text: /*
   * Copyright (c) 2006 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 <net/neighbour.h>
  #include <net/netevent.h>
  #include <net/route.h>
  
  #include "tcb.h"
  #include "cxgb3_offload.h"
  #include "iwch.h"
  #include "iwch_provider.h"
  #include "iwch_cm.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,
  };
  
  int peer2peer = 0;
  module_param(peer2peer, int, 0644);
  MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
  
  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 = 1;
  module_param(mpa_rev, int, 0644);
  MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
  		 "1 is spec compliant. (default=1)");
  
  static int markers_enabled = 0;
  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=256)");
  
  static int snd_win = 32 * 1024;
  module_param(snd_win, int, 0644);
  MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
  
  static unsigned int nocong = 0;
  module_param(nocong, uint, 0644);
  MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
  
  static unsigned int cong_flavor = 1;
  module_param(cong_flavor, uint, 0644);
  MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
  
  static void process_work(struct work_struct *work);
  static struct workqueue_struct *workq;
  static DECLARE_WORK(skb_work, process_work);
  
  static struct sk_buff_head rxq;
  static cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS];
  
  static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
  static void ep_timeout(unsigned long arg);
  static void connect_reply_upcall(struct iwch_ep *ep, int status);
  
  static void start_ep_timer(struct iwch_ep *ep)
  {
  	PDBG("%s ep %p\n", __func__, ep);
  	if (timer_pending(&ep->timer)) {
  		PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
  		del_timer_sync(&ep->timer);
  	} else
  		get_ep(&ep->com);
  	ep->timer.expires = jiffies + ep_timeout_secs * HZ;
  	ep->timer.data = (unsigned long)ep;
  	ep->timer.function = ep_timeout;
  	add_timer(&ep->timer);
  }
  
  static void stop_ep_timer(struct iwch_ep *ep)
  {
  	PDBG("%s ep %p\n", __func__, ep);
  	if (!timer_pending(&ep->timer)) {
  		printk(KERN_ERR "%s timer stopped when its not running!  ep %p state %u\n",
  			__func__, ep, ep->com.state);
  		WARN_ON(1);
  		return;
  	}
  	del_timer_sync(&ep->timer);
  	put_ep(&ep->com);
  }
  
  int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
  {
  	int	error = 0;
  	struct cxio_rdev *rdev;
  
  	rdev = (struct cxio_rdev *)tdev->ulp;
  	if (cxio_fatal_error(rdev)) {
  		kfree_skb(skb);
  		return -EIO;
  	}
  	error = l2t_send(tdev, skb, l2e);
  	if (error)
  		kfree_skb(skb);
  	return error;
  }
  
  int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
  {
  	int	error = 0;
  	struct cxio_rdev *rdev;
  
  	rdev = (struct cxio_rdev *)tdev->ulp;
  	if (cxio_fatal_error(rdev)) {
  		kfree_skb(skb);
  		return -EIO;
  	}
  	error = cxgb3_ofld_send(tdev, skb);
  	if (error)
  		kfree_skb(skb);
  	return error;
  }
  
  static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
  {
  	struct cpl_tid_release *req;
  
  	skb = get_skb(skb, sizeof *req, GFP_KERNEL);
  	if (!skb)
  		return;
  	req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
  	skb->priority = CPL_PRIORITY_SETUP;
  	iwch_cxgb3_ofld_send(tdev, skb);
  	return;
  }
  
  int iwch_quiesce_tid(struct iwch_ep *ep)
  {
  	struct cpl_set_tcb_field *req;
  	struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  
  	if (!skb)
  		return -ENOMEM;
  	req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
  	req->reply = 0;
  	req->cpu_idx = 0;
  	req->word = htons(W_TCB_RX_QUIESCE);
  	req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
  	req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
  
  	skb->priority = CPL_PRIORITY_DATA;
  	return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
  }
  
  int iwch_resume_tid(struct iwch_ep *ep)
  {
  	struct cpl_set_tcb_field *req;
  	struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  
  	if (!skb)
  		return -ENOMEM;
  	req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
  	req->reply = 0;
  	req->cpu_idx = 0;
  	req->word = htons(W_TCB_RX_QUIESCE);
  	req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
  	req->val = 0;
  
  	skb->priority = CPL_PRIORITY_DATA;
  	return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
  }
  
  static void set_emss(struct iwch_ep *ep, u16 opt)
  {
  	PDBG("%s ep %p opt %u\n", __func__, ep, opt);
  	ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
  	if (G_TCPOPT_TSTAMP(opt))
  		ep->emss -= 12;
  	if (ep->emss < 128)
  		ep->emss = 128;
  	PDBG("emss=%d\n", ep->emss);
  }
  
  static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
  {
  	unsigned long flags;
  	enum iwch_ep_state state;
  
  	spin_lock_irqsave(&epc->lock, flags);
  	state = epc->state;
  	spin_unlock_irqrestore(&epc->lock, flags);
  	return state;
  }
  
  static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
  {
  	epc->state = new;
  }
  
  static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
  {
  	unsigned long flags;
  
  	spin_lock_irqsave(&epc->lock, flags);
  	PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
  	__state_set(epc, new);
  	spin_unlock_irqrestore(&epc->lock, flags);
  	return;
  }
  
  static void *alloc_ep(int size, gfp_t gfp)
  {
  	struct iwch_ep_common *epc;
  
  	epc = kzalloc(size, gfp);
  	if (epc) {
  		kref_init(&epc->kref);
  		spin_lock_init(&epc->lock);
  		init_waitqueue_head(&epc->waitq);
  	}
  	PDBG("%s alloc ep %p\n", __func__, epc);
  	return epc;
  }
  
  void __free_ep(struct kref *kref)
  {
  	struct iwch_ep *ep;
  	ep = container_of(container_of(kref, struct iwch_ep_common, kref),
  			  struct iwch_ep, com);
  	PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
  	if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
  		cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
  		dst_release(ep->dst);
  		l2t_release(L2DATA(ep->com.tdev), ep->l2t);
  	}
  	kfree(ep);
  }
  
  static void release_ep_resources(struct iwch_ep *ep)
  {
  	PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
  	set_bit(RELEASE_RESOURCES, &ep->com.flags);
  	put_ep(&ep->com);
  }
  
  static void process_work(struct work_struct *work)
  {
  	struct sk_buff *skb = NULL;
  	void *ep;
  	struct t3cdev *tdev;
  	int ret;
  
  	while ((skb = skb_dequeue(&rxq))) {
  		ep = *((void **) (skb->cb));
  		tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
  		ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
  		if (ret & CPL_RET_BUF_DONE)
  			kfree_skb(skb);
  
  		/*
  		 * ep was referenced in sched(), and is freed here.
  		 */
  		put_ep((struct iwch_ep_common *)ep);
  	}
  }
  
