git.oblomov.eu Git - linux-2.6/blob - drivers/infiniband/hw/nes/nes_cm.c

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