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
1031         memset(&fl, 0, sizeof fl);
1032         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1033         if (ip_route_output_key(&init_net, &rt, &fl)) {
1034                 printk("%s: ip_route_output_key failed for 0x%08X\n",
1035                                 __func__, dst_ip);
1036                 return rc;
1037         }
1038
1039         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1040         if (neigh) {
1041                 if (neigh->nud_state & NUD_VALID) {
1042                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1043                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1044                                   neigh->ha, ntohl(rt->rt_gateway));
1045                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1046                                              dst_ip, NES_ARP_ADD);
1047                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1048                                            NES_ARP_RESOLVE);
1049                 }
1050                 neigh_release(neigh);
1051         }
1052
1053         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1054                 neigh_event_send(rt->u.dst.neighbour, NULL);
1055
1056         ip_rt_put(rt);
1057         return rc;
1058 }
1059
1060
1061 /**
1062  * make_cm_node - create a new instance of a cm node
1063  */
1064 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1065                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1066                 struct nes_cm_listener *listener)
1067 {
1068         struct nes_cm_node *cm_node;
1069         struct timespec ts;
1070         int arpindex = 0;
1071         struct nes_device *nesdev;
1072         struct nes_adapter *nesadapter;
1073
1074         /* create an hte and cm_node for this instance */
1075         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1076         if (!cm_node)
1077                 return NULL;
1078
1079         /* set our node specific transport info */
1080         cm_node->loc_addr = cm_info->loc_addr;
1081         cm_node->rem_addr = cm_info->rem_addr;
1082         cm_node->loc_port = cm_info->loc_port;
1083         cm_node->rem_port = cm_info->rem_port;
1084         cm_node->send_write0 = send_first;
1085         nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT
1086                         ":%x, rem = " NIPQUAD_FMT ":%x\n",
1087                         HIPQUAD(cm_node->loc_addr), cm_node->loc_port,
1088                         HIPQUAD(cm_node->rem_addr), cm_node->rem_port);
1089         cm_node->listener = listener;
1090         cm_node->netdev = nesvnic->netdev;
1091         cm_node->cm_id = cm_info->cm_id;
1092         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1093
1094         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1095                         cm_node->cm_id);
1096
1097         spin_lock_init(&cm_node->retrans_list_lock);
1098         INIT_LIST_HEAD(&cm_node->recv_list);
1099         spin_lock_init(&cm_node->recv_list_lock);
1100
1101         cm_node->loopbackpartner = NULL;
1102         atomic_set(&cm_node->ref_count, 1);
1103         /* associate our parent CM core */
1104         cm_node->cm_core = cm_core;
1105         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1106         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1107         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1108                         NES_CM_DEFAULT_RCV_WND_SCALE;
1109         ts = current_kernel_time();
1110         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1111         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1112                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1113         cm_node->tcp_cntxt.rcv_nxt = 0;
1114         /* get a unique session ID , add thread_id to an upcounter to handle race */
1115         atomic_inc(&cm_core->node_cnt);
1116         cm_node->conn_type = cm_info->conn_type;
1117         cm_node->apbvt_set = 0;
1118         cm_node->accept_pend = 0;
1119
1120         cm_node->nesvnic = nesvnic;
1121         /* get some device handles, for arp lookup */
1122         nesdev = nesvnic->nesdev;
1123         nesadapter = nesdev->nesadapter;
1124
1125         cm_node->loopbackpartner = NULL;
1126         /* get the mac addr for the remote node */
1127         arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1128         if (arpindex < 0) {
1129                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1130                 if (arpindex < 0) {
1131                         kfree(cm_node);
1132                         return NULL;
1133                 }
1134         }
1135
1136         /* copy the mac addr to node context */
1137         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1138         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1139                   cm_node->rem_mac);
1140
1141         add_hte_node(cm_core, cm_node);
1142         atomic_inc(&cm_nodes_created);
1143
1144         return cm_node;
1145 }
1146
1147
1148 /**
1149  * add_ref_cm_node - destroy an instance of a cm node
1150  */
1151 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1152 {
1153         atomic_inc(&cm_node->ref_count);
1154         return 0;
1155 }
1156
1157
1158 /**
1159  * rem_ref_cm_node - destroy an instance of a cm node
1160  */
1161 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1162         struct nes_cm_node *cm_node)
1163 {
1164         unsigned long flags, qplockflags;
1165         struct nes_timer_entry *recv_entry;
1166         struct iw_cm_id *cm_id;
1167         struct list_head *list_core, *list_node_temp;
1168         struct nes_qp *nesqp;
1169
1170         if (!cm_node)
1171                 return -EINVAL;
1172
1173         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1174         if (atomic_dec_return(&cm_node->ref_count)) {
1175                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1176                 return 0;
1177         }
1178         list_del(&cm_node->list);
1179         atomic_dec(&cm_core->ht_node_cnt);
1180         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1181
1182         /* if the node is destroyed before connection was accelerated */
1183         if (!cm_node->accelerated && cm_node->accept_pend) {
1184                 BUG_ON(!cm_node->listener);
1185                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1186                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1187         }
1188         BUG_ON(cm_node->send_entry);
1189         spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1190         list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1191                 recv_entry = container_of(list_core, struct nes_timer_entry,
1192                                 list);
1193                 list_del(&recv_entry->list);
1194                 cm_id = cm_node->cm_id;
1195                 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1196                 nesqp = (struct nes_qp *)recv_entry->skb;
1197                 spin_lock_irqsave(&nesqp->lock, qplockflags);
1198                 if (nesqp->cm_id) {
1199                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1200                                 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1201                                 nesqp->hwqp.qp_id, cm_id);
1202                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1203                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1204                         nesqp->ibqp_state = IB_QPS_ERR;
1205                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1206                         nes_cm_disconn(nesqp);
1207                 } else {
1208                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1209                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1210                                 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1211                                 nesqp->hwqp.qp_id, cm_id);
1212                 }
1213                 cm_id->rem_ref(cm_id);
1214
1215                 kfree(recv_entry);
1216                 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1217         }
1218         spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1219
1220         if (cm_node->listener) {
1221                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1222         } else {
1223                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1224                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1225                                 PCI_FUNC(
1226                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1227                                 NES_MANAGE_APBVT_DEL);
1228                 }
1229         }
1230
1231         atomic_dec(&cm_core->node_cnt);
1232         atomic_inc(&cm_nodes_destroyed);
1233         nesqp = cm_node->nesqp;
1234         if (nesqp) {
1235                 nesqp->cm_node = NULL;
1236                 nes_rem_ref(&nesqp->ibqp);
1237                 cm_node->nesqp = NULL;
1238         }
1239
1240         cm_node->freed = 1;
1241         kfree(cm_node);
1242         return 0;
1243 }
1244
1245 /**
1246  * process_options
1247  */
1248 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1249         u32 optionsize, u32 syn_packet)
1250 {
1251         u32 tmp;
1252         u32 offset = 0;
1253         union all_known_options *all_options;
1254         char got_mss_option = 0;
1255
1256         while (offset < optionsize) {
1257                 all_options = (union all_known_options *)(optionsloc + offset);
1258                 switch (all_options->as_base.optionnum) {
1259                 case OPTION_NUMBER_END:
1260                         offset = optionsize;
1261                         break;
1262                 case OPTION_NUMBER_NONE:
1263                         offset += 1;
1264                         continue;
1265                 case OPTION_NUMBER_MSS:
1266                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1267                                 "Size: %d\n", __func__,
1268                                 all_options->as_mss.length, offset, optionsize);
1269                         got_mss_option = 1;
1270                         if (all_options->as_mss.length != 4) {
1271                                 return 1;
1272                         } else {
1273                                 tmp = ntohs(all_options->as_mss.mss);
1274                                 if (tmp > 0 && tmp <
1275                                         cm_node->tcp_cntxt.mss)
1276                                         cm_node->tcp_cntxt.mss = tmp;
1277                         }
1278                         break;
1279                 case OPTION_NUMBER_WINDOW_SCALE:
1280                         cm_node->tcp_cntxt.snd_wscale =
1281                                 all_options->as_windowscale.shiftcount;
1282                         break;
1283                 case OPTION_NUMBER_WRITE0:
1284                         cm_node->send_write0 = 1;
1285                         break;
1286                 default:
1287                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1288                                 all_options->as_base.optionnum);
1289                         break;
1290                 }
1291                 offset += all_options->as_base.length;
1292         }
1293         if ((!got_mss_option) && (syn_packet))
1294                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1295         return 0;
1296 }
1297
1298 static void drop_packet(struct sk_buff *skb)
1299 {
1300         atomic_inc(&cm_accel_dropped_pkts);
1301         dev_kfree_skb_any(skb);
1302 }
1303
1304 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1305         struct tcphdr *tcph)
