Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4528 insertions, 0 deletions

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
new file mode 100644
index 000000000..b7f902344
--- /dev/null
+++ b/drivers/infiniband/core/cm.c
@@ -0,0 +1,4528 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2004-2007 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
+ * Copyright (c) 2004, 2005 Voltaire Corporation.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2019, Mellanox Technologies inc.  All rights reserved.
+ */
+
+#include <linux/completion.h>
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/idr.h>
+#include <linux/interrupt.h>
+#include <linux/random.h>
+#include <linux/rbtree.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/workqueue.h>
+#include <linux/kdev_t.h>
+#include <linux/etherdevice.h>
+
+#include <rdma/ib_cache.h>
+#include <rdma/ib_cm.h>
+#include <rdma/ib_sysfs.h>
+#include "cm_msgs.h"
+#include "core_priv.h"
+#include "cm_trace.h"
+
+MODULE_AUTHOR("Sean Hefty");
+MODULE_DESCRIPTION("InfiniBand CM");
+MODULE_LICENSE("Dual BSD/GPL");
+
+static const char * const ibcm_rej_reason_strs[] = {
+	[IB_CM_REJ_NO_QP]			= "no QP",
+	[IB_CM_REJ_NO_EEC]			= "no EEC",
+	[IB_CM_REJ_NO_RESOURCES]		= "no resources",
+	[IB_CM_REJ_TIMEOUT]			= "timeout",
+	[IB_CM_REJ_UNSUPPORTED]			= "unsupported",
+	[IB_CM_REJ_INVALID_COMM_ID]		= "invalid comm ID",
+	[IB_CM_REJ_INVALID_COMM_INSTANCE]	= "invalid comm instance",
+	[IB_CM_REJ_INVALID_SERVICE_ID]		= "invalid service ID",
+	[IB_CM_REJ_INVALID_TRANSPORT_TYPE]	= "invalid transport type",
+	[IB_CM_REJ_STALE_CONN]			= "stale conn",
+	[IB_CM_REJ_RDC_NOT_EXIST]		= "RDC not exist",
+	[IB_CM_REJ_INVALID_GID]			= "invalid GID",
+	[IB_CM_REJ_INVALID_LID]			= "invalid LID",
+	[IB_CM_REJ_INVALID_SL]			= "invalid SL",
+	[IB_CM_REJ_INVALID_TRAFFIC_CLASS]	= "invalid traffic class",
+	[IB_CM_REJ_INVALID_HOP_LIMIT]		= "invalid hop limit",
+	[IB_CM_REJ_INVALID_PACKET_RATE]		= "invalid packet rate",
+	[IB_CM_REJ_INVALID_ALT_GID]		= "invalid alt GID",
+	[IB_CM_REJ_INVALID_ALT_LID]		= "invalid alt LID",
+	[IB_CM_REJ_INVALID_ALT_SL]		= "invalid alt SL",
+	[IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS]	= "invalid alt traffic class",
+	[IB_CM_REJ_INVALID_ALT_HOP_LIMIT]	= "invalid alt hop limit",
+	[IB_CM_REJ_INVALID_ALT_PACKET_RATE]	= "invalid alt packet rate",
+	[IB_CM_REJ_PORT_CM_REDIRECT]		= "port CM redirect",
+	[IB_CM_REJ_PORT_REDIRECT]		= "port redirect",
+	[IB_CM_REJ_INVALID_MTU]			= "invalid MTU",
+	[IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES]	= "insufficient resp resources",
+	[IB_CM_REJ_CONSUMER_DEFINED]		= "consumer defined",
+	[IB_CM_REJ_INVALID_RNR_RETRY]		= "invalid RNR retry",
+	[IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID]	= "duplicate local comm ID",
+	[IB_CM_REJ_INVALID_CLASS_VERSION]	= "invalid class version",
+	[IB_CM_REJ_INVALID_FLOW_LABEL]		= "invalid flow label",
+	[IB_CM_REJ_INVALID_ALT_FLOW_LABEL]	= "invalid alt flow label",
+	[IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] =
+		"vendor option is not supported",
+};
+
+const char *__attribute_const__ ibcm_reject_msg(int reason)
+{
+	size_t index = reason;
+
+	if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
+	    ibcm_rej_reason_strs[index])
+		return ibcm_rej_reason_strs[index];
+	else
+		return "unrecognized reason";
+}
+EXPORT_SYMBOL(ibcm_reject_msg);
+
+struct cm_id_private;
+struct cm_work;
+static int cm_add_one(struct ib_device *device);
+static void cm_remove_one(struct ib_device *device, void *client_data);
+static void cm_process_work(struct cm_id_private *cm_id_priv,
+			    struct cm_work *work);
+static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
+				   struct ib_cm_sidr_rep_param *param);
+static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
+			       const void *private_data, u8 private_data_len);
+static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
+			       void *private_data, u8 private_data_len);
+static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
+			      enum ib_cm_rej_reason reason, void *ari,
+			      u8 ari_length, const void *private_data,
+			      u8 private_data_len);
+
+static struct ib_client cm_client = {
+	.name   = "cm",
+	.add    = cm_add_one,
+	.remove = cm_remove_one
+};
+
+static struct ib_cm {
+	spinlock_t lock;
+	struct list_head device_list;
+	rwlock_t device_lock;
+	struct rb_root listen_service_table;
+	u64 listen_service_id;
+	/* struct rb_root peer_service_table; todo: fix peer to peer */
+	struct rb_root remote_qp_table;
+	struct rb_root remote_id_table;
+	struct rb_root remote_sidr_table;
+	struct xarray local_id_table;
+	u32 local_id_next;
+	__be32 random_id_operand;
+	struct list_head timewait_list;
+	struct workqueue_struct *wq;
+} cm;
+
+/* Counter indexes ordered by attribute ID */
+enum {
+	CM_REQ_COUNTER,
+	CM_MRA_COUNTER,
+	CM_REJ_COUNTER,
+	CM_REP_COUNTER,
+	CM_RTU_COUNTER,
+	CM_DREQ_COUNTER,
+	CM_DREP_COUNTER,
+	CM_SIDR_REQ_COUNTER,
+	CM_SIDR_REP_COUNTER,
+	CM_LAP_COUNTER,
+	CM_APR_COUNTER,
+	CM_ATTR_COUNT,
+	CM_ATTR_ID_OFFSET = 0x0010,
+};
+
+enum {
+	CM_XMIT,
+	CM_XMIT_RETRIES,
+	CM_RECV,
+	CM_RECV_DUPLICATES,
+	CM_COUNTER_GROUPS
+};
+
+struct cm_counter_attribute {
+	struct ib_port_attribute attr;
+	unsigned short group;
+	unsigned short index;
+};
+
+struct cm_port {
+	struct cm_device *cm_dev;
+	struct ib_mad_agent *mad_agent;
+	u32 port_num;
+	atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT];
+};
+
+struct cm_device {
+	struct kref kref;
+	struct list_head list;
+	spinlock_t mad_agent_lock;
+	struct ib_device *ib_device;
+	u8 ack_delay;
+	int going_down;
+	struct cm_port *port[];
+};
+
+struct cm_av {
+	struct cm_port *port;
+	struct rdma_ah_attr ah_attr;
+	u16 dlid_datapath;
+	u16 pkey_index;
+	u8 timeout;
+};
+
+struct cm_work {
+	struct delayed_work work;
+	struct list_head list;
+	struct cm_port *port;
+	struct ib_mad_recv_wc *mad_recv_wc;	/* Received MADs */
+	__be32 local_id;			/* Established / timewait */
+	__be32 remote_id;
+	struct ib_cm_event cm_event;
+	struct sa_path_rec path[];
+};
+
+struct cm_timewait_info {
+	struct cm_work work;
+	struct list_head list;
+	struct rb_node remote_qp_node;
+	struct rb_node remote_id_node;
+	__be64 remote_ca_guid;
+	__be32 remote_qpn;
+	u8 inserted_remote_qp;
+	u8 inserted_remote_id;
+};
+
+struct cm_id_private {
+	struct ib_cm_id	id;
+
+	struct rb_node service_node;
+	struct rb_node sidr_id_node;
+	u32 sidr_slid;
+	spinlock_t lock;	/* Do not acquire inside cm.lock */
+	struct completion comp;
+	refcount_t refcount;
+	/* Number of clients sharing this ib_cm_id. Only valid for listeners.
+	 * Protected by the cm.lock spinlock.
+	 */
+	int listen_sharecount;
+	struct rcu_head rcu;
+
+	struct ib_mad_send_buf *msg;
+	struct cm_timewait_info *timewait_info;
+	/* todo: use alternate port on send failure */
+	struct cm_av av;
+	struct cm_av alt_av;
+
+	void *private_data;
+	__be64 tid;
+	__be32 local_qpn;
+	__be32 remote_qpn;
+	enum ib_qp_type qp_type;
+	__be32 sq_psn;
+	__be32 rq_psn;
+	int timeout_ms;
+	enum ib_mtu path_mtu;
+	__be16 pkey;
+	u8 private_data_len;
+	u8 max_cm_retries;
+	u8 responder_resources;
+	u8 initiator_depth;
+	u8 retry_count;
+	u8 rnr_retry_count;
+	u8 service_timeout;
+	u8 target_ack_delay;
+
+	struct list_head work_list;
+	atomic_t work_count;
+
+	struct rdma_ucm_ece ece;
+};
+
+static void cm_dev_release(struct kref *kref)
+{
+	struct cm_device *cm_dev = container_of(kref, struct cm_device, kref);
+	u32 i;
+
+	rdma_for_each_port(cm_dev->ib_device, i)
+		kfree(cm_dev->port[i - 1]);
+
+	kfree(cm_dev);
+}
+
+static void cm_device_put(struct cm_device *cm_dev)
+{
+	kref_put(&cm_dev->kref, cm_dev_release);
+}
+
+static void cm_work_handler(struct work_struct *work);
+
+static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
+{
+	if (refcount_dec_and_test(&cm_id_priv->refcount))
+		complete(&cm_id_priv->comp);
+}
+
+static struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv)
+{
+	struct ib_mad_agent *mad_agent;
+	struct ib_mad_send_buf *m;
+	struct ib_ah *ah;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if (!cm_id_priv->av.port)
+		return ERR_PTR(-EINVAL);
+
+	spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
+	mad_agent = cm_id_priv->av.port->mad_agent;
+	if (!mad_agent) {
+		m = ERR_PTR(-EINVAL);
+		goto out;
+	}
+
+	ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0);
+	if (IS_ERR(ah)) {
+		m = ERR_CAST(ah);
+		goto out;
+	}
+
+	m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
+			       cm_id_priv->av.pkey_index,
+			       0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
+			       GFP_ATOMIC,
+			       IB_MGMT_BASE_VERSION);
+	if (IS_ERR(m)) {
+		rdma_destroy_ah(ah, 0);
+		goto out;
+	}
+
+	/* Timeout set by caller if response is expected. */
+	m->ah = ah;
+	m->retries = cm_id_priv->max_cm_retries;
+
+	refcount_inc(&cm_id_priv->refcount);
+	m->context[0] = cm_id_priv;
+
+out:
+	spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
+	return m;
+}
+
+static void cm_free_msg(struct ib_mad_send_buf *msg)
+{
+	struct cm_id_private *cm_id_priv = msg->context[0];
+
+	if (msg->ah)
+		rdma_destroy_ah(msg->ah, 0);
+	cm_deref_id(cm_id_priv);
+	ib_free_send_mad(msg);
+}
+
+static struct ib_mad_send_buf *
+cm_alloc_priv_msg(struct cm_id_private *cm_id_priv)
+{
+	struct ib_mad_send_buf *msg;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	msg = cm_alloc_msg(cm_id_priv);
+	if (IS_ERR(msg))
+		return msg;
+	cm_id_priv->msg = msg;
+	return msg;
+}
+
+static void cm_free_priv_msg(struct ib_mad_send_buf *msg)
+{
+	struct cm_id_private *cm_id_priv = msg->context[0];
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if (!WARN_ON(cm_id_priv->msg != msg))
+		cm_id_priv->msg = NULL;
+
+	if (msg->ah)
+		rdma_destroy_ah(msg->ah, 0);
+	cm_deref_id(cm_id_priv);
+	ib_free_send_mad(msg);
+}
+
+static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port,
+							   struct ib_mad_recv_wc *mad_recv_wc)
+{
+	return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
+				  0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
+				  GFP_ATOMIC,
+				  IB_MGMT_BASE_VERSION);
+}
+
+static int cm_create_response_msg_ah(struct cm_port *port,
+				     struct ib_mad_recv_wc *mad_recv_wc,
+				     struct ib_mad_send_buf *msg)
+{
+	struct ib_ah *ah;
+
+	ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
+				  mad_recv_wc->recv_buf.grh, port->port_num);
+	if (IS_ERR(ah))
+		return PTR_ERR(ah);
+
+	msg->ah = ah;
+	return 0;
+}
+
+static int cm_alloc_response_msg(struct cm_port *port,
+				 struct ib_mad_recv_wc *mad_recv_wc,
+				 struct ib_mad_send_buf **msg)
+{
+	struct ib_mad_send_buf *m;
+	int ret;
+
+	m = cm_alloc_response_msg_no_ah(port, mad_recv_wc);
+	if (IS_ERR(m))
+		return PTR_ERR(m);
+
+	ret = cm_create_response_msg_ah(port, mad_recv_wc, m);
+	if (ret) {
+		ib_free_send_mad(m);
+		return ret;
+	}
+
+	*msg = m;
+	return 0;
+}
+
+static void cm_free_response_msg(struct ib_mad_send_buf *msg)
+{
+	if (msg->ah)
+		rdma_destroy_ah(msg->ah, 0);
+	ib_free_send_mad(msg);
+}
+
+static void *cm_copy_private_data(const void *private_data, u8 private_data_len)
+{
+	void *data;
+
+	if (!private_data || !private_data_len)
+		return NULL;
+
+	data = kmemdup(private_data, private_data_len, GFP_KERNEL);
+	if (!data)
+		return ERR_PTR(-ENOMEM);
+
+	return data;
+}
+
+static void cm_set_private_data(struct cm_id_private *cm_id_priv,
+				 void *private_data, u8 private_data_len)
+{
+	if (cm_id_priv->private_data && cm_id_priv->private_data_len)
+		kfree(cm_id_priv->private_data);
+
+	cm_id_priv->private_data = private_data;
+	cm_id_priv->private_data_len = private_data_len;
+}
+
+static void cm_set_av_port(struct cm_av *av, struct cm_port *port)
+{
+	struct cm_port *old_port = av->port;
+
+	if (old_port == port)
+		return;
+
+	av->port = port;
+	if (old_port)
+		cm_device_put(old_port->cm_dev);
+	if (port)
+		kref_get(&port->cm_dev->kref);
+}
+
+static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc,
+			       struct rdma_ah_attr *ah_attr, struct cm_av *av)
+{
+	cm_set_av_port(av, port);
+	av->pkey_index = wc->pkey_index;
+	rdma_move_ah_attr(&av->ah_attr, ah_attr);
+}
+
+static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
+				   struct ib_grh *grh, struct cm_av *av)
+{
+	cm_set_av_port(av, port);
+	av->pkey_index = wc->pkey_index;
+	return ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
+				       port->port_num, wc,
+				       grh, &av->ah_attr);
+}
+
+static struct cm_port *
+get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr)
+{
+	struct cm_device *cm_dev;
+	struct cm_port *port = NULL;
+	unsigned long flags;
+
+	if (attr) {
+		read_lock_irqsave(&cm.device_lock, flags);
+		list_for_each_entry(cm_dev, &cm.device_list, list) {
+			if (cm_dev->ib_device == attr->device) {
+				port = cm_dev->port[attr->port_num - 1];
+				break;
+			}
+		}
+		read_unlock_irqrestore(&cm.device_lock, flags);
+	} else {
+		/* SGID attribute can be NULL in following
+		 * conditions.
