Pileus Git - ~andy/linux/blob - 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         if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
 434                 skb->ip_summed = CHECKSUM_NONE;
 435         skb->protocol = htons(0x800);
 436         skb->data_len = 0;
 437         skb->mac_len = ETH_HLEN;
 438
 439         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 440         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 441         ethh->h_proto = htons(0x0800);
 442
 443         iph->version = IPVERSION;
 444         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 445         iph->tos = 0;
 446         iph->tot_len = htons(packetsize);
 447         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 448
 449         iph->frag_off = htons(0x4000);
 450         iph->ttl = 0x40;
 451         iph->protocol = 0x06;   /* IPPROTO_TCP */
 452
 453         iph->saddr = htonl(cm_node->loc_addr);
 454         iph->daddr = htonl(cm_node->rem_addr);
 455
 456         tcph->source = htons(cm_node->loc_port);
 457         tcph->dest = htons(cm_node->rem_port);
 458         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 459
 460         if (flags & SET_ACK) {
 461                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 462                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 463                 tcph->ack = 1;
 464         } else {
 465                 tcph->ack_seq = 0;
 466         }
 467
 468         if (flags & SET_SYN) {
 469                 cm_node->tcp_cntxt.loc_seq_num++;
 470                 tcph->syn = 1;
 471         } else {
 472                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 473         }
 474
 475         if (flags & SET_FIN) {
 476                 cm_node->tcp_cntxt.loc_seq_num++;
 477                 tcph->fin = 1;
 478         }
 479
 480         if (flags & SET_RST)
 481                 tcph->rst = 1;
 482
 483         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 484         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 485         tcph->urg_ptr = 0;
 486         if (optionsize)
 487                 memcpy(buf, options, optionsize);
 488         buf += optionsize;
 489         if (datasize)
 490                 memcpy(buf, data, datasize);
 491
 492         skb_shinfo(skb)->nr_frags = 0;
 493         cm_packets_created++;
 494 }
 495
 496 /**
 497  * print_core - dump a cm core
 498  */
 499 static void print_core(struct nes_cm_core *core)
 500 {
 501         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 502         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 503         if (!core)
 504                 return;
 505         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 506
 507         nes_debug(NES_DBG_CM, "State         : %u \n", core->state);
 508
 509         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 510         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 511
 512         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 513
 514         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 515 }
 516
 517 /**
 518  * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
 519  */
 520 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
 521                               u16 *buff_len, u8 *pci_mem, u8 mpa_key)
 522 {
 523         int ret = 0;
 524
 525         *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
 526
 527         switch (cm_node->mpa_frame_rev) {
 528         case IETF_MPA_V1:
 529                 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
 530                 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
 531                 build_mpa_v1(cm_node, *start_buff, mpa_key);
 532                 break;
 533         case IETF_MPA_V2:
 534                 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
 535                 build_mpa_v2(cm_node, *start_buff, mpa_key);
 536                 break;
 537         default:
 538                 ret = -EINVAL;
 539         }
 540         return ret;
 541 }
 542
 543 /**
 544  * build_mpa_v2 - build a MPA V2 frame
 545  */
 546 static void build_mpa_v2(struct nes_cm_node *cm_node,
 547                          void *start_addr, u8 mpa_key)
 548 {
 549         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 550         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 551         u16 ctrl_ird;
 552         u16 ctrl_ord;
 553
 554         /* initialize the upper 5 bytes of the frame */
 555         build_mpa_v1(cm_node, start_addr, mpa_key);
 556         mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
 557         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 558
 559         /* initialize RTR msg */
 560         ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
 561                             IETF_NO_IRD_ORD : cm_node->ird_size;
 562         ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
 563                             IETF_NO_IRD_ORD : cm_node->ord_size;
 564
 565         ctrl_ird |= IETF_PEER_TO_PEER;
 566         ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 567
 568         switch (mpa_key) {
 569         case MPA_KEY_REQUEST:
 570                 ctrl_ord |= IETF_RDMA0_WRITE;
 571                 ctrl_ord |= IETF_RDMA0_READ;
 572                 break;
 573         case MPA_KEY_REPLY:
 574                 switch (cm_node->send_rdma0_op) {
 575                 case SEND_RDMA_WRITE_ZERO:
 576                         ctrl_ord |= IETF_RDMA0_WRITE;
 577                         break;
 578                 case SEND_RDMA_READ_ZERO:
 579                         ctrl_ord |= IETF_RDMA0_READ;
 580                         break;
 581                 }
 582         }
 583         rtr_msg->ctrl_ird = htons(ctrl_ird);
 584         rtr_msg->ctrl_ord = htons(ctrl_ord);
 585 }
 586
 587 /**
 588  * build_mpa_v1 - build a MPA V1 frame
 589  */
 590 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
 591 {
 592         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 593
 594         switch (mpa_key) {
 595         case MPA_KEY_REQUEST:
 596                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 597                 break;
 598         case MPA_KEY_REPLY:
 599                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 600                 break;
 601         }
 602         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 603         mpa_frame->rev = cm_node->mpa_frame_rev;
 604         mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
 605 }
 606
 607 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
 608 {
 609         u64 u64temp;
 610         struct nes_qp *nesqp = *nesqp_addr;
 611         struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
 612
 613         u64temp = (unsigned long)nesqp;
 614         u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
 615         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
 616
 617         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
 618         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
 619
 620         switch (cm_node->send_rdma0_op) {
 621         case SEND_RDMA_WRITE_ZERO:
 622                 nes_debug(NES_DBG_CM, "Sending first write.\n");
 623                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
 624                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
 625                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
 626                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
 627                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
 628                 break;
 629
 630         case SEND_RDMA_READ_ZERO:
 631         default:
 632                 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
 633                         WARN(1, "Unsupported RDMA0 len operation=%u\n",
 634                              cm_node->send_rdma0_op);
 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
 673         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 674         if (!new_send)
 675                 return -ENOMEM;
 676
 677         /* new_send->timetosend = currenttime */
 678         new_send->retrycount = NES_DEFAULT_RETRYS;
 679         new_send->retranscount = NES_DEFAULT_RETRANS;
 680         new_send->skb = skb;
 681         new_send->timetosend = jiffies;
 682         new_send->type = type;
 683         new_send->netdev = cm_node->netdev;
 684         new_send->send_retrans = send_retrans;
 685         new_send->close_when_complete = close_when_complete;
 686
 687         if (type == NES_TIMER_TYPE_CLOSE) {
 688                 new_send->timetosend += (HZ / 10);
 689                 if (cm_node->recv_entry) {
 690                         kfree(new_send);
 691                         WARN_ON(1);
 692                         return -EINVAL;
 693                 }
 694                 cm_node->recv_entry = new_send;
 695         }
 696
 697         if (type == NES_TIMER_TYPE_SEND) {
 698                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 699                 atomic_inc(&new_send->skb->users);
 700                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 701                 cm_node->send_entry = new_send;
 702                 add_ref_cm_node(cm_node);
 703                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 704                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 705
 706                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 707                 if (ret != NETDEV_TX_OK) {
 708                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 709                                   "(jiffies = %lu)\n", new_send, jiffies);
 710                         new_send->timetosend = jiffies;
 711                         ret = NETDEV_TX_OK;
 712                 } else {
 713                         cm_packets_sent++;
 714                         if (!send_retrans) {
 715                                 cleanup_retrans_entry(cm_node);
 716                                 if (close_when_complete)
 717                                         rem_ref_cm_node(cm_core, cm_node);
 718                                 return ret;
 719                         }
 720                 }
 721         }
 722
 723         if (!timer_pending(&cm_core->tcp_timer))
 724                 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
 725
 726         return ret;
 727 }
 728
 729 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 730 {
 731         struct iw_cm_id *cm_id = cm_node->cm_id;
 732         enum nes_cm_node_state state = cm_node->state;
 733         cm_node->state = NES_CM_STATE_CLOSED;
 734
 735         switch (state) {
 736         case NES_CM_STATE_SYN_RCVD:
 737         case NES_CM_STATE_CLOSING:
 738                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 739                 break;
 740         case NES_CM_STATE_LAST_ACK:
 741         case NES_CM_STATE_FIN_WAIT1:
 742                 if (cm_node->cm_id)
 743                         cm_id->rem_ref(cm_id);
 744                 send_reset(cm_node, NULL);
 745                 break;
 746         default:
 747                 add_ref_cm_node(cm_node);
 748                 send_reset(cm_node, NULL);
 749                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 750         }
 751 }
 752
 753 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 754 {
 755         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 756         struct iw_cm_id *cm_id = cm_node->cm_id;
 757         struct nes_qp *nesqp;
 758         unsigned long qplockflags;
 759
 760         if (!recv_entry)
 761                 return;
 762         nesqp = (struct nes_qp *)recv_entry->skb;
 763         if (nesqp) {
 764                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 765                 if (nesqp->cm_id) {
 766                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 767                                   "refcount = %d: HIT A "
 768                                   "NES_TIMER_TYPE_CLOSE with something "
 769                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 770                                   atomic_read(&nesqp->refcount));
 771                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 772                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 773                         nesqp->ibqp_state = IB_QPS_ERR;
 774                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 775                         nes_cm_disconn(nesqp);
 776                 } else {
 777                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 778                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 779                                   "refcount = %d: HIT A "
 780                                   "NES_TIMER_TYPE_CLOSE with nothing "
 781                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 782                                   atomic_read(&nesqp->refcount));
 783                 }
 784         } else if (rem_node) {
 785                 /* TIME_WAIT state */
 786                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 787         }
 788         if (cm_node->cm_id)
 789                 cm_id->rem_ref(cm_id);
 790         kfree(recv_entry);
 791         cm_node->recv_entry = NULL;
 792 }
 793
 794 /**
 795  * nes_cm_timer_tick
 796  */
 797 static void nes_cm_timer_tick(unsigned long pass)
 798 {
 799         unsigned long flags;
 800         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 801         struct nes_cm_node *cm_node;
 802         struct nes_timer_entry *send_entry, *recv_entry;
 803         struct list_head *list_core_temp;
 804         struct list_head *list_node;
 805         struct nes_cm_core *cm_core = g_cm_core;
 806         u32 settimer = 0;
 807         unsigned long timetosend;
 808         int ret = NETDEV_TX_OK;
 809
 810         struct list_head timer_list;
 811
 812         INIT_LIST_HEAD(&timer_list);
 813         spin_lock_irqsave(&cm_core->ht_lock, flags);
 814
 815         list_for_each_safe(list_node, list_core_temp,
 816                            &cm_core->connected_nodes) {
 817                 cm_node = container_of(list_node, struct nes_cm_node, list);
 818                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 819                         add_ref_cm_node(cm_node);
 820                         list_add(&cm_node->timer_entry, &timer_list);
 821                 }
 822         }
 823         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 824
 825         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 826                 cm_node = container_of(list_node, struct nes_cm_node,
 827                                        timer_entry);
 828                 recv_entry = cm_node->recv_entry;
 829
 830                 if (recv_entry) {
 831                         if (time_after(recv_entry->timetosend, jiffies)) {
 832                                 if (nexttimeout > recv_entry->timetosend ||
 833                                     !settimer) {
 834                                         nexttimeout = recv_entry->timetosend;
 835                                         settimer = 1;
 836                                 }
 837                         } else {
 838                                 handle_recv_entry(cm_node, 1);
 839                         }
 840                 }
 841
 842                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 843                 do {
 844                         send_entry = cm_node->send_entry;
 845                         if (!send_entry)
 846                                 break;
 847                         if (time_after(send_entry->timetosend, jiffies)) {
 848                                 if (cm_node->state != NES_CM_STATE_TSA) {
 849                                         if ((nexttimeout >
 850                                              send_entry->timetosend) ||
 851                                             !settimer) {
 852                                                 nexttimeout =
 853                                                         send_entry->timetosend;
 854                                                 settimer = 1;
 855                                         }
 856                                 } else {
 857                                         free_retrans_entry(cm_node);
 858                                 }
 859                                 break;
 860                         }
 861
 862                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 863                             (cm_node->state == NES_CM_STATE_CLOSED)) {
 864                                 free_retrans_entry(cm_node);
 865                                 break;
 866                         }
 867
 868                         if (!send_entry->retranscount ||
 869                             !send_entry->retrycount) {
 870                                 cm_packets_dropped++;
 871                                 free_retrans_entry(cm_node);
 872
 873                                 spin_unlock_irqrestore(
 874                                         &cm_node->retrans_list_lock, flags);
 875                                 nes_retrans_expired(cm_node);
 876                                 cm_node->state = NES_CM_STATE_CLOSED;
 877                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 878                                                   flags);
 879                                 break;
 880                         }
 881                         atomic_inc(&send_entry->skb->users);
 882                         cm_packets_retrans++;
 883                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 884                                   "for node %p, jiffies = %lu, time to send = "
 885                                   "%lu, retranscount = %u, send_entry->seq_num = "
 886                                   "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 887                                   "0x%08X\n", send_entry, cm_node, jiffies,
 888                                   send_entry->timetosend,
 889                                   send_entry->retranscount,
 890                                   send_entry->seq_num,
 891                                   cm_node->tcp_cntxt.rem_ack_num);
 892
 893                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 894                                                flags);
 895                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 896                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 897                         if (ret != NETDEV_TX_OK) {
 898                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 899                                           "node=%p\n", cm_node);
 900                                 cm_packets_bounced++;
 901                                 send_entry->retrycount--;
 902                                 nexttimeout = jiffies + NES_SHORT_TIME;
 903                                 settimer = 1;
 904                                 break;
 905                         } else {
