drivers/infiniband/hw/nes/nes_cm.c

   1 /*
   2  * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34
  35 #define TCPOPT_TIMESTAMP 8
  36
  37 #include <linux/atomic.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/ip.h>
  40 #include <linux/tcp.h>
  41 #include <linux/init.h>
  42 #include <linux/if_arp.h>
  43 #include <linux/if_vlan.h>
  44 #include <linux/notifier.h>
  45 #include <linux/net.h>
  46 #include <linux/types.h>
  47 #include <linux/timer.h>
  48 #include <linux/time.h>
  49 #include <linux/delay.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/random.h>
  53 #include <linux/list.h>
  54 #include <linux/threads.h>
  55 #include <linux/highmem.h>
  56 #include <linux/slab.h>
  57 #include <net/arp.h>
  58 #include <net/neighbour.h>
  59 #include <net/route.h>
  60 #include <net/ip_fib.h>
  61 #include <net/tcp.h>
  62
  63 #include "nes.h"
  64
  65 u32 cm_packets_sent;
  66 u32 cm_packets_bounced;
  67 u32 cm_packets_dropped;
  68 u32 cm_packets_retrans;
  69 u32 cm_packets_created;
  70 u32 cm_packets_received;
  71 atomic_t cm_listens_created;
  72 atomic_t cm_listens_destroyed;
  73 u32 cm_backlog_drops;
  74 atomic_t cm_loopbacks;
  75 atomic_t cm_nodes_created;
  76 atomic_t cm_nodes_destroyed;
  77 atomic_t cm_accel_dropped_pkts;
  78 atomic_t cm_resets_recvd;
  79
  80 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
  81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
  82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
  83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, 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 nes_cm_node *);
  86 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
  87 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
  88 static int mini_cm_dealloc_core(struct nes_cm_core *);
  89 static int mini_cm_get(struct nes_cm_core *);
  90 static int mini_cm_set(struct nes_cm_core *, u32, u32);
  91
  92 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
  93 static int add_ref_cm_node(struct nes_cm_node *);
  94 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
  95
  96 static int nes_cm_disconn_true(struct nes_qp *);
  97 static int nes_cm_post_event(struct nes_cm_event *event);
  98 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
  99 static void nes_disconnect_worker(struct work_struct *work);
 100
 101 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
 102 static int send_mpa_reject(struct nes_cm_node *);
 103 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
 104 static int send_reset(struct nes_cm_node *, struct sk_buff *);
 105 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
 106 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
 107 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
 108
 109 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
 110 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
 111 static void cleanup_retrans_entry(struct nes_cm_node *);
 112 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
 113 static void free_retrans_entry(struct nes_cm_node *cm_node);
 114 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
 115
 116 /* CM event handler functions */
 117 static void cm_event_connected(struct nes_cm_event *);
 118 static void cm_event_connect_error(struct nes_cm_event *);
 119 static void cm_event_reset(struct nes_cm_event *);
 120 static void cm_event_mpa_req(struct nes_cm_event *);
 121 static void cm_event_mpa_reject(struct nes_cm_event *);
 122 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
 123
 124 /* MPA build functions */
 125 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
 126 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
 127 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
 128 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
 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 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
 160 {
 161         return add_ref_cm_node(cm_node);
 162 }
 163
 164 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
 165 {
 166         return rem_ref_cm_node(cm_node->cm_core, cm_node);
 167 }
 168
 169 /**
 170  * create_event
 171  */
 172 static struct nes_cm_event *create_event(struct nes_cm_node *   cm_node,
 173                                          enum nes_cm_event_type type)
 174 {
 175         struct nes_cm_event *event;
 176
 177         if (!cm_node->cm_id)
 178                 return NULL;
 179
 180         /* allocate an empty event */
 181         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 182
 183         if (!event)
 184                 return NULL;
 185
 186         event->type = type;
 187         event->cm_node = cm_node;
 188         event->cm_info.rem_addr = cm_node->rem_addr;
 189         event->cm_info.loc_addr = cm_node->loc_addr;
 190         event->cm_info.rem_port = cm_node->rem_port;
 191         event->cm_info.loc_port = cm_node->loc_port;
 192         event->cm_info.cm_id = cm_node->cm_id;
 193
 194         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
 195                   "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
 196                   cm_node, event, type, event->cm_info.loc_addr,
 197                   event->cm_info.loc_port, event->cm_info.rem_addr,
 198                   event->cm_info.rem_port);
 199
 200         nes_cm_post_event(event);
 201         return event;
 202 }
 203
 204
 205 /**
 206  * send_mpa_request
 207  */
 208 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
 209 {
 210         u8 start_addr = 0;
 211         u8 *start_ptr = &start_addr;
 212         u8 **start_buff = &start_ptr;
 213         u16 buff_len = 0;
 214
 215         if (!skb) {
 216                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
 217                 return -1;
 218         }
 219
 220         /* send an MPA Request frame */
 221         cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
 222         form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
 223
 224         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 225 }
 226
 227
 228
 229 static int send_mpa_reject(struct nes_cm_node *cm_node)
 230 {
 231         struct sk_buff *skb = NULL;
 232         u8 start_addr = 0;
 233         u8 *start_ptr = &start_addr;
 234         u8 **start_buff = &start_ptr;
 235         u16 buff_len = 0;
 236         struct ietf_mpa_v1 *mpa_frame;
 237
 238         skb = dev_alloc_skb(MAX_CM_BUFFER);
 239         if (!skb) {
 240                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 241                 return -ENOMEM;
 242         }
 243
 244         /* send an MPA reject frame */
 245         cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
 246         mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
 247         mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
 248         form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
 249
 250         cm_node->state = NES_CM_STATE_FIN_WAIT1;
 251         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 252 }
 253
 254
 255 /**
 256  * recv_mpa - process a received TCP pkt, we are expecting an
 257  * IETF MPA frame
 258  */
 259 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
 260                      u32 len)
 261 {
 262         struct ietf_mpa_v1 *mpa_frame;
 263         struct ietf_mpa_v2 *mpa_v2_frame;
 264         struct ietf_rtr_msg *rtr_msg;
 265         int mpa_hdr_len;
 266         int priv_data_len;
 267
 268         *type = NES_MPA_REQUEST_ACCEPT;
 269
 270         /* assume req frame is in tcp data payload */
 271         if (len < sizeof(struct ietf_mpa_v1)) {
 272                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
 273                 return -EINVAL;
 274         }
 275
 276         /* points to the beginning of the frame, which could be MPA V1 or V2 */
 277         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 278         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 279         priv_data_len = ntohs(mpa_frame->priv_data_len);
 280
 281         /* make sure mpa private data len is less than 512 bytes */
 282         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 283                 nes_debug(NES_DBG_CM, "The received Length of Private"
 284                           " Data field exceeds 512 octets\n");
 285                 return -EINVAL;
 286         }
 287         /*
 288          * make sure MPA receiver interoperate with the
 289          * received MPA version and MPA key information
 290          *
 291          */
 292         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 293                 nes_debug(NES_DBG_CM, "The received mpa version"
 294                           " is not supported\n");
 295                 return -EINVAL;
 296         }
 297         /*
 298         * backwards compatibility only
 299         */
 300         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 301                 nes_debug(NES_DBG_CM, "The received mpa version"
 302                         " can not be interoperated\n");
 303                 return -EINVAL;
 304         } else {
 305                 cm_node->mpa_frame_rev = mpa_frame->rev;
 306         }
 307
 308         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 309                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 310                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 311                         return -EINVAL;
 312                 }
 313         } else {
 314                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 315                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 316                         return -EINVAL;
 317                 }
 318         }
 319
 320
 321         if (priv_data_len + mpa_hdr_len != len) {
 322                 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
 323                         " complete (%x + %x != %x)\n",
 324                         priv_data_len, mpa_hdr_len, len);
 325                 return -EINVAL;
 326         }
 327         /* make sure it does not exceed the max size */
 328         if (len > MAX_CM_BUFFER) {
 329                 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
 330                         " (%x + %x != %x)\n",
 331                         priv_data_len, mpa_hdr_len, len);
 332                 return -EINVAL;
 333         }
 334
 335         cm_node->mpa_frame_size = priv_data_len;
 336
 337         switch (mpa_frame->rev) {
 338         case IETF_MPA_V2: {
 339                 u16 ird_size;
 340                 u16 ord_size;
 341                 u16 rtr_ctrl_ird;
 342                 u16 rtr_ctrl_ord;
 343
 344                 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
 345                 mpa_hdr_len += IETF_RTR_MSG_SIZE;
 346                 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
 347                 rtr_msg = &mpa_v2_frame->rtr_msg;
 348
 349                 /* parse rtr message */
 350                 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
 351                 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
 352                 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
 353                 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
 354
 355                 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
 356                         /* send reset */
 357                         return -EINVAL;
 358                 }
 359
 360                 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 361                         /* responder */
 362                         if (cm_node->ord_size > ird_size)
 363                                 cm_node->ord_size = ird_size;
 364                 } else {
 365                         /* initiator */
 366                         if (cm_node->ord_size > ird_size)
 367                                 cm_node->ord_size = ird_size;
 368
 369                         if (cm_node->ird_size < ord_size) {
 370                                 /* no resources available */
 371                                 /* send terminate message */
 372                                 return -EINVAL;
 373                         }
 374                 }
 375
 376                 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
 377                         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
 378                 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
 379                         cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
 380                 } else {        /* Not supported RDMA0 operation */
 381                         return -EINVAL;
 382                 }
 383                 break;
 384         }
 385         case IETF_MPA_V1:
 386         default:
 387                 break;
 388         }
 389
 390         /* copy entire MPA frame to our cm_node's frame */
 391         memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
 392
 393         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
 394                 *type = NES_MPA_REQUEST_REJECT;
 395         return 0;
 396 }
 397
 398
 399 /**
 400  * form_cm_frame - get a free packet and build empty frame Use
 401  * node info to build.
 402  */
 403 static void form_cm_frame(struct sk_buff *skb,
 404                           struct nes_cm_node *cm_node, void *options, u32 optionsize,
 405                           void *data, u32 datasize, u8 flags)
 406 {
 407         struct tcphdr *tcph;
 408         struct iphdr *iph;
 409         struct ethhdr *ethh;
 410         u8 *buf;
 411         u16 packetsize = sizeof(*iph);
 412
 413         packetsize += sizeof(*tcph);
 414         packetsize += optionsize + datasize;
 415
 416         skb_trim(skb, 0);
 417         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
 418
 419         buf = skb_put(skb, packetsize + ETH_HLEN);
 420
 421         ethh = (struct ethhdr *)buf;
 422         buf += ETH_HLEN;
 423
 424         iph = (struct iphdr *)buf;
 425         buf += sizeof(*iph);
 426         tcph = (struct tcphdr *)buf;
 427         skb_reset_mac_header(skb);
 428         skb_set_network_header(skb, ETH_HLEN);
 429         skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
 430         buf += sizeof(*tcph);
 431
 432         skb->ip_summed = CHECKSUM_PARTIAL;
 433         skb->protocol = htons(0x800);
 434         skb->data_len = 0;
 435         skb->mac_len = ETH_HLEN;
 436
 437         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 438         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 439         ethh->h_proto = htons(0x0800);
 440
 441         iph->version = IPVERSION;
 442         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 443         iph->tos = 0;
 444         iph->tot_len = htons(packetsize);
 445         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 446
 447         iph->frag_off = htons(0x4000);
 448         iph->ttl = 0x40;
 449         iph->protocol = 0x06;   /* IPPROTO_TCP */
 450
 451         iph->saddr = htonl(cm_node->loc_addr);
 452         iph->daddr = htonl(cm_node->rem_addr);
 453
 454         tcph->source = htons(cm_node->loc_port);
 455         tcph->dest = htons(cm_node->rem_port);
 456         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 457
 458         if (flags & SET_ACK) {
 459                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 460                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 461                 tcph->ack = 1;
 462         } else {
 463                 tcph->ack_seq = 0;
 464         }
 465
 466         if (flags & SET_SYN) {
 467                 cm_node->tcp_cntxt.loc_seq_num++;
 468                 tcph->syn = 1;
 469         } else {
 470                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 471         }
 472
 473         if (flags & SET_FIN) {
 474                 cm_node->tcp_cntxt.loc_seq_num++;
 475                 tcph->fin = 1;
 476         }
 477
 478         if (flags & SET_RST)
 479                 tcph->rst = 1;
 480
 481         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 482         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 483         tcph->urg_ptr = 0;
 484         if (optionsize)
 485                 memcpy(buf, options, optionsize);
 486         buf += optionsize;
 487         if (datasize)
 488                 memcpy(buf, data, datasize);
 489
 490         skb_shinfo(skb)->nr_frags = 0;
 491         cm_packets_created++;
 492 }
 493
 494 /**
 495  * print_core - dump a cm core
 496  */
 497 static void print_core(struct nes_cm_core *core)
 498 {
 499         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 500         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 501         if (!core)
 502                 return;
 503         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 504
 505         nes_debug(NES_DBG_CM, "State         : %u \n", core->state);
 506
 507         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 508         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 509
 510         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 511
 512         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 513 }
 514
 515 /**
 516  * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
 517  */
 518 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
 519                               u16 *buff_len, u8 *pci_mem, u8 mpa_key)
 520 {
 521         int ret = 0;
 522
 523         *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
 524
 525         switch (cm_node->mpa_frame_rev) {
 526         case IETF_MPA_V1:
 527                 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
 528                 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
 529                 build_mpa_v1(cm_node, *start_buff, mpa_key);
 530                 break;
 531         case IETF_MPA_V2:
 532                 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
 533                 build_mpa_v2(cm_node, *start_buff, mpa_key);
 534                 break;
 535         default:
 536                 ret = -EINVAL;
 537         }
 538         return ret;
 539 }
 540
 541 /**
 542  * build_mpa_v2 - build a MPA V2 frame
 543  */
 544 static void build_mpa_v2(struct nes_cm_node *cm_node,
 545                          void *start_addr, u8 mpa_key)
 546 {
 547         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 548         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 549         u16 ctrl_ird;
 550         u16 ctrl_ord;
 551
 552         /* initialize the upper 5 bytes of the frame */
 553         build_mpa_v1(cm_node, start_addr, mpa_key);
 554         mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
 555         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 556
 557         /* initialize RTR msg */
 558         ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 559                             IETF_NO_IRD_ORD : cm_node->ird_size;
 560         ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 561                             IETF_NO_IRD_ORD : cm_node->ord_size;
 562
 563         ctrl_ird |= IETF_PEER_TO_PEER;
 564         ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 565
 566         switch (mpa_key) {
 567         case MPA_KEY_REQUEST:
 568                 ctrl_ord |= IETF_RDMA0_WRITE;
 569                 ctrl_ord |= IETF_RDMA0_READ;
 570                 break;
 571         case MPA_KEY_REPLY:
 572                 switch (cm_node->send_rdma0_op) {
 573                 case SEND_RDMA_WRITE_ZERO:
 574                         ctrl_ord |= IETF_RDMA0_WRITE;
 575                         break;
 576                 case SEND_RDMA_READ_ZERO:
 577                         ctrl_ord |= IETF_RDMA0_READ;
 578                         break;
 579                 }
 580         }
 581         rtr_msg->ctrl_ird = htons(ctrl_ird);
 582         rtr_msg->ctrl_ord = htons(ctrl_ord);
 583 }
 584
 585 /**
 586  * build_mpa_v1 - build a MPA V1 frame
 587  */
 588 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
 589 {
 590         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 591
 592         switch (mpa_key) {
 593         case MPA_KEY_REQUEST:
 594                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 595                 break;
 596         case MPA_KEY_REPLY:
 597                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 598                 break;
 599         }
 600         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 601         mpa_frame->rev = cm_node->mpa_frame_rev;
 602         mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
 603 }
 604
 605 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
 606 {
 607         u64 u64temp;
 608         struct nes_qp *nesqp = *nesqp_addr;
 609         struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
 610
 611         u64temp = (unsigned long)nesqp;
 612         u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
 613         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
 614
 615         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
 616         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
 617
 618         switch (cm_node->send_rdma0_op) {
 619         case SEND_RDMA_WRITE_ZERO:
 620                 nes_debug(NES_DBG_CM, "Sending first write.\n");
 621                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
 622                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
 623                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
 624                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
 625                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
 626                 break;
 627
 628         case SEND_RDMA_READ_ZERO:
 629         default:
 630                 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO) {
 631                         printk(KERN_ERR "%s[%u]: Unsupported RDMA0 len operation=%u\n",
 632                                  __func__, __LINE__, cm_node->send_rdma0_op);
 633                         WARN_ON(1);
 634                 }
 635                 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
 636                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
 637                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
 638                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
 639                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
 640                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
 641                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
 642                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
 643                 break;
 644         }
 645
 646         if (nesqp->sq_kmapped) {
 647                 nesqp->sq_kmapped = 0;
 648                 kunmap(nesqp->page);
 649         }
 650
 651         /*use the reserved spot on the WQ for the extra first WQE*/
 652         nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
 653                                                              NES_QPCONTEXT_ORDIRD_WRPDU |
 654                                                              NES_QPCONTEXT_ORDIRD_ALSMM));
 655         nesqp->skip_lsmm = 1;
 656         nesqp->hwqp.sq_tail = 0;
 657 }
 658
 659 /**
 660  * schedule_nes_timer
 661  * note - cm_node needs to be protected before calling this. Encase in:
 662  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
 663  */
 664 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 665                        enum nes_timer_type type, int send_retrans,
 666                        int close_when_complete)
 667 {
 668         unsigned long flags;
 669         struct nes_cm_core *cm_core = cm_node->cm_core;
 670         struct nes_timer_entry *new_send;
 671         int ret = 0;
 672         u32 was_timer_set;
 673
 674         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 675         if (!new_send)
 676                 return -ENOMEM;
 677
 678         /* new_send->timetosend = currenttime */
 679         new_send->retrycount = NES_DEFAULT_RETRYS;
 680         new_send->retranscount = NES_DEFAULT_RETRANS;
 681         new_send->skb = skb;
 682         new_send->timetosend = jiffies;
 683         new_send->type = type;
 684         new_send->netdev = cm_node->netdev;
 685         new_send->send_retrans = send_retrans;
 686         new_send->close_when_complete = close_when_complete;
 687
 688         if (type == NES_TIMER_TYPE_CLOSE) {
 689                 new_send->timetosend += (HZ / 10);
 690                 if (cm_node->recv_entry) {
 691                         kfree(new_send);
 692                         WARN_ON(1);
 693                         return -EINVAL;
 694                 }
 695                 cm_node->recv_entry = new_send;
 696         }
 697
 698         if (type == NES_TIMER_TYPE_SEND) {
 699                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 700                 atomic_inc(&new_send->skb->users);
 701                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 702                 cm_node->send_entry = new_send;
 703                 add_ref_cm_node(cm_node);
 704                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 705                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 706
 707                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 708                 if (ret != NETDEV_TX_OK) {
 709                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 710                                   "(jiffies = %lu)\n", new_send, jiffies);
 711                         new_send->timetosend = jiffies;
 712                         ret = NETDEV_TX_OK;
 713                 } else {
 714                         cm_packets_sent++;
 715                         if (!send_retrans) {
 716                                 cleanup_retrans_entry(cm_node);
 717                                 if (close_when_complete)
 718                                         rem_ref_cm_node(cm_core, cm_node);
 719                                 return ret;
 720                         }
 721                 }
 722         }
 723
 724         was_timer_set = timer_pending(&cm_core->tcp_timer);
 725
 726         if (!was_timer_set) {
 727                 cm_core->tcp_timer.expires = new_send->timetosend;
 728                 add_timer(&cm_core->tcp_timer);
 729         }
 730
 731         return ret;
 732 }
 733
 734 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 735 {
 736         struct iw_cm_id *cm_id = cm_node->cm_id;
 737         enum nes_cm_node_state state = cm_node->state;
 738         cm_node->state = NES_CM_STATE_CLOSED;
 739
 740         switch (state) {
 741         case NES_CM_STATE_SYN_RCVD:
 742         case NES_CM_STATE_CLOSING:
 743                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 744                 break;
 745         case NES_CM_STATE_LAST_ACK:
 746         case NES_CM_STATE_FIN_WAIT1:
 747                 if (cm_node->cm_id)
 748                         cm_id->rem_ref(cm_id);
 749                 send_reset(cm_node, NULL);
 750                 break;
 751         default:
 752                 add_ref_cm_node(cm_node);
 753                 send_reset(cm_node, NULL);
 754                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 755         }
 756 }
 757
 758 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 759 {
 760         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 761         struct iw_cm_id *cm_id = cm_node->cm_id;
 762         struct nes_qp *nesqp;
 763         unsigned long qplockflags;
 764
 765         if (!recv_entry)
 766                 return;
 767         nesqp = (struct nes_qp *)recv_entry->skb;
 768         if (nesqp) {
 769                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 770                 if (nesqp->cm_id) {
 771                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 772                                   "refcount = %d: HIT A "
 773                                   "NES_TIMER_TYPE_CLOSE with something "
 774                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 775                                   atomic_read(&nesqp->refcount));
 776                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 777                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 778                         nesqp->ibqp_state = IB_QPS_ERR;
 779                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 780                         nes_cm_disconn(nesqp);
 781                 } else {
 782                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 783                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 784                                   "refcount = %d: HIT A "
 785                                   "NES_TIMER_TYPE_CLOSE with nothing "
 786                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 787                                   atomic_read(&nesqp->refcount));
 788                 }
 789         } else if (rem_node) {
 790                 /* TIME_WAIT state */
 791                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 792         }
 793         if (cm_node->cm_id)
 794                 cm_id->rem_ref(cm_id);
 795         kfree(recv_entry);
 796         cm_node->recv_entry = NULL;
 797 }
 798
 799 /**
 800  * nes_cm_timer_tick
 801  */
 802 static void nes_cm_timer_tick(unsigned long pass)
 803 {
 804         unsigned long flags;
 805         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 806         struct nes_cm_node *cm_node;
 807         struct nes_timer_entry *send_entry, *recv_entry;
 808         struct list_head *list_core_temp;
 809         struct list_head *list_node;
 810         struct nes_cm_core *cm_core = g_cm_core;
 811         u32 settimer = 0;
 812         unsigned long timetosend;
 813         int ret = NETDEV_TX_OK;
 814
 815         struct list_head timer_list;
 816
 817         INIT_LIST_HEAD(&timer_list);
 818         spin_lock_irqsave(&cm_core->ht_lock, flags);
 819
 820         list_for_each_safe(list_node, list_core_temp,
 821                            &cm_core->connected_nodes) {
 822                 cm_node = container_of(list_node, struct nes_cm_node, list);
 823                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 824                         add_ref_cm_node(cm_node);
 825                         list_add(&cm_node->timer_entry, &timer_list);
 826                 }
 827         }
 828         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 829
 830         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 831                 cm_node = container_of(list_node, struct nes_cm_node,
 832                                        timer_entry);
 833                 recv_entry = cm_node->recv_entry;
 834
 835                 if (recv_entry) {
 836                         if (time_after(recv_entry->timetosend, jiffies)) {
 837                                 if (nexttimeout > recv_entry->timetosend ||
 838                                     !settimer) {
 839                                         nexttimeout = recv_entry->timetosend;
 840                                         settimer = 1;
 841                                 }
 842                         } else {
 843                                 handle_recv_entry(cm_node, 1);
 844                         }
 845                 }
 846
 847                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 848                 do {
 849                         send_entry = cm_node->send_entry;
 850                         if (!send_entry)
 851                                 break;
 852                         if (time_after(send_entry->timetosend, jiffies)) {
 853                                 if (cm_node->state != NES_CM_STATE_TSA) {
 854                                         if ((nexttimeout >
 855                                              send_entry->timetosend) ||
 856                                             !settimer) {
 857                                                 nexttimeout =
 858                                                         send_entry->timetosend;
 859                                                 settimer = 1;
 860                                         }
 861                                 } else {
 862                                         free_retrans_entry(cm_node);
 863                                 }
 864                                 break;
 865                         }
 866
 867                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 868                             (cm_node->state == NES_CM_STATE_CLOSED)) {
 869                                 free_retrans_entry(cm_node);
 870                                 break;
 871                         }
 872
 873                         if (!send_entry->retranscount ||
 874                             !send_entry->retrycount) {
 875                                 cm_packets_dropped++;
 876                                 free_retrans_entry(cm_node);
 877
 878                                 spin_unlock_irqrestore(
 879                                         &cm_node->retrans_list_lock, flags);
 880                                 nes_retrans_expired(cm_node);
 881                                 cm_node->state = NES_CM_STATE_CLOSED;
 882                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 883                                                   flags);
 884                                 break;
 885                         }
 886                         atomic_inc(&send_entry->skb->users);
 887                         cm_packets_retrans++;
 888                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 889                                   "for node %p, jiffies = %lu, time to send = "
 890                                   "%lu, retranscount = %u, send_entry->seq_num = "
 891                                   "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 892                                   "0x%08X\n", send_entry, cm_node, jiffies,
 893                                   send_entry->timetosend,
 894                                   send_entry->retranscount,
 895                                   send_entry->seq_num,
 896                                   cm_node->tcp_cntxt.rem_ack_num);
 897
 898                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 899                                                flags);
 900                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 901                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 902                         if (ret != NETDEV_TX_OK) {
 903                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 904                                           "node=%p\n", cm_node);
 905                                 cm_packets_bounced++;
 906                                 send_entry->retrycount--;
 907                                 nexttimeout = jiffies + NES_SHORT_TIME;
 908                                 settimer = 1;
 909                                 break;
 910                         } else {
 911                                 cm_packets_sent++;
 912                         }
 913                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 914                                   "%u, retry count = %u.\n",
 915                                   send_entry->retranscount,
 916                                   send_entry->retrycount);
 917                         if (send_entry->send_retrans) {
 918                                 send_entry->retranscount--;
 919                                 timetosend = (NES_RETRY_TIMEOUT <<
 920                                               (NES_DEFAULT_RETRANS - send_entry->retranscount));
 921
 922                                 send_entry->timetosend = jiffies +
 923                                                          min(timetosend, NES_MAX_TIMEOUT);
 924                                 if (nexttimeout > send_entry->timetosend ||
 925                                     !settimer) {
 926                                         nexttimeout = send_entry->timetosend;
 927                                         settimer = 1;
 928                                 }
 929                         } else {
 930                                 int close_when_complete;
 931                                 close_when_complete =
 932                                         send_entry->close_when_complete;
 933                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 934                                           cm_node, cm_node->state);
 935                                 free_retrans_entry(cm_node);
 936                                 if (close_when_complete)
 937                                         rem_ref_cm_node(cm_node->cm_core,
 938                                                         cm_node);
 939                         }
 940                 } while (0);
 941
 942                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 943                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 944         }
 945
 946         if (settimer) {
 947                 if (!timer_pending(&cm_core->tcp_timer)) {
 948                         cm_core->tcp_timer.expires = nexttimeout;
 949                         add_timer(&cm_core->tcp_timer);
 950                 }
 951         }
 952 }
 953
 954
 955 /**
 956  * send_syn
 957  */
 958 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 959                     struct sk_buff *skb)
 960 {
 961         int ret;
 962         int flags = SET_SYN;
 963         char optionsbuffer[sizeof(struct option_mss) +
 964                            sizeof(struct option_windowscale) + sizeof(struct option_base) +
 965                            TCP_OPTIONS_PADDING];
 966
 967         int optionssize = 0;
 968         /* Sending MSS option */
 969         union all_known_options *options;
 970
 971         if (!cm_node)
 972                 return -EINVAL;
 973
 974         options = (union all_known_options *)&optionsbuffer[optionssize];
 975         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 976         options->as_mss.length = sizeof(struct option_mss);
 977         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 978         optionssize += sizeof(struct option_mss);
 979
 980         options = (union all_known_options *)&optionsbuffer[optionssize];
 981         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 982         options->as_windowscale.length = sizeof(struct option_windowscale);
 983         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 984         optionssize += sizeof(struct option_windowscale);
 985
 986         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 987                 options = (union all_known_options *)&optionsbuffer[optionssize];
 988                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 989                 options->as_base.length = sizeof(struct option_base);
 990                 optionssize += sizeof(struct option_base);
 991                 /* we need the size to be a multiple of 4 */
 992                 options = (union all_known_options *)&optionsbuffer[optionssize];
 993                 options->as_end = 1;
 994                 optionssize += 1;
 995                 options = (union all_known_options *)&optionsbuffer[optionssize];
 996                 options->as_end = 1;
 997                 optionssize += 1;
 998         }
 999
1000         options = (union all_known_options *)&optionsbuffer[optionssize];
1001         options->as_end = OPTION_NUMBER_END;
1002         optionssize += 1;
1003
1004         if (!skb)
1005                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1006         if (!skb) {
1007                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1008                 return -1;
1009         }
1010
1011         if (sendack)
1012                 flags |= SET_ACK;
1013
1014         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1015         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1016
1017         return ret;
1018 }
1019
1020
1021 /**
1022  * send_reset
1023  */
1024 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1025 {
1026         int ret;
1027         int flags = SET_RST | SET_ACK;
1028
1029         if (!skb)
1030                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1031         if (!skb) {
1032                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1033                 return -ENOMEM;
1034         }
1035
1036         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1037         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1038
1039         return ret;
1040 }
1041
1042
1043 /**
1044  * send_ack
1045  */
1046 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1047 {
1048         int ret;
1049
1050         if (!skb)
1051                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1052
1053         if (!skb) {
1054                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1055                 return -1;
1056         }
1057
1058         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1059         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1060
1061         return ret;
1062 }
1063
1064
1065 /**
1066  * send_fin
1067  */
1068 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1069 {
1070         int ret;
1071
1072         /* if we didn't get a frame get one */
1073         if (!skb)
1074                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1075
1076         if (!skb) {
1077                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1078                 return -1;
1079         }
1080
1081         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1082         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1083
1084         return ret;
1085 }
1086
1087
1088 /**
1089  * find_node - find a cm node that matches the reference cm node
1090  */
1091 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1092                                      u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1093 {
1094         unsigned long flags;
1095         struct list_head *hte;
1096         struct nes_cm_node *cm_node;
1097
1098         /* get a handle on the hte */
1099         hte = &cm_core->connected_nodes;
1100
1101         /* walk list and find cm_node associated with this session ID */
1102         spin_lock_irqsave(&cm_core->ht_lock, flags);
1103         list_for_each_entry(cm_node, hte, list) {
1104                 /* compare quad, return node handle if a match */
1105                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1106                           cm_node->loc_addr, cm_node->loc_port,
1107                           loc_addr, loc_port,
1108                           cm_node->rem_addr, cm_node->rem_port,
1109                           rem_addr, rem_port);
1110                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
1111                     (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
1112                         add_ref_cm_node(cm_node);
1113                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1114                         return cm_node;
1115                 }
1116         }
1117         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1118
1119         /* no owner node */
1120         return NULL;
1121 }
1122
1123
1124 /**
1125  * find_listener - find a cm node listening on this addr-port pair