  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);
  	} else {
  		skb = alloc_skb(len, gfp);
  	}
  	return skb;
  }
  
  static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
  				 __be32 peer_ip, __be16 local_port,
  				 __be16 peer_port, u8 tos)
  {
  	struct rtable *rt;
  	struct flowi fl = {
  		.oif = 0,
  		.nl_u = {
  			 .ip4_u = {
  				   .daddr = peer_ip,
  				   .saddr = local_ip,
  				   .tos = tos}
  			 },
  		.proto = IPPROTO_TCP,
  		.uli_u = {
  			  .ports = {
  				    .sport = local_port,
  				    .dport = peer_port}
  			  }
  	};
  
  	if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
  		return NULL;
  	return rt;
  }
  
  static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
  {
  	int i = 0;
  
  	while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
  		++i;
  	return i;
  }
  
  static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
  {
  	PDBG("%s t3cdev %p\n", __func__, dev);
  	kfree_skb(skb);
  }
  
  /*
   * Handle an ARP failure for an active open.
   */
  static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
  {
  	printk(KERN_ERR MOD "ARP failure duing connect\n");
  	kfree_skb(skb);
  }
  
  /*
   * 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(struct t3cdev *dev, struct sk_buff *skb)
  {
  	struct cpl_abort_req *req = cplhdr(skb);
  
  	PDBG("%s t3cdev %p\n", __func__, dev);
  	req->cmd = CPL_ABORT_NO_RST;
  	iwch_cxgb3_ofld_send(dev, skb);
  }
  
  static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
  {
  	struct cpl_close_con_req *req;
  	struct sk_buff *skb;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	skb = get_skb(NULL, sizeof(*req), gfp);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
  		return -ENOMEM;
  	}
  	skb->priority = CPL_PRIORITY_DATA;
  	set_arp_failure_handler(skb, arp_failure_discard);
  	req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
  	req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
  	return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  }
  
  static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
  {
  	struct cpl_abort_req *req;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	skb = get_skb(skb, sizeof(*req), gfp);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
  		       __func__);
  		return -ENOMEM;
  	}
  	skb->priority = CPL_PRIORITY_DATA;
  	set_arp_failure_handler(skb, abort_arp_failure);
  	req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
  	req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
  	req->cmd = CPL_ABORT_SEND_RST;
  	return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  }
  
  static int send_connect(struct iwch_ep *ep)
  {
  	struct cpl_act_open_req *req;
  	struct sk_buff *skb;
  	u32 opt0h, opt0l, opt2;
  	unsigned int mtu_idx;
  	int wscale;
  
  	PDBG("%s ep %p\n", __func__, ep);
  
  	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
  		       __func__);
  		return -ENOMEM;
  	}
  	mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
  	wscale = compute_wscale(rcv_win);
  	opt0h = V_NAGLE(0) |
  	    V_NO_CONG(nocong) |
  	    V_KEEP_ALIVE(1) |
  	    F_TCAM_BYPASS |
  	    V_WND_SCALE(wscale) |
  	    V_MSS_IDX(mtu_idx) |
  	    V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
  	opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
  	opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor);
  	skb->priority = CPL_PRIORITY_SETUP;
  	set_arp_failure_handler(skb, act_open_req_arp_failure);
  
  	req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid));
  	req->local_port = ep->com.local_addr.sin_port;
  	req->peer_port = ep->com.remote_addr.sin_port;
  	req->local_ip = ep->com.local_addr.sin_addr.s_addr;
  	req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
  	req->opt0h = htonl(opt0h);
  	req->opt0l = htonl(opt0l);
  	req->params = 0;
  	req->opt2 = htonl(opt2);
  	return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  }
  
  static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
  {
  	int mpalen;
  	struct tx_data_wr *req;
  	struct mpa_message *mpa;
  	int len;
  
  	PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
  
  	BUG_ON(skb_cloned(skb));
  
  	mpalen = sizeof(*mpa) + ep->plen;
  	if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
  		kfree_skb(skb);
  		skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
  		if (!skb) {
  			connect_reply_upcall(ep, -ENOMEM);
  			return;
  		}
  	}
  	skb_trim(skb, 0);
  	skb_reserve(skb, sizeof(*req));
  	skb_put(skb, mpalen);
  	skb->priority = CPL_PRIORITY_DATA;
  	mpa = (struct mpa_message *) skb->data;
  	memset(mpa, 0, sizeof(*mpa));
  	memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
  	mpa->flags = (crc_enabled ? MPA_CRC : 0) |
  		     (markers_enabled ? MPA_MARKERS : 0);
  	mpa->private_data_size = htons(ep->plen);
  	mpa->revision = mpa_rev;
  
  	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 tx_ack() will deref it.
  	 */
  	skb_get(skb);
  	set_arp_failure_handler(skb, arp_failure_discard);
  	skb_reset_transport_header(skb);
  	len = skb->len;
  	req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
  	req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
  	req->wr_lo = htonl(V_WR_TID(ep->hwtid));
  	req->len = htonl(len);
  	req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
  			   V_TX_SNDBUF(snd_win>>15));
  	req->flags = htonl(F_TX_INIT);
  	req->sndseq = htonl(ep->snd_seq);
  	BUG_ON(ep->mpa_skb);
  	ep->mpa_skb = skb;
  	iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  	start_ep_timer(ep);
  	state_set(&ep->com, MPA_REQ_SENT);
  	return;
  }
  
  static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
  {
  	int mpalen;
  	struct tx_data_wr *req;
  	struct mpa_message *mpa;
  	struct sk_buff *skb;
  
  	PDBG("%s ep %p plen %d\n", __func__, ep, plen);
  
  	mpalen = sizeof(*mpa) + plen;
  
  	skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
  		return -ENOMEM;
  	}
  	skb_reserve(skb, sizeof(*req));
  	mpa = (struct mpa_message *) skb_put(skb, mpalen);
  	memset(mpa, 0, sizeof(*mpa));
  	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
  	mpa->flags = MPA_REJECT;
  	mpa->revision = mpa_rev;
  	mpa->private_data_size = htons(plen);
  	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 tx_ack() will deref it.
  	 */
  	skb_get(skb);
  	skb->priority = CPL_PRIORITY_DATA;
  	set_arp_failure_handler(skb, arp_failure_discard);
  	skb_reset_transport_header(skb);
  	req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
  	req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
  	req->wr_lo = htonl(V_WR_TID(ep->hwtid));
  	req->len = htonl(mpalen);
  	req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
  			   V_TX_SNDBUF(snd_win>>15));
  	req->flags = htonl(F_TX_INIT);
  	req->sndseq = htonl(ep->snd_seq);
  	BUG_ON(ep->mpa_skb);
  	ep->mpa_skb = skb;
  	return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  }
  
  static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
  {
  	int mpalen;
  	struct tx_data_wr *req;
  	struct mpa_message *mpa;
  	int len;
  	struct sk_buff *skb;
  
