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         rcu_read_lock();
1360         neigh = dst_get_neighbour_noref(&rt->dst);
1361         if (neigh) {
1362                 if (neigh->nud_state & NUD_VALID) {
1363                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1364                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1365                                   neigh->ha, ntohl(rt->rt_gateway));
1366
1367                         if (arpindex >= 0) {
1368                                 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1369                                             neigh->ha, ETH_ALEN)) {
1370                                         /* Mac address same as in nes_arp_table */
1371                                         goto out;
1372                                 }
1373
1374                                 nes_manage_arp_cache(nesvnic->netdev,
1375                                                      nesadapter->arp_table[arpindex].mac_addr,
1376                                                      dst_ip, NES_ARP_DELETE);
1377                         }
1378
1379                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1380                                              dst_ip, NES_ARP_ADD);
1381                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1382                                            NES_ARP_RESOLVE);
1383                 } else {
1384                         neigh_event_send(neigh, NULL);
1385                 }
1386         }
1387
1388 out:
1389         rcu_read_unlock();
1390         ip_rt_put(rt);
1391         return rc;
1392 }
1393
1394 /**
1395  * make_cm_node - create a new instance of a cm node
1396  */
1397 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1398                                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1399                                         struct nes_cm_listener *listener)
1400 {
1401         struct nes_cm_node *cm_node;
1402         struct timespec ts;
1403         int oldarpindex = 0;
1404         int arpindex = 0;
1405         struct nes_device *nesdev;
1406         struct nes_adapter *nesadapter;
1407
1408         /* create an hte and cm_node for this instance */
1409         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1410         if (!cm_node)
1411                 return NULL;
1412
1413         /* set our node specific transport info */
1414         cm_node->loc_addr = cm_info->loc_addr;
1415         cm_node->rem_addr = cm_info->rem_addr;
1416         cm_node->loc_port = cm_info->loc_port;
1417         cm_node->rem_port = cm_info->rem_port;
1418
1419         cm_node->mpa_frame_rev = mpa_version;
1420         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1421         cm_node->ird_size = IETF_NO_IRD_ORD;
1422         cm_node->ord_size = IETF_NO_IRD_ORD;
1423
1424         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1425                   &cm_node->loc_addr, cm_node->loc_port,
1426                   &cm_node->rem_addr, cm_node->rem_port);
1427         cm_node->listener = listener;
1428         cm_node->netdev = nesvnic->netdev;
1429         cm_node->cm_id = cm_info->cm_id;
1430         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1431
1432         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1433                   cm_node->cm_id);
1434
1435         spin_lock_init(&cm_node->retrans_list_lock);
1436
1437         cm_node->loopbackpartner = NULL;
1438         atomic_set(&cm_node->ref_count, 1);
1439         /* associate our parent CM core */
1440         cm_node->cm_core = cm_core;
1441         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1442         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1443         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1444                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1445         ts = current_kernel_time();
1446         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1447         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1448                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1449         cm_node->tcp_cntxt.rcv_nxt = 0;
1450         /* get a unique session ID , add thread_id to an upcounter to handle race */
1451         atomic_inc(&cm_core->node_cnt);
1452         cm_node->conn_type = cm_info->conn_type;
1453         cm_node->apbvt_set = 0;
1454         cm_node->accept_pend = 0;
1455
1456         cm_node->nesvnic = nesvnic;
1457         /* get some device handles, for arp lookup */
1458         nesdev = nesvnic->nesdev;
1459         nesadapter = nesdev->nesadapter;
1460
1461         cm_node->loopbackpartner = NULL;
1462
1463         /* get the mac addr for the remote node */
1464         if (ipv4_is_loopback(htonl(cm_node->rem_addr))) {
1465                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1466         } else {
1467                 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1468                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1469         }
1470         if (arpindex < 0) {
1471                 kfree(cm_node);
1472                 return NULL;
1473         }
1474
1475         /* copy the mac addr to node context */
1476         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1477         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1478                   cm_node->rem_mac);
1479
1480         add_hte_node(cm_core, cm_node);
1481         atomic_inc(&cm_nodes_created);
1482
1483         return cm_node;
1484 }
1485
1486
1487 /**
1488  * add_ref_cm_node - destroy an instance of a cm node
1489  */
1490 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1491 {
1492         atomic_inc(&cm_node->ref_count);
1493         return 0;
1494 }
1495
1496
1497 /**
1498  * rem_ref_cm_node - destroy an instance of a cm node
1499  */
1500 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1501                            struct nes_cm_node *cm_node)
1502 {
1503         unsigned long flags;
1504         struct nes_qp *nesqp;
1505
1506         if (!cm_node)
1507                 return -EINVAL;
1508
1509         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1510         if (atomic_dec_return(&cm_node->ref_count)) {
1511                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1512                 return 0;
1513         }
1514         list_del(&cm_node->list);
1515         atomic_dec(&cm_core->ht_node_cnt);
1516         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1517
1518         /* if the node is destroyed before connection was accelerated */
1519         if (!cm_node->accelerated && cm_node->accept_pend) {
1520                 BUG_ON(!cm_node->listener);
1521                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1522                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1523         }
1524         WARN_ON(cm_node->send_entry);
1525         if (cm_node->recv_entry)
1526                 handle_recv_entry(cm_node, 0);
1527         if (cm_node->listener) {
1528                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1529         } else {
1530                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1531                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1532                                          PCI_FUNC(
1533                                                  cm_node->nesvnic->nesdev->pcidev->devfn),
1534                                          NES_MANAGE_APBVT_DEL);
1535                 }
1536         }
1537
1538         atomic_dec(&cm_core->node_cnt);
1539         atomic_inc(&cm_nodes_destroyed);
1540         nesqp = cm_node->nesqp;
1541         if (nesqp) {
1542                 nesqp->cm_node = NULL;
1543                 nes_rem_ref(&nesqp->ibqp);
1544                 cm_node->nesqp = NULL;
1545         }
1546
1547         kfree(cm_node);
1548         return 0;
1549 }
1550
1551 /**
1552  * process_options
1553  */
1554 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1555                            u32 optionsize, u32 syn_packet)
1556 {
1557         u32 tmp;
1558         u32 offset = 0;
1559         union all_known_options *all_options;
1560         char got_mss_option = 0;
1561
1562         while (offset < optionsize) {
1563                 all_options = (union all_known_options *)(optionsloc + offset);
1564                 switch (all_options->as_base.optionnum) {
1565                 case OPTION_NUMBER_END:
1566                         offset = optionsize;
1567                         break;
1568                 case OPTION_NUMBER_NONE:
1569                         offset += 1;
1570                         continue;
1571                 case OPTION_NUMBER_MSS:
1572                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1573                                   "Size: %d\n", __func__,
1574                                   all_options->as_mss.length, offset, optionsize);
1575                         got_mss_option = 1;
1576                         if (all_options->as_mss.length != 4) {
1577                                 return 1;
1578                         } else {
1579                                 tmp = ntohs(all_options->as_mss.mss);
1580                                 if (tmp > 0 && tmp <
1581                                     cm_node->tcp_cntxt.mss)
1582                                         cm_node->tcp_cntxt.mss = tmp;
1583                         }
1584                         break;
1585                 case OPTION_NUMBER_WINDOW_SCALE:
1586                         cm_node->tcp_cntxt.snd_wscale =
1587                                 all_options->as_windowscale.shiftcount;
1588                         break;
1589                 default:
1590                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1591                                   all_options->as_base.optionnum);
1592                         break;
1593                 }
1594                 offset += all_options->as_base.length;
1595         }
1596         if ((!got_mss_option) && (syn_packet))
1597                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1598         return 0;
1599 }
1600
1601 static void drop_packet(struct sk_buff *skb)
1602 {
1603         atomic_inc(&cm_accel_dropped_pkts);
1604         dev_kfree_skb_any(skb);
1605 }
1606
1607 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1608 {
1609         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1610                   "refcnt=%d\n", cm_node, cm_node->state,
1611                   atomic_read(&cm_node->ref_count));
1612         switch (cm_node->state) {
1613         case NES_CM_STATE_SYN_RCVD:
1614         case NES_CM_STATE_SYN_SENT:
1615         case NES_CM_STATE_ESTABLISHED:
1616         case NES_CM_STATE_MPAREJ_RCVD:
1617                 cm_node->tcp_cntxt.rcv_nxt++;
1618                 cleanup_retrans_entry(cm_node);
1619                 cm_node->state = NES_CM_STATE_LAST_ACK;
1620                 send_fin(cm_node, NULL);
1621                 break;
1622         case NES_CM_STATE_MPAREQ_SENT:
1623                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1624                 cm_node->tcp_cntxt.rcv_nxt++;
1625                 cleanup_retrans_entry(cm_node);
1626                 cm_node->state = NES_CM_STATE_CLOSED;
1627                 add_ref_cm_node(cm_node);
1628                 send_reset(cm_node, NULL);
1629                 break;
1630         case NES_CM_STATE_FIN_WAIT1:
1631                 cm_node->tcp_cntxt.rcv_nxt++;
1632                 cleanup_retrans_entry(cm_node);
1633                 cm_node->state = NES_CM_STATE_CLOSING;
1634                 send_ack(cm_node, NULL);
1635                 /* Wait for ACK as this is simultaneous close..
1636                 * After we receive ACK, do not send anything..
