drivers/infiniband/hw/nes/nes_cm.c

   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 <linux/highmem.h>
  56 #include <net/arp.h>
  57 #include <net/neighbour.h>
  58 #include <net/route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61
  62 #include "nes.h"
  63
  64 u32 cm_packets_sent;
  65 u32 cm_packets_bounced;
  66 u32 cm_packets_dropped;
  67 u32 cm_packets_retrans;
  68 u32 cm_packets_created;
  69 u32 cm_packets_received;
  70 atomic_t cm_listens_created;
  71 atomic_t cm_listens_destroyed;
  72 u32 cm_backlog_drops;
  73 atomic_t cm_loopbacks;
  74 atomic_t cm_nodes_created;
  75 atomic_t cm_nodes_destroyed;
  76 atomic_t cm_accel_dropped_pkts;
  77 atomic_t cm_resets_recvd;
  78
  79 static inline int mini_cm_accelerated(struct nes_cm_core *,
  80         struct nes_cm_node *);
  81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
  82         struct nes_vnic *, struct nes_cm_info *);
  83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
  84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
  85         struct nes_vnic *, u16, void *, struct nes_cm_info *);
  86 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
  87 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
  88         struct nes_cm_node *);
  89 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
  90         struct nes_cm_node *);
  91 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
  92         struct sk_buff *);
  93 static int mini_cm_dealloc_core(struct nes_cm_core *);
  94 static int mini_cm_get(struct nes_cm_core *);
  95 static int mini_cm_set(struct nes_cm_core *, u32, u32);
  96
  97 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
  98         void *, u32, void *, u32, u8);
  99 static int add_ref_cm_node(struct nes_cm_node *);
 100 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
 101
 102 static int nes_cm_disconn_true(struct nes_qp *);
 103 static int nes_cm_post_event(struct nes_cm_event *event);
 104 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
 105 static void nes_disconnect_worker(struct work_struct *work);
 106
 107 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
 108 static int send_mpa_reject(struct nes_cm_node *);
 109 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
 110 static int send_reset(struct nes_cm_node *, struct sk_buff *);
 111 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
 112 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
 113 static void process_packet(struct nes_cm_node *, struct sk_buff *,
 114         struct nes_cm_core *);
 115
 116 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
 117 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
 118 static void cleanup_retrans_entry(struct nes_cm_node *);
 119 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
 120 static void free_retrans_entry(struct nes_cm_node *cm_node);
 121 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
 122         struct sk_buff *skb, int optionsize, int passive);
 123
 124 /* CM event handler functions */
 125 static void cm_event_connected(struct nes_cm_event *);
 126 static void cm_event_connect_error(struct nes_cm_event *);
 127 static void cm_event_reset(struct nes_cm_event *);
 128 static void cm_event_mpa_req(struct nes_cm_event *);
 129 static void cm_event_mpa_reject(struct nes_cm_event *);
 130 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
 131
 132 static void print_core(struct nes_cm_core *core);
 133
 134 /* External CM API Interface */
 135 /* instance of function pointers for client API */
 136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
 137 static struct nes_cm_ops nes_cm_api = {
 138         mini_cm_accelerated,
 139         mini_cm_listen,
 140         mini_cm_del_listen,
 141         mini_cm_connect,
 142         mini_cm_close,
 143         mini_cm_accept,
 144         mini_cm_reject,
 145         mini_cm_recv_pkt,
 146         mini_cm_dealloc_core,
 147         mini_cm_get,
 148         mini_cm_set
 149 };
 150
 151 static struct nes_cm_core *g_cm_core;
 152
 153 atomic_t cm_connects;
 154 atomic_t cm_accepts;
 155 atomic_t cm_disconnects;
 156 atomic_t cm_closes;
 157 atomic_t cm_connecteds;
 158 atomic_t cm_connect_reqs;
 159 atomic_t cm_rejects;
 160
 161
 162 /**
 163  * create_event
 164  */
 165 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
 166                 enum nes_cm_event_type type)
 167 {
 168         struct nes_cm_event *event;
 169
 170         if (!cm_node->cm_id)
 171                 return NULL;
 172
 173         /* allocate an empty event */
 174         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 175
 176         if (!event)
 177                 return NULL;
 178
 179         event->type = type;
 180         event->cm_node = cm_node;
 181         event->cm_info.rem_addr = cm_node->rem_addr;
 182         event->cm_info.loc_addr = cm_node->loc_addr;
 183         event->cm_info.rem_port = cm_node->rem_port;
 184         event->cm_info.loc_port = cm_node->loc_port;
 185         event->cm_info.cm_id = cm_node->cm_id;
 186
 187         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
 188                 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
 189                 cm_node, event, type, event->cm_info.loc_addr,
 190                 event->cm_info.loc_port, event->cm_info.rem_addr,
 191                 event->cm_info.rem_port);
 192
 193         nes_cm_post_event(event);
 194         return event;
 195 }
 196
 197
 198 /**
 199  * send_mpa_request
 200  */
 201 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
 202 {
 203         if (!skb) {
 204                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
 205                 return -1;
 206         }
 207
 208         /* send an MPA Request frame */
 209         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 210                         cm_node->mpa_frame_size, SET_ACK);
 211
 212         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 213 }
 214
 215
 216
 217 static int send_mpa_reject(struct nes_cm_node *cm_node)
 218 {
 219         struct sk_buff  *skb = NULL;
 220
 221         skb = dev_alloc_skb(MAX_CM_BUFFER);
 222         if (!skb) {
 223                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 224                 return -ENOMEM;
 225         }
 226
 227         /* send an MPA reject frame */
 228         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 229                         cm_node->mpa_frame_size, SET_ACK | SET_FIN);
 230
 231         cm_node->state = NES_CM_STATE_FIN_WAIT1;
 232         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 233 }
 234
 235
 236 /**
 237  * recv_mpa - process a received TCP pkt, we are expecting an
 238  * IETF MPA frame
 239  */
 240 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
 241                 u32 len)
 242 {
 243         struct ietf_mpa_frame *mpa_frame;
 244
 245         *type = NES_MPA_REQUEST_ACCEPT;
 246
 247         /* assume req frame is in tcp data payload */
 248         if (len < sizeof(struct ietf_mpa_frame)) {
 249                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
 250                 return -EINVAL;
 251         }
 252
 253         mpa_frame = (struct ietf_mpa_frame *)buffer;
 254         cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
 255         /* make sure mpa private data len is less than 512 bytes */
 256         if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
 257                 nes_debug(NES_DBG_CM, "The received Length of Private"
 258                         " Data field exceeds 512 octets\n");
 259                 return -EINVAL;
 260         }
 261         /*
 262          * make sure MPA receiver interoperate with the
 263          * received MPA version and MPA key information
 264          *
 265          */
 266         if (mpa_frame->rev != mpa_version) {
 267                 nes_debug(NES_DBG_CM, "The received mpa version"
 268                                 " can not be interoperated\n");
 269                 return -EINVAL;
 270         }
 271         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 272                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 273                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 274                         return -EINVAL;
 275                 }
 276         } else {
 277                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 278                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 279                         return -EINVAL;
 280                 }
 281         }
 282
 283         if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
 284                 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
 285                                 " complete (%x + %x != %x)\n",
 286                                 cm_node->mpa_frame_size,
 287                                 (u32)sizeof(struct ietf_mpa_frame), len);
 288                 return -EINVAL;
 289         }
 290         /* make sure it does not exceed the max size */
 291         if (len > MAX_CM_BUFFER) {
 292                 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
 293                                 " (%x + %x != %x)\n",
 294                                 cm_node->mpa_frame_size,
 295                                 (u32)sizeof(struct ietf_mpa_frame), len);
 296                 return -EINVAL;
 297         }
 298
 299         /* copy entire MPA frame to our cm_node's frame */
 300         memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
 301                         cm_node->mpa_frame_size);
 302
 303         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
 304                 *type = NES_MPA_REQUEST_REJECT;
 305         return 0;
 306 }
 307
 308
 309 /**
 310  * form_cm_frame - get a free packet and build empty frame Use
 311  * node info to build.
 312  */
 313 static void form_cm_frame(struct sk_buff *skb,
 314         struct nes_cm_node *cm_node, void *options, u32 optionsize,
 315         void *data, u32 datasize, u8 flags)
 316 {
 317         struct tcphdr *tcph;
 318         struct iphdr *iph;
 319         struct ethhdr *ethh;
 320         u8 *buf;
 321         u16 packetsize = sizeof(*iph);
 322
 323         packetsize += sizeof(*tcph);
 324         packetsize +=  optionsize + datasize;
 325
 326         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
 327
 328         skb->len = 0;
 329         buf = skb_put(skb, packetsize + ETH_HLEN);
 330
 331         ethh = (struct ethhdr *) buf;
 332         buf += ETH_HLEN;
 333
 334         iph = (struct iphdr *)buf;
 335         buf += sizeof(*iph);
 336         tcph = (struct tcphdr *)buf;
 337         skb_reset_mac_header(skb);
 338         skb_set_network_header(skb, ETH_HLEN);
 339         skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
 340         buf += sizeof(*tcph);
 341
 342         skb->ip_summed = CHECKSUM_PARTIAL;
 343         skb->protocol = htons(0x800);
 344         skb->data_len = 0;
 345         skb->mac_len = ETH_HLEN;
 346
 347         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 348         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 349         ethh->h_proto = htons(0x0800);
 350
 351         iph->version = IPVERSION;
 352         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 353         iph->tos = 0;
 354         iph->tot_len = htons(packetsize);
 355         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 356
 357         iph->frag_off = htons(0x4000);
 358         iph->ttl = 0x40;
 359         iph->protocol = 0x06;   /* IPPROTO_TCP */
 360
 361         iph->saddr = htonl(cm_node->loc_addr);
 362         iph->daddr = htonl(cm_node->rem_addr);
 363
 364         tcph->source = htons(cm_node->loc_port);
 365         tcph->dest = htons(cm_node->rem_port);
 366         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 367
 368         if (flags & SET_ACK) {
 369                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 370                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 371                 tcph->ack = 1;
 372         } else
 373                 tcph->ack_seq = 0;
 374
 375         if (flags & SET_SYN) {
 376                 cm_node->tcp_cntxt.loc_seq_num++;
 377                 tcph->syn = 1;
 378         } else
 379                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 380
 381         if (flags & SET_FIN) {
 382                 cm_node->tcp_cntxt.loc_seq_num++;
 383                 tcph->fin = 1;
 384         }
 385
 386         if (flags & SET_RST)
 387                 tcph->rst = 1;
 388
 389         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 390         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 391         tcph->urg_ptr = 0;
 392         if (optionsize)
 393                 memcpy(buf, options, optionsize);
 394         buf += optionsize;
 395         if (datasize)
 396                 memcpy(buf, data, datasize);
 397
 398         skb_shinfo(skb)->nr_frags = 0;
 399         cm_packets_created++;
 400
 401 }
 402
 403
 404 /**
 405  * print_core - dump a cm core
 406  */
 407 static void print_core(struct nes_cm_core *core)
 408 {
 409         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 410         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 411         if (!core)
 412                 return;
 413         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 414
 415         nes_debug(NES_DBG_CM, "State         : %u \n",  core->state);
 416
 417         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 418         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 419
 420         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 421
 422         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 423 }
 424
 425
 426 /**
 427  * schedule_nes_timer
 428  * note - cm_node needs to be protected before calling this. Encase in:
 429  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
 430  */
 431 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 432                 enum nes_timer_type type, int send_retrans,
 433                 int close_when_complete)
 434 {
 435         unsigned long  flags;
 436         struct nes_cm_core *cm_core = cm_node->cm_core;
 437         struct nes_timer_entry *new_send;
 438         int ret = 0;
 439         u32 was_timer_set;
 440
 441         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 442         if (!new_send)
 443                 return -ENOMEM;
 444
 445         /* new_send->timetosend = currenttime */
 446         new_send->retrycount = NES_DEFAULT_RETRYS;
 447         new_send->retranscount = NES_DEFAULT_RETRANS;
 448         new_send->skb = skb;
 449         new_send->timetosend = jiffies;
 450         new_send->type = type;
 451         new_send->netdev = cm_node->netdev;
 452         new_send->send_retrans = send_retrans;
 453         new_send->close_when_complete = close_when_complete;
 454
 455         if (type == NES_TIMER_TYPE_CLOSE) {
 456                 new_send->timetosend += (HZ/10);
 457                 if (cm_node->recv_entry) {
 458                         kfree(new_send);
 459                         WARN_ON(1);
 460                         return -EINVAL;
 461                 }
 462                 cm_node->recv_entry = new_send;
 463         }
 464
 465         if (type == NES_TIMER_TYPE_SEND) {
 466                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 467                 atomic_inc(&new_send->skb->users);
 468                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 469                 cm_node->send_entry = new_send;
 470                 add_ref_cm_node(cm_node);
 471                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 472                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 473
 474                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 475                 if (ret != NETDEV_TX_OK) {
 476                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 477                                 "(jiffies = %lu)\n", new_send, jiffies);
 478                         new_send->timetosend = jiffies;
 479                         ret = NETDEV_TX_OK;
 480                 } else {
 481                         cm_packets_sent++;
 482                         if (!send_retrans) {
 483                                 cleanup_retrans_entry(cm_node);
 484                                 if (close_when_complete)
 485                                         rem_ref_cm_node(cm_core, cm_node);
 486                                 return ret;
 487                         }
 488                 }
 489         }
 490
 491         was_timer_set = timer_pending(&cm_core->tcp_timer);
 492
 493         if (!was_timer_set) {
 494                 cm_core->tcp_timer.expires = new_send->timetosend;
 495                 add_timer(&cm_core->tcp_timer);
 496         }
 497
 498         return ret;
 499 }
 500
 501 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 502 {
 503         struct iw_cm_id *cm_id = cm_node->cm_id;
 504         switch (cm_node->state) {
 505         case NES_CM_STATE_SYN_RCVD:
 506         case NES_CM_STATE_CLOSING:
 507                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 508                 break;
 509         case NES_CM_STATE_LAST_ACK:
 510         case NES_CM_STATE_FIN_WAIT1:
 511                 if (cm_node->cm_id)
 512                         cm_id->rem_ref(cm_id);
 513                 cm_node->state = NES_CM_STATE_CLOSED;
 514                 send_reset(cm_node, NULL);
 515                 break;
 516         default:
 517                 add_ref_cm_node(cm_node);
 518                 send_reset(cm_node, NULL);
 519                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 520         }
 521 }
 522
 523 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 524 {
 525         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 526         struct iw_cm_id *cm_id = cm_node->cm_id;
 527         struct nes_qp *nesqp;
 528         unsigned long qplockflags;
 529
 530         if (!recv_entry)
 531                 return;
 532         nesqp = (struct nes_qp *)recv_entry->skb;
 533         if (nesqp) {
 534                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 535                 if (nesqp->cm_id) {
 536                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 537                                 "refcount = %d: HIT A "
 538                                 "NES_TIMER_TYPE_CLOSE with something "
