drivers/infiniband/hw/nes/nes_cm.c

   1 /*
   2  * Copyright (c) 2006 - 2009 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34
  35 #define TCPOPT_TIMESTAMP 8
  36
  37 #include <asm/atomic.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/ip.h>
  40 #include <linux/tcp.h>
  41 #include <linux/init.h>
  42 #include <linux/if_arp.h>
  43 #include <linux/if_vlan.h>
  44 #include <linux/notifier.h>
  45 #include <linux/net.h>
  46 #include <linux/types.h>
  47 #include <linux/timer.h>
  48 #include <linux/time.h>
  49 #include <linux/delay.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/random.h>
  53 #include <linux/list.h>
  54 #include <linux/threads.h>
  55 #include <net/arp.h>
  56 #include <net/neighbour.h>
  57 #include <net/route.h>
  58 #include <net/ip_fib.h>
  59 #include <net/tcp.h>
  60
  61 #include "nes.h"
  62
  63 u32 cm_packets_sent;
  64 u32 cm_packets_bounced;
  65 u32 cm_packets_dropped;
  66 u32 cm_packets_retrans;
  67 u32 cm_packets_created;
  68 u32 cm_packets_received;
  69 u32 cm_listens_created;
  70 u32 cm_listens_destroyed;
  71 u32 cm_backlog_drops;
  72 atomic_t cm_loopbacks;
  73 atomic_t cm_nodes_created;
  74 atomic_t cm_nodes_destroyed;
  75 atomic_t cm_accel_dropped_pkts;
  76 atomic_t cm_resets_recvd;
  77
  78 static inline int mini_cm_accelerated(struct nes_cm_core *,
  79         struct nes_cm_node *);
  80 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
  81         struct nes_vnic *, struct nes_cm_info *);
  82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
  83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
  84         struct nes_vnic *, u16, void *, struct nes_cm_info *);
  85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
  86 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
  87         struct nes_cm_node *);
  88 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
  89         struct nes_cm_node *);
  90 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
  91         struct sk_buff *);
  92 static int mini_cm_dealloc_core(struct nes_cm_core *);
  93 static int mini_cm_get(struct nes_cm_core *);
  94 static int mini_cm_set(struct nes_cm_core *, u32, u32);
  95
  96 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
  97         void *, u32, void *, u32, u8);
  98 static int add_ref_cm_node(struct nes_cm_node *);
  99 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
 100
 101 static int nes_cm_disconn_true(struct nes_qp *);
 102 static int nes_cm_post_event(struct nes_cm_event *event);
 103 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
 104 static void nes_disconnect_worker(struct work_struct *work);
 105
 106 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
 107 static int send_mpa_reject(struct nes_cm_node *);
 108 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
 109 static int send_reset(struct nes_cm_node *, struct sk_buff *);
 110 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
 111 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
 112 static void process_packet(struct nes_cm_node *, struct sk_buff *,
 113         struct nes_cm_core *);
 114
 115 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
 116 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
 117 static void cleanup_retrans_entry(struct nes_cm_node *);
 118 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
 119 static void free_retrans_entry(struct nes_cm_node *cm_node);
 120 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
 121         struct sk_buff *skb, int optionsize, int passive);
 122
 123 /* CM event handler functions */
 124 static void cm_event_connected(struct nes_cm_event *);
 125 static void cm_event_connect_error(struct nes_cm_event *);
 126 static void cm_event_reset(struct nes_cm_event *);
 127 static void cm_event_mpa_req(struct nes_cm_event *);
 128 static void cm_event_mpa_reject(struct nes_cm_event *);
 129 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
 130
 131 static void print_core(struct nes_cm_core *core);
 132
 133 /* External CM API Interface */
 134 /* instance of function pointers for client API */
 135 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
 136 static struct nes_cm_ops nes_cm_api = {
 137         mini_cm_accelerated,
 138         mini_cm_listen,
 139         mini_cm_del_listen,
 140         mini_cm_connect,
 141         mini_cm_close,
 142         mini_cm_accept,
 143         mini_cm_reject,
 144         mini_cm_recv_pkt,
 145         mini_cm_dealloc_core,
 146         mini_cm_get,
 147         mini_cm_set
 148 };
 149
 150 static struct nes_cm_core *g_cm_core;
 151
 152 atomic_t cm_connects;
 153 atomic_t cm_accepts;
 154 atomic_t cm_disconnects;
 155 atomic_t cm_closes;
 156 atomic_t cm_connecteds;
 157 atomic_t cm_connect_reqs;
 158 atomic_t cm_rejects;
 159
 160
 161 /**
 162  * create_event
 163  */
 164 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
 165                 enum nes_cm_event_type type)
 166 {
 167         struct nes_cm_event *event;
 168
 169         if (!cm_node->cm_id)
 170                 return NULL;
 171
 172         /* allocate an empty event */
 173         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 174
 175         if (!event)
 176                 return NULL;
 177
 178         event->type = type;
 179         event->cm_node = cm_node;
 180         event->cm_info.rem_addr = cm_node->rem_addr;
 181         event->cm_info.loc_addr = cm_node->loc_addr;
 182         event->cm_info.rem_port = cm_node->rem_port;
 183         event->cm_info.loc_port = cm_node->loc_port;
 184         event->cm_info.cm_id = cm_node->cm_id;
 185
 186         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
 187                 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
 188                 cm_node, event, type, event->cm_info.loc_addr,
 189                 event->cm_info.loc_port, event->cm_info.rem_addr,
 190                 event->cm_info.rem_port);
 191
 192         nes_cm_post_event(event);
 193         return event;
 194 }
 195
 196
 197 /**
 198  * send_mpa_request
 199  */
 200 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
 201 {
 202         if (!skb) {
 203                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
 204                 return -1;
 205         }
 206
 207         /* send an MPA Request frame */
 208         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 209                         cm_node->mpa_frame_size, SET_ACK);
 210
 211         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 212 }
 213
 214
 215
 216 static int send_mpa_reject(struct nes_cm_node *cm_node)
 217 {
 218         struct sk_buff  *skb = NULL;
 219
 220         skb = dev_alloc_skb(MAX_CM_BUFFER);
 221         if (!skb) {
 222                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 223                 return -ENOMEM;
 224         }
 225
 226         /* send an MPA reject frame */
 227         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 228                         cm_node->mpa_frame_size, SET_ACK | SET_FIN);
 229
 230         cm_node->state = NES_CM_STATE_FIN_WAIT1;
 231         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 232 }
 233
 234
 235 /**
 236  * recv_mpa - process a received TCP pkt, we are expecting an
 237  * IETF MPA frame
 238  */
 239 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
 240                 u32 len)
 241 {
 242         struct ietf_mpa_frame *mpa_frame;
 243
 244         *type = NES_MPA_REQUEST_ACCEPT;
 245
 246         /* assume req frame is in tcp data payload */
 247         if (len < sizeof(struct ietf_mpa_frame)) {
 248                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
 249                 return -EINVAL;
 250         }
 251
 252         mpa_frame = (struct ietf_mpa_frame *)buffer;
 253         cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
 254         /* make sure mpa private data len is less than 512 bytes */
 255         if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
 256                 nes_debug(NES_DBG_CM, "The received Length of Private"
 257                         " Data field exceeds 512 octets\n");
 258                 return -EINVAL;
 259         }
 260         /*
 261          * make sure MPA receiver interoperate with the
 262          * received MPA version and MPA key information
 263          *
 264          */
 265         if (mpa_frame->rev != mpa_version) {
 266                 nes_debug(NES_DBG_CM, "The received mpa version"
 267                                 " can not be interoperated\n");
 268                 return -EINVAL;
 269         }
 270         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 271                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 272                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 273                         return -EINVAL;
 274                 }
 275         } else {
 276                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 277                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 278                         return -EINVAL;
 279                 }
 280         }
 281
 282         if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
 283                 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
 284                                 " complete (%x + %x != %x)\n",
 285                                 cm_node->mpa_frame_size,
 286                                 (u32)sizeof(struct ietf_mpa_frame), len);
 287                 return -EINVAL;
 288         }
 289         /* make sure it does not exceed the max size */
 290         if (len > MAX_CM_BUFFER) {
 291                 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
 292                                 " (%x + %x != %x)\n",
 293                                 cm_node->mpa_frame_size,
 294                                 (u32)sizeof(struct ietf_mpa_frame), len);
 295                 return -EINVAL;
 296         }
 297
 298         /* copy entire MPA frame to our cm_node's frame */
 299         memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
 300                         cm_node->mpa_frame_size);
 301
 302         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
 303                 *type = NES_MPA_REQUEST_REJECT;
 304         return 0;
 305 }
 306
 307
 308 /**
 309  * form_cm_frame - get a free packet and build empty frame Use
 310  * node info to build.
 311  */
 312 static void form_cm_frame(struct sk_buff *skb,
 313         struct nes_cm_node *cm_node, void *options, u32 optionsize,
 314         void *data, u32 datasize, u8 flags)
 315 {
 316         struct tcphdr *tcph;
 317         struct iphdr *iph;
 318         struct ethhdr *ethh;
 319         u8 *buf;
 320         u16 packetsize = sizeof(*iph);
 321
 322         packetsize += sizeof(*tcph);
 323         packetsize +=  optionsize + datasize;
 324
 325         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
 326
 327         skb->len = 0;
 328         buf = skb_put(skb, packetsize + ETH_HLEN);
 329
 330         ethh = (struct ethhdr *) buf;
 331         buf += ETH_HLEN;
 332
 333         iph = (struct iphdr *)buf;
 334         buf += sizeof(*iph);
 335         tcph = (struct tcphdr *)buf;
 336         skb_reset_mac_header(skb);
 337         skb_set_network_header(skb, ETH_HLEN);
 338         skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
 339         buf += sizeof(*tcph);
 340
 341         skb->ip_summed = CHECKSUM_PARTIAL;
 342         skb->protocol = htons(0x800);
 343         skb->data_len = 0;
 344         skb->mac_len = ETH_HLEN;
 345
 346         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 347         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 348         ethh->h_proto = htons(0x0800);
 349
 350         iph->version = IPVERSION;
 351         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 352         iph->tos = 0;
 353         iph->tot_len = htons(packetsize);
 354         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 355
 356         iph->frag_off = htons(0x4000);
 357         iph->ttl = 0x40;
 358         iph->protocol = 0x06;   /* IPPROTO_TCP */
 359
 360         iph->saddr = htonl(cm_node->loc_addr);
 361         iph->daddr = htonl(cm_node->rem_addr);
 362
 363         tcph->source = htons(cm_node->loc_port);
 364         tcph->dest = htons(cm_node->rem_port);
 365         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 366
 367         if (flags & SET_ACK) {
 368                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 369                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 370                 tcph->ack = 1;
 371         } else
 372                 tcph->ack_seq = 0;
 373
 374         if (flags & SET_SYN) {
 375                 cm_node->tcp_cntxt.loc_seq_num++;
 376                 tcph->syn = 1;
 377         } else
 378                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 379
 380         if (flags & SET_FIN) {
 381                 cm_node->tcp_cntxt.loc_seq_num++;
 382                 tcph->fin = 1;
 383         }
 384
 385         if (flags & SET_RST)
 386                 tcph->rst = 1;
 387
 388         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 389         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 390         tcph->urg_ptr = 0;
 391         if (optionsize)
 392                 memcpy(buf, options, optionsize);
 393         buf += optionsize;
 394         if (datasize)
 395                 memcpy(buf, data, datasize);
 396
 397         skb_shinfo(skb)->nr_frags = 0;
 398         cm_packets_created++;
 399
 400 }
 401
 402
 403 /**
 404  * print_core - dump a cm core
 405  */
 406 static void print_core(struct nes_cm_core *core)
 407 {
 408         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 409         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 410         if (!core)
 411                 return;
 412         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 413
 414         nes_debug(NES_DBG_CM, "State         : %u \n",  core->state);
 415
 416         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 417         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 418
 419         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 420
 421         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 422 }
 423
 424
 425 /**
 426  * schedule_nes_timer
 427  * note - cm_node needs to be protected before calling this. Encase in:
 428  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
 429  */
 430 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 431                 enum nes_timer_type type, int send_retrans,
 432                 int close_when_complete)
 433 {
 434         unsigned long  flags;
 435         struct nes_cm_core *cm_core = cm_node->cm_core;
 436         struct nes_timer_entry *new_send;
 437         int ret = 0;
 438         u32 was_timer_set;
 439
 440         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 441         if (!new_send)
 442                 return -ENOMEM;
 443
 444         /* new_send->timetosend = currenttime */
 445         new_send->retrycount = NES_DEFAULT_RETRYS;
 446         new_send->retranscount = NES_DEFAULT_RETRANS;
 447         new_send->skb = skb;
 448         new_send->timetosend = jiffies;
 449         new_send->type = type;
 450         new_send->netdev = cm_node->netdev;
 451         new_send->send_retrans = send_retrans;
 452         new_send->close_when_complete = close_when_complete;
 453
 454         if (type == NES_TIMER_TYPE_CLOSE) {
 455                 new_send->timetosend += (HZ/10);
 456                 if (cm_node->recv_entry) {
 457                         kfree(new_send);
 458                         WARN_ON(1);
 459                         return -EINVAL;
 460                 }
 461                 cm_node->recv_entry = new_send;
 462         }
 463
 464         if (type == NES_TIMER_TYPE_SEND) {
 465                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 466                 atomic_inc(&new_send->skb->users);
 467                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 468                 cm_node->send_entry = new_send;
 469                 add_ref_cm_node(cm_node);
 470                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 471                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 472
 473                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 474                 if (ret != NETDEV_TX_OK) {
 475                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 476                                 "(jiffies = %lu)\n", new_send, jiffies);
 477                         new_send->timetosend = jiffies;
 478                         ret = NETDEV_TX_OK;
 479                 } else {
 480                         cm_packets_sent++;
 481                         if (!send_retrans) {
 482                                 cleanup_retrans_entry(cm_node);
 483                                 if (close_when_complete)
 484                                         rem_ref_cm_node(cm_core, cm_node);
 485                                 return ret;
 486                         }
 487                 }
 488         }
 489
 490         was_timer_set = timer_pending(&cm_core->tcp_timer);
 491
 492         if (!was_timer_set) {
 493                 cm_core->tcp_timer.expires = new_send->timetosend;
 494                 add_timer(&cm_core->tcp_timer);
 495         }
 496
 497         return ret;
 498 }
 499
 500 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 501 {
 502         struct iw_cm_id *cm_id = cm_node->cm_id;
 503         switch (cm_node->state) {
 504         case NES_CM_STATE_SYN_RCVD:
 505         case NES_CM_STATE_CLOSING:
 506                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 507                 break;
 508         case NES_CM_STATE_LAST_ACK:
 509         case NES_CM_STATE_FIN_WAIT1:
 510                 if (cm_node->cm_id)
 511                         cm_id->rem_ref(cm_id);
 512                 cm_node->state = NES_CM_STATE_CLOSED;
 513                 send_reset(cm_node, NULL);
 514                 break;
 515         default:
 516                 add_ref_cm_node(cm_node);
 517                 send_reset(cm_node, NULL);