 906                                 cm_packets_sent++;
 907                         }
 908                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 909                                   "%u, retry count = %u.\n",
 910                                   send_entry->retranscount,
 911                                   send_entry->retrycount);
 912                         if (send_entry->send_retrans) {
 913                                 send_entry->retranscount--;
 914                                 timetosend = (NES_RETRY_TIMEOUT <<
 915                                               (NES_DEFAULT_RETRANS - send_entry->retranscount));
 916
 917                                 send_entry->timetosend = jiffies +
 918                                                          min(timetosend, NES_MAX_TIMEOUT);
 919                                 if (nexttimeout > send_entry->timetosend ||
 920                                     !settimer) {
 921                                         nexttimeout = send_entry->timetosend;
 922                                         settimer = 1;
 923                                 }
 924                         } else {
 925                                 int close_when_complete;
 926                                 close_when_complete =
 927                                         send_entry->close_when_complete;
 928                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 929                                           cm_node, cm_node->state);
 930                                 free_retrans_entry(cm_node);
 931                                 if (close_when_complete)
 932                                         rem_ref_cm_node(cm_node->cm_core,
 933                                                         cm_node);
 934                         }
 935                 } while (0);
 936
 937                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 938                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 939         }
 940
 941         if (settimer) {
 942                 if (!timer_pending(&cm_core->tcp_timer))
 943                         mod_timer(&cm_core->tcp_timer, nexttimeout);
 944         }
 945 }
 946
 947
 948 /**
 949  * send_syn
 950  */
 951 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 952                     struct sk_buff *skb)
 953 {
 954         int ret;
 955         int flags = SET_SYN;
 956         char optionsbuffer[sizeof(struct option_mss) +
 957                            sizeof(struct option_windowscale) + sizeof(struct option_base) +
 958                            TCP_OPTIONS_PADDING];
 959
 960         int optionssize = 0;
 961         /* Sending MSS option */
 962         union all_known_options *options;
 963
 964         if (!cm_node)
 965                 return -EINVAL;
 966
 967         options = (union all_known_options *)&optionsbuffer[optionssize];
 968         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 969         options->as_mss.length = sizeof(struct option_mss);
 970         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 971         optionssize += sizeof(struct option_mss);
 972
 973         options = (union all_known_options *)&optionsbuffer[optionssize];
 974         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 975         options->as_windowscale.length = sizeof(struct option_windowscale);
 976         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 977         optionssize += sizeof(struct option_windowscale);
 978
 979         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 980                 options = (union all_known_options *)&optionsbuffer[optionssize];
 981                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 982                 options->as_base.length = sizeof(struct option_base);
 983                 optionssize += sizeof(struct option_base);
 984                 /* we need the size to be a multiple of 4 */
 985                 options = (union all_known_options *)&optionsbuffer[optionssize];
 986                 options->as_end = 1;
 987                 optionssize += 1;
 988                 options = (union all_known_options *)&optionsbuffer[optionssize];
 989                 options->as_end = 1;
 990                 optionssize += 1;
 991         }
 992
 993         options = (union all_known_options *)&optionsbuffer[optionssize];
 994         options->as_end = OPTION_NUMBER_END;
 995         optionssize += 1;
 996
 997         if (!skb)
 998                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 999         if (!skb) {
1000                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1001                 return -1;
1002         }
1003
1004         if (sendack)
1005                 flags |= SET_ACK;
1006
1007         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1008         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1009
1010         return ret;
1011 }
1012
1013
1014 /**
1015  * send_reset
1016  */
1017 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1018 {
1019         int ret;
1020         int flags = SET_RST | SET_ACK;
1021
1022         if (!skb)
1023                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1024         if (!skb) {
1025                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1026                 return -ENOMEM;
1027         }
1028
1029         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1030         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1031
1032         return ret;
1033 }
1034
1035
1036 /**
1037  * send_ack
1038  */
1039 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1040 {
1041         int ret;
1042
1043         if (!skb)
1044                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1045
1046         if (!skb) {
1047                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1048                 return -1;
1049         }
1050
1051         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1052         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1053
1054         return ret;
1055 }
1056
1057
1058 /**
1059  * send_fin
1060  */
1061 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1062 {
1063         int ret;
1064
1065         /* if we didn't get a frame get one */
1066         if (!skb)
1067                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1068
1069         if (!skb) {
1070                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1071                 return -1;
1072         }
1073
1074         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1075         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1076
1077         return ret;
1078 }
1079
1080
1081 /**
1082  * find_node - find a cm node that matches the reference cm node
1083  */
1084 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1085                                      u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1086 {
1087         unsigned long flags;
1088         struct list_head *hte;
1089         struct nes_cm_node *cm_node;
1090
1091         /* get a handle on the hte */
1092         hte = &cm_core->connected_nodes;
1093
1094         /* walk list and find cm_node associated with this session ID */
1095         spin_lock_irqsave(&cm_core->ht_lock, flags);
1096         list_for_each_entry(cm_node, hte, list) {
1097                 /* compare quad, return node handle if a match */
1098                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1099                           cm_node->loc_addr, cm_node->loc_port,
1100                           loc_addr, loc_port,
1101                           cm_node->rem_addr, cm_node->rem_port,
1102                           rem_addr, rem_port);
1103                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
1104                     (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
1105                         add_ref_cm_node(cm_node);
1106                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1107                         return cm_node;
1108                 }
1109         }
1110         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1111
1112         /* no owner node */
1113         return NULL;
1114 }
1115
1116
1117 /**
1118  * find_listener - find a cm node listening on this addr-port pair
1119  */
1120 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1121                                              nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
1122 {
1123         unsigned long flags;
1124         struct nes_cm_listener *listen_node;
1125
1126         /* walk list and find cm_node associated with this session ID */
1127         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1128         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1129                 /* compare node pair, return node handle if a match */
1130                 if (((listen_node->loc_addr == dst_addr) ||
1131                      listen_node->loc_addr == 0x00000000) &&
1132                     (listen_node->loc_port == dst_port) &&
1133                     (listener_state & listen_node->listener_state)) {
1134                         atomic_inc(&listen_node->ref_count);
1135                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1136                         return listen_node;
1137                 }
1138         }
1139         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1140
1141         /* no listener */
1142         return NULL;
1143 }
1144
1145
1146 /**
1147  * add_hte_node - add a cm node to the hash table
1148  */
1149 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1150 {
1151         unsigned long flags;
1152         struct list_head *hte;
1153
1154         if (!cm_node || !cm_core)
1155                 return -EINVAL;
1156
1157         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1158                   cm_node);
1159
1160         spin_lock_irqsave(&cm_core->ht_lock, flags);
1161
1162         /* get a handle on the hash table element (list head for this slot) */
1163         hte = &cm_core->connected_nodes;
1164         list_add_tail(&cm_node->list, hte);
1165         atomic_inc(&cm_core->ht_node_cnt);
1166
1167         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1168
1169         return 0;
1170 }
1171
1172
1173 /**
1174  * mini_cm_dec_refcnt_listen
1175  */
1176 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1177                                      struct nes_cm_listener *listener, int free_hanging_nodes)
1178 {
1179         int ret = -EINVAL;
1180         int err = 0;
1181         unsigned long flags;
1182         struct list_head *list_pos = NULL;
1183         struct list_head *list_temp = NULL;
1184         struct nes_cm_node *cm_node = NULL;
1185         struct list_head reset_list;
1186
1187         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1188                   "refcnt=%d\n", listener, free_hanging_nodes,
1189                   atomic_read(&listener->ref_count));
1190         /* free non-accelerated child nodes for this listener */
1191         INIT_LIST_HEAD(&reset_list);
1192         if (free_hanging_nodes) {
1193                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1194                 list_for_each_safe(list_pos, list_temp,
1195                                    &g_cm_core->connected_nodes) {
1196                         cm_node = container_of(list_pos, struct nes_cm_node,
1197                                                list);
1198                         if ((cm_node->listener == listener) &&
1199                             (!cm_node->accelerated)) {
1200                                 add_ref_cm_node(cm_node);
1201                                 list_add(&cm_node->reset_entry, &reset_list);
1202                         }
1203                 }
1204                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1205         }
1206
1207         list_for_each_safe(list_pos, list_temp, &reset_list) {
1208                 cm_node = container_of(list_pos, struct nes_cm_node,
1209                                        reset_entry);
1210                 {
1211                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
1212                         enum nes_cm_node_state old_state;
1213                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1214                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1215                         } else {
1216                                 if (!loopback) {
1217                                         cleanup_retrans_entry(cm_node);
1218                                         err = send_reset(cm_node, NULL);
1219                                         if (err) {
1220                                                 cm_node->state =
1221                                                         NES_CM_STATE_CLOSED;
1222                                                 WARN_ON(1);
1223                                         } else {
1224                                                 old_state = cm_node->state;
1225                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1226                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1227                                                         rem_ref_cm_node(
1228                                                                 cm_node->cm_core,
1229                                                                 cm_node);
1230                                         }
1231                                 } else {
1232                                         struct nes_cm_event event;
1233
1234                                         event.cm_node = loopback;
1235                                         event.cm_info.rem_addr =
1236                                                         loopback->rem_addr;
1237                                         event.cm_info.loc_addr =
1238                                                         loopback->loc_addr;
1239                                         event.cm_info.rem_port =
1240                                                         loopback->rem_port;
1241                                         event.cm_info.loc_port =
1242                                                          loopback->loc_port;
1243                                         event.cm_info.cm_id = loopback->cm_id;
1244                                         add_ref_cm_node(loopback);
1245                                         loopback->state = NES_CM_STATE_CLOSED;
1246                                         cm_event_connect_error(&event);
1247                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1248
1249                                         rem_ref_cm_node(cm_node->cm_core,
1250                                                          cm_node);
1251
1252                                 }
1253                         }
1254                 }
1255         }
1256
1257         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1258         if (!atomic_dec_return(&listener->ref_count)) {
1259                 list_del(&listener->list);
1260
1261                 /* decrement our listen node count */
1262                 atomic_dec(&cm_core->listen_node_cnt);
1263
1264                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1265
1266                 if (listener->nesvnic)
1267                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1268                                          PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1269
1270                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1271
1272                 kfree(listener);
1273                 listener = NULL;
1274                 ret = 0;
1275                 atomic_inc(&cm_listens_destroyed);
1276         } else {
1277                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1278         }
1279         if (listener) {
1280                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1281                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1282                                   " with non-zero pending accepts=%u\n",
1283                                   listener, atomic_read(&listener->pend_accepts_cnt));
1284         }
1285
1286         return ret;
1287 }
1288
1289
1290 /**
1291  * mini_cm_del_listen
1292  */
1293 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1294                               struct nes_cm_listener *listener)
1295 {
1296         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1297         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1298         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1299 }
1300
1301
1302 /**
1303  * mini_cm_accelerated
1304  */
1305 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1306                                       struct nes_cm_node *cm_node)
1307 {
1308         cm_node->accelerated = 1;
1309
1310         if (cm_node->accept_pend) {
1311                 BUG_ON(!cm_node->listener);
1312                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1313                 cm_node->accept_pend = 0;
1314                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1315         }
1316
1317         if (!timer_pending(&cm_core->tcp_timer))
1318                 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1319
1320         return 0;
1321 }
1322
1323
1324 /**
1325  * nes_addr_resolve_neigh
1326  */
1327 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1328 {
1329         struct rtable *rt;
1330         struct neighbour *neigh;
1331         int rc = arpindex;
1332         struct net_device *netdev;
1333         struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1334
1335         rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1336         if (IS_ERR(rt)) {
1337                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1338                        __func__, dst_ip);
1339                 return rc;
1340         }
1341
1342         if (netif_is_bond_slave(nesvnic->netdev))
1343                 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1344         else
1345                 netdev = nesvnic->netdev;
1346
1347         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1348
1349         rcu_read_lock();
1350         if (neigh) {
1351                 if (neigh->nud_state & NUD_VALID) {
1352                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1353                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1354                                   neigh->ha, ntohl(rt->rt_gateway));
1355
1356                         if (arpindex >= 0) {
1357                                 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1358                                         /* Mac address same as in nes_arp_table */
1359                                         goto out;
1360                                 }
1361
1362                                 nes_manage_arp_cache(nesvnic->netdev,
1363                                                      nesadapter->arp_table[arpindex].mac_addr,
1364                                                      dst_ip, NES_ARP_DELETE);
1365                         }
1366
