drivers/infiniband/hw/nes/nes_cm.c

   1 /*
   2  * Copyright (c) 2006 - 2014 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 #include <linux/fcntl.h>
  63
  64 #include "nes.h"
  65
  66 u32 cm_packets_sent;
  67 u32 cm_packets_bounced;
  68 u32 cm_packets_dropped;
  69 u32 cm_packets_retrans;
  70 u32 cm_packets_created;
  71 u32 cm_packets_received;
  72 atomic_t cm_listens_created;
  73 atomic_t cm_listens_destroyed;
  74 u32 cm_backlog_drops;
  75 atomic_t cm_loopbacks;
  76 atomic_t cm_nodes_created;
  77 atomic_t cm_nodes_destroyed;
  78 atomic_t cm_accel_dropped_pkts;
  79 atomic_t cm_resets_recvd;
  80
  81 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
  82 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
  83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
  84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
  85 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
  86 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
  87 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
  88 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
  89 static int mini_cm_dealloc_core(struct nes_cm_core *);
  90 static int mini_cm_get(struct nes_cm_core *);
  91 static int mini_cm_set(struct nes_cm_core *, u32, u32);
  92
  93 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
  94 static int add_ref_cm_node(struct nes_cm_node *);
  95 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
  96
  97 static int nes_cm_disconn_true(struct nes_qp *);
  98 static int nes_cm_post_event(struct nes_cm_event *event);
  99 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
 100 static void nes_disconnect_worker(struct work_struct *work);
 101
 102 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
 103 static int send_mpa_reject(struct nes_cm_node *);
 104 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
 105 static int send_reset(struct nes_cm_node *, struct sk_buff *);
 106 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
 107 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
 108 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
 109
 110 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
 111 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
 112 static void cleanup_retrans_entry(struct nes_cm_node *);
 113 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
 114 static void free_retrans_entry(struct nes_cm_node *cm_node);
 115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
 116
 117 /* CM event handler functions */
 118 static void cm_event_connected(struct nes_cm_event *);
 119 static void cm_event_connect_error(struct nes_cm_event *);
 120 static void cm_event_reset(struct nes_cm_event *);
 121 static void cm_event_mpa_req(struct nes_cm_event *);
 122 static void cm_event_mpa_reject(struct nes_cm_event *);
 123 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
 124
 125 /* MPA build functions */
 126 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
 127 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
 128 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
 129 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
 130
 131 static void print_core(struct nes_cm_core *core);
 132 static void record_ird_ord(struct nes_cm_node *, u16, u16);
 133
 134 /* External CM API Interface */
 135 /* instance of function pointers for client API */
 136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
 137 static struct nes_cm_ops nes_cm_api = {
 138         mini_cm_accelerated,
 139         mini_cm_listen,
 140         mini_cm_del_listen,
 141         mini_cm_connect,
 142         mini_cm_close,
 143         mini_cm_accept,
 144         mini_cm_reject,
 145         mini_cm_recv_pkt,
 146         mini_cm_dealloc_core,
 147         mini_cm_get,
 148         mini_cm_set
 149 };
 150
 151 static struct nes_cm_core *g_cm_core;
 152
 153 atomic_t cm_connects;
 154 atomic_t cm_accepts;
 155 atomic_t cm_disconnects;
 156 atomic_t cm_closes;
 157 atomic_t cm_connecteds;
 158 atomic_t cm_connect_reqs;
 159 atomic_t cm_rejects;
 160
 161 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
 162 {
 163         return add_ref_cm_node(cm_node);
 164 }
 165
 166 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
 167 {
 168         return rem_ref_cm_node(cm_node->cm_core, cm_node);
 169 }
 170 /**
 171  * create_event
 172  */
 173 static struct nes_cm_event *create_event(struct nes_cm_node *   cm_node,
 174                                          enum nes_cm_event_type type)
 175 {
 176         struct nes_cm_event *event;
 177
 178         if (!cm_node->cm_id)
 179                 return NULL;
 180
 181         /* allocate an empty event */
 182         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 183
 184         if (!event)
 185                 return NULL;
 186
 187         event->type = type;
 188         event->cm_node = cm_node;
 189         event->cm_info.rem_addr = cm_node->rem_addr;
 190         event->cm_info.loc_addr = cm_node->loc_addr;
 191         event->cm_info.rem_port = cm_node->rem_port;
 192         event->cm_info.loc_port = cm_node->loc_port;
 193         event->cm_info.cm_id = cm_node->cm_id;
 194
 195         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
 196                   "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
 197                   cm_node, event, type, event->cm_info.loc_addr,
 198                   event->cm_info.loc_port, event->cm_info.rem_addr,
 199                   event->cm_info.rem_port);
 200
 201         nes_cm_post_event(event);
 202         return event;
 203 }
 204
 205
 206 /**
 207  * send_mpa_request
 208  */
 209 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
 210 {
 211         u8 start_addr = 0;
 212         u8 *start_ptr = &start_addr;
 213         u8 **start_buff = &start_ptr;
 214         u16 buff_len = 0;
 215
 216         if (!skb) {
 217                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
 218                 return -1;
 219         }
 220
 221         /* send an MPA Request frame */
 222         cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
 223         form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
 224
 225         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 226 }
 227
 228
 229
 230 static int send_mpa_reject(struct nes_cm_node *cm_node)
 231 {
 232         struct sk_buff *skb = NULL;
 233         u8 start_addr = 0;
 234         u8 *start_ptr = &start_addr;
 235         u8 **start_buff = &start_ptr;
 236         u16 buff_len = 0;
 237         struct ietf_mpa_v1 *mpa_frame;
 238
 239         skb = dev_alloc_skb(MAX_CM_BUFFER);
 240         if (!skb) {
 241                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 242                 return -ENOMEM;
 243         }
 244
 245         /* send an MPA reject frame */
 246         cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
 247         mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
 248         mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
 249         form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
 250
 251         cm_node->state = NES_CM_STATE_FIN_WAIT1;
 252         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 253 }
 254
 255
 256 /**
 257  * recv_mpa - process a received TCP pkt, we are expecting an
 258  * IETF MPA frame
 259  */
 260 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
 261                      u32 len)
 262 {
 263         struct ietf_mpa_v1 *mpa_frame;
 264         struct ietf_mpa_v2 *mpa_v2_frame;
 265         struct ietf_rtr_msg *rtr_msg;
 266         int mpa_hdr_len;
 267         int priv_data_len;
 268
 269         *type = NES_MPA_REQUEST_ACCEPT;
 270
 271         /* assume req frame is in tcp data payload */
 272         if (len < sizeof(struct ietf_mpa_v1)) {
 273                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
 274                 return -EINVAL;
 275         }
 276
 277         /* points to the beginning of the frame, which could be MPA V1 or V2 */
 278         mpa_frame = (struct ietf_mpa_v1 *)buffer;
 279         mpa_hdr_len = sizeof(struct ietf_mpa_v1);
 280         priv_data_len = ntohs(mpa_frame->priv_data_len);
 281
 282         /* make sure mpa private data len is less than 512 bytes */
 283         if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
 284                 nes_debug(NES_DBG_CM, "The received Length of Private"
 285                           " Data field exceeds 512 octets\n");
 286                 return -EINVAL;
 287         }
 288         /*
 289          * make sure MPA receiver interoperate with the
 290          * received MPA version and MPA key information
 291          *
 292          */
 293         if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
 294                 nes_debug(NES_DBG_CM, "The received mpa version"
 295                           " is not supported\n");
 296                 return -EINVAL;
 297         }
 298         /*
 299         * backwards compatibility only
 300         */
 301         if (mpa_frame->rev > cm_node->mpa_frame_rev) {
 302                 nes_debug(NES_DBG_CM, "The received mpa version"
 303                         " can not be interoperated\n");
 304                 return -EINVAL;
 305         } else {
 306                 cm_node->mpa_frame_rev = mpa_frame->rev;
 307         }
 308
 309         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 310                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 311                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 312                         return -EINVAL;
 313                 }
 314         } else {
 315                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 316                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 317                         return -EINVAL;
 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                 if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD)
 360                         cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD;
 361
 362                 if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) {
 363                         /* responder */
 364                         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 365                                 /* we are still negotiating */
 366                                 if (ord_size > NES_MAX_IRD) {
 367                                         cm_node->ird_size = NES_MAX_IRD;
 368                                 } else {
 369                                         cm_node->ird_size = ord_size;
 370                                         if (ord_size == 0 &&
 371                                         (rtr_ctrl_ord & IETF_RDMA0_READ)) {
 372                                                 cm_node->ird_size = 1;
 373                                                 nes_debug(NES_DBG_CM,
 374                                                 "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n",
 375                                                         __func__, ord_size);
 376                                         }
 377                                 }
 378                                 if (ird_size > NES_MAX_ORD)
 379                                         cm_node->ord_size = NES_MAX_ORD;
 380                                 else
 381                                         cm_node->ord_size = ird_size;
 382                         } else { /* initiator */
 383                                 if (ord_size > NES_MAX_IRD) {
 384                                         nes_debug(NES_DBG_CM,
 385                                         "%s: Unable to support the requested (ord =%u)\n",
 386                                                         __func__, ord_size);
 387                                         return -EINVAL;
 388                                 }
 389                                 cm_node->ird_size = ord_size;
 390
 391                                 if (ird_size > NES_MAX_ORD) {
 392                                         cm_node->ord_size = NES_MAX_ORD;
 393                                 } else {
 394                                         if (ird_size == 0 &&
 395                                         (rtr_ctrl_ord & IETF_RDMA0_READ)) {
 396                                                 nes_debug(NES_DBG_CM,
 397                                                 "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n",
 398                                                         __func__, ird_size);
 399                                                 return -EINVAL;
 400                                         } else {
 401                                                 cm_node->ord_size = ird_size;
 402                                         }
 403                                 }
 404                         }
 405                 }
 406
 407                 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
 408                         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
 409
 410                 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
 411                         cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
 412                 } else {        /* Not supported RDMA0 operation */
 413                         return -EINVAL;
 414                 }
 415                 break;
 416         }
 417         case IETF_MPA_V1:
 418         default:
 419                 break;
 420         }
 421
 422         /* copy entire MPA frame to our cm_node's frame */
 423         memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
 424
 425         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
 426                 *type = NES_MPA_REQUEST_REJECT;
 427         return 0;
 428 }
 429
 430
 431 /**
 432  * form_cm_frame - get a free packet and build empty frame Use
 433  * node info to build.
 434  */
 435 static void form_cm_frame(struct sk_buff *skb,
 436                           struct nes_cm_node *cm_node, void *options, u32 optionsize,
 437                           void *data, u32 datasize, u8 flags)
 438 {
 439         struct tcphdr *tcph;
 440         struct iphdr *iph;
 441         struct ethhdr *ethh;
 442         u8 *buf;
 443         u16 packetsize = sizeof(*iph);
 444
 445         packetsize += sizeof(*tcph);
 446         packetsize += optionsize + datasize;
 447
 448         skb_trim(skb, 0);
 449         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
 450
 451         buf = skb_put(skb, packetsize + ETH_HLEN);
 452
 453         ethh = (struct ethhdr *)buf;
 454         buf += ETH_HLEN;
 455
 456         iph = (struct iphdr *)buf;
 457         buf += sizeof(*iph);
 458         tcph = (struct tcphdr *)buf;
 459         skb_reset_mac_header(skb);
 460         skb_set_network_header(skb, ETH_HLEN);
 461         skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
 462         buf += sizeof(*tcph);
 463
 464         skb->ip_summed = CHECKSUM_PARTIAL;
 465         if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
 466                 skb->ip_summed = CHECKSUM_NONE;
 467         skb->protocol = htons(0x800);
 468         skb->data_len = 0;
 469         skb->mac_len = ETH_HLEN;
 470
 471         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 472         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 473         ethh->h_proto = htons(0x0800);
 474
 475         iph->version = IPVERSION;
 476         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 477         iph->tos = 0;
 478         iph->tot_len = htons(packetsize);
 479         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 480
 481         iph->frag_off = htons(0x4000);
 482         iph->ttl = 0x40;
 483         iph->protocol = 0x06;   /* IPPROTO_TCP */
 484
 485         iph->saddr = htonl(cm_node->mapped_loc_addr);
 486         iph->daddr = htonl(cm_node->mapped_rem_addr);
 487
 488         tcph->source = htons(cm_node->mapped_loc_port);
 489         tcph->dest = htons(cm_node->mapped_rem_port);
 490         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 491
 492         if (flags & SET_ACK) {
 493                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 494                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 495                 tcph->ack = 1;
 496         } else {
 497                 tcph->ack_seq = 0;
 498         }
 499
 500         if (flags & SET_SYN) {
 501                 cm_node->tcp_cntxt.loc_seq_num++;
 502                 tcph->syn = 1;
 503         } else {
 504                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 505         }
 506
 507         if (flags & SET_FIN) {
 508                 cm_node->tcp_cntxt.loc_seq_num++;
 509                 tcph->fin = 1;
 510         }
 511
 512         if (flags & SET_RST)
 513                 tcph->rst = 1;
 514
 515         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 516         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 517         tcph->urg_ptr = 0;
 518         if (optionsize)
 519                 memcpy(buf, options, optionsize);
 520         buf += optionsize;
 521         if (datasize)
 522                 memcpy(buf, data, datasize);
 523
 524         skb_shinfo(skb)->nr_frags = 0;
 525         cm_packets_created++;
 526 }
 527
 528 /*
 529  * nes_create_sockaddr - Record ip addr and tcp port in a sockaddr struct
 530  */
 531 static void nes_create_sockaddr(__be32 ip_addr, __be16 port,
 532                                 struct sockaddr_storage *addr)
 533 {
 534         struct sockaddr_in *nes_sockaddr = (struct sockaddr_in *)addr;
 535         nes_sockaddr->sin_family = AF_INET;
 536         memcpy(&nes_sockaddr->sin_addr.s_addr, &ip_addr, sizeof(__be32));
 537         nes_sockaddr->sin_port = port;
 538 }
 539
 540 /*
 541  * nes_create_mapinfo - Create a mapinfo object in the port mapper data base
 542  */
 543 static int nes_create_mapinfo(struct nes_cm_info *cm_info)
 544 {
 545         struct sockaddr_storage local_sockaddr;
 546         struct sockaddr_storage mapped_sockaddr;
 547
 548         nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
 549                                 &local_sockaddr);
 550         nes_create_sockaddr(htonl(cm_info->mapped_loc_addr),
 551                         htons(cm_info->mapped_loc_port), &mapped_sockaddr);
 552
 553         return iwpm_create_mapinfo(&local_sockaddr,
 554                                 &mapped_sockaddr, RDMA_NL_NES);
 555 }
 556
 557 /*
 558  * nes_remove_mapinfo - Remove a mapinfo object from the port mapper data base
 559  *                      and send a remove mapping op message to
 560  *                      the userspace port mapper
 561  */
 562 static int nes_remove_mapinfo(u32 loc_addr, u16 loc_port,
 563                         u32 mapped_loc_addr, u16 mapped_loc_port)
 564 {
 565         struct sockaddr_storage local_sockaddr;
 566         struct sockaddr_storage mapped_sockaddr;
 567
 568         nes_create_sockaddr(htonl(loc_addr), htons(loc_port), &local_sockaddr);
 569         nes_create_sockaddr(htonl(mapped_loc_addr), htons(mapped_loc_port),
 570                                 &mapped_sockaddr);
 571
 572         iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr);
 573         return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_NES);
 574 }
 575
 576 /*
 577  * nes_form_pm_msg - Form a port mapper message with mapping info
 578  */
 579 static void nes_form_pm_msg(struct nes_cm_info *cm_info,
 580                                 struct iwpm_sa_data *pm_msg)
 581 {
 582         nes_create_sockaddr(htonl(cm_info->loc_addr), htons(cm_info->loc_port),
 583                                 &pm_msg->loc_addr);
 584         nes_create_sockaddr(htonl(cm_info->rem_addr), htons(cm_info->rem_port),
 585                                 &pm_msg->rem_addr);
 586 }
 587
 588 /*
 589  * nes_form_reg_msg - Form a port mapper message with dev info
 590  */
 591 static void nes_form_reg_msg(struct nes_vnic *nesvnic,
 592                         struct iwpm_dev_data *pm_msg)
 593 {
 594         memcpy(pm_msg->dev_name, nesvnic->nesibdev->ibdev.name,
 595                                 IWPM_DEVNAME_SIZE);
 596         memcpy(pm_msg->if_name, nesvnic->netdev->name, IWPM_IFNAME_SIZE);
 597 }
 598
 599 static void record_sockaddr_info(struct sockaddr_storage *addr_info,
 600                                         nes_addr_t *ip_addr, u16 *port_num)
 601 {
