kernel/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         cm_node->netdev = nesvnic->netdev;
1620         cm_node->cm_id = cm_info->cm_id;
1621         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1622
1623         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1624                   cm_node->cm_id);
1625
1626         spin_lock_init(&cm_node->retrans_list_lock);
1627
1628         cm_node->loopbackpartner = NULL;
1629         atomic_set(&cm_node->ref_count, 1);
1630         /* associate our parent CM core */
1631         cm_node->cm_core = cm_core;
1632         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1633         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1634         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1635                                      NES_CM_DEFAULT_RCV_WND_SCALE;
1636         ts = current_kernel_time();
1637         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1638         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1639                                  sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1640         cm_node->tcp_cntxt.rcv_nxt = 0;
1641         /* get a unique session ID , add thread_id to an upcounter to handle race */
1642         atomic_inc(&cm_core->node_cnt);
1643         cm_node->conn_type = cm_info->conn_type;
1644         cm_node->apbvt_set = 0;
1645         cm_node->accept_pend = 0;
1646
1647         cm_node->nesvnic = nesvnic;
1648         /* get some device handles, for arp lookup */
1649         nesdev = nesvnic->nesdev;
1650         nesadapter = nesdev->nesadapter;
1651
1652         cm_node->loopbackpartner = NULL;
1653
1654         /* get the mac addr for the remote node */
1655         oldarpindex = nes_arp_table(nesdev, cm_node->mapped_rem_addr,
1656                                 NULL, NES_ARP_RESOLVE);
1657         arpindex = nes_addr_resolve_neigh(nesvnic,
1658                                 cm_node->mapped_rem_addr, oldarpindex);
1659         if (arpindex < 0) {
1660                 kfree(cm_node);
1661                 return NULL;
1662         }
1663
1664         /* copy the mac addr to node context */
1665         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1666         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1667                   cm_node->rem_mac);
1668
1669         add_hte_node(cm_core, cm_node);
1670         atomic_inc(&cm_nodes_created);
1671
1672         return cm_node;
1673 }
1674
1675
1676 /**
1677  * add_ref_cm_node - destroy an instance of a cm node
1678  */
1679 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1680 {
1681         atomic_inc(&cm_node->ref_count);
1682         return 0;
1683 }
1684
1685
1686 /**
1687  * rem_ref_cm_node - destroy an instance of a cm node
1688  */
1689 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1690                            struct nes_cm_node *cm_node)
1691 {
1692         unsigned long flags;
1693         struct nes_qp *nesqp;
1694
1695         if (!cm_node)
1696                 return -EINVAL;
1697
1698         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1699         if (atomic_dec_return(&cm_node->ref_count)) {
1700                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1701                 return 0;
1702         }
1703         list_del(&cm_node->list);
1704         atomic_dec(&cm_core->ht_node_cnt);
1705         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1706
1707         /* if the node is destroyed before connection was accelerated */
1708         if (!cm_node->accelerated && cm_node->accept_pend) {
1709                 BUG_ON(!cm_node->listener);
1710                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1711                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1712         }
1713         WARN_ON(cm_node->send_entry);
1714         if (cm_node->recv_entry)
1715                 handle_recv_entry(cm_node, 0);
1716         if (cm_node->listener) {
1717                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1718         } else {
1719                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1720                         nes_manage_apbvt(cm_node->nesvnic, cm_node->mapped_loc_port,
1721                                          PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn),
1722                                          NES_MANAGE_APBVT_DEL);
1723                 }
1724                 nes_debug(NES_DBG_NLMSG, "Delete APBVT mapped_loc_port = %04X\n",
1725                                         cm_node->mapped_loc_port);
1726                 nes_remove_mapinfo(cm_node->loc_addr, cm_node->loc_port,
1727                         cm_node->mapped_loc_addr, cm_node->mapped_loc_port);
1728         }
1729
1730         atomic_dec(&cm_core->node_cnt);
1731         atomic_inc(&cm_nodes_destroyed);
1732         nesqp = cm_node->nesqp;
1733         if (nesqp) {
1734                 nesqp->cm_node = NULL;
1735                 nes_rem_ref(&nesqp->ibqp);
1736                 cm_node->nesqp = NULL;
1737         }
1738
1739         kfree(cm_node);
1740         return 0;
1741 }
1742
1743 /**
1744  * process_options
1745  */
1746 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1747                            u32 optionsize, u32 syn_packet)
1748 {
1749         u32 tmp;
1750         u32 offset = 0;
1751         union all_known_options *all_options;
1752         char got_mss_option = 0;
1753
1754         while (offset < optionsize) {
1755                 all_options = (union all_known_options *)(optionsloc + offset);
1756                 switch (all_options->as_base.optionnum) {
1757                 case OPTION_NUMBER_END:
1758                         offset = optionsize;
1759                         break;
1760                 case OPTION_NUMBER_NONE:
1761                         offset += 1;
1762                         continue;
1763                 case OPTION_NUMBER_MSS:
1764                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1765                                   "Size: %d\n", __func__,
1766                                   all_options->as_mss.length, offset, optionsize);
1767                         got_mss_option = 1;
1768                         if (all_options->as_mss.length != 4) {
1769                                 return 1;
1770                         } else {
1771                                 tmp = ntohs(all_options->as_mss.mss);
1772                                 if (tmp > 0 && tmp <
1773                                     cm_node->tcp_cntxt.mss)
1774                                         cm_node->tcp_cntxt.mss = tmp;
1775                         }
1776                         break;
1777                 case OPTION_NUMBER_WINDOW_SCALE:
1778                         cm_node->tcp_cntxt.snd_wscale =
1779                                 all_options->as_windowscale.shiftcount;
1780                         break;
1781                 default:
1782                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1783                                   all_options->as_base.optionnum);
1784                         break;
1785                 }
1786                 offset += all_options->as_base.length;
1787         }
1788         if ((!got_mss_option) && (syn_packet))
1789                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1790         return 0;
1791 }
1792
1793 static void drop_packet(struct sk_buff *skb)
1794 {
1795         atomic_inc(&cm_accel_dropped_pkts);
1796         dev_kfree_skb_any(skb);
1797 }
1798
1799 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1800 {
1801         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1802                   "refcnt=%d\n", cm_node, cm_node->state,
1803                   atomic_read(&cm_node->ref_count));
1804         switch (cm_node->state) {
1805         case NES_CM_STATE_SYN_RCVD:
1806         case NES_CM_STATE_SYN_SENT:
1807         case NES_CM_STATE_ESTABLISHED:
1808         case NES_CM_STATE_MPAREJ_RCVD:
1809                 cm_node->tcp_cntxt.rcv_nxt++;
1810                 cleanup_retrans_entry(cm_node);
1811                 cm_node->state = NES_CM_STATE_LAST_ACK;
1812                 send_fin(cm_node, NULL);
1813                 break;
1814         case NES_CM_STATE_MPAREQ_SENT:
1815                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1816                 cm_node->tcp_cntxt.rcv_nxt++;
1817                 cleanup_retrans_entry(cm_node);
1818                 cm_node->state = NES_CM_STATE_CLOSED;
1819                 add_ref_cm_node(cm_node);
1820                 send_reset(cm_node, NULL);
1821                 break;
1822         case NES_CM_STATE_FIN_WAIT1:
1823                 cm_node->tcp_cntxt.rcv_nxt++;
1824                 cleanup_retrans_entry(cm_node);
1825                 cm_node->state = NES_CM_STATE_CLOSING;
1826                 send_ack(cm_node, NULL);
1827                 /* Wait for ACK as this is simultaneous close..
1828                 * After we receive ACK, do not send anything..