1367                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1368                                              dst_ip, NES_ARP_ADD);
1369                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1370                                            NES_ARP_RESOLVE);
1371                 } else {
1372                         neigh_event_send(neigh, NULL);
1373                 }
1374         }
1375 out:
1376         rcu_read_unlock();
1377
1378         if (neigh)
1379                 neigh_release(neigh);
1380
1381         ip_rt_put(rt);
1382         return rc;
1383 }
1384
1385 /**
1386  * make_cm_node - create a new instance of a cm node
1387  */
1388 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1389                                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1390                                         struct nes_cm_listener *listener)
1391 {
1392         struct nes_cm_node *cm_node;
1393         struct timespec ts;
1394         int oldarpindex = 0;
1395         int arpindex = 0;
1396         struct nes_device *nesdev;
1397         struct nes_adapter *nesadapter;
1398
1399         /* create an hte and cm_node for this instance */
1400         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1401         if (!cm_node)
1402                 return NULL;
1403
1404         /* set our node specific transport info */
1405         cm_node->loc_addr = cm_info->loc_addr;
1406         cm_node->rem_addr = cm_info->rem_addr;
1407         cm_node->loc_port = cm_info->loc_port;
1408         cm_node->rem_port = cm_info->rem_port;
1409
1410         cm_node->mpa_frame_rev = mpa_version;
1411         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1412         cm_node->ird_size = IETF_NO_IRD_ORD;
1413         cm_node->ord_size = IETF_NO_IRD_ORD;
1414
1415         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1416                   &cm_node->loc_addr, cm_node->loc_port,
1417                   &cm_node->rem_addr, cm_node->rem_port);
1418         cm_node->listener = listener;
1419         cm_node->netdev = nesvnic->netdev;
1420         cm_node->cm_id = cm_info->cm_id;
1421         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1422
1423         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1424                   cm_node->cm_id);
1425
1426         spin_lock_init(&cm_node->retrans_list_lock);
1427
1428         cm_node->loopbackpartner = NULL;
1429         atomic_set(&cm_node->ref_count, 1);
1430         /* associate our parent CM core */
1431         cm_node->cm_core = cm_core;
1432         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1433         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1434         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1435                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1436         ts = current_kernel_time();
1437         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1438         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1439                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1440         cm_node->tcp_cntxt.rcv_nxt = 0;
1441         /* get a unique session ID , add thread_id to an upcounter to handle race */
1442         atomic_inc(&cm_core->node_cnt);
1443         cm_node->conn_type = cm_info->conn_type;
1444         cm_node->apbvt_set = 0;
1445         cm_node->accept_pend = 0;
1446
1447         cm_node->nesvnic = nesvnic;
1448         /* get some device handles, for arp lookup */
1449         nesdev = nesvnic->nesdev;
1450         nesadapter = nesdev->nesadapter;
1451
1452         cm_node->loopbackpartner = NULL;
1453
1454         /* get the mac addr for the remote node */
1455         oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1456         arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1457         if (arpindex < 0) {
1458                 kfree(cm_node);
1459                 return NULL;
1460         }
1461
1462         /* copy the mac addr to node context */
1463         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1464         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1465                   cm_node->rem_mac);
1466
1467         add_hte_node(cm_core, cm_node);
1468         atomic_inc(&cm_nodes_created);
1469
1470         return cm_node;
1471 }
1472
1473
1474 /**
1475  * add_ref_cm_node - destroy an instance of a cm node
1476  */
1477 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1478 {
1479         atomic_inc(&cm_node->ref_count);
1480         return 0;
1481 }
1482
1483
1484 /**
1485  * rem_ref_cm_node - destroy an instance of a cm node
1486  */
1487 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1488                            struct nes_cm_node *cm_node)
1489 {
1490         unsigned long flags;
1491         struct nes_qp *nesqp;
1492
1493         if (!cm_node)
1494                 return -EINVAL;
1495
1496         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1497         if (atomic_dec_return(&cm_node->ref_count)) {
1498                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1499                 return 0;
1500         }
1501         list_del(&cm_node->list);
1502         atomic_dec(&cm_core->ht_node_cnt);
1503         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1504
1505         /* if the node is destroyed before connection was accelerated */
1506         if (!cm_node->accelerated && cm_node->accept_pend) {
1507                 BUG_ON(!cm_node->listener);
1508                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1509                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1510         }
1511         WARN_ON(cm_node->send_entry);
1512         if (cm_node->recv_entry)
1513                 handle_recv_entry(cm_node, 0);
1514         if (cm_node->listener) {
1515                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1516         } else {
1517                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1518                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1519                                          PCI_FUNC(
1520                                                  cm_node->nesvnic->nesdev->pcidev->devfn),
1521                                          NES_MANAGE_APBVT_DEL);
1522                 }
1523         }
1524
1525         atomic_dec(&cm_core->node_cnt);
1526         atomic_inc(&cm_nodes_destroyed);
1527         nesqp = cm_node->nesqp;
1528         if (nesqp) {
1529                 nesqp->cm_node = NULL;
1530                 nes_rem_ref(&nesqp->ibqp);
1531                 cm_node->nesqp = NULL;
1532         }
1533
1534         kfree(cm_node);
1535         return 0;
1536 }
1537
1538 /**
1539  * process_options
1540  */
1541 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1542                            u32 optionsize, u32 syn_packet)
1543 {
1544         u32 tmp;
1545         u32 offset = 0;
1546         union all_known_options *all_options;
1547         char got_mss_option = 0;
1548
1549         while (offset < optionsize) {
1550                 all_options = (union all_known_options *)(optionsloc + offset);
1551                 switch (all_options->as_base.optionnum) {
1552                 case OPTION_NUMBER_END:
1553                         offset = optionsize;
1554                         break;
1555                 case OPTION_NUMBER_NONE:
1556                         offset += 1;
1557                         continue;
1558                 case OPTION_NUMBER_MSS:
1559                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1560                                   "Size: %d\n", __func__,
1561                                   all_options->as_mss.length, offset, optionsize);
1562                         got_mss_option = 1;
1563                         if (all_options->as_mss.length != 4) {
1564                                 return 1;
1565                         } else {
1566                                 tmp = ntohs(all_options->as_mss.mss);
1567                                 if (tmp > 0 && tmp <
1568                                     cm_node->tcp_cntxt.mss)
1569                                         cm_node->tcp_cntxt.mss = tmp;
1570                         }
1571                         break;
1572                 case OPTION_NUMBER_WINDOW_SCALE:
1573                         cm_node->tcp_cntxt.snd_wscale =
1574                                 all_options->as_windowscale.shiftcount;
1575                         break;
1576                 default:
1577                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1578                                   all_options->as_base.optionnum);
1579                         break;
1580                 }
1581                 offset += all_options->as_base.length;
1582         }
1583         if ((!got_mss_option) && (syn_packet))
1584                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1585         return 0;
1586 }
1587
1588 static void drop_packet(struct sk_buff *skb)
1589 {
1590         atomic_inc(&cm_accel_dropped_pkts);
1591         dev_kfree_skb_any(skb);
1592 }
1593
1594 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1595 {
1596         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1597                   "refcnt=%d\n", cm_node, cm_node->state,
1598                   atomic_read(&cm_node->ref_count));
1599         switch (cm_node->state) {
1600         case NES_CM_STATE_SYN_RCVD:
1601         case NES_CM_STATE_SYN_SENT:
1602         case NES_CM_STATE_ESTABLISHED:
1603         case NES_CM_STATE_MPAREJ_RCVD:
1604                 cm_node->tcp_cntxt.rcv_nxt++;
1605                 cleanup_retrans_entry(cm_node);
1606                 cm_node->state = NES_CM_STATE_LAST_ACK;
1607                 send_fin(cm_node, NULL);
1608                 break;
1609         case NES_CM_STATE_MPAREQ_SENT:
1610                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1611                 cm_node->tcp_cntxt.rcv_nxt++;
1612                 cleanup_retrans_entry(cm_node);
1613                 cm_node->state = NES_CM_STATE_CLOSED;
1614                 add_ref_cm_node(cm_node);
1615                 send_reset(cm_node, NULL);
1616                 break;
1617         case NES_CM_STATE_FIN_WAIT1:
1618                 cm_node->tcp_cntxt.rcv_nxt++;
1619                 cleanup_retrans_entry(cm_node);
1620                 cm_node->state = NES_CM_STATE_CLOSING;
1621                 send_ack(cm_node, NULL);
1622                 /* Wait for ACK as this is simultaneous close..
1623                 * After we receive ACK, do not send anything..
1624                 * Just rm the node.. Done.. */
1625                 break;
1626         case NES_CM_STATE_FIN_WAIT2:
1627                 cm_node->tcp_cntxt.rcv_nxt++;
1628                 cleanup_retrans_entry(cm_node);
1629                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1630                 send_ack(cm_node, NULL);
1631                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1632                 break;
1633         case NES_CM_STATE_TIME_WAIT:
1634                 cm_node->tcp_cntxt.rcv_nxt++;
1635                 cleanup_retrans_entry(cm_node);
1636                 cm_node->state = NES_CM_STATE_CLOSED;
1637                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1638                 break;
1639         case NES_CM_STATE_TSA:
1640         default:
1641                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1642                         cm_node, cm_node->state);
1643                 break;
1644         }
1645 }
1646
1647
1648 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1649         struct tcphdr *tcph)
1650 {
1651
1652         int     reset = 0;      /* whether to send reset in case of err.. */
1653         atomic_inc(&cm_resets_recvd);
1654         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1655                         " refcnt=%d\n", cm_node, cm_node->state,
1656                         atomic_read(&cm_node->ref_count));
1657         cleanup_retrans_entry(cm_node);
1658         switch (cm_node->state) {
1659         case NES_CM_STATE_SYN_SENT:
1660         case NES_CM_STATE_MPAREQ_SENT:
1661                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1662                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1663                         cm_node->listener, cm_node->state);
1664                 switch (cm_node->mpa_frame_rev) {
1665                 case IETF_MPA_V2:
1666                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1667                         /* send a syn and goto syn sent state */
1668                         cm_node->state = NES_CM_STATE_SYN_SENT;
1669                         if (send_syn(cm_node, 0, NULL)) {
1670                                 active_open_err(cm_node, skb, reset);
1671                         }
1672                         break;
1673                 case IETF_MPA_V1:
1674                 default:
1675                         active_open_err(cm_node, skb, reset);
1676                         break;
1677                 }
1678                 break;
1679         case NES_CM_STATE_MPAREQ_RCVD:
1680                 atomic_inc(&cm_node->passive_state);
1681                 dev_kfree_skb_any(skb);
1682                 break;
1683         case NES_CM_STATE_ESTABLISHED:
1684         case NES_CM_STATE_SYN_RCVD:
1685         case NES_CM_STATE_LISTENING:
1686                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1687                 passive_open_err(cm_node, skb, reset);
1688                 break;
1689         case NES_CM_STATE_TSA:
1690                 active_open_err(cm_node, skb, reset);
1691                 break;
1692         case NES_CM_STATE_CLOSED:
1693                 drop_packet(skb);
1694                 break;
1695         case NES_CM_STATE_FIN_WAIT2:
1696         case NES_CM_STATE_FIN_WAIT1:
1697         case NES_CM_STATE_LAST_ACK:
1698                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1699         case NES_CM_STATE_TIME_WAIT:
1700                 cm_node->state = NES_CM_STATE_CLOSED;
1701                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1702                 drop_packet(skb);
1703                 break;
1704         default:
1705                 drop_packet(skb);
1706                 break;
1707         }
1708 }
1709
1710
1711 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1712 {
1713         int ret = 0;
1714         int datasize = skb->len;
1715         u8 *dataloc = skb->data;
1716
1717         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1718         u32 res_type;
1719
1720         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1721         if (ret) {
1722                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1723                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1724                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1725                                   "cm_node=%p listener=%p state=%d\n", __func__,
1726                                   __LINE__, cm_node, cm_node->listener,
1727                                   cm_node->state);
1728                         active_open_err(cm_node, skb, 1);
1729                 } else {
1730                         passive_open_err(cm_node, skb, 1);
1731                 }
1732                 return;
1733         }
1734
1735         switch (cm_node->state) {
1736         case NES_CM_STATE_ESTABLISHED:
1737                 if (res_type == NES_MPA_REQUEST_REJECT)
1738                         /*BIG problem as we are receiving the MPA.. So should
1739                          * not be REJECT.. This is Passive Open.. We can
1740                          * only receive it Reject for Active Open...*/
1741                         WARN_ON(1);
1742                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1743                 type = NES_CM_EVENT_MPA_REQ;
1744                 atomic_set(&cm_node->passive_state,
1745                            NES_PASSIVE_STATE_INDICATED);
1746                 break;
1747         case NES_CM_STATE_MPAREQ_SENT:
1748                 cleanup_retrans_entry(cm_node);
1749                 if (res_type == NES_MPA_REQUEST_REJECT) {
1750                         type = NES_CM_EVENT_MPA_REJECT;
1751                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1752                 } else {
1753                         type = NES_CM_EVENT_CONNECTED;
1754                         cm_node->state = NES_CM_STATE_TSA;
1755                 }
1756
1757                 break;
1758         default:
1759                 WARN_ON(1);
1760                 break;
1761         }
1762         dev_kfree_skb_any(skb);
1763         create_event(cm_node, type);
1764 }
1765
1766 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1767 {
1768         switch (cm_node->state) {
1769         case NES_CM_STATE_SYN_SENT:
1770         case NES_CM_STATE_MPAREQ_SENT:
1771                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1772                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1773                           cm_node->listener, cm_node->state);
1774                 active_open_err(cm_node, skb, 1);
1775                 break;
1776         case NES_CM_STATE_ESTABLISHED:
1777         case NES_CM_STATE_SYN_RCVD:
1778                 passive_open_err(cm_node, skb, 1);
1779                 break;
1780         case NES_CM_STATE_TSA:
1781         default:
1782                 drop_packet(skb);
1783         }
1784 }
1785
1786 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1787                      struct sk_buff *skb)
1788 {
1789         int err;
1790
1791         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1792         if (err)
1793                 active_open_err(cm_node, skb, 1);
1794
1795         return err;
1796 }
1797
1798 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1799                      struct sk_buff *skb)
1800 {
1801         int err = 0;
1802         u32 seq;
1803         u32 ack_seq;
1804         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1805         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1806         u32 rcv_wnd;
1807
1808         seq = ntohl(tcph->seq);
1809         ack_seq = ntohl(tcph->ack_seq);
1810         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1811         if (ack_seq != loc_seq_num)
1812                 err = 1;
1813         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1814                 err = 1;
1815         if (err) {
1816                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1817                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1818                           cm_node->listener, cm_node->state);
1819                 indicate_pkt_err(cm_node, skb);
1820                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1821                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1822                           rcv_wnd);
1823         }
1824         return err;
1825 }
1826
1827 /*
1828  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1829  * is created with a listener or it may comein as rexmitted packet which in
1830  * that case will be just dropped.