 602         struct sockaddr_in *in_addr = (struct sockaddr_in *)addr_info;
 603
 604         if (in_addr->sin_family == AF_INET) {
 605                 *ip_addr = ntohl(in_addr->sin_addr.s_addr);
 606                 *port_num = ntohs(in_addr->sin_port);
 607         }
 608 }
 609
 610 /*
 611  * nes_record_pm_msg - Save the received mapping info
 612  */
 613 static void nes_record_pm_msg(struct nes_cm_info *cm_info,
 614                         struct iwpm_sa_data *pm_msg)
 615 {
 616         record_sockaddr_info(&pm_msg->mapped_loc_addr,
 617                 &cm_info->mapped_loc_addr, &cm_info->mapped_loc_port);
 618
 619         record_sockaddr_info(&pm_msg->mapped_rem_addr,
 620                 &cm_info->mapped_rem_addr, &cm_info->mapped_rem_port);
 621 }
 622
 623 /*
 624  * nes_get_reminfo - Get the address info of the remote connecting peer
 625  */
 626 static int nes_get_remote_addr(struct nes_cm_node *cm_node)
 627 {
 628         struct sockaddr_storage mapped_loc_addr, mapped_rem_addr;
 629         struct sockaddr_storage remote_addr;
 630         int ret;
 631
 632         nes_create_sockaddr(htonl(cm_node->mapped_loc_addr),
 633                         htons(cm_node->mapped_loc_port), &mapped_loc_addr);
 634         nes_create_sockaddr(htonl(cm_node->mapped_rem_addr),
 635                         htons(cm_node->mapped_rem_port), &mapped_rem_addr);
 636
 637         ret = iwpm_get_remote_info(&mapped_loc_addr, &mapped_rem_addr,
 638                                 &remote_addr, RDMA_NL_NES);
 639         if (ret)
 640                 nes_debug(NES_DBG_CM, "Unable to find remote peer address info\n");
 641         else
 642                 record_sockaddr_info(&remote_addr, &cm_node->rem_addr,
 643                                 &cm_node->rem_port);
 644         return ret;
 645 }
 646
 647 /**
 648  * print_core - dump a cm core
 649  */
 650 static void print_core(struct nes_cm_core *core)
 651 {
 652         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 653         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 654         if (!core)
 655                 return;
 656         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 657
 658         nes_debug(NES_DBG_CM, "State         : %u \n", core->state);
 659
 660         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 661         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 662
 663         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 664
 665         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 666 }
 667
 668 static void record_ird_ord(struct nes_cm_node *cm_node,
 669                                         u16 conn_ird, u16 conn_ord)
 670 {
 671         if (conn_ird > NES_MAX_IRD)
 672                 conn_ird = NES_MAX_IRD;
 673
 674         if (conn_ord > NES_MAX_ORD)
 675                 conn_ord = NES_MAX_ORD;
 676
 677         cm_node->ird_size = conn_ird;
 678         cm_node->ord_size = conn_ord;
 679 }
 680
 681 /**
 682  * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
 683  */
 684 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
 685                               u16 *buff_len, u8 *pci_mem, u8 mpa_key)
 686 {
 687         int ret = 0;
 688
 689         *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
 690
 691         switch (cm_node->mpa_frame_rev) {
 692         case IETF_MPA_V1:
 693                 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
 694                 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
 695                 build_mpa_v1(cm_node, *start_buff, mpa_key);
 696                 break;
 697         case IETF_MPA_V2:
 698                 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
 699                 build_mpa_v2(cm_node, *start_buff, mpa_key);
 700                 break;
 701         default:
 702                 ret = -EINVAL;
 703         }
 704         return ret;
 705 }
 706
 707 /**
 708  * build_mpa_v2 - build a MPA V2 frame
 709  */
 710 static void build_mpa_v2(struct nes_cm_node *cm_node,
 711                          void *start_addr, u8 mpa_key)
 712 {
 713         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
 714         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
 715         u16 ctrl_ird;
 716         u16 ctrl_ord;
 717
 718         /* initialize the upper 5 bytes of the frame */
 719         build_mpa_v1(cm_node, start_addr, mpa_key);
 720         mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
 721         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 722
 723         /* initialize RTR msg */
 724         if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
 725                 ctrl_ird = IETF_NO_IRD_ORD;
 726                 ctrl_ord = IETF_NO_IRD_ORD;
 727         } else {
 728                 ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD;
 729                 ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD;
 730         }
 731         ctrl_ird |= IETF_PEER_TO_PEER;
 732         ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 733
 734         switch (mpa_key) {
 735         case MPA_KEY_REQUEST:
 736                 ctrl_ord |= IETF_RDMA0_WRITE;
 737                 ctrl_ord |= IETF_RDMA0_READ;
 738                 break;
 739         case MPA_KEY_REPLY:
 740                 switch (cm_node->send_rdma0_op) {
 741                 case SEND_RDMA_WRITE_ZERO:
 742                         ctrl_ord |= IETF_RDMA0_WRITE;
 743                         break;
 744                 case SEND_RDMA_READ_ZERO:
 745                         ctrl_ord |= IETF_RDMA0_READ;
 746                         break;
 747                 }
 748         }
 749         rtr_msg->ctrl_ird = htons(ctrl_ird);
 750         rtr_msg->ctrl_ord = htons(ctrl_ord);
 751 }
 752
 753 /**
 754  * build_mpa_v1 - build a MPA V1 frame
 755  */
 756 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
 757 {
 758         struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
 759
 760         switch (mpa_key) {
 761         case MPA_KEY_REQUEST:
 762                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
 763                 break;
 764         case MPA_KEY_REPLY:
 765                 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
 766                 break;
 767         }
 768         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
 769         mpa_frame->rev = cm_node->mpa_frame_rev;
 770         mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
 771 }
 772
 773 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
 774 {
 775         u64 u64temp;
 776         struct nes_qp *nesqp = *nesqp_addr;
 777         struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
 778
 779         u64temp = (unsigned long)nesqp->nesuqp_addr;
 780         u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
 781         set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
 782
 783         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
 784         wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
 785
 786         switch (cm_node->send_rdma0_op) {
 787         case SEND_RDMA_WRITE_ZERO:
 788                 nes_debug(NES_DBG_CM, "Sending first write.\n");
 789                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
 790                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
 791                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
 792                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
 793                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
 794                 break;
 795
 796         case SEND_RDMA_READ_ZERO:
 797         default:
 798                 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
 799                         WARN(1, "Unsupported RDMA0 len operation=%u\n",
 800                              cm_node->send_rdma0_op);
 801                 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
 802                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
 803                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
 804                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
 805                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
 806                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
 807                 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
 808                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
 809                 break;
 810         }
 811
 812         if (nesqp->sq_kmapped) {
 813                 nesqp->sq_kmapped = 0;
 814                 kunmap(nesqp->page);
 815         }
 816
 817         /*use the reserved spot on the WQ for the extra first WQE*/
 818         nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
 819                                                              NES_QPCONTEXT_ORDIRD_WRPDU |
 820                                                              NES_QPCONTEXT_ORDIRD_ALSMM));
 821         nesqp->skip_lsmm = 1;
 822         nesqp->hwqp.sq_tail = 0;
 823 }
 824
 825 /**
 826  * schedule_nes_timer
 827  * note - cm_node needs to be protected before calling this. Encase in:
 828  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
 829  */
 830 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 831                        enum nes_timer_type type, int send_retrans,
 832                        int close_when_complete)
 833 {
 834         unsigned long flags;
 835         struct nes_cm_core *cm_core = cm_node->cm_core;
 836         struct nes_timer_entry *new_send;
 837         int ret = 0;
 838
 839         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 840         if (!new_send)
 841                 return -ENOMEM;
 842
 843         /* new_send->timetosend = currenttime */
 844         new_send->retrycount = NES_DEFAULT_RETRYS;
 845         new_send->retranscount = NES_DEFAULT_RETRANS;
 846         new_send->skb = skb;
 847         new_send->timetosend = jiffies;
 848         new_send->type = type;
 849         new_send->netdev = cm_node->netdev;
 850         new_send->send_retrans = send_retrans;
 851         new_send->close_when_complete = close_when_complete;
 852
 853         if (type == NES_TIMER_TYPE_CLOSE) {
 854                 new_send->timetosend += (HZ / 10);
 855                 if (cm_node->recv_entry) {
 856                         kfree(new_send);
 857                         WARN_ON(1);
 858                         return -EINVAL;
 859                 }
 860                 cm_node->recv_entry = new_send;
 861         }
 862
 863         if (type == NES_TIMER_TYPE_SEND) {
 864                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 865                 atomic_inc(&new_send->skb->users);
 866                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 867                 cm_node->send_entry = new_send;
 868                 add_ref_cm_node(cm_node);
 869                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 870                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 871
 872                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 873                 if (ret != NETDEV_TX_OK) {
 874                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 875                                   "(jiffies = %lu)\n", new_send, jiffies);
 876                         new_send->timetosend = jiffies;
 877                         ret = NETDEV_TX_OK;
 878                 } else {
 879                         cm_packets_sent++;
 880                         if (!send_retrans) {
 881                                 cleanup_retrans_entry(cm_node);
 882                                 if (close_when_complete)
 883                                         rem_ref_cm_node(cm_core, cm_node);
 884                                 return ret;
 885                         }
 886                 }
 887         }
 888
 889         if (!timer_pending(&cm_core->tcp_timer))
 890                 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
 891
 892         return ret;
 893 }
 894
 895 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 896 {
 897         struct iw_cm_id *cm_id = cm_node->cm_id;
 898         enum nes_cm_node_state state = cm_node->state;
 899         cm_node->state = NES_CM_STATE_CLOSED;
 900
 901         switch (state) {
 902         case NES_CM_STATE_SYN_RCVD:
 903         case NES_CM_STATE_CLOSING:
 904                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 905                 break;
 906         case NES_CM_STATE_LAST_ACK:
 907         case NES_CM_STATE_FIN_WAIT1:
 908                 if (cm_node->cm_id)
 909                         cm_id->rem_ref(cm_id);
 910                 send_reset(cm_node, NULL);
 911                 break;
 912         default:
 913                 add_ref_cm_node(cm_node);
 914                 send_reset(cm_node, NULL);
 915                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 916         }
 917 }
 918
 919 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 920 {
 921         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 922         struct iw_cm_id *cm_id = cm_node->cm_id;
 923         struct nes_qp *nesqp;
 924         unsigned long qplockflags;
 925
 926         if (!recv_entry)
 927                 return;
 928         nesqp = (struct nes_qp *)recv_entry->skb;
 929         if (nesqp) {
 930                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 931                 if (nesqp->cm_id) {
 932                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 933                                   "refcount = %d: HIT A "
 934                                   "NES_TIMER_TYPE_CLOSE with something "
 935                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 936                                   atomic_read(&nesqp->refcount));
 937                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 938                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 939                         nesqp->ibqp_state = IB_QPS_ERR;
 940                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 941                         nes_cm_disconn(nesqp);
 942                 } else {
 943                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 944                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 945                                   "refcount = %d: HIT A "
 946                                   "NES_TIMER_TYPE_CLOSE with nothing "
 947                                   "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 948                                   atomic_read(&nesqp->refcount));
 949                 }
 950         } else if (rem_node) {
 951                 /* TIME_WAIT state */
 952                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 953         }
 954         if (cm_node->cm_id)
 955                 cm_id->rem_ref(cm_id);
 956         kfree(recv_entry);
 957         cm_node->recv_entry = NULL;
 958 }
 959
 960 /**
 961  * nes_cm_timer_tick
 962  */
 963 static void nes_cm_timer_tick(unsigned long pass)
 964 {
 965         unsigned long flags;
 966         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 967         struct nes_cm_node *cm_node;
 968         struct nes_timer_entry *send_entry, *recv_entry;
 969         struct list_head *list_core_temp;
 970         struct list_head *list_node;
 971         struct nes_cm_core *cm_core = g_cm_core;
 972         u32 settimer = 0;
 973         unsigned long timetosend;
 974         int ret = NETDEV_TX_OK;
 975
 976         struct list_head timer_list;
 977
 978         INIT_LIST_HEAD(&timer_list);
 979         spin_lock_irqsave(&cm_core->ht_lock, flags);
 980
 981         list_for_each_safe(list_node, list_core_temp,
 982                            &cm_core->connected_nodes) {
 983                 cm_node = container_of(list_node, struct nes_cm_node, list);
 984                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 985                         add_ref_cm_node(cm_node);
 986                         list_add(&cm_node->timer_entry, &timer_list);
 987                 }
 988         }
 989         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 990
 991         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 992                 cm_node = container_of(list_node, struct nes_cm_node,
 993                                        timer_entry);
 994                 recv_entry = cm_node->recv_entry;
 995
 996                 if (recv_entry) {
 997                         if (time_after(recv_entry->timetosend, jiffies)) {
 998                                 if (nexttimeout > recv_entry->timetosend ||
 999                                     !settimer) {
1000                                         nexttimeout = recv_entry->timetosend;
1001                                         settimer = 1;
1002                                 }
1003                         } else {
1004                                 handle_recv_entry(cm_node, 1);
1005                         }
1006                 }
1007
1008                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1009                 do {
1010                         send_entry = cm_node->send_entry;
1011                         if (!send_entry)
1012                                 break;
1013                         if (time_after(send_entry->timetosend, jiffies)) {
1014                                 if (cm_node->state != NES_CM_STATE_TSA) {
1015                                         if ((nexttimeout >
1016                                              send_entry->timetosend) ||
1017                                             !settimer) {
1018                                                 nexttimeout =
1019                                                         send_entry->timetosend;
1020                                                 settimer = 1;
1021                                         }
1022                                 } else {
1023                                         free_retrans_entry(cm_node);
1024                                 }
1025                                 break;
1026                         }
1027
1028                         if ((cm_node->state == NES_CM_STATE_TSA) ||
1029                             (cm_node->state == NES_CM_STATE_CLOSED)) {
1030                                 free_retrans_entry(cm_node);
1031                                 break;
1032                         }
1033
1034                         if (!send_entry->retranscount ||
1035                             !send_entry->retrycount) {
1036                                 cm_packets_dropped++;
1037                                 free_retrans_entry(cm_node);
1038
1039                                 spin_unlock_irqrestore(
1040                                         &cm_node->retrans_list_lock, flags);
1041                                 nes_retrans_expired(cm_node);
1042                                 cm_node->state = NES_CM_STATE_CLOSED;
1043                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
1044                                                   flags);
1045                                 break;
1046                         }
1047                         atomic_inc(&send_entry->skb->users);
1048                         cm_packets_retrans++;
1049                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
1050                                   "for node %p, jiffies = %lu, time to send = "
1051                                   "%lu, retranscount = %u, send_entry->seq_num = "
1052                                   "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
1053                                   "0x%08X\n", send_entry, cm_node, jiffies,
1054                                   send_entry->timetosend,
1055                                   send_entry->retranscount,
1056                                   send_entry->seq_num,
1057                                   cm_node->tcp_cntxt.rem_ack_num);
1058
1059                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
1060                                                flags);
1061                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
1062                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1063                         if (ret != NETDEV_TX_OK) {
1064                                 nes_debug(NES_DBG_CM, "rexmit failed for "