1306 {
1307         atomic_inc(&cm_resets_recvd);
1308         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1309                 "refcnt=%d\n", cm_node, cm_node->state,
1310                 atomic_read(&cm_node->ref_count));
1311         cm_node->tcp_cntxt.rcv_nxt++;
1312         cleanup_retrans_entry(cm_node);
1313         switch (cm_node->state) {
1314         case NES_CM_STATE_SYN_RCVD:
1315         case NES_CM_STATE_SYN_SENT:
1316         case NES_CM_STATE_ESTABLISHED:
1317         case NES_CM_STATE_MPAREQ_SENT:
1318                 cm_node->state = NES_CM_STATE_LAST_ACK;
1319                 send_fin(cm_node, skb);
1320                 break;
1321         case NES_CM_STATE_FIN_WAIT1:
1322                 cm_node->state = NES_CM_STATE_CLOSING;
1323                 send_ack(cm_node, skb);
1324                 break;
1325         case NES_CM_STATE_FIN_WAIT2:
1326                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1327                 send_ack(cm_node, skb);
1328                 cm_node->state = NES_CM_STATE_CLOSED;
1329                 break;
1330         case NES_CM_STATE_TSA:
1331         default:
1332                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1333                         cm_node, cm_node->state);
1334                 drop_packet(skb);
1335                 break;
1336         }
1337 }
1338
1339
1340 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1341         struct tcphdr *tcph)
1342 {
1343
1344         int     reset = 0;      /* whether to send reset in case of err.. */
1345         atomic_inc(&cm_resets_recvd);
1346         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1347                         " refcnt=%d\n", cm_node, cm_node->state,
1348                         atomic_read(&cm_node->ref_count));
1349         cleanup_retrans_entry(cm_node);
1350         switch (cm_node->state) {
1351         case NES_CM_STATE_SYN_SENT:
1352         case NES_CM_STATE_MPAREQ_SENT:
1353                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1354                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1355                         cm_node->listener, cm_node->state);
1356                 active_open_err(cm_node, skb, reset);
1357                 break;
1358         /* For PASSIVE open states, remove the cm_node event */
1359         case NES_CM_STATE_ESTABLISHED:
1360         case NES_CM_STATE_SYN_RCVD:
1361         case NES_CM_STATE_LISTENING:
1362                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1363                 passive_open_err(cm_node, skb, reset);
1364                 break;
1365         case NES_CM_STATE_TSA:
1366         default:
1367                 break;
1368         }
1369 }
1370
1371 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1372         enum nes_cm_event_type type)
1373 {
1374
1375         int     ret;
1376         int datasize = skb->len;
1377         u8 *dataloc = skb->data;
1378         ret = parse_mpa(cm_node, dataloc, datasize);
1379         if (ret < 0) {
1380                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1381                 if (type == NES_CM_EVENT_CONNECTED) {
1382                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1383                                 "cm_node=%p listener=%p state=%d\n", __func__,
1384                                 __LINE__, cm_node, cm_node->listener,
1385                                 cm_node->state);
1386                         active_open_err(cm_node, skb, 1);
1387                 } else {
1388                         passive_open_err(cm_node, skb, 1);
1389                 }
1390         } else {
1391                 cleanup_retrans_entry(cm_node);
1392                 dev_kfree_skb_any(skb);
1393                 if (type == NES_CM_EVENT_CONNECTED)
1394                         cm_node->state = NES_CM_STATE_TSA;
1395                 create_event(cm_node, type);
1396
1397         }
1398         return ;
1399 }
1400
1401 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1402 {
1403         switch (cm_node->state) {
1404         case NES_CM_STATE_SYN_SENT:
1405         case NES_CM_STATE_MPAREQ_SENT:
1406                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1407                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1408                         cm_node->listener, cm_node->state);
1409                 active_open_err(cm_node, skb, 1);
1410                 break;
1411         case NES_CM_STATE_ESTABLISHED:
1412         case NES_CM_STATE_SYN_RCVD:
1413                 passive_open_err(cm_node, skb, 1);
1414                 break;
1415         case NES_CM_STATE_TSA:
1416         default:
1417                 drop_packet(skb);
1418         }
1419 }
1420
1421 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1422         struct sk_buff *skb)
1423 {
1424         int err;
1425
1426         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1427         if (err)
1428                 active_open_err(cm_node, skb, 1);
1429
1430         return err;
1431 }
1432
1433 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1434         struct sk_buff *skb)
1435 {
1436         int err = 0;
1437         u32 seq;
1438         u32 ack_seq;
1439         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1440         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1441         u32 rcv_wnd;
1442         seq = ntohl(tcph->seq);
1443         ack_seq = ntohl(tcph->ack_seq);
1444         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1445         if (ack_seq != loc_seq_num)
1446                 err = 1;
1447         else if ((seq + rcv_wnd) < rcv_nxt)
1448                 err = 1;
1449         if (err) {
1450                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1451                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1452                         cm_node->listener, cm_node->state);
1453                 indicate_pkt_err(cm_node, skb);
1454                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1455                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1456                         rcv_wnd);
1457         }
1458         return err;
1459 }
1460
1461 /*
1462  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1463  * is created with a listener or it may comein as rexmitted packet which in
1464  * that case will be just dropped.
1465  */
1466
1467 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1468         struct tcphdr *tcph)
1469 {
1470         int ret;
1471         u32 inc_sequence;
1472         int optionsize;
1473
1474         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1475         skb_pull(skb, tcph->doff << 2);
1476         inc_sequence = ntohl(tcph->seq);
1477
1478         switch (cm_node->state) {
1479         case NES_CM_STATE_SYN_SENT:
1480         case NES_CM_STATE_MPAREQ_SENT:
1481                 /* Rcvd syn on active open connection*/
1482                 active_open_err(cm_node, skb, 1);
1483                 break;
1484         case NES_CM_STATE_LISTENING:
1485                 /* Passive OPEN */
1486                 cm_node->accept_pend = 1;
1487                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1488                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1489                                 cm_node->listener->backlog) {
1490                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1491                                 "pressure \n");
1492                         cm_backlog_drops++;
1493                         passive_open_err(cm_node, skb, 0);
1494                         break;
1495                 }
1496                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1497                         1);
1498                 if (ret) {
1499                         passive_open_err(cm_node, skb, 0);
1500                         /* drop pkt */
1501                         break;
1502                 }
1503                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1504                 BUG_ON(cm_node->send_entry);
1505                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1506                 send_syn(cm_node, 1, skb);
1507                 break;
1508         case NES_CM_STATE_TSA:
1509         case NES_CM_STATE_ESTABLISHED:
1510         case NES_CM_STATE_FIN_WAIT1:
1511         case NES_CM_STATE_FIN_WAIT2:
1512         case NES_CM_STATE_MPAREQ_RCVD:
1513         case NES_CM_STATE_LAST_ACK:
1514         case NES_CM_STATE_CLOSING:
1515         case NES_CM_STATE_UNKNOWN:
1516         case NES_CM_STATE_CLOSED:
1517         default:
1518                 drop_packet(skb);
1519                 break;
1520         }
1521 }
1522
1523 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1524         struct tcphdr *tcph)
1525 {
1526
1527         int ret;
1528         u32 inc_sequence;
1529         int optionsize;
1530
1531         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1532         skb_pull(skb, tcph->doff << 2);
1533         inc_sequence = ntohl(tcph->seq);
1534         switch (cm_node->state) {
1535         case NES_CM_STATE_SYN_SENT:
1536                 /* active open */
1537                 if (check_syn(cm_node, tcph, skb))
1538                         return;
1539                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1540                 /* setup options */
1541                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1542                 if (ret) {
1543                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1544                                 cm_node);
1545                         break;
1546                 }
1547                 cleanup_retrans_entry(cm_node);
1548                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1549                 send_mpa_request(cm_node, skb);
1550                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1551                 break;
1552         case NES_CM_STATE_MPAREQ_RCVD:
1553                 /* passive open, so should not be here */
1554                 passive_open_err(cm_node, skb, 1);
1555                 break;
1556         case NES_CM_STATE_ESTABLISHED:
1557         case NES_CM_STATE_FIN_WAIT1:
1558         case NES_CM_STATE_FIN_WAIT2:
1559         case NES_CM_STATE_LAST_ACK:
1560         case NES_CM_STATE_TSA:
1561         case NES_CM_STATE_CLOSING:
1562         case NES_CM_STATE_UNKNOWN:
1563         case NES_CM_STATE_CLOSED:
1564         case NES_CM_STATE_MPAREQ_SENT:
1565         default:
1566                 drop_packet(skb);
1567                 break;
1568         }
1569 }
1570
1571 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1572         struct tcphdr *tcph)
1573 {
1574         int datasize = 0;
1575         u32 inc_sequence;
1576         u32 rem_seq_ack;
1577         u32 rem_seq;
1578         if (check_seq(cm_node, tcph, skb))
1579                 return;
1580
1581         skb_pull(skb, tcph->doff << 2);
1582         inc_sequence = ntohl(tcph->seq);
1583         rem_seq = ntohl(tcph->seq);
1584         rem_seq_ack =  ntohl(tcph->ack_seq);
1585         datasize = skb->len;
1586
1587         switch (cm_node->state) {
1588         case NES_CM_STATE_SYN_RCVD:
1589                 /* Passive OPEN */
1590                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1591                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1592                 if (datasize) {
1593                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1594                         cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1595                         handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1596                  } else { /* rcvd ACK only */
1597                         dev_kfree_skb_any(skb);
1598                         cleanup_retrans_entry(cm_node);
1599                  }
1600                 break;