1831  */
1832 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1833                            struct tcphdr *tcph)
1834 {
1835         int ret;
1836         u32 inc_sequence;
1837         int optionsize;
1838
1839         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1840         skb_trim(skb, 0);
1841         inc_sequence = ntohl(tcph->seq);
1842
1843         switch (cm_node->state) {
1844         case NES_CM_STATE_SYN_SENT:
1845         case NES_CM_STATE_MPAREQ_SENT:
1846                 /* Rcvd syn on active open connection*/
1847                 active_open_err(cm_node, skb, 1);
1848                 break;
1849         case NES_CM_STATE_LISTENING:
1850                 /* Passive OPEN */
1851                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1852                     cm_node->listener->backlog) {
1853                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1854                                   "pressure \n");
1855                         cm_backlog_drops++;
1856                         passive_open_err(cm_node, skb, 0);
1857                         break;
1858                 }
1859                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1860                                          1);
1861                 if (ret) {
1862                         passive_open_err(cm_node, skb, 0);
1863                         /* drop pkt */
1864                         break;
1865                 }
1866                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1867                 BUG_ON(cm_node->send_entry);
1868                 cm_node->accept_pend = 1;
1869                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1870
1871                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1872                 send_syn(cm_node, 1, skb);
1873                 break;
1874         case NES_CM_STATE_CLOSED:
1875                 cleanup_retrans_entry(cm_node);
1876                 add_ref_cm_node(cm_node);
1877                 send_reset(cm_node, skb);
1878                 break;
1879         case NES_CM_STATE_TSA:
1880         case NES_CM_STATE_ESTABLISHED:
1881         case NES_CM_STATE_FIN_WAIT1:
1882         case NES_CM_STATE_FIN_WAIT2:
1883         case NES_CM_STATE_MPAREQ_RCVD:
1884         case NES_CM_STATE_LAST_ACK:
1885         case NES_CM_STATE_CLOSING:
1886         case NES_CM_STATE_UNKNOWN:
1887         default:
1888                 drop_packet(skb);
1889                 break;
1890         }
1891 }
1892
1893 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1894                               struct tcphdr *tcph)
1895 {
1896         int ret;
1897         u32 inc_sequence;
1898         int optionsize;
1899
1900         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1901         skb_trim(skb, 0);
1902         inc_sequence = ntohl(tcph->seq);
1903         switch (cm_node->state) {
1904         case NES_CM_STATE_SYN_SENT:
1905                 cleanup_retrans_entry(cm_node);
1906                 /* active open */
1907                 if (check_syn(cm_node, tcph, skb))
1908                         return;
1909                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1910                 /* setup options */
1911                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1912                 if (ret) {
1913                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1914                                   cm_node);
1915                         break;
1916                 }
1917                 cleanup_retrans_entry(cm_node);
1918                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1919                 send_mpa_request(cm_node, skb);
1920                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1921                 break;
1922         case NES_CM_STATE_MPAREQ_RCVD:
1923                 /* passive open, so should not be here */
1924                 passive_open_err(cm_node, skb, 1);
1925                 break;
1926         case NES_CM_STATE_LISTENING:
1927                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1928                 cleanup_retrans_entry(cm_node);
1929                 cm_node->state = NES_CM_STATE_CLOSED;
1930                 send_reset(cm_node, skb);
1931                 break;
1932         case NES_CM_STATE_CLOSED:
1933                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1934                 cleanup_retrans_entry(cm_node);
1935                 add_ref_cm_node(cm_node);
1936                 send_reset(cm_node, skb);
1937                 break;
1938         case NES_CM_STATE_ESTABLISHED:
1939         case NES_CM_STATE_FIN_WAIT1:
1940         case NES_CM_STATE_FIN_WAIT2:
1941         case NES_CM_STATE_LAST_ACK:
1942         case NES_CM_STATE_TSA:
1943         case NES_CM_STATE_CLOSING:
1944         case NES_CM_STATE_UNKNOWN:
1945         case NES_CM_STATE_MPAREQ_SENT:
1946         default:
1947                 drop_packet(skb);
1948                 break;
1949         }
1950 }
1951
1952 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1953                           struct tcphdr *tcph)
1954 {
1955         int datasize = 0;
1956         u32 inc_sequence;
1957         int ret = 0;
1958         int optionsize;
1959
1960         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1961
1962         if (check_seq(cm_node, tcph, skb))
1963                 return -EINVAL;
1964
1965         skb_pull(skb, tcph->doff << 2);
1966         inc_sequence = ntohl(tcph->seq);
1967         datasize = skb->len;
1968         switch (cm_node->state) {
1969         case NES_CM_STATE_SYN_RCVD:
1970                 /* Passive OPEN */
1971                 cleanup_retrans_entry(cm_node);
1972                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1973                 if (ret)
1974                         break;
1975                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1976                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1977                 if (datasize) {
1978                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1979                         handle_rcv_mpa(cm_node, skb);
1980                 } else { /* rcvd ACK only */
1981                         dev_kfree_skb_any(skb);
1982                 }
1983                 break;
1984         case NES_CM_STATE_ESTABLISHED:
1985                 /* Passive OPEN */
1986                 cleanup_retrans_entry(cm_node);
1987                 if (datasize) {
1988                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1989                         handle_rcv_mpa(cm_node, skb);
1990                 } else {
1991                         drop_packet(skb);
1992                 }
1993                 break;
1994         case NES_CM_STATE_MPAREQ_SENT:
1995                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1996                 if (datasize) {
1997                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1998                         handle_rcv_mpa(cm_node, skb);
1999                 } else { /* Could be just an ack pkt.. */
2000                         dev_kfree_skb_any(skb);
2001                 }
2002                 break;
2003         case NES_CM_STATE_LISTENING:
2004                 cleanup_retrans_entry(cm_node);
2005                 cm_node->state = NES_CM_STATE_CLOSED;
2006                 send_reset(cm_node, skb);
2007                 break;
2008         case NES_CM_STATE_CLOSED:
2009                 cleanup_retrans_entry(cm_node);
2010                 add_ref_cm_node(cm_node);
2011                 send_reset(cm_node, skb);
2012                 break;
2013         case NES_CM_STATE_LAST_ACK:
2014         case NES_CM_STATE_CLOSING:
2015                 cleanup_retrans_entry(cm_node);
2016                 cm_node->state = NES_CM_STATE_CLOSED;
2017                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2018                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2019                 drop_packet(skb);
2020                 break;
2021         case NES_CM_STATE_FIN_WAIT1:
2022                 cleanup_retrans_entry(cm_node);
2023                 drop_packet(skb);
2024                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2025                 break;
2026         case NES_CM_STATE_SYN_SENT:
2027         case NES_CM_STATE_FIN_WAIT2:
2028         case NES_CM_STATE_TSA:
2029         case NES_CM_STATE_MPAREQ_RCVD:
2030         case NES_CM_STATE_UNKNOWN:
2031         default:
2032                 cleanup_retrans_entry(cm_node);
2033                 drop_packet(skb);
2034                 break;
2035         }
2036         return ret;
2037 }
2038
2039
2040
2041 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2042                               struct sk_buff *skb, int optionsize, int passive)
2043 {
2044         u8 *optionsloc = (u8 *)&tcph[1];
2045
2046         if (optionsize) {
2047                 if (process_options(cm_node, optionsloc, optionsize,
2048                                     (u32)tcph->syn)) {
2049                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2050                                   __func__, cm_node);
2051                         if (passive)
2052                                 passive_open_err(cm_node, skb, 1);
2053                         else
2054                                 active_open_err(cm_node, skb, 1);
2055                         return 1;
2056                 }
2057         }
2058
2059         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2060                                      cm_node->tcp_cntxt.snd_wscale;
2061
2062         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2063                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2064         return 0;
2065 }
2066
2067 /*
2068  * active_open_err() will send reset() if flag set..
2069  * It will also send ABORT event.
2070  */
2071 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2072                             int reset)
2073 {
2074         cleanup_retrans_entry(cm_node);
2075         if (reset) {
2076                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2077                           "state=%d\n", cm_node, cm_node->state);
2078                 add_ref_cm_node(cm_node);
2079                 send_reset(cm_node, skb);
2080         } else {
2081                 dev_kfree_skb_any(skb);
2082         }
2083
2084         cm_node->state = NES_CM_STATE_CLOSED;
2085         create_event(cm_node, NES_CM_EVENT_ABORTED);
2086 }
2087
2088 /*
2089  * passive_open_err() will either do a reset() or will free up the skb and
2090  * remove the cm_node.
2091  */
2092 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2093                              int reset)
2094 {
2095         cleanup_retrans_entry(cm_node);
2096         cm_node->state = NES_CM_STATE_CLOSED;
2097         if (reset) {
2098                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2099                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2100                 send_reset(cm_node, skb);
2101         } else {
2102                 dev_kfree_skb_any(skb);
2103                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2104         }
2105 }
2106
2107 /*
2108  * free_retrans_entry() routines assumes that the retrans_list_lock has
2109  * been acquired before calling.
2110  */
2111 static void free_retrans_entry(struct nes_cm_node *cm_node)
2112 {
2113         struct nes_timer_entry *send_entry;
2114
2115         send_entry = cm_node->send_entry;
2116         if (send_entry) {
2117                 cm_node->send_entry = NULL;
2118                 dev_kfree_skb_any(send_entry->skb);
2119                 kfree(send_entry);
2120                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2121         }
2122 }
2123
2124 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2125 {
2126         unsigned long flags;
2127
2128         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2129         free_retrans_entry(cm_node);
2130         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2131 }
2132
2133 /**
2134  * process_packet
2135  * Returns skb if to be freed, else it will return NULL if already used..
