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 int 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         struct list_head timer_list;
 463         INIT_LIST_HEAD(&timer_list);
 464         spin_lock_irqsave(&cm_core->ht_lock, flags);
 465
 466         list_for_each_safe(list_node, list_core_temp,
 467                                 &cm_core->connected_nodes) {
 468                 cm_node = container_of(list_node, struct nes_cm_node, list);
 469                 if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) {
 470                         add_ref_cm_node(cm_node);
 471                         list_add(&cm_node->timer_entry, &timer_list);
 472                 }
 473         }
 474         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 475
 476         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 477                 cm_node = container_of(list_node, struct nes_cm_node,
 478                                         timer_entry);
 479                 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
 480                 list_for_each_safe(list_core, list_node_temp,
 481                         &cm_node->recv_list) {
 482                         recv_entry = container_of(list_core,
 483                                 struct nes_timer_entry, list);
 484                         if (!recv_entry)
 485                                 break;
 486                         if (time_after(recv_entry->timetosend, jiffies)) {
 487                                 if (nexttimeout > recv_entry->timetosend ||
 488                                         !settimer) {
 489                                         nexttimeout = recv_entry->timetosend;
 490                                         settimer = 1;
 491                                 }
 492                                 continue;
 493                         }
 494                         list_del(&recv_entry->list);
 495                         cm_id = cm_node->cm_id;
 496                         spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
 497                         nesqp = (struct nes_qp *)recv_entry->skb;
 498                         spin_lock_irqsave(&nesqp->lock, qplockflags);
 499                         if (nesqp->cm_id) {
 500                                 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 501                                         "refcount = %d: HIT A "
 502                                         "NES_TIMER_TYPE_CLOSE with something "
 503                                         "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 504                                         atomic_read(&nesqp->refcount));
 505                                 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 506                                 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 507                                 nesqp->ibqp_state = IB_QPS_ERR;
 508                                 spin_unlock_irqrestore(&nesqp->lock,
 509                                         qplockflags);
 510                                 nes_cm_disconn(nesqp);
 511                         } else {
 512                                 spin_unlock_irqrestore(&nesqp->lock,
 513                                         qplockflags);
 514                                 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 515                                         "refcount = %d: HIT A "
 516                                         "NES_TIMER_TYPE_CLOSE with nothing "
 517                                         "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 518                                         atomic_read(&nesqp->refcount));
 519                         }
 520                         if (cm_id)
 521                                 cm_id->rem_ref(cm_id);
 522
 523                         kfree(recv_entry);
 524                         spin_lock_irqsave(&cm_node->recv_list_lock, flags);
 525                 }
 526                 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
 527
 528                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 529                 do {
 530                         send_entry = cm_node->send_entry;
 531                         if (!send_entry)
 532                                 break;
 533                         if (time_after(send_entry->timetosend, jiffies)) {
 534                                 if (cm_node->state != NES_CM_STATE_TSA) {
 535                                         if ((nexttimeout >
 536                                                 send_entry->timetosend) ||
 537                                                 !settimer) {
 538                                                 nexttimeout =
 539                                                         send_entry->timetosend;
 540                                                 settimer = 1;
 541                                                 break;
 542                                         }
 543                                 } else {
 544                                         free_retrans_entry(cm_node);
 545                                         break;
 546                                 }
 547                         }
 548
 549                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 550                                 (cm_node->state == NES_CM_STATE_CLOSED)) {
 551                                 free_retrans_entry(cm_node);
 552                                 break;
 553                         }
 554
 555                         if (!send_entry->retranscount ||
 556                                 !send_entry->retrycount) {
 557                                 cm_packets_dropped++;
 558                                 last_state = cm_node->state;
 559                                 cm_node->state = NES_CM_STATE_CLOSED;
 560                                 free_retrans_entry(cm_node);
 561                                 spin_unlock_irqrestore(
 562                                         &cm_node->retrans_list_lock, flags);
 563                                 if (last_state == NES_CM_STATE_SYN_RCVD)
 564                                         rem_ref_cm_node(cm_core, cm_node);
 565                                 else
 566                                         create_event(cm_node,
 567                                                 NES_CM_EVENT_ABORTED);
 568                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 569                                         flags);
 570                                 break;
 571                         }
 572                         atomic_inc(&send_entry->skb->users);
 573                         cm_packets_retrans++;
 574                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 575                                 "for node %p, jiffies = %lu, time to send = "
 576                                 "%lu, retranscount = %u, send_entry->seq_num = "
 577                                 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 578                                 "0x%08X\n", send_entry, cm_node, jiffies,
 579                                 send_entry->timetosend,
 580                                 send_entry->retranscount,
 581                                 send_entry->seq_num,
 582                                 cm_node->tcp_cntxt.rem_ack_num);
 583
 584                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 585                                 flags);
 586                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 587                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 588                         if (ret != NETDEV_TX_OK) {
 589                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 590                                         "node=%p\n", cm_node);
 591                                 cm_packets_bounced++;
 592                                 atomic_dec(&send_entry->skb->users);
 593                                 send_entry->retrycount--;
 594                                 nexttimeout = jiffies + NES_SHORT_TIME;
 595                                 settimer = 1;
 596                                 break;
 597                         } else {
 598                                 cm_packets_sent++;
 599                         }
 600                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 601                                 "%u, retry count = %u.\n",
 602                                 send_entry->retranscount,
 603                                 send_entry->retrycount);
 604                         if (send_entry->send_retrans) {
 605                                 send_entry->retranscount--;
 606                                 send_entry->timetosend = jiffies +
 607                                         NES_RETRY_TIMEOUT;
 608                                 if (nexttimeout > send_entry->timetosend ||
 609                                         !settimer) {
 610                                         nexttimeout = send_entry->timetosend;
 611                                         settimer = 1;
 612                                 }
 613                         } else {
 614                                 int close_when_complete;
 615                                 close_when_complete =
 616                                         send_entry->close_when_complete;
 617                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 618                                         cm_node, cm_node->state);
 619                                 free_retrans_entry(cm_node);
 620                                 if (close_when_complete)
 621                                         rem_ref_cm_node(cm_node->cm_core,
 622                                                 cm_node);
 623                         }
 624                 } while (0);
 625
 626                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 627                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 628                 if (ret != NETDEV_TX_OK) {
 629                         nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
 630                                 cm_node);
 631                         break;
 632                 }
 633         }
 634
 635         if (settimer) {
 636                 if (!timer_pending(&cm_core->tcp_timer)) {
 637                         cm_core->tcp_timer.expires  = nexttimeout;
 638                         add_timer(&cm_core->tcp_timer);
 639                 }
 640         }
 641 }
 642
 643
 644 /**
 645  * send_syn
 646  */
 647 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 648         struct sk_buff *skb)
 649 {
 650         int ret;
 651         int flags = SET_SYN;
 652         char optionsbuffer[sizeof(struct option_mss) +
 653                 sizeof(struct option_windowscale) + sizeof(struct option_base) +
 654                 TCP_OPTIONS_PADDING];
 655
 656         int optionssize = 0;
 657         /* Sending MSS option */
 658         union all_known_options *options;
 659
 660         if (!cm_node)
 661                 return -EINVAL;
 662
 663         options = (union all_known_options *)&optionsbuffer[optionssize];
 664         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 665         options->as_mss.length = sizeof(struct option_mss);
 666         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 667         optionssize += sizeof(struct option_mss);
 668
 669         options = (union all_known_options *)&optionsbuffer[optionssize];
 670         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 671         options->as_windowscale.length = sizeof(struct option_windowscale);
 672         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 673         optionssize += sizeof(struct option_windowscale);
 674
 675         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 676                 options = (union all_known_options *)&optionsbuffer[optionssize];
 677                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 678                 options->as_base.length = sizeof(struct option_base);
 679                 optionssize += sizeof(struct option_base);
 680                 /* we need the size to be a multiple of 4 */
 681                 options = (union all_known_options *)&optionsbuffer[optionssize];
 682                 options->as_end = 1;
 683                 optionssize += 1;
 684                 options = (union all_known_options *)&optionsbuffer[optionssize];
 685                 options->as_end = 1;
 686                 optionssize += 1;
 687         }
 688
 689         options = (union all_known_options *)&optionsbuffer[optionssize];
 690         options->as_end = OPTION_NUMBER_END;
 691         optionssize += 1;
 692
 693         if (!skb)
 694                 skb = get_free_pkt(cm_node);
 695         if (!skb) {
 696                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 697                 return -1;
 698         }
 699
 700         if (sendack)
 701                 flags |= SET_ACK;
 702
 703         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
 704         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 705
 706         return ret;
 707 }
 708
 709
 710 /**
 711  * send_reset
 712  */
 713 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
 714 {
 715         int ret;
 716         int flags = SET_RST | SET_ACK;
 717
 718         if (!skb)
 719                 skb = get_free_pkt(cm_node);
 720         if (!skb) {
 721                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 722                 return -1;
 723         }
 724
 725         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
 726         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
 727
 728         return ret;
 729 }
 730
 731
 732 /**
 733  * send_ack
 734  */
 735 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
 736 {
 737         int ret;
 738
 739         if (!skb)
 740                 skb = get_free_pkt(cm_node);
 741
 742         if (!skb) {
 743                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 744                 return -1;
 745         }
 746
 747         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
 748         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
 749
 750         return ret;
 751 }
 752
 753
 754 /**
 755  * send_fin
 756  */
 757 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
 758 {
 759         int ret;
 760
 761         /* if we didn't get a frame get one */
 762         if (!skb)
 763                 skb = get_free_pkt(cm_node);
 764
 765         if (!skb) {
 766                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 767                 return -1;
 768         }
 769
 770         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