1601         case NES_CM_STATE_ESTABLISHED:
1602                 /* Passive OPEN */
1603                 /* We expect mpa frame to be received only */
1604                 if (datasize) {
1605                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1606                         cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1607                         handle_rcv_mpa(cm_node, skb,
1608                                 NES_CM_EVENT_MPA_REQ);
1609                 } else
1610                         drop_packet(skb);
1611                 break;
1612         case NES_CM_STATE_MPAREQ_SENT:
1613                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1614                 if (datasize) {
1615                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1616                         handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1617                 } else { /* Could be just an ack pkt.. */
1618                         cleanup_retrans_entry(cm_node);
1619                         dev_kfree_skb_any(skb);
1620                 }
1621                 break;
1622         case NES_CM_STATE_FIN_WAIT1:
1623         case NES_CM_STATE_SYN_SENT:
1624         case NES_CM_STATE_FIN_WAIT2:
1625         case NES_CM_STATE_TSA:
1626         case NES_CM_STATE_CLOSED:
1627         case NES_CM_STATE_MPAREQ_RCVD:
1628         case NES_CM_STATE_LAST_ACK:
1629         case NES_CM_STATE_CLOSING:
1630         case NES_CM_STATE_UNKNOWN:
1631         default:
1632                 drop_packet(skb);
1633                 break;
1634         }
1635 }
1636
1637
1638
1639 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1640         struct sk_buff *skb, int optionsize, int passive)
1641 {
1642         u8 *optionsloc = (u8 *)&tcph[1];
1643         if (optionsize) {
1644                 if (process_options(cm_node, optionsloc, optionsize,
1645                         (u32)tcph->syn)) {
1646                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1647                                 __func__, cm_node);
1648                         if (passive)
1649                                 passive_open_err(cm_node, skb, 0);
1650                         else
1651                                 active_open_err(cm_node, skb, 0);
1652                         return 1;
1653                 }
1654         }
1655
1656         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1657                         cm_node->tcp_cntxt.snd_wscale;
1658
1659         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1660                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1661         return 0;
1662 }
1663
1664 /*
1665  * active_open_err() will send reset() if flag set..
1666  * It will also send ABORT event.
1667  */
1668
1669 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1670         int reset)
1671 {
1672         cleanup_retrans_entry(cm_node);
1673         if (reset) {
1674                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1675                                 "state=%d\n", cm_node, cm_node->state);
1676                 add_ref_cm_node(cm_node);
1677                 send_reset(cm_node, skb);
1678         } else
1679                 dev_kfree_skb_any(skb);
1680
1681         cm_node->state = NES_CM_STATE_CLOSED;
1682         create_event(cm_node, NES_CM_EVENT_ABORTED);
1683 }
1684
1685 /*
1686  * passive_open_err() will either do a reset() or will free up the skb and
1687  * remove the cm_node.
1688  */
1689
1690 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1691         int reset)
1692 {
1693         cleanup_retrans_entry(cm_node);
1694         cm_node->state = NES_CM_STATE_CLOSED;
1695         if (reset) {
1696                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1697                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1698                 send_reset(cm_node, skb);
1699         } else {
1700                 dev_kfree_skb_any(skb);
1701                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1702         }
1703 }
1704
1705 /*
1706  * free_retrans_entry() routines assumes that the retrans_list_lock has
1707  * been acquired before calling.
1708  */
1709 static void free_retrans_entry(struct nes_cm_node *cm_node)
1710 {
1711         struct nes_timer_entry *send_entry;
1712         send_entry = cm_node->send_entry;
1713         if (send_entry) {
1714                 cm_node->send_entry = NULL;
1715                 dev_kfree_skb_any(send_entry->skb);
1716                 kfree(send_entry);
1717                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1718         }
1719 }
1720
1721 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1722 {
1723         unsigned long flags;
1724
1725         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1726         free_retrans_entry(cm_node);
1727         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1728 }
1729
1730 /**
1731  * process_packet
1732  * Returns skb if to be freed, else it will return NULL if already used..
1733  */
1734 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1735         struct nes_cm_core *cm_core)
1736 {
1737         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1738         struct tcphdr *tcph = tcp_hdr(skb);
1739         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1740
1741         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1742                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1743                 tcph->ack, tcph->rst, tcph->fin);
1744
1745         if (tcph->rst)
1746                 pkt_type = NES_PKT_TYPE_RST;
1747         else if (tcph->syn) {
1748                 pkt_type = NES_PKT_TYPE_SYN;
1749                 if (tcph->ack)
1750                         pkt_type = NES_PKT_TYPE_SYNACK;
1751         } else if (tcph->fin)
1752                 pkt_type = NES_PKT_TYPE_FIN;
1753         else if (tcph->ack)
1754                 pkt_type = NES_PKT_TYPE_ACK;
1755
1756         switch (pkt_type) {
1757         case NES_PKT_TYPE_SYN:
1758                 handle_syn_pkt(cm_node, skb, tcph);
1759                 break;
1760         case NES_PKT_TYPE_SYNACK:
1761                 handle_synack_pkt(cm_node, skb, tcph);
1762                 break;
1763         case NES_PKT_TYPE_ACK:
1764                 handle_ack_pkt(cm_node, skb, tcph);
1765                 break;
1766         case NES_PKT_TYPE_RST:
1767                 handle_rst_pkt(cm_node, skb, tcph);
1768                 break;
1769         case NES_PKT_TYPE_FIN:
1770                 handle_fin_pkt(cm_node, skb, tcph);
1771                 break;
1772         default:
1773                 drop_packet(skb);
1774                 break;
1775         }
1776 }
1777
1778 /**
1779  * mini_cm_listen - create a listen node with params
1780  */
1781 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1782         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1783 {
1784         struct nes_cm_listener *listener;
1785         unsigned long flags;
1786
1787         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1788                 cm_info->loc_addr, cm_info->loc_port);
1789
1790         /* cannot have multiple matching listeners */
1791         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1792                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1793         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1794                 /* find automatically incs ref count ??? */
1795                 atomic_dec(&listener->ref_count);
1796                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1797                 return NULL;
1798         }
1799
1800         if (!listener) {
1801                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1802                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1803                 if (!listener) {
1804                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1805                         return NULL;
1806                 }
1807
1808                 listener->loc_addr = htonl(cm_info->loc_addr);
1809                 listener->loc_port = htons(cm_info->loc_port);
1810                 listener->reused_node = 0;
1811
1812                 atomic_set(&listener->ref_count, 1);
1813         }
1814         /* pasive case */
1815         /* find already inc'ed the ref count */
1816         else {
1817                 listener->reused_node = 1;
1818         }
1819
1820         listener->cm_id = cm_info->cm_id;
1821         atomic_set(&listener->pend_accepts_cnt, 0);
1822         listener->cm_core = cm_core;
1823         listener->nesvnic = nesvnic;
1824         atomic_inc(&cm_core->node_cnt);
1825
1826         listener->conn_type = cm_info->conn_type;
1827         listener->backlog = cm_info->backlog;
1828         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1829
1830         if (!listener->reused_node) {
1831                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1832                 list_add(&listener->list, &cm_core->listen_list.list);
1833                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1834                 atomic_inc(&cm_core->listen_node_cnt);
1835         }
1836
1837         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1838                         " listener = %p, backlog = %d, cm_id = %p.\n",
1839                         cm_info->loc_addr, cm_info->loc_port,
1840                         listener, listener->backlog, listener->cm_id);
1841
1842         return listener;
1843 }
1844
1845
1846 /**
1847  * mini_cm_connect - make a connection node with params
1848  */
1849 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1850         struct nes_vnic *nesvnic, u16 private_data_len,
1851         void *private_data, struct nes_cm_info *cm_info)
1852 {
1853         int ret = 0;
1854         struct nes_cm_node *cm_node;
1855         struct nes_cm_listener *loopbackremotelistener;
1856         struct nes_cm_node *loopbackremotenode;
1857         struct nes_cm_info loopback_cm_info;
1858         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1859         struct ietf_mpa_frame *mpa_frame = NULL;
1860
1861         /* create a CM connection node */
1862         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1863         if (!cm_node)
1864                 return NULL;
1865         mpa_frame = &cm_node->mpa_frame;
1866         strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1867         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1868         mpa_frame->rev =  IETF_MPA_VERSION;
1869         mpa_frame->priv_data_len = htons(private_data_len);
1870
1871         /* set our node side to client (active) side */
1872         cm_node->tcp_cntxt.client = 1;
1873         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1874
1875         if (cm_info->loc_addr == cm_info->rem_addr) {
1876                 loopbackremotelistener = find_listener(cm_core,
1877                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1878                                 NES_CM_LISTENER_ACTIVE_STATE);
1879                 if (loopbackremotelistener == NULL) {
1880                         create_event(cm_node, NES_CM_EVENT_ABORTED);
1881                 } else {
1882                         atomic_inc(&cm_loopbacks);
1883                         loopback_cm_info = *cm_info;
1884                         loopback_cm_info.loc_port = cm_info->rem_port;
1885                         loopback_cm_info.rem_port = cm_info->loc_port;
1886                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1887                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
1888                                 &loopback_cm_info, loopbackremotelistener);
1889                         loopbackremotenode->loopbackpartner = cm_node;
1890                         loopbackremotenode->tcp_cntxt.rcv_wscale =