 539                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 540                                 atomic_read(&nesqp->refcount));
 541                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 542                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 543                         nesqp->ibqp_state = IB_QPS_ERR;
 544                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 545                         nes_cm_disconn(nesqp);
 546                 } else {
 547                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 548                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 549                                 "refcount = %d: HIT A "
 550                                 "NES_TIMER_TYPE_CLOSE with nothing "
 551                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 552                                 atomic_read(&nesqp->refcount));
 553                 }
 554         } else if (rem_node) {
 555                 /* TIME_WAIT state */
 556                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 557         }
 558         if (cm_node->cm_id)
 559                 cm_id->rem_ref(cm_id);
 560         kfree(recv_entry);
 561         cm_node->recv_entry = NULL;
 562 }
 563
 564 /**
 565  * nes_cm_timer_tick
 566  */
 567 static void nes_cm_timer_tick(unsigned long pass)
 568 {
 569         unsigned long flags;
 570         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 571         struct nes_cm_node *cm_node;
 572         struct nes_timer_entry *send_entry, *recv_entry;
 573         struct list_head *list_core_temp;
 574         struct list_head *list_node;
 575         struct nes_cm_core *cm_core = g_cm_core;
 576         u32 settimer = 0;
 577         unsigned long timetosend;
 578         int ret = NETDEV_TX_OK;
 579
 580         struct list_head timer_list;
 581         INIT_LIST_HEAD(&timer_list);
 582         spin_lock_irqsave(&cm_core->ht_lock, flags);
 583
 584         list_for_each_safe(list_node, list_core_temp,
 585                                 &cm_core->connected_nodes) {
 586                 cm_node = container_of(list_node, struct nes_cm_node, list);
 587                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 588                         add_ref_cm_node(cm_node);
 589                         list_add(&cm_node->timer_entry, &timer_list);
 590                 }
 591         }
 592         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 593
 594         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 595                 cm_node = container_of(list_node, struct nes_cm_node,
 596                                         timer_entry);
 597                 recv_entry = cm_node->recv_entry;
 598
 599                 if (recv_entry) {
 600                         if (time_after(recv_entry->timetosend, jiffies)) {
 601                                 if (nexttimeout > recv_entry->timetosend ||
 602                                                 !settimer) {
 603                                         nexttimeout = recv_entry->timetosend;
 604                                         settimer = 1;
 605                                 }
 606                         } else
 607                                 handle_recv_entry(cm_node, 1);
 608                 }
 609
 610                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 611                 do {
 612                         send_entry = cm_node->send_entry;
 613                         if (!send_entry)
 614                                 break;
 615                         if (time_after(send_entry->timetosend, jiffies)) {
 616                                 if (cm_node->state != NES_CM_STATE_TSA) {
 617                                         if ((nexttimeout >
 618                                                 send_entry->timetosend) ||
 619                                                 !settimer) {
 620                                                 nexttimeout =
 621                                                         send_entry->timetosend;
 622                                                 settimer = 1;
 623                                         }
 624                                 } else {
 625                                         free_retrans_entry(cm_node);
 626                                 }
 627                                 break;
 628                         }
 629
 630                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 631                                 (cm_node->state == NES_CM_STATE_CLOSED)) {
 632                                 free_retrans_entry(cm_node);
 633                                 break;
 634                         }
 635
 636                         if (!send_entry->retranscount ||
 637                                 !send_entry->retrycount) {
 638                                 cm_packets_dropped++;
 639                                 free_retrans_entry(cm_node);
 640
 641                                 spin_unlock_irqrestore(
 642                                         &cm_node->retrans_list_lock, flags);
 643                                 nes_retrans_expired(cm_node);
 644                                 cm_node->state = NES_CM_STATE_CLOSED;
 645                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 646                                         flags);
 647                                 break;
 648                         }
 649                         atomic_inc(&send_entry->skb->users);
 650                         cm_packets_retrans++;
 651                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 652                                 "for node %p, jiffies = %lu, time to send = "
 653                                 "%lu, retranscount = %u, send_entry->seq_num = "
 654                                 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 655                                 "0x%08X\n", send_entry, cm_node, jiffies,
 656                                 send_entry->timetosend,
 657                                 send_entry->retranscount,
 658                                 send_entry->seq_num,
 659                                 cm_node->tcp_cntxt.rem_ack_num);
 660
 661                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 662                                 flags);
 663                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 664                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 665                         if (ret != NETDEV_TX_OK) {
 666                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 667                                         "node=%p\n", cm_node);
 668                                 cm_packets_bounced++;
 669                                 send_entry->retrycount--;
 670                                 nexttimeout = jiffies + NES_SHORT_TIME;
 671                                 settimer = 1;
 672                                 break;
 673                         } else {
 674                                 cm_packets_sent++;
 675                         }
 676                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 677                                 "%u, retry count = %u.\n",
 678                                 send_entry->retranscount,
 679                                 send_entry->retrycount);
 680                         if (send_entry->send_retrans) {
 681                                 send_entry->retranscount--;
 682                                 timetosend = (NES_RETRY_TIMEOUT <<
 683                                         (NES_DEFAULT_RETRANS - send_entry->retranscount));
 684
 685                                 send_entry->timetosend = jiffies +
 686                                         min(timetosend, NES_MAX_TIMEOUT);
 687                                 if (nexttimeout > send_entry->timetosend ||
 688                                         !settimer) {
 689                                         nexttimeout = send_entry->timetosend;
 690                                         settimer = 1;
 691                                 }
 692                         } else {
 693                                 int close_when_complete;
 694                                 close_when_complete =
 695                                         send_entry->close_when_complete;
 696                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 697                                         cm_node, cm_node->state);
 698                                 free_retrans_entry(cm_node);
 699                                 if (close_when_complete)
 700                                         rem_ref_cm_node(cm_node->cm_core,
 701                                                 cm_node);
 702                         }
 703                 } while (0);
 704
 705                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 706                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 707         }
 708
 709         if (settimer) {
 710                 if (!timer_pending(&cm_core->tcp_timer)) {
 711                         cm_core->tcp_timer.expires  = nexttimeout;
 712                         add_timer(&cm_core->tcp_timer);
 713                 }
 714         }
 715 }
 716
 717
 718 /**
 719  * send_syn
 720  */
 721 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 722         struct sk_buff *skb)
 723 {
 724         int ret;
 725         int flags = SET_SYN;
 726         char optionsbuffer[sizeof(struct option_mss) +
 727                 sizeof(struct option_windowscale) + sizeof(struct option_base) +
 728                 TCP_OPTIONS_PADDING];
 729
 730         int optionssize = 0;
 731         /* Sending MSS option */
 732         union all_known_options *options;
 733
 734         if (!cm_node)
 735                 return -EINVAL;
 736
 737         options = (union all_known_options *)&optionsbuffer[optionssize];
 738         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 739         options->as_mss.length = sizeof(struct option_mss);
 740         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 741         optionssize += sizeof(struct option_mss);
 742
 743         options = (union all_known_options *)&optionsbuffer[optionssize];
 744         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 745         options->as_windowscale.length = sizeof(struct option_windowscale);
 746         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 747         optionssize += sizeof(struct option_windowscale);
 748
 749         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 750                 options = (union all_known_options *)&optionsbuffer[optionssize];
 751                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 752                 options->as_base.length = sizeof(struct option_base);
 753                 optionssize += sizeof(struct option_base);
 754                 /* we need the size to be a multiple of 4 */
 755                 options = (union all_known_options *)&optionsbuffer[optionssize];
 756                 options->as_end = 1;
 757                 optionssize += 1;
 758                 options = (union all_known_options *)&optionsbuffer[optionssize];
 759                 options->as_end = 1;
 760                 optionssize += 1;
 761         }
 762
 763         options = (union all_known_options *)&optionsbuffer[optionssize];
 764         options->as_end = OPTION_NUMBER_END;
 765         optionssize += 1;
 766
 767         if (!skb)
 768                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 769         if (!skb) {
 770                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 771                 return -1;
 772         }
 773
 774         if (sendack)
 775                 flags |= SET_ACK;
 776
 777         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
 778         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 779
 780         return ret;
 781 }
 782
 783
 784 /**
 785  * send_reset
 786  */
 787 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
 788 {
 789         int ret;
 790         int flags = SET_RST | SET_ACK;
 791
 792         if (!skb)
 793                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 794         if (!skb) {
 795                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 796                 return -ENOMEM;
 797         }
 798
 799         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
 800         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
 801
 802         return ret;
 803 }
 804
 805
 806 /**
 807  * send_ack
 808  */
 809 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
 810 {
 811         int ret;
 812
 813         if (!skb)
 814                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 815
 816         if (!skb) {
 817                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 818                 return -1;
 819         }
 820
 821         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
 822         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
 823
 824         return ret;
 825 }
 826
 827
 828 /**
 829  * send_fin
 830  */
 831 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
 832 {
 833         int ret;
 834
 835         /* if we didn't get a frame get one */
 836         if (!skb)
 837                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 838
 839         if (!skb) {
 840                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 841                 return -1;
 842         }
 843
 844         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
 845         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 846
 847         return ret;
 848 }
 849
 850
 851 /**
 852  * find_node - find a cm node that matches the reference cm node
 853  */
 854 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
 855                 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
 856 {
 857         unsigned long flags;
 858         struct list_head *hte;
 859         struct nes_cm_node *cm_node;
 860
 861         /* get a handle on the hte */
 862         hte = &cm_core->connected_nodes;
 863
 864         /* walk list and find cm_node associated with this session ID */
 865         spin_lock_irqsave(&cm_core->ht_lock, flags);
 866         list_for_each_entry(cm_node, hte, list) {
 867                 /* compare quad, return node handle if a match */
 868                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
 869                                 cm_node->loc_addr, cm_node->loc_port,
 870                                 loc_addr, loc_port,
 871                                 cm_node->rem_addr, cm_node->rem_port,
 872                                 rem_addr, rem_port);
 873                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
 874                                 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
 875                         add_ref_cm_node(cm_node);
 876                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 877                         return cm_node;
 878                 }
 879         }
 880         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 881
 882         /* no owner node */
 883         return NULL;
 884 }
 885
 886
 887 /**
 888  * find_listener - find a cm node listening on this addr-port pair
 889  */
 890 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
 891                 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
 892 {
 893         unsigned long flags;
 894         struct nes_cm_listener *listen_node;
 895
 896         /* walk list and find cm_node associated with this session ID */
 897         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
 898         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
 899                 /* compare node pair, return node handle if a match */
 900                 if (((listen_node->loc_addr == dst_addr) ||
 901                                 listen_node->loc_addr == 0x00000000) &&
 902                                 (listen_node->loc_port == dst_port) &&
 903                                 (listener_state & listen_node->listener_state)) {
 904                         atomic_inc(&listen_node->ref_count);
 905                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 906                         return listen_node;
 907                 }
 908         }
 909         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 910
 911         /* no listener */
 912         return NULL;
 913 }
 914
 915
 916 /**
 917  * add_hte_node - add a cm node to the hash table
 918  */
 919 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
 920 {
 921         unsigned long flags;
 922         struct list_head *hte;
 923
 924         if (!cm_node || !cm_core)
 925                 return -EINVAL;
 926
 927         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
 928                 cm_node);
 929
 930         spin_lock_irqsave(&cm_core->ht_lock, flags);
 931
 932         /* get a handle on the hash table element (list head for this slot) */
 933         hte = &cm_core->connected_nodes;
 934         list_add_tail(&cm_node->list, hte);
 935         atomic_inc(&cm_core->ht_node_cnt);
 936
 937         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 938
 939         return 0;
 940 }
 941
 942
 943 /**
 944  * mini_cm_dec_refcnt_listen
 945  */
 946 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
 947         struct nes_cm_listener *listener, int free_hanging_nodes)
 948 {
 949         int ret = -EINVAL;
 950         int err = 0;
 951         unsigned long flags;
 952         struct list_head *list_pos = NULL;
 953         struct list_head *list_temp = NULL;
 954         struct nes_cm_node *cm_node = NULL;
 955         struct list_head reset_list;
 956
 957         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
 958                 "refcnt=%d\n", listener, free_hanging_nodes,
 959                 atomic_read(&listener->ref_count));
 960         /* free non-accelerated child nodes for this listener */
 961         INIT_LIST_HEAD(&reset_list);
 962         if (free_hanging_nodes) {
 963                 spin_lock_irqsave(&cm_core->ht_lock, flags);
 964                 list_for_each_safe(list_pos, list_temp,
 965                                    &g_cm_core->connected_nodes) {
 966                         cm_node = container_of(list_pos, struct nes_cm_node,