1126  */
1127 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1128                                              nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
1129 {
1130         unsigned long flags;
1131         struct nes_cm_listener *listen_node;
1132
1133         /* walk list and find cm_node associated with this session ID */
1134         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1135         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1136                 /* compare node pair, return node handle if a match */
1137                 if (((listen_node->loc_addr == dst_addr) ||
1138                      listen_node->loc_addr == 0x00000000) &&
1139                     (listen_node->loc_port == dst_port) &&
1140                     (listener_state & listen_node->listener_state)) {
1141                         atomic_inc(&listen_node->ref_count);
1142                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1143                         return listen_node;
1144                 }
1145         }
1146         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1147
1148         /* no listener */
1149         return NULL;
1150 }
1151
1152
1153 /**
1154  * add_hte_node - add a cm node to the hash table
1155  */
1156 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1157 {
1158         unsigned long flags;
1159         struct list_head *hte;
1160
1161         if (!cm_node || !cm_core)
1162                 return -EINVAL;
1163
1164         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1165                   cm_node);
1166
1167         spin_lock_irqsave(&cm_core->ht_lock, flags);
1168
1169         /* get a handle on the hash table element (list head for this slot) */
1170         hte = &cm_core->connected_nodes;
1171         list_add_tail(&cm_node->list, hte);
1172         atomic_inc(&cm_core->ht_node_cnt);
1173
1174         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1175
1176         return 0;
1177 }
1178
1179
1180 /**
1181  * mini_cm_dec_refcnt_listen
1182  */
1183 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1184                                      struct nes_cm_listener *listener, int free_hanging_nodes)
1185 {
1186         int ret = -EINVAL;
1187         int err = 0;
1188         unsigned long flags;
1189         struct list_head *list_pos = NULL;
1190         struct list_head *list_temp = NULL;
1191         struct nes_cm_node *cm_node = NULL;
1192         struct list_head reset_list;
1193
1194         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1195                   "refcnt=%d\n", listener, free_hanging_nodes,
1196                   atomic_read(&listener->ref_count));
1197         /* free non-accelerated child nodes for this listener */
1198         INIT_LIST_HEAD(&reset_list);
1199         if (free_hanging_nodes) {
1200                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1201                 list_for_each_safe(list_pos, list_temp,
1202                                    &g_cm_core->connected_nodes) {
1203                         cm_node = container_of(list_pos, struct nes_cm_node,
1204                                                list);
1205                         if ((cm_node->listener == listener) &&
1206                             (!cm_node->accelerated)) {
1207                                 add_ref_cm_node(cm_node);
1208                                 list_add(&cm_node->reset_entry, &reset_list);
1209                         }
1210                 }
1211                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1212         }
1213
1214         list_for_each_safe(list_pos, list_temp, &reset_list) {
1215                 cm_node = container_of(list_pos, struct nes_cm_node,
1216                                        reset_entry);
1217                 {
1218                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
1219                         enum nes_cm_node_state old_state;
1220                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1221                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1222                         } else {
1223                                 if (!loopback) {
1224                                         cleanup_retrans_entry(cm_node);
1225                                         err = send_reset(cm_node, NULL);
1226                                         if (err) {
1227                                                 cm_node->state =
1228                                                         NES_CM_STATE_CLOSED;
1229                                                 WARN_ON(1);
1230                                         } else {
1231                                                 old_state = cm_node->state;
1232                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1233                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1234                                                         rem_ref_cm_node(
1235                                                                 cm_node->cm_core,
1236                                                                 cm_node);
1237                                         }
1238                                 } else {
1239                                         struct nes_cm_event event;
1240
1241                                         event.cm_node = loopback;
1242                                         event.cm_info.rem_addr =
1243                                                         loopback->rem_addr;
1244                                         event.cm_info.loc_addr =
1245                                                         loopback->loc_addr;
1246                                         event.cm_info.rem_port =
1247                                                         loopback->rem_port;
1248                                         event.cm_info.loc_port =
1249                                                          loopback->loc_port;
1250                                         event.cm_info.cm_id = loopback->cm_id;
1251                                         add_ref_cm_node(loopback);
1252                                         loopback->state = NES_CM_STATE_CLOSED;
1253                                         cm_event_connect_error(&event);
1254                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1255
1256                                         rem_ref_cm_node(cm_node->cm_core,
1257                                                          cm_node);
1258
1259                                 }
1260                         }
1261                 }
1262         }
1263
1264         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1265         if (!atomic_dec_return(&listener->ref_count)) {
1266                 list_del(&listener->list);
1267
1268                 /* decrement our listen node count */
1269                 atomic_dec(&cm_core->listen_node_cnt);
1270
1271                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1272
1273                 if (listener->nesvnic)
1274                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1275                                          PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1276
1277                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1278
1279                 kfree(listener);
1280                 listener = NULL;
1281                 ret = 0;
1282                 atomic_inc(&cm_listens_destroyed);
1283         } else {
1284                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1285         }
1286         if (listener) {
1287                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1288                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1289                                   " with non-zero pending accepts=%u\n",
1290                                   listener, atomic_read(&listener->pend_accepts_cnt));
1291         }
1292
1293         return ret;
1294 }
1295
1296
1297 /**
1298  * mini_cm_del_listen
1299  */
1300 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1301                               struct nes_cm_listener *listener)
1302 {
1303         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1304         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1305         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1306 }
1307
1308
1309 /**
1310  * mini_cm_accelerated
1311  */
1312 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1313                                       struct nes_cm_node *cm_node)
1314 {
1315         u32 was_timer_set;
1316
1317         cm_node->accelerated = 1;
1318
1319         if (cm_node->accept_pend) {
1320                 BUG_ON(!cm_node->listener);
1321                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1322                 cm_node->accept_pend = 0;
1323                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1324         }
1325
1326         was_timer_set = timer_pending(&cm_core->tcp_timer);
1327         if (!was_timer_set) {
1328                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1329                 add_timer(&cm_core->tcp_timer);
1330         }
1331
1332         return 0;
1333 }
1334
1335
1336 /**
1337  * nes_addr_resolve_neigh
1338  */
1339 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1340 {
1341         struct rtable *rt;
1342         struct neighbour *neigh;
1343         int rc = arpindex;
1344         struct net_device *netdev;
1345         struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1346
1347         rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1348         if (IS_ERR(rt)) {
1349                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1350                        __func__, dst_ip);
1351                 return rc;
1352         }
1353
1354         if (netif_is_bond_slave(nesvnic->netdev))
1355                 netdev = nesvnic->netdev->master;
1356         else
1357                 netdev = nesvnic->netdev;
1358
1359         neigh = dst_neigh_lookup(&rt->dst, &dst_ip);
1360
1361         rcu_read_lock();
1362         if (neigh) {
1363                 if (neigh->nud_state & NUD_VALID) {
1364                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1365                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1366                                   neigh->ha, ntohl(rt->rt_gateway));
1367
1368                         if (arpindex >= 0) {
1369                                 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1370                                             neigh->ha, ETH_ALEN)) {
1371                                         /* Mac address same as in nes_arp_table */
1372                                         goto out;
1373                                 }
1374
1375                                 nes_manage_arp_cache(nesvnic->netdev,
1376                                                      nesadapter->arp_table[arpindex].mac_addr,
1377                                                      dst_ip, NES_ARP_DELETE);
1378                         }
1379
1380                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1381                                              dst_ip, NES_ARP_ADD);
1382                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1383                                            NES_ARP_RESOLVE);
1384                 } else {
1385                         neigh_event_send(neigh, NULL);
1386                 }
1387         }
1388 out:
1389         rcu_read_unlock();
1390
1391         if (neigh)
1392                 neigh_release(neigh);
1393
1394         ip_rt_put(rt);
1395         return rc;
1396 }
1397
1398 /**
1399  * make_cm_node - create a new instance of a cm node
1400  */
1401 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1402                                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1403                                         struct nes_cm_listener *listener)
1404 {
1405         struct nes_cm_node *cm_node;
1406         struct timespec ts;
1407         int oldarpindex = 0;
1408         int arpindex = 0;
1409         struct nes_device *nesdev;
1410         struct nes_adapter *nesadapter;
1411
1412         /* create an hte and cm_node for this instance */
1413         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1414         if (!cm_node)
1415                 return NULL;
1416
1417         /* set our node specific transport info */
1418         cm_node->loc_addr = cm_info->loc_addr;
1419         cm_node->rem_addr = cm_info->rem_addr;
1420         cm_node->loc_port = cm_info->loc_port;
1421         cm_node->rem_port = cm_info->rem_port;
1422
1423         cm_node->mpa_frame_rev = mpa_version;
1424         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1425         cm_node->ird_size = IETF_NO_IRD_ORD;
1426         cm_node->ord_size = IETF_NO_IRD_ORD;
1427
1428         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1429                   &cm_node->loc_addr, cm_node->loc_port,
1430                   &cm_node->rem_addr, cm_node->rem_port);
1431         cm_node->listener = listener;
1432         cm_node->netdev = nesvnic->netdev;
1433         cm_node->cm_id = cm_info->cm_id;
1434         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1435
1436         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1437                   cm_node->cm_id);
1438
1439         spin_lock_init(&cm_node->retrans_list_lock);
1440
1441         cm_node->loopbackpartner = NULL;
1442         atomic_set(&cm_node->ref_count, 1);
1443         /* associate our parent CM core */
1444         cm_node->cm_core = cm_core;
1445         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1446         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1447         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1448                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1449         ts = current_kernel_time();
1450         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1451         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1452                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1453         cm_node->tcp_cntxt.rcv_nxt = 0;
1454         /* get a unique session ID , add thread_id to an upcounter to handle race */
1455         atomic_inc(&cm_core->node_cnt);
1456         cm_node->conn_type = cm_info->conn_type;
1457         cm_node->apbvt_set = 0;
1458         cm_node->accept_pend = 0;
1459
1460         cm_node->nesvnic = nesvnic;
1461         /* get some device handles, for arp lookup */
1462         nesdev = nesvnic->nesdev;
1463         nesadapter = nesdev->nesadapter;
1464
1465         cm_node->loopbackpartner = NULL;
1466
1467         /* get the mac addr for the remote node */
1468         if (ipv4_is_loopback(htonl(cm_node->rem_addr))) {
1469                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1470         } else {
1471                 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1472                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1473         }
1474         if (arpindex < 0) {
1475                 kfree(cm_node);
1476                 return NULL;
1477         }
1478
1479         /* copy the mac addr to node context */
1480         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1481         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1482                   cm_node->rem_mac);
1483
1484         add_hte_node(cm_core, cm_node);
1485         atomic_inc(&cm_nodes_created);
1486
1487         return cm_node;
1488 }
1489
1490
1491 /**
1492  * add_ref_cm_node - destroy an instance of a cm node
1493  */
1494 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1495 {
1496         atomic_inc(&cm_node->ref_count);
1497         return 0;
1498 }
1499
1500
1501 /**
1502  * rem_ref_cm_node - destroy an instance of a cm node
1503  */
1504 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1505                            struct nes_cm_node *cm_node)
1506 {
1507         unsigned long flags;
1508         struct nes_qp *nesqp;
1509
1510         if (!cm_node)
1511                 return -EINVAL;
1512
1513         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1514         if (atomic_dec_return(&cm_node->ref_count)) {
1515                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1516                 return 0;
1517         }
1518         list_del(&cm_node->list);
1519         atomic_dec(&cm_core->ht_node_cnt);
1520         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1521
1522         /* if the node is destroyed before connection was accelerated */
1523         if (!cm_node->accelerated && cm_node->accept_pend) {
1524                 BUG_ON(!cm_node->listener);
1525                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1526                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1527         }
1528         WARN_ON(cm_node->send_entry);
1529         if (cm_node->recv_entry)
1530                 handle_recv_entry(cm_node, 0);
1531         if (cm_node->listener) {
1532                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1533         } else {
1534                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1535                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1536                                          PCI_FUNC(
1537                                                  cm_node->nesvnic->nesdev->pcidev->devfn),
1538                                          NES_MANAGE_APBVT_DEL);
1539                 }
1540         }
1541
1542         atomic_dec(&cm_core->node_cnt);
1543         atomic_inc(&cm_nodes_destroyed);
1544         nesqp = cm_node->nesqp;
1545         if (nesqp) {
1546                 nesqp->cm_node = NULL;
1547                 nes_rem_ref(&nesqp->ibqp);
1548                 cm_node->nesqp = NULL;
1549         }
1550
1551         kfree(cm_node);
1552         return 0;
1553 }
1554
1555 /**
1556  * process_options
1557  */
1558 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1559                            u32 optionsize, u32 syn_packet)
1560 {
1561         u32 tmp;
1562         u32 offset = 0;
1563         union all_known_options *all_options;
1564         char got_mss_option = 0;
1565
1566         while (offset < optionsize) {
1567                 all_options = (union all_known_options *)(optionsloc + offset);
1568                 switch (all_options->as_base.optionnum) {
1569                 case OPTION_NUMBER_END:
1570                         offset = optionsize;
1571                         break;
1572                 case OPTION_NUMBER_NONE:
1573                         offset += 1;
1574                         continue;
1575                 case OPTION_NUMBER_MSS:
1576                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1577                                   "Size: %d\n", __func__,
1578                                   all_options->as_mss.length, offset, optionsize);
1579                         got_mss_option = 1;
1580                         if (all_options->as_mss.length != 4) {
1581                                 return 1;
1582                         } else {
1583                                 tmp = ntohs(all_options->as_mss.mss);
1584                                 if (tmp > 0 && tmp <
1585                                     cm_node->tcp_cntxt.mss)
1586                                         cm_node->tcp_cntxt.mss = tmp;
1587                         }
1588                         break;
1589                 case OPTION_NUMBER_WINDOW_SCALE:
1590                         cm_node->tcp_cntxt.snd_wscale =
1591                                 all_options->as_windowscale.shiftcount;
1592                         break;
1593                 default:
1594                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1595                                   all_options->as_base.optionnum);
1596                         break;
1597                 }
1598                 offset += all_options->as_base.length;
1599         }
1600         if ((!got_mss_option) && (syn_packet))
1601                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1602         return 0;
1603 }
1604
1605 static void drop_packet(struct sk_buff *skb)
1606 {
1607         atomic_inc(&cm_accel_dropped_pkts);
1608         dev_kfree_skb_any(skb);
1609 }
1610
1611 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1612 {
1613         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1614                   "refcnt=%d\n", cm_node, cm_node->state,
1615                   atomic_read(&cm_node->ref_count));
1616         switch (cm_node->state) {
1617         case NES_CM_STATE_SYN_RCVD:
1618         case NES_CM_STATE_SYN_SENT:
1619         case NES_CM_STATE_ESTABLISHED:
1620         case NES_CM_STATE_MPAREJ_RCVD:
1621                 cm_node->tcp_cntxt.rcv_nxt++;
1622                 cleanup_retrans_entry(cm_node);
1623                 cm_node->state = NES_CM_STATE_LAST_ACK;
1624                 send_fin(cm_node, NULL);
1625                 break;
1626         case NES_CM_STATE_MPAREQ_SENT:
1627                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1628                 cm_node->tcp_cntxt.rcv_nxt++;
1629                 cleanup_retrans_entry(cm_node);
1630                 cm_node->state = NES_CM_STATE_CLOSED;
1631                 add_ref_cm_node(cm_node);
1632                 send_reset(cm_node, NULL);
1633                 break;
1634         case NES_CM_STATE_FIN_WAIT1:
1635                 cm_node->tcp_cntxt.rcv_nxt++;
1636                 cleanup_retrans_entry(cm_node);
1637                 cm_node->state = NES_CM_STATE_CLOSING;
1638                 send_ack(cm_node, NULL);
1639                 /* Wait for ACK as this is simultaneous close..