1637                 * Just rm the node.. Done.. */
1638                 break;
1639         case NES_CM_STATE_FIN_WAIT2:
1640                 cm_node->tcp_cntxt.rcv_nxt++;
1641                 cleanup_retrans_entry(cm_node);
1642                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1643                 send_ack(cm_node, NULL);
1644                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1645                 break;
1646         case NES_CM_STATE_TIME_WAIT:
1647                 cm_node->tcp_cntxt.rcv_nxt++;
1648                 cleanup_retrans_entry(cm_node);
1649                 cm_node->state = NES_CM_STATE_CLOSED;
1650                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1651                 break;
1652         case NES_CM_STATE_TSA:
1653         default:
1654                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1655                         cm_node, cm_node->state);
1656                 break;
1657         }
1658 }
1659
1660
1661 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1662         struct tcphdr *tcph)
1663 {
1664
1665         int     reset = 0;      /* whether to send reset in case of err.. */
1666         atomic_inc(&cm_resets_recvd);
1667         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1668                         " refcnt=%d\n", cm_node, cm_node->state,
1669                         atomic_read(&cm_node->ref_count));
1670         cleanup_retrans_entry(cm_node);
1671         switch (cm_node->state) {
1672         case NES_CM_STATE_SYN_SENT:
1673         case NES_CM_STATE_MPAREQ_SENT:
1674                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1675                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1676                         cm_node->listener, cm_node->state);
1677                 switch (cm_node->mpa_frame_rev) {
1678                 case IETF_MPA_V2:
1679                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1680                         /* send a syn and goto syn sent state */
1681                         cm_node->state = NES_CM_STATE_SYN_SENT;
1682                         if (send_syn(cm_node, 0, NULL)) {
1683                                 active_open_err(cm_node, skb, reset);
1684                         }
1685                         break;
1686                 case IETF_MPA_V1:
1687                 default:
1688                         active_open_err(cm_node, skb, reset);
1689                         break;
1690                 }
1691                 break;
1692         case NES_CM_STATE_MPAREQ_RCVD:
1693                 atomic_inc(&cm_node->passive_state);
1694                 dev_kfree_skb_any(skb);
1695                 break;
1696         case NES_CM_STATE_ESTABLISHED:
1697         case NES_CM_STATE_SYN_RCVD:
1698         case NES_CM_STATE_LISTENING:
1699                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1700                 passive_open_err(cm_node, skb, reset);
1701                 break;
1702         case NES_CM_STATE_TSA:
1703                 active_open_err(cm_node, skb, reset);
1704                 break;
1705         case NES_CM_STATE_CLOSED:
1706                 drop_packet(skb);
1707                 break;
1708         case NES_CM_STATE_FIN_WAIT2:
1709         case NES_CM_STATE_FIN_WAIT1:
1710         case NES_CM_STATE_LAST_ACK:
1711                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1712         case NES_CM_STATE_TIME_WAIT:
1713                 cm_node->state = NES_CM_STATE_CLOSED;
1714                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1715                 drop_packet(skb);
1716                 break;
1717         default:
1718                 drop_packet(skb);
1719                 break;
1720         }
1721 }
1722
1723
1724 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1725 {
1726         int ret = 0;
1727         int datasize = skb->len;
1728         u8 *dataloc = skb->data;
1729
1730         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1731         u32 res_type;
1732
1733         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1734         if (ret) {
1735                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1736                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1737                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1738                                   "cm_node=%p listener=%p state=%d\n", __func__,
1739                                   __LINE__, cm_node, cm_node->listener,
1740                                   cm_node->state);
1741                         active_open_err(cm_node, skb, 1);
1742                 } else {
1743                         passive_open_err(cm_node, skb, 1);
1744                 }
1745                 return;
1746         }
1747
1748         switch (cm_node->state) {
1749         case NES_CM_STATE_ESTABLISHED:
1750                 if (res_type == NES_MPA_REQUEST_REJECT)
1751                         /*BIG problem as we are receiving the MPA.. So should
1752                          * not be REJECT.. This is Passive Open.. We can
1753                          * only receive it Reject for Active Open...*/
1754                         WARN_ON(1);
1755                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1756                 type = NES_CM_EVENT_MPA_REQ;
1757                 atomic_set(&cm_node->passive_state,
1758                            NES_PASSIVE_STATE_INDICATED);
1759                 break;
1760         case NES_CM_STATE_MPAREQ_SENT:
1761                 cleanup_retrans_entry(cm_node);
1762                 if (res_type == NES_MPA_REQUEST_REJECT) {
1763                         type = NES_CM_EVENT_MPA_REJECT;
1764                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1765                 } else {
1766                         type = NES_CM_EVENT_CONNECTED;
1767                         cm_node->state = NES_CM_STATE_TSA;
1768                 }
1769
1770                 break;
1771         default:
1772                 WARN_ON(1);
1773                 break;
1774         }
1775         dev_kfree_skb_any(skb);
1776         create_event(cm_node, type);
1777 }
1778
1779 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1780 {
1781         switch (cm_node->state) {
1782         case NES_CM_STATE_SYN_SENT:
1783         case NES_CM_STATE_MPAREQ_SENT:
1784                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1785                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1786                           cm_node->listener, cm_node->state);
1787                 active_open_err(cm_node, skb, 1);
1788                 break;
1789         case NES_CM_STATE_ESTABLISHED:
1790         case NES_CM_STATE_SYN_RCVD:
1791                 passive_open_err(cm_node, skb, 1);
1792                 break;
1793         case NES_CM_STATE_TSA:
1794         default:
1795                 drop_packet(skb);
1796         }
1797 }
1798
1799 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1800                      struct sk_buff *skb)
1801 {
1802         int err;
1803
1804         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1805         if (err)
1806                 active_open_err(cm_node, skb, 1);
1807
1808         return err;
1809 }
1810
1811 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1812                      struct sk_buff *skb)
1813 {
1814         int err = 0;
1815         u32 seq;
1816         u32 ack_seq;
1817         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1818         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1819         u32 rcv_wnd;
1820
1821         seq = ntohl(tcph->seq);
1822         ack_seq = ntohl(tcph->ack_seq);
1823         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1824         if (ack_seq != loc_seq_num)
1825                 err = 1;
1826         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1827                 err = 1;
1828         if (err) {
1829                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1830                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1831                           cm_node->listener, cm_node->state);
1832                 indicate_pkt_err(cm_node, skb);
1833                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1834                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1835                           rcv_wnd);
1836         }
1837         return err;
1838 }
1839
1840 /*
1841  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1842  * is created with a listener or it may comein as rexmitted packet which in
1843  * that case will be just dropped.
1844  */
1845 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1846                            struct tcphdr *tcph)
1847 {
1848         int ret;
1849         u32 inc_sequence;
1850         int optionsize;
1851
1852         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1853         skb_trim(skb, 0);
1854         inc_sequence = ntohl(tcph->seq);
1855
1856         switch (cm_node->state) {
1857         case NES_CM_STATE_SYN_SENT:
1858         case NES_CM_STATE_MPAREQ_SENT:
1859                 /* Rcvd syn on active open connection*/
1860                 active_open_err(cm_node, skb, 1);
1861                 break;
1862         case NES_CM_STATE_LISTENING:
1863                 /* Passive OPEN */
1864                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1865                     cm_node->listener->backlog) {
1866                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1867                                   "pressure \n");
1868                         cm_backlog_drops++;
1869                         passive_open_err(cm_node, skb, 0);
1870                         break;
1871                 }
1872                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1873                                          1);
1874                 if (ret) {
1875                         passive_open_err(cm_node, skb, 0);
1876                         /* drop pkt */
1877                         break;
1878                 }
1879                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1880                 BUG_ON(cm_node->send_entry);
1881                 cm_node->accept_pend = 1;
1882                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1883
1884                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1885                 send_syn(cm_node, 1, skb);
1886                 break;
1887         case NES_CM_STATE_CLOSED:
1888                 cleanup_retrans_entry(cm_node);
1889                 add_ref_cm_node(cm_node);
1890                 send_reset(cm_node, skb);
1891                 break;
1892         case NES_CM_STATE_TSA:
1893         case NES_CM_STATE_ESTABLISHED:
1894         case NES_CM_STATE_FIN_WAIT1:
1895         case NES_CM_STATE_FIN_WAIT2:
1896         case NES_CM_STATE_MPAREQ_RCVD:
1897         case NES_CM_STATE_LAST_ACK:
1898         case NES_CM_STATE_CLOSING:
1899         case NES_CM_STATE_UNKNOWN:
1900         default:
1901                 drop_packet(skb);
1902                 break;
1903         }
1904 }
1905
1906 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1907                               struct tcphdr *tcph)
1908 {
1909         int ret;
1910         u32 inc_sequence;
1911         int optionsize;
1912
1913         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1914         skb_trim(skb, 0);
1915         inc_sequence = ntohl(tcph->seq);
1916         switch (cm_node->state) {
1917         case NES_CM_STATE_SYN_SENT:
1918                 cleanup_retrans_entry(cm_node);
1919                 /* active open */
1920                 if (check_syn(cm_node, tcph, skb))
1921                         return;
1922                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1923                 /* setup options */
1924                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1925                 if (ret) {
1926                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1927                                   cm_node);
1928                         break;
1929                 }
1930                 cleanup_retrans_entry(cm_node);
1931                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1932                 send_mpa_request(cm_node, skb);
1933                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1934                 break;
1935         case NES_CM_STATE_MPAREQ_RCVD:
1936                 /* passive open, so should not be here */
1937                 passive_open_err(cm_node, skb, 1);
1938                 break;
1939         case NES_CM_STATE_LISTENING:
1940                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1941                 cleanup_retrans_entry(cm_node);
1942                 cm_node->state = NES_CM_STATE_CLOSED;
1943                 send_reset(cm_node, skb);
1944                 break;
1945         case NES_CM_STATE_CLOSED:
1946                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1947                 cleanup_retrans_entry(cm_node);
1948                 add_ref_cm_node(cm_node);