1065                                           "node=%p\n", cm_node);
1066                                 cm_packets_bounced++;
1067                                 send_entry->retrycount--;
1068                                 nexttimeout = jiffies + NES_SHORT_TIME;
1069                                 settimer = 1;
1070                                 break;
1071                         } else {
1072                                 cm_packets_sent++;
1073                         }
1074                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
1075                                   "%u, retry count = %u.\n",
1076                                   send_entry->retranscount,
1077                                   send_entry->retrycount);
1078                         if (send_entry->send_retrans) {
1079                                 send_entry->retranscount--;
1080                                 timetosend = (NES_RETRY_TIMEOUT <<
1081                                               (NES_DEFAULT_RETRANS - send_entry->retranscount));
1082
1083                                 send_entry->timetosend = jiffies +
1084                                                          min(timetosend, NES_MAX_TIMEOUT);
1085                                 if (nexttimeout > send_entry->timetosend ||
1086                                     !settimer) {
1087                                         nexttimeout = send_entry->timetosend;
1088                                         settimer = 1;
1089                                 }
1090                         } else {
1091                                 int close_when_complete;
1092                                 close_when_complete =
1093                                         send_entry->close_when_complete;
1094                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
1095                                           cm_node, cm_node->state);
1096                                 free_retrans_entry(cm_node);
1097                                 if (close_when_complete)
1098                                         rem_ref_cm_node(cm_node->cm_core,
1099                                                         cm_node);
1100                         }
1101                 } while (0);
1102
1103                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1104                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1105         }
1106
1107         if (settimer) {
1108                 if (!timer_pending(&cm_core->tcp_timer))
1109                         mod_timer(&cm_core->tcp_timer, nexttimeout);
1110         }
1111 }
1112
1113
1114 /**
1115  * send_syn
1116  */
1117 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
1118                     struct sk_buff *skb)
1119 {
1120         int ret;
1121         int flags = SET_SYN;
1122         char optionsbuffer[sizeof(struct option_mss) +
1123                            sizeof(struct option_windowscale) + sizeof(struct option_base) +
1124                            TCP_OPTIONS_PADDING];
1125
1126         int optionssize = 0;
1127         /* Sending MSS option */
1128         union all_known_options *options;
1129
1130         if (!cm_node)
1131                 return -EINVAL;
1132
1133         options = (union all_known_options *)&optionsbuffer[optionssize];
1134         options->as_mss.optionnum = OPTION_NUMBER_MSS;
1135         options->as_mss.length = sizeof(struct option_mss);
1136         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
1137         optionssize += sizeof(struct option_mss);
1138
1139         options = (union all_known_options *)&optionsbuffer[optionssize];
1140         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
1141         options->as_windowscale.length = sizeof(struct option_windowscale);
1142         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
1143         optionssize += sizeof(struct option_windowscale);
1144
1145         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
1146                 options = (union all_known_options *)&optionsbuffer[optionssize];
1147                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
1148                 options->as_base.length = sizeof(struct option_base);
1149                 optionssize += sizeof(struct option_base);
1150                 /* we need the size to be a multiple of 4 */
1151                 options = (union all_known_options *)&optionsbuffer[optionssize];
1152                 options->as_end = 1;
1153                 optionssize += 1;
1154                 options = (union all_known_options *)&optionsbuffer[optionssize];
1155                 options->as_end = 1;
1156                 optionssize += 1;
1157         }
1158
1159         options = (union all_known_options *)&optionsbuffer[optionssize];
1160         options->as_end = OPTION_NUMBER_END;
1161         optionssize += 1;
1162
1163         if (!skb)
1164                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1165         if (!skb) {
1166                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1167                 return -1;
1168         }
1169
1170         if (sendack)
1171                 flags |= SET_ACK;
1172
1173         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1174         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1175
1176         return ret;
1177 }
1178
1179
1180 /**
1181  * send_reset
1182  */
1183 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1184 {
1185         int ret;
1186         int flags = SET_RST | SET_ACK;
1187
1188         if (!skb)
1189                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1190         if (!skb) {
1191                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1192                 return -ENOMEM;
1193         }
1194
1195         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1196         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1197
1198         return ret;
1199 }
1200
1201
1202 /**
1203  * send_ack
1204  */
1205 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1206 {
1207         int ret;
1208
1209         if (!skb)
1210                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1211
1212         if (!skb) {
1213                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1214                 return -1;
1215         }
1216
1217         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1218         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1219
1220         return ret;
1221 }
1222
1223
1224 /**
1225  * send_fin
1226  */
1227 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1228 {
1229         int ret;
1230
1231         /* if we didn't get a frame get one */
1232         if (!skb)
1233                 skb = dev_alloc_skb(MAX_CM_BUFFER);
1234
1235         if (!skb) {
1236                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1237                 return -1;
1238         }
1239
1240         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1241         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1242
1243         return ret;
1244 }
1245
1246
1247 /**
1248  * find_node - find a cm node that matches the reference cm node
1249  */
1250 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1251                                      u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1252 {
1253         unsigned long flags;
1254         struct list_head *hte;
1255         struct nes_cm_node *cm_node;
1256
1257         /* get a handle on the hte */
1258         hte = &cm_core->connected_nodes;
1259
1260         /* walk list and find cm_node associated with this session ID */
1261         spin_lock_irqsave(&cm_core->ht_lock, flags);
1262         list_for_each_entry(cm_node, hte, list) {
1263                 /* compare quad, return node handle if a match */
1264                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1265                           cm_node->loc_addr, cm_node->loc_port,
1266                           loc_addr, loc_port,
1267                           cm_node->rem_addr, cm_node->rem_port,
1268                           rem_addr, rem_port);
1269                 if ((cm_node->mapped_loc_addr == loc_addr) &&
1270                         (cm_node->mapped_loc_port == loc_port) &&
1271                         (cm_node->mapped_rem_addr == rem_addr) &&
1272                         (cm_node->mapped_rem_port == rem_port)) {
1273
1274                         add_ref_cm_node(cm_node);
1275                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1276                         return cm_node;
1277                 }
1278         }
1279         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1280
1281         /* no owner node */
1282         return NULL;
1283 }
1284
1285
1286 /**
1287  * find_listener - find a cm node listening on this addr-port pair
1288  */
1289 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1290                                         nes_addr_t dst_addr, u16 dst_port,
1291                                         enum nes_cm_listener_state listener_state, int local)
1292 {
1293         unsigned long flags;
1294         struct nes_cm_listener *listen_node;
1295         nes_addr_t listen_addr;
1296         u16 listen_port;
1297
1298         /* walk list and find cm_node associated with this session ID */
1299         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1300         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1301                 if (local) {
1302                         listen_addr = listen_node->loc_addr;
1303                         listen_port = listen_node->loc_port;
1304                 } else {
1305                         listen_addr = listen_node->mapped_loc_addr;
1306                         listen_port = listen_node->mapped_loc_port;
1307                 }
1308                 /* compare node pair, return node handle if a match */
1309                 if (((listen_addr == dst_addr) ||
1310                      listen_addr == 0x00000000) &&
1311                     (listen_port == dst_port) &&
1312                     (listener_state & listen_node->listener_state)) {
1313                         atomic_inc(&listen_node->ref_count);
1314                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1315                         return listen_node;
1316                 }
1317         }
1318         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1319
1320         /* no listener */
1321         return NULL;
1322 }
1323
1324 /**
1325  * add_hte_node - add a cm node to the hash table
1326  */
1327 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1328 {
1329         unsigned long flags;
1330         struct list_head *hte;
1331
1332         if (!cm_node || !cm_core)
1333                 return -EINVAL;
1334
1335         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1336                   cm_node);
1337
1338         spin_lock_irqsave(&cm_core->ht_lock, flags);
1339
1340         /* get a handle on the hash table element (list head for this slot) */
1341         hte = &cm_core->connected_nodes;
1342         list_add_tail(&cm_node->list, hte);
1343         atomic_inc(&cm_core->ht_node_cnt);
1344
1345         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1346
1347         return 0;
1348 }
1349
1350
1351 /**
1352  * mini_cm_dec_refcnt_listen
1353  */
1354 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1355                                      struct nes_cm_listener *listener, int free_hanging_nodes)
1356 {
1357         int ret = -EINVAL;
1358         int err = 0;
1359         unsigned long flags;
1360         struct list_head *list_pos = NULL;
1361         struct list_head *list_temp = NULL;
1362         struct nes_cm_node *cm_node = NULL;
1363         struct list_head reset_list;
1364
1365         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1366                   "refcnt=%d\n", listener, free_hanging_nodes,
1367                   atomic_read(&listener->ref_count));
1368         /* free non-accelerated child nodes for this listener */
1369         INIT_LIST_HEAD(&reset_list);
1370         if (free_hanging_nodes) {
1371                 spin_lock_irqsave(&cm_core->ht_lock, flags);
1372                 list_for_each_safe(list_pos, list_temp,
1373                                    &g_cm_core->connected_nodes) {
1374                         cm_node = container_of(list_pos, struct nes_cm_node,
1375                                                list);
1376                         if ((cm_node->listener == listener) &&
1377                             (!cm_node->accelerated)) {
1378                                 add_ref_cm_node(cm_node);
1379                                 list_add(&cm_node->reset_entry, &reset_list);
1380                         }
1381                 }
1382                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1383         }
1384
1385         list_for_each_safe(list_pos, list_temp, &reset_list) {
1386                 cm_node = container_of(list_pos, struct nes_cm_node,
1387                                        reset_entry);
1388                 {
1389                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
1390                         enum nes_cm_node_state old_state;
1391                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1392                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1393                         } else {
1394                                 if (!loopback) {
1395                                         cleanup_retrans_entry(cm_node);
1396                                         err = send_reset(cm_node, NULL);
1397                                         if (err) {
1398                                                 cm_node->state =
1399                                                         NES_CM_STATE_CLOSED;
1400                                                 WARN_ON(1);
1401                                         } else {
1402                                                 old_state = cm_node->state;
1403                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1404                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1405                                                         rem_ref_cm_node(
1406                                                                 cm_node->cm_core,
1407                                                                 cm_node);
1408                                         }
1409                                 } else {
1410                                         struct nes_cm_event event;
1411
1412                                         event.cm_node = loopback;
1413                                         event.cm_info.rem_addr =
1414                                                         loopback->rem_addr;
1415                                         event.cm_info.loc_addr =
1416                                                         loopback->loc_addr;
1417                                         event.cm_info.rem_port =
1418                                                         loopback->rem_port;
1419                                         event.cm_info.loc_port =
1420                                                          loopback->loc_port;
1421                                         event.cm_info.cm_id = loopback->cm_id;
1422                                         add_ref_cm_node(loopback);
1423                                         loopback->state = NES_CM_STATE_CLOSED;
1424                                         cm_event_connect_error(&event);
1425                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1426
1427                                         rem_ref_cm_node(cm_node->cm_core,
1428                                                          cm_node);
1429
1430                                 }
1431                         }
1432                 }
1433         }
1434
1435         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1436         if (!atomic_dec_return(&listener->ref_count)) {
1437                 list_del(&listener->list);
1438
1439                 /* decrement our listen node count */
1440                 atomic_dec(&cm_core->listen_node_cnt);
1441
1442                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1443
1444                 if (listener->nesvnic) {
1445                         nes_manage_apbvt(listener->nesvnic,
1446                                 listener->mapped_loc_port,
1447                                 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn),
1448                                 NES_MANAGE_APBVT_DEL);
1449
1450                         nes_remove_mapinfo(listener->loc_addr,
1451                                         listener->loc_port,
1452                                         listener->mapped_loc_addr,
1453                                         listener->mapped_loc_port);
1454                         nes_debug(NES_DBG_NLMSG,
1455                                         "Delete APBVT mapped_loc_port = %04X\n",
1456                                         listener->mapped_loc_port);
1457                 }
1458
1459                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1460
1461                 kfree(listener);
1462                 listener = NULL;
1463                 ret = 0;
1464                 atomic_inc(&cm_listens_destroyed);
1465         } else {
1466                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1467         }
1468         if (listener) {
1469                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1470                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1471                                   " with non-zero pending accepts=%u\n",
1472                                   listener, atomic_read(&listener->pend_accepts_cnt));
1473         }
1474
1475         return ret;
1476 }
1477
1478
1479 /**
1480  * mini_cm_del_listen
1481  */
1482 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1483                               struct nes_cm_listener *listener)
1484 {
1485         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1486         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1487         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1488 }
1489
1490
1491 /**
1492  * mini_cm_accelerated
1493  */
1494 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1495                                       struct nes_cm_node *cm_node)
1496 {
1497         cm_node->accelerated = 1;
1498
1499         if (cm_node->accept_pend) {
1500                 BUG_ON(!cm_node->listener);
1501                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1502                 cm_node->accept_pend = 0;
1503                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1504         }
1505
1506         if (!timer_pending(&cm_core->tcp_timer))
1507                 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1508
1509         return 0;
1510 }
1511
1512
1513 /**
1514  * nes_addr_resolve_neigh
1515  */
1516 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1517 {
1518         struct rtable *rt;
1519         struct neighbour *neigh;
1520         int rc = arpindex;
1521         struct net_device *netdev;
1522         struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1523
1524         rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1525         if (IS_ERR(rt)) {
1526                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1527                        __func__, dst_ip);
1528                 return rc;
1529         }
1530
1531         if (netif_is_bond_slave(nesvnic->netdev))
1532                 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1533         else
1534                 netdev = nesvnic->netdev;
1535
1536         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1537
1538         rcu_read_lock();
1539         if (neigh) {
1540                 if (neigh->nud_state & NUD_VALID) {
1541                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1542                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1543                                   neigh->ha, ntohl(rt->rt_gateway));
1544
1545                         if (arpindex >= 0) {
1546                                 if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) {
1547                                         /* Mac address same as in nes_arp_table */
1548                                         goto out;