  	PDBG("%s ep %p plen %d\n", __func__, ep, plen);
  
  	mpalen = sizeof(*mpa) + plen;
  
  	skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
  		return -ENOMEM;
  	}
  	skb->priority = CPL_PRIORITY_DATA;
  	skb_reserve(skb, sizeof(*req));
  	mpa = (struct mpa_message *) skb_put(skb, mpalen);
  	memset(mpa, 0, sizeof(*mpa));
  	memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
  	mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
  		     (markers_enabled ? MPA_MARKERS : 0);
  	mpa->revision = mpa_rev;
  	mpa->private_data_size = htons(plen);
  	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 tx_ack() will deref it.
  	 */
  	skb_get(skb);
  	set_arp_failure_handler(skb, arp_failure_discard);
  	skb_reset_transport_header(skb);
  	len = skb->len;
  	req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
  	req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
  	req->wr_lo = htonl(V_WR_TID(ep->hwtid));
  	req->len = htonl(len);
  	req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
  			   V_TX_SNDBUF(snd_win>>15));
  	req->flags = htonl(F_TX_INIT);
  	req->sndseq = htonl(ep->snd_seq);
  	ep->mpa_skb = skb;
  	state_set(&ep->com, MPA_REP_SENT);
  	return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  }
  
  static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct cpl_act_establish *req = cplhdr(skb);
  	unsigned int tid = GET_TID(req);
  
  	PDBG("%s ep %p tid %d\n", __func__, ep, tid);
  
  	dst_confirm(ep->dst);
  
  	/* setup the hwtid for this connection */
  	ep->hwtid = tid;
  	cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
  
  	ep->snd_seq = ntohl(req->snd_isn);
  	ep->rcv_seq = ntohl(req->rcv_isn);
  
  	set_emss(ep, ntohs(req->tcp_opt));
  
  	/* dealloc the atid */
  	cxgb3_free_atid(ep->com.tdev, ep->atid);
  
  	/* start MPA negotiation */
  	send_mpa_req(ep, skb);
  
  	return 0;
  }
  
  static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
  {
  	PDBG("%s ep %p\n", __FILE__, ep);
  	state_set(&ep->com, ABORTING);
  	send_abort(ep, skb, gfp);
  }
  
  static void close_complete_upcall(struct iwch_ep *ep)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_CLOSE;
  	if (ep->com.cm_id) {
  		PDBG("close complete delivered ep %p cm_id %p tid %d\n",
  		     ep, ep->com.cm_id, ep->hwtid);
  		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  		ep->com.cm_id->rem_ref(ep->com.cm_id);
  		ep->com.cm_id = NULL;
  		ep->com.qp = NULL;
  	}
  }
  
  static void peer_close_upcall(struct iwch_ep *ep)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_DISCONNECT;
  	if (ep->com.cm_id) {
  		PDBG("peer close delivered ep %p cm_id %p tid %d\n",
  		     ep, ep->com.cm_id, ep->hwtid);
  		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  	}
  }
  
  static void peer_abort_upcall(struct iwch_ep *ep)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_CLOSE;
  	event.status = -ECONNRESET;
  	if (ep->com.cm_id) {
  		PDBG("abort delivered ep %p cm_id %p tid %d\n", ep,
  		     ep->com.cm_id, ep->hwtid);
  		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  		ep->com.cm_id->rem_ref(ep->com.cm_id);
  		ep->com.cm_id = NULL;
  		ep->com.qp = NULL;
  	}
  }
  
  static void connect_reply_upcall(struct iwch_ep *ep, int status)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p status %d\n", __func__, ep, status);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_CONNECT_REPLY;
  	event.status = status;
  	event.local_addr = ep->com.local_addr;
  	event.remote_addr = ep->com.remote_addr;
  
  	if ((status == 0) || (status == -ECONNREFUSED)) {
  		event.private_data_len = ep->plen;
  		event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
  	}
  	if (ep->com.cm_id) {
  		PDBG("%s ep %p tid %d status %d\n", __func__, ep,
  		     ep->hwtid, status);
  		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  	}
  	if (status < 0) {
  		ep->com.cm_id->rem_ref(ep->com.cm_id);
  		ep->com.cm_id = NULL;
  		ep->com.qp = NULL;
  	}
  }
  
  static void connect_request_upcall(struct iwch_ep *ep)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_CONNECT_REQUEST;
  	event.local_addr = ep->com.local_addr;
  	event.remote_addr = ep->com.remote_addr;
  	event.private_data_len = ep->plen;
  	event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
  	event.provider_data = ep;
  	if (state_read(&ep->parent_ep->com) != DEAD) {
  		get_ep(&ep->com);
  		ep->parent_ep->com.cm_id->event_handler(
  						ep->parent_ep->com.cm_id,
  						&event);
  	}
  	put_ep(&ep->parent_ep->com);
  	ep->parent_ep = NULL;
  }
  
  static void established_upcall(struct iwch_ep *ep)
  {
  	struct iw_cm_event event;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	memset(&event, 0, sizeof(event));
  	event.event = IW_CM_EVENT_ESTABLISHED;
  	if (ep->com.cm_id) {
  		PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
  		ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  	}
  }
  
  static int update_rx_credits(struct iwch_ep *ep, u32 credits)
  {
  	struct cpl_rx_data_ack *req;
  	struct sk_buff *skb;
  
  	PDBG("%s ep %p credits %u\n", __func__, ep, credits);
  	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
  		return 0;
  	}
  
  	req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
  	req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
  	skb->priority = CPL_PRIORITY_ACK;
  	iwch_cxgb3_ofld_send(ep->com.tdev, skb);
  	return credits;
  }
  
  static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
  {
  	struct mpa_message *mpa;
  	u16 plen;
  	struct iwch_qp_attributes attrs;
  	enum iwch_qp_attr_mask mask;
  	int err;
  
  	PDBG("%s ep %p\n", __func__, ep);
  
  	/*
  	 * Stop mpa timer.  If it expired, then the state has
  	 * changed and we bail since ep_timeout already aborted
  	 * the connection.
  	 */
  	stop_ep_timer(ep);
  	if (state_read(&ep->com) != MPA_REQ_SENT)
  		return;
  
  	/*
  	 * 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;
  	}
  
  	/*
  	 * 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;
  	mpa = (struct mpa_message *) ep->mpa_pkt;
  
  	/* Validate MPA header. */
  	if (mpa->revision != mpa_rev) {
  		err = -EPROTO;
  		goto err;
  	}
  	if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
  		err = -EPROTO;
  		goto err;
  	}
  
  	plen = ntohs(mpa->private_data_size);
  
  	/*
  	 * Fail if there's too much private data.
  	 */
  	if (plen > MPA_MAX_PRIVATE_DATA) {
  		err = -EPROTO;
  		goto err;
  	}
  
  	/*
  	 * If plen does not account for pkt size
  	 */
  	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
  		err = -EPROTO;
  		goto err;
  	}
  
  	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;
  
  	if (mpa->flags & MPA_REJECT) {
  		err = -ECONNREFUSED;
  		goto err;
  	}
  
  	/*
  	 * 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.initiator = 1;
  	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_rev;
  	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
  	     "xmit_marker_enabled=%d, version=%d\n", __func__,
  	     ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
  	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
  
  	attrs.mpa_attr = ep->mpa_attr;
  	attrs.max_ird = ep->ird;
  	attrs.max_ord = ep->ord;
  	attrs.llp_stream_handle = ep;
  	attrs.next_state = IWCH_QP_STATE_RTS;
  
  	mask = IWCH_QP_ATTR_NEXT_STATE |
  	    IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
  	    IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
  