 967                                 list);
 968                         if ((cm_node->listener == listener) &&
 969                             (!cm_node->accelerated)) {
 970                                 add_ref_cm_node(cm_node);
 971                                 list_add(&cm_node->reset_entry, &reset_list);
 972                         }
 973                 }
 974                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 975         }
 976
 977         list_for_each_safe(list_pos, list_temp, &reset_list) {
 978                 cm_node = container_of(list_pos, struct nes_cm_node,
 979                                 reset_entry);
 980                 {
 981                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
 982                         enum nes_cm_node_state old_state;
 983                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
 984                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 985                         } else {
 986                                 if (!loopback) {
 987                                         cleanup_retrans_entry(cm_node);
 988                                         err = send_reset(cm_node, NULL);
 989                                         if (err) {
 990                                                 cm_node->state =
 991                                                          NES_CM_STATE_CLOSED;
 992                                                 WARN_ON(1);
 993                                         } else {
 994                                                 old_state = cm_node->state;
 995                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
 996                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
 997                                                         rem_ref_cm_node(
 998                                                                 cm_node->cm_core,
 999                                                                 cm_node);
1000                                         }
1001                                 } else {
1002                                         struct nes_cm_event event;
1003
1004                                         event.cm_node = loopback;
1005                                         event.cm_info.rem_addr =
1006                                                         loopback->rem_addr;
1007                                         event.cm_info.loc_addr =
1008                                                         loopback->loc_addr;
1009                                         event.cm_info.rem_port =
1010                                                         loopback->rem_port;
1011                                         event.cm_info.loc_port =
1012                                                          loopback->loc_port;
1013                                         event.cm_info.cm_id = loopback->cm_id;
1014                                         add_ref_cm_node(loopback);
1015                                         loopback->state = NES_CM_STATE_CLOSED;
1016                                         cm_event_connect_error(&event);
1017                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1018
1019                                         rem_ref_cm_node(cm_node->cm_core,
1020                                                          cm_node);
1021
1022                                 }
1023                         }
1024                 }
1025         }
1026
1027         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1028         if (!atomic_dec_return(&listener->ref_count)) {
1029                 list_del(&listener->list);
1030
1031                 /* decrement our listen node count */
1032                 atomic_dec(&cm_core->listen_node_cnt);
1033
1034                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1035
1036                 if (listener->nesvnic) {
1037                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1038                                         PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1039                 }
1040
1041                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1042
1043                 kfree(listener);
1044                 listener = NULL;
1045                 ret = 0;
1046                 atomic_inc(&cm_listens_destroyed);
1047         } else {
1048                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1049         }
1050         if (listener) {
1051                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1052                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1053                                         " with non-zero pending accepts=%u\n",
1054                                         listener, atomic_read(&listener->pend_accepts_cnt));
1055         }
1056
1057         return ret;
1058 }
1059
1060
1061 /**
1062  * mini_cm_del_listen
1063  */
1064 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1065                 struct nes_cm_listener *listener)
1066 {
1067         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1068         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1069         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1070 }
1071
1072
1073 /**
1074  * mini_cm_accelerated
1075  */
1076 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1077                 struct nes_cm_node *cm_node)
1078 {
1079         u32 was_timer_set;
1080         cm_node->accelerated = 1;
1081
1082         if (cm_node->accept_pend) {
1083                 BUG_ON(!cm_node->listener);
1084                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1085                 cm_node->accept_pend = 0;
1086                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1087         }
1088
1089         was_timer_set = timer_pending(&cm_core->tcp_timer);
1090         if (!was_timer_set) {
1091                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1092                 add_timer(&cm_core->tcp_timer);
1093         }
1094
1095         return 0;
1096 }
1097
1098
1099 /**
1100  * nes_addr_resolve_neigh
1101  */
1102 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1103 {
1104         struct rtable *rt;
1105         struct flowi fl;
1106         struct neighbour *neigh;
1107         int rc = arpindex;
1108         struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1109
1110         memset(&fl, 0, sizeof fl);
1111         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1112         if (ip_route_output_key(&init_net, &rt, &fl)) {
1113                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1114                                 __func__, dst_ip);
1115                 return rc;
1116         }
1117
1118         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1119         if (neigh) {
1120                 if (neigh->nud_state & NUD_VALID) {
1121                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1122                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1123                                   neigh->ha, ntohl(rt->rt_gateway));
1124
1125                         if (arpindex >= 0) {
1126                                 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1127                                                         neigh->ha, ETH_ALEN)){
1128                                         /* Mac address same as in nes_arp_table */
1129                                         neigh_release(neigh);
1130                                         ip_rt_put(rt);
1131                                         return rc;
1132                                 }
1133
1134                                 nes_manage_arp_cache(nesvnic->netdev,
1135                                                 nesadapter->arp_table[arpindex].mac_addr,
1136                                                 dst_ip, NES_ARP_DELETE);
1137                         }
1138
1139                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1140                                              dst_ip, NES_ARP_ADD);
1141                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1142                                            NES_ARP_RESOLVE);
1143                 }
1144                 neigh_release(neigh);
1145         }
1146
1147         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1148                 neigh_event_send(rt->u.dst.neighbour, NULL);
1149
1150         ip_rt_put(rt);
1151         return rc;
1152 }
1153
1154 /**
1155  * make_cm_node - create a new instance of a cm node
1156  */
1157 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1158                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1159                 struct nes_cm_listener *listener)
1160 {
1161         struct nes_cm_node *cm_node;
1162         struct timespec ts;
1163         int oldarpindex = 0;
1164         int arpindex = 0;
1165         struct nes_device *nesdev;
1166         struct nes_adapter *nesadapter;
1167
1168         /* create an hte and cm_node for this instance */
1169         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1170         if (!cm_node)
1171                 return NULL;
1172
1173         /* set our node specific transport info */
1174         cm_node->loc_addr = cm_info->loc_addr;
1175         cm_node->rem_addr = cm_info->rem_addr;
1176         cm_node->loc_port = cm_info->loc_port;
1177         cm_node->rem_port = cm_info->rem_port;
1178         cm_node->send_write0 = send_first;
1179         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1180                   &cm_node->loc_addr, cm_node->loc_port,
1181                   &cm_node->rem_addr, cm_node->rem_port);
1182         cm_node->listener = listener;
1183         cm_node->netdev = nesvnic->netdev;
1184         cm_node->cm_id = cm_info->cm_id;
1185         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1186
1187         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1188                         cm_node->cm_id);
1189
1190         spin_lock_init(&cm_node->retrans_list_lock);
1191
1192         cm_node->loopbackpartner = NULL;
1193         atomic_set(&cm_node->ref_count, 1);
1194         /* associate our parent CM core */
1195         cm_node->cm_core = cm_core;
1196         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1197         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1198         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1199                         NES_CM_DEFAULT_RCV_WND_SCALE;
1200         ts = current_kernel_time();
1201         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1202         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1203                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1204         cm_node->tcp_cntxt.rcv_nxt = 0;
1205         /* get a unique session ID , add thread_id to an upcounter to handle race */
1206         atomic_inc(&cm_core->node_cnt);
1207         cm_node->conn_type = cm_info->conn_type;
1208         cm_node->apbvt_set = 0;
1209         cm_node->accept_pend = 0;
1210
1211         cm_node->nesvnic = nesvnic;
1212         /* get some device handles, for arp lookup */
1213         nesdev = nesvnic->nesdev;
1214         nesadapter = nesdev->nesadapter;
1215
1216         cm_node->loopbackpartner = NULL;
1217
1218         /* get the mac addr for the remote node */
1219         if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1220                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1221         else {
1222                 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1223                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1224
1225         }
1226         if (arpindex < 0) {
1227                 kfree(cm_node);
1228                 return NULL;
1229         }
1230
1231         /* copy the mac addr to node context */
1232         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1233         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1234                   cm_node->rem_mac);
1235
1236         add_hte_node(cm_core, cm_node);
1237         atomic_inc(&cm_nodes_created);
1238
1239         return cm_node;
1240 }
1241
1242
1243 /**
1244  * add_ref_cm_node - destroy an instance of a cm node
1245  */
1246 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1247 {
1248         atomic_inc(&cm_node->ref_count);
1249         return 0;
1250 }
1251
1252
1253 /**
1254  * rem_ref_cm_node - destroy an instance of a cm node
1255  */
1256 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1257         struct nes_cm_node *cm_node)
1258 {
1259         unsigned long flags;
1260         struct nes_qp *nesqp;
1261
1262         if (!cm_node)
1263                 return -EINVAL;
1264
1265         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1266         if (atomic_dec_return(&cm_node->ref_count)) {
1267                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1268                 return 0;
1269         }
1270         list_del(&cm_node->list);
1271         atomic_dec(&cm_core->ht_node_cnt);
1272         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1273
1274         /* if the node is destroyed before connection was accelerated */
1275         if (!cm_node->accelerated && cm_node->accept_pend) {
1276                 BUG_ON(!cm_node->listener);
1277                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1278                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1279         }
1280         WARN_ON(cm_node->send_entry);
1281         if (cm_node->recv_entry)
1282                 handle_recv_entry(cm_node, 0);
1283         if (cm_node->listener) {
1284                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1285         } else {
1286                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1287                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1288                                 PCI_FUNC(
1289                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1290                                 NES_MANAGE_APBVT_DEL);
1291                 }
1292         }
1293
1294         atomic_dec(&cm_core->node_cnt);
1295         atomic_inc(&cm_nodes_destroyed);
1296         nesqp = cm_node->nesqp;
1297         if (nesqp) {
1298                 nesqp->cm_node = NULL;
1299                 nes_rem_ref(&nesqp->ibqp);
1300                 cm_node->nesqp = NULL;
1301         }
1302
1303         kfree(cm_node);
1304         return 0;
1305 }
1306
1307 /**
1308  * process_options
1309  */
1310 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1311         u32 optionsize, u32 syn_packet)
1312 {
1313         u32 tmp;
1314         u32 offset = 0;
1315         union all_known_options *all_options;
1316         char got_mss_option = 0;
1317
1318         while (offset < optionsize) {
1319                 all_options = (union all_known_options *)(optionsloc + offset);
1320                 switch (all_options->as_base.optionnum) {
1321                 case OPTION_NUMBER_END:
1322                         offset = optionsize;
1323                         break;
1324                 case OPTION_NUMBER_NONE:
1325                         offset += 1;
1326                         continue;
1327                 case OPTION_NUMBER_MSS:
1328                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1329                                 "Size: %d\n", __func__,
1330                                 all_options->as_mss.length, offset, optionsize);
1331                         got_mss_option = 1;
1332                         if (all_options->as_mss.length != 4) {
1333                                 return 1;
1334                         } else {
1335                                 tmp = ntohs(all_options->as_mss.mss);
1336                                 if (tmp > 0 && tmp <
1337                                         cm_node->tcp_cntxt.mss)
1338                                         cm_node->tcp_cntxt.mss = tmp;
1339                         }
1340                         break;
1341                 case OPTION_NUMBER_WINDOW_SCALE:
1342                         cm_node->tcp_cntxt.snd_wscale =
1343                                 all_options->as_windowscale.shiftcount;
1344                         break;
1345                 case OPTION_NUMBER_WRITE0:
1346                         cm_node->send_write0 = 1;
1347                         break;
1348                 default:
1349                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1350                                 all_options->as_base.optionnum);
1351                         break;
1352                 }
1353                 offset += all_options->as_base.length;
1354         }
1355         if ((!got_mss_option) && (syn_packet))
1356                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1357         return 0;
1358 }
1359
1360 static void drop_packet(struct sk_buff *skb)
1361 {
1362         atomic_inc(&cm_accel_dropped_pkts);
1363         dev_kfree_skb_any(skb);
1364 }
1365
1366 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1367 {
1368         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1369                 "refcnt=%d\n", cm_node, cm_node->state,
1370                 atomic_read(&cm_node->ref_count));
1371         switch (cm_node->state) {
1372         case NES_CM_STATE_SYN_RCVD:
1373         case NES_CM_STATE_SYN_SENT:
1374         case NES_CM_STATE_ESTABLISHED:
1375         case NES_CM_STATE_MPAREJ_RCVD:
1376                 cm_node->tcp_cntxt.rcv_nxt++;
1377                 cleanup_retrans_entry(cm_node);
1378                 cm_node->state = NES_CM_STATE_LAST_ACK;
1379                 send_fin(cm_node, NULL);
1380                 break;
1381         case NES_CM_STATE_MPAREQ_SENT:
1382                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1383                 cm_node->tcp_cntxt.rcv_nxt++;
1384                 cleanup_retrans_entry(cm_node);
1385                 cm_node->state = NES_CM_STATE_CLOSED;
1386                 add_ref_cm_node(cm_node);
1387                 send_reset(cm_node, NULL);
1388                 break;
1389         case NES_CM_STATE_FIN_WAIT1:
1390                 cm_node->tcp_cntxt.rcv_nxt++;
1391                 cleanup_retrans_entry(cm_node);
1392                 cm_node->state = NES_CM_STATE_CLOSING;
1393                 send_ack(cm_node, NULL);
1394                 /* Wait for ACK as this is simultanous close..
1395                 * After we receive ACK, do not send anything..