1549                                 }
1550
1551                                 nes_manage_arp_cache(nesvnic->netdev,
1552                                                      nesadapter->arp_table[arpindex].mac_addr,
1553                                                      dst_ip, NES_ARP_DELETE);
1554                         }
1555
1556                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1557                                              dst_ip, NES_ARP_ADD);
1558                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1559                                            NES_ARP_RESOLVE);
1560                 } else {
1561                         neigh_event_send(neigh, NULL);
1562                 }
1563         }
1564 out:
1565         rcu_read_unlock();
1566
1567         if (neigh)
1568                 neigh_release(neigh);
1569
1570         ip_rt_put(rt);
1571         return rc;
1572 }
1573
1574 /**
1575  * make_cm_node - create a new instance of a cm node
1576  */
1577 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1578                                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1579                                         struct nes_cm_listener *listener)
1580 {
1581         struct nes_cm_node *cm_node;
1582         struct timespec ts;
1583         int oldarpindex = 0;
1584         int arpindex = 0;
1585         struct nes_device *nesdev;
1586         struct nes_adapter *nesadapter;
1587
1588         /* create an hte and cm_node for this instance */
1589         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1590         if (!cm_node)
1591                 return NULL;
1592
1593         /* set our node specific transport info */
1594         if (listener) {
1595                 cm_node->loc_addr = listener->loc_addr;
1596                 cm_node->loc_port = listener->loc_port;
1597         } else {
1598                 cm_node->loc_addr = cm_info->loc_addr;
1599                 cm_node->loc_port = cm_info->loc_port;
1600         }
1601         cm_node->rem_addr = cm_info->rem_addr;
1602         cm_node->rem_port = cm_info->rem_port;
1603
1604         cm_node->mapped_loc_addr = cm_info->mapped_loc_addr;
1605         cm_node->mapped_rem_addr = cm_info->mapped_rem_addr;
1606         cm_node->mapped_loc_port = cm_info->mapped_loc_port;
1607         cm_node->mapped_rem_port = cm_info->mapped_rem_port;
1608
1609         cm_node->mpa_frame_rev = mpa_version;
1610         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1611         cm_node->mpav2_ird_ord = 0;
1612         cm_node->ird_size = 0;
1613         cm_node->ord_size = 0;
1614
1615         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1616                   &cm_node->loc_addr, cm_node->loc_port,
1617                   &cm_node->rem_addr, cm_node->rem_port);
1618         cm_node->listener = listener;
1619         if (listener)
1620                 cm_node->tos = listener->tos;
1621         cm_node->netdev = nesvnic->netdev;
1622         cm_node->cm_id = cm_info->cm_id;
1623         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1624
1625         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1626                   cm_node->cm_id);
1627
1628         spin_lock_init(&cm_node->retrans_list_lock);
1629
1630         cm_node->loopbackpartner = NULL;
1631         atomic_set(&cm_node->ref_count, 1);
1632         /* associate our parent CM core */
1633         cm_node->cm_core = cm_core;
1634         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1635         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1636         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1637                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1638         ts = current_kernel_time();
1639         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1640         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1641                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1642         cm_node->tcp_cntxt.rcv_nxt = 0;
1643         /* get a unique session ID , add thread_id to an upcounter to handle race */
1644         atomic_inc(&cm_core->node_cnt);
1645         cm_node->conn_type = cm_info->conn_type;
1646         cm_node->apbvt_set = 0;
1647         cm_node->accept_pend = 0;
1648
1649         cm_node->nesvnic = nesvnic;
1650         /* get some device handles, for arp lookup */
1651         nesdev = nesvnic->nesdev;
1652         nesadapter = nesdev->nesadapter;
1653
1654         cm_node->loopbackpartner = NULL;
1655
1656         /* get the mac addr for the remote node */
1657         oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1658                                 NULL, NES_ARP_RESOLVE);
1659         arpindex = nes_addr_resolve_neigh(nesvnic,
1660                                 cm_node->mapped_rem_addr, oldarpindex);
1661         if (arpindex < 0) {
1662                 kfree(cm_node);
1663                 return NULL;
1664         }
1665
1666         /* copy the mac addr to node context */
1667         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1668         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1669                   cm_node->rem_mac);
1670
1671         add_hte_node(cm_core, cm_node);
1672         atomic_inc(&cm_nodes_created);
1673
1674         return cm_node;
1675 }
1676
1677
1678 /**
1679  * add_ref_cm_node - destroy an instance of a cm node
1680  */
1681 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1682 {
1683         atomic_inc(&cm_node->ref_count);
1684         return 0;
1685 }
1686
1687
1688 /**
1689  * rem_ref_cm_node - destroy an instance of a cm node
1690  */
1691 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1692                            struct nes_cm_node *cm_node)
1693 {
1694         unsigned long flags;
1695         struct nes_qp *nesqp;
1696
1697         if (!cm_node)
1698                 return -EINVAL;
1699
1700         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1701         if (atomic_dec_return(&cm_node->ref_count)) {
1702                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1703                 return 0;
1704         }
1705         list_del(&cm_node->list);
1706         atomic_dec(&cm_core->ht_node_cnt);
1707         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1708
1709         /* if the node is destroyed before connection was accelerated */
1710         if (!cm_node->accelerated && cm_node->accept_pend) {
1711                 BUG_ON(!cm_node->listener);
1712                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1713                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1714         }
1715         WARN_ON(cm_node->send_entry);
1716         if (cm_node->recv_entry)
1717                 handle_recv_entry(cm_node, 0);
1718         if (cm_node->listener) {
1719                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1720         } else {
1721                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1722                         nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1723                                          PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1724                                          NES_MANAGE_APBVT_DEL);
1725                 }
1726                 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1727                                         cm_node->mapped_loc_port);
1728                 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1729                         cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1730         }
1731
1732         atomic_dec(&cm_core->node_cnt);
1733         atomic_inc(&cm_nodes_destroyed);
1734         nesqp = cm_node->nesqp;
1735         if (nesqp) {
1736                 nesqp->cm_node = NULL;
1737                 nes_rem_ref(&nesqp->ibqp);
1738                 cm_node->nesqp = NULL;
1739         }
1740
1741         kfree(cm_node);
1742         return 0;
1743 }
1744
1745 /**
1746  * process_options
1747  */
1748 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1749                            u32 optionsize, u32 syn_packet)
1750 {
1751         u32 tmp;
1752         u32 offset = 0;
1753         union all_known_options *all_options;
1754         char got_mss_option = 0;
1755
1756         while (offset < optionsize) {
1757                 all_options = (union all_known_options *)(optionsloc + offset);
1758                 switch (all_options->as_base.optionnum) {
1759                 case OPTION_NUMBER_END:
1760                         offset = optionsize;
1761                         break;
1762                 case OPTION_NUMBER_NONE:
1763                         offset += 1;
1764                         continue;
1765                 case OPTION_NUMBER_MSS:
1766                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1767                                   "Size: %d\n", __func__,
1768                                   all_options->as_mss.length, offset, optionsize);
1769                         got_mss_option = 1;
1770                         if (all_options->as_mss.length != 4) {
1771                                 return 1;
1772                         } else {
1773                                 tmp = ntohs(all_options->as_mss.mss);
1774                                 if (tmp > 0 && tmp <
1775                                     cm_node->tcp_cntxt.mss)
1776                                         cm_node->tcp_cntxt.mss = tmp;
1777                         }
1778                         break;
1779                 case OPTION_NUMBER_WINDOW_SCALE:
1780                         cm_node->tcp_cntxt.snd_wscale =
1781                                 all_options->as_windowscale.shiftcount;
1782                         break;
1783                 default:
1784                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1785                                   all_options->as_base.optionnum);
1786                         break;
1787                 }
1788                 offset += all_options->as_base.length;
1789         }
1790         if ((!got_mss_option) && (syn_packet))
1791                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1792         return 0;
1793 }
1794
1795 static void drop_packet(struct sk_buff *skb)
1796 {
1797         atomic_inc(&cm_accel_dropped_pkts);
1798         dev_kfree_skb_any(skb);
1799 }
1800
1801 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1802 {
1803         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1804                   "refcnt=%d\n", cm_node, cm_node->state,
1805                   atomic_read(&cm_node->ref_count));
1806         switch (cm_node->state) {
1807         case NES_CM_STATE_SYN_RCVD:
1808         case NES_CM_STATE_SYN_SENT:
1809         case NES_CM_STATE_ESTABLISHED:
1810         case NES_CM_STATE_MPAREJ_RCVD:
1811                 cm_node->tcp_cntxt.rcv_nxt++;
1812                 cleanup_retrans_entry(cm_node);
1813                 cm_node->state = NES_CM_STATE_LAST_ACK;
1814                 send_fin(cm_node, NULL);
1815                 break;
1816         case NES_CM_STATE_MPAREQ_SENT:
1817                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1818                 cm_node->tcp_cntxt.rcv_nxt++;
1819                 cleanup_retrans_entry(cm_node);
1820                 cm_node->state = NES_CM_STATE_CLOSED;
1821                 add_ref_cm_node(cm_node);
1822                 send_reset(cm_node, NULL);
1823                 break;
1824         case NES_CM_STATE_FIN_WAIT1:
1825                 cm_node->tcp_cntxt.rcv_nxt++;
1826                 cleanup_retrans_entry(cm_node);
1827                 cm_node->state = NES_CM_STATE_CLOSING;
1828                 send_ack(cm_node, NULL);
1829                 /* Wait for ACK as this is simultaneous close..
1830                 * After we receive ACK, do not send anything..
1831                 * Just rm the node.. Done.. */
1832                 break;
1833         case NES_CM_STATE_FIN_WAIT2:
1834                 cm_node->tcp_cntxt.rcv_nxt++;
1835                 cleanup_retrans_entry(cm_node);
1836                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1837                 send_ack(cm_node, NULL);
1838                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1839                 break;
1840         case NES_CM_STATE_TIME_WAIT:
1841                 cm_node->tcp_cntxt.rcv_nxt++;
1842                 cleanup_retrans_entry(cm_node);
1843                 cm_node->state = NES_CM_STATE_CLOSED;
1844                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1845                 break;
1846         case NES_CM_STATE_TSA:
1847         default:
1848                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1849                         cm_node, cm_node->state);
1850                 break;
1851         }
1852 }
1853
1854
1855 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1856         struct tcphdr *tcph)
1857 {
1858
1859         int     reset = 0;      /* whether to send reset in case of err.. */
1860         atomic_inc(&cm_resets_recvd);
1861         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1862                         " refcnt=%d\n", cm_node, cm_node->state,
1863                         atomic_read(&cm_node->ref_count));
1864         cleanup_retrans_entry(cm_node);
1865         switch (cm_node->state) {
1866         case NES_CM_STATE_SYN_SENT:
1867         case NES_CM_STATE_MPAREQ_SENT:
1868                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1869                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1870                         cm_node->listener, cm_node->state);
1871                 switch (cm_node->mpa_frame_rev) {
1872                 case IETF_MPA_V2:
1873                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1874                         /* send a syn and goto syn sent state */
1875                         cm_node->state = NES_CM_STATE_SYN_SENT;
1876                         if (send_syn(cm_node, 0, NULL)) {
1877                                 active_open_err(cm_node, skb, reset);
1878                         }
1879                         break;
1880                 case IETF_MPA_V1:
1881                 default:
1882                         active_open_err(cm_node, skb, reset);
1883                         break;
1884                 }
1885                 break;
1886         case NES_CM_STATE_MPAREQ_RCVD:
1887                 atomic_inc(&cm_node->passive_state);
1888                 dev_kfree_skb_any(skb);
1889                 break;
1890         case NES_CM_STATE_ESTABLISHED:
1891         case NES_CM_STATE_SYN_RCVD:
1892         case NES_CM_STATE_LISTENING:
1893                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1894                 passive_open_err(cm_node, skb, reset);
1895                 break;
1896         case NES_CM_STATE_TSA:
1897                 active_open_err(cm_node, skb, reset);
1898                 break;
1899         case NES_CM_STATE_CLOSED:
1900                 drop_packet(skb);
1901                 break;
1902         case NES_CM_STATE_FIN_WAIT2:
1903         case NES_CM_STATE_FIN_WAIT1:
1904         case NES_CM_STATE_LAST_ACK:
1905                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1906         case NES_CM_STATE_TIME_WAIT:
1907                 cm_node->state = NES_CM_STATE_CLOSED;
1908                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1909                 drop_packet(skb);
1910                 break;
1911         default:
1912                 drop_packet(skb);
1913                 break;
1914         }
1915 }
1916
1917
1918 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1919 {
1920         int ret = 0;
1921         int datasize = skb->len;
1922         u8 *dataloc = skb->data;
1923
1924         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1925         u32 res_type;
1926
1927         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1928         if (ret) {
1929                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1930                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1931                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1932                                   "cm_node=%p listener=%p state=%d\n", __func__,
1933                                   __LINE__, cm_node, cm_node->listener,
1934                                   cm_node->state);
1935                         active_open_err(cm_node, skb, 1);
1936                 } else {
1937                         passive_open_err(cm_node, skb, 1);
1938                 }
1939                 return;
1940         }
1941
1942         switch (cm_node->state) {
1943         case NES_CM_STATE_ESTABLISHED:
1944                 if (res_type == NES_MPA_REQUEST_REJECT)
1945                         /*BIG problem as we are receiving the MPA.. So should
1946                          * not be REJECT.. This is Passive Open.. We can
1947                          * only receive it Reject for Active Open...*/
1948                         WARN_ON(1);
1949                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1950                 type = NES_CM_EVENT_MPA_REQ;
1951                 atomic_set(&cm_node->passive_state,
1952                            NES_PASSIVE_STATE_INDICATED);
1953                 break;
1954         case NES_CM_STATE_MPAREQ_SENT:
1955                 cleanup_retrans_entry(cm_node);
1956                 if (res_type == NES_MPA_REQUEST_REJECT) {
1957                         type = NES_CM_EVENT_MPA_REJECT;
1958                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1959                 } else {
1960                         type = NES_CM_EVENT_CONNECTED;
1961                         cm_node->state = NES_CM_STATE_TSA;
1962                 }
1963
1964                 break;
1965         default:
1966                 WARN_ON(1);
1967                 break;
1968         }
1969         dev_kfree_skb_any(skb);
1970         create_event(cm_node, type);
1971 }
1972
1973 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1974 {
1975         switch (cm_node->state) {
1976         case NES_CM_STATE_SYN_SENT:
1977         case NES_CM_STATE_MPAREQ_SENT:
1978                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1979                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1980                           cm_node->listener, cm_node->state);
1981                 active_open_err(cm_node, skb, 1);
1982                 break;
1983         case NES_CM_STATE_ESTABLISHED:
1984         case NES_CM_STATE_SYN_RCVD:
1985                 passive_open_err(cm_node, skb, 1);
1986                 break;
1987         case NES_CM_STATE_TSA:
1988         default:
1989                 drop_packet(skb);
1990         }
1991 }
1992
1993 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1994                      struct sk_buff *skb)
1995 {
1996         int err;
1997
1998         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1999         if (err)
2000                 active_open_err(cm_node, skb, 1);
2001
2002         return err;
2003 }
2004
2005 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2006                      struct sk_buff *skb)
2007 {
2008         int err = 0;
2009         u32 seq;
2010         u32 ack_seq;
2011         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2012         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2013         u32 rcv_wnd;
2014
2015         seq = ntohl(tcph->seq);
2016         ack_seq = ntohl(tcph->ack_seq);
2017         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2018         if (ack_seq != loc_seq_num)
2019                 err = 1;
2020         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2021                 err = 1;
2022         if (err) {
2023                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2024                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2025                           cm_node->listener, cm_node->state);
2026                 indicate_pkt_err(cm_node, skb);
2027                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2028                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2029                           rcv_wnd);
2030         }
2031         return err;
2032 }
2033
2034 /*
2035  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2036  * is created with a listener or it may comein as rexmitted packet which in
2037  * that case will be just dropped.