1829                 * Just rm the node.. Done.. */
1830                 break;
1831         case NES_CM_STATE_FIN_WAIT2:
1832                 cm_node->tcp_cntxt.rcv_nxt++;
1833                 cleanup_retrans_entry(cm_node);
1834                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1835                 send_ack(cm_node, NULL);
1836                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1837                 break;
1838         case NES_CM_STATE_TIME_WAIT:
1839                 cm_node->tcp_cntxt.rcv_nxt++;
1840                 cleanup_retrans_entry(cm_node);
1841                 cm_node->state = NES_CM_STATE_CLOSED;
1842                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1843                 break;
1844         case NES_CM_STATE_TSA:
1845         default:
1846                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1847                         cm_node, cm_node->state);
1848                 break;
1849         }
1850 }
1851
1852
1853 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1854         struct tcphdr *tcph)
1855 {
1856
1857         int     reset = 0;      /* whether to send reset in case of err.. */
1858         atomic_inc(&cm_resets_recvd);
1859         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1860                         " refcnt=%d\n", cm_node, cm_node->state,
1861                         atomic_read(&cm_node->ref_count));
1862         cleanup_retrans_entry(cm_node);
1863         switch (cm_node->state) {
1864         case NES_CM_STATE_SYN_SENT:
1865         case NES_CM_STATE_MPAREQ_SENT:
1866                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1867                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1868                         cm_node->listener, cm_node->state);
1869                 switch (cm_node->mpa_frame_rev) {
1870                 case IETF_MPA_V2:
1871                         cm_node->mpa_frame_rev = IETF_MPA_V1;
1872                         /* send a syn and goto syn sent state */
1873                         cm_node->state = NES_CM_STATE_SYN_SENT;
1874                         if (send_syn(cm_node, 0, NULL)) {
1875                                 active_open_err(cm_node, skb, reset);
1876                         }
1877                         break;
1878                 case IETF_MPA_V1:
1879                 default:
1880                         active_open_err(cm_node, skb, reset);
1881                         break;
1882                 }
1883                 break;
1884         case NES_CM_STATE_MPAREQ_RCVD:
1885                 atomic_inc(&cm_node->passive_state);
1886                 dev_kfree_skb_any(skb);
1887                 break;
1888         case NES_CM_STATE_ESTABLISHED:
1889         case NES_CM_STATE_SYN_RCVD:
1890         case NES_CM_STATE_LISTENING:
1891                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1892                 passive_open_err(cm_node, skb, reset);
1893                 break;
1894         case NES_CM_STATE_TSA:
1895                 active_open_err(cm_node, skb, reset);
1896                 break;
1897         case NES_CM_STATE_CLOSED:
1898                 drop_packet(skb);
1899                 break;
1900         case NES_CM_STATE_FIN_WAIT2:
1901         case NES_CM_STATE_FIN_WAIT1:
1902         case NES_CM_STATE_LAST_ACK:
1903                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1904         case NES_CM_STATE_TIME_WAIT:
1905                 cm_node->state = NES_CM_STATE_CLOSED;
1906                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1907                 drop_packet(skb);
1908                 break;
1909         default:
1910                 drop_packet(skb);
1911                 break;
1912         }
1913 }
1914
1915
1916 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1917 {
1918         int ret = 0;
1919         int datasize = skb->len;
1920         u8 *dataloc = skb->data;
1921
1922         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1923         u32 res_type;
1924
1925         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1926         if (ret) {
1927                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1928                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1929                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1930                                   "cm_node=%p listener=%p state=%d\n", __func__,
1931                                   __LINE__, cm_node, cm_node->listener,
1932                                   cm_node->state);
1933                         active_open_err(cm_node, skb, 1);
1934                 } else {
1935                         passive_open_err(cm_node, skb, 1);
1936                 }
1937                 return;
1938         }
1939
1940         switch (cm_node->state) {
1941         case NES_CM_STATE_ESTABLISHED:
1942                 if (res_type == NES_MPA_REQUEST_REJECT)
1943                         /*BIG problem as we are receiving the MPA.. So should
1944                          * not be REJECT.. This is Passive Open.. We can
1945                          * only receive it Reject for Active Open...*/
1946                         WARN_ON(1);
1947                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1948                 type = NES_CM_EVENT_MPA_REQ;
1949                 atomic_set(&cm_node->passive_state,
1950                            NES_PASSIVE_STATE_INDICATED);
1951                 break;
1952         case NES_CM_STATE_MPAREQ_SENT:
1953                 cleanup_retrans_entry(cm_node);
1954                 if (res_type == NES_MPA_REQUEST_REJECT) {
1955                         type = NES_CM_EVENT_MPA_REJECT;
1956                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1957                 } else {
1958                         type = NES_CM_EVENT_CONNECTED;
1959                         cm_node->state = NES_CM_STATE_TSA;
1960                 }
1961
1962                 break;
1963         default:
1964                 WARN_ON(1);
1965                 break;
1966         }
1967         dev_kfree_skb_any(skb);
1968         create_event(cm_node, type);
1969 }
1970
1971 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1972 {
1973         switch (cm_node->state) {
1974         case NES_CM_STATE_SYN_SENT:
1975         case NES_CM_STATE_MPAREQ_SENT:
1976                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1977                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1978                           cm_node->listener, cm_node->state);
1979                 active_open_err(cm_node, skb, 1);
1980                 break;
1981         case NES_CM_STATE_ESTABLISHED:
1982         case NES_CM_STATE_SYN_RCVD:
1983                 passive_open_err(cm_node, skb, 1);
1984                 break;
1985         case NES_CM_STATE_TSA:
1986         default:
1987                 drop_packet(skb);
1988         }
1989 }
1990
1991 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1992                      struct sk_buff *skb)
1993 {
1994         int err;
1995
1996         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1997         if (err)
1998                 active_open_err(cm_node, skb, 1);
1999
2000         return err;
2001 }
2002
2003 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2004                      struct sk_buff *skb)
2005 {
2006         int err = 0;
2007         u32 seq;
2008         u32 ack_seq;
2009         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
2010         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
2011         u32 rcv_wnd;
2012
2013         seq = ntohl(tcph->seq);
2014         ack_seq = ntohl(tcph->ack_seq);
2015         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
2016         if (ack_seq != loc_seq_num)
2017                 err = 1;
2018         else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
2019                 err = 1;
2020         if (err) {
2021                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
2022                           "listener=%p state=%d\n", __func__, __LINE__, cm_node,
2023                           cm_node->listener, cm_node->state);
2024                 indicate_pkt_err(cm_node, skb);
2025                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
2026                           "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
2027                           rcv_wnd);
2028         }
2029         return err;
2030 }
2031
2032 /*
2033  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
2034  * is created with a listener or it may comein as rexmitted packet which in
2035  * that case will be just dropped.
2036  */
2037 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2038                            struct tcphdr *tcph)
2039 {
2040         int ret;
2041         u32 inc_sequence;
2042         int optionsize;
2043
2044         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2045         skb_trim(skb, 0);
2046         inc_sequence = ntohl(tcph->seq);
2047
2048         switch (cm_node->state) {
2049         case NES_CM_STATE_SYN_SENT:
2050         case NES_CM_STATE_MPAREQ_SENT:
2051                 /* Rcvd syn on active open connection*/
2052                 active_open_err(cm_node, skb, 1);
2053                 break;
2054         case NES_CM_STATE_LISTENING:
2055                 /* Passive OPEN */
2056                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
2057                     cm_node->listener->backlog) {
2058                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
2059                                   "pressure \n");
2060                         cm_backlog_drops++;
2061                         passive_open_err(cm_node, skb, 0);
2062                         break;
2063                 }
2064                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
2065                                          1);
2066                 if (ret) {
2067                         passive_open_err(cm_node, skb, 0);
2068                         /* drop pkt */
2069                         break;
2070                 }
2071                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2072                 BUG_ON(cm_node->send_entry);
2073                 cm_node->accept_pend = 1;
2074                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
2075
2076                 cm_node->state = NES_CM_STATE_SYN_RCVD;
2077                 send_syn(cm_node, 1, skb);
2078                 break;
2079         case NES_CM_STATE_CLOSED:
2080                 cleanup_retrans_entry(cm_node);
2081                 add_ref_cm_node(cm_node);
2082                 send_reset(cm_node, skb);
2083                 break;
2084         case NES_CM_STATE_TSA:
2085         case NES_CM_STATE_ESTABLISHED:
2086         case NES_CM_STATE_FIN_WAIT1:
2087         case NES_CM_STATE_FIN_WAIT2:
2088         case NES_CM_STATE_MPAREQ_RCVD:
2089         case NES_CM_STATE_LAST_ACK:
2090         case NES_CM_STATE_CLOSING:
2091         case NES_CM_STATE_UNKNOWN:
2092         default:
2093                 drop_packet(skb);
2094                 break;
2095         }
2096 }
2097
2098 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2099                               struct tcphdr *tcph)
2100 {
2101         int ret;
2102         u32 inc_sequence;
2103         int optionsize;
2104
2105         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2106         skb_trim(skb, 0);
2107         inc_sequence = ntohl(tcph->seq);
2108         switch (cm_node->state) {
2109         case NES_CM_STATE_SYN_SENT:
2110                 cleanup_retrans_entry(cm_node);
2111                 /* active open */
2112                 if (check_syn(cm_node, tcph, skb))
2113                         return;
2114                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2115                 /* setup options */
2116                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
2117                 if (ret) {
2118                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
2119                                   cm_node);
2120                         break;
2121                 }
2122                 cleanup_retrans_entry(cm_node);
2123                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
2124                 send_mpa_request(cm_node, skb);
2125                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
2126                 break;
2127         case NES_CM_STATE_MPAREQ_RCVD:
2128                 /* passive open, so should not be here */
2129                 passive_open_err(cm_node, skb, 1);
2130                 break;
2131         case NES_CM_STATE_LISTENING:
2132                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2133                 cleanup_retrans_entry(cm_node);
2134                 cm_node->state = NES_CM_STATE_CLOSED;
2135                 send_reset(cm_node, skb);
2136                 break;
2137         case NES_CM_STATE_CLOSED:
2138                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
2139                 cleanup_retrans_entry(cm_node);
2140                 add_ref_cm_node(cm_node);
2141                 send_reset(cm_node, skb);
2142                 break;
2143         case NES_CM_STATE_ESTABLISHED:
2144         case NES_CM_STATE_FIN_WAIT1:
2145         case NES_CM_STATE_FIN_WAIT2:
2146         case NES_CM_STATE_LAST_ACK:
2147         case NES_CM_STATE_TSA:
2148         case NES_CM_STATE_CLOSING:
2149         case NES_CM_STATE_UNKNOWN:
2150         case NES_CM_STATE_MPAREQ_SENT:
2151         default:
2152                 drop_packet(skb);
2153                 break;
2154         }
2155 }
2156
2157 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
2158                           struct tcphdr *tcph)
2159 {
2160         int datasize = 0;
2161         u32 inc_sequence;
2162         int ret = 0;
2163         int optionsize;
2164
2165         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
2166
2167         if (check_seq(cm_node, tcph, skb))
2168                 return -EINVAL;
2169
2170         skb_pull(skb, tcph->doff << 2);
2171         inc_sequence = ntohl(tcph->seq);
2172         datasize = skb->len;
2173         switch (cm_node->state) {
2174         case NES_CM_STATE_SYN_RCVD:
2175                 /* Passive OPEN */
2176                 cleanup_retrans_entry(cm_node);
2177                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
2178                 if (ret)
2179                         break;
2180                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2181                 cm_node->state = NES_CM_STATE_ESTABLISHED;
2182                 if (datasize) {
2183                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2184                         nes_get_remote_addr(cm_node);
2185                         handle_rcv_mpa(cm_node, skb);
2186                 } else { /* rcvd ACK only */
2187                         dev_kfree_skb_any(skb);
2188                 }
2189                 break;
2190         case NES_CM_STATE_ESTABLISHED:
2191                 /* Passive OPEN */
2192                 cleanup_retrans_entry(cm_node);
2193                 if (datasize) {
2194                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2195                         handle_rcv_mpa(cm_node, skb);
2196                 } else {
2197                         drop_packet(skb);
2198                 }
2199                 break;
2200         case NES_CM_STATE_MPAREQ_SENT:
2201                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
2202                 if (datasize) {
2203                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
2204                         handle_rcv_mpa(cm_node, skb);
2205                 } else { /* Could be just an ack pkt.. */
2206                         dev_kfree_skb_any(skb);
2207                 }
2208                 break;
2209         case NES_CM_STATE_LISTENING:
2210                 cleanup_retrans_entry(cm_node);
2211                 cm_node->state = NES_CM_STATE_CLOSED;
2212                 send_reset(cm_node, skb);
2213                 break;
2214         case NES_CM_STATE_CLOSED:
2215                 cleanup_retrans_entry(cm_node);
2216                 add_ref_cm_node(cm_node);
2217                 send_reset(cm_node, skb);
2218                 break;
2219         case NES_CM_STATE_LAST_ACK:
2220         case NES_CM_STATE_CLOSING:
2221                 cleanup_retrans_entry(cm_node);
2222                 cm_node->state = NES_CM_STATE_CLOSED;
2223                 cm_node->cm_id->rem_ref(cm_node->cm_id);
2224                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2225                 drop_packet(skb);
2226                 break;
2227         case NES_CM_STATE_FIN_WAIT1:
2228                 cleanup_retrans_entry(cm_node);
2229                 drop_packet(skb);
2230                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2231                 break;
2232         case NES_CM_STATE_SYN_SENT:
2233         case NES_CM_STATE_FIN_WAIT2:
2234         case NES_CM_STATE_TSA:
2235         case NES_CM_STATE_MPAREQ_RCVD:
2236         case NES_CM_STATE_UNKNOWN:
2237         default:
2238                 cleanup_retrans_entry(cm_node);
2239                 drop_packet(skb);
2240                 break;
2241         }
2242         return ret;
2243 }
2244
2245
2246
2247 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2248                               struct sk_buff *skb, int optionsize, int passive)
2249 {
2250         u8 *optionsloc = (u8 *)&tcph[1];
2251
2252         if (optionsize) {
2253                 if (process_options(cm_node, optionsloc, optionsize,
2254                                     (u32)tcph->syn)) {
2255                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2256                                   __func__, cm_node);
2257                         if (passive)
2258                                 passive_open_err(cm_node, skb, 1);
2259                         else
2260                                 active_open_err(cm_node, skb, 1);
2261                         return 1;
2262                 }
2263         }
2264
2265         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2266                                      cm_node->tcp_cntxt.snd_wscale;
2267
2268         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2269                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2270         return 0;
2271 }
2272
2273 /*
2274  * active_open_err() will send reset() if flag set..