 518                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 519         }
 520 }
 521
 522 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 523 {
 524         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 525         struct iw_cm_id *cm_id = cm_node->cm_id;
 526         struct nes_qp *nesqp;
 527         unsigned long qplockflags;
 528
 529         if (!recv_entry)
 530                 return;
 531         nesqp = (struct nes_qp *)recv_entry->skb;
 532         if (nesqp) {
 533                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 534                 if (nesqp->cm_id) {
 535                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 536                                 "refcount = %d: HIT A "
 537                                 "NES_TIMER_TYPE_CLOSE with something "
 538                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 539                                 atomic_read(&nesqp->refcount));
 540                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 541                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 542                         nesqp->ibqp_state = IB_QPS_ERR;
 543                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 544                         nes_cm_disconn(nesqp);
 545                 } else {
 546                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 547                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 548                                 "refcount = %d: HIT A "
 549                                 "NES_TIMER_TYPE_CLOSE with nothing "
 550                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 551                                 atomic_read(&nesqp->refcount));
 552                 }
 553         } else if (rem_node) {
 554                 /* TIME_WAIT state */
 555                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 556         }
 557         if (cm_node->cm_id)
 558                 cm_id->rem_ref(cm_id);
 559         kfree(recv_entry);
 560         cm_node->recv_entry = NULL;
 561 }
 562
 563 /**
 564  * nes_cm_timer_tick
 565  */
 566 static void nes_cm_timer_tick(unsigned long pass)
 567 {
 568         unsigned long flags;
 569         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 570         struct nes_cm_node *cm_node;
 571         struct nes_timer_entry *send_entry, *recv_entry;
 572         struct list_head *list_core_temp;
 573         struct list_head *list_node;
 574         struct nes_cm_core *cm_core = g_cm_core;
 575         u32 settimer = 0;
 576         unsigned long timetosend;
 577         int ret = NETDEV_TX_OK;
 578
 579         struct list_head timer_list;
 580         INIT_LIST_HEAD(&timer_list);
 581         spin_lock_irqsave(&cm_core->ht_lock, flags);
 582
 583         list_for_each_safe(list_node, list_core_temp,
 584                                 &cm_core->connected_nodes) {
 585                 cm_node = container_of(list_node, struct nes_cm_node, list);
 586                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 587                         add_ref_cm_node(cm_node);
 588                         list_add(&cm_node->timer_entry, &timer_list);
 589                 }
 590         }
 591         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 592
 593         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 594                 cm_node = container_of(list_node, struct nes_cm_node,
 595                                         timer_entry);
 596                 recv_entry = cm_node->recv_entry;
 597
 598                 if (recv_entry) {
 599                         if (time_after(recv_entry->timetosend, jiffies)) {
 600                                 if (nexttimeout > recv_entry->timetosend ||
 601                                                 !settimer) {
 602                                         nexttimeout = recv_entry->timetosend;
 603                                         settimer = 1;
 604                                 }
 605                         } else
 606                                 handle_recv_entry(cm_node, 1);
 607                 }
 608
 609                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 610                 do {
 611                         send_entry = cm_node->send_entry;
 612                         if (!send_entry)
 613                                 break;
 614                         if (time_after(send_entry->timetosend, jiffies)) {
 615                                 if (cm_node->state != NES_CM_STATE_TSA) {
 616                                         if ((nexttimeout >
 617                                                 send_entry->timetosend) ||
 618                                                 !settimer) {
 619                                                 nexttimeout =
 620                                                         send_entry->timetosend;
 621                                                 settimer = 1;
 622                                         }
 623                                 } else {
 624                                         free_retrans_entry(cm_node);
 625                                 }
 626                                 break;
 627                         }
 628
 629                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 630                                 (cm_node->state == NES_CM_STATE_CLOSED)) {
 631                                 free_retrans_entry(cm_node);
 632                                 break;
 633                         }
 634
 635                         if (!send_entry->retranscount ||
 636                                 !send_entry->retrycount) {
 637                                 cm_packets_dropped++;
 638                                 free_retrans_entry(cm_node);
 639
 640                                 spin_unlock_irqrestore(
 641                                         &cm_node->retrans_list_lock, flags);
 642                                 nes_retrans_expired(cm_node);
 643                                 cm_node->state = NES_CM_STATE_CLOSED;
 644                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 645                                         flags);
 646                                 break;
 647                         }
 648                         atomic_inc(&send_entry->skb->users);
 649                         cm_packets_retrans++;
 650                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 651                                 "for node %p, jiffies = %lu, time to send = "
 652                                 "%lu, retranscount = %u, send_entry->seq_num = "
 653                                 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 654                                 "0x%08X\n", send_entry, cm_node, jiffies,
 655                                 send_entry->timetosend,
 656                                 send_entry->retranscount,
 657                                 send_entry->seq_num,
 658                                 cm_node->tcp_cntxt.rem_ack_num);
 659
 660                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 661                                 flags);
 662                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 663                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 664                         if (ret != NETDEV_TX_OK) {
 665                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 666                                         "node=%p\n", cm_node);
 667                                 cm_packets_bounced++;
 668                                 send_entry->retrycount--;
 669                                 nexttimeout = jiffies + NES_SHORT_TIME;
 670                                 settimer = 1;
 671                                 break;
 672                         } else {
 673                                 cm_packets_sent++;
 674                         }
 675                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 676                                 "%u, retry count = %u.\n",
 677                                 send_entry->retranscount,
 678                                 send_entry->retrycount);
 679                         if (send_entry->send_retrans) {
 680                                 send_entry->retranscount--;
 681                                 timetosend = (NES_RETRY_TIMEOUT <<
 682                                         (NES_DEFAULT_RETRANS - send_entry->retranscount));
 683
 684                                 send_entry->timetosend = jiffies +
 685                                         min(timetosend, NES_MAX_TIMEOUT);
 686                                 if (nexttimeout > send_entry->timetosend ||
 687                                         !settimer) {
 688                                         nexttimeout = send_entry->timetosend;
 689                                         settimer = 1;
 690                                 }
 691                         } else {
 692                                 int close_when_complete;
 693                                 close_when_complete =
 694                                         send_entry->close_when_complete;
 695                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 696                                         cm_node, cm_node->state);
 697                                 free_retrans_entry(cm_node);
 698                                 if (close_when_complete)
 699                                         rem_ref_cm_node(cm_node->cm_core,
 700                                                 cm_node);
 701                         }
 702                 } while (0);
 703
 704                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 705                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 706         }
 707
 708         if (settimer) {
 709                 if (!timer_pending(&cm_core->tcp_timer)) {
 710                         cm_core->tcp_timer.expires  = nexttimeout;
 711                         add_timer(&cm_core->tcp_timer);
 712                 }
 713         }
 714 }
 715
 716
 717 /**
 718  * send_syn
 719  */
 720 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 721         struct sk_buff *skb)
 722 {
 723         int ret;
 724         int flags = SET_SYN;
 725         char optionsbuffer[sizeof(struct option_mss) +
 726                 sizeof(struct option_windowscale) + sizeof(struct option_base) +
 727                 TCP_OPTIONS_PADDING];
 728
 729         int optionssize = 0;
 730         /* Sending MSS option */
 731         union all_known_options *options;
 732
 733         if (!cm_node)
 734                 return -EINVAL;
 735
 736         options = (union all_known_options *)&optionsbuffer[optionssize];
 737         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 738         options->as_mss.length = sizeof(struct option_mss);
 739         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 740         optionssize += sizeof(struct option_mss);
 741
 742         options = (union all_known_options *)&optionsbuffer[optionssize];
 743         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 744         options->as_windowscale.length = sizeof(struct option_windowscale);
 745         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 746         optionssize += sizeof(struct option_windowscale);
 747
 748         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 749                 options = (union all_known_options *)&optionsbuffer[optionssize];
 750                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 751                 options->as_base.length = sizeof(struct option_base);
 752                 optionssize += sizeof(struct option_base);
 753                 /* we need the size to be a multiple of 4 */
 754                 options = (union all_known_options *)&optionsbuffer[optionssize];
 755                 options->as_end = 1;
 756                 optionssize += 1;
 757                 options = (union all_known_options *)&optionsbuffer[optionssize];
 758                 options->as_end = 1;
 759                 optionssize += 1;
 760         }
 761
 762         options = (union all_known_options *)&optionsbuffer[optionssize];
 763         options->as_end = OPTION_NUMBER_END;
 764         optionssize += 1;
 765
 766         if (!skb)
 767                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 768         if (!skb) {
 769                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 770                 return -1;
 771         }
 772
 773         if (sendack)
 774                 flags |= SET_ACK;
 775
 776         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
 777         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 778
 779         return ret;
 780 }
 781
 782
 783 /**
 784  * send_reset
 785  */
 786 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
 787 {
 788         int ret;
 789         int flags = SET_RST | SET_ACK;
 790
 791         if (!skb)
 792                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 793         if (!skb) {
 794                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 795                 return -ENOMEM;
 796         }
 797
 798         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
 799         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
 800
 801         return ret;
 802 }
 803
 804
 805 /**
 806  * send_ack
 807  */
 808 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
 809 {
 810         int ret;
 811
 812         if (!skb)
 813                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 814
 815         if (!skb) {
 816                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 817                 return -1;
 818         }
 819
 820         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
 821         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
 822
 823         return ret;
 824 }
 825
 826
 827 /**
 828  * send_fin
 829  */
 830 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
 831 {
 832         int ret;
 833
 834         /* if we didn't get a frame get one */
 835         if (!skb)
 836                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 837
 838         if (!skb) {
 839                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 840                 return -1;
 841         }
 842
 843         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
 844         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 845
 846         return ret;
 847 }
 848
 849
 850 /**
 851  * find_node - find a cm node that matches the reference cm node
 852  */
 853 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
 854                 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
 855 {
 856         unsigned long flags;
 857         struct list_head *hte;
 858         struct nes_cm_node *cm_node;
 859
 860         /* get a handle on the hte */
 861         hte = &cm_core->connected_nodes;
 862
 863         /* walk list and find cm_node associated with this session ID */
 864         spin_lock_irqsave(&cm_core->ht_lock, flags);
 865         list_for_each_entry(cm_node, hte, list) {
 866                 /* compare quad, return node handle if a match */
 867                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
 868                                 cm_node->loc_addr, cm_node->loc_port,
 869                                 loc_addr, loc_port,
 870                                 cm_node->rem_addr, cm_node->rem_port,
 871                                 rem_addr, rem_port);
 872                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
 873                                 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
 874                         add_ref_cm_node(cm_node);
 875                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 876                         return cm_node;
 877                 }
 878         }
 879         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 880
 881         /* no owner node */
 882         return NULL;
 883 }
 884
 885
 886 /**
 887  * find_listener - find a cm node listening on this addr-port pair
 888  */
 889 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
 890                 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
 891 {
 892         unsigned long flags;
 893         struct nes_cm_listener *listen_node;
 894
 895         /* walk list and find cm_node associated with this session ID */
 896         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
 897         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
 898                 /* compare node pair, return node handle if a match */
 899                 if (((listen_node->loc_addr == dst_addr) ||
 900                                 listen_node->loc_addr == 0x00000000) &&
 901                                 (listen_node->loc_port == dst_port) &&
 902                                 (listener_state & listen_node->listener_state)) {
 903                         atomic_inc(&listen_node->ref_count);
 904                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 905                         return listen_node;
 906                 }
 907         }
 908         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 909
 910         /* no listener */
 911         return NULL;
 912 }
 913
 914
 915 /**
 916  * add_hte_node - add a cm node to the hash table
 917  */
 918 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
 919 {
 920         unsigned long flags;
 921         struct list_head *hte;
 922
 923         if (!cm_node || !cm_core)
 924                 return -EINVAL;
 925
 926         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
 927                 cm_node);
 928
 929         spin_lock_irqsave(&cm_core->ht_lock, flags);
 930
 931         /* get a handle on the hash table element (list head for this slot) */
 932         hte = &cm_core->connected_nodes;
 933         list_add_tail(&cm_node->list, hte);
 934         atomic_inc(&cm_core->ht_node_cnt);
 935
 936         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 937
 938         return 0;
 939 }
 940
 941
 942 /**