1891                                 NES_CM_DEFAULT_RCV_WND_SCALE;
1892                         cm_node->loopbackpartner = loopbackremotenode;
1893                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1894                                 private_data_len);
1895                         loopbackremotenode->mpa_frame_size = private_data_len;
1896
1897                         /* we are done handling this state. */
1898                         /* set node to a TSA state */
1899                         cm_node->state = NES_CM_STATE_TSA;
1900                         cm_node->tcp_cntxt.rcv_nxt =
1901                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
1902                         loopbackremotenode->tcp_cntxt.rcv_nxt =
1903                                 cm_node->tcp_cntxt.loc_seq_num;
1904                         cm_node->tcp_cntxt.max_snd_wnd =
1905                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
1906                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
1907                                 cm_node->tcp_cntxt.rcv_wnd;
1908                         cm_node->tcp_cntxt.snd_wnd =
1909                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
1910                         loopbackremotenode->tcp_cntxt.snd_wnd =
1911                                 cm_node->tcp_cntxt.rcv_wnd;
1912                         cm_node->tcp_cntxt.snd_wscale =
1913                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
1914                         loopbackremotenode->tcp_cntxt.snd_wscale =
1915                                 cm_node->tcp_cntxt.rcv_wscale;
1916
1917                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1918                 }
1919                 return cm_node;
1920         }
1921
1922         /* set our node side to client (active) side */
1923         cm_node->tcp_cntxt.client = 1;
1924         /* init our MPA frame ptr */
1925         memcpy(mpa_frame->priv_data, private_data, private_data_len);
1926
1927         cm_node->mpa_frame_size = mpa_frame_size;
1928
1929         /* send a syn and goto syn sent state */
1930         cm_node->state = NES_CM_STATE_SYN_SENT;
1931         ret = send_syn(cm_node, 0, NULL);
1932
1933         if (ret) {
1934                 /* error in sending the syn free up the cm_node struct */
1935                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
1936                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
1937                         cm_node->rem_addr, cm_node->rem_port, cm_node,
1938                         cm_node->cm_id);
1939                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1940                 cm_node = NULL;
1941         }
1942
1943         if (cm_node)
1944                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
1945                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
1946                         cm_node->rem_addr, cm_node->rem_port, cm_node,
1947                         cm_node->cm_id);
1948
1949         return cm_node;
1950 }
1951
1952
1953 /**
1954  * mini_cm_accept - accept a connection
1955  * This function is never called
1956  */
1957 static int mini_cm_accept(struct nes_cm_core *cm_core,
1958         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1959 {
1960         return 0;
1961 }
1962
1963
1964 /**
1965  * mini_cm_reject - reject and teardown a connection
1966  */
1967 static int mini_cm_reject(struct nes_cm_core *cm_core,
1968         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
1969 {
1970         int ret = 0;
1971
1972         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
1973                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
1974
1975         if (cm_node->tcp_cntxt.client)
1976                 return ret;
1977         cleanup_retrans_entry(cm_node);
1978         cm_node->state = NES_CM_STATE_CLOSED;
1979
1980         ret = send_reset(cm_node, NULL);
1981         return ret;
1982 }
1983
1984
1985 /**
1986  * mini_cm_close
1987  */
1988 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1989 {
1990         int ret = 0;
1991
1992         if (!cm_core || !cm_node)
1993                 return -EINVAL;
1994
1995         switch (cm_node->state) {
1996         case NES_CM_STATE_SYN_RCVD:
1997         case NES_CM_STATE_SYN_SENT:
1998         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
1999         case NES_CM_STATE_ESTABLISHED:
2000         case NES_CM_STATE_ACCEPTING:
2001         case NES_CM_STATE_MPAREQ_SENT:
2002         case NES_CM_STATE_MPAREQ_RCVD:
2003                 cleanup_retrans_entry(cm_node);
2004                 send_reset(cm_node, NULL);
2005                 break;
2006         case NES_CM_STATE_CLOSE_WAIT:
2007                 cm_node->state = NES_CM_STATE_LAST_ACK;
2008                 send_fin(cm_node, NULL);
2009                 break;
2010         case NES_CM_STATE_FIN_WAIT1:
2011         case NES_CM_STATE_FIN_WAIT2:
2012         case NES_CM_STATE_LAST_ACK:
2013         case NES_CM_STATE_TIME_WAIT:
2014         case NES_CM_STATE_CLOSING:
2015                 ret = -1;
2016                 break;
2017         case NES_CM_STATE_LISTENING:
2018         case NES_CM_STATE_UNKNOWN:
2019         case NES_CM_STATE_INITED:
2020         case NES_CM_STATE_CLOSED:
2021                 ret = rem_ref_cm_node(cm_core, cm_node);
2022                 break;
2023         case NES_CM_STATE_TSA:
2024                 if (cm_node->send_entry)
2025                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2026                                 "send_entry=%p\n", cm_node->send_entry);
2027                 ret = rem_ref_cm_node(cm_core, cm_node);
2028                 break;
2029         }
2030         return ret;
2031 }
2032
2033
2034 /**
2035  * recv_pkt - recv an ETHERNET packet, and process it through CM
2036  * node state machine
2037  */
2038 static void mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2039         struct nes_vnic *nesvnic, struct sk_buff *skb)
2040 {
2041         struct nes_cm_node *cm_node = NULL;
2042         struct nes_cm_listener *listener = NULL;
2043         struct iphdr *iph;
2044         struct tcphdr *tcph;
2045         struct nes_cm_info nfo;
2046
2047         if (!skb)
2048                 return;
2049         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2050                 dev_kfree_skb_any(skb);
2051                 return;
2052         }
2053
2054         iph = (struct iphdr *)skb->data;
2055         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2056         skb_reset_network_header(skb);
2057         skb_set_transport_header(skb, sizeof(*tcph));
2058         if (!tcph) {
2059                 dev_kfree_skb_any(skb);
2060                 return;
2061         }
2062         skb->len = ntohs(iph->tot_len);
2063
2064         nfo.loc_addr = ntohl(iph->daddr);
2065         nfo.loc_port = ntohs(tcph->dest);
2066         nfo.rem_addr = ntohl(iph->saddr);
2067         nfo.rem_port = ntohs(tcph->source);
2068
2069         nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
2070                   ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
2071                   NIPQUAD(iph->daddr), tcph->dest,
2072                   NIPQUAD(iph->saddr), tcph->source);
2073
2074         do {
2075                 cm_node = find_node(cm_core,
2076                         nfo.rem_port, nfo.rem_addr,
2077                         nfo.loc_port, nfo.loc_addr);
2078
2079                 if (!cm_node) {
2080                         /* Only type of packet accepted are for */
2081                         /* the PASSIVE open (syn only) */
2082                         if ((!tcph->syn) || (tcph->ack)) {
2083                                 cm_packets_dropped++;
2084                                 break;
2085                         }
2086                         listener = find_listener(cm_core, nfo.loc_addr,
2087                                 nfo.loc_port,
2088                                 NES_CM_LISTENER_ACTIVE_STATE);
2089                         if (listener) {
2090                                 nfo.cm_id = listener->cm_id;
2091                                 nfo.conn_type = listener->conn_type;
2092                         } else {
2093                                 nes_debug(NES_DBG_CM, "Unable to find listener "
2094                                         "for the pkt\n");
2095                                 cm_packets_dropped++;
2096                                 dev_kfree_skb_any(skb);
2097                                 break;
2098                         }
2099
2100                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2101                                 listener);
2102                         if (!cm_node) {
2103                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2104                                         "node\n");
2105                                 cm_packets_dropped++;
2106                                 atomic_dec(&listener->ref_count);
2107                                 dev_kfree_skb_any(skb);
2108                                 break;
2109                         }
2110                         if (!tcph->rst && !tcph->fin) {
2111                                 cm_node->state = NES_CM_STATE_LISTENING;
2112                         } else {
2113                                 cm_packets_dropped++;
2114                                 rem_ref_cm_node(cm_core, cm_node);
2115                                 dev_kfree_skb_any(skb);
2116                                 break;
2117                         }
2118                         add_ref_cm_node(cm_node);
2119                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2120                         rem_ref_cm_node(cm_core, cm_node);
2121                         atomic_inc(&cm_accel_dropped_pkts);
2122                         dev_kfree_skb_any(skb);
2123                         break;
2124                 }
2125                 process_packet(cm_node, skb, cm_core);
2126                 rem_ref_cm_node(cm_core, cm_node);
2127         } while (0);
2128 }
2129
2130
2131 /**
2132  * nes_cm_alloc_core - allocate a top level instance of a cm core
2133  */
2134 static struct nes_cm_core *nes_cm_alloc_core(void)
2135 {
2136         int i;
2137
2138         struct nes_cm_core *cm_core;
2139         struct sk_buff *skb = NULL;
2140
2141         /* setup the CM core */
2142         /* alloc top level core control structure */
2143         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2144         if (!cm_core)
2145                 return NULL;
2146
2147         INIT_LIST_HEAD(&cm_core->connected_nodes);
2148         init_timer(&cm_core->tcp_timer);
2149         cm_core->tcp_timer.function = nes_cm_timer_tick;
2150
2151         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2152         cm_core->state = NES_CM_STATE_INITED;
2153         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2154
2155         atomic_set(&cm_core->events_posted, 0);
2156
2157         /* init the packet lists */
2158         skb_queue_head_init(&cm_core->tx_free_list);
2159
2160         for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
2161                 skb = dev_alloc_skb(cm_core->mtu);
2162                 if (!skb) {
2163                         kfree(cm_core);
2164                         return NULL;
2165                 }
2166                 /* add 'raw' skb to free frame list */
2167                 skb_queue_head(&cm_core->tx_free_list, skb);
2168         }
2169
2170         cm_core->api = &nes_cm_api;
2171
2172         spin_lock_init(&cm_core->ht_lock);
2173         spin_lock_init(&cm_core->listen_list_lock);
2174
2175         INIT_LIST_HEAD(&cm_core->listen_list.list);
2176
2177         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2178