2275  * It will also send ABORT event.
2276  */
2277 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2278                             int reset)
2279 {
2280         cleanup_retrans_entry(cm_node);
2281         if (reset) {
2282                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2283                           "state=%d\n", cm_node, cm_node->state);
2284                 add_ref_cm_node(cm_node);
2285                 send_reset(cm_node, skb);
2286         } else {
2287                 dev_kfree_skb_any(skb);
2288         }
2289
2290         cm_node->state = NES_CM_STATE_CLOSED;
2291         create_event(cm_node, NES_CM_EVENT_ABORTED);
2292 }
2293
2294 /*
2295  * passive_open_err() will either do a reset() or will free up the skb and
2296  * remove the cm_node.
2297  */
2298 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2299                              int reset)
2300 {
2301         cleanup_retrans_entry(cm_node);
2302         cm_node->state = NES_CM_STATE_CLOSED;
2303         if (reset) {
2304                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2305                           "cm_node=%p state =%d\n", cm_node, cm_node->state);
2306                 send_reset(cm_node, skb);
2307         } else {
2308                 dev_kfree_skb_any(skb);
2309                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2310         }
2311 }
2312
2313 /*
2314  * free_retrans_entry() routines assumes that the retrans_list_lock has
2315  * been acquired before calling.
2316  */
2317 static void free_retrans_entry(struct nes_cm_node *cm_node)
2318 {
2319         struct nes_timer_entry *send_entry;
2320
2321         send_entry = cm_node->send_entry;
2322         if (send_entry) {
2323                 cm_node->send_entry = NULL;
2324                 dev_kfree_skb_any(send_entry->skb);
2325                 kfree(send_entry);
2326                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2327         }
2328 }
2329
2330 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2331 {
2332         unsigned long flags;
2333
2334         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2335         free_retrans_entry(cm_node);
2336         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2337 }
2338
2339 /**
2340  * process_packet
2341  * Returns skb if to be freed, else it will return NULL if already used..
2342  */
2343 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2344                            struct nes_cm_core *cm_core)
2345 {
2346         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2347         struct tcphdr *tcph = tcp_hdr(skb);
2348         u32 fin_set = 0;
2349         int ret = 0;
2350
2351         skb_pull(skb, ip_hdr(skb)->ihl << 2);
2352
2353         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2354                   "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2355                   tcph->ack, tcph->rst, tcph->fin);
2356
2357         if (tcph->rst) {
2358                 pkt_type = NES_PKT_TYPE_RST;
2359         } else if (tcph->syn) {
2360                 pkt_type = NES_PKT_TYPE_SYN;
2361                 if (tcph->ack)
2362                         pkt_type = NES_PKT_TYPE_SYNACK;
2363         } else if (tcph->ack) {
2364                 pkt_type = NES_PKT_TYPE_ACK;
2365         }
2366         if (tcph->fin)
2367                 fin_set = 1;
2368
2369         switch (pkt_type) {
2370         case NES_PKT_TYPE_SYN:
2371                 handle_syn_pkt(cm_node, skb, tcph);
2372                 break;
2373         case NES_PKT_TYPE_SYNACK:
2374                 handle_synack_pkt(cm_node, skb, tcph);
2375                 break;
2376         case NES_PKT_TYPE_ACK:
2377                 ret = handle_ack_pkt(cm_node, skb, tcph);
2378                 if (fin_set && !ret)
2379                         handle_fin_pkt(cm_node);
2380                 break;
2381         case NES_PKT_TYPE_RST:
2382                 handle_rst_pkt(cm_node, skb, tcph);
2383                 break;
2384         default:
2385                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2386                         handle_fin_pkt(cm_node);
2387                 drop_packet(skb);
2388                 break;
2389         }
2390 }
2391
2392 /**
2393  * mini_cm_listen - create a listen node with params
2394  */
2395 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2396                         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2397 {
2398         struct nes_cm_listener *listener;
2399         struct iwpm_dev_data pm_reg_msg;
2400         struct iwpm_sa_data pm_msg;
2401         unsigned long flags;
2402         int iwpm_err = 0;
2403
2404         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2405                   cm_info->loc_addr, cm_info->loc_port);
2406
2407         /* cannot have multiple matching listeners */
2408         listener = find_listener(cm_core, cm_info->loc_addr, cm_info->loc_port,
2409                                 NES_CM_LISTENER_EITHER_STATE, 1);
2410
2411         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2412                 /* find automatically incs ref count ??? */
2413                 atomic_dec(&listener->ref_count);
2414                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2415                 return NULL;
2416         }
2417
2418         if (!listener) {
2419                 nes_form_reg_msg(nesvnic, &pm_reg_msg);
2420                 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
2421                 if (iwpm_err) {
2422                         nes_debug(NES_DBG_NLMSG,
2423                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
2424                 }
2425                 if (iwpm_valid_pid() && !iwpm_err) {
2426                         nes_form_pm_msg(cm_info, &pm_msg);
2427                         iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_NES);
2428                         if (iwpm_err)
2429                                 nes_debug(NES_DBG_NLMSG,
2430                                 "Port Mapper query fail (err = %d).\n", iwpm_err);
2431                         else
2432                                 nes_record_pm_msg(cm_info, &pm_msg);
2433                 }
2434
2435                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2436                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2437                 if (!listener) {
2438                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2439                         return NULL;
2440                 }
2441
2442                 listener->loc_addr = cm_info->loc_addr;
2443                 listener->loc_port = cm_info->loc_port;
2444                 listener->mapped_loc_addr = cm_info->mapped_loc_addr;
2445                 listener->mapped_loc_port = cm_info->mapped_loc_port;
2446                 listener->reused_node = 0;
2447
2448                 atomic_set(&listener->ref_count, 1);
2449         }
2450         /* pasive case */
2451         /* find already inc'ed the ref count */
2452         else {
2453                 listener->reused_node = 1;
2454         }
2455
2456         listener->cm_id = cm_info->cm_id;
2457         atomic_set(&listener->pend_accepts_cnt, 0);
2458         listener->cm_core = cm_core;
2459         listener->nesvnic = nesvnic;
2460         atomic_inc(&cm_core->node_cnt);
2461
2462         listener->conn_type = cm_info->conn_type;
2463         listener->backlog = cm_info->backlog;
2464         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2465
2466         if (!listener->reused_node) {
2467                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2468                 list_add(&listener->list, &cm_core->listen_list.list);
2469                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2470                 atomic_inc(&cm_core->listen_node_cnt);
2471         }
2472
2473         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2474                   " listener = %p, backlog = %d, cm_id = %p.\n",
2475                   cm_info->loc_addr, cm_info->loc_port,
2476                   listener, listener->backlog, listener->cm_id);
2477
2478         return listener;
2479 }
2480
2481
2482 /**
2483  * mini_cm_connect - make a connection node with params
2484  */
2485 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2486                                            struct nes_vnic *nesvnic, u16 private_data_len,
2487                                            void *private_data, struct nes_cm_info *cm_info)
2488 {
2489         int ret = 0;
2490         struct nes_cm_node *cm_node;
2491         struct nes_cm_listener *loopbackremotelistener;
2492         struct nes_cm_node *loopbackremotenode;
2493         struct nes_cm_info loopback_cm_info;
2494         u8 *start_buff;
2495
2496         /* create a CM connection node */
2497         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2498         if (!cm_node)
2499                 return NULL;
2500
2501         /* set our node side to client (active) side */
2502         cm_node->tcp_cntxt.client = 1;
2503         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2504
2505         if (cm_info->loc_addr == cm_info->rem_addr) {
2506                 loopbackremotelistener = find_listener(cm_core,
2507                         cm_node->mapped_loc_addr, cm_node->mapped_rem_port,
2508                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2509                 if (loopbackremotelistener == NULL) {
2510                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2511                 } else {
2512                         loopback_cm_info = *cm_info;
2513                         loopback_cm_info.loc_port = cm_info->rem_port;
2514                         loopback_cm_info.rem_port = cm_info->loc_port;
2515                         loopback_cm_info.mapped_loc_port =
2516                                 cm_info->mapped_rem_port;
2517                         loopback_cm_info.mapped_rem_port =
2518                                 cm_info->mapped_loc_port;
2519                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2520                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2521                                                           &loopback_cm_info, loopbackremotelistener);
2522                         if (!loopbackremotenode) {
2523                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2524                                 return NULL;
2525                         }
2526                         atomic_inc(&cm_loopbacks);
2527                         loopbackremotenode->loopbackpartner = cm_node;
2528                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2529                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2530                         cm_node->loopbackpartner = loopbackremotenode;
2531                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2532                                private_data_len);
2533                         loopbackremotenode->mpa_frame_size = private_data_len;
2534
2535                         /* we are done handling this state. */
2536                         /* set node to a TSA state */
2537                         cm_node->state = NES_CM_STATE_TSA;
2538                         cm_node->tcp_cntxt.rcv_nxt =
2539                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2540                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2541                                 cm_node->tcp_cntxt.loc_seq_num;
2542                         cm_node->tcp_cntxt.max_snd_wnd =
2543                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2544                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2545                                 cm_node->tcp_cntxt.rcv_wnd;
2546                         cm_node->tcp_cntxt.snd_wnd =
2547                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2548                         loopbackremotenode->tcp_cntxt.snd_wnd =
2549                                 cm_node->tcp_cntxt.rcv_wnd;
2550                         cm_node->tcp_cntxt.snd_wscale =
2551                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2552                         loopbackremotenode->tcp_cntxt.snd_wscale =
2553                                 cm_node->tcp_cntxt.rcv_wscale;
2554                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2555                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2556                 }
2557                 return cm_node;
2558         }
2559
2560         start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2561         cm_node->mpa_frame_size = private_data_len;
2562
2563         memcpy(start_buff, private_data, private_data_len);
2564
2565         /* send a syn and goto syn sent state */
2566         cm_node->state = NES_CM_STATE_SYN_SENT;
2567         ret = send_syn(cm_node, 0, NULL);
2568
2569         if (ret) {
2570                 /* error in sending the syn free up the cm_node struct */
