diff --git a/drivers/infiniband/hw/siw/siw_cm.c b/drivers/infiniband/hw/siw/siw_cm.c
new file mode 100644
index 0000000..46d2935
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_cm.c
@@ -0,0 +1,1947 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@zurich.ibm.com>
+ *          Fredy Neeser <nfd@zurich.ibm.com>
+ *
+ * Copyright (c) 2008-2011, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ *   - Neither the name of IBM nor the names of its contributors may be
+ *     used to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * 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/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/net.h>
+#include <linux/inetdevice.h>
+#include <linux/workqueue.h>
+#include <net/sock.h>
+#include <linux/tcp.h>
+
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+
+#include "siw.h"
+#include "siw_cm.h"
+#include "siw_obj.h"
+
+static bool mpa_crc_strict = 1;
+module_param(mpa_crc_strict, bool, 0644);
+static bool mpa_crc_required;
+module_param(mpa_crc_required, bool, 0644);
+static bool tcp_nodelay = 1;
+module_param(tcp_nodelay, bool, 0644);
+
+MODULE_PARM_DESC(mpa_crc_required, "MPA CRC required");
+MODULE_PARM_DESC(mpa_crc_strict, "MPA CRC off enforced");
+MODULE_PARM_DESC(tcp_nodelay, "Set TCP NODELAY");
+
+
+/*
+ * siw_sock_nodelay() - Disable Nagle algorithm
+ */
+static int siw_sock_nodelay(struct socket *sock)
+{
+	mm_segment_t oldfs;
+	int rv, val = 1;
+
+	if (!tcp_nodelay)
+		return 0;
+
+	oldfs = get_fs();
+
+	set_fs(KERNEL_DS);
+
+	rv = sock->ops->setsockopt(sock, SOL_TCP, TCP_NODELAY,
+				    (char __user *)&val, sizeof(val));
+	set_fs(oldfs);
+	return rv;
+}
+
+static void siw_cm_llp_state_change(struct sock *);
+static void siw_cm_llp_data_ready(struct sock *, int);
+static void siw_cm_llp_write_space(struct sock *);
+static void siw_cm_llp_error_report(struct sock *);
+
+static void siw_sk_assign_cm_upcalls(struct sock *sk)
+{
+	write_lock_bh(&sk->sk_callback_lock);
+	sk->sk_state_change = siw_cm_llp_state_change;
+	sk->sk_data_ready   = siw_cm_llp_data_ready;
+	sk->sk_write_space  = siw_cm_llp_write_space;
+	sk->sk_error_report = siw_cm_llp_error_report;
+	write_unlock_bh(&sk->sk_callback_lock);
+}
+
+static void siw_sk_save_upcalls(struct sock *sk)
+{
+	struct siw_cep *cep = sk_to_cep(sk);
+	BUG_ON(!cep);
+
+	write_lock_bh(&sk->sk_callback_lock);
+	cep->sk_state_change = sk->sk_state_change;
+	cep->sk_data_ready   = sk->sk_data_ready;
+	cep->sk_write_space  = sk->sk_write_space;
+	cep->sk_error_report = sk->sk_error_report;
+	write_unlock_bh(&sk->sk_callback_lock);
+}
+
+static void siw_sk_restore_upcalls(struct sock *sk, struct siw_cep *cep)
+{
+	sk->sk_state_change	= cep->sk_state_change;
+	sk->sk_data_ready	= cep->sk_data_ready;
+	sk->sk_write_space	= cep->sk_write_space;
+	sk->sk_error_report	= cep->sk_error_report;
+	sk->sk_user_data	= NULL;
+	sk->sk_no_check		= 0;
+}
+
+static void siw_socket_disassoc(struct socket *s)
+{
+	struct sock	*sk = s->sk;
+	struct siw_cep	*cep;
+
+	if (sk) {
+		write_lock_bh(&sk->sk_callback_lock);
+		cep = sk_to_cep(sk);
+		if (cep) {
+			siw_sk_restore_upcalls(sk, cep);
+			siw_cep_put(cep);
+		}
+		write_unlock_bh(&sk->sk_callback_lock);
+	}
+}
+
+
+static inline int kernel_peername(struct socket *s, struct sockaddr_in *addr)
+{
+	int unused;
+	return s->ops->getname(s, (struct sockaddr *)addr, &unused, 1);
+}
+
+static inline int kernel_localname(struct socket *s, struct sockaddr_in *addr)
+{
+	int unused;
+	return s->ops->getname(s, (struct sockaddr *)addr, &unused, 0);
+}
+
+static void siw_cep_socket_assoc(struct siw_cep *cep, struct socket *s)
+{
+	cep->llp.sock = s;
+	siw_cep_get(cep);
+	s->sk->sk_user_data = cep;
+
+	siw_sk_save_upcalls(s->sk);
+	siw_sk_assign_cm_upcalls(s->sk);
+}
+
+
+static struct siw_cep *siw_cep_alloc(struct siw_dev  *dev)
+{
+	struct siw_cep *cep = kzalloc(sizeof *cep, GFP_KERNEL);
+	if (cep) {
+		unsigned long flags;
+
+		INIT_LIST_HEAD(&cep->listenq);
+		INIT_LIST_HEAD(&cep->devq);
+		INIT_LIST_HEAD(&cep->work_freelist);
+
+		cep->mpa.hdr.params.m = 0;
+		cep->mpa.hdr.params.rev = MPA_REVISION_1;
+		kref_init(&cep->ref);
+		cep->state = SIW_EPSTATE_IDLE;
+		init_waitqueue_head(&cep->waitq);
+		spin_lock_init(&cep->lock);
+		cep->dev = dev;
+
+		spin_lock_irqsave(&dev->idr_lock, flags);
+		list_add_tail(&cep->devq, &dev->cep_list);
+		spin_unlock_irqrestore(&dev->idr_lock, flags);
+		atomic_inc(&dev->num_cep);
+
+		dprint(DBG_OBJ|DBG_CM, "(CEP 0x%p): New Object\n", cep);
+	}
+	return cep;
+}
+
+static void siw_cm_free_work(struct siw_cep *cep)
+{
+	struct list_head	*w, *tmp;
+	struct siw_cm_work	*work;
+
+	list_for_each_safe(w, tmp, &cep->work_freelist) {
+		work = list_entry(w, struct siw_cm_work, list);
+		list_del(&work->list);
+		kfree(work);
+	}
+}
+
+static void siw_cancel_mpatimer(struct siw_cep *cep)
+{
+	spin_lock_bh(&cep->lock);
+	if (cep->mpa_timer) {
+		if (cancel_delayed_work(&cep->mpa_timer->work)) {
+			siw_cep_put(cep);
+			kfree(cep->mpa_timer); /* not needed again */
+		}
+		cep->mpa_timer = NULL;
+	}
+	spin_unlock_bh(&cep->lock);
+}
+
+static void siw_put_work(struct siw_cm_work *work)
+{
+	INIT_LIST_HEAD(&work->list);
+	spin_lock_bh(&work->cep->lock);
+	list_add(&work->list, &work->cep->work_freelist);
+	spin_unlock_bh(&work->cep->lock);
+}
+
+static void siw_cep_set_inuse(struct siw_cep *cep)
+{
+	unsigned long flags;
+	int rv;
+retry:
+	dprint(DBG_CM, " (CEP 0x%p): use %d\n",
+		cep, cep->in_use);
+
+	spin_lock_irqsave(&cep->lock, flags);
+
+	if (cep->in_use) {
+		spin_unlock_irqrestore(&cep->lock, flags);
+		rv = wait_event_interruptible(cep->waitq, !cep->in_use);
+		if (signal_pending(current))
+			flush_signals(current);
+		goto retry;
+	} else {
+		cep->in_use = 1;
+		spin_unlock_irqrestore(&cep->lock, flags);
+	}
+}
+
+static void siw_cep_set_free(struct siw_cep *cep)
+{
+	unsigned long flags;
+
+	dprint(DBG_CM, " (CEP 0x%p): use %d\n",
+		cep, cep->in_use);
+
+	spin_lock_irqsave(&cep->lock, flags);
+	cep->in_use = 0;
+	spin_unlock_irqrestore(&cep->lock, flags);
+
+	wake_up(&cep->waitq);
+}
+
+static void siw_cm_release(struct siw_cep *cep)
+{
+	dprint(DBG_CM, " (CEP 0x%p): mpa_timer=%s, sock=0x%p, QP%d, id=0x%p\n",
+		cep, cep->mpa_timer ? "y" : "n", cep->llp.sock,
+		cep->qp ? QP_ID(cep->qp) : -1, cep->cm_id);
+
+	siw_cancel_mpatimer(cep);
+
+	if (cep->llp.sock) {
+		siw_socket_disassoc(cep->llp.sock);
+		sock_release(cep->llp.sock);
