULT_SS_THRESH 0x3FFFFFFF
+#define I40IW_DEFAULT_REXMIT_THRESH 8
+
+#define I40IW_RETRY_TIMEOUT   HZ
+#define I40IW_SHORT_TIME      10
+#define I40IW_LONG_TIME       (2 * HZ)
+#define I40IW_MAX_TIMEOUT     ((unsigned long)(12 * HZ))
+
+#define I40IW_CM_HASHTABLE_SIZE         1024
+#define I40IW_CM_TCP_TIMER_INTERVAL     3000
+#define I40IW_CM_DEFAULT_MTU            1540
+#define I40IW_CM_DEFAULT_FRAME_CNT      10
+#define I40IW_CM_THREAD_STACK_SIZE      256
+#define I40IW_CM_DEFAULT_RCV_WND        64240
+#define I40IW_CM_DEFAULT_RCV_WND_SCALED 0x3fffc
+#define I40IW_CM_DEFAULT_RCV_WND_SCALE  2
+#define I40IW_CM_DEFAULT_FREE_PKTS      0x000A
+#define I40IW_CM_FREE_PKT_LO_WATERMARK  2
+
+#define I40IW_CM_DEFAULT_MSS   536
+
+#define I40IW_CM_DEF_SEQ       0x159bf75f
+#define I40IW_CM_DEF_LOCAL_ID  0x3b47
+
+#define I40IW_CM_DEF_SEQ2      0x18ed5740
+#define I40IW_CM_DEF_LOCAL_ID2 0xb807
+#define MAX_CM_BUFFER   (I40IW_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
+
+typedef u32 i40iw_addr_t;
+
+#define i40iw_cm_tsa_context i40iw_qp_context
+
+struct i40iw_qp;
+
+/* cm node transition states */
+enum i40iw_cm_node_state {
+       I40IW_CM_STATE_UNKNOWN,
+       I40IW_CM_STATE_INITED,
+       I40IW_CM_STATE_LISTENING,
+       I40IW_CM_STATE_SYN_RCVD,
+       I40IW_CM_STATE_SYN_SENT,
+       I40IW_CM_STATE_ONE_SIDE_ESTABLISHED,
+       I40IW_CM_STATE_ESTABLISHED,
+       I40IW_CM_STATE_ACCEPTING,
+       I40IW_CM_STATE_MPAREQ_SENT,
+       I40IW_CM_STATE_MPAREQ_RCVD,
+       I40IW_CM_STATE_MPAREJ_RCVD,
+       I40IW_CM_STATE_OFFLOADED,
+       I40IW_CM_STATE_FIN_WAIT1,
+       I40IW_CM_STATE_FIN_WAIT2,
+       I40IW_CM_STATE_CLOSE_WAIT,
+       I40IW_CM_STATE_TIME_WAIT,
+       I40IW_CM_STATE_LAST_ACK,
+       I40IW_CM_STATE_CLOSING,
+       I40IW_CM_STATE_LISTENER_DESTROYED,
+       I40IW_CM_STATE_CLOSED
+};
+
+enum mpa_frame_version {
+       IETF_MPA_V1 = 1,
+       IETF_MPA_V2 = 2
+};
+
+enum mpa_frame_key {
+       MPA_KEY_REQUEST,
+       MPA_KEY_REPLY
+};
+
+enum send_rdma0 {
+       SEND_RDMA_READ_ZERO = 1,
+       SEND_RDMA_WRITE_ZERO = 2
+};
+
+enum i40iw_tcpip_pkt_type {
+       I40IW_PKT_TYPE_UNKNOWN,
+       I40IW_PKT_TYPE_SYN,
+       I40IW_PKT_TYPE_SYNACK,
+       I40IW_PKT_TYPE_ACK,
+       I40IW_PKT_TYPE_FIN,
+       I40IW_PKT_TYPE_RST
+};
+
+/* CM context params */
+struct i40iw_cm_tcp_context {
+       u8 client;
+
+       u32 loc_seq_num;
+       u32 loc_ack_num;
+       u32 rem_ack_num;
+       u32 rcv_nxt;
+
+       u32 loc_id;
+       u32 rem_id;
+
+       u32 snd_wnd;
+       u32 max_snd_wnd;
+
+       u32 rcv_wnd;
+       u32 mss;
+       u8 snd_wscale;
+       u8 rcv_wscale;
+
+       struct timeval sent_ts;
+};
+
+enum i40iw_cm_listener_state {
+       I40IW_CM_LISTENER_PASSIVE_STATE = 1,
+       I40IW_CM_LISTENER_ACTIVE_STATE = 2,
+       I40IW_CM_LISTENER_EITHER_STATE = 3
+};
+
+struct i40iw_cm_listener {
+       struct list_head list;
+       struct i40iw_cm_core *cm_core;
+       u8 loc_mac[ETH_ALEN];
+       u32 loc_addr[4];
+       u16 loc_port;
+       u32 map_loc_addr[4];
+       u16 map_loc_port;
+       struct iw_cm_id *cm_id;
+       atomic_t ref_count;
+       struct i40iw_device *iwdev;
+       atomic_t pend_accepts_cnt;
+       int backlog;
+       enum i40iw_cm_listener_state listener_state;
+       u32 reused_node;
+       u8 user_pri;
+       u16 vlan_id;
+       bool qhash_set;
+       bool ipv4;
+       struct list_head child_listen_list;
+
+};
+
+struct i40iw_kmem_info {
+       void *addr;
+       u32 size;
+};
+
+/* per connection node and node state information */
+struct i40iw_cm_node {
+       u32 loc_addr[4], rem_addr[4];
+       u16 loc_port, rem_port;
+       u32 map_loc_addr[4], map_rem_addr[4];
+       u16 map_loc_port, map_rem_port;
+       u16 vlan_id;
+       enum i40iw_cm_node_state state;
+       u8 loc_mac[ETH_ALEN];
+       u8 rem_mac[ETH_ALEN];
+       atomic_t ref_count;
+       struct i40iw_qp *iwqp;
+       struct i40iw_device *iwdev;
+       struct i40iw_sc_dev *dev;