2571                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2572                           "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2573                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2574                           cm_node->cm_id);
2575                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2576                 cm_node = NULL;
2577         }
2578
2579         if (cm_node) {
2580                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2581                           "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2582                           cm_node->rem_addr, cm_node->rem_port, cm_node,
2583                           cm_node->cm_id);
2584         }
2585
2586         return cm_node;
2587 }
2588
2589
2590 /**
2591  * mini_cm_accept - accept a connection
2592  * This function is never called
2593  */
2594 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2595 {
2596         return 0;
2597 }
2598
2599
2600 /**
2601  * mini_cm_reject - reject and teardown a connection
2602  */
2603 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2604 {
2605         int ret = 0;
2606         int err = 0;
2607         int passive_state;
2608         struct nes_cm_event event;
2609         struct iw_cm_id *cm_id = cm_node->cm_id;
2610         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2611
2612         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2613                   __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2614
2615         if (cm_node->tcp_cntxt.client)
2616                 return ret;
2617         cleanup_retrans_entry(cm_node);
2618
2619         if (!loopback) {
2620                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2621                 if (passive_state == NES_SEND_RESET_EVENT) {
2622                         cm_node->state = NES_CM_STATE_CLOSED;
2623                         rem_ref_cm_node(cm_core, cm_node);
2624                 } else {
2625                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2626                                 rem_ref_cm_node(cm_core, cm_node);
2627                         } else {
2628                                 ret = send_mpa_reject(cm_node);
2629                                 if (ret) {
2630                                         cm_node->state = NES_CM_STATE_CLOSED;
2631                                         err = send_reset(cm_node, NULL);
2632                                         if (err)
2633                                                 WARN_ON(1);
2634                                 } else {
2635                                         cm_id->add_ref(cm_id);
2636                                 }
2637                         }
2638                 }
2639         } else {
2640                 cm_node->cm_id = NULL;
2641                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2642                         rem_ref_cm_node(cm_core, cm_node);
2643                         rem_ref_cm_node(cm_core, loopback);
2644                 } else {
2645                         event.cm_node = loopback;
2646                         event.cm_info.rem_addr = loopback->rem_addr;
2647                         event.cm_info.loc_addr = loopback->loc_addr;
2648                         event.cm_info.rem_port = loopback->rem_port;
2649                         event.cm_info.loc_port = loopback->loc_port;
2650                         event.cm_info.cm_id = loopback->cm_id;
2651                         cm_event_mpa_reject(&event);
2652                         rem_ref_cm_node(cm_core, cm_node);
2653                         loopback->state = NES_CM_STATE_CLOSING;
2654
2655                         cm_id = loopback->cm_id;
2656                         rem_ref_cm_node(cm_core, loopback);
2657                         cm_id->rem_ref(cm_id);
2658                 }
2659         }
2660
2661         return ret;
2662 }
2663
2664
2665 /**
2666  * mini_cm_close
2667  */
2668 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2669 {
2670         int ret = 0;
2671
2672         if (!cm_core || !cm_node)
2673                 return -EINVAL;
2674
2675         switch (cm_node->state) {
2676         case NES_CM_STATE_SYN_RCVD:
2677         case NES_CM_STATE_SYN_SENT:
2678         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2679         case NES_CM_STATE_ESTABLISHED:
2680         case NES_CM_STATE_ACCEPTING:
2681         case NES_CM_STATE_MPAREQ_SENT:
2682         case NES_CM_STATE_MPAREQ_RCVD:
2683                 cleanup_retrans_entry(cm_node);
2684                 send_reset(cm_node, NULL);
2685                 break;
2686         case NES_CM_STATE_CLOSE_WAIT:
2687                 cm_node->state = NES_CM_STATE_LAST_ACK;
2688                 send_fin(cm_node, NULL);
2689                 break;
2690         case NES_CM_STATE_FIN_WAIT1:
2691         case NES_CM_STATE_FIN_WAIT2:
2692         case NES_CM_STATE_LAST_ACK:
2693         case NES_CM_STATE_TIME_WAIT:
2694         case NES_CM_STATE_CLOSING:
2695                 ret = -1;
2696                 break;
2697         case NES_CM_STATE_LISTENING:
2698                 cleanup_retrans_entry(cm_node);
2699                 send_reset(cm_node, NULL);
2700                 break;
2701         case NES_CM_STATE_MPAREJ_RCVD:
2702         case NES_CM_STATE_UNKNOWN:
2703         case NES_CM_STATE_INITED:
2704         case NES_CM_STATE_CLOSED:
2705         case NES_CM_STATE_LISTENER_DESTROYED:
2706                 ret = rem_ref_cm_node(cm_core, cm_node);
2707                 break;
2708         case NES_CM_STATE_TSA:
2709                 if (cm_node->send_entry)
2710                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2711                                "send_entry=%p\n", cm_node->send_entry);
2712                 ret = rem_ref_cm_node(cm_core, cm_node);
2713                 break;
2714         }
2715         return ret;
2716 }
2717
2718
2719 /**
2720  * recv_pkt - recv an ETHERNET packet, and process it through CM
2721  * node state machine
2722  */
2723 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2724                             struct nes_vnic *nesvnic, struct sk_buff *skb)
2725 {
2726         struct nes_cm_node *cm_node = NULL;
2727         struct nes_cm_listener *listener = NULL;
2728         struct iphdr *iph;
2729         struct tcphdr *tcph;
2730         struct nes_cm_info nfo;
2731         int skb_handled = 1;
2732         __be32 tmp_daddr, tmp_saddr;
2733
2734         if (!skb)
2735                 return 0;
2736         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2737                 return 0;
2738
2739         iph = (struct iphdr *)skb->data;
2740         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2741
2742         nfo.loc_addr = ntohl(iph->daddr);
2743         nfo.loc_port = ntohs(tcph->dest);
2744         nfo.rem_addr = ntohl(iph->saddr);
2745         nfo.rem_port = ntohs(tcph->source);
2746
2747         /* If port mapper is available these should be mapped address info */
2748         nfo.mapped_loc_addr = ntohl(iph->daddr);
2749         nfo.mapped_loc_port = ntohs(tcph->dest);
2750         nfo.mapped_rem_addr = ntohl(iph->saddr);
2751         nfo.mapped_rem_port = ntohs(tcph->source);
2752
2753         tmp_daddr = cpu_to_be32(iph->daddr);
2754         tmp_saddr = cpu_to_be32(iph->saddr);
2755
2756         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2757                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2758
2759         do {
2760                 cm_node = find_node(cm_core,
2761                                     nfo.mapped_rem_port, nfo.mapped_rem_addr,
2762                                     nfo.mapped_loc_port, nfo.mapped_loc_addr);
2763
2764                 if (!cm_node) {
2765                         /* Only type of packet accepted are for */
2766                         /* the PASSIVE open (syn only) */
2767                         if ((!tcph->syn) || (tcph->ack)) {
2768                                 skb_handled = 0;
2769                                 break;
2770                         }
2771                         listener = find_listener(cm_core, nfo.mapped_loc_addr,
2772                                         nfo.mapped_loc_port,
2773                                         NES_CM_LISTENER_ACTIVE_STATE, 0);
2774                         if (!listener) {
2775                                 nfo.cm_id = NULL;
2776                                 nfo.conn_type = 0;
2777                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2778                                 skb_handled = 0;
2779                                 break;
2780                         }
2781                         nfo.cm_id = listener->cm_id;
2782                         nfo.conn_type = listener->conn_type;
2783                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2784                                                listener);
2785                         if (!cm_node) {
2786                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2787                                           "node\n");
2788                                 cm_packets_dropped++;
2789                                 atomic_dec(&listener->ref_count);
2790                                 dev_kfree_skb_any(skb);
2791                                 break;
2792                         }
2793                         if (!tcph->rst && !tcph->fin) {
2794                                 cm_node->state = NES_CM_STATE_LISTENING;
2795                         } else {
2796                                 cm_packets_dropped++;
2797                                 rem_ref_cm_node(cm_core, cm_node);
2798                                 dev_kfree_skb_any(skb);
2799                                 break;
2800                         }
2801                         add_ref_cm_node(cm_node);
2802                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2803                         if (cm_node->nesqp->pau_mode)
2804                                 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2805                         else {
2806                                 rem_ref_cm_node(cm_core, cm_node);
2807                                 atomic_inc(&cm_accel_dropped_pkts);
2808                                 dev_kfree_skb_any(skb);
2809                         }
2810                         break;
2811                 }
2812                 skb_reset_network_header(skb);
2813                 skb_set_transport_header(skb, sizeof(*tcph));
2814                 skb->len = ntohs(iph->tot_len);
2815                 process_packet(cm_node, skb, cm_core);
2816                 rem_ref_cm_node(cm_core, cm_node);
2817         } while (0);
2818         return skb_handled;
2819 }
2820
2821
2822 /**
2823  * nes_cm_alloc_core - allocate a top level instance of a cm core
2824  */
2825 static struct nes_cm_core *nes_cm_alloc_core(void)
2826 {
2827         struct nes_cm_core *cm_core;
2828
2829         /* setup the CM core */
2830         /* alloc top level core control structure */
2831         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2832         if (!cm_core)
2833                 return NULL;
2834
2835         INIT_LIST_HEAD(&cm_core->connected_nodes);
2836         init_timer(&cm_core->tcp_timer);
2837         cm_core->tcp_timer.function = nes_cm_timer_tick;
2838
2839         cm_core->mtu = NES_CM_DEFAULT_MTU;
2840         cm_core->state = NES_CM_STATE_INITED;
2841         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2842
2843         atomic_set(&cm_core->events_posted, 0);
2844
2845         cm_core->api = &nes_cm_api;
2846
2847         spin_lock_init(&cm_core->ht_lock);
2848         spin_lock_init(&cm_core->listen_list_lock);
2849
2850         INIT_LIST_HEAD(&cm_core->listen_list.list);
2851
2852         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2853
2854         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2855         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2856         cm_core->post_event = nes_cm_post_event;
2857         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2858         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2859
2860         print_core(cm_core);
2861         return cm_core;
2862 }
2863
2864
2865 /**
2866  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2867  */
2868 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2869 {
2870         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2871
2872         if (!cm_core)
2873                 return -EINVAL;
2874
2875         barrier();
2876
2877         if (timer_pending(&cm_core->tcp_timer))
2878                 del_timer(&cm_core->tcp_timer);
2879
2880         destroy_workqueue(cm_core->event_wq);
2881         destroy_workqueue(cm_core->disconn_wq);
2882         nes_debug(NES_DBG_CM, "\n");
2883         kfree(cm_core);
2884
2885         return 0;
2886 }
2887
2888
2889 /**
2890  * mini_cm_get
2891  */
2892 static int mini_cm_get(struct nes_cm_core *cm_core)
2893 {
2894         return cm_core->state;
2895 }
2896
2897
2898 /**
2899  * mini_cm_set
2900  */
2901 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2902 {