1640                 * After we receive ACK, do not send anything..
1641                 * Just rm the node.. Done.. */
1642                 break;
1643         case NES_CM_STATE_FIN_WAIT2:
1644                 cm_node->tcp_cntxt.rcv_nxt++;
1645                 cleanup_retrans_entry(cm_node);
1646                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1647                 send_ack(cm_node, NULL);
1648                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1649                 break;
1650         case NES_CM_STATE_TIME_WAIT:
1651                 cm_node->tcp_cntxt.rcv_nxt++;
1652                 cleanup_retrans_entry(cm_node);
1653                 cm_node->state = NES_CM_STATE_CLOSED;
1654                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1655                 break;
1656         case NES_CM_STATE_TSA:
1657         default:
1658                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1659                         cm_node, cm_node->state);
1660                 break;
1661         }
1662 }
1663
1664
1665 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1666         struct tcphdr *tcph)
1667 {
1668
1669         int     reset = 0;      /* whether to send reset in case of err.. */
1670         atomic_inc(&cm_resets_recvd);
1671         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1672                         " refcnt=%d\n", cm_node, cm_node->state,
1673                         atomic_read(&cm_node->ref_count));
1674         cleanup_retrans_entry(cm_node);
1675         switch (cm_node->state) {
1676         case NES_CM_STATE_SYN_SENT:
1677         case NES_CM_STATE_MPAREQ_SENT:
1678                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1679                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1680                         cm_node->listener, cm_node->state);
1681                 switch (cm_node->mpa_frame_rev) {
1682                 case IETF_MPA_V2:
1683                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1684                         /* send a syn and goto syn sent state */
1685                         cm_node->state = NES_CM_STATE_SYN_SENT;
1686                         if (send_syn(cm_node, 0, NULL)) {
1687                                 active_open_err(cm_node, skb, reset);
1688                         }
1689                         break;
1690                 case IETF_MPA_V1:
1691                 default:
1692                         active_open_err(cm_node, skb, reset);
1693                         break;
1694                 }
1695                 break;
1696         case NES_CM_STATE_MPAREQ_RCVD:
1697                 atomic_inc(&cm_node->passive_state);
1698                 dev_kfree_skb_any(skb);
1699                 break;
1700         case NES_CM_STATE_ESTABLISHED:
1701         case NES_CM_STATE_SYN_RCVD:
1702         case NES_CM_STATE_LISTENING:
1703                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1704                 passive_open_err(cm_node, skb, reset);
1705                 break;
1706         case NES_CM_STATE_TSA:
1707                 active_open_err(cm_node, skb, reset);
1708                 break;
1709         case NES_CM_STATE_CLOSED:
1710                 drop_packet(skb);
1711                 break;
1712         case NES_CM_STATE_FIN_WAIT2:
1713         case NES_CM_STATE_FIN_WAIT1:
1714         case NES_CM_STATE_LAST_ACK:
1715                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1716         case NES_CM_STATE_TIME_WAIT:
1717                 cm_node->state = NES_CM_STATE_CLOSED;
1718                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1719                 drop_packet(skb);
1720                 break;
1721         default:
1722                 drop_packet(skb);
1723                 break;
1724         }
1725 }
1726
1727
1728 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1729 {
1730         int ret = 0;
1731         int datasize = skb->len;
1732         u8 *dataloc = skb->data;
1733
1734         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1735         u32 res_type;
1736
1737         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1738         if (ret) {
1739                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1740                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1741                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1742                                   "cm_node=%p listener=%p state=%d\n", __func__,
1743                                   __LINE__, cm_node, cm_node->listener,
1744                                   cm_node->state);
1745                         active_open_err(cm_node, skb, 1);
1746                 } else {
1747                         passive_open_err(cm_node, skb, 1);
1748                 }
1749                 return;
1750         }
1751
1752         switch (cm_node->state) {
1753         case NES_CM_STATE_ESTABLISHED:
1754                 if (res_type == NES_MPA_REQUEST_REJECT)
1755                         /*BIG problem as we are receiving the MPA.. So should
1756                          * not be REJECT.. This is Passive Open.. We can
1757                          * only receive it Reject for Active Open...*/
1758                         WARN_ON(1);
1759                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1760                 type = NES_CM_EVENT_MPA_REQ;
1761                 atomic_set(&cm_node->passive_state,
1762                            NES_PASSIVE_STATE_INDICATED);
1763                 break;
1764         case NES_CM_STATE_MPAREQ_SENT:
1765                 cleanup_retrans_entry(cm_node);
1766                 if (res_type == NES_MPA_REQUEST_REJECT) {
1767                         type = NES_CM_EVENT_MPA_REJECT;
1768                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1769                 } else {
1770                         type = NES_CM_EVENT_CONNECTED;
1771                         cm_node->state = NES_CM_STATE_TSA;
1772                 }
1773
1774                 break;
1775         default:
1776                 WARN_ON(1);
1777                 break;
1778         }
1779         dev_kfree_skb_any(skb);
1780         create_event(cm_node, type);
1781 }
1782
1783 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1784 {
1785         switch (cm_node->state) {
1786         case NES_CM_STATE_SYN_SENT:
1787         case NES_CM_STATE_MPAREQ_SENT:
1788                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1789                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1790                           cm_node->listener, cm_node->state);
1791                 active_open_err(cm_node, skb, 1);
1792                 break;
1793         case NES_CM_STATE_ESTABLISHED:
1794         case NES_CM_STATE_SYN_RCVD:
1795                 passive_open_err(cm_node, skb, 1);
1796                 break;
1797         case NES_CM_STATE_TSA:
1798         default:
1799                 drop_packet(skb);
1800         }
1801 }
1802
1803 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1804                      struct sk_buff *skb)
1805 {
1806         int err;
1807
1808         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1809         if (err)
1810                 active_open_err(cm_node, skb, 1);
1811
1812         return err;
1813 }
1814
1815 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1816                      struct sk_buff *skb)
1817 {
1818         int err = 0;
1819         u32 seq;
1820         u32 ack_seq;
1821         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1822         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1823         u32 rcv_wnd;
1824
1825         seq = ntohl(tcph->seq);
1826         ack_seq = ntohl(tcph->ack_seq);
1827         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1828         if (ack_seq != loc_seq_num)
1829                 err = 1;
1830         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1831                 err = 1;
1832         if (err) {
1833                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1834                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1835                           cm_node->listener, cm_node->state);
1836                 indicate_pkt_err(cm_node, skb);
1837                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1838                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1839                           rcv_wnd);
1840         }
1841         return err;
1842 }
1843
1844 /*
1845  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1846  * is created with a listener or it may comein as rexmitted packet which in
1847  * that case will be just dropped.
1848  */
1849 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1850                            struct tcphdr *tcph)
1851 {
1852         int ret;
1853         u32 inc_sequence;
1854         int optionsize;
1855
1856         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1857         skb_trim(skb, 0);
1858         inc_sequence = ntohl(tcph->seq);
1859
1860         switch (cm_node->state) {
1861         case NES_CM_STATE_SYN_SENT:
1862         case NES_CM_STATE_MPAREQ_SENT:
1863                 /* Rcvd syn on active open connection*/
1864                 active_open_err(cm_node, skb, 1);
1865                 break;
1866         case NES_CM_STATE_LISTENING:
1867                 /* Passive OPEN */
1868                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1869                     cm_node->listener->backlog) {
1870                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1871                                   "pressure \n");
1872                         cm_backlog_drops++;
1873                         passive_open_err(cm_node, skb, 0);
1874                         break;
1875                 }
1876                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1877                                          1);
1878                 if (ret) {
1879                         passive_open_err(cm_node, skb, 0);
1880                         /* drop pkt */
1881                         break;
1882                 }
1883                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1884                 BUG_ON(cm_node->send_entry);
1885                 cm_node->accept_pend = 1;
1886                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1887
1888                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1889                 send_syn(cm_node, 1, skb);
1890                 break;
1891         case NES_CM_STATE_CLOSED:
1892                 cleanup_retrans_entry(cm_node);
1893                 add_ref_cm_node(cm_node);
1894                 send_reset(cm_node, skb);
1895                 break;
1896         case NES_CM_STATE_TSA:
1897         case NES_CM_STATE_ESTABLISHED:
1898         case NES_CM_STATE_FIN_WAIT1:
1899         case NES_CM_STATE_FIN_WAIT2:
1900         case NES_CM_STATE_MPAREQ_RCVD:
1901         case NES_CM_STATE_LAST_ACK:
1902         case NES_CM_STATE_CLOSING:
1903         case NES_CM_STATE_UNKNOWN:
1904         default:
1905                 drop_packet(skb);
1906                 break;
1907         }
1908 }
1909
1910 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1911                               struct tcphdr *tcph)
1912 {
1913         int ret;
1914         u32 inc_sequence;
1915         int optionsize;
1916
1917         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1918         skb_trim(skb, 0);
1919         inc_sequence = ntohl(tcph->seq);
1920         switch (cm_node->state) {
1921         case NES_CM_STATE_SYN_SENT:
1922                 cleanup_retrans_entry(cm_node);
1923                 /* active open */
1924                 if (check_syn(cm_node, tcph, skb))
1925                         return;
1926                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1927                 /* setup options */
1928                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1929                 if (ret) {
1930                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1931                                   cm_node);
1932                         break;
1933                 }
1934                 cleanup_retrans_entry(cm_node);
1935                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1936                 send_mpa_request(cm_node, skb);
1937                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1938                 break;
1939         case NES_CM_STATE_MPAREQ_RCVD:
1940                 /* passive open, so should not be here */
1941                 passive_open_err(cm_node, skb, 1);
1942                 break;
1943         case NES_CM_STATE_LISTENING:
1944                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1945                 cleanup_retrans_entry(cm_node);
1946                 cm_node->state = NES_CM_STATE_CLOSED;
1947                 send_reset(cm_node, skb);
1948                 break;
1949         case NES_CM_STATE_CLOSED:
1950                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1951                 cleanup_retrans_entry(cm_node);
1952                 add_ref_cm_node(cm_node);
1953                 send_reset(cm_node, skb);
1954                 break;
1955         case NES_CM_STATE_ESTABLISHED:
1956         case NES_CM_STATE_FIN_WAIT1:
1957         case NES_CM_STATE_FIN_WAIT2:
1958         case NES_CM_STATE_LAST_ACK:
1959         case NES_CM_STATE_TSA:
1960         case NES_CM_STATE_CLOSING:
1961         case NES_CM_STATE_UNKNOWN:
1962         case NES_CM_STATE_MPAREQ_SENT:
1963         default:
1964                 drop_packet(skb);
1965                 break;
1966         }
1967 }
1968
1969 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1970                           struct tcphdr *tcph)
1971 {
1972         int datasize = 0;
1973         u32 inc_sequence;
1974         int ret = 0;
1975         int optionsize;
1976
1977         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1978
1979         if (check_seq(cm_node, tcph, skb))
1980                 return -EINVAL;
1981
1982         skb_pull(skb, tcph->doff << 2);
1983         inc_sequence = ntohl(tcph->seq);
1984         datasize = skb->len;
1985         switch (cm_node->state) {
1986         case NES_CM_STATE_SYN_RCVD:
1987                 /* Passive OPEN */
1988                 cleanup_retrans_entry(cm_node);
1989                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1990                 if (ret)
1991                         break;
1992                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1993                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1994                 if (datasize) {
1995                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1996                         handle_rcv_mpa(cm_node, skb);
1997                 } else { /* rcvd ACK only */
1998                         dev_kfree_skb_any(skb);
1999                 }
2000                 break;
2001         case NES_CM_STATE_ESTABLISHED:
2002                 /* Passive OPEN */
2003                 cleanup_retrans_entry(cm_node);
2004                 if (datasize) {
2005                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2006                         handle_rcv_mpa(cm_node, skb);
2007                 } else {
2008                         drop_packet(skb);
2009                 }
2010                 break;
2011         case NES_CM_STATE_MPAREQ_SENT:
2012                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2013                 if (datasize) {
2014                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2015                         handle_rcv_mpa(cm_node, skb);
2016                 } else { /* Could be just an ack pkt.. */
2017                         dev_kfree_skb_any(skb);
2018                 }
2019                 break;
2020         case NES_CM_STATE_LISTENING:
2021                 cleanup_retrans_entry(cm_node);
2022                 cm_node->state = NES_CM_STATE_CLOSED;
2023                 send_reset(cm_node, skb);
2024                 break;
2025         case NES_CM_STATE_CLOSED:
2026                 cleanup_retrans_entry(cm_node);
2027                 add_ref_cm_node(cm_node);
2028                 send_reset(cm_node, skb);
2029                 break;
2030         case NES_CM_STATE_LAST_ACK:
2031         case NES_CM_STATE_CLOSING:
2032                 cleanup_retrans_entry(cm_node);
2033                 cm_node->state = NES_CM_STATE_CLOSED;
2034                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2035                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2036                 drop_packet(skb);
2037                 break;
2038         case NES_CM_STATE_FIN_WAIT1:
2039                 cleanup_retrans_entry(cm_node);
2040                 drop_packet(skb);
2041                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2042                 break;
2043         case NES_CM_STATE_SYN_SENT:
2044         case NES_CM_STATE_FIN_WAIT2:
2045         case NES_CM_STATE_TSA:
2046         case NES_CM_STATE_MPAREQ_RCVD:
2047         case NES_CM_STATE_UNKNOWN:
2048         default:
2049                 cleanup_retrans_entry(cm_node);
2050                 drop_packet(skb);
2051                 break;
2052         }
2053         return ret;
2054 }
2055
2056
2057
2058 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2059                               struct sk_buff *skb, int optionsize, int passive)
2060 {
2061         u8 *optionsloc = (u8 *)&tcph[1];
2062
2063         if (optionsize) {
2064                 if (process_options(cm_node, optionsloc, optionsize,
2065                                     (u32)tcph->syn)) {
2066                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2067                                   __func__, cm_node);
2068                         if (passive)
2069                                 passive_open_err(cm_node, skb, 1);
2070                         else
2071                                 active_open_err(cm_node, skb, 1);
2072                         return 1;
2073                 }
2074         }
2075
2076         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2077                                      cm_node->tcp_cntxt.snd_wscale;
2078
2079         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2080                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2081         return 0;
2082 }
2083
2084 /*
2085  * active_open_err() will send reset() if flag set..