2038  */
2039 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2040                            struct tcphdr *tcph)
2041 {
2042         int ret;
2043         u32 inc_sequence;
2044         int optionsize;
2045
2046         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2047         skb_trim(skb, 0);
2048         inc_sequence = ntohl(tcph->seq);
2049
2050         switch (cm_node->state) {
2051         case NES_CM_STATE_SYN_SENT:
2052         case NES_CM_STATE_MPAREQ_SENT:
2053                 /* Rcvd syn on active open connection*/
2054                 active_open_err(cm_node, skb, 1);
2055                 break;
2056         case NES_CM_STATE_LISTENING:
2057                 /* Passive OPEN */
2058                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2059                     cm_node->listener->backlog) {
2060                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
2061                                   "pressure \n");
2062                         cm_backlog_drops++;
2063                         passive_open_err(cm_node, skb, 0);
2064                         break;
2065                 }
2066                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2067                                          1);
2068                 if (ret) {
2069                         passive_open_err(cm_node, skb, 0);
2070                         /* drop pkt */
2071                         break;
2072                 }
2073                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2074                 BUG_ON(cm_node->send_entry);
2075                 cm_node->accept_pend = 1;
2076                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2077
2078                 cm_node->state = NES_CM_STATE_SYN_RCVD;
2079                 send_syn(cm_node, 1, skb);
2080                 break;
2081         case NES_CM_STATE_CLOSED:
2082                 cleanup_retrans_entry(cm_node);
2083                 add_ref_cm_node(cm_node);
2084                 send_reset(cm_node, skb);
2085                 break;
2086         case NES_CM_STATE_TSA:
2087         case NES_CM_STATE_ESTABLISHED:
2088         case NES_CM_STATE_FIN_WAIT1:
2089         case NES_CM_STATE_FIN_WAIT2:
2090         case NES_CM_STATE_MPAREQ_RCVD:
2091         case NES_CM_STATE_LAST_ACK:
2092         case NES_CM_STATE_CLOSING:
2093         case NES_CM_STATE_UNKNOWN:
2094         default:
2095                 drop_packet(skb);
2096                 break;
2097         }
2098 }
2099
2100 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2101                               struct tcphdr *tcph)
2102 {
2103         int ret;
2104         u32 inc_sequence;
2105         int optionsize;
2106
2107         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2108         skb_trim(skb, 0);
2109         inc_sequence = ntohl(tcph->seq);
2110         switch (cm_node->state) {
2111         case NES_CM_STATE_SYN_SENT:
2112                 cleanup_retrans_entry(cm_node);
2113                 /* active open */
2114                 if (check_syn(cm_node, tcph, skb))
2115                         return;
2116                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2117                 /* setup options */
2118                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2119                 if (ret) {
2120                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2121                                   cm_node);
2122                         break;
2123                 }
2124                 cleanup_retrans_entry(cm_node);
2125                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2126                 send_mpa_request(cm_node, skb);
2127                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2128                 break;
2129         case NES_CM_STATE_MPAREQ_RCVD:
2130                 /* passive open, so should not be here */
2131                 passive_open_err(cm_node, skb, 1);
2132                 break;
2133         case NES_CM_STATE_LISTENING:
2134                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2135                 cleanup_retrans_entry(cm_node);
2136                 cm_node->state = NES_CM_STATE_CLOSED;
2137                 send_reset(cm_node, skb);
2138                 break;
2139         case NES_CM_STATE_CLOSED:
2140                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2141                 cleanup_retrans_entry(cm_node);
2142                 add_ref_cm_node(cm_node);
2143                 send_reset(cm_node, skb);
2144                 break;
2145         case NES_CM_STATE_ESTABLISHED:
2146         case NES_CM_STATE_FIN_WAIT1:
2147         case NES_CM_STATE_FIN_WAIT2:
2148         case NES_CM_STATE_LAST_ACK:
2149         case NES_CM_STATE_TSA:
2150         case NES_CM_STATE_CLOSING:
2151         case NES_CM_STATE_UNKNOWN:
2152         case NES_CM_STATE_MPAREQ_SENT:
2153         default:
2154                 drop_packet(skb);
2155                 break;
2156         }
2157 }
2158
2159 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2160                           struct tcphdr *tcph)
2161 {
2162         int datasize = 0;
2163         u32 inc_sequence;
2164         int ret = 0;
2165         int optionsize;
2166
2167         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2168
2169         if (check_seq(cm_node, tcph, skb))
2170                 return -EINVAL;
2171
2172         skb_pull(skb, tcph->doff << 2);
2173         inc_sequence = ntohl(tcph->seq);
2174         datasize = skb->len;
2175         switch (cm_node->state) {
2176         case NES_CM_STATE_SYN_RCVD:
2177                 /* Passive OPEN */
2178                 cleanup_retrans_entry(cm_node);
2179                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2180                 if (ret)
2181                         break;
2182                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2183                 cm_node->state = NES_CM_STATE_ESTABLISHED;
2184                 if (datasize) {
2185                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2186                         nes_get_remote_addr(cm_node);
2187                         handle_rcv_mpa(cm_node, skb);
2188                 } else { /* rcvd ACK only */
2189                         dev_kfree_skb_any(skb);
2190                 }
2191                 break;
2192         case NES_CM_STATE_ESTABLISHED:
2193                 /* Passive OPEN */
2194                 cleanup_retrans_entry(cm_node);
2195                 if (datasize) {
2196                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2197                         handle_rcv_mpa(cm_node, skb);
2198                 } else {
2199                         drop_packet(skb);
2200                 }
2201                 break;
2202         case NES_CM_STATE_MPAREQ_SENT:
2203                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2204                 if (datasize) {
2205                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2206                         handle_rcv_mpa(cm_node, skb);
2207                 } else { /* Could be just an ack pkt.. */
2208                         dev_kfree_skb_any(skb);
2209                 }
2210                 break;
2211         case NES_CM_STATE_LISTENING:
2212                 cleanup_retrans_entry(cm_node);
2213                 cm_node->state = NES_CM_STATE_CLOSED;
2214                 send_reset(cm_node, skb);
2215                 break;
2216         case NES_CM_STATE_CLOSED:
2217                 cleanup_retrans_entry(cm_node);
2218                 add_ref_cm_node(cm_node);
2219                 send_reset(cm_node, skb);
2220                 break;
2221         case NES_CM_STATE_LAST_ACK:
2222         case NES_CM_STATE_CLOSING:
2223                 cleanup_retrans_entry(cm_node);
2224                 cm_node->state = NES_CM_STATE_CLOSED;
2225                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2226                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2227                 drop_packet(skb);
2228                 break;
2229         case NES_CM_STATE_FIN_WAIT1:
2230                 cleanup_retrans_entry(cm_node);
2231                 drop_packet(skb);
2232                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2233                 break;
2234         case NES_CM_STATE_SYN_SENT:
2235         case NES_CM_STATE_FIN_WAIT2:
2236         case NES_CM_STATE_TSA:
2237         case NES_CM_STATE_MPAREQ_RCVD:
2238         case NES_CM_STATE_UNKNOWN:
2239         default:
2240                 cleanup_retrans_entry(cm_node);
2241                 drop_packet(skb);
2242                 break;
2243         }
2244         return ret;
2245 }
2246
2247
2248
2249 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2250                               struct sk_buff *skb, int optionsize, int passive)
2251 {
2252         u8 *optionsloc = (u8 *)&tcph[1];
2253
2254         if (optionsize) {
2255                 if (process_options(cm_node, optionsloc, optionsize,
2256                                     (u32)tcph->syn)) {
2257                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2258                                   __func__, cm_node);
2259                         if (passive)
2260                                 passive_open_err(cm_node, skb, 1);
2261                         else
2262                                 active_open_err(cm_node, skb, 1);
2263                         return 1;
2264                 }
2265         }
2266
2267         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2268                                      cm_node->tcp_cntxt.snd_wscale;
2269
2270         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2271                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2272         return 0;
2273 }
2274
2275 /*
2276  * active_open_err() will send reset() if flag set..
2277  * It will also send ABORT event.
2278  */
2279 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2280                             int reset)
2281 {
2282         cleanup_retrans_entry(cm_node);
2283         if (reset) {
2284                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2285                           "state=%d\n", cm_node, cm_node->state);
2286                 add_ref_cm_node(cm_node);
2287                 send_reset(cm_node, skb);
2288         } else {
2289                 dev_kfree_skb_any(skb);
2290         }
2291
2292         cm_node->state = NES_CM_STATE_CLOSED;
2293         create_event(cm_node, NES_CM_EVENT_ABORTED);
2294 }
2295
2296 /*
2297  * passive_open_err() will either do a reset() or will free up the skb and
2298  * remove the cm_node.
2299  */
2300 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2301                              int reset)
2302 {
2303         cleanup_retrans_entry(cm_node);
2304         cm_node->state = NES_CM_STATE_CLOSED;
2305         if (reset) {
2306                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2307                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2308                 send_reset(cm_node, skb);
2309         } else {
2310                 dev_kfree_skb_any(skb);
2311                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2312         }
2313 }
2314
2315 /*
2316  * free_retrans_entry() routines assumes that the retrans_list_lock has
2317  * been acquired before calling.
2318  */
2319 static void free_retrans_entry(struct nes_cm_node *cm_node)
2320 {
2321         struct nes_timer_entry *send_entry;
2322
2323         send_entry = cm_node->send_entry;
2324         if (send_entry) {
2325                 cm_node->send_entry = NULL;
2326                 dev_kfree_skb_any(send_entry->skb);
2327                 kfree(send_entry);
2328                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2329         }
2330 }
2331
2332 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2333 {
2334         unsigned long flags;
2335
2336         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2337         free_retrans_entry(cm_node);
2338         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2339 }
2340
2341 /**
2342  * process_packet
2343  * Returns skb if to be freed, else it will return NULL if already used..
2344  */
2345 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2346                            struct nes_cm_core *cm_core)
2347 {
2348         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2349         struct tcphdr *tcph = tcp_hdr(skb);
2350         u32 fin_set = 0;
2351         int ret = 0;
2352
2353         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2354
2355         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2356                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2357                   tcph->ack, tcph->rst, tcph->fin);
2358
2359         if (tcph->rst) {
2360                 pkt_type = NES_PKT_TYPE_RST;
2361         } else if (tcph->syn) {
2362                 pkt_type = NES_PKT_TYPE_SYN;
2363                 if (tcph->ack)
2364                         pkt_type = NES_PKT_TYPE_SYNACK;
2365         } else if (tcph->ack) {
2366                 pkt_type = NES_PKT_TYPE_ACK;
2367         }
2368         if (tcph->fin)
2369                 fin_set = 1;
2370
2371         switch (pkt_type) {
2372         case NES_PKT_TYPE_SYN:
2373                 handle_syn_pkt(cm_node, skb, tcph);
2374                 break;
2375         case NES_PKT_TYPE_SYNACK:
2376                 handle_synack_pkt(cm_node, skb, tcph);
2377                 break;
2378         case NES_PKT_TYPE_ACK:
2379                 ret = handle_ack_pkt(cm_node, skb, tcph);
2380                 if (fin_set && !ret)
2381                         handle_fin_pkt(cm_node);
2382                 break;
2383         case NES_PKT_TYPE_RST:
2384                 handle_rst_pkt(cm_node, skb, tcph);
2385                 break;
2386         default:
2387                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2388                         handle_fin_pkt(cm_node);
2389                 drop_packet(skb);
2390                 break;
2391         }
2392 }
2393
2394 /**
2395  * mini_cm_listen - create a listen node with params
2396  */
2397 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2398                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2399 {
2400         struct nes_cm_listener *listener;
2401         struct iwpm_dev_data pm_reg_msg;
2402         struct iwpm_sa_data pm_msg;
2403         unsigned long flags;
2404         int iwpm_err = 0;
2405
2406         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2407                   cm_info->loc_addr, cm_info->loc_port);
2408
2409         /* cannot have multiple matching listeners */
2410         listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2411                                 NES_CM_LISTENER_EITHER_STATE, 1);
2412
2413         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2414                 /* find automatically incs ref count ??? */
2415                 atomic_dec(&listener->ref_count);
2416                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2417                 return NULL;
2418         }
2419
2420         if (!listener) {
2421                 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2422                 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2423                 if (iwpm_err) {
2424                         nes_debug(NES_DBG_NLMSG,
2425                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2426                 }
2427                 if (iwpm_valid_pid() && !iwpm_err) {
2428                         nes_form_pm_msg(cm_info, &pm_msg);
2429                         iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2430                         if (iwpm_err)
2431                                 nes_debug(NES_DBG_NLMSG,
2432                                 "Port Mapper query fail (err = %d).\n", iwpm_err);
2433                         else
2434                                 nes_record_pm_msg(cm_info, &pm_msg);
2435                 }
2436
2437                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2438                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2439                 if (!listener) {
2440                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2441                         return NULL;
2442                 }
2443
2444                 listener->loc_addr = cm_info->loc_addr;
2445                 listener->loc_port = cm_info->loc_port;
2446                 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2447                 listener->mapped_loc_port = cm_info->mapped_loc_port;
2448                 listener->reused_node = 0;
2449
2450                 atomic_set(&listener->ref_count, 1);
2451         }
2452         /* pasive case */
2453         /* find already inc'ed the ref count */
2454         else {
2455                 listener->reused_node = 1;
2456         }
2457
2458         listener->cm_id = cm_info->cm_id;
2459         atomic_set(&listener->pend_accepts_cnt, 0);
2460         listener->cm_core = cm_core;
2461         listener->nesvnic = nesvnic;
2462         atomic_inc(&cm_core->node_cnt);
2463
2464         listener->conn_type = cm_info->conn_type;
2465         listener->backlog = cm_info->backlog;
2466         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2467
2468         if (!listener->reused_node) {
2469                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2470                 list_add(&listener->list, &cm_core->listen_list.list);
2471                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2472                 atomic_inc(&cm_core->listen_node_cnt);
2473         }
2474
2475         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2476                   " listener = %p, backlog = %d, cm_id = %p.\n",
2477                   cm_info->loc_addr, cm_info->loc_port,
2478                   listener, listener->backlog, listener->cm_id);
2479
2480         return listener;
2481 }
2482
2483
2484 /**
2485  * mini_cm_connect - make a connection node with params
2486  */
2487 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2488                                            struct nes_vnic *nesvnic, u16 private_data_len,
2489                                            void *private_data, struct nes_cm_info *cm_info)
2490 {
2491         int ret = 0;
2492         struct nes_cm_node *cm_node;
2493         struct nes_cm_listener *loopbackremotelistener;
2494         struct nes_cm_node *loopbackremotenode;
2495         struct nes_cm_info loopback_cm_info;
2496         u8 *start_buff;
2497
2498         /* create a CM connection node */
2499         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2500         if (!cm_node)
2501                 return NULL;
2502
2503         /* set our node side to client (active) side */
2504         cm_node->tcp_cntxt.client = 1;
2505         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2506
2507         if (cm_info->loc_addr == cm_info->rem_addr) {
2508                 loopbackremotelistener = find_listener(cm_core,
2509                         cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2510                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2511                 if (loopbackremotelistener == NULL) {
2512                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2513                 } else {
2514                         loopback_cm_info = *cm_info;
2515                         loopback_cm_info.loc_port = cm_info->rem_port;
2516                         loopback_cm_info.rem_port = cm_info->loc_port;
2517                         loopback_cm_info.mapped_loc_port =
2518                                 cm_info->mapped_rem_port;
2519                         loopback_cm_info.mapped_rem_port =
2520                                 cm_info->mapped_loc_port;
2521                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2522                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2523                                                           &loopback_cm_info, loopbackremotelistener);
2524                         if (!loopbackremotenode) {
2525                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2526                                 return NULL;
2527                         }
2528                         atomic_inc(&cm_loopbacks);
2529                         loopbackremotenode->loopbackpartner = cm_node;
2530                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2531                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2532                         cm_node->loopbackpartner = loopbackremotenode;
2533                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2534                                private_data_len);
2535                         loopbackremotenode->mpa_frame_size = private_data_len;
2536
2537                         /* we are done handling this state. */
2538                         /* set node to a TSA state */
2539                         cm_node->state = NES_CM_STATE_TSA;
2540                         cm_node->tcp_cntxt.rcv_nxt =
2541                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2542                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2543                                 cm_node->tcp_cntxt.loc_seq_num;
2544                         cm_node->tcp_cntxt.max_snd_wnd =
2545                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2546                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2547                                 cm_node->tcp_cntxt.rcv_wnd;
2548                         cm_node->tcp_cntxt.snd_wnd =
2549                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2550                         loopbackremotenode->tcp_cntxt.snd_wnd =
2551                                 cm_node->tcp_cntxt.rcv_wnd;
2552                         cm_node->tcp_cntxt.snd_wscale =