  	/* bind QP and TID with INIT_WR */
  	err = iwch_modify_qp(ep->com.qp->rhp,
  			     ep->com.qp, mask, &attrs, 1);
  	if (err)
  		goto err;
  
  	if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
  		iwch_post_zb_read(ep->com.qp);
  	}
  
  	goto out;
  err:
  	abort_connection(ep, skb, GFP_KERNEL);
  out:
  	connect_reply_upcall(ep, err);
  	return;
  }
  
  static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
  {
  	struct mpa_message *mpa;
  	u16 plen;
  
  	PDBG("%s ep %p\n", __func__, ep);
  
  	/*
  	 * Stop mpa timer.  If it expired, then the state has
  	 * changed and we bail since ep_timeout already aborted
  	 * the connection.
  	 */
  	stop_ep_timer(ep);
  	if (state_read(&ep->com) != MPA_REQ_WAIT)
  		return;
  
  	/*
  	 * 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)) {
  		abort_connection(ep, skb, GFP_KERNEL);
  		return;
  	}
  
  	PDBG("%s enter (%s line %u)\n", __func__, __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;
  	PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
  	mpa = (struct mpa_message *) ep->mpa_pkt;
  
  	/*
  	 * Validate MPA Header.
  	 */
  	if (mpa->revision != mpa_rev) {
  		abort_connection(ep, skb, GFP_KERNEL);
  		return;
  	}
  
  	if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
  		abort_connection(ep, skb, GFP_KERNEL);
  		return;
  	}
  
  	plen = ntohs(mpa->private_data_size);
  
  	/*
  	 * Fail if there's too much private data.
  	 */
  	if (plen > MPA_MAX_PRIVATE_DATA) {
  		abort_connection(ep, skb, GFP_KERNEL);
  		return;
  	}
  
  	/*
  	 * If plen does not account for pkt size
  	 */
  	if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
  		abort_connection(ep, skb, GFP_KERNEL);
  		return;
  	}
  	ep->plen = (u8) plen;
  
  	/*
  	 * If we don't have all the pdata yet, then bail.
  	 */
  	if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
  		return;
  
  	/*
  	 * 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_rev;
  	PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
  	     "xmit_marker_enabled=%d, version=%d\n", __func__,
  	     ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
  	     ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
  
  	state_set(&ep->com, MPA_REQ_RCVD);
  
  	/* drive upcall */
  	connect_request_upcall(ep);
  	return;
  }
  
  static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct cpl_rx_data *hdr = cplhdr(skb);
  	unsigned int dlen = ntohs(hdr->len);
  
  	PDBG("%s ep %p dlen %u\n", __func__, ep, dlen);
  
  	skb_pull(skb, sizeof(*hdr));
  	skb_trim(skb, dlen);
  
  	ep->rcv_seq += dlen;
  	BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
  
  	switch (state_read(&ep->com)) {
  	case MPA_REQ_SENT:
  		process_mpa_reply(ep, skb);
  		break;
  	case MPA_REQ_WAIT:
  		process_mpa_request(ep, skb);
  		break;
  	case MPA_REP_SENT:
  		break;
  	default:
  		printk(KERN_ERR MOD "%s Unexpected streaming data."
  		       " ep %p state %d tid %d\n",
  		       __func__, ep, state_read(&ep->com), ep->hwtid);
  
  		/*
  		 * The ep will timeout and inform the ULP of the failure.
  		 * See ep_timeout().
  		 */
  		break;
  	}
  
  	/* update RX credits */
  	update_rx_credits(ep, dlen);
  
  	return CPL_RET_BUF_DONE;
  }
  
  /*
   * 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 tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct cpl_wr_ack *hdr = cplhdr(skb);
  	unsigned int credits = ntohs(hdr->credits);
  
  	PDBG("%s ep %p credits %u\n", __func__, ep, credits);
  
  	if (credits == 0) {
  		PDBG(KERN_ERR "%s 0 credit ack  ep %p state %u\n",
  			__func__, ep, state_read(&ep->com));
  		return CPL_RET_BUF_DONE;
  	}
  
  	BUG_ON(credits != 1);
  	dst_confirm(ep->dst);
  	if (!ep->mpa_skb) {
  		PDBG("%s rdma_init wr_ack ep %p state %u\n",
  			__func__, ep, state_read(&ep->com));
  		if (ep->mpa_attr.initiator) {
  			PDBG("%s initiator ep %p state %u\n",
  				__func__, ep, state_read(&ep->com));
  			if (peer2peer)
  				iwch_post_zb_read(ep->com.qp);
  		} else {
  			PDBG("%s responder ep %p state %u\n",
  				__func__, ep, state_read(&ep->com));
  			ep->com.rpl_done = 1;
  			wake_up(&ep->com.waitq);
  		}
  	} else {
  		PDBG("%s lsm ack ep %p state %u freeing skb\n",
  			__func__, ep, state_read(&ep->com));
  		kfree_skb(ep->mpa_skb);
  		ep->mpa_skb = NULL;
  	}
  	return CPL_RET_BUF_DONE;
  }
  
  static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	unsigned long flags;
  	int release = 0;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	BUG_ON(!ep);
  
  	/*
  	 * We get 2 abort replies from the HW.  The first one must
  	 * be ignored except for scribbling that we need one more.
  	 */
  	if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
  		return CPL_RET_BUF_DONE;
  	}
  
  	spin_lock_irqsave(&ep->com.lock, flags);
  	switch (ep->com.state) {
  	case ABORTING:
  		close_complete_upcall(ep);
  		__state_set(&ep->com, DEAD);
  		release = 1;
  		break;
  	default:
  		printk(KERN_ERR "%s ep %p state %d\n",
  		     __func__, ep, ep->com.state);
  		break;
  	}
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  
  	if (release)
  		release_ep_resources(ep);
  	return CPL_RET_BUF_DONE;
  }
  
  /*
   * Return whether a failed active open has allocated a TID
   */
  static inline int act_open_has_tid(int status)
  {
  	return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
  	       status != CPL_ERR_ARP_MISS;
  }
  
  static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct cpl_act_open_rpl *rpl = cplhdr(skb);
  
  	PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
  	     status2errno(rpl->status));
  	connect_reply_upcall(ep, status2errno(rpl->status));
  	state_set(&ep->com, DEAD);
  	if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
  		release_tid(ep->com.tdev, GET_TID(rpl), NULL);
  	cxgb3_free_atid(ep->com.tdev, ep->atid);
  	dst_release(ep->dst);
  	l2t_release(L2DATA(ep->com.tdev), ep->l2t);
  	put_ep(&ep->com);
  	return CPL_RET_BUF_DONE;
  }
  
  static int listen_start(struct iwch_listen_ep *ep)
  {
  	struct sk_buff *skb;
  	struct cpl_pass_open_req *req;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n");
  		return -ENOMEM;
  	}
  
  	req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
  	req->local_port = ep->com.local_addr.sin_port;
  	req->local_ip = ep->com.local_addr.sin_addr.s_addr;
  	req->peer_port = 0;
  	req->peer_ip = 0;
  	req->peer_netmask = 0;
  	req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
  	req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
  	req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
  
  	skb->priority = 1;
  	return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
  }
  
  static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_listen_ep *ep = ctx;
  	struct cpl_pass_open_rpl *rpl = cplhdr(skb);
  