+		 * (a) Alternative path
+		 * (b) IB link layer without GRH
+		 * (c) LAP send messages
+		 */
+		read_lock_irqsave(&cm.device_lock, flags);
+		list_for_each_entry(cm_dev, &cm.device_list, list) {
+			attr = rdma_find_gid(cm_dev->ib_device,
+					     &path->sgid,
+					     sa_conv_pathrec_to_gid_type(path),
+					     NULL);
+			if (!IS_ERR(attr)) {
+				port = cm_dev->port[attr->port_num - 1];
+				break;
+			}
+		}
+		read_unlock_irqrestore(&cm.device_lock, flags);
+		if (port)
+			rdma_put_gid_attr(attr);
+	}
+	return port;
+}
+
+static int cm_init_av_by_path(struct sa_path_rec *path,
+			      const struct ib_gid_attr *sgid_attr,
+			      struct cm_av *av)
+{
+	struct rdma_ah_attr new_ah_attr;
+	struct cm_device *cm_dev;
+	struct cm_port *port;
+	int ret;
+
+	port = get_cm_port_from_path(path, sgid_attr);
+	if (!port)
+		return -EINVAL;
+	cm_dev = port->cm_dev;
+
+	ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
+				  be16_to_cpu(path->pkey), &av->pkey_index);
+	if (ret)
+		return ret;
+
+	cm_set_av_port(av, port);
+
+	/*
+	 * av->ah_attr might be initialized based on wc or during
+	 * request processing time which might have reference to sgid_attr.
+	 * So initialize a new ah_attr on stack.
+	 * If initialization fails, old ah_attr is used for sending any
+	 * responses. If initialization is successful, than new ah_attr
+	 * is used by overwriting the old one. So that right ah_attr
+	 * can be used to return an error response.
+	 */
+	ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path,
+					&new_ah_attr, sgid_attr);
+	if (ret)
+		return ret;
+
+	av->timeout = path->packet_life_time + 1;
+	rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
+	return 0;
+}
+
+/* Move av created by cm_init_av_by_path(), so av.dgid is not moved */
+static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src)
+{
+	cm_set_av_port(dest, src->port);
+	cm_set_av_port(src, NULL);
+	dest->pkey_index = src->pkey_index;
+	rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr);
+	dest->timeout = src->timeout;
+}
+
+static void cm_destroy_av(struct cm_av *av)
+{
+	rdma_destroy_ah_attr(&av->ah_attr);
+	cm_set_av_port(av, NULL);
+}
+
+static u32 cm_local_id(__be32 local_id)
+{
+	return (__force u32) (local_id ^ cm.random_id_operand);
+}
+
+static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id)
+{
+	struct cm_id_private *cm_id_priv;
+
+	rcu_read_lock();
+	cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id));
+	if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id ||
+	    !refcount_inc_not_zero(&cm_id_priv->refcount))
+		cm_id_priv = NULL;
+	rcu_read_unlock();
+
+	return cm_id_priv;
+}
+
+/*
+ * Trivial helpers to strip endian annotation and compare; the
+ * endianness doesn't actually matter since we just need a stable
+ * order for the RB tree.
+ */
+static int be32_lt(__be32 a, __be32 b)
+{
+	return (__force u32) a < (__force u32) b;
+}
+
+static int be32_gt(__be32 a, __be32 b)
+{
+	return (__force u32) a > (__force u32) b;
+}
+
+static int be64_lt(__be64 a, __be64 b)
+{
+	return (__force u64) a < (__force u64) b;
+}
+
+static int be64_gt(__be64 a, __be64 b)
+{
+	return (__force u64) a > (__force u64) b;
+}
+
+/*
+ * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv
+ * if the new ID was inserted, NULL if it could not be inserted due to a
+ * collision, or the existing cm_id_priv ready for shared usage.
+ */
+static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv,
+					      ib_cm_handler shared_handler)
+{
+	struct rb_node **link = &cm.listen_service_table.rb_node;
+	struct rb_node *parent = NULL;
+	struct cm_id_private *cur_cm_id_priv;
+	__be64 service_id = cm_id_priv->id.service_id;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cm.lock, flags);
+	while (*link) {
+		parent = *link;
+		cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
+					  service_node);
+
+		if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
+			link = &(*link)->rb_left;
+		else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
+			link = &(*link)->rb_right;
+		else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
+			link = &(*link)->rb_left;
+		else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
+			link = &(*link)->rb_right;
+		else {
+			/*
+			 * Sharing an ib_cm_id with different handlers is not
+			 * supported
+			 */
+			if (cur_cm_id_priv->id.cm_handler != shared_handler ||
+			    cur_cm_id_priv->id.context ||
+			    WARN_ON(!cur_cm_id_priv->id.cm_handler)) {
+				spin_unlock_irqrestore(&cm.lock, flags);
+				return NULL;
+			}
+			refcount_inc(&cur_cm_id_priv->refcount);
+			cur_cm_id_priv->listen_sharecount++;
+			spin_unlock_irqrestore(&cm.lock, flags);
+			return cur_cm_id_priv;
+		}
+	}
+	cm_id_priv->listen_sharecount++;
+	rb_link_node(&cm_id_priv->service_node, parent, link);
+	rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
+	spin_unlock_irqrestore(&cm.lock, flags);
+	return cm_id_priv;
+}
+
+static struct cm_id_private *cm_find_listen(struct ib_device *device,
+					    __be64 service_id)
+{
+	struct rb_node *node = cm.listen_service_table.rb_node;
+	struct cm_id_private *cm_id_priv;
+
+	while (node) {
+		cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
+
+		if (device < cm_id_priv->id.device)
+			node = node->rb_left;
+		else if (device > cm_id_priv->id.device)
+			node = node->rb_right;
+		else if (be64_lt(service_id, cm_id_priv->id.service_id))
+			node = node->rb_left;
+		else if (be64_gt(service_id, cm_id_priv->id.service_id))
+			node = node->rb_right;
+		else {
+			refcount_inc(&cm_id_priv->refcount);
+			return cm_id_priv;
+		}
+	}
+	return NULL;
+}
+
+static struct cm_timewait_info *
+cm_insert_remote_id(struct cm_timewait_info *timewait_info)
+{
+	struct rb_node **link = &cm.remote_id_table.rb_node;
+	struct rb_node *parent = NULL;
+	struct cm_timewait_info *cur_timewait_info;
+	__be64 remote_ca_guid = timewait_info->remote_ca_guid;
+	__be32 remote_id = timewait_info->work.remote_id;
+
+	while (*link) {
+		parent = *link;
+		cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
+					     remote_id_node);
+		if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
+			link = &(*link)->rb_left;
+		else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
+			link = &(*link)->rb_right;
+		else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
+			link = &(*link)->rb_left;
+		else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
+			link = &(*link)->rb_right;
+		else
+			return cur_timewait_info;
+	}
+	timewait_info->inserted_remote_id = 1;
+	rb_link_node(&timewait_info->remote_id_node, parent, link);
+	rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
+	return NULL;
+}
+
+static struct cm_id_private *cm_find_remote_id(__be64 remote_ca_guid,
+					       __be32 remote_id)
+{
+	struct rb_node *node = cm.remote_id_table.rb_node;
+	struct cm_timewait_info *timewait_info;
+	struct cm_id_private *res = NULL;
+
+	spin_lock_irq(&cm.lock);
+	while (node) {
+		timewait_info = rb_entry(node, struct cm_timewait_info,
+					 remote_id_node);
+		if (be32_lt(remote_id, timewait_info->work.remote_id))
+			node = node->rb_left;
+		else if (be32_gt(remote_id, timewait_info->work.remote_id))
+			node = node->rb_right;
+		else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
+			node = node->rb_left;
+		else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
+			node = node->rb_right;
+		else {
+			res = cm_acquire_id(timewait_info->work.local_id,
+					     timewait_info->work.remote_id);
+			break;
+		}
+	}
+	spin_unlock_irq(&cm.lock);
+	return res;
+}
+
+static struct cm_timewait_info *
+cm_insert_remote_qpn(struct cm_timewait_info *timewait_info)
+{
+	struct rb_node **link = &cm.remote_qp_table.rb_node;
+	struct rb_node *parent = NULL;
+	struct cm_timewait_info *cur_timewait_info;
+	__be64 remote_ca_guid = timewait_info->remote_ca_guid;
+	__be32 remote_qpn = timewait_info->remote_qpn;
+
+	while (*link) {
+		parent = *link;
+		cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
+					     remote_qp_node);
+		if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
+			link = &(*link)->rb_left;
+		else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
+			link = &(*link)->rb_right;
+		else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
+			link = &(*link)->rb_left;
+		else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
+			link = &(*link)->rb_right;
+		else
+			return cur_timewait_info;
+	}
+	timewait_info->inserted_remote_qp = 1;
+	rb_link_node(&timewait_info->remote_qp_node, parent, link);
+	rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
+	return NULL;
+}
+
+static struct cm_id_private *
+cm_insert_remote_sidr(struct cm_id_private *cm_id_priv)
+{
+	struct rb_node **link = &cm.remote_sidr_table.rb_node;
+	struct rb_node *parent = NULL;
+	struct cm_id_private *cur_cm_id_priv;
+	__be32 remote_id = cm_id_priv->id.remote_id;
+
+	while (*link) {
+		parent = *link;
+		cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
+					  sidr_id_node);
+		if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
+			link = &(*link)->rb_left;
+		else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
+			link = &(*link)->rb_right;
+		else {
+			if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid)
+				link = &(*link)->rb_left;
+			else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid)
+				link = &(*link)->rb_right;
+			else
+				return cur_cm_id_priv;
+		}
+	}
+	rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
+	rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
+	return NULL;
+}
+
+static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device,
+					      ib_cm_handler cm_handler,
+					      void *context)
+{
+	struct cm_id_private *cm_id_priv;
+	u32 id;
+	int ret;
+
+	cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
+	if (!cm_id_priv)
+		return ERR_PTR(-ENOMEM);
+
+	cm_id_priv->id.state = IB_CM_IDLE;
+	cm_id_priv->id.device = device;
+	cm_id_priv->id.cm_handler = cm_handler;
+	cm_id_priv->id.context = context;
+	cm_id_priv->id.remote_cm_qpn = 1;
+
+	RB_CLEAR_NODE(&cm_id_priv->service_node);
+	RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
+	spin_lock_init(&cm_id_priv->lock);
+	init_completion(&cm_id_priv->comp);
+	INIT_LIST_HEAD(&cm_id_priv->work_list);
+	atomic_set(&cm_id_priv->work_count, -1);
+	refcount_set(&cm_id_priv->refcount, 1);
+
+	ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b,
+			      &cm.local_id_next, GFP_KERNEL);
+	if (ret < 0)
+		goto error;
+	cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
+
+	return cm_id_priv;
+
+error:
+	kfree(cm_id_priv);
+	return ERR_PTR(ret);
+}
+
+/*
+ * Make the ID visible to the MAD handlers and other threads that use the
+ * xarray.
+ */
+static void cm_finalize_id(struct cm_id_private *cm_id_priv)
+{
+	xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id),
+		 cm_id_priv, GFP_ATOMIC);
+}
+
+struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
+				 ib_cm_handler cm_handler,
+				 void *context)
+{
+	struct cm_id_private *cm_id_priv;
+
+	cm_id_priv = cm_alloc_id_priv(device, cm_handler, context);
+	if (IS_ERR(cm_id_priv))
+		return ERR_CAST(cm_id_priv);
+
+	cm_finalize_id(cm_id_priv);
+	return &cm_id_priv->id;
+}
+EXPORT_SYMBOL(ib_create_cm_id);
+
+static struct cm_work *cm_dequeue_work(struct cm_id_private *cm_id_priv)
+{
+	struct cm_work *work;
+
+	if (list_empty(&cm_id_priv->work_list))
+		return NULL;
+
+	work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
+	list_del(&work->list);
+	return work;
+}
+
+static void cm_free_work(struct cm_work *work)
+{
+	if (work->mad_recv_wc)
+		ib_free_recv_mad(work->mad_recv_wc);
+	kfree(work);
+}
+
+static void cm_queue_work_unlock(struct cm_id_private *cm_id_priv,
+				 struct cm_work *work)
+	__releases(&cm_id_priv->lock)
+{
+	bool immediate;
+
+	/*
+	 * To deliver the event to the user callback we have the drop the
+	 * spinlock, however, we need to ensure that the user callback is single
+	 * threaded and receives events in the temporal order. If there are
+	 * already events being processed then thread new events onto a list,
+	 * the thread currently processing will pick them up.
+	 */
+	immediate = atomic_inc_and_test(&cm_id_priv->work_count);
+	if (!immediate) {
+		list_add_tail(&work->list, &cm_id_priv->work_list);
+		/*
+		 * This routine always consumes incoming reference. Once queued
+		 * to the work_list then a reference is held by the thread
+		 * currently running cm_process_work() and this reference is not
+		 * needed.
+		 */
+		cm_deref_id(cm_id_priv);
+	}
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	if (immediate)
+		cm_process_work(cm_id_priv, work);
+}
+
+static inline int cm_convert_to_ms(int iba_time)
+{
+	/* approximate conversion to ms from 4.096us x 2^iba_time */
+	return 1 << max(iba_time - 8, 0);
+}
+
+/*
+ * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
+ * Because of how ack_timeout is stored, adding one doubles the timeout.
+ * To avoid large timeouts, select the max(ack_delay, life_time + 1), and
+ * increment it (round up) only if the other is within 50%.
+ */
+static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
+{
+	int ack_timeout = packet_life_time + 1;
+
+	if (ack_timeout >= ca_ack_delay)
+		ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
+	else
+		ack_timeout = ca_ack_delay +
+			      (ack_timeout >= (ca_ack_delay - 1));
+
+	return min(31, ack_timeout);
+}
+
+static void cm_remove_remote(struct cm_id_private *cm_id_priv)
+{
+	struct cm_timewait_info *timewait_info = cm_id_priv->timewait_info;
+
+	if (timewait_info->inserted_remote_id) {
+		rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
+		timewait_info->inserted_remote_id = 0;
+	}
+
+	if (timewait_info->inserted_remote_qp) {
+		rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
+		timewait_info->inserted_remote_qp = 0;
+	}
+}
+
+static struct cm_timewait_info *cm_create_timewait_info(__be32 local_id)
+{
+	struct cm_timewait_info *timewait_info;
+
+	timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
+	if (!timewait_info)
+		return ERR_PTR(-ENOMEM);
+
+	timewait_info->work.local_id = local_id;
+	INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
+	timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
+	return timewait_info;
+}
+
+static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
+{
+	int wait_time;
+	unsigned long flags;
+	struct cm_device *cm_dev;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
+	if (!cm_dev)
+		return;
+
+	spin_lock_irqsave(&cm.lock, flags);
+	cm_remove_remote(cm_id_priv);
+	list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
+	spin_unlock_irqrestore(&cm.lock, flags);
+
+	/*
+	 * The cm_id could be destroyed by the user before we exit timewait.
+	 * To protect against this, we search for the cm_id after exiting
+	 * timewait before notifying the user that we've exited timewait.
+	 */
+	cm_id_priv->id.state = IB_CM_TIMEWAIT;
+	wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
+
+	/* Check if the device started its remove_one */
+	spin_lock_irqsave(&cm.lock, flags);
+	if (!cm_dev->going_down)
+		queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
+				   msecs_to_jiffies(wait_time));
+	spin_unlock_irqrestore(&cm.lock, flags);
+
+	/*
+	 * The timewait_info is converted into a work and gets freed during
+	 * cm_free_work() in cm_timewait_handler().