+		cep->llp.sock = NULL;
+	}
+	if (cep->qp) {
+		struct siw_qp *qp = cep->qp;
+		cep->qp = NULL;
+		siw_qp_put(qp);
+	}
+	if (cep->cm_id) {
+		cep->cm_id->rem_ref(cep->cm_id);
+		cep->cm_id = NULL;
+		siw_cep_put(cep);
+	}
+	cep->state = SIW_EPSTATE_CLOSED;
+}
+
+
+static void __siw_cep_dealloc(struct kref *ref)
+{
+	struct siw_cep *cep = container_of(ref, struct siw_cep, ref);
+	struct siw_dev *dev = cep->dev;
+	unsigned long flags;
+
+	dprint(DBG_OBJ|DBG_CM, "(CEP 0x%p): Free Object\n", cep);
+
+	WARN_ON(cep->listen_cep);
+
+	/* kfree(NULL) is save */
+	kfree(cep->mpa.pdata);
+	spin_lock_bh(&cep->lock);
+	if (!list_empty(&cep->work_freelist))
+		siw_cm_free_work(cep);
+	spin_unlock_bh(&cep->lock);
+
+	spin_lock_irqsave(&dev->idr_lock, flags);
+	list_del(&cep->devq);
+	spin_unlock_irqrestore(&dev->idr_lock, flags);
+	atomic_dec(&dev->num_cep);
+	kfree(cep);
+}
+
+static struct siw_cm_work *siw_get_work(struct siw_cep *cep)
+{
+	struct siw_cm_work	*work = NULL;
+
+	spin_lock_bh(&cep->lock);
+	if (!list_empty(&cep->work_freelist)) {
+		work = list_entry(cep->work_freelist.next, struct siw_cm_work,
+				  list);
+		list_del_init(&work->list);
+	}
+	spin_unlock_bh(&cep->lock);
+	return work;
+}
+
+static int siw_cm_alloc_work(struct siw_cep *cep, int num)
+{
+	struct siw_cm_work	*work;
+
+	BUG_ON(!list_empty(&cep->work_freelist));
+
+	while (num--) {
+		work = kmalloc(sizeof *work, GFP_KERNEL);
+		if (!work) {
+			if (!(list_empty(&cep->work_freelist)))
+				siw_cm_free_work(cep);
+			dprint(DBG_ON, " Failed\n");
+			return -ENOMEM;
+		}
+		work->cep = cep;
+		INIT_LIST_HEAD(&work->list);
+		list_add(&work->list, &cep->work_freelist);
+	}
+	return 0;
+}
+
+/*
+ * siw_cm_upcall()
+ *
+ * Upcall to IWCM to inform about async connection events
+ */
+static int siw_cm_upcall(struct siw_cep *cep, enum iw_cm_event_type reason,
+			 int status)
+{
+	struct iw_cm_event	event;
+	struct iw_cm_id		*cm_id;
+
+	memset(&event, 0, sizeof event);
+	event.status = status;
+	event.event = reason;
+
+	if (cep->mpa.hdr.params.pd_len != 0) {
+		/*
+		 * hand over MPA private data
+		 */
+		event.private_data_len = cep->mpa.hdr.params.pd_len;
+		event.private_data = cep->mpa.pdata;
+
+		cep->mpa.hdr.params.pd_len = 0;
+	}
+	if (reason == IW_CM_EVENT_CONNECT_REQUEST ||
+	    reason == IW_CM_EVENT_CONNECT_REPLY) {
+		event.local_addr = cep->llp.laddr;
+		event.remote_addr = cep->llp.raddr;
+	}
+	if (reason == IW_CM_EVENT_CONNECT_REQUEST) {
+		event.provider_data = cep;
+		cm_id = cep->listen_cep->cm_id;
+	} else
+		cm_id = cep->cm_id;
+
+	dprint(DBG_CM, " (QP%d): cep=0x%p, id=0x%p, dev(id)=%s, "
+		"reason=%d, status=%d\n",
+		cep->qp ? QP_ID(cep->qp) : -1, cep, cm_id,
+		cm_id->device->name, reason, status);
+
+	return cm_id->event_handler(cm_id, &event);
+}
+/*
+ * siw_qp_cm_drop()
+ *
+ * Drops established LLP connection if present and not already
+ * scheduled for dropping. Called from user context, SQ workqueue
+ * or receive IRQ. Caller signals if socket can be immediately
+ * closed (basically, if not in IRQ).
+ */
+void siw_qp_cm_drop(struct siw_qp *qp, int schedule)
+{
+	struct siw_cep *cep = qp->cep;
+
+	qp->rx_ctx.rx_suspend = 1;
+	qp->tx_ctx.tx_suspend = 1;
+
+	if (!qp->cep)
+		return;
+
+	if (schedule)
+		siw_cm_queue_work(cep, SIW_CM_WORK_CLOSE_LLP);
+	else {
+		siw_cep_set_inuse(cep);
+		/*
+		 * Immediately close socket
+		 */
+		dprint(DBG_CM, "(): immediate close, cep=0x%p, state=%d, "
+			"id=0x%p, sock=0x%p, QP%d\n", cep, cep->state,
+			cep->cm_id, cep->llp.sock,
+			cep->qp ? QP_ID(cep->qp) : -1);
+
+		if (cep->cm_id) {
+			switch (cep->state) {
+
+			case SIW_EPSTATE_AWAIT_MPAREP:
+				siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY,
+					      -EINVAL);
+				break;
+
+			case SIW_EPSTATE_RDMA_MODE:
+				siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0);
+
+				break;
+
+			case SIW_EPSTATE_IDLE:
+			case SIW_EPSTATE_LISTENING:
+			case SIW_EPSTATE_CONNECTING:
+			case SIW_EPSTATE_AWAIT_MPAREQ:
+			case SIW_EPSTATE_RECVD_MPAREQ:
+			case SIW_EPSTATE_CLOSED:
+			default:
+
+				break;
+			}
+			cep->cm_id->rem_ref(cep->cm_id);
+			cep->cm_id = NULL;
+			siw_cep_put(cep);
+		}
+		cep->state = SIW_EPSTATE_CLOSED;
+
+		if (cep->llp.sock) {
+			siw_socket_disassoc(cep->llp.sock);
+			sock_release(cep->llp.sock);
+			cep->llp.sock = NULL;
+		}
+		if (cep->qp) {
+			cep->qp = NULL;
+			siw_qp_put(qp);
+		}
+		siw_cep_set_free(cep);
+	}
+}
+
+
+void siw_cep_put(struct siw_cep *cep)
+{
+	dprint(DBG_OBJ|DBG_CM, "(CEP 0x%p): New refcount: %d\n",
+		cep, atomic_read(&cep->ref.refcount) - 1);
+
+	BUG_ON(atomic_read(&cep->ref.refcount) < 1);
+	kref_put(&cep->ref, __siw_cep_dealloc);
+}
+
+void siw_cep_get(struct siw_cep *cep)
+{
+	kref_get(&cep->ref);
+	dprint(DBG_OBJ|DBG_CM, "(CEP 0x%p): New refcount: %d\n",
+		cep, atomic_read(&cep->ref.refcount));
+}
+
+
+
+static inline int ksock_recv(struct socket *sock, char *buf, size_t size,
+			     int flags)
+{
+	struct kvec iov = {buf, size};
+	struct msghdr msg = {.msg_name = NULL, .msg_flags = flags};
+
+	return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);
+}
+
+/*
+ * Expects params->pd_len in host byte order
+ *
+ * TODO: We might want to combine the arguments params and pdata to a single
+ * pointer to a struct siw_mpa_info as defined in siw_cm.h.
+ * This way, all private data parameters would be in a common struct.
+ */
+static int siw_send_mpareqrep(struct socket *s, struct mpa_rr_params *params,
+			      char *key, const void *pdata)
+{
+	struct mpa_rr	hdr;
+	struct kvec	iov[2];
+	struct msghdr	msg;
+
+	int		rv;
+	unsigned short	pd_len = params->pd_len;
+
+	memset(&msg, 0, sizeof(msg));
+	memset(&hdr, 0, sizeof hdr);
+	memcpy(hdr.key, key, 16);
+
+	/*
+	 * TODO: By adding a union to struct mpa_rr_params, it should be
+	 * possible to replace the next 4 statements by one
+	 */
+	hdr.params.r = params->r;
+	hdr.params.c = params->c;
+	hdr.params.m = params->m;
+	hdr.params.rev = params->rev;
+
+	if (pd_len > MPA_MAX_PRIVDATA)
+		return -EINVAL;
+
+	hdr.params.pd_len = htons(pd_len);
+
+	iov[0].iov_base = &hdr;
+	iov[0].iov_len = sizeof hdr;
+
+	if (pd_len) {
+		iov[1].iov_base = (char *)pdata;
+		iov[1].iov_len = pd_len;
+
+		rv =  kernel_sendmsg(s, &msg, iov, 2, pd_len + sizeof hdr);
+	} else
+		rv =  kernel_sendmsg(s, &msg, iov, 1, sizeof hdr);
+
+	return rv < 0 ? rv : 0;
+}
+
+/*
+ * Receive MPA Request/Reply heder.