 771         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 772
 773         return ret;
 774 }
 775
 776
 777 /**
 778  * get_free_pkt
 779  */
 780 static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node)
 781 {
 782         struct sk_buff *skb, *new_skb;
 783
 784         /* check to see if we need to repopulate the free tx pkt queue */
 785         if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) {
 786                 while (skb_queue_len(&cm_node->cm_core->tx_free_list) <
 787                                 cm_node->cm_core->free_tx_pkt_max) {
 788                         /* replace the frame we took, we won't get it back */
 789                         new_skb = dev_alloc_skb(cm_node->cm_core->mtu);
 790                         BUG_ON(!new_skb);
 791                         /* add a replacement frame to the free tx list head */
 792                         skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb);
 793                 }
 794         }
 795
 796         skb = skb_dequeue(&cm_node->cm_core->tx_free_list);
 797
 798         return skb;
 799 }
 800
 801
 802 /**
 803  * make_hashkey - generate hash key from node tuple
 804  */
 805 static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port,
 806                 nes_addr_t rem_addr)
 807 {
 808         u32 hashkey = 0;
 809
 810         hashkey = loc_addr + rem_addr + loc_port + rem_port;
 811         hashkey = (hashkey % NES_CM_HASHTABLE_SIZE);
 812
 813         return hashkey;
 814 }
 815
 816
 817 /**
 818  * find_node - find a cm node that matches the reference cm node
 819  */
 820 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
 821                 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
 822 {
 823         unsigned long flags;
 824         u32 hashkey;
 825         struct list_head *hte;
 826         struct nes_cm_node *cm_node;
 827
 828         /* make a hash index key for this packet */
 829         hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr);
 830
 831         /* get a handle on the hte */
 832         hte = &cm_core->connected_nodes;
 833
 834         nes_debug(NES_DBG_CM, "Searching for an owner node: " NIPQUAD_FMT ":%x from core %p->%p\n",
 835                   HIPQUAD(loc_addr), loc_port, cm_core, hte);
 836
 837         /* walk list and find cm_node associated with this session ID */
 838         spin_lock_irqsave(&cm_core->ht_lock, flags);
 839         list_for_each_entry(cm_node, hte, list) {
 840                 /* compare quad, return node handle if a match */
 841                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
 842                                 cm_node->loc_addr, cm_node->loc_port,
 843                                 loc_addr, loc_port,
 844                                 cm_node->rem_addr, cm_node->rem_port,
 845                                 rem_addr, rem_port);
 846                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
 847                                 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
 848                         add_ref_cm_node(cm_node);
 849                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 850                         return cm_node;
 851                 }
 852         }
 853         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 854
 855         /* no owner node */
 856         return NULL;
 857 }
 858
 859
 860 /**
 861  * find_listener - find a cm node listening on this addr-port pair
 862  */
 863 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
 864                 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
 865 {
 866         unsigned long flags;
 867         struct nes_cm_listener *listen_node;
 868
 869         /* walk list and find cm_node associated with this session ID */
 870         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
 871         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
 872                 /* compare node pair, return node handle if a match */
 873                 if (((listen_node->loc_addr == dst_addr) ||
 874                                 listen_node->loc_addr == 0x00000000) &&
 875                                 (listen_node->loc_port == dst_port) &&
 876                                 (listener_state & listen_node->listener_state)) {
 877                         atomic_inc(&listen_node->ref_count);
 878                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 879                         return listen_node;
 880                 }
 881         }
 882         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 883
 884         nes_debug(NES_DBG_CM, "Unable to find listener for " NIPQUAD_FMT ":%x\n",
 885                   HIPQUAD(dst_addr), dst_port);
 886
 887         /* no listener */
 888         return NULL;
 889 }
 890
 891
 892 /**
 893  * add_hte_node - add a cm node to the hash table
 894  */
 895 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
 896 {
 897         unsigned long flags;
 898         u32 hashkey;
 899         struct list_head *hte;
 900
 901         if (!cm_node || !cm_core)
 902                 return -EINVAL;
 903
 904         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
 905                 cm_node);
 906
 907         /* first, make an index into our hash table */
 908         hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr,
 909                         cm_node->rem_port, cm_node->rem_addr);
 910         cm_node->hashkey = hashkey;
 911
 912         spin_lock_irqsave(&cm_core->ht_lock, flags);
 913
 914         /* get a handle on the hash table element (list head for this slot) */
 915         hte = &cm_core->connected_nodes;
 916         list_add_tail(&cm_node->list, hte);
 917         atomic_inc(&cm_core->ht_node_cnt);
 918
 919         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 920
 921         return 0;
 922 }
 923
 924
 925 /**
 926  * mini_cm_dec_refcnt_listen
 927  */
 928 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
 929         struct nes_cm_listener *listener, int free_hanging_nodes)
 930 {
 931         int ret = 1;
 932         unsigned long flags;
 933         struct list_head *list_pos = NULL;
 934         struct list_head *list_temp = NULL;
 935         struct nes_cm_node *cm_node = NULL;
 936         struct list_head reset_list;
 937
 938         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
 939                 "refcnt=%d\n", listener, free_hanging_nodes,
 940                 atomic_read(&listener->ref_count));
 941         /* free non-accelerated child nodes for this listener */
 942         INIT_LIST_HEAD(&reset_list);
 943         if (free_hanging_nodes) {
 944                 spin_lock_irqsave(&cm_core->ht_lock, flags);
 945                 list_for_each_safe(list_pos, list_temp,
 946                                    &g_cm_core->connected_nodes) {
 947                         cm_node = container_of(list_pos, struct nes_cm_node,
 948                                 list);
 949                         if ((cm_node->listener == listener) &&
 950                             (!cm_node->accelerated)) {
 951                                 add_ref_cm_node(cm_node);
 952                                 list_add(&cm_node->reset_entry, &reset_list);
 953                         }
 954                 }
 955                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 956         }
 957
 958         list_for_each_safe(list_pos, list_temp, &reset_list) {
 959                 cm_node = container_of(list_pos, struct nes_cm_node,
 960                                         reset_entry);
 961                 cleanup_retrans_entry(cm_node);
 962                 send_reset(cm_node, NULL);
 963                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 964         }
 965
 966         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
 967         if (!atomic_dec_return(&listener->ref_count)) {
 968                 list_del(&listener->list);
 969
 970                 /* decrement our listen node count */
 971                 atomic_dec(&cm_core->listen_node_cnt);
 972
 973                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 974
 975                 if (listener->nesvnic) {
 976                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
 977                                         PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
 978                 }
 979
 980                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
 981
 982                 kfree(listener);
 983                 listener = NULL;
 984                 ret = 0;
 985                 cm_listens_destroyed++;
 986         } else {
 987                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 988         }
 989         if (listener) {
 990                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
 991                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
 992                                         " with non-zero pending accepts=%u\n",
 993                                         listener, atomic_read(&listener->pend_accepts_cnt));
 994         }
 995
 996         return ret;
 997 }
 998
 999
1000 /**
1001  * mini_cm_del_listen
1002  */
1003 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1004                 struct nes_cm_listener *listener)
1005 {
1006         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1007         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1008         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1009 }
1010
1011
1012 /**
1013  * mini_cm_accelerated
1014  */
1015 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1016                 struct nes_cm_node *cm_node)
1017 {
1018         u32 was_timer_set;
1019         cm_node->accelerated = 1;
1020
1021         if (cm_node->accept_pend) {
1022                 BUG_ON(!cm_node->listener);
1023                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1024                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1025         }
1026
1027         was_timer_set = timer_pending(&cm_core->tcp_timer);
1028         if (!was_timer_set) {
1029                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1030                 add_timer(&cm_core->tcp_timer);
1031         }
1032
1033         return 0;
1034 }
1035
1036
1037 /**
1038  * nes_addr_resolve_neigh
1039  */
1040 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
1041 {
1042         struct rtable *rt;
1043         struct flowi fl;
1044         struct neighbour *neigh;
1045         int rc = -1;
1046         DECLARE_MAC_BUF(mac);
1047
1048         memset(&fl, 0, sizeof fl);
1049         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1050         if (ip_route_output_key(&init_net, &rt, &fl)) {
1051                 printk("%s: ip_route_output_key failed for 0x%08X\n",
1052                                 __func__, dst_ip);
1053                 return rc;
1054         }
1055
1056         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1057         if (neigh) {
1058                 if (neigh->nud_state & NUD_VALID) {
1059                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1060                                   " is %s, Gateway is 0x%08X \n", dst_ip,
1061                                   print_mac(mac, neigh->ha), ntohl(rt->rt_gateway));
1062                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1063                                              dst_ip, NES_ARP_ADD);
1064                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1065                                            NES_ARP_RESOLVE);
1066                 }
1067                 neigh_release(neigh);
1068         }
1069
1070         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1071                 neigh_event_send(rt->u.dst.neighbour, NULL);
1072
1073         ip_rt_put(rt);
1074         return rc;
1075 }
1076
1077
1078 /**
1079  * make_cm_node - create a new instance of a cm node
1080  */
1081 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1082                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1083                 struct nes_cm_listener *listener)
1084 {
1085         struct nes_cm_node *cm_node;
1086         struct timespec ts;
1087         int arpindex = 0;
1088         struct nes_device *nesdev;
1089         struct nes_adapter *nesadapter;
1090         DECLARE_MAC_BUF(mac);
1091
1092         /* create an hte and cm_node for this instance */
1093         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1094         if (!cm_node)
1095                 return NULL;
1096
1097         /* set our node specific transport info */
1098         cm_node->loc_addr = cm_info->loc_addr;
1099         cm_node->rem_addr = cm_info->rem_addr;
1100         cm_node->loc_port = cm_info->loc_port;
1101         cm_node->rem_port = cm_info->rem_port;
1102         cm_node->send_write0 = send_first;
1103         nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT
1104                         ":%x, rem = " NIPQUAD_FMT ":%x\n",
1105                         HIPQUAD(cm_node->loc_addr), cm_node->loc_port,
1106                         HIPQUAD(cm_node->rem_addr), cm_node->rem_port);
1107         cm_node->listener = listener;
1108         cm_node->netdev = nesvnic->netdev;
1109         cm_node->cm_id = cm_info->cm_id;
1110         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1111
1112         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1113                         cm_node->cm_id);
1114
1115         spin_lock_init(&cm_node->retrans_list_lock);
1116         INIT_LIST_HEAD(&cm_node->recv_list);
1117         spin_lock_init(&cm_node->recv_list_lock);
1118
1119         cm_node->loopbackpartner = NULL;
1120         atomic_set(&cm_node->ref_count, 1);
1121         /* associate our parent CM core */
1122         cm_node->cm_core = cm_core;
1123         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1124         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1125         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1126                         NES_CM_DEFAULT_RCV_WND_SCALE;
1127         ts = current_kernel_time();
1128         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1129         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1130                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1131         cm_node->tcp_cntxt.rcv_nxt = 0;
1132         /* get a unique session ID , add thread_id to an upcounter to handle race */
1133         atomic_inc(&cm_core->node_cnt);
1134         cm_node->conn_type = cm_info->conn_type;
1135         cm_node->apbvt_set = 0;
1136         cm_node->accept_pend = 0;
1137
1138         cm_node->nesvnic = nesvnic;
1139         /* get some device handles, for arp lookup */
1140         nesdev = nesvnic->nesdev;
1141         nesadapter = nesdev->nesadapter;