+	 */
+	BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0);
+	cm_id_priv->timewait_info = NULL;
+}
+
+static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
+{
+	unsigned long flags;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	cm_id_priv->id.state = IB_CM_IDLE;
+	if (cm_id_priv->timewait_info) {
+		spin_lock_irqsave(&cm.lock, flags);
+		cm_remove_remote(cm_id_priv);
+		spin_unlock_irqrestore(&cm.lock, flags);
+		kfree(cm_id_priv->timewait_info);
+		cm_id_priv->timewait_info = NULL;
+	}
+}
+
+static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_work *work;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irq(&cm_id_priv->lock);
+retest:
+	switch (cm_id->state) {
+	case IB_CM_LISTEN:
+		spin_lock(&cm.lock);
+		if (--cm_id_priv->listen_sharecount > 0) {
+			/* The id is still shared. */
+			WARN_ON(refcount_read(&cm_id_priv->refcount) == 1);
+			spin_unlock(&cm.lock);
+			spin_unlock_irq(&cm_id_priv->lock);
+			cm_deref_id(cm_id_priv);
+			return;
+		}
+		cm_id->state = IB_CM_IDLE;
+		rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
+		RB_CLEAR_NODE(&cm_id_priv->service_node);
+		spin_unlock(&cm.lock);
+		break;
+	case IB_CM_SIDR_REQ_SENT:
+		cm_id->state = IB_CM_IDLE;
+		ib_cancel_mad(cm_id_priv->msg);
+		break;
+	case IB_CM_SIDR_REQ_RCVD:
+		cm_send_sidr_rep_locked(cm_id_priv,
+					&(struct ib_cm_sidr_rep_param){
+						.status = IB_SIDR_REJECT });
+		/* cm_send_sidr_rep_locked will not move to IDLE if it fails */
+		cm_id->state = IB_CM_IDLE;
+		break;
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+		ib_cancel_mad(cm_id_priv->msg);
+		cm_send_rej_locked(cm_id_priv, IB_CM_REJ_TIMEOUT,
+				   &cm_id_priv->id.device->node_guid,
+				   sizeof(cm_id_priv->id.device->node_guid),
+				   NULL, 0);
+		break;
+	case IB_CM_REQ_RCVD:
+		if (err == -ENOMEM) {
+			/* Do not reject to allow future retries. */
+			cm_reset_to_idle(cm_id_priv);
+		} else {
+			cm_send_rej_locked(cm_id_priv,
+					   IB_CM_REJ_CONSUMER_DEFINED, NULL, 0,
+					   NULL, 0);
+		}
+		break;
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		ib_cancel_mad(cm_id_priv->msg);
+		cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
+				   0, NULL, 0);
+		goto retest;
+	case IB_CM_MRA_REQ_SENT:
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+		cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
+				   0, NULL, 0);
+		break;
+	case IB_CM_ESTABLISHED:
+		if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
+			cm_id->state = IB_CM_IDLE;
+			break;
+		}
+		cm_send_dreq_locked(cm_id_priv, NULL, 0);
+		goto retest;
+	case IB_CM_DREQ_SENT:
+		ib_cancel_mad(cm_id_priv->msg);
+		cm_enter_timewait(cm_id_priv);
+		goto retest;
+	case IB_CM_DREQ_RCVD:
+		cm_send_drep_locked(cm_id_priv, NULL, 0);
+		WARN_ON(cm_id->state != IB_CM_TIMEWAIT);
+		goto retest;
+	case IB_CM_TIMEWAIT:
+		/*
+		 * The cm_acquire_id in cm_timewait_handler will stop working
+		 * once we do xa_erase below, so just move to idle here for
+		 * consistency.
+		 */
+		cm_id->state = IB_CM_IDLE;
+		break;
+	case IB_CM_IDLE:
+		break;
+	}
+	WARN_ON(cm_id->state != IB_CM_IDLE);
+
+	spin_lock(&cm.lock);
+	/* Required for cleanup paths related cm_req_handler() */
+	if (cm_id_priv->timewait_info) {
+		cm_remove_remote(cm_id_priv);
+		kfree(cm_id_priv->timewait_info);
+		cm_id_priv->timewait_info = NULL;
+	}
+
+	WARN_ON(cm_id_priv->listen_sharecount);
+	WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node));
+	if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
+		rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
+	spin_unlock(&cm.lock);
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	xa_erase(&cm.local_id_table, cm_local_id(cm_id->local_id));
+	cm_deref_id(cm_id_priv);
+	wait_for_completion(&cm_id_priv->comp);
+	while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
+		cm_free_work(work);
+
+	cm_destroy_av(&cm_id_priv->av);
+	cm_destroy_av(&cm_id_priv->alt_av);
+	kfree(cm_id_priv->private_data);
+	kfree_rcu(cm_id_priv, rcu);
+}
+
+void ib_destroy_cm_id(struct ib_cm_id *cm_id)
+{
+	cm_destroy_id(cm_id, 0);
+}
+EXPORT_SYMBOL(ib_destroy_cm_id);
+
+static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id)
+{
+	if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
+	    (service_id != IB_CM_ASSIGN_SERVICE_ID))
+		return -EINVAL;
+
+	if (service_id == IB_CM_ASSIGN_SERVICE_ID)
+		cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++);
+	else
+		cm_id_priv->id.service_id = service_id;
+
+	return 0;
+}
+
+/**
+ * ib_cm_listen - Initiates listening on the specified service ID for
+ *   connection and service ID resolution requests.
+ * @cm_id: Connection identifier associated with the listen request.
+ * @service_id: Service identifier matched against incoming connection
+ *   and service ID resolution requests.  The service ID should be specified
+ *   network-byte order.  If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
+ *   assign a service ID to the caller.
+ */
+int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id)
+{
+	struct cm_id_private *cm_id_priv =
+		container_of(cm_id, struct cm_id_private, id);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	if (cm_id_priv->id.state != IB_CM_IDLE) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = cm_init_listen(cm_id_priv, service_id);
+	if (ret)
+		goto out;
+
+	if (!cm_insert_listen(cm_id_priv, NULL)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	cm_id_priv->id.state = IB_CM_LISTEN;
+	ret = 0;
+
+out:
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_cm_listen);
+
+/**
+ * ib_cm_insert_listen - Create a new listening ib_cm_id and listen on
+ *			 the given service ID.
+ *
+ * If there's an existing ID listening on that same device and service ID,
+ * return it.
+ *
+ * @device: Device associated with the cm_id.  All related communication will
+ * be associated with the specified device.
+ * @cm_handler: Callback invoked to notify the user of CM events.
+ * @service_id: Service identifier matched against incoming connection
+ *   and service ID resolution requests.  The service ID should be specified
+ *   network-byte order.  If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
+ *   assign a service ID to the caller.
+ *
+ * Callers should call ib_destroy_cm_id when done with the listener ID.
+ */
+struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
+				     ib_cm_handler cm_handler,
+				     __be64 service_id)
+{
+	struct cm_id_private *listen_id_priv;
+	struct cm_id_private *cm_id_priv;
+	int err = 0;
+
+	/* Create an ID in advance, since the creation may sleep */
+	cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL);
+	if (IS_ERR(cm_id_priv))
+		return ERR_CAST(cm_id_priv);
+
+	err = cm_init_listen(cm_id_priv, service_id);
+	if (err) {
+		ib_destroy_cm_id(&cm_id_priv->id);
+		return ERR_PTR(err);
+	}
+
+	spin_lock_irq(&cm_id_priv->lock);
+	listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler);
+	if (listen_id_priv != cm_id_priv) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		ib_destroy_cm_id(&cm_id_priv->id);
+		if (!listen_id_priv)
+			return ERR_PTR(-EINVAL);
+		return &listen_id_priv->id;
+	}
+	cm_id_priv->id.state = IB_CM_LISTEN;
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	/*
+	 * A listen ID does not need to be in the xarray since it does not
+	 * receive mads, is not placed in the remote_id or remote_qpn rbtree,
+	 * and does not enter timewait.
+	 */
+
+	return &cm_id_priv->id;
+}
+EXPORT_SYMBOL(ib_cm_insert_listen);
+
+static __be64 cm_form_tid(struct cm_id_private *cm_id_priv)
+{
+	u64 hi_tid = 0, low_tid;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	low_tid = (u64)cm_id_priv->id.local_id;
+	if (!cm_id_priv->av.port)
+		return cpu_to_be64(low_tid);
+
+	spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
+	if (cm_id_priv->av.port->mad_agent)
+		hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32;
+	spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
+	return cpu_to_be64(hi_tid | low_tid);
+}
+
+static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
+			      __be16 attr_id, __be64 tid)
+{
+	hdr->base_version  = IB_MGMT_BASE_VERSION;
+	hdr->mgmt_class	   = IB_MGMT_CLASS_CM;
+	hdr->class_version = IB_CM_CLASS_VERSION;
+	hdr->method	   = IB_MGMT_METHOD_SEND;
+	hdr->attr_id	   = attr_id;
+	hdr->tid	   = tid;
+}
+
+static void cm_format_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id,
+				  __be64 tid, u32 attr_mod)
+{
+	cm_format_mad_hdr(hdr, attr_id, tid);
+	hdr->attr_mod = cpu_to_be32(attr_mod);
+}
+
+static void cm_format_req(struct cm_req_msg *req_msg,
+			  struct cm_id_private *cm_id_priv,
+			  struct ib_cm_req_param *param)
+{
+	struct sa_path_rec *pri_path = param->primary_path;
+	struct sa_path_rec *alt_path = param->alternate_path;
+	bool pri_ext = false;
+	__be16 lid;
+
+	if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA)
+		pri_ext = opa_is_extended_lid(pri_path->opa.dlid,
+					      pri_path->opa.slid);
+
+	cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
+			      cm_form_tid(cm_id_priv), param->ece.attr_mod);
+
+	IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id));
+	IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg,
+		be64_to_cpu(cm_id_priv->id.device->node_guid));
+	IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num);
+	IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth);
+	IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg,
+		param->remote_cm_response_timeout);
+	cm_req_set_qp_type(req_msg, param->qp_type);
+	IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control);
+	IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn);
+	IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg,
+		param->local_cm_response_timeout);
+	IBA_SET(CM_REQ_PARTITION_KEY, req_msg,
+		be16_to_cpu(param->primary_path->pkey));
+	IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg,
+		param->primary_path->mtu);
+	IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries);
+
+	if (param->qp_type != IB_QPT_XRC_INI) {
+		IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg,
+			param->responder_resources);
+		IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count);
+		IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg,
+			param->rnr_retry_count);
+		IBA_SET(CM_REQ_SRQ, req_msg, param->srq);
+	}
+
+	*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) =
+		pri_path->sgid;
+	*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) =
+		pri_path->dgid;
+	if (pri_ext) {
+		IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)
+			->global.interface_id =
+			OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid));
+		IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)
+			->global.interface_id =
+			OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid));
+	}
+	if (pri_path->hop_limit <= 1) {
+		IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
+			be16_to_cpu(pri_ext ? 0 :
+					      htons(ntohl(sa_path_get_slid(
+						      pri_path)))));
+		IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
+			be16_to_cpu(pri_ext ? 0 :
+					      htons(ntohl(sa_path_get_dlid(
+						      pri_path)))));
+	} else {
+
+		if (param->primary_path_inbound) {
+			lid = param->primary_path_inbound->ib.dlid;
+			IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(lid));
+		} else
+			IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(IB_LID_PERMISSIVE));
+
+		/* Work-around until there's a way to obtain remote LID info */
+		IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
+			be16_to_cpu(IB_LID_PERMISSIVE));
+	}
+	IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg,
+		be32_to_cpu(pri_path->flow_label));
+	IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate);
+	IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class);
+	IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit);
+	IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl);
+	IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg,
+		(pri_path->hop_limit <= 1));
+	IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg,
+		cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
+			       pri_path->packet_life_time));
+
+	if (alt_path) {
+		bool alt_ext = false;
+
+		if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA)
+			alt_ext = opa_is_extended_lid(alt_path->opa.dlid,
+						      alt_path->opa.slid);
+
+		*IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) =
+			alt_path->sgid;
+		*IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) =
+			alt_path->dgid;
+		if (alt_ext) {
+			IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
+					req_msg)
+				->global.interface_id =
+				OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid));
+			IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID,
+					req_msg)
+				->global.interface_id =
+				OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid));
+		}
+		if (alt_path->hop_limit <= 1) {
+			IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(
+					alt_ext ? 0 :
+						  htons(ntohl(sa_path_get_slid(
+							  alt_path)))));
+			IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
+				be16_to_cpu(
+					alt_ext ? 0 :
+						  htons(ntohl(sa_path_get_dlid(
+							  alt_path)))));
+		} else {
+			IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(IB_LID_PERMISSIVE));
+			IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
+				be16_to_cpu(IB_LID_PERMISSIVE));
+		}
+		IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg,
+			be32_to_cpu(alt_path->flow_label));
+		IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate);
+		IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg,
+			alt_path->traffic_class);
+		IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg,
+			alt_path->hop_limit);
+		IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl);
+		IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg,
+			(alt_path->hop_limit <= 1));
+		IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg,
+			cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
+				       alt_path->packet_life_time));
+	}
+	IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id);
+
+	if (param->private_data && param->private_data_len)
+		IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data,
+			    param->private_data_len);
+}
+
+static int cm_validate_req_param(struct ib_cm_req_param *param)
+{
+	if (!param->primary_path)
+		return -EINVAL;
+
+	if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
+	    param->qp_type != IB_QPT_XRC_INI)
+		return -EINVAL;
+
+	if (param->private_data &&
+	    param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	if (param->alternate_path &&
+	    (param->alternate_path->pkey != param->primary_path->pkey ||
+	     param->alternate_path->mtu != param->primary_path->mtu))
+		return -EINVAL;
+
+	return 0;
+}
+
+int ib_send_cm_req(struct ib_cm_id *cm_id,
+		   struct ib_cm_req_param *param)
+{
+	struct cm_av av = {}, alt_av = {};
+	struct cm_id_private *cm_id_priv;
+	struct ib_mad_send_buf *msg;
+	struct cm_req_msg *req_msg;
+	unsigned long flags;
+	int ret;
+
+	ret = cm_validate_req_param(param);
+	if (ret)
+		return ret;
+
+	/* Verify that we're not in timewait. */
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) {
+		spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+		return -EINVAL;
+	}
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+
+	cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
+							    id.local_id);
+	if (IS_ERR(cm_id_priv->timewait_info)) {
+		ret = PTR_ERR(cm_id_priv->timewait_info);
+		cm_id_priv->timewait_info = NULL;
+		return ret;
+	}
+
+	ret = cm_init_av_by_path(param->primary_path,
+				 param->ppath_sgid_attr, &av);
+	if (ret)
+		return ret;
+	if (param->alternate_path) {
+		ret = cm_init_av_by_path(param->alternate_path, NULL,
+					 &alt_av);
+		if (ret) {
+			cm_destroy_av(&av);
+			return ret;
+		}
+	}
+	cm_id->service_id = param->service_id;
+	cm_id_priv->timeout_ms = cm_convert_to_ms(
+				    param->primary_path->packet_life_time) * 2 +
+				 cm_convert_to_ms(
+				    param->remote_cm_response_timeout);
+	cm_id_priv->max_cm_retries = param->max_cm_retries;
+	cm_id_priv->initiator_depth = param->initiator_depth;
+	cm_id_priv->responder_resources = param->responder_resources;
+	cm_id_priv->retry_count = param->retry_count;
+	cm_id_priv->path_mtu = param->primary_path->mtu;
+	cm_id_priv->pkey = param->primary_path->pkey;
+	cm_id_priv->qp_type = param->qp_type;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+
+	cm_move_av_from_path(&cm_id_priv->av, &av);
+	if (param->primary_path_outbound)
+		cm_id_priv->av.dlid_datapath =
+			be16_to_cpu(param->primary_path_outbound->ib.dlid);
+
+	if (param->alternate_path)
+		cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
+
+	msg = cm_alloc_priv_msg(cm_id_priv);
+	if (IS_ERR(msg)) {
+		ret = PTR_ERR(msg);
+		goto out_unlock;
+	}
+
+	req_msg = (struct cm_req_msg *)msg->mad;
+	cm_format_req(req_msg, cm_id_priv, param);
+	cm_id_priv->tid = req_msg->hdr.tid;
+	msg->timeout_ms = cm_id_priv->timeout_ms;
+	msg->context[1] = (void *)(unsigned long)IB_CM_REQ_SENT;
+
+	cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
+	cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
+
+	trace_icm_send_req(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		goto out_free;
+	BUG_ON(cm_id->state != IB_CM_IDLE);
+	cm_id->state = IB_CM_REQ_SENT;
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return 0;
+out_free:
+	cm_free_priv_msg(msg);
+out_unlock:
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_req);
+
+static int cm_issue_rej(struct cm_port *port,
+			struct ib_mad_recv_wc *mad_recv_wc,
+			enum ib_cm_rej_reason reason,
+			enum cm_msg_response msg_rejected,