+ *
+ * Returns 0 if complete MPA Request/Reply haeder including
+ * eventual private data was received. Returns -EAGAIN if
+ * header was partially received or negative error code otherwise.
+ *
+ * Context: May be called in process context only
+ */
+static int siw_recv_mpa_rr(struct siw_cep *cep)
+{
+	struct mpa_rr	*hdr = &cep->mpa.hdr;
+	struct socket	*s = cep->llp.sock;
+	int		rcvd, to_rcv;
+
+	if (cep->mpa.bytes_rcvd < sizeof(struct mpa_rr)) {
+
+		rcvd = ksock_recv(s, (char *)hdr + cep->mpa.bytes_rcvd,
+				  sizeof(struct mpa_rr) -
+				  cep->mpa.bytes_rcvd, 0);
+
+		if (rcvd <= 0)
+			return -ECONNABORTED;
+
+		cep->mpa.bytes_rcvd += rcvd;
+
+		if (cep->mpa.bytes_rcvd < sizeof(struct mpa_rr))
+			return -EAGAIN;
+
+		hdr->params.pd_len = ntohs(hdr->params.pd_len);
+
+		if (hdr->params.pd_len > MPA_MAX_PRIVDATA)
+			return -EPROTO;
+	}
+
+	/*
+	 * At least the MPA Request/Reply header (frame not including
+	 * private data) has been received.
+	 * Receive (or continue receiving) any private data.
+	 */
+	to_rcv = hdr->params.pd_len -
+		 (cep->mpa.bytes_rcvd - sizeof(struct mpa_rr));
+
+	if (!to_rcv) {
+		/*
+		 * We must have hdr->params.pd_len == 0 and thus received a
+		 * complete MPA Request/Reply frame.
+		 * Check against peer protocol violation.
+		 */
+		__u32 word;
+
+		rcvd = ksock_recv(s, (char *)&word, sizeof word, MSG_DONTWAIT);
+		if (rcvd == -EAGAIN)
+			return 0;
+
+		if (rcvd == 0) {
+			dprint(DBG_CM, " peer EOF\n");
+			return -EPIPE;
+		}
+		if (rcvd < 0) {
+			dprint(DBG_CM, " ERROR: %d:\n", rcvd);
+			return rcvd;
+		}
+		dprint(DBG_CM, " peer sent extra data: %d\n", rcvd);
+		return -EPROTO;
+	}
+
+	/*
+	 * At this point, we must have hdr->params.pd_len != 0.
+	 * A private data buffer gets allocated if hdr->params.pd_len != 0.
+	 */
+	if (!cep->mpa.pdata) {
+		cep->mpa.pdata = kmalloc(hdr->params.pd_len + 4, GFP_KERNEL);
+		if (!cep->mpa.pdata)
+			return -ENOMEM;
+	}
+	rcvd = ksock_recv(s, cep->mpa.pdata + cep->mpa.bytes_rcvd
+			  - sizeof(struct mpa_rr), to_rcv + 4, MSG_DONTWAIT);
+
+	if (rcvd < 0)
+		return rcvd;
+
+	if (rcvd > to_rcv)
+		return -EPROTO;
+
+	cep->mpa.bytes_rcvd += rcvd;
+
+	if (to_rcv == rcvd) {
+		dprint(DBG_CM, " %d bytes private_data received\n",
+			hdr->params.pd_len);
+		return 0;
+	}
+	return -EAGAIN;
+}
+
+
+/*
+ * siw_proc_mpareq()
+ *
+ * Read MPA Request from socket and signal new connection to IWCM
+ * if success. Caller must hold lock on corresponding listening CEP.
+ */
+static int siw_proc_mpareq(struct siw_cep *cep)
+{
+	int rv = siw_recv_mpa_rr(cep);
+	if (rv != -EAGAIN)
+		siw_cancel_mpatimer(cep);
+	if (rv)
+		goto out;
+
+	if (cep->mpa.hdr.params.rev > MPA_REVISION_1) {
+		/* allow for 0 and 1 only */
+		rv = -EPROTO;
+		goto out;
+	}
+
+	if (memcmp(cep->mpa.hdr.key, MPA_KEY_REQ, sizeof cep->mpa.hdr.key)) {
+		rv = -EPROTO;
+		goto out;
+	}
+
+	if (cep->mpa.hdr.params.m ||
+	    (cep->mpa.hdr.params.c && !mpa_crc_required && mpa_crc_strict)) {
+		/*
+		 * MPA Markers: currently not supported. Marker TX to be added.
+		 *
+		 * CRC:
+		 *    RFC 5044, page 27: CRC MUST be used if peer requests it.
+		 *    siw specific: 'mpa_crc_strict' parameter to reject
+		 *    connection with CRC if local CRC off enforced by
+		 *    'mpa_crc_strict' module parameter.
+		 */
+		dprint(DBG_CM|DBG_ON, " Reject: CRC %d:%d:%d, M %d:%d\n",
+			cep->mpa.hdr.params.c, mpa_crc_required,
+			mpa_crc_strict, cep->mpa.hdr.params.m, 0);
+
+		cep->mpa.hdr.params.m = 0;
+		cep->mpa.hdr.params.r = 1; /* reject */
+
+		if (!mpa_crc_required && mpa_crc_strict)
+			cep->mpa.hdr.params.c = 0;
+
+		cep->mpa.hdr.params.pd_len = 0;
+		kfree(cep->mpa.pdata);
+		cep->mpa.pdata = NULL;
+
+		(void)siw_send_mpareqrep(cep->llp.sock, &cep->mpa.hdr.params,
+					 MPA_KEY_REP, NULL);
+		rv = -EOPNOTSUPP;
+		goto out;
+	}
+	/*
+	 * Enable CRC if requested by module initialization
+	 */
+	if (!cep->mpa.hdr.params.c && mpa_crc_required)
+		cep->mpa.hdr.params.c = 1;
+
+	cep->state = SIW_EPSTATE_RECVD_MPAREQ;
+
+	/* Keep reference until IWCM accepts/rejects */
+	siw_cep_get(cep);
+	rv = siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REQUEST, 0);
+	if (rv)
+		siw_cep_put(cep);
+out:
+	return rv;
+}
+
+
+static int siw_proc_mpareply(struct siw_cep *cep)
+{
+	struct siw_qp_attrs	qp_attrs;
+	struct siw_qp		*qp = cep->qp;
+	int			rv;
+
+	rv = siw_recv_mpa_rr(cep);
+	if (rv != -EAGAIN)
+		siw_cancel_mpatimer(cep);
+	if (rv)
+		goto out_err;
+
+	if (cep->mpa.hdr.params.rev > MPA_REVISION_1) {
+		/* allow for 0 and 1 only */
+		rv = -EPROTO;
+		goto out_err;
+	}
+	if (memcmp(cep->mpa.hdr.key, MPA_KEY_REP, sizeof cep->mpa.hdr.key)) {
+		rv = -EPROTO;
+		goto out_err;
+	}
+	if (cep->mpa.hdr.params.r) {
+		dprint(DBG_CM, "(cep=0x%p): Got MPA reject\n", cep);
+		(void)siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY,
+				    -ECONNRESET);
+
+		rv = -ECONNRESET;
+		goto out;
+	}
+	if ((cep->mpa.hdr.params.m == 1) ||
+	    (mpa_crc_required && !cep->mpa.hdr.params.c) ||
+	    (mpa_crc_strict && !mpa_crc_required && cep->mpa.hdr.params.c)) {
+
+		dprint(DBG_CM|DBG_ON, " Reply unsupp: CRC %d:%d:%d, M %d:%d\n",
+			cep->mpa.hdr.params.c, mpa_crc_required,
+			mpa_crc_strict, cep->mpa.hdr.params.m, 0);
+
+		(void)siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY,
+				    -ECONNREFUSED);
+		rv = -EINVAL;
+		goto out;
+	}
+	memset(&qp_attrs, 0, sizeof qp_attrs);
+	qp_attrs.mpa.marker_rcv = 0;
+	qp_attrs.mpa.marker_snd = 0;
+	qp_attrs.mpa.crc = cep->mpa.hdr.params.c;
+	qp_attrs.ird = cep->ird;
+	qp_attrs.ord = cep->ord;
+	qp_attrs.llp_stream_handle = cep->llp.sock;
+	qp_attrs.state = SIW_QP_STATE_RTS;
+
+	/* Move socket RX/TX under QP control */
+	down_write(&qp->state_lock);
+	if (qp->attrs.state > SIW_QP_STATE_RTR) {
+		rv = -EINVAL;
+		up_write(&qp->state_lock);
+		goto out_err;
+	}
+	rv = siw_qp_modify(qp, &qp_attrs, SIW_QP_ATTR_STATE|
+					       SIW_QP_ATTR_LLP_HANDLE|
+					       SIW_QP_ATTR_ORD|
+					       SIW_QP_ATTR_IRD|
+					       SIW_QP_ATTR_MPA);
+
+	up_write(&qp->state_lock);
+
+	if (!rv) {
+		rv = siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, 0);
+		if (!rv)
+			cep->state = SIW_EPSTATE_RDMA_MODE;
+
+		goto out;
+	}
+
+out_err:
+	(void)siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, -EINVAL);
+out:
+	return rv;
+}
+
+/*
+ * siw_accept_newconn - accept an incoming pending connection
+ *
+ */
+static void siw_accept_newconn(struct siw_cep *cep)
+{
+	struct socket		*s = cep->llp.sock;
+	struct socket		*new_s = NULL;
+	struct siw_cep		*new_cep = NULL;
+	int			rv = 0; /* debug only. should disappear */
+
+	if (cep->state != SIW_EPSTATE_LISTENING)
+		goto error;
+
+	new_cep = siw_cep_alloc(cep->dev);
+	if (!new_cep)
+		goto error;
+
+	if (siw_cm_alloc_work(new_cep, 4) != 0)
+		goto error;
+
+	/*
+	 * Copy saved socket callbacks from listening CEP
+	 * and assign new socket with new CEP
+	 */
+	new_cep->sk_state_change = cep->sk_state_change;
+	new_cep->sk_data_ready   = cep->sk_data_ready;
+	new_cep->sk_write_space  = cep->sk_write_space;
+	new_cep->sk_error_report = cep->sk_error_report;
+
+	rv = kernel_accept(s, &new_s, O_NONBLOCK);
+	if (rv != 0) {
+		/*
+		 * TODO: Already aborted by peer?