  	PDBG("%s ep %p status %d error %d\n", __func__, ep,
  	     rpl->status, status2errno(rpl->status));
  	ep->com.rpl_err = status2errno(rpl->status);
  	ep->com.rpl_done = 1;
  	wake_up(&ep->com.waitq);
  
  	return CPL_RET_BUF_DONE;
  }
  
  static int listen_stop(struct iwch_listen_ep *ep)
  {
  	struct sk_buff *skb;
  	struct cpl_close_listserv_req *req;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  	if (!skb) {
  		printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
  		return -ENOMEM;
  	}
  	req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req));
  	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	req->cpu_idx = 0;
  	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
  	skb->priority = 1;
  	return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
  }
  
  static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
  			     void *ctx)
  {
  	struct iwch_listen_ep *ep = ctx;
  	struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
  
  	PDBG("%s ep %p\n", __func__, ep);
  	ep->com.rpl_err = status2errno(rpl->status);
  	ep->com.rpl_done = 1;
  	wake_up(&ep->com.waitq);
  	return CPL_RET_BUF_DONE;
  }
  
  static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
  {
  	struct cpl_pass_accept_rpl *rpl;
  	unsigned int mtu_idx;
  	u32 opt0h, opt0l, opt2;
  	int wscale;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	BUG_ON(skb_cloned(skb));
  	skb_trim(skb, sizeof(*rpl));
  	skb_get(skb);
  	mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
  	wscale = compute_wscale(rcv_win);
  	opt0h = V_NAGLE(0) |
  	    V_NO_CONG(nocong) |
  	    V_KEEP_ALIVE(1) |
  	    F_TCAM_BYPASS |
  	    V_WND_SCALE(wscale) |
  	    V_MSS_IDX(mtu_idx) |
  	    V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
  	opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
  	opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor);
  
  	rpl = cplhdr(skb);
  	rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  	OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
  	rpl->peer_ip = peer_ip;
  	rpl->opt0h = htonl(opt0h);
  	rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
  	rpl->opt2 = htonl(opt2);
  	rpl->rsvd = rpl->opt2;	/* workaround for HW bug */
  	skb->priority = CPL_PRIORITY_SETUP;
  	iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
  
  	return;
  }
  
  static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
  		      struct sk_buff *skb)
  {
  	PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
  	     peer_ip);
  	BUG_ON(skb_cloned(skb));
  	skb_trim(skb, sizeof(struct cpl_tid_release));
  	skb_get(skb);
  
  	if (tdev->type != T3A)
  		release_tid(tdev, hwtid, skb);
  	else {
  		struct cpl_pass_accept_rpl *rpl;
  
  		rpl = cplhdr(skb);
  		skb->priority = CPL_PRIORITY_SETUP;
  		rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
  		OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
  						      hwtid));
  		rpl->peer_ip = peer_ip;
  		rpl->opt0h = htonl(F_TCAM_BYPASS);
  		rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
  		rpl->opt2 = 0;
  		rpl->rsvd = rpl->opt2;
  		iwch_cxgb3_ofld_send(tdev, skb);
  	}
  }
  
  static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *child_ep, *parent_ep = ctx;
  	struct cpl_pass_accept_req *req = cplhdr(skb);
  	unsigned int hwtid = GET_TID(req);
  	struct dst_entry *dst;
  	struct l2t_entry *l2t;
  	struct rtable *rt;
  	struct iff_mac tim;
  
  	PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
  
  	if (state_read(&parent_ep->com) != LISTEN) {
  		printk(KERN_ERR "%s - listening ep not in LISTEN\n",
  		       __func__);
  		goto reject;
  	}
  
  	/*
  	 * Find the netdev for this connection request.
  	 */
  	tim.mac_addr = req->dst_mac;
  	tim.vlan_tag = ntohs(req->vlan_tag);
  	if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
  		printk(KERN_ERR
  			"%s bad dst mac %02x %02x %02x %02x %02x %02x\n",
  			__func__,
  			req->dst_mac[0],
  			req->dst_mac[1],
  			req->dst_mac[2],
  			req->dst_mac[3],
  			req->dst_mac[4],
  			req->dst_mac[5]);
  		goto reject;
  	}
  
  	/* Find output route */
  	rt = find_route(tdev,
  			req->local_ip,
  			req->peer_ip,
  			req->local_port,
  			req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
  	if (!rt) {
  		printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
  		       __func__);
  		goto reject;
  	}
  	dst = &rt->u.dst;
  	l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev);
  	if (!l2t) {
  		printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
  		       __func__);
  		dst_release(dst);
  		goto reject;
  	}
  	child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
  	if (!child_ep) {
  		printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
  		       __func__);
  		l2t_release(L2DATA(tdev), l2t);
  		dst_release(dst);
  		goto reject;
  	}
  	state_set(&child_ep->com, CONNECTING);
  	child_ep->com.tdev = tdev;
  	child_ep->com.cm_id = NULL;
  	child_ep->com.local_addr.sin_family = PF_INET;
  	child_ep->com.local_addr.sin_port = req->local_port;
  	child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
  	child_ep->com.remote_addr.sin_family = PF_INET;
  	child_ep->com.remote_addr.sin_port = req->peer_port;
  	child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
  	get_ep(&parent_ep->com);
  	child_ep->parent_ep = parent_ep;
  	child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
  	child_ep->l2t = l2t;
  	child_ep->dst = dst;
  	child_ep->hwtid = hwtid;
  	init_timer(&child_ep->timer);
  	cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
  	accept_cr(child_ep, req->peer_ip, skb);
  	goto out;
  reject:
  	reject_cr(tdev, hwtid, req->peer_ip, skb);
  out:
  	return CPL_RET_BUF_DONE;
  }
  
  static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct cpl_pass_establish *req = cplhdr(skb);
  
  	PDBG("%s ep %p\n", __func__, ep);
  	ep->snd_seq = ntohl(req->snd_isn);
  	ep->rcv_seq = ntohl(req->rcv_isn);
  
  	set_emss(ep, ntohs(req->tcp_opt));
  
  	dst_confirm(ep->dst);
  	state_set(&ep->com, MPA_REQ_WAIT);
  	start_ep_timer(ep);
  
  	return CPL_RET_BUF_DONE;
  }
  
  static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct iwch_qp_attributes attrs;
  	unsigned long flags;
  	int disconnect = 1;
  	int release = 0;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	dst_confirm(ep->dst);
  