+			void *ari, u8 ari_length)
+{
+	struct ib_mad_send_buf *msg = NULL;
+	struct cm_rej_msg *rej_msg, *rcv_msg;
+	int ret;
+
+	ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
+	if (ret)
+		return ret;
+
+	/* We just need common CM header information.  Cast to any message. */
+	rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
+	rej_msg = (struct cm_rej_msg *) msg->mad;
+
+	cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
+	IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
+		IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg));
+	IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
+		IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
+	IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected);
+	IBA_SET(CM_REJ_REASON, rej_msg, reason);
+
+	if (ari && ari_length) {
+		IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
+		IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
+	}
+
+	trace_icm_issue_rej(
+		IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg),
+		IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		cm_free_response_msg(msg);
+
+	return ret;
+}
+
+static bool cm_req_has_alt_path(struct cm_req_msg *req_msg)
+{
+	return ((cpu_to_be16(
+			IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) ||
+		(ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
+					       req_msg))));
+}
+
+static void cm_path_set_rec_type(struct ib_device *ib_device, u32 port_num,
+				 struct sa_path_rec *path, union ib_gid *gid)
+{
+	if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num))
+		path->rec_type = SA_PATH_REC_TYPE_OPA;
+	else
+		path->rec_type = SA_PATH_REC_TYPE_IB;
+}
+
+static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg,
+					struct sa_path_rec *primary_path,
+					struct sa_path_rec *alt_path,
+					struct ib_wc *wc)
+{
+	u32 lid;
+
+	if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) {
+		sa_path_set_dlid(primary_path, wc->slid);
+		sa_path_set_slid(primary_path,
+				 IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
+					 req_msg));
+	} else {
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg));
+		sa_path_set_dlid(primary_path, lid);
+
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg));
+		sa_path_set_slid(primary_path, lid);
+	}
+
+	if (!cm_req_has_alt_path(req_msg))
+		return;
+
+	if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) {
+		sa_path_set_dlid(alt_path,
+				 IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
+					 req_msg));
+		sa_path_set_slid(alt_path,
+				 IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
+					 req_msg));
+	} else {
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg));
+		sa_path_set_dlid(alt_path, lid);
+
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg));
+		sa_path_set_slid(alt_path, lid);
+	}
+}
+
+static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
+				     struct sa_path_rec *primary_path,
+				     struct sa_path_rec *alt_path,
+				     struct ib_wc *wc)
+{
+	primary_path->dgid =
+		*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg);
+	primary_path->sgid =
+		*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg);
+	primary_path->flow_label =
+		cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg));
+	primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg);
+	primary_path->traffic_class =
+		IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg);
+	primary_path->reversible = 1;
+	primary_path->pkey =
+		cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
+	primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg);
+	primary_path->mtu_selector = IB_SA_EQ;
+	primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
+	primary_path->rate_selector = IB_SA_EQ;
+	primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg);
+	primary_path->packet_life_time_selector = IB_SA_EQ;
+	primary_path->packet_life_time =
+		IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg);
+	primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
+	primary_path->service_id =
+		cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
+	if (sa_path_is_roce(primary_path))
+		primary_path->roce.route_resolved = false;
+
+	if (cm_req_has_alt_path(req_msg)) {
+		alt_path->dgid = *IBA_GET_MEM_PTR(
+			CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg);
+		alt_path->sgid = *IBA_GET_MEM_PTR(
+			CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg);
+		alt_path->flow_label = cpu_to_be32(
+			IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg));
+		alt_path->hop_limit =
+			IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg);
+		alt_path->traffic_class =
+			IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg);
+		alt_path->reversible = 1;
+		alt_path->pkey =
+			cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
+		alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg);
+		alt_path->mtu_selector = IB_SA_EQ;
+		alt_path->mtu =
+			IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
+		alt_path->rate_selector = IB_SA_EQ;
+		alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg);
+		alt_path->packet_life_time_selector = IB_SA_EQ;
+		alt_path->packet_life_time =
+			IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg);
+		alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
+		alt_path->service_id =
+			cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
+
+		if (sa_path_is_roce(alt_path))
+			alt_path->roce.route_resolved = false;
+	}
+	cm_format_path_lid_from_req(req_msg, primary_path, alt_path, wc);
+}
+
+static u16 cm_get_bth_pkey(struct cm_work *work)
+{
+	struct ib_device *ib_dev = work->port->cm_dev->ib_device;
+	u32 port_num = work->port->port_num;
+	u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
+	u16 pkey;
+	int ret;
+
+	ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
+	if (ret) {
+		dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %u, pkey index %u). %d\n",
+				     port_num, pkey_index, ret);
+		return 0;
+	}
+
+	return pkey;
+}
+
+/**
+ * cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID
+ * ULPs (such as IPoIB) do not understand OPA GIDs and will
+ * reject them as the local_gid will not match the sgid. Therefore,
+ * change the pathrec's SGID to an IB SGID.
+ *
+ * @work: Work completion
+ * @path: Path record
+ */
+static void cm_opa_to_ib_sgid(struct cm_work *work,
+			      struct sa_path_rec *path)
+{
+	struct ib_device *dev = work->port->cm_dev->ib_device;
+	u32 port_num = work->port->port_num;
+
+	if (rdma_cap_opa_ah(dev, port_num) &&
+	    (ib_is_opa_gid(&path->sgid))) {
+		union ib_gid sgid;
+
+		if (rdma_query_gid(dev, port_num, 0, &sgid)) {
+			dev_warn(&dev->dev,
+				 "Error updating sgid in CM request\n");
+			return;
+		}
+
+		path->sgid = sgid;
+	}
+}
+
+static void cm_format_req_event(struct cm_work *work,
+				struct cm_id_private *cm_id_priv,
+				struct ib_cm_id *listen_id)
+{
+	struct cm_req_msg *req_msg;
+	struct ib_cm_req_event_param *param;
+
+	req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
+	param = &work->cm_event.param.req_rcvd;
+	param->listen_id = listen_id;
+	param->bth_pkey = cm_get_bth_pkey(work);
+	param->port = cm_id_priv->av.port->port_num;
+	param->primary_path = &work->path[0];
+	cm_opa_to_ib_sgid(work, param->primary_path);
+	if (cm_req_has_alt_path(req_msg)) {
+		param->alternate_path = &work->path[1];
+		cm_opa_to_ib_sgid(work, param->alternate_path);
+	} else {
+		param->alternate_path = NULL;
+	}
+	param->remote_ca_guid =
+		cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
+	param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg);
+	param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg);
+	param->qp_type = cm_req_get_qp_type(req_msg);
+	param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg);
+	param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
+	param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
+	param->local_cm_response_timeout =
+		IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg);
+	param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg);
+	param->remote_cm_response_timeout =
+		IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg);
+	param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
+	param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
+	param->srq = IBA_GET(CM_REQ_SRQ, req_msg);
+	param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
+	param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg);
+	param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod);
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg);
+}
+
+static void cm_process_work(struct cm_id_private *cm_id_priv,
+			    struct cm_work *work)
+{
+	int ret;
+
+	/* We will typically only have the current event to report. */
+	ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
+	cm_free_work(work);
+
+	while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
+		spin_lock_irq(&cm_id_priv->lock);
+		work = cm_dequeue_work(cm_id_priv);
+		spin_unlock_irq(&cm_id_priv->lock);
+		if (!work)
+			return;
+
+		ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
+						&work->cm_event);
+		cm_free_work(work);
+	}
+	cm_deref_id(cm_id_priv);
+	if (ret)
+		cm_destroy_id(&cm_id_priv->id, ret);
+}
+
+static void cm_format_mra(struct cm_mra_msg *mra_msg,
+			  struct cm_id_private *cm_id_priv,
+			  enum cm_msg_response msg_mraed, u8 service_timeout,
+			  const void *private_data, u8 private_data_len)
+{
+	cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
+	IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed);
+	IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+	IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, service_timeout);
+
+	if (private_data && private_data_len)
+		IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, private_data,
+			    private_data_len);
+}
+
+static void cm_format_rej(struct cm_rej_msg *rej_msg,
+			  struct cm_id_private *cm_id_priv,
+			  enum ib_cm_rej_reason reason, void *ari,
+			  u8 ari_length, const void *private_data,
+			  u8 private_data_len, enum ib_cm_state state)
+{
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
+	IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+
+	switch (state) {
+	case IB_CM_REQ_RCVD:
+		IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0));
+		IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
+		break;
+	case IB_CM_MRA_REQ_SENT:
+		IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
+			be32_to_cpu(cm_id_priv->id.local_id));
+		IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
+		break;
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+		IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
+			be32_to_cpu(cm_id_priv->id.local_id));
+		IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP);
+		break;
+	default:
+		IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
+			be32_to_cpu(cm_id_priv->id.local_id));
+		IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg,
+			CM_MSG_RESPONSE_OTHER);
+		break;
+	}
+
+	IBA_SET(CM_REJ_REASON, rej_msg, reason);
+	if (ari && ari_length) {
+		IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
+		IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
+	}
+
+	if (private_data && private_data_len)
+		IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, private_data,
+			    private_data_len);
+}
+
+static void cm_dup_req_handler(struct cm_work *work,
+			       struct cm_id_private *cm_id_priv)
+{
+	struct ib_mad_send_buf *msg = NULL;
+	int ret;
+
+	atomic_long_inc(
+		&work->port->counters[CM_RECV_DUPLICATES][CM_REQ_COUNTER]);
+
+	/* Quick state check to discard duplicate REQs. */
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state == IB_CM_REQ_RCVD) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		return;
+	}
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
+	if (ret)
+		return;
+
+	spin_lock_irq(&cm_id_priv->lock);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_MRA_REQ_SENT:
+		cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
+			      CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
+			      cm_id_priv->private_data,
+			      cm_id_priv->private_data_len);
+		break;
+	case IB_CM_TIMEWAIT:
+		cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv,
+			      IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0,
+			      IB_CM_TIMEWAIT);
+		break;
+	default:
+		goto unlock;
+	}
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	trace_icm_send_dup_req(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		goto free;
+	return;
+
+unlock:	spin_unlock_irq(&cm_id_priv->lock);
+free:	cm_free_response_msg(msg);
+}
+
+static struct cm_id_private *cm_match_req(struct cm_work *work,
+					  struct cm_id_private *cm_id_priv)
+{
+	struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
+	struct cm_timewait_info *timewait_info;
+	struct cm_req_msg *req_msg;
+
+	req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
+
+	/* Check for possible duplicate REQ. */
+	spin_lock_irq(&cm.lock);
+	timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
+	if (timewait_info) {
+		cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
+					   timewait_info->work.remote_id);
+		spin_unlock_irq(&cm.lock);
+		if (cur_cm_id_priv) {
+			cm_dup_req_handler(work, cur_cm_id_priv);
+			cm_deref_id(cur_cm_id_priv);
+		}
+		return NULL;
+	}
+
+	/* Check for stale connections. */
+	timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
+	if (timewait_info) {
+		cm_remove_remote(cm_id_priv);
+		cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
+					   timewait_info->work.remote_id);
+
+		spin_unlock_irq(&cm.lock);
+		cm_issue_rej(work->port, work->mad_recv_wc,
+			     IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
+			     NULL, 0);
+		if (cur_cm_id_priv) {
+			ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
+			cm_deref_id(cur_cm_id_priv);
+		}
+		return NULL;
+	}
+
+	/* Find matching listen request. */
+	listen_cm_id_priv = cm_find_listen(
+		cm_id_priv->id.device,
+		cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)));
+	if (!listen_cm_id_priv) {
+		cm_remove_remote(cm_id_priv);
+		spin_unlock_irq(&cm.lock);
+		cm_issue_rej(work->port, work->mad_recv_wc,
+			     IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
+			     NULL, 0);
+		return NULL;
+	}
+	spin_unlock_irq(&cm.lock);
+	return listen_cm_id_priv;
+}
+
+/*
+ * Work-around for inter-subnet connections.  If the LIDs are permissive,
+ * we need to override the LID/SL data in the REQ with the LID information
+ * in the work completion.
+ */
+static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
+{
+	if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) {
+		if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
+					req_msg)) == IB_LID_PERMISSIVE) {
+			IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(ib_lid_be16(wc->slid)));
+			IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
+		}
+
+		if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
+					req_msg)) == IB_LID_PERMISSIVE)
+			IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
+				wc->dlid_path_bits);
+	}
+
+	if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) {
+		if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
+					req_msg)) == IB_LID_PERMISSIVE) {
+			IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
+				be16_to_cpu(ib_lid_be16(wc->slid)));
+			IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl);
+		}
+
+		if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
+					req_msg)) == IB_LID_PERMISSIVE)
+			IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
+				wc->dlid_path_bits);
+	}
+}
+
+static int cm_req_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
+	struct cm_req_msg *req_msg;
+	const struct ib_global_route *grh;
+	const struct ib_gid_attr *gid_attr;
+	int ret;
+
+	req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
+
+	cm_id_priv =
+		cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
+	if (IS_ERR(cm_id_priv))
+		return PTR_ERR(cm_id_priv);
+
+	cm_id_priv->id.remote_id =
+		cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg));
+	cm_id_priv->id.service_id =
+		cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
+	cm_id_priv->tid = req_msg->hdr.tid;
+	cm_id_priv->timeout_ms = cm_convert_to_ms(
+		IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg));
+	cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg);
+	cm_id_priv->remote_qpn =
+		cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
+	cm_id_priv->initiator_depth =
+		IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
+	cm_id_priv->responder_resources =
+		IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
+	cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
+	cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
+	cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
+	cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
+	cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
+	cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
+
+	ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
+				      work->mad_recv_wc->recv_buf.grh,
+				      &cm_id_priv->av);
+	if (ret)
+		goto destroy;
+	cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
+							    id.local_id);
+	if (IS_ERR(cm_id_priv->timewait_info)) {
+		ret = PTR_ERR(cm_id_priv->timewait_info);
+		cm_id_priv->timewait_info = NULL;
+		goto destroy;
+	}
+	cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id;
+	cm_id_priv->timewait_info->remote_ca_guid =
+		cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
+	cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn;
+
+	/*
+	 * Note that the ID pointer is not in the xarray at this point,
+	 * so this set is only visible to the local thread.