1142
1143         cm_node->loopbackpartner = NULL;
1144         /* get the mac addr for the remote node */
1145         arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1146         if (arpindex < 0) {
1147                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
1148                 if (arpindex < 0) {
1149                         kfree(cm_node);
1150                         return NULL;
1151                 }
1152         }
1153
1154         /* copy the mac addr to node context */
1155         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1156         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %s\n",
1157                   print_mac(mac, cm_node->rem_mac));
1158
1159         add_hte_node(cm_core, cm_node);
1160         atomic_inc(&cm_nodes_created);
1161
1162         return cm_node;
1163 }
1164
1165
1166 /**
1167  * add_ref_cm_node - destroy an instance of a cm node
1168  */
1169 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1170 {
1171         atomic_inc(&cm_node->ref_count);
1172         return 0;
1173 }
1174
1175
1176 /**
1177  * rem_ref_cm_node - destroy an instance of a cm node
1178  */
1179 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1180         struct nes_cm_node *cm_node)
1181 {
1182         unsigned long flags, qplockflags;
1183         struct nes_timer_entry *recv_entry;
1184         struct iw_cm_id *cm_id;
1185         struct list_head *list_core, *list_node_temp;
1186         struct nes_qp *nesqp;
1187
1188         if (!cm_node)
1189                 return -EINVAL;
1190
1191         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1192         if (atomic_dec_return(&cm_node->ref_count)) {
1193                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1194                 return 0;
1195         }
1196         list_del(&cm_node->list);
1197         atomic_dec(&cm_core->ht_node_cnt);
1198         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1199
1200         /* if the node is destroyed before connection was accelerated */
1201         if (!cm_node->accelerated && cm_node->accept_pend) {
1202                 BUG_ON(!cm_node->listener);
1203                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1204                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1205         }
1206         BUG_ON(cm_node->send_entry);
1207         spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1208         list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
1209                 recv_entry = container_of(list_core, struct nes_timer_entry,
1210                                 list);
1211                 list_del(&recv_entry->list);
1212                 cm_id = cm_node->cm_id;
1213                 spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1214                 nesqp = (struct nes_qp *)recv_entry->skb;
1215                 spin_lock_irqsave(&nesqp->lock, qplockflags);
1216                 if (nesqp->cm_id) {
1217                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1218                                 "NES_TIMER_TYPE_CLOSE with something to do!\n",
1219                                 nesqp->hwqp.qp_id, cm_id);
1220                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
1221                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
1222                         nesqp->ibqp_state = IB_QPS_ERR;
1223                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1224                         nes_cm_disconn(nesqp);
1225                 } else {
1226                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
1227                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
1228                                 "NES_TIMER_TYPE_CLOSE with nothing to do!\n",
1229                                 nesqp->hwqp.qp_id, cm_id);
1230                 }
1231                 cm_id->rem_ref(cm_id);
1232
1233                 kfree(recv_entry);
1234                 spin_lock_irqsave(&cm_node->recv_list_lock, flags);
1235         }
1236         spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
1237
1238         if (cm_node->listener) {
1239                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1240         } else {
1241                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1242                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1243                                 PCI_FUNC(
1244                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1245                                 NES_MANAGE_APBVT_DEL);
1246                 }
1247         }
1248
1249         atomic_dec(&cm_core->node_cnt);
1250         atomic_inc(&cm_nodes_destroyed);
1251         nesqp = cm_node->nesqp;
1252         if (nesqp) {
1253                 nesqp->cm_node = NULL;
1254                 nes_rem_ref(&nesqp->ibqp);
1255                 cm_node->nesqp = NULL;
1256         }
1257
1258         cm_node->freed = 1;
1259         kfree(cm_node);
1260         return 0;
1261 }
1262
1263 /**
1264  * process_options
1265  */
1266 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1267         u32 optionsize, u32 syn_packet)
1268 {
1269         u32 tmp;
1270         u32 offset = 0;
1271         union all_known_options *all_options;
1272         char got_mss_option = 0;
1273
1274         while (offset < optionsize) {
1275                 all_options = (union all_known_options *)(optionsloc + offset);
1276                 switch (all_options->as_base.optionnum) {
1277                 case OPTION_NUMBER_END:
1278                         offset = optionsize;
1279                         break;
1280                 case OPTION_NUMBER_NONE:
1281                         offset += 1;
1282                         continue;
1283                 case OPTION_NUMBER_MSS:
1284                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1285                                 "Size: %d\n", __func__,
1286                                 all_options->as_mss.length, offset, optionsize);
1287                         got_mss_option = 1;
1288                         if (all_options->as_mss.length != 4) {
1289                                 return 1;
1290                         } else {
1291                                 tmp = ntohs(all_options->as_mss.mss);
1292                                 if (tmp > 0 && tmp <
1293                                         cm_node->tcp_cntxt.mss)
1294                                         cm_node->tcp_cntxt.mss = tmp;
1295                         }
1296                         break;
1297                 case OPTION_NUMBER_WINDOW_SCALE:
1298                         cm_node->tcp_cntxt.snd_wscale =
1299                                 all_options->as_windowscale.shiftcount;
1300                         break;
1301                 case OPTION_NUMBER_WRITE0:
1302                         cm_node->send_write0 = 1;
1303                         break;
1304                 default:
1305                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1306                                 all_options->as_base.optionnum);
1307                         break;
1308                 }
1309                 offset += all_options->as_base.length;
1310         }
1311         if ((!got_mss_option) && (syn_packet))
1312                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1313         return 0;
1314 }
1315
1316 static void drop_packet(struct sk_buff *skb)
1317 {
1318         atomic_inc(&cm_accel_dropped_pkts);
1319         dev_kfree_skb_any(skb);
1320 }
1321
1322 static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1323         struct tcphdr *tcph)
1324 {
1325         atomic_inc(&cm_resets_recvd);
1326         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1327                 "refcnt=%d\n", cm_node, cm_node->state,
1328                 atomic_read(&cm_node->ref_count));
1329         cm_node->tcp_cntxt.rcv_nxt++;
1330         cleanup_retrans_entry(cm_node);
1331         switch (cm_node->state) {
1332         case NES_CM_STATE_SYN_RCVD:
1333         case NES_CM_STATE_SYN_SENT:
1334         case NES_CM_STATE_ESTABLISHED:
1335         case NES_CM_STATE_MPAREQ_SENT:
1336                 cm_node->state = NES_CM_STATE_LAST_ACK;
1337                 send_fin(cm_node, skb);
1338                 break;
1339         case NES_CM_STATE_FIN_WAIT1:
1340                 cm_node->state = NES_CM_STATE_CLOSING;
1341                 send_ack(cm_node, skb);
1342                 break;
1343         case NES_CM_STATE_FIN_WAIT2:
1344                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1345                 send_ack(cm_node, skb);
1346                 cm_node->state = NES_CM_STATE_CLOSED;
1347                 break;
1348         case NES_CM_STATE_TSA:
1349         default:
1350                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1351                         cm_node, cm_node->state);
1352                 drop_packet(skb);
1353                 break;
1354         }
1355 }
1356
1357
1358 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1359         struct tcphdr *tcph)
1360 {
1361
1362         int     reset = 0;      /* whether to send reset in case of err.. */
1363         int     passive_state;
1364         atomic_inc(&cm_resets_recvd);
1365         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1366                         " refcnt=%d\n", cm_node, cm_node->state,
1367                         atomic_read(&cm_node->ref_count));
1368         cleanup_retrans_entry(cm_node);
1369         switch (cm_node->state) {
1370         case NES_CM_STATE_SYN_SENT:
1371         case NES_CM_STATE_MPAREQ_SENT:
1372                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1373                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1374                         cm_node->listener, cm_node->state);
1375                 active_open_err(cm_node, skb, reset);
1376                 break;
1377         case NES_CM_STATE_MPAREQ_RCVD:
1378                 passive_state = atomic_add_return(1, &cm_node->passive_state);
1379                 if (passive_state ==  NES_SEND_RESET_EVENT)
1380                         create_event(cm_node, NES_CM_EVENT_RESET);
1381                 cleanup_retrans_entry(cm_node);
1382                 cm_node->state = NES_CM_STATE_CLOSED;
1383                 dev_kfree_skb_any(skb);
1384                 break;
1385         case NES_CM_STATE_ESTABLISHED:
1386         case NES_CM_STATE_SYN_RCVD:
1387         case NES_CM_STATE_LISTENING:
1388                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1389                 passive_open_err(cm_node, skb, reset);
1390                 break;
1391         case NES_CM_STATE_TSA:
1392                 active_open_err(cm_node, skb, reset);
1393                 break;
1394         case NES_CM_STATE_CLOSED:
1395                 cleanup_retrans_entry(cm_node);
1396                 drop_packet(skb);
1397                 break;
1398         default:
1399                 drop_packet(skb);
1400                 break;
1401         }
1402 }
1403
1404 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
1405         enum nes_cm_event_type type)
1406 {
1407
1408         int     ret;
1409         int datasize = skb->len;
1410         u8 *dataloc = skb->data;
1411         ret = parse_mpa(cm_node, dataloc, datasize);
1412         if (ret < 0) {
1413                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1414                 if (type == NES_CM_EVENT_CONNECTED) {
1415                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1416                                 "cm_node=%p listener=%p state=%d\n", __func__,
1417                                 __LINE__, cm_node, cm_node->listener,
1418                                 cm_node->state);
1419                         active_open_err(cm_node, skb, 1);
1420                 } else {
1421                         passive_open_err(cm_node, skb, 1);
1422                 }
1423         } else {
1424                 cleanup_retrans_entry(cm_node);
1425                 dev_kfree_skb_any(skb);
1426                 if (type == NES_CM_EVENT_CONNECTED)
1427                         cm_node->state = NES_CM_STATE_TSA;
1428                 else
1429                         atomic_set(&cm_node->passive_state,
1430                                         NES_PASSIVE_STATE_INDICATED);
1431                 create_event(cm_node, type);
1432
1433         }
1434         return ;
1435 }
1436
1437 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1438 {
1439         switch (cm_node->state) {
1440         case NES_CM_STATE_SYN_SENT:
1441         case NES_CM_STATE_MPAREQ_SENT:
1442                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1443                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1444                         cm_node->listener, cm_node->state);
1445                 active_open_err(cm_node, skb, 1);
1446                 break;
1447         case NES_CM_STATE_ESTABLISHED:
1448         case NES_CM_STATE_SYN_RCVD:
1449                 passive_open_err(cm_node, skb, 1);
1450                 break;
1451         case NES_CM_STATE_TSA:
1452         default:
1453                 drop_packet(skb);
1454         }
1455 }
1456
1457 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1458         struct sk_buff *skb)
1459 {
1460         int err;
1461
1462         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1463         if (err)
1464                 active_open_err(cm_node, skb, 1);
1465
1466         return err;
1467 }
1468
1469 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1470         struct sk_buff *skb)
1471 {
1472         int err = 0;
1473         u32 seq;
1474         u32 ack_seq;
1475         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1476         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1477         u32 rcv_wnd;
1478         seq = ntohl(tcph->seq);
1479         ack_seq = ntohl(tcph->ack_seq);
1480         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1481         if (ack_seq != loc_seq_num)
1482                 err = 1;
1483         else if ((seq + rcv_wnd) < rcv_nxt)
1484                 err = 1;
1485         if (err) {
1486                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1487                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1488                         cm_node->listener, cm_node->state);
1489                 indicate_pkt_err(cm_node, skb);
1490                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1491                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1492                         rcv_wnd);
1493         }
1494         return err;
1495 }
1496
1497 /*
1498  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1499  * is created with a listener or it may comein as rexmitted packet which in
1500  * that case will be just dropped.