 943  * mini_cm_dec_refcnt_listen
 944  */
 945 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
 946         struct nes_cm_listener *listener, int free_hanging_nodes)
 947 {
 948         int ret = -EINVAL;
 949         int err = 0;
 950         unsigned long flags;
 951         struct list_head *list_pos = NULL;
 952         struct list_head *list_temp = NULL;
 953         struct nes_cm_node *cm_node = NULL;
 954         struct list_head reset_list;
 955
 956         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
 957                 "refcnt=%d\n", listener, free_hanging_nodes,
 958                 atomic_read(&listener->ref_count));
 959         /* free non-accelerated child nodes for this listener */
 960         INIT_LIST_HEAD(&reset_list);
 961         if (free_hanging_nodes) {
 962                 spin_lock_irqsave(&cm_core->ht_lock, flags);
 963                 list_for_each_safe(list_pos, list_temp,
 964                                    &g_cm_core->connected_nodes) {
 965                         cm_node = container_of(list_pos, struct nes_cm_node,
 966                                 list);
 967                         if ((cm_node->listener == listener) &&
 968                             (!cm_node->accelerated)) {
 969                                 add_ref_cm_node(cm_node);
 970                                 list_add(&cm_node->reset_entry, &reset_list);
 971                         }
 972                 }
 973                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 974         }
 975
 976         list_for_each_safe(list_pos, list_temp, &reset_list) {
 977                 cm_node = container_of(list_pos, struct nes_cm_node,
 978                                 reset_entry);
 979                 {
 980                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
 981                         enum nes_cm_node_state old_state;
 982                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
 983                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 984                         } else {
 985                                 if (!loopback) {
 986                                         cleanup_retrans_entry(cm_node);
 987                                         err = send_reset(cm_node, NULL);
 988                                         if (err) {
 989                                                 cm_node->state =
 990                                                          NES_CM_STATE_CLOSED;
 991                                                 WARN_ON(1);
 992                                         } else {
 993                                                 old_state = cm_node->state;
 994                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
 995                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
 996                                                         rem_ref_cm_node(
 997                                                                 cm_node->cm_core,
 998                                                                 cm_node);
 999                                         }
1000                                 } else {
1001                                         struct nes_cm_event event;
1002
1003                                         event.cm_node = loopback;
1004                                         event.cm_info.rem_addr =
1005                                                         loopback->rem_addr;
1006                                         event.cm_info.loc_addr =
1007                                                         loopback->loc_addr;
1008                                         event.cm_info.rem_port =
1009                                                         loopback->rem_port;
1010                                         event.cm_info.loc_port =
1011                                                          loopback->loc_port;
1012                                         event.cm_info.cm_id = loopback->cm_id;
1013                                         cm_event_connect_error(&event);
1014                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1015                                         loopback->state = NES_CM_STATE_CLOSED;
1016
1017                                         rem_ref_cm_node(cm_node->cm_core,
1018                                                          cm_node);
1019
1020                                 }
1021                         }
1022                 }
1023         }
1024
1025         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1026         if (!atomic_dec_return(&listener->ref_count)) {
1027                 list_del(&listener->list);
1028
1029                 /* decrement our listen node count */
1030                 atomic_dec(&cm_core->listen_node_cnt);
1031
1032                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1033
1034                 if (listener->nesvnic) {
1035                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1036                                         PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1037                 }
1038
1039                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1040
1041                 kfree(listener);
1042                 listener = NULL;
1043                 ret = 0;
1044                 cm_listens_destroyed++;
1045         } else {
1046                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1047         }
1048         if (listener) {
1049                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1050                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1051                                         " with non-zero pending accepts=%u\n",
1052                                         listener, atomic_read(&listener->pend_accepts_cnt));
1053         }
1054
1055         return ret;
1056 }
1057
1058
1059 /**
1060  * mini_cm_del_listen
1061  */
1062 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1063                 struct nes_cm_listener *listener)
1064 {
1065         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1066         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1067         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1068 }
1069
1070
1071 /**
1072  * mini_cm_accelerated
1073  */
1074 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1075                 struct nes_cm_node *cm_node)
1076 {
1077         u32 was_timer_set;
1078         cm_node->accelerated = 1;
1079
1080         if (cm_node->accept_pend) {
1081                 BUG_ON(!cm_node->listener);
1082                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1083                 cm_node->accept_pend = 0;
1084                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1085         }
1086
1087         was_timer_set = timer_pending(&cm_core->tcp_timer);
1088         if (!was_timer_set) {
1089                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1090                 add_timer(&cm_core->tcp_timer);
1091         }
1092
1093         return 0;
1094 }
1095
1096
1097 /**
1098  * nes_addr_resolve_neigh
1099  */
1100 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1101 {
1102         struct rtable *rt;
1103         struct flowi fl;
1104         struct neighbour *neigh;
1105         int rc = -1;
1106
1107         memset(&fl, 0, sizeof fl);
1108         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1109         if (ip_route_output_key(&init_net, &rt, &fl)) {
1110                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1111                                 __func__, dst_ip);
1112                 return rc;
1113         }
1114
1115         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1116         if (neigh) {
1117                 if (neigh->nud_state & NUD_VALID) {
1118                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1119                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1120                                   neigh->ha, ntohl(rt->rt_gateway));
1121                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1122                                              dst_ip, NES_ARP_ADD);
1123                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1124                                            NES_ARP_RESOLVE);
1125                 }
1126                 neigh_release(neigh);
1127         }
1128
1129         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1130                 neigh_event_send(rt->u.dst.neighbour, NULL);
1131
1132         ip_rt_put(rt);
1133         return rc;
1134 }
1135
1136
1137 /**
1138  * make_cm_node - create a new instance of a cm node
1139  */
1140 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1141                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1142                 struct nes_cm_listener *listener)
1143 {
1144         struct nes_cm_node *cm_node;
1145         struct timespec ts;
1146         int arpindex = 0;
1147         struct nes_device *nesdev;
1148         struct nes_adapter *nesadapter;
1149
1150         /* create an hte and cm_node for this instance */
1151         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1152         if (!cm_node)
1153                 return NULL;
1154
1155         /* set our node specific transport info */
1156         cm_node->loc_addr = cm_info->loc_addr;
1157         cm_node->rem_addr = cm_info->rem_addr;
1158         cm_node->loc_port = cm_info->loc_port;
1159         cm_node->rem_port = cm_info->rem_port;
1160         cm_node->send_write0 = send_first;
1161         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1162                   &cm_node->loc_addr, cm_node->loc_port,
1163                   &cm_node->rem_addr, cm_node->rem_port);
1164         cm_node->listener = listener;
1165         cm_node->netdev = nesvnic->netdev;
1166         cm_node->cm_id = cm_info->cm_id;
1167         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1168
1169         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1170                         cm_node->cm_id);
1171
1172         spin_lock_init(&cm_node->retrans_list_lock);
1173
1174         cm_node->loopbackpartner = NULL;
1175         atomic_set(&cm_node->ref_count, 1);
1176         /* associate our parent CM core */
1177         cm_node->cm_core = cm_core;
1178         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1179         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1180         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1181                         NES_CM_DEFAULT_RCV_WND_SCALE;
1182         ts = current_kernel_time();
1183         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1184         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1185                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1186         cm_node->tcp_cntxt.rcv_nxt = 0;
1187         /* get a unique session ID , add thread_id to an upcounter to handle race */
1188         atomic_inc(&cm_core->node_cnt);
1189         cm_node->conn_type = cm_info->conn_type;
1190         cm_node->apbvt_set = 0;
1191         cm_node->accept_pend = 0;
1192
1193         cm_node->nesvnic = nesvnic;
1194         /* get some device handles, for arp lookup */
1195         nesdev = nesvnic->nesdev;
1196         nesadapter = nesdev->nesadapter;
1197
1198         cm_node->loopbackpartner = NULL;
1199         /* get the mac addr for the remote node */
1200         if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1201                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1202         else
1203                 arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1204         if (arpindex < 0) {
1205                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1206                 if (arpindex < 0) {
1207                         kfree(cm_node);
1208                         return NULL;
1209                 }
1210         }
1211
1212         /* copy the mac addr to node context */
1213         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1214         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1215                   cm_node->rem_mac);
1216
1217         add_hte_node(cm_core, cm_node);
1218         atomic_inc(&cm_nodes_created);
1219
1220         return cm_node;
1221 }
1222
1223
1224 /**
1225  * add_ref_cm_node - destroy an instance of a cm node
1226  */
1227 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1228 {
1229         atomic_inc(&cm_node->ref_count);
1230         return 0;
1231 }
1232
1233
1234 /**
1235  * rem_ref_cm_node - destroy an instance of a cm node
1236  */
1237 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1238         struct nes_cm_node *cm_node)
1239 {
1240         unsigned long flags;
1241         struct nes_qp *nesqp;
1242
1243         if (!cm_node)
1244                 return -EINVAL;
1245
1246         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1247         if (atomic_dec_return(&cm_node->ref_count)) {
1248                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1249                 return 0;
1250         }
1251         list_del(&cm_node->list);
1252         atomic_dec(&cm_core->ht_node_cnt);
1253         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1254
1255         /* if the node is destroyed before connection was accelerated */
1256         if (!cm_node->accelerated && cm_node->accept_pend) {
1257                 BUG_ON(!cm_node->listener);
1258                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1259                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1260         }
1261         WARN_ON(cm_node->send_entry);
1262         if (cm_node->recv_entry)
1263                 handle_recv_entry(cm_node, 0);
1264         if (cm_node->listener) {
1265                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1266         } else {
1267                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1268                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1269                                 PCI_FUNC(
1270                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1271                                 NES_MANAGE_APBVT_DEL);
1272                 }
1273         }
1274
1275         atomic_dec(&cm_core->node_cnt);
1276         atomic_inc(&cm_nodes_destroyed);
1277         nesqp = cm_node->nesqp;
1278         if (nesqp) {
1279                 nesqp->cm_node = NULL;
1280                 nes_rem_ref(&nesqp->ibqp);
1281                 cm_node->nesqp = NULL;
1282         }
1283
1284         kfree(cm_node);
1285         return 0;
1286 }
1287
1288 /**
1289  * process_options
1290  */
1291 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1292         u32 optionsize, u32 syn_packet)
1293 {
1294         u32 tmp;
1295         u32 offset = 0;
1296         union all_known_options *all_options;
1297         char got_mss_option = 0;
1298
1299         while (offset < optionsize) {
1300                 all_options = (union all_known_options *)(optionsloc + offset);
1301                 switch (all_options->as_base.optionnum) {
1302                 case OPTION_NUMBER_END:
1303                         offset = optionsize;
1304                         break;
1305                 case OPTION_NUMBER_NONE:
1306                         offset += 1;
1307                         continue;
1308                 case OPTION_NUMBER_MSS:
1309                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1310                                 "Size: %d\n", __func__,
1311                                 all_options->as_mss.length, offset, optionsize);
1312                         got_mss_option = 1;
1313                         if (all_options->as_mss.length != 4) {
1314                                 return 1;
1315                         } else {
1316                                 tmp = ntohs(all_options->as_mss.mss);
1317                                 if (tmp > 0 && tmp <
1318                                         cm_node->tcp_cntxt.mss)
1319                                         cm_node->tcp_cntxt.mss = tmp;
1320                         }
1321                         break;
1322                 case OPTION_NUMBER_WINDOW_SCALE:
1323                         cm_node->tcp_cntxt.snd_wscale =
1324                                 all_options->as_windowscale.shiftcount;
1325                         break;
1326                 case OPTION_NUMBER_WRITE0:
1327                         cm_node->send_write0 = 1;
1328                         break;
1329                 default:
1330                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1331                                 all_options->as_base.optionnum);
1332                         break;
1333                 }
1334                 offset += all_options->as_base.length;
1335         }
1336         if ((!got_mss_option) && (syn_packet))
1337                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1338         return 0;
1339 }
1340
1341 static void drop_packet(struct sk_buff *skb)
1342 {
1343         atomic_inc(&cm_accel_dropped_pkts);
1344         dev_kfree_skb_any(skb);
1345 }
1346
1347 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1348 {
1349         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1350                 "refcnt=%d\n", cm_node, cm_node->state,
1351                 atomic_read(&cm_node->ref_count));
1352         switch (cm_node->state) {
1353         case NES_CM_STATE_SYN_RCVD:
1354         case NES_CM_STATE_SYN_SENT:
1355         case NES_CM_STATE_ESTABLISHED:
1356         case NES_CM_STATE_MPAREQ_SENT:
1357         case NES_CM_STATE_MPAREJ_RCVD:
1358                 cm_node->tcp_cntxt.rcv_nxt++;
1359                 cleanup_retrans_entry(cm_node);
1360                 cm_node->state = NES_CM_STATE_LAST_ACK;
1361                 send_fin(cm_node, NULL);
1362                 break;
1363         case NES_CM_STATE_FIN_WAIT1:
1364                 cm_node->tcp_cntxt.rcv_nxt++;
1365                 cleanup_retrans_entry(cm_node);
1366                 cm_node->state = NES_CM_STATE_CLOSING;
1367                 send_ack(cm_node, NULL);
1368                 /* Wait for ACK as this is simultanous close..
1369                 * After we receive ACK, do not send anything..