  	spin_lock_irqsave(&ep->com.lock, flags);
  	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 iwch_accept_cr()).
  		 */
  		__state_set(&ep->com, CLOSING);
  		ep->com.rpl_done = 1;
  		ep->com.rpl_err = -ECONNRESET;
  		PDBG("waking up ep %p\n", ep);
  		wake_up(&ep->com.waitq);
  		break;
  	case MPA_REP_SENT:
  		__state_set(&ep->com, CLOSING);
  		ep->com.rpl_done = 1;
  		ep->com.rpl_err = -ECONNRESET;
  		PDBG("waking up ep %p\n", ep);
  		wake_up(&ep->com.waitq);
  		break;
  	case FPDU_MODE:
  		start_ep_timer(ep);
  		__state_set(&ep->com, CLOSING);
  		attrs.next_state = IWCH_QP_STATE_CLOSING;
  		iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
  			       IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
  		peer_close_upcall(ep);
  		break;
  	case ABORTING:
  		disconnect = 0;
  		break;
  	case CLOSING:
  		__state_set(&ep->com, MORIBUND);
  		disconnect = 0;
  		break;
  	case MORIBUND:
  		stop_ep_timer(ep);
  		if (ep->com.cm_id && ep->com.qp) {
  			attrs.next_state = IWCH_QP_STATE_IDLE;
  			iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
  				       IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
  		}
  		close_complete_upcall(ep);
  		__state_set(&ep->com, DEAD);
  		release = 1;
  		disconnect = 0;
  		break;
  	case DEAD:
  		disconnect = 0;
  		break;
  	default:
  		BUG_ON(1);
  	}
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  	if (disconnect)
  		iwch_ep_disconnect(ep, 0, GFP_KERNEL);
  	if (release)
  		release_ep_resources(ep);
  	return CPL_RET_BUF_DONE;
  }
  
  /*
   * Returns whether an ABORT_REQ_RSS message is a negative advice.
   */
  static int is_neg_adv_abort(unsigned int status)
  {
  	return status == CPL_ERR_RTX_NEG_ADVICE ||
  	       status == CPL_ERR_PERSIST_NEG_ADVICE;
  }
  
  static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct cpl_abort_req_rss *req = cplhdr(skb);
  	struct iwch_ep *ep = ctx;
  	struct cpl_abort_rpl *rpl;
  	struct sk_buff *rpl_skb;
  	struct iwch_qp_attributes attrs;
  	int ret;
  	int release = 0;
  	unsigned long flags;
  
  	if (is_neg_adv_abort(req->status)) {
  		PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
  		     ep->hwtid);
  		t3_l2t_send_event(ep->com.tdev, ep->l2t);
  		return CPL_RET_BUF_DONE;
  	}
  
  	/*
  	 * We get 2 peer aborts from the HW.  The first one must
  	 * be ignored except for scribbling that we need one more.
  	 */
  	if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
  		return CPL_RET_BUF_DONE;
  	}
  
  	spin_lock_irqsave(&ep->com.lock, flags);
  	PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state);
  	switch (ep->com.state) {
  	case CONNECTING:
  		break;
  	case MPA_REQ_WAIT:
  		stop_ep_timer(ep);
  		break;
  	case MPA_REQ_SENT:
  		stop_ep_timer(ep);
  		connect_reply_upcall(ep, -ECONNRESET);
  		break;
  	case MPA_REP_SENT:
  		ep->com.rpl_done = 1;
  		ep->com.rpl_err = -ECONNRESET;
  		PDBG("waking up ep %p\n", ep);
  		wake_up(&ep->com.waitq);
  		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 iwch_accept_cr()).
  		 */
  		ep->com.rpl_done = 1;
  		ep->com.rpl_err = -ECONNRESET;
  		PDBG("waking up ep %p\n", ep);
  		wake_up(&ep->com.waitq);
  		break;
  	case MORIBUND:
  	case CLOSING:
  		stop_ep_timer(ep);
  		/*FALLTHROUGH*/
  	case FPDU_MODE:
  		if (ep->com.cm_id && ep->com.qp) {
  			attrs.next_state = IWCH_QP_STATE_ERROR;
  			ret = iwch_modify_qp(ep->com.qp->rhp,
  				     ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
  				     &attrs, 1);
  			if (ret)
  				printk(KERN_ERR MOD
  				       "%s - qp <- error failed!\n",
  				       __func__);
  		}
  		peer_abort_upcall(ep);
  		break;
  	case ABORTING:
  		break;
  	case DEAD:
  		PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
  		spin_unlock_irqrestore(&ep->com.lock, flags);
  		return CPL_RET_BUF_DONE;
  	default:
  		BUG_ON(1);
  		break;
  	}
  	dst_confirm(ep->dst);
  	if (ep->com.state != ABORTING) {
  		__state_set(&ep->com, DEAD);
  		release = 1;
  	}
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  
  	rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
  	if (!rpl_skb) {
  		printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
  		       __func__);
  		release = 1;
  		goto out;
  	}
  	rpl_skb->priority = CPL_PRIORITY_DATA;
  	rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
  	rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
  	rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
  	OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
  	rpl->cmd = CPL_ABORT_NO_RST;
  	iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
  out:
  	if (release)
  		release_ep_resources(ep);
  	return CPL_RET_BUF_DONE;
  }
  
  static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  	struct iwch_qp_attributes attrs;
  	unsigned long flags;
  	int release = 0;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	BUG_ON(!ep);
  
  	/* The cm_id may be null if we failed to connect */
  	spin_lock_irqsave(&ep->com.lock, flags);
  	switch (ep->com.state) {
  	case CLOSING:
  		__state_set(&ep->com, MORIBUND);
  		break;
  	case MORIBUND:
  		stop_ep_timer(ep);
  		if ((ep->com.cm_id) && (ep->com.qp)) {
  			attrs.next_state = IWCH_QP_STATE_IDLE;
  			iwch_modify_qp(ep->com.qp->rhp,
  					     ep->com.qp,
  					     IWCH_QP_ATTR_NEXT_STATE,
  					     &attrs, 1);
  		}
  		close_complete_upcall(ep);
  		__state_set(&ep->com, DEAD);
  		release = 1;
  		break;
  	case ABORTING:
  	case DEAD:
  		break;
  	default:
  		BUG_ON(1);
  		break;
  	}
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  	if (release)
  		release_ep_resources(ep);
  	return CPL_RET_BUF_DONE;
  }
  
  /*
   * T3A does 3 things when a TERM is received:
   * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet
   * 2) generate an async event on the QP with the TERMINATE opcode
   * 3) post a TERMINATE opcde cqe into the associated CQ.
   *
   * For (1), we save the message in the qp for later consumer consumption.
   * For (2), we move the QP into TERMINATE, post a QP event and disconnect.
   * For (3), we toss the CQE in cxio_poll_cq().
   *
   * terminate() handles case (1)...
   */
  static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep *ep = ctx;
  
  	if (state_read(&ep->com) != FPDU_MODE)
  		return CPL_RET_BUF_DONE;
  
  	PDBG("%s ep %p\n", __func__, ep);
  	skb_pull(skb, sizeof(struct cpl_rdma_terminate));
  	PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
  	skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
  				  skb->len);
  	ep->com.qp->attr.terminate_msg_len = skb->len;
  	ep->com.qp->attr.is_terminate_local = 0;
  	return CPL_RET_BUF_DONE;
  }
  
  static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct cpl_rdma_ec_status *rep = cplhdr(skb);
  	struct iwch_ep *ep = ctx;
  
