Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 4472 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
new file mode 100644
index 0000000000..040ba2224f
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -0,0 +1,4472 @@
+/*
+ * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/notifier.h>
+#include <linux/inetdevice.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/if_vlan.h>
+
+#include <net/neighbour.h>
+#include <net/netevent.h>
+#include <net/route.h>
+#include <net/tcp.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+
+#include <rdma/ib_addr.h>
+
+#include <libcxgb_cm.h>
+#include "iw_cxgb4.h"
+#include "clip_tbl.h"
+
+static char *states[] = {
+	"idle",
+	"listen",
+	"connecting",
+	"mpa_wait_req",
+	"mpa_req_sent",
+	"mpa_req_rcvd",
+	"mpa_rep_sent",
+	"fpdu_mode",
+	"aborting",
+	"closing",
+	"moribund",
+	"dead",
+	NULL,
+};
+
+static int nocong;
+module_param(nocong, int, 0644);
+MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
+
+static int enable_ecn;
+module_param(enable_ecn, int, 0644);
+MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
+
+static int dack_mode;
+module_param(dack_mode, int, 0644);
+MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=0)");
+
+uint c4iw_max_read_depth = 32;
+module_param(c4iw_max_read_depth, int, 0644);
+MODULE_PARM_DESC(c4iw_max_read_depth,
+		 "Per-connection max ORD/IRD (default=32)");
+
+static int enable_tcp_timestamps;
+module_param(enable_tcp_timestamps, int, 0644);
+MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
+
+static int enable_tcp_sack;
+module_param(enable_tcp_sack, int, 0644);
+MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
+
+static int enable_tcp_window_scaling = 1;
+module_param(enable_tcp_window_scaling, int, 0644);
+MODULE_PARM_DESC(enable_tcp_window_scaling,
+		 "Enable tcp window scaling (default=1)");
+
+static int peer2peer = 1;
+module_param(peer2peer, int, 0644);
+MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
+
+static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
+module_param(p2p_type, int, 0644);
+MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
+			   "1=RDMA_READ 0=RDMA_WRITE (default 1)");
+
+static int ep_timeout_secs = 60;
+module_param(ep_timeout_secs, int, 0644);
+MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
+				   "in seconds (default=60)");
+
+static int mpa_rev = 2;
+module_param(mpa_rev, int, 0644);
+MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
+		"1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
+		" compliant (default=2)");
+
+static int markers_enabled;
+module_param(markers_enabled, int, 0644);
+MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
+
+static int crc_enabled = 1;
+module_param(crc_enabled, int, 0644);
+MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
+
+static int rcv_win = 256 * 1024;
+module_param(rcv_win, int, 0644);
+MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
+
+static int snd_win = 128 * 1024;
+module_param(snd_win, int, 0644);
+MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
+
+static struct workqueue_struct *workq;
+
+static struct sk_buff_head rxq;
+
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
+static void ep_timeout(struct timer_list *t);
+static void connect_reply_upcall(struct c4iw_ep *ep, int status);
+static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
+
+static LIST_HEAD(timeout_list);
+static DEFINE_SPINLOCK(timeout_lock);
+
+static void deref_cm_id(struct c4iw_ep_common *epc)
+{
+	epc->cm_id->rem_ref(epc->cm_id);
+	epc->cm_id = NULL;
+	set_bit(CM_ID_DEREFED, &epc->history);
+}
+
+static void ref_cm_id(struct c4iw_ep_common *epc)
+{
+	set_bit(CM_ID_REFED, &epc->history);
+	epc->cm_id->add_ref(epc->cm_id);
+}
+
+static void deref_qp(struct c4iw_ep *ep)
+{
+	c4iw_qp_rem_ref(&ep->com.qp->ibqp);
+	clear_bit(QP_REFERENCED, &ep->com.flags);
+	set_bit(QP_DEREFED, &ep->com.history);
+}
+
+static void ref_qp(struct c4iw_ep *ep)
+{
+	set_bit(QP_REFERENCED, &ep->com.flags);
+	set_bit(QP_REFED, &ep->com.history);
+	c4iw_qp_add_ref(&ep->com.qp->ibqp);
+}
+
+static void start_ep_timer(struct c4iw_ep *ep)
+{
+	pr_debug("ep %p\n", ep);
+	if (timer_pending(&ep->timer)) {
+		pr_err("%s timer already started! ep %p\n",
+		       __func__, ep);
+		return;
+	}
+	clear_bit(TIMEOUT, &ep->com.flags);
+	c4iw_get_ep(&ep->com);
+	ep->timer.expires = jiffies + ep_timeout_secs * HZ;
+	add_timer(&ep->timer);
+}
+
+static int stop_ep_timer(struct c4iw_ep *ep)
+{
+	pr_debug("ep %p stopping\n", ep);
+	del_timer_sync(&ep->timer);
+	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
+		c4iw_put_ep(&ep->com);
+		return 0;
+	}
+	return 1;
+}
+
+static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
+		  struct l2t_entry *l2e)
+{
+	int	error = 0;
+
+	if (c4iw_fatal_error(rdev)) {
+		kfree_skb(skb);
+		pr_err("%s - device in error state - dropping\n", __func__);
+		return -EIO;
+	}
+	error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
+	if (error < 0)
+		kfree_skb(skb);
+	else if (error == NET_XMIT_DROP)
+		return -ENOMEM;
+	return error < 0 ? error : 0;
+}
+
+int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
+{
+	int	error = 0;
+
+	if (c4iw_fatal_error(rdev)) {
+		kfree_skb(skb);
+		pr_err("%s - device in error state - dropping\n", __func__);
+		return -EIO;
+	}
+	error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
+	if (error < 0)
+		kfree_skb(skb);
+	return error < 0 ? error : 0;
+}
+
+static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
+{
+	u32 len = roundup(sizeof(struct cpl_tid_release), 16);
+
+	skb = get_skb(skb, len, GFP_KERNEL);
+	if (!skb)
+		return;
+
+	cxgb_mk_tid_release(skb, len, hwtid, 0);
+	c4iw_ofld_send(rdev, skb);
+	return;
+}
+
+static void set_emss(struct c4iw_ep *ep, u16 opt)
+{
+	ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
+		   ((AF_INET == ep->com.remote_addr.ss_family) ?
+		    sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
+		   sizeof(struct tcphdr);
+	ep->mss = ep->emss;
+	if (TCPOPT_TSTAMP_G(opt))
+		ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
+	if (ep->emss < 128)
+		ep->emss = 128;
+	if (ep->emss & 7)
+		pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n",
+			 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
+	pr_debug("mss_idx %u mss %u emss=%u\n", TCPOPT_MSS_G(opt), ep->mss,
+		 ep->emss);
+}
+
+static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
+{
+	enum c4iw_ep_state state;
+
+	mutex_lock(&epc->mutex);
+	state = epc->state;
+	mutex_unlock(&epc->mutex);
+	return state;
+}
+
+static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+	epc->state = new;
+}
+
+static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+	mutex_lock(&epc->mutex);
+	pr_debug("%s -> %s\n", states[epc->state], states[new]);
+	__state_set(epc, new);
+	mutex_unlock(&epc->mutex);
+	return;
+}
+
+static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
+{
+	struct sk_buff *skb;
+	unsigned int i;
+	size_t len;
+
+	len = roundup(sizeof(union cpl_wr_size), 16);
+	for (i = 0; i < size; i++) {
+		skb = alloc_skb(len, GFP_KERNEL);
+		if (!skb)
+			goto fail;
+		skb_queue_tail(ep_skb_list, skb);
+	}
+	return 0;
+fail:
+	skb_queue_purge(ep_skb_list);
+	return -ENOMEM;
+}
+
+static void *alloc_ep(int size, gfp_t gfp)
+{
+	struct c4iw_ep_common *epc;
+
+	epc = kzalloc(size, gfp);
+	if (epc) {
+		epc->wr_waitp = c4iw_alloc_wr_wait(gfp);
+		if (!epc->wr_waitp) {
+			kfree(epc);
+			epc = NULL;
+			goto out;
+		}
+		kref_init(&epc->kref);
+		mutex_init(&epc->mutex);
+		c4iw_init_wr_wait(epc->wr_waitp);
+	}
+	pr_debug("alloc ep %p\n", epc);
+out:
+	return epc;
+}
+
+static void remove_ep_tid(struct c4iw_ep *ep)
+{
+	unsigned long flags;
+
+	xa_lock_irqsave(&ep->com.dev->hwtids, flags);
+	__xa_erase(&ep->com.dev->hwtids, ep->hwtid);
+	if (xa_empty(&ep->com.dev->hwtids))
+		wake_up(&ep->com.dev->wait);
+	xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
+}
+
+static int insert_ep_tid(struct c4iw_ep *ep)
+{
+	unsigned long flags;
+	int err;
+
+	xa_lock_irqsave(&ep->com.dev->hwtids, flags);
+	err = __xa_insert(&ep->com.dev->hwtids, ep->hwtid, ep, GFP_KERNEL);
+	xa_unlock_irqrestore(&ep->com.dev->hwtids, flags);
+
+	return err;
+}
+
+/*
+ * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
+ */
+static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
+{
+	struct c4iw_ep *ep;
+	unsigned long flags;
+
+	xa_lock_irqsave(&dev->hwtids, flags);
+	ep = xa_load(&dev->hwtids, tid);
+	if (ep)
+		c4iw_get_ep(&ep->com);
+	xa_unlock_irqrestore(&dev->hwtids, flags);
+	return ep;
+}
+
+/*
+ * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
+ */
+static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
+					       unsigned int stid)
+{
+	struct c4iw_listen_ep *ep;
+	unsigned long flags;
+
+	xa_lock_irqsave(&dev->stids, flags);
+	ep = xa_load(&dev->stids, stid);
+	if (ep)
+		c4iw_get_ep(&ep->com);
+	xa_unlock_irqrestore(&dev->stids, flags);
+	return ep;
+}
+
+void _c4iw_free_ep(struct kref *kref)
+{
+	struct c4iw_ep *ep;
+
+	ep = container_of(kref, struct c4iw_ep, com.kref);
+	pr_debug("ep %p state %s\n", ep, states[ep->com.state]);
+	if (test_bit(QP_REFERENCED, &ep->com.flags))
+		deref_qp(ep);
+	if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
+		if (ep->com.remote_addr.ss_family == AF_INET6) {
+			struct sockaddr_in6 *sin6 =
+					(struct sockaddr_in6 *)
+					&ep->com.local_addr;
+
+			cxgb4_clip_release(
+					ep->com.dev->rdev.lldi.ports[0],
+					(const u32 *)&sin6->sin6_addr.s6_addr,
+					1);
+		}
+		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
+				 ep->com.local_addr.ss_family);
+		dst_release(ep->dst);
+		cxgb4_l2t_release(ep->l2t);
+		kfree_skb(ep->mpa_skb);
+	}
+	if (!skb_queue_empty(&ep->com.ep_skb_list))
+		skb_queue_purge(&ep->com.ep_skb_list);
+	c4iw_put_wr_wait(ep->com.wr_waitp);
+	kfree(ep);
+}
+
+static void release_ep_resources(struct c4iw_ep *ep)
+{
+	set_bit(RELEASE_RESOURCES, &ep->com.flags);
+
+	/*
+	 * If we have a hwtid, then remove it from the idr table
+	 * so lookups will no longer find this endpoint.  Otherwise
+	 * we have a race where one thread finds the ep ptr just
+	 * before the other thread is freeing the ep memory.
+	 */
+	if (ep->hwtid != -1)
+		remove_ep_tid(ep);
+	c4iw_put_ep(&ep->com);
+}
+
+static int status2errno(int status)
+{
+	switch (status) {
+	case CPL_ERR_NONE:
+		return 0;
+	case CPL_ERR_CONN_RESET:
+		return -ECONNRESET;
+	case CPL_ERR_ARP_MISS:
+		return -EHOSTUNREACH;
+	case CPL_ERR_CONN_TIMEDOUT:
+		return -ETIMEDOUT;
+	case CPL_ERR_TCAM_FULL:
+		return -ENOMEM;
+	case CPL_ERR_CONN_EXIST:
+		return -EADDRINUSE;
+	default:
+		return -EIO;
+	}
+}
+
+/*
+ * Try and reuse skbs already allocated...
+ */
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
+{
+	if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
+		skb_trim(skb, 0);
+		skb_get(skb);
+		skb_reset_transport_header(skb);
+	} else {
+		skb = alloc_skb(len, gfp);
+		if (!skb)
+			return NULL;
+	}
+	t4_set_arp_err_handler(skb, NULL, NULL);
+	return skb;
+}
+
+static struct net_device *get_real_dev(struct net_device *egress_dev)
+{
+	return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
+}
+
+static void arp_failure_discard(void *handle, struct sk_buff *skb)
+{
+	pr_err("ARP failure\n");
+	kfree_skb(skb);
+}
+
+static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
+{
+	pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
+}
+
+enum {
+	NUM_FAKE_CPLS = 2,
+	FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
+	FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
+};
+
+static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+
+	ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
+	release_ep_resources(ep);
+	return 0;
+}
+
+static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+
+	ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
+	c4iw_put_ep(&ep->parent_ep->com);
+	release_ep_resources(ep);
+	return 0;
+}
+
+/*
+ * Fake up a special CPL opcode and call sched() so process_work() will call
+ * _put_ep_safe() in a safe context to free the ep resources.  This is needed
+ * because ARP error handlers are called in an ATOMIC context, and
+ * _c4iw_free_ep() needs to block.
+ */
+static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
+				  int cpl)
+{
+	struct cpl_act_establish *rpl = cplhdr(skb);
+
+	/* Set our special ARP_FAILURE opcode */
+	rpl->ot.opcode = cpl;
+
+	/*
+	 * Save ep in the skb->cb area, after where sched() will save the dev
+	 * ptr.
+	 */
+	*((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
+	sched(ep->com.dev, skb);
+}
+
+/* Handle an ARP failure for an accept */
+static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep = handle;
+
+	pr_err("ARP failure during accept - tid %u - dropping connection\n",
+	       ep->hwtid);
+
+	__state_set(&ep->com, DEAD);
+	queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep = handle;
+
+	pr_err("ARP failure during connect\n");
+	connect_reply_upcall(ep, -EHOSTUNREACH);
+	__state_set(&ep->com, DEAD);
+	if (ep->com.remote_addr.ss_family == AF_INET6) {
+		struct sockaddr_in6 *sin6 =
+			(struct sockaddr_in6 *)&ep->com.local_addr;
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+	}
+	xa_erase_irq(&ep->com.dev->atids, ep->atid);
+	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+	queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
+}
+
+/*
+ * Handle an ARP failure for a CPL_ABORT_REQ.  Change it into a no RST variant
+ * and send it along.
+ */
+static void abort_arp_failure(void *handle, struct sk_buff *skb)
+{
+	int ret;
+	struct c4iw_ep *ep = handle;
+	struct c4iw_rdev *rdev = &ep->com.dev->rdev;
+	struct cpl_abort_req *req = cplhdr(skb);
+
+	pr_debug("rdev %p\n", rdev);
+	req->cmd = CPL_ABORT_NO_RST;
+	skb_get(skb);
+	ret = c4iw_ofld_send(rdev, skb);
+	if (ret) {
+		__state_set(&ep->com, DEAD);
+		queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
+	} else
+		kfree_skb(skb);
+}
+
+static int send_flowc(struct c4iw_ep *ep)
+{
+	struct fw_flowc_wr *flowc;
+	struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
+	u16 vlan = ep->l2t->vlan;
+	int nparams;
+	int flowclen, flowclen16;
+
+	if (WARN_ON(!skb))
+		return -ENOMEM;
+
+	if (vlan == CPL_L2T_VLAN_NONE)
+		nparams = 9;
+	else
+		nparams = 10;
+
+	flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
+	flowclen16 = DIV_ROUND_UP(flowclen, 16);
+	flowclen = flowclen16 * 16;
+
+	flowc = __skb_put(skb, flowclen);
+	memset(flowc, 0, flowclen);
+
+	flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
+					   FW_FLOWC_WR_NPARAMS_V(nparams));
+	flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) |
+					  FW_WR_FLOWID_V(ep->hwtid));
+
+	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
+	flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
+					    (ep->com.dev->rdev.lldi.pf));
+	flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
+	flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
+	flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
+	flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
+	flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
+	flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
+	flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
+	flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
+	flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
+	flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
+	flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
+	flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
+	flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
+	flowc->mnemval[7].val = cpu_to_be32(ep->emss);
+	flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE;
+	flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale);
+	if (nparams == 10) {
+		u16 pri;
+		pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+		flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
+		flowc->mnemval[9].val = cpu_to_be32(pri);
+	}
+
+	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+	return c4iw_ofld_send(&ep->com.dev->rdev, skb);
+}
+
+static int send_halfclose(struct c4iw_ep *ep)
+{
+	struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
+	u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16);
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	if (WARN_ON(!skb))
+		return -ENOMEM;
+
+	cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx,
+			      NULL, arp_failure_discard);
+
+	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static void read_tcb(struct c4iw_ep *ep)
+{
+	struct sk_buff *skb;
+	struct cpl_get_tcb *req;
+	int wrlen = roundup(sizeof(*req), 16);
+
+	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+	if (WARN_ON(!skb))
+		return;
+
+	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
+	req = (struct cpl_get_tcb *) skb_put(skb, wrlen);
+	memset(req, 0, wrlen);
+	INIT_TP_WR(req, ep->hwtid);
+	OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_GET_TCB, ep->hwtid));
+	req->reply_ctrl = htons(REPLY_CHAN_V(0) | QUEUENO_V(ep->rss_qid));
+
+	/*
+	 * keep a ref on the ep so the tcb is not unlocked before this
+	 * cpl completes. The ref is released in read_tcb_rpl().