1370                 * Just rm the node.. Done.. */
1371                 break;
1372         case NES_CM_STATE_FIN_WAIT2:
1373                 cm_node->tcp_cntxt.rcv_nxt++;
1374                 cleanup_retrans_entry(cm_node);
1375                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1376                 send_ack(cm_node, NULL);
1377                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1378                 break;
1379         case NES_CM_STATE_TIME_WAIT:
1380                 cm_node->tcp_cntxt.rcv_nxt++;
1381                 cleanup_retrans_entry(cm_node);
1382                 cm_node->state = NES_CM_STATE_CLOSED;
1383                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1384                 break;
1385         case NES_CM_STATE_TSA:
1386         default:
1387                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1388                         cm_node, cm_node->state);
1389                 break;
1390         }
1391 }
1392
1393
1394 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1395         struct tcphdr *tcph)
1396 {
1397
1398         int     reset = 0;      /* whether to send reset in case of err.. */
1399         int     passive_state;
1400         atomic_inc(&cm_resets_recvd);
1401         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1402                         " refcnt=%d\n", cm_node, cm_node->state,
1403                         atomic_read(&cm_node->ref_count));
1404         cleanup_retrans_entry(cm_node);
1405         switch (cm_node->state) {
1406         case NES_CM_STATE_SYN_SENT:
1407         case NES_CM_STATE_MPAREQ_SENT:
1408                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1409                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1410                         cm_node->listener, cm_node->state);
1411                 active_open_err(cm_node, skb, reset);
1412                 break;
1413         case NES_CM_STATE_MPAREQ_RCVD:
1414                 passive_state = atomic_add_return(1, &cm_node->passive_state);
1415                 if (passive_state ==  NES_SEND_RESET_EVENT)
1416                         create_event(cm_node, NES_CM_EVENT_RESET);
1417                 cm_node->state = NES_CM_STATE_CLOSED;
1418                 dev_kfree_skb_any(skb);
1419                 break;
1420         case NES_CM_STATE_ESTABLISHED:
1421         case NES_CM_STATE_SYN_RCVD:
1422         case NES_CM_STATE_LISTENING:
1423                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1424                 passive_open_err(cm_node, skb, reset);
1425                 break;
1426         case NES_CM_STATE_TSA:
1427                 active_open_err(cm_node, skb, reset);
1428                 break;
1429         case NES_CM_STATE_CLOSED:
1430                 drop_packet(skb);
1431                 break;
1432         case NES_CM_STATE_FIN_WAIT1:
1433         case NES_CM_STATE_LAST_ACK:
1434                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1435         case NES_CM_STATE_TIME_WAIT:
1436                 cm_node->state = NES_CM_STATE_CLOSED;
1437                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1438                 drop_packet(skb);
1439                 break;
1440         default:
1441                 drop_packet(skb);
1442                 break;
1443         }
1444 }
1445
1446
1447 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1448 {
1449
1450         int     ret = 0;
1451         int datasize = skb->len;
1452         u8 *dataloc = skb->data;
1453
1454         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1455         u32     res_type;
1456         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1457         if (ret) {
1458                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1459                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1460                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1461                                 "cm_node=%p listener=%p state=%d\n", __func__,
1462                                 __LINE__, cm_node, cm_node->listener,
1463                                 cm_node->state);
1464                         active_open_err(cm_node, skb, 1);
1465                 } else {
1466                         passive_open_err(cm_node, skb, 1);
1467                 }
1468                 return;
1469         }
1470
1471         switch (cm_node->state) {
1472         case NES_CM_STATE_ESTABLISHED:
1473                 if (res_type == NES_MPA_REQUEST_REJECT) {
1474                         /*BIG problem as we are receiving the MPA.. So should
1475                         * not be REJECT.. This is Passive Open.. We can
1476                         * only receive it Reject for Active Open...*/
1477                         WARN_ON(1);
1478                 }
1479                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1480                 type = NES_CM_EVENT_MPA_REQ;
1481                 atomic_set(&cm_node->passive_state,
1482                                 NES_PASSIVE_STATE_INDICATED);
1483                 break;
1484         case NES_CM_STATE_MPAREQ_SENT:
1485                 cleanup_retrans_entry(cm_node);
1486                 if (res_type == NES_MPA_REQUEST_REJECT) {
1487                         type = NES_CM_EVENT_MPA_REJECT;
1488                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1489                 } else {
1490                         type = NES_CM_EVENT_CONNECTED;
1491                         cm_node->state = NES_CM_STATE_TSA;
1492                 }
1493
1494                 break;
1495         default:
1496                 WARN_ON(1);
1497                 break;
1498         }
1499         dev_kfree_skb_any(skb);
1500         create_event(cm_node, type);
1501 }
1502
1503 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1504 {
1505         switch (cm_node->state) {
1506         case NES_CM_STATE_SYN_SENT:
1507         case NES_CM_STATE_MPAREQ_SENT:
1508                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1509                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1510                         cm_node->listener, cm_node->state);
1511                 active_open_err(cm_node, skb, 1);
1512                 break;
1513         case NES_CM_STATE_ESTABLISHED:
1514         case NES_CM_STATE_SYN_RCVD:
1515                 passive_open_err(cm_node, skb, 1);
1516                 break;
1517         case NES_CM_STATE_TSA:
1518         default:
1519                 drop_packet(skb);
1520         }
1521 }
1522
1523 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1524         struct sk_buff *skb)
1525 {
1526         int err;
1527
1528         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1529         if (err)
1530                 active_open_err(cm_node, skb, 1);
1531
1532         return err;
1533 }
1534
1535 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1536         struct sk_buff *skb)
1537 {
1538         int err = 0;
1539         u32 seq;
1540         u32 ack_seq;
1541         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1542         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1543         u32 rcv_wnd;
1544         seq = ntohl(tcph->seq);
1545         ack_seq = ntohl(tcph->ack_seq);
1546         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1547         if (ack_seq != loc_seq_num)
1548                 err = 1;
1549         else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1550                 err = 1;
1551         if (err) {
1552                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1553                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1554                         cm_node->listener, cm_node->state);
1555                 indicate_pkt_err(cm_node, skb);
1556                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1557                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1558                         rcv_wnd);
1559         }
1560         return err;
1561 }
1562
1563 /*
1564  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1565  * is created with a listener or it may comein as rexmitted packet which in
1566  * that case will be just dropped.
1567  */
1568
1569 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1570         struct tcphdr *tcph)
1571 {
1572         int ret;
1573         u32 inc_sequence;
1574         int optionsize;
1575
1576         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1577         skb_trim(skb, 0);
1578         inc_sequence = ntohl(tcph->seq);
1579
1580         switch (cm_node->state) {
1581         case NES_CM_STATE_SYN_SENT:
1582         case NES_CM_STATE_MPAREQ_SENT:
1583                 /* Rcvd syn on active open connection*/
1584                 active_open_err(cm_node, skb, 1);
1585                 break;
1586         case NES_CM_STATE_LISTENING:
1587                 /* Passive OPEN */
1588                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1589                                 cm_node->listener->backlog) {
1590                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1591                                 "pressure \n");
1592                         cm_backlog_drops++;
1593                         passive_open_err(cm_node, skb, 0);
1594                         break;
1595                 }
1596                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1597                         1);
1598                 if (ret) {
1599                         passive_open_err(cm_node, skb, 0);
1600                         /* drop pkt */
1601                         break;
1602                 }
1603                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1604                 BUG_ON(cm_node->send_entry);
1605                 cm_node->accept_pend = 1;
1606                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1607
1608                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1609                 send_syn(cm_node, 1, skb);
1610                 break;
1611         case NES_CM_STATE_CLOSED:
1612                 cleanup_retrans_entry(cm_node);
1613                 add_ref_cm_node(cm_node);
1614                 send_reset(cm_node, skb);
1615                 break;
1616         case NES_CM_STATE_TSA:
1617         case NES_CM_STATE_ESTABLISHED:
1618         case NES_CM_STATE_FIN_WAIT1:
1619         case NES_CM_STATE_FIN_WAIT2:
1620         case NES_CM_STATE_MPAREQ_RCVD:
1621         case NES_CM_STATE_LAST_ACK:
1622         case NES_CM_STATE_CLOSING:
1623         case NES_CM_STATE_UNKNOWN:
1624         default:
1625                 drop_packet(skb);
1626                 break;
1627         }
1628 }
1629
1630 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1631         struct tcphdr *tcph)
1632 {
1633
1634         int ret;
1635         u32 inc_sequence;
1636         int optionsize;
1637
1638         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1639         skb_trim(skb, 0);
1640         inc_sequence = ntohl(tcph->seq);
1641         switch (cm_node->state) {
1642         case NES_CM_STATE_SYN_SENT:
1643                 cleanup_retrans_entry(cm_node);
1644                 /* active open */
1645                 if (check_syn(cm_node, tcph, skb))
1646                         return;
1647                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1648                 /* setup options */
1649                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1650                 if (ret) {
1651                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1652                                 cm_node);
1653                         break;
1654                 }
1655                 cleanup_retrans_entry(cm_node);
1656                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1657                 send_mpa_request(cm_node, skb);
1658                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1659                 break;
1660         case NES_CM_STATE_MPAREQ_RCVD:
1661                 /* passive open, so should not be here */
1662                 passive_open_err(cm_node, skb, 1);
1663                 break;
1664         case NES_CM_STATE_LISTENING:
1665                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1666                 cleanup_retrans_entry(cm_node);
1667                 cm_node->state = NES_CM_STATE_CLOSED;
1668                 send_reset(cm_node, skb);
1669                 break;
1670         case NES_CM_STATE_CLOSED:
1671                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1672                 cleanup_retrans_entry(cm_node);
1673                 add_ref_cm_node(cm_node);
1674                 send_reset(cm_node, skb);
1675                 break;
1676         case NES_CM_STATE_ESTABLISHED:
1677         case NES_CM_STATE_FIN_WAIT1:
1678         case NES_CM_STATE_FIN_WAIT2:
1679         case NES_CM_STATE_LAST_ACK:
1680         case NES_CM_STATE_TSA:
1681         case NES_CM_STATE_CLOSING:
1682         case NES_CM_STATE_UNKNOWN:
1683         case NES_CM_STATE_MPAREQ_SENT:
1684         default:
1685                 drop_packet(skb);
1686                 break;
1687         }
1688 }
1689
1690 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1691         struct tcphdr *tcph)
1692 {
1693         int datasize = 0;
1694         u32 inc_sequence;
1695         u32 rem_seq_ack;
1696         u32 rem_seq;
1697         int ret = 0;
1698         int optionsize;
1699         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1700
1701         if (check_seq(cm_node, tcph, skb))
1702                 return -EINVAL;
1703
1704         skb_pull(skb, tcph->doff << 2);
1705         inc_sequence = ntohl(tcph->seq);
1706         rem_seq = ntohl(tcph->seq);
1707         rem_seq_ack =  ntohl(tcph->ack_seq);
1708         datasize = skb->len;
1709         switch (cm_node->state) {
1710         case NES_CM_STATE_SYN_RCVD:
1711                 /* Passive OPEN */
1712                 cleanup_retrans_entry(cm_node);
1713                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1714                 if (ret)
1715                         break;
1716                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1717                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1718                 if (datasize) {
1719                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1720                         handle_rcv_mpa(cm_node, skb);
1721                 } else  /* rcvd ACK only */
1722                         dev_kfree_skb_any(skb);
1723                 break;
1724         case NES_CM_STATE_ESTABLISHED:
1725                 /* Passive OPEN */
1726                 cleanup_retrans_entry(cm_node);
1727                 if (datasize) {
1728                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1729                         handle_rcv_mpa(cm_node, skb);
1730                 } else
1731                         drop_packet(skb);
1732                 break;
1733         case NES_CM_STATE_MPAREQ_SENT:
1734                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1735                 if (datasize) {
1736                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1737                         handle_rcv_mpa(cm_node, skb);
1738                 } else  /* Could be just an ack pkt.. */
1739                         dev_kfree_skb_any(skb);
1740                 break;
1741         case NES_CM_STATE_LISTENING:
1742                 cleanup_retrans_entry(cm_node);
1743                 cm_node->state = NES_CM_STATE_CLOSED;
1744                 send_reset(cm_node, skb);
1745                 break;
1746         case NES_CM_STATE_CLOSED:
1747                 cleanup_retrans_entry(cm_node);
1748                 add_ref_cm_node(cm_node);
1749                 send_reset(cm_node, skb);
1750                 break;
1751         case NES_CM_STATE_LAST_ACK:
1752         case NES_CM_STATE_CLOSING:
1753                 cleanup_retrans_entry(cm_node);
1754                 cm_node->state = NES_CM_STATE_CLOSED;
1755                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1756                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1757                 drop_packet(skb);
1758                 break;
1759         case NES_CM_STATE_FIN_WAIT1:
1760                 cleanup_retrans_entry(cm_node);
1761                 drop_packet(skb);
1762                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1763                 break;
1764         case NES_CM_STATE_SYN_SENT:
1765         case NES_CM_STATE_FIN_WAIT2:
1766         case NES_CM_STATE_TSA:
1767         case NES_CM_STATE_MPAREQ_RCVD:
1768         case NES_CM_STATE_UNKNOWN:
1769         default:
1770                 cleanup_retrans_entry(cm_node);
1771                 drop_packet(skb);
1772                 break;
1773         }
1774         return ret;
1775 }
1776
1777
1778
1779 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1780         struct sk_buff *skb, int optionsize, int passive)
1781 {
1782         u8 *optionsloc = (u8 *)&tcph[1];
1783         if (optionsize) {
1784                 if (process_options(cm_node, optionsloc, optionsize,
1785                         (u32)tcph->syn)) {
1786                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1787                                 __func__, cm_node);
1788                         if (passive)
1789                                 passive_open_err(cm_node, skb, 1);
1790                         else
1791                                 active_open_err(cm_node, skb, 1);
1792                         return 1;
1793                 }
1794         }
1795
1796         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1797                         cm_node->tcp_cntxt.snd_wscale;
1798
1799         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1800                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1801         return 0;
1802 }
1803
1804 /*
1805  * active_open_err() will send reset() if flag set..
1806  * It will also send ABORT event.