1949                 send_reset(cm_node, skb);
1950                 break;
1951         case NES_CM_STATE_ESTABLISHED:
1952         case NES_CM_STATE_FIN_WAIT1:
1953         case NES_CM_STATE_FIN_WAIT2:
1954         case NES_CM_STATE_LAST_ACK:
1955         case NES_CM_STATE_TSA:
1956         case NES_CM_STATE_CLOSING:
1957         case NES_CM_STATE_UNKNOWN:
1958         case NES_CM_STATE_MPAREQ_SENT:
1959         default:
1960                 drop_packet(skb);
1961                 break;
1962         }
1963 }
1964
1965 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1966                           struct tcphdr *tcph)
1967 {
1968         int datasize = 0;
1969         u32 inc_sequence;
1970         int ret = 0;
1971         int optionsize;
1972
1973         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1974
1975         if (check_seq(cm_node, tcph, skb))
1976                 return -EINVAL;
1977
1978         skb_pull(skb, tcph->doff << 2);
1979         inc_sequence = ntohl(tcph->seq);
1980         datasize = skb->len;
1981         switch (cm_node->state) {
1982         case NES_CM_STATE_SYN_RCVD:
1983                 /* Passive OPEN */
1984                 cleanup_retrans_entry(cm_node);
1985                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1986                 if (ret)
1987                         break;
1988                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1989                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1990                 if (datasize) {
1991                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1992                         handle_rcv_mpa(cm_node, skb);
1993                 } else { /* rcvd ACK only */
1994                         dev_kfree_skb_any(skb);
1995                 }
1996                 break;
1997         case NES_CM_STATE_ESTABLISHED:
1998                 /* Passive OPEN */
1999                 cleanup_retrans_entry(cm_node);
2000                 if (datasize) {
2001                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2002                         handle_rcv_mpa(cm_node, skb);
2003                 } else {
2004                         drop_packet(skb);
2005                 }
2006                 break;
2007         case NES_CM_STATE_MPAREQ_SENT:
2008                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2009                 if (datasize) {
2010                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2011                         handle_rcv_mpa(cm_node, skb);
2012                 } else { /* Could be just an ack pkt.. */
2013                         dev_kfree_skb_any(skb);
2014                 }
2015                 break;
2016         case NES_CM_STATE_LISTENING:
2017                 cleanup_retrans_entry(cm_node);
2018                 cm_node->state = NES_CM_STATE_CLOSED;
2019                 send_reset(cm_node, skb);
2020                 break;
2021         case NES_CM_STATE_CLOSED:
2022                 cleanup_retrans_entry(cm_node);
2023                 add_ref_cm_node(cm_node);
2024                 send_reset(cm_node, skb);
2025                 break;
2026         case NES_CM_STATE_LAST_ACK:
2027         case NES_CM_STATE_CLOSING:
2028                 cleanup_retrans_entry(cm_node);
2029                 cm_node->state = NES_CM_STATE_CLOSED;
2030                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2031                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2032                 drop_packet(skb);
2033                 break;
2034         case NES_CM_STATE_FIN_WAIT1:
2035                 cleanup_retrans_entry(cm_node);
2036                 drop_packet(skb);
2037                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2038                 break;
2039         case NES_CM_STATE_SYN_SENT:
2040         case NES_CM_STATE_FIN_WAIT2:
2041         case NES_CM_STATE_TSA:
2042         case NES_CM_STATE_MPAREQ_RCVD:
2043         case NES_CM_STATE_UNKNOWN:
2044         default:
2045                 cleanup_retrans_entry(cm_node);
2046                 drop_packet(skb);
2047                 break;
2048         }
2049         return ret;
2050 }
2051
2052
2053
2054 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2055                               struct sk_buff *skb, int optionsize, int passive)
2056 {
2057         u8 *optionsloc = (u8 *)&tcph[1];
2058
2059         if (optionsize) {
2060                 if (process_options(cm_node, optionsloc, optionsize,
2061                                     (u32)tcph->syn)) {
2062                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2063                                   __func__, cm_node);
2064                         if (passive)
2065                                 passive_open_err(cm_node, skb, 1);
2066                         else
2067                                 active_open_err(cm_node, skb, 1);
2068                         return 1;
2069                 }
2070         }
2071
2072         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2073                                      cm_node->tcp_cntxt.snd_wscale;
2074
2075         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2076                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2077         return 0;
2078 }
2079
2080 /*
2081  * active_open_err() will send reset() if flag set..
2082  * It will also send ABORT event.
2083  */
2084 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2085                             int reset)
2086 {
2087         cleanup_retrans_entry(cm_node);
2088         if (reset) {
2089                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2090                           "state=%d\n", cm_node, cm_node->state);
2091                 add_ref_cm_node(cm_node);
2092                 send_reset(cm_node, skb);
2093         } else {
2094                 dev_kfree_skb_any(skb);
2095         }
2096
2097         cm_node->state = NES_CM_STATE_CLOSED;
2098         create_event(cm_node, NES_CM_EVENT_ABORTED);
2099 }
2100
2101 /*
2102  * passive_open_err() will either do a reset() or will free up the skb and
2103  * remove the cm_node.
2104  */
2105 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2106                              int reset)
2107 {
2108         cleanup_retrans_entry(cm_node);
2109         cm_node->state = NES_CM_STATE_CLOSED;
2110         if (reset) {
2111                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2112                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2113                 send_reset(cm_node, skb);
2114         } else {
2115                 dev_kfree_skb_any(skb);
2116                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2117         }
2118 }
2119
2120 /*
2121  * free_retrans_entry() routines assumes that the retrans_list_lock has
2122  * been acquired before calling.
2123  */
2124 static void free_retrans_entry(struct nes_cm_node *cm_node)
2125 {
2126         struct nes_timer_entry *send_entry;
2127
2128         send_entry = cm_node->send_entry;
2129         if (send_entry) {
2130                 cm_node->send_entry = NULL;
2131                 dev_kfree_skb_any(send_entry->skb);
2132                 kfree(send_entry);
2133                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2134         }
2135 }
2136
2137 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2138 {
2139         unsigned long flags;
2140
2141         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2142         free_retrans_entry(cm_node);
2143         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2144 }
2145
2146 /**
2147  * process_packet
2148  * Returns skb if to be freed, else it will return NULL if already used..
2149  */
2150 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2151                            struct nes_cm_core *cm_core)
2152 {
2153         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2154         struct tcphdr *tcph = tcp_hdr(skb);
2155         u32 fin_set = 0;
2156         int ret = 0;
2157
2158         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2159
2160         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2161                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2162                   tcph->ack, tcph->rst, tcph->fin);
2163
2164         if (tcph->rst) {
2165                 pkt_type = NES_PKT_TYPE_RST;
2166         } else if (tcph->syn) {
2167                 pkt_type = NES_PKT_TYPE_SYN;
2168                 if (tcph->ack)
2169                         pkt_type = NES_PKT_TYPE_SYNACK;
2170         } else if (tcph->ack) {
2171                 pkt_type = NES_PKT_TYPE_ACK;
2172         }
2173         if (tcph->fin)
2174                 fin_set = 1;
2175
2176         switch (pkt_type) {
2177         case NES_PKT_TYPE_SYN:
2178                 handle_syn_pkt(cm_node, skb, tcph);
2179                 break;
2180         case NES_PKT_TYPE_SYNACK:
2181                 handle_synack_pkt(cm_node, skb, tcph);
2182                 break;
2183         case NES_PKT_TYPE_ACK:
2184                 ret = handle_ack_pkt(cm_node, skb, tcph);
2185                 if (fin_set && !ret)
2186                         handle_fin_pkt(cm_node);
2187                 break;
2188         case NES_PKT_TYPE_RST:
2189                 handle_rst_pkt(cm_node, skb, tcph);
2190                 break;
2191         default:
2192                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2193                         handle_fin_pkt(cm_node);
2194                 drop_packet(skb);
2195                 break;
2196         }
2197 }
2198
2199 /**
2200  * mini_cm_listen - create a listen node with params
2201  */
2202 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2203                                               struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2204 {
2205         struct nes_cm_listener *listener;
2206         unsigned long flags;
2207
2208         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2209                   cm_info->loc_addr, cm_info->loc_port);
2210
2211         /* cannot have multiple matching listeners */
2212         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2213                                  htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2214         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2215                 /* find automatically incs ref count ??? */
2216                 atomic_dec(&listener->ref_count);
2217                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2218                 return NULL;
2219         }
2220
2221         if (!listener) {
2222                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2223                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2224                 if (!listener) {
2225                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2226                         return NULL;
2227                 }
2228
2229                 listener->loc_addr = htonl(cm_info->loc_addr);
2230                 listener->loc_port = htons(cm_info->loc_port);
2231                 listener->reused_node = 0;
2232
2233                 atomic_set(&listener->ref_count, 1);
2234         }
2235         /* pasive case */
2236         /* find already inc'ed the ref count */
2237         else {
2238                 listener->reused_node = 1;
2239         }
2240
2241         listener->cm_id = cm_info->cm_id;
2242         atomic_set(&listener->pend_accepts_cnt, 0);
2243         listener->cm_core = cm_core;
2244         listener->nesvnic = nesvnic;
2245         atomic_inc(&cm_core->node_cnt);
2246
2247         listener->conn_type = cm_info->conn_type;
2248         listener->backlog = cm_info->backlog;
2249         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2250
2251         if (!listener->reused_node) {
2252                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2253                 list_add(&listener->list, &cm_core->listen_list.list);
2254                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2255                 atomic_inc(&cm_core->listen_node_cnt);
2256         }
2257
2258         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2259                   " listener = %p, backlog = %d, cm_id = %p.\n",
2260                   cm_info->loc_addr, cm_info->loc_port,
2261                   listener, listener->backlog, listener->cm_id);
2262
2263         return listener;
2264 }
2265
2266
2267 /**
2268  * mini_cm_connect - make a connection node with params
2269  */
2270 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2271                                            struct nes_vnic *nesvnic, u16 private_data_len,
2272                                            void *private_data, struct nes_cm_info *cm_info)
2273 {
2274         int ret = 0;
2275         struct nes_cm_node *cm_node;
2276         struct nes_cm_listener *loopbackremotelistener;
2277         struct nes_cm_node *loopbackremotenode;
2278         struct nes_cm_info loopback_cm_info;
2279         u8 *start_buff;
2280
2281         /* create a CM connection node */