+		 * Is there anything we should do?
+		 */
+		dprint(DBG_CM|DBG_ON, "(cep=0x%p): ERROR: "
+			"kernel_accept(): rv=%d\n", cep, rv);
+		goto error;
+	}
+	new_cep->llp.sock = new_s;
+	siw_cep_get(new_cep);
+	new_s->sk->sk_user_data = new_cep;
+
+	dprint(DBG_CM, "(cep=0x%p, s=0x%p, new_s=0x%p): "
+		"New LLP connection accepted\n", cep, s, new_s);
+
+	rv = siw_sock_nodelay(new_s);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(cep=0x%p): ERROR: "
+			"siw_sock_nodelay(): rv=%d\n", cep, rv);
+		goto error;
+	}
+
+	rv = kernel_peername(new_s, &new_cep->llp.raddr);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(cep=0x%p): ERROR: "
+			"kernel_peername(): rv=%d\n", cep, rv);
+		goto error;
+	}
+	rv = kernel_localname(new_s, &new_cep->llp.laddr);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(cep=0x%p): ERROR: "
+			"kernel_localname(): rv=%d\n", cep, rv);
+		goto error;
+	}
+
+	new_cep->state = SIW_EPSTATE_AWAIT_MPAREQ;
+
+	rv = siw_cm_queue_work(new_cep, SIW_CM_WORK_MPATIMEOUT);
+	if (rv)
+		goto error;
+	/*
+	 * See siw_proc_mpareq() etc. for the use of new_cep->listen_cep.
+	 */
+	new_cep->listen_cep = cep;
+	siw_cep_get(cep);
+
+	if (atomic_read(&new_s->sk->sk_rmem_alloc)) {
+		/*
+		 * MPA REQ already queued
+		 */
+		dprint(DBG_CM, "(cep=0x%p): Immediate MPA req.\n", cep);
+
+		siw_cep_set_inuse(new_cep);
+		rv = siw_proc_mpareq(new_cep);
+		siw_cep_set_free(new_cep);
+
+		if (rv != -EAGAIN) {
+			siw_cep_put(cep);
+			new_cep->listen_cep = NULL;
+			if (rv)
+				goto error;
+		}
+	}
+	return;
+
+error:
+	if (new_cep)
+		siw_cep_put(new_cep);
+
+	if (new_s) {
+		siw_socket_disassoc(new_s);
+		sock_release(new_s);
+	}
+	dprint(DBG_CM|DBG_ON, "(cep=0x%p): ERROR: rv=%d\n", cep, rv);
+}
+
+
+static void siw_cm_work_handler(struct work_struct *w)
+{
+	struct siw_cm_work	*work;
+	struct siw_cep		*cep;
+	int rv = 0;
+
+	work = container_of(w, struct siw_cm_work, work.work);
+	cep = work->cep;
+
+	dprint(DBG_CM, " (QP%d): WORK type: %d, CEP: 0x%p, state: %d\n",
+		cep->qp ? QP_ID(cep->qp) : -1, work->type, cep, cep->state);
+
+	siw_cep_set_inuse(cep);
+
+	switch (work->type) {
+
+	case SIW_CM_WORK_ACCEPT:
+
+		siw_accept_newconn(cep);
+		break;
+
+	case SIW_CM_WORK_READ_MPAHDR:
+
+		switch (cep->state) {
+
+		case SIW_EPSTATE_AWAIT_MPAREQ:
+
+			if (cep->listen_cep) {
+				siw_cep_set_inuse(cep->listen_cep);
+
+				if (cep->listen_cep->state ==
+				    SIW_EPSTATE_LISTENING)
+					rv = siw_proc_mpareq(cep);
+				else
+					rv = -EFAULT;
+
+				siw_cep_set_free(cep->listen_cep);
+
+				if (rv != -EAGAIN) {
+					siw_cep_put(cep->listen_cep);
+					cep->listen_cep = NULL;
+					if (rv)
+						siw_cep_put(cep);
+				}
+			}
+			break;
+
+		case SIW_EPSTATE_AWAIT_MPAREP:
+
+			rv = siw_proc_mpareply(cep);
+			break;
+
+		default:
+			/*
+			 * CEP already moved out of MPA handshake.
+			 * any connection management already done.
+			 * silently ignore the mpa packet.
+			 */
+			dprint(DBG_CM, "(): CEP not in MPA "
+				"handshake state: %d\n", cep->state);
+		}
+		if (rv && rv != EAGAIN)
+			siw_cm_release(cep);
+
+		break;
+
+	case SIW_CM_WORK_CLOSE_LLP:
+		/*
+		 * QP scheduled LLP close
+		 */
+		dprint(DBG_CM, "(): SIW_CM_WORK_CLOSE_LLP, cep->state=%d\n",
+			cep->state);
+
+		if (cep->cm_id)
+			siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0);
+
+		siw_cm_release(cep);
+
+		break;
+
+	case SIW_CM_WORK_PEER_CLOSE:
+
+		dprint(DBG_CM, "(): SIW_CM_WORK_PEER_CLOSE, "
+			"cep->state=%d\n", cep->state);
+
+		if (cep->cm_id) {
+			switch (cep->state) {
+
+			case SIW_EPSTATE_AWAIT_MPAREP:
+				/*
+				 * MPA reply not received, but connection drop
+				 */
+				siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY,
+					      -ECONNRESET);
+				break;
+
+			case SIW_EPSTATE_RDMA_MODE:
+				/*
+				 * NOTE: IW_CM_EVENT_DISCONNECT is given just
+				 *       to transition IWCM into CLOSING.
+				 *       FIXME: is that needed?
+				 */
+				siw_cm_upcall(cep, IW_CM_EVENT_DISCONNECT, 0);
+				siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0);
+
+				break;
+
+			default:
+
+				break;
+				/*
+				 * for these states there is no connection
+				 * known to the IWCM.
+				 */
+			}
+		} else {
+			switch (cep->state) {
+
+			case SIW_EPSTATE_RECVD_MPAREQ:
+				/*
+				 * Wait for the CM to call its accept/reject
+				 */
+				dprint(DBG_CM, "(): STATE_RECVD_MPAREQ: "
+					"wait for CM:\n");
+				break;
+			case SIW_EPSTATE_AWAIT_MPAREQ:
+				/*
+				 * Socket close before MPA request received.
+				 */
+				dprint(DBG_CM,
+					"(): STATE_AWAIT_MPAREQ: "
+					"unlink from Listener\n");
+				siw_cep_put(cep->listen_cep);
+				cep->listen_cep = NULL;
+
+				break;
+
+			default:
+				break;
+			}
+		}
+		siw_cm_release(cep);
+
+		break;
+
+	case SIW_CM_WORK_MPATIMEOUT:
+
+		cep->mpa_timer = NULL;
+
+		if (cep->state == SIW_EPSTATE_AWAIT_MPAREP) {
+			/*
+			 * MPA request timed out:
+			 * Hide any partially received private data and signal
+			 * timeout
+			 */
+			cep->mpa.hdr.params.pd_len = 0;
+
+			if (cep->cm_id)
+				siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY,
+					      -ETIMEDOUT);
+			siw_cm_release(cep);
+
+		} else if (cep->state == SIW_EPSTATE_AWAIT_MPAREQ) {
+			/*
+			 * No MPA request received after peer TCP stream setup.