1396                 * Just rm the node.. Done.. */
1397                 break;
1398         case NES_CM_STATE_FIN_WAIT2:
1399                 cm_node->tcp_cntxt.rcv_nxt++;
1400                 cleanup_retrans_entry(cm_node);
1401                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1402                 send_ack(cm_node, NULL);
1403                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1404                 break;
1405         case NES_CM_STATE_TIME_WAIT:
1406                 cm_node->tcp_cntxt.rcv_nxt++;
1407                 cleanup_retrans_entry(cm_node);
1408                 cm_node->state = NES_CM_STATE_CLOSED;
1409                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1410                 break;
1411         case NES_CM_STATE_TSA:
1412         default:
1413                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1414                         cm_node, cm_node->state);
1415                 break;
1416         }
1417 }
1418
1419
1420 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1421         struct tcphdr *tcph)
1422 {
1423
1424         int     reset = 0;      /* whether to send reset in case of err.. */
1425         int     passive_state;
1426         atomic_inc(&cm_resets_recvd);
1427         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1428                         " refcnt=%d\n", cm_node, cm_node->state,
1429                         atomic_read(&cm_node->ref_count));
1430         cleanup_retrans_entry(cm_node);
1431         switch (cm_node->state) {
1432         case NES_CM_STATE_SYN_SENT:
1433         case NES_CM_STATE_MPAREQ_SENT:
1434                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1435                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1436                         cm_node->listener, cm_node->state);
1437                 active_open_err(cm_node, skb, reset);
1438                 break;
1439         case NES_CM_STATE_MPAREQ_RCVD:
1440                 passive_state = atomic_add_return(1, &cm_node->passive_state);
1441                 if (passive_state ==  NES_SEND_RESET_EVENT)
1442                         create_event(cm_node, NES_CM_EVENT_RESET);
1443                 cm_node->state = NES_CM_STATE_CLOSED;
1444                 dev_kfree_skb_any(skb);
1445                 break;
1446         case NES_CM_STATE_ESTABLISHED:
1447         case NES_CM_STATE_SYN_RCVD:
1448         case NES_CM_STATE_LISTENING:
1449                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1450                 passive_open_err(cm_node, skb, reset);
1451                 break;
1452         case NES_CM_STATE_TSA:
1453                 active_open_err(cm_node, skb, reset);
1454                 break;
1455         case NES_CM_STATE_CLOSED:
1456                 drop_packet(skb);
1457                 break;
1458         case NES_CM_STATE_FIN_WAIT1:
1459         case NES_CM_STATE_LAST_ACK:
1460                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1461         case NES_CM_STATE_TIME_WAIT:
1462                 cm_node->state = NES_CM_STATE_CLOSED;
1463                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1464                 drop_packet(skb);
1465                 break;
1466         default:
1467                 drop_packet(skb);
1468                 break;
1469         }
1470 }
1471
1472
1473 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1474 {
1475
1476         int     ret = 0;
1477         int datasize = skb->len;
1478         u8 *dataloc = skb->data;
1479
1480         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1481         u32     res_type;
1482         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1483         if (ret) {
1484                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1485                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1486                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1487                                 "cm_node=%p listener=%p state=%d\n", __func__,
1488                                 __LINE__, cm_node, cm_node->listener,
1489                                 cm_node->state);
1490                         active_open_err(cm_node, skb, 1);
1491                 } else {
1492                         passive_open_err(cm_node, skb, 1);
1493                 }
1494                 return;
1495         }
1496
1497         switch (cm_node->state) {
1498         case NES_CM_STATE_ESTABLISHED:
1499                 if (res_type == NES_MPA_REQUEST_REJECT) {
1500                         /*BIG problem as we are receiving the MPA.. So should
1501                         * not be REJECT.. This is Passive Open.. We can
1502                         * only receive it Reject for Active Open...*/
1503                         WARN_ON(1);
1504                 }
1505                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1506                 type = NES_CM_EVENT_MPA_REQ;
1507                 atomic_set(&cm_node->passive_state,
1508                                 NES_PASSIVE_STATE_INDICATED);
1509                 break;
1510         case NES_CM_STATE_MPAREQ_SENT:
1511                 cleanup_retrans_entry(cm_node);
1512                 if (res_type == NES_MPA_REQUEST_REJECT) {
1513                         type = NES_CM_EVENT_MPA_REJECT;
1514                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1515                 } else {
1516                         type = NES_CM_EVENT_CONNECTED;
1517                         cm_node->state = NES_CM_STATE_TSA;
1518                 }
1519
1520                 break;
1521         default:
1522                 WARN_ON(1);
1523                 break;
1524         }
1525         dev_kfree_skb_any(skb);
1526         create_event(cm_node, type);
1527 }
1528
1529 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1530 {
1531         switch (cm_node->state) {
1532         case NES_CM_STATE_SYN_SENT:
1533         case NES_CM_STATE_MPAREQ_SENT:
1534                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1535                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1536                         cm_node->listener, cm_node->state);
1537                 active_open_err(cm_node, skb, 1);
1538                 break;
1539         case NES_CM_STATE_ESTABLISHED:
1540         case NES_CM_STATE_SYN_RCVD:
1541                 passive_open_err(cm_node, skb, 1);
1542                 break;
1543         case NES_CM_STATE_TSA:
1544         default:
1545                 drop_packet(skb);
1546         }
1547 }
1548
1549 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1550         struct sk_buff *skb)
1551 {
1552         int err;
1553
1554         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1555         if (err)
1556                 active_open_err(cm_node, skb, 1);
1557
1558         return err;
1559 }
1560
1561 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1562         struct sk_buff *skb)
1563 {
1564         int err = 0;
1565         u32 seq;
1566         u32 ack_seq;
1567         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1568         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1569         u32 rcv_wnd;
1570         seq = ntohl(tcph->seq);
1571         ack_seq = ntohl(tcph->ack_seq);
1572         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1573         if (ack_seq != loc_seq_num)
1574                 err = 1;
1575         else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1576                 err = 1;
1577         if (err) {
1578                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1579                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1580                         cm_node->listener, cm_node->state);
1581                 indicate_pkt_err(cm_node, skb);
1582                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1583                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1584                         rcv_wnd);
1585         }
1586         return err;
1587 }
1588
1589 /*
1590  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1591  * is created with a listener or it may comein as rexmitted packet which in
1592  * that case will be just dropped.
1593  */
1594
1595 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1596         struct tcphdr *tcph)
1597 {
1598         int ret;
1599         u32 inc_sequence;
1600         int optionsize;
1601
1602         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1603         skb_trim(skb, 0);
1604         inc_sequence = ntohl(tcph->seq);
1605
1606         switch (cm_node->state) {
1607         case NES_CM_STATE_SYN_SENT:
1608         case NES_CM_STATE_MPAREQ_SENT:
1609                 /* Rcvd syn on active open connection*/
1610                 active_open_err(cm_node, skb, 1);
1611                 break;
1612         case NES_CM_STATE_LISTENING:
1613                 /* Passive OPEN */
1614                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1615                                 cm_node->listener->backlog) {
1616                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1617                                 "pressure \n");
1618                         cm_backlog_drops++;
1619                         passive_open_err(cm_node, skb, 0);
1620                         break;
1621                 }
1622                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1623                         1);
1624                 if (ret) {
1625                         passive_open_err(cm_node, skb, 0);
1626                         /* drop pkt */
1627                         break;
1628                 }
1629                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1630                 BUG_ON(cm_node->send_entry);
1631                 cm_node->accept_pend = 1;
1632                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1633
1634                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1635                 send_syn(cm_node, 1, skb);
1636                 break;
1637         case NES_CM_STATE_CLOSED:
1638                 cleanup_retrans_entry(cm_node);
1639                 add_ref_cm_node(cm_node);
1640                 send_reset(cm_node, skb);
1641                 break;
1642         case NES_CM_STATE_TSA:
1643         case NES_CM_STATE_ESTABLISHED:
1644         case NES_CM_STATE_FIN_WAIT1:
1645         case NES_CM_STATE_FIN_WAIT2:
1646         case NES_CM_STATE_MPAREQ_RCVD:
1647         case NES_CM_STATE_LAST_ACK:
1648         case NES_CM_STATE_CLOSING:
1649         case NES_CM_STATE_UNKNOWN:
1650         default:
1651                 drop_packet(skb);
1652                 break;
1653         }
1654 }
1655
1656 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1657         struct tcphdr *tcph)
1658 {
1659
1660         int ret;
1661         u32 inc_sequence;
1662         int optionsize;
1663
1664         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1665         skb_trim(skb, 0);
1666         inc_sequence = ntohl(tcph->seq);
1667         switch (cm_node->state) {
1668         case NES_CM_STATE_SYN_SENT:
1669                 cleanup_retrans_entry(cm_node);
1670                 /* active open */
1671                 if (check_syn(cm_node, tcph, skb))
1672                         return;
1673                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1674                 /* setup options */
1675                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1676                 if (ret) {
1677                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1678                                 cm_node);
1679                         break;
1680                 }
1681                 cleanup_retrans_entry(cm_node);
1682                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1683                 send_mpa_request(cm_node, skb);
1684                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1685                 break;
1686         case NES_CM_STATE_MPAREQ_RCVD:
1687                 /* passive open, so should not be here */
1688                 passive_open_err(cm_node, skb, 1);
1689                 break;
1690         case NES_CM_STATE_LISTENING:
1691                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1692                 cleanup_retrans_entry(cm_node);
1693                 cm_node->state = NES_CM_STATE_CLOSED;
1694                 send_reset(cm_node, skb);
1695                 break;
1696         case NES_CM_STATE_CLOSED:
1697                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1698                 cleanup_retrans_entry(cm_node);
1699                 add_ref_cm_node(cm_node);
1700                 send_reset(cm_node, skb);
1701                 break;
1702         case NES_CM_STATE_ESTABLISHED:
1703         case NES_CM_STATE_FIN_WAIT1:
1704         case NES_CM_STATE_FIN_WAIT2:
1705         case NES_CM_STATE_LAST_ACK:
1706         case NES_CM_STATE_TSA:
1707         case NES_CM_STATE_CLOSING:
1708         case NES_CM_STATE_UNKNOWN:
1709         case NES_CM_STATE_MPAREQ_SENT:
1710         default:
1711                 drop_packet(skb);
1712                 break;
1713         }
1714 }
1715
1716 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1717         struct tcphdr *tcph)
1718 {
1719         int datasize = 0;
1720         u32 inc_sequence;
1721         u32 rem_seq_ack;
1722         u32 rem_seq;
1723         int ret = 0;
1724         int optionsize;
1725         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1726
1727         if (check_seq(cm_node, tcph, skb))
1728                 return -EINVAL;
1729
1730         skb_pull(skb, tcph->doff << 2);
1731         inc_sequence = ntohl(tcph->seq);
1732         rem_seq = ntohl(tcph->seq);
1733         rem_seq_ack =  ntohl(tcph->ack_seq);
1734         datasize = skb->len;
1735         switch (cm_node->state) {
1736         case NES_CM_STATE_SYN_RCVD:
1737                 /* Passive OPEN */
1738                 cleanup_retrans_entry(cm_node);
1739                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1740                 if (ret)
1741                         break;
1742                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1743                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1744                 if (datasize) {
1745                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1746                         handle_rcv_mpa(cm_node, skb);
1747                 } else  /* rcvd ACK only */
1748                         dev_kfree_skb_any(skb);
1749                 break;
1750         case NES_CM_STATE_ESTABLISHED:
1751                 /* Passive OPEN */
1752                 cleanup_retrans_entry(cm_node);
1753                 if (datasize) {
1754                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1755                         handle_rcv_mpa(cm_node, skb);
1756                 } else
1757                         drop_packet(skb);
1758                 break;
1759         case NES_CM_STATE_MPAREQ_SENT:
1760                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1761                 if (datasize) {
1762                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1763                         handle_rcv_mpa(cm_node, skb);
1764                 } else  /* Could be just an ack pkt.. */
1765                         dev_kfree_skb_any(skb);
1766                 break;
1767         case NES_CM_STATE_LISTENING:
1768                 cleanup_retrans_entry(cm_node);
1769                 cm_node->state = NES_CM_STATE_CLOSED;
1770                 send_reset(cm_node, skb);
1771                 break;
1772         case NES_CM_STATE_CLOSED:
1773                 cleanup_retrans_entry(cm_node);
1774                 add_ref_cm_node(cm_node);
1775                 send_reset(cm_node, skb);
1776                 break;
1777         case NES_CM_STATE_LAST_ACK:
1778         case NES_CM_STATE_CLOSING:
1779                 cleanup_retrans_entry(cm_node);
1780                 cm_node->state = NES_CM_STATE_CLOSED;
1781                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1782                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1783                 drop_packet(skb);
1784                 break;
1785         case NES_CM_STATE_FIN_WAIT1:
1786                 cleanup_retrans_entry(cm_node);
1787                 drop_packet(skb);
1788                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1789                 break;
1790         case NES_CM_STATE_SYN_SENT:
1791         case NES_CM_STATE_FIN_WAIT2:
1792         case NES_CM_STATE_TSA:
1793         case NES_CM_STATE_MPAREQ_RCVD:
1794         case NES_CM_STATE_UNKNOWN:
1795         default:
1796                 cleanup_retrans_entry(cm_node);
1797                 drop_packet(skb);
1798                 break;
1799         }
1800         return ret;
1801 }
1802
1803
1804
1805 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1806         struct sk_buff *skb, int optionsize, int passive)
1807 {
1808         u8 *optionsloc = (u8 *)&tcph[1];
1809         if (optionsize) {
1810                 if (process_options(cm_node, optionsloc, optionsize,
1811                         (u32)tcph->syn)) {
1812                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1813                                 __func__, cm_node);
1814                         if (passive)
1815                                 passive_open_err(cm_node, skb, 1);
1816                         else
1817                                 active_open_err(cm_node, skb, 1);
1818                         return 1;
1819                 }
1820         }
1821
1822         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1823                         cm_node->tcp_cntxt.snd_wscale;
1824
1825         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1826                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1827         return 0;
1828 }
1829
1830 /*
1831  * active_open_err() will send reset() if flag set..