+	 */
+	c4iw_get_ep(&ep->com);
+	if (WARN_ON(c4iw_ofld_send(&ep->com.dev->rdev, skb)))
+		c4iw_put_ep(&ep->com);
+}
+
+static int send_abort_req(struct c4iw_ep *ep)
+{
+	u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16);
+	struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	if (WARN_ON(!req_skb))
+		return -ENOMEM;
+
+	cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx,
+			  ep, abort_arp_failure);
+
+	return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
+}
+
+static int send_abort(struct c4iw_ep *ep)
+{
+	if (!ep->com.qp || !ep->com.qp->srq) {
+		send_abort_req(ep);
+		return 0;
+	}
+	set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags);
+	read_tcb(ep);
+	return 0;
+}
+
+static int send_connect(struct c4iw_ep *ep)
+{
+	struct cpl_act_open_req *req = NULL;
+	struct cpl_t5_act_open_req *t5req = NULL;
+	struct cpl_t6_act_open_req *t6req = NULL;
+	struct cpl_act_open_req6 *req6 = NULL;
+	struct cpl_t5_act_open_req6 *t5req6 = NULL;
+	struct cpl_t6_act_open_req6 *t6req6 = NULL;
+	struct sk_buff *skb;
+	u64 opt0;
+	u32 opt2;
+	unsigned int mtu_idx;
+	u32 wscale;
+	int win, sizev4, sizev6, wrlen;
+	struct sockaddr_in *la = (struct sockaddr_in *)
+				 &ep->com.local_addr;
+	struct sockaddr_in *ra = (struct sockaddr_in *)
+				 &ep->com.remote_addr;
+	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
+				   &ep->com.local_addr;
+	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
+				   &ep->com.remote_addr;
+	int ret;
+	enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
+	u32 isn = (get_random_u32() & ~7UL) - 1;
+	struct net_device *netdev;
+	u64 params;
+
+	netdev = ep->com.dev->rdev.lldi.ports[0];
+
+	switch (CHELSIO_CHIP_VERSION(adapter_type)) {
+	case CHELSIO_T4:
+		sizev4 = sizeof(struct cpl_act_open_req);
+		sizev6 = sizeof(struct cpl_act_open_req6);
+		break;
+	case CHELSIO_T5:
+		sizev4 = sizeof(struct cpl_t5_act_open_req);
+		sizev6 = sizeof(struct cpl_t5_act_open_req6);
+		break;
+	case CHELSIO_T6:
+		sizev4 = sizeof(struct cpl_t6_act_open_req);
+		sizev6 = sizeof(struct cpl_t6_act_open_req6);
+		break;
+	default:
+		pr_err("T%d Chip is not supported\n",
+		       CHELSIO_CHIP_VERSION(adapter_type));
+		return -EINVAL;
+	}
+
+	wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
+			roundup(sizev4, 16) :
+			roundup(sizev6, 16);
+
+	pr_debug("ep %p atid %u\n", ep, ep->atid);
+
+	skb = get_skb(NULL, wrlen, GFP_KERNEL);
+	if (!skb) {
+		pr_err("%s - failed to alloc skb\n", __func__);
+		return -ENOMEM;
+	}
+	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
+
+	cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+		      enable_tcp_timestamps,
+		      (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
+	wscale = cxgb_compute_wscale(rcv_win);
+
+	/*
+	 * Specify the largest window that will fit in opt0. The
+	 * remainder will be specified in the rx_data_ack.
+	 */
+	win = ep->rcv_win >> 10;
+	if (win > RCV_BUFSIZ_M)
+		win = RCV_BUFSIZ_M;
+
+	opt0 = (nocong ? NO_CONG_F : 0) |
+	       KEEP_ALIVE_F |
+	       DELACK_F |
+	       WND_SCALE_V(wscale) |
+	       MSS_IDX_V(mtu_idx) |
+	       L2T_IDX_V(ep->l2t->idx) |
+	       TX_CHAN_V(ep->tx_chan) |
+	       SMAC_SEL_V(ep->smac_idx) |
+	       DSCP_V(ep->tos >> 2) |
+	       ULP_MODE_V(ULP_MODE_TCPDDP) |
+	       RCV_BUFSIZ_V(win);
+	opt2 = RX_CHANNEL_V(0) |
+	       CCTRL_ECN_V(enable_ecn) |
+	       RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
+	if (enable_tcp_timestamps)
+		opt2 |= TSTAMPS_EN_F;
+	if (enable_tcp_sack)
+		opt2 |= SACK_EN_F;
+	if (wscale && enable_tcp_window_scaling)
+		opt2 |= WND_SCALE_EN_F;
+	if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
+		if (peer2peer)
+			isn += 4;
+
+		opt2 |= T5_OPT_2_VALID_F;
+		opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
+		opt2 |= T5_ISS_F;
+	}
+
+	params = cxgb4_select_ntuple(netdev, ep->l2t);
+
+	if (ep->com.remote_addr.ss_family == AF_INET6)
+		cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
+			       (const u32 *)&la6->sin6_addr.s6_addr, 1);
+
+	t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
+
+	if (ep->com.remote_addr.ss_family == AF_INET) {
+		switch (CHELSIO_CHIP_VERSION(adapter_type)) {
+		case CHELSIO_T4:
+			req = skb_put(skb, wrlen);
+			INIT_TP_WR(req, 0);
+			break;
+		case CHELSIO_T5:
+			t5req = skb_put(skb, wrlen);
+			INIT_TP_WR(t5req, 0);
+			req = (struct cpl_act_open_req *)t5req;
+			break;
+		case CHELSIO_T6:
+			t6req = skb_put(skb, wrlen);
+			INIT_TP_WR(t6req, 0);
+			req = (struct cpl_act_open_req *)t6req;
+			t5req = (struct cpl_t5_act_open_req *)t6req;
+			break;
+		default:
+			pr_err("T%d Chip is not supported\n",
+			       CHELSIO_CHIP_VERSION(adapter_type));
+			ret = -EINVAL;
+			goto clip_release;
+		}
+
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
+					((ep->rss_qid<<14) | ep->atid)));
+		req->local_port = la->sin_port;
+		req->peer_port = ra->sin_port;
+		req->local_ip = la->sin_addr.s_addr;
+		req->peer_ip = ra->sin_addr.s_addr;
+		req->opt0 = cpu_to_be64(opt0);
+
+		if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
+			req->params = cpu_to_be32(params);
+			req->opt2 = cpu_to_be32(opt2);
+		} else {
+			if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
+				t5req->params =
+					  cpu_to_be64(FILTER_TUPLE_V(params));
+				t5req->rsvd = cpu_to_be32(isn);
+				pr_debug("snd_isn %u\n", t5req->rsvd);
+				t5req->opt2 = cpu_to_be32(opt2);
+			} else {
+				t6req->params =
+					  cpu_to_be64(FILTER_TUPLE_V(params));
+				t6req->rsvd = cpu_to_be32(isn);
+				pr_debug("snd_isn %u\n", t6req->rsvd);
+				t6req->opt2 = cpu_to_be32(opt2);
+			}
+		}
+	} else {
+		switch (CHELSIO_CHIP_VERSION(adapter_type)) {
+		case CHELSIO_T4:
+			req6 = skb_put(skb, wrlen);
+			INIT_TP_WR(req6, 0);
+			break;
+		case CHELSIO_T5:
+			t5req6 = skb_put(skb, wrlen);
+			INIT_TP_WR(t5req6, 0);
+			req6 = (struct cpl_act_open_req6 *)t5req6;
+			break;
+		case CHELSIO_T6:
+			t6req6 = skb_put(skb, wrlen);
+			INIT_TP_WR(t6req6, 0);
+			req6 = (struct cpl_act_open_req6 *)t6req6;
+			t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
+			break;
+		default:
+			pr_err("T%d Chip is not supported\n",
+			       CHELSIO_CHIP_VERSION(adapter_type));
+			ret = -EINVAL;
+			goto clip_release;
+		}
+
+		OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+					((ep->rss_qid<<14)|ep->atid)));
+		req6->local_port = la6->sin6_port;
+		req6->peer_port = ra6->sin6_port;
+		req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
+		req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
+		req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
+		req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
+		req6->opt0 = cpu_to_be64(opt0);
+
+		if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
+			req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev,
+								      ep->l2t));
+			req6->opt2 = cpu_to_be32(opt2);
+		} else {
+			if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
+				t5req6->params =
+					    cpu_to_be64(FILTER_TUPLE_V(params));
+				t5req6->rsvd = cpu_to_be32(isn);
+				pr_debug("snd_isn %u\n", t5req6->rsvd);
+				t5req6->opt2 = cpu_to_be32(opt2);
+			} else {
+				t6req6->params =
+					    cpu_to_be64(FILTER_TUPLE_V(params));
+				t6req6->rsvd = cpu_to_be32(isn);
+				pr_debug("snd_isn %u\n", t6req6->rsvd);
+				t6req6->opt2 = cpu_to_be32(opt2);
+			}
+
+		}
+	}
+
+	set_bit(ACT_OPEN_REQ, &ep->com.history);
+	ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+clip_release:
+	if (ret && ep->com.remote_addr.ss_family == AF_INET6)
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&la6->sin6_addr.s6_addr, 1);
+	return ret;
+}
+
+static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
+			u8 mpa_rev_to_use)
+{
+	int mpalen, wrlen, ret;
+	struct fw_ofld_tx_data_wr *req;
+	struct mpa_message *mpa;
+	struct mpa_v2_conn_params mpa_v2_params;
+
+	pr_debug("ep %p tid %u pd_len %d\n",
+		 ep, ep->hwtid, ep->plen);
+
+	mpalen = sizeof(*mpa) + ep->plen;
+	if (mpa_rev_to_use == 2)
+		mpalen += sizeof(struct mpa_v2_conn_params);
+	wrlen = roundup(mpalen + sizeof(*req), 16);
+	skb = get_skb(skb, wrlen, GFP_KERNEL);
+	if (!skb) {
+		connect_reply_upcall(ep, -ENOMEM);
+		return -ENOMEM;
+	}
+	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+	req = skb_put_zero(skb, wrlen);
+	req->op_to_immdlen = cpu_to_be32(
+		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+		FW_WR_COMPL_F |
+		FW_WR_IMMDLEN_V(mpalen));
+	req->flowid_len16 = cpu_to_be32(
+		FW_WR_FLOWID_V(ep->hwtid) |
+		FW_WR_LEN16_V(wrlen >> 4));
+	req->plen = cpu_to_be32(mpalen);
+	req->tunnel_to_proxy = cpu_to_be32(
+		FW_OFLD_TX_DATA_WR_FLUSH_F |
+		FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+	mpa = (struct mpa_message *)(req + 1);
+	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
+
+	mpa->flags = 0;
+	if (crc_enabled)
+		mpa->flags |= MPA_CRC;
+	if (markers_enabled) {
+		mpa->flags |= MPA_MARKERS;
+		ep->mpa_attr.recv_marker_enabled = 1;
+	} else {
+		ep->mpa_attr.recv_marker_enabled = 0;
+	}
+	if (mpa_rev_to_use == 2)
+		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
+
+	mpa->private_data_size = htons(ep->plen);
+	mpa->revision = mpa_rev_to_use;
+	if (mpa_rev_to_use == 1) {
+		ep->tried_with_mpa_v1 = 1;
+		ep->retry_with_mpa_v1 = 0;
+	}
+
+	if (mpa_rev_to_use == 2) {
+		mpa->private_data_size =
+			htons(ntohs(mpa->private_data_size) +
+			      sizeof(struct mpa_v2_conn_params));
+		pr_debug("initiator ird %u ord %u\n", ep->ird,
+			 ep->ord);
+		mpa_v2_params.ird = htons((u16)ep->ird);
+		mpa_v2_params.ord = htons((u16)ep->ord);
+
+		if (peer2peer) {
+			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
+			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
+				mpa_v2_params.ord |=
+					htons(MPA_V2_RDMA_WRITE_RTR);
+			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
+				mpa_v2_params.ord |=
+					htons(MPA_V2_RDMA_READ_RTR);
+		}
+		memcpy(mpa->private_data, &mpa_v2_params,
+		       sizeof(struct mpa_v2_conn_params));
+
+		if (ep->plen)
+			memcpy(mpa->private_data +
+			       sizeof(struct mpa_v2_conn_params),
+			       ep->mpa_pkt + sizeof(*mpa), ep->plen);
+	} else
+		if (ep->plen)
+			memcpy(mpa->private_data,
+					ep->mpa_pkt + sizeof(*mpa), ep->plen);
+
+	/*
+	 * Reference the mpa skb.  This ensures the data area
+	 * will remain in memory until the hw acks the tx.
+	 * Function fw4_ack() will deref it.
+	 */
+	skb_get(skb);
+	t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+	ep->mpa_skb = skb;
+	ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+	if (ret)
+		return ret;
+	start_ep_timer(ep);
+	__state_set(&ep->com, MPA_REQ_SENT);
+	ep->mpa_attr.initiator = 1;
+	ep->snd_seq += mpalen;
+	return ret;
+}
+
+static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+	int mpalen, wrlen;
+	struct fw_ofld_tx_data_wr *req;
+	struct mpa_message *mpa;
+	struct sk_buff *skb;
+	struct mpa_v2_conn_params mpa_v2_params;
+
+	pr_debug("ep %p tid %u pd_len %d\n",
+		 ep, ep->hwtid, ep->plen);
+
+	mpalen = sizeof(*mpa) + plen;
+	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
+		mpalen += sizeof(struct mpa_v2_conn_params);
+	wrlen = roundup(mpalen + sizeof(*req), 16);
+
+	skb = get_skb(NULL, wrlen, GFP_KERNEL);
+	if (!skb) {
+		pr_err("%s - cannot alloc skb!\n", __func__);
+		return -ENOMEM;
+	}
+	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+	req = skb_put_zero(skb, wrlen);
+	req->op_to_immdlen = cpu_to_be32(
+		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+		FW_WR_COMPL_F |
+		FW_WR_IMMDLEN_V(mpalen));
+	req->flowid_len16 = cpu_to_be32(
+		FW_WR_FLOWID_V(ep->hwtid) |
+		FW_WR_LEN16_V(wrlen >> 4));
+	req->plen = cpu_to_be32(mpalen);
+	req->tunnel_to_proxy = cpu_to_be32(
+		FW_OFLD_TX_DATA_WR_FLUSH_F |
+		FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+	mpa = (struct mpa_message *)(req + 1);
+	memset(mpa, 0, sizeof(*mpa));
+	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+	mpa->flags = MPA_REJECT;
+	mpa->revision = ep->mpa_attr.version;
+	mpa->private_data_size = htons(plen);
+
+	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
+		mpa->private_data_size =
+			htons(ntohs(mpa->private_data_size) +
+			      sizeof(struct mpa_v2_conn_params));
+		mpa_v2_params.ird = htons(((u16)ep->ird) |
+					  (peer2peer ? MPA_V2_PEER2PEER_MODEL :
+					   0));
+		mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
+					  (p2p_type ==
+					   FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
+					   MPA_V2_RDMA_WRITE_RTR : p2p_type ==
+					   FW_RI_INIT_P2PTYPE_READ_REQ ?
+					   MPA_V2_RDMA_READ_RTR : 0) : 0));
+		memcpy(mpa->private_data, &mpa_v2_params,
+		       sizeof(struct mpa_v2_conn_params));
+
+		if (ep->plen)
+			memcpy(mpa->private_data +
+			       sizeof(struct mpa_v2_conn_params), pdata, plen);
+	} else
+		if (plen)
+			memcpy(mpa->private_data, pdata, plen);
+
+	/*
+	 * Reference the mpa skb again.  This ensures the data area
+	 * will remain in memory until the hw acks the tx.
+	 * Function fw4_ack() will deref it.