2086  * It will also send ABORT event.
2087  */
2088 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2089                             int reset)
2090 {
2091         cleanup_retrans_entry(cm_node);
2092         if (reset) {
2093                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2094                           "state=%d\n", cm_node, cm_node->state);
2095                 add_ref_cm_node(cm_node);
2096                 send_reset(cm_node, skb);
2097         } else {
2098                 dev_kfree_skb_any(skb);
2099         }
2100
2101         cm_node->state = NES_CM_STATE_CLOSED;
2102         create_event(cm_node, NES_CM_EVENT_ABORTED);
2103 }
2104
2105 /*
2106  * passive_open_err() will either do a reset() or will free up the skb and
2107  * remove the cm_node.
2108  */
2109 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2110                              int reset)
2111 {
2112         cleanup_retrans_entry(cm_node);
2113         cm_node->state = NES_CM_STATE_CLOSED;
2114         if (reset) {
2115                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2116                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2117                 send_reset(cm_node, skb);
2118         } else {
2119                 dev_kfree_skb_any(skb);
2120                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2121         }
2122 }
2123
2124 /*
2125  * free_retrans_entry() routines assumes that the retrans_list_lock has
2126  * been acquired before calling.
2127  */
2128 static void free_retrans_entry(struct nes_cm_node *cm_node)
2129 {
2130         struct nes_timer_entry *send_entry;
2131
2132         send_entry = cm_node->send_entry;
2133         if (send_entry) {
2134                 cm_node->send_entry = NULL;
2135                 dev_kfree_skb_any(send_entry->skb);
2136                 kfree(send_entry);
2137                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2138         }
2139 }
2140
2141 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2142 {
2143         unsigned long flags;
2144
2145         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2146         free_retrans_entry(cm_node);
2147         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2148 }
2149
2150 /**
2151  * process_packet
2152  * Returns skb if to be freed, else it will return NULL if already used..
2153  */
2154 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2155                            struct nes_cm_core *cm_core)
2156 {
2157         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2158         struct tcphdr *tcph = tcp_hdr(skb);
2159         u32 fin_set = 0;
2160         int ret = 0;
2161
2162         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2163
2164         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2165                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2166                   tcph->ack, tcph->rst, tcph->fin);
2167
2168         if (tcph->rst) {
2169                 pkt_type = NES_PKT_TYPE_RST;
2170         } else if (tcph->syn) {
2171                 pkt_type = NES_PKT_TYPE_SYN;
2172                 if (tcph->ack)
2173                         pkt_type = NES_PKT_TYPE_SYNACK;
2174         } else if (tcph->ack) {
2175                 pkt_type = NES_PKT_TYPE_ACK;
2176         }
2177         if (tcph->fin)
2178                 fin_set = 1;
2179
2180         switch (pkt_type) {
2181         case NES_PKT_TYPE_SYN:
2182                 handle_syn_pkt(cm_node, skb, tcph);
2183                 break;
2184         case NES_PKT_TYPE_SYNACK:
2185                 handle_synack_pkt(cm_node, skb, tcph);
2186                 break;
2187         case NES_PKT_TYPE_ACK:
2188                 ret = handle_ack_pkt(cm_node, skb, tcph);
2189                 if (fin_set && !ret)
2190                         handle_fin_pkt(cm_node);
2191                 break;
2192         case NES_PKT_TYPE_RST:
2193                 handle_rst_pkt(cm_node, skb, tcph);
2194                 break;
2195         default:
2196                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2197                         handle_fin_pkt(cm_node);
2198                 drop_packet(skb);
2199                 break;
2200         }
2201 }
2202
2203 /**
2204  * mini_cm_listen - create a listen node with params
2205  */
2206 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2207                                               struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2208 {
2209         struct nes_cm_listener *listener;
2210         unsigned long flags;
2211
2212         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2213                   cm_info->loc_addr, cm_info->loc_port);
2214
2215         /* cannot have multiple matching listeners */
2216         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2217                                  htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2218         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2219                 /* find automatically incs ref count ??? */
2220                 atomic_dec(&listener->ref_count);
2221                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2222                 return NULL;
2223         }
2224
2225         if (!listener) {
2226                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2227                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2228                 if (!listener) {
2229                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2230                         return NULL;
2231                 }
2232
2233                 listener->loc_addr = htonl(cm_info->loc_addr);
2234                 listener->loc_port = htons(cm_info->loc_port);
2235                 listener->reused_node = 0;
2236
2237                 atomic_set(&listener->ref_count, 1);
2238         }
2239         /* pasive case */
2240         /* find already inc'ed the ref count */
2241         else {
2242                 listener->reused_node = 1;
2243         }
2244
2245         listener->cm_id = cm_info->cm_id;
2246         atomic_set(&listener->pend_accepts_cnt, 0);
2247         listener->cm_core = cm_core;
2248         listener->nesvnic = nesvnic;
2249         atomic_inc(&cm_core->node_cnt);
2250
2251         listener->conn_type = cm_info->conn_type;
2252         listener->backlog = cm_info->backlog;
2253         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2254
2255         if (!listener->reused_node) {
2256                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2257                 list_add(&listener->list, &cm_core->listen_list.list);
2258                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2259                 atomic_inc(&cm_core->listen_node_cnt);
2260         }
2261
2262         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2263                   " listener = %p, backlog = %d, cm_id = %p.\n",
2264                   cm_info->loc_addr, cm_info->loc_port,
2265                   listener, listener->backlog, listener->cm_id);
2266
2267         return listener;
2268 }
2269
2270
2271 /**
2272  * mini_cm_connect - make a connection node with params
2273  */
2274 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2275                                            struct nes_vnic *nesvnic, u16 private_data_len,
2276                                            void *private_data, struct nes_cm_info *cm_info)
2277 {
2278         int ret = 0;
2279         struct nes_cm_node *cm_node;
2280         struct nes_cm_listener *loopbackremotelistener;
2281         struct nes_cm_node *loopbackremotenode;
2282         struct nes_cm_info loopback_cm_info;
2283         u8 *start_buff;
2284
2285         /* create a CM connection node */
2286         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2287         if (!cm_node)
2288                 return NULL;
2289
2290         /* set our node side to client (active) side */
2291         cm_node->tcp_cntxt.client = 1;
2292         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2293
2294         if (cm_info->loc_addr == cm_info->rem_addr) {
2295                 loopbackremotelistener = find_listener(cm_core,
2296                                                        ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2297                                                        NES_CM_LISTENER_ACTIVE_STATE);
2298                 if (loopbackremotelistener == NULL) {
2299                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2300                 } else {
2301                         loopback_cm_info = *cm_info;
2302                         loopback_cm_info.loc_port = cm_info->rem_port;
2303                         loopback_cm_info.rem_port = cm_info->loc_port;
2304                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2305                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2306                                                           &loopback_cm_info, loopbackremotelistener);
2307                         if (!loopbackremotenode) {
2308                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2309                                 return NULL;
2310                         }
2311                         atomic_inc(&cm_loopbacks);
2312                         loopbackremotenode->loopbackpartner = cm_node;
2313                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2314                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2315                         cm_node->loopbackpartner = loopbackremotenode;
2316                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2317                                private_data_len);
2318                         loopbackremotenode->mpa_frame_size = private_data_len;
2319
2320                         /* we are done handling this state. */
2321                         /* set node to a TSA state */
2322                         cm_node->state = NES_CM_STATE_TSA;
2323                         cm_node->tcp_cntxt.rcv_nxt =
2324                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2325                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2326                                 cm_node->tcp_cntxt.loc_seq_num;
2327                         cm_node->tcp_cntxt.max_snd_wnd =
2328                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2329                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2330                                 cm_node->tcp_cntxt.rcv_wnd;
2331                         cm_node->tcp_cntxt.snd_wnd =
2332                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2333                         loopbackremotenode->tcp_cntxt.snd_wnd =
2334                                 cm_node->tcp_cntxt.rcv_wnd;
2335                         cm_node->tcp_cntxt.snd_wscale =
2336                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2337                         loopbackremotenode->tcp_cntxt.snd_wscale =
2338                                 cm_node->tcp_cntxt.rcv_wscale;
2339                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2340                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2341                 }
2342                 return cm_node;
2343         }
2344
2345         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2346         cm_node->mpa_frame_size = private_data_len;
2347
2348         memcpy(start_buff, private_data, private_data_len);
2349
2350         /* send a syn and goto syn sent state */
2351         cm_node->state = NES_CM_STATE_SYN_SENT;
2352         ret = send_syn(cm_node, 0, NULL);
2353
2354         if (ret) {
2355                 /* error in sending the syn free up the cm_node struct */
2356                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2357                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2358                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2359                           cm_node->cm_id);
2360                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2361                 cm_node = NULL;
2362         }
2363
2364         if (cm_node) {
2365                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2366                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2367                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2368                           cm_node->cm_id);
2369         }
2370
2371         return cm_node;
2372 }
2373
2374
2375 /**
2376  * mini_cm_accept - accept a connection
2377  * This function is never called
2378  */
2379 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2380 {
2381         return 0;
2382 }
2383
2384
2385 /**
2386  * mini_cm_reject - reject and teardown a connection
2387  */
2388 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2389 {
2390         int ret = 0;
2391         int err = 0;
2392         int passive_state;
2393         struct nes_cm_event event;
2394         struct iw_cm_id *cm_id = cm_node->cm_id;
2395         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2396
2397         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2398                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2399
2400         if (cm_node->tcp_cntxt.client)
2401                 return ret;
2402         cleanup_retrans_entry(cm_node);
2403
2404         if (!loopback) {
2405                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2406                 if (passive_state == NES_SEND_RESET_EVENT) {
2407                         cm_node->state = NES_CM_STATE_CLOSED;
2408                         rem_ref_cm_node(cm_core, cm_node);
2409                 } else {
2410                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2411                                 rem_ref_cm_node(cm_core, cm_node);
2412                         } else {
2413                                 ret = send_mpa_reject(cm_node);
2414                                 if (ret) {
2415                                         cm_node->state = NES_CM_STATE_CLOSED;
2416                                         err = send_reset(cm_node, NULL);
2417                                         if (err)
2418                                                 WARN_ON(1);
2419                                 } else {
2420                                         cm_id->add_ref(cm_id);
2421                                 }
2422                         }
2423                 }
2424         } else {
2425                 cm_node->cm_id = NULL;
2426                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2427                         rem_ref_cm_node(cm_core, cm_node);
2428                         rem_ref_cm_node(cm_core, loopback);
2429                 } else {
2430                         event.cm_node = loopback;
2431                         event.cm_info.rem_addr = loopback->rem_addr;
2432                         event.cm_info.loc_addr = loopback->loc_addr;
2433                         event.cm_info.rem_port = loopback->rem_port;
2434                         event.cm_info.loc_port = loopback->loc_port;
2435                         event.cm_info.cm_id = loopback->cm_id;
2436                         cm_event_mpa_reject(&event);
2437                         rem_ref_cm_node(cm_core, cm_node);
2438                         loopback->state = NES_CM_STATE_CLOSING;
2439
2440                         cm_id = loopback->cm_id;
2441                         rem_ref_cm_node(cm_core, loopback);
2442                         cm_id->rem_ref(cm_id);
2443                 }
2444         }
2445
2446         return ret;
2447 }
2448
2449
2450 /**
2451  * mini_cm_close
2452  */
2453 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2454 {
2455         int ret = 0;
2456
2457         if (!cm_core || !cm_node)
2458                 return -EINVAL;
2459
2460         switch (cm_node->state) {
2461         case NES_CM_STATE_SYN_RCVD:
2462         case NES_CM_STATE_SYN_SENT:
2463         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2464         case NES_CM_STATE_ESTABLISHED:
2465         case NES_CM_STATE_ACCEPTING:
2466         case NES_CM_STATE_MPAREQ_SENT:
2467         case NES_CM_STATE_MPAREQ_RCVD:
2468                 cleanup_retrans_entry(cm_node);
2469                 send_reset(cm_node, NULL);
2470                 break;
2471         case NES_CM_STATE_CLOSE_WAIT:
2472                 cm_node->state = NES_CM_STATE_LAST_ACK;
2473                 send_fin(cm_node, NULL);
2474                 break;
2475         case NES_CM_STATE_FIN_WAIT1:
2476         case NES_CM_STATE_FIN_WAIT2:
2477         case NES_CM_STATE_LAST_ACK:
2478         case NES_CM_STATE_TIME_WAIT:
2479         case NES_CM_STATE_CLOSING:
2480                 ret = -1;
2481                 break;
2482         case NES_CM_STATE_LISTENING:
2483                 cleanup_retrans_entry(cm_node);
2484                 send_reset(cm_node, NULL);
2485                 break;
2486         case NES_CM_STATE_MPAREJ_RCVD:
2487         case NES_CM_STATE_UNKNOWN:
2488         case NES_CM_STATE_INITED:
2489         case NES_CM_STATE_CLOSED:
2490         case NES_CM_STATE_LISTENER_DESTROYED:
2491                 ret = rem_ref_cm_node(cm_core, cm_node);
2492                 break;
2493         case NES_CM_STATE_TSA:
2494                 if (cm_node->send_entry)
2495                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2496                                "send_entry=%p\n", cm_node->send_entry);
2497                 ret = rem_ref_cm_node(cm_core, cm_node);
2498                 break;
2499         }
2500         return ret;
2501 }
2502
2503
2504 /**
2505  * recv_pkt - recv an ETHERNET packet, and process it through CM
2506  * node state machine
2507  */
2508 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2509                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2510 {
2511         struct nes_cm_node *cm_node = NULL;
2512         struct nes_cm_listener *listener = NULL;
2513         struct iphdr *iph;
2514         struct tcphdr *tcph;
2515         struct nes_cm_info nfo;
2516         int skb_handled = 1;
2517         __be32 tmp_daddr, tmp_saddr;
2518
2519         if (!skb)
2520                 return 0;
2521         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2522                 return 0;
2523
2524         iph = (struct iphdr *)skb->data;