  	PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
  	     rep->status);
  	if (rep->status) {
  		struct iwch_qp_attributes attrs;
  
  		printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n",
  		       __func__, ep->hwtid);
  		stop_ep_timer(ep);
  		attrs.next_state = IWCH_QP_STATE_ERROR;
  		iwch_modify_qp(ep->com.qp->rhp,
  			       ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
  			       &attrs, 1);
  		abort_connection(ep, NULL, GFP_KERNEL);
  	}
  	return CPL_RET_BUF_DONE;
  }
  
  static void ep_timeout(unsigned long arg)
  {
  	struct iwch_ep *ep = (struct iwch_ep *)arg;
  	struct iwch_qp_attributes attrs;
  	unsigned long flags;
  	int abort = 1;
  
  	spin_lock_irqsave(&ep->com.lock, flags);
  	PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
  	     ep->com.state);
  	switch (ep->com.state) {
  	case MPA_REQ_SENT:
  		__state_set(&ep->com, ABORTING);
  		connect_reply_upcall(ep, -ETIMEDOUT);
  		break;
  	case MPA_REQ_WAIT:
  		__state_set(&ep->com, ABORTING);
  		break;
  	case CLOSING:
  	case MORIBUND:
  		if (ep->com.cm_id && ep->com.qp) {
  			attrs.next_state = IWCH_QP_STATE_ERROR;
  			iwch_modify_qp(ep->com.qp->rhp,
  				     ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
  				     &attrs, 1);
  		}
  		__state_set(&ep->com, ABORTING);
  		break;
  	default:
  		printk(KERN_ERR "%s unexpected state ep %p state %u\n",
  			__func__, ep, ep->com.state);
  		WARN_ON(1);
  		abort = 0;
  	}
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  	if (abort)
  		abort_connection(ep, NULL, GFP_ATOMIC);
  	put_ep(&ep->com);
  }
  
  int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
  {
  	int err;
  	struct iwch_ep *ep = to_ep(cm_id);
  	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  
  	if (state_read(&ep->com) == DEAD) {
  		put_ep(&ep->com);
  		return -ECONNRESET;
  	}
  	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
  	if (mpa_rev == 0)
  		abort_connection(ep, NULL, GFP_KERNEL);
  	else {
  		err = send_mpa_reject(ep, pdata, pdata_len);
  		err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
  	}
  	put_ep(&ep->com);
  	return 0;
  }
  
  int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
  {
  	int err;
  	struct iwch_qp_attributes attrs;
  	enum iwch_qp_attr_mask mask;
  	struct iwch_ep *ep = to_ep(cm_id);
  	struct iwch_dev *h = to_iwch_dev(cm_id->device);
  	struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
  
  	PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  	if (state_read(&ep->com) == DEAD) {
  		err = -ECONNRESET;
  		goto err;
  	}
  
  	BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
  	BUG_ON(!qp);
  
  	if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
  	    (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
  		abort_connection(ep, NULL, GFP_KERNEL);
  		err = -EINVAL;
  		goto err;
  	}
  
  	cm_id->add_ref(cm_id);
  	ep->com.cm_id = cm_id;
  	ep->com.qp = qp;
  
  	ep->ird = conn_param->ird;
  	ep->ord = conn_param->ord;
  
  	if (peer2peer && ep->ird == 0)
  		ep->ird = 1;
  
  	PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
  
  	/* 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 = IWCH_QP_STATE_RTS;
  
  	/* bind QP and TID with INIT_WR */
  	mask = IWCH_QP_ATTR_NEXT_STATE |
  			     IWCH_QP_ATTR_LLP_STREAM_HANDLE |
  			     IWCH_QP_ATTR_MPA_ATTR |
  			     IWCH_QP_ATTR_MAX_IRD |
  			     IWCH_QP_ATTR_MAX_ORD;
  
  	err = iwch_modify_qp(ep->com.qp->rhp,
  			     ep->com.qp, mask, &attrs, 1);
  	if (err)
  		goto err1;
  
  	/* if needed, wait for wr_ack */
  	if (iwch_rqes_posted(qp)) {
  		wait_event(ep->com.waitq, ep->com.rpl_done);
  		err = ep->com.rpl_err;
  		if (err)
  			goto err1;
  	}
  
  	err = send_mpa_reply(ep, conn_param->private_data,
  			     conn_param->private_data_len);
  	if (err)
  		goto err1;
  
  
  	state_set(&ep->com, FPDU_MODE);
  	established_upcall(ep);
  	put_ep(&ep->com);
  	return 0;
  err1:
  	ep->com.cm_id = NULL;
  	ep->com.qp = NULL;
  	cm_id->rem_ref(cm_id);
  err:
  	put_ep(&ep->com);
  	return err;
  }
  
  static int is_loopback_dst(struct iw_cm_id *cm_id)
  {
  	struct net_device *dev;
  
  	dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr);
  	if (!dev)
  		return 0;
  	dev_put(dev);
  	return 1;
  }
  
  int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
  {
  	int err = 0;
  	struct iwch_dev *h = to_iwch_dev(cm_id->device);
  	struct iwch_ep *ep;
  	struct rtable *rt;
  
  	if (is_loopback_dst(cm_id)) {
  		err = -ENOSYS;
  		goto out;
  	}
  
  	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
  	if (!ep) {
  		printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
  		err = -ENOMEM;
  		goto out;
  	}
  	init_timer(&ep->timer);
  	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.tdev = h->rdev.t3cdev_p;
  
  	cm_id->add_ref(cm_id);
  	ep->com.cm_id = cm_id;
  	ep->com.qp = get_qhp(h, conn_param->qpn);
  	BUG_ON(!ep->com.qp);
  	PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
  	     ep->com.qp, cm_id);
  
  	/*
  	 * Allocate an active TID to initiate a TCP connection.
  	 */
  	ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
  	if (ep->atid == -1) {
  		printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
  		err = -ENOMEM;
  		goto fail2;
  	}
  
  	/* find a route */
  	rt = find_route(h->rdev.t3cdev_p,
  			cm_id->local_addr.sin_addr.s_addr,
  			cm_id->remote_addr.sin_addr.s_addr,
  			cm_id->local_addr.sin_port,
  			cm_id->remote_addr.sin_port, IPTOS_LOWDELAY);
  	if (!rt) {
  		printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
  		err = -EHOSTUNREACH;
  		goto fail3;
  	}
  	ep->dst = &rt->u.dst;
  
  	/* get a l2t entry */
  	ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour,
  			     ep->dst->neighbour->dev);
  	if (!ep->l2t) {
  		printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
  		err = -ENOMEM;
  		goto fail4;
  	}
  
  	state_set(&ep->com, CONNECTING);
  	ep->tos = IPTOS_LOWDELAY;
  	ep->com.local_addr = cm_id->local_addr;
  	ep->com.remote_addr = cm_id->remote_addr;
  
  	/* send connect request to rnic */
  	err = send_connect(ep);
  	if (!err)
  		goto out;
  
  	l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t);
  fail4:
  	dst_release(ep->dst);
  fail3:
  	cxgb3_free_atid(ep->com.tdev, ep->atid);
  fail2:
  	cm_id->rem_ref(cm_id);
  	put_ep(&ep->com);
  out:
  	return err;
  }
  
  int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
  {
  	int err = 0;
  	struct iwch_dev *h = to_iwch_dev(cm_id->device);
  	struct iwch_listen_ep *ep;
  
  
  	might_sleep();
  