2136  */
2137 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2138                            struct nes_cm_core *cm_core)
2139 {
2140         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2141         struct tcphdr *tcph = tcp_hdr(skb);
2142         u32 fin_set = 0;
2143         int ret = 0;
2144
2145         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2146
2147         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2148                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2149                   tcph->ack, tcph->rst, tcph->fin);
2150
2151         if (tcph->rst) {
2152                 pkt_type = NES_PKT_TYPE_RST;
2153         } else if (tcph->syn) {
2154                 pkt_type = NES_PKT_TYPE_SYN;
2155                 if (tcph->ack)
2156                         pkt_type = NES_PKT_TYPE_SYNACK;
2157         } else if (tcph->ack) {
2158                 pkt_type = NES_PKT_TYPE_ACK;
2159         }
2160         if (tcph->fin)
2161                 fin_set = 1;
2162
2163         switch (pkt_type) {
2164         case NES_PKT_TYPE_SYN:
2165                 handle_syn_pkt(cm_node, skb, tcph);
2166                 break;
2167         case NES_PKT_TYPE_SYNACK:
2168                 handle_synack_pkt(cm_node, skb, tcph);
2169                 break;
2170         case NES_PKT_TYPE_ACK:
2171                 ret = handle_ack_pkt(cm_node, skb, tcph);
2172                 if (fin_set && !ret)
2173                         handle_fin_pkt(cm_node);
2174                 break;
2175         case NES_PKT_TYPE_RST:
2176                 handle_rst_pkt(cm_node, skb, tcph);
2177                 break;
2178         default:
2179                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2180                         handle_fin_pkt(cm_node);
2181                 drop_packet(skb);
2182                 break;
2183         }
2184 }
2185
2186 /**
2187  * mini_cm_listen - create a listen node with params
2188  */
2189 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2190                                               struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2191 {
2192         struct nes_cm_listener *listener;
2193         unsigned long flags;
2194
2195         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2196                   cm_info->loc_addr, cm_info->loc_port);
2197
2198         /* cannot have multiple matching listeners */
2199         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2200                                  htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2201         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2202                 /* find automatically incs ref count ??? */
2203                 atomic_dec(&listener->ref_count);
2204                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2205                 return NULL;
2206         }
2207
2208         if (!listener) {
2209                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2210                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2211                 if (!listener) {
2212                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2213                         return NULL;
2214                 }
2215
2216                 listener->loc_addr = htonl(cm_info->loc_addr);
2217                 listener->loc_port = htons(cm_info->loc_port);
2218                 listener->reused_node = 0;
2219
2220                 atomic_set(&listener->ref_count, 1);
2221         }
2222         /* pasive case */
2223         /* find already inc'ed the ref count */
2224         else {
2225                 listener->reused_node = 1;
2226         }
2227
2228         listener->cm_id = cm_info->cm_id;
2229         atomic_set(&listener->pend_accepts_cnt, 0);
2230         listener->cm_core = cm_core;
2231         listener->nesvnic = nesvnic;
2232         atomic_inc(&cm_core->node_cnt);
2233
2234         listener->conn_type = cm_info->conn_type;
2235         listener->backlog = cm_info->backlog;
2236         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2237
2238         if (!listener->reused_node) {
2239                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2240                 list_add(&listener->list, &cm_core->listen_list.list);
2241                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2242                 atomic_inc(&cm_core->listen_node_cnt);
2243         }
2244
2245         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2246                   " listener = %p, backlog = %d, cm_id = %p.\n",
2247                   cm_info->loc_addr, cm_info->loc_port,
2248                   listener, listener->backlog, listener->cm_id);
2249
2250         return listener;
2251 }
2252
2253
2254 /**
2255  * mini_cm_connect - make a connection node with params
2256  */
2257 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2258                                            struct nes_vnic *nesvnic, u16 private_data_len,
2259                                            void *private_data, struct nes_cm_info *cm_info)
2260 {
2261         int ret = 0;
2262         struct nes_cm_node *cm_node;
2263         struct nes_cm_listener *loopbackremotelistener;
2264         struct nes_cm_node *loopbackremotenode;
2265         struct nes_cm_info loopback_cm_info;
2266         u8 *start_buff;
2267
2268         /* create a CM connection node */
2269         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2270         if (!cm_node)
2271                 return NULL;
2272
2273         /* set our node side to client (active) side */
2274         cm_node->tcp_cntxt.client = 1;
2275         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2276
2277         if (cm_info->loc_addr == cm_info->rem_addr) {
2278                 loopbackremotelistener = find_listener(cm_core,
2279                                                        ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2280                                                        NES_CM_LISTENER_ACTIVE_STATE);
2281                 if (loopbackremotelistener == NULL) {
2282                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2283                 } else {
2284                         loopback_cm_info = *cm_info;
2285                         loopback_cm_info.loc_port = cm_info->rem_port;
2286                         loopback_cm_info.rem_port = cm_info->loc_port;
2287                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2288                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2289                                                           &loopback_cm_info, loopbackremotelistener);
2290                         if (!loopbackremotenode) {
2291                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2292                                 return NULL;
2293                         }
2294                         atomic_inc(&cm_loopbacks);
2295                         loopbackremotenode->loopbackpartner = cm_node;
2296                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2297                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2298                         cm_node->loopbackpartner = loopbackremotenode;
2299                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2300                                private_data_len);
2301                         loopbackremotenode->mpa_frame_size = private_data_len;
2302
2303                         /* we are done handling this state. */
2304                         /* set node to a TSA state */
2305                         cm_node->state = NES_CM_STATE_TSA;
2306                         cm_node->tcp_cntxt.rcv_nxt =
2307                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2308                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2309                                 cm_node->tcp_cntxt.loc_seq_num;
2310                         cm_node->tcp_cntxt.max_snd_wnd =
2311                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2312                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2313                                 cm_node->tcp_cntxt.rcv_wnd;
2314                         cm_node->tcp_cntxt.snd_wnd =
2315                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2316                         loopbackremotenode->tcp_cntxt.snd_wnd =
2317                                 cm_node->tcp_cntxt.rcv_wnd;
2318                         cm_node->tcp_cntxt.snd_wscale =
2319                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2320                         loopbackremotenode->tcp_cntxt.snd_wscale =
2321                                 cm_node->tcp_cntxt.rcv_wscale;
2322                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2323                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2324                 }
2325                 return cm_node;
2326         }
2327
2328         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2329         cm_node->mpa_frame_size = private_data_len;
2330
2331         memcpy(start_buff, private_data, private_data_len);
2332
2333         /* send a syn and goto syn sent state */
2334         cm_node->state = NES_CM_STATE_SYN_SENT;
2335         ret = send_syn(cm_node, 0, NULL);
2336
2337         if (ret) {
2338                 /* error in sending the syn free up the cm_node struct */
2339                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2340                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2341                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2342                           cm_node->cm_id);
2343                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2344                 cm_node = NULL;
2345         }
2346
2347         if (cm_node) {
2348                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2349                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2350                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2351                           cm_node->cm_id);
2352         }
2353
2354         return cm_node;
2355 }
2356
2357
2358 /**
2359  * mini_cm_accept - accept a connection
2360  * This function is never called
2361  */
2362 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2363 {
2364         return 0;
2365 }
2366
2367
2368 /**
2369  * mini_cm_reject - reject and teardown a connection
2370  */
2371 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2372 {
2373         int ret = 0;
2374         int err = 0;
2375         int passive_state;
2376         struct nes_cm_event event;
2377         struct iw_cm_id *cm_id = cm_node->cm_id;
2378         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2379
2380         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2381                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2382
2383         if (cm_node->tcp_cntxt.client)
2384                 return ret;
2385         cleanup_retrans_entry(cm_node);
2386
2387         if (!loopback) {
2388                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2389                 if (passive_state == NES_SEND_RESET_EVENT) {
2390                         cm_node->state = NES_CM_STATE_CLOSED;
2391                         rem_ref_cm_node(cm_core, cm_node);
2392                 } else {
2393                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2394                                 rem_ref_cm_node(cm_core, cm_node);
2395                         } else {
2396                                 ret = send_mpa_reject(cm_node);
2397                                 if (ret) {
2398                                         cm_node->state = NES_CM_STATE_CLOSED;
2399                                         err = send_reset(cm_node, NULL);
2400                                         if (err)
2401                                                 WARN_ON(1);
2402                                 } else {
2403                                         cm_id->add_ref(cm_id);
2404                                 }
2405                         }
2406                 }
2407         } else {
2408                 cm_node->cm_id = NULL;
2409                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2410                         rem_ref_cm_node(cm_core, cm_node);
2411                         rem_ref_cm_node(cm_core, loopback);
2412                 } else {
2413                         event.cm_node = loopback;
2414                         event.cm_info.rem_addr = loopback->rem_addr;
2415                         event.cm_info.loc_addr = loopback->loc_addr;
2416                         event.cm_info.rem_port = loopback->rem_port;
2417                         event.cm_info.loc_port = loopback->loc_port;
2418                         event.cm_info.cm_id = loopback->cm_id;
2419                         cm_event_mpa_reject(&event);
2420                         rem_ref_cm_node(cm_core, cm_node);
2421                         loopback->state = NES_CM_STATE_CLOSING;
2422
2423                         cm_id = loopback->cm_id;
2424                         rem_ref_cm_node(cm_core, loopback);
2425                         cm_id->rem_ref(cm_id);
2426                 }
2427         }
2428
2429         return ret;
2430 }
2431
2432
2433 /**
2434  * mini_cm_close
2435  */
2436 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2437 {
2438         int ret = 0;
2439
2440         if (!cm_core || !cm_node)
2441                 return -EINVAL;
2442
2443         switch (cm_node->state) {
2444         case NES_CM_STATE_SYN_RCVD:
2445         case NES_CM_STATE_SYN_SENT:
2446         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2447         case NES_CM_STATE_ESTABLISHED:
2448         case NES_CM_STATE_ACCEPTING:
2449         case NES_CM_STATE_MPAREQ_SENT:
2450         case NES_CM_STATE_MPAREQ_RCVD:
2451                 cleanup_retrans_entry(cm_node);
2452                 send_reset(cm_node, NULL);
2453                 break;
2454         case NES_CM_STATE_CLOSE_WAIT:
2455                 cm_node->state = NES_CM_STATE_LAST_ACK;
2456                 send_fin(cm_node, NULL);
2457                 break;
2458         case NES_CM_STATE_FIN_WAIT1:
2459         case NES_CM_STATE_FIN_WAIT2:
2460         case NES_CM_STATE_LAST_ACK:
2461         case NES_CM_STATE_TIME_WAIT:
2462         case NES_CM_STATE_CLOSING:
2463                 ret = -1;
2464                 break;
2465         case NES_CM_STATE_LISTENING:
2466                 cleanup_retrans_entry(cm_node);
2467                 send_reset(cm_node, NULL);
2468                 break;
2469         case NES_CM_STATE_MPAREJ_RCVD:
2470         case NES_CM_STATE_UNKNOWN:
2471         case NES_CM_STATE_INITED:
2472         case NES_CM_STATE_CLOSED:
2473         case NES_CM_STATE_LISTENER_DESTROYED:
2474                 ret = rem_ref_cm_node(cm_core, cm_node);
2475                 break;
2476         case NES_CM_STATE_TSA:
2477                 if (cm_node->send_entry)
2478                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2479                                "send_entry=%p\n", cm_node->send_entry);
2480                 ret = rem_ref_cm_node(cm_core, cm_node);
2481                 break;
2482         }
2483         return ret;
2484 }
2485
2486
2487 /**
2488  * recv_pkt - recv an ETHERNET packet, and process it through CM
2489  * node state machine
2490  */
2491 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2492                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2493 {
2494         struct nes_cm_node *cm_node = NULL;
2495         struct nes_cm_listener *listener = NULL;
2496         struct iphdr *iph;
2497         struct tcphdr *tcph;
2498         struct nes_cm_info nfo;
2499         int skb_handled = 1;
2500         __be32 tmp_daddr, tmp_saddr;
2501
2502         if (!skb)
2503                 return 0;
2504         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2505                 return 0;
2506
2507         iph = (struct iphdr *)skb->data;
2508         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2509
2510         nfo.loc_addr = ntohl(iph->daddr);
2511         nfo.loc_port = ntohs(tcph->dest);
2512         nfo.rem_addr = ntohl(iph->saddr);
2513         nfo.rem_port = ntohs(tcph->source);
2514
2515         tmp_daddr = cpu_to_be32(iph->daddr);
2516         tmp_saddr = cpu_to_be32(iph->saddr);
2517
2518         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2519                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2520
2521         do {
2522                 cm_node = find_node(cm_core,
2523                                     nfo.rem_port, nfo.rem_addr,
2524                                     nfo.loc_port, nfo.loc_addr);
2525
2526                 if (!cm_node) {
2527                         /* Only type of packet accepted are for */
2528                         /* the PASSIVE open (syn only) */
2529                         if ((!tcph->syn) || (tcph->ack)) {
2530                                 skb_handled = 0;
2531                                 break;
2532                         }
2533                         listener = find_listener(cm_core, nfo.loc_addr,
2534                                                  nfo.loc_port,
2535                                                  NES_CM_LISTENER_ACTIVE_STATE);
2536                         if (!listener) {
2537                                 nfo.cm_id = NULL;
2538                                 nfo.conn_type = 0;
2539                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2540                                 skb_handled = 0;
2541                                 break;
2542                         }
2543                         nfo.cm_id = listener->cm_id;
2544                         nfo.conn_type = listener->conn_type;
2545                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2546                                                listener);