2525         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2526
2527         nfo.loc_addr = ntohl(iph->daddr);
2528         nfo.loc_port = ntohs(tcph->dest);
2529         nfo.rem_addr = ntohl(iph->saddr);
2530         nfo.rem_port = ntohs(tcph->source);
2531
2532         tmp_daddr = cpu_to_be32(iph->daddr);
2533         tmp_saddr = cpu_to_be32(iph->saddr);
2534
2535         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2536                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2537
2538         do {
2539                 cm_node = find_node(cm_core,
2540                                     nfo.rem_port, nfo.rem_addr,
2541                                     nfo.loc_port, nfo.loc_addr);
2542
2543                 if (!cm_node) {
2544                         /* Only type of packet accepted are for */
2545                         /* the PASSIVE open (syn only) */
2546                         if ((!tcph->syn) || (tcph->ack)) {
2547                                 skb_handled = 0;
2548                                 break;
2549                         }
2550                         listener = find_listener(cm_core, nfo.loc_addr,
2551                                                  nfo.loc_port,
2552                                                  NES_CM_LISTENER_ACTIVE_STATE);
2553                         if (!listener) {
2554                                 nfo.cm_id = NULL;
2555                                 nfo.conn_type = 0;
2556                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2557                                 skb_handled = 0;
2558                                 break;
2559                         }
2560                         nfo.cm_id = listener->cm_id;
2561                         nfo.conn_type = listener->conn_type;
2562                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2563                                                listener);
2564                         if (!cm_node) {
2565                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2566                                           "node\n");
2567                                 cm_packets_dropped++;
2568                                 atomic_dec(&listener->ref_count);
2569                                 dev_kfree_skb_any(skb);
2570                                 break;
2571                         }
2572                         if (!tcph->rst && !tcph->fin) {
2573                                 cm_node->state = NES_CM_STATE_LISTENING;
2574                         } else {
2575                                 cm_packets_dropped++;
2576                                 rem_ref_cm_node(cm_core, cm_node);
2577                                 dev_kfree_skb_any(skb);
2578                                 break;
2579                         }
2580                         add_ref_cm_node(cm_node);
2581                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2582                         if (cm_node->nesqp->pau_mode)
2583                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2584                         else {
2585                                 rem_ref_cm_node(cm_core, cm_node);
2586                                 atomic_inc(&cm_accel_dropped_pkts);
2587                                 dev_kfree_skb_any(skb);
2588                         }
2589                         break;
2590                 }
2591                 skb_reset_network_header(skb);
2592                 skb_set_transport_header(skb, sizeof(*tcph));
2593                 skb->len = ntohs(iph->tot_len);
2594                 process_packet(cm_node, skb, cm_core);
2595                 rem_ref_cm_node(cm_core, cm_node);
2596         } while (0);
2597         return skb_handled;
2598 }
2599
2600
2601 /**
2602  * nes_cm_alloc_core - allocate a top level instance of a cm core
2603  */
2604 static struct nes_cm_core *nes_cm_alloc_core(void)
2605 {
2606         struct nes_cm_core *cm_core;
2607
2608         /* setup the CM core */
2609         /* alloc top level core control structure */
2610         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2611         if (!cm_core)
2612                 return NULL;
2613
2614         INIT_LIST_HEAD(&cm_core->connected_nodes);
2615         init_timer(&cm_core->tcp_timer);
2616         cm_core->tcp_timer.function = nes_cm_timer_tick;
2617
2618         cm_core->mtu = NES_CM_DEFAULT_MTU;
2619         cm_core->state = NES_CM_STATE_INITED;
2620         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2621
2622         atomic_set(&cm_core->events_posted, 0);
2623
2624         cm_core->api = &nes_cm_api;
2625
2626         spin_lock_init(&cm_core->ht_lock);
2627         spin_lock_init(&cm_core->listen_list_lock);
2628
2629         INIT_LIST_HEAD(&cm_core->listen_list.list);
2630
2631         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2632
2633         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2634         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2635         cm_core->post_event = nes_cm_post_event;
2636         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2637         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2638
2639         print_core(cm_core);
2640         return cm_core;
2641 }
2642
2643
2644 /**
2645  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2646  */
2647 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2648 {
2649         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2650
2651         if (!cm_core)
2652                 return -EINVAL;
2653
2654         barrier();
2655
2656         if (timer_pending(&cm_core->tcp_timer))
2657                 del_timer(&cm_core->tcp_timer);
2658
2659         destroy_workqueue(cm_core->event_wq);
2660         destroy_workqueue(cm_core->disconn_wq);
2661         nes_debug(NES_DBG_CM, "\n");
2662         kfree(cm_core);
2663
2664         return 0;
2665 }
2666
2667
2668 /**
2669  * mini_cm_get
2670  */
2671 static int mini_cm_get(struct nes_cm_core *cm_core)
2672 {
2673         return cm_core->state;
2674 }
2675
2676
2677 /**
2678  * mini_cm_set
2679  */
2680 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2681 {
2682         int ret = 0;
2683
2684         switch (type) {
2685         case NES_CM_SET_PKT_SIZE:
2686                 cm_core->mtu = value;
2687                 break;
2688         case NES_CM_SET_FREE_PKT_Q_SIZE:
2689                 cm_core->free_tx_pkt_max = value;
2690                 break;
2691         default:
2692                 /* unknown set option */
2693                 ret = -EINVAL;
2694         }
2695
2696         return ret;
2697 }
2698
2699
2700 /**
2701  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2702  * successfully exchanged when this is called
2703  */
2704 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2705 {
2706         int ret = 0;
2707
2708         if (!nesqp)
2709                 return -EINVAL;
2710
2711         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2712                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2713                                                   NES_QPCONTEXT_MISC_DROS);
2714
2715         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2716                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2717
2718         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2719
2720         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2721
2722         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2723                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2724
2725         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2726                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2727                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2728
2729         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2730                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2731                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2732
2733         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2734         nesqp->nesqp_context->ts_recent = 0;
2735         nesqp->nesqp_context->ts_age = 0;
2736         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2737         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2738         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2739         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2740                                                     cm_node->tcp_cntxt.rcv_wscale);
2741         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2742         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2743         nesqp->nesqp_context->srtt = 0;
2744         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2745         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2746         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2747         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2748         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2749         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2750
2751         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2752                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2753                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2754                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2755                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2756                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2757                   le32_to_cpu(nesqp->nesqp_context->misc));
2758         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2759         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2760         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2761
2762         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2763         cm_node->state = NES_CM_STATE_TSA;
2764
2765         return ret;
2766 }
2767
2768
2769 /**
2770  * nes_cm_disconn
2771  */
2772 int nes_cm_disconn(struct nes_qp *nesqp)
2773 {
2774         struct disconn_work *work;
2775
2776         work = kzalloc(sizeof *work, GFP_ATOMIC);
2777         if (!work)
2778                 return -ENOMEM;  /* Timer will clean up */
2779
2780         nes_add_ref(&nesqp->ibqp);
2781         work->nesqp = nesqp;
2782         INIT_WORK(&work->work, nes_disconnect_worker);
2783         queue_work(g_cm_core->disconn_wq, &work->work);
2784         return 0;
2785 }
2786
2787
2788 /**
2789  * nes_disconnect_worker
2790  */
2791 static void nes_disconnect_worker(struct work_struct *work)
2792 {
2793         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2794         struct nes_qp *nesqp = dwork->nesqp;
2795
2796         kfree(dwork);
2797         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2798                   nesqp->last_aeq, nesqp->hwqp.qp_id);
2799         nes_cm_disconn_true(nesqp);
2800         nes_rem_ref(&nesqp->ibqp);
2801 }
2802
2803
2804 /**
2805  * nes_cm_disconn_true
2806  */
2807 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2808 {
2809         unsigned long flags;
2810         int ret = 0;
2811         struct iw_cm_id *cm_id;
2812         struct iw_cm_event cm_event;
2813         struct nes_vnic *nesvnic;
2814         u16 last_ae;
2815         u8 original_hw_tcp_state;
2816         u8 original_ibqp_state;
2817         int disconn_status = 0;
2818         int issue_disconn = 0;
2819         int issue_close = 0;
2820         int issue_flush = 0;
2821         u32 flush_q = NES_CQP_FLUSH_RQ;
2822         struct ib_event ibevent;
2823
2824         if (!nesqp) {
2825                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2826                 return -1;
2827         }
2828
2829         spin_lock_irqsave(&nesqp->lock, flags);
2830         cm_id = nesqp->cm_id;
2831         /* make sure we havent already closed this connection */
2832         if (!cm_id) {
2833                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2834                           nesqp->hwqp.qp_id);
2835                 spin_unlock_irqrestore(&nesqp->lock, flags);
2836                 return -1;
2837         }
2838
2839         nesvnic = to_nesvnic(nesqp->ibqp.device);
2840         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2841
2842         original_hw_tcp_state = nesqp->hw_tcp_state;
2843         original_ibqp_state = nesqp->ibqp_state;
2844         last_ae = nesqp->last_aeq;
2845
2846         if (nesqp->term_flags) {
2847                 issue_disconn = 1;
2848                 issue_close = 1;
2849                 nesqp->cm_id = NULL;
2850                 del_timer(&nesqp->terminate_timer);
2851                 if (nesqp->flush_issued == 0) {
2852                         nesqp->flush_issued = 1;
2853                         issue_flush = 1;
2854                 }
2855         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2856                         ((original_ibqp_state == IB_QPS_RTS) &&
2857                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2858                 issue_disconn = 1;
2859                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2860                         disconn_status = -ECONNRESET;
2861         }
2862
2863         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2864                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2865                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2866                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2867                 issue_close = 1;
2868                 nesqp->cm_id = NULL;
2869                 if (nesqp->flush_issued == 0) {
2870                         nesqp->flush_issued = 1;
2871                         issue_flush = 1;
2872                 }
2873         }
2874
2875         spin_unlock_irqrestore(&nesqp->lock, flags);
2876
2877         if ((issue_flush) && (nesqp->destroyed == 0)) {
2878                 /* Flush the queue(s) */
2879                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2880                         flush_q |= NES_CQP_FLUSH_SQ;
2881                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2882
2883                 if (nesqp->term_flags) {
2884                         ibevent.device = nesqp->ibqp.device;
2885                         ibevent.event = nesqp->terminate_eventtype;
2886                         ibevent.element.qp = &nesqp->ibqp;
2887                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2888                 }
2889         }
2890
2891         if ((cm_id) && (cm_id->event_handler)) {
2892                 if (issue_disconn) {
2893                         atomic_inc(&cm_disconnects);
2894                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2895                         cm_event.status = disconn_status;
2896                         cm_event.local_addr = cm_id->local_addr;
2897                         cm_event.remote_addr = cm_id->remote_addr;
2898                         cm_event.private_data = NULL;
2899                         cm_event.private_data_len = 0;
2900
2901                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2902                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2903                                   "cm_id = %p, refcount = %u.\n",
2904                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2905                                   nesqp->hwqp.sq_tail, cm_id,
2906                                   atomic_read(&nesqp->refcount));
2907
2908                         ret = cm_id->event_handler(cm_id, &cm_event);
2909                         if (ret)
2910                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2911                                           "returned, ret=%d\n", ret);
2912                 }
2913
2914                 if (issue_close) {
2915                         atomic_inc(&cm_closes);
2916                         nes_disconnect(nesqp, 1);
2917
2918                         cm_id->provider_data = nesqp;
2919                         /* Send up the close complete event */
2920                         cm_event.event = IW_CM_EVENT_CLOSE;
2921                         cm_event.status = 0;
2922                         cm_event.provider_data = cm_id->provider_data;
2923                         cm_event.local_addr = cm_id->local_addr;
2924                         cm_event.remote_addr = cm_id->remote_addr;
2925                         cm_event.private_data = NULL;
2926                         cm_event.private_data_len = 0;
2927
2928                         ret = cm_id->event_handler(cm_id, &cm_event);
2929                         if (ret)
2930                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2931
2932                         cm_id->rem_ref(cm_id);
2933                 }
2934         }
2935
2936         return 0;
2937 }
2938
2939
2940 /**
2941  * nes_disconnect
2942  */
2943 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2944 {
2945         int ret = 0;
2946         struct nes_vnic *nesvnic;
2947         struct nes_device *nesdev;
2948         struct nes_ib_device *nesibdev;
2949
2950         nesvnic = to_nesvnic(nesqp->ibqp.device);
2951         if (!nesvnic)
2952                 return -EINVAL;
2953
2954         nesdev = nesvnic->nesdev;
2955         nesibdev = nesvnic->nesibdev;
2956
2957         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2958                         netdev_refcnt_read(nesvnic->netdev));
2959
2960         if (nesqp->active_conn) {
2961
2962                 /* indicate this connection is NOT active */
2963                 nesqp->active_conn = 0;
2964         } else {
2965                 /* Need to free the Last Streaming Mode Message */
2966                 if (nesqp->ietf_frame) {
2967                         if (nesqp->lsmm_mr)
2968                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2969                         pci_free_consistent(nesdev->pcidev,
2970                                             nesqp->private_data_len + nesqp->ietf_frame_size,
2971                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2972                 }
2973         }
2974
2975         /* close the CM node down if it is still active */
2976         if (nesqp->cm_node) {
2977                 nes_debug(NES_DBG_CM, "Call close API\n");
2978