2553                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2554                         loopbackremotenode->tcp_cntxt.snd_wscale =
2555                                 cm_node->tcp_cntxt.rcv_wscale;
2556                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2557                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2558                 }
2559                 return cm_node;
2560         }
2561
2562         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2563         cm_node->mpa_frame_size = private_data_len;
2564
2565         memcpy(start_buff, private_data, private_data_len);
2566
2567         /* send a syn and goto syn sent state */
2568         cm_node->state = NES_CM_STATE_SYN_SENT;
2569         ret = send_syn(cm_node, 0, NULL);
2570
2571         if (ret) {
2572                 /* error in sending the syn free up the cm_node struct */
2573                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2574                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2575                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2576                           cm_node->cm_id);
2577                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2578                 cm_node = NULL;
2579         }
2580
2581         if (cm_node) {
2582                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2583                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2584                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2585                           cm_node->cm_id);
2586         }
2587
2588         return cm_node;
2589 }
2590
2591
2592 /**
2593  * mini_cm_accept - accept a connection
2594  * This function is never called
2595  */
2596 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2597 {
2598         return 0;
2599 }
2600
2601
2602 /**
2603  * mini_cm_reject - reject and teardown a connection
2604  */
2605 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2606 {
2607         int ret = 0;
2608         int err = 0;
2609         int passive_state;
2610         struct nes_cm_event event;
2611         struct iw_cm_id *cm_id = cm_node->cm_id;
2612         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2613
2614         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2615                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2616
2617         if (cm_node->tcp_cntxt.client)
2618                 return ret;
2619         cleanup_retrans_entry(cm_node);
2620
2621         if (!loopback) {
2622                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2623                 if (passive_state == NES_SEND_RESET_EVENT) {
2624                         cm_node->state = NES_CM_STATE_CLOSED;
2625                         rem_ref_cm_node(cm_core, cm_node);
2626                 } else {
2627                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2628                                 rem_ref_cm_node(cm_core, cm_node);
2629                         } else {
2630                                 ret = send_mpa_reject(cm_node);
2631                                 if (ret) {
2632                                         cm_node->state = NES_CM_STATE_CLOSED;
2633                                         err = send_reset(cm_node, NULL);
2634                                         if (err)
2635                                                 WARN_ON(1);
2636                                 } else {
2637                                         cm_id->add_ref(cm_id);
2638                                 }
2639                         }
2640                 }
2641         } else {
2642                 cm_node->cm_id = NULL;
2643                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2644                         rem_ref_cm_node(cm_core, cm_node);
2645                         rem_ref_cm_node(cm_core, loopback);
2646                 } else {
2647                         event.cm_node = loopback;
2648                         event.cm_info.rem_addr = loopback->rem_addr;
2649                         event.cm_info.loc_addr = loopback->loc_addr;
2650                         event.cm_info.rem_port = loopback->rem_port;
2651                         event.cm_info.loc_port = loopback->loc_port;
2652                         event.cm_info.cm_id = loopback->cm_id;
2653                         cm_event_mpa_reject(&event);
2654                         rem_ref_cm_node(cm_core, cm_node);
2655                         loopback->state = NES_CM_STATE_CLOSING;
2656
2657                         cm_id = loopback->cm_id;
2658                         rem_ref_cm_node(cm_core, loopback);
2659                         cm_id->rem_ref(cm_id);
2660                 }
2661         }
2662
2663         return ret;
2664 }
2665
2666
2667 /**
2668  * mini_cm_close
2669  */
2670 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2671 {
2672         int ret = 0;
2673
2674         if (!cm_core || !cm_node)
2675                 return -EINVAL;
2676
2677         switch (cm_node->state) {
2678         case NES_CM_STATE_SYN_RCVD:
2679         case NES_CM_STATE_SYN_SENT:
2680         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2681         case NES_CM_STATE_ESTABLISHED:
2682         case NES_CM_STATE_ACCEPTING:
2683         case NES_CM_STATE_MPAREQ_SENT:
2684         case NES_CM_STATE_MPAREQ_RCVD:
2685                 cleanup_retrans_entry(cm_node);
2686                 send_reset(cm_node, NULL);
2687                 break;
2688         case NES_CM_STATE_CLOSE_WAIT:
2689                 cm_node->state = NES_CM_STATE_LAST_ACK;
2690                 send_fin(cm_node, NULL);
2691                 break;
2692         case NES_CM_STATE_FIN_WAIT1:
2693         case NES_CM_STATE_FIN_WAIT2:
2694         case NES_CM_STATE_LAST_ACK:
2695         case NES_CM_STATE_TIME_WAIT:
2696         case NES_CM_STATE_CLOSING:
2697                 ret = -1;
2698                 break;
2699         case NES_CM_STATE_LISTENING:
2700                 cleanup_retrans_entry(cm_node);
2701                 send_reset(cm_node, NULL);
2702                 break;
2703         case NES_CM_STATE_MPAREJ_RCVD:
2704         case NES_CM_STATE_UNKNOWN:
2705         case NES_CM_STATE_INITED:
2706         case NES_CM_STATE_CLOSED:
2707         case NES_CM_STATE_LISTENER_DESTROYED:
2708                 ret = rem_ref_cm_node(cm_core, cm_node);
2709                 break;
2710         case NES_CM_STATE_TSA:
2711                 if (cm_node->send_entry)
2712                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2713                                "send_entry=%p\n", cm_node->send_entry);
2714                 ret = rem_ref_cm_node(cm_core, cm_node);
2715                 break;
2716         }
2717         return ret;
2718 }
2719
2720
2721 /**
2722  * recv_pkt - recv an ETHERNET packet, and process it through CM
2723  * node state machine
2724  */
2725 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2726                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2727 {
2728         struct nes_cm_node *cm_node = NULL;
2729         struct nes_cm_listener *listener = NULL;
2730         struct iphdr *iph;
2731         struct tcphdr *tcph;
2732         struct nes_cm_info nfo;
2733         int skb_handled = 1;
2734         __be32 tmp_daddr, tmp_saddr;
2735
2736         if (!skb)
2737                 return 0;
2738         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2739                 return 0;
2740
2741         iph = (struct iphdr *)skb->data;
2742         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2743
2744         nfo.loc_addr = ntohl(iph->daddr);
2745         nfo.loc_port = ntohs(tcph->dest);
2746         nfo.rem_addr = ntohl(iph->saddr);
2747         nfo.rem_port = ntohs(tcph->source);
2748
2749         /* If port mapper is available these should be mapped address info */
2750         nfo.mapped_loc_addr = ntohl(iph->daddr);
2751         nfo.mapped_loc_port = ntohs(tcph->dest);
2752         nfo.mapped_rem_addr = ntohl(iph->saddr);
2753         nfo.mapped_rem_port = ntohs(tcph->source);
2754
2755         tmp_daddr = cpu_to_be32(iph->daddr);
2756         tmp_saddr = cpu_to_be32(iph->saddr);
2757
2758         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2759                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2760
2761         do {
2762                 cm_node = find_node(cm_core,
2763                                     nfo.mapped_rem_port, nfo.mapped_rem_addr,
2764                                     nfo.mapped_loc_port, nfo.mapped_loc_addr);
2765
2766                 if (!cm_node) {
2767                         /* Only type of packet accepted are for */
2768                         /* the PASSIVE open (syn only) */
2769                         if ((!tcph->syn) || (tcph->ack)) {
2770                                 skb_handled = 0;
2771                                 break;
2772                         }
2773                         listener = find_listener(cm_core, nfo.mapped_loc_addr,
2774                                         nfo.mapped_loc_port,
2775                                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2776                         if (!listener) {
2777                                 nfo.cm_id = NULL;
2778                                 nfo.conn_type = 0;
2779                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2780                                 skb_handled = 0;
2781                                 break;
2782                         }
2783                         nfo.cm_id = listener->cm_id;
2784                         nfo.conn_type = listener->conn_type;
2785                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2786                                                listener);
2787                         if (!cm_node) {
2788                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2789                                           "node\n");
2790                                 cm_packets_dropped++;
2791                                 atomic_dec(&listener->ref_count);
2792                                 dev_kfree_skb_any(skb);
2793                                 break;
2794                         }
2795                         if (!tcph->rst && !tcph->fin) {
2796                                 cm_node->state = NES_CM_STATE_LISTENING;
2797                         } else {
2798                                 cm_packets_dropped++;
2799                                 rem_ref_cm_node(cm_core, cm_node);
2800                                 dev_kfree_skb_any(skb);
2801                                 break;
2802                         }
2803                         add_ref_cm_node(cm_node);
2804                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2805                         if (cm_node->nesqp->pau_mode)
2806                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2807                         else {
2808                                 rem_ref_cm_node(cm_core, cm_node);
2809                                 atomic_inc(&cm_accel_dropped_pkts);
2810                                 dev_kfree_skb_any(skb);
2811                         }
2812                         break;
2813                 }
2814                 skb_reset_network_header(skb);
2815                 skb_set_transport_header(skb, sizeof(*tcph));
2816                 skb->len = ntohs(iph->tot_len);
2817                 process_packet(cm_node, skb, cm_core);
2818                 rem_ref_cm_node(cm_core, cm_node);
2819         } while (0);
2820         return skb_handled;
2821 }
2822
2823
2824 /**
2825  * nes_cm_alloc_core - allocate a top level instance of a cm core
2826  */
2827 static struct nes_cm_core *nes_cm_alloc_core(void)
2828 {
2829         struct nes_cm_core *cm_core;
2830
2831         /* setup the CM core */
2832         /* alloc top level core control structure */
2833         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2834         if (!cm_core)
2835                 return NULL;
2836
2837         INIT_LIST_HEAD(&cm_core->connected_nodes);
2838         init_timer(&cm_core->tcp_timer);
2839         cm_core->tcp_timer.function = nes_cm_timer_tick;
2840
2841         cm_core->mtu = NES_CM_DEFAULT_MTU;
2842         cm_core->state = NES_CM_STATE_INITED;
2843         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2844
2845         atomic_set(&cm_core->events_posted, 0);
2846
2847         cm_core->api = &nes_cm_api;
2848
2849         spin_lock_init(&cm_core->ht_lock);
2850         spin_lock_init(&cm_core->listen_list_lock);
2851
2852         INIT_LIST_HEAD(&cm_core->listen_list.list);
2853
2854         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2855
2856         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2857         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2858         cm_core->post_event = nes_cm_post_event;
2859         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2860         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2861
2862         print_core(cm_core);
2863         return cm_core;
2864 }
2865
2866
2867 /**
2868  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2869  */
2870 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2871 {
2872         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2873
2874         if (!cm_core)
2875                 return -EINVAL;
2876
2877         barrier();
2878
2879         if (timer_pending(&cm_core->tcp_timer))
2880                 del_timer(&cm_core->tcp_timer);
2881
2882         destroy_workqueue(cm_core->event_wq);
2883         destroy_workqueue(cm_core->disconn_wq);
2884         nes_debug(NES_DBG_CM, "\n");
2885         kfree(cm_core);
2886
2887         return 0;
2888 }
2889
2890
2891 /**
2892  * mini_cm_get
2893  */
2894 static int mini_cm_get(struct nes_cm_core *cm_core)
2895 {
2896         return cm_core->state;
2897 }
2898
2899
2900 /**
2901  * mini_cm_set
2902  */
2903 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2904 {
2905         int ret = 0;
2906
2907         switch (type) {
2908         case NES_CM_SET_PKT_SIZE:
2909                 cm_core->mtu = value;
2910                 break;
2911         case NES_CM_SET_FREE_PKT_Q_SIZE:
2912                 cm_core->free_tx_pkt_max = value;
2913                 break;
2914         default:
2915                 /* unknown set option */
2916                 ret = -EINVAL;
2917         }
2918
2919         return ret;
2920 }
2921
2922
2923 /**
2924  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2925  * successfully exchanged when this is called
2926  */
2927 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2928 {
2929         int ret = 0;
2930
2931         if (!nesqp)
2932                 return -EINVAL;
2933
2934         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2935                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2936                                                   NES_QPCONTEXT_MISC_DROS);
2937
2938         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2939                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2940
2941         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2942
2943         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2944                 cm_node->tos << NES_QPCONTEXT_MISC2_TOS_SHIFT);
2945
2946         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2947
2948         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2949                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2950
2951         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2952                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2953                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2954
2955         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2956                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2957                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2958
2959         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2960         nesqp->nesqp_context->ts_recent = 0;
2961         nesqp->nesqp_context->ts_age = 0;
2962         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2963         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2964         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2965         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2966                                                     cm_node->tcp_cntxt.rcv_wscale);
2967         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2968         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2969         nesqp->nesqp_context->srtt = 0;
2970         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2971         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2972         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2973         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2974         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2975         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2976
2977         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2978                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2979                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2980                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2981                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2982                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2983                   le32_to_cpu(nesqp->nesqp_context->misc));
2984         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2985         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2986         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2987
2988         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2989         cm_node->state = NES_CM_STATE_TSA;
2990
2991         return ret;
2992 }
2993
2994
2995 /**
2996  * nes_cm_disconn
2997  */
2998 int nes_cm_disconn(struct nes_qp *nesqp)
2999 {
3000         struct disconn_work *work;
3001
3002         work = kzalloc(sizeof *work, GFP_ATOMIC);
3003         if (!work)
3004                 return -ENOMEM;  /* Timer will clean up */
3005
3006         nes_add_ref(&nesqp->ibqp);
3007         work->nesqp = nesqp;
3008         INIT_WORK(&work->work, nes_disconnect_worker);
3009         queue_work(g_cm_core->disconn_wq, &work->work);
3010         return 0;
3011 }
3012
3013
3014 /**
3015  * nes_disconnect_worker
3016  */
3017 static void nes_disconnect_worker(struct work_struct *work)
3018 {
3019         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3020         struct nes_qp *nesqp = dwork->nesqp;
3021
3022         kfree(dwork);
3023         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3024                   nesqp->last_aeq, nesqp->hwqp.qp_id);
3025         nes_cm_disconn_true(nesqp);
3026         nes_rem_ref(&nesqp->ibqp);
3027 }
3028
3029
3030 /**
3031  * nes_cm_disconn_true
3032  */
3033 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3034 {
3035         unsigned long flags;
3036         int ret = 0;
3037         struct iw_cm_id *cm_id;
3038         struct iw_cm_event cm_event;
3039         struct nes_vnic *nesvnic;
3040         u16 last_ae;
3041         u8 original_hw_tcp_state;
3042         u8 original_ibqp_state;
3043         int disconn_status = 0;
3044         int issue_disconn = 0;
3045         int issue_close = 0;
3046         int issue_flush = 0;
3047         u32 flush_q = NES_CQP_FLUSH_RQ;
3048         struct ib_event ibevent;
3049
3050         if (!nesqp) {
3051                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3052                 return -1;
3053         }
3054
3055         spin_lock_irqsave(&nesqp->lock, flags);
3056         cm_id = nesqp->cm_id;
3057         /* make sure we havent already closed this connection */
3058         if (!cm_id) {
3059                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3060                           nesqp->hwqp.qp_id);
3061                 spin_unlock_irqrestore(&nesqp->lock, flags);
3062                 return -1;
3063         }
3064
3065         nesvnic = to_nesvnic(nesqp->ibqp.device);
3066         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3067
3068         original_hw_tcp_state = nesqp->hw_tcp_state;
3069         original_ibqp_state = nesqp->ibqp_state;
3070         last_ae = nesqp->last_aeq;
3071
3072         if (nesqp->term_flags) {
3073                 issue_disconn = 1;
3074                 issue_close = 1;
3075                 nesqp->cm_id = NULL;
3076                 del_timer(&nesqp->terminate_timer);
3077                 if (nesqp->flush_issued == 0) {
3078                         nesqp->flush_issued = 1;
3079                         issue_flush = 1;
3080                 }
3081         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3082                         ((original_ibqp_state == IB_QPS_RTS) &&
3083                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3084                 issue_disconn = 1;
3085                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3086                         disconn_status = -ECONNRESET;
3087         }
3088
3089         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3090                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3091                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3092                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3093                 issue_close = 1;
3094                 nesqp->cm_id = NULL;
3095                 if (nesqp->flush_issued == 0) {
3096                         nesqp->flush_issued = 1;
3097                         issue_flush = 1;
3098                 }
3099         }
3100
3101         spin_unlock_irqrestore(&nesqp->lock, flags);
3102
3103         if ((issue_flush) && (nesqp->destroyed == 0)) {
3104                 /* Flush the queue(s) */
3105                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3106                         flush_q |= NES_CQP_FLUSH_SQ;