+			 */
+			siw_cep_put(cep->listen_cep);
+			cep->listen_cep = NULL;
+			siw_cm_release(cep);
+		}
+		break;
+
+	default:
+		BUG();
+	}
+
+	siw_cep_set_free(cep);
+
+	dprint(DBG_CM, " (Exit): WORK type: %d, CEP: 0x%p\n", work->type, cep);
+	siw_put_work(work);
+	siw_cep_put(cep);
+}
+
+static struct workqueue_struct *siw_cm_wq;
+
+int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type)
+{
+	struct siw_cm_work *work = siw_get_work(cep);
+
+	dprint(DBG_CM, " (QP%d): WORK type: %d, CEP: 0x%p\n",
+		cep->qp ? QP_ID(cep->qp) : -1, type, cep);
+
+	if (!work) {
+		dprint(DBG_ON, " Failed\n");
+		return -ENOMEM;
+	}
+	work->type = type;
+	work->cep = cep;
+
+	siw_cep_get(cep);
+
+	INIT_DELAYED_WORK(&work->work, siw_cm_work_handler);
+
+	if (type == SIW_CM_WORK_MPATIMEOUT) {
+		unsigned long delay;
+		if (cep->state == SIW_EPSTATE_AWAIT_MPAREQ)
+			delay = MPAREQ_TIMEOUT;
+		else
+			delay = MPAREP_TIMEOUT;
+		cep->mpa_timer = work;
+		queue_delayed_work(siw_cm_wq, &work->work, delay);
+	} else
+		queue_delayed_work(siw_cm_wq, &work->work, 0);
+
+	return 0;
+}
+
+
+static void siw_cm_llp_data_ready(struct sock *sk, int flags)
+{
+	struct siw_cep	*cep;
+
+	read_lock(&sk->sk_callback_lock);
+
+	cep = sk_to_cep(sk);
+	if (!cep) {
+		WARN_ON(1);
+		goto out;
+	}
+
+	dprint(DBG_CM, "(): cep 0x%p, state: %d, flags %x\n", cep,
+		cep->state, flags);
+
+	switch (cep->state) {
+
+	case SIW_EPSTATE_RDMA_MODE:
+	case SIW_EPSTATE_LISTENING:
+
+		break;
+
+	case SIW_EPSTATE_AWAIT_MPAREQ:
+	case SIW_EPSTATE_AWAIT_MPAREP:
+
+		siw_cm_queue_work(cep, SIW_CM_WORK_READ_MPAHDR);
+		break;
+
+	default:
+		dprint(DBG_CM, "(): Unexpected DATA, state %d\n", cep->state);
+		break;
+	}
+out:
+	read_unlock(&sk->sk_callback_lock);
+}
+
+static void siw_cm_llp_write_space(struct sock *sk)
+{
+	struct siw_cep	*cep = sk_to_cep(sk);
+
+	if (cep)
+		dprint(DBG_CM, "(): cep: 0x%p, state: %d\n", cep, cep->state);
+}
+
+static void siw_cm_llp_error_report(struct sock *sk)
+{
+	struct siw_cep	*cep = sk_to_cep(sk);
+
+	dprint(DBG_CM, "(): error: %d, state: %d\n", sk->sk_err, sk->sk_state);
+
+	if (cep) {
+		cep->sk_error = sk->sk_err;
+		dprint(DBG_CM, "(): cep->state: %d\n", cep->state);
+		cep->sk_error_report(sk);
+	}
+}
+
+static void siw_cm_llp_state_change(struct sock *sk)
+{
+	struct siw_cep	*cep;
+	struct socket	*s;
+	void (*orig_state_change)(struct sock *);
+
+
+	read_lock(&sk->sk_callback_lock);
+
+	cep = sk_to_cep(sk);
+	if (!cep) {
+		WARN_ON(1);
+		read_unlock(&sk->sk_callback_lock);
+		return;
+	}
+	orig_state_change = cep->sk_state_change;
+
+	s = sk->sk_socket;
+
+	dprint(DBG_CM, "(): cep: 0x%p, state: %d\n", cep, cep->state);
+
+	switch (sk->sk_state) {
+
+	case TCP_ESTABLISHED:
+		/*
+		 * handle accepting socket as special case where only
+		 * new connection is possible
+		 */
+		siw_cm_queue_work(cep, SIW_CM_WORK_ACCEPT);
+
+		break;
+
+	case TCP_CLOSE:
+	case TCP_CLOSE_WAIT:
+
+		if (cep->qp)
+			cep->qp->tx_ctx.tx_suspend = 1;
+		siw_cm_queue_work(cep, SIW_CM_WORK_PEER_CLOSE);
+
+		break;
+
+	default:
+		dprint(DBG_CM, "Unexpected sock state %d\n", sk->sk_state);
+	}
+	read_unlock(&sk->sk_callback_lock);
+	orig_state_change(sk);
+}
+
+
+static int kernel_bindconnect(struct socket *s,
+			      struct sockaddr *laddr, int laddrlen,
+			      struct sockaddr *raddr, int raddrlen, int flags)
+{
+	int err, s_val = 1;
+	/*
+	 * XXX
+	 * Tentative fix. Should not be needed but sometimes iwcm
+	 * chooses ports in use
+	 */
+	err = kernel_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&s_val,
+				sizeof s_val);
+	if (err < 0)
+		goto done;
+
+	err = s->ops->bind(s, laddr, laddrlen);
+	if (err < 0)
+		goto done;
+
+	err = s->ops->connect(s, raddr, raddrlen, flags);
+	if (err < 0)
+		goto done;
+
+	err = s->ops->getname(s, laddr, &s_val, 0);
+
+done:
+	return err;
+}
+
+
+int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *params)
+{
+	struct siw_dev	*dev = siw_dev_ofa2siw(id->device);
+	struct siw_qp	*qp;
+	struct siw_cep	*cep = NULL;
+	struct socket	*s = NULL;
+	struct sockaddr	*laddr, *raddr;
+
+	u16		pd_len = params->private_data_len;
+	int		rv, size;
+
+	if (pd_len > MPA_MAX_PRIVDATA)
+		return -EINVAL;
+
+	qp = siw_qp_id2obj(dev, params->qpn);
+	BUG_ON(!qp);
+
+	dprint(DBG_CM, "(id=0x%p, QP%d): dev(id)=%s, l2dev=%s\n",
+		id, QP_ID(qp), dev->ofa_dev.name, dev->l2dev->name);
+	dprint(DBG_CM, "(id=0x%p, QP%d): laddr=(0x%x,%d), raddr=(0x%x,%d)\n",
+		id, QP_ID(qp),
+		ntohl(id->local_addr.sin_addr.s_addr),
+		ntohs(id->local_addr.sin_port),
+		ntohl(id->remote_addr.sin_addr.s_addr),
+		ntohs(id->remote_addr.sin_port));
+
+	laddr = (struct sockaddr *)&id->local_addr;
+	raddr = (struct sockaddr *)&id->remote_addr;
+
+	rv = sock_create(AF_INET, SOCK_STREAM, IPPROTO_TCP, &s);
+	if (rv < 0)
+		goto error;
+
+	size = SOCKBUFSIZE;
+	rv = kernel_setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&size,
+			       sizeof size);
+	if (rv < 0)
+		goto error;
+
+	rv = kernel_setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&size,
+			       sizeof size);
+	if (rv < 0)
+		goto error;
+
+	/*
+	 * NOTE: For simplification, connect() is called in blocking
+	 * mode. Might be reconsidered for async connection setup at
+	 * TCP level.