+	 */
+	skb_get(skb);
+	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+	t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
+	ep->mpa_skb = skb;
+	ep->snd_seq += mpalen;
+	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+	int mpalen, wrlen;
+	struct fw_ofld_tx_data_wr *req;
+	struct mpa_message *mpa;
+	struct sk_buff *skb;
+	struct mpa_v2_conn_params mpa_v2_params;
+
+	pr_debug("ep %p tid %u pd_len %d\n",
+		 ep, ep->hwtid, ep->plen);
+
+	mpalen = sizeof(*mpa) + plen;
+	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
+		mpalen += sizeof(struct mpa_v2_conn_params);
+	wrlen = roundup(mpalen + sizeof(*req), 16);
+
+	skb = get_skb(NULL, wrlen, GFP_KERNEL);
+	if (!skb) {
+		pr_err("%s - cannot alloc skb!\n", __func__);
+		return -ENOMEM;
+	}
+	set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+	req = skb_put_zero(skb, wrlen);
+	req->op_to_immdlen = cpu_to_be32(
+		FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+		FW_WR_COMPL_F |
+		FW_WR_IMMDLEN_V(mpalen));
+	req->flowid_len16 = cpu_to_be32(
+		FW_WR_FLOWID_V(ep->hwtid) |
+		FW_WR_LEN16_V(wrlen >> 4));
+	req->plen = cpu_to_be32(mpalen);
+	req->tunnel_to_proxy = cpu_to_be32(
+		FW_OFLD_TX_DATA_WR_FLUSH_F |
+		FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+	mpa = (struct mpa_message *)(req + 1);
+	memset(mpa, 0, sizeof(*mpa));
+	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+	mpa->flags = 0;
+	if (ep->mpa_attr.crc_enabled)
+		mpa->flags |= MPA_CRC;
+	if (ep->mpa_attr.recv_marker_enabled)
+		mpa->flags |= MPA_MARKERS;
+	mpa->revision = ep->mpa_attr.version;
+	mpa->private_data_size = htons(plen);
+
+	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+		mpa->flags |= MPA_ENHANCED_RDMA_CONN;
+		mpa->private_data_size =
+			htons(ntohs(mpa->private_data_size) +
+			      sizeof(struct mpa_v2_conn_params));
+		mpa_v2_params.ird = htons((u16)ep->ird);
+		mpa_v2_params.ord = htons((u16)ep->ord);
+		if (peer2peer && (ep->mpa_attr.p2p_type !=
+					FW_RI_INIT_P2PTYPE_DISABLED)) {
+			mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
+
+			if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
+				mpa_v2_params.ord |=
+					htons(MPA_V2_RDMA_WRITE_RTR);
+			else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
+				mpa_v2_params.ord |=
+					htons(MPA_V2_RDMA_READ_RTR);
+		}
+
+		memcpy(mpa->private_data, &mpa_v2_params,
+		       sizeof(struct mpa_v2_conn_params));
+
+		if (ep->plen)
+			memcpy(mpa->private_data +
+			       sizeof(struct mpa_v2_conn_params), pdata, plen);
+	} else
+		if (plen)
+			memcpy(mpa->private_data, pdata, plen);
+
+	/*
+	 * Reference the mpa skb.  This ensures the data area
+	 * will remain in memory until the hw acks the tx.
+	 * Function fw4_ack() will deref it.
+	 */
+	skb_get(skb);
+	t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
+	ep->mpa_skb = skb;
+	__state_set(&ep->com, MPA_REP_SENT);
+	ep->snd_seq += mpalen;
+	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct cpl_act_establish *req = cplhdr(skb);
+	unsigned short tcp_opt = ntohs(req->tcp_opt);
+	unsigned int tid = GET_TID(req);
+	unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
+	struct tid_info *t = dev->rdev.lldi.tids;
+	int ret;
+
+	ep = lookup_atid(t, atid);
+
+	pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", ep, tid,
+		 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
+
+	mutex_lock(&ep->com.mutex);
+	dst_confirm(ep->dst);
+
+	/* setup the hwtid for this connection */
+	ep->hwtid = tid;
+	cxgb4_insert_tid(t, ep, tid, ep->com.local_addr.ss_family);
+	insert_ep_tid(ep);
+
+	ep->snd_seq = be32_to_cpu(req->snd_isn);
+	ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+	ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
+
+	set_emss(ep, tcp_opt);
+
+	/* dealloc the atid */
+	xa_erase_irq(&ep->com.dev->atids, atid);
+	cxgb4_free_atid(t, atid);
+	set_bit(ACT_ESTAB, &ep->com.history);
+
+	/* start MPA negotiation */
+	ret = send_flowc(ep);
+	if (ret)
+		goto err;
+	if (ep->retry_with_mpa_v1)
+		ret = send_mpa_req(ep, skb, 1);
+	else
+		ret = send_mpa_req(ep, skb, mpa_rev);
+	if (ret)
+		goto err;
+	mutex_unlock(&ep->com.mutex);
+	return 0;
+err:
+	mutex_unlock(&ep->com.mutex);
+	connect_reply_upcall(ep, -ENOMEM);
+	c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+	return 0;
+}
+
+static void close_complete_upcall(struct c4iw_ep *ep, int status)
+{
+	struct iw_cm_event event;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_CLOSE;
+	event.status = status;
+	if (ep->com.cm_id) {
+		pr_debug("close complete delivered ep %p cm_id %p tid %u\n",
+			 ep, ep->com.cm_id, ep->hwtid);
+		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+		deref_cm_id(&ep->com);
+		set_bit(CLOSE_UPCALL, &ep->com.history);
+	}
+}
+
+static void peer_close_upcall(struct c4iw_ep *ep)
+{
+	struct iw_cm_event event;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_DISCONNECT;
+	if (ep->com.cm_id) {
+		pr_debug("peer close delivered ep %p cm_id %p tid %u\n",
+			 ep, ep->com.cm_id, ep->hwtid);
+		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+		set_bit(DISCONN_UPCALL, &ep->com.history);
+	}
+}
+
+static void peer_abort_upcall(struct c4iw_ep *ep)
+{
+	struct iw_cm_event event;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_CLOSE;
+	event.status = -ECONNRESET;
+	if (ep->com.cm_id) {
+		pr_debug("abort delivered ep %p cm_id %p tid %u\n", ep,
+			 ep->com.cm_id, ep->hwtid);
+		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+		deref_cm_id(&ep->com);
+		set_bit(ABORT_UPCALL, &ep->com.history);
+	}
+}
+
+static void connect_reply_upcall(struct c4iw_ep *ep, int status)
+{
+	struct iw_cm_event event;
+
+	pr_debug("ep %p tid %u status %d\n",
+		 ep, ep->hwtid, status);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_CONNECT_REPLY;
+	event.status = status;
+	memcpy(&event.local_addr, &ep->com.local_addr,
+	       sizeof(ep->com.local_addr));
+	memcpy(&event.remote_addr, &ep->com.remote_addr,
+	       sizeof(ep->com.remote_addr));
+
+	if ((status == 0) || (status == -ECONNREFUSED)) {
+		if (!ep->tried_with_mpa_v1) {
+			/* this means MPA_v2 is used */
+			event.ord = ep->ird;
+			event.ird = ep->ord;
+			event.private_data_len = ep->plen -
+				sizeof(struct mpa_v2_conn_params);
+			event.private_data = ep->mpa_pkt +
+				sizeof(struct mpa_message) +
+				sizeof(struct mpa_v2_conn_params);
+		} else {
+			/* this means MPA_v1 is used */
+			event.ord = cur_max_read_depth(ep->com.dev);
+			event.ird = cur_max_read_depth(ep->com.dev);
+			event.private_data_len = ep->plen;
+			event.private_data = ep->mpa_pkt +
+				sizeof(struct mpa_message);
+		}
+	}
+
+	pr_debug("ep %p tid %u status %d\n", ep,
+		 ep->hwtid, status);
+	set_bit(CONN_RPL_UPCALL, &ep->com.history);
+	ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+
+	if (status < 0)
+		deref_cm_id(&ep->com);
+}
+
+static int connect_request_upcall(struct c4iw_ep *ep)
+{
+	struct iw_cm_event event;
+	int ret;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_CONNECT_REQUEST;
+	memcpy(&event.local_addr, &ep->com.local_addr,
+	       sizeof(ep->com.local_addr));
+	memcpy(&event.remote_addr, &ep->com.remote_addr,
+	       sizeof(ep->com.remote_addr));
+	event.provider_data = ep;
+	if (!ep->tried_with_mpa_v1) {
+		/* this means MPA_v2 is used */
+		event.ord = ep->ord;
+		event.ird = ep->ird;
+		event.private_data_len = ep->plen -
+			sizeof(struct mpa_v2_conn_params);
+		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
+			sizeof(struct mpa_v2_conn_params);
+	} else {
+		/* this means MPA_v1 is used. Send max supported */
+		event.ord = cur_max_read_depth(ep->com.dev);
+		event.ird = cur_max_read_depth(ep->com.dev);
+		event.private_data_len = ep->plen;
+		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+	}
+	c4iw_get_ep(&ep->com);
+	ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
+						      &event);
+	if (ret)
+		c4iw_put_ep(&ep->com);
+	set_bit(CONNREQ_UPCALL, &ep->com.history);
+	c4iw_put_ep(&ep->parent_ep->com);
+	return ret;
+}
+
+static void established_upcall(struct c4iw_ep *ep)
+{
+	struct iw_cm_event event;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	memset(&event, 0, sizeof(event));
+	event.event = IW_CM_EVENT_ESTABLISHED;
+	event.ird = ep->ord;
+	event.ord = ep->ird;
+	if (ep->com.cm_id) {
+		pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+		set_bit(ESTAB_UPCALL, &ep->com.history);
+	}
+}
+
+static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
+{
+	struct sk_buff *skb;
+	u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16);
+	u32 credit_dack;
+
+	pr_debug("ep %p tid %u credits %u\n",
+		 ep, ep->hwtid, credits);
+	skb = get_skb(NULL, wrlen, GFP_KERNEL);
+	if (!skb) {
+		pr_err("update_rx_credits - cannot alloc skb!\n");
+		return 0;
+	}
+
+	/*
+	 * If we couldn't specify the entire rcv window at connection setup
+	 * due to the limit in the number of bits in the RCV_BUFSIZ field,
+	 * then add the overage in to the credits returned.
+	 */
+	if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
+		credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
+
+	credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F |
+		      RX_DACK_MODE_V(dack_mode);
+
+	cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx,
+			    credit_dack);
+
+	c4iw_ofld_send(&ep->com.dev->rdev, skb);
+	return credits;
+}
+
+#define RELAXED_IRD_NEGOTIATION 1
+
+/*
+ * process_mpa_reply - process streaming mode MPA reply
+ *
+ * Returns:
+ *
+ * 0 upon success indicating a connect request was delivered to the ULP
+ * or the mpa request is incomplete but valid so far.
+ *
+ * 1 if a failure requires the caller to close the connection.
+ *
+ * 2 if a failure requires the caller to abort the connection.
+ */
+static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+	struct mpa_message *mpa;
+	struct mpa_v2_conn_params *mpa_v2_params;
+	u16 plen;
+	u16 resp_ird, resp_ord;
+	u8 rtr_mismatch = 0, insuff_ird = 0;
+	struct c4iw_qp_attributes attrs;
+	enum c4iw_qp_attr_mask mask;
+	int err;
+	int disconnect = 0;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+
+	/*
+	 * If we get more than the supported amount of private data
+	 * then we must fail this connection.
+	 */
+	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+		err = -EINVAL;
+		goto err_stop_timer;
+	}
+
+	/*
+	 * copy the new data into our accumulation buffer.
+	 */
+	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+				  skb->len);
+	ep->mpa_pkt_len += skb->len;
+
+	/*
+	 * if we don't even have the mpa message, then bail.
+	 */
+	if (ep->mpa_pkt_len < sizeof(*mpa))
+		return 0;
+	mpa = (struct mpa_message *) ep->mpa_pkt;
+
+	/* Validate MPA header. */
+	if (mpa->revision > mpa_rev) {
+		pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
+		       __func__, mpa_rev, mpa->revision);
+		err = -EPROTO;
+		goto err_stop_timer;
+	}
+	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
+		err = -EPROTO;
+		goto err_stop_timer;
+	}
+
+	plen = ntohs(mpa->private_data_size);
+
+	/*
+	 * Fail if there's too much private data.
+	 */
+	if (plen > MPA_MAX_PRIVATE_DATA) {
+		err = -EPROTO;
+		goto err_stop_timer;
+	}
+
+	/*
+	 * If plen does not account for pkt size
+	 */
+	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+		err = -EPROTO;
+		goto err_stop_timer;
+	}
+
+	ep->plen = (u8) plen;
+
+	/*
+	 * If we don't have all the pdata yet, then bail.
+	 * We'll continue process when more data arrives.
+	 */
+	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+		return 0;
+
+	if (mpa->flags & MPA_REJECT) {
+		err = -ECONNREFUSED;
+		goto err_stop_timer;
+	}
+
+	/*
+	 * Stop mpa timer.  If it expired, then
+	 * we ignore the MPA reply.  process_timeout()
+	 * will abort the connection.
+	 */
+	if (stop_ep_timer(ep))
+		return 0;
+
+	/*
+	 * If we get here we have accumulated the entire mpa
+	 * start reply message including private data. And
+	 * the MPA header is valid.
+	 */
+	__state_set(&ep->com, FPDU_MODE);
+	ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+	ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+	ep->mpa_attr.version = mpa->revision;
+	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+
+	if (mpa->revision == 2) {
+		ep->mpa_attr.enhanced_rdma_conn =
+			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
+		if (ep->mpa_attr.enhanced_rdma_conn) {
+			mpa_v2_params = (struct mpa_v2_conn_params *)
+				(ep->mpa_pkt + sizeof(*mpa));
+			resp_ird = ntohs(mpa_v2_params->ird) &
+				MPA_V2_IRD_ORD_MASK;
+			resp_ord = ntohs(mpa_v2_params->ord) &
+				MPA_V2_IRD_ORD_MASK;
+			pr_debug("responder ird %u ord %u ep ird %u ord %u\n",
+				 resp_ird, resp_ord, ep->ird, ep->ord);
+
+			/*
+			 * This is a double-check. Ideally, below checks are
+			 * not required since ird/ord stuff has been taken
+			 * care of in c4iw_accept_cr
+			 */
+			if (ep->ird < resp_ord) {
+				if (RELAXED_IRD_NEGOTIATION && resp_ord <=
+				    ep->com.dev->rdev.lldi.max_ordird_qp)
+					ep->ird = resp_ord;
+				else
+					insuff_ird = 1;
+			} else if (ep->ird > resp_ord) {
+				ep->ird = resp_ord;
+			}
+			if (ep->ord > resp_ird) {
+				if (RELAXED_IRD_NEGOTIATION)
+					ep->ord = resp_ird;
+				else
+					insuff_ird = 1;
+			}
+			if (insuff_ird) {
+				err = -ENOMEM;
+				ep->ird = resp_ord;
+				ep->ord = resp_ird;
+			}
+
+			if (ntohs(mpa_v2_params->ird) &
+					MPA_V2_PEER2PEER_MODEL) {
+				if (ntohs(mpa_v2_params->ord) &
+						MPA_V2_RDMA_WRITE_RTR)
+					ep->mpa_attr.p2p_type =
+						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
+				else if (ntohs(mpa_v2_params->ord) &
+						MPA_V2_RDMA_READ_RTR)
+					ep->mpa_attr.p2p_type =
+						FW_RI_INIT_P2PTYPE_READ_REQ;
+			}
+		}
+	} else if (mpa->revision == 1)
+		if (peer2peer)
+			ep->mpa_attr.p2p_type = p2p_type;
+
+	pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n",
+		 ep->mpa_attr.crc_enabled,
+		 ep->mpa_attr.recv_marker_enabled,
+		 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
+		 ep->mpa_attr.p2p_type, p2p_type);
+
+	/*
+	 * If responder's RTR does not match with that of initiator, assign
+	 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
+	 * generated when moving QP to RTS state.
+	 * A TERM message will be sent after QP has moved to RTS state
+	 */
+	if ((ep->mpa_attr.version == 2) && peer2peer &&
+			(ep->mpa_attr.p2p_type != p2p_type)) {
+		ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+		rtr_mismatch = 1;
+	}
+
+	attrs.mpa_attr = ep->mpa_attr;
+	attrs.max_ird = ep->ird;
+	attrs.max_ord = ep->ord;
+	attrs.llp_stream_handle = ep;
+	attrs.next_state = C4IW_QP_STATE_RTS;
+
+	mask = C4IW_QP_ATTR_NEXT_STATE |
+	    C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
+	    C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
+
+	/* bind QP and TID with INIT_WR */
+	err = c4iw_modify_qp(ep->com.qp->rhp,
+			     ep->com.qp, mask, &attrs, 1);
+	if (err)
+		goto err;
+
+	/*
+	 * If responder's RTR requirement did not match with what initiator
+	 * supports, generate TERM message
+	 */
+	if (rtr_mismatch) {
+		pr_err("%s: RTR mismatch, sending TERM\n", __func__);
+		attrs.layer_etype = LAYER_MPA | DDP_LLP;
+		attrs.ecode = MPA_NOMATCH_RTR;
+		attrs.next_state = C4IW_QP_STATE_TERMINATE;
+		attrs.send_term = 1;
+		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		err = -ENOMEM;
+		disconnect = 1;
+		goto out;
+	}
+
+	/*
+	 * Generate TERM if initiator IRD is not sufficient for responder
+	 * provided ORD. Currently, we do the same behaviour even when
+	 * responder provided IRD is also not sufficient as regards to
+	 * initiator ORD.