2179         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2180         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2181         cm_core->post_event = nes_cm_post_event;
2182         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2183         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2184
2185         print_core(cm_core);
2186         return cm_core;
2187 }
2188
2189
2190 /**
2191  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2192  */
2193 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2194 {
2195         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2196
2197         if (!cm_core)
2198                 return -EINVAL;
2199
2200         barrier();
2201
2202         if (timer_pending(&cm_core->tcp_timer)) {
2203                 del_timer(&cm_core->tcp_timer);
2204         }
2205
2206         destroy_workqueue(cm_core->event_wq);
2207         destroy_workqueue(cm_core->disconn_wq);
2208         nes_debug(NES_DBG_CM, "\n");
2209         kfree(cm_core);
2210
2211         return 0;
2212 }
2213
2214
2215 /**
2216  * mini_cm_get
2217  */
2218 static int mini_cm_get(struct nes_cm_core *cm_core)
2219 {
2220         return cm_core->state;
2221 }
2222
2223
2224 /**
2225  * mini_cm_set
2226  */
2227 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2228 {
2229         int ret = 0;
2230
2231         switch (type) {
2232                 case NES_CM_SET_PKT_SIZE:
2233                         cm_core->mtu = value;
2234                         break;
2235                 case NES_CM_SET_FREE_PKT_Q_SIZE:
2236                         cm_core->free_tx_pkt_max = value;
2237                         break;
2238                 default:
2239                         /* unknown set option */
2240                         ret = -EINVAL;
2241         }
2242
2243         return ret;
2244 }
2245
2246
2247 /**
2248  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2249  * successfully exchanged when this is called
2250  */
2251 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2252 {
2253         int ret = 0;
2254
2255         if (!nesqp)
2256                 return -EINVAL;
2257
2258         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2259                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2260                         NES_QPCONTEXT_MISC_DROS);
2261
2262         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2263                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2264
2265         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2266
2267         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2268
2269         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2270                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2271
2272         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2273                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2274                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2275
2276         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2277                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2278                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2279
2280         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2281         nesqp->nesqp_context->ts_recent = 0;
2282         nesqp->nesqp_context->ts_age = 0;
2283         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2284         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2285         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2286         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2287                         cm_node->tcp_cntxt.rcv_wscale);
2288         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2289         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2290         nesqp->nesqp_context->srtt = 0;
2291         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2292         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2293         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2294         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2295         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2296         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2297
2298         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2299                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2300                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2301                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2302                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2303                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2304                         le32_to_cpu(nesqp->nesqp_context->misc));
2305         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2306         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2307         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2308
2309         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2310         cm_node->state = NES_CM_STATE_TSA;
2311
2312         return ret;
2313 }
2314
2315
2316 /**
2317  * nes_cm_disconn
2318  */
2319 int nes_cm_disconn(struct nes_qp *nesqp)
2320 {
2321         unsigned long flags;
2322
2323         spin_lock_irqsave(&nesqp->lock, flags);
2324         if (nesqp->disconn_pending == 0) {
2325                 nesqp->disconn_pending++;
2326                 spin_unlock_irqrestore(&nesqp->lock, flags);
2327                 /* init our disconnect work element, to */
2328                 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2329
2330                 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2331         } else
2332                 spin_unlock_irqrestore(&nesqp->lock, flags);
2333
2334         return 0;
2335 }
2336
2337
2338 /**
2339  * nes_disconnect_worker
2340  */
2341 static void nes_disconnect_worker(struct work_struct *work)
2342 {
2343         struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2344
2345         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2346                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2347         nes_cm_disconn_true(nesqp);
2348 }
2349
2350
2351 /**
2352  * nes_cm_disconn_true
2353  */
2354 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2355 {
2356         unsigned long flags;
2357         int ret = 0;
2358         struct iw_cm_id *cm_id;
2359         struct iw_cm_event cm_event;
2360         struct nes_vnic *nesvnic;
2361         u16 last_ae;
2362         u8 original_hw_tcp_state;
2363         u8 original_ibqp_state;
2364         u8 issued_disconnect_reset = 0;
2365
2366         if (!nesqp) {
2367                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2368                 return -1;
2369         }
2370
2371         spin_lock_irqsave(&nesqp->lock, flags);
2372         cm_id = nesqp->cm_id;
2373         /* make sure we havent already closed this connection */
2374         if (!cm_id) {
2375                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2376                                 nesqp->hwqp.qp_id);
2377                 spin_unlock_irqrestore(&nesqp->lock, flags);
2378                 return -1;
2379         }
2380
2381         nesvnic = to_nesvnic(nesqp->ibqp.device);
2382         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2383
2384         original_hw_tcp_state = nesqp->hw_tcp_state;
2385         original_ibqp_state   = nesqp->ibqp_state;
2386         last_ae = nesqp->last_aeq;
2387
2388
2389         nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2390
2391         if ((nesqp->cm_id) && (cm_id->event_handler)) {
2392                 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2393                                 ((original_ibqp_state == IB_QPS_RTS) &&
2394                                 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2395                         atomic_inc(&cm_disconnects);
2396                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2397                         if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2398                                 issued_disconnect_reset = 1;
2399                                 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2400                                 nes_debug(NES_DBG_CM, "Generating a CM "
2401                                         "Disconnect Event (status reset) for "
2402                                         "QP%u, cm_id = %p. \n",
2403                                         nesqp->hwqp.qp_id, cm_id);
2404                         } else
2405                                 cm_event.status = IW_CM_EVENT_STATUS_OK;
2406
2407                         cm_event.local_addr = cm_id->local_addr;
2408                         cm_event.remote_addr = cm_id->remote_addr;
2409                         cm_event.private_data = NULL;
2410                         cm_event.private_data_len = 0;
2411
2412                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2413                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2414                                 "cm_id = %p, refcount = %u.\n",
2415                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2416                                 nesqp->hwqp.sq_tail, cm_id,
2417                                 atomic_read(&nesqp->refcount));
2418
2419                         spin_unlock_irqrestore(&nesqp->lock, flags);
2420                         ret = cm_id->event_handler(cm_id, &cm_event);
2421                         if (ret)
2422                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2423                                         "returned, ret=%d\n", ret);
2424                         spin_lock_irqsave(&nesqp->lock, flags);
2425                 }
2426
2427                 nesqp->disconn_pending = 0;
2428                 /* There might have been another AE while the lock was released */
2429                 original_hw_tcp_state = nesqp->hw_tcp_state;
2430                 original_ibqp_state   = nesqp->ibqp_state;
2431                 last_ae = nesqp->last_aeq;
2432
2433                 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2434                                 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2435                                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2436                                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2437                                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2438                         atomic_inc(&cm_closes);
2439                         nesqp->cm_id = NULL;
2440                         nesqp->in_disconnect = 0;
2441                         spin_unlock_irqrestore(&nesqp->lock, flags);
2442                         nes_disconnect(nesqp, 1);
2443
2444                         cm_id->provider_data = nesqp;
2445                         /* Send up the close complete event */
2446                         cm_event.event = IW_CM_EVENT_CLOSE;
2447                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2448                         cm_event.provider_data = cm_id->provider_data;
2449                         cm_event.local_addr = cm_id->local_addr;
2450                         cm_event.remote_addr = cm_id->remote_addr;
2451                         cm_event.private_data = NULL;
2452                         cm_event.private_data_len = 0;
2453
2454                         ret = cm_id->event_handler(cm_id, &cm_event);
2455                         if (ret) {
2456                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2457                         }
2458
2459                         cm_id->rem_ref(cm_id);
2460
2461                         spin_lock_irqsave(&nesqp->lock, flags);
2462                         if (nesqp->flush_issued == 0) {
2463                                 nesqp->flush_issued = 1;