2282         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2283         if (!cm_node)
2284                 return NULL;
2285
2286         /* set our node side to client (active) side */
2287         cm_node->tcp_cntxt.client = 1;
2288         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2289
2290         if (cm_info->loc_addr == cm_info->rem_addr) {
2291                 loopbackremotelistener = find_listener(cm_core,
2292                                                        ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2293                                                        NES_CM_LISTENER_ACTIVE_STATE);
2294                 if (loopbackremotelistener == NULL) {
2295                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2296                 } else {
2297                         loopback_cm_info = *cm_info;
2298                         loopback_cm_info.loc_port = cm_info->rem_port;
2299                         loopback_cm_info.rem_port = cm_info->loc_port;
2300                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2301                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2302                                                           &loopback_cm_info, loopbackremotelistener);
2303                         if (!loopbackremotenode) {
2304                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2305                                 return NULL;
2306                         }
2307                         atomic_inc(&cm_loopbacks);
2308                         loopbackremotenode->loopbackpartner = cm_node;
2309                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2310                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2311                         cm_node->loopbackpartner = loopbackremotenode;
2312                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2313                                private_data_len);
2314                         loopbackremotenode->mpa_frame_size = private_data_len;
2315
2316                         /* we are done handling this state. */
2317                         /* set node to a TSA state */
2318                         cm_node->state = NES_CM_STATE_TSA;
2319                         cm_node->tcp_cntxt.rcv_nxt =
2320                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2321                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2322                                 cm_node->tcp_cntxt.loc_seq_num;
2323                         cm_node->tcp_cntxt.max_snd_wnd =
2324                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2325                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2326                                 cm_node->tcp_cntxt.rcv_wnd;
2327                         cm_node->tcp_cntxt.snd_wnd =
2328                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2329                         loopbackremotenode->tcp_cntxt.snd_wnd =
2330                                 cm_node->tcp_cntxt.rcv_wnd;
2331                         cm_node->tcp_cntxt.snd_wscale =
2332                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2333                         loopbackremotenode->tcp_cntxt.snd_wscale =
2334                                 cm_node->tcp_cntxt.rcv_wscale;
2335                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2336                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2337                 }
2338                 return cm_node;
2339         }
2340
2341         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2342         cm_node->mpa_frame_size = private_data_len;
2343
2344         memcpy(start_buff, private_data, private_data_len);
2345
2346         /* send a syn and goto syn sent state */
2347         cm_node->state = NES_CM_STATE_SYN_SENT;
2348         ret = send_syn(cm_node, 0, NULL);
2349
2350         if (ret) {
2351                 /* error in sending the syn free up the cm_node struct */
2352                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2353                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2354                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2355                           cm_node->cm_id);
2356                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2357                 cm_node = NULL;
2358         }
2359
2360         if (cm_node) {
2361                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2362                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2363                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2364                           cm_node->cm_id);
2365         }
2366
2367         return cm_node;
2368 }
2369
2370
2371 /**
2372  * mini_cm_accept - accept a connection
2373  * This function is never called
2374  */
2375 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2376 {
2377         return 0;
2378 }
2379
2380
2381 /**
2382  * mini_cm_reject - reject and teardown a connection
2383  */
2384 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2385 {
2386         int ret = 0;
2387         int err = 0;
2388         int passive_state;
2389         struct nes_cm_event event;
2390         struct iw_cm_id *cm_id = cm_node->cm_id;
2391         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2392
2393         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2394                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2395
2396         if (cm_node->tcp_cntxt.client)
2397                 return ret;
2398         cleanup_retrans_entry(cm_node);
2399
2400         if (!loopback) {
2401                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2402                 if (passive_state == NES_SEND_RESET_EVENT) {
2403                         cm_node->state = NES_CM_STATE_CLOSED;
2404                         rem_ref_cm_node(cm_core, cm_node);
2405                 } else {
2406                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2407                                 rem_ref_cm_node(cm_core, cm_node);
2408                         } else {
2409                                 ret = send_mpa_reject(cm_node);
2410                                 if (ret) {
2411                                         cm_node->state = NES_CM_STATE_CLOSED;
2412                                         err = send_reset(cm_node, NULL);
2413                                         if (err)
2414                                                 WARN_ON(1);
2415                                 } else {
2416                                         cm_id->add_ref(cm_id);
2417                                 }
2418                         }
2419                 }
2420         } else {
2421                 cm_node->cm_id = NULL;
2422                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2423                         rem_ref_cm_node(cm_core, cm_node);
2424                         rem_ref_cm_node(cm_core, loopback);
2425                 } else {
2426                         event.cm_node = loopback;
2427                         event.cm_info.rem_addr = loopback->rem_addr;
2428                         event.cm_info.loc_addr = loopback->loc_addr;
2429                         event.cm_info.rem_port = loopback->rem_port;
2430                         event.cm_info.loc_port = loopback->loc_port;
2431                         event.cm_info.cm_id = loopback->cm_id;
2432                         cm_event_mpa_reject(&event);
2433                         rem_ref_cm_node(cm_core, cm_node);
2434                         loopback->state = NES_CM_STATE_CLOSING;
2435
2436                         cm_id = loopback->cm_id;
2437                         rem_ref_cm_node(cm_core, loopback);
2438                         cm_id->rem_ref(cm_id);
2439                 }
2440         }
2441
2442         return ret;
2443 }
2444
2445
2446 /**
2447  * mini_cm_close
2448  */
2449 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2450 {
2451         int ret = 0;
2452
2453         if (!cm_core || !cm_node)
2454                 return -EINVAL;
2455
2456         switch (cm_node->state) {
2457         case NES_CM_STATE_SYN_RCVD:
2458         case NES_CM_STATE_SYN_SENT:
2459         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2460         case NES_CM_STATE_ESTABLISHED:
2461         case NES_CM_STATE_ACCEPTING:
2462         case NES_CM_STATE_MPAREQ_SENT:
2463         case NES_CM_STATE_MPAREQ_RCVD:
2464                 cleanup_retrans_entry(cm_node);
2465                 send_reset(cm_node, NULL);
2466                 break;
2467         case NES_CM_STATE_CLOSE_WAIT:
2468                 cm_node->state = NES_CM_STATE_LAST_ACK;
2469                 send_fin(cm_node, NULL);
2470                 break;
2471         case NES_CM_STATE_FIN_WAIT1:
2472         case NES_CM_STATE_FIN_WAIT2:
2473         case NES_CM_STATE_LAST_ACK:
2474         case NES_CM_STATE_TIME_WAIT:
2475         case NES_CM_STATE_CLOSING:
2476                 ret = -1;
2477                 break;
2478         case NES_CM_STATE_LISTENING:
2479                 cleanup_retrans_entry(cm_node);
2480                 send_reset(cm_node, NULL);
2481                 break;
2482         case NES_CM_STATE_MPAREJ_RCVD:
2483         case NES_CM_STATE_UNKNOWN:
2484         case NES_CM_STATE_INITED:
2485         case NES_CM_STATE_CLOSED:
2486         case NES_CM_STATE_LISTENER_DESTROYED:
2487                 ret = rem_ref_cm_node(cm_core, cm_node);
2488                 break;
2489         case NES_CM_STATE_TSA:
2490                 if (cm_node->send_entry)
2491                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2492                                "send_entry=%p\n", cm_node->send_entry);
2493                 ret = rem_ref_cm_node(cm_core, cm_node);
2494                 break;
2495         }
2496         return ret;
2497 }
2498
2499
2500 /**
2501  * recv_pkt - recv an ETHERNET packet, and process it through CM
2502  * node state machine
2503  */
2504 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2505                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2506 {
2507         struct nes_cm_node *cm_node = NULL;
2508         struct nes_cm_listener *listener = NULL;
2509         struct iphdr *iph;
2510         struct tcphdr *tcph;
2511         struct nes_cm_info nfo;
2512         int skb_handled = 1;
2513         __be32 tmp_daddr, tmp_saddr;
2514
2515         if (!skb)
2516                 return 0;
2517         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2518                 return 0;
2519
2520         iph = (struct iphdr *)skb->data;
2521         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2522
2523         nfo.loc_addr = ntohl(iph->daddr);
2524         nfo.loc_port = ntohs(tcph->dest);
2525         nfo.rem_addr = ntohl(iph->saddr);
2526         nfo.rem_port = ntohs(tcph->source);
2527
2528         tmp_daddr = cpu_to_be32(iph->daddr);
2529         tmp_saddr = cpu_to_be32(iph->saddr);
2530
2531         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2532                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2533
2534         do {
2535                 cm_node = find_node(cm_core,
2536                                     nfo.rem_port, nfo.rem_addr,
2537                                     nfo.loc_port, nfo.loc_addr);
2538
2539                 if (!cm_node) {
2540                         /* Only type of packet accepted are for */
2541                         /* the PASSIVE open (syn only) */
2542                         if ((!tcph->syn) || (tcph->ack)) {
2543                                 skb_handled = 0;
2544                                 break;
2545                         }
2546                         listener = find_listener(cm_core, nfo.loc_addr,
2547                                                  nfo.loc_port,
2548                                                  NES_CM_LISTENER_ACTIVE_STATE);
2549                         if (!listener) {
2550                                 nfo.cm_id = NULL;
2551                                 nfo.conn_type = 0;
2552                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2553                                 skb_handled = 0;
2554                                 break;
2555                         }
2556                         nfo.cm_id = listener->cm_id;
2557                         nfo.conn_type = listener->conn_type;
2558                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2559                                                listener);
2560                         if (!cm_node) {
2561                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2562                                           "node\n");
2563                                 cm_packets_dropped++;
2564                                 atomic_dec(&listener->ref_count);
2565                                 dev_kfree_skb_any(skb);
2566                                 break;
2567                         }
2568                         if (!tcph->rst && !tcph->fin) {
2569                                 cm_node->state = NES_CM_STATE_LISTENING;