2979                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2980         }
2981
2982         return ret;
2983 }
2984
2985
2986 /**
2987  * nes_accept
2988  */
2989 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2990 {
2991         u64 u64temp;
2992         struct ib_qp *ibqp;
2993         struct nes_qp *nesqp;
2994         struct nes_vnic *nesvnic;
2995         struct nes_device *nesdev;
2996         struct nes_cm_node *cm_node;
2997         struct nes_adapter *adapter;
2998         struct ib_qp_attr attr;
2999         struct iw_cm_event cm_event;
3000         struct nes_hw_qp_wqe *wqe;
3001         struct nes_v4_quad nes_quad;
3002         u32 crc_value;
3003         int ret;
3004         int passive_state;
3005         struct nes_ib_device *nesibdev;
3006         struct ib_mr *ibmr = NULL;
3007         struct ib_phys_buf ibphysbuf;
3008         struct nes_pd *nespd;
3009         u64 tagged_offset;
3010         u8 mpa_frame_offset = 0;
3011         struct ietf_mpa_v2 *mpa_v2_frame;
3012         u8 start_addr = 0;
3013         u8 *start_ptr = &start_addr;
3014         u8 **start_buff = &start_ptr;
3015         u16 buff_len = 0;
3016
3017         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3018         if (!ibqp)
3019                 return -EINVAL;
3020
3021         /* get all our handles */
3022         nesqp = to_nesqp(ibqp);
3023         nesvnic = to_nesvnic(nesqp->ibqp.device);
3024         nesdev = nesvnic->nesdev;
3025         adapter = nesdev->nesadapter;
3026
3027         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3028         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3029                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3030                 nesvnic->netdev->name);
3031
3032         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3033                 if (cm_node->loopbackpartner)
3034                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3035                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3036                 return -EINVAL;
3037         }
3038
3039         passive_state = atomic_add_return(1, &cm_node->passive_state);
3040         if (passive_state == NES_SEND_RESET_EVENT) {
3041                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3042                 return -ECONNRESET;
3043         }
3044
3045         /* associate the node with the QP */
3046         nesqp->cm_node = (void *)cm_node;
3047         cm_node->nesqp = nesqp;
3048
3049         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3050                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3051         atomic_inc(&cm_accepts);
3052
3053         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3054                         netdev_refcnt_read(nesvnic->netdev));
3055
3056         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3057         /* allocate the ietf frame and space for private data */
3058         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3059                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3060                                                  &nesqp->ietf_frame_pbase);
3061
3062         if (!nesqp->ietf_frame) {
3063                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3064                 return -ENOMEM;
3065         }
3066         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3067
3068         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3069                 mpa_frame_offset = 4;
3070
3071         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3072                conn_param->private_data_len);
3073
3074         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3075         nesqp->private_data_len = conn_param->private_data_len;
3076
3077         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3078         wqe = &nesqp->hwqp.sq_vbase[0];
3079
3080         if (cm_id->remote_addr.sin_addr.s_addr !=
3081             cm_id->local_addr.sin_addr.s_addr) {
3082                 u64temp = (unsigned long)nesqp;
3083                 nesibdev = nesvnic->nesibdev;
3084                 nespd = nesqp->nespd;
3085                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3086                 ibphysbuf.size = buff_len;
3087                 tagged_offset = (u64)(unsigned long)*start_buff;
3088                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3089                                                    &ibphysbuf, 1,
3090                                                    IB_ACCESS_LOCAL_WRITE,
3091                                                    &tagged_offset);
3092                 if (!ibmr) {
3093                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3094                                   "for lSMM for cm_node = %p \n",
3095                                   cm_node);
3096                         pci_free_consistent(nesdev->pcidev,
3097                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3098                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3099                         return -ENOMEM;
3100                 }
3101
3102                 ibmr->pd = &nespd->ibpd;
3103                 ibmr->device = nespd->ibpd.device;
3104                 nesqp->lsmm_mr = ibmr;
3105
3106                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3107                 set_wqe_64bit_value(wqe->wqe_words,
3108                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3109                                     u64temp);
3110                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3111                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3112                                     NES_IWARP_SQ_WQE_WRPDU);
3113                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3114                         cpu_to_le32(buff_len);
3115                 set_wqe_64bit_value(wqe->wqe_words,
3116                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3117                                     (u64)(unsigned long)(*start_buff));
3118                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3119                         cpu_to_le32(buff_len);
3120                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3121                 if (nesqp->sq_kmapped) {
3122                         nesqp->sq_kmapped = 0;
3123                         kunmap(nesqp->page);
3124                 }
3125
3126                 nesqp->nesqp_context->ird_ord_sizes |=
3127                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3128                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3129         } else {
3130                 nesqp->nesqp_context->ird_ord_sizes |=
3131                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3132         }
3133         nesqp->skip_lsmm = 1;
3134
3135
3136         /* Cache the cm_id in the qp */
3137         nesqp->cm_id = cm_id;
3138         cm_node->cm_id = cm_id;
3139
3140         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3141         cm_id->provider_data = nesqp;
3142         nesqp->active_conn = 0;
3143
3144         if (cm_node->state == NES_CM_STATE_TSA)
3145                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3146                           cm_node);
3147
3148         nes_cm_init_tsa_conn(nesqp, cm_node);
3149
3150         nesqp->nesqp_context->tcpPorts[0] =
3151                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3152         nesqp->nesqp_context->tcpPorts[1] =
3153                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3154
3155         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3156                 nesqp->nesqp_context->ip0 =
3157                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3158         else
3159                 nesqp->nesqp_context->ip0 =
3160                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3161
3162         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3163                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3164                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3165
3166         nesqp->nesqp_context->arp_index_vlan |=
3167                 cpu_to_le32(nes_arp_table(nesdev,
3168                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3169                                           NES_ARP_RESOLVE) << 16);
3170
3171         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3172                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3173
3174         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3175
3176         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3177                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3178         nesqp->nesqp_context->ird_ord_sizes |=
3179                 cpu_to_le32((u32)conn_param->ord);
3180
3181         memset(&nes_quad, 0, sizeof(nes_quad));
3182         nes_quad.DstIpAdrIndex =
3183                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3184         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3185                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3186         else
3187                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3188         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3189         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3190
3191         /* Produce hash key */
3192         crc_value = get_crc_value(&nes_quad);
3193         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3194         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3195                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3196
3197         nesqp->hte_index &= adapter->hte_index_mask;
3198         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3199
3200         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3201
3202         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3203                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3204                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3205                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3206                   ntohs(cm_id->remote_addr.sin_port),
3207                   ntohl(cm_id->local_addr.sin_addr.s_addr),
3208                   ntohs(cm_id->local_addr.sin_port),
3209                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3210                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3211                   buff_len);
3212
3213         /* notify OF layer that accept event was successful */
3214         cm_id->add_ref(cm_id);
3215         nes_add_ref(&nesqp->ibqp);
3216
3217         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3218         cm_event.status = 0;
3219         cm_event.provider_data = (void *)nesqp;
3220         cm_event.local_addr = cm_id->local_addr;
3221         cm_event.remote_addr = cm_id->remote_addr;
3222         cm_event.private_data = NULL;
3223         cm_event.private_data_len = 0;
3224         ret = cm_id->event_handler(cm_id, &cm_event);
3225         attr.qp_state = IB_QPS_RTS;
3226         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3227         if (cm_node->loopbackpartner) {
3228                 cm_node->loopbackpartner->mpa_frame_size =
3229                         nesqp->private_data_len;
3230                 /* copy entire MPA frame to our cm_node's frame */
3231                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3232                        conn_param->private_data, conn_param->private_data_len);
3233                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3234         }
3235         if (ret)
3236                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3237                        "ret=%d\n", __func__, __LINE__, ret);
3238
3239         return 0;
3240 }
3241
3242
3243 /**
3244  * nes_reject
3245  */
3246 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3247 {
3248         struct nes_cm_node *cm_node;
3249         struct nes_cm_node *loopback;
3250         struct nes_cm_core *cm_core;
3251         u8 *start_buff;
3252
3253         atomic_inc(&cm_rejects);
3254         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3255         loopback = cm_node->loopbackpartner;
3256         cm_core = cm_node->cm_core;
3257         cm_node->cm_id = cm_id;
3258
3259         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3260                 return -EINVAL;
3261
3262         if (loopback) {
3263                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3264                 loopback->mpa_frame.priv_data_len = pdata_len;
3265                 loopback->mpa_frame_size = pdata_len;
3266         } else {
3267                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3268                 cm_node->mpa_frame_size = pdata_len;
3269                 memcpy(start_buff, pdata, pdata_len);
3270         }
3271         return cm_core->api->reject(cm_core, cm_node);
3272 }
3273
3274
3275 /**
3276  * nes_connect
3277  * setup and launch cm connect node
3278  */
3279 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3280 {
3281         struct ib_qp *ibqp;
3282         struct nes_qp *nesqp;
3283         struct nes_vnic *nesvnic;
3284         struct nes_device *nesdev;
3285         struct nes_cm_node *cm_node;
3286         struct nes_cm_info cm_info;
3287         int apbvt_set = 0;
3288
3289         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3290         if (!ibqp)
3291                 return -EINVAL;
3292         nesqp = to_nesqp(ibqp);
3293         if (!nesqp)
3294                 return -EINVAL;
3295         nesvnic = to_nesvnic(nesqp->ibqp.device);
3296         if (!nesvnic)
3297                 return -EINVAL;
3298         nesdev = nesvnic->nesdev;
3299         if (!nesdev)
3300                 return -EINVAL;
3301
3302         if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3303                 return -EINVAL;
3304
3305         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3306                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3307                   ntohl(nesvnic->local_ipaddr),
3308                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3309                   ntohs(cm_id->remote_addr.sin_port),
3310                   ntohl(cm_id->local_addr.sin_addr.s_addr),
3311                   ntohs(cm_id->local_addr.sin_port));
3312
3313         atomic_inc(&cm_connects);
3314         nesqp->active_conn = 1;
3315
3316         /* cache the cm_id in the qp */
3317         nesqp->cm_id = cm_id;
3318
3319         cm_id->provider_data = nesqp;
3320
3321         nesqp->private_data_len = conn_param->private_data_len;
3322         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3323         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3324         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3325                   conn_param->private_data_len);
3326
3327         if (cm_id->local_addr.sin_addr.s_addr !=
3328             cm_id->remote_addr.sin_addr.s_addr) {
3329                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3330                                  PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3331                 apbvt_set = 1;
3332         }
3333
3334         /* set up the connection params for the node */
3335         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3336         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3337         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3338         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3339         cm_info.cm_id = cm_id;
3340         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3341
3342         cm_id->add_ref(cm_id);
3343
3344         /* create a connect CM node connection */
3345         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3346                                           conn_param->private_data_len, (void *)conn_param->private_data,
3347                                           &cm_info);
3348         if (!cm_node) {
3349                 if (apbvt_set)
3350                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3351                                          PCI_FUNC(nesdev->pcidev->devfn),
3352                                          NES_MANAGE_APBVT_DEL);
3353
3354                 cm_id->rem_ref(cm_id);
3355                 return -ENOMEM;
3356         }
3357
3358         cm_node->apbvt_set = apbvt_set;
3359         nesqp->cm_node = cm_node;
3360         cm_node->nesqp = nesqp;
3361         nes_add_ref(&nesqp->ibqp);
3362
3363         return 0;
3364 }
3365
3366
3367 /**
3368  * nes_create_listen
3369  */
3370 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3371 {
3372         struct nes_vnic *nesvnic;
3373         struct nes_cm_listener *cm_node;
3374         struct nes_cm_info cm_info;
3375         int err;
3376
3377         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3378                         cm_id, ntohs(cm_id->local_addr.sin_port));
3379
3380         nesvnic = to_nesvnic(cm_id->device);
3381         if (!nesvnic)
3382                 return -EINVAL;
3383
3384         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3385                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3386
3387         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3388                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3389
3390         /* setup listen params in our api call struct */
3391         cm_info.loc_addr = nesvnic->local_ipaddr;
3392         cm_info.loc_port = cm_id->local_addr.sin_port;
3393         cm_info.backlog = backlog;
3394         cm_info.cm_id = cm_id;
3395
3396         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3397
3398
3399         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3400         if (!cm_node) {
3401                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3402                        __func__, __LINE__);
3403                 return -ENOMEM;
3404         }
3405
3406         cm_id->provider_data = cm_node;
3407
3408         if (!cm_node->reused_node) {
3409                 err = nes_manage_apbvt(nesvnic,
3410                                        ntohs(cm_id->local_addr.sin_port),