+       struct i40iw_cm_tcp_context tcp_cntxt;
+       struct i40iw_cm_core *cm_core;
+       struct i40iw_cm_node *loopbackpartner;
+       struct i40iw_timer_entry *send_entry;
+       struct i40iw_timer_entry *close_entry;
+       spinlock_t retrans_list_lock; /* cm transmit packet */
+       enum send_rdma0 send_rdma0_op;
+       u16 ird_size;
+       u16 ord_size;
+       u16     mpav2_ird_ord;
+       struct iw_cm_id *cm_id;
+       struct list_head list;
+       int accelerated;
+       struct i40iw_cm_listener *listener;
+       int apbvt_set;
+       int accept_pend;
+       struct list_head timer_entry;
+       struct list_head reset_entry;
+       atomic_t passive_state;
+       bool qhash_set;
+       u8 user_pri;
+       bool ipv4;
+       bool snd_mark_en;
+       u16 lsmm_size;
+       enum mpa_frame_version mpa_frame_rev;
+       struct i40iw_kmem_info pdata;
+       union {
+               struct ietf_mpa_v1 mpa_frame;
+               struct ietf_mpa_v2 mpa_v2_frame;
+       };
+
+       u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
+       struct i40iw_kmem_info mpa_hdr;
+};
+
+/* structure for client or CM to fill when making CM api calls. */
+/*     - only need to set relevant data, based on op. */
+struct i40iw_cm_info {
+       struct iw_cm_id *cm_id;
+       u16 loc_port;
+       u16 rem_port;
+       u32 loc_addr[4];
+       u32 rem_addr[4];
+       u16 map_loc_port;
+       u16 map_rem_port;
+       u32 map_loc_addr[4];
+       u32 map_rem_addr[4];
+       u16 vlan_id;
+       int backlog;
+       u16 user_pri;
+       bool ipv4;
+};
+
+/* CM event codes */
+enum i40iw_cm_event_type {
+       I40IW_CM_EVENT_UNKNOWN,
+       I40IW_CM_EVENT_ESTABLISHED,
+       I40IW_CM_EVENT_MPA_REQ,
+       I40IW_CM_EVENT_MPA_CONNECT,
+       I40IW_CM_EVENT_MPA_ACCEPT,
+       I40IW_CM_EVENT_MPA_REJECT,
+       I40IW_CM_EVENT_MPA_ESTABLISHED,
+       I40IW_CM_EVENT_CONNECTED,
+       I40IW_CM_EVENT_RESET,
+       I40IW_CM_EVENT_ABORTED
+};
+
+/* event to post to CM event handler */
+struct i40iw_cm_event {
+       enum i40iw_cm_event_type type;
+       struct i40iw_cm_info cm_info;
+       struct work_struct event_work;
+       struct i40iw_cm_node *cm_node;
+};
+
+struct i40iw_cm_core {
+       struct i40iw_device *iwdev;
+       struct i40iw_sc_dev *dev;
+
+       struct list_head listen_nodes;
+       struct list_head connected_nodes;
+
+       struct timer_list tcp_timer;
+
+       struct workqueue_struct *event_wq;
+       struct workqueue_struct *disconn_wq;
+
+       spinlock_t ht_lock; /* manage hash table */
+       spinlock_t listen_list_lock; /* listen list */
+
+       u64     stats_nodes_created;
+       u64     stats_nodes_destroyed;
+       u64     stats_listen_created;
+       u64     stats_listen_destroyed;
+       u64     stats_listen_nodes_created;
+       u64     stats_listen_nodes_destroyed;
+       u64     stats_loopbacks;
+       u64     stats_accepts;
+       u64     stats_rejects;
+       u64     stats_connect_errs;
+       u64     stats_passive_errs;
+       u64     stats_pkt_retrans;
+       u64     stats_backlog_drops;
+};
+
+int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node,
+                           struct i40iw_puda_buf *sqbuf,
+                           enum i40iw_timer_type type,
+                           int send_retrans,
+                           int close_when_complete);
+
+int i40iw_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
+int i40iw_reject(struct iw_cm_id *, const void *, u8);
+int i40iw_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
+int i40iw_create_listen(struct iw_cm_id *, int);
+int i40iw_destroy_listen(struct iw_cm_id *);
+
+int i40iw_cm_start(struct i40iw_device *);
+int i40iw_cm_stop(struct i40iw_device *);
+
+int i40iw_arp_table(struct i40iw_device *iwdev,
+                   u32 *ip_addr,
+                   bool ipv4,
+                   u8 *mac_addr,
+                   u32 action);
+
+#endif /* I40IW_CM_H */