1807  */
1808
1809 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1810         int reset)
1811 {
1812         cleanup_retrans_entry(cm_node);
1813         if (reset) {
1814                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1815                                 "state=%d\n", cm_node, cm_node->state);
1816                 add_ref_cm_node(cm_node);
1817                 send_reset(cm_node, skb);
1818         } else
1819                 dev_kfree_skb_any(skb);
1820
1821         cm_node->state = NES_CM_STATE_CLOSED;
1822         create_event(cm_node, NES_CM_EVENT_ABORTED);
1823 }
1824
1825 /*
1826  * passive_open_err() will either do a reset() or will free up the skb and
1827  * remove the cm_node.
1828  */
1829
1830 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1831         int reset)
1832 {
1833         cleanup_retrans_entry(cm_node);
1834         cm_node->state = NES_CM_STATE_CLOSED;
1835         if (reset) {
1836                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1837                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1838                 send_reset(cm_node, skb);
1839         } else {
1840                 dev_kfree_skb_any(skb);
1841                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1842         }
1843 }
1844
1845 /*
1846  * free_retrans_entry() routines assumes that the retrans_list_lock has
1847  * been acquired before calling.
1848  */
1849 static void free_retrans_entry(struct nes_cm_node *cm_node)
1850 {
1851         struct nes_timer_entry *send_entry;
1852         send_entry = cm_node->send_entry;
1853         if (send_entry) {
1854                 cm_node->send_entry = NULL;
1855                 dev_kfree_skb_any(send_entry->skb);
1856                 kfree(send_entry);
1857                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1858         }
1859 }
1860
1861 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1862 {
1863         unsigned long flags;
1864
1865         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1866         free_retrans_entry(cm_node);
1867         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1868 }
1869
1870 /**
1871  * process_packet
1872  * Returns skb if to be freed, else it will return NULL if already used..
1873  */
1874 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1875         struct nes_cm_core *cm_core)
1876 {
1877         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1878         struct tcphdr *tcph = tcp_hdr(skb);
1879         u32     fin_set = 0;
1880         int ret = 0;
1881         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1882
1883         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1884                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1885                 tcph->ack, tcph->rst, tcph->fin);
1886
1887         if (tcph->rst)
1888                 pkt_type = NES_PKT_TYPE_RST;
1889         else if (tcph->syn) {
1890                 pkt_type = NES_PKT_TYPE_SYN;
1891                 if (tcph->ack)
1892                         pkt_type = NES_PKT_TYPE_SYNACK;
1893         } else if (tcph->ack)
1894                 pkt_type = NES_PKT_TYPE_ACK;
1895         if (tcph->fin)
1896                 fin_set = 1;
1897
1898         switch (pkt_type) {
1899         case NES_PKT_TYPE_SYN:
1900                 handle_syn_pkt(cm_node, skb, tcph);
1901                 break;
1902         case NES_PKT_TYPE_SYNACK:
1903                 handle_synack_pkt(cm_node, skb, tcph);
1904                 break;
1905         case NES_PKT_TYPE_ACK:
1906                 ret = handle_ack_pkt(cm_node, skb, tcph);
1907                 if (fin_set && !ret)
1908                         handle_fin_pkt(cm_node);
1909                 break;
1910         case NES_PKT_TYPE_RST:
1911                 handle_rst_pkt(cm_node, skb, tcph);
1912                 break;
1913         default:
1914                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1915                         handle_fin_pkt(cm_node);
1916                 drop_packet(skb);
1917                 break;
1918         }
1919 }
1920
1921 /**
1922  * mini_cm_listen - create a listen node with params
1923  */
1924 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1925         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1926 {
1927         struct nes_cm_listener *listener;
1928         unsigned long flags;
1929
1930         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1931                 cm_info->loc_addr, cm_info->loc_port);
1932
1933         /* cannot have multiple matching listeners */
1934         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1935                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1936         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1937                 /* find automatically incs ref count ??? */
1938                 atomic_dec(&listener->ref_count);
1939                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1940                 return NULL;
1941         }
1942
1943         if (!listener) {
1944                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1945                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1946                 if (!listener) {
1947                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1948                         return NULL;
1949                 }
1950
1951                 listener->loc_addr = htonl(cm_info->loc_addr);
1952                 listener->loc_port = htons(cm_info->loc_port);
1953                 listener->reused_node = 0;
1954
1955                 atomic_set(&listener->ref_count, 1);
1956         }
1957         /* pasive case */
1958         /* find already inc'ed the ref count */
1959         else {
1960                 listener->reused_node = 1;
1961         }
1962
1963         listener->cm_id = cm_info->cm_id;
1964         atomic_set(&listener->pend_accepts_cnt, 0);
1965         listener->cm_core = cm_core;
1966         listener->nesvnic = nesvnic;
1967         atomic_inc(&cm_core->node_cnt);
1968
1969         listener->conn_type = cm_info->conn_type;
1970         listener->backlog = cm_info->backlog;
1971         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1972
1973         if (!listener->reused_node) {
1974                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1975                 list_add(&listener->list, &cm_core->listen_list.list);
1976                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1977                 atomic_inc(&cm_core->listen_node_cnt);
1978         }
1979
1980         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1981                         " listener = %p, backlog = %d, cm_id = %p.\n",
1982                         cm_info->loc_addr, cm_info->loc_port,
1983                         listener, listener->backlog, listener->cm_id);
1984
1985         return listener;
1986 }
1987
1988
1989 /**
1990  * mini_cm_connect - make a connection node with params
1991  */
1992 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1993         struct nes_vnic *nesvnic, u16 private_data_len,
1994         void *private_data, struct nes_cm_info *cm_info)
1995 {
1996         int ret = 0;
1997         struct nes_cm_node *cm_node;
1998         struct nes_cm_listener *loopbackremotelistener;
1999         struct nes_cm_node *loopbackremotenode;
2000         struct nes_cm_info loopback_cm_info;
2001         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2002         struct ietf_mpa_frame *mpa_frame = NULL;
2003
2004         /* create a CM connection node */
2005         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2006         if (!cm_node)
2007                 return NULL;
2008         mpa_frame = &cm_node->mpa_frame;
2009         memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2010         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2011         mpa_frame->rev =  IETF_MPA_VERSION;
2012         mpa_frame->priv_data_len = htons(private_data_len);
2013
2014         /* set our node side to client (active) side */
2015         cm_node->tcp_cntxt.client = 1;
2016         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2017
2018         if (cm_info->loc_addr == cm_info->rem_addr) {
2019                 loopbackremotelistener = find_listener(cm_core,
2020                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2021                                 NES_CM_LISTENER_ACTIVE_STATE);
2022                 if (loopbackremotelistener == NULL) {
2023                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2024                 } else {
2025                         loopback_cm_info = *cm_info;
2026                         loopback_cm_info.loc_port = cm_info->rem_port;
2027                         loopback_cm_info.rem_port = cm_info->loc_port;
2028                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2029                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2030                                 &loopback_cm_info, loopbackremotelistener);
2031                         if (!loopbackremotenode) {
2032                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2033                                 return NULL;
2034                         }
2035                         atomic_inc(&cm_loopbacks);
2036                         loopbackremotenode->loopbackpartner = cm_node;
2037                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2038                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2039                         cm_node->loopbackpartner = loopbackremotenode;
2040                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2041                                 private_data_len);
2042                         loopbackremotenode->mpa_frame_size = private_data_len;
2043
2044                         /* we are done handling this state. */
2045                         /* set node to a TSA state */
2046                         cm_node->state = NES_CM_STATE_TSA;
2047                         cm_node->tcp_cntxt.rcv_nxt =
2048                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2049                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2050                                 cm_node->tcp_cntxt.loc_seq_num;
2051                         cm_node->tcp_cntxt.max_snd_wnd =
2052                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2053                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2054                                 cm_node->tcp_cntxt.rcv_wnd;
2055                         cm_node->tcp_cntxt.snd_wnd =
2056                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2057                         loopbackremotenode->tcp_cntxt.snd_wnd =
2058                                 cm_node->tcp_cntxt.rcv_wnd;
2059                         cm_node->tcp_cntxt.snd_wscale =
2060                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2061                         loopbackremotenode->tcp_cntxt.snd_wscale =
2062                                 cm_node->tcp_cntxt.rcv_wscale;
2063                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2064                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2065                 }
2066                 return cm_node;
2067         }
2068
2069         /* set our node side to client (active) side */
2070         cm_node->tcp_cntxt.client = 1;
2071         /* init our MPA frame ptr */
2072         memcpy(mpa_frame->priv_data, private_data, private_data_len);
2073
2074         cm_node->mpa_frame_size = mpa_frame_size;
2075
2076         /* send a syn and goto syn sent state */
2077         cm_node->state = NES_CM_STATE_SYN_SENT;
2078         ret = send_syn(cm_node, 0, NULL);
2079
2080         if (ret) {
2081                 /* error in sending the syn free up the cm_node struct */
2082                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2083                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2084                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2085                         cm_node->cm_id);
2086                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2087                 cm_node = NULL;
2088         }
2089
2090         if (cm_node)
2091                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2092                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2093                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2094                         cm_node->cm_id);
2095
2096         return cm_node;
2097 }
2098
2099
2100 /**
2101  * mini_cm_accept - accept a connection
2102  * This function is never called
2103  */
2104 static int mini_cm_accept(struct nes_cm_core *cm_core,
2105         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2106 {
2107         return 0;
2108 }
2109
2110
2111 /**
2112  * mini_cm_reject - reject and teardown a connection
2113  */
2114 static int mini_cm_reject(struct nes_cm_core *cm_core,
2115         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2116 {
2117         int ret = 0;
2118         int err = 0;
2119         int passive_state;
2120         struct nes_cm_event event;
2121         struct iw_cm_id *cm_id = cm_node->cm_id;
2122         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2123
2124         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2125                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2126
2127         if (cm_node->tcp_cntxt.client)
2128                 return ret;
2129         cleanup_retrans_entry(cm_node);
2130
2131         if (!loopback) {
2132                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2133                 if (passive_state == NES_SEND_RESET_EVENT) {
2134                         cm_node->state = NES_CM_STATE_CLOSED;
2135                         rem_ref_cm_node(cm_core, cm_node);
2136                 } else {
2137                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2138                                 rem_ref_cm_node(cm_core, cm_node);
2139                         } else {
2140                                 ret = send_mpa_reject(cm_node);
2141                                 if (ret) {
2142                                         cm_node->state = NES_CM_STATE_CLOSED;
2143                                         err = send_reset(cm_node, NULL);
2144                                         if (err)
2145                                                 WARN_ON(1);
2146                                 } else
2147                                         cm_id->add_ref(cm_id);
2148                         }
2149                 }
2150         } else {
2151                 cm_node->cm_id = NULL;
2152                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2153                         rem_ref_cm_node(cm_core, cm_node);
2154                         rem_ref_cm_node(cm_core, loopback);
2155                 } else {
2156                         event.cm_node = loopback;
2157                         event.cm_info.rem_addr = loopback->rem_addr;
2158                         event.cm_info.loc_addr = loopback->loc_addr;
2159                         event.cm_info.rem_port = loopback->rem_port;
2160                         event.cm_info.loc_port = loopback->loc_port;
2161                         event.cm_info.cm_id = loopback->cm_id;
2162                         cm_event_mpa_reject(&event);
2163                         rem_ref_cm_node(cm_core, cm_node);
2164                         loopback->state = NES_CM_STATE_CLOSING;
2165
2166                         cm_id = loopback->cm_id;
2167                         rem_ref_cm_node(cm_core, loopback);
2168                         cm_id->rem_ref(cm_id);
2169                 }
2170         }
2171
2172         return ret;
2173 }
2174
2175
2176 /**
2177  * mini_cm_close
2178  */
2179 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2180 {
2181         int ret = 0;
2182
2183         if (!cm_core || !cm_node)
2184                 return -EINVAL;
2185
2186         switch (cm_node->state) {
2187         case NES_CM_STATE_SYN_RCVD:
2188         case NES_CM_STATE_SYN_SENT:
2189         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2190         case NES_CM_STATE_ESTABLISHED:
2191         case NES_CM_STATE_ACCEPTING:
2192         case NES_CM_STATE_MPAREQ_SENT:
2193         case NES_CM_STATE_MPAREQ_RCVD:
2194                 cleanup_retrans_entry(cm_node);
2195                 send_reset(cm_node, NULL);
2196                 break;
2197         case NES_CM_STATE_CLOSE_WAIT:
2198                 cm_node->state = NES_CM_STATE_LAST_ACK;
2199                 send_fin(cm_node, NULL);
2200                 break;
2201         case NES_CM_STATE_FIN_WAIT1:
2202         case NES_CM_STATE_FIN_WAIT2:
2203         case NES_CM_STATE_LAST_ACK:
2204         case NES_CM_STATE_TIME_WAIT:
2205         case NES_CM_STATE_CLOSING:
2206                 ret = -1;
2207                 break;
2208         case NES_CM_STATE_LISTENING:
2209                 cleanup_retrans_entry(cm_node);
2210                 send_reset(cm_node, NULL);
2211                 break;
2212         case NES_CM_STATE_MPAREJ_RCVD:
2213         case NES_CM_STATE_UNKNOWN:
2214         case NES_CM_STATE_INITED:
2215         case NES_CM_STATE_CLOSED:
2216         case NES_CM_STATE_LISTENER_DESTROYED:
2217                 ret = rem_ref_cm_node(cm_core, cm_node);
2218                 break;
2219         case NES_CM_STATE_TSA:
2220                 if (cm_node->send_entry)
2221                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2222                                 "send_entry=%p\n", cm_node->send_entry);
2223                 ret = rem_ref_cm_node(cm_core, cm_node);
2224                 break;
2225         }
2226         return ret;
2227 }
2228
2229
2230 /**
2231  * recv_pkt - recv an ETHERNET packet, and process it through CM
2232  * node state machine
2233  */
2234 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2235         struct nes_vnic *nesvnic, struct sk_buff *skb)
2236 {
2237         struct nes_cm_node *cm_node = NULL;
2238         struct nes_cm_listener *listener = NULL;
2239         struct iphdr *iph;
2240         struct tcphdr *tcph;
2241         struct nes_cm_info nfo;
2242         int skb_handled = 1;
2243         __be32 tmp_daddr, tmp_saddr;
2244
2245         if (!skb)
2246                 return 0;
2247         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2248                 return 0;
2249         }
2250
2251         iph = (struct iphdr *)skb->data;
2252         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2253
2254         nfo.loc_addr = ntohl(iph->daddr);
2255         nfo.loc_port = ntohs(tcph->dest);
2256         nfo.rem_addr = ntohl(iph->saddr);