2903         int ret = 0;
2904
2905         switch (type) {
2906         case NES_CM_SET_PKT_SIZE:
2907                 cm_core->mtu = value;
2908                 break;
2909         case NES_CM_SET_FREE_PKT_Q_SIZE:
2910                 cm_core->free_tx_pkt_max = value;
2911                 break;
2912         default:
2913                 /* unknown set option */
2914                 ret = -EINVAL;
2915         }
2916
2917         return ret;
2918 }
2919
2920
2921 /**
2922  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2923  * successfully exchanged when this is called
2924  */
2925 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2926 {
2927         int ret = 0;
2928
2929         if (!nesqp)
2930                 return -EINVAL;
2931
2932         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2933                                                   NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2934                                                   NES_QPCONTEXT_MISC_DROS);
2935
2936         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2937                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2938
2939         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2940
2941         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2942
2943         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2944                 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2945
2946         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2947                 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2948                 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2949
2950         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2951                 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2952                 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2953
2954         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2955         nesqp->nesqp_context->ts_recent = 0;
2956         nesqp->nesqp_context->ts_age = 0;
2957         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2958         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2959         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2960         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2961                                                     cm_node->tcp_cntxt.rcv_wscale);
2962         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2963         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2964         nesqp->nesqp_context->srtt = 0;
2965         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2966         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2967         nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2968         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2969         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2970         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2971
2972         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2973                   " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2974                   nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2975                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2976                   cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2977                   le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2978                   le32_to_cpu(nesqp->nesqp_context->misc));
2979         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2980         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2981         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2982
2983         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2984         cm_node->state = NES_CM_STATE_TSA;
2985
2986         return ret;
2987 }
2988
2989
2990 /**
2991  * nes_cm_disconn
2992  */
2993 int nes_cm_disconn(struct nes_qp *nesqp)
2994 {
2995         struct disconn_work *work;
2996
2997         work = kzalloc(sizeof *work, GFP_ATOMIC);
2998         if (!work)
2999                 return -ENOMEM;  /* Timer will clean up */
3000
3001         nes_add_ref(&nesqp->ibqp);
3002         work->nesqp = nesqp;
3003         INIT_WORK(&work->work, nes_disconnect_worker);
3004         queue_work(g_cm_core->disconn_wq, &work->work);
3005         return 0;
3006 }
3007
3008
3009 /**
3010  * nes_disconnect_worker
3011  */
3012 static void nes_disconnect_worker(struct work_struct *work)
3013 {
3014         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
3015         struct nes_qp *nesqp = dwork->nesqp;
3016
3017         kfree(dwork);
3018         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
3019                   nesqp->last_aeq, nesqp->hwqp.qp_id);
3020         nes_cm_disconn_true(nesqp);
3021         nes_rem_ref(&nesqp->ibqp);
3022 }
3023
3024
3025 /**
3026  * nes_cm_disconn_true
3027  */
3028 static int nes_cm_disconn_true(struct nes_qp *nesqp)
3029 {
3030         unsigned long flags;
3031         int ret = 0;
3032         struct iw_cm_id *cm_id;
3033         struct iw_cm_event cm_event;
3034         struct nes_vnic *nesvnic;
3035         u16 last_ae;
3036         u8 original_hw_tcp_state;
3037         u8 original_ibqp_state;
3038         int disconn_status = 0;
3039         int issue_disconn = 0;
3040         int issue_close = 0;
3041         int issue_flush = 0;
3042         u32 flush_q = NES_CQP_FLUSH_RQ;
3043         struct ib_event ibevent;
3044
3045         if (!nesqp) {
3046                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
3047                 return -1;
3048         }
3049
3050         spin_lock_irqsave(&nesqp->lock, flags);
3051         cm_id = nesqp->cm_id;
3052         /* make sure we havent already closed this connection */
3053         if (!cm_id) {
3054                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
3055                           nesqp->hwqp.qp_id);
3056                 spin_unlock_irqrestore(&nesqp->lock, flags);
3057                 return -1;
3058         }
3059
3060         nesvnic = to_nesvnic(nesqp->ibqp.device);
3061         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
3062
3063         original_hw_tcp_state = nesqp->hw_tcp_state;
3064         original_ibqp_state = nesqp->ibqp_state;
3065         last_ae = nesqp->last_aeq;
3066
3067         if (nesqp->term_flags) {
3068                 issue_disconn = 1;
3069                 issue_close = 1;
3070                 nesqp->cm_id = NULL;
3071                 del_timer(&nesqp->terminate_timer);
3072                 if (nesqp->flush_issued == 0) {
3073                         nesqp->flush_issued = 1;
3074                         issue_flush = 1;
3075                 }
3076         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
3077                         ((original_ibqp_state == IB_QPS_RTS) &&
3078                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3079                 issue_disconn = 1;
3080                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
3081                         disconn_status = -ECONNRESET;
3082         }
3083
3084         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
3085                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
3086                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
3087                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
3088                 issue_close = 1;
3089                 nesqp->cm_id = NULL;
3090                 if (nesqp->flush_issued == 0) {
3091                         nesqp->flush_issued = 1;
3092                         issue_flush = 1;
3093                 }
3094         }
3095
3096         spin_unlock_irqrestore(&nesqp->lock, flags);
3097
3098         if ((issue_flush) && (nesqp->destroyed == 0)) {
3099                 /* Flush the queue(s) */
3100                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
3101                         flush_q |= NES_CQP_FLUSH_SQ;
3102                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
3103
3104                 if (nesqp->term_flags) {
3105                         ibevent.device = nesqp->ibqp.device;
3106                         ibevent.event = nesqp->terminate_eventtype;
3107                         ibevent.element.qp = &nesqp->ibqp;
3108                         if (nesqp->ibqp.event_handler)
3109                                 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
3110                 }
3111         }
3112
3113         if ((cm_id) && (cm_id->event_handler)) {
3114                 if (issue_disconn) {
3115                         atomic_inc(&cm_disconnects);
3116                         cm_event.event = IW_CM_EVENT_DISCONNECT;
3117                         cm_event.status = disconn_status;
3118                         cm_event.local_addr = cm_id->local_addr;
3119                         cm_event.remote_addr = cm_id->remote_addr;
3120                         cm_event.private_data = NULL;
3121                         cm_event.private_data_len = 0;
3122
3123                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
3124                                   " for  QP%u, SQ Head = %u, SQ Tail = %u. "
3125                                   "cm_id = %p, refcount = %u.\n",
3126                                   nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
3127                                   nesqp->hwqp.sq_tail, cm_id,
3128                                   atomic_read(&nesqp->refcount));
3129
3130                         ret = cm_id->event_handler(cm_id, &cm_event);
3131                         if (ret)
3132                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
3133                                           "returned, ret=%d\n", ret);
3134                 }
3135
3136                 if (issue_close) {
3137                         atomic_inc(&cm_closes);
3138                         nes_disconnect(nesqp, 1);
3139
3140                         cm_id->provider_data = nesqp;
3141                         /* Send up the close complete event */
3142                         cm_event.event = IW_CM_EVENT_CLOSE;
3143                         cm_event.status = 0;
3144                         cm_event.provider_data = cm_id->provider_data;
3145                         cm_event.local_addr = cm_id->local_addr;
3146                         cm_event.remote_addr = cm_id->remote_addr;
3147                         cm_event.private_data = NULL;
3148                         cm_event.private_data_len = 0;
3149
3150                         ret = cm_id->event_handler(cm_id, &cm_event);
3151                         if (ret)
3152                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3153
3154                         cm_id->rem_ref(cm_id);
3155                 }
3156         }
3157
3158         return 0;
3159 }
3160
3161
3162 /**
3163  * nes_disconnect
3164  */
3165 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
3166 {
3167         int ret = 0;
3168         struct nes_vnic *nesvnic;
3169         struct nes_device *nesdev;
3170         struct nes_ib_device *nesibdev;
3171
3172         nesvnic = to_nesvnic(nesqp->ibqp.device);
3173         if (!nesvnic)
3174                 return -EINVAL;
3175
3176         nesdev = nesvnic->nesdev;
3177         nesibdev = nesvnic->nesibdev;
3178
3179         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3180                         netdev_refcnt_read(nesvnic->netdev));
3181
3182         if (nesqp->active_conn) {
3183
3184                 /* indicate this connection is NOT active */
3185                 nesqp->active_conn = 0;
3186         } else {
3187                 /* Need to free the Last Streaming Mode Message */
3188                 if (nesqp->ietf_frame) {
3189                         if (nesqp->lsmm_mr)
3190                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
3191                         pci_free_consistent(nesdev->pcidev,
3192                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3193                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3194                 }
3195         }
3196
3197         /* close the CM node down if it is still active */
3198         if (nesqp->cm_node) {
3199                 nes_debug(NES_DBG_CM, "Call close API\n");
3200
3201                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
3202         }
3203
3204         return ret;
3205 }
3206
3207
3208 /**
3209  * nes_accept
3210  */
3211 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3212 {
3213         u64 u64temp;
3214         struct ib_qp *ibqp;
3215         struct nes_qp *nesqp;
3216         struct nes_vnic *nesvnic;
3217         struct nes_device *nesdev;
3218         struct nes_cm_node *cm_node;
3219         struct nes_adapter *adapter;
3220         struct ib_qp_attr attr;
3221         struct iw_cm_event cm_event;
3222         struct nes_hw_qp_wqe *wqe;
3223         struct nes_v4_quad nes_quad;
3224         u32 crc_value;
3225         int ret;
3226         int passive_state;
3227         struct nes_ib_device *nesibdev;
