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