  	ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
  	if (!ep) {
  		printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
  		err = -ENOMEM;
  		goto fail1;
  	}
  	PDBG("%s ep %p\n", __func__, ep);
  	ep->com.tdev = h->rdev.t3cdev_p;
  	cm_id->add_ref(cm_id);
  	ep->com.cm_id = cm_id;
  	ep->backlog = backlog;
  	ep->com.local_addr = cm_id->local_addr;
  
  	/*
  	 * Allocate a server TID.
  	 */
  	ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
  	if (ep->stid == -1) {
  		printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
  		err = -ENOMEM;
  		goto fail2;
  	}
  
  	state_set(&ep->com, LISTEN);
  	err = listen_start(ep);
  	if (err)
  		goto fail3;
  
  	/* wait for pass_open_rpl */
  	wait_event(ep->com.waitq, ep->com.rpl_done);
  	err = ep->com.rpl_err;
  	if (!err) {
  		cm_id->provider_data = ep;
  		goto out;
  	}
  fail3:
  	cxgb3_free_stid(ep->com.tdev, ep->stid);
  fail2:
  	cm_id->rem_ref(cm_id);
  	put_ep(&ep->com);
  fail1:
  out:
  	return err;
  }
  
  int iwch_destroy_listen(struct iw_cm_id *cm_id)
  {
  	int err;
  	struct iwch_listen_ep *ep = to_listen_ep(cm_id);
  
  	PDBG("%s ep %p\n", __func__, ep);
  
  	might_sleep();
  	state_set(&ep->com, DEAD);
  	ep->com.rpl_done = 0;
  	ep->com.rpl_err = 0;
  	err = listen_stop(ep);
  	if (err)
  		goto done;
  	wait_event(ep->com.waitq, ep->com.rpl_done);
  	cxgb3_free_stid(ep->com.tdev, ep->stid);
  done:
  	err = ep->com.rpl_err;
  	cm_id->rem_ref(cm_id);
  	put_ep(&ep->com);
  	return err;
  }
  
  int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
  {
  	int ret=0;
  	unsigned long flags;
  	int close = 0;
  	int fatal = 0;
  	struct t3cdev *tdev;
  	struct cxio_rdev *rdev;
  
  	spin_lock_irqsave(&ep->com.lock, flags);
  
  	PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
  	     states[ep->com.state], abrupt);
  
  	tdev = (struct t3cdev *)ep->com.tdev;
  	rdev = (struct cxio_rdev *)tdev->ulp;
  	if (cxio_fatal_error(rdev)) {
  		fatal = 1;
  		close_complete_upcall(ep);
  		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:
  		close = 1;
  		if (abrupt)
  			ep->com.state = ABORTING;
  		else {
  			ep->com.state = CLOSING;
  			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) {
  				stop_ep_timer(ep);
  				ep->com.state = ABORTING;
  			} else
  				ep->com.state = MORIBUND;
  		}
  		break;
  	case MORIBUND:
  	case ABORTING:
  	case DEAD:
  		PDBG("%s ignoring disconnect ep %p state %u\n",
  		     __func__, ep, ep->com.state);
  		break;
  	default:
  		BUG();
  		break;
  	}
  
  	spin_unlock_irqrestore(&ep->com.lock, flags);
  	if (close) {
  		if (abrupt)
  			ret = send_abort(ep, NULL, gfp);
  		else
  			ret = send_halfclose(ep, gfp);
  		if (ret)
  			fatal = 1;
  	}
  	if (fatal)
  		release_ep_resources(ep);
  	return ret;
  }
  
  int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
  		     struct l2t_entry *l2t)
  {
  	struct iwch_ep *ep = ctx;
  
  	if (ep->dst != old)
  		return 0;
  
  	PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
  	     l2t);
  	dst_hold(new);
  	l2t_release(L2DATA(ep->com.tdev), ep->l2t);
  	ep->l2t = l2t;
  	dst_release(old);
  	ep->dst = new;
  	return 1;
  }
  
  /*
   * All the CM events are handled on a work queue to have a safe context.
   */
  static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct iwch_ep_common *epc = ctx;
  
  	get_ep(epc);
  
  	/*
  	 * Save ctx and tdev in the skb->cb area.
  	 */
  	*((void **) skb->cb) = ctx;
  	*((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
  
  	/*
  	 * 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 t3cdev *tdev, struct sk_buff *skb, void *ctx)
  {
  	struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
  
  	if (rpl->status != CPL_ERR_NONE) {
  		printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
  		       "for tid %u\n", rpl->status, GET_TID(rpl));
  	}
  	return CPL_RET_BUF_DONE;
  }
  
  int __init iwch_cm_init(void)
  {
  	skb_queue_head_init(&rxq);
  
  	workq = create_singlethread_workqueue("iw_cxgb3");
  	if (!workq)
  		return -ENOMEM;
  
  	/*
  	 * All upcalls from the T3 Core go to sched() to
  	 * schedule the processing on a work queue.
  	 */
  	t3c_handlers[CPL_ACT_ESTABLISH] = sched;
  	t3c_handlers[CPL_ACT_OPEN_RPL] = sched;
  	t3c_handlers[CPL_RX_DATA] = sched;
  	t3c_handlers[CPL_TX_DMA_ACK] = sched;
  	t3c_handlers[CPL_ABORT_RPL_RSS] = sched;
  	t3c_handlers[CPL_ABORT_RPL] = sched;
  	t3c_handlers[CPL_PASS_OPEN_RPL] = sched;
  	t3c_handlers[CPL_CLOSE_LISTSRV_RPL] = sched;
  	t3c_handlers[CPL_PASS_ACCEPT_REQ] = sched;
  	t3c_handlers[CPL_PASS_ESTABLISH] = sched;
  	t3c_handlers[CPL_PEER_CLOSE] = sched;
  	t3c_handlers[CPL_CLOSE_CON_RPL] = sched;
  	t3c_handlers[CPL_ABORT_REQ_RSS] = sched;
  	t3c_handlers[CPL_RDMA_TERMINATE] = sched;
  	t3c_handlers[CPL_RDMA_EC_STATUS] = sched;
  	t3c_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl;
  
  	/*
  	 * These are the real handlers that are called from a
  	 * work queue.
  	 */
  	work_handlers[CPL_ACT_ESTABLISH] = act_establish;
  	work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl;
  	work_handlers[CPL_RX_DATA] = rx_data;
  	work_handlers[CPL_TX_DMA_ACK] = tx_ack;
  	work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl;
  	work_handlers[CPL_ABORT_RPL] = abort_rpl;
  	work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl;
  	work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl;
  	work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req;
  	work_handlers[CPL_PASS_ESTABLISH] = pass_establish;
  	work_handlers[CPL_PEER_CLOSE] = peer_close;
  	work_handlers[CPL_ABORT_REQ_RSS] = peer_abort;
  	work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl;
  	work_handlers[CPL_RDMA_TERMINATE] = terminate;
  	work_handlers[CPL_RDMA_EC_STATUS] = ec_status;
  	return 0;
  }
  
  void __exit iwch_cm_term(void)
  {
  	flush_workqueue(workq);
  	destroy_workqueue(workq);
  }
  