2464                                 spin_unlock_irqrestore(&nesqp->lock, flags);
2465                                 flush_wqes(nesvnic->nesdev, nesqp,
2466                                         NES_CQP_FLUSH_RQ, 1);
2467                         } else
2468                                 spin_unlock_irqrestore(&nesqp->lock, flags);
2469                 } else {
2470                         cm_id = nesqp->cm_id;
2471                         spin_unlock_irqrestore(&nesqp->lock, flags);
2472                         /* check to see if the inbound reset beat the outbound reset */
2473                         if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2474                                 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2475                                         "due to inbound reset beating the "
2476                                         "outbound reset.\n", nesqp->hwqp.qp_id);
2477                         }
2478                 }
2479         } else {
2480                 nesqp->disconn_pending = 0;
2481                 spin_unlock_irqrestore(&nesqp->lock, flags);
2482         }
2483
2484         return 0;
2485 }
2486
2487
2488 /**
2489  * nes_disconnect
2490  */
2491 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2492 {
2493         int ret = 0;
2494         struct nes_vnic *nesvnic;
2495         struct nes_device *nesdev;
2496
2497         nesvnic = to_nesvnic(nesqp->ibqp.device);
2498         if (!nesvnic)
2499                 return -EINVAL;
2500
2501         nesdev = nesvnic->nesdev;
2502
2503         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2504                         atomic_read(&nesvnic->netdev->refcnt));
2505
2506         if (nesqp->active_conn) {
2507
2508                 /* indicate this connection is NOT active */
2509                 nesqp->active_conn = 0;
2510         } else {
2511                 /* Need to free the Last Streaming Mode Message */
2512                 if (nesqp->ietf_frame) {
2513                         pci_free_consistent(nesdev->pcidev,
2514                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2515                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2516                 }
2517         }
2518
2519         /* close the CM node down if it is still active */
2520         if (nesqp->cm_node) {
2521                 nes_debug(NES_DBG_CM, "Call close API\n");
2522
2523                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2524         }
2525
2526         return ret;
2527 }
2528
2529
2530 /**
2531  * nes_accept
2532  */
2533 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2534 {
2535         u64 u64temp;
2536         struct ib_qp *ibqp;
2537         struct nes_qp *nesqp;
2538         struct nes_vnic *nesvnic;
2539         struct nes_device *nesdev;
2540         struct nes_cm_node *cm_node;
2541         struct nes_adapter *adapter;
2542         struct ib_qp_attr attr;
2543         struct iw_cm_event cm_event;
2544         struct nes_hw_qp_wqe *wqe;
2545         struct nes_v4_quad nes_quad;
2546         u32 crc_value;
2547         int ret;
2548
2549         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2550         if (!ibqp)
2551                 return -EINVAL;
2552
2553         /* get all our handles */
2554         nesqp = to_nesqp(ibqp);
2555         nesvnic = to_nesvnic(nesqp->ibqp.device);
2556         nesdev = nesvnic->nesdev;
2557         adapter = nesdev->nesadapter;
2558
2559         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2560         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2561                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2562                 nesvnic->netdev->name);
2563
2564         /* associate the node with the QP */
2565         nesqp->cm_node = (void *)cm_node;
2566         cm_node->nesqp = nesqp;
2567         nes_add_ref(&nesqp->ibqp);
2568
2569         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2570                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2571         atomic_inc(&cm_accepts);
2572
2573         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2574                         atomic_read(&nesvnic->netdev->refcnt));
2575
2576         /* allocate the ietf frame and space for private data */
2577         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2578                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2579                 &nesqp->ietf_frame_pbase);
2580
2581         if (!nesqp->ietf_frame) {
2582                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2583                         "data\n");
2584                 return -ENOMEM;
2585         }
2586
2587
2588         /* setup the MPA frame */
2589         nesqp->private_data_len = conn_param->private_data_len;
2590         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2591
2592         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2593                         conn_param->private_data_len);
2594
2595         nesqp->ietf_frame->priv_data_len =
2596                 cpu_to_be16(conn_param->private_data_len);
2597         nesqp->ietf_frame->rev = mpa_version;
2598         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2599
2600         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2601         wqe = &nesqp->hwqp.sq_vbase[0];
2602
2603         if (cm_id->remote_addr.sin_addr.s_addr !=
2604                         cm_id->local_addr.sin_addr.s_addr) {
2605                 u64temp = (unsigned long)nesqp;
2606                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2607                 set_wqe_64bit_value(wqe->wqe_words,
2608                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2609                         u64temp);
2610                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2611                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2612                         NES_IWARP_SQ_WQE_WRPDU);
2613                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2614                         cpu_to_le32(conn_param->private_data_len +
2615                         sizeof(struct ietf_mpa_frame));
2616                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2617                         cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2618                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2619                         cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2620                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2621                         cpu_to_le32(conn_param->private_data_len +
2622                         sizeof(struct ietf_mpa_frame));
2623                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2624
2625                 nesqp->nesqp_context->ird_ord_sizes |=
2626                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2627                         NES_QPCONTEXT_ORDIRD_WRPDU);
2628         } else {
2629                 nesqp->nesqp_context->ird_ord_sizes |=
2630                         cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2631                         NES_QPCONTEXT_ORDIRD_WRPDU |
2632                         NES_QPCONTEXT_ORDIRD_ALSMM));
2633         }
2634         nesqp->skip_lsmm = 1;
2635
2636
2637         /* Cache the cm_id in the qp */
2638         nesqp->cm_id = cm_id;
2639         cm_node->cm_id = cm_id;
2640
2641         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2642         cm_id->provider_data = nesqp;
2643         nesqp->active_conn   = 0;
2644
2645         if (cm_node->state == NES_CM_STATE_TSA)
2646                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2647                         cm_node);
2648
2649         nes_cm_init_tsa_conn(nesqp, cm_node);
2650
2651         nesqp->nesqp_context->tcpPorts[0] =
2652                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2653         nesqp->nesqp_context->tcpPorts[1] =
2654                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2655
2656         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2657                 nesqp->nesqp_context->ip0 =
2658                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2659         else
2660                 nesqp->nesqp_context->ip0 =
2661                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2662
2663         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2664                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2665                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2666
2667         nesqp->nesqp_context->arp_index_vlan |=
2668                 cpu_to_le32(nes_arp_table(nesdev,
2669                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2670                         NES_ARP_RESOLVE) << 16);
2671
2672         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2673                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2674
2675         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2676
2677         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2678                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2679         nesqp->nesqp_context->ird_ord_sizes |=
2680                 cpu_to_le32((u32)conn_param->ord);
2681
2682         memset(&nes_quad, 0, sizeof(nes_quad));
2683         nes_quad.DstIpAdrIndex =
2684                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2685         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2686                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2687         else
2688                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2689         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2690         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2691
2692         /* Produce hash key */
2693         crc_value = get_crc_value(&nes_quad);
2694         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2695         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2696                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2697
2698         nesqp->hte_index &= adapter->hte_index_mask;
2699         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2700
2701         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2702
2703         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2704                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2705                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2706                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2707                         ntohs(cm_id->remote_addr.sin_port),
2708                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2709                         ntohs(cm_id->local_addr.sin_port),
2710                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2711                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2712                         conn_param->private_data_len +
2713                         sizeof(struct ietf_mpa_frame));
2714
2715         attr.qp_state = IB_QPS_RTS;
2716         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2717
2718         /* notify OF layer that accept event was successfull */
2719         cm_id->add_ref(cm_id);
2720
2721         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2722         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2723         cm_event.provider_data = (void *)nesqp;
2724         cm_event.local_addr = cm_id->local_addr;
2725         cm_event.remote_addr = cm_id->remote_addr;
2726         cm_event.private_data = NULL;
2727         cm_event.private_data_len = 0;
2728         ret = cm_id->event_handler(cm_id, &cm_event);
2729         if (cm_node->loopbackpartner) {
2730                 cm_node->loopbackpartner->mpa_frame_size =
2731                         nesqp->private_data_len;