1501  */
1502
1503 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1504         struct tcphdr *tcph)
1505 {
1506         int ret;
1507         u32 inc_sequence;
1508         int optionsize;
1509
1510         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1511         skb_trim(skb, 0);
1512         inc_sequence = ntohl(tcph->seq);
1513
1514         switch (cm_node->state) {
1515         case NES_CM_STATE_SYN_SENT:
1516         case NES_CM_STATE_MPAREQ_SENT:
1517                 /* Rcvd syn on active open connection*/
1518                 active_open_err(cm_node, skb, 1);
1519                 break;
1520         case NES_CM_STATE_LISTENING:
1521                 /* Passive OPEN */
1522                 cm_node->accept_pend = 1;
1523                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1524                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1525                                 cm_node->listener->backlog) {
1526                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1527                                 "pressure \n");
1528                         cm_backlog_drops++;
1529                         passive_open_err(cm_node, skb, 0);
1530                         break;
1531                 }
1532                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1533                         1);
1534                 if (ret) {
1535                         passive_open_err(cm_node, skb, 0);
1536                         /* drop pkt */
1537                         break;
1538                 }
1539                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1540                 BUG_ON(cm_node->send_entry);
1541                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1542                 send_syn(cm_node, 1, skb);
1543                 break;
1544         case NES_CM_STATE_CLOSED:
1545                 cleanup_retrans_entry(cm_node);
1546                 send_reset(cm_node, skb);
1547                 break;
1548         case NES_CM_STATE_TSA:
1549         case NES_CM_STATE_ESTABLISHED:
1550         case NES_CM_STATE_FIN_WAIT1:
1551         case NES_CM_STATE_FIN_WAIT2:
1552         case NES_CM_STATE_MPAREQ_RCVD:
1553         case NES_CM_STATE_LAST_ACK:
1554         case NES_CM_STATE_CLOSING:
1555         case NES_CM_STATE_UNKNOWN:
1556         default:
1557                 drop_packet(skb);
1558                 break;
1559         }
1560 }
1561
1562 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1563         struct tcphdr *tcph)
1564 {
1565
1566         int ret;
1567         u32 inc_sequence;
1568         int optionsize;
1569
1570         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1571         skb_trim(skb, 0);
1572         inc_sequence = ntohl(tcph->seq);
1573         switch (cm_node->state) {
1574         case NES_CM_STATE_SYN_SENT:
1575                 /* active open */
1576                 if (check_syn(cm_node, tcph, skb))
1577                         return;
1578                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1579                 /* setup options */
1580                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1581                 if (ret) {
1582                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1583                                 cm_node);
1584                         break;
1585                 }
1586                 cleanup_retrans_entry(cm_node);
1587                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1588                 send_mpa_request(cm_node, skb);
1589                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1590                 break;
1591         case NES_CM_STATE_MPAREQ_RCVD:
1592                 /* passive open, so should not be here */
1593                 passive_open_err(cm_node, skb, 1);
1594                 break;
1595         case NES_CM_STATE_LISTENING:
1596         case NES_CM_STATE_CLOSED:
1597                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1598                 cleanup_retrans_entry(cm_node);
1599                 send_reset(cm_node, skb);
1600                 break;
1601         case NES_CM_STATE_ESTABLISHED:
1602         case NES_CM_STATE_FIN_WAIT1:
1603         case NES_CM_STATE_FIN_WAIT2:
1604         case NES_CM_STATE_LAST_ACK:
1605         case NES_CM_STATE_TSA:
1606         case NES_CM_STATE_CLOSING:
1607         case NES_CM_STATE_UNKNOWN:
1608         case NES_CM_STATE_MPAREQ_SENT:
1609         default:
1610                 drop_packet(skb);
1611                 break;
1612         }
1613 }
1614
1615 static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1616         struct tcphdr *tcph)
1617 {
1618         int datasize = 0;
1619         u32 inc_sequence;
1620         u32 rem_seq_ack;
1621         u32 rem_seq;
1622         int ret;
1623         int optionsize;
1624         u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
1625
1626         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1627         cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1628
1629         if (check_seq(cm_node, tcph, skb))
1630                 return;
1631
1632         skb_pull(skb, tcph->doff << 2);
1633         inc_sequence = ntohl(tcph->seq);
1634         rem_seq = ntohl(tcph->seq);
1635         rem_seq_ack =  ntohl(tcph->ack_seq);
1636         datasize = skb->len;
1637
1638         switch (cm_node->state) {
1639         case NES_CM_STATE_SYN_RCVD:
1640                 /* Passive OPEN */
1641                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1642                 if (ret)
1643                         break;
1644                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1645                 cm_node->tcp_cntxt.loc_seq_num = temp_seq;
1646                 if (cm_node->tcp_cntxt.rem_ack_num !=
1647                     cm_node->tcp_cntxt.loc_seq_num) {
1648                         nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
1649                         cleanup_retrans_entry(cm_node);
1650                         send_reset(cm_node, skb);
1651                         return;
1652                 }
1653                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1654                 if (datasize) {
1655                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1656                         cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1657                         handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
1658                  } else { /* rcvd ACK only */
1659                         dev_kfree_skb_any(skb);
1660                         cleanup_retrans_entry(cm_node);
1661                  }
1662                 break;
1663         case NES_CM_STATE_ESTABLISHED:
1664                 /* Passive OPEN */
1665                 /* We expect mpa frame to be received only */
1666                 if (datasize) {
1667                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1668                         cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1669                         handle_rcv_mpa(cm_node, skb,
1670                                 NES_CM_EVENT_MPA_REQ);
1671                 } else
1672                         drop_packet(skb);
1673                 break;
1674         case NES_CM_STATE_MPAREQ_SENT:
1675                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1676                 if (datasize) {
1677                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1678                         handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
1679                 } else { /* Could be just an ack pkt.. */
1680                         cleanup_retrans_entry(cm_node);
1681                         dev_kfree_skb_any(skb);
1682                 }
1683                 break;
1684         case NES_CM_STATE_LISTENING:
1685         case NES_CM_STATE_CLOSED:
1686                 cleanup_retrans_entry(cm_node);
1687                 send_reset(cm_node, skb);
1688                 break;
1689         case NES_CM_STATE_FIN_WAIT1:
1690         case NES_CM_STATE_SYN_SENT:
1691         case NES_CM_STATE_FIN_WAIT2:
1692         case NES_CM_STATE_TSA:
1693         case NES_CM_STATE_MPAREQ_RCVD:
1694         case NES_CM_STATE_LAST_ACK:
1695         case NES_CM_STATE_CLOSING:
1696         case NES_CM_STATE_UNKNOWN:
1697         default:
1698                 drop_packet(skb);
1699                 break;
1700         }
1701 }
1702
1703
1704
1705 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1706         struct sk_buff *skb, int optionsize, int passive)
1707 {
1708         u8 *optionsloc = (u8 *)&tcph[1];
1709         if (optionsize) {
1710                 if (process_options(cm_node, optionsloc, optionsize,
1711                         (u32)tcph->syn)) {
1712                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1713                                 __func__, cm_node);
1714                         if (passive)
1715                                 passive_open_err(cm_node, skb, 1);
1716                         else
1717                                 active_open_err(cm_node, skb, 1);
1718                         return 1;
1719                 }
1720         }
1721
1722         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1723                         cm_node->tcp_cntxt.snd_wscale;
1724
1725         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1726                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1727         return 0;
1728 }
1729
1730 /*
1731  * active_open_err() will send reset() if flag set..
1732  * It will also send ABORT event.
1733  */
1734
1735 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1736         int reset)
1737 {
1738         cleanup_retrans_entry(cm_node);
1739         if (reset) {
1740                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1741                                 "state=%d\n", cm_node, cm_node->state);
1742                 add_ref_cm_node(cm_node);
1743                 send_reset(cm_node, skb);
1744         } else
1745                 dev_kfree_skb_any(skb);
1746
1747         cm_node->state = NES_CM_STATE_CLOSED;
1748         create_event(cm_node, NES_CM_EVENT_ABORTED);
1749 }
1750
1751 /*
1752  * passive_open_err() will either do a reset() or will free up the skb and
1753  * remove the cm_node.
1754  */
1755
1756 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1757         int reset)
1758 {
1759         cleanup_retrans_entry(cm_node);
1760         cm_node->state = NES_CM_STATE_CLOSED;
1761         if (reset) {
1762                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1763                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1764                 send_reset(cm_node, skb);
1765         } else {
1766                 dev_kfree_skb_any(skb);
1767                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1768         }
1769 }
1770
1771 /*
1772  * free_retrans_entry() routines assumes that the retrans_list_lock has
1773  * been acquired before calling.
1774  */
1775 static void free_retrans_entry(struct nes_cm_node *cm_node)
1776 {
1777         struct nes_timer_entry *send_entry;
1778         send_entry = cm_node->send_entry;
1779         if (send_entry) {
1780                 cm_node->send_entry = NULL;
1781                 dev_kfree_skb_any(send_entry->skb);
1782                 kfree(send_entry);
1783                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1784         }
1785 }
1786
1787 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1788 {
1789         unsigned long flags;
1790
1791         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1792         free_retrans_entry(cm_node);
1793         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1794 }
1795
1796 /**
1797  * process_packet
1798  * Returns skb if to be freed, else it will return NULL if already used..
1799  */
1800 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1801         struct nes_cm_core *cm_core)
1802 {
1803         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1804         struct tcphdr *tcph = tcp_hdr(skb);
1805         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1806
1807         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1808                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1809                 tcph->ack, tcph->rst, tcph->fin);
1810
1811         if (tcph->rst)
1812                 pkt_type = NES_PKT_TYPE_RST;
1813         else if (tcph->syn) {
1814                 pkt_type = NES_PKT_TYPE_SYN;
1815                 if (tcph->ack)
1816                         pkt_type = NES_PKT_TYPE_SYNACK;
1817         } else if (tcph->fin)
1818                 pkt_type = NES_PKT_TYPE_FIN;
1819         else if (tcph->ack)
1820                 pkt_type = NES_PKT_TYPE_ACK;
1821
1822         switch (pkt_type) {
1823         case NES_PKT_TYPE_SYN:
1824                 handle_syn_pkt(cm_node, skb, tcph);
1825                 break;
1826         case NES_PKT_TYPE_SYNACK:
1827                 handle_synack_pkt(cm_node, skb, tcph);
1828                 break;
1829         case NES_PKT_TYPE_ACK:
1830                 handle_ack_pkt(cm_node, skb, tcph);
1831                 break;
1832         case NES_PKT_TYPE_RST:
1833                 handle_rst_pkt(cm_node, skb, tcph);
1834                 break;
1835         case NES_PKT_TYPE_FIN:
1836                 handle_fin_pkt(cm_node, skb, tcph);
1837                 break;
1838         default:
1839                 drop_packet(skb);
1840                 break;
1841         }
1842 }
1843
1844 /**
1845  * mini_cm_listen - create a listen node with params
1846  */
1847 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1848         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1849 {
1850         struct nes_cm_listener *listener;
1851         unsigned long flags;
1852
1853         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1854                 cm_info->loc_addr, cm_info->loc_port);
1855
1856         /* cannot have multiple matching listeners */
1857         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1858                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1859         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1860                 /* find automatically incs ref count ??? */
1861                 atomic_dec(&listener->ref_count);
1862                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1863                 return NULL;
1864         }
1865
1866         if (!listener) {
1867                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1868                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1869                 if (!listener) {
1870                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1871                         return NULL;
1872                 }
1873
1874                 listener->loc_addr = htonl(cm_info->loc_addr);
1875                 listener->loc_port = htons(cm_info->loc_port);
1876                 listener->reused_node = 0;
1877
1878                 atomic_set(&listener->ref_count, 1);
1879         }
1880         /* pasive case */
1881         /* find already inc'ed the ref count */
1882         else {
1883                 listener->reused_node = 1;
1884         }
1885
1886         listener->cm_id = cm_info->cm_id;
1887         atomic_set(&listener->pend_accepts_cnt, 0);
1888         listener->cm_core = cm_core;
1889         listener->nesvnic = nesvnic;
1890         atomic_inc(&cm_core->node_cnt);
1891
1892         listener->conn_type = cm_info->conn_type;
1893         listener->backlog = cm_info->backlog;
1894         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1895
1896         if (!listener->reused_node) {
