drivers/infiniband/hw/nes/nes_cm.c

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