+	 */
+	rv = kernel_bindconnect(s, laddr, sizeof *laddr, raddr,
+				sizeof *raddr, 0);
+	if (rv != 0) {
+		dprint(DBG_CM, "(id=0x%p, QP%d): kernel_bindconnect: rv=%d\n",
+			id, QP_ID(qp), rv);
+		goto error;
+	}
+	rv = siw_sock_nodelay(s);
+	if (rv != 0) {
+		dprint(DBG_CM, "(id=0x%p, QP%d): siw_sock_nodelay(): rv=%d\n",
+			id, QP_ID(qp), rv);
+		goto error;
+	}
+	cep = siw_cep_alloc(dev);
+	if (!cep) {
+		rv =  -ENOMEM;
+		goto error;
+	}
+	siw_cep_set_inuse(cep);
+
+	/* Associate QP with CEP */
+	siw_cep_get(cep);
+	qp->cep = cep;
+
+	/* siw_qp_get(qp) already done by QP lookup */
+	cep->qp = qp;
+
+	id->add_ref(id);
+	cep->cm_id = id;
+
+	rv = siw_cm_alloc_work(cep, 4);
+	if (rv != 0) {
+		rv = -ENOMEM;
+		goto error;
+	}
+
+	cep->mpa.hdr.params.c = mpa_crc_required ? 1 : 0;
+	cep->mpa.hdr.params.pd_len = pd_len;
+	cep->ird = params->ird;
+	cep->ord = params->ord;
+	cep->state = SIW_EPSTATE_CONNECTING;
+
+	dprint(DBG_CM, " (id=0x%p, QP%d): pd_len = %u\n",
+		id, QP_ID(qp), pd_len);
+
+	rv = kernel_peername(s, &cep->llp.raddr);
+	if (rv)
+		goto error;
+
+	rv = kernel_localname(s, &cep->llp.laddr);
+	if (rv)
+		goto error;
+
+	/*
+	 * Associate CEP with socket
+	 */
+	siw_cep_socket_assoc(cep, s);
+
+	cep->state = SIW_EPSTATE_AWAIT_MPAREP;
+
+	rv = siw_send_mpareqrep(cep->llp.sock, &cep->mpa.hdr.params,
+				MPA_KEY_REQ, (char *)params->private_data);
+	/*
+	 * Reset private data.
+	 */
+	kfree(cep->mpa.pdata);
+	cep->mpa.pdata = NULL;
+	cep->mpa.hdr.params.pd_len = 0;
+
+	if (rv >= 0) {
+		rv = siw_cm_queue_work(cep, SIW_CM_WORK_MPATIMEOUT);
+		if (!rv) {
+			dprint(DBG_CM, "(id=0x%p, cep=0x%p QP%d): Exit\n",
+				id, cep, QP_ID(qp));
+			siw_cep_set_free(cep);
+			return 0;
+		}
+	}
+error:
+	dprint(DBG_CM, " Failed: %d\n", rv);
+
+	if (cep) {
+		siw_socket_disassoc(s);
+		sock_release(s);
+		cep->llp.sock = NULL;
+
+		cep->qp = NULL;
+
+		cep->cm_id = NULL;
+		id->rem_ref(id);
+		siw_cep_put(cep);
+
+		qp->cep = NULL;
+		siw_cep_put(cep);
+
+		cep->state = SIW_EPSTATE_CLOSED;
+
+		siw_cep_set_free(cep);
+
+		siw_cep_put(cep);
+
+	} else if (s)
+		sock_release(s);
+
+	siw_qp_put(qp);
+
+	return rv;
+}
+
+/*
+ * siw_accept - Let SoftiWARP accept an RDMA connection request
+ *
+ * @id:		New connection management id to be used for accepted
+ *		connection request
+ * @params:	Connection parameters provided by ULP for accepting connection
+ *
+ * Transition QP to RTS state, associate new CM id @id with accepted CEP
+ * and get prepared for TCP input by installing socket callbacks.
+ * Then send MPA Reply and generate the "connection established" event.
+ * Socket callbacks must be installed before sending MPA Reply, because
+ * the latter may cause a first RDMA message to arrive from the RDMA Initiator
+ * side very quickly, at which time the socket callbacks must be ready.
+ */
+int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *params)
+{
+	struct siw_dev		*dev = siw_dev_ofa2siw(id->device);
+	struct siw_cep		*cep = (struct siw_cep *)id->provider_data;
+	struct siw_qp		*qp;
+	struct siw_qp_attrs	qp_attrs;
+	char			*pdata = NULL;
+	int rv;
+
+	siw_cep_set_inuse(cep);
+	siw_cep_put(cep);
+
+	if (cep->state != SIW_EPSTATE_RECVD_MPAREQ) {
+		if (cep->state == SIW_EPSTATE_CLOSED) {
+
+			dprint(DBG_CM, "(id=0x%p): Out of State\n", id);
+
+			siw_cep_set_free(cep);
+			siw_cep_put(cep);
+
+			return -ECONNRESET;
+		}
+		BUG();
+	}
+
+	qp = siw_qp_id2obj(dev, params->qpn);
+	BUG_ON(!qp); /* The OFA core should prevent this */
+
+	down_write(&qp->state_lock);
+	if (qp->attrs.state > SIW_QP_STATE_RTR) {
+		rv = -EINVAL;
+		up_write(&qp->state_lock);
+		goto error;
+	}
+
+	dprint(DBG_CM, "(id=0x%p, QP%d): dev(id)=%s\n",
+		id, QP_ID(qp), dev->ofa_dev.name);
+
+	if (params->ord > dev->attrs.max_ord ||
+	    params->ird > dev->attrs.max_ord) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p, QP%d): "
+			"ORD: %d (max: %d), IRD: %d (max: %d)\n",
+			id, QP_ID(qp),
+			params->ord, qp->attrs.ord,
+			params->ird, qp->attrs.ird);
+		rv = -EINVAL;
+		up_write(&qp->state_lock);
+		goto error;
+	}
+	if (params->private_data_len > MPA_MAX_PRIVDATA) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p, QP%d): "
+			"Private data too long: %d (max: %d)\n",
+			id, QP_ID(qp),
+			params->private_data_len, MPA_MAX_PRIVDATA);
+		rv =  -EINVAL;
+		up_write(&qp->state_lock);
+		goto error;
+	}
+	cep->cm_id = id;
+	id->add_ref(id);
+
+	memset(&qp_attrs, 0, sizeof qp_attrs);
+	qp_attrs.ord = params->ord;
+	qp_attrs.ird = params->ird;
+	qp_attrs.llp_stream_handle = cep->llp.sock;
+
+	/*
+	 * Currently no MPA markers support. Consider adding marker TX path.
+	 */
+	qp_attrs.mpa.marker_rcv = 0;
+	qp_attrs.mpa.marker_snd = 0;
+	qp_attrs.mpa.crc = cep->mpa.hdr.params.c;
+	qp_attrs.state = SIW_QP_STATE_RTS;
+
+	dprint(DBG_CM, "(id=0x%p, QP%d): Moving to RTS\n", id, QP_ID(qp));
+
+	/* Associate QP with CEP */
+	siw_cep_get(cep);
+	qp->cep = cep;
+
+	/* siw_qp_get(qp) already done by QP lookup */
+	cep->qp = qp;
+
+	cep->state = SIW_EPSTATE_RDMA_MODE;
+
+	/* Move socket RX/TX under QP control */
+	rv = siw_qp_modify(qp, &qp_attrs, SIW_QP_ATTR_STATE|
+					  SIW_QP_ATTR_LLP_HANDLE|
+					  SIW_QP_ATTR_ORD|
+					  SIW_QP_ATTR_IRD|
+					  SIW_QP_ATTR_MPA);
+	up_write(&qp->state_lock);
+
+	if (rv)
+		goto error;
+
+	if (params->private_data_len) {
+		pdata = (char *)params->private_data;
+
+		dprint(DBG_CM, "(id=0x%p, QP%d): %d bytes private_data\n",
+				id, QP_ID(qp), params->private_data_len);
+	}
+	cep->mpa.hdr.params.pd_len = params->private_data_len;
+
+	dprint(DBG_CM, "(id=0x%p, QP%d): Sending MPA Reply\n", id, QP_ID(qp));
+
+	rv = siw_send_mpareqrep(cep->llp.sock, &cep->mpa.hdr.params,
+				MPA_KEY_REP, pdata);
+
+	if (!rv) {
+		rv = siw_cm_upcall(cep, IW_CM_EVENT_ESTABLISHED, 0);
+		if (rv)
+			goto error;
+
+		siw_cep_set_free(cep);
+
+		dprint(DBG_CM, "(id=0x%p, QP%d): Exit\n", id, QP_ID(qp));
+		return 0;
+	}
+
+error:
+	siw_socket_disassoc(cep->llp.sock);
+	sock_release(cep->llp.sock);
+	cep->llp.sock = NULL;
+
+	cep->state = SIW_EPSTATE_CLOSED;
+
+	if (cep->cm_id) {
+		cep->cm_id->rem_ref(id);
+		cep->cm_id = NULL;
+	}
+	if (qp->cep) {
+		siw_cep_put(cep);
+		qp->cep = NULL;
+	}
+	cep->qp = NULL;
+	siw_qp_put(qp);
+
+	siw_cep_set_free(cep);
+	siw_cep_put(cep);
+
+	return rv;
+}
+
+/*
+ * siw_reject()
+ *
+ * Local connection reject case. Send private data back to peer,
+ * close connection and dereference connection id.