2732                 /* copy entire MPA frame to our cm_node's frame */
2733                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2734                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2735                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2736         }
2737         if (ret)
2738                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2739                         "ret=%d\n", __func__, __LINE__, ret);
2740
2741         return 0;
2742 }
2743
2744
2745 /**
2746  * nes_reject
2747  */
2748 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2749 {
2750         struct nes_cm_node *cm_node;
2751         struct nes_cm_core *cm_core;
2752
2753         atomic_inc(&cm_rejects);
2754         cm_node = (struct nes_cm_node *) cm_id->provider_data;
2755         cm_core = cm_node->cm_core;
2756         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2757
2758         strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2759         memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2760
2761         cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2762         cm_node->mpa_frame.rev = mpa_version;
2763         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2764
2765         cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2766
2767         return 0;
2768 }
2769
2770
2771 /**
2772  * nes_connect
2773  * setup and launch cm connect node
2774  */
2775 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2776 {
2777         struct ib_qp *ibqp;
2778         struct nes_qp *nesqp;
2779         struct nes_vnic *nesvnic;
2780         struct nes_device *nesdev;
2781         struct nes_cm_node *cm_node;
2782         struct nes_cm_info cm_info;
2783
2784         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2785         if (!ibqp)
2786                 return -EINVAL;
2787         nesqp = to_nesqp(ibqp);
2788         if (!nesqp)
2789                 return -EINVAL;
2790         nesvnic = to_nesvnic(nesqp->ibqp.device);
2791         if (!nesvnic)
2792                 return -EINVAL;
2793         nesdev  = nesvnic->nesdev;
2794         if (!nesdev)
2795                 return -EINVAL;
2796
2797         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2798                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2799                 ntohl(nesvnic->local_ipaddr),
2800                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2801                 ntohs(cm_id->remote_addr.sin_port),
2802                 ntohl(cm_id->local_addr.sin_addr.s_addr),
2803                 ntohs(cm_id->local_addr.sin_port));
2804
2805         atomic_inc(&cm_connects);
2806         nesqp->active_conn = 1;
2807
2808         /* cache the cm_id in the qp */
2809         nesqp->cm_id = cm_id;
2810
2811         cm_id->provider_data = nesqp;
2812
2813         nesqp->private_data_len = conn_param->private_data_len;
2814         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2815         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2816         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2817                 conn_param->private_data_len);
2818
2819         if (cm_id->local_addr.sin_addr.s_addr !=
2820                 cm_id->remote_addr.sin_addr.s_addr)
2821                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2822                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2823
2824         /* set up the connection params for the node */
2825         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2826         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2827         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2828         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2829         cm_info.cm_id = cm_id;
2830         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2831
2832         cm_id->add_ref(cm_id);
2833
2834         /* create a connect CM node connection */
2835         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2836                 conn_param->private_data_len, (void *)conn_param->private_data,
2837                 &cm_info);
2838         if (!cm_node) {
2839                 if (cm_id->local_addr.sin_addr.s_addr !=
2840                                 cm_id->remote_addr.sin_addr.s_addr)
2841                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2842                                 PCI_FUNC(nesdev->pcidev->devfn),
2843                                 NES_MANAGE_APBVT_DEL);
2844
2845                 cm_id->rem_ref(cm_id);
2846                 return -ENOMEM;
2847         }
2848
2849         cm_node->apbvt_set = 1;
2850         nesqp->cm_node = cm_node;
2851         cm_node->nesqp = nesqp;
2852         nes_add_ref(&nesqp->ibqp);
2853
2854         return 0;
2855 }
2856
2857
2858 /**
2859  * nes_create_listen
2860  */
2861 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2862 {
2863         struct nes_vnic *nesvnic;
2864         struct nes_cm_listener *cm_node;
2865         struct nes_cm_info cm_info;
2866         struct nes_adapter *adapter;
2867         int err;
2868
2869
2870         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2871                         cm_id, ntohs(cm_id->local_addr.sin_port));
2872
2873         nesvnic = to_nesvnic(cm_id->device);
2874         if (!nesvnic)
2875                 return -EINVAL;
2876         adapter = nesvnic->nesdev->nesadapter;
2877         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2878                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2879
2880         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2881                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2882
2883         /* setup listen params in our api call struct */
2884         cm_info.loc_addr = nesvnic->local_ipaddr;
2885         cm_info.loc_port = cm_id->local_addr.sin_port;
2886         cm_info.backlog = backlog;
2887         cm_info.cm_id = cm_id;
2888
2889         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2890
2891
2892         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2893         if (!cm_node) {
2894                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2895                                 __func__, __LINE__);
2896                 return -ENOMEM;
2897         }
2898
2899         cm_id->provider_data = cm_node;
2900
2901         if (!cm_node->reused_node) {
2902                 err = nes_manage_apbvt(nesvnic,
2903                         ntohs(cm_id->local_addr.sin_port),
2904                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2905                         NES_MANAGE_APBVT_ADD);
2906                 if (err) {
2907                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2908                                 err);
2909                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2910                         return err;
2911                 }
2912                 cm_listens_created++;
2913         }
2914
2915         cm_id->add_ref(cm_id);
2916         cm_id->provider_data = (void *)cm_node;
2917
2918
2919         return 0;
2920 }
2921
2922
2923 /**
2924  * nes_destroy_listen
2925  */
2926 int nes_destroy_listen(struct iw_cm_id *cm_id)
2927 {
2928         if (cm_id->provider_data)
2929                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2930         else
2931                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
2932
2933         cm_id->rem_ref(cm_id);
2934
2935         return 0;
2936 }
2937
2938
2939 /**
2940  * nes_cm_recv
2941  */
2942 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
2943 {
2944         cm_packets_received++;
2945         if ((g_cm_core) && (g_cm_core->api)) {
2946                 g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
2947         } else {
2948                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
2949                                 " cm is not setup properly.\n");
2950         }
2951
2952         return 0;
2953 }
2954
2955
2956 /**
2957  * nes_cm_start
2958  * Start and init a cm core module
2959  */
2960 int nes_cm_start(void)
2961 {
2962         nes_debug(NES_DBG_CM, "\n");
2963         /* create the primary CM core, pass this handle to subsequent core inits */
2964         g_cm_core = nes_cm_alloc_core();
2965         if (g_cm_core) {
2966                 return 0;
2967         } else {
2968                 return -ENOMEM;
2969         }
2970 }
2971
2972
2973 /**
2974  * nes_cm_stop
2975  * stop and dealloc all cm core instances
2976  */
2977 int nes_cm_stop(void)
2978 {
2979         g_cm_core->api->destroy_cm_core(g_cm_core);
2980         return 0;
2981 }
2982
2983
2984 /**
2985  * cm_event_connected
2986  * handle a connected event, setup QPs and HW
2987  */
2988 static void cm_event_connected(struct nes_cm_event *event)
2989 {
2990         u64 u64temp;
2991         struct nes_qp *nesqp;
2992         struct nes_vnic *nesvnic;
2993         struct nes_device *nesdev;
2994         struct nes_cm_node *cm_node;
2995         struct nes_adapter *nesadapter;
2996         struct ib_qp_attr attr;
2997         struct iw_cm_id *cm_id;
2998         struct iw_cm_event cm_event;
2999         struct nes_hw_qp_wqe *wqe;
3000         struct nes_v4_quad nes_quad;
3001         u32 crc_value;
3002         int ret;
3003
3004         /* get all our handles */
3005         cm_node = event->cm_node;
3006         cm_id = cm_node->cm_id;
3007         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3008         nesqp = (struct nes_qp *)cm_id->provider_data;
3009         nesvnic = to_nesvnic(nesqp->ibqp.device);
3010         nesdev = nesvnic->nesdev;
3011         nesadapter = nesdev->nesadapter;
3012
3013         if (nesqp->destroyed) {
3014                 return;
3015         }
3016         atomic_inc(&cm_connecteds);
3017         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3018                         " local port 0x%04X. jiffies = %lu.\n",
3019                         nesqp->hwqp.qp_id,
3020                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3021                         ntohs(cm_id->remote_addr.sin_port),
3022                         ntohs(cm_id->local_addr.sin_port),
3023                         jiffies);
3024
3025         nes_cm_init_tsa_conn(nesqp, cm_node);
3026
3027         /* set the QP tsa context */
3028         nesqp->nesqp_context->tcpPorts[0] =
3029                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3030         nesqp->nesqp_context->tcpPorts[1] =
3031                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3032         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3033                 nesqp->nesqp_context->ip0 =
3034                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3035         else
3036                 nesqp->nesqp_context->ip0 =
3037                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3038
3039         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3040                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3041                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3042         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3043                         nes_arp_table(nesdev,
3044                         le32_to_cpu(nesqp->nesqp_context->ip0),
3045                         NULL, NES_ARP_RESOLVE) << 16);
3046         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3047                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3048         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3049         nesqp->nesqp_context->ird_ord_sizes |=
3050                         cpu_to_le32((u32)1 <<
3051                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3052
3053         /* Adjust tail for not having a LSMM */
3054         nesqp->hwqp.sq_tail = 1;
3055
3056 #if defined(NES_SEND_FIRST_WRITE)