+	 */
+	if (insuff_ird) {
+		pr_err("%s: Insufficient IRD, sending TERM\n", __func__);
+		attrs.layer_etype = LAYER_MPA | DDP_LLP;
+		attrs.ecode = MPA_INSUFF_IRD;
+		attrs.next_state = C4IW_QP_STATE_TERMINATE;
+		attrs.send_term = 1;
+		err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+				C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		err = -ENOMEM;
+		disconnect = 1;
+		goto out;
+	}
+	goto out;
+err_stop_timer:
+	stop_ep_timer(ep);
+err:
+	disconnect = 2;
+out:
+	connect_reply_upcall(ep, err);
+	return disconnect;
+}
+
+/*
+ * process_mpa_request - process streaming mode MPA request
+ *
+ * Returns:
+ *
+ * 0 upon success indicating a connect request was delivered to the ULP
+ * or the mpa request is incomplete but valid so far.
+ *
+ * 1 if a failure requires the caller to close the connection.
+ *
+ * 2 if a failure requires the caller to abort the connection.
+ */
+static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+	struct mpa_message *mpa;
+	struct mpa_v2_conn_params *mpa_v2_params;
+	u16 plen;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+
+	/*
+	 * If we get more than the supported amount of private data
+	 * then we must fail this connection.
+	 */
+	if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
+		goto err_stop_timer;
+
+	pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
+
+	/*
+	 * Copy the new data into our accumulation buffer.
+	 */
+	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+				  skb->len);
+	ep->mpa_pkt_len += skb->len;
+
+	/*
+	 * If we don't even have the mpa message, then bail.
+	 * We'll continue process when more data arrives.
+	 */
+	if (ep->mpa_pkt_len < sizeof(*mpa))
+		return 0;
+
+	pr_debug("enter (%s line %u)\n", __FILE__, __LINE__);
+	mpa = (struct mpa_message *) ep->mpa_pkt;
+
+	/*
+	 * Validate MPA Header.
+	 */
+	if (mpa->revision > mpa_rev) {
+		pr_err("%s MPA version mismatch. Local = %d, Received = %d\n",
+		       __func__, mpa_rev, mpa->revision);
+		goto err_stop_timer;
+	}
+
+	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
+		goto err_stop_timer;
+
+	plen = ntohs(mpa->private_data_size);
+
+	/*
+	 * Fail if there's too much private data.
+	 */
+	if (plen > MPA_MAX_PRIVATE_DATA)
+		goto err_stop_timer;
+
+	/*
+	 * If plen does not account for pkt size
+	 */
+	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
+		goto err_stop_timer;
+	ep->plen = (u8) plen;
+
+	/*
+	 * If we don't have all the pdata yet, then bail.
+	 */
+	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+		return 0;
+
+	/*
+	 * If we get here we have accumulated the entire mpa
+	 * start reply message including private data.
+	 */
+	ep->mpa_attr.initiator = 0;
+	ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+	ep->mpa_attr.recv_marker_enabled = markers_enabled;
+	ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+	ep->mpa_attr.version = mpa->revision;
+	if (mpa->revision == 1)
+		ep->tried_with_mpa_v1 = 1;
+	ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+
+	if (mpa->revision == 2) {
+		ep->mpa_attr.enhanced_rdma_conn =
+			mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
+		if (ep->mpa_attr.enhanced_rdma_conn) {
+			mpa_v2_params = (struct mpa_v2_conn_params *)
+				(ep->mpa_pkt + sizeof(*mpa));
+			ep->ird = ntohs(mpa_v2_params->ird) &
+				MPA_V2_IRD_ORD_MASK;
+			ep->ird = min_t(u32, ep->ird,
+					cur_max_read_depth(ep->com.dev));
+			ep->ord = ntohs(mpa_v2_params->ord) &
+				MPA_V2_IRD_ORD_MASK;
+			ep->ord = min_t(u32, ep->ord,
+					cur_max_read_depth(ep->com.dev));
+			pr_debug("initiator ird %u ord %u\n",
+				 ep->ird, ep->ord);
+			if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
+				if (peer2peer) {
+					if (ntohs(mpa_v2_params->ord) &
+							MPA_V2_RDMA_WRITE_RTR)
+						ep->mpa_attr.p2p_type =
+						FW_RI_INIT_P2PTYPE_RDMA_WRITE;
+					else if (ntohs(mpa_v2_params->ord) &
+							MPA_V2_RDMA_READ_RTR)
+						ep->mpa_attr.p2p_type =
+						FW_RI_INIT_P2PTYPE_READ_REQ;
+				}
+		}
+	} else if (mpa->revision == 1)
+		if (peer2peer)
+			ep->mpa_attr.p2p_type = p2p_type;
+
+	pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n",
+		 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+		 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
+		 ep->mpa_attr.p2p_type);
+
+	__state_set(&ep->com, MPA_REQ_RCVD);
+
+	/* drive upcall */
+	mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
+	if (ep->parent_ep->com.state != DEAD) {
+		if (connect_request_upcall(ep))
+			goto err_unlock_parent;
+	} else {
+		goto err_unlock_parent;
+	}
+	mutex_unlock(&ep->parent_ep->com.mutex);
+	return 0;
+
+err_unlock_parent:
+	mutex_unlock(&ep->parent_ep->com.mutex);
+	goto err_out;
+err_stop_timer:
+	(void)stop_ep_timer(ep);
+err_out:
+	return 2;
+}
+
+static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct cpl_rx_data *hdr = cplhdr(skb);
+	unsigned int dlen = ntohs(hdr->len);
+	unsigned int tid = GET_TID(hdr);
+	__u8 status = hdr->status;
+	int disconnect = 0;
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+	pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen);
+	skb_pull(skb, sizeof(*hdr));
+	skb_trim(skb, dlen);
+	mutex_lock(&ep->com.mutex);
+
+	switch (ep->com.state) {
+	case MPA_REQ_SENT:
+		update_rx_credits(ep, dlen);
+		ep->rcv_seq += dlen;
+		disconnect = process_mpa_reply(ep, skb);
+		break;
+	case MPA_REQ_WAIT:
+		update_rx_credits(ep, dlen);
+		ep->rcv_seq += dlen;
+		disconnect = process_mpa_request(ep, skb);
+		break;
+	case FPDU_MODE: {
+		struct c4iw_qp_attributes attrs;
+
+		update_rx_credits(ep, dlen);
+		if (status)
+			pr_err("%s Unexpected streaming data." \
+			       " qpid %u ep %p state %d tid %u status %d\n",
+			       __func__, ep->com.qp->wq.sq.qid, ep,
+			       ep->com.state, ep->hwtid, status);
+		attrs.next_state = C4IW_QP_STATE_TERMINATE;
+		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+			       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		disconnect = 1;
+		break;
+	}
+	default:
+		break;
+	}
+	mutex_unlock(&ep->com.mutex);
+	if (disconnect)
+		c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx)
+{
+	enum chip_type adapter_type;
+
+	adapter_type = ep->com.dev->rdev.lldi.adapter_type;
+
+	/*
+	 * If this TCB had a srq buffer cached, then we must complete
+	 * it. For user mode, that means saving the srqidx in the
+	 * user/kernel status page for this qp.  For kernel mode, just
+	 * synthesize the CQE now.
+	 */
+	if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) {
+		if (ep->com.qp->ibqp.uobject)
+			t4_set_wq_in_error(&ep->com.qp->wq, srqidx);
+		else
+			c4iw_flush_srqidx(ep->com.qp, srqidx);
+	}
+}
+
+static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	u32 srqidx;
+	struct c4iw_ep *ep;
+	struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb);
+	int release = 0;
+	unsigned int tid = GET_TID(rpl);
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep) {
+		pr_warn("Abort rpl to freed endpoint\n");
+		return 0;
+	}
+
+	if (ep->com.qp && ep->com.qp->srq) {
+		srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(rpl->srqidx_status));
+		complete_cached_srq_buffers(ep, srqidx ? srqidx : ep->srqe_idx);
+	}
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	mutex_lock(&ep->com.mutex);
+	switch (ep->com.state) {
+	case ABORTING:
+		c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
+		__state_set(&ep->com, DEAD);
+		release = 1;
+		break;
+	default:
+		pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
+		break;
+	}
+	mutex_unlock(&ep->com.mutex);
+
+	if (release) {
+		close_complete_upcall(ep, -ECONNRESET);
+		release_ep_resources(ep);
+	}
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
+{
+	struct sk_buff *skb;
+	struct fw_ofld_connection_wr *req;
+	unsigned int mtu_idx;
+	u32 wscale;
+	struct sockaddr_in *sin;
+	int win;
+
+	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	req = __skb_put_zero(skb, sizeof(*req));
+	req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
+	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
+	req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
+				     ep->com.dev->rdev.lldi.ports[0],
+				     ep->l2t));
+	sin = (struct sockaddr_in *)&ep->com.local_addr;
+	req->le.lport = sin->sin_port;
+	req->le.u.ipv4.lip = sin->sin_addr.s_addr;
+	sin = (struct sockaddr_in *)&ep->com.remote_addr;
+	req->le.pport = sin->sin_port;
+	req->le.u.ipv4.pip = sin->sin_addr.s_addr;
+	req->tcb.t_state_to_astid =
+			htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
+			FW_OFLD_CONNECTION_WR_ASTID_V(atid));
+	req->tcb.cplrxdataack_cplpassacceptrpl =
+			htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
+	req->tcb.tx_max = (__force __be32) jiffies;
+	req->tcb.rcv_adv = htons(1);
+	cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+		      enable_tcp_timestamps,
+		      (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
+	wscale = cxgb_compute_wscale(rcv_win);
+
+	/*
+	 * Specify the largest window that will fit in opt0. The
+	 * remainder will be specified in the rx_data_ack.
+	 */
+	win = ep->rcv_win >> 10;
+	if (win > RCV_BUFSIZ_M)
+		win = RCV_BUFSIZ_M;
+
+	req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
+		(nocong ? NO_CONG_F : 0) |
+		KEEP_ALIVE_F |
+		DELACK_F |
+		WND_SCALE_V(wscale) |
+		MSS_IDX_V(mtu_idx) |
+		L2T_IDX_V(ep->l2t->idx) |
+		TX_CHAN_V(ep->tx_chan) |
+		SMAC_SEL_V(ep->smac_idx) |
+		DSCP_V(ep->tos >> 2) |
+		ULP_MODE_V(ULP_MODE_TCPDDP) |
+		RCV_BUFSIZ_V(win));
+	req->tcb.opt2 = (__force __be32) (PACE_V(1) |
+		TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
+		RX_CHANNEL_V(0) |
+		CCTRL_ECN_V(enable_ecn) |
+		RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
+	if (enable_tcp_timestamps)
+		req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
+	if (enable_tcp_sack)
+		req->tcb.opt2 |= (__force __be32)SACK_EN_F;
+	if (wscale && enable_tcp_window_scaling)
+		req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
+	req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
+	req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
+	set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
+	set_bit(ACT_OFLD_CONN, &ep->com.history);
+	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+/*
+ * Some of the error codes above implicitly indicate that there is no TID
+ * allocated with the result of an ACT_OPEN.  We use this predicate to make
+ * that explicit.
+ */
+static inline int act_open_has_tid(int status)
+{
+	return (status != CPL_ERR_TCAM_PARITY &&
+		status != CPL_ERR_TCAM_MISS &&
+		status != CPL_ERR_TCAM_FULL &&
+		status != CPL_ERR_CONN_EXIST_SYNRECV &&
+		status != CPL_ERR_CONN_EXIST);
+}
+
+static char *neg_adv_str(unsigned int status)
+{
+	switch (status) {
+	case CPL_ERR_RTX_NEG_ADVICE:
+		return "Retransmit timeout";
+	case CPL_ERR_PERSIST_NEG_ADVICE:
+		return "Persist timeout";
+	case CPL_ERR_KEEPALV_NEG_ADVICE:
+		return "Keepalive timeout";
+	default:
+		return "Unknown";
+	}
+}
+
+static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
+{
+	ep->snd_win = snd_win;
+	ep->rcv_win = rcv_win;
+	pr_debug("snd_win %d rcv_win %d\n",
+		 ep->snd_win, ep->rcv_win);
+}
+
+#define ACT_OPEN_RETRY_COUNT 2
+
+static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
+		     struct dst_entry *dst, struct c4iw_dev *cdev,
+		     bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
+{
+	struct neighbour *n;
+	int err, step;
+	struct net_device *pdev;
+
+	n = dst_neigh_lookup(dst, peer_ip);
+	if (!n)
+		return -ENODEV;
+
+	rcu_read_lock();
+	err = -ENOMEM;
+	if (n->dev->flags & IFF_LOOPBACK) {
+		if (iptype == 4)
+			pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
+		else if (IS_ENABLED(CONFIG_IPV6))
+			for_each_netdev(&init_net, pdev) {
+				if (ipv6_chk_addr(&init_net,
+						  (struct in6_addr *)peer_ip,
+						  pdev, 1))
+					break;
+			}
+		else
+			pdev = NULL;
+
+		if (!pdev) {
+			err = -ENODEV;
+			goto out;
+		}
+		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
+					n, pdev, rt_tos2priority(tos));
+		if (!ep->l2t) {
+			dev_put(pdev);
+			goto out;
+		}
+		ep->mtu = pdev->mtu;
+		ep->tx_chan = cxgb4_port_chan(pdev);
+		ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
+		step = cdev->rdev.lldi.ntxq /
+			cdev->rdev.lldi.nchan;
+		ep->txq_idx = cxgb4_port_idx(pdev) * step;
+		step = cdev->rdev.lldi.nrxq /
+			cdev->rdev.lldi.nchan;
+		ep->ctrlq_idx = cxgb4_port_idx(pdev);
+		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
+			cxgb4_port_idx(pdev) * step];
+		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
+		dev_put(pdev);
+	} else {
+		pdev = get_real_dev(n->dev);
+		ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
+					n, pdev, rt_tos2priority(tos));
+		if (!ep->l2t)
+			goto out;
+		ep->mtu = dst_mtu(dst);
+		ep->tx_chan = cxgb4_port_chan(pdev);
+		ep->smac_idx = ((struct port_info *)netdev_priv(pdev))->smt_idx;
+		step = cdev->rdev.lldi.ntxq /
+			cdev->rdev.lldi.nchan;
+		ep->txq_idx = cxgb4_port_idx(pdev) * step;
+		ep->ctrlq_idx = cxgb4_port_idx(pdev);
+		step = cdev->rdev.lldi.nrxq /
+			cdev->rdev.lldi.nchan;
+		ep->rss_qid = cdev->rdev.lldi.rxq_ids[
+			cxgb4_port_idx(pdev) * step];
+		set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
+
+		if (clear_mpa_v1) {
+			ep->retry_with_mpa_v1 = 0;
+			ep->tried_with_mpa_v1 = 0;
+		}
+	}
+	err = 0;
+out:
+	rcu_read_unlock();
+
+	neigh_release(n);
+
+	return err;
+}
+
+static int c4iw_reconnect(struct c4iw_ep *ep)
+{
+	int err = 0;
+	int size = 0;
+	struct sockaddr_in *laddr = (struct sockaddr_in *)
+				    &ep->com.cm_id->m_local_addr;
+	struct sockaddr_in *raddr = (struct sockaddr_in *)
+				    &ep->com.cm_id->m_remote_addr;
+	struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
+				      &ep->com.cm_id->m_local_addr;
+	struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
+				      &ep->com.cm_id->m_remote_addr;
+	int iptype;
+	__u8 *ra;
+
+	pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id);
+	c4iw_init_wr_wait(ep->com.wr_waitp);
+
+	/* When MPA revision is different on nodes, the node with MPA_rev=2
+	 * tries to reconnect with MPA_rev 1 for the same EP through
+	 * c4iw_reconnect(), where the same EP is assigned with new tid for
+	 * further connection establishment. As we are using the same EP pointer
+	 * for reconnect, few skbs are used during the previous c4iw_connect(),
+	 * which leaves the EP with inadequate skbs for further
+	 * c4iw_reconnect(), Further causing a crash due to an empty
+	 * skb_list() during peer_abort(). Allocate skbs which is already used.
+	 */
+	size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
+	if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
+		err = -ENOMEM;
+		goto fail1;
+	}
+
+	/*
+	 * Allocate an active TID to initiate a TCP connection.
