drivers/infiniband/hw/nes/nes_cm.c

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