1897                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1898                 list_add(&listener->list, &cm_core->listen_list.list);
1899                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1900                 atomic_inc(&cm_core->listen_node_cnt);
1901         }
1902
1903         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
1904                         " listener = %p, backlog = %d, cm_id = %p.\n",
1905                         cm_info->loc_addr, cm_info->loc_port,
1906                         listener, listener->backlog, listener->cm_id);
1907
1908         return listener;
1909 }
1910
1911
1912 /**
1913  * mini_cm_connect - make a connection node with params
1914  */
1915 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
1916         struct nes_vnic *nesvnic, u16 private_data_len,
1917         void *private_data, struct nes_cm_info *cm_info)
1918 {
1919         int ret = 0;
1920         struct nes_cm_node *cm_node;
1921         struct nes_cm_listener *loopbackremotelistener;
1922         struct nes_cm_node *loopbackremotenode;
1923         struct nes_cm_info loopback_cm_info;
1924         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
1925         struct ietf_mpa_frame *mpa_frame = NULL;
1926
1927         /* create a CM connection node */
1928         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
1929         if (!cm_node)
1930                 return NULL;
1931         mpa_frame = &cm_node->mpa_frame;
1932         strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
1933         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
1934         mpa_frame->rev =  IETF_MPA_VERSION;
1935         mpa_frame->priv_data_len = htons(private_data_len);
1936
1937         /* set our node side to client (active) side */
1938         cm_node->tcp_cntxt.client = 1;
1939         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1940
1941         if (cm_info->loc_addr == cm_info->rem_addr) {
1942                 loopbackremotelistener = find_listener(cm_core,
1943                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
1944                                 NES_CM_LISTENER_ACTIVE_STATE);
1945                 if (loopbackremotelistener == NULL) {
1946                         create_event(cm_node, NES_CM_EVENT_ABORTED);
1947                 } else {
1948                         atomic_inc(&cm_loopbacks);
1949                         loopback_cm_info = *cm_info;
1950                         loopback_cm_info.loc_port = cm_info->rem_port;
1951                         loopback_cm_info.rem_port = cm_info->loc_port;
1952                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
1953                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
1954                                 &loopback_cm_info, loopbackremotelistener);
1955                         loopbackremotenode->loopbackpartner = cm_node;
1956                         loopbackremotenode->tcp_cntxt.rcv_wscale =
1957                                 NES_CM_DEFAULT_RCV_WND_SCALE;
1958                         cm_node->loopbackpartner = loopbackremotenode;
1959                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
1960                                 private_data_len);
1961                         loopbackremotenode->mpa_frame_size = private_data_len;
1962
1963                         /* we are done handling this state. */
1964                         /* set node to a TSA state */
1965                         cm_node->state = NES_CM_STATE_TSA;
1966                         cm_node->tcp_cntxt.rcv_nxt =
1967                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
1968                         loopbackremotenode->tcp_cntxt.rcv_nxt =
1969                                 cm_node->tcp_cntxt.loc_seq_num;
1970                         cm_node->tcp_cntxt.max_snd_wnd =
1971                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
1972                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
1973                                 cm_node->tcp_cntxt.rcv_wnd;
1974                         cm_node->tcp_cntxt.snd_wnd =
1975                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
1976                         loopbackremotenode->tcp_cntxt.snd_wnd =
1977                                 cm_node->tcp_cntxt.rcv_wnd;
1978                         cm_node->tcp_cntxt.snd_wscale =
1979                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
1980                         loopbackremotenode->tcp_cntxt.snd_wscale =
1981                                 cm_node->tcp_cntxt.rcv_wscale;
1982
1983                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
1984                 }
1985                 return cm_node;
1986         }
1987
1988         /* set our node side to client (active) side */
1989         cm_node->tcp_cntxt.client = 1;
1990         /* init our MPA frame ptr */
1991         memcpy(mpa_frame->priv_data, private_data, private_data_len);
1992
1993         cm_node->mpa_frame_size = mpa_frame_size;
1994
1995         /* send a syn and goto syn sent state */
1996         cm_node->state = NES_CM_STATE_SYN_SENT;
1997         ret = send_syn(cm_node, 0, NULL);
1998
1999         if (ret) {
2000                 /* error in sending the syn free up the cm_node struct */
2001                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2002                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2003                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2004                         cm_node->cm_id);
2005                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2006                 cm_node = NULL;
2007         }
2008
2009         if (cm_node)
2010                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2011                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2012                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2013                         cm_node->cm_id);
2014
2015         return cm_node;
2016 }
2017
2018
2019 /**
2020  * mini_cm_accept - accept a connection
2021  * This function is never called
2022  */
2023 static int mini_cm_accept(struct nes_cm_core *cm_core,
2024         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2025 {
2026         return 0;
2027 }
2028
2029
2030 /**
2031  * mini_cm_reject - reject and teardown a connection
2032  */
2033 static int mini_cm_reject(struct nes_cm_core *cm_core,
2034         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2035 {
2036         int ret = 0;
2037         int passive_state;
2038
2039         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2040                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2041
2042         if (cm_node->tcp_cntxt.client)
2043                 return ret;
2044         cleanup_retrans_entry(cm_node);
2045
2046         passive_state = atomic_add_return(1, &cm_node->passive_state);
2047         cm_node->state = NES_CM_STATE_CLOSED;
2048         if (passive_state == NES_SEND_RESET_EVENT)
2049                 rem_ref_cm_node(cm_core, cm_node);
2050         else
2051                 ret = send_reset(cm_node, NULL);
2052         return ret;
2053 }
2054
2055
2056 /**
2057  * mini_cm_close
2058  */
2059 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2060 {
2061         int ret = 0;
2062
2063         if (!cm_core || !cm_node)
2064                 return -EINVAL;
2065
2066         switch (cm_node->state) {
2067         case NES_CM_STATE_SYN_RCVD:
2068         case NES_CM_STATE_SYN_SENT:
2069         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2070         case NES_CM_STATE_ESTABLISHED:
2071         case NES_CM_STATE_ACCEPTING:
2072         case NES_CM_STATE_MPAREQ_SENT:
2073         case NES_CM_STATE_MPAREQ_RCVD:
2074                 cleanup_retrans_entry(cm_node);
2075                 send_reset(cm_node, NULL);
2076                 break;
2077         case NES_CM_STATE_CLOSE_WAIT:
2078                 cm_node->state = NES_CM_STATE_LAST_ACK;
2079                 send_fin(cm_node, NULL);
2080                 break;
2081         case NES_CM_STATE_FIN_WAIT1:
2082         case NES_CM_STATE_FIN_WAIT2:
2083         case NES_CM_STATE_LAST_ACK:
2084         case NES_CM_STATE_TIME_WAIT:
2085         case NES_CM_STATE_CLOSING:
2086                 ret = -1;
2087                 break;
2088         case NES_CM_STATE_LISTENING:
2089         case NES_CM_STATE_UNKNOWN:
2090         case NES_CM_STATE_INITED:
2091         case NES_CM_STATE_CLOSED:
2092                 ret = rem_ref_cm_node(cm_core, cm_node);
2093                 break;
2094         case NES_CM_STATE_TSA:
2095                 if (cm_node->send_entry)
2096                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2097                                 "send_entry=%p\n", cm_node->send_entry);
2098                 ret = rem_ref_cm_node(cm_core, cm_node);
2099                 break;
2100         }
2101         return ret;
2102 }
2103
2104
2105 /**
2106  * recv_pkt - recv an ETHERNET packet, and process it through CM
2107  * node state machine
2108  */
2109 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2110         struct nes_vnic *nesvnic, struct sk_buff *skb)
2111 {
2112         struct nes_cm_node *cm_node = NULL;
2113         struct nes_cm_listener *listener = NULL;
2114         struct iphdr *iph;
2115         struct tcphdr *tcph;
2116         struct nes_cm_info nfo;
2117         int skb_handled = 1;
2118
2119         if (!skb)
2120                 return 0;
2121         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2122                 return 0;
2123         }
2124
2125         iph = (struct iphdr *)skb->data;
2126         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2127
2128         nfo.loc_addr = ntohl(iph->daddr);
2129         nfo.loc_port = ntohs(tcph->dest);
2130         nfo.rem_addr = ntohl(iph->saddr);
2131         nfo.rem_port = ntohs(tcph->source);
2132
2133         nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
2134                   ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
2135                   NIPQUAD(iph->daddr), tcph->dest,
2136                   NIPQUAD(iph->saddr), tcph->source);
2137
2138         do {
2139                 cm_node = find_node(cm_core,
2140                         nfo.rem_port, nfo.rem_addr,
2141                         nfo.loc_port, nfo.loc_addr);
2142
2143                 if (!cm_node) {
2144                         /* Only type of packet accepted are for */
2145                         /* the PASSIVE open (syn only) */
2146                         if ((!tcph->syn) || (tcph->ack)) {
2147                                 skb_handled = 0;
2148                                 break;
2149                         }
2150                         listener = find_listener(cm_core, nfo.loc_addr,
2151                                 nfo.loc_port,
2152                                 NES_CM_LISTENER_ACTIVE_STATE);
2153                         if (!listener) {
2154                                 nfo.cm_id = NULL;
2155                                 nfo.conn_type = 0;
2156                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2157                                 skb_handled = 0;
2158                                 break;
2159                         }
2160                         nfo.cm_id = listener->cm_id;
2161                         nfo.conn_type = listener->conn_type;
2162                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2163                                 listener);
2164                         if (!cm_node) {
2165                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2166                                         "node\n");
2167                                 cm_packets_dropped++;
2168                                 atomic_dec(&listener->ref_count);
2169                                 dev_kfree_skb_any(skb);
2170                                 break;
2171                         }
2172                         if (!tcph->rst && !tcph->fin) {
2173                                 cm_node->state = NES_CM_STATE_LISTENING;
2174                         } else {
2175                                 cm_packets_dropped++;
2176                                 rem_ref_cm_node(cm_core, cm_node);
2177                                 dev_kfree_skb_any(skb);
2178                                 break;
2179                         }
2180                         add_ref_cm_node(cm_node);
2181                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2182                         rem_ref_cm_node(cm_core, cm_node);
2183                         atomic_inc(&cm_accel_dropped_pkts);
2184                         dev_kfree_skb_any(skb);
2185                         break;
2186                 }
2187                 skb_reset_network_header(skb);
2188                 skb_set_transport_header(skb, sizeof(*tcph));
2189                 skb->len = ntohs(iph->tot_len);
2190                 process_packet(cm_node, skb, cm_core);
2191                 rem_ref_cm_node(cm_core, cm_node);
2192         } while (0);
2193         return skb_handled;
2194 }
2195
2196
2197 /**
2198  * nes_cm_alloc_core - allocate a top level instance of a cm core
2199  */
2200 static struct nes_cm_core *nes_cm_alloc_core(void)
2201 {
2202         int i;
2203
2204         struct nes_cm_core *cm_core;
2205         struct sk_buff *skb = NULL;
2206
2207         /* setup the CM core */
2208         /* alloc top level core control structure */
2209         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2210         if (!cm_core)
2211                 return NULL;
2212
2213         INIT_LIST_HEAD(&cm_core->connected_nodes);
2214         init_timer(&cm_core->tcp_timer);
2215         cm_core->tcp_timer.function = nes_cm_timer_tick;
2216
2217         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2218         cm_core->state = NES_CM_STATE_INITED;
2219         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2220
2221         atomic_set(&cm_core->events_posted, 0);
2222
2223         /* init the packet lists */
2224         skb_queue_head_init(&cm_core->tx_free_list);
2225
2226         for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) {
2227                 skb = dev_alloc_skb(cm_core->mtu);
2228                 if (!skb) {
2229                         kfree(cm_core);
2230                         return NULL;
2231                 }
2232                 /* add 'raw' skb to free frame list */
2233                 skb_queue_head(&cm_core->tx_free_list, skb);
2234         }
2235
2236         cm_core->api = &nes_cm_api;
2237
2238         spin_lock_init(&cm_core->ht_lock);
2239         spin_lock_init(&cm_core->listen_list_lock);
2240
2241         INIT_LIST_HEAD(&cm_core->listen_list.list);
2242
2243         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2244
2245         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2246         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2247         cm_core->post_event = nes_cm_post_event;
2248         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2249         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2250
2251         print_core(cm_core);
2252         return cm_core;
2253 }
2254
2255
2256 /**
2257  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2258  */
2259 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2260 {
2261         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2262
2263         if (!cm_core)
2264                 return -EINVAL;
2265
2266         barrier();
2267
2268         if (timer_pending(&cm_core->tcp_timer)) {
2269                 del_timer(&cm_core->tcp_timer);
2270         }
2271
2272         destroy_workqueue(cm_core->event_wq);
2273         destroy_workqueue(cm_core->disconn_wq);