2257         nfo.rem_port = ntohs(tcph->source);
2258
2259         tmp_daddr = cpu_to_be32(iph->daddr);
2260         tmp_saddr = cpu_to_be32(iph->saddr);
2261
2262         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2263                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2264
2265         do {
2266                 cm_node = find_node(cm_core,
2267                         nfo.rem_port, nfo.rem_addr,
2268                         nfo.loc_port, nfo.loc_addr);
2269
2270                 if (!cm_node) {
2271                         /* Only type of packet accepted are for */
2272                         /* the PASSIVE open (syn only) */
2273                         if ((!tcph->syn) || (tcph->ack)) {
2274                                 skb_handled = 0;
2275                                 break;
2276                         }
2277                         listener = find_listener(cm_core, nfo.loc_addr,
2278                                 nfo.loc_port,
2279                                 NES_CM_LISTENER_ACTIVE_STATE);
2280                         if (!listener) {
2281                                 nfo.cm_id = NULL;
2282                                 nfo.conn_type = 0;
2283                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2284                                 skb_handled = 0;
2285                                 break;
2286                         }
2287                         nfo.cm_id = listener->cm_id;
2288                         nfo.conn_type = listener->conn_type;
2289                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2290                                 listener);
2291                         if (!cm_node) {
2292                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2293                                         "node\n");
2294                                 cm_packets_dropped++;
2295                                 atomic_dec(&listener->ref_count);
2296                                 dev_kfree_skb_any(skb);
2297                                 break;
2298                         }
2299                         if (!tcph->rst && !tcph->fin) {
2300                                 cm_node->state = NES_CM_STATE_LISTENING;
2301                         } else {
2302                                 cm_packets_dropped++;
2303                                 rem_ref_cm_node(cm_core, cm_node);
2304                                 dev_kfree_skb_any(skb);
2305                                 break;
2306                         }
2307                         add_ref_cm_node(cm_node);
2308                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2309                         rem_ref_cm_node(cm_core, cm_node);
2310                         atomic_inc(&cm_accel_dropped_pkts);
2311                         dev_kfree_skb_any(skb);
2312                         break;
2313                 }
2314                 skb_reset_network_header(skb);
2315                 skb_set_transport_header(skb, sizeof(*tcph));
2316                 skb->len = ntohs(iph->tot_len);
2317                 process_packet(cm_node, skb, cm_core);
2318                 rem_ref_cm_node(cm_core, cm_node);
2319         } while (0);
2320         return skb_handled;
2321 }
2322
2323
2324 /**
2325  * nes_cm_alloc_core - allocate a top level instance of a cm core
2326  */
2327 static struct nes_cm_core *nes_cm_alloc_core(void)
2328 {
2329         struct nes_cm_core *cm_core;
2330
2331         /* setup the CM core */
2332         /* alloc top level core control structure */
2333         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2334         if (!cm_core)
2335                 return NULL;
2336
2337         INIT_LIST_HEAD(&cm_core->connected_nodes);
2338         init_timer(&cm_core->tcp_timer);
2339         cm_core->tcp_timer.function = nes_cm_timer_tick;
2340
2341         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2342         cm_core->state = NES_CM_STATE_INITED;
2343         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2344
2345         atomic_set(&cm_core->events_posted, 0);
2346
2347         cm_core->api = &nes_cm_api;
2348
2349         spin_lock_init(&cm_core->ht_lock);
2350         spin_lock_init(&cm_core->listen_list_lock);
2351
2352         INIT_LIST_HEAD(&cm_core->listen_list.list);
2353
2354         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2355
2356         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2357         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2358         cm_core->post_event = nes_cm_post_event;
2359         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2360         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2361
2362         print_core(cm_core);
2363         return cm_core;
2364 }
2365
2366
2367 /**
2368  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2369  */
2370 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2371 {
2372         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2373
2374         if (!cm_core)
2375                 return -EINVAL;
2376
2377         barrier();
2378
2379         if (timer_pending(&cm_core->tcp_timer)) {
2380                 del_timer(&cm_core->tcp_timer);
2381         }
2382
2383         destroy_workqueue(cm_core->event_wq);
2384         destroy_workqueue(cm_core->disconn_wq);
2385         nes_debug(NES_DBG_CM, "\n");
2386         kfree(cm_core);
2387
2388         return 0;
2389 }
2390
2391
2392 /**
2393  * mini_cm_get
2394  */
2395 static int mini_cm_get(struct nes_cm_core *cm_core)
2396 {
2397         return cm_core->state;
2398 }
2399
2400
2401 /**
2402  * mini_cm_set
2403  */
2404 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2405 {
2406         int ret = 0;
2407
2408         switch (type) {
2409         case NES_CM_SET_PKT_SIZE:
2410                 cm_core->mtu = value;
2411                 break;
2412         case NES_CM_SET_FREE_PKT_Q_SIZE:
2413                 cm_core->free_tx_pkt_max = value;
2414                 break;
2415         default:
2416                 /* unknown set option */
2417                 ret = -EINVAL;
2418         }
2419
2420         return ret;
2421 }
2422
2423
2424 /**
2425  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2426  * successfully exchanged when this is called
2427  */
2428 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2429 {
2430         int ret = 0;
2431
2432         if (!nesqp)
2433                 return -EINVAL;
2434
2435         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2436                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2437                         NES_QPCONTEXT_MISC_DROS);
2438
2439         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2440                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2441
2442         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2443
2444         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2445
2446         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2447                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2448
2449         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2450                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2451                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2452
2453         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2454                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2455                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2456
2457         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2458         nesqp->nesqp_context->ts_recent = 0;
2459         nesqp->nesqp_context->ts_age = 0;
2460         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2461         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2462         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2463         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2464                         cm_node->tcp_cntxt.rcv_wscale);
2465         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2466         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2467         nesqp->nesqp_context->srtt = 0;
2468         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2469         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2470         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2471         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2472         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2473         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2474
2475         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2476                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2477                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2478                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2479                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2480                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2481                         le32_to_cpu(nesqp->nesqp_context->misc));
2482         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2483         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2484         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2485
2486         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2487         cm_node->state = NES_CM_STATE_TSA;
2488
2489         return ret;
2490 }
2491
2492
2493 /**
2494  * nes_cm_disconn
2495  */
2496 int nes_cm_disconn(struct nes_qp *nesqp)
2497 {
2498         struct disconn_work *work;
2499
2500         work = kzalloc(sizeof *work, GFP_ATOMIC);
2501         if (!work)
2502                 return -ENOMEM; /* Timer will clean up */
2503
2504         nes_add_ref(&nesqp->ibqp);
2505         work->nesqp = nesqp;
2506         INIT_WORK(&work->work, nes_disconnect_worker);
2507         queue_work(g_cm_core->disconn_wq, &work->work);
2508         return 0;
2509 }
2510
2511
2512 /**
2513  * nes_disconnect_worker
2514  */
2515 static void nes_disconnect_worker(struct work_struct *work)
2516 {
2517         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2518         struct nes_qp *nesqp = dwork->nesqp;
2519
2520         kfree(dwork);
2521         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2522                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2523         nes_cm_disconn_true(nesqp);
2524         nes_rem_ref(&nesqp->ibqp);
2525 }
2526
2527
2528 /**
2529  * nes_cm_disconn_true
2530  */
2531 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2532 {
2533         unsigned long flags;
2534         int ret = 0;
2535         struct iw_cm_id *cm_id;
2536         struct iw_cm_event cm_event;
2537         struct nes_vnic *nesvnic;
2538         u16 last_ae;
2539         u8 original_hw_tcp_state;
2540         u8 original_ibqp_state;
2541         enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2542         int issue_disconn = 0;
2543         int issue_close = 0;
2544         int issue_flush = 0;
2545         u32 flush_q = NES_CQP_FLUSH_RQ;
2546         struct ib_event ibevent;
2547
2548         if (!nesqp) {
2549                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2550                 return -1;
2551         }
2552
2553         spin_lock_irqsave(&nesqp->lock, flags);
2554         cm_id = nesqp->cm_id;
2555         /* make sure we havent already closed this connection */
2556         if (!cm_id) {
2557                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2558                                 nesqp->hwqp.qp_id);
2559                 spin_unlock_irqrestore(&nesqp->lock, flags);
2560                 return -1;
2561         }
2562
2563         nesvnic = to_nesvnic(nesqp->ibqp.device);
2564         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2565
2566         original_hw_tcp_state = nesqp->hw_tcp_state;
2567         original_ibqp_state   = nesqp->ibqp_state;
2568         last_ae = nesqp->last_aeq;
2569
2570         if (nesqp->term_flags) {
2571                 issue_disconn = 1;
2572                 issue_close = 1;
2573                 nesqp->cm_id = NULL;
2574                 if (nesqp->flush_issued == 0) {
2575                         nesqp->flush_issued = 1;
2576                         issue_flush = 1;
2577                 }
2578         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2579                         ((original_ibqp_state == IB_QPS_RTS) &&
2580                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2581                 issue_disconn = 1;
2582                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2583                         disconn_status = IW_CM_EVENT_STATUS_RESET;
2584         }
2585
2586         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2587                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2588                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2589                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2590                 issue_close = 1;
2591                 nesqp->cm_id = NULL;
2592                 if (nesqp->flush_issued == 0) {
2593                         nesqp->flush_issued = 1;
2594                         issue_flush = 1;
2595                 }
2596         }
2597
2598         spin_unlock_irqrestore(&nesqp->lock, flags);
2599
2600         if ((issue_flush) && (nesqp->destroyed == 0)) {
2601                 /* Flush the queue(s) */
2602                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2603                         flush_q |= NES_CQP_FLUSH_SQ;
2604                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2605
2606                 if (nesqp->term_flags) {
2607                         ibevent.device = nesqp->ibqp.device;
2608                         ibevent.event = nesqp->terminate_eventtype;
2609                         ibevent.element.qp = &nesqp->ibqp;
2610                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2611                 }
2612         }
2613
2614         if ((cm_id) && (cm_id->event_handler)) {
2615                 if (issue_disconn) {
2616                         atomic_inc(&cm_disconnects);
2617                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2618                         cm_event.status = disconn_status;
2619                         cm_event.local_addr = cm_id->local_addr;
2620                         cm_event.remote_addr = cm_id->remote_addr;
2621                         cm_event.private_data = NULL;
2622                         cm_event.private_data_len = 0;
2623
2624                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2625                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2626                                 "cm_id = %p, refcount = %u.\n",
2627                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2628                                 nesqp->hwqp.sq_tail, cm_id,
2629                                 atomic_read(&nesqp->refcount));
2630
2631                         ret = cm_id->event_handler(cm_id, &cm_event);
2632                         if (ret)
2633                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2634                                         "returned, ret=%d\n", ret);
2635                 }
2636
2637                 if (issue_close) {
2638                         atomic_inc(&cm_closes);
2639                         nes_disconnect(nesqp, 1);
2640
2641                         cm_id->provider_data = nesqp;
2642                         /* Send up the close complete event */
2643                         cm_event.event = IW_CM_EVENT_CLOSE;
2644                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2645                         cm_event.provider_data = cm_id->provider_data;
2646                         cm_event.local_addr = cm_id->local_addr;
2647                         cm_event.remote_addr = cm_id->remote_addr;
2648                         cm_event.private_data = NULL;
2649                         cm_event.private_data_len = 0;
2650
2651                         ret = cm_id->event_handler(cm_id, &cm_event);
2652                         if (ret) {
2653                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2654                         }
2655
2656                         cm_id->rem_ref(cm_id);
2657                 }
2658         }
2659
2660         return 0;
2661 }
2662
2663
2664 /**
2665  * nes_disconnect
2666  */
2667 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2668 {
2669         int ret = 0;
2670         struct nes_vnic *nesvnic;
2671         struct nes_device *nesdev;
2672         struct nes_ib_device *nesibdev;
2673
2674         nesvnic = to_nesvnic(nesqp->ibqp.device);
2675         if (!nesvnic)
2676                 return -EINVAL;
2677
2678         nesdev = nesvnic->nesdev;
2679         nesibdev = nesvnic->nesibdev;
2680
2681         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2682                         atomic_read(&nesvnic->netdev->refcnt));
2683
2684         if (nesqp->active_conn) {
2685
2686                 /* indicate this connection is NOT active */
2687                 nesqp->active_conn = 0;
2688         } else {
2689                 /* Need to free the Last Streaming Mode Message */
2690                 if (nesqp->ietf_frame) {
2691                         if (nesqp->lsmm_mr)
2692                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2693                         pci_free_consistent(nesdev->pcidev,
2694                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2695                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2696                 }
2697         }
2698
2699         /* close the CM node down if it is still active */
2700         if (nesqp->cm_node) {
2701                 nes_debug(NES_DBG_CM, "Call close API\n");
2702
2703                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2704         }
2705
2706         return ret;
2707 }
2708
2709
2710 /**
2711  * nes_accept
2712  */
2713 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2714 {
2715         u64 u64temp;
2716         struct ib_qp *ibqp;
2717         struct nes_qp *nesqp;
2718         struct nes_vnic *nesvnic;
2719         struct nes_device *nesdev;
2720         struct nes_cm_node *cm_node;
2721         struct nes_adapter *adapter;
2722         struct ib_qp_attr attr;
2723         struct iw_cm_event cm_event;
2724         struct nes_hw_qp_wqe *wqe;
2725         struct nes_v4_quad nes_quad;
2726         u32 crc_value;
2727         int ret;
2728         int passive_state;
2729         struct nes_ib_device *nesibdev;
2730         struct ib_mr *ibmr = NULL;
2731         struct ib_phys_buf ibphysbuf;
2732         struct nes_pd *nespd;
2733         u64 tagged_offset;
2734