+ */
+int siw_reject(struct iw_cm_id *id, const void *pdata, u8 plen)
+{
+	struct siw_cep	*cep = (struct siw_cep *)id->provider_data;
+
+	siw_cep_set_inuse(cep);
+	siw_cep_put(cep);
+
+	if (cep->state != SIW_EPSTATE_RECVD_MPAREQ) {
+		if (cep->state == SIW_EPSTATE_CLOSED) {
+
+			dprint(DBG_CM, "(id=0x%p): Out of State\n", id);
+
+			siw_cep_set_free(cep);
+			siw_cep_put(cep); /* should be last reference */
+
+			return -ECONNRESET;
+		}
+		BUG();
+	}
+	dprint(DBG_CM, "(id=0x%p): cep->state=%d\n", id, cep->state);
+	dprint(DBG_CM, " Reject: %d: %x\n", plen, plen ? *(char *)pdata : 0);
+
+	if (cep->mpa.hdr.params.rev == MPA_REVISION_1) {
+		cep->mpa.hdr.params.r = 1; /* reject */
+		cep->mpa.hdr.params.pd_len = plen;
+		(void)siw_send_mpareqrep(cep->llp.sock, &cep->mpa.hdr.params,
+					 MPA_KEY_REP, pdata);
+	}
+	siw_socket_disassoc(cep->llp.sock);
+	sock_release(cep->llp.sock);
+	cep->llp.sock = NULL;
+
+	cep->state = SIW_EPSTATE_CLOSED;
+
+	siw_cep_set_free(cep);
+	siw_cep_put(cep);
+
+	return 0;
+}
+
+static int siw_listen_address(struct iw_cm_id *id, int backlog,
+			      struct sockaddr *laddr)
+{
+	struct socket		*s;
+	struct siw_cep		*cep = NULL;
+	int			rv = 0, s_val;
+
+	rv = sock_create(AF_INET, SOCK_STREAM, IPPROTO_TCP, &s);
+	if (rv < 0) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): ERROR: "
+			"sock_create(): rv=%d\n", id, rv);
+		return rv;
+	}
+
+	s_val = SOCKBUFSIZE;
+	rv = kernel_setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&s_val,
+			       sizeof s_val);
+	if (rv)
+		goto error;
+
+	rv = kernel_setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&s_val,
+			       sizeof s_val);
+	if (rv)
+		goto error;
+
+	/*
+	 * Probably to be removed later. Allows binding
+	 * local port when still in TIME_WAIT from last close.
+	 */
+	s_val = 1;
+	rv = kernel_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&s_val,
+			       sizeof s_val);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): ERROR: "
+			"kernel_setsockopt(): rv=%d\n", id, rv);
+		goto error;
+	}
+
+	rv = s->ops->bind(s, laddr, sizeof *laddr);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): ERROR: bind(): rv=%d\n",
+			id, rv);
+		goto error;
+	}
+
+	cep = siw_cep_alloc(siw_dev_ofa2siw(id->device));
+	if (!cep) {
+		rv = -ENOMEM;
+		goto error;
+	}
+	siw_cep_socket_assoc(cep, s);
+
+	rv = siw_cm_alloc_work(cep, backlog);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): ERROR: "
+			"siw_cm_alloc_work(backlog=%d): rv=%d\n",
+			id, backlog, rv);
+		goto error;
+	}
+
+	rv = s->ops->listen(s, backlog);
+	if (rv != 0) {
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): ERROR: listen() rv=%d\n",
+			id, rv);
+		goto error;
+	}
+
+	/*
+	 * TODO: Do we really need the copies of local_addr and remote_addr
+	 *	 in CEP ???
+	 */
+	memcpy(&cep->llp.laddr, &id->local_addr, sizeof cep->llp.laddr);
+	memcpy(&cep->llp.raddr, &id->remote_addr, sizeof cep->llp.raddr);
+
+	cep->cm_id = id;
+	id->add_ref(id);
+
+	/*
+	 * In case of a wildcard rdma_listen on a multi-homed device,
+	 * a listener's IWCM id is associated with more than one listening CEP.
+	 *
+	 * We currently use id->provider_data in three different ways:
+	 *
+	 * o For a listener's IWCM id, id->provider_data points to
+	 *   the list_head of the list of listening CEPs.
+	 *   Uses: siw_create_listen(), siw_destroy_listen()
+	 *
+	 * o For a passive-side IWCM id, id->provider_data points to
+	 *   the CEP itself. This is a consequence of
+	 *   - siw_cm_upcall() setting event.provider_data = cep and
+	 *   - the IWCM's cm_conn_req_handler() setting provider_data of the
+	 *     new passive-side IWCM id equal to event.provider_data
+	 *   Uses: siw_accept(), siw_reject()
+	 *
+	 * o For an active-side IWCM id, id->provider_data is not used at all.
+	 *
+	 */
+	if (!id->provider_data) {
+		id->provider_data = kmalloc(sizeof(struct list_head),
+					    GFP_KERNEL);
+		if (!id->provider_data) {
+			rv = -ENOMEM;
+			goto error;
+		}
+		INIT_LIST_HEAD((struct list_head *)id->provider_data);
+	}
+
+	dprint(DBG_CM, "(id=0x%p): dev(id)=%s, l2dev=%s, "
+		"id->provider_data=0x%p, cep=0x%p\n",
+		id, id->device->name,
+		siw_dev_ofa2siw(id->device)->l2dev->name,
+		id->provider_data, cep);
+
+	list_add_tail(&cep->listenq, (struct list_head *)id->provider_data);
+	cep->state = SIW_EPSTATE_LISTENING;
+	return 0;
+
+error:
+	dprint(DBG_CM, " Failed: %d\n", rv);
+
+	if (cep) {
+		if (cep->cm_id) {
+			cep->cm_id->rem_ref(cep->cm_id);
+			cep->cm_id = NULL;
+		}
+		cep->llp.sock = NULL;
+		siw_socket_disassoc(s);
+		cep->state = SIW_EPSTATE_CLOSED;
+		siw_cep_put(cep);
+	}
+	sock_release(s);
+	return rv;
+}
+
+static void siw_drop_listeners(struct iw_cm_id *id)
+{
+	struct list_head	*p, *tmp;
+	/*
+	 * In case of a wildcard rdma_listen on a multi-homed device,
+	 * a listener's IWCM id is associated with more than one listening CEP.
+	 */
+	list_for_each_safe(p, tmp, (struct list_head *)id->provider_data) {
+
+		struct siw_cep *cep = list_entry(p, struct siw_cep, listenq);
+		list_del(p);
+
+		dprint(DBG_CM, "(id=0x%p): drop CEP 0x%p, state %d\n",
+			id, cep, cep->state);
+		siw_cep_set_inuse(cep);
+
+		if (cep->cm_id) {
+			cep->cm_id->rem_ref(cep->cm_id);
+			cep->cm_id = NULL;
+		}
+		if (cep->llp.sock) {
+			siw_socket_disassoc(cep->llp.sock);
+			sock_release(cep->llp.sock);
+			cep->llp.sock = NULL;
+		}
+		cep->state = SIW_EPSTATE_CLOSED;
+		siw_cep_set_free(cep);
+		siw_cep_put(cep);
+	}
+}
+
+/*
+ * siw_create_listen - Create resources for a listener's IWCM ID @id
+ *
+ * Listens on the socket addresses id->local_addr and id->remote_addr.
+ * We support listening on multi-homed devices, i.e., Softiwarp devices
+ * whose underlying net_device is associated with multiple IP addresses.
+ * Wildcard listening (listening with zero IP address) is also supported.
+ *
+ * There are three design options for Softiwarp device management supporting
+ * - multiple physical Ethernet ports, i.e., multiple net_device instances, and
+ * - multiple IP addresses associated with net_device,
+ * as follows:
+ *
+ *    Option 1: One Softiwarp device per net_device and
+ *              IP address associated with the net_device
+ *    Option 2: One Softiwarp device per net_device
+ *              (and all IP addresses associated with the net_device)
+ *    Option 3: Single Softiwarp device for all net_device instances
+ *              (and all IP addresses associated with these instances)
+ *
+ * We currently use Option 2, registering a separate siw_dev for
+ * each net_device. Consequently, siw_create_listen() (called separately
+ * by the IWCM for each Softiwarp device) handles the associated IP address(es)
+ * as follows:
+ *
+ * - If the listener's @id provides a specific local IP address, at most one
+ *   listening socket is created and associated with @id.
+ *
+ * - If the listener's @id provides the wildcard (zero) local IP address,
+ *   a separate listen is performed for each local IP address of the device
+ *   by creating a listening socket and binding to that local IP address.
+ *   This avoids attempts to bind to the wildcard (zero) IP address
+ *   on multiple devices, which fails with -EADDRINUSE on the second and
+ *   all subsequent devices.
+ *
+ *   For the given IWCM and Option 2 above, the alternative approach of doing
+ *   a single wildcard listen by creating one listening socket and binding it
+ *   to the wildcard IP address is not a good idea if
+ *   - there is more than one Softiwarp device (e.g., for lo and eth0), or
+ *   - there are non-Softiwarp iWARP devices that cannot cooperate.