3228         struct ib_mr *ibmr = NULL;
3229         struct ib_phys_buf ibphysbuf;
3230         struct nes_pd *nespd;
3231         u64 tagged_offset;
3232         u8 mpa_frame_offset = 0;
3233         struct ietf_mpa_v2 *mpa_v2_frame;
3234         u8 start_addr = 0;
3235         u8 *start_ptr = &start_addr;
3236         u8 **start_buff = &start_ptr;
3237         u16 buff_len = 0;
3238         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3239         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3240
3241         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3242         if (!ibqp)
3243                 return -EINVAL;
3244
3245         /* get all our handles */
3246         nesqp = to_nesqp(ibqp);
3247         nesvnic = to_nesvnic(nesqp->ibqp.device);
3248         nesdev = nesvnic->nesdev;
3249         adapter = nesdev->nesadapter;
3250
3251         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3252         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3253                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3254                 nesvnic->netdev->name);
3255
3256         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3257                 if (cm_node->loopbackpartner)
3258                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3259                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3260                 return -EINVAL;
3261         }
3262
3263         passive_state = atomic_add_return(1, &cm_node->passive_state);
3264         if (passive_state == NES_SEND_RESET_EVENT) {
3265                 rem_ref_cm_node(cm_node->cm_core, cm_node);
3266                 return -ECONNRESET;
3267         }
3268         /* associate the node with the QP */
3269         nesqp->cm_node = (void *)cm_node;
3270         cm_node->nesqp = nesqp;
3271
3272
3273         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3274                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3275         atomic_inc(&cm_accepts);
3276
3277         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3278                         netdev_refcnt_read(nesvnic->netdev));
3279
3280         nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3281         /* allocate the ietf frame and space for private data */
3282         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3283                                                  nesqp->ietf_frame_size + conn_param->private_data_len,
3284                                                  &nesqp->ietf_frame_pbase);
3285
3286         if (!nesqp->ietf_frame) {
3287                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3288                 return -ENOMEM;
3289         }
3290         mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3291
3292         if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3293                 mpa_frame_offset = 4;
3294
3295         if (cm_node->mpa_frame_rev == IETF_MPA_V1 ||
3296                         cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) {
3297                 record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3298         }
3299
3300         memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3301                conn_param->private_data_len);
3302
3303         cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3304         nesqp->private_data_len = conn_param->private_data_len;
3305
3306         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3307         wqe = &nesqp->hwqp.sq_vbase[0];
3308
3309         if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3310                 u64temp = (unsigned long)nesqp;
3311                 nesibdev = nesvnic->nesibdev;
3312                 nespd = nesqp->nespd;
3313                 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3314                 ibphysbuf.size = buff_len;
3315                 tagged_offset = (u64)(unsigned long)*start_buff;
3316                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3317                                                    &ibphysbuf, 1,
3318                                                    IB_ACCESS_LOCAL_WRITE,
3319                                                    &tagged_offset);
3320                 if (!ibmr) {
3321                         nes_debug(NES_DBG_CM, "Unable to register memory region"
3322                                   "for lSMM for cm_node = %p \n",
3323                                   cm_node);
3324                         pci_free_consistent(nesdev->pcidev,
3325                                             nesqp->private_data_len + nesqp->ietf_frame_size,
3326                                             nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3327                         return -ENOMEM;
3328                 }
3329
3330                 ibmr->pd = &nespd->ibpd;
3331                 ibmr->device = nespd->ibpd.device;
3332                 nesqp->lsmm_mr = ibmr;
3333
3334                 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3335                 set_wqe_64bit_value(wqe->wqe_words,
3336                                     NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3337                                     u64temp);
3338                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3339                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3340                                     NES_IWARP_SQ_WQE_WRPDU);
3341                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3342                         cpu_to_le32(buff_len);
3343                 set_wqe_64bit_value(wqe->wqe_words,
3344                                     NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3345                                     (u64)(unsigned long)(*start_buff));
3346                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3347                         cpu_to_le32(buff_len);
3348                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3349                 if (nesqp->sq_kmapped) {
3350                         nesqp->sq_kmapped = 0;
3351                         kunmap(nesqp->page);
3352                 }
3353
3354                 nesqp->nesqp_context->ird_ord_sizes |=
3355                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3356                                     NES_QPCONTEXT_ORDIRD_WRPDU);
3357         } else {
3358                 nesqp->nesqp_context->ird_ord_sizes |=
3359                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3360         }
3361         nesqp->skip_lsmm = 1;
3362
3363         /* Cache the cm_id in the qp */
3364         nesqp->cm_id = cm_id;
3365         cm_node->cm_id = cm_id;
3366
3367         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
3368         cm_id->provider_data = nesqp;
3369         nesqp->active_conn = 0;
3370
3371         if (cm_node->state == NES_CM_STATE_TSA)
3372                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3373                           cm_node);
3374
3375         nes_cm_init_tsa_conn(nesqp, cm_node);
3376
3377         nesqp->nesqp_context->tcpPorts[0] =
3378                                 cpu_to_le16(cm_node->mapped_loc_port);
3379         nesqp->nesqp_context->tcpPorts[1] =
3380                                 cpu_to_le16(cm_node->mapped_rem_port);
3381
3382         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3383
3384         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3385                 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3386                 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3387
3388         nesqp->nesqp_context->arp_index_vlan |=
3389                 cpu_to_le32(nes_arp_table(nesdev,
3390                                           le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3391                                           NES_ARP_RESOLVE) << 16);
3392
3393         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3394                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3395
3396         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3397
3398         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3399                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3400         nesqp->nesqp_context->ird_ord_sizes |=
3401                 cpu_to_le32((u32)cm_node->ord_size);
3402
3403         memset(&nes_quad, 0, sizeof(nes_quad));
3404         nes_quad.DstIpAdrIndex =
3405                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3406         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3407         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3408         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3409
3410         /* Produce hash key */
3411         crc_value = get_crc_value(&nes_quad);
3412         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3413         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3414                   nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3415
3416         nesqp->hte_index &= adapter->hte_index_mask;
3417         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3418
3419         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3420
3421         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3422                   "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3423                   "private data length=%u.\n", nesqp->hwqp.qp_id,
3424                   ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3425                   ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3426                   le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3427                   le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3428                   buff_len);
3429
3430         /* notify OF layer that accept event was successful */
3431         cm_id->add_ref(cm_id);
3432         nes_add_ref(&nesqp->ibqp);
3433
3434         cm_event.event = IW_CM_EVENT_ESTABLISHED;
3435         cm_event.status = 0;
3436         cm_event.provider_data = (void *)nesqp;
3437         cm_event.local_addr = cm_id->local_addr;
3438         cm_event.remote_addr = cm_id->remote_addr;
3439         cm_event.private_data = NULL;
3440         cm_event.private_data_len = 0;
3441         cm_event.ird = cm_node->ird_size;
3442         cm_event.ord = cm_node->ord_size;
3443
3444         ret = cm_id->event_handler(cm_id, &cm_event);
3445         attr.qp_state = IB_QPS_RTS;
3446         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3447         if (cm_node->loopbackpartner) {
3448                 cm_node->loopbackpartner->mpa_frame_size =
3449                         nesqp->private_data_len;
3450                 /* copy entire MPA frame to our cm_node's frame */
3451                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3452                        conn_param->private_data, conn_param->private_data_len);
3453                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3454         }
3455         if (ret)
3456                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3457                        "ret=%d\n", __func__, __LINE__, ret);
3458
3459         return 0;
3460 }
3461
3462
3463 /**
3464  * nes_reject
3465  */
3466 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3467 {
3468         struct nes_cm_node *cm_node;
3469         struct nes_cm_node *loopback;
3470         struct nes_cm_core *cm_core;
3471         u8 *start_buff;
3472
3473         atomic_inc(&cm_rejects);
3474         cm_node = (struct nes_cm_node *)cm_id->provider_data;
3475         loopback = cm_node->loopbackpartner;
3476         cm_core = cm_node->cm_core;
3477         cm_node->cm_id = cm_id;
3478
3479         if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3480                 return -EINVAL;
3481
3482         if (loopback) {
3483                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3484                 loopback->mpa_frame.priv_data_len = pdata_len;
3485                 loopback->mpa_frame_size = pdata_len;
3486         } else {
3487                 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3488                 cm_node->mpa_frame_size = pdata_len;
3489                 memcpy(start_buff, pdata, pdata_len);
3490         }
3491         return cm_core->api->reject(cm_core, cm_node);
3492 }
3493
3494
3495 /**
3496  * nes_connect
3497  * setup and launch cm connect node
3498  */
3499 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3500 {
3501         struct ib_qp *ibqp;
3502         struct nes_qp *nesqp;
3503         struct nes_vnic *nesvnic;
3504         struct nes_device *nesdev;
3505         struct nes_cm_node *cm_node;
3506         struct nes_cm_info cm_info;
3507         int apbvt_set = 0;
3508         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3509         struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3510         struct iwpm_dev_data pm_reg_msg;
3511         struct iwpm_sa_data pm_msg;
3512         int iwpm_err = 0;
3513
3514         if (cm_id->remote_addr.ss_family != AF_INET)