3107                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3108
3109                 if (nesqp->term_flags) {
3110                         ibevent.device = nesqp->ibqp.device;
3111                         ibevent.event = nesqp->terminate_eventtype;
3112                         ibevent.element.qp = &nesqp->ibqp;
3113                         if (nesqp->ibqp.event_handler)
3114                                 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3115                 }
3116         }
3117
3118         if ((cm_id) && (cm_id->event_handler)) {
3119                 if (issue_disconn) {
3120                         atomic_inc(&cm_disconnects);
3121                         cm_event.event = IW_CM_EVENT_DISCONNECT;
3122                         cm_event.status = disconn_status;
3123                         cm_event.local_addr = cm_id->local_addr;
3124                         cm_event.remote_addr = cm_id->remote_addr;
3125                         cm_event.private_data = NULL;
3126                         cm_event.private_data_len = 0;
3127
3128                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3129                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
3130                                   "cm_id = %p, refcount = %u.\n",
3131                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3132                                   nesqp->hwqp.sq_tail, cm_id,
3133                                   atomic_read(&nesqp->refcount));
3134
3135                         ret = cm_id->event_handler(cm_id, &cm_event);
3136                         if (ret)
3137                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3138                                           "returned, ret=%d\n", ret);
3139                 }
3140
3141                 if (issue_close) {
3142                         atomic_inc(&cm_closes);
3143                         nes_disconnect(nesqp, 1);
3144
3145                         cm_id->provider_data = nesqp;
3146                         /* Send up the close complete event */
3147                         cm_event.event = IW_CM_EVENT_CLOSE;
3148                         cm_event.status = 0;
3149                         cm_event.provider_data = cm_id->provider_data;
3150                         cm_event.local_addr = cm_id->local_addr;
3151                         cm_event.remote_addr = cm_id->remote_addr;
3152                         cm_event.private_data = NULL;
3153                         cm_event.private_data_len = 0;
3154
3155                         ret = cm_id->event_handler(cm_id, &cm_event);
3156                         if (ret)
3157                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3158
3159                         cm_id->rem_ref(cm_id);
3160                 }
3161         }
3162
3163         return 0;
3164 }
3165
3166
3167 /**
3168  * nes_disconnect
3169  */
3170 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3171 {
3172         int ret = 0;
3173         struct nes_vnic *nesvnic;
3174         struct nes_device *nesdev;
3175         struct nes_ib_device *nesibdev;
3176
3177         nesvnic = to_nesvnic(nesqp->ibqp.device);
3178         if (!nesvnic)
3179                 return -EINVAL;
3180
3181         nesdev = nesvnic->nesdev;
3182         nesibdev = nesvnic->nesibdev;
3183
3184         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3185                         netdev_refcnt_read(nesvnic->netdev));
3186
3187         if (nesqp->active_conn) {
3188
3189                 /* indicate this connection is NOT active */
3190                 nesqp->active_conn = 0;
3191         } else {
3192                 /* Need to free the Last Streaming Mode Message */
3193                 if (nesqp->ietf_frame) {
3194                         if (nesqp->lsmm_mr)
3195                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3196                         pci_free_consistent(nesdev->pcidev,
3197                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3198                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3199                 }
3200         }
3201
3202         /* close the CM node down if it is still active */
3203         if (nesqp->cm_node) {
3204                 nes_debug(NES_DBG_CM, "Call close API\n");
3205
3206                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3207         }
3208
3209         return ret;
3210 }
3211
3212
3213 /**
3214  * nes_accept
3215  */
3216 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3217 {
3218         u64 u64temp;
3219         struct ib_qp *ibqp;
3220         struct nes_qp *nesqp;
3221         struct nes_vnic *nesvnic;
3222         struct nes_device *nesdev;
3223         struct nes_cm_node *cm_node;
3224         struct nes_adapter *adapter;
3225         struct ib_qp_attr attr;
3226         struct iw_cm_event cm_event;
3227         struct nes_hw_qp_wqe *wqe;
3228         struct nes_v4_quad nes_quad;
3229         u32 crc_value;
3230         int ret;
3231         int passive_state;
3232         struct nes_ib_device *nesibdev;
3233         struct ib_mr *ibmr = NULL;
3234         struct ib_phys_buf ibphysbuf;
3235         struct nes_pd *nespd;
3236         u64 tagged_offset;
3237         u8 mpa_frame_offset = 0;
3238         struct ietf_mpa_v2 *mpa_v2_frame;
3239         u8 start_addr = 0;
3240         u8 *start_ptr = &start_addr;
3241         u8 **start_buff = &start_ptr;
3242         u16 buff_len = 0;
3243         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3244         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3245
3246         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3247         if (!ibqp)
3248                 return -EINVAL;
3249
3250         /* get all our handles */
3251         nesqp = to_nesqp(ibqp);
3252         nesvnic = to_nesvnic(nesqp->ibqp.device);
3253         nesdev = nesvnic->nesdev;
3254         adapter = nesdev->nesadapter;
3255
3256         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3257         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3258                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3259                 nesvnic->netdev->name);
3260
3261         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3262                 if (cm_node->loopbackpartner)
3263                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3264                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3265                 return -EINVAL;
3266         }
3267
3268         passive_state = atomic_add_return(1, &cm_node->passive_state);
3269         if (passive_state == NES_SEND_RESET_EVENT) {
3270                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3271                 return -ECONNRESET;
3272         }
3273         /* associate the node with the QP */
3274         nesqp->cm_node = (void *)cm_node;
3275         cm_node->nesqp = nesqp;
3276
3277
3278         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3279                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3280         atomic_inc(&cm_accepts);
3281
3282         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3283                         netdev_refcnt_read(nesvnic->netdev));
3284
3285         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3286         /* allocate the ietf frame and space for private data */
3287         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3288                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3289                                                  &nesqp->ietf_frame_pbase);
3290
3291         if (!nesqp->ietf_frame) {
3292                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3293                 return -ENOMEM;
3294         }
3295         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3296
3297         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3298                 mpa_frame_offset = 4;
3299
3300         if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3301                         cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3302                 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3303         }
3304
3305         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3306                conn_param->private_data_len);
3307
3308         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3309         nesqp->private_data_len = conn_param->private_data_len;
3310
3311         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3312         wqe = &nesqp->hwqp.sq_vbase[0];
3313
3314         if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3315                 u64temp = (unsigned long)nesqp;
3316                 nesibdev = nesvnic->nesibdev;
3317                 nespd = nesqp->nespd;
3318                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3319                 ibphysbuf.size = buff_len;
3320                 tagged_offset = (u64)(unsigned long)*start_buff;
3321                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3322                                                    &ibphysbuf, 1,
3323                                                    IB_ACCESS_LOCAL_WRITE,
3324                                                    &tagged_offset);
3325                 if (!ibmr) {
3326                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3327                                   "for lSMM for cm_node = %p \n",
3328                                   cm_node);
3329                         pci_free_consistent(nesdev->pcidev,
3330                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3331                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3332                         return -ENOMEM;
3333                 }
3334
3335                 ibmr->pd = &nespd->ibpd;
3336                 ibmr->device = nespd->ibpd.device;
3337                 nesqp->lsmm_mr = ibmr;
3338
3339                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3340                 set_wqe_64bit_value(wqe->wqe_words,
3341                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3342                                     u64temp);
3343                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3344                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3345                                     NES_IWARP_SQ_WQE_WRPDU);
3346                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3347                         cpu_to_le32(buff_len);
3348                 set_wqe_64bit_value(wqe->wqe_words,
3349                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3350                                     (u64)(unsigned long)(*start_buff));
3351                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3352                         cpu_to_le32(buff_len);
3353                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3354                 if (nesqp->sq_kmapped) {
3355                         nesqp->sq_kmapped = 0;
3356                         kunmap(nesqp->page);
3357                 }
3358
3359                 nesqp->nesqp_context->ird_ord_sizes |=
3360                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3361                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3362         } else {
3363                 nesqp->nesqp_context->ird_ord_sizes |=
3364                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3365         }
3366         nesqp->skip_lsmm = 1;
3367
3368         /* Cache the cm_id in the qp */
3369         nesqp->cm_id = cm_id;
3370         cm_node->cm_id = cm_id;
3371
3372         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3373         cm_id->provider_data = nesqp;
3374         nesqp->active_conn = 0;
3375
3376         if (cm_node->state == NES_CM_STATE_TSA)
3377                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3378                           cm_node);
3379
3380         nes_cm_init_tsa_conn(nesqp, cm_node);
3381
3382         nesqp->nesqp_context->tcpPorts[0] =
3383                                 cpu_to_le16(cm_node->mapped_loc_port);
3384         nesqp->nesqp_context->tcpPorts[1] =
3385                                 cpu_to_le16(cm_node->mapped_rem_port);
3386
3387         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3388
3389         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3390                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3391                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3392
3393         nesqp->nesqp_context->arp_index_vlan |=
3394                 cpu_to_le32(nes_arp_table(nesdev,
3395                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3396                                           NES_ARP_RESOLVE) << 16);
3397
3398         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3399                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3400
3401         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3402
3403         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3404                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3405         nesqp->nesqp_context->ird_ord_sizes |=
3406                 cpu_to_le32((u32)cm_node->ord_size);
3407
3408         memset(&nes_quad, 0, sizeof(nes_quad));
3409         nes_quad.DstIpAdrIndex =
3410                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3411         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3412         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3413         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3414
3415         /* Produce hash key */
3416         crc_value = get_crc_value(&nes_quad);
3417         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3418         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3419                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3420
3421         nesqp->hte_index &= adapter->hte_index_mask;
3422         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3423
3424         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3425
3426         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3427                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3428                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3429                   ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3430                   ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3431                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3432                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3433                   buff_len);
3434
3435         /* notify OF layer that accept event was successful */
3436         cm_id->add_ref(cm_id);
3437         nes_add_ref(&nesqp->ibqp);
3438
3439         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3440         cm_event.status = 0;
3441         cm_event.provider_data = (void *)nesqp;
3442         cm_event.local_addr = cm_id->local_addr;
3443         cm_event.remote_addr = cm_id->remote_addr;
3444         cm_event.private_data = NULL;
3445         cm_event.private_data_len = 0;
3446         cm_event.ird = cm_node->ird_size;
3447         cm_event.ord = cm_node->ord_size;
3448
3449         ret = cm_id->event_handler(cm_id, &cm_event);
3450         attr.qp_state = IB_QPS_RTS;
3451         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3452         if (cm_node->loopbackpartner) {
3453                 cm_node->loopbackpartner->mpa_frame_size =
3454                         nesqp->private_data_len;
3455                 /* copy entire MPA frame to our cm_node's frame */
3456                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3457                        conn_param->private_data, conn_param->private_data_len);
3458                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3459         }
3460         if (ret)
3461                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3462                        "ret=%d\n", __func__, __LINE__, ret);
3463
3464         return 0;
3465 }
3466
3467
3468 /**
3469  * nes_reject
3470  */
3471 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3472 {
3473         struct nes_cm_node *cm_node;
3474         struct nes_cm_node *loopback;
3475         struct nes_cm_core *cm_core;
3476         u8 *start_buff;
3477
3478         atomic_inc(&cm_rejects);
3479         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3480         loopback = cm_node->loopbackpartner;
3481         cm_core = cm_node->cm_core;
3482         cm_node->cm_id = cm_id;
3483
3484         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3485                 return -EINVAL;
3486
3487         if (loopback) {
3488                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3489                 loopback->mpa_frame.priv_data_len = pdata_len;
3490                 loopback->mpa_frame_size = pdata_len;
3491         } else {
3492                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3493                 cm_node->mpa_frame_size = pdata_len;
3494                 memcpy(start_buff, pdata, pdata_len);
3495         }
3496         return cm_core->api->reject(cm_core, cm_node);
3497 }
3498
3499
3500 /**
3501  * nes_connect
3502  * setup and launch cm connect node
3503  */
3504 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3505 {
3506         struct ib_qp *ibqp;
3507         struct nes_qp *nesqp;
3508         struct nes_vnic *nesvnic;
3509         struct nes_device *nesdev;
3510         struct nes_cm_node *cm_node;
3511         struct nes_cm_info cm_info;
3512         int apbvt_set = 0;
3513         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3514         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3515         struct iwpm_dev_data pm_reg_msg;
3516         struct iwpm_sa_data pm_msg;
3517         int iwpm_err = 0;
3518
3519         if (cm_id->remote_addr.ss_family != AF_INET)
3520                 return -ENOSYS;
3521         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3522         if (!ibqp)
3523                 return -EINVAL;
3524         nesqp = to_nesqp(ibqp);
3525         if (!nesqp)
3526                 return -EINVAL;
3527         nesvnic = to_nesvnic(nesqp->ibqp.device);
3528         if (!nesvnic)
3529                 return -EINVAL;
3530         nesdev = nesvnic->nesdev;
3531         if (!nesdev)
3532                 return -EINVAL;
3533
3534         if (!laddr->sin_port || !raddr->sin_port)
3535                 return -EINVAL;
3536
3537         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3538                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3539                   ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3540                   ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3541                   ntohs(laddr->sin_port));
3542
3543         atomic_inc(&cm_connects);
3544         nesqp->active_conn = 1;
3545
3546         /* cache the cm_id in the qp */
3547         nesqp->cm_id = cm_id;
3548         cm_id->provider_data = nesqp;
3549         nesqp->private_data_len = conn_param->private_data_len;
3550
3551         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3552         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3553                   conn_param->private_data_len);
3554
3555         /* set up the connection params for the node */
3556         cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3557         cm_info.loc_port = ntohs(laddr->sin_port);
3558         cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3559         cm_info.rem_port = ntohs(raddr->sin_port);
3560         cm_info.cm_id = cm_id;
3561         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3562
3563         /* No port mapper available, go with the specified peer information */
3564         cm_info.mapped_loc_addr = cm_info.loc_addr;
3565         cm_info.mapped_loc_port = cm_info.loc_port;
3566         cm_info.mapped_rem_addr = cm_info.rem_addr;
3567         cm_info.mapped_rem_port = cm_info.rem_port;
3568
3569         nes_form_reg_msg(nesvnic, &pm_reg_msg);
3570         iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3571         if (iwpm_err) {
3572                 nes_debug(NES_DBG_NLMSG,
3573                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3574         }
3575         if (iwpm_valid_pid() && !iwpm_err) {
3576                 nes_form_pm_msg(&cm_info, &pm_msg);
3577                 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3578                 if (iwpm_err)
3579                         nes_debug(NES_DBG_NLMSG,
3580                         "Port Mapper query fail (err = %d).\n", iwpm_err);
3581                 else
3582                         nes_record_pm_msg(&cm_info, &pm_msg);
3583         }
3584
3585         if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3586                 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3587                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3588                 apbvt_set = 1;
3589         }
3590
3591         if (nes_create_mapinfo(&cm_info))
3592                 return -ENOMEM;
3593
3594         cm_id->add_ref(cm_id);
3595
3596         /* create a connect CM node connection */
3597         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3598                                           conn_param->private_data_len, (void *)conn_param->private_data,
3599                                           &cm_info);
3600         if (!cm_node) {
3601                 if (apbvt_set)
3602                         nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3603                                          PCI_FUNC(nesdev->pcidev->devfn),
3604                                          NES_MANAGE_APBVT_DEL);
3605
3606                 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3607                                 cm_info.mapped_loc_port);
3608                 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3609                         cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3610                 cm_id->rem_ref(cm_id);