+	 */
+	cm_id_priv->id.state = IB_CM_REQ_RCVD;
+
+	listen_cm_id_priv = cm_match_req(work, cm_id_priv);
+	if (!listen_cm_id_priv) {
+		trace_icm_no_listener_err(&cm_id_priv->id);
+		cm_id_priv->id.state = IB_CM_IDLE;
+		ret = -EINVAL;
+		goto destroy;
+	}
+
+	memset(&work->path[0], 0, sizeof(work->path[0]));
+	if (cm_req_has_alt_path(req_msg))
+		memset(&work->path[1], 0, sizeof(work->path[1]));
+	grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr);
+	gid_attr = grh->sgid_attr;
+
+	if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) {
+		work->path[0].rec_type =
+			sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
+	} else {
+		cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
+		cm_path_set_rec_type(
+			work->port->cm_dev->ib_device, work->port->port_num,
+			&work->path[0],
+			IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID,
+					req_msg));
+	}
+	if (cm_req_has_alt_path(req_msg))
+		work->path[1].rec_type = work->path[0].rec_type;
+	cm_format_paths_from_req(req_msg, &work->path[0],
+				 &work->path[1], work->mad_recv_wc->wc);
+	if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE)
+		sa_path_set_dmac(&work->path[0],
+				 cm_id_priv->av.ah_attr.roce.dmac);
+	work->path[0].hop_limit = grh->hop_limit;
+
+	/* This destroy call is needed to pair with cm_init_av_for_response */
+	cm_destroy_av(&cm_id_priv->av);
+	ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av);
+	if (ret) {
+		int err;
+
+		err = rdma_query_gid(work->port->cm_dev->ib_device,
+				     work->port->port_num, 0,
+				     &work->path[0].sgid);
+		if (err)
+			ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
+				       NULL, 0, NULL, 0);
+		else
+			ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
+				       &work->path[0].sgid,
+				       sizeof(work->path[0].sgid),
+				       NULL, 0);
+		goto rejected;
+	}
+	if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_IB)
+		cm_id_priv->av.dlid_datapath =
+			IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg);
+
+	if (cm_req_has_alt_path(req_msg)) {
+		ret = cm_init_av_by_path(&work->path[1], NULL,
+					 &cm_id_priv->alt_av);
+		if (ret) {
+			ib_send_cm_rej(&cm_id_priv->id,
+				       IB_CM_REJ_INVALID_ALT_GID,
+				       &work->path[0].sgid,
+				       sizeof(work->path[0].sgid), NULL, 0);
+			goto rejected;
+		}
+	}
+
+	cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
+	cm_id_priv->id.context = listen_cm_id_priv->id.context;
+	cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
+
+	/* Now MAD handlers can see the new ID */
+	spin_lock_irq(&cm_id_priv->lock);
+	cm_finalize_id(cm_id_priv);
+
+	/* Refcount belongs to the event, pairs with cm_process_work() */
+	refcount_inc(&cm_id_priv->refcount);
+	cm_queue_work_unlock(cm_id_priv, work);
+	/*
+	 * Since this ID was just created and was not made visible to other MAD
+	 * handlers until the cm_finalize_id() above we know that the
+	 * cm_process_work() will deliver the event and the listen_cm_id
+	 * embedded in the event can be derefed here.
+	 */
+	cm_deref_id(listen_cm_id_priv);
+	return 0;
+
+rejected:
+	cm_deref_id(listen_cm_id_priv);
+destroy:
+	ib_destroy_cm_id(&cm_id_priv->id);
+	return ret;
+}
+
+static void cm_format_rep(struct cm_rep_msg *rep_msg,
+			  struct cm_id_private *cm_id_priv,
+			  struct ib_cm_rep_param *param)
+{
+	cm_format_mad_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid,
+			      param->ece.attr_mod);
+	IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+	IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn);
+	IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg,
+		param->responder_resources);
+	IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg,
+		cm_id_priv->av.port->cm_dev->ack_delay);
+	IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted);
+	IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count);
+	IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg,
+		be64_to_cpu(cm_id_priv->id.device->node_guid));
+
+	if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
+		IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg,
+			param->initiator_depth);
+		IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg,
+			param->flow_control);
+		IBA_SET(CM_REP_SRQ, rep_msg, param->srq);
+		IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num);
+	} else {
+		IBA_SET(CM_REP_SRQ, rep_msg, 1);
+		IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num);
+	}
+
+	IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id);
+	IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8);
+	IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16);
+
+	if (param->private_data && param->private_data_len)
+		IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, param->private_data,
+			    param->private_data_len);
+}
+
+int ib_send_cm_rep(struct ib_cm_id *cm_id,
+		   struct ib_cm_rep_param *param)
+{
+	struct cm_id_private *cm_id_priv;
+	struct ib_mad_send_buf *msg;
+	struct cm_rep_msg *rep_msg;
+	unsigned long flags;
+	int ret;
+
+	if (param->private_data &&
+	    param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	if (cm_id->state != IB_CM_REQ_RCVD &&
+	    cm_id->state != IB_CM_MRA_REQ_SENT) {
+		trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	msg = cm_alloc_priv_msg(cm_id_priv);
+	if (IS_ERR(msg)) {
+		ret = PTR_ERR(msg);
+		goto out;
+	}
+
+	rep_msg = (struct cm_rep_msg *) msg->mad;
+	cm_format_rep(rep_msg, cm_id_priv, param);
+	msg->timeout_ms = cm_id_priv->timeout_ms;
+	msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
+
+	trace_icm_send_rep(cm_id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		goto out_free;
+
+	cm_id->state = IB_CM_REP_SENT;
+	cm_id_priv->initiator_depth = param->initiator_depth;
+	cm_id_priv->responder_resources = param->responder_resources;
+	cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
+	WARN_ONCE(param->qp_num & 0xFF000000,
+		  "IBTA declares QPN to be 24 bits, but it is 0x%X\n",
+		  param->qp_num);
+	cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return 0;
+
+out_free:
+	cm_free_priv_msg(msg);
+out:
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_rep);
+
+static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
+			  struct cm_id_private *cm_id_priv,
+			  const void *private_data,
+			  u8 private_data_len)
+{
+	cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
+	IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+
+	if (private_data && private_data_len)
+		IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, private_data,
+			    private_data_len);
+}
+
+int ib_send_cm_rtu(struct ib_cm_id *cm_id,
+		   const void *private_data,
+		   u8 private_data_len)
+{
+	struct cm_id_private *cm_id_priv;
+	struct ib_mad_send_buf *msg;
+	unsigned long flags;
+	void *data;
+	int ret;
+
+	if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	data = cm_copy_private_data(private_data, private_data_len);
+	if (IS_ERR(data))
+		return PTR_ERR(data);
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	if (cm_id->state != IB_CM_REP_RCVD &&
+	    cm_id->state != IB_CM_MRA_REP_SENT) {
+		trace_icm_send_cm_rtu_err(cm_id);
+		ret = -EINVAL;
+		goto error;
+	}
+
+	msg = cm_alloc_msg(cm_id_priv);
+	if (IS_ERR(msg)) {
+		ret = PTR_ERR(msg);
+		goto error;
+	}
+
+	cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
+		      private_data, private_data_len);
+
+	trace_icm_send_rtu(cm_id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret) {
+		spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+		cm_free_msg(msg);
+		kfree(data);
+		return ret;
+	}
+
+	cm_id->state = IB_CM_ESTABLISHED;
+	cm_set_private_data(cm_id_priv, data, private_data_len);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return 0;
+
+error:	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	kfree(data);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_rtu);
+
+static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
+{
+	struct cm_rep_msg *rep_msg;
+	struct ib_cm_rep_event_param *param;
+
+	rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
+	param = &work->cm_event.param.rep_rcvd;
+	param->remote_ca_guid =
+		cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
+	param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg);
+	param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
+	param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg);
+	param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
+	param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
+	param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
+	param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg);
+	param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg);
+	param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
+	param->srq = IBA_GET(CM_REP_SRQ, rep_msg);
+	param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16;
+	param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8;
+	param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg);
+	param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod);
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg);
+}
+
+static void cm_dup_rep_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_rep_msg *rep_msg;
+	struct ib_mad_send_buf *msg = NULL;
+	int ret;
+
+	rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)),
+		cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)));
+	if (!cm_id_priv)
+		return;
+
+	atomic_long_inc(
+		&work->port->counters[CM_RECV_DUPLICATES][CM_REP_COUNTER]);
+	ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
+	if (ret)
+		goto deref;
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
+		cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
+			      cm_id_priv->private_data,
+			      cm_id_priv->private_data_len);
+	else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
+		cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
+			      CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
+			      cm_id_priv->private_data,
+			      cm_id_priv->private_data_len);
+	else
+		goto unlock;
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	trace_icm_send_dup_rep(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		goto free;
+	goto deref;
+
+unlock:	spin_unlock_irq(&cm_id_priv->lock);
+free:	cm_free_response_msg(msg);
+deref:	cm_deref_id(cm_id_priv);
+}
+
+static int cm_rep_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_rep_msg *rep_msg;
+	int ret;
+	struct cm_id_private *cur_cm_id_priv;
+	struct cm_timewait_info *timewait_info;
+
+	rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0);
+	if (!cm_id_priv) {
+		cm_dup_rep_handler(work);
+		trace_icm_remote_no_priv_err(
+			 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
+		return -EINVAL;
+	}
+
+	cm_format_rep_event(work, cm_id_priv->qp_type);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+		break;
+	default:
+		ret = -EINVAL;
+		trace_icm_rep_unknown_err(
+			IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
+			IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg),
+			cm_id_priv->id.state);
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto error;
+	}
+
+	cm_id_priv->timewait_info->work.remote_id =
+		cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
+	cm_id_priv->timewait_info->remote_ca_guid =
+		cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
+	cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
+
+	spin_lock(&cm.lock);
+	/* Check for duplicate REP. */
+	if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
+		spin_unlock(&cm.lock);
+		spin_unlock_irq(&cm_id_priv->lock);
+		ret = -EINVAL;
+		trace_icm_insert_failed_err(
+			 IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
+		goto error;
+	}
+	/* Check for a stale connection. */
+	timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
+	if (timewait_info) {
+		cm_remove_remote(cm_id_priv);
+		cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
+					   timewait_info->work.remote_id);
+
+		spin_unlock(&cm.lock);
+		spin_unlock_irq(&cm_id_priv->lock);
+		cm_issue_rej(work->port, work->mad_recv_wc,
+			     IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
+			     NULL, 0);
+		ret = -EINVAL;
+		trace_icm_staleconn_err(
+			IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
+			IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
+
+		if (cur_cm_id_priv) {
+			ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
+			cm_deref_id(cur_cm_id_priv);
+		}
+
+		goto error;
+	}
+	spin_unlock(&cm.lock);
+
+	cm_id_priv->id.state = IB_CM_REP_RCVD;
+	cm_id_priv->id.remote_id =
+		cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
+	cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
+	cm_id_priv->initiator_depth =
+		IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
+	cm_id_priv->responder_resources =
+		IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
+	cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
+	cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
+	cm_id_priv->target_ack_delay =
+		IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
+	cm_id_priv->av.timeout =
+			cm_ack_timeout(cm_id_priv->target_ack_delay,
+				       cm_id_priv->av.timeout - 1);
+	cm_id_priv->alt_av.timeout =
+			cm_ack_timeout(cm_id_priv->target_ack_delay,
+				       cm_id_priv->alt_av.timeout - 1);
+
+	ib_cancel_mad(cm_id_priv->msg);
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+
+error:
+	cm_deref_id(cm_id_priv);
+	return ret;
+}
+
+static int cm_establish_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+
+	/* See comment in cm_establish about lookup. */
+	cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+
+	ib_cancel_mad(cm_id_priv->msg);
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static int cm_rtu_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_rtu_msg *rtu_msg;
+
+	rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)),
+		cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg)));
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_REP_SENT &&
+	    cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_RTU_COUNTER]);
+		goto out;
+	}
+	cm_id_priv->id.state = IB_CM_ESTABLISHED;
+
+	ib_cancel_mad(cm_id_priv->msg);
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
+			  struct cm_id_private *cm_id_priv,
+			  const void *private_data,
+			  u8 private_data_len)
+{
+	cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
+			  cm_form_tid(cm_id_priv));
+	IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+	IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg,
+		be32_to_cpu(cm_id_priv->remote_qpn));
+
+	if (private_data && private_data_len)
+		IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data,
+			    private_data_len);
+}
+
+static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
+			       const void *private_data, u8 private_data_len)
+{
+	struct ib_mad_send_buf *msg;
+	int ret;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
+		trace_icm_dreq_skipped(&cm_id_priv->id);
+		return -EINVAL;
+	}
+
+	if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
+	    cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
+		ib_cancel_mad(cm_id_priv->msg);
+
+	msg = cm_alloc_priv_msg(cm_id_priv);
+	if (IS_ERR(msg)) {
+		cm_enter_timewait(cm_id_priv);
+		return PTR_ERR(msg);
+	}
+
+	cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
+		       private_data, private_data_len);
+	msg->timeout_ms = cm_id_priv->timeout_ms;
+	msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
+
+	trace_icm_send_dreq(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret) {
+		cm_enter_timewait(cm_id_priv);
+		cm_free_priv_msg(msg);
+		return ret;
+	}
+
+	cm_id_priv->id.state = IB_CM_DREQ_SENT;
+	return 0;
+}
+
+int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data,
+		    u8 private_data_len)
+{
+	struct cm_id_private *cm_id_priv =
+		container_of(cm_id, struct cm_id_private, id);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	ret = cm_send_dreq_locked(cm_id_priv, private_data, private_data_len);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_dreq);
+
+static void cm_format_drep(struct cm_drep_msg *drep_msg,
+			  struct cm_id_private *cm_id_priv,
+			  const void *private_data,
+			  u8 private_data_len)
+{
+	cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
+	IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+
+	if (private_data && private_data_len)
+		IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data,
+			    private_data_len);
+}
+
+static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
+			       void *private_data, u8 private_data_len)
+{
+	struct ib_mad_send_buf *msg;
+	int ret;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
+		trace_icm_send_drep_err(&cm_id_priv->id);
+		kfree(private_data);
+		return -EINVAL;
+	}
+
+	cm_set_private_data(cm_id_priv, private_data, private_data_len);
+	cm_enter_timewait(cm_id_priv);
+
+	msg = cm_alloc_msg(cm_id_priv);
+	if (IS_ERR(msg))
+		return PTR_ERR(msg);
+
+	cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
+		       private_data, private_data_len);
+
+	trace_icm_send_drep(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret) {
+		cm_free_msg(msg);
+		return ret;
+	}
+	return 0;
+}
+
+int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data,
+		    u8 private_data_len)
+{
+	struct cm_id_private *cm_id_priv =
+		container_of(cm_id, struct cm_id_private, id);
+	unsigned long flags;
+	void *data;
+	int ret;
+
+	data = cm_copy_private_data(private_data, private_data_len);
+	if (IS_ERR(data))
+		return PTR_ERR(data);
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	ret = cm_send_drep_locked(cm_id_priv, data, private_data_len);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_drep);
+
+static int cm_issue_drep(struct cm_port *port,
+			 struct ib_mad_recv_wc *mad_recv_wc)
+{
+	struct ib_mad_send_buf *msg = NULL;
+	struct cm_dreq_msg *dreq_msg;
+	struct cm_drep_msg *drep_msg;
+	int ret;
+
+	ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
+	if (ret)
+		return ret;
+
+	dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
+	drep_msg = (struct cm_drep_msg *) msg->mad;
+
+	cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
+	IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
+		IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg));
+	IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
+		IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
+
+	trace_icm_issue_drep(
+		IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
+		IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		cm_free_response_msg(msg);
+
+	return ret;
+}
+
+static int cm_dreq_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_dreq_msg *dreq_msg;
+	struct ib_mad_send_buf *msg = NULL;
+
+	dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)),
+		cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)));
+	if (!cm_id_priv) {
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_DREQ_COUNTER]);
+		cm_issue_drep(work->port, work->mad_recv_wc);
+		trace_icm_no_priv_err(
+			IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
+			IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
+		return -EINVAL;
+	}
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->local_qpn !=
+	    cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg)))
+		goto unlock;
+
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REP_SENT:
+	case IB_CM_DREQ_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		ib_cancel_mad(cm_id_priv->msg);
+		break;
+	case IB_CM_ESTABLISHED:
+		if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
+		    cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
+			ib_cancel_mad(cm_id_priv->msg);
+		break;
+	case IB_CM_TIMEWAIT:
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_DREQ_COUNTER]);
+		msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
+		if (IS_ERR(msg))
+			goto unlock;
+
+		cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
+			       cm_id_priv->private_data,
+			       cm_id_priv->private_data_len);
+		spin_unlock_irq(&cm_id_priv->lock);
+
+		if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
+		    ib_post_send_mad(msg, NULL))
+			cm_free_response_msg(msg);
+		goto deref;
+	case IB_CM_DREQ_RCVD:
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_DREQ_COUNTER]);
+		goto unlock;
+	default:
+		trace_icm_dreq_unknown_err(&cm_id_priv->id);
+		goto unlock;
+	}
+	cm_id_priv->id.state = IB_CM_DREQ_RCVD;
+	cm_id_priv->tid = dreq_msg->hdr.tid;
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+
+unlock:	spin_unlock_irq(&cm_id_priv->lock);
+deref:	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static int cm_drep_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_drep_msg *drep_msg;
+
+	drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)),
+		cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg)));
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
+	    cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+	cm_enter_timewait(cm_id_priv);
+
+	ib_cancel_mad(cm_id_priv->msg);
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
+			      enum ib_cm_rej_reason reason, void *ari,
+			      u8 ari_length, const void *private_data,
+			      u8 private_data_len)
+{
+	enum ib_cm_state state = cm_id_priv->id.state;
+	struct ib_mad_send_buf *msg;
+	int ret;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
+	    (ari && ari_length > IB_CM_REJ_ARI_LENGTH))
+		return -EINVAL;
+
+	trace_icm_send_rej(&cm_id_priv->id, reason);
+
+	switch (state) {
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+	case IB_CM_REQ_RCVD:
+	case IB_CM_MRA_REQ_SENT:
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+		cm_reset_to_idle(cm_id_priv);
+		msg = cm_alloc_msg(cm_id_priv);
+		if (IS_ERR(msg))
+			return PTR_ERR(msg);
+		cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
+			      ari, ari_length, private_data, private_data_len,
+			      state);
+		break;
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		cm_enter_timewait(cm_id_priv);
+		msg = cm_alloc_msg(cm_id_priv);
+		if (IS_ERR(msg))
+			return PTR_ERR(msg);
+		cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
+			      ari, ari_length, private_data, private_data_len,
+			      state);
+		break;
+	default:
+		trace_icm_send_unknown_rej_err(&cm_id_priv->id);
+		return -EINVAL;
+	}
+
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret) {
+		cm_free_msg(msg);
+		return ret;
+	}
+
+	return 0;
+}
+
+int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason,
+		   void *ari, u8 ari_length, const void *private_data,
+		   u8 private_data_len)
+{
+	struct cm_id_private *cm_id_priv =
+		container_of(cm_id, struct cm_id_private, id);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length,
+				 private_data, private_data_len);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_rej);
+
+static void cm_format_rej_event(struct cm_work *work)
+{
+	struct cm_rej_msg *rej_msg;
+	struct ib_cm_rej_event_param *param;
+
+	rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
+	param = &work->cm_event.param.rej_rcvd;
+	param->ari = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg);
+	param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg);
+	param->reason = IBA_GET(CM_REJ_REASON, rej_msg);
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg);
+}
+
+static struct cm_id_private *cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
+{
+	struct cm_id_private *cm_id_priv;
+	__be32 remote_id;
+
+	remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg));
+
+	if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) {
+		cm_id_priv = cm_find_remote_id(
+			*((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)),
+			remote_id);
+	} else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) ==
+		   CM_MSG_RESPONSE_REQ)
+		cm_id_priv = cm_acquire_id(
+			cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
+			0);
+	else
+		cm_id_priv = cm_acquire_id(
+			cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
+			remote_id);
+
+	return cm_id_priv;
+}
+
+static int cm_rej_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_rej_msg *rej_msg;
+
+	rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_rejected_id(rej_msg);
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	cm_format_rej_event(work);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		ib_cancel_mad(cm_id_priv->msg);
+		fallthrough;
+	case IB_CM_REQ_RCVD:
+	case IB_CM_MRA_REQ_SENT:
+		if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN)
+			cm_enter_timewait(cm_id_priv);
+		else
+			cm_reset_to_idle(cm_id_priv);
+		break;
+	case IB_CM_DREQ_SENT:
+		ib_cancel_mad(cm_id_priv->msg);
+		fallthrough;
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+		cm_enter_timewait(cm_id_priv);
+		break;
+	case IB_CM_ESTABLISHED:
+		if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
+		    cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
+			if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
+				ib_cancel_mad(cm_id_priv->msg);
+			cm_enter_timewait(cm_id_priv);
+			break;
+		}
+		fallthrough;
+	default:
+		trace_icm_rej_unknown_err(&cm_id_priv->id);
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+int ib_send_cm_mra(struct ib_cm_id *cm_id,
+		   u8 service_timeout,
+		   const void *private_data,
+		   u8 private_data_len)
+{
+	struct cm_id_private *cm_id_priv;
+	struct ib_mad_send_buf *msg;
+	enum ib_cm_state cm_state;
+	enum ib_cm_lap_state lap_state;
+	enum cm_msg_response msg_response;
+	void *data;
+	unsigned long flags;
+	int ret;
+
+	if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
+		return -EINVAL;
+
+	data = cm_copy_private_data(private_data, private_data_len);
+	if (IS_ERR(data))
+		return PTR_ERR(data);
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_RCVD:
+		cm_state = IB_CM_MRA_REQ_SENT;
+		lap_state = cm_id->lap_state;
+		msg_response = CM_MSG_RESPONSE_REQ;
+		break;
+	case IB_CM_REP_RCVD:
+		cm_state = IB_CM_MRA_REP_SENT;
+		lap_state = cm_id->lap_state;
+		msg_response = CM_MSG_RESPONSE_REP;
+		break;
+	case IB_CM_ESTABLISHED:
+		if (cm_id->lap_state == IB_CM_LAP_RCVD) {
+			cm_state = cm_id->state;
+			lap_state = IB_CM_MRA_LAP_SENT;
+			msg_response = CM_MSG_RESPONSE_OTHER;
+			break;
+		}
+		fallthrough;
+	default:
+		trace_icm_send_mra_unknown_err(&cm_id_priv->id);
+		ret = -EINVAL;
+		goto error_unlock;
+	}
+
+	if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
+		msg = cm_alloc_msg(cm_id_priv);
+		if (IS_ERR(msg)) {
+			ret = PTR_ERR(msg);
+			goto error_unlock;
+		}
+
+		cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
+			      msg_response, service_timeout,
+			      private_data, private_data_len);
+		trace_icm_send_mra(cm_id);
+		ret = ib_post_send_mad(msg, NULL);
+		if (ret)
+			goto error_free_msg;
+	}
+
+	cm_id->state = cm_state;
+	cm_id->lap_state = lap_state;
+	cm_id_priv->service_timeout = service_timeout;
+	cm_set_private_data(cm_id_priv, data, private_data_len);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return 0;
+
+error_free_msg:
+	cm_free_msg(msg);
+error_unlock:
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	kfree(data);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_mra);
+
+static struct cm_id_private *cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
+{
+	switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) {
+	case CM_MSG_RESPONSE_REQ:
+		return cm_acquire_id(
+			cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
+			0);
+	case CM_MSG_RESPONSE_REP:
+	case CM_MSG_RESPONSE_OTHER:
+		return cm_acquire_id(
+			cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
+			cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg)));
+	default:
+		return NULL;
+	}
+}
+
+static int cm_mra_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_mra_msg *mra_msg;
+	int timeout;
+
+	mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_mraed_id(mra_msg);
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg);
+	work->cm_event.param.mra_rcvd.service_timeout =
+		IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg);
+	timeout = cm_convert_to_ms(IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg)) +
+		  cm_convert_to_ms(cm_id_priv->av.timeout);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_SENT:
+		if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
+			    CM_MSG_RESPONSE_REQ ||
+		    ib_modify_mad(cm_id_priv->msg, timeout))
+			goto out;
+		cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
+		break;
+	case IB_CM_REP_SENT:
+		if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
+			    CM_MSG_RESPONSE_REP ||
+		    ib_modify_mad(cm_id_priv->msg, timeout))
+			goto out;
+		cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
+		break;
+	case IB_CM_ESTABLISHED:
+		if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
+			    CM_MSG_RESPONSE_OTHER ||
+		    cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
+		    ib_modify_mad(cm_id_priv->msg, timeout)) {
+			if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
+				atomic_long_inc(
+					&work->port->counters[CM_RECV_DUPLICATES]
+							     [CM_MRA_COUNTER]);
+			goto out;
+		}
+		cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
+		break;
+	case IB_CM_MRA_REQ_RCVD:
+	case IB_CM_MRA_REP_RCVD:
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_MRA_COUNTER]);
+		fallthrough;
+	default:
+		trace_icm_mra_unknown_err(&cm_id_priv->id);
+		goto out;
+	}
+
+	cm_id_priv->msg->context[1] = (void *) (unsigned long)
+				      cm_id_priv->id.state;
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	spin_unlock_irq(&cm_id_priv->lock);
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg,
+					struct sa_path_rec *path)
+{
+	u32 lid;
+
+	if (path->rec_type != SA_PATH_REC_TYPE_OPA) {
+		sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID,
+					       lap_msg));
+		sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID,
+					       lap_msg));
+	} else {
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg));
+		sa_path_set_dlid(path, lid);
+
+		lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
+			CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg));
+		sa_path_set_slid(path, lid);
+	}
+}
+
+static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
+				    struct sa_path_rec *path,
+				    struct cm_lap_msg *lap_msg)
+{
+	path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg);
+	path->sgid =
+		*IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg);
+	path->flow_label =
+		cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg));
+	path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg);
+	path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg);
+	path->reversible = 1;
+	path->pkey = cm_id_priv->pkey;
+	path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg);
+	path->mtu_selector = IB_SA_EQ;
+	path->mtu = cm_id_priv->path_mtu;
+	path->rate_selector = IB_SA_EQ;
+	path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg);
+	path->packet_life_time_selector = IB_SA_EQ;
+	path->packet_life_time =
+		IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg);
+	path->packet_life_time -= (path->packet_life_time > 0);
+	cm_format_path_lid_from_lap(lap_msg, path);
+}
+
+static int cm_lap_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_lap_msg *lap_msg;
+	struct ib_cm_lap_event_param *param;
+	struct ib_mad_send_buf *msg = NULL;
+	struct rdma_ah_attr ah_attr;
+	struct cm_av alt_av = {};
+	int ret;
+
+	/* Currently Alternate path messages are not supported for
+	 * RoCE link layer.
+	 */
+	if (rdma_protocol_roce(work->port->cm_dev->ib_device,
+			       work->port->port_num))
+		return -EINVAL;
+
+	/* todo: verify LAP request and send reject APR if invalid. */
+	lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)),
+		cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg)));
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	param = &work->cm_event.param.lap_rcvd;
+	memset(&work->path[0], 0, sizeof(work->path[1]));
+	cm_path_set_rec_type(work->port->cm_dev->ib_device,
+			     work->port->port_num, &work->path[0],
+			     IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID,
+					     lap_msg));
+	param->alternate_path = &work->path[0];
+	cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg);
+
+	ret = ib_init_ah_attr_from_wc(work->port->cm_dev->ib_device,
+				      work->port->port_num,
+				      work->mad_recv_wc->wc,
+				      work->mad_recv_wc->recv_buf.grh,
+				      &ah_attr);
+	if (ret)
+		goto deref;
+
+	ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av);
+	if (ret) {
+		rdma_destroy_ah_attr(&ah_attr);
+		goto deref;
+	}
+
+	spin_lock_irq(&cm_id_priv->lock);
+	cm_init_av_for_lap(work->port, work->mad_recv_wc->wc,
+			   &ah_attr, &cm_id_priv->av);
+	cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
+
+	if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
+		goto unlock;
+
+	switch (cm_id_priv->id.lap_state) {
+	case IB_CM_LAP_UNINIT:
+	case IB_CM_LAP_IDLE:
+		break;
+	case IB_CM_MRA_LAP_SENT:
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_LAP_COUNTER]);
+		msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
+		if (IS_ERR(msg))
+			goto unlock;
+
+		cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
+			      CM_MSG_RESPONSE_OTHER,
+			      cm_id_priv->service_timeout,
+			      cm_id_priv->private_data,
+			      cm_id_priv->private_data_len);
+		spin_unlock_irq(&cm_id_priv->lock);
+
+		if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
+		    ib_post_send_mad(msg, NULL))
+			cm_free_response_msg(msg);
+		goto deref;
+	case IB_CM_LAP_RCVD:
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_LAP_COUNTER]);
+		goto unlock;
+	default:
+		goto unlock;
+	}
+
+	cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
+	cm_id_priv->tid = lap_msg->hdr.tid;
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+
+unlock:	spin_unlock_irq(&cm_id_priv->lock);
+deref:	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static int cm_apr_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_apr_msg *apr_msg;
+
+	/* Currently Alternate path messages are not supported for
+	 * RoCE link layer.
+	 */
+	if (rdma_protocol_roce(work->port->cm_dev->ib_device,
+			       work->port->port_num))
+		return -EINVAL;
+
+	apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)),
+		cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg)));
+	if (!cm_id_priv)
+		return -EINVAL; /* Unmatched reply. */
+
+	work->cm_event.param.apr_rcvd.ap_status =
+		IBA_GET(CM_APR_AR_STATUS, apr_msg);
+	work->cm_event.param.apr_rcvd.apr_info =
+		IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg);
+	work->cm_event.param.apr_rcvd.info_len =
+		IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg);
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg);
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
+	    (cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
+	     cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+	cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
+	ib_cancel_mad(cm_id_priv->msg);
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static int cm_timewait_handler(struct cm_work *work)
+{
+	struct cm_timewait_info *timewait_info;
+	struct cm_id_private *cm_id_priv;
+
+	timewait_info = container_of(work, struct cm_timewait_info, work);
+	spin_lock_irq(&cm.lock);
+	list_del(&timewait_info->list);
+	spin_unlock_irq(&cm.lock);
+
+	cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
+				   timewait_info->work.remote_id);
+	if (!cm_id_priv)
+		return -EINVAL;
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
+	    cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+	cm_id_priv->id.state = IB_CM_IDLE;
+	cm_queue_work_unlock(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
+			       struct cm_id_private *cm_id_priv,
+			       struct ib_cm_sidr_req_param *param)
+{
+	cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
+			  cm_form_tid(cm_id_priv));
+	IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg,
+		be32_to_cpu(cm_id_priv->id.local_id));
+	IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg,
+		be16_to_cpu(param->path->pkey));
+	IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg,
+		be64_to_cpu(param->service_id));
+
+	if (param->private_data && param->private_data_len)
+		IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg,
+			    param->private_data, param->private_data_len);
+}
+
+int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
+			struct ib_cm_sidr_req_param *param)
+{
+	struct cm_id_private *cm_id_priv;
+	struct ib_mad_send_buf *msg;
+	struct cm_av av = {};
+	unsigned long flags;
+	int ret;
+
+	if (!param->path || (param->private_data &&
+	     param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
+		return -EINVAL;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	ret = cm_init_av_by_path(param->path, param->sgid_attr, &av);
+	if (ret)
+		return ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	cm_move_av_from_path(&cm_id_priv->av, &av);
+	cm_id->service_id = param->service_id;
+	cm_id_priv->timeout_ms = param->timeout_ms;
+	cm_id_priv->max_cm_retries = param->max_cm_retries;
+	if (cm_id->state != IB_CM_IDLE) {
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	msg = cm_alloc_priv_msg(cm_id_priv);
+	if (IS_ERR(msg)) {
+		ret = PTR_ERR(msg);
+		goto out_unlock;
+	}
+
+	cm_format_sidr_req((struct cm_sidr_req_msg *)msg->mad, cm_id_priv,
+			   param);
+	msg->timeout_ms = cm_id_priv->timeout_ms;
+	msg->context[1] = (void *)(unsigned long)IB_CM_SIDR_REQ_SENT;
+
+	trace_icm_send_sidr_req(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret)
+		goto out_free;
+	cm_id->state = IB_CM_SIDR_REQ_SENT;
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return 0;
+out_free:
+	cm_free_priv_msg(msg);
+out_unlock:
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_sidr_req);
+
+static void cm_format_sidr_req_event(struct cm_work *work,
+				     const struct cm_id_private *rx_cm_id,
+				     struct ib_cm_id *listen_id)
+{
+	struct cm_sidr_req_msg *sidr_req_msg;
+	struct ib_cm_sidr_req_event_param *param;
+
+	sidr_req_msg = (struct cm_sidr_req_msg *)
+				work->mad_recv_wc->recv_buf.mad;
+	param = &work->cm_event.param.sidr_req_rcvd;
+	param->pkey = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg);
+	param->listen_id = listen_id;
+	param->service_id =
+		cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
+	param->bth_pkey = cm_get_bth_pkey(work);
+	param->port = work->port->port_num;
+	param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr;
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg);
+}
+
+static int cm_sidr_req_handler(struct cm_work *work)
+{
+	struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
+	struct cm_sidr_req_msg *sidr_req_msg;
+	struct ib_wc *wc;
+	int ret;
+
+	cm_id_priv =
+		cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
+	if (IS_ERR(cm_id_priv))
+		return PTR_ERR(cm_id_priv);
+
+	/* Record SGID/SLID and request ID for lookup. */
+	sidr_req_msg = (struct cm_sidr_req_msg *)
+				work->mad_recv_wc->recv_buf.mad;
+
+	cm_id_priv->id.remote_id =
+		cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg));
+	cm_id_priv->id.service_id =
+		cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
+	cm_id_priv->tid = sidr_req_msg->hdr.tid;
+
+	wc = work->mad_recv_wc->wc;
+	cm_id_priv->sidr_slid = wc->slid;
+	ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
+				      work->mad_recv_wc->recv_buf.grh,
+				      &cm_id_priv->av);
+	if (ret)
+		goto out;
+
+	spin_lock_irq(&cm.lock);
+	listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
+	if (listen_cm_id_priv) {
+		spin_unlock_irq(&cm.lock);
+		atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
+						     [CM_SIDR_REQ_COUNTER]);
+		goto out; /* Duplicate message. */
+	}
+	cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
+	listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
+					   cm_id_priv->id.service_id);
+	if (!listen_cm_id_priv) {
+		spin_unlock_irq(&cm.lock);
+		ib_send_cm_sidr_rep(&cm_id_priv->id,
+				    &(struct ib_cm_sidr_rep_param){
+					    .status = IB_SIDR_UNSUPPORTED });
+		goto out; /* No match. */
+	}
+	spin_unlock_irq(&cm.lock);
+
+	cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
+	cm_id_priv->id.context = listen_cm_id_priv->id.context;
+
+	/*
+	 * A SIDR ID does not need to be in the xarray since it does not receive
+	 * mads, is not placed in the remote_id or remote_qpn rbtree, and does
+	 * not enter timewait.