3515                 return -ENOSYS;
3516         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3517         if (!ibqp)
3518                 return -EINVAL;
3519         nesqp = to_nesqp(ibqp);
3520         if (!nesqp)
3521                 return -EINVAL;
3522         nesvnic = to_nesvnic(nesqp->ibqp.device);
3523         if (!nesvnic)
3524                 return -EINVAL;
3525         nesdev = nesvnic->nesdev;
3526         if (!nesdev)
3527                 return -EINVAL;
3528
3529         if (!laddr->sin_port || !raddr->sin_port)
3530                 return -EINVAL;
3531
3532         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3533                   "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3534                   ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3535                   ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3536                   ntohs(laddr->sin_port));
3537
3538         atomic_inc(&cm_connects);
3539         nesqp->active_conn = 1;
3540
3541         /* cache the cm_id in the qp */
3542         nesqp->cm_id = cm_id;
3543         cm_id->provider_data = nesqp;
3544         nesqp->private_data_len = conn_param->private_data_len;
3545
3546         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3547         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3548                   conn_param->private_data_len);
3549
3550         /* set up the connection params for the node */
3551         cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr);
3552         cm_info.loc_port = ntohs(laddr->sin_port);
3553         cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr);
3554         cm_info.rem_port = ntohs(raddr->sin_port);
3555         cm_info.cm_id = cm_id;
3556         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3557
3558         /* No port mapper available, go with the specified peer information */
3559         cm_info.mapped_loc_addr = cm_info.loc_addr;
3560         cm_info.mapped_loc_port = cm_info.loc_port;
3561         cm_info.mapped_rem_addr = cm_info.rem_addr;
3562         cm_info.mapped_rem_port = cm_info.rem_port;
3563
3564         nes_form_reg_msg(nesvnic, &pm_reg_msg);
3565         iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_NES);
3566         if (iwpm_err) {
3567                 nes_debug(NES_DBG_NLMSG,
3568                         "Port Mapper reg pid fail (err = %d).\n", iwpm_err);
3569         }
3570         if (iwpm_valid_pid() && !iwpm_err) {
3571                 nes_form_pm_msg(&cm_info, &pm_msg);
3572                 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_NES);
3573                 if (iwpm_err)
3574                         nes_debug(NES_DBG_NLMSG,
3575                         "Port Mapper query fail (err = %d).\n", iwpm_err);
3576                 else
3577                         nes_record_pm_msg(&cm_info, &pm_msg);
3578         }
3579
3580         if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3581                 nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3582                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3583                 apbvt_set = 1;
3584         }
3585
3586         if (nes_create_mapinfo(&cm_info))
3587                 return -ENOMEM;
3588
3589         cm_id->add_ref(cm_id);
3590
3591         /* create a connect CM node connection */
3592         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3593                                           conn_param->private_data_len, (void *)conn_param->private_data,
3594                                           &cm_info);
3595         if (!cm_node) {
3596                 if (apbvt_set)
3597                         nes_manage_apbvt(nesvnic, cm_info.mapped_loc_port,
3598                                          PCI_FUNC(nesdev->pcidev->devfn),
3599                                          NES_MANAGE_APBVT_DEL);
3600
3601                 nes_debug(NES_DBG_NLMSG, "Delete mapped_loc_port = %04X\n",
3602                                 cm_info.mapped_loc_port);
3603                 nes_remove_mapinfo(cm_info.loc_addr, cm_info.loc_port,
3604                         cm_info.mapped_loc_addr, cm_info.mapped_loc_port);
3605                 cm_id->rem_ref(cm_id);
3606                 return -ENOMEM;
3607         }
3608
3609         record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord);
3610         if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO &&
3611                                 cm_node->ord_size == 0)
3612                 cm_node->ord_size = 1;
3613
3614         cm_node->apbvt_set = apbvt_set;
3615         nesqp->cm_node = cm_node;
3616         cm_node->nesqp = nesqp;
3617         nes_add_ref(&nesqp->ibqp);
3618
3619         return 0;
3620 }
3621
3622
3623 /**
3624  * nes_create_listen
3625  */
3626 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3627 {
3628         struct nes_vnic *nesvnic;
3629         struct nes_cm_listener *cm_node;
3630         struct nes_cm_info cm_info;
3631         int err;
3632         struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3633
3634         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3635                   cm_id, ntohs(laddr->sin_port));
3636
3637         if (cm_id->local_addr.ss_family != AF_INET)
3638                 return -ENOSYS;
3639         nesvnic = to_nesvnic(cm_id->device);
3640         if (!nesvnic)
3641                 return -EINVAL;
3642
3643         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3644                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3645
3646         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3647                         nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3648
3649         /* setup listen params in our api call struct */
3650         cm_info.loc_addr = ntohl(nesvnic->local_ipaddr);
3651         cm_info.loc_port = ntohs(laddr->sin_port);
3652         cm_info.backlog = backlog;
3653         cm_info.cm_id = cm_id;
3654
3655         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3656
3657         /* No port mapper available, go with the specified info */
3658         cm_info.mapped_loc_addr = cm_info.loc_addr;
3659         cm_info.mapped_loc_port = cm_info.loc_port;
3660
3661         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3662         if (!cm_node) {
3663                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3664                        __func__, __LINE__);
3665                 return -ENOMEM;
3666         }
3667
3668         cm_id->provider_data = cm_node;
3669
3670         if (!cm_node->reused_node) {
3671                 if (nes_create_mapinfo(&cm_info))
3672                         return -ENOMEM;
3673
3674                 err = nes_manage_apbvt(nesvnic, cm_node->mapped_loc_port,
3675                                        PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3676                                        NES_MANAGE_APBVT_ADD);
3677                 if (err) {
3678                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3679                                err);
3680                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3681                         return err;
3682                 }
3683                 atomic_inc(&cm_listens_created);
3684         }
3685
3686         cm_id->add_ref(cm_id);
3687         cm_id->provider_data = (void *)cm_node;
3688
3689
3690         return 0;
3691 }
3692
3693
3694 /**
3695  * nes_destroy_listen
3696  */
3697 int nes_destroy_listen(struct iw_cm_id *cm_id)
3698 {
3699         if (cm_id->provider_data)
3700                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3701         else
3702                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3703
3704         cm_id->rem_ref(cm_id);
3705
3706         return 0;
3707 }
3708
3709
3710 /**
3711  * nes_cm_recv
3712  */
3713 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3714 {
3715         int rc = 0;
3716
3717         cm_packets_received++;
3718         if ((g_cm_core) && (g_cm_core->api))
3719                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3720         else
3721                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3722                           " cm is not setup properly.\n");
3723
3724         return rc;
3725 }
3726
3727
3728 /**
3729  * nes_cm_start
3730  * Start and init a cm core module
3731  */
3732 int nes_cm_start(void)
3733 {
3734         nes_debug(NES_DBG_CM, "\n");
3735         /* create the primary CM core, pass this handle to subsequent core inits */
3736         g_cm_core = nes_cm_alloc_core();
3737         if (g_cm_core)
3738                 return 0;
3739         else
3740                 return -ENOMEM;
3741 }
3742
3743
3744 /**
3745  * nes_cm_stop
3746  * stop and dealloc all cm core instances
3747  */
3748 int nes_cm_stop(void)
3749 {
3750         g_cm_core->api->destroy_cm_core(g_cm_core);
3751         return 0;
3752 }
3753
3754
3755 /**
3756  * cm_event_connected
3757  * handle a connected event, setup QPs and HW
3758  */
3759 static void cm_event_connected(struct nes_cm_event *event)
3760 {
3761         struct nes_qp *nesqp;
3762         struct nes_vnic *nesvnic;
3763         struct nes_device *nesdev;
3764         struct nes_cm_node *cm_node;
3765         struct nes_adapter *nesadapter;
3766         struct ib_qp_attr attr;
3767         struct iw_cm_id *cm_id;
3768         struct iw_cm_event cm_event;
3769         struct nes_v4_quad nes_quad;
3770         u32 crc_value;
3771         int ret;
3772         struct sockaddr_in *laddr;
3773         struct sockaddr_in *raddr;
3774         struct sockaddr_in *cm_event_laddr;
3775
3776         /* get all our handles */
3777         cm_node = event->cm_node;
3778         cm_id = cm_node->cm_id;
3779         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3780         nesqp = (struct nes_qp *)cm_id->provider_data;
3781         nesvnic = to_nesvnic(nesqp->ibqp.device);
3782         nesdev = nesvnic->nesdev;
3783         nesadapter = nesdev->nesadapter;
3784         laddr = (struct sockaddr_in *)&cm_id->local_addr;
3785         raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3786         cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3787
3788         if (nesqp->destroyed)
3789                 return;
3790         atomic_inc(&cm_connecteds);
3791         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3792                   " local port 0x%04X. jiffies = %lu.\n",
3793                   nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3794                   ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3795
3796         nes_cm_init_tsa_conn(nesqp, cm_node);
3797
3798         /* set the QP tsa context */
3799         nesqp->nesqp_context->tcpPorts[0] =
3800                         cpu_to_le16(cm_node->mapped_loc_port);
3801         nesqp->nesqp_context->tcpPorts[1] =
3802                         cpu_to_le16(cm_node->mapped_rem_port);
3803         nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->mapped_rem_addr);
3804
3805         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3806                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3807                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3808         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3809                         nes_arp_table(nesdev,
3810                         le32_to_cpu(nesqp->nesqp_context->ip0),
3811                         NULL, NES_ARP_RESOLVE) << 16);
3812         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3813                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3814         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3815         nesqp->nesqp_context->ird_ord_sizes |=
3816                         cpu_to_le32((u32)1 <<
3817                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3818         nesqp->nesqp_context->ird_ord_sizes |=
3819                         cpu_to_le32((u32)cm_node->ord_size);
3820
3821         /* Adjust tail for not having a LSMM */
3822         /*nesqp->hwqp.sq_tail = 1;*/
3823
3824         build_rdma0_msg(cm_node, &nesqp);
3825
3826         nes_write32(nesdev->regs + NES_WQE_ALLOC,
3827                     (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3828
3829         memset(&nes_quad, 0, sizeof(nes_quad));
3830
3831         nes_quad.DstIpAdrIndex =
3832                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3833         nes_quad.SrcIpadr = htonl(cm_node->mapped_rem_addr);
3834         nes_quad.TcpPorts[0] = htons(cm_node->mapped_rem_port);
3835         nes_quad.TcpPorts[1] = htons(cm_node->mapped_loc_port);
3836
3837         /* Produce hash key */
3838         crc_value = get_crc_value(&nes_quad);
3839         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3840         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3841                   nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3842
3843         nesqp->hte_index &= nesadapter->hte_index_mask;
3844         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3845