+	 */
+	ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
+	if (ep->atid == -1) {
+		pr_err("%s - cannot alloc atid\n", __func__);
+		err = -ENOMEM;
+		goto fail2;
+	}
+	err = xa_insert_irq(&ep->com.dev->atids, ep->atid, ep, GFP_KERNEL);
+	if (err)
+		goto fail2a;
+
+	/* find a route */
+	if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
+		ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev,
+					  laddr->sin_addr.s_addr,
+					  raddr->sin_addr.s_addr,
+					  laddr->sin_port,
+					  raddr->sin_port, ep->com.cm_id->tos);
+		iptype = 4;
+		ra = (__u8 *)&raddr->sin_addr;
+	} else {
+		ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi,
+					   get_real_dev,
+					   laddr6->sin6_addr.s6_addr,
+					   raddr6->sin6_addr.s6_addr,
+					   laddr6->sin6_port,
+					   raddr6->sin6_port,
+					   ep->com.cm_id->tos,
+					   raddr6->sin6_scope_id);
+		iptype = 6;
+		ra = (__u8 *)&raddr6->sin6_addr;
+	}
+	if (!ep->dst) {
+		pr_err("%s - cannot find route\n", __func__);
+		err = -EHOSTUNREACH;
+		goto fail3;
+	}
+	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
+			ep->com.dev->rdev.lldi.adapter_type,
+			ep->com.cm_id->tos);
+	if (err) {
+		pr_err("%s - cannot alloc l2e\n", __func__);
+		goto fail4;
+	}
+
+	pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
+		 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
+		 ep->l2t->idx);
+
+	state_set(&ep->com, CONNECTING);
+	ep->tos = ep->com.cm_id->tos;
+
+	/* send connect request to rnic */
+	err = send_connect(ep);
+	if (!err)
+		goto out;
+
+	cxgb4_l2t_release(ep->l2t);
+fail4:
+	dst_release(ep->dst);
+fail3:
+	xa_erase_irq(&ep->com.dev->atids, ep->atid);
+fail2a:
+	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+fail2:
+	/*
+	 * remember to send notification to upper layer.
+	 * We are in here so the upper layer is not aware that this is
+	 * re-connect attempt and so, upper layer is still waiting for
+	 * response of 1st connect request.
+	 */
+	connect_reply_upcall(ep, -ECONNRESET);
+fail1:
+	c4iw_put_ep(&ep->com);
+out:
+	return err;
+}
+
+static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct cpl_act_open_rpl *rpl = cplhdr(skb);
+	unsigned int atid = TID_TID_G(AOPEN_ATID_G(
+				      ntohl(rpl->atid_status)));
+	struct tid_info *t = dev->rdev.lldi.tids;
+	int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
+	struct sockaddr_in *la;
+	struct sockaddr_in *ra;
+	struct sockaddr_in6 *la6;
+	struct sockaddr_in6 *ra6;
+	int ret = 0;
+
+	ep = lookup_atid(t, atid);
+	la = (struct sockaddr_in *)&ep->com.local_addr;
+	ra = (struct sockaddr_in *)&ep->com.remote_addr;
+	la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
+	ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
+
+	pr_debug("ep %p atid %u status %u errno %d\n", ep, atid,
+		 status, status2errno(status));
+
+	if (cxgb_is_neg_adv(status)) {
+		pr_debug("Connection problems for atid %u status %u (%s)\n",
+			 atid, status, neg_adv_str(status));
+		ep->stats.connect_neg_adv++;
+		mutex_lock(&dev->rdev.stats.lock);
+		dev->rdev.stats.neg_adv++;
+		mutex_unlock(&dev->rdev.stats.lock);
+		return 0;
+	}
+
+	set_bit(ACT_OPEN_RPL, &ep->com.history);
+
+	/*
+	 * Log interesting failures.
+	 */
+	switch (status) {
+	case CPL_ERR_CONN_RESET:
+	case CPL_ERR_CONN_TIMEDOUT:
+		break;
+	case CPL_ERR_TCAM_FULL:
+		mutex_lock(&dev->rdev.stats.lock);
+		dev->rdev.stats.tcam_full++;
+		mutex_unlock(&dev->rdev.stats.lock);
+		if (ep->com.local_addr.ss_family == AF_INET &&
+		    dev->rdev.lldi.enable_fw_ofld_conn) {
+			ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
+						   ntohl(rpl->atid_status))));
+			if (ret)
+				goto fail;
+			return 0;
+		}
+		break;
+	case CPL_ERR_CONN_EXIST:
+		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+			set_bit(ACT_RETRY_INUSE, &ep->com.history);
+			if (ep->com.remote_addr.ss_family == AF_INET6) {
+				struct sockaddr_in6 *sin6 =
+						(struct sockaddr_in6 *)
+						&ep->com.local_addr;
+				cxgb4_clip_release(
+						ep->com.dev->rdev.lldi.ports[0],
+						(const u32 *)
+						&sin6->sin6_addr.s6_addr, 1);
+			}
+			xa_erase_irq(&ep->com.dev->atids, atid);
+			cxgb4_free_atid(t, atid);
+			dst_release(ep->dst);
+			cxgb4_l2t_release(ep->l2t);
+			c4iw_reconnect(ep);
+			return 0;
+		}
+		break;
+	default:
+		if (ep->com.local_addr.ss_family == AF_INET) {
+			pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
+				atid, status, status2errno(status),
+				&la->sin_addr.s_addr, ntohs(la->sin_port),
+				&ra->sin_addr.s_addr, ntohs(ra->sin_port));
+		} else {
+			pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
+				atid, status, status2errno(status),
+				la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
+				ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
+		}
+		break;
+	}
+
+fail:
+	connect_reply_upcall(ep, status2errno(status));
+	state_set(&ep->com, DEAD);
+
+	if (ep->com.remote_addr.ss_family == AF_INET6) {
+		struct sockaddr_in6 *sin6 =
+			(struct sockaddr_in6 *)&ep->com.local_addr;
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+	}
+	if (status && act_open_has_tid(status))
+		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl),
+				 ep->com.local_addr.ss_family);
+
+	xa_erase_irq(&ep->com.dev->atids, atid);
+	cxgb4_free_atid(t, atid);
+	dst_release(ep->dst);
+	cxgb4_l2t_release(ep->l2t);
+	c4iw_put_ep(&ep->com);
+
+	return 0;
+}
+
+static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_pass_open_rpl *rpl = cplhdr(skb);
+	unsigned int stid = GET_TID(rpl);
+	struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
+
+	if (!ep) {
+		pr_warn("%s stid %d lookup failure!\n", __func__, stid);
+		goto out;
+	}
+	pr_debug("ep %p status %d error %d\n", ep,
+		 rpl->status, status2errno(rpl->status));
+	c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
+	c4iw_put_ep(&ep->com);
+out:
+	return 0;
+}
+
+static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
+	unsigned int stid = GET_TID(rpl);
+	struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
+
+	if (!ep) {
+		pr_warn("%s stid %d lookup failure!\n", __func__, stid);
+		goto out;
+	}
+	pr_debug("ep %p\n", ep);
+	c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status));
+	c4iw_put_ep(&ep->com);
+out:
+	return 0;
+}
+
+static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
+		     struct cpl_pass_accept_req *req)
+{
+	struct cpl_pass_accept_rpl *rpl;
+	unsigned int mtu_idx;
+	u64 opt0;
+	u32 opt2;
+	u32 wscale;
+	struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
+	int win;
+	enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+		      enable_tcp_timestamps && req->tcpopt.tstamp,
+		      (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1);
+	wscale = cxgb_compute_wscale(rcv_win);
+
+	/*
+	 * Specify the largest window that will fit in opt0. The
+	 * remainder will be specified in the rx_data_ack.
+	 */
+	win = ep->rcv_win >> 10;
+	if (win > RCV_BUFSIZ_M)
+		win = RCV_BUFSIZ_M;
+	opt0 = (nocong ? NO_CONG_F : 0) |
+	       KEEP_ALIVE_F |
+	       DELACK_F |
+	       WND_SCALE_V(wscale) |
+	       MSS_IDX_V(mtu_idx) |
+	       L2T_IDX_V(ep->l2t->idx) |
+	       TX_CHAN_V(ep->tx_chan) |
+	       SMAC_SEL_V(ep->smac_idx) |
+	       DSCP_V(ep->tos >> 2) |
+	       ULP_MODE_V(ULP_MODE_TCPDDP) |
+	       RCV_BUFSIZ_V(win);
+	opt2 = RX_CHANNEL_V(0) |
+	       RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
+
+	if (enable_tcp_timestamps && req->tcpopt.tstamp)
+		opt2 |= TSTAMPS_EN_F;
+	if (enable_tcp_sack && req->tcpopt.sack)
+		opt2 |= SACK_EN_F;
+	if (wscale && enable_tcp_window_scaling)
+		opt2 |= WND_SCALE_EN_F;
+	if (enable_ecn) {
+		const struct tcphdr *tcph;
+		u32 hlen = ntohl(req->hdr_len);
+
+		if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
+			tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
+				IP_HDR_LEN_G(hlen);
+		else
+			tcph = (const void *)(req + 1) +
+				T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
+		if (tcph->ece && tcph->cwr)
+			opt2 |= CCTRL_ECN_V(1);
+	}
+
+	if (!is_t4(adapter_type)) {
+		u32 isn = (get_random_u32() & ~7UL) - 1;
+
+		skb = get_skb(skb, roundup(sizeof(*rpl5), 16), GFP_KERNEL);
+		rpl5 = __skb_put_zero(skb, roundup(sizeof(*rpl5), 16));
+		rpl = (void *)rpl5;
+		INIT_TP_WR_CPL(rpl5, CPL_PASS_ACCEPT_RPL, ep->hwtid);
+		opt2 |= T5_OPT_2_VALID_F;
+		opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
+		opt2 |= T5_ISS_F;
+		if (peer2peer)
+			isn += 4;
+		rpl5->iss = cpu_to_be32(isn);
+		pr_debug("iss %u\n", be32_to_cpu(rpl5->iss));
+	} else {
+		skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
+		rpl = __skb_put_zero(skb, sizeof(*rpl));
+		INIT_TP_WR_CPL(rpl, CPL_PASS_ACCEPT_RPL, ep->hwtid);
+	}
+
+	rpl->opt0 = cpu_to_be64(opt0);
+	rpl->opt2 = cpu_to_be32(opt2);
+	set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
+	t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
+
+	return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
+{
+	pr_debug("c4iw_dev %p tid %u\n", dev, hwtid);
+	skb_trim(skb, sizeof(struct cpl_tid_release));
+	release_tid(&dev->rdev, hwtid, skb);
+	return;
+}
+
+static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *child_ep = NULL, *parent_ep;
+	struct cpl_pass_accept_req *req = cplhdr(skb);
+	unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
+	struct tid_info *t = dev->rdev.lldi.tids;
+	unsigned int hwtid = GET_TID(req);
+	struct dst_entry *dst;
+	__u8 local_ip[16], peer_ip[16];
+	__be16 local_port, peer_port;
+	struct sockaddr_in6 *sin6;
+	int err;
+	u16 peer_mss = ntohs(req->tcpopt.mss);
+	int iptype;
+	unsigned short hdrs;
+	u8 tos;
+
+	parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
+	if (!parent_ep) {
+		pr_err("%s connect request on invalid stid %d\n",
+		       __func__, stid);
+		goto reject;
+	}
+
+	if (state_read(&parent_ep->com) != LISTEN) {
+		pr_err("%s - listening ep not in LISTEN\n", __func__);
+		goto reject;
+	}
+
+	if (parent_ep->com.cm_id->tos_set)
+		tos = parent_ep->com.cm_id->tos;
+	else
+		tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
+
+	cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type,
+			&iptype, local_ip, peer_ip, &local_port, &peer_port);
+
+	/* Find output route */
+	if (iptype == 4)  {
+		pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
+			 , parent_ep, hwtid,
+			 local_ip, peer_ip, ntohs(local_port),
+			 ntohs(peer_port), peer_mss);
+		dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
+				      *(__be32 *)local_ip, *(__be32 *)peer_ip,
+				      local_port, peer_port, tos);
+	} else {
+		pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
+			 , parent_ep, hwtid,
+			 local_ip, peer_ip, ntohs(local_port),
+			 ntohs(peer_port), peer_mss);
+		dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
+				local_ip, peer_ip, local_port, peer_port,
+				tos,
+				((struct sockaddr_in6 *)
+				 &parent_ep->com.local_addr)->sin6_scope_id);
+	}
+	if (!dst) {
+		pr_err("%s - failed to find dst entry!\n", __func__);
+		goto reject;
+	}
+
+	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
+	if (!child_ep) {
+		pr_err("%s - failed to allocate ep entry!\n", __func__);
+		dst_release(dst);
+		goto reject;
+	}
+
+	err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
+			parent_ep->com.dev->rdev.lldi.adapter_type, tos);
+	if (err) {
+		pr_err("%s - failed to allocate l2t entry!\n", __func__);
+		dst_release(dst);
+		kfree(child_ep);
+		goto reject;
+	}
+
+	hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) +
+	       sizeof(struct tcphdr) +
+	       ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
+	if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
+		child_ep->mtu = peer_mss + hdrs;
+
+	skb_queue_head_init(&child_ep->com.ep_skb_list);
+	if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
+		goto fail;
+
+	state_set(&child_ep->com, CONNECTING);
+	child_ep->com.dev = dev;
+	child_ep->com.cm_id = NULL;
+
+	if (iptype == 4) {
+		struct sockaddr_in *sin = (struct sockaddr_in *)
+			&child_ep->com.local_addr;
+
+		sin->sin_family = AF_INET;
+		sin->sin_port = local_port;
+		sin->sin_addr.s_addr = *(__be32 *)local_ip;
+
+		sin = (struct sockaddr_in *)&child_ep->com.local_addr;
+		sin->sin_family = AF_INET;
+		sin->sin_port = ((struct sockaddr_in *)
+				 &parent_ep->com.local_addr)->sin_port;
+		sin->sin_addr.s_addr = *(__be32 *)local_ip;
+
+		sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
+		sin->sin_family = AF_INET;
+		sin->sin_port = peer_port;
+		sin->sin_addr.s_addr = *(__be32 *)peer_ip;
+	} else {
+		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
+		sin6->sin6_family = PF_INET6;
+		sin6->sin6_port = local_port;
+		memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
+
+		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
+		sin6->sin6_family = PF_INET6;
+		sin6->sin6_port = ((struct sockaddr_in6 *)
+				   &parent_ep->com.local_addr)->sin6_port;
+		memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
+
+		sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
+		sin6->sin6_family = PF_INET6;
+		sin6->sin6_port = peer_port;
+		memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
+	}
+
+	c4iw_get_ep(&parent_ep->com);
+	child_ep->parent_ep = parent_ep;
+	child_ep->tos = tos;
+	child_ep->dst = dst;
+	child_ep->hwtid = hwtid;
+
+	pr_debug("tx_chan %u smac_idx %u rss_qid %u\n",
+		 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
+
+	timer_setup(&child_ep->timer, ep_timeout, 0);
+	cxgb4_insert_tid(t, child_ep, hwtid,
+			 child_ep->com.local_addr.ss_family);
+	insert_ep_tid(child_ep);
+	if (accept_cr(child_ep, skb, req)) {
+		c4iw_put_ep(&parent_ep->com);
+		release_ep_resources(child_ep);
+	} else {
+		set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
+	}
+	if (iptype == 6) {
+		sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
+		cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
+			       (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+	}
+	goto out;
+fail:
+	c4iw_put_ep(&child_ep->com);
+reject:
+	reject_cr(dev, hwtid, skb);
+out:
+	if (parent_ep)
+		c4iw_put_ep(&parent_ep->com);
+	return 0;
+}
+
+static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct cpl_pass_establish *req = cplhdr(skb);
+	unsigned int tid = GET_TID(req);
+	int ret;
+	u16 tcp_opt = ntohs(req->tcp_opt);
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	ep->snd_seq = be32_to_cpu(req->snd_isn);
+	ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+	ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt);
+
+	pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt);
+
+	set_emss(ep, tcp_opt);
+
+	dst_confirm(ep->dst);
+	mutex_lock(&ep->com.mutex);
+	ep->com.state = MPA_REQ_WAIT;
+	start_ep_timer(ep);
+	set_bit(PASS_ESTAB, &ep->com.history);
+	ret = send_flowc(ep);
+	mutex_unlock(&ep->com.mutex);
+	if (ret)
+		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
+	c4iw_put_ep(&ep->com);
+
+	return 0;
+}
+
+static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_peer_close *hdr = cplhdr(skb);
+	struct c4iw_ep *ep;
+	struct c4iw_qp_attributes attrs;
+	int disconnect = 1;
+	int release = 0;
+	unsigned int tid = GET_TID(hdr);
+	int ret;
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+	dst_confirm(ep->dst);
+
+	set_bit(PEER_CLOSE, &ep->com.history);
+	mutex_lock(&ep->com.mutex);
+	switch (ep->com.state) {
+	case MPA_REQ_WAIT:
+		__state_set(&ep->com, CLOSING);
+		break;
+	case MPA_REQ_SENT:
+		__state_set(&ep->com, CLOSING);
+		connect_reply_upcall(ep, -ECONNRESET);
+		break;
+	case MPA_REQ_RCVD:
+
+		/*
+		 * We're gonna mark this puppy DEAD, but keep
+		 * the reference on it until the ULP accepts or
+		 * rejects the CR. Also wake up anyone waiting
+		 * in rdma connection migration (see c4iw_accept_cr()).