+	 */
+
+	cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
+	ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
+	cm_free_work(work);
+	/*
+	 * A pointer to the listen_cm_id is held in the event, so this deref
+	 * must be after the event is delivered above.
+	 */
+	cm_deref_id(listen_cm_id_priv);
+	if (ret)
+		cm_destroy_id(&cm_id_priv->id, ret);
+	return 0;
+out:
+	ib_destroy_cm_id(&cm_id_priv->id);
+	return -EINVAL;
+}
+
+static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
+			       struct cm_id_private *cm_id_priv,
+			       struct ib_cm_sidr_rep_param *param)
+{
+	cm_format_mad_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
+			      cm_id_priv->tid, param->ece.attr_mod);
+	IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg,
+		be32_to_cpu(cm_id_priv->id.remote_id));
+	IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status);
+	IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num);
+	IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg,
+		be64_to_cpu(cm_id_priv->id.service_id));
+	IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey);
+	IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg,
+		param->ece.vendor_id & 0xFF);
+	IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg,
+		(param->ece.vendor_id >> 8) & 0xFF);
+
+	if (param->info && param->info_length)
+		IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg,
+			    param->info, param->info_length);
+
+	if (param->private_data && param->private_data_len)
+		IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg,
+			    param->private_data, param->private_data_len);
+}
+
+static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
+				   struct ib_cm_sidr_rep_param *param)
+{
+	struct ib_mad_send_buf *msg;
+	unsigned long flags;
+	int ret;
+
+	lockdep_assert_held(&cm_id_priv->lock);
+
+	if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
+	    (param->private_data &&
+	     param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
+		return -EINVAL;
+
+	if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD)
+		return -EINVAL;
+
+	msg = cm_alloc_msg(cm_id_priv);
+	if (IS_ERR(msg))
+		return PTR_ERR(msg);
+
+	cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
+			   param);
+	trace_icm_send_sidr_rep(&cm_id_priv->id);
+	ret = ib_post_send_mad(msg, NULL);
+	if (ret) {
+		cm_free_msg(msg);
+		return ret;
+	}
+	cm_id_priv->id.state = IB_CM_IDLE;
+	spin_lock_irqsave(&cm.lock, flags);
+	if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) {
+		rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
+		RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
+	}
+	spin_unlock_irqrestore(&cm.lock, flags);
+	return 0;
+}
+
+int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
+			struct ib_cm_sidr_rep_param *param)
+{
+	struct cm_id_private *cm_id_priv =
+		container_of(cm_id, struct cm_id_private, id);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	ret = cm_send_sidr_rep_locked(cm_id_priv, param);
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(ib_send_cm_sidr_rep);
+
+static void cm_format_sidr_rep_event(struct cm_work *work,
+				     const struct cm_id_private *cm_id_priv)
+{
+	struct cm_sidr_rep_msg *sidr_rep_msg;
+	struct ib_cm_sidr_rep_event_param *param;
+
+	sidr_rep_msg = (struct cm_sidr_rep_msg *)
+				work->mad_recv_wc->recv_buf.mad;
+	param = &work->cm_event.param.sidr_rep_rcvd;
+	param->status = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg);
+	param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg);
+	param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg);
+	param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION,
+				      sidr_rep_msg);
+	param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH,
+				  sidr_rep_msg);
+	param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
+	work->cm_event.private_data =
+		IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg);
+}
+
+static int cm_sidr_rep_handler(struct cm_work *work)
+{
+	struct cm_sidr_rep_msg *sidr_rep_msg;
+	struct cm_id_private *cm_id_priv;
+
+	sidr_rep_msg = (struct cm_sidr_rep_msg *)
+				work->mad_recv_wc->recv_buf.mad;
+	cm_id_priv = cm_acquire_id(
+		cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 0);
+	if (!cm_id_priv)
+		return -EINVAL; /* Unmatched reply. */
+
+	spin_lock_irq(&cm_id_priv->lock);
+	if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		goto out;
+	}
+	cm_id_priv->id.state = IB_CM_IDLE;
+	ib_cancel_mad(cm_id_priv->msg);
+	spin_unlock_irq(&cm_id_priv->lock);
+
+	cm_format_sidr_rep_event(work, cm_id_priv);
+	cm_process_work(cm_id_priv, work);
+	return 0;
+out:
+	cm_deref_id(cm_id_priv);
+	return -EINVAL;
+}
+
+static void cm_process_send_error(struct cm_id_private *cm_id_priv,
+				  struct ib_mad_send_buf *msg,
+				  enum ib_cm_state state,
+				  enum ib_wc_status wc_status)
+{
+	struct ib_cm_event cm_event = {};
+	int ret;
+
+	/* Discard old sends or ones without a response. */
+	spin_lock_irq(&cm_id_priv->lock);
+	if (msg != cm_id_priv->msg) {
+		spin_unlock_irq(&cm_id_priv->lock);
+		cm_free_msg(msg);
+		return;
+	}
+	cm_free_priv_msg(msg);
+
+	if (state != cm_id_priv->id.state || wc_status == IB_WC_SUCCESS ||
+	    wc_status == IB_WC_WR_FLUSH_ERR)
+		goto out_unlock;
+
+	trace_icm_mad_send_err(state, wc_status);
+	switch (state) {
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+		cm_reset_to_idle(cm_id_priv);
+		cm_event.event = IB_CM_REQ_ERROR;
+		break;
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		cm_reset_to_idle(cm_id_priv);
+		cm_event.event = IB_CM_REP_ERROR;
+		break;
+	case IB_CM_DREQ_SENT:
+		cm_enter_timewait(cm_id_priv);
+		cm_event.event = IB_CM_DREQ_ERROR;
+		break;
+	case IB_CM_SIDR_REQ_SENT:
+		cm_id_priv->id.state = IB_CM_IDLE;
+		cm_event.event = IB_CM_SIDR_REQ_ERROR;
+		break;
+	default:
+		goto out_unlock;
+	}
+	spin_unlock_irq(&cm_id_priv->lock);
+	cm_event.param.send_status = wc_status;
+
+	/* No other events can occur on the cm_id at this point. */
+	ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
+	if (ret)
+		ib_destroy_cm_id(&cm_id_priv->id);
+	return;
+out_unlock:
+	spin_unlock_irq(&cm_id_priv->lock);
+}
+
+static void cm_send_handler(struct ib_mad_agent *mad_agent,
+			    struct ib_mad_send_wc *mad_send_wc)
+{
+	struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
+	struct cm_id_private *cm_id_priv = msg->context[0];
+	enum ib_cm_state state =
+		(enum ib_cm_state)(unsigned long)msg->context[1];
+	struct cm_port *port;
+	u16 attr_index;
+
+	port = mad_agent->context;
+	attr_index = be16_to_cpu(((struct ib_mad_hdr *)
+				  msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
+
+	/*
+	 * If the send was in response to a received message (context[0] is not
+	 * set to a cm_id), and is not a REJ, then it is a send that was
+	 * manually retried.
+	 */
+	if (!cm_id_priv && (attr_index != CM_REJ_COUNTER))
+		msg->retries = 1;
+
+	atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]);
+	if (msg->retries)
+		atomic_long_add(msg->retries,
+				&port->counters[CM_XMIT_RETRIES][attr_index]);
+
+	if (cm_id_priv)
+		cm_process_send_error(cm_id_priv, msg, state,
+				      mad_send_wc->status);
+	else
+		cm_free_response_msg(msg);
+}
+
+static void cm_work_handler(struct work_struct *_work)
+{
+	struct cm_work *work = container_of(_work, struct cm_work, work.work);
+	int ret;
+
+	switch (work->cm_event.event) {
+	case IB_CM_REQ_RECEIVED:
+		ret = cm_req_handler(work);
+		break;
+	case IB_CM_MRA_RECEIVED:
+		ret = cm_mra_handler(work);
+		break;
+	case IB_CM_REJ_RECEIVED:
+		ret = cm_rej_handler(work);
+		break;
+	case IB_CM_REP_RECEIVED:
+		ret = cm_rep_handler(work);
+		break;
+	case IB_CM_RTU_RECEIVED:
+		ret = cm_rtu_handler(work);
+		break;
+	case IB_CM_USER_ESTABLISHED:
+		ret = cm_establish_handler(work);
+		break;
+	case IB_CM_DREQ_RECEIVED:
+		ret = cm_dreq_handler(work);
+		break;
+	case IB_CM_DREP_RECEIVED:
+		ret = cm_drep_handler(work);
+		break;
+	case IB_CM_SIDR_REQ_RECEIVED:
+		ret = cm_sidr_req_handler(work);
+		break;
+	case IB_CM_SIDR_REP_RECEIVED:
+		ret = cm_sidr_rep_handler(work);
+		break;
+	case IB_CM_LAP_RECEIVED:
+		ret = cm_lap_handler(work);
+		break;
+	case IB_CM_APR_RECEIVED:
+		ret = cm_apr_handler(work);
+		break;
+	case IB_CM_TIMEWAIT_EXIT:
+		ret = cm_timewait_handler(work);
+		break;
+	default:
+		trace_icm_handler_err(work->cm_event.event);
+		ret = -EINVAL;
+		break;
+	}
+	if (ret)
+		cm_free_work(work);
+}
+
+static int cm_establish(struct ib_cm_id *cm_id)
+{
+	struct cm_id_private *cm_id_priv;
+	struct cm_work *work;
+	unsigned long flags;
+	int ret = 0;
+	struct cm_device *cm_dev;
+
+	cm_dev = ib_get_client_data(cm_id->device, &cm_client);
+	if (!cm_dev)
+		return -ENODEV;
+
+	work = kmalloc(sizeof *work, GFP_ATOMIC);
+	if (!work)
+		return -ENOMEM;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	switch (cm_id->state) {
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+		cm_id->state = IB_CM_ESTABLISHED;
+		break;
+	case IB_CM_ESTABLISHED:
+		ret = -EISCONN;
+		break;
+	default:
+		trace_icm_establish_err(cm_id);
+		ret = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+
+	if (ret) {
+		kfree(work);
+		goto out;
+	}
+
+	/*
+	 * The CM worker thread may try to destroy the cm_id before it
+	 * can execute this work item.  To prevent potential deadlock,
+	 * we need to find the cm_id once we're in the context of the
+	 * worker thread, rather than holding a reference on it.