2735         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2736         if (!ibqp)
2737                 return -EINVAL;
2738
2739         /* get all our handles */
2740         nesqp = to_nesqp(ibqp);
2741         nesvnic = to_nesvnic(nesqp->ibqp.device);
2742         nesdev = nesvnic->nesdev;
2743         adapter = nesdev->nesadapter;
2744
2745         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2746         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2747                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2748                 nesvnic->netdev->name);
2749
2750         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2751                 if (cm_node->loopbackpartner)
2752                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2753                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2754                 return -EINVAL;
2755         }
2756
2757         /* associate the node with the QP */
2758         nesqp->cm_node = (void *)cm_node;
2759         cm_node->nesqp = nesqp;
2760
2761         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2762                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2763         atomic_inc(&cm_accepts);
2764
2765         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2766                         atomic_read(&nesvnic->netdev->refcnt));
2767
2768         /* allocate the ietf frame and space for private data */
2769         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2770                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2771                 &nesqp->ietf_frame_pbase);
2772
2773         if (!nesqp->ietf_frame) {
2774                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2775                         "data\n");
2776                 return -ENOMEM;
2777         }
2778
2779
2780         /* setup the MPA frame */
2781         nesqp->private_data_len = conn_param->private_data_len;
2782         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2783
2784         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2785                         conn_param->private_data_len);
2786
2787         nesqp->ietf_frame->priv_data_len =
2788                 cpu_to_be16(conn_param->private_data_len);
2789         nesqp->ietf_frame->rev = mpa_version;
2790         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2791
2792         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2793         wqe = &nesqp->hwqp.sq_vbase[0];
2794
2795         if (cm_id->remote_addr.sin_addr.s_addr !=
2796                         cm_id->local_addr.sin_addr.s_addr) {
2797                 u64temp = (unsigned long)nesqp;
2798                 nesibdev = nesvnic->nesibdev;
2799                 nespd = nesqp->nespd;
2800                 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2801                 ibphysbuf.size = conn_param->private_data_len +
2802                                         sizeof(struct ietf_mpa_frame);
2803                 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2804                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2805                                                 &ibphysbuf, 1,
2806                                                 IB_ACCESS_LOCAL_WRITE,
2807                                                 &tagged_offset);
2808                 if (!ibmr) {
2809                         nes_debug(NES_DBG_CM, "Unable to register memory region"
2810                                         "for lSMM for cm_node = %p \n",
2811                                         cm_node);
2812                         pci_free_consistent(nesdev->pcidev,
2813                                 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2814                                 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2815                         return -ENOMEM;
2816                 }
2817
2818                 ibmr->pd = &nespd->ibpd;
2819                 ibmr->device = nespd->ibpd.device;
2820                 nesqp->lsmm_mr = ibmr;
2821
2822                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2823                 set_wqe_64bit_value(wqe->wqe_words,
2824                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2825                         u64temp);
2826                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2827                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2828                         NES_IWARP_SQ_WQE_WRPDU);
2829                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2830                         cpu_to_le32(conn_param->private_data_len +
2831                         sizeof(struct ietf_mpa_frame));
2832                 set_wqe_64bit_value(wqe->wqe_words,
2833                                         NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2834                                         (u64)(unsigned long)nesqp->ietf_frame);
2835                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2836                         cpu_to_le32(conn_param->private_data_len +
2837                         sizeof(struct ietf_mpa_frame));
2838                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2839
2840                 nesqp->nesqp_context->ird_ord_sizes |=
2841                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2842                         NES_QPCONTEXT_ORDIRD_WRPDU);
2843         } else {
2844                 nesqp->nesqp_context->ird_ord_sizes |=
2845                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2846         }
2847         nesqp->skip_lsmm = 1;
2848
2849
2850         /* Cache the cm_id in the qp */
2851         nesqp->cm_id = cm_id;
2852         cm_node->cm_id = cm_id;
2853
2854         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2855         cm_id->provider_data = nesqp;
2856         nesqp->active_conn   = 0;
2857
2858         if (cm_node->state == NES_CM_STATE_TSA)
2859                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2860                         cm_node);
2861
2862         nes_cm_init_tsa_conn(nesqp, cm_node);
2863
2864         nesqp->nesqp_context->tcpPorts[0] =
2865                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2866         nesqp->nesqp_context->tcpPorts[1] =
2867                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2868
2869         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2870                 nesqp->nesqp_context->ip0 =
2871                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2872         else
2873                 nesqp->nesqp_context->ip0 =
2874                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2875
2876         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2877                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2878                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2879
2880         nesqp->nesqp_context->arp_index_vlan |=
2881                 cpu_to_le32(nes_arp_table(nesdev,
2882                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2883                         NES_ARP_RESOLVE) << 16);
2884
2885         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2886                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2887
2888         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2889
2890         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2891                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2892         nesqp->nesqp_context->ird_ord_sizes |=
2893                 cpu_to_le32((u32)conn_param->ord);
2894
2895         memset(&nes_quad, 0, sizeof(nes_quad));
2896         nes_quad.DstIpAdrIndex =
2897                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2898         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2899                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2900         else
2901                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2902         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2903         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2904
2905         /* Produce hash key */
2906         crc_value = get_crc_value(&nes_quad);
2907         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2908         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2909                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2910
2911         nesqp->hte_index &= adapter->hte_index_mask;
2912         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2913
2914         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2915
2916         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2917                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2918                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2919                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2920                         ntohs(cm_id->remote_addr.sin_port),
2921                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2922                         ntohs(cm_id->local_addr.sin_port),
2923                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2924                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2925                         conn_param->private_data_len +
2926                         sizeof(struct ietf_mpa_frame));
2927
2928
2929         /* notify OF layer that accept event was successful */
2930         cm_id->add_ref(cm_id);
2931         nes_add_ref(&nesqp->ibqp);
2932
2933         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2934         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2935         cm_event.provider_data = (void *)nesqp;
2936         cm_event.local_addr = cm_id->local_addr;
2937         cm_event.remote_addr = cm_id->remote_addr;
2938         cm_event.private_data = NULL;
2939         cm_event.private_data_len = 0;
2940         ret = cm_id->event_handler(cm_id, &cm_event);
2941         attr.qp_state = IB_QPS_RTS;
2942         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2943         if (cm_node->loopbackpartner) {
2944                 cm_node->loopbackpartner->mpa_frame_size =
2945                         nesqp->private_data_len;
2946                 /* copy entire MPA frame to our cm_node's frame */
2947                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2948                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2949                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2950         }
2951         if (ret)
2952                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2953                         "ret=%d\n", __func__, __LINE__, ret);
2954
2955         passive_state = atomic_add_return(1, &cm_node->passive_state);
2956         if (passive_state == NES_SEND_RESET_EVENT)
2957                 create_event(cm_node, NES_CM_EVENT_RESET);
2958         return 0;
2959 }
2960
2961
2962 /**
2963  * nes_reject
2964  */
2965 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2966 {
2967         struct nes_cm_node *cm_node;
2968         struct nes_cm_node *loopback;
2969
2970         struct nes_cm_core *cm_core;
2971
2972         atomic_inc(&cm_rejects);
2973         cm_node = (struct nes_cm_node *) cm_id->provider_data;
2974         loopback = cm_node->loopbackpartner;
2975         cm_core = cm_node->cm_core;
2976         cm_node->cm_id = cm_id;
2977         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2978
2979         if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
2980                 return -EINVAL;
2981
2982         memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2983         if (loopback) {
2984                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
2985                 loopback->mpa_frame.priv_data_len = pdata_len;
2986                 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
2987                                 pdata_len;
2988         } else {
2989                 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2990                 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2991         }
2992
2993         cm_node->mpa_frame.rev = mpa_version;
2994         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2995
2996         return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2997 }
2998
2999
3000 /**
3001  * nes_connect
3002  * setup and launch cm connect node
3003  */
3004 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3005 {
3006         struct ib_qp *ibqp;
3007         struct nes_qp *nesqp;
3008         struct nes_vnic *nesvnic;
3009         struct nes_device *nesdev;
3010         struct nes_cm_node *cm_node;
3011         struct nes_cm_info cm_info;
3012         int apbvt_set = 0;
3013
3014         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3015         if (!ibqp)
3016                 return -EINVAL;
3017         nesqp = to_nesqp(ibqp);
3018         if (!nesqp)
3019                 return -EINVAL;
3020         nesvnic = to_nesvnic(nesqp->ibqp.device);
3021         if (!nesvnic)
3022                 return -EINVAL;
3023         nesdev  = nesvnic->nesdev;
3024         if (!nesdev)
3025                 return -EINVAL;
3026
3027         if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3028                 return -EINVAL;
3029
3030         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3031                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3032                 ntohl(nesvnic->local_ipaddr),
3033                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3034                 ntohs(cm_id->remote_addr.sin_port),
3035                 ntohl(cm_id->local_addr.sin_addr.s_addr),
3036                 ntohs(cm_id->local_addr.sin_port));
3037
3038         atomic_inc(&cm_connects);
3039         nesqp->active_conn = 1;
3040
3041         /* cache the cm_id in the qp */
3042         nesqp->cm_id = cm_id;
3043
3044         cm_id->provider_data = nesqp;
3045
3046         nesqp->private_data_len = conn_param->private_data_len;
3047         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3048         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3049         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3050                 conn_param->private_data_len);
3051
3052         if (cm_id->local_addr.sin_addr.s_addr !=
3053                 cm_id->remote_addr.sin_addr.s_addr) {
3054                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3055                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3056                 apbvt_set = 1;
3057         }
3058
3059         /* set up the connection params for the node */
3060         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3061         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3062         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3063         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3064         cm_info.cm_id = cm_id;
3065         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3066
3067         cm_id->add_ref(cm_id);
3068
3069         /* create a connect CM node connection */
3070         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3071                 conn_param->private_data_len, (void *)conn_param->private_data,
3072                 &cm_info);
3073         if (!cm_node) {
3074                 if (apbvt_set)
3075                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3076                                 PCI_FUNC(nesdev->pcidev->devfn),
3077                                 NES_MANAGE_APBVT_DEL);
3078
3079                 cm_id->rem_ref(cm_id);
3080                 return -ENOMEM;
3081         }
3082
3083         cm_node->apbvt_set = apbvt_set;
3084         nesqp->cm_node = cm_node;
3085         cm_node->nesqp = nesqp;
3086         nes_add_ref(&nesqp->ibqp);
3087
3088         return 0;
3089 }
3090
3091
3092 /**
3093  * nes_create_listen
3094  */
3095 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3096 {
3097         struct nes_vnic *nesvnic;
3098         struct nes_cm_listener *cm_node;
3099         struct nes_cm_info cm_info;
3100         struct nes_adapter *adapter;
3101         int err;
3102
3103
3104         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3105                         cm_id, ntohs(cm_id->local_addr.sin_port));
3106
3107         nesvnic = to_nesvnic(cm_id->device);
3108         if (!nesvnic)
3109                 return -EINVAL;
3110         adapter = nesvnic->nesdev->nesadapter;
3111         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3112                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3113
3114         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3115                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3116
3117         /* setup listen params in our api call struct */
3118         cm_info.loc_addr = nesvnic->local_ipaddr;
3119         cm_info.loc_port = cm_id->local_addr.sin_port;
3120         cm_info.backlog = backlog;
3121         cm_info.cm_id = cm_id;
3122
3123         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3124
3125
3126         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3127         if (!cm_node) {
3128                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3129                                 __func__, __LINE__);
3130                 return -ENOMEM;
3131         }
3132
3133         cm_id->provider_data = cm_node;
3134
3135         if (!cm_node->reused_node) {
3136                 err = nes_manage_apbvt(nesvnic,
3137                         ntohs(cm_id->local_addr.sin_port),
3138                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3139                         NES_MANAGE_APBVT_ADD);
3140                 if (err) {
3141                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3142                                 err);
3143                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3144                         return err;
3145                 }
3146                 cm_listens_created++;
3147         }
3148
3149         cm_id->add_ref(cm_id);
3150         cm_id->provider_data = (void *)cm_node;
3151
3152
3153         return 0;
3154 }
3155
3156
3157 /**
3158  * nes_destroy_listen
3159  */
3160 int nes_destroy_listen(struct iw_cm_id *cm_id)
3161 {
3162         if (cm_id->provider_data)
3163                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3164         else
3165                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3166
3167         cm_id->rem_ref(cm_id);
3168
3169         return 0;
3170 }
3171
3172
3173 /**
3174  * nes_cm_recv
3175  */
3176 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3177 {
3178         int rc = 0;