3057         if (cm_node->send_write0) {
3058                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3059                 wqe = &nesqp->hwqp.sq_vbase[0];
3060                 u64temp = (unsigned long)nesqp;
3061                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3062                 set_wqe_64bit_value(wqe->wqe_words,
3063                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3064                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3065                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3066                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3067                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3068                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3069                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3070                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3071
3072                 /* use the reserved spot on the WQ for the extra first WQE */
3073                 nesqp->nesqp_context->ird_ord_sizes &=
3074                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3075                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3076                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3077                 nesqp->skip_lsmm = 1;
3078                 nesqp->hwqp.sq_tail = 0;
3079                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3080                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3081         }
3082 #endif
3083
3084         memset(&nes_quad, 0, sizeof(nes_quad));
3085
3086         nes_quad.DstIpAdrIndex =
3087                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3088         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3089                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3090         else
3091                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3092         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3093         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3094
3095         /* Produce hash key */
3096         crc_value = get_crc_value(&nes_quad);
3097         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3098         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3099                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3100
3101         nesqp->hte_index &= nesadapter->hte_index_mask;
3102         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3103
3104         nesqp->ietf_frame = &cm_node->mpa_frame;
3105         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3106         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3107
3108         /* notify OF layer we successfully created the requested connection */
3109         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3110         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3111         cm_event.provider_data = cm_id->provider_data;
3112         cm_event.local_addr.sin_family = AF_INET;
3113         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3114         cm_event.remote_addr = cm_id->remote_addr;
3115
3116         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3117         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3118
3119         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3120         ret = cm_id->event_handler(cm_id, &cm_event);
3121         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3122
3123         if (ret)
3124                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3125                         "ret=%d\n", __func__, __LINE__, ret);
3126         attr.qp_state = IB_QPS_RTS;
3127         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3128
3129         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3130                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3131
3132         return;
3133 }
3134
3135
3136 /**
3137  * cm_event_connect_error
3138  */
3139 static void cm_event_connect_error(struct nes_cm_event *event)
3140 {
3141         struct nes_qp *nesqp;
3142         struct iw_cm_id *cm_id;
3143         struct iw_cm_event cm_event;
3144         /* struct nes_cm_info cm_info; */
3145         int ret;
3146
3147         if (!event->cm_node)
3148                 return;
3149
3150         cm_id = event->cm_node->cm_id;
3151         if (!cm_id) {
3152                 return;
3153         }
3154
3155         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3156         nesqp = cm_id->provider_data;
3157
3158         if (!nesqp) {
3159                 return;
3160         }
3161
3162         /* notify OF layer about this connection error event */
3163         /* cm_id->rem_ref(cm_id); */
3164         nesqp->cm_id = NULL;
3165         cm_id->provider_data = NULL;
3166         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3167         cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3168         cm_event.provider_data = cm_id->provider_data;
3169         cm_event.local_addr = cm_id->local_addr;
3170         cm_event.remote_addr = cm_id->remote_addr;
3171         cm_event.private_data = NULL;
3172         cm_event.private_data_len = 0;
3173
3174         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3175                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3176                 cm_event.remote_addr.sin_addr.s_addr);
3177
3178         ret = cm_id->event_handler(cm_id, &cm_event);
3179         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3180         if (ret)
3181                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3182                         "ret=%d\n", __func__, __LINE__, ret);
3183         cm_id->rem_ref(cm_id);
3184
3185         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3186         return;
3187 }
3188
3189
3190 /**
3191  * cm_event_reset
3192  */
3193 static void cm_event_reset(struct nes_cm_event *event)
3194 {
3195         struct nes_qp *nesqp;
3196         struct iw_cm_id *cm_id;
3197         struct iw_cm_event cm_event;
3198         /* struct nes_cm_info cm_info; */
3199         int ret;
3200
3201         if (!event->cm_node)
3202                 return;
3203
3204         if (!event->cm_node->cm_id)
3205                 return;
3206
3207         cm_id = event->cm_node->cm_id;
3208
3209         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3210         nesqp = cm_id->provider_data;
3211
3212         nesqp->cm_id = NULL;
3213         /* cm_id->provider_data = NULL; */
3214         cm_event.event = IW_CM_EVENT_DISCONNECT;
3215         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3216         cm_event.provider_data = cm_id->provider_data;
3217         cm_event.local_addr = cm_id->local_addr;
3218         cm_event.remote_addr = cm_id->remote_addr;
3219         cm_event.private_data = NULL;
3220         cm_event.private_data_len = 0;
3221
3222         ret = cm_id->event_handler(cm_id, &cm_event);
3223         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3224
3225
3226         /* notify OF layer about this connection error event */
3227         cm_id->rem_ref(cm_id);
3228
3229         return;
3230 }
3231
3232
3233 /**
3234  * cm_event_mpa_req
3235  */
3236 static void cm_event_mpa_req(struct nes_cm_event *event)
3237 {
3238         struct iw_cm_id   *cm_id;
3239         struct iw_cm_event cm_event;
3240         int ret;
3241         struct nes_cm_node *cm_node;
3242
3243         cm_node = event->cm_node;
3244         if (!cm_node)
3245                 return;
3246         cm_id = cm_node->cm_id;
3247
3248         atomic_inc(&cm_connect_reqs);
3249         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3250                         cm_node, cm_id, jiffies);
3251
3252         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3253         cm_event.status = IW_CM_EVENT_STATUS_OK;
3254         cm_event.provider_data = (void *)cm_node;
3255
3256         cm_event.local_addr.sin_family = AF_INET;
3257         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3258         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3259
3260         cm_event.remote_addr.sin_family = AF_INET;
3261         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3262         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3263
3264                 cm_event.private_data                = cm_node->mpa_frame_buf;
3265                 cm_event.private_data_len            = (u8) cm_node->mpa_frame_size;
3266
3267         ret = cm_id->event_handler(cm_id, &cm_event);
3268         if (ret)
3269                 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3270                                 __func__, __LINE__, ret);
3271
3272         return;
3273 }
3274
3275
3276 static void nes_cm_event_handler(struct work_struct *);
3277
3278 /**
3279  * nes_cm_post_event
3280  * post an event to the cm event handler
3281  */
3282 static int nes_cm_post_event(struct nes_cm_event *event)
3283 {
3284         atomic_inc(&event->cm_node->cm_core->events_posted);
3285         add_ref_cm_node(event->cm_node);
3286         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3287         INIT_WORK(&event->event_work, nes_cm_event_handler);
3288         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3289                 event->cm_node, event);
3290
3291         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3292
3293         nes_debug(NES_DBG_CM, "Exit\n");
3294         return 0;
3295 }
3296
3297
3298 /**
3299  * nes_cm_event_handler
3300  * worker function to handle cm events
3301  * will free instance of nes_cm_event
3302  */
3303 static void nes_cm_event_handler(struct work_struct *work)
3304 {
3305         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3306                         event_work);
3307         struct nes_cm_core *cm_core;
3308
3309         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3310                 return;
3311
3312         cm_core = event->cm_node->cm_core;
3313         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3314                 event, event->type, atomic_read(&cm_core->events_posted));
3315
3316         switch (event->type) {
3317         case NES_CM_EVENT_MPA_REQ:
3318                 cm_event_mpa_req(event);
3319                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3320                         event->cm_node);
3321                 break;
3322         case NES_CM_EVENT_RESET:
3323                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3324                         event->cm_node);
3325                 cm_event_reset(event);
3326                 break;
3327         case NES_CM_EVENT_CONNECTED:
3328                 if ((!event->cm_node->cm_id) ||
3329                         (event->cm_node->state != NES_CM_STATE_TSA))
3330                         break;
3331                 cm_event_connected(event);
3332                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3333                 break;
3334         case NES_CM_EVENT_ABORTED:
3335                 if ((!event->cm_node->cm_id) ||
3336                         (event->cm_node->state == NES_CM_STATE_TSA))
3337                         break;
3338                 cm_event_connect_error(event);
3339                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3340                 break;
3341         case NES_CM_EVENT_DROPPED_PKT:
3342                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3343                 break;
3344         default:
3345                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3346                 break;
3347         }
3348
3349         atomic_dec(&cm_core->events_posted);
3350         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3351         rem_ref_cm_node(cm_core, event->cm_node);
3352         kfree(event);
3353
3354         return;
3355 }