+	 */
+	INIT_DELAYED_WORK(&work->work, cm_work_handler);
+	work->local_id = cm_id->local_id;
+	work->remote_id = cm_id->remote_id;
+	work->mad_recv_wc = NULL;
+	work->cm_event.event = IB_CM_USER_ESTABLISHED;
+
+	/* Check if the device started its remove_one */
+	spin_lock_irqsave(&cm.lock, flags);
+	if (!cm_dev->going_down) {
+		queue_delayed_work(cm.wq, &work->work, 0);
+	} else {
+		kfree(work);
+		ret = -ENODEV;
+	}
+	spin_unlock_irqrestore(&cm.lock, flags);
+
+out:
+	return ret;
+}
+
+static int cm_migrate(struct ib_cm_id *cm_id)
+{
+	struct cm_id_private *cm_id_priv;
+	unsigned long flags;
+	int ret = 0;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	if (cm_id->state == IB_CM_ESTABLISHED &&
+	    (cm_id->lap_state == IB_CM_LAP_UNINIT ||
+	     cm_id->lap_state == IB_CM_LAP_IDLE)) {
+		cm_id->lap_state = IB_CM_LAP_IDLE;
+		cm_id_priv->av = cm_id_priv->alt_av;
+	} else
+		ret = -EINVAL;
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+
+	return ret;
+}
+
+int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
+{
+	int ret;
+
+	switch (event) {
+	case IB_EVENT_COMM_EST:
+		ret = cm_establish(cm_id);
+		break;
+	case IB_EVENT_PATH_MIG:
+		ret = cm_migrate(cm_id);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	return ret;
+}
+EXPORT_SYMBOL(ib_cm_notify);
+
+static void cm_recv_handler(struct ib_mad_agent *mad_agent,
+			    struct ib_mad_send_buf *send_buf,
+			    struct ib_mad_recv_wc *mad_recv_wc)
+{
+	struct cm_port *port = mad_agent->context;
+	struct cm_work *work;
+	enum ib_cm_event_type event;
+	bool alt_path = false;
+	u16 attr_id;
+	int paths = 0;
+	int going_down = 0;
+
+	switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
+	case CM_REQ_ATTR_ID:
+		alt_path = cm_req_has_alt_path((struct cm_req_msg *)
+						mad_recv_wc->recv_buf.mad);
+		paths = 1 + (alt_path != 0);
+		event = IB_CM_REQ_RECEIVED;
+		break;
+	case CM_MRA_ATTR_ID:
+		event = IB_CM_MRA_RECEIVED;
+		break;
+	case CM_REJ_ATTR_ID:
+		event = IB_CM_REJ_RECEIVED;
+		break;
+	case CM_REP_ATTR_ID:
+		event = IB_CM_REP_RECEIVED;
+		break;
+	case CM_RTU_ATTR_ID:
+		event = IB_CM_RTU_RECEIVED;
+		break;
+	case CM_DREQ_ATTR_ID:
+		event = IB_CM_DREQ_RECEIVED;
+		break;
+	case CM_DREP_ATTR_ID:
+		event = IB_CM_DREP_RECEIVED;
+		break;
+	case CM_SIDR_REQ_ATTR_ID:
+		event = IB_CM_SIDR_REQ_RECEIVED;
+		break;
+	case CM_SIDR_REP_ATTR_ID:
+		event = IB_CM_SIDR_REP_RECEIVED;
+		break;
+	case CM_LAP_ATTR_ID:
+		paths = 1;
+		event = IB_CM_LAP_RECEIVED;
+		break;
+	case CM_APR_ATTR_ID:
+		event = IB_CM_APR_RECEIVED;
+		break;
+	default:
+		ib_free_recv_mad(mad_recv_wc);
+		return;
+	}
+
+	attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
+	atomic_long_inc(&port->counters[CM_RECV][attr_id - CM_ATTR_ID_OFFSET]);
+
+	work = kmalloc(struct_size(work, path, paths), GFP_KERNEL);
+	if (!work) {
+		ib_free_recv_mad(mad_recv_wc);
+		return;
+	}
+
+	INIT_DELAYED_WORK(&work->work, cm_work_handler);
+	work->cm_event.event = event;
+	work->mad_recv_wc = mad_recv_wc;
+	work->port = port;
+
+	/* Check if the device started its remove_one */
+	spin_lock_irq(&cm.lock);
+	if (!port->cm_dev->going_down)
+		queue_delayed_work(cm.wq, &work->work, 0);
+	else
+		going_down = 1;
+	spin_unlock_irq(&cm.lock);
+
+	if (going_down) {
+		kfree(work);
+		ib_free_recv_mad(mad_recv_wc);
+	}
+}
+
+static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
+				struct ib_qp_attr *qp_attr,
+				int *qp_attr_mask)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_SENT:
+	case IB_CM_MRA_REQ_RCVD:
+	case IB_CM_REQ_RCVD:
+	case IB_CM_MRA_REQ_SENT:
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+	case IB_CM_ESTABLISHED:
+		*qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
+				IB_QP_PKEY_INDEX | IB_QP_PORT;
+		qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
+		if (cm_id_priv->responder_resources)
+			qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
+						    IB_ACCESS_REMOTE_ATOMIC;
+		qp_attr->pkey_index = cm_id_priv->av.pkey_index;
+		if (cm_id_priv->av.port)
+			qp_attr->port_num = cm_id_priv->av.port->port_num;
+		ret = 0;
+		break;
+	default:
+		trace_icm_qp_init_err(&cm_id_priv->id);
+		ret = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+
+static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
+			       struct ib_qp_attr *qp_attr,
+			       int *qp_attr_mask)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	switch (cm_id_priv->id.state) {
+	case IB_CM_REQ_RCVD:
+	case IB_CM_MRA_REQ_SENT:
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+	case IB_CM_ESTABLISHED:
+		*qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
+				IB_QP_DEST_QPN | IB_QP_RQ_PSN;
+		qp_attr->ah_attr = cm_id_priv->av.ah_attr;
+		if ((qp_attr->ah_attr.type == RDMA_AH_ATTR_TYPE_IB) &&
+		    cm_id_priv->av.dlid_datapath &&
+		    (cm_id_priv->av.dlid_datapath != 0xffff))
+			qp_attr->ah_attr.ib.dlid = cm_id_priv->av.dlid_datapath;
+		qp_attr->path_mtu = cm_id_priv->path_mtu;
+		qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
+		qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
+		if (cm_id_priv->qp_type == IB_QPT_RC ||
+		    cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
+			*qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
+					 IB_QP_MIN_RNR_TIMER;
+			qp_attr->max_dest_rd_atomic =
+					cm_id_priv->responder_resources;
+			qp_attr->min_rnr_timer = 0;
+		}
+		if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr) &&
+		    cm_id_priv->alt_av.port) {
+			*qp_attr_mask |= IB_QP_ALT_PATH;
+			qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
+			qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
+			qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
+			qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
+		}
+		ret = 0;
+		break;
+	default:
+		trace_icm_qp_rtr_err(&cm_id_priv->id);
+		ret = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+
+static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
+			       struct ib_qp_attr *qp_attr,
+			       int *qp_attr_mask)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cm_id_priv->lock, flags);
+	switch (cm_id_priv->id.state) {
+	/* Allow transition to RTS before sending REP */
+	case IB_CM_REQ_RCVD:
+	case IB_CM_MRA_REQ_SENT:
+
+	case IB_CM_REP_RCVD:
+	case IB_CM_MRA_REP_SENT:
+	case IB_CM_REP_SENT:
+	case IB_CM_MRA_REP_RCVD:
+	case IB_CM_ESTABLISHED:
+		if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
+			*qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
+			qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
+			switch (cm_id_priv->qp_type) {
+			case IB_QPT_RC:
+			case IB_QPT_XRC_INI:
+				*qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
+						 IB_QP_MAX_QP_RD_ATOMIC;
+				qp_attr->retry_cnt = cm_id_priv->retry_count;
+				qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
+				qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
+				fallthrough;
+			case IB_QPT_XRC_TGT:
+				*qp_attr_mask |= IB_QP_TIMEOUT;
+				qp_attr->timeout = cm_id_priv->av.timeout;
+				break;
+			default:
+				break;
+			}
+			if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) {
+				*qp_attr_mask |= IB_QP_PATH_MIG_STATE;
+				qp_attr->path_mig_state = IB_MIG_REARM;
+			}
+		} else {
+			*qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
+			if (cm_id_priv->alt_av.port)
+				qp_attr->alt_port_num =
+					cm_id_priv->alt_av.port->port_num;
+			qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
+			qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
+			qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
+			qp_attr->path_mig_state = IB_MIG_REARM;
+		}
+		ret = 0;
+		break;
+	default:
+		trace_icm_qp_rts_err(&cm_id_priv->id);
+		ret = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&cm_id_priv->lock, flags);
+	return ret;
+}
+
+int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
+		       struct ib_qp_attr *qp_attr,
+		       int *qp_attr_mask)
+{
+	struct cm_id_private *cm_id_priv;
+	int ret;
+
+	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
+	switch (qp_attr->qp_state) {
+	case IB_QPS_INIT:
+		ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
+		break;
+	case IB_QPS_RTR:
+		ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
+		break;
+	case IB_QPS_RTS:
+		ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+EXPORT_SYMBOL(ib_cm_init_qp_attr);
+
+static ssize_t cm_show_counter(struct ib_device *ibdev, u32 port_num,
+			       struct ib_port_attribute *attr, char *buf)
+{
+	struct cm_counter_attribute *cm_attr =
+		container_of(attr, struct cm_counter_attribute, attr);
+	struct cm_device *cm_dev = ib_get_client_data(ibdev, &cm_client);
+
+	if (WARN_ON(!cm_dev))
+		return -EINVAL;
+
+	return sysfs_emit(
+		buf, "%ld\n",
+		atomic_long_read(
+			&cm_dev->port[port_num - 1]
+				 ->counters[cm_attr->group][cm_attr->index]));
+}
+
+#define CM_COUNTER_ATTR(_name, _group, _index)                                 \
+	{                                                                      \
+		.attr = __ATTR(_name, 0444, cm_show_counter, NULL),            \
+		.group = _group, .index = _index                               \
+	}
+
+#define CM_COUNTER_GROUP(_group, _name)                                        \
+	static struct cm_counter_attribute cm_counter_attr_##_group[] = {      \
+		CM_COUNTER_ATTR(req, _group, CM_REQ_COUNTER),                  \
+		CM_COUNTER_ATTR(mra, _group, CM_MRA_COUNTER),                  \
+		CM_COUNTER_ATTR(rej, _group, CM_REJ_COUNTER),                  \
+		CM_COUNTER_ATTR(rep, _group, CM_REP_COUNTER),                  \
+		CM_COUNTER_ATTR(rtu, _group, CM_RTU_COUNTER),                  \
+		CM_COUNTER_ATTR(dreq, _group, CM_DREQ_COUNTER),                \
+		CM_COUNTER_ATTR(drep, _group, CM_DREP_COUNTER),                \
+		CM_COUNTER_ATTR(sidr_req, _group, CM_SIDR_REQ_COUNTER),        \
+		CM_COUNTER_ATTR(sidr_rep, _group, CM_SIDR_REP_COUNTER),        \
+		CM_COUNTER_ATTR(lap, _group, CM_LAP_COUNTER),                  \
+		CM_COUNTER_ATTR(apr, _group, CM_APR_COUNTER),                  \
+	};                                                                     \
+	static struct attribute *cm_counter_attrs_##_group[] = {               \
+		&cm_counter_attr_##_group[0].attr.attr,                        \
+		&cm_counter_attr_##_group[1].attr.attr,                        \
+		&cm_counter_attr_##_group[2].attr.attr,                        \
+		&cm_counter_attr_##_group[3].attr.attr,                        \
+		&cm_counter_attr_##_group[4].attr.attr,                        \
+		&cm_counter_attr_##_group[5].attr.attr,                        \
+		&cm_counter_attr_##_group[6].attr.attr,                        \
+		&cm_counter_attr_##_group[7].attr.attr,                        \
+		&cm_counter_attr_##_group[8].attr.attr,                        \
+		&cm_counter_attr_##_group[9].attr.attr,                        \
+		&cm_counter_attr_##_group[10].attr.attr,                       \
+		NULL,                                                          \
+	};                                                                     \
+	static const struct attribute_group cm_counter_group_##_group = {      \
+		.name = _name,                                                 \
+		.attrs = cm_counter_attrs_##_group,                            \
+	};
+
+CM_COUNTER_GROUP(CM_XMIT, "cm_tx_msgs")
+CM_COUNTER_GROUP(CM_XMIT_RETRIES, "cm_tx_retries")
+CM_COUNTER_GROUP(CM_RECV, "cm_rx_msgs")
+CM_COUNTER_GROUP(CM_RECV_DUPLICATES, "cm_rx_duplicates")
+
+static const struct attribute_group *cm_counter_groups[] = {
+	&cm_counter_group_CM_XMIT,
+	&cm_counter_group_CM_XMIT_RETRIES,
+	&cm_counter_group_CM_RECV,
+	&cm_counter_group_CM_RECV_DUPLICATES,
+	NULL,
+};
+
+static int cm_add_one(struct ib_device *ib_device)
+{
+	struct cm_device *cm_dev;
+	struct cm_port *port;
+	struct ib_mad_reg_req reg_req = {
+		.mgmt_class = IB_MGMT_CLASS_CM,
+		.mgmt_class_version = IB_CM_CLASS_VERSION,
+	};
+	struct ib_port_modify port_modify = {
+		.set_port_cap_mask = IB_PORT_CM_SUP
+	};
+	unsigned long flags;
+	int ret;
+	int count = 0;
+	u32 i;
+
+	cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt),
+			 GFP_KERNEL);
+	if (!cm_dev)
+		return -ENOMEM;
+
+	kref_init(&cm_dev->kref);
+	spin_lock_init(&cm_dev->mad_agent_lock);
+	cm_dev->ib_device = ib_device;
+	cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
+	cm_dev->going_down = 0;
+
+	ib_set_client_data(ib_device, &cm_client, cm_dev);
+
+	set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
+	rdma_for_each_port (ib_device, i) {
+		if (!rdma_cap_ib_cm(ib_device, i))
+			continue;
+
+		port = kzalloc(sizeof *port, GFP_KERNEL);
+		if (!port) {
+			ret = -ENOMEM;
+			goto error1;
+		}
+
+		cm_dev->port[i-1] = port;
+		port->cm_dev = cm_dev;
+		port->port_num = i;
+
+		ret = ib_port_register_client_groups(ib_device, i,
+						     cm_counter_groups);
+		if (ret)
+			goto error1;
+
+		port->mad_agent = ib_register_mad_agent(ib_device, i,
+							IB_QPT_GSI,
+							&reg_req,
+							0,
+							cm_send_handler,
+							cm_recv_handler,
+							port,
+							0);
+		if (IS_ERR(port->mad_agent)) {
+			ret = PTR_ERR(port->mad_agent);
+			goto error2;
+		}
+
+		ret = ib_modify_port(ib_device, i, 0, &port_modify);
+		if (ret)
+			goto error3;
+
+		count++;
+	}
+
+	if (!count) {
+		ret = -EOPNOTSUPP;
+		goto free;
+	}
+
+	write_lock_irqsave(&cm.device_lock, flags);
+	list_add_tail(&cm_dev->list, &cm.device_list);
+	write_unlock_irqrestore(&cm.device_lock, flags);
+	return 0;
+
+error3:
+	ib_unregister_mad_agent(port->mad_agent);
+error2:
+	ib_port_unregister_client_groups(ib_device, i, cm_counter_groups);
+error1:
+	port_modify.set_port_cap_mask = 0;
+	port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
+	while (--i) {
+		if (!rdma_cap_ib_cm(ib_device, i))
+			continue;
+
+		port = cm_dev->port[i-1];
+		ib_modify_port(ib_device, port->port_num, 0, &port_modify);
+		ib_unregister_mad_agent(port->mad_agent);
+		ib_port_unregister_client_groups(ib_device, i,
+						 cm_counter_groups);
+	}
+free:
+	cm_device_put(cm_dev);
+	return ret;
+}
+
+static void cm_remove_one(struct ib_device *ib_device, void *client_data)
+{
+	struct cm_device *cm_dev = client_data;
+	struct cm_port *port;
+	struct ib_port_modify port_modify = {
+		.clr_port_cap_mask = IB_PORT_CM_SUP
+	};
+	unsigned long flags;
+	u32 i;
+
+	write_lock_irqsave(&cm.device_lock, flags);
+	list_del(&cm_dev->list);
+	write_unlock_irqrestore(&cm.device_lock, flags);
+
+	spin_lock_irq(&cm.lock);
+	cm_dev->going_down = 1;
+	spin_unlock_irq(&cm.lock);
+
+	rdma_for_each_port (ib_device, i) {
+		struct ib_mad_agent *mad_agent;
+
+		if (!rdma_cap_ib_cm(ib_device, i))
+			continue;
+
+		port = cm_dev->port[i-1];
+		mad_agent = port->mad_agent;
+		ib_modify_port(ib_device, port->port_num, 0, &port_modify);
+		/*
+		 * We flush the queue here after the going_down set, this
+		 * verify that no new works will be queued in the recv handler,
+		 * after that we can call the unregister_mad_agent
+		 */
+		flush_workqueue(cm.wq);
+		/*
+		 * The above ensures no call paths from the work are running,
+		 * the remaining paths all take the mad_agent_lock.
+		 */
+		spin_lock(&cm_dev->mad_agent_lock);
+		port->mad_agent = NULL;
+		spin_unlock(&cm_dev->mad_agent_lock);
+		ib_unregister_mad_agent(mad_agent);
+		ib_port_unregister_client_groups(ib_device, i,
+						 cm_counter_groups);
+	}
+
+	cm_device_put(cm_dev);
+}
+
+static int __init ib_cm_init(void)
+{
+	int ret;
+
+	INIT_LIST_HEAD(&cm.device_list);
+	rwlock_init(&cm.device_lock);
+	spin_lock_init(&cm.lock);
+	cm.listen_service_table = RB_ROOT;
+	cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
+	cm.remote_id_table = RB_ROOT;
+	cm.remote_qp_table = RB_ROOT;
+	cm.remote_sidr_table = RB_ROOT;
+	xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC);
+	get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
+	INIT_LIST_HEAD(&cm.timewait_list);
+
+	cm.wq = alloc_workqueue("ib_cm", 0, 1);
+	if (!cm.wq) {
+		ret = -ENOMEM;
+		goto error2;
+	}
+
+	ret = ib_register_client(&cm_client);
+	if (ret)
+		goto error3;
+
+	return 0;
+error3:
+	destroy_workqueue(cm.wq);
+error2:
+	return ret;
+}
+
+static void __exit ib_cm_cleanup(void)
+{
+	struct cm_timewait_info *timewait_info, *tmp;
+
+	spin_lock_irq(&cm.lock);
+	list_for_each_entry(timewait_info, &cm.timewait_list, list)
+		cancel_delayed_work(&timewait_info->work.work);
+	spin_unlock_irq(&cm.lock);
+
+	ib_unregister_client(&cm_client);
+	destroy_workqueue(cm.wq);
+
+	list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
+		list_del(&timewait_info->list);
+		kfree(timewait_info);
+	}
+
+	WARN_ON(!xa_empty(&cm.local_id_table));
+}
+
+module_init(ib_cm_init);
+module_exit(ib_cm_cleanup);