2570                         } else {
2571                                 cm_packets_dropped++;
2572                                 rem_ref_cm_node(cm_core, cm_node);
2573                                 dev_kfree_skb_any(skb);
2574                                 break;
2575                         }
2576                         add_ref_cm_node(cm_node);
2577                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2578                         if (cm_node->nesqp->pau_mode)
2579                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2580                         else {
2581                                 rem_ref_cm_node(cm_core, cm_node);
2582                                 atomic_inc(&cm_accel_dropped_pkts);
2583                                 dev_kfree_skb_any(skb);
2584                         }
2585                         break;
2586                 }
2587                 skb_reset_network_header(skb);
2588                 skb_set_transport_header(skb, sizeof(*tcph));
2589                 skb->len = ntohs(iph->tot_len);
2590                 process_packet(cm_node, skb, cm_core);
2591                 rem_ref_cm_node(cm_core, cm_node);
2592         } while (0);
2593         return skb_handled;
2594 }
2595
2596
2597 /**
2598  * nes_cm_alloc_core - allocate a top level instance of a cm core
2599  */
2600 static struct nes_cm_core *nes_cm_alloc_core(void)
2601 {
2602         struct nes_cm_core *cm_core;
2603
2604         /* setup the CM core */
2605         /* alloc top level core control structure */
2606         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2607         if (!cm_core)
2608                 return NULL;
2609
2610         INIT_LIST_HEAD(&cm_core->connected_nodes);
2611         init_timer(&cm_core->tcp_timer);
2612         cm_core->tcp_timer.function = nes_cm_timer_tick;
2613
2614         cm_core->mtu = NES_CM_DEFAULT_MTU;
2615         cm_core->state = NES_CM_STATE_INITED;
2616         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2617
2618         atomic_set(&cm_core->events_posted, 0);
2619
2620         cm_core->api = &nes_cm_api;
2621
2622         spin_lock_init(&cm_core->ht_lock);
2623         spin_lock_init(&cm_core->listen_list_lock);
2624
2625         INIT_LIST_HEAD(&cm_core->listen_list.list);
2626
2627         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2628
2629         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2630         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2631         cm_core->post_event = nes_cm_post_event;
2632         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2633         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2634
2635         print_core(cm_core);
2636         return cm_core;
2637 }
2638
2639
2640 /**
2641  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2642  */
2643 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2644 {
2645         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2646
2647         if (!cm_core)
2648                 return -EINVAL;
2649
2650         barrier();
2651
2652         if (timer_pending(&cm_core->tcp_timer))
2653                 del_timer(&cm_core->tcp_timer);
2654
2655         destroy_workqueue(cm_core->event_wq);
2656         destroy_workqueue(cm_core->disconn_wq);
2657         nes_debug(NES_DBG_CM, "\n");
2658         kfree(cm_core);
2659
2660         return 0;
2661 }
2662
2663
2664 /**
2665  * mini_cm_get
2666  */
2667 static int mini_cm_get(struct nes_cm_core *cm_core)
2668 {
2669         return cm_core->state;
2670 }
2671
2672
2673 /**
2674  * mini_cm_set
2675  */
2676 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2677 {
2678         int ret = 0;
2679
2680         switch (type) {
2681         case NES_CM_SET_PKT_SIZE:
2682                 cm_core->mtu = value;
2683                 break;
2684         case NES_CM_SET_FREE_PKT_Q_SIZE:
2685                 cm_core->free_tx_pkt_max = value;
2686                 break;
2687         default:
2688                 /* unknown set option */
2689                 ret = -EINVAL;
2690         }
2691
2692         return ret;
2693 }
2694
2695
2696 /**
2697  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2698  * successfully exchanged when this is called
2699  */
2700 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2701 {
2702         int ret = 0;
2703
2704         if (!nesqp)
2705                 return -EINVAL;
2706
2707         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2708                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2709                                                   NES_QPCONTEXT_MISC_DROS);
2710
2711         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2712                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2713
2714         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2715
2716         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2717
2718         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2719                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2720
2721         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2722                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2723                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2724
2725         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2726                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2727                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2728
2729         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2730         nesqp->nesqp_context->ts_recent = 0;
2731         nesqp->nesqp_context->ts_age = 0;
2732         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2733         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2734         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2735         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2736                                                     cm_node->tcp_cntxt.rcv_wscale);
2737         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2738         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2739         nesqp->nesqp_context->srtt = 0;
2740         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2741         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2742         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2743         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2744         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2745         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2746
2747         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2748                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2749                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2750                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2751                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2752                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2753                   le32_to_cpu(nesqp->nesqp_context->misc));
2754         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2755         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2756         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2757
2758         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2759         cm_node->state = NES_CM_STATE_TSA;
2760
2761         return ret;
2762 }
2763
2764
2765 /**
2766  * nes_cm_disconn
2767  */
2768 int nes_cm_disconn(struct nes_qp *nesqp)
2769 {
2770         struct disconn_work *work;
2771
2772         work = kzalloc(sizeof *work, GFP_ATOMIC);
2773         if (!work)
2774                 return -ENOMEM;  /* Timer will clean up */
2775
2776         nes_add_ref(&nesqp->ibqp);
2777         work->nesqp = nesqp;
2778         INIT_WORK(&work->work, nes_disconnect_worker);
2779         queue_work(g_cm_core->disconn_wq, &work->work);
2780         return 0;
2781 }
2782
2783
2784 /**
2785  * nes_disconnect_worker
2786  */
2787 static void nes_disconnect_worker(struct work_struct *work)
2788 {
2789         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2790         struct nes_qp *nesqp = dwork->nesqp;
2791
2792         kfree(dwork);
2793         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2794                   nesqp->last_aeq, nesqp->hwqp.qp_id);
2795         nes_cm_disconn_true(nesqp);
2796         nes_rem_ref(&nesqp->ibqp);
2797 }
2798
2799
2800 /**
2801  * nes_cm_disconn_true
2802  */
2803 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2804 {
2805         unsigned long flags;
2806         int ret = 0;
2807         struct iw_cm_id *cm_id;
2808         struct iw_cm_event cm_event;
2809         struct nes_vnic *nesvnic;
2810         u16 last_ae;
2811         u8 original_hw_tcp_state;
2812         u8 original_ibqp_state;
2813         int disconn_status = 0;
2814         int issue_disconn = 0;
2815         int issue_close = 0;
2816         int issue_flush = 0;
2817         u32 flush_q = NES_CQP_FLUSH_RQ;
2818         struct ib_event ibevent;
2819
2820         if (!nesqp) {
2821                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2822                 return -1;
2823         }
2824
2825         spin_lock_irqsave(&nesqp->lock, flags);
2826         cm_id = nesqp->cm_id;
2827         /* make sure we havent already closed this connection */
2828         if (!cm_id) {
2829                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2830                           nesqp->hwqp.qp_id);
2831                 spin_unlock_irqrestore(&nesqp->lock, flags);
2832                 return -1;
2833         }
2834
2835         nesvnic = to_nesvnic(nesqp->ibqp.device);
2836         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2837
2838         original_hw_tcp_state = nesqp->hw_tcp_state;
2839         original_ibqp_state = nesqp->ibqp_state;
2840         last_ae = nesqp->last_aeq;
2841
2842         if (nesqp->term_flags) {
2843                 issue_disconn = 1;
2844                 issue_close = 1;
2845                 nesqp->cm_id = NULL;
2846                 del_timer(&nesqp->terminate_timer);
2847                 if (nesqp->flush_issued == 0) {
2848                         nesqp->flush_issued = 1;
2849                         issue_flush = 1;
2850                 }
2851         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2852                         ((original_ibqp_state == IB_QPS_RTS) &&
2853                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2854                 issue_disconn = 1;
2855                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2856                         disconn_status = -ECONNRESET;
2857         }
2858
2859         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2860                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2861                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2862                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2863                 issue_close = 1;
2864                 nesqp->cm_id = NULL;
2865                 if (nesqp->flush_issued == 0) {
2866                         nesqp->flush_issued = 1;
2867                         issue_flush = 1;
2868                 }
2869         }
2870
2871         spin_unlock_irqrestore(&nesqp->lock, flags);
2872
2873         if ((issue_flush) && (nesqp->destroyed == 0)) {
2874                 /* Flush the queue(s) */
2875                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2876                         flush_q |= NES_CQP_FLUSH_SQ;
2877                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2878
2879                 if (nesqp->term_flags) {
2880                         ibevent.device = nesqp->ibqp.device;
2881                         ibevent.event = nesqp->terminate_eventtype;
2882                         ibevent.element.qp = &nesqp->ibqp;
2883                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2884                 }
2885         }
2886
2887         if ((cm_id) && (cm_id->event_handler)) {
2888                 if (issue_disconn) {
2889                         atomic_inc(&cm_disconnects);
2890                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2891                         cm_event.status = disconn_status;
2892                         cm_event.local_addr = cm_id->local_addr;
2893                         cm_event.remote_addr = cm_id->remote_addr;
2894                         cm_event.private_data = NULL;
2895                         cm_event.private_data_len = 0;
2896
2897                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2898                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2899                                   "cm_id = %p, refcount = %u.\n",
2900                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2901                                   nesqp->hwqp.sq_tail, cm_id,
2902                                   atomic_read(&nesqp->refcount));
2903
2904                         ret = cm_id->event_handler(cm_id, &cm_event);
2905                         if (ret)