3846         nesqp->ietf_frame = &cm_node->mpa_frame;
3847         nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3848         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3849
3850         /* notify OF layer we successfully created the requested connection */
3851         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3852         cm_event.status = 0;
3853         cm_event.provider_data = cm_id->provider_data;
3854         cm_event_laddr->sin_family = AF_INET;
3855         cm_event_laddr->sin_port = laddr->sin_port;
3856         cm_event.remote_addr = cm_id->remote_addr;
3857
3858         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3859         cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3860         cm_event.ird = cm_node->ird_size;
3861         cm_event.ord = cm_node->ord_size;
3862
3863         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3864         ret = cm_id->event_handler(cm_id, &cm_event);
3865         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3866
3867         if (ret)
3868                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3869                        "ret=%d\n", __func__, __LINE__, ret);
3870         attr.qp_state = IB_QPS_RTS;
3871         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3872
3873         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3874                   "%lu\n", nesqp->hwqp.qp_id, jiffies);
3875
3876         return;
3877 }
3878
3879
3880 /**
3881  * cm_event_connect_error
3882  */
3883 static void cm_event_connect_error(struct nes_cm_event *event)
3884 {
3885         struct nes_qp *nesqp;
3886         struct iw_cm_id *cm_id;
3887         struct iw_cm_event cm_event;
3888         /* struct nes_cm_info cm_info; */
3889         int ret;
3890
3891         if (!event->cm_node)
3892                 return;
3893
3894         cm_id = event->cm_node->cm_id;
3895         if (!cm_id)
3896                 return;
3897
3898         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3899         nesqp = cm_id->provider_data;
3900
3901         if (!nesqp)
3902                 return;
3903
3904         /* notify OF layer about this connection error event */
3905         /* cm_id->rem_ref(cm_id); */
3906         nesqp->cm_id = NULL;
3907         cm_id->provider_data = NULL;
3908         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3909         cm_event.status = -ECONNRESET;
3910         cm_event.provider_data = cm_id->provider_data;
3911         cm_event.local_addr = cm_id->local_addr;
3912         cm_event.remote_addr = cm_id->remote_addr;
3913         cm_event.private_data = NULL;
3914         cm_event.private_data_len = 0;
3915
3916 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3917         {
3918                 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3919                                                      &cm_event.local_addr;
3920                 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3921                                                      &cm_event.remote_addr;
3922                 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3923                           cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3924         }
3925 #endif
3926
3927         ret = cm_id->event_handler(cm_id, &cm_event);
3928         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3929         if (ret)
3930                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3931                        "ret=%d\n", __func__, __LINE__, ret);
3932         cm_id->rem_ref(cm_id);
3933
3934         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3935         return;
3936 }
3937
3938
3939 /**
3940  * cm_event_reset
3941  */
3942 static void cm_event_reset(struct nes_cm_event *event)
3943 {
3944         struct nes_qp *nesqp;
3945         struct iw_cm_id *cm_id;
3946         struct iw_cm_event cm_event;
3947         /* struct nes_cm_info cm_info; */
3948         int ret;
3949
3950         if (!event->cm_node)
3951                 return;
3952
3953         if (!event->cm_node->cm_id)
3954                 return;
3955
3956         cm_id = event->cm_node->cm_id;
3957
3958         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3959         nesqp = cm_id->provider_data;
3960         if (!nesqp)
3961                 return;
3962
3963         nesqp->cm_id = NULL;
3964         /* cm_id->provider_data = NULL; */
3965         cm_event.event = IW_CM_EVENT_DISCONNECT;
3966         cm_event.status = -ECONNRESET;
3967         cm_event.provider_data = cm_id->provider_data;
3968         cm_event.local_addr = cm_id->local_addr;
3969         cm_event.remote_addr = cm_id->remote_addr;
3970         cm_event.private_data = NULL;
3971         cm_event.private_data_len = 0;
3972
3973         cm_id->add_ref(cm_id);
3974         ret = cm_id->event_handler(cm_id, &cm_event);
3975         atomic_inc(&cm_closes);
3976         cm_event.event = IW_CM_EVENT_CLOSE;
3977         cm_event.status = 0;
3978         cm_event.provider_data = cm_id->provider_data;
3979         cm_event.local_addr = cm_id->local_addr;
3980         cm_event.remote_addr = cm_id->remote_addr;
3981         cm_event.private_data = NULL;
3982         cm_event.private_data_len = 0;
3983         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3984         ret = cm_id->event_handler(cm_id, &cm_event);
3985
3986         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3987
3988
3989         /* notify OF layer about this connection error event */
3990         cm_id->rem_ref(cm_id);
3991
3992         return;
3993 }
3994
3995
3996 /**
3997  * cm_event_mpa_req
3998  */
3999 static void cm_event_mpa_req(struct nes_cm_event *event)
4000 {
4001         struct iw_cm_id *cm_id;
4002         struct iw_cm_event cm_event;
4003         int ret;
4004         struct nes_cm_node *cm_node;
4005         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4006                                              &cm_event.local_addr;
4007         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4008                                              &cm_event.remote_addr;
4009
4010         cm_node = event->cm_node;
4011         if (!cm_node)
4012                 return;
4013         cm_id = cm_node->cm_id;
4014
4015         atomic_inc(&cm_connect_reqs);
4016         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4017                   cm_node, cm_id, jiffies);
4018
4019         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
4020         cm_event.status = 0;
4021         cm_event.provider_data = (void *)cm_node;
4022
4023         cm_event_laddr->sin_family = AF_INET;
4024         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4025         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4026
4027         cm_event_raddr->sin_family = AF_INET;
4028         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4029         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4030         cm_event.private_data = cm_node->mpa_frame_buf;
4031         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4032         if (cm_node->mpa_frame_rev == IETF_MPA_V1) {
4033                 cm_event.ird = NES_MAX_IRD;
4034                 cm_event.ord = NES_MAX_ORD;
4035         } else {
4036         cm_event.ird = cm_node->ird_size;
4037         cm_event.ord = cm_node->ord_size;
4038         }
4039
4040         ret = cm_id->event_handler(cm_id, &cm_event);
4041         if (ret)
4042                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4043                        __func__, __LINE__, ret);
4044         return;
4045 }
4046
4047
4048 static void cm_event_mpa_reject(struct nes_cm_event *event)
4049 {
4050         struct iw_cm_id *cm_id;
4051         struct iw_cm_event cm_event;
4052         struct nes_cm_node *cm_node;
4053         int ret;
4054         struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
4055                                              &cm_event.local_addr;
4056         struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
4057                                              &cm_event.remote_addr;
4058
4059         cm_node = event->cm_node;
4060         if (!cm_node)
4061                 return;
4062         cm_id = cm_node->cm_id;
4063
4064         atomic_inc(&cm_connect_reqs);
4065         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
4066                   cm_node, cm_id, jiffies);
4067
4068         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
4069         cm_event.status = -ECONNREFUSED;
4070         cm_event.provider_data = cm_id->provider_data;
4071
4072         cm_event_laddr->sin_family = AF_INET;
4073         cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
4074         cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
4075
4076         cm_event_raddr->sin_family = AF_INET;
4077         cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
4078         cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
4079
4080         cm_event.private_data = cm_node->mpa_frame_buf;
4081         cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
4082
4083         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
4084                   "remove_addr=%08x\n",
4085                   cm_event_laddr->sin_addr.s_addr,
4086                   cm_event_raddr->sin_addr.s_addr);
4087
4088         ret = cm_id->event_handler(cm_id, &cm_event);
4089         if (ret)
4090                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
4091                        __func__, __LINE__, ret);
4092
4093         return;
4094 }
4095
4096
4097 static void nes_cm_event_handler(struct work_struct *);
4098
4099 /**
4100  * nes_cm_post_event
4101  * post an event to the cm event handler
4102  */
4103 static int nes_cm_post_event(struct nes_cm_event *event)
4104 {
4105         atomic_inc(&event->cm_node->cm_core->events_posted);
4106         add_ref_cm_node(event->cm_node);
4107         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
4108         INIT_WORK(&event->event_work, nes_cm_event_handler);
4109         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
4110                   event->cm_node, event);
4111
4112         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
4113
4114         nes_debug(NES_DBG_CM, "Exit\n");
4115         return 0;
4116 }
4117
4118
4119 /**
4120  * nes_cm_event_handler
4121  * worker function to handle cm events
4122  * will free instance of nes_cm_event
4123  */
4124 static void nes_cm_event_handler(struct work_struct *work)
4125 {
4126         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
4127                                                   event_work);
4128         struct nes_cm_core *cm_core;
4129
4130         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
4131                 return;
4132
4133         cm_core = event->cm_node->cm_core;
4134         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
4135                   event, event->type, atomic_read(&cm_core->events_posted));
4136
4137         switch (event->type) {
4138         case NES_CM_EVENT_MPA_REQ:
4139                 cm_event_mpa_req(event);
4140                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
4141                           event->cm_node);
4142                 break;
4143         case NES_CM_EVENT_RESET:
4144                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
4145                           event->cm_node);
4146                 cm_event_reset(event);
4147                 break;
4148         case NES_CM_EVENT_CONNECTED:
4149                 if ((!event->cm_node->cm_id) ||
4150                     (event->cm_node->state != NES_CM_STATE_TSA))
4151                         break;
4152                 cm_event_connected(event);
4153                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
4154                 break;
4155         case NES_CM_EVENT_MPA_REJECT:
4156                 if ((!event->cm_node->cm_id) ||
4157                     (event->cm_node->state == NES_CM_STATE_TSA))
4158                         break;
4159                 cm_event_mpa_reject(event);
4160                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
4161                 break;
4162
4163         case NES_CM_EVENT_ABORTED:
4164                 if ((!event->cm_node->cm_id) ||
4165                     (event->cm_node->state == NES_CM_STATE_TSA))
4166                         break;
4167                 cm_event_connect_error(event);
4168                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
4169                 break;
4170         case NES_CM_EVENT_DROPPED_PKT:
4171                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
4172                 break;
4173         default:
4174                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
4175                 break;
4176         }
4177
4178         atomic_dec(&cm_core->events_posted);
4179         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
4180         rem_ref_cm_node(cm_core, event->cm_node);
4181         kfree(event);
4182
4183         return;
4184 }