2547                         if (!cm_node) {
2548                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2549                                           "node\n");
2550                                 cm_packets_dropped++;
2551                                 atomic_dec(&listener->ref_count);
2552                                 dev_kfree_skb_any(skb);
2553                                 break;
2554                         }
2555                         if (!tcph->rst && !tcph->fin) {
2556                                 cm_node->state = NES_CM_STATE_LISTENING;
2557                         } else {
2558                                 cm_packets_dropped++;
2559                                 rem_ref_cm_node(cm_core, cm_node);
2560                                 dev_kfree_skb_any(skb);
2561                                 break;
2562                         }
2563                         add_ref_cm_node(cm_node);
2564                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2565                         if (cm_node->nesqp->pau_mode)
2566                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2567                         else {
2568                                 rem_ref_cm_node(cm_core, cm_node);
2569                                 atomic_inc(&cm_accel_dropped_pkts);
2570                                 dev_kfree_skb_any(skb);
2571                         }
2572                         break;
2573                 }
2574                 skb_reset_network_header(skb);
2575                 skb_set_transport_header(skb, sizeof(*tcph));
2576                 skb->len = ntohs(iph->tot_len);
2577                 process_packet(cm_node, skb, cm_core);
2578                 rem_ref_cm_node(cm_core, cm_node);
2579         } while (0);
2580         return skb_handled;
2581 }
2582
2583
2584 /**
2585  * nes_cm_alloc_core - allocate a top level instance of a cm core
2586  */
2587 static struct nes_cm_core *nes_cm_alloc_core(void)
2588 {
2589         struct nes_cm_core *cm_core;
2590
2591         /* setup the CM core */
2592         /* alloc top level core control structure */
2593         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2594         if (!cm_core)
2595                 return NULL;
2596
2597         INIT_LIST_HEAD(&cm_core->connected_nodes);
2598         init_timer(&cm_core->tcp_timer);
2599         cm_core->tcp_timer.function = nes_cm_timer_tick;
2600
2601         cm_core->mtu = NES_CM_DEFAULT_MTU;
2602         cm_core->state = NES_CM_STATE_INITED;
2603         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2604
2605         atomic_set(&cm_core->events_posted, 0);
2606
2607         cm_core->api = &nes_cm_api;
2608
2609         spin_lock_init(&cm_core->ht_lock);
2610         spin_lock_init(&cm_core->listen_list_lock);
2611
2612         INIT_LIST_HEAD(&cm_core->listen_list.list);
2613
2614         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2615
2616         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2617         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2618         cm_core->post_event = nes_cm_post_event;
2619         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2620         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2621
2622         print_core(cm_core);
2623         return cm_core;
2624 }
2625
2626
2627 /**
2628  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2629  */
2630 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2631 {
2632         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2633
2634         if (!cm_core)
2635                 return -EINVAL;
2636
2637         barrier();
2638
2639         if (timer_pending(&cm_core->tcp_timer))
2640                 del_timer(&cm_core->tcp_timer);
2641
2642         destroy_workqueue(cm_core->event_wq);
2643         destroy_workqueue(cm_core->disconn_wq);
2644         nes_debug(NES_DBG_CM, "\n");
2645         kfree(cm_core);
2646
2647         return 0;
2648 }
2649
2650
2651 /**
2652  * mini_cm_get
2653  */
2654 static int mini_cm_get(struct nes_cm_core *cm_core)
2655 {
2656         return cm_core->state;
2657 }
2658
2659
2660 /**
2661  * mini_cm_set
2662  */
2663 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2664 {
2665         int ret = 0;
2666
2667         switch (type) {
2668         case NES_CM_SET_PKT_SIZE:
2669                 cm_core->mtu = value;
2670                 break;
2671         case NES_CM_SET_FREE_PKT_Q_SIZE:
2672                 cm_core->free_tx_pkt_max = value;
2673                 break;
2674         default:
2675                 /* unknown set option */
2676                 ret = -EINVAL;
2677         }
2678
2679         return ret;
2680 }
2681
2682
2683 /**
2684  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2685  * successfully exchanged when this is called
2686  */
2687 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2688 {
2689         int ret = 0;
2690
2691         if (!nesqp)
2692                 return -EINVAL;
2693
2694         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2695                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2696                                                   NES_QPCONTEXT_MISC_DROS);
2697
2698         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2699                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2700
2701         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2702
2703         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2704
2705         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2706                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2707
2708         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2709                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2710                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2711
2712         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2713                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2714                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2715
2716         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2717         nesqp->nesqp_context->ts_recent = 0;
2718         nesqp->nesqp_context->ts_age = 0;
2719         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2720         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2721         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2722         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2723                                                     cm_node->tcp_cntxt.rcv_wscale);
2724         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2725         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2726         nesqp->nesqp_context->srtt = 0;
2727         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2728         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2729         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2730         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2731         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2732         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2733
2734         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2735                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2736                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2737                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2738                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2739                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2740                   le32_to_cpu(nesqp->nesqp_context->misc));
2741         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2742         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2743         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2744
2745         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2746         cm_node->state = NES_CM_STATE_TSA;
2747
2748         return ret;
2749 }
2750
2751
2752 /**
2753  * nes_cm_disconn
2754  */
2755 int nes_cm_disconn(struct nes_qp *nesqp)
2756 {
2757         struct disconn_work *work;
2758
2759         work = kzalloc(sizeof *work, GFP_ATOMIC);
2760         if (!work)
2761                 return -ENOMEM;  /* Timer will clean up */
2762
2763         nes_add_ref(&nesqp->ibqp);
2764         work->nesqp = nesqp;
2765         INIT_WORK(&work->work, nes_disconnect_worker);
2766         queue_work(g_cm_core->disconn_wq, &work->work);
2767         return 0;
2768 }
2769
2770
2771 /**
2772  * nes_disconnect_worker
2773  */
2774 static void nes_disconnect_worker(struct work_struct *work)
2775 {
2776         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2777         struct nes_qp *nesqp = dwork->nesqp;
2778
2779         kfree(dwork);
2780         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2781                   nesqp->last_aeq, nesqp->hwqp.qp_id);
2782         nes_cm_disconn_true(nesqp);
2783         nes_rem_ref(&nesqp->ibqp);
2784 }
2785
2786
2787 /**
2788  * nes_cm_disconn_true
2789  */
2790 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2791 {
2792         unsigned long flags;
2793         int ret = 0;
2794         struct iw_cm_id *cm_id;
2795         struct iw_cm_event cm_event;
2796         struct nes_vnic *nesvnic;
2797         u16 last_ae;
2798         u8 original_hw_tcp_state;
2799         u8 original_ibqp_state;
2800         int disconn_status = 0;
2801         int issue_disconn = 0;
2802         int issue_close = 0;
2803         int issue_flush = 0;
2804         u32 flush_q = NES_CQP_FLUSH_RQ;
2805         struct ib_event ibevent;
2806
2807         if (!nesqp) {
2808                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2809                 return -1;
2810         }
2811
2812         spin_lock_irqsave(&nesqp->lock, flags);
2813         cm_id = nesqp->cm_id;
2814         /* make sure we havent already closed this connection */
2815         if (!cm_id) {
2816                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2817                           nesqp->hwqp.qp_id);
2818                 spin_unlock_irqrestore(&nesqp->lock, flags);
2819                 return -1;
2820         }
2821
2822         nesvnic = to_nesvnic(nesqp->ibqp.device);
2823         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2824
2825         original_hw_tcp_state = nesqp->hw_tcp_state;
2826         original_ibqp_state = nesqp->ibqp_state;
2827         last_ae = nesqp->last_aeq;
2828
2829         if (nesqp->term_flags) {
2830                 issue_disconn = 1;
2831                 issue_close = 1;
2832                 nesqp->cm_id = NULL;
2833                 del_timer(&nesqp->terminate_timer);
2834                 if (nesqp->flush_issued == 0) {
2835                         nesqp->flush_issued = 1;
2836                         issue_flush = 1;
2837                 }
2838         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2839                         ((original_ibqp_state == IB_QPS_RTS) &&
2840                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2841                 issue_disconn = 1;
2842                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2843                         disconn_status = -ECONNRESET;
2844         }
2845
2846         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2847                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2848                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2849                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2850                 issue_close = 1;
2851                 nesqp->cm_id = NULL;
2852                 if (nesqp->flush_issued == 0) {
2853                         nesqp->flush_issued = 1;
2854                         issue_flush = 1;
2855                 }
2856         }
2857
2858         spin_unlock_irqrestore(&nesqp->lock, flags);
2859
2860         if ((issue_flush) && (nesqp->destroyed == 0)) {
2861                 /* Flush the queue(s) */
2862                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2863                         flush_q |= NES_CQP_FLUSH_SQ;
2864                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2865
2866                 if (nesqp->term_flags) {
2867                         ibevent.device = nesqp->ibqp.device;
2868                         ibevent.event = nesqp->terminate_eventtype;
2869                         ibevent.element.qp = &nesqp->ibqp;
2870                         if (nesqp->ibqp.event_handler)
2871                                 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2872                 }
2873         }
2874
2875         if ((cm_id) && (cm_id->event_handler)) {
2876                 if (issue_disconn) {
2877                         atomic_inc(&cm_disconnects);
2878                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2879                         cm_event.status = disconn_status;
2880                         cm_event.local_addr = cm_id->local_addr;
2881                         cm_event.remote_addr = cm_id->remote_addr;
2882                         cm_event.private_data = NULL;
2883                         cm_event.private_data_len = 0;
2884
2885                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2886                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2887                                   "cm_id = %p, refcount = %u.\n",
2888                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2889                                   nesqp->hwqp.sq_tail, cm_id,
2890                                   atomic_read(&nesqp->refcount));
2891
2892                         ret = cm_id->event_handler(cm_id, &cm_event);
2893                         if (ret)
2894                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2895                                           "returned, ret=%d\n", ret);
2896                 }
2897
2898                 if (issue_close) {
2899                         atomic_inc(&cm_closes);
2900                         nes_disconnect(nesqp, 1);
2901
2902                         cm_id->provider_data = nesqp;
2903                         /* Send up the close complete event */
2904                         cm_event.event = IW_CM_EVENT_CLOSE;
2905                         cm_event.status = 0;
2906                         cm_event.provider_data = cm_id->provider_data;
2907                         cm_event.local_addr = cm_id->local_addr;
2908                         cm_event.remote_addr = cm_id->remote_addr;
2909                         cm_event.private_data = NULL;
2910                         cm_event.private_data_len = 0;
2911
2912                         ret = cm_id->event_handler(cm_id, &cm_event);
2913                         if (ret)
2914                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2915
2916                         cm_id->rem_ref(cm_id);
2917                 }
2918         }
2919
2920         return 0;
2921 }
2922
2923
2924 /**
2925  * nes_disconnect
2926  */
2927 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2928 {
2929         int ret = 0;
2930         struct nes_vnic *nesvnic;
2931         struct nes_device *nesdev;
2932         struct nes_ib_device *nesibdev;
2933
2934         nesvnic = to_nesvnic(nesqp->ibqp.device);
2935         if (!nesvnic)
2936                 return -EINVAL;
2937
2938         nesdev = nesvnic->nesdev;
2939         nesibdev = nesvnic->nesibdev;
2940
2941         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2942                         netdev_refcnt_read(nesvnic->netdev));
2943
2944         if (nesqp->active_conn) {
2945
2946                 /* indicate this connection is NOT active */
2947                 nesqp->active_conn = 0;
2948         } else {
2949                 /* Need to free the Last Streaming Mode Message */
2950                 if (nesqp->ietf_frame) {
2951                         if (nesqp->lsmm_mr)
2952                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2953                         pci_free_consistent(nesdev->pcidev,
2954                                             nesqp->private_data_len + nesqp->ietf_frame_size,
2955                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2956                 }
2957         }
2958
2959         /* close the CM node down if it is still active */
2960         if (nesqp->cm_node) {
2961                 nes_debug(NES_DBG_CM, "Call close API\n");
2962
2963                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2964         }
2965
2966         return ret;
2967 }
2968
2969
2970 /**
2971  * nes_accept
2972  */
2973 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2974 {
2975         u64 u64temp;
2976         struct ib_qp *ibqp;
2977         struct nes_qp *nesqp;
2978         struct nes_vnic *nesvnic;
2979         struct nes_device *nesdev;
2980         struct nes_cm_node *cm_node;
2981         struct nes_adapter *adapter;
2982         struct ib_qp_attr attr;
2983         struct iw_cm_event cm_event;
2984         struct nes_hw_qp_wqe *wqe;
2985         struct nes_v4_quad nes_quad;
2986         u32 crc_value;
2987         int ret;
2988         int passive_state;
2989         struct nes_ib_device *nesibdev;
2990         struct ib_mr *ibmr = NULL;
2991         struct ib_phys_buf ibphysbuf;
2992         struct nes_pd *nespd;
2993         u64 tagged_offset;
2994         u8 mpa_frame_offset = 0;
2995         struct ietf_mpa_v2 *mpa_v2_frame;
2996         u8 start_addr = 0;
2997         u8 *start_ptr = &start_addr;
2998         u8 **start_buff = &start_ptr;
2999         u16 buff_len = 0;
3000         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3001         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3002
3003         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3004         if (!ibqp)