+ */
+int siw_create_listen(struct iw_cm_id *id, int backlog)
+{
+	struct ib_device	*ofa_dev = id->device;
+	struct siw_dev		*dev = siw_dev_ofa2siw(ofa_dev);
+	int			rv = 0;
+
+	dprint(DBG_CM, "(id=0x%p): dev(id)=%s, l2dev=%s backlog=%d\n",
+		id, ofa_dev->name, dev->l2dev->name, backlog);
+
+	/*
+	 * IPv4/v6 design differences regarding multi-homing
+	 * propagate up to iWARP:
+	 * o For IPv4, use dev->l2dev->ip_ptr
+	 * o For IPv6, use dev->l2dev->ipv6_ptr
+	 */
+	if (id->local_addr.sin_family == AF_INET) {
+		/* IPv4 */
+		struct sockaddr_in	laddr = id->local_addr;
+		u8			*l_ip, *r_ip;
+		struct in_device	*in_dev;
+
+		l_ip = (u8 *) &id->local_addr.sin_addr.s_addr;
+		r_ip = (u8 *) &id->remote_addr.sin_addr.s_addr;
+		dprint(DBG_CM, "(id=0x%p): "
+			"laddr(id)  : ipv4=%d.%d.%d.%d, port=%d; "
+			"raddr(id)  : ipv4=%d.%d.%d.%d, port=%d\n",
+			id,
+			l_ip[0], l_ip[1], l_ip[2], l_ip[3],
+			ntohs(id->local_addr.sin_port),
+			r_ip[0], r_ip[1], r_ip[2], r_ip[3],
+			ntohs(id->remote_addr.sin_port));
+
+		in_dev = in_dev_get(dev->l2dev);
+		if (!in_dev) {
+			dprint(DBG_CM|DBG_ON, "(id=0x%p): "
+				"l2dev has no in_device\n", id);
+			return -ENODEV;
+		}
+
+		/*
+		 * If in_dev is not configured, in_dev->ifa_list may be empty
+		 */
+		for_ifa(in_dev) {
+			/*
+			 * Create a listening socket if id->local_addr
+			 * contains the wildcard IP address OR
+			 * the IP address of the interface.
+			 */
+			if (ipv4_is_zeronet(id->local_addr.sin_addr.s_addr) ||
+					id->local_addr.sin_addr.s_addr ==
+					ifa->ifa_address) {
+				laddr.sin_addr.s_addr = ifa->ifa_address;
+
+				l_ip = (u8 *) &laddr.sin_addr.s_addr;
+				dprint(DBG_CM, "(id=0x%p): "
+					"laddr(bind): ipv4=%d.%d.%d.%d,"
+					" port=%d\n", id,
+					l_ip[0], l_ip[1], l_ip[2],
+					l_ip[3], ntohs(laddr.sin_port));
+
+				rv = siw_listen_address(id, backlog,
+						(struct sockaddr *)&laddr);
+				if (rv)
+					break;
+			}
+		}
+		endfor_ifa(in_dev);
+		in_dev_put(in_dev);
+
+		if (rv && id->provider_data)
+			siw_drop_listeners(id);
+
+	} else {
+		/* IPv6 */
+		dprint(DBG_CM|DBG_ON, "(id=0x%p): TODO: IPv6 support\n", id);
+	}
+	if (!rv)
+		dprint(DBG_CM, "(id=0x%p): Success\n", id);
+
+	return rv;
+}
+
+
+int siw_destroy_listen(struct iw_cm_id *id)
+{
+
+	dprint(DBG_CM, "(id=0x%p): dev(id)=%s, l2dev=%s\n",
+		id, id->device->name,
+		siw_dev_ofa2siw(id->device)->l2dev->name);
+
+	if (!id->provider_data) {
+		/*
+		 * TODO: See if there's a way to avoid getting any
+		 *       listener ids without a list of CEPs
+		 */
+		dprint(DBG_CM, "(id=0x%p): Listener id: no CEP(s)\n", id);
+		return 0;
+	}
+	siw_drop_listeners(id);
+	kfree(id->provider_data);
+	id->provider_data = NULL;
+
+	return 0;
+}
+
+int __init siw_cm_init(void)
+{
+	/*
+	 * create_single_workqueue for strict ordering
+	 */
+	siw_cm_wq = create_singlethread_workqueue("siw_cm_wq");
+	if (!siw_cm_wq)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void __exit siw_cm_exit(void)
+{
+	if (siw_cm_wq) {
+		flush_workqueue(siw_cm_wq);
+		destroy_workqueue(siw_cm_wq);
+	}
+}
diff --git a/drivers/infiniband/hw/siw/siw_cm.h b/drivers/infiniband/hw/siw/siw_cm.h
new file mode 100644
index 0000000..067172d
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_cm.h
@@ -0,0 +1,159 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@zurich.ibm.com>
+ *
+ * Copyright (c) 2008-2011, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ *   - Neither the name of IBM nor the names of its contributors may be
+ *     used to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * 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 _SIW_CM_H
+#define _SIW_CM_H
+
+#include <net/sock.h>
+#include <linux/tcp.h>
+
+#include <rdma/iw_cm.h>
+
+
+enum siw_cep_state {
+	SIW_EPSTATE_IDLE = 1,
+	SIW_EPSTATE_LISTENING,
+	SIW_EPSTATE_CONNECTING,
+	SIW_EPSTATE_AWAIT_MPAREQ,
+	SIW_EPSTATE_RECVD_MPAREQ,
+	SIW_EPSTATE_AWAIT_MPAREP,
+	SIW_EPSTATE_RDMA_MODE,
+	SIW_EPSTATE_CLOSED
+};
+
+struct siw_mpa_info {
+	struct mpa_rr	hdr;	/* peer mpa hdr in host byte order */
+	char		*pdata;
+	int		bytes_rcvd;
+};
+
+struct siw_llp_info {
+	struct socket		*sock;
+	struct sockaddr_in	laddr;	/* redundant with socket info above */
+	struct sockaddr_in	raddr;	/* dito, consider removal */
+	struct siw_sk_upcalls	sk_def_upcalls;
+};
+
+struct siw_dev;
+
+struct siw_cep {
+	struct iw_cm_id		*cm_id;
+	struct siw_dev		*dev;
+
+	struct list_head	devq;
+	/*
+	 * The provider_data element of a listener IWCM ID
+	 * refers to a list of one or more listener CEPs
+	 */
+	struct list_head	listenq;
+	struct siw_cep		*listen_cep;
+	struct siw_qp		*qp;
+	spinlock_t		lock;
+	wait_queue_head_t	waitq;
+	struct kref		ref;
+	enum siw_cep_state	state;
+	short			in_use;
+	struct siw_cm_work	*mpa_timer;
+	struct list_head	work_freelist;
+	struct siw_llp_info	llp;
+	struct siw_mpa_info	mpa;
+	int			ord;
+	int			ird;
+	int			sk_error; /* not (yet) used XXX */
+
+	/* Saved upcalls of socket llp.sock */
+	void    (*sk_state_change)(struct sock *sk);
+	void    (*sk_data_ready)(struct sock *sk, int bytes);
+	void    (*sk_write_space)(struct sock *sk);
+	void    (*sk_error_report)(struct sock *sk);
+};
+
+#define MPAREQ_TIMEOUT	(HZ*10)
+#define MPAREP_TIMEOUT	(HZ*5)
+
+enum siw_work_type {
+	SIW_CM_WORK_ACCEPT	= 1,
+	SIW_CM_WORK_READ_MPAHDR,
+	SIW_CM_WORK_CLOSE_LLP,		/* close socket */
+	SIW_CM_WORK_PEER_CLOSE,		/* socket indicated peer close */
+	SIW_CM_WORK_MPATIMEOUT
+};
+
+struct siw_cm_work {
+	struct delayed_work	work;
+	struct list_head	list;
+	enum siw_work_type	type;
+	struct siw_cep	*cep;
+};
+
+extern int siw_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
+extern int siw_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
+extern int siw_reject(struct iw_cm_id *, const void *, u8);
+extern int siw_create_listen(struct iw_cm_id *, int);
+extern int siw_destroy_listen(struct iw_cm_id *);
+
+extern void siw_cep_get(struct siw_cep *);
+extern void siw_cep_put(struct siw_cep *);
+extern int siw_cm_queue_work(struct siw_cep *, enum siw_work_type);
+
+extern int siw_cm_init(void);
+extern void siw_cm_exit(void);
+
+/*
+ * TCP socket interface
+ */
+#define sk_to_qp(sk)	(((struct siw_cep *)((sk)->sk_user_data))->qp)
+#define sk_to_cep(sk)	((struct siw_cep *)((sk)->sk_user_data))
+
+/*
+ * Should we use tcp_current_mss()?
+ * But its not exported by kernel.
+ */
+static inline unsigned int get_tcp_mss(struct sock *sk)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+
+
+	if (tp->xmit_size_goal_segs)
+		return tp->xmit_size_goal_segs * tp->mss_cache;
+
+	else
+		return tp->mss_cache;
+}
+
+#endif