1832  * It will also send ABORT event.
1833  */
1834
1835 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1836         int reset)
1837 {
1838         cleanup_retrans_entry(cm_node);
1839         if (reset) {
1840                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1841                                 "state=%d\n", cm_node, cm_node->state);
1842                 add_ref_cm_node(cm_node);
1843                 send_reset(cm_node, skb);
1844         } else
1845                 dev_kfree_skb_any(skb);
1846
1847         cm_node->state = NES_CM_STATE_CLOSED;
1848         create_event(cm_node, NES_CM_EVENT_ABORTED);
1849 }
1850
1851 /*
1852  * passive_open_err() will either do a reset() or will free up the skb and
1853  * remove the cm_node.
1854  */
1855
1856 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1857         int reset)
1858 {
1859         cleanup_retrans_entry(cm_node);
1860         cm_node->state = NES_CM_STATE_CLOSED;
1861         if (reset) {
1862                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1863                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1864                 send_reset(cm_node, skb);
1865         } else {
1866                 dev_kfree_skb_any(skb);
1867                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1868         }
1869 }
1870
1871 /*
1872  * free_retrans_entry() routines assumes that the retrans_list_lock has
1873  * been acquired before calling.
1874  */
1875 static void free_retrans_entry(struct nes_cm_node *cm_node)
1876 {
1877         struct nes_timer_entry *send_entry;
1878         send_entry = cm_node->send_entry;
1879         if (send_entry) {
1880                 cm_node->send_entry = NULL;
1881                 dev_kfree_skb_any(send_entry->skb);
1882                 kfree(send_entry);
1883                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1884         }
1885 }
1886
1887 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1888 {
1889         unsigned long flags;
1890
1891         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1892         free_retrans_entry(cm_node);
1893         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1894 }
1895
1896 /**
1897  * process_packet
1898  * Returns skb if to be freed, else it will return NULL if already used..
1899  */
1900 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1901         struct nes_cm_core *cm_core)
1902 {
1903         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1904         struct tcphdr *tcph = tcp_hdr(skb);
1905         u32     fin_set = 0;
1906         int ret = 0;
1907         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1908
1909         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1910                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1911                 tcph->ack, tcph->rst, tcph->fin);
1912
1913         if (tcph->rst)
1914                 pkt_type = NES_PKT_TYPE_RST;
1915         else if (tcph->syn) {
1916                 pkt_type = NES_PKT_TYPE_SYN;
1917                 if (tcph->ack)
1918                         pkt_type = NES_PKT_TYPE_SYNACK;
1919         } else if (tcph->ack)
1920                 pkt_type = NES_PKT_TYPE_ACK;
1921         if (tcph->fin)
1922                 fin_set = 1;
1923
1924         switch (pkt_type) {
1925         case NES_PKT_TYPE_SYN:
1926                 handle_syn_pkt(cm_node, skb, tcph);
1927                 break;
1928         case NES_PKT_TYPE_SYNACK:
1929                 handle_synack_pkt(cm_node, skb, tcph);
1930                 break;
1931         case NES_PKT_TYPE_ACK:
1932                 ret = handle_ack_pkt(cm_node, skb, tcph);
1933                 if (fin_set && !ret)
1934                         handle_fin_pkt(cm_node);
1935                 break;
1936         case NES_PKT_TYPE_RST:
1937                 handle_rst_pkt(cm_node, skb, tcph);
1938                 break;
1939         default:
1940                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1941                         handle_fin_pkt(cm_node);
1942                 drop_packet(skb);
1943                 break;
1944         }
1945 }
1946
1947 /**
1948  * mini_cm_listen - create a listen node with params
1949  */
1950 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1951         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1952 {
1953         struct nes_cm_listener *listener;
1954         unsigned long flags;
1955
1956         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1957                 cm_info->loc_addr, cm_info->loc_port);
1958
1959         /* cannot have multiple matching listeners */
1960         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1961                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1962         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1963                 /* find automatically incs ref count ??? */
1964                 atomic_dec(&listener->ref_count);
1965                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1966                 return NULL;
1967         }
1968
1969         if (!listener) {
1970                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1971                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1972                 if (!listener) {
1973                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1974                         return NULL;
1975                 }
1976
1977                 listener->loc_addr = htonl(cm_info->loc_addr);
1978                 listener->loc_port = htons(cm_info->loc_port);
1979                 listener->reused_node = 0;
1980
1981                 atomic_set(&listener->ref_count, 1);
1982         }
1983         /* pasive case */
1984         /* find already inc'ed the ref count */
1985         else {
1986                 listener->reused_node = 1;
1987         }
1988
1989         listener->cm_id = cm_info->cm_id;
1990         atomic_set(&listener->pend_accepts_cnt, 0);
1991         listener->cm_core = cm_core;
1992         listener->nesvnic = nesvnic;
1993         atomic_inc(&cm_core->node_cnt);
1994
1995         listener->conn_type = cm_info->conn_type;
1996         listener->backlog = cm_info->backlog;
1997         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1998
1999         if (!listener->reused_node) {
2000                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2001                 list_add(&listener->list, &cm_core->listen_list.list);
2002                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2003                 atomic_inc(&cm_core->listen_node_cnt);
2004         }
2005
2006         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2007                         " listener = %p, backlog = %d, cm_id = %p.\n",
2008                         cm_info->loc_addr, cm_info->loc_port,
2009                         listener, listener->backlog, listener->cm_id);
2010
2011         return listener;
2012 }
2013
2014
2015 /**
2016  * mini_cm_connect - make a connection node with params
2017  */
2018 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2019         struct nes_vnic *nesvnic, u16 private_data_len,
2020         void *private_data, struct nes_cm_info *cm_info)
2021 {
2022         int ret = 0;
2023         struct nes_cm_node *cm_node;
2024         struct nes_cm_listener *loopbackremotelistener;
2025         struct nes_cm_node *loopbackremotenode;
2026         struct nes_cm_info loopback_cm_info;
2027         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2028         struct ietf_mpa_frame *mpa_frame = NULL;
2029
2030         /* create a CM connection node */
2031         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2032         if (!cm_node)
2033                 return NULL;
2034         mpa_frame = &cm_node->mpa_frame;
2035         memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2036         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2037         mpa_frame->rev =  IETF_MPA_VERSION;
2038         mpa_frame->priv_data_len = htons(private_data_len);
2039
2040         /* set our node side to client (active) side */
2041         cm_node->tcp_cntxt.client = 1;
2042         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2043
2044         if (cm_info->loc_addr == cm_info->rem_addr) {
2045                 loopbackremotelistener = find_listener(cm_core,
2046                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2047                                 NES_CM_LISTENER_ACTIVE_STATE);
2048                 if (loopbackremotelistener == NULL) {
2049                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2050                 } else {
2051                         loopback_cm_info = *cm_info;
2052                         loopback_cm_info.loc_port = cm_info->rem_port;
2053                         loopback_cm_info.rem_port = cm_info->loc_port;
2054                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2055                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2056                                 &loopback_cm_info, loopbackremotelistener);
2057                         if (!loopbackremotenode) {
2058                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2059                                 return NULL;
2060                         }
2061                         atomic_inc(&cm_loopbacks);
2062                         loopbackremotenode->loopbackpartner = cm_node;
2063                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2064                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2065                         cm_node->loopbackpartner = loopbackremotenode;
2066                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2067                                 private_data_len);
2068                         loopbackremotenode->mpa_frame_size = private_data_len;
2069
2070                         /* we are done handling this state. */
2071                         /* set node to a TSA state */
2072                         cm_node->state = NES_CM_STATE_TSA;
2073                         cm_node->tcp_cntxt.rcv_nxt =
2074                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2075                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2076                                 cm_node->tcp_cntxt.loc_seq_num;
2077                         cm_node->tcp_cntxt.max_snd_wnd =
2078                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2079                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2080                                 cm_node->tcp_cntxt.rcv_wnd;
2081                         cm_node->tcp_cntxt.snd_wnd =
2082                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2083                         loopbackremotenode->tcp_cntxt.snd_wnd =
2084                                 cm_node->tcp_cntxt.rcv_wnd;
2085                         cm_node->tcp_cntxt.snd_wscale =
2086                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2087                         loopbackremotenode->tcp_cntxt.snd_wscale =
2088                                 cm_node->tcp_cntxt.rcv_wscale;
2089                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2090                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2091                 }
2092                 return cm_node;
2093         }
2094
2095         /* set our node side to client (active) side */
2096         cm_node->tcp_cntxt.client = 1;
2097         /* init our MPA frame ptr */
2098         memcpy(mpa_frame->priv_data, private_data, private_data_len);
2099
2100         cm_node->mpa_frame_size = mpa_frame_size;
2101
2102         /* send a syn and goto syn sent state */
2103         cm_node->state = NES_CM_STATE_SYN_SENT;
2104         ret = send_syn(cm_node, 0, NULL);
2105
2106         if (ret) {
2107                 /* error in sending the syn free up the cm_node struct */
2108                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2109                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2110                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2111                         cm_node->cm_id);
2112                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2113                 cm_node = NULL;
2114         }
2115
2116         if (cm_node)
2117                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2118                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2119                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2120                         cm_node->cm_id);
2121
2122         return cm_node;
2123 }
2124
2125
2126 /**
2127  * mini_cm_accept - accept a connection
2128  * This function is never called
2129  */
2130 static int mini_cm_accept(struct nes_cm_core *cm_core,
2131         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2132 {
2133         return 0;
2134 }
2135
2136
2137 /**
2138  * mini_cm_reject - reject and teardown a connection
2139  */
2140 static int mini_cm_reject(struct nes_cm_core *cm_core,
2141         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2142 {
2143         int ret = 0;
2144         int err = 0;
2145         int passive_state;
2146         struct nes_cm_event event;
2147         struct iw_cm_id *cm_id = cm_node->cm_id;
2148         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2149
2150         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2151                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2152
2153         if (cm_node->tcp_cntxt.client)
2154                 return ret;
2155         cleanup_retrans_entry(cm_node);
2156
2157         if (!loopback) {
2158                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2159                 if (passive_state == NES_SEND_RESET_EVENT) {
2160                         cm_node->state = NES_CM_STATE_CLOSED;
2161                         rem_ref_cm_node(cm_core, cm_node);
2162                 } else {
2163                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2164                                 rem_ref_cm_node(cm_core, cm_node);
2165                         } else {
2166                                 ret = send_mpa_reject(cm_node);
2167                                 if (ret) {
2168                                         cm_node->state = NES_CM_STATE_CLOSED;
2169                                         err = send_reset(cm_node, NULL);
2170                                         if (err)
2171                                                 WARN_ON(1);
2172                                 } else
2173                                         cm_id->add_ref(cm_id);
2174                         }
2175                 }
2176         } else {
2177                 cm_node->cm_id = NULL;
2178                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2179                         rem_ref_cm_node(cm_core, cm_node);
2180                         rem_ref_cm_node(cm_core, loopback);
2181                 } else {
2182                         event.cm_node = loopback;
2183                         event.cm_info.rem_addr = loopback->rem_addr;
2184                         event.cm_info.loc_addr = loopback->loc_addr;
2185                         event.cm_info.rem_port = loopback->rem_port;
2186                         event.cm_info.loc_port = loopback->loc_port;
2187                         event.cm_info.cm_id = loopback->cm_id;
2188                         cm_event_mpa_reject(&event);
2189                         rem_ref_cm_node(cm_core, cm_node);
2190                         loopback->state = NES_CM_STATE_CLOSING;
2191
2192                         cm_id = loopback->cm_id;
2193                         rem_ref_cm_node(cm_core, loopback);
2194                         cm_id->rem_ref(cm_id);
2195                 }
2196         }
2197
2198         return ret;
2199 }
2200
2201
2202 /**
2203  * mini_cm_close
2204  */
2205 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2206 {
2207         int ret = 0;
2208
2209         if (!cm_core || !cm_node)
2210                 return -EINVAL;
2211
2212         switch (cm_node->state) {
2213         case NES_CM_STATE_SYN_RCVD:
2214         case NES_CM_STATE_SYN_SENT:
2215         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2216         case NES_CM_STATE_ESTABLISHED:
2217         case NES_CM_STATE_ACCEPTING:
2218         case NES_CM_STATE_MPAREQ_SENT:
2219         case NES_CM_STATE_MPAREQ_RCVD:
2220                 cleanup_retrans_entry(cm_node);
2221                 send_reset(cm_node, NULL);
2222                 break;
2223         case NES_CM_STATE_CLOSE_WAIT:
2224                 cm_node->state = NES_CM_STATE_LAST_ACK;
2225                 send_fin(cm_node, NULL);
2226                 break;
2227         case NES_CM_STATE_FIN_WAIT1:
2228         case NES_CM_STATE_FIN_WAIT2:
2229         case NES_CM_STATE_LAST_ACK:
2230         case NES_CM_STATE_TIME_WAIT:
2231         case NES_CM_STATE_CLOSING:
2232                 ret = -1;
2233                 break;
2234         case NES_CM_STATE_LISTENING:
2235                 cleanup_retrans_entry(cm_node);
2236                 send_reset(cm_node, NULL);
2237                 break;
2238         case NES_CM_STATE_MPAREJ_RCVD:
2239         case NES_CM_STATE_UNKNOWN:
2240         case NES_CM_STATE_INITED:
2241         case NES_CM_STATE_CLOSED:
2242         case NES_CM_STATE_LISTENER_DESTROYED:
2243                 ret = rem_ref_cm_node(cm_core, cm_node);
2244                 break;
2245         case NES_CM_STATE_TSA:
2246                 if (cm_node->send_entry)
2247                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2248                                 "send_entry=%p\n", cm_node->send_entry);
2249                 ret = rem_ref_cm_node(cm_core, cm_node);
2250                 break;
2251         }
2252         return ret;
2253 }
2254
2255
2256 /**
2257  * recv_pkt - recv an ETHERNET packet, and process it through CM
2258  * node state machine
2259  */
2260 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2261         struct nes_vnic *nesvnic, struct sk_buff *skb)
2262 {
2263         struct nes_cm_node *cm_node = NULL;
2264         struct nes_cm_listener *listener = NULL;
2265         struct iphdr *iph;
2266         struct tcphdr *tcph;
2267         struct nes_cm_info nfo;
2268         int skb_handled = 1;
2269         __be32 tmp_daddr, tmp_saddr;
2270
2271         if (!skb)
2272                 return 0;
2273         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2274                 return 0;
2275         }
2276
2277         iph = (struct iphdr *)skb->data;
2278         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2279
2280         nfo.loc_addr = ntohl(iph->daddr);
2281         nfo.loc_port = ntohs(tcph->dest);
2282         nfo.rem_addr = ntohl(iph->saddr);