2906                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2907                                           "returned, ret=%d\n", ret);
2908                 }
2909
2910                 if (issue_close) {
2911                         atomic_inc(&cm_closes);
2912                         nes_disconnect(nesqp, 1);
2913
2914                         cm_id->provider_data = nesqp;
2915                         /* Send up the close complete event */
2916                         cm_event.event = IW_CM_EVENT_CLOSE;
2917                         cm_event.status = 0;
2918                         cm_event.provider_data = cm_id->provider_data;
2919                         cm_event.local_addr = cm_id->local_addr;
2920                         cm_event.remote_addr = cm_id->remote_addr;
2921                         cm_event.private_data = NULL;
2922                         cm_event.private_data_len = 0;
2923
2924                         ret = cm_id->event_handler(cm_id, &cm_event);
2925                         if (ret)
2926                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2927
2928                         cm_id->rem_ref(cm_id);
2929                 }
2930         }
2931
2932         return 0;
2933 }
2934
2935
2936 /**
2937  * nes_disconnect
2938  */
2939 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2940 {
2941         int ret = 0;
2942         struct nes_vnic *nesvnic;
2943         struct nes_device *nesdev;
2944         struct nes_ib_device *nesibdev;
2945
2946         nesvnic = to_nesvnic(nesqp->ibqp.device);
2947         if (!nesvnic)
2948                 return -EINVAL;
2949
2950         nesdev = nesvnic->nesdev;
2951         nesibdev = nesvnic->nesibdev;
2952
2953         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2954                         netdev_refcnt_read(nesvnic->netdev));
2955
2956         if (nesqp->active_conn) {
2957
2958                 /* indicate this connection is NOT active */
2959                 nesqp->active_conn = 0;
2960         } else {
2961                 /* Need to free the Last Streaming Mode Message */
2962                 if (nesqp->ietf_frame) {
2963                         if (nesqp->lsmm_mr)
2964                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2965                         pci_free_consistent(nesdev->pcidev,
2966                                             nesqp->private_data_len + nesqp->ietf_frame_size,
2967                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2968                 }
2969         }
2970
2971         /* close the CM node down if it is still active */
2972         if (nesqp->cm_node) {
2973                 nes_debug(NES_DBG_CM, "Call close API\n");
2974
2975                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2976         }
2977
2978         return ret;
2979 }
2980
2981
2982 /**
2983  * nes_accept
2984  */
2985 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2986 {
2987         u64 u64temp;
2988         struct ib_qp *ibqp;
2989         struct nes_qp *nesqp;
2990         struct nes_vnic *nesvnic;
2991         struct nes_device *nesdev;
2992         struct nes_cm_node *cm_node;
2993         struct nes_adapter *adapter;
2994         struct ib_qp_attr attr;
2995         struct iw_cm_event cm_event;
2996         struct nes_hw_qp_wqe *wqe;
2997         struct nes_v4_quad nes_quad;
2998         u32 crc_value;
2999         int ret;
3000         int passive_state;
3001         struct nes_ib_device *nesibdev;
3002         struct ib_mr *ibmr = NULL;
3003         struct ib_phys_buf ibphysbuf;
3004         struct nes_pd *nespd;
3005         u64 tagged_offset;
3006         u8 mpa_frame_offset = 0;
3007         struct ietf_mpa_v2 *mpa_v2_frame;
3008         u8 start_addr = 0;
3009         u8 *start_ptr = &start_addr;
3010         u8 **start_buff = &start_ptr;
3011         u16 buff_len = 0;
3012
3013         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3014         if (!ibqp)
3015                 return -EINVAL;
3016
3017         /* get all our handles */
3018         nesqp = to_nesqp(ibqp);
3019         nesvnic = to_nesvnic(nesqp->ibqp.device);
3020         nesdev = nesvnic->nesdev;
3021         adapter = nesdev->nesadapter;
3022
3023         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3024         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3025                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3026                 nesvnic->netdev->name);
3027
3028         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3029                 if (cm_node->loopbackpartner)
3030                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3031                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3032                 return -EINVAL;
3033         }
3034
3035         passive_state = atomic_add_return(1, &cm_node->passive_state);
3036         if (passive_state == NES_SEND_RESET_EVENT) {
3037                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3038                 return -ECONNRESET;
3039         }
3040
3041         /* associate the node with the QP */
3042         nesqp->cm_node = (void *)cm_node;
3043         cm_node->nesqp = nesqp;
3044
3045         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3046                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3047         atomic_inc(&cm_accepts);
3048
3049         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3050                         netdev_refcnt_read(nesvnic->netdev));
3051
3052         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3053         /* allocate the ietf frame and space for private data */
3054         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3055                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3056                                                  &nesqp->ietf_frame_pbase);
3057
3058         if (!nesqp->ietf_frame) {
3059                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3060                 return -ENOMEM;
3061         }
3062         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3063
3064         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3065                 mpa_frame_offset = 4;
3066
3067         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3068                conn_param->private_data_len);
3069
3070         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3071         nesqp->private_data_len = conn_param->private_data_len;
3072
3073         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3074         wqe = &nesqp->hwqp.sq_vbase[0];
3075
3076         if (cm_id->remote_addr.sin_addr.s_addr !=
3077             cm_id->local_addr.sin_addr.s_addr) {
3078                 u64temp = (unsigned long)nesqp;
3079                 nesibdev = nesvnic->nesibdev;
3080                 nespd = nesqp->nespd;
3081                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3082                 ibphysbuf.size = buff_len;
3083                 tagged_offset = (u64)(unsigned long)*start_buff;
3084                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3085                                                    &ibphysbuf, 1,
3086                                                    IB_ACCESS_LOCAL_WRITE,
3087                                                    &tagged_offset);
3088                 if (!ibmr) {
3089                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3090                                   "for lSMM for cm_node = %p \n",
3091                                   cm_node);
3092                         pci_free_consistent(nesdev->pcidev,
3093                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3094                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3095                         return -ENOMEM;
3096                 }
3097
3098                 ibmr->pd = &nespd->ibpd;
3099                 ibmr->device = nespd->ibpd.device;
3100                 nesqp->lsmm_mr = ibmr;
3101
3102                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3103                 set_wqe_64bit_value(wqe->wqe_words,
3104                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3105                                     u64temp);
3106                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3107                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3108                                     NES_IWARP_SQ_WQE_WRPDU);
3109                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3110                         cpu_to_le32(buff_len);
3111                 set_wqe_64bit_value(wqe->wqe_words,
3112                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3113                                     (u64)(unsigned long)(*start_buff));
3114                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3115                         cpu_to_le32(buff_len);
3116                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3117                 if (nesqp->sq_kmapped) {
3118                         nesqp->sq_kmapped = 0;
3119                         kunmap(nesqp->page);
3120                 }
3121
3122                 nesqp->nesqp_context->ird_ord_sizes |=
3123                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3124                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3125         } else {
3126                 nesqp->nesqp_context->ird_ord_sizes |=
3127                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3128         }
3129         nesqp->skip_lsmm = 1;
3130
3131
3132         /* Cache the cm_id in the qp */
3133         nesqp->cm_id = cm_id;
3134         cm_node->cm_id = cm_id;
3135
3136         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3137         cm_id->provider_data = nesqp;
3138         nesqp->active_conn = 0;
3139
3140         if (cm_node->state == NES_CM_STATE_TSA)
3141                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3142                           cm_node);
3143
3144         nes_cm_init_tsa_conn(nesqp, cm_node);
3145
3146         nesqp->nesqp_context->tcpPorts[0] =
3147                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3148         nesqp->nesqp_context->tcpPorts[1] =
3149                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3150
3151         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3152                 nesqp->nesqp_context->ip0 =
3153                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3154         else
3155                 nesqp->nesqp_context->ip0 =
3156                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3157
3158         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3159                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3160                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3161
3162         nesqp->nesqp_context->arp_index_vlan |=
3163                 cpu_to_le32(nes_arp_table(nesdev,
3164                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3165                                           NES_ARP_RESOLVE) << 16);
3166
3167         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3168                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3169
3170         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3171
3172         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3173                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3174         nesqp->nesqp_context->ird_ord_sizes |=
3175                 cpu_to_le32((u32)conn_param->ord);
3176
3177         memset(&nes_quad, 0, sizeof(nes_quad));
3178         nes_quad.DstIpAdrIndex =
3179                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3180         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3181                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3182         else
3183                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3184         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3185         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3186
3187         /* Produce hash key */
3188         crc_value = get_crc_value(&nes_quad);
3189         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3190         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3191                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3192
3193         nesqp->hte_index &= adapter->hte_index_mask;
3194         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3195
3196         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3197
3198         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3199                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3200                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3201                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3202                   ntohs(cm_id->remote_addr.sin_port),
3203                   ntohl(cm_id->local_addr.sin_addr.s_addr),
3204                   ntohs(cm_id->local_addr.sin_port),