+		 */
+		__state_set(&ep->com, CLOSING);
+		pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
+		c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
+		break;
+	case MPA_REP_SENT:
+		__state_set(&ep->com, CLOSING);
+		pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid);
+		c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
+		break;
+	case FPDU_MODE:
+		start_ep_timer(ep);
+		__state_set(&ep->com, CLOSING);
+		attrs.next_state = C4IW_QP_STATE_CLOSING;
+		ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		if (ret != -ECONNRESET) {
+			peer_close_upcall(ep);
+			disconnect = 1;
+		}
+		break;
+	case ABORTING:
+		disconnect = 0;
+		break;
+	case CLOSING:
+		__state_set(&ep->com, MORIBUND);
+		disconnect = 0;
+		break;
+	case MORIBUND:
+		(void)stop_ep_timer(ep);
+		if (ep->com.cm_id && ep->com.qp) {
+			attrs.next_state = C4IW_QP_STATE_IDLE;
+			c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		}
+		close_complete_upcall(ep, 0);
+		__state_set(&ep->com, DEAD);
+		release = 1;
+		disconnect = 0;
+		break;
+	case DEAD:
+		disconnect = 0;
+		break;
+	default:
+		WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
+	}
+	mutex_unlock(&ep->com.mutex);
+	if (disconnect)
+		c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+	if (release)
+		release_ep_resources(ep);
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+static void finish_peer_abort(struct c4iw_dev *dev, struct c4iw_ep *ep)
+{
+	complete_cached_srq_buffers(ep, ep->srqe_idx);
+	if (ep->com.cm_id && ep->com.qp) {
+		struct c4iw_qp_attributes attrs;
+
+		attrs.next_state = C4IW_QP_STATE_ERROR;
+		c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+			       C4IW_QP_ATTR_NEXT_STATE,	&attrs, 1);
+	}
+	peer_abort_upcall(ep);
+	release_ep_resources(ep);
+	c4iw_put_ep(&ep->com);
+}
+
+static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_abort_req_rss6 *req = cplhdr(skb);
+	struct c4iw_ep *ep;
+	struct sk_buff *rpl_skb;
+	struct c4iw_qp_attributes attrs;
+	int ret;
+	int release = 0;
+	unsigned int tid = GET_TID(req);
+	u8 status;
+	u32 srqidx;
+
+	u32 len = roundup(sizeof(struct cpl_abort_rpl), 16);
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+
+	status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status));
+
+	if (cxgb_is_neg_adv(status)) {
+		pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
+			 ep->hwtid, status, neg_adv_str(status));
+		ep->stats.abort_neg_adv++;
+		mutex_lock(&dev->rdev.stats.lock);
+		dev->rdev.stats.neg_adv++;
+		mutex_unlock(&dev->rdev.stats.lock);
+		goto deref_ep;
+	}
+
+	pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid,
+		 ep->com.state);
+	set_bit(PEER_ABORT, &ep->com.history);
+
+	/*
+	 * Wake up any threads in rdma_init() or rdma_fini().
+	 * However, this is not needed if com state is just
+	 * MPA_REQ_SENT
+	 */
+	if (ep->com.state != MPA_REQ_SENT)
+		c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
+
+	mutex_lock(&ep->com.mutex);
+	switch (ep->com.state) {
+	case CONNECTING:
+		c4iw_put_ep(&ep->parent_ep->com);
+		break;
+	case MPA_REQ_WAIT:
+		(void)stop_ep_timer(ep);
+		break;
+	case MPA_REQ_SENT:
+		(void)stop_ep_timer(ep);
+		if (status != CPL_ERR_CONN_RESET || mpa_rev == 1 ||
+		    (mpa_rev == 2 && ep->tried_with_mpa_v1))
+			connect_reply_upcall(ep, -ECONNRESET);
+		else {
+			/*
+			 * we just don't send notification upwards because we
+			 * want to retry with mpa_v1 without upper layers even
+			 * knowing it.
+			 *
+			 * do some housekeeping so as to re-initiate the
+			 * connection
+			 */
+			pr_info("%s: mpa_rev=%d. Retrying with mpav1\n",
+				__func__, mpa_rev);
+			ep->retry_with_mpa_v1 = 1;
+		}
+		break;
+	case MPA_REP_SENT:
+		break;
+	case MPA_REQ_RCVD:
+		break;
+	case MORIBUND:
+	case CLOSING:
+		stop_ep_timer(ep);
+		fallthrough;
+	case FPDU_MODE:
+		if (ep->com.qp && ep->com.qp->srq) {
+			srqidx = ABORT_RSS_SRQIDX_G(
+					be32_to_cpu(req->srqidx_status));
+			if (srqidx) {
+				complete_cached_srq_buffers(ep, srqidx);
+			} else {
+				/* Hold ep ref until finish_peer_abort() */
+				c4iw_get_ep(&ep->com);
+				__state_set(&ep->com, ABORTING);
+				set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags);
+				read_tcb(ep);
+				break;
+
+			}
+		}
+
+		if (ep->com.cm_id && ep->com.qp) {
+			attrs.next_state = C4IW_QP_STATE_ERROR;
+			ret = c4iw_modify_qp(ep->com.qp->rhp,
+				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+				     &attrs, 1);
+			if (ret)
+				pr_err("%s - qp <- error failed!\n", __func__);
+		}
+		peer_abort_upcall(ep);
+		break;
+	case ABORTING:
+		break;
+	case DEAD:
+		pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
+		mutex_unlock(&ep->com.mutex);
+		goto deref_ep;
+	default:
+		WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
+		break;
+	}
+	dst_confirm(ep->dst);
+	if (ep->com.state != ABORTING) {
+		__state_set(&ep->com, DEAD);
+		/* we don't release if we want to retry with mpa_v1 */
+		if (!ep->retry_with_mpa_v1)
+			release = 1;
+	}
+	mutex_unlock(&ep->com.mutex);
+
+	rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
+	if (WARN_ON(!rpl_skb)) {
+		release = 1;
+		goto out;
+	}
+
+	cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx);
+
+	c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
+out:
+	if (release)
+		release_ep_resources(ep);
+	else if (ep->retry_with_mpa_v1) {
+		if (ep->com.remote_addr.ss_family == AF_INET6) {
+			struct sockaddr_in6 *sin6 =
+					(struct sockaddr_in6 *)
+					&ep->com.local_addr;
+			cxgb4_clip_release(
+					ep->com.dev->rdev.lldi.ports[0],
+					(const u32 *)&sin6->sin6_addr.s6_addr,
+					1);
+		}
+		xa_erase_irq(&ep->com.dev->hwtids, ep->hwtid);
+		cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid,
+				 ep->com.local_addr.ss_family);
+		dst_release(ep->dst);
+		cxgb4_l2t_release(ep->l2t);
+		c4iw_reconnect(ep);
+	}
+
+deref_ep:
+	c4iw_put_ep(&ep->com);
+	/* Dereferencing ep, referenced in peer_abort_intr() */
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct c4iw_qp_attributes attrs;
+	struct cpl_close_con_rpl *rpl = cplhdr(skb);
+	int release = 0;
+	unsigned int tid = GET_TID(rpl);
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+
+	/* The cm_id may be null if we failed to connect */
+	mutex_lock(&ep->com.mutex);
+	set_bit(CLOSE_CON_RPL, &ep->com.history);
+	switch (ep->com.state) {
+	case CLOSING:
+		__state_set(&ep->com, MORIBUND);
+		break;
+	case MORIBUND:
+		(void)stop_ep_timer(ep);
+		if ((ep->com.cm_id) && (ep->com.qp)) {
+			attrs.next_state = C4IW_QP_STATE_IDLE;
+			c4iw_modify_qp(ep->com.qp->rhp,
+					     ep->com.qp,
+					     C4IW_QP_ATTR_NEXT_STATE,
+					     &attrs, 1);
+		}
+		close_complete_upcall(ep, 0);
+		__state_set(&ep->com, DEAD);
+		release = 1;
+		break;
+	case ABORTING:
+	case DEAD:
+		break;
+	default:
+		WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
+		break;
+	}
+	mutex_unlock(&ep->com.mutex);
+	if (release)
+		release_ep_resources(ep);
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_rdma_terminate *rpl = cplhdr(skb);
+	unsigned int tid = GET_TID(rpl);
+	struct c4iw_ep *ep;
+	struct c4iw_qp_attributes attrs;
+
+	ep = get_ep_from_tid(dev, tid);
+
+	if (ep) {
+		if (ep->com.qp) {
+			pr_warn("TERM received tid %u qpid %u\n", tid,
+				ep->com.qp->wq.sq.qid);
+			attrs.next_state = C4IW_QP_STATE_TERMINATE;
+			c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+				       C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+		}
+
+		/* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3,
+		 * when entering the TERM state the RNIC MUST initiate a CLOSE.
+		 */
+		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
+		c4iw_put_ep(&ep->com);
+	} else
+		pr_warn("TERM received tid %u no ep/qp\n", tid);
+
+	return 0;
+}
+
+/*
+ * Upcall from the adapter indicating data has been transmitted.
+ * For us its just the single MPA request or reply.  We can now free
+ * the skb holding the mpa message.
+ */
+static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct c4iw_ep *ep;
+	struct cpl_fw4_ack *hdr = cplhdr(skb);
+	u8 credits = hdr->credits;
+	unsigned int tid = GET_TID(hdr);
+
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+	pr_debug("ep %p tid %u credits %u\n",
+		 ep, ep->hwtid, credits);
+	if (credits == 0) {
+		pr_debug("0 credit ack ep %p tid %u state %u\n",
+			 ep, ep->hwtid, state_read(&ep->com));
+		goto out;
+	}
+
+	dst_confirm(ep->dst);
+	if (ep->mpa_skb) {
+		pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n",
+			 ep, ep->hwtid, state_read(&ep->com),
+			 ep->mpa_attr.initiator ? 1 : 0);
+		mutex_lock(&ep->com.mutex);
+		kfree_skb(ep->mpa_skb);
+		ep->mpa_skb = NULL;
+		if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
+			stop_ep_timer(ep);
+		mutex_unlock(&ep->com.mutex);
+	}
+out:
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+	int abort;
+	struct c4iw_ep *ep = to_ep(cm_id);
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+
+	mutex_lock(&ep->com.mutex);
+	if (ep->com.state != MPA_REQ_RCVD) {
+		mutex_unlock(&ep->com.mutex);
+		c4iw_put_ep(&ep->com);
+		return -ECONNRESET;
+	}
+	set_bit(ULP_REJECT, &ep->com.history);
+	if (mpa_rev == 0)
+		abort = 1;
+	else
+		abort = send_mpa_reject(ep, pdata, pdata_len);
+	mutex_unlock(&ep->com.mutex);
+
+	stop_ep_timer(ep);
+	c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
+	c4iw_put_ep(&ep->com);
+	return 0;
+}
+
+int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+	int err;
+	struct c4iw_qp_attributes attrs;
+	enum c4iw_qp_attr_mask mask;
+	struct c4iw_ep *ep = to_ep(cm_id);
+	struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
+	struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
+	int abort = 0;
+
+	pr_debug("ep %p tid %u\n", ep, ep->hwtid);
+
+	mutex_lock(&ep->com.mutex);
+	if (ep->com.state != MPA_REQ_RCVD) {
+		err = -ECONNRESET;
+		goto err_out;
+	}
+
+	if (!qp) {
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	set_bit(ULP_ACCEPT, &ep->com.history);
+	if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
+	    (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
+		err = -EINVAL;
+		goto err_abort;
+	}
+
+	if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+		if (conn_param->ord > ep->ird) {
+			if (RELAXED_IRD_NEGOTIATION) {
+				conn_param->ord = ep->ird;
+			} else {
+				ep->ird = conn_param->ird;
+				ep->ord = conn_param->ord;
+				send_mpa_reject(ep, conn_param->private_data,
+						conn_param->private_data_len);
+				err = -ENOMEM;
+				goto err_abort;
+			}
+		}
+		if (conn_param->ird < ep->ord) {
+			if (RELAXED_IRD_NEGOTIATION &&
+			    ep->ord <= h->rdev.lldi.max_ordird_qp) {
+				conn_param->ird = ep->ord;
+			} else {
+				err = -ENOMEM;
+				goto err_abort;
+			}
+		}
+	}
+	ep->ird = conn_param->ird;
+	ep->ord = conn_param->ord;
+
+	if (ep->mpa_attr.version == 1) {
+		if (peer2peer && ep->ird == 0)
+			ep->ird = 1;
+	} else {
+		if (peer2peer &&
+		    (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
+		    (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
+			ep->ird = 1;
+	}
+
+	pr_debug("ird %d ord %d\n", ep->ird, ep->ord);
+
+	ep->com.cm_id = cm_id;
+	ref_cm_id(&ep->com);
+	ep->com.qp = qp;
+	ref_qp(ep);
+
+	/* bind QP to EP and move to RTS */
+	attrs.mpa_attr = ep->mpa_attr;
+	attrs.max_ird = ep->ird;
+	attrs.max_ord = ep->ord;
+	attrs.llp_stream_handle = ep;
+	attrs.next_state = C4IW_QP_STATE_RTS;
+
+	/* bind QP and TID with INIT_WR */
+	mask = C4IW_QP_ATTR_NEXT_STATE |
+			     C4IW_QP_ATTR_LLP_STREAM_HANDLE |
+			     C4IW_QP_ATTR_MPA_ATTR |
+			     C4IW_QP_ATTR_MAX_IRD |
+			     C4IW_QP_ATTR_MAX_ORD;
+
+	err = c4iw_modify_qp(ep->com.qp->rhp,
+			     ep->com.qp, mask, &attrs, 1);
+	if (err)
+		goto err_deref_cm_id;
+
+	set_bit(STOP_MPA_TIMER, &ep->com.flags);
+	err = send_mpa_reply(ep, conn_param->private_data,
+			     conn_param->private_data_len);
+	if (err)
+		goto err_deref_cm_id;
+
+	__state_set(&ep->com, FPDU_MODE);
+	established_upcall(ep);
+	mutex_unlock(&ep->com.mutex);
+	c4iw_put_ep(&ep->com);
+	return 0;
+err_deref_cm_id:
+	deref_cm_id(&ep->com);
+err_abort:
+	abort = 1;
+err_out:
+	mutex_unlock(&ep->com.mutex);
+	if (abort)
+		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
+	c4iw_put_ep(&ep->com);
+	return err;
+}
+
+static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
+{
+	struct in_device *ind;
+	int found = 0;
+	struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
+	struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
+	const struct in_ifaddr *ifa;
+
+	ind = in_dev_get(dev->rdev.lldi.ports[0]);
+	if (!ind)
+		return -EADDRNOTAVAIL;
+	rcu_read_lock();
+	in_dev_for_each_ifa_rcu(ifa, ind) {
+		if (ifa->ifa_flags & IFA_F_SECONDARY)
+			continue;
+		laddr->sin_addr.s_addr = ifa->ifa_address;
+		raddr->sin_addr.s_addr = ifa->ifa_address;
+		found = 1;
+		break;
+	}
+	rcu_read_unlock();
+
+	in_dev_put(ind);
+	return found ? 0 : -EADDRNOTAVAIL;
+}
+
+static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
+		      unsigned char banned_flags)
+{
+	struct inet6_dev *idev;
+	int err = -EADDRNOTAVAIL;
+
+	rcu_read_lock();
+	idev = __in6_dev_get(dev);
+	if (idev != NULL) {
+		struct inet6_ifaddr *ifp;
+
+		read_lock_bh(&idev->lock);
+		list_for_each_entry(ifp, &idev->addr_list, if_list) {
+			if (ifp->scope == IFA_LINK &&
+			    !(ifp->flags & banned_flags)) {
+				memcpy(addr, &ifp->addr, 16);
+				err = 0;
+				break;
+			}
+		}
+		read_unlock_bh(&idev->lock);
+	}
+	rcu_read_unlock();
+	return err;
+}
+
+static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
+{
+	struct in6_addr addr;
+	struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
+	struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
+
+	if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
+		memcpy(la6->sin6_addr.s6_addr, &addr, 16);
+		memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
+		return 0;
+	}
+	return -EADDRNOTAVAIL;
+}
+
+int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+	struct c4iw_ep *ep;
+	int err = 0;
+	struct sockaddr_in *laddr;
+	struct sockaddr_in *raddr;
+	struct sockaddr_in6 *laddr6;
+	struct sockaddr_in6 *raddr6;
+	__u8 *ra;
+	int iptype;
+
+	if ((conn_param->ord > cur_max_read_depth(dev)) ||
+	    (conn_param->ird > cur_max_read_depth(dev))) {
+		err = -EINVAL;
+		goto out;
+	}
+	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+	if (!ep) {
+		pr_err("%s - cannot alloc ep\n", __func__);
+		err = -ENOMEM;
+		goto out;
+	}
+
+	skb_queue_head_init(&ep->com.ep_skb_list);
+	if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
+		err = -ENOMEM;
+		goto fail1;
+	}
+
+	timer_setup(&ep->timer, ep_timeout, 0);
+	ep->plen = conn_param->private_data_len;
+	if (ep->plen)
+		memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
+		       conn_param->private_data, ep->plen);
+	ep->ird = conn_param->ird;
+	ep->ord = conn_param->ord;
+
+	if (peer2peer && ep->ord == 0)
+		ep->ord = 1;
+
+	ep->com.cm_id = cm_id;
+	ref_cm_id(&ep->com);
+	cm_id->provider_data = ep;
+	ep->com.dev = dev;
+	ep->com.qp = get_qhp(dev, conn_param->qpn);
+	if (!ep->com.qp) {
+		pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
+		err = -EINVAL;
+		goto fail2;
+	}
+	ref_qp(ep);
+	pr_debug("qpn 0x%x qp %p cm_id %p\n", conn_param->qpn,
+		 ep->com.qp, cm_id);
+
+	/*
+	 * Allocate an active TID to initiate a TCP connection.