2283         nfo.rem_port = ntohs(tcph->source);
2284
2285         tmp_daddr = cpu_to_be32(iph->daddr);
2286         tmp_saddr = cpu_to_be32(iph->saddr);
2287
2288         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2289                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2290
2291         do {
2292                 cm_node = find_node(cm_core,
2293                         nfo.rem_port, nfo.rem_addr,
2294                         nfo.loc_port, nfo.loc_addr);
2295
2296                 if (!cm_node) {
2297                         /* Only type of packet accepted are for */
2298                         /* the PASSIVE open (syn only) */
2299                         if ((!tcph->syn) || (tcph->ack)) {
2300                                 skb_handled = 0;
2301                                 break;
2302                         }
2303                         listener = find_listener(cm_core, nfo.loc_addr,
2304                                 nfo.loc_port,
2305                                 NES_CM_LISTENER_ACTIVE_STATE);
2306                         if (!listener) {
2307                                 nfo.cm_id = NULL;
2308                                 nfo.conn_type = 0;
2309                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2310                                 skb_handled = 0;
2311                                 break;
2312                         }
2313                         nfo.cm_id = listener->cm_id;
2314                         nfo.conn_type = listener->conn_type;
2315                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2316                                 listener);
2317                         if (!cm_node) {
2318                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2319                                         "node\n");
2320                                 cm_packets_dropped++;
2321                                 atomic_dec(&listener->ref_count);
2322                                 dev_kfree_skb_any(skb);
2323                                 break;
2324                         }
2325                         if (!tcph->rst && !tcph->fin) {
2326                                 cm_node->state = NES_CM_STATE_LISTENING;
2327                         } else {
2328                                 cm_packets_dropped++;
2329                                 rem_ref_cm_node(cm_core, cm_node);
2330                                 dev_kfree_skb_any(skb);
2331                                 break;
2332                         }
2333                         add_ref_cm_node(cm_node);
2334                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2335                         rem_ref_cm_node(cm_core, cm_node);
2336                         atomic_inc(&cm_accel_dropped_pkts);
2337                         dev_kfree_skb_any(skb);
2338                         break;
2339                 }
2340                 skb_reset_network_header(skb);
2341                 skb_set_transport_header(skb, sizeof(*tcph));
2342                 skb->len = ntohs(iph->tot_len);
2343                 process_packet(cm_node, skb, cm_core);
2344                 rem_ref_cm_node(cm_core, cm_node);
2345         } while (0);
2346         return skb_handled;
2347 }
2348
2349
2350 /**
2351  * nes_cm_alloc_core - allocate a top level instance of a cm core
2352  */
2353 static struct nes_cm_core *nes_cm_alloc_core(void)
2354 {
2355         struct nes_cm_core *cm_core;
2356
2357         /* setup the CM core */
2358         /* alloc top level core control structure */
2359         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2360         if (!cm_core)
2361                 return NULL;
2362
2363         INIT_LIST_HEAD(&cm_core->connected_nodes);
2364         init_timer(&cm_core->tcp_timer);
2365         cm_core->tcp_timer.function = nes_cm_timer_tick;
2366
2367         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2368         cm_core->state = NES_CM_STATE_INITED;
2369         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2370
2371         atomic_set(&cm_core->events_posted, 0);
2372
2373         cm_core->api = &nes_cm_api;
2374
2375         spin_lock_init(&cm_core->ht_lock);
2376         spin_lock_init(&cm_core->listen_list_lock);
2377
2378         INIT_LIST_HEAD(&cm_core->listen_list.list);
2379
2380         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2381
2382         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2383         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2384         cm_core->post_event = nes_cm_post_event;
2385         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2386         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2387
2388         print_core(cm_core);
2389         return cm_core;
2390 }
2391
2392
2393 /**
2394  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2395  */
2396 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2397 {
2398         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2399
2400         if (!cm_core)
2401                 return -EINVAL;
2402
2403         barrier();
2404
2405         if (timer_pending(&cm_core->tcp_timer)) {
2406                 del_timer(&cm_core->tcp_timer);
2407         }
2408
2409         destroy_workqueue(cm_core->event_wq);
2410         destroy_workqueue(cm_core->disconn_wq);
2411         nes_debug(NES_DBG_CM, "\n");
2412         kfree(cm_core);
2413
2414         return 0;
2415 }
2416
2417
2418 /**
2419  * mini_cm_get
2420  */
2421 static int mini_cm_get(struct nes_cm_core *cm_core)
2422 {
2423         return cm_core->state;
2424 }
2425
2426
2427 /**
2428  * mini_cm_set
2429  */
2430 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2431 {
2432         int ret = 0;
2433
2434         switch (type) {
2435         case NES_CM_SET_PKT_SIZE:
2436                 cm_core->mtu = value;
2437                 break;
2438         case NES_CM_SET_FREE_PKT_Q_SIZE:
2439                 cm_core->free_tx_pkt_max = value;
2440                 break;
2441         default:
2442                 /* unknown set option */
2443                 ret = -EINVAL;
2444         }
2445
2446         return ret;
2447 }
2448
2449
2450 /**
2451  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2452  * successfully exchanged when this is called
2453  */
2454 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2455 {
2456         int ret = 0;
2457
2458         if (!nesqp)
2459                 return -EINVAL;
2460
2461         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2462                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2463                         NES_QPCONTEXT_MISC_DROS);
2464
2465         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2466                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2467
2468         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2469
2470         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2471
2472         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2473                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2474
2475         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2476                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2477                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2478
2479         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2480                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2481                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2482
2483         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2484         nesqp->nesqp_context->ts_recent = 0;
2485         nesqp->nesqp_context->ts_age = 0;
2486         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2487         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2488         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2489         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2490                         cm_node->tcp_cntxt.rcv_wscale);
2491         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2492         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2493         nesqp->nesqp_context->srtt = 0;
2494         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2495         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2496         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2497         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2498         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2499         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2500
2501         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2502                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2503                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2504                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2505                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2506                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2507                         le32_to_cpu(nesqp->nesqp_context->misc));
2508         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2509         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2510         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2511
2512         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2513         cm_node->state = NES_CM_STATE_TSA;
2514
2515         return ret;
2516 }
2517
2518
2519 /**
2520  * nes_cm_disconn
2521  */
2522 int nes_cm_disconn(struct nes_qp *nesqp)
2523 {
2524         struct disconn_work *work;
2525
2526         work = kzalloc(sizeof *work, GFP_ATOMIC);
2527         if (!work)
2528                 return -ENOMEM; /* Timer will clean up */
2529
2530         nes_add_ref(&nesqp->ibqp);
2531         work->nesqp = nesqp;
2532         INIT_WORK(&work->work, nes_disconnect_worker);
2533         queue_work(g_cm_core->disconn_wq, &work->work);
2534         return 0;
2535 }
2536
2537
2538 /**
2539  * nes_disconnect_worker
2540  */
2541 static void nes_disconnect_worker(struct work_struct *work)
2542 {
2543         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2544         struct nes_qp *nesqp = dwork->nesqp;
2545
2546         kfree(dwork);
2547         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2548                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2549         nes_cm_disconn_true(nesqp);
2550         nes_rem_ref(&nesqp->ibqp);
2551 }
2552
2553
2554 /**
2555  * nes_cm_disconn_true
2556  */
2557 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2558 {
2559         unsigned long flags;
2560         int ret = 0;
2561         struct iw_cm_id *cm_id;
2562         struct iw_cm_event cm_event;
2563         struct nes_vnic *nesvnic;
2564         u16 last_ae;
2565         u8 original_hw_tcp_state;
2566         u8 original_ibqp_state;
2567         enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2568         int issue_disconn = 0;
2569         int issue_close = 0;
2570         int issue_flush = 0;
2571         u32 flush_q = NES_CQP_FLUSH_RQ;
2572         struct ib_event ibevent;
2573
2574         if (!nesqp) {
2575                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2576                 return -1;
2577         }
2578
2579         spin_lock_irqsave(&nesqp->lock, flags);
2580         cm_id = nesqp->cm_id;
2581         /* make sure we havent already closed this connection */
2582         if (!cm_id) {
2583                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2584                                 nesqp->hwqp.qp_id);
2585                 spin_unlock_irqrestore(&nesqp->lock, flags);
2586                 return -1;
2587         }
2588
2589         nesvnic = to_nesvnic(nesqp->ibqp.device);
2590         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2591
2592         original_hw_tcp_state = nesqp->hw_tcp_state;
2593         original_ibqp_state   = nesqp->ibqp_state;
2594         last_ae = nesqp->last_aeq;
2595
2596         if (nesqp->term_flags) {
2597                 issue_disconn = 1;
2598                 issue_close = 1;
2599                 nesqp->cm_id = NULL;
2600                 if (nesqp->flush_issued == 0) {
2601                         nesqp->flush_issued = 1;
2602                         issue_flush = 1;
2603                 }
2604         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2605                         ((original_ibqp_state == IB_QPS_RTS) &&
2606                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2607                 issue_disconn = 1;
2608                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2609                         disconn_status = IW_CM_EVENT_STATUS_RESET;
2610         }
2611
2612         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2613                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2614                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2615                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2616                 issue_close = 1;
2617                 nesqp->cm_id = NULL;
2618                 if (nesqp->flush_issued == 0) {
2619                         nesqp->flush_issued = 1;
2620                         issue_flush = 1;
2621                 }
2622         }
2623
2624         spin_unlock_irqrestore(&nesqp->lock, flags);
2625
2626         if ((issue_flush) && (nesqp->destroyed == 0)) {
2627                 /* Flush the queue(s) */
2628                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2629                         flush_q |= NES_CQP_FLUSH_SQ;
2630                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2631
2632                 if (nesqp->term_flags) {
2633                         ibevent.device = nesqp->ibqp.device;
2634                         ibevent.event = nesqp->terminate_eventtype;
2635                         ibevent.element.qp = &nesqp->ibqp;
2636                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2637                 }
2638         }
2639
2640         if ((cm_id) && (cm_id->event_handler)) {
2641                 if (issue_disconn) {
2642                         atomic_inc(&cm_disconnects);
2643                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2644                         cm_event.status = disconn_status;
2645                         cm_event.local_addr = cm_id->local_addr;
2646                         cm_event.remote_addr = cm_id->remote_addr;
2647                         cm_event.private_data = NULL;
2648                         cm_event.private_data_len = 0;
2649
2650                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2651                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2652                                 "cm_id = %p, refcount = %u.\n",
2653                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2654                                 nesqp->hwqp.sq_tail, cm_id,
2655                                 atomic_read(&nesqp->refcount));
2656
2657                         ret = cm_id->event_handler(cm_id, &cm_event);
2658                         if (ret)
2659                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2660                                         "returned, ret=%d\n", ret);
2661                 }
2662
2663                 if (issue_close) {
2664                         atomic_inc(&cm_closes);
2665                         nes_disconnect(nesqp, 1);
2666
2667                         cm_id->provider_data = nesqp;
2668                         /* Send up the close complete event */
2669                         cm_event.event = IW_CM_EVENT_CLOSE;
2670                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2671                         cm_event.provider_data = cm_id->provider_data;
2672                         cm_event.local_addr = cm_id->local_addr;
2673                         cm_event.remote_addr = cm_id->remote_addr;
2674                         cm_event.private_data = NULL;
2675                         cm_event.private_data_len = 0;
2676
2677                         ret = cm_id->event_handler(cm_id, &cm_event);
2678                         if (ret) {
2679                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2680                         }
2681
2682                         cm_id->rem_ref(cm_id);
2683                 }
2684         }
2685
2686         return 0;
2687 }
2688
2689
2690 /**
2691  * nes_disconnect
2692  */
2693 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2694 {
2695         int ret = 0;
2696         struct nes_vnic *nesvnic;
2697         struct nes_device *nesdev;
2698         struct nes_ib_device *nesibdev;
2699
2700         nesvnic = to_nesvnic(nesqp->ibqp.device);
2701         if (!nesvnic)
2702                 return -EINVAL;
2703
2704         nesdev = nesvnic->nesdev;
2705         nesibdev = nesvnic->nesibdev;
2706
2707         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2708                         atomic_read(&nesvnic->netdev->refcnt));
2709
2710         if (nesqp->active_conn) {
2711
2712                 /* indicate this connection is NOT active */
2713                 nesqp->active_conn = 0;
2714         } else {
2715                 /* Need to free the Last Streaming Mode Message */
2716                 if (nesqp->ietf_frame) {
2717                         if (nesqp->lsmm_mr)
2718                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2719                         pci_free_consistent(nesdev->pcidev,
2720                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2721                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2722                 }
2723         }
2724
2725         /* close the CM node down if it is still active */
2726         if (nesqp->cm_node) {
2727                 nes_debug(NES_DBG_CM, "Call close API\n");
2728
2729                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2730         }
2731
2732         return ret;
2733 }
2734
2735
2736 /**
2737  * nes_accept
2738  */
2739 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2740 {
2741         u64 u64temp;
2742         struct ib_qp *ibqp;
2743         struct nes_qp *nesqp;
2744         struct nes_vnic *nesvnic;
2745         struct nes_device *nesdev;
2746         struct nes_cm_node *cm_node;
2747         struct nes_adapter *adapter;
2748         struct ib_qp_attr attr;
2749         struct iw_cm_event cm_event;
2750         struct nes_hw_qp_wqe *wqe;
2751         struct nes_v4_quad nes_quad;
2752         u32 crc_value;
2753         int ret;
2754         int passive_state;
2755         struct nes_ib_device *nesibdev;
2756         struct ib_mr *ibmr = NULL;
2757         struct ib_phys_buf ibphysbuf;
2758         struct nes_pd *nespd;
2759         u64 tagged_offset;
2760
2761         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2762         if (!ibqp)