3205                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3206                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3207                   buff_len);
3208
3209         /* notify OF layer that accept event was successful */
3210         cm_id->add_ref(cm_id);
3211         nes_add_ref(&nesqp->ibqp);
3212
3213         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3214         cm_event.status = 0;
3215         cm_event.provider_data = (void *)nesqp;
3216         cm_event.local_addr = cm_id->local_addr;
3217         cm_event.remote_addr = cm_id->remote_addr;
3218         cm_event.private_data = NULL;
3219         cm_event.private_data_len = 0;
3220         ret = cm_id->event_handler(cm_id, &cm_event);
3221         attr.qp_state = IB_QPS_RTS;
3222         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3223         if (cm_node->loopbackpartner) {
3224                 cm_node->loopbackpartner->mpa_frame_size =
3225                         nesqp->private_data_len;
3226                 /* copy entire MPA frame to our cm_node's frame */
3227                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3228                        conn_param->private_data, conn_param->private_data_len);
3229                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3230         }
3231         if (ret)
3232                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3233                        "ret=%d\n", __func__, __LINE__, ret);
3234
3235         return 0;
3236 }
3237
3238
3239 /**
3240  * nes_reject
3241  */
3242 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3243 {
3244         struct nes_cm_node *cm_node;
3245         struct nes_cm_node *loopback;
3246         struct nes_cm_core *cm_core;
3247         u8 *start_buff;
3248
3249         atomic_inc(&cm_rejects);
3250         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3251         loopback = cm_node->loopbackpartner;
3252         cm_core = cm_node->cm_core;
3253         cm_node->cm_id = cm_id;
3254
3255         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3256                 return -EINVAL;
3257
3258         if (loopback) {
3259                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3260                 loopback->mpa_frame.priv_data_len = pdata_len;
3261                 loopback->mpa_frame_size = pdata_len;
3262         } else {
3263                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3264                 cm_node->mpa_frame_size = pdata_len;
3265                 memcpy(start_buff, pdata, pdata_len);
3266         }
3267         return cm_core->api->reject(cm_core, cm_node);
3268 }
3269
3270
3271 /**
3272  * nes_connect
3273  * setup and launch cm connect node
3274  */
3275 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3276 {
3277         struct ib_qp *ibqp;
3278         struct nes_qp *nesqp;
3279         struct nes_vnic *nesvnic;
3280         struct nes_device *nesdev;
3281         struct nes_cm_node *cm_node;
3282         struct nes_cm_info cm_info;
3283         int apbvt_set = 0;
3284
3285         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3286         if (!ibqp)
3287                 return -EINVAL;
3288         nesqp = to_nesqp(ibqp);
3289         if (!nesqp)
3290                 return -EINVAL;
3291         nesvnic = to_nesvnic(nesqp->ibqp.device);
3292         if (!nesvnic)
3293                 return -EINVAL;
3294         nesdev = nesvnic->nesdev;
3295         if (!nesdev)
3296                 return -EINVAL;
3297
3298         if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3299                 return -EINVAL;
3300
3301         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3302                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3303                   ntohl(nesvnic->local_ipaddr),
3304                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3305                   ntohs(cm_id->remote_addr.sin_port),
3306                   ntohl(cm_id->local_addr.sin_addr.s_addr),
3307                   ntohs(cm_id->local_addr.sin_port));
3308
3309         atomic_inc(&cm_connects);
3310         nesqp->active_conn = 1;
3311
3312         /* cache the cm_id in the qp */
3313         nesqp->cm_id = cm_id;
3314
3315         cm_id->provider_data = nesqp;
3316
3317         nesqp->private_data_len = conn_param->private_data_len;
3318         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3319         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3320         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3321                   conn_param->private_data_len);
3322
3323         if (cm_id->local_addr.sin_addr.s_addr !=
3324             cm_id->remote_addr.sin_addr.s_addr) {
3325                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3326                                  PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3327                 apbvt_set = 1;
3328         }
3329
3330         /* set up the connection params for the node */
3331         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3332         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3333         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3334         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3335         cm_info.cm_id = cm_id;
3336         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3337
3338         cm_id->add_ref(cm_id);
3339
3340         /* create a connect CM node connection */
3341         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3342                                           conn_param->private_data_len, (void *)conn_param->private_data,
3343                                           &cm_info);
3344         if (!cm_node) {
3345                 if (apbvt_set)
3346                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3347                                          PCI_FUNC(nesdev->pcidev->devfn),
3348                                          NES_MANAGE_APBVT_DEL);
3349
3350                 cm_id->rem_ref(cm_id);
3351                 return -ENOMEM;
3352         }
3353
3354         cm_node->apbvt_set = apbvt_set;
3355         nesqp->cm_node = cm_node;
3356         cm_node->nesqp = nesqp;
3357         nes_add_ref(&nesqp->ibqp);
3358
3359         return 0;
3360 }
3361
3362
3363 /**
3364  * nes_create_listen
3365  */
3366 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3367 {
3368         struct nes_vnic *nesvnic;
3369         struct nes_cm_listener *cm_node;
3370         struct nes_cm_info cm_info;
3371         int err;
3372
3373         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3374                         cm_id, ntohs(cm_id->local_addr.sin_port));
3375
3376         nesvnic = to_nesvnic(cm_id->device);
3377         if (!nesvnic)
3378                 return -EINVAL;
3379
3380         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3381                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3382
3383         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3384                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3385
3386         /* setup listen params in our api call struct */
3387         cm_info.loc_addr = nesvnic->local_ipaddr;
3388         cm_info.loc_port = cm_id->local_addr.sin_port;
3389         cm_info.backlog = backlog;
3390         cm_info.cm_id = cm_id;
3391
3392         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3393
3394
3395         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3396         if (!cm_node) {
3397                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3398                        __func__, __LINE__);
3399                 return -ENOMEM;
3400         }
3401
3402         cm_id->provider_data = cm_node;
3403
3404         if (!cm_node->reused_node) {
3405                 err = nes_manage_apbvt(nesvnic,
3406                                        ntohs(cm_id->local_addr.sin_port),
3407                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3408                                        NES_MANAGE_APBVT_ADD);
3409                 if (err) {
3410                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3411                                err);
3412                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3413                         return err;
3414                 }
3415                 atomic_inc(&cm_listens_created);
3416         }
3417
3418         cm_id->add_ref(cm_id);
3419         cm_id->provider_data = (void *)cm_node;
3420
3421
3422         return 0;
3423 }
3424
3425
3426 /**
3427  * nes_destroy_listen
3428  */
3429 int nes_destroy_listen(struct iw_cm_id *cm_id)
3430 {
3431         if (cm_id->provider_data)
3432                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3433         else
3434                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3435
3436         cm_id->rem_ref(cm_id);
3437
3438         return 0;
3439 }
3440
3441
3442 /**
3443  * nes_cm_recv
3444  */
3445 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3446 {
3447         int rc = 0;
3448
3449         cm_packets_received++;
3450         if ((g_cm_core) && (g_cm_core->api))
3451                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3452         else
3453                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3454                           " cm is not setup properly.\n");
3455
3456         return rc;
3457 }
3458
3459
3460 /**
3461  * nes_cm_start
3462  * Start and init a cm core module
3463  */
3464 int nes_cm_start(void)
3465 {
3466         nes_debug(NES_DBG_CM, "\n");
3467         /* create the primary CM core, pass this handle to subsequent core inits */
3468         g_cm_core = nes_cm_alloc_core();
3469         if (g_cm_core)
3470                 return 0;
3471         else
3472                 return -ENOMEM;
3473 }
3474
3475
3476 /**
3477  * nes_cm_stop
3478  * stop and dealloc all cm core instances
3479  */
3480 int nes_cm_stop(void)
3481 {
3482         g_cm_core->api->destroy_cm_core(g_cm_core);
3483         return 0;
3484 }
3485
3486
3487 /**
3488  * cm_event_connected
3489  * handle a connected event, setup QPs and HW
3490  */
3491 static void cm_event_connected(struct nes_cm_event *event)
3492 {
3493         struct nes_qp *nesqp;
3494         struct nes_vnic *nesvnic;
3495         struct nes_device *nesdev;
3496         struct nes_cm_node *cm_node;
3497         struct nes_adapter *nesadapter;
3498         struct ib_qp_attr attr;
3499         struct iw_cm_id *cm_id;
3500         struct iw_cm_event cm_event;
3501         struct nes_v4_quad nes_quad;
3502         u32 crc_value;
3503         int ret;
3504
3505         /* get all our handles */
3506         cm_node = event->cm_node;
3507         cm_id = cm_node->cm_id;
3508         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3509         nesqp = (struct nes_qp *)cm_id->provider_data;
3510         nesvnic = to_nesvnic(nesqp->ibqp.device);
3511         nesdev = nesvnic->nesdev;
3512         nesadapter = nesdev->nesadapter;
3513
3514         if (nesqp->destroyed)
3515                 return;
3516         atomic_inc(&cm_connecteds);
3517         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3518                   " local port 0x%04X. jiffies = %lu.\n",
3519                   nesqp->hwqp.qp_id,
3520                   ntohl(cm_id->remote_addr.sin_addr.s_addr),
3521                   ntohs(cm_id->remote_addr.sin_port),
3522                   ntohs(cm_id->local_addr.sin_port),
3523                   jiffies);
3524
3525         nes_cm_init_tsa_conn(nesqp, cm_node);
3526
3527         /* set the QP tsa context */
3528         nesqp->nesqp_context->tcpPorts[0] =
3529                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3530         nesqp->nesqp_context->tcpPorts[1] =
3531                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3532         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3533                 nesqp->nesqp_context->ip0 =
3534                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3535         else
3536                 nesqp->nesqp_context->ip0 =
3537                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3538
3539         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3540                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3541                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3542         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3543                         nes_arp_table(nesdev,
3544                         le32_to_cpu(nesqp->nesqp_context->ip0),
3545                         NULL, NES_ARP_RESOLVE) << 16);
3546         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3547                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3548         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3549         nesqp->nesqp_context->ird_ord_sizes |=
3550                         cpu_to_le32((u32)1 <<
3551                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3552
3553         /* Adjust tail for not having a LSMM */
3554         /*nesqp->hwqp.sq_tail = 1;*/
3555
3556         build_rdma0_msg(cm_node, &nesqp);