+	 */
+	ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
+	if (ep->atid == -1) {
+		pr_err("%s - cannot alloc atid\n", __func__);
+		err = -ENOMEM;
+		goto fail2;
+	}
+	err = xa_insert_irq(&dev->atids, ep->atid, ep, GFP_KERNEL);
+	if (err)
+		goto fail5;
+
+	memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
+	       sizeof(ep->com.local_addr));
+	memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
+	       sizeof(ep->com.remote_addr));
+
+	laddr = (struct sockaddr_in *)&ep->com.local_addr;
+	raddr = (struct sockaddr_in *)&ep->com.remote_addr;
+	laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
+	raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
+
+	if (cm_id->m_remote_addr.ss_family == AF_INET) {
+		iptype = 4;
+		ra = (__u8 *)&raddr->sin_addr;
+
+		/*
+		 * Handle loopback requests to INADDR_ANY.
+		 */
+		if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
+			err = pick_local_ipaddrs(dev, cm_id);
+			if (err)
+				goto fail3;
+		}
+
+		/* find a route */
+		pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
+			 &laddr->sin_addr, ntohs(laddr->sin_port),
+			 ra, ntohs(raddr->sin_port));
+		ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
+					  laddr->sin_addr.s_addr,
+					  raddr->sin_addr.s_addr,
+					  laddr->sin_port,
+					  raddr->sin_port, cm_id->tos);
+	} else {
+		iptype = 6;
+		ra = (__u8 *)&raddr6->sin6_addr;
+
+		/*
+		 * Handle loopback requests to INADDR_ANY.
+		 */
+		if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
+			err = pick_local_ip6addrs(dev, cm_id);
+			if (err)
+				goto fail3;
+		}
+
+		/* find a route */
+		pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
+			 laddr6->sin6_addr.s6_addr,
+			 ntohs(laddr6->sin6_port),
+			 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
+		ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev,
+					   laddr6->sin6_addr.s6_addr,
+					   raddr6->sin6_addr.s6_addr,
+					   laddr6->sin6_port,
+					   raddr6->sin6_port, cm_id->tos,
+					   raddr6->sin6_scope_id);
+	}
+	if (!ep->dst) {
+		pr_err("%s - cannot find route\n", __func__);
+		err = -EHOSTUNREACH;
+		goto fail3;
+	}
+
+	err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
+			ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
+	if (err) {
+		pr_err("%s - cannot alloc l2e\n", __func__);
+		goto fail4;
+	}
+
+	pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
+		 ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
+		 ep->l2t->idx);
+
+	state_set(&ep->com, CONNECTING);
+	ep->tos = cm_id->tos;
+
+	/* send connect request to rnic */
+	err = send_connect(ep);
+	if (!err)
+		goto out;
+
+	cxgb4_l2t_release(ep->l2t);
+fail4:
+	dst_release(ep->dst);
+fail3:
+	xa_erase_irq(&ep->com.dev->atids, ep->atid);
+fail5:
+	cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+fail2:
+	skb_queue_purge(&ep->com.ep_skb_list);
+	deref_cm_id(&ep->com);
+fail1:
+	c4iw_put_ep(&ep->com);
+out:
+	return err;
+}
+
+static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
+{
+	int err;
+	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
+				    &ep->com.local_addr;
+
+	if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
+		err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
+				     (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+		if (err)
+			return err;
+	}
+	c4iw_init_wr_wait(ep->com.wr_waitp);
+	err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
+				   ep->stid, &sin6->sin6_addr,
+				   sin6->sin6_port,
+				   ep->com.dev->rdev.lldi.rxq_ids[0]);
+	if (!err)
+		err = c4iw_wait_for_reply(&ep->com.dev->rdev,
+					  ep->com.wr_waitp,
+					  0, 0, __func__);
+	else if (err > 0)
+		err = net_xmit_errno(err);
+	if (err) {
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+		pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
+		       err, ep->stid,
+		       sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
+	}
+	return err;
+}
+
+static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
+{
+	int err;
+	struct sockaddr_in *sin = (struct sockaddr_in *)
+				  &ep->com.local_addr;
+
+	if (dev->rdev.lldi.enable_fw_ofld_conn) {
+		do {
+			err = cxgb4_create_server_filter(
+				ep->com.dev->rdev.lldi.ports[0], ep->stid,
+				sin->sin_addr.s_addr, sin->sin_port, 0,
+				ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
+			if (err == -EBUSY) {
+				if (c4iw_fatal_error(&ep->com.dev->rdev)) {
+					err = -EIO;
+					break;
+				}
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule_timeout(usecs_to_jiffies(100));
+			}
+		} while (err == -EBUSY);
+	} else {
+		c4iw_init_wr_wait(ep->com.wr_waitp);
+		err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
+				ep->stid, sin->sin_addr.s_addr, sin->sin_port,
+				0, ep->com.dev->rdev.lldi.rxq_ids[0]);
+		if (!err)
+			err = c4iw_wait_for_reply(&ep->com.dev->rdev,
+						  ep->com.wr_waitp,
+						  0, 0, __func__);
+		else if (err > 0)
+			err = net_xmit_errno(err);
+	}
+	if (err)
+		pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
+		       , err, ep->stid,
+		       &sin->sin_addr, ntohs(sin->sin_port));
+	return err;
+}
+
+int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
+{
+	int err = 0;
+	struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+	struct c4iw_listen_ep *ep;
+
+	might_sleep();
+
+	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+	if (!ep) {
+		pr_err("%s - cannot alloc ep\n", __func__);
+		err = -ENOMEM;
+		goto fail1;
+	}
+	skb_queue_head_init(&ep->com.ep_skb_list);
+	pr_debug("ep %p\n", ep);
+	ep->com.cm_id = cm_id;
+	ref_cm_id(&ep->com);
+	ep->com.dev = dev;
+	ep->backlog = backlog;
+	memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
+	       sizeof(ep->com.local_addr));
+
+	/*
+	 * Allocate a server TID.
+	 */
+	if (dev->rdev.lldi.enable_fw_ofld_conn &&
+	    ep->com.local_addr.ss_family == AF_INET)
+		ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
+					     cm_id->m_local_addr.ss_family, ep);
+	else
+		ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
+					    cm_id->m_local_addr.ss_family, ep);
+
+	if (ep->stid == -1) {
+		pr_err("%s - cannot alloc stid\n", __func__);
+		err = -ENOMEM;
+		goto fail2;
+	}
+	err = xa_insert_irq(&dev->stids, ep->stid, ep, GFP_KERNEL);
+	if (err)
+		goto fail3;
+
+	state_set(&ep->com, LISTEN);
+	if (ep->com.local_addr.ss_family == AF_INET)
+		err = create_server4(dev, ep);
+	else
+		err = create_server6(dev, ep);
+	if (!err) {
+		cm_id->provider_data = ep;
+		goto out;
+	}
+	xa_erase_irq(&ep->com.dev->stids, ep->stid);
+fail3:
+	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
+			ep->com.local_addr.ss_family);
+fail2:
+	deref_cm_id(&ep->com);
+	c4iw_put_ep(&ep->com);
+fail1:
+out:
+	return err;
+}
+
+int c4iw_destroy_listen(struct iw_cm_id *cm_id)
+{
+	int err;
+	struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
+
+	pr_debug("ep %p\n", ep);
+
+	might_sleep();
+	state_set(&ep->com, DEAD);
+	if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
+	    ep->com.local_addr.ss_family == AF_INET) {
+		err = cxgb4_remove_server_filter(
+			ep->com.dev->rdev.lldi.ports[0], ep->stid,
+			ep->com.dev->rdev.lldi.rxq_ids[0], false);
+	} else {
+		struct sockaddr_in6 *sin6;
+		c4iw_init_wr_wait(ep->com.wr_waitp);
+		err = cxgb4_remove_server(
+				ep->com.dev->rdev.lldi.ports[0], ep->stid,
+				ep->com.dev->rdev.lldi.rxq_ids[0],
+				ep->com.local_addr.ss_family == AF_INET6);
+		if (err)
+			goto done;
+		err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp,
+					  0, 0, __func__);
+		sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+	}
+	xa_erase_irq(&ep->com.dev->stids, ep->stid);
+	cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
+			ep->com.local_addr.ss_family);
+done:
+	deref_cm_id(&ep->com);
+	c4iw_put_ep(&ep->com);
+	return err;
+}
+
+int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
+{
+	int ret = 0;
+	int close = 0;
+	int fatal = 0;
+	struct c4iw_rdev *rdev;
+
+	mutex_lock(&ep->com.mutex);
+
+	pr_debug("ep %p state %s, abrupt %d\n", ep,
+		 states[ep->com.state], abrupt);
+
+	/*
+	 * Ref the ep here in case we have fatal errors causing the
+	 * ep to be released and freed.
+	 */
+	c4iw_get_ep(&ep->com);
+
+	rdev = &ep->com.dev->rdev;
+	if (c4iw_fatal_error(rdev)) {
+		fatal = 1;
+		close_complete_upcall(ep, -EIO);
+		ep->com.state = DEAD;
+	}
+	switch (ep->com.state) {
+	case MPA_REQ_WAIT:
+	case MPA_REQ_SENT:
+	case MPA_REQ_RCVD:
+	case MPA_REP_SENT:
+	case FPDU_MODE:
+	case CONNECTING:
+		close = 1;
+		if (abrupt)
+			ep->com.state = ABORTING;
+		else {
+			ep->com.state = CLOSING;
+
+			/*
+			 * if we close before we see the fw4_ack() then we fix
+			 * up the timer state since we're reusing it.
+			 */
+			if (ep->mpa_skb &&
+			    test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
+				clear_bit(STOP_MPA_TIMER, &ep->com.flags);
+				stop_ep_timer(ep);
+			}
+			start_ep_timer(ep);
+		}
+		set_bit(CLOSE_SENT, &ep->com.flags);
+		break;
+	case CLOSING:
+		if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
+			close = 1;
+			if (abrupt) {
+				(void)stop_ep_timer(ep);
+				ep->com.state = ABORTING;
+			} else
+				ep->com.state = MORIBUND;
+		}
+		break;
+	case MORIBUND:
+	case ABORTING:
+	case DEAD:
+		pr_debug("ignoring disconnect ep %p state %u\n",
+			 ep, ep->com.state);
+		break;
+	default:
+		WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state);
+		break;
+	}
+
+	if (close) {
+		if (abrupt) {
+			set_bit(EP_DISC_ABORT, &ep->com.history);
+			ret = send_abort(ep);
+		} else {
+			set_bit(EP_DISC_CLOSE, &ep->com.history);
+			ret = send_halfclose(ep);
+		}
+		if (ret) {
+			set_bit(EP_DISC_FAIL, &ep->com.history);
+			if (!abrupt) {
+				stop_ep_timer(ep);
+				close_complete_upcall(ep, -EIO);
+			}
+			if (ep->com.qp) {
+				struct c4iw_qp_attributes attrs;
+
+				attrs.next_state = C4IW_QP_STATE_ERROR;
+				ret = c4iw_modify_qp(ep->com.qp->rhp,
+						     ep->com.qp,
+						     C4IW_QP_ATTR_NEXT_STATE,
+						     &attrs, 1);
+				if (ret)
+					pr_err("%s - qp <- error failed!\n",
+					       __func__);
+			}
+			fatal = 1;
+		}
+	}
+	mutex_unlock(&ep->com.mutex);
+	c4iw_put_ep(&ep->com);
+	if (fatal)
+		release_ep_resources(ep);
+	return ret;
+}
+
+static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
+			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
+{
+	struct c4iw_ep *ep;
+	int atid = be32_to_cpu(req->tid);
+
+	ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
+					   (__force u32) req->tid);
+	if (!ep)
+		return;
+
+	switch (req->retval) {
+	case FW_ENOMEM:
+		set_bit(ACT_RETRY_NOMEM, &ep->com.history);
+		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+			send_fw_act_open_req(ep, atid);
+			return;
+		}
+		fallthrough;
+	case FW_EADDRINUSE:
+		set_bit(ACT_RETRY_INUSE, &ep->com.history);
+		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+			send_fw_act_open_req(ep, atid);
+			return;
+		}
+		break;
+	default:
+		pr_info("%s unexpected ofld conn wr retval %d\n",
+		       __func__, req->retval);
+		break;
+	}
+	pr_err("active ofld_connect_wr failure %d atid %d\n",
+	       req->retval, atid);
+	mutex_lock(&dev->rdev.stats.lock);
+	dev->rdev.stats.act_ofld_conn_fails++;
+	mutex_unlock(&dev->rdev.stats.lock);
+	connect_reply_upcall(ep, status2errno(req->retval));
+	state_set(&ep->com, DEAD);
+	if (ep->com.remote_addr.ss_family == AF_INET6) {
+		struct sockaddr_in6 *sin6 =
+			(struct sockaddr_in6 *)&ep->com.local_addr;
+		cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+				   (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+	}
+	xa_erase_irq(&dev->atids, atid);
+	cxgb4_free_atid(dev->rdev.lldi.tids, atid);
+	dst_release(ep->dst);
+	cxgb4_l2t_release(ep->l2t);
+	c4iw_put_ep(&ep->com);
+}
+
+static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
+			struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
+{
+	struct sk_buff *rpl_skb;
+	struct cpl_pass_accept_req *cpl;
+	int ret;
+
+	rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
+	if (req->retval) {
+		pr_err("%s passive open failure %d\n", __func__, req->retval);
+		mutex_lock(&dev->rdev.stats.lock);
+		dev->rdev.stats.pas_ofld_conn_fails++;
+		mutex_unlock(&dev->rdev.stats.lock);
+		kfree_skb(rpl_skb);
+	} else {
+		cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
+		OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
+					(__force u32) htonl(
+					(__force u32) req->tid)));
+		ret = pass_accept_req(dev, rpl_skb);
+		if (!ret)
+			kfree_skb(rpl_skb);
+	}
+	return;
+}
+
+static inline u64 t4_tcb_get_field64(__be64 *tcb, u16 word)
+{
+	u64 tlo = be64_to_cpu(tcb[((31 - word) / 2)]);
+	u64 thi = be64_to_cpu(tcb[((31 - word) / 2) - 1]);
+	u64 t;
+	u32 shift = 32;
+
+	t = (thi << shift) | (tlo >> shift);
+
+	return t;
+}
+
+static inline u32 t4_tcb_get_field32(__be64 *tcb, u16 word, u32 mask, u32 shift)
+{
+	u32 v;
+	u64 t = be64_to_cpu(tcb[(31 - word) / 2]);
+
+	if (word & 0x1)
+		shift += 32;
+	v = (t >> shift) & mask;
+	return v;
+}
+
+static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_get_tcb_rpl *rpl = cplhdr(skb);
+	__be64 *tcb = (__be64 *)(rpl + 1);
+	unsigned int tid = GET_TID(rpl);
+	struct c4iw_ep *ep;
+	u64 t_flags_64;
+	u32 rx_pdu_out;
+
+	ep = get_ep_from_tid(dev, tid);
+	if (!ep)
+		return 0;
+	/* Examine the TF_RX_PDU_OUT (bit 49 of the t_flags) in order to
+	 * determine if there's a rx PDU feedback event pending.
+	 *
+	 * If that bit is set, it means we'll need to re-read the TCB's
+	 * rq_start value. The final value is the one present in a TCB
+	 * with the TF_RX_PDU_OUT bit cleared.
+	 */
+
+	t_flags_64 = t4_tcb_get_field64(tcb, TCB_T_FLAGS_W);
+	rx_pdu_out = (t_flags_64 & TF_RX_PDU_OUT_V(1)) >> TF_RX_PDU_OUT_S;
+
+	c4iw_put_ep(&ep->com); /* from get_ep_from_tid() */
+	c4iw_put_ep(&ep->com); /* from read_tcb() */
+
+	/* If TF_RX_PDU_OUT bit is set, re-read the TCB */
+	if (rx_pdu_out) {
+		if (++ep->rx_pdu_out_cnt >= 2) {
+			WARN_ONCE(1, "tcb re-read() reached the guard limit, finishing the cleanup\n");
+			goto cleanup;
+		}
+		read_tcb(ep);
+		return 0;
+	}
+
+	ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
+					  TCB_RQ_START_S);
+cleanup:
+	pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);
+
+	if (test_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags))
+		finish_peer_abort(dev, ep);
+	else if (test_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags))
+		send_abort_req(ep);
+	else
+		WARN_ONCE(1, "unexpected state!");
+
+	return 0;
+}
+
+static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_fw6_msg *rpl = cplhdr(skb);
+	struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
+
+	switch (rpl->type) {
+	case FW6_TYPE_CQE:
+		c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
+		break;
+	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
+		req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
+		switch (req->t_state) {
+		case TCP_SYN_SENT:
+			active_ofld_conn_reply(dev, skb, req);
+			break;
+		case TCP_SYN_RECV:
+			passive_ofld_conn_reply(dev, skb, req);
+			break;
+		default:
+			pr_err("%s unexpected ofld conn wr state %d\n",
+			       __func__, req->t_state);
+			break;
+		}
+		break;
+	}
+	return 0;
+}
+
+static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
+{
+	__be32 l2info;
+	__be16 hdr_len, vlantag, len;
+	u16 eth_hdr_len;
+	int tcp_hdr_len, ip_hdr_len;
+	u8 intf;
+	struct cpl_rx_pkt *cpl = cplhdr(skb);
+	struct cpl_pass_accept_req *req;
+	struct tcp_options_received tmp_opt;
+	struct c4iw_dev *dev;
+	enum chip_type type;
+
+	dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
+	/* Store values from cpl_rx_pkt in temporary location. */
+	vlantag = cpl->vlan;
+	len = cpl->len;
+	l2info  = cpl->l2info;
+	hdr_len = cpl->hdr_len;
+	intf = cpl->iff;
+
+	__skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
+
+	/*
+	 * We need to parse the TCP options from SYN packet.