3005                 return -EINVAL;
3006
3007         /* get all our handles */
3008         nesqp = to_nesqp(ibqp);
3009         nesvnic = to_nesvnic(nesqp->ibqp.device);
3010         nesdev = nesvnic->nesdev;
3011         adapter = nesdev->nesadapter;
3012
3013         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3014         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3015                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3016                 nesvnic->netdev->name);
3017
3018         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3019                 if (cm_node->loopbackpartner)
3020                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3021                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3022                 return -EINVAL;
3023         }
3024
3025         passive_state = atomic_add_return(1, &cm_node->passive_state);
3026         if (passive_state == NES_SEND_RESET_EVENT) {
3027                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3028                 return -ECONNRESET;
3029         }
3030
3031         /* associate the node with the QP */
3032         nesqp->cm_node = (void *)cm_node;
3033         cm_node->nesqp = nesqp;
3034
3035         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3036                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3037         atomic_inc(&cm_accepts);
3038
3039         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3040                         netdev_refcnt_read(nesvnic->netdev));
3041
3042         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3043         /* allocate the ietf frame and space for private data */
3044         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3045                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3046                                                  &nesqp->ietf_frame_pbase);
3047
3048         if (!nesqp->ietf_frame) {
3049                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3050                 return -ENOMEM;
3051         }
3052         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3053
3054         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3055                 mpa_frame_offset = 4;
3056
3057         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3058                conn_param->private_data_len);
3059
3060         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3061         nesqp->private_data_len = conn_param->private_data_len;
3062
3063         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3064         wqe = &nesqp->hwqp.sq_vbase[0];
3065
3066         if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3067                 u64temp = (unsigned long)nesqp;
3068                 nesibdev = nesvnic->nesibdev;
3069                 nespd = nesqp->nespd;
3070                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3071                 ibphysbuf.size = buff_len;
3072                 tagged_offset = (u64)(unsigned long)*start_buff;
3073                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3074                                                    &ibphysbuf, 1,
3075                                                    IB_ACCESS_LOCAL_WRITE,
3076                                                    &tagged_offset);
3077                 if (!ibmr) {
3078                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3079                                   "for lSMM for cm_node = %p \n",
3080                                   cm_node);
3081                         pci_free_consistent(nesdev->pcidev,
3082                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3083                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3084                         return -ENOMEM;
3085                 }
3086
3087                 ibmr->pd = &nespd->ibpd;
3088                 ibmr->device = nespd->ibpd.device;
3089                 nesqp->lsmm_mr = ibmr;
3090
3091                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3092                 set_wqe_64bit_value(wqe->wqe_words,
3093                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3094                                     u64temp);
3095                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3096                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3097                                     NES_IWARP_SQ_WQE_WRPDU);
3098                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3099                         cpu_to_le32(buff_len);
3100                 set_wqe_64bit_value(wqe->wqe_words,
3101                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3102                                     (u64)(unsigned long)(*start_buff));
3103                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3104                         cpu_to_le32(buff_len);
3105                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3106                 if (nesqp->sq_kmapped) {
3107                         nesqp->sq_kmapped = 0;
3108                         kunmap(nesqp->page);
3109                 }
3110
3111                 nesqp->nesqp_context->ird_ord_sizes |=
3112                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3113                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3114         } else {
3115                 nesqp->nesqp_context->ird_ord_sizes |=
3116                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3117         }
3118         nesqp->skip_lsmm = 1;
3119
3120
3121         /* Cache the cm_id in the qp */
3122         nesqp->cm_id = cm_id;
3123         cm_node->cm_id = cm_id;
3124
3125         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3126         cm_id->provider_data = nesqp;
3127         nesqp->active_conn = 0;
3128
3129         if (cm_node->state == NES_CM_STATE_TSA)
3130                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3131                           cm_node);
3132
3133         nes_cm_init_tsa_conn(nesqp, cm_node);
3134
3135         nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(laddr->sin_port));
3136         nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(raddr->sin_port));
3137
3138         nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(raddr->sin_addr.s_addr));
3139
3140         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3141                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3142                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3143
3144         nesqp->nesqp_context->arp_index_vlan |=
3145                 cpu_to_le32(nes_arp_table(nesdev,
3146                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3147                                           NES_ARP_RESOLVE) << 16);
3148
3149         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3150                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3151
3152         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3153
3154         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3155                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3156         nesqp->nesqp_context->ird_ord_sizes |=
3157                 cpu_to_le32((u32)conn_param->ord);
3158
3159         memset(&nes_quad, 0, sizeof(nes_quad));
3160         nes_quad.DstIpAdrIndex =
3161                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3162         nes_quad.SrcIpadr = raddr->sin_addr.s_addr;
3163         nes_quad.TcpPorts[0] = raddr->sin_port;
3164         nes_quad.TcpPorts[1] = laddr->sin_port;
3165
3166         /* Produce hash key */
3167         crc_value = get_crc_value(&nes_quad);
3168         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3169         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3170                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3171
3172         nesqp->hte_index &= adapter->hte_index_mask;
3173         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3174
3175         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3176
3177         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3178                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3179                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3180                   ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3181                   ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3182                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3183                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3184                   buff_len);
3185
3186         /* notify OF layer that accept event was successful */
3187         cm_id->add_ref(cm_id);
3188         nes_add_ref(&nesqp->ibqp);
3189
3190         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3191         cm_event.status = 0;
3192         cm_event.provider_data = (void *)nesqp;
3193         cm_event.local_addr = cm_id->local_addr;
3194         cm_event.remote_addr = cm_id->remote_addr;
3195         cm_event.private_data = NULL;
3196         cm_event.private_data_len = 0;
3197         ret = cm_id->event_handler(cm_id, &cm_event);
3198         attr.qp_state = IB_QPS_RTS;
3199         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3200         if (cm_node->loopbackpartner) {
3201                 cm_node->loopbackpartner->mpa_frame_size =
3202                         nesqp->private_data_len;
3203                 /* copy entire MPA frame to our cm_node's frame */
3204                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3205                        conn_param->private_data, conn_param->private_data_len);
3206                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3207         }
3208         if (ret)
3209                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3210                        "ret=%d\n", __func__, __LINE__, ret);
3211
3212         return 0;
3213 }
3214
3215
3216 /**
3217  * nes_reject
3218  */
3219 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3220 {
3221         struct nes_cm_node *cm_node;
3222         struct nes_cm_node *loopback;
3223         struct nes_cm_core *cm_core;
3224         u8 *start_buff;
3225
3226         atomic_inc(&cm_rejects);
3227         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3228         loopback = cm_node->loopbackpartner;
3229         cm_core = cm_node->cm_core;
3230         cm_node->cm_id = cm_id;
3231
3232         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3233                 return -EINVAL;
3234
3235         if (loopback) {
3236                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3237                 loopback->mpa_frame.priv_data_len = pdata_len;
3238                 loopback->mpa_frame_size = pdata_len;
3239         } else {
3240                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3241                 cm_node->mpa_frame_size = pdata_len;
3242                 memcpy(start_buff, pdata, pdata_len);
3243         }
3244         return cm_core->api->reject(cm_core, cm_node);
3245 }
3246
3247
3248 /**
3249  * nes_connect
3250  * setup and launch cm connect node
3251  */
3252 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3253 {
3254         struct ib_qp *ibqp;
3255         struct nes_qp *nesqp;
3256         struct nes_vnic *nesvnic;
3257         struct nes_device *nesdev;
3258         struct nes_cm_node *cm_node;
3259         struct nes_cm_info cm_info;
3260         int apbvt_set = 0;
3261         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3262         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3263
3264         if (cm_id->remote_addr.ss_family != AF_INET)
3265                 return -ENOSYS;
3266         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3267         if (!ibqp)
3268                 return -EINVAL;
3269         nesqp = to_nesqp(ibqp);
3270         if (!nesqp)
3271                 return -EINVAL;
3272         nesvnic = to_nesvnic(nesqp->ibqp.device);
3273         if (!nesvnic)
3274                 return -EINVAL;
3275         nesdev = nesvnic->nesdev;
3276         if (!nesdev)
3277                 return -EINVAL;
3278
3279         if (!laddr->sin_port || !raddr->sin_port)
3280                 return -EINVAL;
3281
3282         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3283                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3284                   ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3285                   ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3286                   ntohs(laddr->sin_port));
3287
3288         atomic_inc(&cm_connects);
3289         nesqp->active_conn = 1;
3290
3291         /* cache the cm_id in the qp */
3292         nesqp->cm_id = cm_id;
3293
3294         cm_id->provider_data = nesqp;
3295
3296         nesqp->private_data_len = conn_param->private_data_len;
3297         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3298         /* space for rdma0 read msg */
3299         if (conn_param->ord == 0)
3300                 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(1);
3301
3302         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3303         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3304                   conn_param->private_data_len);
3305
3306         if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3307                 nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3308                                  PCI_FUNC(nesdev->pcidev->devfn),
3309                                  NES_MANAGE_APBVT_ADD);
3310                 apbvt_set = 1;
3311         }
3312
3313         /* set up the connection params for the node */
3314         cm_info.loc_addr = htonl(laddr->sin_addr.s_addr);
3315         cm_info.loc_port = htons(laddr->sin_port);
3316         cm_info.rem_addr = htonl(raddr->sin_addr.s_addr);
3317         cm_info.rem_port = htons(raddr->sin_port);
3318         cm_info.cm_id = cm_id;
3319         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3320
3321         cm_id->add_ref(cm_id);
3322
3323         /* create a connect CM node connection */
3324         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3325                                           conn_param->private_data_len, (void *)conn_param->private_data,
3326                                           &cm_info);
3327         if (!cm_node) {
3328                 if (apbvt_set)
3329                         nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3330                                          PCI_FUNC(nesdev->pcidev->devfn),
3331                                          NES_MANAGE_APBVT_DEL);
3332
3333                 cm_id->rem_ref(cm_id);
3334                 return -ENOMEM;
3335         }
3336
3337         cm_node->apbvt_set = apbvt_set;
3338         nesqp->cm_node = cm_node;
3339         cm_node->nesqp = nesqp;
3340         nes_add_ref(&nesqp->ibqp);
3341
3342         return 0;
3343 }
3344
3345
3346 /**
3347  * nes_create_listen
3348  */
3349 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3350 {
3351         struct nes_vnic *nesvnic;
3352         struct nes_cm_listener *cm_node;
3353         struct nes_cm_info cm_info;
3354         int err;
3355         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3356
3357         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3358                   cm_id, ntohs(laddr->sin_port));
3359
3360         if (cm_id->local_addr.ss_family != AF_INET)
3361                 return -ENOSYS;
3362         nesvnic = to_nesvnic(cm_id->device);
3363         if (!nesvnic)
3364                 return -EINVAL;
3365
3366         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3367                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3368
3369         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3370                         nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3371
3372         /* setup listen params in our api call struct */
3373         cm_info.loc_addr = nesvnic->local_ipaddr;
3374         cm_info.loc_port = laddr->sin_port;
3375         cm_info.backlog = backlog;
3376         cm_info.cm_id = cm_id;
3377
3378         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3379
3380
3381         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3382         if (!cm_node) {
3383                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3384                        __func__, __LINE__);
3385                 return -ENOMEM;
3386         }
3387
3388         cm_id->provider_data = cm_node;
3389
3390         if (!cm_node->reused_node) {
3391                 err = nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3392                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3393                                        NES_MANAGE_APBVT_ADD);
3394                 if (err) {
3395                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3396                                err);
3397                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3398                         return err;
3399                 }
3400                 atomic_inc(&cm_listens_created);
3401         }
3402
3403         cm_id->add_ref(cm_id);
3404         cm_id->provider_data = (void *)cm_node;
3405
3406
3407         return 0;
3408 }
3409
3410
3411 /**
3412  * nes_destroy_listen
3413  */
3414 int nes_destroy_listen(struct iw_cm_id *cm_id)
3415 {
3416         if (cm_id->provider_data)
3417                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3418         else
3419                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3420
3421         cm_id->rem_ref(cm_id);
3422
3423         return 0;
3424 }
3425
3426
3427 /**
3428  * nes_cm_recv
3429  */
3430 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3431 {