2274         nes_debug(NES_DBG_CM, "\n");
2275         kfree(cm_core);
2276
2277         return 0;
2278 }
2279
2280
2281 /**
2282  * mini_cm_get
2283  */
2284 static int mini_cm_get(struct nes_cm_core *cm_core)
2285 {
2286         return cm_core->state;
2287 }
2288
2289
2290 /**
2291  * mini_cm_set
2292  */
2293 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2294 {
2295         int ret = 0;
2296
2297         switch (type) {
2298                 case NES_CM_SET_PKT_SIZE:
2299                         cm_core->mtu = value;
2300                         break;
2301                 case NES_CM_SET_FREE_PKT_Q_SIZE:
2302                         cm_core->free_tx_pkt_max = value;
2303                         break;
2304                 default:
2305                         /* unknown set option */
2306                         ret = -EINVAL;
2307         }
2308
2309         return ret;
2310 }
2311
2312
2313 /**
2314  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2315  * successfully exchanged when this is called
2316  */
2317 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2318 {
2319         int ret = 0;
2320
2321         if (!nesqp)
2322                 return -EINVAL;
2323
2324         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2325                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2326                         NES_QPCONTEXT_MISC_DROS);
2327
2328         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2329                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2330
2331         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2332
2333         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2334
2335         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2336                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2337
2338         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2339                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2340                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2341
2342         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2343                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2344                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2345
2346         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2347         nesqp->nesqp_context->ts_recent = 0;
2348         nesqp->nesqp_context->ts_age = 0;
2349         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2350         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2351         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2352         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2353                         cm_node->tcp_cntxt.rcv_wscale);
2354         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2355         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2356         nesqp->nesqp_context->srtt = 0;
2357         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2358         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2359         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2360         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2361         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2362         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2363
2364         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2365                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2366                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2367                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2368                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2369                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2370                         le32_to_cpu(nesqp->nesqp_context->misc));
2371         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2372         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2373         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2374
2375         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2376         cm_node->state = NES_CM_STATE_TSA;
2377
2378         return ret;
2379 }
2380
2381
2382 /**
2383  * nes_cm_disconn
2384  */
2385 int nes_cm_disconn(struct nes_qp *nesqp)
2386 {
2387         unsigned long flags;
2388
2389         spin_lock_irqsave(&nesqp->lock, flags);
2390         if (nesqp->disconn_pending == 0) {
2391                 nesqp->disconn_pending++;
2392                 spin_unlock_irqrestore(&nesqp->lock, flags);
2393                 /* init our disconnect work element, to */
2394                 INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
2395
2396                 queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
2397         } else
2398                 spin_unlock_irqrestore(&nesqp->lock, flags);
2399
2400         return 0;
2401 }
2402
2403
2404 /**
2405  * nes_disconnect_worker
2406  */
2407 static void nes_disconnect_worker(struct work_struct *work)
2408 {
2409         struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
2410
2411         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2412                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2413         nes_cm_disconn_true(nesqp);
2414 }
2415
2416
2417 /**
2418  * nes_cm_disconn_true
2419  */
2420 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2421 {
2422         unsigned long flags;
2423         int ret = 0;
2424         struct iw_cm_id *cm_id;
2425         struct iw_cm_event cm_event;
2426         struct nes_vnic *nesvnic;
2427         u16 last_ae;
2428         u8 original_hw_tcp_state;
2429         u8 original_ibqp_state;
2430         u8 issued_disconnect_reset = 0;
2431
2432         if (!nesqp) {
2433                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2434                 return -1;
2435         }
2436
2437         spin_lock_irqsave(&nesqp->lock, flags);
2438         cm_id = nesqp->cm_id;
2439         /* make sure we havent already closed this connection */
2440         if (!cm_id) {
2441                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2442                                 nesqp->hwqp.qp_id);
2443                 spin_unlock_irqrestore(&nesqp->lock, flags);
2444                 return -1;
2445         }
2446
2447         nesvnic = to_nesvnic(nesqp->ibqp.device);
2448         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2449
2450         original_hw_tcp_state = nesqp->hw_tcp_state;
2451         original_ibqp_state   = nesqp->ibqp_state;
2452         last_ae = nesqp->last_aeq;
2453
2454
2455         nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
2456
2457         if ((nesqp->cm_id) && (cm_id->event_handler)) {
2458                 if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2459                                 ((original_ibqp_state == IB_QPS_RTS) &&
2460                                 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2461                         atomic_inc(&cm_disconnects);
2462                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2463                         if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
2464                                 cm_event.status = IW_CM_EVENT_STATUS_RESET;
2465                                 nes_debug(NES_DBG_CM, "Generating a CM "
2466                                         "Disconnect Event (status reset) for "
2467                                         "QP%u, cm_id = %p. \n",
2468                                         nesqp->hwqp.qp_id, cm_id);
2469                         } else
2470                                 cm_event.status = IW_CM_EVENT_STATUS_OK;
2471
2472                         cm_event.local_addr = cm_id->local_addr;
2473                         cm_event.remote_addr = cm_id->remote_addr;
2474                         cm_event.private_data = NULL;
2475                         cm_event.private_data_len = 0;
2476
2477                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2478                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2479                                 "cm_id = %p, refcount = %u.\n",
2480                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2481                                 nesqp->hwqp.sq_tail, cm_id,
2482                                 atomic_read(&nesqp->refcount));
2483
2484                         spin_unlock_irqrestore(&nesqp->lock, flags);
2485                         ret = cm_id->event_handler(cm_id, &cm_event);
2486                         if (ret)
2487                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2488                                         "returned, ret=%d\n", ret);
2489                         spin_lock_irqsave(&nesqp->lock, flags);
2490                 }
2491
2492                 nesqp->disconn_pending = 0;
2493                 /* There might have been another AE while the lock was released */
2494                 original_hw_tcp_state = nesqp->hw_tcp_state;
2495                 original_ibqp_state   = nesqp->ibqp_state;
2496                 last_ae = nesqp->last_aeq;
2497
2498                 if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
2499                                 ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2500                                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2501                                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2502                                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2503                         atomic_inc(&cm_closes);
2504                         nesqp->cm_id = NULL;
2505                         nesqp->in_disconnect = 0;
2506                         spin_unlock_irqrestore(&nesqp->lock, flags);
2507                         nes_disconnect(nesqp, 1);
2508
2509                         cm_id->provider_data = nesqp;
2510                         /* Send up the close complete event */
2511                         cm_event.event = IW_CM_EVENT_CLOSE;
2512                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2513                         cm_event.provider_data = cm_id->provider_data;
2514                         cm_event.local_addr = cm_id->local_addr;
2515                         cm_event.remote_addr = cm_id->remote_addr;
2516                         cm_event.private_data = NULL;
2517                         cm_event.private_data_len = 0;
2518
2519                         ret = cm_id->event_handler(cm_id, &cm_event);
2520                         if (ret) {
2521                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2522                         }
2523
2524                         cm_id->rem_ref(cm_id);
2525
2526                         spin_lock_irqsave(&nesqp->lock, flags);
2527                         if (nesqp->flush_issued == 0) {
2528                                 nesqp->flush_issued = 1;
2529                                 spin_unlock_irqrestore(&nesqp->lock, flags);
2530                                 flush_wqes(nesvnic->nesdev, nesqp,
2531                                         NES_CQP_FLUSH_RQ, 1);
2532                         } else
2533                                 spin_unlock_irqrestore(&nesqp->lock, flags);
2534                 } else {
2535                         cm_id = nesqp->cm_id;
2536                         spin_unlock_irqrestore(&nesqp->lock, flags);
2537                         /* check to see if the inbound reset beat the outbound reset */
2538                         if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
2539                                 nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
2540                                         "due to inbound reset beating the "
2541                                         "outbound reset.\n", nesqp->hwqp.qp_id);
2542                         }
2543                 }
2544         } else {
2545                 nesqp->disconn_pending = 0;
2546                 spin_unlock_irqrestore(&nesqp->lock, flags);
2547         }
2548
2549         return 0;
2550 }
2551
2552
2553 /**
2554  * nes_disconnect
2555  */
2556 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2557 {
2558         int ret = 0;
2559         struct nes_vnic *nesvnic;
2560         struct nes_device *nesdev;
2561
2562         nesvnic = to_nesvnic(nesqp->ibqp.device);
2563         if (!nesvnic)
2564                 return -EINVAL;
2565
2566         nesdev = nesvnic->nesdev;
2567
2568         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2569                         atomic_read(&nesvnic->netdev->refcnt));
2570
2571         if (nesqp->active_conn) {
2572
2573                 /* indicate this connection is NOT active */
2574                 nesqp->active_conn = 0;
2575         } else {
2576                 /* Need to free the Last Streaming Mode Message */
2577                 if (nesqp->ietf_frame) {
2578                         pci_free_consistent(nesdev->pcidev,
2579                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2580                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2581                 }
2582         }
2583
2584         /* close the CM node down if it is still active */
2585         if (nesqp->cm_node) {
2586                 nes_debug(NES_DBG_CM, "Call close API\n");
2587
2588                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2589         }
2590
2591         return ret;
2592 }
2593
2594
2595 /**
2596  * nes_accept
2597  */
2598 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2599 {
2600         u64 u64temp;
2601         struct ib_qp *ibqp;
2602         struct nes_qp *nesqp;
2603         struct nes_vnic *nesvnic;
2604         struct nes_device *nesdev;
2605         struct nes_cm_node *cm_node;
2606         struct nes_adapter *adapter;
2607         struct ib_qp_attr attr;
2608         struct iw_cm_event cm_event;
2609         struct nes_hw_qp_wqe *wqe;
2610         struct nes_v4_quad nes_quad;
2611         u32 crc_value;
2612         int ret;
2613         int passive_state;
2614
2615         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2616         if (!ibqp)
2617                 return -EINVAL;
2618
2619         /* get all our handles */
2620         nesqp = to_nesqp(ibqp);
2621         nesvnic = to_nesvnic(nesqp->ibqp.device);
2622         nesdev = nesvnic->nesdev;
2623         adapter = nesdev->nesadapter;
2624
2625         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2626         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2627                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2628                 nesvnic->netdev->name);
2629
2630         /* associate the node with the QP */
2631         nesqp->cm_node = (void *)cm_node;
2632         cm_node->nesqp = nesqp;
2633         nes_add_ref(&nesqp->ibqp);
2634
2635         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2636                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2637         atomic_inc(&cm_accepts);
2638
2639         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2640                         atomic_read(&nesvnic->netdev->refcnt));
2641
2642         /* allocate the ietf frame and space for private data */
2643         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2644                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2645                 &nesqp->ietf_frame_pbase);
2646
2647         if (!nesqp->ietf_frame) {
2648                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2649                         "data\n");
2650                 return -ENOMEM;
2651         }
2652
2653
2654         /* setup the MPA frame */
2655         nesqp->private_data_len = conn_param->private_data_len;
2656         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2657