3557
3558         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3559                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3560
3561         memset(&nes_quad, 0, sizeof(nes_quad));
3562
3563         nes_quad.DstIpAdrIndex =
3564                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3565         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3566                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3567         else
3568                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3569         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3570         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3571
3572         /* Produce hash key */
3573         crc_value = get_crc_value(&nes_quad);
3574         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3575         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3576                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3577
3578         nesqp->hte_index &= nesadapter->hte_index_mask;
3579         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3580
3581         nesqp->ietf_frame = &cm_node->mpa_frame;
3582         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3583         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3584
3585         /* notify OF layer we successfully created the requested connection */
3586         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3587         cm_event.status = 0;
3588         cm_event.provider_data = cm_id->provider_data;
3589         cm_event.local_addr.sin_family = AF_INET;
3590         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3591         cm_event.remote_addr = cm_id->remote_addr;
3592
3593         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3594         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3595         cm_event.ird = cm_node->ird_size;
3596         cm_event.ord = cm_node->ord_size;
3597
3598         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3599         ret = cm_id->event_handler(cm_id, &cm_event);
3600         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3601
3602         if (ret)
3603                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3604                        "ret=%d\n", __func__, __LINE__, ret);
3605         attr.qp_state = IB_QPS_RTS;
3606         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3607
3608         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3609                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3610
3611         return;
3612 }
3613
3614
3615 /**
3616  * cm_event_connect_error
3617  */
3618 static void cm_event_connect_error(struct nes_cm_event *event)
3619 {
3620         struct nes_qp *nesqp;
3621         struct iw_cm_id *cm_id;
3622         struct iw_cm_event cm_event;
3623         /* struct nes_cm_info cm_info; */
3624         int ret;
3625
3626         if (!event->cm_node)
3627                 return;
3628
3629         cm_id = event->cm_node->cm_id;
3630         if (!cm_id)
3631                 return;
3632
3633         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3634         nesqp = cm_id->provider_data;
3635
3636         if (!nesqp)
3637                 return;
3638
3639         /* notify OF layer about this connection error event */
3640         /* cm_id->rem_ref(cm_id); */
3641         nesqp->cm_id = NULL;
3642         cm_id->provider_data = NULL;
3643         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3644         cm_event.status = -ECONNRESET;
3645         cm_event.provider_data = cm_id->provider_data;
3646         cm_event.local_addr = cm_id->local_addr;
3647         cm_event.remote_addr = cm_id->remote_addr;
3648         cm_event.private_data = NULL;
3649         cm_event.private_data_len = 0;
3650
3651         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3652                   "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3653                   cm_event.remote_addr.sin_addr.s_addr);
3654
3655         ret = cm_id->event_handler(cm_id, &cm_event);
3656         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3657         if (ret)
3658                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3659                        "ret=%d\n", __func__, __LINE__, ret);
3660         cm_id->rem_ref(cm_id);
3661
3662         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3663         return;
3664 }
3665
3666
3667 /**
3668  * cm_event_reset
3669  */
3670 static void cm_event_reset(struct nes_cm_event *event)
3671 {
3672         struct nes_qp *nesqp;
3673         struct iw_cm_id *cm_id;
3674         struct iw_cm_event cm_event;
3675         /* struct nes_cm_info cm_info; */
3676         int ret;
3677
3678         if (!event->cm_node)
3679                 return;
3680
3681         if (!event->cm_node->cm_id)
3682                 return;
3683
3684         cm_id = event->cm_node->cm_id;
3685
3686         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3687         nesqp = cm_id->provider_data;
3688         if (!nesqp)
3689                 return;
3690
3691         nesqp->cm_id = NULL;
3692         /* cm_id->provider_data = NULL; */
3693         cm_event.event = IW_CM_EVENT_DISCONNECT;
3694         cm_event.status = -ECONNRESET;
3695         cm_event.provider_data = cm_id->provider_data;
3696         cm_event.local_addr = cm_id->local_addr;
3697         cm_event.remote_addr = cm_id->remote_addr;
3698         cm_event.private_data = NULL;
3699         cm_event.private_data_len = 0;
3700
3701         cm_id->add_ref(cm_id);
3702         ret = cm_id->event_handler(cm_id, &cm_event);
3703         atomic_inc(&cm_closes);
3704         cm_event.event = IW_CM_EVENT_CLOSE;
3705         cm_event.status = 0;
3706         cm_event.provider_data = cm_id->provider_data;
3707         cm_event.local_addr = cm_id->local_addr;
3708         cm_event.remote_addr = cm_id->remote_addr;
3709         cm_event.private_data = NULL;
3710         cm_event.private_data_len = 0;
3711         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3712         ret = cm_id->event_handler(cm_id, &cm_event);
3713
3714         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3715
3716
3717         /* notify OF layer about this connection error event */
3718         cm_id->rem_ref(cm_id);
3719
3720         return;
3721 }
3722
3723
3724 /**
3725  * cm_event_mpa_req
3726  */
3727 static void cm_event_mpa_req(struct nes_cm_event *event)
3728 {
3729         struct iw_cm_id *cm_id;
3730         struct iw_cm_event cm_event;
3731         int ret;
3732         struct nes_cm_node *cm_node;
3733
3734         cm_node = event->cm_node;
3735         if (!cm_node)
3736                 return;
3737         cm_id = cm_node->cm_id;
3738
3739         atomic_inc(&cm_connect_reqs);
3740         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3741                   cm_node, cm_id, jiffies);
3742
3743         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3744         cm_event.status = 0;
3745         cm_event.provider_data = (void *)cm_node;
3746
3747         cm_event.local_addr.sin_family = AF_INET;
3748         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3749         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3750
3751         cm_event.remote_addr.sin_family = AF_INET;
3752         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3753         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3754         cm_event.private_data = cm_node->mpa_frame_buf;
3755         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3756         cm_event.ird = cm_node->ird_size;
3757         cm_event.ord = cm_node->ord_size;
3758
3759         ret = cm_id->event_handler(cm_id, &cm_event);
3760         if (ret)
3761                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3762                        __func__, __LINE__, ret);
3763         return;
3764 }
3765
3766
3767 static void cm_event_mpa_reject(struct nes_cm_event *event)
3768 {
3769         struct iw_cm_id *cm_id;
3770         struct iw_cm_event cm_event;
3771         struct nes_cm_node *cm_node;
3772         int ret;
3773
3774         cm_node = event->cm_node;
3775         if (!cm_node)
3776                 return;
3777         cm_id = cm_node->cm_id;
3778
3779         atomic_inc(&cm_connect_reqs);
3780         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3781                   cm_node, cm_id, jiffies);
3782
3783         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3784         cm_event.status = -ECONNREFUSED;
3785         cm_event.provider_data = cm_id->provider_data;
3786
3787         cm_event.local_addr.sin_family = AF_INET;
3788         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3789         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3790
3791         cm_event.remote_addr.sin_family = AF_INET;
3792         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3793         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3794
3795         cm_event.private_data = cm_node->mpa_frame_buf;
3796         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3797
3798         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3799                   "remove_addr=%08x\n",
3800                   cm_event.local_addr.sin_addr.s_addr,
3801                   cm_event.remote_addr.sin_addr.s_addr);
3802
3803         ret = cm_id->event_handler(cm_id, &cm_event);
3804         if (ret)
3805                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3806                        __func__, __LINE__, ret);
3807
3808         return;
3809 }
3810
3811
3812 static void nes_cm_event_handler(struct work_struct *);
3813
3814 /**
3815  * nes_cm_post_event
3816  * post an event to the cm event handler
3817  */
3818 static int nes_cm_post_event(struct nes_cm_event *event)
3819 {
3820         atomic_inc(&event->cm_node->cm_core->events_posted);
3821         add_ref_cm_node(event->cm_node);
3822         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3823         INIT_WORK(&event->event_work, nes_cm_event_handler);
3824         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3825                   event->cm_node, event);
3826
3827         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3828
3829         nes_debug(NES_DBG_CM, "Exit\n");
3830         return 0;
3831 }
3832
3833
3834 /**
3835  * nes_cm_event_handler
3836  * worker function to handle cm events
3837  * will free instance of nes_cm_event
3838  */
3839 static void nes_cm_event_handler(struct work_struct *work)
3840 {
3841         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3842                                                   event_work);
3843         struct nes_cm_core *cm_core;
3844
3845         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3846                 return;
3847
3848         cm_core = event->cm_node->cm_core;
3849         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3850                   event, event->type, atomic_read(&cm_core->events_posted));
3851
3852         switch (event->type) {
3853         case NES_CM_EVENT_MPA_REQ:
3854                 cm_event_mpa_req(event);
3855                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3856                           event->cm_node);
3857                 break;
3858         case NES_CM_EVENT_RESET:
3859                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3860                           event->cm_node);
3861                 cm_event_reset(event);
3862                 break;
3863         case NES_CM_EVENT_CONNECTED:
3864                 if ((!event->cm_node->cm_id) ||
3865                     (event->cm_node->state != NES_CM_STATE_TSA))
3866                         break;
3867                 cm_event_connected(event);
3868                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3869                 break;
3870         case NES_CM_EVENT_MPA_REJECT:
3871                 if ((!event->cm_node->cm_id) ||
3872                     (event->cm_node->state == NES_CM_STATE_TSA))
3873                         break;
3874                 cm_event_mpa_reject(event);
3875                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3876                 break;
3877
3878         case NES_CM_EVENT_ABORTED:
3879                 if ((!event->cm_node->cm_id) ||
3880                     (event->cm_node->state == NES_CM_STATE_TSA))
3881                         break;
3882                 cm_event_connect_error(event);
3883                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3884                 break;
3885         case NES_CM_EVENT_DROPPED_PKT:
3886                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3887                 break;
3888         default:
3889                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3890                 break;
3891         }
3892
3893         atomic_dec(&cm_core->events_posted);
3894         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3895         rem_ref_cm_node(cm_core, event->cm_node);
3896         kfree(event);
3897
3898         return;
3899 }