3432         int rc = 0;
3433
3434         cm_packets_received++;
3435         if ((g_cm_core) && (g_cm_core->api))
3436                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3437         else
3438                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3439                           " cm is not setup properly.\n");
3440
3441         return rc;
3442 }
3443
3444
3445 /**
3446  * nes_cm_start
3447  * Start and init a cm core module
3448  */
3449 int nes_cm_start(void)
3450 {
3451         nes_debug(NES_DBG_CM, "\n");
3452         /* create the primary CM core, pass this handle to subsequent core inits */
3453         g_cm_core = nes_cm_alloc_core();
3454         if (g_cm_core)
3455                 return 0;
3456         else
3457                 return -ENOMEM;
3458 }
3459
3460
3461 /**
3462  * nes_cm_stop
3463  * stop and dealloc all cm core instances
3464  */
3465 int nes_cm_stop(void)
3466 {
3467         g_cm_core->api->destroy_cm_core(g_cm_core);
3468         return 0;
3469 }
3470
3471
3472 /**
3473  * cm_event_connected
3474  * handle a connected event, setup QPs and HW
3475  */
3476 static void cm_event_connected(struct nes_cm_event *event)
3477 {
3478         struct nes_qp *nesqp;
3479         struct nes_vnic *nesvnic;
3480         struct nes_device *nesdev;
3481         struct nes_cm_node *cm_node;
3482         struct nes_adapter *nesadapter;
3483         struct ib_qp_attr attr;
3484         struct iw_cm_id *cm_id;
3485         struct iw_cm_event cm_event;
3486         struct nes_v4_quad nes_quad;
3487         u32 crc_value;
3488         int ret;
3489         struct sockaddr_in *laddr;
3490         struct sockaddr_in *raddr;
3491         struct sockaddr_in *cm_event_laddr;
3492
3493         /* get all our handles */
3494         cm_node = event->cm_node;
3495         cm_id = cm_node->cm_id;
3496         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3497         nesqp = (struct nes_qp *)cm_id->provider_data;
3498         nesvnic = to_nesvnic(nesqp->ibqp.device);
3499         nesdev = nesvnic->nesdev;
3500         nesadapter = nesdev->nesadapter;
3501         laddr = (struct sockaddr_in *)&cm_id->local_addr;
3502         raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3503         cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3504
3505         if (nesqp->destroyed)
3506                 return;
3507         atomic_inc(&cm_connecteds);
3508         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3509                   " local port 0x%04X. jiffies = %lu.\n",
3510                   nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3511                   ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3512
3513         nes_cm_init_tsa_conn(nesqp, cm_node);
3514
3515         /* set the QP tsa context */
3516         nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(laddr->sin_port));
3517         nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(raddr->sin_port));
3518         nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(raddr->sin_addr.s_addr));
3519
3520         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3521                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3522                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3523         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3524                         nes_arp_table(nesdev,
3525                         le32_to_cpu(nesqp->nesqp_context->ip0),
3526                         NULL, NES_ARP_RESOLVE) << 16);
3527         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3528                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3529         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3530         nesqp->nesqp_context->ird_ord_sizes |=
3531                         cpu_to_le32((u32)1 <<
3532                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3533
3534         /* Adjust tail for not having a LSMM */
3535         /*nesqp->hwqp.sq_tail = 1;*/
3536
3537         build_rdma0_msg(cm_node, &nesqp);
3538
3539         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3540                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3541
3542         memset(&nes_quad, 0, sizeof(nes_quad));
3543
3544         nes_quad.DstIpAdrIndex =
3545                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3546         nes_quad.SrcIpadr = raddr->sin_addr.s_addr;
3547         nes_quad.TcpPorts[0] = raddr->sin_port;
3548         nes_quad.TcpPorts[1] = laddr->sin_port;
3549
3550         /* Produce hash key */
3551         crc_value = get_crc_value(&nes_quad);
3552         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3553         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3554                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3555
3556         nesqp->hte_index &= nesadapter->hte_index_mask;
3557         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3558
3559         nesqp->ietf_frame = &cm_node->mpa_frame;
3560         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3561         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3562
3563         /* notify OF layer we successfully created the requested connection */
3564         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3565         cm_event.status = 0;
3566         cm_event.provider_data = cm_id->provider_data;
3567         cm_event_laddr->sin_family = AF_INET;
3568         cm_event_laddr->sin_port = laddr->sin_port;
3569         cm_event.remote_addr = cm_id->remote_addr;
3570
3571         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3572         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3573         cm_event.ird = cm_node->ird_size;
3574         cm_event.ord = cm_node->ord_size;
3575
3576         cm_event_laddr->sin_addr.s_addr = event->cm_info.rem_addr;
3577         ret = cm_id->event_handler(cm_id, &cm_event);
3578         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3579
3580         if (ret)
3581                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3582                        "ret=%d\n", __func__, __LINE__, ret);
3583         attr.qp_state = IB_QPS_RTS;
3584         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3585
3586         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3587                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3588
3589         return;
3590 }
3591
3592
3593 /**
3594  * cm_event_connect_error
3595  */
3596 static void cm_event_connect_error(struct nes_cm_event *event)
3597 {
3598         struct nes_qp *nesqp;
3599         struct iw_cm_id *cm_id;
3600         struct iw_cm_event cm_event;
3601         /* struct nes_cm_info cm_info; */
3602         int ret;
3603
3604         if (!event->cm_node)
3605                 return;
3606
3607         cm_id = event->cm_node->cm_id;
3608         if (!cm_id)
3609                 return;
3610
3611         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3612         nesqp = cm_id->provider_data;
3613
3614         if (!nesqp)
3615                 return;
3616
3617         /* notify OF layer about this connection error event */
3618         /* cm_id->rem_ref(cm_id); */
3619         nesqp->cm_id = NULL;
3620         cm_id->provider_data = NULL;
3621         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3622         cm_event.status = -ECONNRESET;
3623         cm_event.provider_data = cm_id->provider_data;
3624         cm_event.local_addr = cm_id->local_addr;
3625         cm_event.remote_addr = cm_id->remote_addr;
3626         cm_event.private_data = NULL;
3627         cm_event.private_data_len = 0;
3628
3629 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3630         {
3631                 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3632                                                      &cm_event.local_addr;
3633                 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3634                                                      &cm_event.remote_addr;
3635                 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3636                           cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3637         }
3638 #endif
3639
3640         ret = cm_id->event_handler(cm_id, &cm_event);
3641         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3642         if (ret)
3643                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3644                        "ret=%d\n", __func__, __LINE__, ret);
3645         cm_id->rem_ref(cm_id);
3646
3647         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3648         return;
3649 }
3650
3651
3652 /**
3653  * cm_event_reset
3654  */
3655 static void cm_event_reset(struct nes_cm_event *event)
3656 {
3657         struct nes_qp *nesqp;
3658         struct iw_cm_id *cm_id;
3659         struct iw_cm_event cm_event;
3660         /* struct nes_cm_info cm_info; */
3661         int ret;
3662
3663         if (!event->cm_node)
3664                 return;
3665
3666         if (!event->cm_node->cm_id)
3667                 return;
3668
3669         cm_id = event->cm_node->cm_id;
3670
3671         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3672         nesqp = cm_id->provider_data;
3673         if (!nesqp)
3674                 return;
3675
3676         nesqp->cm_id = NULL;
3677         /* cm_id->provider_data = NULL; */
3678         cm_event.event = IW_CM_EVENT_DISCONNECT;
3679         cm_event.status = -ECONNRESET;
3680         cm_event.provider_data = cm_id->provider_data;
3681         cm_event.local_addr = cm_id->local_addr;
3682         cm_event.remote_addr = cm_id->remote_addr;
3683         cm_event.private_data = NULL;
3684         cm_event.private_data_len = 0;
3685
3686         cm_id->add_ref(cm_id);
3687         ret = cm_id->event_handler(cm_id, &cm_event);
3688         atomic_inc(&cm_closes);
3689         cm_event.event = IW_CM_EVENT_CLOSE;
3690         cm_event.status = 0;
3691         cm_event.provider_data = cm_id->provider_data;
3692         cm_event.local_addr = cm_id->local_addr;
3693         cm_event.remote_addr = cm_id->remote_addr;
3694         cm_event.private_data = NULL;
3695         cm_event.private_data_len = 0;
3696         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3697         ret = cm_id->event_handler(cm_id, &cm_event);
3698
3699         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3700
3701
3702         /* notify OF layer about this connection error event */
3703         cm_id->rem_ref(cm_id);
3704
3705         return;
3706 }
3707
3708
3709 /**
3710  * cm_event_mpa_req
3711  */
3712 static void cm_event_mpa_req(struct nes_cm_event *event)
3713 {
3714         struct iw_cm_id *cm_id;
3715         struct iw_cm_event cm_event;
3716         int ret;
3717         struct nes_cm_node *cm_node;
3718         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3719                                              &cm_event.local_addr;
3720         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3721                                              &cm_event.remote_addr;
3722
3723         cm_node = event->cm_node;
3724         if (!cm_node)
3725                 return;
3726         cm_id = cm_node->cm_id;
3727
3728         atomic_inc(&cm_connect_reqs);
3729         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3730                   cm_node, cm_id, jiffies);
3731
3732         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3733         cm_event.status = 0;
3734         cm_event.provider_data = (void *)cm_node;
3735
3736         cm_event_laddr->sin_family = AF_INET;
3737         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3738         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3739
3740         cm_event_raddr->sin_family = AF_INET;
3741         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3742         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3743         cm_event.private_data = cm_node->mpa_frame_buf;
3744         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3745         cm_event.ird = cm_node->ird_size;
3746         cm_event.ord = cm_node->ord_size;
3747
3748         ret = cm_id->event_handler(cm_id, &cm_event);
3749         if (ret)
3750                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3751                        __func__, __LINE__, ret);
3752         return;
3753 }
3754
3755
3756 static void cm_event_mpa_reject(struct nes_cm_event *event)
3757 {
3758         struct iw_cm_id *cm_id;
3759         struct iw_cm_event cm_event;
3760         struct nes_cm_node *cm_node;
3761         int ret;
3762         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3763                                              &cm_event.local_addr;
3764         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3765                                              &cm_event.remote_addr;
3766
3767         cm_node = event->cm_node;
3768         if (!cm_node)
3769                 return;
3770         cm_id = cm_node->cm_id;
3771
3772         atomic_inc(&cm_connect_reqs);
3773         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3774                   cm_node, cm_id, jiffies);
3775
3776         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3777         cm_event.status = -ECONNREFUSED;
3778         cm_event.provider_data = cm_id->provider_data;
3779
3780         cm_event_laddr->sin_family = AF_INET;
3781         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3782         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3783
3784         cm_event_raddr->sin_family = AF_INET;
3785         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3786         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3787
3788         cm_event.private_data = cm_node->mpa_frame_buf;
3789         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3790
3791         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3792                   "remove_addr=%08x\n",
3793                   cm_event_laddr->sin_addr.s_addr,
3794                   cm_event_raddr->sin_addr.s_addr);
3795
3796         ret = cm_id->event_handler(cm_id, &cm_event);
3797         if (ret)
3798                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3799                        __func__, __LINE__, ret);
3800
3801         return;
3802 }
3803
3804
3805 static void nes_cm_event_handler(struct work_struct *);
3806
3807 /**
3808  * nes_cm_post_event
3809  * post an event to the cm event handler
3810  */
3811 static int nes_cm_post_event(struct nes_cm_event *event)
3812 {
3813         atomic_inc(&event->cm_node->cm_core->events_posted);
3814         add_ref_cm_node(event->cm_node);
3815         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3816         INIT_WORK(&event->event_work, nes_cm_event_handler);
3817         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3818                   event->cm_node, event);
3819
3820         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3821
3822         nes_debug(NES_DBG_CM, "Exit\n");
3823         return 0;
3824 }
3825
3826
3827 /**
3828  * nes_cm_event_handler
3829  * worker function to handle cm events
3830  * will free instance of nes_cm_event
3831  */
3832 static void nes_cm_event_handler(struct work_struct *work)
3833 {
3834         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3835                                                   event_work);
3836         struct nes_cm_core *cm_core;
3837
3838         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3839                 return;
3840
3841         cm_core = event->cm_node->cm_core;
3842         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3843                   event, event->type, atomic_read(&cm_core->events_posted));
3844
3845         switch (event->type) {
3846         case NES_CM_EVENT_MPA_REQ:
3847                 cm_event_mpa_req(event);
3848                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3849                           event->cm_node);
3850                 break;
3851         case NES_CM_EVENT_RESET:
3852                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3853                           event->cm_node);
3854                 cm_event_reset(event);
3855                 break;
3856         case NES_CM_EVENT_CONNECTED:
3857                 if ((!event->cm_node->cm_id) ||
3858                     (event->cm_node->state != NES_CM_STATE_TSA))
3859                         break;
3860                 cm_event_connected(event);
3861                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3862                 break;
3863         case NES_CM_EVENT_MPA_REJECT:
3864                 if ((!event->cm_node->cm_id) ||
3865                     (event->cm_node->state == NES_CM_STATE_TSA))
3866                         break;
3867                 cm_event_mpa_reject(event);
3868                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3869                 break;
3870
3871         case NES_CM_EVENT_ABORTED:
3872                 if ((!event->cm_node->cm_id) ||
3873                     (event->cm_node->state == NES_CM_STATE_TSA))
3874                         break;
3875                 cm_event_connect_error(event);
3876                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3877                 break;
3878         case NES_CM_EVENT_DROPPED_PKT:
3879                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3880                 break;
3881         default:
3882                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3883                 break;
3884         }
3885
3886         atomic_dec(&cm_core->events_posted);
3887         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3888         rem_ref_cm_node(cm_core, event->cm_node);
3889         kfree(event);
3890
3891         return;
3892 }