2658         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2659                         conn_param->private_data_len);
2660
2661         nesqp->ietf_frame->priv_data_len =
2662                 cpu_to_be16(conn_param->private_data_len);
2663         nesqp->ietf_frame->rev = mpa_version;
2664         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2665
2666         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2667         wqe = &nesqp->hwqp.sq_vbase[0];
2668
2669         if (cm_id->remote_addr.sin_addr.s_addr !=
2670                         cm_id->local_addr.sin_addr.s_addr) {
2671                 u64temp = (unsigned long)nesqp;
2672                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2673                 set_wqe_64bit_value(wqe->wqe_words,
2674                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2675                         u64temp);
2676                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2677                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2678                         NES_IWARP_SQ_WQE_WRPDU);
2679                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2680                         cpu_to_le32(conn_param->private_data_len +
2681                         sizeof(struct ietf_mpa_frame));
2682                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
2683                         cpu_to_le32((u32)nesqp->ietf_frame_pbase);
2684                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
2685                         cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
2686                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2687                         cpu_to_le32(conn_param->private_data_len +
2688                         sizeof(struct ietf_mpa_frame));
2689                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
2690
2691                 nesqp->nesqp_context->ird_ord_sizes |=
2692                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2693                         NES_QPCONTEXT_ORDIRD_WRPDU);
2694         } else {
2695                 nesqp->nesqp_context->ird_ord_sizes |=
2696                         cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2697                         NES_QPCONTEXT_ORDIRD_WRPDU |
2698                         NES_QPCONTEXT_ORDIRD_ALSMM));
2699         }
2700         nesqp->skip_lsmm = 1;
2701
2702
2703         /* Cache the cm_id in the qp */
2704         nesqp->cm_id = cm_id;
2705         cm_node->cm_id = cm_id;
2706
2707         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2708         cm_id->provider_data = nesqp;
2709         nesqp->active_conn   = 0;
2710
2711         if (cm_node->state == NES_CM_STATE_TSA)
2712                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2713                         cm_node);
2714
2715         nes_cm_init_tsa_conn(nesqp, cm_node);
2716
2717         nesqp->nesqp_context->tcpPorts[0] =
2718                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2719         nesqp->nesqp_context->tcpPorts[1] =
2720                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2721
2722         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2723                 nesqp->nesqp_context->ip0 =
2724                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2725         else
2726                 nesqp->nesqp_context->ip0 =
2727                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2728
2729         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2730                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2731                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2732
2733         nesqp->nesqp_context->arp_index_vlan |=
2734                 cpu_to_le32(nes_arp_table(nesdev,
2735                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2736                         NES_ARP_RESOLVE) << 16);
2737
2738         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2739                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2740
2741         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2742
2743         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2744                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2745         nesqp->nesqp_context->ird_ord_sizes |=
2746                 cpu_to_le32((u32)conn_param->ord);
2747
2748         memset(&nes_quad, 0, sizeof(nes_quad));
2749         nes_quad.DstIpAdrIndex =
2750                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2751         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2752                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2753         else
2754                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2755         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2756         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2757
2758         /* Produce hash key */
2759         crc_value = get_crc_value(&nes_quad);
2760         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2761         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2762                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2763
2764         nesqp->hte_index &= adapter->hte_index_mask;
2765         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2766
2767         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2768
2769         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2770                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2771                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2772                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2773                         ntohs(cm_id->remote_addr.sin_port),
2774                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2775                         ntohs(cm_id->local_addr.sin_port),
2776                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2777                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2778                         conn_param->private_data_len +
2779                         sizeof(struct ietf_mpa_frame));
2780
2781
2782         /* notify OF layer that accept event was successfull */
2783         cm_id->add_ref(cm_id);
2784
2785         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2786         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2787         cm_event.provider_data = (void *)nesqp;
2788         cm_event.local_addr = cm_id->local_addr;
2789         cm_event.remote_addr = cm_id->remote_addr;
2790         cm_event.private_data = NULL;
2791         cm_event.private_data_len = 0;
2792         ret = cm_id->event_handler(cm_id, &cm_event);
2793         attr.qp_state = IB_QPS_RTS;
2794         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2795         if (cm_node->loopbackpartner) {
2796                 cm_node->loopbackpartner->mpa_frame_size =
2797                         nesqp->private_data_len;
2798                 /* copy entire MPA frame to our cm_node's frame */
2799                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2800                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2801                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2802         }
2803         if (ret)
2804                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2805                         "ret=%d\n", __func__, __LINE__, ret);
2806
2807         passive_state = atomic_add_return(1, &cm_node->passive_state);
2808         if (passive_state == NES_SEND_RESET_EVENT)
2809                 create_event(cm_node, NES_CM_EVENT_RESET);
2810         return 0;
2811 }
2812
2813
2814 /**
2815  * nes_reject
2816  */
2817 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2818 {
2819         struct nes_cm_node *cm_node;
2820         struct nes_cm_core *cm_core;
2821
2822         atomic_inc(&cm_rejects);
2823         cm_node = (struct nes_cm_node *) cm_id->provider_data;
2824         cm_core = cm_node->cm_core;
2825         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
2826
2827         strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
2828         memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
2829
2830         cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
2831         cm_node->mpa_frame.rev = mpa_version;
2832         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
2833
2834         cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
2835
2836         return 0;
2837 }
2838
2839
2840 /**
2841  * nes_connect
2842  * setup and launch cm connect node
2843  */
2844 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2845 {
2846         struct ib_qp *ibqp;
2847         struct nes_qp *nesqp;
2848         struct nes_vnic *nesvnic;
2849         struct nes_device *nesdev;
2850         struct nes_cm_node *cm_node;
2851         struct nes_cm_info cm_info;
2852
2853         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2854         if (!ibqp)
2855                 return -EINVAL;
2856         nesqp = to_nesqp(ibqp);
2857         if (!nesqp)
2858                 return -EINVAL;
2859         nesvnic = to_nesvnic(nesqp->ibqp.device);
2860         if (!nesvnic)
2861                 return -EINVAL;
2862         nesdev  = nesvnic->nesdev;
2863         if (!nesdev)
2864                 return -EINVAL;
2865
2866         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
2867                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
2868                 ntohl(nesvnic->local_ipaddr),
2869                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2870                 ntohs(cm_id->remote_addr.sin_port),
2871                 ntohl(cm_id->local_addr.sin_addr.s_addr),
2872                 ntohs(cm_id->local_addr.sin_port));
2873
2874         atomic_inc(&cm_connects);
2875         nesqp->active_conn = 1;
2876
2877         /* cache the cm_id in the qp */
2878         nesqp->cm_id = cm_id;
2879
2880         cm_id->provider_data = nesqp;
2881
2882         nesqp->private_data_len = conn_param->private_data_len;
2883         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
2884         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
2885         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
2886                 conn_param->private_data_len);
2887
2888         if (cm_id->local_addr.sin_addr.s_addr !=
2889                 cm_id->remote_addr.sin_addr.s_addr)
2890                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2891                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
2892
2893         /* set up the connection params for the node */
2894         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
2895         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
2896         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
2897         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
2898         cm_info.cm_id = cm_id;
2899         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2900
2901         cm_id->add_ref(cm_id);
2902
2903         /* create a connect CM node connection */
2904         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
2905                 conn_param->private_data_len, (void *)conn_param->private_data,
2906                 &cm_info);
2907         if (!cm_node) {
2908                 if (cm_id->local_addr.sin_addr.s_addr !=
2909                                 cm_id->remote_addr.sin_addr.s_addr)
2910                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
2911                                 PCI_FUNC(nesdev->pcidev->devfn),
2912                                 NES_MANAGE_APBVT_DEL);
2913
2914                 cm_id->rem_ref(cm_id);
2915                 return -ENOMEM;
2916         }
2917
2918         cm_node->apbvt_set = 1;
2919         nesqp->cm_node = cm_node;
2920         cm_node->nesqp = nesqp;
2921         nes_add_ref(&nesqp->ibqp);
2922
2923         return 0;
2924 }
2925
2926
2927 /**
2928  * nes_create_listen
2929  */
2930 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
2931 {
2932         struct nes_vnic *nesvnic;
2933         struct nes_cm_listener *cm_node;
2934         struct nes_cm_info cm_info;
2935         struct nes_adapter *adapter;
2936         int err;
2937
2938
2939         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
2940                         cm_id, ntohs(cm_id->local_addr.sin_port));
2941
2942         nesvnic = to_nesvnic(cm_id->device);
2943         if (!nesvnic)
2944                 return -EINVAL;
2945         adapter = nesvnic->nesdev->nesadapter;
2946         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
2947                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
2948
2949         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
2950                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
2951
2952         /* setup listen params in our api call struct */
2953         cm_info.loc_addr = nesvnic->local_ipaddr;
2954         cm_info.loc_port = cm_id->local_addr.sin_port;
2955         cm_info.backlog = backlog;
2956         cm_info.cm_id = cm_id;
2957
2958         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
2959
2960
2961         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
2962         if (!cm_node) {
2963                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
2964                                 __func__, __LINE__);
2965                 return -ENOMEM;
2966         }
2967
2968         cm_id->provider_data = cm_node;
2969
2970         if (!cm_node->reused_node) {
2971                 err = nes_manage_apbvt(nesvnic,
2972                         ntohs(cm_id->local_addr.sin_port),
2973                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
2974                         NES_MANAGE_APBVT_ADD);
2975                 if (err) {
2976                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
2977                                 err);
2978                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
2979                         return err;
2980                 }
2981                 cm_listens_created++;
2982         }
2983
2984         cm_id->add_ref(cm_id);
2985         cm_id->provider_data = (void *)cm_node;
2986
2987
2988         return 0;
2989 }
2990
2991
2992 /**
2993  * nes_destroy_listen
2994  */
2995 int nes_destroy_listen(struct iw_cm_id *cm_id)
2996 {
2997         if (cm_id->provider_data)
2998                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
2999         else
3000                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3001
3002         cm_id->rem_ref(cm_id);
3003
3004         return 0;
3005 }
3006
3007
3008 /**
3009  * nes_cm_recv
3010  */
3011 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3012 {
3013         int rc = 0;
3014         cm_packets_received++;
3015         if ((g_cm_core) && (g_cm_core->api)) {
3016                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3017         } else {
3018                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3019                                 " cm is not setup properly.\n");
3020         }
3021
3022         return rc;
3023 }
3024
3025
3026 /**
3027  * nes_cm_start
3028  * Start and init a cm core module
3029  */
3030 int nes_cm_start(void)
3031 {
3032         nes_debug(NES_DBG_CM, "\n");
3033         /* create the primary CM core, pass this handle to subsequent core inits */
3034         g_cm_core = nes_cm_alloc_core();
3035         if (g_cm_core) {
3036                 return 0;
3037         } else {
3038                 return -ENOMEM;
3039         }
3040 }
3041
3042
3043 /**
3044  * nes_cm_stop
3045  * stop and dealloc all cm core instances
3046  */