2763                 return -EINVAL;
2764
2765         /* get all our handles */
2766         nesqp = to_nesqp(ibqp);
2767         nesvnic = to_nesvnic(nesqp->ibqp.device);
2768         nesdev = nesvnic->nesdev;
2769         adapter = nesdev->nesadapter;
2770
2771         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2772         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2773                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2774                 nesvnic->netdev->name);
2775
2776         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2777                 if (cm_node->loopbackpartner)
2778                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2779                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2780                 return -EINVAL;
2781         }
2782
2783         /* associate the node with the QP */
2784         nesqp->cm_node = (void *)cm_node;
2785         cm_node->nesqp = nesqp;
2786
2787         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2788                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2789         atomic_inc(&cm_accepts);
2790
2791         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2792                         atomic_read(&nesvnic->netdev->refcnt));
2793
2794         /* allocate the ietf frame and space for private data */
2795         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2796                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2797                 &nesqp->ietf_frame_pbase);
2798
2799         if (!nesqp->ietf_frame) {
2800                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2801                         "data\n");
2802                 return -ENOMEM;
2803         }
2804
2805
2806         /* setup the MPA frame */
2807         nesqp->private_data_len = conn_param->private_data_len;
2808         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2809
2810         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2811                         conn_param->private_data_len);
2812
2813         nesqp->ietf_frame->priv_data_len =
2814                 cpu_to_be16(conn_param->private_data_len);
2815         nesqp->ietf_frame->rev = mpa_version;
2816         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2817
2818         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2819         wqe = &nesqp->hwqp.sq_vbase[0];
2820
2821         if (cm_id->remote_addr.sin_addr.s_addr !=
2822                         cm_id->local_addr.sin_addr.s_addr) {
2823                 u64temp = (unsigned long)nesqp;
2824                 nesibdev = nesvnic->nesibdev;
2825                 nespd = nesqp->nespd;
2826                 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2827                 ibphysbuf.size = conn_param->private_data_len +
2828                                         sizeof(struct ietf_mpa_frame);
2829                 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2830                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2831                                                 &ibphysbuf, 1,
2832                                                 IB_ACCESS_LOCAL_WRITE,
2833                                                 &tagged_offset);
2834                 if (!ibmr) {
2835                         nes_debug(NES_DBG_CM, "Unable to register memory region"
2836                                         "for lSMM for cm_node = %p \n",
2837                                         cm_node);
2838                         pci_free_consistent(nesdev->pcidev,
2839                                 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2840                                 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2841                         return -ENOMEM;
2842                 }
2843
2844                 ibmr->pd = &nespd->ibpd;
2845                 ibmr->device = nespd->ibpd.device;
2846                 nesqp->lsmm_mr = ibmr;
2847
2848                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2849                 set_wqe_64bit_value(wqe->wqe_words,
2850                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2851                         u64temp);
2852                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2853                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2854                         NES_IWARP_SQ_WQE_WRPDU);
2855                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2856                         cpu_to_le32(conn_param->private_data_len +
2857                         sizeof(struct ietf_mpa_frame));
2858                 set_wqe_64bit_value(wqe->wqe_words,
2859                                         NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2860                                         (u64)(unsigned long)nesqp->ietf_frame);
2861                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2862                         cpu_to_le32(conn_param->private_data_len +
2863                         sizeof(struct ietf_mpa_frame));
2864                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2865                 if (nesqp->sq_kmapped) {
2866                         nesqp->sq_kmapped = 0;
2867                         kunmap(nesqp->page);
2868                 }
2869
2870                 nesqp->nesqp_context->ird_ord_sizes |=
2871                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2872                         NES_QPCONTEXT_ORDIRD_WRPDU);
2873         } else {
2874                 nesqp->nesqp_context->ird_ord_sizes |=
2875                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2876         }
2877         nesqp->skip_lsmm = 1;
2878
2879
2880         /* Cache the cm_id in the qp */
2881         nesqp->cm_id = cm_id;
2882         cm_node->cm_id = cm_id;
2883
2884         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2885         cm_id->provider_data = nesqp;
2886         nesqp->active_conn   = 0;
2887
2888         if (cm_node->state == NES_CM_STATE_TSA)
2889                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2890                         cm_node);
2891
2892         nes_cm_init_tsa_conn(nesqp, cm_node);
2893
2894         nesqp->nesqp_context->tcpPorts[0] =
2895                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2896         nesqp->nesqp_context->tcpPorts[1] =
2897                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2898
2899         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2900                 nesqp->nesqp_context->ip0 =
2901                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2902         else
2903                 nesqp->nesqp_context->ip0 =
2904                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2905
2906         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2907                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2908                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2909
2910         nesqp->nesqp_context->arp_index_vlan |=
2911                 cpu_to_le32(nes_arp_table(nesdev,
2912                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2913                         NES_ARP_RESOLVE) << 16);
2914
2915         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2916                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2917
2918         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2919
2920         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2921                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2922         nesqp->nesqp_context->ird_ord_sizes |=
2923                 cpu_to_le32((u32)conn_param->ord);
2924
2925         memset(&nes_quad, 0, sizeof(nes_quad));
2926         nes_quad.DstIpAdrIndex =
2927                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2928         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2929                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2930         else
2931                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2932         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2933         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2934
2935         /* Produce hash key */
2936         crc_value = get_crc_value(&nes_quad);
2937         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2938         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2939                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2940
2941         nesqp->hte_index &= adapter->hte_index_mask;
2942         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2943
2944         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2945
2946         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2947                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2948                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2949                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2950                         ntohs(cm_id->remote_addr.sin_port),
2951                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2952                         ntohs(cm_id->local_addr.sin_port),
2953                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2954                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2955                         conn_param->private_data_len +
2956                         sizeof(struct ietf_mpa_frame));
2957
2958
2959         /* notify OF layer that accept event was successful */
2960         cm_id->add_ref(cm_id);
2961         nes_add_ref(&nesqp->ibqp);
2962
2963         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2964         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2965         cm_event.provider_data = (void *)nesqp;
2966         cm_event.local_addr = cm_id->local_addr;
2967         cm_event.remote_addr = cm_id->remote_addr;
2968         cm_event.private_data = NULL;
2969         cm_event.private_data_len = 0;
2970         ret = cm_id->event_handler(cm_id, &cm_event);
2971         attr.qp_state = IB_QPS_RTS;
2972         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2973         if (cm_node->loopbackpartner) {
2974                 cm_node->loopbackpartner->mpa_frame_size =
2975                         nesqp->private_data_len;
2976                 /* copy entire MPA frame to our cm_node's frame */
2977                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2978                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2979                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2980         }
2981         if (ret)
2982                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2983                         "ret=%d\n", __func__, __LINE__, ret);
2984
2985         passive_state = atomic_add_return(1, &cm_node->passive_state);
2986         if (passive_state == NES_SEND_RESET_EVENT)
2987                 create_event(cm_node, NES_CM_EVENT_RESET);
2988         return 0;
2989 }
2990
2991
2992 /**
2993  * nes_reject
2994  */
2995 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2996 {
2997         struct nes_cm_node *cm_node;
2998         struct nes_cm_node *loopback;
2999
3000         struct nes_cm_core *cm_core;
3001
3002         atomic_inc(&cm_rejects);
3003         cm_node = (struct nes_cm_node *) cm_id->provider_data;
3004         loopback = cm_node->loopbackpartner;
3005         cm_core = cm_node->cm_core;
3006         cm_node->cm_id = cm_id;
3007         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3008
3009         if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3010                 return -EINVAL;
3011
3012         memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3013         if (loopback) {
3014                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3015                 loopback->mpa_frame.priv_data_len = pdata_len;
3016                 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3017                                 pdata_len;
3018         } else {
3019                 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3020                 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3021         }
3022
3023         cm_node->mpa_frame.rev = mpa_version;
3024         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3025
3026         return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3027 }
3028
3029
3030 /**
3031  * nes_connect
3032  * setup and launch cm connect node
3033  */
3034 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3035 {
3036         struct ib_qp *ibqp;
3037         struct nes_qp *nesqp;
3038         struct nes_vnic *nesvnic;
3039         struct nes_device *nesdev;
3040         struct nes_cm_node *cm_node;
3041         struct nes_cm_info cm_info;
3042         int apbvt_set = 0;
3043
3044         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3045         if (!ibqp)
3046                 return -EINVAL;
3047         nesqp = to_nesqp(ibqp);
3048         if (!nesqp)
3049                 return -EINVAL;
3050         nesvnic = to_nesvnic(nesqp->ibqp.device);
3051         if (!nesvnic)
3052                 return -EINVAL;
3053         nesdev  = nesvnic->nesdev;
3054         if (!nesdev)
3055                 return -EINVAL;
3056
3057         if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3058                 return -EINVAL;
3059
3060         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3061                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3062                 ntohl(nesvnic->local_ipaddr),
3063                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3064                 ntohs(cm_id->remote_addr.sin_port),
3065                 ntohl(cm_id->local_addr.sin_addr.s_addr),
3066                 ntohs(cm_id->local_addr.sin_port));
3067
3068         atomic_inc(&cm_connects);
3069         nesqp->active_conn = 1;
3070
3071         /* cache the cm_id in the qp */
3072         nesqp->cm_id = cm_id;
3073
3074         cm_id->provider_data = nesqp;
3075
3076         nesqp->private_data_len = conn_param->private_data_len;
3077         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3078         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3079         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3080                 conn_param->private_data_len);
3081
3082         if (cm_id->local_addr.sin_addr.s_addr !=
3083                 cm_id->remote_addr.sin_addr.s_addr) {
3084                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3085                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3086                 apbvt_set = 1;
3087         }
3088
3089         /* set up the connection params for the node */
3090         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3091         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3092         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3093         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3094         cm_info.cm_id = cm_id;
3095         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3096
3097         cm_id->add_ref(cm_id);
3098
3099         /* create a connect CM node connection */
3100         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3101                 conn_param->private_data_len, (void *)conn_param->private_data,
3102                 &cm_info);
3103         if (!cm_node) {
3104                 if (apbvt_set)
3105                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3106                                 PCI_FUNC(nesdev->pcidev->devfn),
3107                                 NES_MANAGE_APBVT_DEL);
3108
3109                 cm_id->rem_ref(cm_id);
3110                 return -ENOMEM;
3111         }
3112
3113         cm_node->apbvt_set = apbvt_set;
3114         nesqp->cm_node = cm_node;
3115         cm_node->nesqp = nesqp;
3116         nes_add_ref(&nesqp->ibqp);
3117
3118         return 0;
3119 }
3120
3121
3122 /**
3123  * nes_create_listen
3124  */
3125 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3126 {
3127         struct nes_vnic *nesvnic;
3128         struct nes_cm_listener *cm_node;
3129         struct nes_cm_info cm_info;
3130         struct nes_adapter *adapter;
3131         int err;
3132
3133
3134         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3135                         cm_id, ntohs(cm_id->local_addr.sin_port));
3136
3137         nesvnic = to_nesvnic(cm_id->device);
3138         if (!nesvnic)
3139                 return -EINVAL;
3140         adapter = nesvnic->nesdev->nesadapter;
3141         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3142                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3143
3144         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3145                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3146
3147         /* setup listen params in our api call struct */
3148         cm_info.loc_addr = nesvnic->local_ipaddr;
3149         cm_info.loc_port = cm_id->local_addr.sin_port;
3150         cm_info.backlog = backlog;
3151         cm_info.cm_id = cm_id;
3152
3153         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3154
3155
3156         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3157         if (!cm_node) {
3158                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3159                                 __func__, __LINE__);
3160                 return -ENOMEM;
3161         }
3162
3163         cm_id->provider_data = cm_node;
3164
3165         if (!cm_node->reused_node) {
3166                 err = nes_manage_apbvt(nesvnic,
3167                         ntohs(cm_id->local_addr.sin_port),
3168                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3169                         NES_MANAGE_APBVT_ADD);
3170                 if (err) {
3171                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3172                                 err);
3173                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3174                         return err;
3175                 }
3176                 atomic_inc(&cm_listens_created);
3177         }
3178
3179         cm_id->add_ref(cm_id);
3180         cm_id->provider_data = (void *)cm_node;
3181
3182
3183         return 0;
3184 }
3185
3186
3187 /**
3188  * nes_destroy_listen
3189  */
3190 int nes_destroy_listen(struct iw_cm_id *cm_id)
3191 {
3192         if (cm_id->provider_data)
3193                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3194         else
3195                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3196
3197         cm_id->rem_ref(cm_id);
3198
3199         return 0;
3200 }
3201
3202
3203 /**
3204  * nes_cm_recv
3205  */