3411                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3412                                        NES_MANAGE_APBVT_ADD);
3413                 if (err) {
3414                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3415                                err);
3416                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3417                         return err;
3418                 }
3419                 atomic_inc(&cm_listens_created);
3420         }
3421
3422         cm_id->add_ref(cm_id);
3423         cm_id->provider_data = (void *)cm_node;
3424
3425
3426         return 0;
3427 }
3428
3429
3430 /**
3431  * nes_destroy_listen
3432  */
3433 int nes_destroy_listen(struct iw_cm_id *cm_id)
3434 {
3435         if (cm_id->provider_data)
3436                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3437         else
3438                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3439
3440         cm_id->rem_ref(cm_id);
3441
3442         return 0;
3443 }
3444
3445
3446 /**
3447  * nes_cm_recv
3448  */
3449 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3450 {
3451         int rc = 0;
3452
3453         cm_packets_received++;
3454         if ((g_cm_core) && (g_cm_core->api))
3455                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3456         else
3457                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3458                           " cm is not setup properly.\n");
3459
3460         return rc;
3461 }
3462
3463
3464 /**
3465  * nes_cm_start
3466  * Start and init a cm core module
3467  */
3468 int nes_cm_start(void)
3469 {
3470         nes_debug(NES_DBG_CM, "\n");
3471         /* create the primary CM core, pass this handle to subsequent core inits */
3472         g_cm_core = nes_cm_alloc_core();
3473         if (g_cm_core)
3474                 return 0;
3475         else
3476                 return -ENOMEM;
3477 }
3478
3479
3480 /**
3481  * nes_cm_stop
3482  * stop and dealloc all cm core instances
3483  */
3484 int nes_cm_stop(void)
3485 {
3486         g_cm_core->api->destroy_cm_core(g_cm_core);
3487         return 0;
3488 }
3489
3490
3491 /**
3492  * cm_event_connected
3493  * handle a connected event, setup QPs and HW
3494  */
3495 static void cm_event_connected(struct nes_cm_event *event)
3496 {
3497         struct nes_qp *nesqp;
3498         struct nes_vnic *nesvnic;
3499         struct nes_device *nesdev;
3500         struct nes_cm_node *cm_node;
3501         struct nes_adapter *nesadapter;
3502         struct ib_qp_attr attr;
3503         struct iw_cm_id *cm_id;
3504         struct iw_cm_event cm_event;
3505         struct nes_v4_quad nes_quad;
3506         u32 crc_value;
3507         int ret;
3508
3509         /* get all our handles */
3510         cm_node = event->cm_node;
3511         cm_id = cm_node->cm_id;
3512         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3513         nesqp = (struct nes_qp *)cm_id->provider_data;
3514         nesvnic = to_nesvnic(nesqp->ibqp.device);
3515         nesdev = nesvnic->nesdev;
3516         nesadapter = nesdev->nesadapter;
3517
3518         if (nesqp->destroyed)
3519                 return;
3520         atomic_inc(&cm_connecteds);
3521         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3522                   " local port 0x%04X. jiffies = %lu.\n",
3523                   nesqp->hwqp.qp_id,
3524                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3525                   ntohs(cm_id->remote_addr.sin_port),
3526                   ntohs(cm_id->local_addr.sin_port),
3527                   jiffies);
3528
3529         nes_cm_init_tsa_conn(nesqp, cm_node);
3530
3531         /* set the QP tsa context */
3532         nesqp->nesqp_context->tcpPorts[0] =
3533                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3534         nesqp->nesqp_context->tcpPorts[1] =
3535                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3536         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3537                 nesqp->nesqp_context->ip0 =
3538                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3539         else
3540                 nesqp->nesqp_context->ip0 =
3541                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3542
3543         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3544                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3545                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3546         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3547                         nes_arp_table(nesdev,
3548                         le32_to_cpu(nesqp->nesqp_context->ip0),
3549                         NULL, NES_ARP_RESOLVE) << 16);
3550         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3551                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3552         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3553         nesqp->nesqp_context->ird_ord_sizes |=
3554                         cpu_to_le32((u32)1 <<
3555                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3556
3557         /* Adjust tail for not having a LSMM */
3558         /*nesqp->hwqp.sq_tail = 1;*/
3559
3560         build_rdma0_msg(cm_node, &nesqp);
3561
3562         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3563                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3564
3565         memset(&nes_quad, 0, sizeof(nes_quad));
3566
3567         nes_quad.DstIpAdrIndex =
3568                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3569         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3570                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3571         else
3572                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3573         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3574         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3575
3576         /* Produce hash key */
3577         crc_value = get_crc_value(&nes_quad);
3578         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3579         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3580                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3581
3582         nesqp->hte_index &= nesadapter->hte_index_mask;
3583         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3584
3585         nesqp->ietf_frame = &cm_node->mpa_frame;
3586         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3587         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3588
3589         /* notify OF layer we successfully created the requested connection */
3590         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3591         cm_event.status = 0;
3592         cm_event.provider_data = cm_id->provider_data;
3593         cm_event.local_addr.sin_family = AF_INET;
3594         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3595         cm_event.remote_addr = cm_id->remote_addr;
3596
3597         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3598         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3599         cm_event.ird = cm_node->ird_size;
3600         cm_event.ord = cm_node->ord_size;
3601
3602         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3603         ret = cm_id->event_handler(cm_id, &cm_event);
3604         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3605
3606         if (ret)
3607                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3608                        "ret=%d\n", __func__, __LINE__, ret);
3609         attr.qp_state = IB_QPS_RTS;
3610         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3611
3612         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3613                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3614
3615         return;
3616 }
3617
3618
3619 /**
3620  * cm_event_connect_error
3621  */
3622 static void cm_event_connect_error(struct nes_cm_event *event)
3623 {
3624         struct nes_qp *nesqp;
3625         struct iw_cm_id *cm_id;
3626         struct iw_cm_event cm_event;
3627         /* struct nes_cm_info cm_info; */
3628         int ret;
3629
3630         if (!event->cm_node)
3631                 return;
3632
3633         cm_id = event->cm_node->cm_id;
3634         if (!cm_id)
3635                 return;
3636
3637         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3638         nesqp = cm_id->provider_data;
3639
3640         if (!nesqp)
3641                 return;
3642
3643         /* notify OF layer about this connection error event */
3644         /* cm_id->rem_ref(cm_id); */
3645         nesqp->cm_id = NULL;
3646         cm_id->provider_data = NULL;
3647         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3648         cm_event.status = -ECONNRESET;
3649         cm_event.provider_data = cm_id->provider_data;
3650         cm_event.local_addr = cm_id->local_addr;
3651         cm_event.remote_addr = cm_id->remote_addr;
3652         cm_event.private_data = NULL;
3653         cm_event.private_data_len = 0;
3654
3655         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3656                   "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3657                   cm_event.remote_addr.sin_addr.s_addr);
3658
3659         ret = cm_id->event_handler(cm_id, &cm_event);
3660         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3661         if (ret)
3662                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3663                        "ret=%d\n", __func__, __LINE__, ret);
3664         cm_id->rem_ref(cm_id);
3665
3666         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3667         return;
3668 }
3669
3670
3671 /**
3672  * cm_event_reset
3673  */
3674 static void cm_event_reset(struct nes_cm_event *event)
3675 {
3676         struct nes_qp *nesqp;
3677         struct iw_cm_id *cm_id;
3678         struct iw_cm_event cm_event;
3679         /* struct nes_cm_info cm_info; */
3680         int ret;
3681
3682         if (!event->cm_node)
3683                 return;
3684
3685         if (!event->cm_node->cm_id)
3686                 return;
3687
3688         cm_id = event->cm_node->cm_id;
3689
3690         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3691         nesqp = cm_id->provider_data;
3692         if (!nesqp)
3693                 return;
3694
3695         nesqp->cm_id = NULL;
3696         /* cm_id->provider_data = NULL; */
3697         cm_event.event = IW_CM_EVENT_DISCONNECT;
3698         cm_event.status = -ECONNRESET;
3699         cm_event.provider_data = cm_id->provider_data;
3700         cm_event.local_addr = cm_id->local_addr;
3701         cm_event.remote_addr = cm_id->remote_addr;
3702         cm_event.private_data = NULL;
3703         cm_event.private_data_len = 0;
3704
3705         cm_id->add_ref(cm_id);
3706         ret = cm_id->event_handler(cm_id, &cm_event);
3707         atomic_inc(&cm_closes);
3708         cm_event.event = IW_CM_EVENT_CLOSE;
3709         cm_event.status = 0;
3710         cm_event.provider_data = cm_id->provider_data;
3711         cm_event.local_addr = cm_id->local_addr;
3712         cm_event.remote_addr = cm_id->remote_addr;
3713         cm_event.private_data = NULL;
3714         cm_event.private_data_len = 0;
3715         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3716         ret = cm_id->event_handler(cm_id, &cm_event);
3717
3718         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3719
3720
3721         /* notify OF layer about this connection error event */
3722         cm_id->rem_ref(cm_id);
3723
3724         return;
3725 }
3726
3727
3728 /**
3729  * cm_event_mpa_req
3730  */
3731 static void cm_event_mpa_req(struct nes_cm_event *event)
3732 {
3733         struct iw_cm_id *cm_id;
3734         struct iw_cm_event cm_event;
3735         int ret;
3736         struct nes_cm_node *cm_node;
3737
3738         cm_node = event->cm_node;
3739         if (!cm_node)
3740                 return;
3741         cm_id = cm_node->cm_id;
3742
3743         atomic_inc(&cm_connect_reqs);
3744         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3745                   cm_node, cm_id, jiffies);
3746
3747         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3748         cm_event.status = 0;
3749         cm_event.provider_data = (void *)cm_node;
3750
3751         cm_event.local_addr.sin_family = AF_INET;
3752         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3753         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3754
3755         cm_event.remote_addr.sin_family = AF_INET;
3756         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3757         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3758         cm_event.private_data = cm_node->mpa_frame_buf;
3759         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3760         cm_event.ird = cm_node->ird_size;
3761         cm_event.ord = cm_node->ord_size;
3762
3763         ret = cm_id->event_handler(cm_id, &cm_event);
3764         if (ret)
3765                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3766                        __func__, __LINE__, ret);
3767         return;
3768 }
3769
3770
3771 static void cm_event_mpa_reject(struct nes_cm_event *event)
3772 {
3773         struct iw_cm_id *cm_id;
3774         struct iw_cm_event cm_event;
3775         struct nes_cm_node *cm_node;
3776         int ret;
3777
3778         cm_node = event->cm_node;
3779         if (!cm_node)
3780                 return;
3781         cm_id = cm_node->cm_id;
3782
3783         atomic_inc(&cm_connect_reqs);
3784         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3785                   cm_node, cm_id, jiffies);
3786
3787         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3788         cm_event.status = -ECONNREFUSED;
3789         cm_event.provider_data = cm_id->provider_data;
3790
3791         cm_event.local_addr.sin_family = AF_INET;
3792         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3793         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3794
3795         cm_event.remote_addr.sin_family = AF_INET;
3796         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3797         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3798
3799         cm_event.private_data = cm_node->mpa_frame_buf;
3800         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3801
3802         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3803                   "remove_addr=%08x\n",
3804                   cm_event.local_addr.sin_addr.s_addr,
3805                   cm_event.remote_addr.sin_addr.s_addr);
3806
3807         ret = cm_id->event_handler(cm_id, &cm_event);
3808         if (ret)
3809                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3810                        __func__, __LINE__, ret);
3811
3812         return;
3813 }
3814
3815
3816 static void nes_cm_event_handler(struct work_struct *);
3817
3818 /**
3819  * nes_cm_post_event
3820  * post an event to the cm event handler
3821  */
3822 static int nes_cm_post_event(struct nes_cm_event *event)
3823 {
3824         atomic_inc(&event->cm_node->cm_core->events_posted);
3825         add_ref_cm_node(event->cm_node);
3826         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3827         INIT_WORK(&event->event_work, nes_cm_event_handler);
3828         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3829                   event->cm_node, event);
3830
3831         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3832
3833         nes_debug(NES_DBG_CM, "Exit\n");
3834         return 0;
3835 }
3836
3837
3838 /**
3839  * nes_cm_event_handler
3840  * worker function to handle cm events
3841  * will free instance of nes_cm_event
3842  */
3843 static void nes_cm_event_handler(struct work_struct *work)
3844 {
3845         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3846                                                   event_work);
3847         struct nes_cm_core *cm_core;
3848
3849         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3850                 return;
3851
3852         cm_core = event->cm_node->cm_core;
3853         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3854                   event, event->type, atomic_read(&cm_core->events_posted));
3855
3856         switch (event->type) {
3857         case NES_CM_EVENT_MPA_REQ:
3858                 cm_event_mpa_req(event);
3859                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3860                           event->cm_node);
3861                 break;
3862         case NES_CM_EVENT_RESET:
3863                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3864                           event->cm_node);
3865                 cm_event_reset(event);
3866                 break;
3867         case NES_CM_EVENT_CONNECTED:
3868                 if ((!event->cm_node->cm_id) ||
3869                     (event->cm_node->state != NES_CM_STATE_TSA))
3870                         break;
3871                 cm_event_connected(event);
3872                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3873                 break;
3874         case NES_CM_EVENT_MPA_REJECT:
3875                 if ((!event->cm_node->cm_id) ||
3876                     (event->cm_node->state == NES_CM_STATE_TSA))
3877                         break;
3878                 cm_event_mpa_reject(event);
3879                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3880                 break;
3881
3882         case NES_CM_EVENT_ABORTED:
3883                 if ((!event->cm_node->cm_id) ||
3884                     (event->cm_node->state == NES_CM_STATE_TSA))
3885                         break;
3886                 cm_event_connect_error(event);
3887                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3888                 break;
3889         case NES_CM_EVENT_DROPPED_PKT:
3890                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3891                 break;
3892         default:
3893                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3894                 break;
3895         }
3896
3897         atomic_dec(&cm_core->events_posted);
3898         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3899         rem_ref_cm_node(cm_core, event->cm_node);
3900         kfree(event);
3901
3902         return;
3903 }