3611                 return -ENOMEM;
3612         }
3613
3614         record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3615         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3616                                 cm_node->ord_size == 0)
3617                 cm_node->ord_size = 1;
3618
3619         cm_node->apbvt_set = apbvt_set;
3620         cm_node->tos = cm_id->tos;
3621         nesqp->cm_node = cm_node;
3622         cm_node->nesqp = nesqp;
3623         nes_add_ref(&nesqp->ibqp);
3624
3625         return 0;
3626 }
3627
3628
3629 /**
3630  * nes_create_listen
3631  */
3632 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3633 {
3634         struct nes_vnic *nesvnic;
3635         struct nes_cm_listener *cm_node;
3636         struct nes_cm_info cm_info;
3637         int err;
3638         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3639
3640         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3641                   cm_id, ntohs(laddr->sin_port));
3642
3643         if (cm_id->local_addr.ss_family != AF_INET)
3644                 return -ENOSYS;
3645         nesvnic = to_nesvnic(cm_id->device);
3646         if (!nesvnic)
3647                 return -EINVAL;
3648
3649         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3650                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3651
3652         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3653                         nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3654
3655         /* setup listen params in our api call struct */
3656         cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3657         cm_info.loc_port = ntohs(laddr->sin_port);
3658         cm_info.backlog = backlog;
3659         cm_info.cm_id = cm_id;
3660
3661         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3662
3663         /* No port mapper available, go with the specified info */
3664         cm_info.mapped_loc_addr = cm_info.loc_addr;
3665         cm_info.mapped_loc_port = cm_info.loc_port;
3666
3667         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3668         if (!cm_node) {
3669                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3670                        __func__, __LINE__);
3671                 return -ENOMEM;
3672         }
3673
3674         cm_id->provider_data = cm_node;
3675         cm_node->tos = cm_id->tos;
3676
3677         if (!cm_node->reused_node) {
3678                 if (nes_create_mapinfo(&cm_info))
3679                         return -ENOMEM;
3680
3681                 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3682                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3683                                        NES_MANAGE_APBVT_ADD);
3684                 if (err) {
3685                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3686                                err);
3687                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3688                         return err;
3689                 }
3690                 atomic_inc(&cm_listens_created);
3691         }
3692
3693         cm_id->add_ref(cm_id);
3694         cm_id->provider_data = (void *)cm_node;
3695
3696
3697         return 0;
3698 }
3699
3700
3701 /**
3702  * nes_destroy_listen
3703  */
3704 int nes_destroy_listen(struct iw_cm_id *cm_id)
3705 {
3706         if (cm_id->provider_data)
3707                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3708         else
3709                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3710
3711         cm_id->rem_ref(cm_id);
3712
3713         return 0;
3714 }
3715
3716
3717 /**
3718  * nes_cm_recv
3719  */
3720 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3721 {
3722         int rc = 0;
3723
3724         cm_packets_received++;
3725         if ((g_cm_core) && (g_cm_core->api))
3726                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3727         else
3728                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3729                           " cm is not setup properly.\n");
3730
3731         return rc;
3732 }
3733
3734
3735 /**
3736  * nes_cm_start
3737  * Start and init a cm core module
3738  */
3739 int nes_cm_start(void)
3740 {
3741         nes_debug(NES_DBG_CM, "\n");
3742         /* create the primary CM core, pass this handle to subsequent core inits */
3743         g_cm_core = nes_cm_alloc_core();
3744         if (g_cm_core)
3745                 return 0;
3746         else
3747                 return -ENOMEM;
3748 }
3749
3750
3751 /**
3752  * nes_cm_stop
3753  * stop and dealloc all cm core instances
3754  */
3755 int nes_cm_stop(void)
3756 {
3757         g_cm_core->api->destroy_cm_core(g_cm_core);
3758         return 0;
3759 }
3760
3761
3762 /**
3763  * cm_event_connected
3764  * handle a connected event, setup QPs and HW
3765  */
3766 static void cm_event_connected(struct nes_cm_event *event)
3767 {
3768         struct nes_qp *nesqp;
3769         struct nes_vnic *nesvnic;
3770         struct nes_device *nesdev;
3771         struct nes_cm_node *cm_node;
3772         struct nes_adapter *nesadapter;
3773         struct ib_qp_attr attr;
3774         struct iw_cm_id *cm_id;
3775         struct iw_cm_event cm_event;
3776         struct nes_v4_quad nes_quad;
3777         u32 crc_value;
3778         int ret;
3779         struct sockaddr_in *laddr;
3780         struct sockaddr_in *raddr;
3781         struct sockaddr_in *cm_event_laddr;
3782
3783         /* get all our handles */
3784         cm_node = event->cm_node;
3785         cm_id = cm_node->cm_id;
3786         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3787         nesqp = (struct nes_qp *)cm_id->provider_data;
3788         nesvnic = to_nesvnic(nesqp->ibqp.device);
3789         nesdev = nesvnic->nesdev;
3790         nesadapter = nesdev->nesadapter;
3791         laddr = (struct sockaddr_in *)&cm_id->local_addr;
3792         raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3793         cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3794
3795         if (nesqp->destroyed)
3796                 return;
3797         atomic_inc(&cm_connecteds);
3798         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3799                   " local port 0x%04X. jiffies = %lu.\n",
3800                   nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3801                   ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3802
3803         nes_cm_init_tsa_conn(nesqp, cm_node);
3804
3805         /* set the QP tsa context */
3806         nesqp->nesqp_context->tcpPorts[0] =
3807                         cpu_to_le16(cm_node->mapped_loc_port);
3808         nesqp->nesqp_context->tcpPorts[1] =
3809                         cpu_to_le16(cm_node->mapped_rem_port);
3810         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3811
3812         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3813                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3814                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3815         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3816                         nes_arp_table(nesdev,
3817                         le32_to_cpu(nesqp->nesqp_context->ip0),
3818                         NULL, NES_ARP_RESOLVE) << 16);
3819         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3820                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3821         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3822         nesqp->nesqp_context->ird_ord_sizes |=
3823                         cpu_to_le32((u32)1 <<
3824                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3825         nesqp->nesqp_context->ird_ord_sizes |=
3826                         cpu_to_le32((u32)cm_node->ord_size);
3827
3828         /* Adjust tail for not having a LSMM */
3829         /*nesqp->hwqp.sq_tail = 1;*/
3830
3831         build_rdma0_msg(cm_node, &nesqp);
3832
3833         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3834                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3835
3836         memset(&nes_quad, 0, sizeof(nes_quad));
3837
3838         nes_quad.DstIpAdrIndex =
3839                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3840         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3841         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3842         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3843
3844         /* Produce hash key */
3845         crc_value = get_crc_value(&nes_quad);
3846         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3847         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3848                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3849
3850         nesqp->hte_index &= nesadapter->hte_index_mask;
3851         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3852
3853         nesqp->ietf_frame = &cm_node->mpa_frame;
3854         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3855         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3856
3857         /* notify OF layer we successfully created the requested connection */
3858         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3859         cm_event.status = 0;
3860         cm_event.provider_data = cm_id->provider_data;
3861         cm_event_laddr->sin_family = AF_INET;
3862         cm_event_laddr->sin_port = laddr->sin_port;
3863         cm_event.remote_addr = cm_id->remote_addr;
3864
3865         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3866         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3867         cm_event.ird = cm_node->ird_size;
3868         cm_event.ord = cm_node->ord_size;
3869
3870         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3871         ret = cm_id->event_handler(cm_id, &cm_event);
3872         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3873
3874         if (ret)
3875                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3876                        "ret=%d\n", __func__, __LINE__, ret);
3877         attr.qp_state = IB_QPS_RTS;
3878         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3879
3880         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3881                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3882
3883         return;
3884 }
3885
3886
3887 /**
3888  * cm_event_connect_error
3889  */
3890 static void cm_event_connect_error(struct nes_cm_event *event)
3891 {
3892         struct nes_qp *nesqp;
3893         struct iw_cm_id *cm_id;
3894         struct iw_cm_event cm_event;
3895         /* struct nes_cm_info cm_info; */
3896         int ret;
3897
3898         if (!event->cm_node)
3899                 return;
3900
3901         cm_id = event->cm_node->cm_id;
3902         if (!cm_id)
3903                 return;
3904
3905         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3906         nesqp = cm_id->provider_data;
3907
3908         if (!nesqp)
3909                 return;
3910
3911         /* notify OF layer about this connection error event */
3912         /* cm_id->rem_ref(cm_id); */
3913         nesqp->cm_id = NULL;
3914         cm_id->provider_data = NULL;
3915         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3916         cm_event.status = -ECONNRESET;
3917         cm_event.provider_data = cm_id->provider_data;
3918         cm_event.local_addr = cm_id->local_addr;
3919         cm_event.remote_addr = cm_id->remote_addr;
3920         cm_event.private_data = NULL;
3921         cm_event.private_data_len = 0;
3922
3923 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3924         {
3925                 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3926                                                      &cm_event.local_addr;
3927                 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3928                                                      &cm_event.remote_addr;
3929                 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3930                           cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3931         }
3932 #endif
3933
3934         ret = cm_id->event_handler(cm_id, &cm_event);
3935         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3936         if (ret)
3937                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3938                        "ret=%d\n", __func__, __LINE__, ret);
3939         cm_id->rem_ref(cm_id);
3940
3941         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3942         return;
3943 }
3944
3945
3946 /**
3947  * cm_event_reset
3948  */
3949 static void cm_event_reset(struct nes_cm_event *event)
3950 {
3951         struct nes_qp *nesqp;
3952         struct iw_cm_id *cm_id;
3953         struct iw_cm_event cm_event;
3954         /* struct nes_cm_info cm_info; */
3955         int ret;
3956
3957         if (!event->cm_node)
3958                 return;
3959
3960         if (!event->cm_node->cm_id)
3961                 return;
3962
3963         cm_id = event->cm_node->cm_id;
3964
3965         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3966         nesqp = cm_id->provider_data;
3967         if (!nesqp)
3968                 return;
3969
3970         nesqp->cm_id = NULL;
3971         /* cm_id->provider_data = NULL; */
3972         cm_event.event = IW_CM_EVENT_DISCONNECT;
3973         cm_event.status = -ECONNRESET;
3974         cm_event.provider_data = cm_id->provider_data;
3975         cm_event.local_addr = cm_id->local_addr;
3976         cm_event.remote_addr = cm_id->remote_addr;
3977         cm_event.private_data = NULL;
3978         cm_event.private_data_len = 0;
3979
3980         cm_id->add_ref(cm_id);
3981         ret = cm_id->event_handler(cm_id, &cm_event);
3982         atomic_inc(&cm_closes);
3983         cm_event.event = IW_CM_EVENT_CLOSE;
3984         cm_event.status = 0;
3985         cm_event.provider_data = cm_id->provider_data;
3986         cm_event.local_addr = cm_id->local_addr;
3987         cm_event.remote_addr = cm_id->remote_addr;
3988         cm_event.private_data = NULL;
3989         cm_event.private_data_len = 0;
3990         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3991         ret = cm_id->event_handler(cm_id, &cm_event);
3992
3993         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3994
3995
3996         /* notify OF layer about this connection error event */
3997         cm_id->rem_ref(cm_id);
3998
3999         return;
4000 }
4001
4002
4003 /**
4004  * cm_event_mpa_req
4005  */
4006 static void cm_event_mpa_req(struct nes_cm_event *event)
4007 {
4008         struct iw_cm_id *cm_id;
4009         struct iw_cm_event cm_event;
4010         int ret;
4011         struct nes_cm_node *cm_node;
4012         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4013                                              &cm_event.local_addr;
4014         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4015                                              &cm_event.remote_addr;
4016
4017         cm_node = event->cm_node;
4018         if (!cm_node)
4019                 return;
4020         cm_id = cm_node->cm_id;
4021
4022         atomic_inc(&cm_connect_reqs);
4023         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4024                   cm_node, cm_id, jiffies);
4025
4026         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4027         cm_event.status = 0;
4028         cm_event.provider_data = (void *)cm_node;
4029
4030         cm_event_laddr->sin_family = AF_INET;
4031         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4032         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4033
4034         cm_event_raddr->sin_family = AF_INET;
4035         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4036         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4037         cm_event.private_data = cm_node->mpa_frame_buf;
4038         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4039         if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4040                 cm_event.ird = NES_MAX_IRD;
4041                 cm_event.ord = NES_MAX_ORD;
4042         } else {
4043         cm_event.ird = cm_node->ird_size;
4044         cm_event.ord = cm_node->ord_size;
4045         }
4046
4047         ret = cm_id->event_handler(cm_id, &cm_event);
4048         if (ret)
4049                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4050                        __func__, __LINE__, ret);
4051         return;
4052 }
4053
4054
4055 static void cm_event_mpa_reject(struct nes_cm_event *event)
4056 {
4057         struct iw_cm_id *cm_id;
4058         struct iw_cm_event cm_event;
4059         struct nes_cm_node *cm_node;
4060         int ret;
4061         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4062                                              &cm_event.local_addr;
4063         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4064                                              &cm_event.remote_addr;
4065
4066         cm_node = event->cm_node;
4067         if (!cm_node)
4068                 return;
4069         cm_id = cm_node->cm_id;
4070
4071         atomic_inc(&cm_connect_reqs);
4072         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4073                   cm_node, cm_id, jiffies);
4074
4075         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4076         cm_event.status = -ECONNREFUSED;
4077         cm_event.provider_data = cm_id->provider_data;
4078
4079         cm_event_laddr->sin_family = AF_INET;
4080         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4081         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4082
4083         cm_event_raddr->sin_family = AF_INET;
4084         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4085         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4086
4087         cm_event.private_data = cm_node->mpa_frame_buf;
4088         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4089
4090         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4091                   "remove_addr=%08x\n",
4092                   cm_event_laddr->sin_addr.s_addr,
4093                   cm_event_raddr->sin_addr.s_addr);
4094
4095         ret = cm_id->event_handler(cm_id, &cm_event);
4096         if (ret)
4097                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4098                        __func__, __LINE__, ret);
4099
4100         return;
4101 }
4102
4103
4104 static void nes_cm_event_handler(struct work_struct *);
4105
4106 /**
4107  * nes_cm_post_event
4108  * post an event to the cm event handler
4109  */
4110 static int nes_cm_post_event(struct nes_cm_event *event)
4111 {
4112         atomic_inc(&event->cm_node->cm_core->events_posted);
4113         add_ref_cm_node(event->cm_node);
4114         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4115         INIT_WORK(&event->event_work, nes_cm_event_handler);
4116         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4117                   event->cm_node, event);
4118
4119         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4120
4121         nes_debug(NES_DBG_CM, "Exit\n");
4122         return 0;
4123 }
4124
4125
4126 /**
4127  * nes_cm_event_handler
4128  * worker function to handle cm events
4129  * will free instance of nes_cm_event
4130  */
4131 static void nes_cm_event_handler(struct work_struct *work)
4132 {
4133         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4134                                                   event_work);
4135         struct nes_cm_core *cm_core;
4136
4137         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4138                 return;
4139
4140         cm_core = event->cm_node->cm_core;
4141         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4142                   event, event->type, atomic_read(&cm_core->events_posted));
4143
4144         switch (event->type) {
4145         case NES_CM_EVENT_MPA_REQ:
4146                 cm_event_mpa_req(event);
4147                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4148                           event->cm_node);
4149                 break;
4150         case NES_CM_EVENT_RESET:
4151                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4152                           event->cm_node);
4153                 cm_event_reset(event);
4154                 break;
4155         case NES_CM_EVENT_CONNECTED:
4156                 if ((!event->cm_node->cm_id) ||
4157                     (event->cm_node->state != NES_CM_STATE_TSA))
4158                         break;
4159                 cm_event_connected(event);
4160                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4161                 break;
4162         case NES_CM_EVENT_MPA_REJECT:
4163                 if ((!event->cm_node->cm_id) ||
4164                     (event->cm_node->state == NES_CM_STATE_TSA))
4165                         break;
4166                 cm_event_mpa_reject(event);
4167                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4168                 break;
4169
4170         case NES_CM_EVENT_ABORTED:
4171                 if ((!event->cm_node->cm_id) ||
4172                     (event->cm_node->state == NES_CM_STATE_TSA))
4173                         break;
4174                 cm_event_connect_error(event);
4175                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4176                 break;
4177         case NES_CM_EVENT_DROPPED_PKT:
4178                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4179                 break;
4180         default:
4181                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4182                 break;
4183         }
4184
4185         atomic_dec(&cm_core->events_posted);
4186         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4187         rem_ref_cm_node(cm_core, event->cm_node);
4188         kfree(event);
4189
4190         return;
4191 }