+	 * to generate cpl_pass_accept_req.
+	 */
+	memset(&tmp_opt, 0, sizeof(tmp_opt));
+	tcp_clear_options(&tmp_opt);
+	tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
+
+	req = __skb_push(skb, sizeof(*req));
+	memset(req, 0, sizeof(*req));
+	req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
+			 SYN_MAC_IDX_V(RX_MACIDX_G(
+			 be32_to_cpu(l2info))) |
+			 SYN_XACT_MATCH_F);
+	type = dev->rdev.lldi.adapter_type;
+	tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
+	ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
+	req->hdr_len =
+		cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
+	if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
+		eth_hdr_len = is_t4(type) ?
+				RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
+				RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
+		req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
+					    IP_HDR_LEN_V(ip_hdr_len) |
+					    ETH_HDR_LEN_V(eth_hdr_len));
+	} else { /* T6 and later */
+		eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
+		req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
+					    T6_IP_HDR_LEN_V(ip_hdr_len) |
+					    T6_ETH_HDR_LEN_V(eth_hdr_len));
+	}
+	req->vlan = vlantag;
+	req->len = len;
+	req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
+				    PASS_OPEN_TOS_V(tos));
+	req->tcpopt.mss = htons(tmp_opt.mss_clamp);
+	if (tmp_opt.wscale_ok)
+		req->tcpopt.wsf = tmp_opt.snd_wscale;
+	req->tcpopt.tstamp = tmp_opt.saw_tstamp;
+	if (tmp_opt.sack_ok)
+		req->tcpopt.sack = 1;
+	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
+	return;
+}
+
+static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
+				  __be32 laddr, __be16 lport,
+				  __be32 raddr, __be16 rport,
+				  u32 rcv_isn, u32 filter, u16 window,
+				  u32 rss_qid, u8 port_id)
+{
+	struct sk_buff *req_skb;
+	struct fw_ofld_connection_wr *req;
+	struct cpl_pass_accept_req *cpl = cplhdr(skb);
+	int ret;
+
+	req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
+	if (!req_skb)
+		return;
+	req = __skb_put_zero(req_skb, sizeof(*req));
+	req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
+	req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
+	req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
+	req->le.filter = (__force __be32) filter;
+	req->le.lport = lport;
+	req->le.pport = rport;
+	req->le.u.ipv4.lip = laddr;
+	req->le.u.ipv4.pip = raddr;
+	req->tcb.rcv_nxt = htonl(rcv_isn + 1);
+	req->tcb.rcv_adv = htons(window);
+	req->tcb.t_state_to_astid =
+		 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
+			FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
+			FW_OFLD_CONNECTION_WR_ASTID_V(
+			PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
+
+	/*
+	 * We store the qid in opt2 which will be used by the firmware
+	 * to send us the wr response.
+	 */
+	req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
+
+	/*
+	 * We initialize the MSS index in TCB to 0xF.
+	 * So that when driver sends cpl_pass_accept_rpl
+	 * TCB picks up the correct value. If this was 0
+	 * TP will ignore any value > 0 for MSS index.
+	 */
+	req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
+	req->cookie = (uintptr_t)skb;
+
+	set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
+	ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
+	if (ret < 0) {
+		pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
+		       ret);
+		kfree_skb(skb);
+		kfree_skb(req_skb);
+	}
+}
+
+/*
+ * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
+ * messages when a filter is being used instead of server to
+ * redirect a syn packet. When packets hit filter they are redirected
+ * to the offload queue and driver tries to establish the connection
+ * using firmware work request.
+ */
+static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	int stid;
+	unsigned int filter;
+	struct ethhdr *eh = NULL;
+	struct vlan_ethhdr *vlan_eh = NULL;
+	struct iphdr *iph;
+	struct tcphdr *tcph;
+	struct rss_header *rss = (void *)skb->data;
+	struct cpl_rx_pkt *cpl = (void *)skb->data;
+	struct cpl_pass_accept_req *req = (void *)(rss + 1);
+	struct l2t_entry *e;
+	struct dst_entry *dst;
+	struct c4iw_ep *lep = NULL;
+	u16 window;
+	struct port_info *pi;
+	struct net_device *pdev;
+	u16 rss_qid, eth_hdr_len;
+	int step;
+	struct neighbour *neigh;
+
+	/* Drop all non-SYN packets */
+	if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
+		goto reject;
+
+	/*
+	 * Drop all packets which did not hit the filter.
+	 * Unlikely to happen.
+	 */
+	if (!(rss->filter_hit && rss->filter_tid))
+		goto reject;
+
+	/*
+	 * Calculate the server tid from filter hit index from cpl_rx_pkt.
+	 */
+	stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
+
+	lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
+	if (!lep) {
+		pr_warn("%s connect request on invalid stid %d\n",
+			__func__, stid);
+		goto reject;
+	}
+
+	switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
+	case CHELSIO_T4:
+		eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
+		break;
+	case CHELSIO_T5:
+		eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
+		break;
+	case CHELSIO_T6:
+		eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
+		break;
+	default:
+		pr_err("T%d Chip is not supported\n",
+		       CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
+		goto reject;
+	}
+
+	if (eth_hdr_len == ETH_HLEN) {
+		eh = (struct ethhdr *)(req + 1);
+		iph = (struct iphdr *)(eh + 1);
+	} else {
+		vlan_eh = (struct vlan_ethhdr *)(req + 1);
+		iph = (struct iphdr *)(vlan_eh + 1);
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(cpl->vlan));
+	}
+
+	if (iph->version != 0x4)
+		goto reject;
+
+	tcph = (struct tcphdr *)(iph + 1);
+	skb_set_network_header(skb, (void *)iph - (void *)rss);
+	skb_set_transport_header(skb, (void *)tcph - (void *)rss);
+	skb_get(skb);
+
+	pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n",
+		 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
+		 ntohs(tcph->source), iph->tos);
+
+	dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev,
+			      iph->daddr, iph->saddr, tcph->dest,
+			      tcph->source, iph->tos);
+	if (!dst) {
+		pr_err("%s - failed to find dst entry!\n", __func__);
+		goto reject;
+	}
+	neigh = dst_neigh_lookup_skb(dst, skb);
+
+	if (!neigh) {
+		pr_err("%s - failed to allocate neigh!\n", __func__);
+		goto free_dst;
+	}
+
+	if (neigh->dev->flags & IFF_LOOPBACK) {
+		pdev = ip_dev_find(&init_net, iph->daddr);
+		if (!pdev) {
+			pr_err("%s - failed to find device!\n", __func__);
+			goto free_dst;
+		}
+		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
+				    pdev, 0);
+		pi = (struct port_info *)netdev_priv(pdev);
+		dev_put(pdev);
+	} else {
+		pdev = get_real_dev(neigh->dev);
+		e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
+					pdev, 0);
+		pi = (struct port_info *)netdev_priv(pdev);
+	}
+	neigh_release(neigh);
+	if (!e) {
+		pr_err("%s - failed to allocate l2t entry!\n",
+		       __func__);
+		goto free_dst;
+	}
+
+	step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
+	rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
+	window = (__force u16) htons((__force u16)tcph->window);
+
+	/* Calcuate filter portion for LE region. */
+	filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
+						    dev->rdev.lldi.ports[0],
+						    e));
+
+	/*
+	 * Synthesize the cpl_pass_accept_req. We have everything except the
+	 * TID. Once firmware sends a reply with TID we update the TID field
+	 * in cpl and pass it through the regular cpl_pass_accept_req path.
+	 */
+	build_cpl_pass_accept_req(skb, stid, iph->tos);
+	send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
+			      tcph->source, ntohl(tcph->seq), filter, window,
+			      rss_qid, pi->port_id);
+	cxgb4_l2t_release(e);
+free_dst:
+	dst_release(dst);
+reject:
+	if (lep)
+		c4iw_put_ep(&lep->com);
+	return 0;
+}
+
+/*
+ * These are the real handlers that are called from a
+ * work queue.
+ */
+static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
+	[CPL_ACT_ESTABLISH] = act_establish,
+	[CPL_ACT_OPEN_RPL] = act_open_rpl,
+	[CPL_RX_DATA] = rx_data,
+	[CPL_ABORT_RPL_RSS] = abort_rpl,
+	[CPL_ABORT_RPL] = abort_rpl,
+	[CPL_PASS_OPEN_RPL] = pass_open_rpl,
+	[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
+	[CPL_PASS_ACCEPT_REQ] = pass_accept_req,
+	[CPL_PASS_ESTABLISH] = pass_establish,
+	[CPL_PEER_CLOSE] = peer_close,
+	[CPL_ABORT_REQ_RSS] = peer_abort,
+	[CPL_CLOSE_CON_RPL] = close_con_rpl,
+	[CPL_RDMA_TERMINATE] = terminate,
+	[CPL_FW4_ACK] = fw4_ack,
+	[CPL_GET_TCB_RPL] = read_tcb_rpl,
+	[CPL_FW6_MSG] = deferred_fw6_msg,
+	[CPL_RX_PKT] = rx_pkt,
+	[FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
+	[FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
+};
+
+static void process_timeout(struct c4iw_ep *ep)
+{
+	struct c4iw_qp_attributes attrs;
+	int abort = 1;
+
+	mutex_lock(&ep->com.mutex);
+	pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state);
+	set_bit(TIMEDOUT, &ep->com.history);
+	switch (ep->com.state) {
+	case MPA_REQ_SENT:
+		connect_reply_upcall(ep, -ETIMEDOUT);
+		break;
+	case MPA_REQ_WAIT:
+	case MPA_REQ_RCVD:
+	case MPA_REP_SENT:
+	case FPDU_MODE:
+		break;
+	case CLOSING:
+	case MORIBUND:
+		if (ep->com.cm_id && ep->com.qp) {
+			attrs.next_state = C4IW_QP_STATE_ERROR;
+			c4iw_modify_qp(ep->com.qp->rhp,
+				     ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+				     &attrs, 1);
+		}
+		close_complete_upcall(ep, -ETIMEDOUT);
+		break;
+	case ABORTING:
+	case DEAD:
+
+		/*
+		 * These states are expected if the ep timed out at the same
+		 * time as another thread was calling stop_ep_timer().
+		 * So we silently do nothing for these states.
+		 */
+		abort = 0;
+		break;
+	default:
+		WARN(1, "%s unexpected state ep %p tid %u state %u\n",
+			__func__, ep, ep->hwtid, ep->com.state);
+		abort = 0;
+	}
+	mutex_unlock(&ep->com.mutex);
+	if (abort)
+		c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
+	c4iw_put_ep(&ep->com);
+}
+
+static void process_timedout_eps(void)
+{
+	struct c4iw_ep *ep;
+
+	spin_lock_irq(&timeout_lock);
+	while (!list_empty(&timeout_list)) {
+		struct list_head *tmp;
+
+		tmp = timeout_list.next;
+		list_del(tmp);
+		tmp->next = NULL;
+		tmp->prev = NULL;
+		spin_unlock_irq(&timeout_lock);
+		ep = list_entry(tmp, struct c4iw_ep, entry);
+		process_timeout(ep);
+		spin_lock_irq(&timeout_lock);
+	}
+	spin_unlock_irq(&timeout_lock);
+}
+
+static void process_work(struct work_struct *work)
+{
+	struct sk_buff *skb = NULL;
+	struct c4iw_dev *dev;
+	struct cpl_act_establish *rpl;
+	unsigned int opcode;
+	int ret;
+
+	process_timedout_eps();
+	while ((skb = skb_dequeue(&rxq))) {
+		rpl = cplhdr(skb);
+		dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
+		opcode = rpl->ot.opcode;
+
+		if (opcode >= ARRAY_SIZE(work_handlers) ||
+		    !work_handlers[opcode]) {
+			pr_err("No handler for opcode 0x%x.\n", opcode);
+			kfree_skb(skb);
+		} else {
+			ret = work_handlers[opcode](dev, skb);
+			if (!ret)
+				kfree_skb(skb);
+		}
+		process_timedout_eps();
+	}
+}
+
+static DECLARE_WORK(skb_work, process_work);
+
+static void ep_timeout(struct timer_list *t)
+{
+	struct c4iw_ep *ep = from_timer(ep, t, timer);
+	int kickit = 0;
+
+	spin_lock(&timeout_lock);
+	if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
+		/*
+		 * Only insert if it is not already on the list.
+		 */
+		if (!ep->entry.next) {
+			list_add_tail(&ep->entry, &timeout_list);
+			kickit = 1;
+		}
+	}
+	spin_unlock(&timeout_lock);
+	if (kickit)
+		queue_work(workq, &skb_work);
+}
+
+/*
+ * All the CM events are handled on a work queue to have a safe context.
+ */
+static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+
+	/*
+	 * Save dev in the skb->cb area.
+	 */
+	*((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
+
+	/*
+	 * Queue the skb and schedule the worker thread.
+	 */
+	skb_queue_tail(&rxq, skb);
+	queue_work(workq, &skb_work);
+	return 0;
+}
+
+static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
+
+	if (rpl->status != CPL_ERR_NONE) {
+		pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
+		       rpl->status, GET_TID(rpl));
+	}
+	kfree_skb(skb);
+	return 0;
+}
+
+static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_fw6_msg *rpl = cplhdr(skb);
+	struct c4iw_wr_wait *wr_waitp;
+	int ret;
+
+	pr_debug("type %u\n", rpl->type);
+
+	switch (rpl->type) {
+	case FW6_TYPE_WR_RPL:
+		ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
+		wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
+		pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret);
+		if (wr_waitp)
+			c4iw_wake_up_deref(wr_waitp, ret ? -ret : 0);
+		kfree_skb(skb);
+		break;
+	case FW6_TYPE_CQE:
+	case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
+		sched(dev, skb);
+		break;
+	default:
+		pr_err("%s unexpected fw6 msg type %u\n",
+		       __func__, rpl->type);
+		kfree_skb(skb);
+		break;
+	}
+	return 0;
+}
+
+static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+	struct cpl_abort_req_rss *req = cplhdr(skb);
+	struct c4iw_ep *ep;
+	unsigned int tid = GET_TID(req);
+
+	ep = get_ep_from_tid(dev, tid);
+	/* This EP will be dereferenced in peer_abort() */
+	if (!ep) {
+		pr_warn("Abort on non-existent endpoint, tid %d\n", tid);
+		kfree_skb(skb);
+		return 0;
+	}
+	if (cxgb_is_neg_adv(req->status)) {
+		pr_debug("Negative advice on abort- tid %u status %d (%s)\n",
+			 ep->hwtid, req->status,
+			 neg_adv_str(req->status));
+		goto out;
+	}
+	pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state);
+
+	c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET);
+out:
+	sched(dev, skb);
+	return 0;
+}
+
+/*
+ * Most upcalls from the T4 Core go to sched() to
+ * schedule the processing on a work queue.
+ */
+c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
+	[CPL_ACT_ESTABLISH] = sched,
+	[CPL_ACT_OPEN_RPL] = sched,
+	[CPL_RX_DATA] = sched,
+	[CPL_ABORT_RPL_RSS] = sched,
+	[CPL_ABORT_RPL] = sched,
+	[CPL_PASS_OPEN_RPL] = sched,
+	[CPL_CLOSE_LISTSRV_RPL] = sched,
+	[CPL_PASS_ACCEPT_REQ] = sched,
+	[CPL_PASS_ESTABLISH] = sched,
+	[CPL_PEER_CLOSE] = sched,
+	[CPL_CLOSE_CON_RPL] = sched,
+	[CPL_ABORT_REQ_RSS] = peer_abort_intr,
+	[CPL_RDMA_TERMINATE] = sched,
+	[CPL_FW4_ACK] = sched,
+	[CPL_SET_TCB_RPL] = set_tcb_rpl,
+	[CPL_GET_TCB_RPL] = sched,
+	[CPL_FW6_MSG] = fw6_msg,
+	[CPL_RX_PKT] = sched
+};
+
+int __init c4iw_cm_init(void)
+{
+	skb_queue_head_init(&rxq);
+
+	workq = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM);
+	if (!workq)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void c4iw_cm_term(void)
+{
+	WARN_ON(!list_empty(&timeout_list));
+	destroy_workqueue(workq);
+}