3179         cm_packets_received++;
3180         if ((g_cm_core) && (g_cm_core->api)) {
3181                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3182         } else {
3183                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3184                                 " cm is not setup properly.\n");
3185         }
3186
3187         return rc;
3188 }
3189
3190
3191 /**
3192  * nes_cm_start
3193  * Start and init a cm core module
3194  */
3195 int nes_cm_start(void)
3196 {
3197         nes_debug(NES_DBG_CM, "\n");
3198         /* create the primary CM core, pass this handle to subsequent core inits */
3199         g_cm_core = nes_cm_alloc_core();
3200         if (g_cm_core) {
3201                 return 0;
3202         } else {
3203                 return -ENOMEM;
3204         }
3205 }
3206
3207
3208 /**
3209  * nes_cm_stop
3210  * stop and dealloc all cm core instances
3211  */
3212 int nes_cm_stop(void)
3213 {
3214         g_cm_core->api->destroy_cm_core(g_cm_core);
3215         return 0;
3216 }
3217
3218
3219 /**
3220  * cm_event_connected
3221  * handle a connected event, setup QPs and HW
3222  */
3223 static void cm_event_connected(struct nes_cm_event *event)
3224 {
3225         u64 u64temp;
3226         struct nes_qp *nesqp;
3227         struct nes_vnic *nesvnic;
3228         struct nes_device *nesdev;
3229         struct nes_cm_node *cm_node;
3230         struct nes_adapter *nesadapter;
3231         struct ib_qp_attr attr;
3232         struct iw_cm_id *cm_id;
3233         struct iw_cm_event cm_event;
3234         struct nes_hw_qp_wqe *wqe;
3235         struct nes_v4_quad nes_quad;
3236         u32 crc_value;
3237         int ret;
3238
3239         /* get all our handles */
3240         cm_node = event->cm_node;
3241         cm_id = cm_node->cm_id;
3242         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3243         nesqp = (struct nes_qp *)cm_id->provider_data;
3244         nesvnic = to_nesvnic(nesqp->ibqp.device);
3245         nesdev = nesvnic->nesdev;
3246         nesadapter = nesdev->nesadapter;
3247
3248         if (nesqp->destroyed) {
3249                 return;
3250         }
3251         atomic_inc(&cm_connecteds);
3252         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3253                         " local port 0x%04X. jiffies = %lu.\n",
3254                         nesqp->hwqp.qp_id,
3255                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3256                         ntohs(cm_id->remote_addr.sin_port),
3257                         ntohs(cm_id->local_addr.sin_port),
3258                         jiffies);
3259
3260         nes_cm_init_tsa_conn(nesqp, cm_node);
3261
3262         /* set the QP tsa context */
3263         nesqp->nesqp_context->tcpPorts[0] =
3264                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3265         nesqp->nesqp_context->tcpPorts[1] =
3266                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3267         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3268                 nesqp->nesqp_context->ip0 =
3269                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3270         else
3271                 nesqp->nesqp_context->ip0 =
3272                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3273
3274         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3275                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3276                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3277         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3278                         nes_arp_table(nesdev,
3279                         le32_to_cpu(nesqp->nesqp_context->ip0),
3280                         NULL, NES_ARP_RESOLVE) << 16);
3281         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3282                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3283         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3284         nesqp->nesqp_context->ird_ord_sizes |=
3285                         cpu_to_le32((u32)1 <<
3286                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3287
3288         /* Adjust tail for not having a LSMM */
3289         nesqp->hwqp.sq_tail = 1;
3290
3291 #if defined(NES_SEND_FIRST_WRITE)
3292         if (cm_node->send_write0) {
3293                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3294                 wqe = &nesqp->hwqp.sq_vbase[0];
3295                 u64temp = (unsigned long)nesqp;
3296                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3297                 set_wqe_64bit_value(wqe->wqe_words,
3298                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3299                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3300                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3301                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3302                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3303                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3304                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3305                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3306
3307                 /* use the reserved spot on the WQ for the extra first WQE */
3308                 nesqp->nesqp_context->ird_ord_sizes &=
3309                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3310                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3311                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3312                 nesqp->skip_lsmm = 1;
3313                 nesqp->hwqp.sq_tail = 0;
3314                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3315                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3316         }
3317 #endif
3318
3319         memset(&nes_quad, 0, sizeof(nes_quad));
3320
3321         nes_quad.DstIpAdrIndex =
3322                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3323         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3324                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3325         else
3326                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3327         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3328         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3329
3330         /* Produce hash key */
3331         crc_value = get_crc_value(&nes_quad);
3332         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3333         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3334                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3335
3336         nesqp->hte_index &= nesadapter->hte_index_mask;
3337         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3338
3339         nesqp->ietf_frame = &cm_node->mpa_frame;
3340         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3341         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3342
3343         /* notify OF layer we successfully created the requested connection */
3344         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3345         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3346         cm_event.provider_data = cm_id->provider_data;
3347         cm_event.local_addr.sin_family = AF_INET;
3348         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3349         cm_event.remote_addr = cm_id->remote_addr;
3350
3351         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3352         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3353
3354         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3355         ret = cm_id->event_handler(cm_id, &cm_event);
3356         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3357
3358         if (ret)
3359                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3360                         "ret=%d\n", __func__, __LINE__, ret);
3361         attr.qp_state = IB_QPS_RTS;
3362         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3363
3364         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3365                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3366
3367         return;
3368 }
3369
3370
3371 /**
3372  * cm_event_connect_error
3373  */
3374 static void cm_event_connect_error(struct nes_cm_event *event)
3375 {
3376         struct nes_qp *nesqp;
3377         struct iw_cm_id *cm_id;
3378         struct iw_cm_event cm_event;
3379         /* struct nes_cm_info cm_info; */
3380         int ret;
3381
3382         if (!event->cm_node)
3383                 return;
3384
3385         cm_id = event->cm_node->cm_id;
3386         if (!cm_id) {
3387                 return;
3388         }
3389
3390         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3391         nesqp = cm_id->provider_data;
3392
3393         if (!nesqp) {
3394                 return;
3395         }
3396
3397         /* notify OF layer about this connection error event */
3398         /* cm_id->rem_ref(cm_id); */
3399         nesqp->cm_id = NULL;
3400         cm_id->provider_data = NULL;
3401         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3402         cm_event.status = -ECONNRESET;
3403         cm_event.provider_data = cm_id->provider_data;
3404         cm_event.local_addr = cm_id->local_addr;
3405         cm_event.remote_addr = cm_id->remote_addr;
3406         cm_event.private_data = NULL;
3407         cm_event.private_data_len = 0;
3408
3409         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3410                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3411                 cm_event.remote_addr.sin_addr.s_addr);
3412
3413         ret = cm_id->event_handler(cm_id, &cm_event);
3414         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3415         if (ret)
3416                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3417                         "ret=%d\n", __func__, __LINE__, ret);
3418         cm_id->rem_ref(cm_id);
3419
3420         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3421         return;
3422 }
3423
3424
3425 /**
3426  * cm_event_reset
3427  */
3428 static void cm_event_reset(struct nes_cm_event *event)
3429 {
3430         struct nes_qp *nesqp;
3431         struct iw_cm_id *cm_id;
3432         struct iw_cm_event cm_event;
3433         /* struct nes_cm_info cm_info; */
3434         int ret;
3435
3436         if (!event->cm_node)
3437                 return;
3438
3439         if (!event->cm_node->cm_id)
3440                 return;
3441
3442         cm_id = event->cm_node->cm_id;
3443
3444         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3445         nesqp = cm_id->provider_data;
3446         if (!nesqp)
3447                 return;
3448
3449         nesqp->cm_id = NULL;
3450         /* cm_id->provider_data = NULL; */
3451         cm_event.event = IW_CM_EVENT_DISCONNECT;
3452         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3453         cm_event.provider_data = cm_id->provider_data;
3454         cm_event.local_addr = cm_id->local_addr;
3455         cm_event.remote_addr = cm_id->remote_addr;
3456         cm_event.private_data = NULL;
3457         cm_event.private_data_len = 0;
3458
3459         cm_id->add_ref(cm_id);
3460         ret = cm_id->event_handler(cm_id, &cm_event);
3461         atomic_inc(&cm_closes);
3462         cm_event.event = IW_CM_EVENT_CLOSE;
3463         cm_event.status = IW_CM_EVENT_STATUS_OK;
3464         cm_event.provider_data = cm_id->provider_data;
3465         cm_event.local_addr = cm_id->local_addr;
3466         cm_event.remote_addr = cm_id->remote_addr;
3467         cm_event.private_data = NULL;
3468         cm_event.private_data_len = 0;
3469         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3470         ret = cm_id->event_handler(cm_id, &cm_event);
3471
3472         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3473
3474
3475         /* notify OF layer about this connection error event */
3476         cm_id->rem_ref(cm_id);
3477
3478         return;
3479 }
3480
3481
3482 /**
3483  * cm_event_mpa_req
3484  */
3485 static void cm_event_mpa_req(struct nes_cm_event *event)
3486 {
3487         struct iw_cm_id   *cm_id;
3488         struct iw_cm_event cm_event;
3489         int ret;
3490         struct nes_cm_node *cm_node;
3491
3492         cm_node = event->cm_node;
3493         if (!cm_node)
3494                 return;
3495         cm_id = cm_node->cm_id;
3496
3497         atomic_inc(&cm_connect_reqs);
3498         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3499                         cm_node, cm_id, jiffies);
3500
3501         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3502         cm_event.status = IW_CM_EVENT_STATUS_OK;
3503         cm_event.provider_data = (void *)cm_node;
3504
3505         cm_event.local_addr.sin_family = AF_INET;
3506         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3507         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3508
3509         cm_event.remote_addr.sin_family = AF_INET;
3510         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3511         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3512         cm_event.private_data = cm_node->mpa_frame_buf;
3513         cm_event.private_data_len  = (u8) cm_node->mpa_frame_size;
3514
3515         ret = cm_id->event_handler(cm_id, &cm_event);
3516         if (ret)
3517                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3518                                 __func__, __LINE__, ret);
3519         return;
3520 }
3521
3522
3523 static void cm_event_mpa_reject(struct nes_cm_event *event)
3524 {
3525         struct iw_cm_id   *cm_id;
3526         struct iw_cm_event cm_event;
3527         struct nes_cm_node *cm_node;
3528         int ret;
3529
3530         cm_node = event->cm_node;
3531         if (!cm_node)
3532                 return;
3533         cm_id = cm_node->cm_id;
3534
3535         atomic_inc(&cm_connect_reqs);
3536         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3537                         cm_node, cm_id, jiffies);
3538
3539         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3540         cm_event.status = -ECONNREFUSED;
3541         cm_event.provider_data = cm_id->provider_data;
3542
3543         cm_event.local_addr.sin_family = AF_INET;
3544         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3545         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3546
3547         cm_event.remote_addr.sin_family = AF_INET;
3548         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3549         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3550
3551         cm_event.private_data = cm_node->mpa_frame_buf;
3552         cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3553
3554         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3555                         "remove_addr=%08x\n",
3556                         cm_event.local_addr.sin_addr.s_addr,
3557                         cm_event.remote_addr.sin_addr.s_addr);
3558
3559         ret = cm_id->event_handler(cm_id, &cm_event);
3560         if (ret)
3561                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3562                                 __func__, __LINE__, ret);
3563
3564         return;
3565 }
3566
3567
3568 static void nes_cm_event_handler(struct work_struct *);
3569
3570 /**
3571  * nes_cm_post_event
3572  * post an event to the cm event handler
3573  */
3574 static int nes_cm_post_event(struct nes_cm_event *event)
3575 {
3576         atomic_inc(&event->cm_node->cm_core->events_posted);
3577         add_ref_cm_node(event->cm_node);
3578         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3579         INIT_WORK(&event->event_work, nes_cm_event_handler);
3580         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3581                 event->cm_node, event);
3582
3583         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3584
3585         nes_debug(NES_DBG_CM, "Exit\n");
3586         return 0;
3587 }
3588
3589
3590 /**
3591  * nes_cm_event_handler
3592  * worker function to handle cm events
3593  * will free instance of nes_cm_event
3594  */
3595 static void nes_cm_event_handler(struct work_struct *work)
3596 {
3597         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3598                         event_work);
3599         struct nes_cm_core *cm_core;
3600
3601         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3602                 return;
3603
3604         cm_core = event->cm_node->cm_core;
3605         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3606                 event, event->type, atomic_read(&cm_core->events_posted));
3607
3608         switch (event->type) {
3609         case NES_CM_EVENT_MPA_REQ:
3610                 cm_event_mpa_req(event);
3611                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3612                         event->cm_node);
3613                 break;
3614         case NES_CM_EVENT_RESET:
3615                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3616                         event->cm_node);
3617                 cm_event_reset(event);
3618                 break;
3619         case NES_CM_EVENT_CONNECTED:
3620                 if ((!event->cm_node->cm_id) ||
3621                         (event->cm_node->state != NES_CM_STATE_TSA))
3622                         break;
3623                 cm_event_connected(event);
3624                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3625                 break;
3626         case NES_CM_EVENT_MPA_REJECT:
3627                 if ((!event->cm_node->cm_id) ||
3628                                 (event->cm_node->state == NES_CM_STATE_TSA))
3629                         break;
3630                 cm_event_mpa_reject(event);
3631                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3632                 break;
3633
3634         case NES_CM_EVENT_ABORTED:
3635                 if ((!event->cm_node->cm_id) ||
3636                         (event->cm_node->state == NES_CM_STATE_TSA))
3637                         break;
3638                 cm_event_connect_error(event);
3639                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3640                 break;
3641         case NES_CM_EVENT_DROPPED_PKT:
3642                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3643                 break;
3644         default:
3645                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3646                 break;
3647         }
3648
3649         atomic_dec(&cm_core->events_posted);
3650         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3651         rem_ref_cm_node(cm_core, event->cm_node);
3652         kfree(event);
3653
3654         return;
3655 }