3047 int nes_cm_stop(void)
3048 {
3049         g_cm_core->api->destroy_cm_core(g_cm_core);
3050         return 0;
3051 }
3052
3053
3054 /**
3055  * cm_event_connected
3056  * handle a connected event, setup QPs and HW
3057  */
3058 static void cm_event_connected(struct nes_cm_event *event)
3059 {
3060         u64 u64temp;
3061         struct nes_qp *nesqp;
3062         struct nes_vnic *nesvnic;
3063         struct nes_device *nesdev;
3064         struct nes_cm_node *cm_node;
3065         struct nes_adapter *nesadapter;
3066         struct ib_qp_attr attr;
3067         struct iw_cm_id *cm_id;
3068         struct iw_cm_event cm_event;
3069         struct nes_hw_qp_wqe *wqe;
3070         struct nes_v4_quad nes_quad;
3071         u32 crc_value;
3072         int ret;
3073
3074         /* get all our handles */
3075         cm_node = event->cm_node;
3076         cm_id = cm_node->cm_id;
3077         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3078         nesqp = (struct nes_qp *)cm_id->provider_data;
3079         nesvnic = to_nesvnic(nesqp->ibqp.device);
3080         nesdev = nesvnic->nesdev;
3081         nesadapter = nesdev->nesadapter;
3082
3083         if (nesqp->destroyed) {
3084                 return;
3085         }
3086         atomic_inc(&cm_connecteds);
3087         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3088                         " local port 0x%04X. jiffies = %lu.\n",
3089                         nesqp->hwqp.qp_id,
3090                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3091                         ntohs(cm_id->remote_addr.sin_port),
3092                         ntohs(cm_id->local_addr.sin_port),
3093                         jiffies);
3094
3095         nes_cm_init_tsa_conn(nesqp, cm_node);
3096
3097         /* set the QP tsa context */
3098         nesqp->nesqp_context->tcpPorts[0] =
3099                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3100         nesqp->nesqp_context->tcpPorts[1] =
3101                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3102         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3103                 nesqp->nesqp_context->ip0 =
3104                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3105         else
3106                 nesqp->nesqp_context->ip0 =
3107                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3108
3109         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3110                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3111                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3112         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3113                         nes_arp_table(nesdev,
3114                         le32_to_cpu(nesqp->nesqp_context->ip0),
3115                         NULL, NES_ARP_RESOLVE) << 16);
3116         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3117                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3118         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3119         nesqp->nesqp_context->ird_ord_sizes |=
3120                         cpu_to_le32((u32)1 <<
3121                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3122
3123         /* Adjust tail for not having a LSMM */
3124         nesqp->hwqp.sq_tail = 1;
3125
3126 #if defined(NES_SEND_FIRST_WRITE)
3127         if (cm_node->send_write0) {
3128                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3129                 wqe = &nesqp->hwqp.sq_vbase[0];
3130                 u64temp = (unsigned long)nesqp;
3131                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3132                 set_wqe_64bit_value(wqe->wqe_words,
3133                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3134                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3135                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3136                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3137                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3138                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3139                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3140                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3141
3142                 /* use the reserved spot on the WQ for the extra first WQE */
3143                 nesqp->nesqp_context->ird_ord_sizes &=
3144                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3145                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3146                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3147                 nesqp->skip_lsmm = 1;
3148                 nesqp->hwqp.sq_tail = 0;
3149                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3150                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3151         }
3152 #endif
3153
3154         memset(&nes_quad, 0, sizeof(nes_quad));
3155
3156         nes_quad.DstIpAdrIndex =
3157                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3158         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3159                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3160         else
3161                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3162         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3163         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3164
3165         /* Produce hash key */
3166         crc_value = get_crc_value(&nes_quad);
3167         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3168         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3169                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3170
3171         nesqp->hte_index &= nesadapter->hte_index_mask;
3172         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3173
3174         nesqp->ietf_frame = &cm_node->mpa_frame;
3175         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3176         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3177
3178         /* notify OF layer we successfully created the requested connection */
3179         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3180         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3181         cm_event.provider_data = cm_id->provider_data;
3182         cm_event.local_addr.sin_family = AF_INET;
3183         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3184         cm_event.remote_addr = cm_id->remote_addr;
3185
3186         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3187         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3188
3189         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3190         ret = cm_id->event_handler(cm_id, &cm_event);
3191         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3192
3193         if (ret)
3194                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3195                         "ret=%d\n", __func__, __LINE__, ret);
3196         attr.qp_state = IB_QPS_RTS;
3197         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3198
3199         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3200                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3201
3202         return;
3203 }
3204
3205
3206 /**
3207  * cm_event_connect_error
3208  */
3209 static void cm_event_connect_error(struct nes_cm_event *event)
3210 {
3211         struct nes_qp *nesqp;
3212         struct iw_cm_id *cm_id;
3213         struct iw_cm_event cm_event;
3214         /* struct nes_cm_info cm_info; */
3215         int ret;
3216
3217         if (!event->cm_node)
3218                 return;
3219
3220         cm_id = event->cm_node->cm_id;
3221         if (!cm_id) {
3222                 return;
3223         }
3224
3225         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3226         nesqp = cm_id->provider_data;
3227
3228         if (!nesqp) {
3229                 return;
3230         }
3231
3232         /* notify OF layer about this connection error event */
3233         /* cm_id->rem_ref(cm_id); */
3234         nesqp->cm_id = NULL;
3235         cm_id->provider_data = NULL;
3236         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3237         cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
3238         cm_event.provider_data = cm_id->provider_data;
3239         cm_event.local_addr = cm_id->local_addr;
3240         cm_event.remote_addr = cm_id->remote_addr;
3241         cm_event.private_data = NULL;
3242         cm_event.private_data_len = 0;
3243
3244         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3245                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3246                 cm_event.remote_addr.sin_addr.s_addr);
3247
3248         ret = cm_id->event_handler(cm_id, &cm_event);
3249         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3250         if (ret)
3251                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3252                         "ret=%d\n", __func__, __LINE__, ret);
3253         cm_id->rem_ref(cm_id);
3254
3255         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3256         return;
3257 }
3258
3259
3260 /**
3261  * cm_event_reset
3262  */
3263 static void cm_event_reset(struct nes_cm_event *event)
3264 {
3265         struct nes_qp *nesqp;
3266         struct iw_cm_id *cm_id;
3267         struct iw_cm_event cm_event;
3268         /* struct nes_cm_info cm_info; */
3269         int ret;
3270
3271         if (!event->cm_node)
3272                 return;
3273
3274         if (!event->cm_node->cm_id)
3275                 return;
3276
3277         cm_id = event->cm_node->cm_id;
3278
3279         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3280         nesqp = cm_id->provider_data;
3281
3282         nesqp->cm_id = NULL;
3283         /* cm_id->provider_data = NULL; */
3284         cm_event.event = IW_CM_EVENT_DISCONNECT;
3285         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3286         cm_event.provider_data = cm_id->provider_data;
3287         cm_event.local_addr = cm_id->local_addr;
3288         cm_event.remote_addr = cm_id->remote_addr;
3289         cm_event.private_data = NULL;
3290         cm_event.private_data_len = 0;
3291
3292         ret = cm_id->event_handler(cm_id, &cm_event);
3293         cm_id->add_ref(cm_id);
3294         atomic_inc(&cm_closes);
3295         cm_event.event = IW_CM_EVENT_CLOSE;
3296         cm_event.status = IW_CM_EVENT_STATUS_OK;
3297         cm_event.provider_data = cm_id->provider_data;
3298         cm_event.local_addr = cm_id->local_addr;
3299         cm_event.remote_addr = cm_id->remote_addr;
3300         cm_event.private_data = NULL;
3301         cm_event.private_data_len = 0;
3302         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3303         ret = cm_id->event_handler(cm_id, &cm_event);
3304
3305         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3306
3307
3308         /* notify OF layer about this connection error event */
3309         cm_id->rem_ref(cm_id);
3310
3311         return;
3312 }
3313
3314
3315 /**
3316  * cm_event_mpa_req
3317  */
3318 static void cm_event_mpa_req(struct nes_cm_event *event)
3319 {
3320         struct iw_cm_id   *cm_id;
3321         struct iw_cm_event cm_event;
3322         int ret;
3323         struct nes_cm_node *cm_node;
3324
3325         cm_node = event->cm_node;
3326         if (!cm_node)
3327                 return;
3328         cm_id = cm_node->cm_id;
3329
3330         atomic_inc(&cm_connect_reqs);
3331         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3332                         cm_node, cm_id, jiffies);
3333
3334         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3335         cm_event.status = IW_CM_EVENT_STATUS_OK;
3336         cm_event.provider_data = (void *)cm_node;
3337
3338         cm_event.local_addr.sin_family = AF_INET;
3339         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3340         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3341
3342         cm_event.remote_addr.sin_family = AF_INET;
3343         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3344         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3345
3346                 cm_event.private_data                = cm_node->mpa_frame_buf;
3347                 cm_event.private_data_len            = (u8) cm_node->mpa_frame_size;
3348
3349         ret = cm_id->event_handler(cm_id, &cm_event);
3350         if (ret)
3351                 printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
3352                                 __func__, __LINE__, ret);
3353
3354         return;
3355 }
3356
3357
3358 static void nes_cm_event_handler(struct work_struct *);
3359
3360 /**
3361  * nes_cm_post_event
3362  * post an event to the cm event handler
3363  */
3364 static int nes_cm_post_event(struct nes_cm_event *event)
3365 {
3366         atomic_inc(&event->cm_node->cm_core->events_posted);
3367         add_ref_cm_node(event->cm_node);
3368         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3369         INIT_WORK(&event->event_work, nes_cm_event_handler);
3370         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3371                 event->cm_node, event);
3372
3373         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3374
3375         nes_debug(NES_DBG_CM, "Exit\n");
3376         return 0;
3377 }
3378
3379
3380 /**
3381  * nes_cm_event_handler
3382  * worker function to handle cm events
3383  * will free instance of nes_cm_event
3384  */
3385 static void nes_cm_event_handler(struct work_struct *work)
3386 {
3387         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3388                         event_work);
3389         struct nes_cm_core *cm_core;
3390
3391         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3392                 return;
3393
3394         cm_core = event->cm_node->cm_core;
3395         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3396                 event, event->type, atomic_read(&cm_core->events_posted));
3397
3398         switch (event->type) {
3399         case NES_CM_EVENT_MPA_REQ:
3400                 cm_event_mpa_req(event);
3401                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3402                         event->cm_node);
3403                 break;
3404         case NES_CM_EVENT_RESET:
3405                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3406                         event->cm_node);
3407                 cm_event_reset(event);
3408                 break;
3409         case NES_CM_EVENT_CONNECTED:
3410                 if ((!event->cm_node->cm_id) ||
3411                         (event->cm_node->state != NES_CM_STATE_TSA))
3412                         break;
3413                 cm_event_connected(event);
3414                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3415                 break;
3416         case NES_CM_EVENT_ABORTED:
3417                 if ((!event->cm_node->cm_id) ||
3418                         (event->cm_node->state == NES_CM_STATE_TSA))
3419                         break;
3420                 cm_event_connect_error(event);
3421                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3422                 break;
3423         case NES_CM_EVENT_DROPPED_PKT:
3424                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3425                 break;
3426         default:
3427                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3428                 break;
3429         }
3430
3431         atomic_dec(&cm_core->events_posted);
3432         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3433         rem_ref_cm_node(cm_core, event->cm_node);
3434         kfree(event);
3435
3436         return;
3437 }