3206 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3207 {
3208         int rc = 0;
3209         cm_packets_received++;
3210         if ((g_cm_core) && (g_cm_core->api)) {
3211                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3212         } else {
3213                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3214                                 " cm is not setup properly.\n");
3215         }
3216
3217         return rc;
3218 }
3219
3220
3221 /**
3222  * nes_cm_start
3223  * Start and init a cm core module
3224  */
3225 int nes_cm_start(void)
3226 {
3227         nes_debug(NES_DBG_CM, "\n");
3228         /* create the primary CM core, pass this handle to subsequent core inits */
3229         g_cm_core = nes_cm_alloc_core();
3230         if (g_cm_core) {
3231                 return 0;
3232         } else {
3233                 return -ENOMEM;
3234         }
3235 }
3236
3237
3238 /**
3239  * nes_cm_stop
3240  * stop and dealloc all cm core instances
3241  */
3242 int nes_cm_stop(void)
3243 {
3244         g_cm_core->api->destroy_cm_core(g_cm_core);
3245         return 0;
3246 }
3247
3248
3249 /**
3250  * cm_event_connected
3251  * handle a connected event, setup QPs and HW
3252  */
3253 static void cm_event_connected(struct nes_cm_event *event)
3254 {
3255         u64 u64temp;
3256         struct nes_qp *nesqp;
3257         struct nes_vnic *nesvnic;
3258         struct nes_device *nesdev;
3259         struct nes_cm_node *cm_node;
3260         struct nes_adapter *nesadapter;
3261         struct ib_qp_attr attr;
3262         struct iw_cm_id *cm_id;
3263         struct iw_cm_event cm_event;
3264         struct nes_hw_qp_wqe *wqe;
3265         struct nes_v4_quad nes_quad;
3266         u32 crc_value;
3267         int ret;
3268
3269         /* get all our handles */
3270         cm_node = event->cm_node;
3271         cm_id = cm_node->cm_id;
3272         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3273         nesqp = (struct nes_qp *)cm_id->provider_data;
3274         nesvnic = to_nesvnic(nesqp->ibqp.device);
3275         nesdev = nesvnic->nesdev;
3276         nesadapter = nesdev->nesadapter;
3277
3278         if (nesqp->destroyed) {
3279                 return;
3280         }
3281         atomic_inc(&cm_connecteds);
3282         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3283                         " local port 0x%04X. jiffies = %lu.\n",
3284                         nesqp->hwqp.qp_id,
3285                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3286                         ntohs(cm_id->remote_addr.sin_port),
3287                         ntohs(cm_id->local_addr.sin_port),
3288                         jiffies);
3289
3290         nes_cm_init_tsa_conn(nesqp, cm_node);
3291
3292         /* set the QP tsa context */
3293         nesqp->nesqp_context->tcpPorts[0] =
3294                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3295         nesqp->nesqp_context->tcpPorts[1] =
3296                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3297         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3298                 nesqp->nesqp_context->ip0 =
3299                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3300         else
3301                 nesqp->nesqp_context->ip0 =
3302                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3303
3304         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3305                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3306                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3307         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3308                         nes_arp_table(nesdev,
3309                         le32_to_cpu(nesqp->nesqp_context->ip0),
3310                         NULL, NES_ARP_RESOLVE) << 16);
3311         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3312                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3313         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3314         nesqp->nesqp_context->ird_ord_sizes |=
3315                         cpu_to_le32((u32)1 <<
3316                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3317
3318         /* Adjust tail for not having a LSMM */
3319         nesqp->hwqp.sq_tail = 1;
3320
3321 #if defined(NES_SEND_FIRST_WRITE)
3322         if (cm_node->send_write0) {
3323                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3324                 wqe = &nesqp->hwqp.sq_vbase[0];
3325                 u64temp = (unsigned long)nesqp;
3326                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3327                 set_wqe_64bit_value(wqe->wqe_words,
3328                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3329                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3330                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3331                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3332                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3333                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3334                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3335                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3336
3337                 if (nesqp->sq_kmapped) {
3338                         nesqp->sq_kmapped = 0;
3339                         kunmap(nesqp->page);
3340                 }
3341
3342                 /* use the reserved spot on the WQ for the extra first WQE */
3343                 nesqp->nesqp_context->ird_ord_sizes &=
3344                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3345                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3346                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3347                 nesqp->skip_lsmm = 1;
3348                 nesqp->hwqp.sq_tail = 0;
3349                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3350                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3351         }
3352 #endif
3353
3354         memset(&nes_quad, 0, sizeof(nes_quad));
3355
3356         nes_quad.DstIpAdrIndex =
3357                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3358         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3359                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3360         else
3361                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3362         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3363         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3364
3365         /* Produce hash key */
3366         crc_value = get_crc_value(&nes_quad);
3367         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3368         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3369                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3370
3371         nesqp->hte_index &= nesadapter->hte_index_mask;
3372         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3373
3374         nesqp->ietf_frame = &cm_node->mpa_frame;
3375         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3376         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3377
3378         /* notify OF layer we successfully created the requested connection */
3379         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3380         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3381         cm_event.provider_data = cm_id->provider_data;
3382         cm_event.local_addr.sin_family = AF_INET;
3383         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3384         cm_event.remote_addr = cm_id->remote_addr;
3385
3386         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3387         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3388
3389         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3390         ret = cm_id->event_handler(cm_id, &cm_event);
3391         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3392
3393         if (ret)
3394                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3395                         "ret=%d\n", __func__, __LINE__, ret);
3396         attr.qp_state = IB_QPS_RTS;
3397         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3398
3399         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3400                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3401
3402         return;
3403 }
3404
3405
3406 /**
3407  * cm_event_connect_error
3408  */
3409 static void cm_event_connect_error(struct nes_cm_event *event)
3410 {
3411         struct nes_qp *nesqp;
3412         struct iw_cm_id *cm_id;
3413         struct iw_cm_event cm_event;
3414         /* struct nes_cm_info cm_info; */
3415         int ret;
3416
3417         if (!event->cm_node)
3418                 return;
3419
3420         cm_id = event->cm_node->cm_id;
3421         if (!cm_id) {
3422                 return;
3423         }
3424
3425         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3426         nesqp = cm_id->provider_data;
3427
3428         if (!nesqp) {
3429                 return;
3430         }
3431
3432         /* notify OF layer about this connection error event */
3433         /* cm_id->rem_ref(cm_id); */
3434         nesqp->cm_id = NULL;
3435         cm_id->provider_data = NULL;
3436         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3437         cm_event.status = -ECONNRESET;
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         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3445                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3446                 cm_event.remote_addr.sin_addr.s_addr);
3447
3448         ret = cm_id->event_handler(cm_id, &cm_event);
3449         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3450         if (ret)
3451                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3452                         "ret=%d\n", __func__, __LINE__, ret);
3453         cm_id->rem_ref(cm_id);
3454
3455         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3456         return;
3457 }
3458
3459
3460 /**
3461  * cm_event_reset
3462  */
3463 static void cm_event_reset(struct nes_cm_event *event)
3464 {
3465         struct nes_qp *nesqp;
3466         struct iw_cm_id *cm_id;
3467         struct iw_cm_event cm_event;
3468         /* struct nes_cm_info cm_info; */
3469         int ret;
3470
3471         if (!event->cm_node)
3472                 return;
3473
3474         if (!event->cm_node->cm_id)
3475                 return;
3476
3477         cm_id = event->cm_node->cm_id;
3478
3479         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3480         nesqp = cm_id->provider_data;
3481         if (!nesqp)
3482                 return;
3483
3484         nesqp->cm_id = NULL;
3485         /* cm_id->provider_data = NULL; */
3486         cm_event.event = IW_CM_EVENT_DISCONNECT;
3487         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3488         cm_event.provider_data = cm_id->provider_data;
3489         cm_event.local_addr = cm_id->local_addr;
3490         cm_event.remote_addr = cm_id->remote_addr;
3491         cm_event.private_data = NULL;
3492         cm_event.private_data_len = 0;
3493
3494         cm_id->add_ref(cm_id);
3495         ret = cm_id->event_handler(cm_id, &cm_event);
3496         atomic_inc(&cm_closes);
3497         cm_event.event = IW_CM_EVENT_CLOSE;
3498         cm_event.status = IW_CM_EVENT_STATUS_OK;
3499         cm_event.provider_data = cm_id->provider_data;
3500         cm_event.local_addr = cm_id->local_addr;
3501         cm_event.remote_addr = cm_id->remote_addr;
3502         cm_event.private_data = NULL;
3503         cm_event.private_data_len = 0;
3504         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3505         ret = cm_id->event_handler(cm_id, &cm_event);
3506
3507         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3508
3509
3510         /* notify OF layer about this connection error event */
3511         cm_id->rem_ref(cm_id);
3512
3513         return;
3514 }
3515
3516
3517 /**
3518  * cm_event_mpa_req
3519  */
3520 static void cm_event_mpa_req(struct nes_cm_event *event)
3521 {
3522         struct iw_cm_id   *cm_id;
3523         struct iw_cm_event cm_event;
3524         int ret;
3525         struct nes_cm_node *cm_node;
3526
3527         cm_node = event->cm_node;
3528         if (!cm_node)
3529                 return;
3530         cm_id = cm_node->cm_id;
3531
3532         atomic_inc(&cm_connect_reqs);
3533         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3534                         cm_node, cm_id, jiffies);
3535
3536         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3537         cm_event.status = IW_CM_EVENT_STATUS_OK;
3538         cm_event.provider_data = (void *)cm_node;
3539
3540         cm_event.local_addr.sin_family = AF_INET;
3541         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3542         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3543
3544         cm_event.remote_addr.sin_family = AF_INET;
3545         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3546         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3547         cm_event.private_data = cm_node->mpa_frame_buf;
3548         cm_event.private_data_len  = (u8) cm_node->mpa_frame_size;
3549
3550         ret = cm_id->event_handler(cm_id, &cm_event);
3551         if (ret)
3552                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3553                                 __func__, __LINE__, ret);
3554         return;
3555 }
3556
3557
3558 static void cm_event_mpa_reject(struct nes_cm_event *event)
3559 {
3560         struct iw_cm_id   *cm_id;
3561         struct iw_cm_event cm_event;
3562         struct nes_cm_node *cm_node;
3563         int ret;
3564
3565         cm_node = event->cm_node;
3566         if (!cm_node)
3567                 return;
3568         cm_id = cm_node->cm_id;
3569
3570         atomic_inc(&cm_connect_reqs);
3571         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3572                         cm_node, cm_id, jiffies);
3573
3574         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3575         cm_event.status = -ECONNREFUSED;
3576         cm_event.provider_data = cm_id->provider_data;
3577
3578         cm_event.local_addr.sin_family = AF_INET;
3579         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3580         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3581
3582         cm_event.remote_addr.sin_family = AF_INET;
3583         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3584         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3585
3586         cm_event.private_data = cm_node->mpa_frame_buf;
3587         cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3588
3589         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3590                         "remove_addr=%08x\n",
3591                         cm_event.local_addr.sin_addr.s_addr,
3592                         cm_event.remote_addr.sin_addr.s_addr);
3593
3594         ret = cm_id->event_handler(cm_id, &cm_event);
3595         if (ret)
3596                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3597                                 __func__, __LINE__, ret);
3598
3599         return;
3600 }
3601
3602
3603 static void nes_cm_event_handler(struct work_struct *);
3604
3605 /**
3606  * nes_cm_post_event
3607  * post an event to the cm event handler
3608  */
3609 static int nes_cm_post_event(struct nes_cm_event *event)
3610 {
3611         atomic_inc(&event->cm_node->cm_core->events_posted);
3612         add_ref_cm_node(event->cm_node);
3613         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3614         INIT_WORK(&event->event_work, nes_cm_event_handler);
3615         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3616                 event->cm_node, event);
3617
3618         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3619
3620         nes_debug(NES_DBG_CM, "Exit\n");
3621         return 0;
3622 }
3623
3624
3625 /**
3626  * nes_cm_event_handler
3627  * worker function to handle cm events
3628  * will free instance of nes_cm_event
3629  */
3630 static void nes_cm_event_handler(struct work_struct *work)
3631 {
3632         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3633                         event_work);
3634         struct nes_cm_core *cm_core;
3635
3636         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3637                 return;
3638
3639         cm_core = event->cm_node->cm_core;
3640         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3641                 event, event->type, atomic_read(&cm_core->events_posted));
3642
3643         switch (event->type) {
3644         case NES_CM_EVENT_MPA_REQ:
3645                 cm_event_mpa_req(event);
3646                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3647                         event->cm_node);
3648                 break;
3649         case NES_CM_EVENT_RESET:
3650                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3651                         event->cm_node);
3652                 cm_event_reset(event);
3653                 break;
3654         case NES_CM_EVENT_CONNECTED:
3655                 if ((!event->cm_node->cm_id) ||
3656                         (event->cm_node->state != NES_CM_STATE_TSA))
3657                         break;
3658                 cm_event_connected(event);
3659                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3660                 break;
3661         case NES_CM_EVENT_MPA_REJECT:
3662                 if ((!event->cm_node->cm_id) ||
3663                                 (event->cm_node->state == NES_CM_STATE_TSA))
3664                         break;
3665                 cm_event_mpa_reject(event);
3666                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3667                 break;
3668
3669         case NES_CM_EVENT_ABORTED:
3670                 if ((!event->cm_node->cm_id) ||
3671                         (event->cm_node->state == NES_CM_STATE_TSA))
3672                         break;
3673                 cm_event_connect_error(event);
3674                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3675                 break;
3676         case NES_CM_EVENT_DROPPED_PKT:
3677                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3678                 break;
3679         default:
3680                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3681                 break;
3682         }
3683
3684         atomic_dec(&cm_core->events_posted);
3685         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3686         rem_ref_cm_node(cm_core, event->cm_node);
3687         kfree(event);
3688
3689         return;
3690 }